Mercurial > dropbear
annotate keyimport.c @ 1695:93e738ef0d9d
Avoid oss-fuzz $SANITIZER causing wrong build
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=22608
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Wed, 27 May 2020 20:33:45 +0800 |
| parents | 1051e4eea25a |
| children | 064f5be2fc45 |
| 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; |
|
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132 |
|
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Dropbearkey can now print out pubkey portions
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4
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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) { |
|
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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
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|
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
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4
diff
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|
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"); |
|
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|
173 if (!fp) { |
|
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|
174 ret = 0; |
|
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|
175 goto out; |
|
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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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|
189 } else { |
|
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|
190 ret = 1; |
|
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|
191 } |
|
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|
192 out: |
|
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|
193 buf_free(buf); |
|
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|
194 return ret; |
|
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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:
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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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|
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) |
|
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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; |
|
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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
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|
218 |
| 1250 | 219 while (datalen > 0) { |
|
4
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|
220 n = (datalen < rawcpl ? datalen : rawcpl); |
|
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parents:
diff
changeset
|
221 outlen = sizeof(out); |
|
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parents:
diff
changeset
|
222 base64_encode(data, n, out, &outlen); |
|
fe6bca95afa7
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parents:
diff
changeset
|
223 data += n; |
|
fe6bca95afa7
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parents:
diff
changeset
|
224 datalen -= n; |
|
fe6bca95afa7
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parents:
diff
changeset
|
225 fwrite(out, 1, outlen, fp); |
|
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|
226 fputc('\n', fp); |
| 1250 | 227 } |
|
4
fe6bca95afa7
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|
228 } |
|
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|
229 /* |
|
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|
230 * Read an ASN.1/BER identifier and length pair. |
|
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|
231 * |
|
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parents:
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|
232 * Flags are a combination of the #defines listed below. |
|
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|
233 * |
|
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|
234 * Returns -1 if unsuccessful; otherwise returns the number of |
|
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|
235 * bytes used out of the source data. |
|
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parents:
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|
236 */ |
|
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parents:
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|
237 |
|
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parents:
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|
238 /* ASN.1 tag classes. */ |
|
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parents:
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|
239 #define ASN1_CLASS_UNIVERSAL (0 << 6) |
|
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parents:
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changeset
|
240 #define ASN1_CLASS_APPLICATION (1 << 6) |
|
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parents:
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|
241 #define ASN1_CLASS_CONTEXT_SPECIFIC (2 << 6) |
|
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changeset
|
242 #define ASN1_CLASS_PRIVATE (3 << 6) |
|
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changeset
|
243 #define ASN1_CLASS_MASK (3 << 6) |
|
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|
244 |
|
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parents:
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|
245 /* Primitive versus constructed bit. */ |
|
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parents:
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|
246 #define ASN1_CONSTRUCTED (1 << 5) |
|
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|
247 |
|
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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
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|
252 |
| 1308 | 253 if (sourcelen == 0) |
| 254 return -1; | |
|
4
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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
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parents:
diff
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|
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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|
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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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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|
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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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>
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diff
changeset
|
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); |
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640 buf_incrpos(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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parents:
diff
changeset
|
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 } |