Mercurial > dropbear
annotate keyimport.c @ 1861:2b3a8026a6ce
Add re-exec for server
This allows ASLR to re-randomize the address
space for every connection, preventing some
vulnerabilities from being exploitable by
repeated probing.
Overhead (memory and time) is yet to be confirmed.
At present this is only enabled on Linux. Other BSD platforms
with fexecve() would probably also work though have not been tested.
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Sun, 30 Jan 2022 10:14:56 +0800 |
| parents | 064f5be2fc45 |
| children | 3e0aacf0a4f3 |
| rev | line source |
|---|---|
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1 /* |
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2 * Based on PuTTY's import.c for importing/exporting OpenSSH and SSH.com |
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3 * keyfiles. |
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4 * |
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5 * Modifications copyright 2003 Matt Johnston |
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6 * |
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7 * PuTTY is copyright 1997-2003 Simon Tatham. |
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8 * |
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9 * Portions copyright Robert de Bath, Joris van Rantwijk, Delian |
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10 * Delchev, Andreas Schultz, Jeroen Massar, Wez Furlong, Nicolas Barry, |
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11 * Justin Bradford, and CORE SDI S.A. |
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12 * |
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13 * Permission is hereby granted, free of charge, to any person |
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14 * obtaining a copy of this software and associated documentation files |
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15 * (the "Software"), to deal in the Software without restriction, |
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16 * including without limitation the rights to use, copy, modify, merge, |
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17 * publish, distribute, sublicense, and/or sell copies of the Software, |
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18 * and to permit persons to whom the Software is furnished to do so, |
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19 * subject to the following conditions: |
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20 * |
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21 * The above copyright notice and this permission notice shall be |
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22 * included in all copies or substantial portions of the Software. |
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23 * |
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24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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27 * NONINFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE |
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28 * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF |
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29 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION |
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30 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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31 */ |
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32 |
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33 #include "keyimport.h" |
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34 #include "bignum.h" |
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35 #include "buffer.h" |
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36 #include "dbutil.h" |
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37 #include "ecc.h" |
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38 #include "ssh.h" |
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39 #include "rsa.h" |
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40 #include "dss.h" |
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41 #include "ed25519.h" |
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42 |
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43 static const unsigned char OSSH_PKEY_BLOB[] = |
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44 "openssh-key-v1\0" /* AUTH_MAGIC */ |
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45 "\0\0\0\4none" /* cipher name*/ |
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46 "\0\0\0\4none" /* kdf name */ |
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47 "\0\0\0\0" /* kdf */ |
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48 "\0\0\0\1"; /* key num */ |
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49 #define OSSH_PKEY_BLOBLEN (sizeof(OSSH_PKEY_BLOB) - 1) |
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50 |
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51 #if DROPBEAR_ECDSA |
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52 static const unsigned char OID_SEC256R1_BLOB[] = {0x2a, 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07}; |
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53 static const unsigned char OID_SEC384R1_BLOB[] = {0x2b, 0x81, 0x04, 0x00, 0x22}; |
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54 static const unsigned char OID_SEC521R1_BLOB[] = {0x2b, 0x81, 0x04, 0x00, 0x23}; |
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55 #endif |
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56 |
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57 #define PUT_32BIT(cp, value) do { \ |
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58 (cp)[3] = (unsigned char)(value); \ |
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59 (cp)[2] = (unsigned char)((value) >> 8); \ |
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60 (cp)[1] = (unsigned char)((value) >> 16); \ |
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61 (cp)[0] = (unsigned char)((value) >> 24); } while (0) |
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62 |
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63 #define GET_32BIT(cp) \ |
| 1308 | 64 (((unsigned long)(unsigned char)(cp)[0] << 24) | \ |
| 65 ((unsigned long)(unsigned char)(cp)[1] << 16) | \ | |
| 66 ((unsigned long)(unsigned char)(cp)[2] << 8) | \ | |
| 67 ((unsigned long)(unsigned char)(cp)[3])) | |
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68 |
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69 static int openssh_encrypted(const char *filename); |
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70 static sign_key *openssh_read(const char *filename, const char *passphrase); |
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71 static int openssh_write(const char *filename, sign_key *key, |
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72 const char *passphrase); |
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73 |
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74 static int dropbear_write(const char*filename, sign_key * key); |
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75 static sign_key *dropbear_read(const char* filename); |
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76 |
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77 static int toint(unsigned u); |
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78 |
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79 #if 0 |
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80 static int sshcom_encrypted(const char *filename, char **comment); |
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81 static struct ssh2_userkey *sshcom_read(const char *filename, char *passphrase); |
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82 static int sshcom_write(const char *filename, struct ssh2_userkey *key, |
| 1308 | 83 char *passphrase); |
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84 #endif |
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85 |
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86 int import_encrypted(const char* filename, int filetype) { |
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87 |
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88 if (filetype == KEYFILE_OPENSSH) { |
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89 return openssh_encrypted(filename); |
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90 #if 0 |
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91 } else if (filetype == KEYFILE_SSHCOM) { |
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92 return sshcom_encrypted(filename, NULL); |
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93 #endif |
| 1308 | 94 } |
| 95 return 0; | |
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96 } |
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97 |
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98 sign_key *import_read(const char *filename, const char *passphrase, int filetype) { |
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99 |
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100 if (filetype == KEYFILE_OPENSSH) { |
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101 return openssh_read(filename, passphrase); |
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102 } else if (filetype == KEYFILE_DROPBEAR) { |
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103 return dropbear_read(filename); |
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104 #if 0 |
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105 } else if (filetype == KEYFILE_SSHCOM) { |
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106 return sshcom_read(filename, passphrase); |
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107 #endif |
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108 } |
| 1308 | 109 return NULL; |
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110 } |
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111 |
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112 int import_write(const char *filename, sign_key *key, const char *passphrase, |
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113 int filetype) { |
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114 |
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115 if (filetype == KEYFILE_OPENSSH) { |
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116 return openssh_write(filename, key, passphrase); |
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117 } else if (filetype == KEYFILE_DROPBEAR) { |
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118 return dropbear_write(filename, key); |
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119 #if 0 |
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120 } else if (filetype == KEYFILE_SSHCOM) { |
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121 return sshcom_write(filename, key, passphrase); |
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122 #endif |
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123 } |
| 1308 | 124 return 0; |
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|
125 } |
|
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|
126 |
|
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|
127 static sign_key *dropbear_read(const char* filename) { |
|
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|
128 |
|
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129 buffer * buf = NULL; |
|
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|
130 sign_key *ret = NULL; |
|
846
b298bb438625
refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
845
diff
changeset
|
131 enum signkey_type type; |
|
4
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132 |
|
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Dropbearkey can now print out pubkey portions
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4
diff
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|
133 buf = buf_new(MAX_PRIVKEY_SIZE); |
|
0bf5cebe622c
Dropbearkey can now print out pubkey portions
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4
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|
134 if (buf_readfile(buf, filename) == DROPBEAR_FAILURE) { |
|
4
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135 goto error; |
|
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|
136 } |
|
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|
137 |
|
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138 buf_setpos(buf, 0); |
|
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|
139 ret = new_sign_key(); |
|
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|
140 |
|
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|
141 type = DROPBEAR_SIGNKEY_ANY; |
|
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|
142 if (buf_get_priv_key(buf, ret, &type) == DROPBEAR_FAILURE){ |
|
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|
143 goto error; |
|
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|
144 } |
|
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|
145 buf_free(buf); |
|
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|
146 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
147 ret->type = type; |
|
d7d9f1612d51
writing out openssh ecc keys works
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diff
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|
148 |
|
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|
149 return ret; |
|
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|
150 |
|
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|
151 error: |
|
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|
152 if (buf) { |
|
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|
153 buf_free(buf); |
|
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|
154 } |
|
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|
155 if (ret) { |
|
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|
156 sign_key_free(ret); |
|
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|
157 } |
|
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|
158 return NULL; |
|
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|
159 } |
|
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|
160 |
|
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|
161 /* returns 0 on fail, 1 on success */ |
|
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|
162 static int dropbear_write(const char*filename, sign_key * key) { |
|
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|
163 |
|
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|
164 buffer * buf; |
|
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|
165 FILE*fp; |
|
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|
166 int len; |
|
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|
167 int ret; |
|
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|
168 |
|
73
0bf5cebe622c
Dropbearkey can now print out pubkey portions
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
169 buf = buf_new(MAX_PRIVKEY_SIZE); |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
170 buf_put_priv_key(buf, key, key->type); |
|
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171 |
|
87
680a0bc9df0a
Some small fixes for unused vars, and old messages
Matt Johnston <matt@ucc.asn.au>
parents:
73
diff
changeset
|
172 fp = fopen(filename, "w"); |
|
4
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|
173 if (!fp) { |
|
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|
174 ret = 0; |
|
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parents:
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|
175 goto out; |
|
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parents:
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|
176 } |
|
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|
177 |
|
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|
178 buf_setpos(buf, 0); |
|
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|
179 do { |
|
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|
180 len = fwrite(buf_getptr(buf, buf->len - buf->pos), |
|
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|
181 1, buf->len - buf->pos, fp); |
|
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|
182 buf_incrpos(buf, len); |
|
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|
183 } while (len > 0 && buf->len != buf->pos); |
|
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|
184 |
|
256
ac890087b8c1
* keyimport.c: fclose() the key file to make sure data gets written
Matt Johnston <matt@ucc.asn.au>
parents:
241
diff
changeset
|
185 fclose(fp); |
|
ac890087b8c1
* keyimport.c: fclose() the key file to make sure data gets written
Matt Johnston <matt@ucc.asn.au>
parents:
241
diff
changeset
|
186 |
|
4
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|
187 if (buf->pos != buf->len) { |
|
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|
188 ret = 0; |
|
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parents:
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|
189 } else { |
|
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|
190 ret = 1; |
|
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parents:
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|
191 } |
|
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parents:
diff
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|
192 out: |
|
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parents:
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|
193 buf_free(buf); |
|
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|
194 return ret; |
|
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parents:
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|
195 } |
|
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|
196 |
|
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|
197 |
|
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|
198 /* ---------------------------------------------------------------------- |
|
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|
199 * Helper routines. (The base64 ones are defined in sshpubk.c.) |
|
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|
200 */ |
|
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|
201 |
|
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parents:
diff
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|
202 #define isbase64(c) ( ((c) >= 'A' && (c) <= 'Z') || \ |
| 1308 | 203 ((c) >= 'a' && (c) <= 'z') || \ |
| 204 ((c) >= '0' && (c) <= '9') || \ | |
| 205 (c) == '+' || (c) == '/' || (c) == '=' \ | |
| 206 ) | |
|
4
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|
207 |
|
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parents:
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changeset
|
208 /* cpl has to be less than 100 */ |
|
1459
06d52bcb8094
Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents:
1395
diff
changeset
|
209 static void base64_encode_fp(FILE * fp, const unsigned char *data, |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
210 int datalen, int cpl) |
|
fe6bca95afa7
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parents:
diff
changeset
|
211 { |
|
1094
c45d65392c1a
Fix pointer differ in signess warnings [-Werror=pointer-sign]
Gaël PORTAY <gael.portay@gmail.com>
parents:
1089
diff
changeset
|
212 unsigned char out[100]; |
| 1250 | 213 int n; |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
214 unsigned long outlen; |
|
fe6bca95afa7
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parents:
diff
changeset
|
215 int rawcpl; |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
216 rawcpl = cpl * 3 / 4; |
|
241
c5d3ef11155f
* use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents:
87
diff
changeset
|
217 dropbear_assert((unsigned int)cpl < sizeof(out)); |
|
4
fe6bca95afa7
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|
218 |
| 1250 | 219 while (datalen > 0) { |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
220 n = (datalen < rawcpl ? datalen : rawcpl); |
|
fe6bca95afa7
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parents:
diff
changeset
|
221 outlen = sizeof(out); |
|
fe6bca95afa7
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parents:
diff
changeset
|
222 base64_encode(data, n, out, &outlen); |
|
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
223 data += n; |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
224 datalen -= n; |
|
fe6bca95afa7
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parents:
diff
changeset
|
225 fwrite(out, 1, outlen, fp); |
|
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parents:
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changeset
|
226 fputc('\n', fp); |
| 1250 | 227 } |
|
4
fe6bca95afa7
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parents:
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changeset
|
228 } |
|
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parents:
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|
229 /* |
|
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|
230 * Read an ASN.1/BER identifier and length pair. |
|
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parents:
diff
changeset
|
231 * |
|
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parents:
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|
232 * Flags are a combination of the #defines listed below. |
|
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parents:
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|
233 * |
|
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parents:
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|
234 * Returns -1 if unsuccessful; otherwise returns the number of |
|
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parents:
diff
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|
235 * bytes used out of the source data. |
|
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parents:
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changeset
|
236 */ |
|
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parents:
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changeset
|
237 |
|
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parents:
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changeset
|
238 /* ASN.1 tag classes. */ |
|
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parents:
diff
changeset
|
239 #define ASN1_CLASS_UNIVERSAL (0 << 6) |
|
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parents:
diff
changeset
|
240 #define ASN1_CLASS_APPLICATION (1 << 6) |
|
fe6bca95afa7
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parents:
diff
changeset
|
241 #define ASN1_CLASS_CONTEXT_SPECIFIC (2 << 6) |
|
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parents:
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changeset
|
242 #define ASN1_CLASS_PRIVATE (3 << 6) |
|
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parents:
diff
changeset
|
243 #define ASN1_CLASS_MASK (3 << 6) |
|
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parents:
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|
244 |
|
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parents:
diff
changeset
|
245 /* Primitive versus constructed bit. */ |
|
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parents:
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changeset
|
246 #define ASN1_CONSTRUCTED (1 << 5) |
|
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parents:
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|
247 |
|
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parents:
diff
changeset
|
248 static int ber_read_id_len(void *source, int sourcelen, |
| 1308 | 249 int *id, int *length, int *flags) |
|
4
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|
250 { |
| 1308 | 251 unsigned char *p = (unsigned char *) source; |
|
4
fe6bca95afa7
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|
252 |
| 1308 | 253 if (sourcelen == 0) |
| 254 return -1; | |
|
4
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parents:
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|
255 |
| 1308 | 256 *flags = (*p & 0xE0); |
| 257 if ((*p & 0x1F) == 0x1F) { | |
| 258 *id = 0; | |
| 259 while (*p & 0x80) { | |
| 260 p++, sourcelen--; | |
| 261 if (sourcelen == 0) | |
| 262 return -1; | |
| 263 *id = (*id << 7) | (*p & 0x7F); | |
| 264 } | |
| 265 p++, sourcelen--; | |
| 266 } else { | |
| 267 *id = *p & 0x1F; | |
| 268 p++, sourcelen--; | |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
269 } |
|
1306
34e6127ef02e
merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
parents:
1250
diff
changeset
|
270 |
| 1308 | 271 if (sourcelen == 0) |
| 272 return -1; | |
|
4
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parents:
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|
273 |
| 1308 | 274 if (*p & 0x80) { |
| 275 unsigned len; | |
| 276 int n = *p & 0x7F; | |
| 277 p++, sourcelen--; | |
| 278 if (sourcelen < n) | |
| 279 return -1; | |
| 280 len = 0; | |
| 281 while (n--) | |
| 282 len = (len << 8) | (*p++); | |
| 283 sourcelen -= n; | |
| 284 *length = toint(len); | |
| 285 } else { | |
| 286 *length = *p; | |
| 287 p++, sourcelen--; | |
| 288 } | |
|
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289 |
| 1308 | 290 if (*length < 0) { |
| 291 printf("Negative ASN.1 length\n"); | |
| 292 return -1; | |
| 293 } | |
|
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294 |
| 1308 | 295 return p - (unsigned char *) source; |
|
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296 } |
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297 |
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298 /* |
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299 * Write an ASN.1/BER identifier and length pair. Returns the |
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300 * number of bytes consumed. Assumes dest contains enough space. |
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301 * Will avoid writing anything if dest is NULL, but still return |
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302 * amount of space required. |
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303 */ |
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304 static int ber_write_id_len(void *dest, int id, int length, int flags) |
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305 { |
| 1308 | 306 unsigned char *d = (unsigned char *)dest; |
| 307 int len = 0; | |
|
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308 |
| 1308 | 309 if (id <= 30) { |
| 310 /* | |
| 311 * Identifier is one byte. | |
| 312 */ | |
| 313 len++; | |
| 314 if (d) *d++ = id | flags; | |
| 315 } else { | |
| 316 int n; | |
| 317 /* | |
| 318 * Identifier is multiple bytes: the first byte is 11111 | |
| 319 * plus the flags, and subsequent bytes encode the value of | |
| 320 * the identifier, 7 bits at a time, with the top bit of | |
| 321 * each byte 1 except the last one which is 0. | |
| 322 */ | |
| 323 len++; | |
| 324 if (d) *d++ = 0x1F | flags; | |
| 325 for (n = 1; (id >> (7*n)) > 0; n++) | |
|
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326 continue; /* count the bytes */ |
| 1308 | 327 while (n--) { |
| 328 len++; | |
| 329 if (d) *d++ = (n ? 0x80 : 0) | ((id >> (7*n)) & 0x7F); | |
| 330 } | |
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331 } |
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332 |
| 1308 | 333 if (length < 128) { |
| 334 /* | |
| 335 * Length is one byte. | |
| 336 */ | |
| 337 len++; | |
| 338 if (d) *d++ = length; | |
| 339 } else { | |
| 340 int n; | |
| 341 /* | |
| 342 * Length is multiple bytes. The first is 0x80 plus the | |
| 343 * number of subsequent bytes, and the subsequent bytes | |
| 344 * encode the actual length. | |
| 345 */ | |
| 346 for (n = 1; (length >> (8*n)) > 0; n++) | |
|
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347 continue; /* count the bytes */ |
| 1308 | 348 len++; |
| 349 if (d) *d++ = 0x80 | n; | |
| 350 while (n--) { | |
| 351 len++; | |
| 352 if (d) *d++ = (length >> (8*n)) & 0xFF; | |
| 353 } | |
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354 } |
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355 |
| 1308 | 356 return len; |
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357 } |
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358 |
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359 |
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360 /* Simple structure to point to an mp-int within a blob. */ |
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361 struct mpint_pos { void *start; int bytes; }; |
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362 |
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363 /* ---------------------------------------------------------------------- |
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364 * Code to read and write OpenSSH private keys. |
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365 */ |
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366 |
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367 enum { OSSH_DSA, OSSH_RSA, OSSH_EC, OSSH_PKEY }; |
|
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368 struct openssh_key { |
| 1308 | 369 int type; |
| 370 int encrypted; | |
| 371 char iv[32]; | |
| 372 unsigned char *keyblob; | |
|
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373 unsigned int keyblob_len, keyblob_size; |
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374 }; |
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375 |
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376 static struct openssh_key *load_openssh_key(const char *filename) |
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377 { |
| 1308 | 378 struct openssh_key *ret; |
|
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379 buffer *buf = NULL; |
| 340 | 380 FILE *fp = NULL; |
| 1308 | 381 char buffer[256]; |
|
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382 char *errmsg = NULL, *p = NULL; |
| 1308 | 383 int headers_done; |
|
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384 unsigned long len; |
|
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385 |
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386 ret = (struct openssh_key*)m_malloc(sizeof(struct openssh_key)); |
| 1308 | 387 ret->keyblob = NULL; |
| 388 ret->keyblob_len = ret->keyblob_size = 0; | |
| 389 ret->encrypted = 0; | |
| 390 memset(ret->iv, 0, sizeof(ret->iv)); | |
|
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391 |
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392 if (strlen(filename) == 1 && filename[0] == '-') { |
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393 fp = stdin; |
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394 } else { |
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395 fp = fopen(filename, "r"); |
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396 } |
| 1308 | 397 if (!fp) { |
| 398 errmsg = "Unable to open key file"; | |
| 399 goto error; | |
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400 } |
| 1308 | 401 if (!fgets(buffer, sizeof(buffer), fp) || |
| 402 0 != strncmp(buffer, "-----BEGIN ", 11) || | |
| 403 0 != strcmp(buffer+strlen(buffer)-17, "PRIVATE KEY-----\n")) { | |
| 404 errmsg = "File does not begin with OpenSSH key header"; | |
|
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405 goto error; |
| 1308 | 406 } |
| 407 if (!strcmp(buffer, "-----BEGIN RSA PRIVATE KEY-----\n")) | |
| 408 ret->type = OSSH_RSA; | |
| 409 else if (!strcmp(buffer, "-----BEGIN DSA PRIVATE KEY-----\n")) | |
| 410 ret->type = OSSH_DSA; | |
|
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A bit of work on ecdsa for host/auth keys
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411 else if (!strcmp(buffer, "-----BEGIN EC PRIVATE KEY-----\n")) |
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412 ret->type = OSSH_EC; |
|
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413 else if (!strcmp(buffer, "-----BEGIN OPENSSH PRIVATE KEY-----\n")) |
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414 ret->type = OSSH_PKEY; |
| 1308 | 415 else { |
| 416 errmsg = "Unrecognised key type"; | |
| 417 goto error; | |
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418 } |
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419 |
| 1308 | 420 headers_done = 0; |
|
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421 buf = buf_new(0); |
| 1308 | 422 while (1) { |
| 423 if (!fgets(buffer, sizeof(buffer), fp)) { | |
| 424 errmsg = "Unexpected end of file"; | |
| 425 goto error; | |
| 426 } | |
| 427 if (0 == strncmp(buffer, "-----END ", 9) && | |
| 428 0 == strcmp(buffer+strlen(buffer)-17, "PRIVATE KEY-----\n")) | |
|
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429 break; /* done */ |
| 1308 | 430 if ((p = strchr(buffer, ':')) != NULL) { |
| 431 if (headers_done) { | |
| 432 errmsg = "Header found in body of key data"; | |
| 433 goto error; | |
| 434 } | |
| 435 *p++ = '\0'; | |
| 436 while (*p && isspace((unsigned char)*p)) p++; | |
| 437 if (!strcmp(buffer, "Proc-Type")) { | |
| 438 if (p[0] != '4' || p[1] != ',') { | |
| 439 errmsg = "Proc-Type is not 4 (only 4 is supported)"; | |
| 440 goto error; | |
| 441 } | |
| 442 p += 2; | |
| 443 if (!strcmp(p, "ENCRYPTED\n")) | |
| 444 ret->encrypted = 1; | |
| 445 } else if (!strcmp(buffer, "DEK-Info")) { | |
| 446 int i, j; | |
|
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diff
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|
447 |
| 1308 | 448 if (strncmp(p, "DES-EDE3-CBC,", 13)) { |
| 449 errmsg = "Ciphers other than DES-EDE3-CBC not supported"; | |
| 450 goto error; | |
| 451 } | |
| 452 p += 13; | |
| 453 for (i = 0; i < 8; i++) { | |
| 454 if (1 != sscanf(p, "%2x", &j)) | |
| 455 break; | |
| 456 ret->iv[i] = j; | |
| 457 p += 2; | |
| 458 } | |
| 459 if (i < 8) { | |
| 460 errmsg = "Expected 16-digit iv in DEK-Info"; | |
| 461 goto error; | |
| 462 } | |
| 463 } | |
| 464 } else { | |
| 465 headers_done = 1; | |
|
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|
466 len = strlen(buffer); |
|
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|
467 buf = buf_resize(buf, buf->size + len); |
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|
468 buf_putbytes(buf, buffer, len); |
| 1308 | 469 } |
|
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|
470 } |
| 1308 | 471 |
|
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|
472 if (buf && buf->len) { |
|
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473 ret->keyblob_size = ret->keyblob_len + buf->len*4/3 + 256; |
|
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474 ret->keyblob = (unsigned char*)m_realloc(ret->keyblob, ret->keyblob_size); |
|
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475 len = ret->keyblob_size; |
|
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|
476 if (base64_decode((const unsigned char *)buf->data, buf->len, |
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|
477 ret->keyblob, &len) != CRYPT_OK){ |
|
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Add Ed25519 support (#91)
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|
478 errmsg = "Error decoding base64"; |
|
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479 goto error; |
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|
480 } |
|
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|
481 ret->keyblob_len = len; |
|
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482 } |
|
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|
483 |
|
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|
484 if (ret->type == OSSH_PKEY) { |
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Add Ed25519 support (#91)
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485 if (ret->keyblob_len < OSSH_PKEY_BLOBLEN || |
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486 memcmp(ret->keyblob, OSSH_PKEY_BLOB, OSSH_PKEY_BLOBLEN)) { |
|
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487 errmsg = "Error decoding OpenSSH key"; |
|
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488 goto error; |
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|
489 } |
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490 ret->keyblob_len -= OSSH_PKEY_BLOBLEN; |
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491 memmove(ret->keyblob, ret->keyblob + OSSH_PKEY_BLOBLEN, ret->keyblob_len); |
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492 } |
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493 |
| 1308 | 494 if (ret->keyblob_len == 0 || !ret->keyblob) { |
| 495 errmsg = "Key body not present"; | |
| 496 goto error; | |
| 497 } | |
| 498 | |
| 499 if (ret->encrypted && ret->keyblob_len % 8 != 0) { | |
| 500 errmsg = "Encrypted key blob is not a multiple of cipher block size"; | |
| 501 goto error; | |
| 502 } | |
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503 |
|
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504 if (buf) { |
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505 buf_burn(buf); |
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506 buf_free(buf); |
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507 } |
|
1045
31727a8abd4b
Use m_burn rather than memset
Thorsten Horstmann <thorsten.horstmann@web.de>
parents:
1038
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508 m_burn(buffer, sizeof(buffer)); |
| 1308 | 509 return ret; |
|
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510 |
| 1308 | 511 error: |
|
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512 if (buf) { |
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513 buf_burn(buf); |
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514 buf_free(buf); |
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515 } |
|
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516 m_burn(buffer, sizeof(buffer)); |
| 1308 | 517 if (ret) { |
| 518 if (ret->keyblob) { | |
|
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519 m_burn(ret->keyblob, ret->keyblob_size); |
|
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520 m_free(ret->keyblob); |
| 1308 | 521 } |
|
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522 m_free(ret); |
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523 } |
| 340 | 524 if (fp) { |
| 525 fclose(fp); | |
| 1308 | 526 } |
|
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527 if (errmsg) { |
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528 fprintf(stderr, "Error: %s\n", errmsg); |
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529 } |
| 1308 | 530 return NULL; |
|
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531 } |
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532 |
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533 static int openssh_encrypted(const char *filename) |
|
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534 { |
| 1308 | 535 struct openssh_key *key = load_openssh_key(filename); |
| 536 int ret; | |
|
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537 |
| 1308 | 538 if (!key) |
| 539 return 0; | |
| 540 ret = key->encrypted; | |
|
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541 m_burn(key->keyblob, key->keyblob_size); |
|
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542 m_free(key->keyblob); |
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543 m_free(key); |
| 1308 | 544 return ret; |
|
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545 } |
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546 |
|
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547 static sign_key *openssh_read(const char *filename, const char * UNUSED(passphrase)) |
|
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548 { |
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549 struct openssh_key *key; |
| 1308 | 550 unsigned char *p; |
| 551 int ret, id, len, flags; | |
|
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552 int i, num_integers = 0; |
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553 sign_key *retval = NULL; |
| 1308 | 554 char *errmsg; |
|
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555 unsigned char *modptr = NULL; |
|
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556 int modlen = -9999; |
|
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557 enum signkey_type type; |
|
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558 |
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559 sign_key *retkey; |
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560 buffer * blobbuf = NULL; |
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561 |
|
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hackish ECC import code from OpenSSH
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562 retkey = new_sign_key(); |
|
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563 |
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564 key = load_openssh_key(filename); |
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565 |
| 1308 | 566 if (!key) |
| 567 return NULL; | |
|
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568 |
| 1308 | 569 if (key->encrypted) { |
|
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570 errmsg = "encrypted keys not supported currently"; |
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571 goto error; |
|
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572 #if 0 |
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573 /* matt TODO */ |
| 1308 | 574 /* |
| 575 * Derive encryption key from passphrase and iv/salt: | |
| 576 * | |
| 577 * - let block A equal MD5(passphrase || iv) | |
| 578 * - let block B equal MD5(A || passphrase || iv) | |
| 579 * - block C would be MD5(B || passphrase || iv) and so on | |
| 580 * - encryption key is the first N bytes of A || B | |
| 581 */ | |
| 582 struct MD5Context md5c; | |
| 583 unsigned char keybuf[32]; | |
| 584 | |
| 585 MD5Init(&md5c); | |
| 586 MD5Update(&md5c, (unsigned char *)passphrase, strlen(passphrase)); | |
| 587 MD5Update(&md5c, (unsigned char *)key->iv, 8); | |
| 588 MD5Final(keybuf, &md5c); | |
|
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589 |
| 1308 | 590 MD5Init(&md5c); |
| 591 MD5Update(&md5c, keybuf, 16); | |
| 592 MD5Update(&md5c, (unsigned char *)passphrase, strlen(passphrase)); | |
| 593 MD5Update(&md5c, (unsigned char *)key->iv, 8); | |
| 594 MD5Final(keybuf+16, &md5c); | |
|
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595 |
| 1308 | 596 /* |
| 597 * Now decrypt the key blob. | |
| 598 */ | |
| 599 des3_decrypt_pubkey_ossh(keybuf, (unsigned char *)key->iv, | |
| 600 key->keyblob, key->keyblob_len); | |
| 601 | |
| 602 memset(&md5c, 0, sizeof(md5c)); | |
| 603 memset(keybuf, 0, sizeof(keybuf)); | |
| 604 #endif | |
| 605 } | |
|
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606 |
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607 /* |
|
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608 * Now we have a decrypted key blob, which contains OpenSSH |
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609 * encoded private key. We must now untangle the OpenSSH format. |
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610 */ |
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611 if (key->type == OSSH_PKEY) { |
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612 blobbuf = buf_new(key->keyblob_len); |
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613 buf_putbytes(blobbuf, key->keyblob, key->keyblob_len); |
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614 buf_setpos(blobbuf, 0); |
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|
615 |
|
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616 /* limit length of private key blob */ |
|
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617 len = buf_getint(blobbuf); |
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618 buf_setlen(blobbuf, blobbuf->pos + len); |
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|
619 |
|
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620 type = DROPBEAR_SIGNKEY_ANY; |
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621 if (buf_get_pub_key(blobbuf, retkey, &type) |
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|
622 != DROPBEAR_SUCCESS) { |
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|
623 errmsg = "Error parsing OpenSSH key"; |
|
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624 goto ossh_error; |
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625 } |
|
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|
626 |
|
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|
627 /* restore full length */ |
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628 buf_setlen(blobbuf, key->keyblob_len); |
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|
629 |
|
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630 if (type != DROPBEAR_SIGNKEY_NONE) { |
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|
631 retkey->type = type; |
|
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|
632 /* limit length of private key blob */ |
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|
633 len = buf_getint(blobbuf); |
|
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|
634 buf_setlen(blobbuf, blobbuf->pos + len); |
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|
635 #if DROPBEAR_ED25519 |
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636 if (type == DROPBEAR_SIGNKEY_ED25519) { |
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|
637 buf_incrpos(blobbuf, 8); |
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|
638 buf_eatstring(blobbuf); |
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639 buf_eatstring(blobbuf); |
| 1754 | 640 buf_decrpos(blobbuf, SSH_SIGNKEY_ED25519_LEN+4); |
|
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641 if (buf_get_ed25519_priv_key(blobbuf, retkey->ed25519key) |
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|
642 == DROPBEAR_SUCCESS) { |
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|
643 errmsg = NULL; |
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644 retval = retkey; |
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645 goto error; |
|
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646 } |
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647 } |
|
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648 #endif |
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649 } |
|
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|
650 |
|
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651 errmsg = "Unsupported OpenSSH key type"; |
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652 ossh_error: |
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653 sign_key_free(retkey); |
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654 retkey = NULL; |
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655 goto error; |
|
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656 } |
|
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657 |
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|
658 /* |
| 1308 | 659 * Now we have a decrypted key blob, which contains an ASN.1 |
| 660 * encoded private key. We must now untangle the ASN.1. | |
| 661 * | |
| 662 * We expect the whole key blob to be formatted as a SEQUENCE | |
| 663 * (0x30 followed by a length code indicating that the rest of | |
| 664 * the blob is part of the sequence). Within that SEQUENCE we | |
| 665 * expect to see a bunch of INTEGERs. What those integers mean | |
| 666 * depends on the key type: | |
| 667 * | |
| 668 * - For RSA, we expect the integers to be 0, n, e, d, p, q, | |
|
4
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|
669 * dmp1, dmq1, iqmp in that order. (The last three are d mod |
|
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670 * (p-1), d mod (q-1), inverse of q mod p respectively.) |
| 1308 | 671 * |
| 672 * - For DSA, we expect them to be 0, p, q, g, y, x in that | |
|
4
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673 * order. |
|
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|
674 */ |
| 1308 | 675 |
| 676 p = key->keyblob; | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
677 |
| 1308 | 678 /* Expect the SEQUENCE header. Take its absence as a failure to decrypt. */ |
| 679 ret = ber_read_id_len(p, key->keyblob_len, &id, &len, &flags); | |
| 680 p += ret; | |
| 681 if (ret < 0 || id != 16 || len < 0 || | |
| 682 key->keyblob+key->keyblob_len-p < len) { | |
| 683 errmsg = "ASN.1 decoding failure"; | |
| 684 goto error; | |
| 685 } | |
|
1306
34e6127ef02e
merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
parents:
1250
diff
changeset
|
686 |
| 1308 | 687 /* Expect a load of INTEGERs. */ |
| 688 if (key->type == OSSH_RSA) | |
| 689 num_integers = 9; | |
| 690 else if (key->type == OSSH_DSA) | |
| 691 num_integers = 6; | |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
692 else if (key->type == OSSH_EC) |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
693 num_integers = 1; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
694 |
| 1308 | 695 /* |
| 696 * Space to create key blob in. | |
| 697 */ | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
698 blobbuf = buf_new(3000); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
699 |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
700 #if DROPBEAR_DSS |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
701 if (key->type == OSSH_DSA) { |
|
1122
aaf576b27a10
Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents:
1119
diff
changeset
|
702 buf_putstring(blobbuf, "ssh-dss", 7); |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
703 retkey->type = DROPBEAR_SIGNKEY_DSS; |
|
935
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
704 } |
|
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
705 #endif |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
706 #if DROPBEAR_RSA |
|
935
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
707 if (key->type == OSSH_RSA) { |
|
1122
aaf576b27a10
Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents:
1119
diff
changeset
|
708 buf_putstring(blobbuf, "ssh-rsa", 7); |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
709 retkey->type = DROPBEAR_SIGNKEY_RSA; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
710 } |
|
935
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
711 #endif |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
712 |
| 1308 | 713 for (i = 0; i < num_integers; i++) { |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
714 ret = ber_read_id_len(p, key->keyblob+key->keyblob_len-p, |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
715 &id, &len, &flags); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
716 p += ret; |
| 1308 | 717 if (ret < 0 || id != 2 || len < 0 || |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
718 key->keyblob+key->keyblob_len-p < len) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
719 errmsg = "ASN.1 decoding failure"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
720 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
721 } |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
722 |
| 1308 | 723 if (i == 0) { |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
724 /* First integer is a version indicator */ |
|
991
4f65c867fc99
Fix variables may be uninitialized.
Like Ma <likemartinma@gmail.com>
parents:
935
diff
changeset
|
725 int expected = -1; |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
726 switch (key->type) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
727 case OSSH_RSA: |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
728 case OSSH_DSA: |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
729 expected = 0; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
730 break; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
731 case OSSH_EC: |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
732 expected = 1; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
733 break; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
734 } |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
735 if (len != 1 || p[0] != expected) { |
| 1308 | 736 errmsg = "Version number mismatch"; |
| 737 goto error; | |
| 738 } | |
| 739 } else if (key->type == OSSH_RSA) { | |
| 740 /* | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
741 * OpenSSH key order is n, e, d, p, q, dmp1, dmq1, iqmp |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
742 * but we want e, n, d, p, q |
| 1308 | 743 */ |
| 744 if (i == 1) { | |
| 745 /* Save the details for after we deal with number 2. */ | |
|
1119
845922d73e9c
Turn modptr local variable into unsigned char *
Gaël PORTAY <gael.portay@gmail.com>
parents:
1094
diff
changeset
|
746 modptr = p; |
| 1308 | 747 modlen = len; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
748 } else if (i >= 2 && i <= 5) { |
|
1122
aaf576b27a10
Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents:
1119
diff
changeset
|
749 buf_putstring(blobbuf, (const char*)p, len); |
| 1308 | 750 if (i == 2) { |
|
1122
aaf576b27a10
Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents:
1119
diff
changeset
|
751 buf_putstring(blobbuf, (const char*)modptr, modlen); |
| 1308 | 752 } |
| 753 } | |
| 754 } else if (key->type == OSSH_DSA) { | |
| 755 /* | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
756 * OpenSSH key order is p, q, g, y, x, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
757 * we want the same. |
| 1308 | 758 */ |
|
1122
aaf576b27a10
Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents:
1119
diff
changeset
|
759 buf_putstring(blobbuf, (const char*)p, len); |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
760 } |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
761 |
| 1308 | 762 /* Skip past the number. */ |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
763 p += len; |
| 1308 | 764 } |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
765 |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
766 #if DROPBEAR_ECDSA |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
767 if (key->type == OSSH_EC) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
768 unsigned char* private_key_bytes = NULL; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
769 int private_key_len = 0; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
770 unsigned char* public_key_bytes = NULL; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
771 int public_key_len = 0; |
|
807
75509065db53
have separate ecdsa keys for each size
Matt Johnston <matt@ucc.asn.au>
parents:
806
diff
changeset
|
772 ecc_key *ecc = NULL; |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
773 const struct dropbear_ecc_curve *curve = NULL; |
| 1308 | 774 |
| 857 | 775 /* See SEC1 v2, Appendix C.4 */ |
| 776 /* OpenSSL (so OpenSSH) seems to include the optional parts. */ | |
| 1308 | 777 |
| 857 | 778 /* privateKey OCTET STRING, */ |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
779 ret = ber_read_id_len(p, key->keyblob+key->keyblob_len-p, |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
780 &id, &len, &flags); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
781 p += ret; |
| 857 | 782 /* id==4 for octet string */ |
|
1395
77c0d57a4410
fix indentation
Francois Perrad <francois.perrad@gadz.org>
parents:
1316
diff
changeset
|
783 if (ret < 0 || id != 4 || len < 0 || |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
784 key->keyblob+key->keyblob_len-p < len) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
785 errmsg = "ASN.1 decoding failure"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
786 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
787 } |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
788 private_key_bytes = p; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
789 private_key_len = len; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
790 p += len; |
| 1308 | 791 |
| 857 | 792 /* parameters [0] ECDomainParameters {{ SECGCurveNames }} OPTIONAL, */ |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
793 ret = ber_read_id_len(p, key->keyblob+key->keyblob_len-p, |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
794 &id, &len, &flags); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
795 p += ret; |
| 857 | 796 /* id==0 */ |
|
1395
77c0d57a4410
fix indentation
Francois Perrad <francois.perrad@gadz.org>
parents:
1316
diff
changeset
|
797 if (ret < 0 || id != 0 || len < 0) { |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
798 errmsg = "ASN.1 decoding failure"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
799 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
800 } |
| 1308 | 801 |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
802 ret = ber_read_id_len(p, key->keyblob+key->keyblob_len-p, |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
803 &id, &len, &flags); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
804 p += ret; |
| 857 | 805 /* id==6 for object */ |
|
1395
77c0d57a4410
fix indentation
Francois Perrad <francois.perrad@gadz.org>
parents:
1316
diff
changeset
|
806 if (ret < 0 || id != 6 || len < 0 || |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
807 key->keyblob+key->keyblob_len-p < len) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
808 errmsg = "ASN.1 decoding failure"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
809 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
810 } |
| 1308 | 811 |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
812 if (0) {} |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
813 #if DROPBEAR_ECC_256 |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
814 else if (len == sizeof(OID_SEC256R1_BLOB) |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
815 && memcmp(p, OID_SEC256R1_BLOB, len) == 0) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
816 retkey->type = DROPBEAR_SIGNKEY_ECDSA_NISTP256; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
817 curve = &ecc_curve_nistp256; |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
818 } |
| 1308 | 819 #endif |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
820 #if DROPBEAR_ECC_384 |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
821 else if (len == sizeof(OID_SEC384R1_BLOB) |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
822 && memcmp(p, OID_SEC384R1_BLOB, len) == 0) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
823 retkey->type = DROPBEAR_SIGNKEY_ECDSA_NISTP384; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
824 curve = &ecc_curve_nistp384; |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
825 } |
| 1308 | 826 #endif |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
827 #if DROPBEAR_ECC_521 |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
828 else if (len == sizeof(OID_SEC521R1_BLOB) |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
829 && memcmp(p, OID_SEC521R1_BLOB, len) == 0) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
830 retkey->type = DROPBEAR_SIGNKEY_ECDSA_NISTP521; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
831 curve = &ecc_curve_nistp521; |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
832 } |
| 1308 | 833 #endif |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
834 else { |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
835 errmsg = "Unknown ECC key type"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
836 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
837 } |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
838 p += len; |
| 1308 | 839 |
| 857 | 840 /* publicKey [1] BIT STRING OPTIONAL */ |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
841 ret = ber_read_id_len(p, key->keyblob+key->keyblob_len-p, |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
842 &id, &len, &flags); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
843 p += ret; |
| 857 | 844 /* id==1 */ |
|
1395
77c0d57a4410
fix indentation
Francois Perrad <francois.perrad@gadz.org>
parents:
1316
diff
changeset
|
845 if (ret < 0 || id != 1 || len < 0) { |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
846 errmsg = "ASN.1 decoding failure"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
847 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
848 } |
| 1308 | 849 |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
850 ret = ber_read_id_len(p, key->keyblob+key->keyblob_len-p, |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
851 &id, &len, &flags); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
852 p += ret; |
| 857 | 853 /* id==3 for bit string */ |
|
1395
77c0d57a4410
fix indentation
Francois Perrad <francois.perrad@gadz.org>
parents:
1316
diff
changeset
|
854 if (ret < 0 || id != 3 || len < 0 || |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
855 key->keyblob+key->keyblob_len-p < len) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
856 errmsg = "ASN.1 decoding failure"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
857 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
858 } |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
859 public_key_bytes = p+1; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
860 public_key_len = len-1; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
861 p += len; |
| 1308 | 862 |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
863 buf_putbytes(blobbuf, public_key_bytes, public_key_len); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
864 ecc = buf_get_ecc_raw_pubkey(blobbuf, curve); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
865 if (!ecc) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
866 errmsg = "Error parsing ECC key"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
867 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
868 } |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
869 m_mp_alloc_init_multi((mp_int**)&ecc->k, NULL); |
|
1692
1051e4eea25a
Update LibTomMath to 1.2.0 (#84)
Steffen Jaeckel <s@jaeckel.eu>
parents:
1674
diff
changeset
|
870 if (mp_from_ubin(ecc->k, private_key_bytes, private_key_len) |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
871 != MP_OKAY) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
872 errmsg = "Error parsing ECC key"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
873 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
874 } |
| 1308 | 875 |
|
841
d4ce5269a439
Fix specifying a keysize for key generation, fix key name arguments
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
876 *signkey_key_ptr(retkey, retkey->type) = ecc; |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
877 } |
| 1308 | 878 #endif /* DROPBEAR_ECDSA */ |
| 879 | |
| 880 /* | |
| 881 * Now put together the actual key. Simplest way to do this is | |
| 882 * to assemble our own key blobs and feed them to the createkey | |
| 883 * functions; this is a bit faffy but it does mean we get all | |
| 884 * the sanity checks for free. | |
| 885 */ | |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
886 if (key->type == OSSH_RSA || key->type == OSSH_DSA) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
887 buf_setpos(blobbuf, 0); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
888 type = DROPBEAR_SIGNKEY_ANY; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
889 if (buf_get_priv_key(blobbuf, retkey, &type) |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
890 != DROPBEAR_SUCCESS) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
891 errmsg = "unable to create key structure"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
892 sign_key_free(retkey); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
893 retkey = NULL; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
894 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
895 } |
| 1308 | 896 } |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
897 |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
898 errmsg = NULL; /* no error */ |
| 1308 | 899 retval = retkey; |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
900 |
| 1308 | 901 error: |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
902 if (blobbuf) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
903 buf_burn(blobbuf); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
904 buf_free(blobbuf); |
| 1308 | 905 } |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
906 m_burn(key->keyblob, key->keyblob_size); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
907 m_free(key->keyblob); |
|
1002
97d1e54941fd
When clearing the memory of 'key' in function openssh_read(), only the size
Christian Engelmayer <cengelma@gmx.at>
parents:
991
diff
changeset
|
908 m_burn(key, sizeof(*key)); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
909 m_free(key); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
910 if (errmsg) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
911 fprintf(stderr, "Error: %s\n", errmsg); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
912 } |
| 1308 | 913 return retval; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
914 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
915 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
916 static int openssh_write(const char *filename, sign_key *key, |
|
1459
06d52bcb8094
Pointer parameter could be declared as pointing to const
Francois Perrad <francois.perrad@gadz.org>
parents:
1395
diff
changeset
|
917 const char *passphrase) |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
918 { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
919 buffer * keyblob = NULL; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
920 buffer * extrablob = NULL; /* used for calculated values to write */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
921 unsigned char *outblob = NULL; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
922 int outlen = -9999; |
| 1308 | 923 struct mpint_pos numbers[9]; |
|
991
4f65c867fc99
Fix variables may be uninitialized.
Like Ma <likemartinma@gmail.com>
parents:
935
diff
changeset
|
924 int nnumbers = -1, pos = 0, len = 0, seqlen, i; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
925 char *header = NULL, *footer = NULL; |
| 1308 | 926 char zero[1]; |
| 927 int ret = 0; | |
| 928 FILE *fp; | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
929 |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
930 #if DROPBEAR_RSA |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
931 mp_int dmp1, dmq1, iqmp, tmpval; /* for rsa */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
932 #endif |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
933 |
|
935
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
934 if ( |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
935 #if DROPBEAR_RSA |
|
935
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
936 key->type == DROPBEAR_SIGNKEY_RSA || |
|
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
937 #endif |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
938 #if DROPBEAR_DSS |
|
935
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
939 key->type == DROPBEAR_SIGNKEY_DSS || |
|
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
940 #endif |
|
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
941 0) |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
942 { |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
943 /* |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
944 * Fetch the key blobs. |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
945 */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
946 keyblob = buf_new(3000); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
947 buf_put_priv_key(keyblob, key, key->type); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
948 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
949 buf_setpos(keyblob, 0); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
950 /* skip the "ssh-rsa" or "ssh-dss" header */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
951 buf_incrpos(keyblob, buf_getint(keyblob)); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
952 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
953 /* |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
954 * Find the sequence of integers to be encoded into the OpenSSH |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
955 * key blob, and also decide on the header line. |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
956 */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
957 numbers[0].start = zero; numbers[0].bytes = 1; zero[0] = '\0'; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
958 |
|
1499
2d450c1056e3
options: Complete the transition to numeric toggles (`#if')
Michael Witten <mfwitten@gmail.com>
parents:
1459
diff
changeset
|
959 #if DROPBEAR_RSA |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
960 if (key->type == DROPBEAR_SIGNKEY_RSA) { |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
961 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
962 if (key->rsakey->p == NULL || key->rsakey->q == NULL) { |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
963 fprintf(stderr, "Pre-0.33 Dropbear keys cannot be converted to OpenSSH keys.\n"); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
964 goto error; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
965 } |
|
1306
34e6127ef02e
merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
parents:
1250
diff
changeset
|
966 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
967 /* e */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
968 numbers[2].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
969 numbers[2].start = buf_getptr(keyblob, numbers[2].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
970 buf_incrpos(keyblob, numbers[2].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
971 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
972 /* n */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
973 numbers[1].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
974 numbers[1].start = buf_getptr(keyblob, numbers[1].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
975 buf_incrpos(keyblob, numbers[1].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
976 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
977 /* d */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
978 numbers[3].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
979 numbers[3].start = buf_getptr(keyblob, numbers[3].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
980 buf_incrpos(keyblob, numbers[3].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
981 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
982 /* p */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
983 numbers[4].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
984 numbers[4].start = buf_getptr(keyblob, numbers[4].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
985 buf_incrpos(keyblob, numbers[4].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
986 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
987 /* q */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
988 numbers[5].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
989 numbers[5].start = buf_getptr(keyblob, numbers[5].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
990 buf_incrpos(keyblob, numbers[5].bytes); |
|
1306
34e6127ef02e
merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
parents:
1250
diff
changeset
|
991 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
992 /* now calculate some extra parameters: */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
993 m_mp_init(&tmpval); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
994 m_mp_init(&dmp1); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
995 m_mp_init(&dmq1); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
996 m_mp_init(&iqmp); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
997 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
998 /* dmp1 = d mod (p-1) */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
999 if (mp_sub_d(key->rsakey->p, 1, &tmpval) != MP_OKAY) { |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1000 fprintf(stderr, "Bignum error for p-1\n"); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1001 goto error; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1002 } |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1003 if (mp_mod(key->rsakey->d, &tmpval, &dmp1) != MP_OKAY) { |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1004 fprintf(stderr, "Bignum error for dmp1\n"); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1005 goto error; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1006 } |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1007 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1008 /* dmq1 = d mod (q-1) */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1009 if (mp_sub_d(key->rsakey->q, 1, &tmpval) != MP_OKAY) { |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1010 fprintf(stderr, "Bignum error for q-1\n"); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1011 goto error; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1012 } |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1013 if (mp_mod(key->rsakey->d, &tmpval, &dmq1) != MP_OKAY) { |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1014 fprintf(stderr, "Bignum error for dmq1\n"); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1015 goto error; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1016 } |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1017 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1018 /* iqmp = (q^-1) mod p */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1019 if (mp_invmod(key->rsakey->q, key->rsakey->p, &iqmp) != MP_OKAY) { |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1020 fprintf(stderr, "Bignum error for iqmp\n"); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1021 goto error; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1022 } |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1023 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1024 extrablob = buf_new(2000); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1025 buf_putmpint(extrablob, &dmp1); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1026 buf_putmpint(extrablob, &dmq1); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1027 buf_putmpint(extrablob, &iqmp); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1028 buf_setpos(extrablob, 0); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1029 mp_clear(&dmp1); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1030 mp_clear(&dmq1); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1031 mp_clear(&iqmp); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1032 mp_clear(&tmpval); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1033 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1034 /* dmp1 */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1035 numbers[6].bytes = buf_getint(extrablob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1036 numbers[6].start = buf_getptr(extrablob, numbers[6].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1037 buf_incrpos(extrablob, numbers[6].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1038 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1039 /* dmq1 */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1040 numbers[7].bytes = buf_getint(extrablob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1041 numbers[7].start = buf_getptr(extrablob, numbers[7].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1042 buf_incrpos(extrablob, numbers[7].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1043 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1044 /* iqmp */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1045 numbers[8].bytes = buf_getint(extrablob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1046 numbers[8].start = buf_getptr(extrablob, numbers[8].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1047 buf_incrpos(extrablob, numbers[8].bytes); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1048 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1049 nnumbers = 9; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1050 header = "-----BEGIN RSA PRIVATE KEY-----\n"; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1051 footer = "-----END RSA PRIVATE KEY-----\n"; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1052 } |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1053 #endif /* DROPBEAR_RSA */ |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1054 |
|
1499
2d450c1056e3
options: Complete the transition to numeric toggles (`#if')
Michael Witten <mfwitten@gmail.com>
parents:
1459
diff
changeset
|
1055 #if DROPBEAR_DSS |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1056 if (key->type == DROPBEAR_SIGNKEY_DSS) { |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1057 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1058 /* p */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1059 numbers[1].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1060 numbers[1].start = buf_getptr(keyblob, numbers[1].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1061 buf_incrpos(keyblob, numbers[1].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1062 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1063 /* q */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1064 numbers[2].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1065 numbers[2].start = buf_getptr(keyblob, numbers[2].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1066 buf_incrpos(keyblob, numbers[2].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1067 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1068 /* g */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1069 numbers[3].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1070 numbers[3].start = buf_getptr(keyblob, numbers[3].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1071 buf_incrpos(keyblob, numbers[3].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1072 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1073 /* y */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1074 numbers[4].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1075 numbers[4].start = buf_getptr(keyblob, numbers[4].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1076 buf_incrpos(keyblob, numbers[4].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1077 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1078 /* x */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1079 numbers[5].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1080 numbers[5].start = buf_getptr(keyblob, numbers[5].bytes); |
|
d7d9f1612d51
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1081 buf_incrpos(keyblob, numbers[5].bytes); |
|
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1082 |
|
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1083 nnumbers = 6; |
|
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1084 header = "-----BEGIN DSA PRIVATE KEY-----\n"; |
|
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1085 footer = "-----END DSA PRIVATE KEY-----\n"; |
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1086 } |
|
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1087 #endif /* DROPBEAR_DSS */ |
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1088 |
|
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|
1089 /* |
|
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1090 * Now count up the total size of the ASN.1 encoded integers, |
|
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1091 * so as to determine the length of the containing SEQUENCE. |
|
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1092 */ |
|
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1093 len = 0; |
|
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1094 for (i = 0; i < nnumbers; i++) { |
|
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1095 len += ber_write_id_len(NULL, 2, numbers[i].bytes, 0); |
|
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1096 len += numbers[i].bytes; |
|
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1097 } |
|
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1098 seqlen = len; |
|
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1099 /* Now add on the SEQUENCE header. */ |
|
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1100 len += ber_write_id_len(NULL, 16, seqlen, ASN1_CONSTRUCTED); |
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1101 /* Round up to the cipher block size, ensuring we have at least one |
|
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1102 * byte of padding (see below). */ |
|
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1103 outlen = len; |
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1104 if (passphrase) |
|
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1105 outlen = (outlen+8) &~ 7; |
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1106 |
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1107 /* |
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1108 * Now we know how big outblob needs to be. Allocate it. |
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1109 */ |
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1110 outblob = (unsigned char*)m_malloc(outlen); |
|
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1111 |
|
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1112 /* |
|
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1113 * And write the data into it. |
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1114 */ |
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1115 pos = 0; |
|
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1116 pos += ber_write_id_len(outblob+pos, 16, seqlen, ASN1_CONSTRUCTED); |
|
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1117 for (i = 0; i < nnumbers; i++) { |
|
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1118 pos += ber_write_id_len(outblob+pos, 2, numbers[i].bytes, 0); |
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1119 memcpy(outblob+pos, numbers[i].start, numbers[i].bytes); |
|
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1120 pos += numbers[i].bytes; |
|
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1121 } |
| 857 | 1122 } /* end RSA and DSS handling */ |
|
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1123 |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
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|
1124 #if DROPBEAR_ECDSA |
|
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1125 if (key->type == DROPBEAR_SIGNKEY_ECDSA_NISTP256 |
|
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1126 || key->type == DROPBEAR_SIGNKEY_ECDSA_NISTP384 |
|
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1127 || key->type == DROPBEAR_SIGNKEY_ECDSA_NISTP521) { |
|
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1128 |
|
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|
1129 /* SEC1 V2 appendix c.4 |
|
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1130 ECPrivateKey ::= SEQUENCE { |
|
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1131 version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1), |
|
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|
1132 privateKey OCTET STRING, |
|
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1133 parameters [0] ECDomainParameters {{ SECGCurveNames }} OPTIONAL, |
|
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1134 publicKey [1] BIT STRING OPTIONAL |
|
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1135 } |
|
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1136 */ |
|
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1137 buffer *seq_buf = buf_new(400); |
|
846
b298bb438625
refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
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|
1138 ecc_key **eck = (ecc_key**)signkey_key_ptr(key, key->type); |
|
b298bb438625
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1139 const long curve_size = (*eck)->dp->size; |
|
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1140 int curve_oid_len = 0; |
|
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1141 const void* curve_oid = NULL; |
|
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1142 unsigned long pubkey_size = 2*curve_size+1; |
|
1089
d144a6bece53
Uses k_size as an signed integer
Gaël PORTAY <gael.portay@gmail.com>
parents:
1045
diff
changeset
|
1143 int k_size; |
|
1038
d3925ed45a85
Fix for old compilers, variable declarations at beginning of functions
Thorsten Horstmann <thorsten.horstmann@web.de>
parents:
1002
diff
changeset
|
1144 int err = 0; |
|
1692
1051e4eea25a
Update LibTomMath to 1.2.0 (#84)
Steffen Jaeckel <s@jaeckel.eu>
parents:
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diff
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|
1145 size_t written; |
|
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|
1146 |
|
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1147 /* version. less than 10 bytes */ |
|
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|
1148 buf_incrwritepos(seq_buf, |
|
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1149 ber_write_id_len(buf_getwriteptr(seq_buf, 10), 2, 1, 0)); |
|
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|
1150 buf_putbyte(seq_buf, 1); |
|
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1151 |
|
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1152 /* privateKey */ |
|
1692
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Steffen Jaeckel <s@jaeckel.eu>
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|
1153 k_size = mp_ubin_size((*eck)->k); |
|
867
d2d624c951ca
- Increase buffer size, fixes converting 521bit ECC key
Matt Johnston <matt@ucc.asn.au>
parents:
857
diff
changeset
|
1154 dropbear_assert(k_size <= curve_size); |
|
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|
1155 buf_incrwritepos(seq_buf, |
|
867
d2d624c951ca
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Matt Johnston <matt@ucc.asn.au>
parents:
857
diff
changeset
|
1156 ber_write_id_len(buf_getwriteptr(seq_buf, 10), 4, k_size, 0)); |
|
1692
1051e4eea25a
Update LibTomMath to 1.2.0 (#84)
Steffen Jaeckel <s@jaeckel.eu>
parents:
1674
diff
changeset
|
1157 if (mp_to_ubin((*eck)->k, buf_getwriteptr(seq_buf, k_size), k_size, &written) != MP_OKAY) { |
|
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Steffen Jaeckel <s@jaeckel.eu>
parents:
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diff
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|
1158 dropbear_exit("ECC error"); |
|
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Steffen Jaeckel <s@jaeckel.eu>
parents:
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|
1159 } |
|
1051e4eea25a
Update LibTomMath to 1.2.0 (#84)
Steffen Jaeckel <s@jaeckel.eu>
parents:
1674
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|
1160 buf_incrwritepos(seq_buf, written); |
|
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|
1161 |
|
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|
1162 /* SECGCurveNames */ |
|
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|
1163 switch (key->type) |
|
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|
1164 { |
|
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|
1165 case DROPBEAR_SIGNKEY_ECDSA_NISTP256: |
|
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1166 curve_oid_len = sizeof(OID_SEC256R1_BLOB); |
|
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|
1167 curve_oid = OID_SEC256R1_BLOB; |
|
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|
1168 break; |
|
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|
1169 case DROPBEAR_SIGNKEY_ECDSA_NISTP384: |
|
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1170 curve_oid_len = sizeof(OID_SEC384R1_BLOB); |
|
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|
1171 curve_oid = OID_SEC384R1_BLOB; |
|
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|
1172 break; |
|
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|
1173 case DROPBEAR_SIGNKEY_ECDSA_NISTP521: |
|
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1174 curve_oid_len = sizeof(OID_SEC521R1_BLOB); |
|
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|
1175 curve_oid = OID_SEC521R1_BLOB; |
|
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|
1176 break; |
|
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|
1177 default: |
|
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|
1178 dropbear_exit("Internal error"); |
|
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|
1179 } |
|
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|
1180 |
|
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|
1181 buf_incrwritepos(seq_buf, |
|
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|
1182 ber_write_id_len(buf_getwriteptr(seq_buf, 10), 0, 2+curve_oid_len, 0xa0)); |
| 857 | 1183 /* object == 6 */ |
|
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|
1184 buf_incrwritepos(seq_buf, |
|
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changeset
|
1185 ber_write_id_len(buf_getwriteptr(seq_buf, 10), 6, curve_oid_len, 0)); |
|
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changeset
|
1186 buf_putbytes(seq_buf, curve_oid, curve_oid_len); |
|
4
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|
1187 |
|
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|
1188 buf_incrwritepos(seq_buf, |
|
1638
315fcba6960e
dropbearconvert: keyimport.c: fix BER encoding of secp521r1 keys (#69)
Christian Hohnstädt <christian@hohnstaedt.de>
parents:
1499
diff
changeset
|
1189 ber_write_id_len(buf_getwriteptr(seq_buf, 10), 1, |
|
315fcba6960e
dropbearconvert: keyimport.c: fix BER encoding of secp521r1 keys (#69)
Christian Hohnstädt <christian@hohnstaedt.de>
parents:
1499
diff
changeset
|
1190 (pubkey_size +1 < 128 ? 2 : 3 ) +1 +pubkey_size, 0xa0)); |
|
315fcba6960e
dropbearconvert: keyimport.c: fix BER encoding of secp521r1 keys (#69)
Christian Hohnstädt <christian@hohnstaedt.de>
parents:
1499
diff
changeset
|
1191 |
|
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changeset
|
1192 buf_incrwritepos(seq_buf, |
|
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changeset
|
1193 ber_write_id_len(buf_getwriteptr(seq_buf, 10), 3, 1+pubkey_size, 0)); |
|
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changeset
|
1194 buf_putbyte(seq_buf, 0); |
|
1038
d3925ed45a85
Fix for old compilers, variable declarations at beginning of functions
Thorsten Horstmann <thorsten.horstmann@web.de>
parents:
1002
diff
changeset
|
1195 err = ecc_ansi_x963_export(*eck, buf_getwriteptr(seq_buf, pubkey_size), &pubkey_size); |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1196 if (err != CRYPT_OK) { |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1197 dropbear_exit("ECC error"); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1198 } |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
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diff
changeset
|
1199 buf_incrwritepos(seq_buf, pubkey_size); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1200 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1201 buf_setpos(seq_buf, 0); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1202 |
|
867
d2d624c951ca
- Increase buffer size, fixes converting 521bit ECC key
Matt Johnston <matt@ucc.asn.au>
parents:
857
diff
changeset
|
1203 outblob = (unsigned char*)m_malloc(1000); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1204 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1205 pos = 0; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1206 pos += ber_write_id_len(outblob+pos, 16, seq_buf->len, ASN1_CONSTRUCTED); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1207 memcpy(&outblob[pos], seq_buf->data, seq_buf->len); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1208 pos += seq_buf->len; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1209 len = pos; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1210 outlen = len; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1211 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1212 buf_burn(seq_buf); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1213 buf_free(seq_buf); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1214 seq_buf = NULL; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1215 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1216 header = "-----BEGIN EC PRIVATE KEY-----\n"; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1217 footer = "-----END EC PRIVATE KEY-----\n"; |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1218 } |
|
836
d7d9f1612d51
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parents:
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diff
changeset
|
1219 #endif |
|
4
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1220 |
|
1659
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1221 #if DROPBEAR_ED25519 |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1222 if (key->type == DROPBEAR_SIGNKEY_ED25519) { |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1223 buffer *buf = buf_new(300); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1224 keyblob = buf_new(100); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1225 extrablob = buf_new(200); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
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diff
changeset
|
1226 |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
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diff
changeset
|
1227 /* private key blob w/o header */ |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1228 buf_put_priv_key(keyblob, key, key->type); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1229 buf_setpos(keyblob, 0); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1230 buf_incrpos(keyblob, buf_getint(keyblob)); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1231 len = buf_getint(keyblob); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1232 |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1233 /* header */ |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1234 buf_putbytes(buf, OSSH_PKEY_BLOB, OSSH_PKEY_BLOBLEN); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1235 |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1236 /* public key */ |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1237 buf_put_pub_key(buf, key, key->type); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1238 |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
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diff
changeset
|
1239 /* private key */ |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1240 buf_incrwritepos(extrablob, 4); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1241 buf_put_pub_key(extrablob, key, key->type); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1242 buf_putstring(extrablob, buf_getptr(keyblob, len), len); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1243 /* comment */ |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1244 buf_putstring(extrablob, "", 0); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1245 /* padding to cipher block length */ |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1246 len = (extrablob->len+8) & ~7; |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1247 for (i = 1; len - extrablob->len > 0; i++) |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1248 buf_putbyte(extrablob, i); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1249 buf_setpos(extrablob, 0); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1250 buf_putbytes(extrablob, "\0\0\0\0\0\0\0\0", 8); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1251 buf_putbufstring(buf, extrablob); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1252 |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1253 outlen = len = pos = buf->len; |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1254 outblob = (unsigned char*)m_malloc(outlen); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1255 memcpy(outblob, buf->data, buf->len); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1256 |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1257 buf_burn(buf); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1258 buf_free(buf); |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1259 buf = NULL; |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1260 |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1261 header = "-----BEGIN OPENSSH PRIVATE KEY-----\n"; |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1262 footer = "-----END OPENSSH PRIVATE KEY-----\n"; |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1263 } |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1264 #endif |
|
d32bcb5c557d
Add Ed25519 support (#91)
Vladislav Grishenko <themiron@users.noreply.github.com>
parents:
1638
diff
changeset
|
1265 |
| 1308 | 1266 /* |
| 1267 * Padding on OpenSSH keys is deterministic. The number of | |
| 1268 * padding bytes is always more than zero, and always at most | |
| 1269 * the cipher block length. The value of each padding byte is | |
| 1270 * equal to the number of padding bytes. So a plaintext that's | |
| 1271 * an exact multiple of the block size will be padded with 08 | |
| 1272 * 08 08 08 08 08 08 08 (assuming a 64-bit block cipher); a | |
| 1273 * plaintext one byte less than a multiple of the block size | |
| 1274 * will be padded with just 01. | |
| 1275 * | |
| 1276 * This enables the OpenSSL key decryption function to strip | |
| 1277 * off the padding algorithmically and return the unpadded | |
| 1278 * plaintext to the next layer: it looks at the final byte, and | |
| 1279 * then expects to find that many bytes at the end of the data | |
| 1280 * with the same value. Those are all removed and the rest is | |
| 1281 * returned. | |
| 1282 */ | |
|
241
c5d3ef11155f
* use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents:
87
diff
changeset
|
1283 dropbear_assert(pos == len); |
| 1308 | 1284 while (pos < outlen) { |
| 1285 outblob[pos++] = outlen - len; | |
| 1286 } | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1287 |
| 1308 | 1288 /* |
| 1289 * Encrypt the key. | |
| 1290 */ | |
| 1291 if (passphrase) { | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1292 fprintf(stderr, "Encrypted keys aren't supported currently\n"); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1293 goto error; |
| 1308 | 1294 } |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1295 |
| 1308 | 1296 /* |
| 1297 * And save it. We'll use Unix line endings just in case it's | |
| 1298 * subsequently transferred in binary mode. | |
| 1299 */ | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
1300 if (strlen(filename) == 1 && filename[0] == '-') { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1301 fp = stdout; |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1302 } else { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1303 fp = fopen(filename, "wb"); /* ensure Unix line endings */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1304 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1305 if (!fp) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1306 fprintf(stderr, "Failed opening output file\n"); |
| 1308 | 1307 goto error; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1308 } |
| 1308 | 1309 fputs(header, fp); |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1310 base64_encode_fp(fp, outblob, outlen, 64); |
| 1308 | 1311 fputs(footer, fp); |
| 1312 fclose(fp); | |
| 1313 ret = 1; | |
| 1314 | |
| 1315 error: | |
| 1316 if (outblob) { | |
| 1317 memset(outblob, 0, outlen); | |
| 1318 m_free(outblob); | |
|
4
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parents:
diff
changeset
|
1319 } |
|
fe6bca95afa7
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parents:
diff
changeset
|
1320 if (keyblob) { |
|
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parents:
diff
changeset
|
1321 buf_burn(keyblob); |
|
fe6bca95afa7
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parents:
diff
changeset
|
1322 buf_free(keyblob); |
| 1308 | 1323 } |
|
4
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
1324 if (extrablob) { |
|
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
1325 buf_burn(extrablob); |
|
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
1326 buf_free(extrablob); |
| 1308 | 1327 } |
| 1328 return ret; | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
1329 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1330 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1331 #if 0 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1332 /* XXX TODO ssh.com stuff isn't going yet */ |
|
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
1333 |
|
fe6bca95afa7
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parents:
diff
changeset
|
1334 /* ---------------------------------------------------------------------- |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1335 * Code to read ssh.com private keys. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1336 */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1337 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1338 /* |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1339 * The format of the base64 blob is largely ssh2-packet-formatted, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1340 * except that mpints are a bit different: they're more like the |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1341 * old ssh1 mpint. You have a 32-bit bit count N, followed by |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1342 * (N+7)/8 bytes of data. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1343 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1344 * So. The blob contains: |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1345 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1346 * - uint32 0x3f6ff9eb (magic number) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1347 * - uint32 size (total blob size) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1348 * - string key-type (see below) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1349 * - string cipher-type (tells you if key is encrypted) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1350 * - string encrypted-blob |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1351 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1352 * (The first size field includes the size field itself and the |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1353 * magic number before it. All other size fields are ordinary ssh2 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1354 * strings, so the size field indicates how much data is to |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1355 * _follow_.) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1356 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1357 * The encrypted blob, once decrypted, contains a single string |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1358 * which in turn contains the payload. (This allows padding to be |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1359 * added after that string while still making it clear where the |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1360 * real payload ends. Also it probably makes for a reasonable |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1361 * decryption check.) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1362 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1363 * The payload blob, for an RSA key, contains: |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1364 * - mpint e |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1365 * - mpint d |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1366 * - mpint n (yes, the public and private stuff is intermixed) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1367 * - mpint u (presumably inverse of p mod q) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1368 * - mpint p (p is the smaller prime) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1369 * - mpint q (q is the larger) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1370 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1371 * For a DSA key, the payload blob contains: |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1372 * - uint32 0 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1373 * - mpint p |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1374 * - mpint g |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1375 * - mpint q |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1376 * - mpint y |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1377 * - mpint x |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1378 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1379 * Alternatively, if the parameters are `predefined', that |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1380 * (0,p,g,q) sequence can be replaced by a uint32 1 and a string |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1381 * containing some predefined parameter specification. *shudder*, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1382 * but I doubt we'll encounter this in real life. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1383 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1384 * The key type strings are ghastly. The RSA key I looked at had a |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1385 * type string of |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1386 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1387 * `if-modn{sign{rsa-pkcs1-sha1},encrypt{rsa-pkcs1v2-oaep}}' |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1388 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1389 * and the DSA key wasn't much better: |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1390 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1391 * `dl-modp{sign{dsa-nist-sha1},dh{plain}}' |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1392 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1393 * It isn't clear that these will always be the same. I think it |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1394 * might be wise just to look at the `if-modn{sign{rsa' and |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1395 * `dl-modp{sign{dsa' prefixes. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1396 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1397 * Finally, the encryption. The cipher-type string appears to be |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1398 * either `none' or `3des-cbc'. Looks as if this is SSH2-style |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1399 * 3des-cbc (i.e. outer cbc rather than inner). The key is created |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1400 * from the passphrase by means of yet another hashing faff: |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1401 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1402 * - first 16 bytes are MD5(passphrase) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1403 * - next 16 bytes are MD5(passphrase || first 16 bytes) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1404 * - if there were more, they'd be MD5(passphrase || first 32), |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1405 * and so on. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1406 */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1407 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1408 #define SSHCOM_MAGIC_NUMBER 0x3f6ff9eb |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1409 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1410 struct sshcom_key { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1411 char comment[256]; /* allowing any length is overkill */ |
| 1308 | 1412 unsigned char *keyblob; |
| 1413 int keyblob_len, keyblob_size; | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1414 }; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1415 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1416 static struct sshcom_key *load_sshcom_key(const char *filename) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1417 { |
| 1308 | 1418 struct sshcom_key *ret; |
| 1419 FILE *fp; | |
| 1420 char buffer[256]; | |
| 1421 int len; | |
| 1422 char *errmsg, *p; | |
| 1423 int headers_done; | |
| 1424 char base64_bit[4]; | |
| 1425 int base64_chars = 0; | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1426 |
| 1308 | 1427 ret = snew(struct sshcom_key); |
| 1428 ret->comment[0] = '\0'; | |
| 1429 ret->keyblob = NULL; | |
| 1430 ret->keyblob_len = ret->keyblob_size = 0; | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1431 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1432 fp = fopen(filename, "r"); |
| 1308 | 1433 if (!fp) { |
| 1434 errmsg = "Unable to open key file"; | |
| 1435 goto error; | |
|
1306
34e6127ef02e
merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
parents:
1250
diff
changeset
|
1436 } |
| 1308 | 1437 if (!fgets(buffer, sizeof(buffer), fp) || |
| 1438 0 != strcmp(buffer, "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----\n")) { | |
| 1439 errmsg = "File does not begin with ssh.com key header"; | |
|
1306
34e6127ef02e
merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
parents:
1250
diff
changeset
|
1440 goto error; |
| 1308 | 1441 } |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1442 |
| 1308 | 1443 headers_done = 0; |
| 1444 while (1) { | |
| 1445 if (!fgets(buffer, sizeof(buffer), fp)) { | |
| 1446 errmsg = "Unexpected end of file"; | |
| 1447 goto error; | |
| 1448 } | |
| 1449 if (!strcmp(buffer, "---- END SSH2 ENCRYPTED PRIVATE KEY ----\n")) | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1450 break; /* done */ |
| 1308 | 1451 if ((p = strchr(buffer, ':')) != NULL) { |
| 1452 if (headers_done) { | |
| 1453 errmsg = "Header found in body of key data"; | |
| 1454 goto error; | |
| 1455 } | |
| 1456 *p++ = '\0'; | |
| 1457 while (*p && isspace((unsigned char)*p)) p++; | |
| 1458 /* | |
| 1459 * Header lines can end in a trailing backslash for | |
| 1460 * continuation. | |
| 1461 */ | |
| 1462 while ((len = strlen(p)) > (int)(sizeof(buffer) - (p-buffer) -1) || | |
| 1463 p[len-1] != '\n' || p[len-2] == '\\') { | |
| 1464 if (len > (int)((p-buffer) + sizeof(buffer)-2)) { | |
| 1465 errmsg = "Header line too long to deal with"; | |
| 1466 goto error; | |
| 1467 } | |
| 1468 if (!fgets(p+len-2, sizeof(buffer)-(p-buffer)-(len-2), fp)) { | |
| 1469 errmsg = "Unexpected end of file"; | |
| 1470 goto error; | |
| 1471 } | |
| 1472 } | |
| 1473 p[strcspn(p, "\n")] = '\0'; | |
| 1474 if (!strcmp(buffer, "Comment")) { | |
| 1475 /* Strip quotes in comment if present. */ | |
| 1476 if (p[0] == '"' && p[strlen(p)-1] == '"') { | |
| 1477 p++; | |
| 1478 p[strlen(p)-1] = '\0'; | |
| 1479 } | |
| 1480 strncpy(ret->comment, p, sizeof(ret->comment)); | |
| 1481 ret->comment[sizeof(ret->comment)-1] = '\0'; | |
| 1482 } | |
| 1483 } else { | |
| 1484 headers_done = 1; | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1485 |
| 1308 | 1486 p = buffer; |
| 1487 while (isbase64(*p)) { | |
| 1488 base64_bit[base64_chars++] = *p; | |
| 1489 if (base64_chars == 4) { | |
| 1490 unsigned char out[3]; | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1491 |
| 1308 | 1492 base64_chars = 0; |
| 1493 | |
| 1494 len = base64_decode_atom(base64_bit, out); | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1495 |
| 1308 | 1496 if (len <= 0) { |
| 1497 errmsg = "Invalid base64 encoding"; | |
| 1498 goto error; | |
| 1499 } | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1500 |
| 1308 | 1501 if (ret->keyblob_len + len > ret->keyblob_size) { |
| 1502 ret->keyblob_size = ret->keyblob_len + len + 256; | |
| 1503 ret->keyblob = sresize(ret->keyblob, ret->keyblob_size, | |
| 1504 unsigned char); | |
| 1505 } | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1506 |
| 1308 | 1507 memcpy(ret->keyblob + ret->keyblob_len, out, len); |
| 1508 ret->keyblob_len += len; | |
| 1509 } | |
| 1510 | |
| 1511 p++; | |
| 1512 } | |
| 1513 } | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1514 } |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1515 |
| 1308 | 1516 if (ret->keyblob_len == 0 || !ret->keyblob) { |
| 1517 errmsg = "Key body not present"; | |
| 1518 goto error; | |
| 1519 } | |
|
1306
34e6127ef02e
merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
parents:
1250
diff
changeset
|
1520 |
| 1308 | 1521 return ret; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1522 |
| 1308 | 1523 error: |
| 1524 if (ret) { | |
| 1525 if (ret->keyblob) { | |
| 1526 memset(ret->keyblob, 0, ret->keyblob_size); | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1527 m_free(ret->keyblob); |
| 1308 | 1528 } |
| 1529 memset(ret, 0, sizeof(*ret)); | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1530 m_free(ret); |
| 1308 | 1531 } |
| 1532 return NULL; | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1533 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1534 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1535 int sshcom_encrypted(const char *filename, char **comment) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1536 { |
| 1308 | 1537 struct sshcom_key *key = load_sshcom_key(filename); |
| 1538 int pos, len, answer; | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1539 |
| 1308 | 1540 *comment = NULL; |
| 1541 if (!key) | |
| 1542 return 0; | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1543 |
| 1308 | 1544 /* |
| 1545 * Check magic number. | |
| 1546 */ | |
| 1547 if (GET_32BIT(key->keyblob) != 0x3f6ff9eb) | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1548 return 0; /* key is invalid */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1549 |
| 1308 | 1550 /* |
| 1551 * Find the cipher-type string. | |
| 1552 */ | |
| 1553 answer = 0; | |
| 1554 pos = 8; | |
| 1555 if (key->keyblob_len < pos+4) | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1556 goto done; /* key is far too short */ |
| 1308 | 1557 len = toint(GET_32BIT(key->keyblob + pos)); |
| 1558 if (len < 0 || len > key->keyblob_len - pos - 4) | |
|
4
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changeset
|
1559 goto done; /* key is far too short */ |
| 1308 | 1560 pos += 4 + len; /* skip key type */ |
| 1561 len = toint(GET_32BIT(key->keyblob + pos)); /* find cipher-type length */ | |
| 1562 if (len < 0 || len > key->keyblob_len - pos - 4) | |
|
4
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diff
changeset
|
1563 goto done; /* cipher type string is incomplete */ |
| 1308 | 1564 if (len != 4 || 0 != memcmp(key->keyblob + pos + 4, "none", 4)) |
| 1565 answer = 1; | |
|
4
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diff
changeset
|
1566 |
| 1308 | 1567 done: |
| 1568 *comment = dupstr(key->comment); | |
| 1569 memset(key->keyblob, 0, key->keyblob_size); | |
|
4
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changeset
|
1570 m_free(key->keyblob); |
| 1308 | 1571 memset(key, 0, sizeof(*key)); |
|
4
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|
1572 m_free(key); |
| 1308 | 1573 return answer; |
|
4
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changeset
|
1574 } |
|
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changeset
|
1575 |
|
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changeset
|
1576 static int sshcom_read_mpint(void *data, int len, struct mpint_pos *ret) |
|
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changeset
|
1577 { |
| 1308 | 1578 unsigned bits, bytes; |
| 1579 unsigned char *d = (unsigned char *) data; | |
|
4
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|
1580 |
| 1308 | 1581 if (len < 4) |
| 1582 goto error; | |
| 1583 bits = GET_32BIT(d); | |
|
4
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changeset
|
1584 |
| 1308 | 1585 bytes = (bits + 7) / 8; |
| 1586 if (len < 4+bytes) | |
| 1587 goto error; | |
|
4
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diff
changeset
|
1588 |
| 1308 | 1589 ret->start = d + 4; |
| 1590 ret->bytes = bytes; | |
| 1591 return bytes+4; | |
|
4
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changeset
|
1592 |
| 1308 | 1593 error: |
| 1594 ret->start = NULL; | |
| 1595 ret->bytes = -1; | |
|
4
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|
1596 return len; /* ensure further calls fail as well */ |
|
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|
1597 } |
|
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|
1598 |
|
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|
1599 static int sshcom_put_mpint(void *target, void *data, int len) |
|
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|
1600 { |
| 1308 | 1601 unsigned char *d = (unsigned char *)target; |
| 1602 unsigned char *i = (unsigned char *)data; | |
| 1603 int bits = len * 8 - 1; | |
|
4
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changeset
|
1604 |
| 1308 | 1605 while (bits > 0) { |
| 1606 if (*i & (1 << (bits & 7))) | |
| 1607 break; | |
| 1608 if (!(bits-- & 7)) | |
| 1609 i++, len--; | |
| 1610 } | |
|
4
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
1611 |
| 1308 | 1612 PUT_32BIT(d, bits+1); |
| 1613 memcpy(d+4, i, len); | |
| 1614 return len+4; | |
|
4
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changeset
|
1615 } |
|
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|
1616 |
|
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|
1617 sign_key *sshcom_read(const char *filename, char *passphrase) |
|
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changeset
|
1618 { |
| 1308 | 1619 struct sshcom_key *key = load_sshcom_key(filename); |
| 1620 char *errmsg; | |
| 1621 int pos, len; | |
| 1622 const char prefix_rsa[] = "if-modn{sign{rsa"; | |
| 1623 const char prefix_dsa[] = "dl-modp{sign{dsa"; | |
| 1624 enum { RSA, DSA } type; | |
| 1625 int encrypted; | |
| 1626 char *ciphertext; | |
| 1627 int cipherlen; | |
| 1628 struct ssh2_userkey *ret = NULL, *retkey; | |
| 1629 const struct ssh_signkey *alg; | |
| 1630 unsigned char *blob = NULL; | |
| 1631 int blobsize = 0, publen, privlen; | |
|
1306
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merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
1632 |
| 1308 | 1633 if (!key) |
| 1634 return NULL; | |
|
4
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|
1635 |
| 1308 | 1636 /* |
| 1637 * Check magic number. | |
| 1638 */ | |
| 1639 if (GET_32BIT(key->keyblob) != SSHCOM_MAGIC_NUMBER) { | |
| 1640 errmsg = "Key does not begin with magic number"; | |
| 1641 goto error; | |
| 1642 } | |
|
4
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changeset
|
1643 |
| 1308 | 1644 /* |
| 1645 * Determine the key type. | |
| 1646 */ | |
| 1647 pos = 8; | |
| 1648 if (key->keyblob_len < pos+4 || | |
| 1649 (len = GET_32BIT(key->keyblob + pos)) > key->keyblob_len - pos - 4) { | |
| 1650 errmsg = "Key blob does not contain a key type string"; | |
| 1651 goto error; | |
| 1652 } | |
| 1653 if (len > sizeof(prefix_rsa) - 1 && | |
| 1654 !memcmp(key->keyblob+pos+4, prefix_rsa, sizeof(prefix_rsa) - 1)) { | |
| 1655 type = RSA; | |
| 1656 } else if (len > sizeof(prefix_dsa) - 1 && | |
| 1657 !memcmp(key->keyblob+pos+4, prefix_dsa, sizeof(prefix_dsa) - 1)) { | |
| 1658 type = DSA; | |
| 1659 } else { | |
| 1660 errmsg = "Key is of unknown type"; | |
| 1661 goto error; | |
| 1662 } | |
| 1663 pos += 4+len; | |
|
1306
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diff
changeset
|
1664 |
|
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|
1665 /* |
| 1308 | 1666 * Determine the cipher type. |
|
4
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|
1667 */ |
| 1308 | 1668 if (key->keyblob_len < pos+4 || |
| 1669 (len = GET_32BIT(key->keyblob + pos)) > key->keyblob_len - pos - 4) { | |
| 1670 errmsg = "Key blob does not contain a cipher type string"; | |
| 1671 goto error; | |
| 1672 } | |
| 1673 if (len == 4 && !memcmp(key->keyblob+pos+4, "none", 4)) | |
| 1674 encrypted = 0; | |
| 1675 else if (len == 8 && !memcmp(key->keyblob+pos+4, "3des-cbc", 8)) | |
| 1676 encrypted = 1; | |
| 1677 else { | |
| 1678 errmsg = "Key encryption is of unknown type"; | |
| 1679 goto error; | |
| 1680 } | |
| 1681 pos += 4+len; | |
|
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
1682 |
| 1308 | 1683 /* |
| 1684 * Get hold of the encrypted part of the key. | |
| 1685 */ | |
| 1686 if (key->keyblob_len < pos+4 || | |
| 1687 (len = GET_32BIT(key->keyblob + pos)) > key->keyblob_len - pos - 4) { | |
| 1688 errmsg = "Key blob does not contain actual key data"; | |
| 1689 goto error; | |
| 1690 } | |
| 1691 ciphertext = (char *)key->keyblob + pos + 4; | |
| 1692 cipherlen = len; | |
| 1693 if (cipherlen == 0) { | |
| 1694 errmsg = "Length of key data is zero"; | |
| 1695 goto error; | |
| 1696 } | |
|
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|
1697 |
|
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|
1698 /* |
| 1308 | 1699 * Decrypt it if necessary. |
|
4
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changeset
|
1700 */ |
| 1308 | 1701 if (encrypted) { |
| 1702 /* | |
| 1703 * Derive encryption key from passphrase and iv/salt: | |
| 1704 * | |
| 1705 * - let block A equal MD5(passphrase) | |
| 1706 * - let block B equal MD5(passphrase || A) | |
| 1707 * - block C would be MD5(passphrase || A || B) and so on | |
| 1708 * - encryption key is the first N bytes of A || B | |
| 1709 */ | |
| 1710 struct MD5Context md5c; | |
| 1711 unsigned char keybuf[32], iv[8]; | |
|
4
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changeset
|
1712 |
| 1308 | 1713 if (cipherlen % 8 != 0) { |
| 1714 errmsg = "Encrypted part of key is not a multiple of cipher block" | |
| 1715 " size"; | |
| 1716 goto error; | |
| 1717 } | |
| 1718 | |
| 1719 MD5Init(&md5c); | |
| 1720 MD5Update(&md5c, (unsigned char *)passphrase, strlen(passphrase)); | |
| 1721 MD5Final(keybuf, &md5c); | |
| 1722 | |
| 1723 MD5Init(&md5c); | |
| 1724 MD5Update(&md5c, (unsigned char *)passphrase, strlen(passphrase)); | |
| 1725 MD5Update(&md5c, keybuf, 16); | |
| 1726 MD5Final(keybuf+16, &md5c); | |
|
4
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changeset
|
1727 |
| 1308 | 1728 /* |
| 1729 * Now decrypt the key blob. | |
| 1730 */ | |
| 1731 memset(iv, 0, sizeof(iv)); | |
| 1732 des3_decrypt_pubkey_ossh(keybuf, iv, (unsigned char *)ciphertext, | |
| 1733 cipherlen); | |
| 1734 | |
| 1735 memset(&md5c, 0, sizeof(md5c)); | |
| 1736 memset(keybuf, 0, sizeof(keybuf)); | |
|
4
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changeset
|
1737 |
| 1308 | 1738 /* |
| 1739 * Hereafter we return WRONG_PASSPHRASE for any parsing | |
| 1740 * error. (But only if we've just tried to decrypt it! | |
| 1741 * Returning WRONG_PASSPHRASE for an unencrypted key is | |
| 1742 * automatic doom.) | |
| 1743 */ | |
| 1744 if (encrypted) | |
| 1745 ret = SSH2_WRONG_PASSPHRASE; | |
| 1746 } | |
| 1747 | |
| 1748 /* | |
| 1749 * Strip away the containing string to get to the real meat. | |
| 1750 */ | |
| 1751 len = toint(GET_32BIT(ciphertext)); | |
| 1752 if (len < 0 || len > cipherlen-4) { | |
| 1753 errmsg = "containing string was ill-formed"; | |
| 1754 goto error; | |
| 1755 } | |
| 1756 ciphertext += 4; | |
| 1757 cipherlen = len; | |
|
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changeset
|
1758 |
| 1308 | 1759 /* |
| 1760 * Now we break down into RSA versus DSA. In either case we'll | |
| 1761 * construct public and private blobs in our own format, and | |
| 1762 * end up feeding them to alg->createkey(). | |
| 1763 */ | |
| 1764 blobsize = cipherlen + 256; | |
| 1765 blob = snewn(blobsize, unsigned char); | |
| 1766 privlen = 0; | |
| 1767 if (type == RSA) { | |
| 1768 struct mpint_pos n, e, d, u, p, q; | |
| 1769 int pos = 0; | |
| 1770 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &e); | |
| 1771 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &d); | |
| 1772 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &n); | |
| 1773 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &u); | |
| 1774 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &p); | |
| 1775 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &q); | |
| 1776 if (!q.start) { | |
| 1777 errmsg = "key data did not contain six integers"; | |
| 1778 goto error; | |
| 1779 } | |
|
4
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changeset
|
1780 |
| 1308 | 1781 alg = &ssh_rsa; |
| 1782 pos = 0; | |
| 1783 pos += put_string(blob+pos, "ssh-rsa", 7); | |
| 1784 pos += put_mp(blob+pos, e.start, e.bytes); | |
| 1785 pos += put_mp(blob+pos, n.start, n.bytes); | |
| 1786 publen = pos; | |
| 1787 pos += put_string(blob+pos, d.start, d.bytes); | |
| 1788 pos += put_mp(blob+pos, q.start, q.bytes); | |
| 1789 pos += put_mp(blob+pos, p.start, p.bytes); | |
| 1790 pos += put_mp(blob+pos, u.start, u.bytes); | |
| 1791 privlen = pos - publen; | |
| 1792 } else if (type == DSA) { | |
| 1793 struct mpint_pos p, q, g, x, y; | |
| 1794 int pos = 4; | |
| 1795 if (GET_32BIT(ciphertext) != 0) { | |
| 1796 errmsg = "predefined DSA parameters not supported"; | |
| 1797 goto error; | |
| 1798 } | |
| 1799 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &p); | |
| 1800 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &g); | |
| 1801 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &q); | |
| 1802 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &y); | |
| 1803 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &x); | |
| 1804 if (!x.start) { | |
| 1805 errmsg = "key data did not contain five integers"; | |
| 1806 goto error; | |
| 1807 } | |
|
4
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changeset
|
1808 |
| 1308 | 1809 alg = &ssh_dss; |
| 1810 pos = 0; | |
| 1811 pos += put_string(blob+pos, "ssh-dss", 7); | |
| 1812 pos += put_mp(blob+pos, p.start, p.bytes); | |
| 1813 pos += put_mp(blob+pos, q.start, q.bytes); | |
| 1814 pos += put_mp(blob+pos, g.start, g.bytes); | |
| 1815 pos += put_mp(blob+pos, y.start, y.bytes); | |
| 1816 publen = pos; | |
| 1817 pos += put_mp(blob+pos, x.start, x.bytes); | |
| 1818 privlen = pos - publen; | |
| 1819 } else | |
| 1820 return NULL; | |
| 1821 | |
|
241
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87
diff
changeset
|
1822 dropbear_assert(privlen > 0); /* should have bombed by now if not */ |
|
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changeset
|
1823 |
| 1308 | 1824 retkey = snew(struct ssh2_userkey); |
| 1825 retkey->alg = alg; | |
| 1826 retkey->data = alg->createkey(blob, publen, blob+publen, privlen); | |
| 1827 if (!retkey->data) { | |
|
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changeset
|
1828 m_free(retkey); |
| 1308 | 1829 errmsg = "unable to create key data structure"; |
| 1830 goto error; | |
| 1831 } | |
| 1832 retkey->comment = dupstr(key->comment); | |
|
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changeset
|
1833 |
| 1308 | 1834 errmsg = NULL; /* no error */ |
| 1835 ret = retkey; | |
| 1836 | |
| 1837 error: | |
| 1838 if (blob) { | |
| 1839 memset(blob, 0, blobsize); | |
|
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changeset
|
1840 m_free(blob); |
| 1308 | 1841 } |
| 1842 memset(key->keyblob, 0, key->keyblob_size); | |
|
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changeset
|
1843 m_free(key->keyblob); |
| 1308 | 1844 memset(key, 0, sizeof(*key)); |
|
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changeset
|
1845 m_free(key); |
| 1308 | 1846 return ret; |
|
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changeset
|
1847 } |
|
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|
1848 |
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changeset
|
1849 int sshcom_write(const char *filename, sign_key *key, |
| 1308 | 1850 char *passphrase) |
|
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diff
changeset
|
1851 { |
| 1308 | 1852 unsigned char *pubblob, *privblob; |
| 1853 int publen, privlen; | |
| 1854 unsigned char *outblob; | |
| 1855 int outlen; | |
| 1856 struct mpint_pos numbers[6]; | |
| 1857 int nnumbers, initial_zero, pos, lenpos, i; | |
| 1858 char *type; | |
| 1859 char *ciphertext; | |
| 1860 int cipherlen; | |
| 1861 int ret = 0; | |
| 1862 FILE *fp; | |
|
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changeset
|
1863 |
| 1308 | 1864 /* |
| 1865 * Fetch the key blobs. | |
| 1866 */ | |
| 1867 pubblob = key->alg->public_blob(key->data, &publen); | |
| 1868 privblob = key->alg->private_blob(key->data, &privlen); | |
| 1869 outblob = NULL; | |
|
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changeset
|
1870 |
| 1308 | 1871 /* |
| 1872 * Find the sequence of integers to be encoded into the OpenSSH | |
| 1873 * key blob, and also decide on the header line. | |
| 1874 */ | |
| 1875 if (key->alg == &ssh_rsa) { | |
| 1876 int pos; | |
| 1877 struct mpint_pos n, e, d, p, q, iqmp; | |
|
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changeset
|
1878 |
| 1308 | 1879 pos = 4 + GET_32BIT(pubblob); |
| 1880 pos += ssh2_read_mpint(pubblob+pos, publen-pos, &e); | |
| 1881 pos += ssh2_read_mpint(pubblob+pos, publen-pos, &n); | |
| 1882 pos = 0; | |
| 1883 pos += ssh2_read_mpint(privblob+pos, privlen-pos, &d); | |
| 1884 pos += ssh2_read_mpint(privblob+pos, privlen-pos, &p); | |
| 1885 pos += ssh2_read_mpint(privblob+pos, privlen-pos, &q); | |
| 1886 pos += ssh2_read_mpint(privblob+pos, privlen-pos, &iqmp); | |
|
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|
1887 |
|
241
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changeset
|
1888 dropbear_assert(e.start && iqmp.start); /* can't go wrong */ |
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1889 |
| 1308 | 1890 numbers[0] = e; |
| 1891 numbers[1] = d; | |
| 1892 numbers[2] = n; | |
| 1893 numbers[3] = iqmp; | |
| 1894 numbers[4] = q; | |
| 1895 numbers[5] = p; | |
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1896 |
| 1308 | 1897 nnumbers = 6; |
| 1898 initial_zero = 0; | |
| 1899 type = "if-modn{sign{rsa-pkcs1-sha1},encrypt{rsa-pkcs1v2-oaep}}"; | |
| 1900 } else if (key->alg == &ssh_dss) { | |
| 1901 int pos; | |
| 1902 struct mpint_pos p, q, g, y, x; | |
| 1903 | |
| 1904 pos = 4 + GET_32BIT(pubblob); | |
| 1905 pos += ssh2_read_mpint(pubblob+pos, publen-pos, &p); | |
| 1906 pos += ssh2_read_mpint(pubblob+pos, publen-pos, &q); | |
| 1907 pos += ssh2_read_mpint(pubblob+pos, publen-pos, &g); | |
| 1908 pos += ssh2_read_mpint(pubblob+pos, publen-pos, &y); | |
| 1909 pos = 0; | |
| 1910 pos += ssh2_read_mpint(privblob+pos, privlen-pos, &x); | |
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1911 |
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1912 dropbear_assert(y.start && x.start); /* can't go wrong */ |
| 1308 | 1913 |
| 1914 numbers[0] = p; | |
| 1915 numbers[1] = g; | |
| 1916 numbers[2] = q; | |
| 1917 numbers[3] = y; | |
| 1918 numbers[4] = x; | |
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1919 |
| 1308 | 1920 nnumbers = 5; |
| 1921 initial_zero = 1; | |
| 1922 type = "dl-modp{sign{dsa-nist-sha1},dh{plain}}"; | |
| 1923 } else { | |
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1924 dropbear_assert(0); /* zoinks! */ |
| 1308 | 1925 } |
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1926 |
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1927 /* |
| 1308 | 1928 * Total size of key blob will be somewhere under 512 plus |
| 1929 * combined length of integers. We'll calculate the more | |
| 1930 * precise size as we construct the blob. | |
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1931 */ |
| 1308 | 1932 outlen = 512; |
| 1933 for (i = 0; i < nnumbers; i++) | |
| 1934 outlen += 4 + numbers[i].bytes; | |
| 1935 outblob = snewn(outlen, unsigned char); | |
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1936 |
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1937 /* |
| 1308 | 1938 * Create the unencrypted key blob. |
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1939 */ |
| 1308 | 1940 pos = 0; |
| 1941 PUT_32BIT(outblob+pos, SSHCOM_MAGIC_NUMBER); pos += 4; | |
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1942 pos += 4; /* length field, fill in later */ |
| 1308 | 1943 pos += put_string(outblob+pos, type, strlen(type)); |
| 1944 { | |
| 1945 char *ciphertype = passphrase ? "3des-cbc" : "none"; | |
| 1946 pos += put_string(outblob+pos, ciphertype, strlen(ciphertype)); | |
| 1947 } | |
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1948 lenpos = pos; /* remember this position */ |
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1949 pos += 4; /* encrypted-blob size */ |
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1950 pos += 4; /* encrypted-payload size */ |
| 1308 | 1951 if (initial_zero) { |
| 1952 PUT_32BIT(outblob+pos, 0); | |
| 1953 pos += 4; | |
| 1954 } | |
| 1955 for (i = 0; i < nnumbers; i++) | |
| 1956 pos += sshcom_put_mpint(outblob+pos, | |
| 1957 numbers[i].start, numbers[i].bytes); | |
| 1958 /* Now wrap up the encrypted payload. */ | |
| 1959 PUT_32BIT(outblob+lenpos+4, pos - (lenpos+8)); | |
| 1960 /* Pad encrypted blob to a multiple of cipher block size. */ | |
| 1961 if (passphrase) { | |
| 1962 int padding = -(pos - (lenpos+4)) & 7; | |
| 1963 while (padding--) | |
| 1964 outblob[pos++] = random_byte(); | |
| 1965 } | |
| 1966 ciphertext = (char *)outblob+lenpos+4; | |
| 1967 cipherlen = pos - (lenpos+4); | |
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1968 dropbear_assert(!passphrase || cipherlen % 8 == 0); |
| 1308 | 1969 /* Wrap up the encrypted blob string. */ |
| 1970 PUT_32BIT(outblob+lenpos, cipherlen); | |
| 1971 /* And finally fill in the total length field. */ | |
| 1972 PUT_32BIT(outblob+4, pos); | |
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1973 |
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1974 dropbear_assert(pos < outlen); |
| 1308 | 1975 |
| 1976 /* | |
| 1977 * Encrypt the key. | |
| 1978 */ | |
| 1979 if (passphrase) { | |
| 1980 /* | |
| 1981 * Derive encryption key from passphrase and iv/salt: | |
| 1982 * | |
| 1983 * - let block A equal MD5(passphrase) | |
| 1984 * - let block B equal MD5(passphrase || A) | |
| 1985 * - block C would be MD5(passphrase || A || B) and so on | |
| 1986 * - encryption key is the first N bytes of A || B | |
| 1987 */ | |
| 1988 struct MD5Context md5c; | |
| 1989 unsigned char keybuf[32], iv[8]; | |
| 1990 | |
| 1991 MD5Init(&md5c); | |
| 1992 MD5Update(&md5c, (unsigned char *)passphrase, strlen(passphrase)); | |
| 1993 MD5Final(keybuf, &md5c); | |
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1994 |
| 1308 | 1995 MD5Init(&md5c); |
| 1996 MD5Update(&md5c, (unsigned char *)passphrase, strlen(passphrase)); | |
| 1997 MD5Update(&md5c, keybuf, 16); | |
| 1998 MD5Final(keybuf+16, &md5c); | |
| 1999 | |
| 2000 /* | |
| 2001 * Now decrypt the key blob. | |
| 2002 */ | |
| 2003 memset(iv, 0, sizeof(iv)); | |
| 2004 des3_encrypt_pubkey_ossh(keybuf, iv, (unsigned char *)ciphertext, | |
| 2005 cipherlen); | |
| 2006 | |
| 2007 memset(&md5c, 0, sizeof(md5c)); | |
| 2008 memset(keybuf, 0, sizeof(keybuf)); | |
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2009 } |
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2010 |
| 1308 | 2011 /* |
| 2012 * And save it. We'll use Unix line endings just in case it's | |
| 2013 * subsequently transferred in binary mode. | |
| 2014 */ | |
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2015 fp = fopen(filename, "wb"); /* ensure Unix line endings */ |
| 1308 | 2016 if (!fp) |
| 2017 goto error; | |
| 2018 fputs("---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----\n", fp); | |
| 2019 fprintf(fp, "Comment: \""); | |
| 2020 /* | |
| 2021 * Comment header is broken with backslash-newline if it goes | |
| 2022 * over 70 chars. Although it's surrounded by quotes, it | |
| 2023 * _doesn't_ escape backslashes or quotes within the string. | |
| 2024 * Don't ask me, I didn't design it. | |
| 2025 */ | |
| 2026 { | |
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2027 int slen = 60; /* starts at 60 due to "Comment: " */ |
| 1308 | 2028 char *c = key->comment; |
| 2029 while ((int)strlen(c) > slen) { | |
| 2030 fprintf(fp, "%.*s\\\n", slen, c); | |
| 2031 c += slen; | |
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2032 slen = 70; /* allow 70 chars on subsequent lines */ |
| 1308 | 2033 } |
| 2034 fprintf(fp, "%s\"\n", c); | |
| 2035 } | |
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2036 base64_encode_fp(fp, outblob, pos, 70); |
| 1308 | 2037 fputs("---- END SSH2 ENCRYPTED PRIVATE KEY ----\n", fp); |
| 2038 fclose(fp); | |
| 2039 ret = 1; | |
| 2040 | |
| 2041 error: | |
| 2042 if (outblob) { | |
| 2043 memset(outblob, 0, outlen); | |
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2044 m_free(outblob); |
| 1308 | 2045 } |
| 2046 if (privblob) { | |
| 2047 memset(privblob, 0, privlen); | |
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2048 m_free(privblob); |
| 1308 | 2049 } |
| 2050 if (pubblob) { | |
| 2051 memset(pubblob, 0, publen); | |
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2052 m_free(pubblob); |
| 1308 | 2053 } |
| 2054 return ret; | |
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2055 } |
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2056 #endif /* ssh.com stuff disabled */ |
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2057 |
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2058 /* From PuTTY misc.c */ |
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2059 static int toint(unsigned u) |
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2060 { |
| 1308 | 2061 /* |
| 2062 * Convert an unsigned to an int, without running into the | |
| 2063 * undefined behaviour which happens by the strict C standard if | |
| 2064 * the value overflows. You'd hope that sensible compilers would | |
| 2065 * do the sensible thing in response to a cast, but actually I | |
| 2066 * don't trust modern compilers not to do silly things like | |
| 2067 * assuming that _obviously_ you wouldn't have caused an overflow | |
| 2068 * and so they can elide an 'if (i < 0)' test immediately after | |
| 2069 * the cast. | |
| 2070 * | |
| 2071 * Sensible compilers ought of course to optimise this entire | |
| 2072 * function into 'just return the input value'! | |
| 2073 */ | |
| 2074 if (u <= (unsigned)INT_MAX) | |
| 2075 return (int)u; | |
| 2076 else if (u >= (unsigned)INT_MIN) /* wrap in cast _to_ unsigned is OK */ | |
| 2077 return INT_MIN + (int)(u - (unsigned)INT_MIN); | |
| 2078 else | |
| 2079 return INT_MIN; /* fallback; should never occur on binary machines */ | |
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2080 } |