Mercurial > dropbear
annotate keyimport.c @ 1379:616417b27f55 fuzz
fix null pointer crash
| author | Matt Johnston <matt@ucc.asn.au> |
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| date | Fri, 26 May 2017 00:19:53 +0800 |
| parents | 2c9dac2d6707 |
| children | 77c0d57a4410 |
| 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 |
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39 #if DROPBEAR_ECDSA |
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40 static const unsigned char OID_SEC256R1_BLOB[] = {0x2a, 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07}; |
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41 static const unsigned char OID_SEC384R1_BLOB[] = {0x2b, 0x81, 0x04, 0x00, 0x22}; |
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42 static const unsigned char OID_SEC521R1_BLOB[] = {0x2b, 0x81, 0x04, 0x00, 0x23}; |
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43 #endif |
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44 |
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45 #define PUT_32BIT(cp, value) do { \ |
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46 (cp)[3] = (unsigned char)(value); \ |
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47 (cp)[2] = (unsigned char)((value) >> 8); \ |
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48 (cp)[1] = (unsigned char)((value) >> 16); \ |
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49 (cp)[0] = (unsigned char)((value) >> 24); } while (0) |
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50 |
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51 #define GET_32BIT(cp) \ |
| 1308 | 52 (((unsigned long)(unsigned char)(cp)[0] << 24) | \ |
| 53 ((unsigned long)(unsigned char)(cp)[1] << 16) | \ | |
| 54 ((unsigned long)(unsigned char)(cp)[2] << 8) | \ | |
| 55 ((unsigned long)(unsigned char)(cp)[3])) | |
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56 |
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57 static int openssh_encrypted(const char *filename); |
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58 static sign_key *openssh_read(const char *filename, char *passphrase); |
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59 static int openssh_write(const char *filename, sign_key *key, |
| 1308 | 60 char *passphrase); |
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61 |
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62 static int dropbear_write(const char*filename, sign_key * key); |
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63 static sign_key *dropbear_read(const char* filename); |
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64 |
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65 static int toint(unsigned u); |
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66 |
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67 #if 0 |
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68 static int sshcom_encrypted(const char *filename, char **comment); |
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69 static struct ssh2_userkey *sshcom_read(const char *filename, char *passphrase); |
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70 static int sshcom_write(const char *filename, struct ssh2_userkey *key, |
| 1308 | 71 char *passphrase); |
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72 #endif |
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73 |
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74 int import_encrypted(const char* filename, int filetype) { |
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75 |
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76 if (filetype == KEYFILE_OPENSSH) { |
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77 return openssh_encrypted(filename); |
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78 #if 0 |
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79 } else if (filetype == KEYFILE_SSHCOM) { |
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80 return sshcom_encrypted(filename, NULL); |
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81 #endif |
| 1308 | 82 } |
| 83 return 0; | |
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84 } |
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85 |
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86 sign_key *import_read(const char *filename, char *passphrase, int filetype) { |
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87 |
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88 if (filetype == KEYFILE_OPENSSH) { |
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89 return openssh_read(filename, passphrase); |
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90 } else if (filetype == KEYFILE_DROPBEAR) { |
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91 return dropbear_read(filename); |
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92 #if 0 |
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93 } else if (filetype == KEYFILE_SSHCOM) { |
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94 return sshcom_read(filename, passphrase); |
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95 #endif |
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96 } |
| 1308 | 97 return NULL; |
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98 } |
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99 |
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100 int import_write(const char *filename, sign_key *key, char *passphrase, |
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101 int filetype) { |
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102 |
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103 if (filetype == KEYFILE_OPENSSH) { |
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104 return openssh_write(filename, key, passphrase); |
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105 } else if (filetype == KEYFILE_DROPBEAR) { |
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106 return dropbear_write(filename, key); |
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107 #if 0 |
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108 } else if (filetype == KEYFILE_SSHCOM) { |
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109 return sshcom_write(filename, key, passphrase); |
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110 #endif |
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111 } |
| 1308 | 112 return 0; |
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113 } |
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114 |
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115 static sign_key *dropbear_read(const char* filename) { |
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116 |
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117 buffer * buf = NULL; |
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118 sign_key *ret = NULL; |
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119 enum signkey_type type; |
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120 |
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121 buf = buf_new(MAX_PRIVKEY_SIZE); |
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122 if (buf_readfile(buf, filename) == DROPBEAR_FAILURE) { |
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123 goto error; |
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124 } |
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125 |
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126 buf_setpos(buf, 0); |
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127 ret = new_sign_key(); |
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128 |
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129 type = DROPBEAR_SIGNKEY_ANY; |
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130 if (buf_get_priv_key(buf, ret, &type) == DROPBEAR_FAILURE){ |
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|
131 goto error; |
|
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|
132 } |
|
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|
133 buf_free(buf); |
|
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|
134 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
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|
135 ret->type = type; |
|
d7d9f1612d51
writing out openssh ecc keys works
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parents:
807
diff
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|
136 |
|
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|
137 return ret; |
|
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|
138 |
|
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|
139 error: |
|
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|
140 if (buf) { |
|
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|
141 buf_free(buf); |
|
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|
142 } |
|
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|
143 if (ret) { |
|
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|
144 sign_key_free(ret); |
|
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|
145 } |
|
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|
146 return NULL; |
|
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|
147 } |
|
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|
148 |
|
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149 /* returns 0 on fail, 1 on success */ |
|
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150 static int dropbear_write(const char*filename, sign_key * key) { |
|
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151 |
|
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|
152 buffer * buf; |
|
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|
153 FILE*fp; |
|
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154 int len; |
|
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|
155 int ret; |
|
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|
156 |
|
73
0bf5cebe622c
Dropbearkey can now print out pubkey portions
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
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|
157 buf = buf_new(MAX_PRIVKEY_SIZE); |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
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793
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|
158 buf_put_priv_key(buf, key, key->type); |
|
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159 |
|
87
680a0bc9df0a
Some small fixes for unused vars, and old messages
Matt Johnston <matt@ucc.asn.au>
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73
diff
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|
160 fp = fopen(filename, "w"); |
|
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161 if (!fp) { |
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162 ret = 0; |
|
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163 goto out; |
|
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|
164 } |
|
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|
165 |
|
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|
166 buf_setpos(buf, 0); |
|
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|
167 do { |
|
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168 len = fwrite(buf_getptr(buf, buf->len - buf->pos), |
|
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|
169 1, buf->len - buf->pos, fp); |
|
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170 buf_incrpos(buf, len); |
|
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171 } while (len > 0 && buf->len != buf->pos); |
|
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172 |
|
256
ac890087b8c1
* keyimport.c: fclose() the key file to make sure data gets written
Matt Johnston <matt@ucc.asn.au>
parents:
241
diff
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|
173 fclose(fp); |
|
ac890087b8c1
* keyimport.c: fclose() the key file to make sure data gets written
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241
diff
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|
174 |
|
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175 if (buf->pos != buf->len) { |
|
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176 ret = 0; |
|
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|
177 } else { |
|
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178 ret = 1; |
|
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|
179 } |
|
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180 out: |
|
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181 buf_free(buf); |
|
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|
182 return ret; |
|
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|
183 } |
|
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184 |
|
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185 |
|
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|
186 /* ---------------------------------------------------------------------- |
|
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187 * Helper routines. (The base64 ones are defined in sshpubk.c.) |
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|
188 */ |
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189 |
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|
190 #define isbase64(c) ( ((c) >= 'A' && (c) <= 'Z') || \ |
| 1308 | 191 ((c) >= 'a' && (c) <= 'z') || \ |
| 192 ((c) >= '0' && (c) <= '9') || \ | |
| 193 (c) == '+' || (c) == '/' || (c) == '=' \ | |
| 194 ) | |
|
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195 |
|
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196 /* cpl has to be less than 100 */ |
|
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197 static void base64_encode_fp(FILE * fp, unsigned char *data, |
|
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|
198 int datalen, int cpl) |
|
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|
199 { |
|
1094
c45d65392c1a
Fix pointer differ in signess warnings [-Werror=pointer-sign]
Gaël PORTAY <gael.portay@gmail.com>
parents:
1089
diff
changeset
|
200 unsigned char out[100]; |
| 1250 | 201 int n; |
|
4
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|
202 unsigned long outlen; |
|
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|
203 int rawcpl; |
|
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|
204 rawcpl = cpl * 3 / 4; |
|
241
c5d3ef11155f
* use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents:
87
diff
changeset
|
205 dropbear_assert((unsigned int)cpl < sizeof(out)); |
|
4
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|
206 |
| 1250 | 207 while (datalen > 0) { |
|
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|
208 n = (datalen < rawcpl ? datalen : rawcpl); |
|
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|
209 outlen = sizeof(out); |
|
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|
210 base64_encode(data, n, out, &outlen); |
|
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|
211 data += n; |
|
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|
212 datalen -= n; |
|
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|
213 fwrite(out, 1, outlen, fp); |
|
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|
214 fputc('\n', fp); |
| 1250 | 215 } |
|
4
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|
216 } |
|
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|
217 /* |
|
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|
218 * Read an ASN.1/BER identifier and length pair. |
|
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|
219 * |
|
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|
220 * Flags are a combination of the #defines listed below. |
|
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|
221 * |
|
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|
222 * Returns -1 if unsuccessful; otherwise returns the number of |
|
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|
223 * bytes used out of the source data. |
|
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|
224 */ |
|
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|
225 |
|
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|
226 /* ASN.1 tag classes. */ |
|
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|
227 #define ASN1_CLASS_UNIVERSAL (0 << 6) |
|
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|
228 #define ASN1_CLASS_APPLICATION (1 << 6) |
|
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|
229 #define ASN1_CLASS_CONTEXT_SPECIFIC (2 << 6) |
|
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|
230 #define ASN1_CLASS_PRIVATE (3 << 6) |
|
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|
231 #define ASN1_CLASS_MASK (3 << 6) |
|
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|
232 |
|
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parents:
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|
233 /* Primitive versus constructed bit. */ |
|
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|
234 #define ASN1_CONSTRUCTED (1 << 5) |
|
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|
235 |
|
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changeset
|
236 static int ber_read_id_len(void *source, int sourcelen, |
| 1308 | 237 int *id, int *length, int *flags) |
|
4
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|
238 { |
| 1308 | 239 unsigned char *p = (unsigned char *) source; |
|
4
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|
240 |
| 1308 | 241 if (sourcelen == 0) |
| 242 return -1; | |
|
4
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|
243 |
| 1308 | 244 *flags = (*p & 0xE0); |
| 245 if ((*p & 0x1F) == 0x1F) { | |
| 246 *id = 0; | |
| 247 while (*p & 0x80) { | |
| 248 p++, sourcelen--; | |
| 249 if (sourcelen == 0) | |
| 250 return -1; | |
| 251 *id = (*id << 7) | (*p & 0x7F); | |
| 252 } | |
| 253 p++, sourcelen--; | |
| 254 } else { | |
| 255 *id = *p & 0x1F; | |
| 256 p++, sourcelen--; | |
|
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|
257 } |
|
1306
34e6127ef02e
merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
parents:
1250
diff
changeset
|
258 |
| 1308 | 259 if (sourcelen == 0) |
| 260 return -1; | |
|
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|
261 |
| 1308 | 262 if (*p & 0x80) { |
| 263 unsigned len; | |
| 264 int n = *p & 0x7F; | |
| 265 p++, sourcelen--; | |
| 266 if (sourcelen < n) | |
| 267 return -1; | |
| 268 len = 0; | |
| 269 while (n--) | |
| 270 len = (len << 8) | (*p++); | |
| 271 sourcelen -= n; | |
| 272 *length = toint(len); | |
| 273 } else { | |
| 274 *length = *p; | |
| 275 p++, sourcelen--; | |
| 276 } | |
|
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|
277 |
| 1308 | 278 if (*length < 0) { |
| 279 printf("Negative ASN.1 length\n"); | |
| 280 return -1; | |
| 281 } | |
|
1307
ad9c40aca3bc
add length checks for ecc too
Matt Johnston <matt@ucc.asn.au>
parents:
1306
diff
changeset
|
282 |
| 1308 | 283 return p - (unsigned char *) source; |
|
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|
284 } |
|
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|
285 |
|
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|
286 /* |
|
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287 * Write an ASN.1/BER identifier and length pair. Returns the |
|
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288 * number of bytes consumed. Assumes dest contains enough space. |
|
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289 * Will avoid writing anything if dest is NULL, but still return |
|
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290 * amount of space required. |
|
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|
291 */ |
|
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|
292 static int ber_write_id_len(void *dest, int id, int length, int flags) |
|
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293 { |
| 1308 | 294 unsigned char *d = (unsigned char *)dest; |
| 295 int len = 0; | |
|
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|
296 |
| 1308 | 297 if (id <= 30) { |
| 298 /* | |
| 299 * Identifier is one byte. | |
| 300 */ | |
| 301 len++; | |
| 302 if (d) *d++ = id | flags; | |
| 303 } else { | |
| 304 int n; | |
| 305 /* | |
| 306 * Identifier is multiple bytes: the first byte is 11111 | |
| 307 * plus the flags, and subsequent bytes encode the value of | |
| 308 * the identifier, 7 bits at a time, with the top bit of | |
| 309 * each byte 1 except the last one which is 0. | |
| 310 */ | |
| 311 len++; | |
| 312 if (d) *d++ = 0x1F | flags; | |
| 313 for (n = 1; (id >> (7*n)) > 0; n++) | |
|
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314 continue; /* count the bytes */ |
| 1308 | 315 while (n--) { |
| 316 len++; | |
| 317 if (d) *d++ = (n ? 0x80 : 0) | ((id >> (7*n)) & 0x7F); | |
| 318 } | |
|
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319 } |
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320 |
| 1308 | 321 if (length < 128) { |
| 322 /* | |
| 323 * Length is one byte. | |
| 324 */ | |
| 325 len++; | |
| 326 if (d) *d++ = length; | |
| 327 } else { | |
| 328 int n; | |
| 329 /* | |
| 330 * Length is multiple bytes. The first is 0x80 plus the | |
| 331 * number of subsequent bytes, and the subsequent bytes | |
| 332 * encode the actual length. | |
| 333 */ | |
| 334 for (n = 1; (length >> (8*n)) > 0; n++) | |
|
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|
335 continue; /* count the bytes */ |
| 1308 | 336 len++; |
| 337 if (d) *d++ = 0x80 | n; | |
| 338 while (n--) { | |
| 339 len++; | |
| 340 if (d) *d++ = (length >> (8*n)) & 0xFF; | |
| 341 } | |
|
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342 } |
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343 |
| 1308 | 344 return len; |
|
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345 } |
|
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346 |
|
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347 |
|
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348 /* Simple structure to point to an mp-int within a blob. */ |
|
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349 struct mpint_pos { void *start; int bytes; }; |
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350 |
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351 /* ---------------------------------------------------------------------- |
|
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352 * Code to read and write OpenSSH private keys. |
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353 */ |
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354 |
|
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A bit of work on ecdsa for host/auth keys
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|
355 enum { OSSH_DSA, OSSH_RSA, OSSH_EC }; |
|
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356 struct openssh_key { |
| 1308 | 357 int type; |
| 358 int encrypted; | |
| 359 char iv[32]; | |
| 360 unsigned char *keyblob; | |
|
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361 unsigned int keyblob_len, keyblob_size; |
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362 }; |
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363 |
|
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364 static struct openssh_key *load_openssh_key(const char *filename) |
|
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365 { |
| 1308 | 366 struct openssh_key *ret; |
| 340 | 367 FILE *fp = NULL; |
| 1308 | 368 char buffer[256]; |
|
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369 char *errmsg = NULL, *p = NULL; |
| 1308 | 370 int headers_done; |
|
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371 unsigned long len, outlen; |
|
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372 |
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373 ret = (struct openssh_key*)m_malloc(sizeof(struct openssh_key)); |
| 1308 | 374 ret->keyblob = NULL; |
| 375 ret->keyblob_len = ret->keyblob_size = 0; | |
| 376 ret->encrypted = 0; | |
| 377 memset(ret->iv, 0, sizeof(ret->iv)); | |
|
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378 |
|
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379 if (strlen(filename) == 1 && filename[0] == '-') { |
|
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|
380 fp = stdin; |
|
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|
381 } else { |
|
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382 fp = fopen(filename, "r"); |
|
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|
383 } |
| 1308 | 384 if (!fp) { |
| 385 errmsg = "Unable to open key file"; | |
| 386 goto error; | |
|
1306
34e6127ef02e
merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
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1250
diff
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|
387 } |
| 1308 | 388 if (!fgets(buffer, sizeof(buffer), fp) || |
| 389 0 != strncmp(buffer, "-----BEGIN ", 11) || | |
| 390 0 != strcmp(buffer+strlen(buffer)-17, "PRIVATE KEY-----\n")) { | |
| 391 errmsg = "File does not begin with OpenSSH key header"; | |
|
1306
34e6127ef02e
merge fixes from PuTTY import.c
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diff
changeset
|
392 goto error; |
| 1308 | 393 } |
| 394 if (!strcmp(buffer, "-----BEGIN RSA PRIVATE KEY-----\n")) | |
| 395 ret->type = OSSH_RSA; | |
| 396 else if (!strcmp(buffer, "-----BEGIN DSA PRIVATE KEY-----\n")) | |
| 397 ret->type = OSSH_DSA; | |
|
793
70625eed40c9
A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
parents:
491
diff
changeset
|
398 else if (!strcmp(buffer, "-----BEGIN EC PRIVATE KEY-----\n")) |
|
70625eed40c9
A bit of work on ecdsa for host/auth keys
Matt Johnston <matt@ucc.asn.au>
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491
diff
changeset
|
399 ret->type = OSSH_EC; |
| 1308 | 400 else { |
| 401 errmsg = "Unrecognised key type"; | |
| 402 goto error; | |
|
4
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|
403 } |
|
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|
404 |
| 1308 | 405 headers_done = 0; |
| 406 while (1) { | |
| 407 if (!fgets(buffer, sizeof(buffer), fp)) { | |
| 408 errmsg = "Unexpected end of file"; | |
| 409 goto error; | |
| 410 } | |
| 411 if (0 == strncmp(buffer, "-----END ", 9) && | |
| 412 0 == strcmp(buffer+strlen(buffer)-17, "PRIVATE KEY-----\n")) | |
|
4
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|
413 break; /* done */ |
| 1308 | 414 if ((p = strchr(buffer, ':')) != NULL) { |
| 415 if (headers_done) { | |
| 416 errmsg = "Header found in body of key data"; | |
| 417 goto error; | |
| 418 } | |
| 419 *p++ = '\0'; | |
| 420 while (*p && isspace((unsigned char)*p)) p++; | |
| 421 if (!strcmp(buffer, "Proc-Type")) { | |
| 422 if (p[0] != '4' || p[1] != ',') { | |
| 423 errmsg = "Proc-Type is not 4 (only 4 is supported)"; | |
| 424 goto error; | |
| 425 } | |
| 426 p += 2; | |
| 427 if (!strcmp(p, "ENCRYPTED\n")) | |
| 428 ret->encrypted = 1; | |
| 429 } else if (!strcmp(buffer, "DEK-Info")) { | |
| 430 int i, j; | |
|
1306
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merge fixes from PuTTY import.c
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1250
diff
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|
431 |
| 1308 | 432 if (strncmp(p, "DES-EDE3-CBC,", 13)) { |
| 433 errmsg = "Ciphers other than DES-EDE3-CBC not supported"; | |
| 434 goto error; | |
| 435 } | |
| 436 p += 13; | |
| 437 for (i = 0; i < 8; i++) { | |
| 438 if (1 != sscanf(p, "%2x", &j)) | |
| 439 break; | |
| 440 ret->iv[i] = j; | |
| 441 p += 2; | |
| 442 } | |
| 443 if (i < 8) { | |
| 444 errmsg = "Expected 16-digit iv in DEK-Info"; | |
| 445 goto error; | |
| 446 } | |
| 447 } | |
| 448 } else { | |
| 449 headers_done = 1; | |
|
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|
450 len = strlen(buffer); |
|
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|
451 outlen = len*4/3; |
|
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|
452 if (ret->keyblob_len + outlen > ret->keyblob_size) { |
|
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|
453 ret->keyblob_size = ret->keyblob_len + outlen + 256; |
|
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|
454 ret->keyblob = (unsigned char*)m_realloc(ret->keyblob, |
|
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|
455 ret->keyblob_size); |
|
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|
456 } |
|
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|
457 outlen = ret->keyblob_size - ret->keyblob_len; |
|
1094
c45d65392c1a
Fix pointer differ in signess warnings [-Werror=pointer-sign]
Gaël PORTAY <gael.portay@gmail.com>
parents:
1089
diff
changeset
|
458 if (base64_decode((const unsigned char *)buffer, len, |
|
4
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|
459 ret->keyblob + ret->keyblob_len, &outlen) != CRYPT_OK){ |
|
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changeset
|
460 errmsg = "Error decoding base64"; |
|
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parents:
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|
461 goto error; |
|
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parents:
diff
changeset
|
462 } |
|
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diff
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|
463 ret->keyblob_len += outlen; |
| 1308 | 464 } |
|
4
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|
465 } |
| 1308 | 466 |
| 467 if (ret->keyblob_len == 0 || !ret->keyblob) { | |
| 468 errmsg = "Key body not present"; | |
| 469 goto error; | |
| 470 } | |
| 471 | |
| 472 if (ret->encrypted && ret->keyblob_len % 8 != 0) { | |
| 473 errmsg = "Encrypted key blob is not a multiple of cipher block size"; | |
| 474 goto error; | |
| 475 } | |
|
4
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parents:
diff
changeset
|
476 |
|
1045
31727a8abd4b
Use m_burn rather than memset
Thorsten Horstmann <thorsten.horstmann@web.de>
parents:
1038
diff
changeset
|
477 m_burn(buffer, sizeof(buffer)); |
| 1308 | 478 return ret; |
|
4
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parents:
diff
changeset
|
479 |
| 1308 | 480 error: |
|
1045
31727a8abd4b
Use m_burn rather than memset
Thorsten Horstmann <thorsten.horstmann@web.de>
parents:
1038
diff
changeset
|
481 m_burn(buffer, sizeof(buffer)); |
| 1308 | 482 if (ret) { |
| 483 if (ret->keyblob) { | |
|
1045
31727a8abd4b
Use m_burn rather than memset
Thorsten Horstmann <thorsten.horstmann@web.de>
parents:
1038
diff
changeset
|
484 m_burn(ret->keyblob, ret->keyblob_size); |
|
4
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changeset
|
485 m_free(ret->keyblob); |
| 1308 | 486 } |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
487 m_free(ret); |
|
fe6bca95afa7
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parents:
diff
changeset
|
488 } |
| 340 | 489 if (fp) { |
| 490 fclose(fp); | |
| 1308 | 491 } |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
492 if (errmsg) { |
|
fe6bca95afa7
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parents:
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changeset
|
493 fprintf(stderr, "Error: %s\n", errmsg); |
|
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diff
changeset
|
494 } |
| 1308 | 495 return NULL; |
|
4
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parents:
diff
changeset
|
496 } |
|
fe6bca95afa7
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parents:
diff
changeset
|
497 |
|
fe6bca95afa7
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parents:
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changeset
|
498 static int openssh_encrypted(const char *filename) |
|
fe6bca95afa7
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parents:
diff
changeset
|
499 { |
| 1308 | 500 struct openssh_key *key = load_openssh_key(filename); |
| 501 int ret; | |
|
4
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parents:
diff
changeset
|
502 |
| 1308 | 503 if (!key) |
| 504 return 0; | |
| 505 ret = key->encrypted; | |
|
1045
31727a8abd4b
Use m_burn rather than memset
Thorsten Horstmann <thorsten.horstmann@web.de>
parents:
1038
diff
changeset
|
506 m_burn(key->keyblob, key->keyblob_size); |
|
4
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parents:
diff
changeset
|
507 m_free(key->keyblob); |
|
fe6bca95afa7
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changeset
|
508 m_free(key); |
| 1308 | 509 return ret; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
510 } |
|
fe6bca95afa7
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parents:
diff
changeset
|
511 |
|
846
b298bb438625
refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
845
diff
changeset
|
512 static sign_key *openssh_read(const char *filename, char * UNUSED(passphrase)) |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
513 { |
|
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diff
changeset
|
514 struct openssh_key *key; |
| 1308 | 515 unsigned char *p; |
| 516 int ret, id, len, flags; | |
|
4
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changeset
|
517 int i, num_integers = 0; |
|
fe6bca95afa7
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diff
changeset
|
518 sign_key *retval = NULL; |
| 1308 | 519 char *errmsg; |
|
1119
845922d73e9c
Turn modptr local variable into unsigned char *
Gaël PORTAY <gael.portay@gmail.com>
parents:
1094
diff
changeset
|
520 unsigned char *modptr = NULL; |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
521 int modlen = -9999; |
|
846
b298bb438625
refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
845
diff
changeset
|
522 enum signkey_type type; |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
523 |
|
fe6bca95afa7
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parents:
diff
changeset
|
524 sign_key *retkey; |
|
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parents:
diff
changeset
|
525 buffer * blobbuf = NULL; |
|
fe6bca95afa7
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parents:
diff
changeset
|
526 |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
527 retkey = new_sign_key(); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
528 |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
529 key = load_openssh_key(filename); |
|
fe6bca95afa7
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parents:
diff
changeset
|
530 |
| 1308 | 531 if (!key) |
| 532 return NULL; | |
|
4
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parents:
diff
changeset
|
533 |
| 1308 | 534 if (key->encrypted) { |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
535 errmsg = "encrypted keys not supported currently"; |
|
fe6bca95afa7
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parents:
diff
changeset
|
536 goto error; |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
537 #if 0 |
|
fe6bca95afa7
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parents:
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changeset
|
538 /* matt TODO */ |
| 1308 | 539 /* |
| 540 * Derive encryption key from passphrase and iv/salt: | |
| 541 * | |
| 542 * - let block A equal MD5(passphrase || iv) | |
| 543 * - let block B equal MD5(A || passphrase || iv) | |
| 544 * - block C would be MD5(B || passphrase || iv) and so on | |
| 545 * - encryption key is the first N bytes of A || B | |
| 546 */ | |
| 547 struct MD5Context md5c; | |
| 548 unsigned char keybuf[32]; | |
| 549 | |
| 550 MD5Init(&md5c); | |
| 551 MD5Update(&md5c, (unsigned char *)passphrase, strlen(passphrase)); | |
| 552 MD5Update(&md5c, (unsigned char *)key->iv, 8); | |
| 553 MD5Final(keybuf, &md5c); | |
|
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|
554 |
| 1308 | 555 MD5Init(&md5c); |
| 556 MD5Update(&md5c, keybuf, 16); | |
| 557 MD5Update(&md5c, (unsigned char *)passphrase, strlen(passphrase)); | |
| 558 MD5Update(&md5c, (unsigned char *)key->iv, 8); | |
| 559 MD5Final(keybuf+16, &md5c); | |
|
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|
560 |
| 1308 | 561 /* |
| 562 * Now decrypt the key blob. | |
| 563 */ | |
| 564 des3_decrypt_pubkey_ossh(keybuf, (unsigned char *)key->iv, | |
| 565 key->keyblob, key->keyblob_len); | |
| 566 | |
| 567 memset(&md5c, 0, sizeof(md5c)); | |
| 568 memset(keybuf, 0, sizeof(keybuf)); | |
| 569 #endif | |
| 570 } | |
|
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|
571 |
|
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parents:
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|
572 /* |
| 1308 | 573 * Now we have a decrypted key blob, which contains an ASN.1 |
| 574 * encoded private key. We must now untangle the ASN.1. | |
| 575 * | |
| 576 * We expect the whole key blob to be formatted as a SEQUENCE | |
| 577 * (0x30 followed by a length code indicating that the rest of | |
| 578 * the blob is part of the sequence). Within that SEQUENCE we | |
| 579 * expect to see a bunch of INTEGERs. What those integers mean | |
| 580 * depends on the key type: | |
| 581 * | |
| 582 * - For RSA, we expect the integers to be 0, n, e, d, p, q, | |
|
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|
583 * dmp1, dmq1, iqmp in that order. (The last three are d mod |
|
fe6bca95afa7
Makefile.in contains updated files required
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|
584 * (p-1), d mod (q-1), inverse of q mod p respectively.) |
| 1308 | 585 * |
| 586 * - For DSA, we expect them to be 0, p, q, g, y, x in that | |
|
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|
587 * order. |
|
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|
588 */ |
| 1308 | 589 |
| 590 p = key->keyblob; | |
|
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changeset
|
591 |
| 1308 | 592 /* Expect the SEQUENCE header. Take its absence as a failure to decrypt. */ |
| 593 ret = ber_read_id_len(p, key->keyblob_len, &id, &len, &flags); | |
| 594 p += ret; | |
| 595 if (ret < 0 || id != 16 || len < 0 || | |
| 596 key->keyblob+key->keyblob_len-p < len) { | |
| 597 errmsg = "ASN.1 decoding failure"; | |
| 598 goto error; | |
| 599 } | |
|
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34e6127ef02e
merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
600 |
| 1308 | 601 /* Expect a load of INTEGERs. */ |
| 602 if (key->type == OSSH_RSA) | |
| 603 num_integers = 9; | |
| 604 else if (key->type == OSSH_DSA) | |
| 605 num_integers = 6; | |
|
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hackish ECC import code from OpenSSH
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|
606 else if (key->type == OSSH_EC) |
|
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607 num_integers = 1; |
|
4
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|
608 |
| 1308 | 609 /* |
| 610 * Space to create key blob in. | |
| 611 */ | |
|
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|
612 blobbuf = buf_new(3000); |
|
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613 |
|
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Convert #ifdef to #if, other build changes
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changeset
|
614 #if DROPBEAR_DSS |
|
4
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changeset
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615 if (key->type == OSSH_DSA) { |
|
1122
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Merge pull request #13 from gazoo74/fix-warnings
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616 buf_putstring(blobbuf, "ssh-dss", 7); |
|
836
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writing out openssh ecc keys works
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diff
changeset
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617 retkey->type = DROPBEAR_SIGNKEY_DSS; |
|
935
25692c60479e
Fix compiling with ECDSA and DSS disabled
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|
618 } |
|
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Fix compiling with ECDSA and DSS disabled
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|
619 #endif |
|
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620 #if DROPBEAR_RSA |
|
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Fix compiling with ECDSA and DSS disabled
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diff
changeset
|
621 if (key->type == OSSH_RSA) { |
|
1122
aaf576b27a10
Merge pull request #13 from gazoo74/fix-warnings
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parents:
1119
diff
changeset
|
622 buf_putstring(blobbuf, "ssh-rsa", 7); |
|
836
d7d9f1612d51
writing out openssh ecc keys works
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807
diff
changeset
|
623 retkey->type = DROPBEAR_SIGNKEY_RSA; |
|
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624 } |
|
935
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
625 #endif |
|
4
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parents:
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|
626 |
| 1308 | 627 for (i = 0; i < num_integers; i++) { |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
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diff
changeset
|
628 ret = ber_read_id_len(p, key->keyblob+key->keyblob_len-p, |
|
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hackish ECC import code from OpenSSH
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changeset
|
629 &id, &len, &flags); |
|
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hackish ECC import code from OpenSSH
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793
diff
changeset
|
630 p += ret; |
| 1308 | 631 if (ret < 0 || id != 2 || len < 0 || |
|
806
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hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
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793
diff
changeset
|
632 key->keyblob+key->keyblob_len-p < len) { |
|
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hackish ECC import code from OpenSSH
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793
diff
changeset
|
633 errmsg = "ASN.1 decoding failure"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
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793
diff
changeset
|
634 goto error; |
|
71e7d31f7671
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793
diff
changeset
|
635 } |
|
71e7d31f7671
hackish ECC import code from OpenSSH
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793
diff
changeset
|
636 |
| 1308 | 637 if (i == 0) { |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
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793
diff
changeset
|
638 /* First integer is a version indicator */ |
|
991
4f65c867fc99
Fix variables may be uninitialized.
Like Ma <likemartinma@gmail.com>
parents:
935
diff
changeset
|
639 int expected = -1; |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
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parents:
793
diff
changeset
|
640 switch (key->type) { |
|
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hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
641 case OSSH_RSA: |
|
71e7d31f7671
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Matt Johnston <matt@ucc.asn.au>
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793
diff
changeset
|
642 case OSSH_DSA: |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
643 expected = 0; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
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parents:
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diff
changeset
|
644 break; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
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parents:
793
diff
changeset
|
645 case OSSH_EC: |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
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793
diff
changeset
|
646 expected = 1; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
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793
diff
changeset
|
647 break; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
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diff
changeset
|
648 } |
|
71e7d31f7671
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diff
changeset
|
649 if (len != 1 || p[0] != expected) { |
| 1308 | 650 errmsg = "Version number mismatch"; |
| 651 goto error; | |
| 652 } | |
| 653 } else if (key->type == OSSH_RSA) { | |
| 654 /* | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
655 * 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
|
656 * but we want e, n, d, p, q |
| 1308 | 657 */ |
| 658 if (i == 1) { | |
| 659 /* 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
|
660 modptr = p; |
| 1308 | 661 modlen = len; |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
662 } 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
|
663 buf_putstring(blobbuf, (const char*)p, len); |
| 1308 | 664 if (i == 2) { |
|
1122
aaf576b27a10
Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents:
1119
diff
changeset
|
665 buf_putstring(blobbuf, (const char*)modptr, modlen); |
| 1308 | 666 } |
| 667 } | |
| 668 } else if (key->type == OSSH_DSA) { | |
| 669 /* | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
670 * 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
|
671 * we want the same. |
| 1308 | 672 */ |
|
1122
aaf576b27a10
Merge pull request #13 from gazoo74/fix-warnings
Matt Johnston <matt@ucc.asn.au>
parents:
1119
diff
changeset
|
673 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
|
674 } |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
675 |
| 1308 | 676 /* Skip past the number. */ |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
677 p += len; |
| 1308 | 678 } |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
679 |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
680 #if DROPBEAR_ECDSA |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
681 if (key->type == OSSH_EC) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
682 unsigned char* private_key_bytes = NULL; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
683 int private_key_len = 0; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
684 unsigned char* public_key_bytes = NULL; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
685 int public_key_len = 0; |
|
807
75509065db53
have separate ecdsa keys for each size
Matt Johnston <matt@ucc.asn.au>
parents:
806
diff
changeset
|
686 ecc_key *ecc = NULL; |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
687 const struct dropbear_ecc_curve *curve = NULL; |
| 1308 | 688 |
| 857 | 689 /* See SEC1 v2, Appendix C.4 */ |
| 690 /* OpenSSL (so OpenSSH) seems to include the optional parts. */ | |
| 1308 | 691 |
| 857 | 692 /* privateKey OCTET STRING, */ |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
693 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
|
694 &id, &len, &flags); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
695 p += ret; |
| 857 | 696 /* id==4 for octet string */ |
| 1308 | 697 if (ret < 0 || id != 4 || len < 0 || |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
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parents:
793
diff
changeset
|
698 key->keyblob+key->keyblob_len-p < len) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
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parents:
793
diff
changeset
|
699 errmsg = "ASN.1 decoding failure"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
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parents:
793
diff
changeset
|
700 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
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parents:
793
diff
changeset
|
701 } |
|
71e7d31f7671
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parents:
793
diff
changeset
|
702 private_key_bytes = p; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
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parents:
793
diff
changeset
|
703 private_key_len = len; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
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parents:
793
diff
changeset
|
704 p += len; |
| 1308 | 705 |
| 857 | 706 /* parameters [0] ECDomainParameters {{ SECGCurveNames }} OPTIONAL, */ |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
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parents:
793
diff
changeset
|
707 ret = ber_read_id_len(p, key->keyblob+key->keyblob_len-p, |
|
71e7d31f7671
hackish ECC import code from OpenSSH
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parents:
793
diff
changeset
|
708 &id, &len, &flags); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
709 p += ret; |
| 857 | 710 /* id==0 */ |
| 1308 | 711 if (ret < 0 || id != 0 || len < 0) { |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
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parents:
793
diff
changeset
|
712 errmsg = "ASN.1 decoding failure"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
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parents:
793
diff
changeset
|
713 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
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parents:
793
diff
changeset
|
714 } |
| 1308 | 715 |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
716 ret = ber_read_id_len(p, key->keyblob+key->keyblob_len-p, |
|
71e7d31f7671
hackish ECC import code from OpenSSH
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parents:
793
diff
changeset
|
717 &id, &len, &flags); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
718 p += ret; |
| 857 | 719 /* id==6 for object */ |
| 1308 | 720 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
|
721 key->keyblob+key->keyblob_len-p < len) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
722 errmsg = "ASN.1 decoding failure"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
723 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
724 } |
| 1308 | 725 |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
726 if (0) {} |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
727 #if DROPBEAR_ECC_256 |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
728 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
|
729 && memcmp(p, OID_SEC256R1_BLOB, len) == 0) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
730 retkey->type = DROPBEAR_SIGNKEY_ECDSA_NISTP256; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
731 curve = &ecc_curve_nistp256; |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
732 } |
| 1308 | 733 #endif |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
734 #if DROPBEAR_ECC_384 |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
735 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
|
736 && memcmp(p, OID_SEC384R1_BLOB, len) == 0) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
737 retkey->type = DROPBEAR_SIGNKEY_ECDSA_NISTP384; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
738 curve = &ecc_curve_nistp384; |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
739 } |
| 1308 | 740 #endif |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
741 #if DROPBEAR_ECC_521 |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
742 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
|
743 && memcmp(p, OID_SEC521R1_BLOB, len) == 0) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
744 retkey->type = DROPBEAR_SIGNKEY_ECDSA_NISTP521; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
745 curve = &ecc_curve_nistp521; |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
746 } |
| 1308 | 747 #endif |
|
847
f4bb964c8678
Add '-R' for delayed hostkey option
Matt Johnston <matt@ucc.asn.au>
parents:
846
diff
changeset
|
748 else { |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
749 errmsg = "Unknown ECC key type"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
750 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
751 } |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
752 p += len; |
| 1308 | 753 |
| 857 | 754 /* publicKey [1] BIT STRING OPTIONAL */ |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
755 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
|
756 &id, &len, &flags); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
757 p += ret; |
| 857 | 758 /* id==1 */ |
| 1308 | 759 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
|
760 errmsg = "ASN.1 decoding failure"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
761 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
762 } |
| 1308 | 763 |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
764 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
|
765 &id, &len, &flags); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
766 p += ret; |
| 857 | 767 /* id==3 for bit string */ |
| 1308 | 768 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
|
769 key->keyblob+key->keyblob_len-p < len) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
770 errmsg = "ASN.1 decoding failure"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
771 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
772 } |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
773 public_key_bytes = p+1; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
774 public_key_len = len-1; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
775 p += len; |
| 1308 | 776 |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
777 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
|
778 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
|
779 if (!ecc) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
780 errmsg = "Error parsing ECC key"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
781 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
782 } |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
783 m_mp_alloc_init_multi((mp_int**)&ecc->k, NULL); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
784 if (mp_read_unsigned_bin(ecc->k, private_key_bytes, private_key_len) |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
785 != MP_OKAY) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
786 errmsg = "Error parsing ECC key"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
787 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
788 } |
| 1308 | 789 |
|
841
d4ce5269a439
Fix specifying a keysize for key generation, fix key name arguments
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
790 *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
|
791 } |
| 1308 | 792 #endif /* DROPBEAR_ECDSA */ |
| 793 | |
| 794 /* | |
| 795 * Now put together the actual key. Simplest way to do this is | |
| 796 * to assemble our own key blobs and feed them to the createkey | |
| 797 * functions; this is a bit faffy but it does mean we get all | |
| 798 * the sanity checks for free. | |
| 799 */ | |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
800 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
|
801 buf_setpos(blobbuf, 0); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
802 type = DROPBEAR_SIGNKEY_ANY; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
803 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
|
804 != DROPBEAR_SUCCESS) { |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
805 errmsg = "unable to create key structure"; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
806 sign_key_free(retkey); |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
807 retkey = NULL; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
808 goto error; |
|
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
809 } |
| 1308 | 810 } |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
811 |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
812 errmsg = NULL; /* no error */ |
| 1308 | 813 retval = retkey; |
|
806
71e7d31f7671
hackish ECC import code from OpenSSH
Matt Johnston <matt@ucc.asn.au>
parents:
793
diff
changeset
|
814 |
| 1308 | 815 error: |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
816 if (blobbuf) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
817 buf_burn(blobbuf); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
818 buf_free(blobbuf); |
| 1308 | 819 } |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
820 m_burn(key->keyblob, key->keyblob_size); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
821 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
|
822 m_burn(key, sizeof(*key)); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
823 m_free(key); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
824 if (errmsg) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
825 fprintf(stderr, "Error: %s\n", errmsg); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
826 } |
| 1308 | 827 return retval; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
828 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
829 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
830 static int openssh_write(const char *filename, sign_key *key, |
| 1308 | 831 char *passphrase) |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
832 { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
833 buffer * keyblob = NULL; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
834 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
|
835 unsigned char *outblob = NULL; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
836 int outlen = -9999; |
| 1308 | 837 struct mpint_pos numbers[9]; |
|
991
4f65c867fc99
Fix variables may be uninitialized.
Like Ma <likemartinma@gmail.com>
parents:
935
diff
changeset
|
838 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
|
839 char *header = NULL, *footer = NULL; |
| 1308 | 840 char zero[1]; |
| 841 int ret = 0; | |
| 842 FILE *fp; | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
843 |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
844 #if DROPBEAR_RSA |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
845 mp_int dmp1, dmq1, iqmp, tmpval; /* for rsa */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
846 #endif |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
847 |
|
935
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
848 if ( |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
849 #if DROPBEAR_RSA |
|
935
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
850 key->type == DROPBEAR_SIGNKEY_RSA || |
|
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
851 #endif |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
852 #if DROPBEAR_DSS |
|
935
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
853 key->type == DROPBEAR_SIGNKEY_DSS || |
|
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
854 #endif |
|
25692c60479e
Fix compiling with ECDSA and DSS disabled
Matt Johnston <matt@ucc.asn.au>
parents:
867
diff
changeset
|
855 0) |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
856 { |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
857 /* |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
858 * Fetch the key blobs. |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
859 */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
860 keyblob = buf_new(3000); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
861 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
|
862 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
863 buf_setpos(keyblob, 0); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
864 /* 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
|
865 buf_incrpos(keyblob, buf_getint(keyblob)); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
866 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
867 /* |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
868 * 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
|
869 * 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
|
870 */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
871 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
|
872 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
873 #ifdef DROPBEAR_RSA |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
874 if (key->type == DROPBEAR_SIGNKEY_RSA) { |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
875 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
876 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
|
877 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
|
878 goto error; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
879 } |
|
1306
34e6127ef02e
merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
parents:
1250
diff
changeset
|
880 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
881 /* e */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
882 numbers[2].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
883 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
|
884 buf_incrpos(keyblob, numbers[2].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
885 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
886 /* n */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
887 numbers[1].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
888 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
|
889 buf_incrpos(keyblob, numbers[1].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
890 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
891 /* d */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
892 numbers[3].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
893 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
|
894 buf_incrpos(keyblob, numbers[3].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
895 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
896 /* p */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
897 numbers[4].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
898 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
|
899 buf_incrpos(keyblob, numbers[4].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
900 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
901 /* q */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
902 numbers[5].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
903 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
|
904 buf_incrpos(keyblob, numbers[5].bytes); |
|
1306
34e6127ef02e
merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
parents:
1250
diff
changeset
|
905 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
906 /* now calculate some extra parameters: */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
907 m_mp_init(&tmpval); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
908 m_mp_init(&dmp1); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
909 m_mp_init(&dmq1); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
910 m_mp_init(&iqmp); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
911 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
912 /* dmp1 = d mod (p-1) */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
913 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
|
914 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
|
915 goto error; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
916 } |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
917 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
|
918 fprintf(stderr, "Bignum error for dmp1\n"); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
919 goto error; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
920 } |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
921 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
922 /* dmq1 = d mod (q-1) */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
923 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
|
924 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
|
925 goto error; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
926 } |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
927 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
|
928 fprintf(stderr, "Bignum error for dmq1\n"); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
929 goto error; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
930 } |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
931 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
932 /* iqmp = (q^-1) mod p */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
933 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
|
934 fprintf(stderr, "Bignum error for iqmp\n"); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
935 goto error; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
936 } |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
937 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
938 extrablob = buf_new(2000); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
939 buf_putmpint(extrablob, &dmp1); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
940 buf_putmpint(extrablob, &dmq1); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
941 buf_putmpint(extrablob, &iqmp); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
942 buf_setpos(extrablob, 0); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
943 mp_clear(&dmp1); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
944 mp_clear(&dmq1); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
945 mp_clear(&iqmp); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
946 mp_clear(&tmpval); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
947 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
948 /* dmp1 */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
949 numbers[6].bytes = buf_getint(extrablob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
950 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
|
951 buf_incrpos(extrablob, numbers[6].bytes); |
|
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 /* dmq1 */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
954 numbers[7].bytes = buf_getint(extrablob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
955 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
|
956 buf_incrpos(extrablob, numbers[7].bytes); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
957 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
958 /* iqmp */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
959 numbers[8].bytes = buf_getint(extrablob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
960 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
|
961 buf_incrpos(extrablob, numbers[8].bytes); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
962 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
963 nnumbers = 9; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
964 header = "-----BEGIN RSA PRIVATE KEY-----\n"; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
965 footer = "-----END RSA PRIVATE KEY-----\n"; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
966 } |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
967 #endif /* DROPBEAR_RSA */ |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
968 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
969 #ifdef DROPBEAR_DSS |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
970 if (key->type == DROPBEAR_SIGNKEY_DSS) { |
|
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 /* p */ |
|
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 /* q */ |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
978 numbers[2].bytes = buf_getint(keyblob); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
979 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
|
980 buf_incrpos(keyblob, numbers[2].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 /* g */ |
|
d7d9f1612d51
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|
983 numbers[3].bytes = buf_getint(keyblob); |
|
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984 numbers[3].start = buf_getptr(keyblob, numbers[3].bytes); |
|
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985 buf_incrpos(keyblob, numbers[3].bytes); |
|
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|
986 |
|
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|
987 /* y */ |
|
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988 numbers[4].bytes = buf_getint(keyblob); |
|
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989 numbers[4].start = buf_getptr(keyblob, numbers[4].bytes); |
|
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990 buf_incrpos(keyblob, numbers[4].bytes); |
|
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991 |
|
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|
992 /* x */ |
|
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|
993 numbers[5].bytes = buf_getint(keyblob); |
|
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994 numbers[5].start = buf_getptr(keyblob, numbers[5].bytes); |
|
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|
995 buf_incrpos(keyblob, numbers[5].bytes); |
|
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|
996 |
|
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997 nnumbers = 6; |
|
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|
998 header = "-----BEGIN DSA PRIVATE KEY-----\n"; |
|
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999 footer = "-----END DSA PRIVATE KEY-----\n"; |
|
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1000 } |
|
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1001 #endif /* DROPBEAR_DSS */ |
|
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|
1002 |
|
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|
1003 /* |
|
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1004 * Now count up the total size of the ASN.1 encoded integers, |
|
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1005 * so as to determine the length of the containing SEQUENCE. |
|
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|
1006 */ |
|
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|
1007 len = 0; |
|
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1008 for (i = 0; i < nnumbers; i++) { |
|
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1009 len += ber_write_id_len(NULL, 2, numbers[i].bytes, 0); |
|
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1010 len += numbers[i].bytes; |
|
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1011 } |
|
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1012 seqlen = len; |
|
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|
1013 /* Now add on the SEQUENCE header. */ |
|
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1014 len += ber_write_id_len(NULL, 16, seqlen, ASN1_CONSTRUCTED); |
|
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1015 /* Round up to the cipher block size, ensuring we have at least one |
|
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|
1016 * byte of padding (see below). */ |
|
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|
1017 outlen = len; |
|
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|
1018 if (passphrase) |
|
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1019 outlen = (outlen+8) &~ 7; |
|
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|
1020 |
|
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|
1021 /* |
|
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1022 * Now we know how big outblob needs to be. Allocate it. |
|
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|
1023 */ |
|
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1024 outblob = (unsigned char*)m_malloc(outlen); |
|
4
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|
1025 |
|
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|
1026 /* |
|
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1027 * And write the data into it. |
|
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|
1028 */ |
|
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|
1029 pos = 0; |
|
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|
1030 pos += ber_write_id_len(outblob+pos, 16, seqlen, ASN1_CONSTRUCTED); |
|
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|
1031 for (i = 0; i < nnumbers; i++) { |
|
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|
1032 pos += ber_write_id_len(outblob+pos, 2, numbers[i].bytes, 0); |
|
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|
1033 memcpy(outblob+pos, numbers[i].start, numbers[i].bytes); |
|
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|
1034 pos += numbers[i].bytes; |
|
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|
1035 } |
| 857 | 1036 } /* end RSA and DSS handling */ |
|
4
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|
1037 |
|
1295
750ec4ec4cbe
Convert #ifdef to #if, other build changes
Matt Johnston <matt@ucc.asn.au>
parents:
1294
diff
changeset
|
1038 #if DROPBEAR_ECDSA |
|
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1039 if (key->type == DROPBEAR_SIGNKEY_ECDSA_NISTP256 |
|
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|
1040 || key->type == DROPBEAR_SIGNKEY_ECDSA_NISTP384 |
|
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1041 || key->type == DROPBEAR_SIGNKEY_ECDSA_NISTP521) { |
|
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|
1042 |
|
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|
1043 /* SEC1 V2 appendix c.4 |
|
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|
1044 ECPrivateKey ::= SEQUENCE { |
|
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|
1045 version INTEGER { ecPrivkeyVer1(1) } (ecPrivkeyVer1), |
|
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|
1046 privateKey OCTET STRING, |
|
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1047 parameters [0] ECDomainParameters {{ SECGCurveNames }} OPTIONAL, |
|
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|
1048 publicKey [1] BIT STRING OPTIONAL |
|
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1049 } |
|
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|
1050 */ |
|
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|
1051 buffer *seq_buf = buf_new(400); |
|
846
b298bb438625
refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
845
diff
changeset
|
1052 ecc_key **eck = (ecc_key**)signkey_key_ptr(key, key->type); |
|
b298bb438625
refactor key generation, make it generate as required.
Matt Johnston <matt@ucc.asn.au>
parents:
845
diff
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|
1053 const long curve_size = (*eck)->dp->size; |
|
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|
1054 int curve_oid_len = 0; |
|
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|
1055 const void* curve_oid = NULL; |
|
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|
1056 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
|
1057 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
|
1058 int err = 0; |
|
4
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|
1059 |
|
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|
1060 /* version. less than 10 bytes */ |
|
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|
1061 buf_incrwritepos(seq_buf, |
|
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|
1062 ber_write_id_len(buf_getwriteptr(seq_buf, 10), 2, 1, 0)); |
|
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|
1063 buf_putbyte(seq_buf, 1); |
|
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|
1064 |
|
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|
1065 /* privateKey */ |
|
867
d2d624c951ca
- Increase buffer size, fixes converting 521bit ECC key
Matt Johnston <matt@ucc.asn.au>
parents:
857
diff
changeset
|
1066 k_size = mp_unsigned_bin_size((*eck)->k); |
|
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- Increase buffer size, fixes converting 521bit ECC key
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diff
changeset
|
1067 dropbear_assert(k_size <= curve_size); |
|
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|
1068 buf_incrwritepos(seq_buf, |
|
867
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- Increase buffer size, fixes converting 521bit ECC key
Matt Johnston <matt@ucc.asn.au>
parents:
857
diff
changeset
|
1069 ber_write_id_len(buf_getwriteptr(seq_buf, 10), 4, k_size, 0)); |
| 1250 | 1070 mp_to_unsigned_bin((*eck)->k, buf_getwriteptr(seq_buf, k_size)); |
|
867
d2d624c951ca
- Increase buffer size, fixes converting 521bit ECC key
Matt Johnston <matt@ucc.asn.au>
parents:
857
diff
changeset
|
1071 buf_incrwritepos(seq_buf, k_size); |
|
4
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|
1072 |
|
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|
1073 /* SECGCurveNames */ |
|
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|
1074 switch (key->type) |
|
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|
1075 { |
|
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|
1076 case DROPBEAR_SIGNKEY_ECDSA_NISTP256: |
|
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|
1077 curve_oid_len = sizeof(OID_SEC256R1_BLOB); |
|
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|
1078 curve_oid = OID_SEC256R1_BLOB; |
|
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|
1079 break; |
|
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|
1080 case DROPBEAR_SIGNKEY_ECDSA_NISTP384: |
|
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|
1081 curve_oid_len = sizeof(OID_SEC384R1_BLOB); |
|
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|
1082 curve_oid = OID_SEC384R1_BLOB; |
|
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|
1083 break; |
|
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|
1084 case DROPBEAR_SIGNKEY_ECDSA_NISTP521: |
|
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|
1085 curve_oid_len = sizeof(OID_SEC521R1_BLOB); |
|
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|
1086 curve_oid = OID_SEC521R1_BLOB; |
|
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changeset
|
1087 break; |
|
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|
1088 default: |
|
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changeset
|
1089 dropbear_exit("Internal error"); |
|
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|
1090 } |
|
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changeset
|
1091 |
|
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|
1092 buf_incrwritepos(seq_buf, |
|
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changeset
|
1093 ber_write_id_len(buf_getwriteptr(seq_buf, 10), 0, 2+curve_oid_len, 0xa0)); |
| 857 | 1094 /* object == 6 */ |
|
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changeset
|
1095 buf_incrwritepos(seq_buf, |
|
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changeset
|
1096 ber_write_id_len(buf_getwriteptr(seq_buf, 10), 6, curve_oid_len, 0)); |
|
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changeset
|
1097 buf_putbytes(seq_buf, curve_oid, curve_oid_len); |
|
4
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changeset
|
1098 |
|
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changeset
|
1099 buf_incrwritepos(seq_buf, |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1100 ber_write_id_len(buf_getwriteptr(seq_buf, 10), 1, 2+1+pubkey_size, 0xa0)); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1101 buf_incrwritepos(seq_buf, |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1102 ber_write_id_len(buf_getwriteptr(seq_buf, 10), 3, 1+pubkey_size, 0)); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1103 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
|
1104 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
|
1105 if (err != CRYPT_OK) { |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1106 dropbear_exit("ECC error"); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1107 } |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1108 buf_incrwritepos(seq_buf, pubkey_size); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1109 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1110 buf_setpos(seq_buf, 0); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1111 |
|
867
d2d624c951ca
- Increase buffer size, fixes converting 521bit ECC key
Matt Johnston <matt@ucc.asn.au>
parents:
857
diff
changeset
|
1112 outblob = (unsigned char*)m_malloc(1000); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1113 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1114 pos = 0; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1115 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
|
1116 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
|
1117 pos += seq_buf->len; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1118 len = pos; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1119 outlen = len; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1120 |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1121 buf_burn(seq_buf); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1122 buf_free(seq_buf); |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1123 seq_buf = NULL; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1124 |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1125 header = "-----BEGIN EC PRIVATE KEY-----\n"; |
|
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
parents:
807
diff
changeset
|
1126 footer = "-----END EC PRIVATE KEY-----\n"; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1127 } |
|
836
d7d9f1612d51
writing out openssh ecc keys works
Matt Johnston <matt@ucc.asn.au>
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807
diff
changeset
|
1128 #endif |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1129 |
| 1308 | 1130 /* |
| 1131 * Padding on OpenSSH keys is deterministic. The number of | |
| 1132 * padding bytes is always more than zero, and always at most | |
| 1133 * the cipher block length. The value of each padding byte is | |
| 1134 * equal to the number of padding bytes. So a plaintext that's | |
| 1135 * an exact multiple of the block size will be padded with 08 | |
| 1136 * 08 08 08 08 08 08 08 (assuming a 64-bit block cipher); a | |
| 1137 * plaintext one byte less than a multiple of the block size | |
| 1138 * will be padded with just 01. | |
| 1139 * | |
| 1140 * This enables the OpenSSL key decryption function to strip | |
| 1141 * off the padding algorithmically and return the unpadded | |
| 1142 * plaintext to the next layer: it looks at the final byte, and | |
| 1143 * then expects to find that many bytes at the end of the data | |
| 1144 * with the same value. Those are all removed and the rest is | |
| 1145 * returned. | |
| 1146 */ | |
|
241
c5d3ef11155f
* use own assertions which should get logged properly
Matt Johnston <matt@ucc.asn.au>
parents:
87
diff
changeset
|
1147 dropbear_assert(pos == len); |
| 1308 | 1148 while (pos < outlen) { |
| 1149 outblob[pos++] = outlen - len; | |
| 1150 } | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1151 |
| 1308 | 1152 /* |
| 1153 * Encrypt the key. | |
| 1154 */ | |
| 1155 if (passphrase) { | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1156 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
|
1157 goto error; |
| 1308 | 1158 } |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1159 |
| 1308 | 1160 /* |
| 1161 * And save it. We'll use Unix line endings just in case it's | |
| 1162 * subsequently transferred in binary mode. | |
| 1163 */ | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1164 if (strlen(filename) == 1 && filename[0] == '-') { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1165 fp = stdout; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1166 } else { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1167 fp = fopen(filename, "wb"); /* ensure Unix line endings */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1168 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1169 if (!fp) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1170 fprintf(stderr, "Failed opening output file\n"); |
| 1308 | 1171 goto error; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1172 } |
| 1308 | 1173 fputs(header, fp); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1174 base64_encode_fp(fp, outblob, outlen, 64); |
| 1308 | 1175 fputs(footer, fp); |
| 1176 fclose(fp); | |
| 1177 ret = 1; | |
| 1178 | |
| 1179 error: | |
| 1180 if (outblob) { | |
| 1181 memset(outblob, 0, outlen); | |
| 1182 m_free(outblob); | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1183 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1184 if (keyblob) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1185 buf_burn(keyblob); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1186 buf_free(keyblob); |
| 1308 | 1187 } |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1188 if (extrablob) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1189 buf_burn(extrablob); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1190 buf_free(extrablob); |
| 1308 | 1191 } |
| 1192 return ret; | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1193 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1194 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1195 #if 0 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1196 /* XXX TODO ssh.com stuff isn't going yet */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1197 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1198 /* ---------------------------------------------------------------------- |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1199 * Code to read ssh.com private keys. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1200 */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1201 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1202 /* |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1203 * 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
|
1204 * 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
|
1205 * 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
|
1206 * (N+7)/8 bytes of data. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1207 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1208 * So. The blob contains: |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1209 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1210 * - uint32 0x3f6ff9eb (magic number) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1211 * - uint32 size (total blob size) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1212 * - string key-type (see below) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1213 * - 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
|
1214 * - string encrypted-blob |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1215 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1216 * (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
|
1217 * 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
|
1218 * 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
|
1219 * _follow_.) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1220 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1221 * 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
|
1222 * 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
|
1223 * 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
|
1224 * 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
|
1225 * decryption check.) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1226 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1227 * The payload blob, for an RSA key, contains: |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1228 * - mpint e |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1229 * - mpint d |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1230 * - 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
|
1231 * - mpint u (presumably inverse of p mod q) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1232 * - mpint p (p is the smaller prime) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1233 * - mpint q (q is the larger) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1234 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1235 * For a DSA key, the payload blob contains: |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1236 * - uint32 0 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1237 * - mpint p |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1238 * - mpint g |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1239 * - mpint q |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1240 * - mpint y |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1241 * - mpint x |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1242 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1243 * Alternatively, if the parameters are `predefined', that |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1244 * (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
|
1245 * containing some predefined parameter specification. *shudder*, |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1246 * 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
|
1247 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1248 * 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
|
1249 * type string of |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1250 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1251 * `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
|
1252 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1253 * and the DSA key wasn't much better: |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1254 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1255 * `dl-modp{sign{dsa-nist-sha1},dh{plain}}' |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1256 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
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changeset
|
1257 * 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
|
1258 * 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
|
1259 * `dl-modp{sign{dsa' prefixes. |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1260 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1261 * 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
|
1262 * 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
|
1263 * 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
|
1264 * 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
|
1265 * |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1266 * - first 16 bytes are MD5(passphrase) |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1267 * - 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
|
1268 * - 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
|
1269 * and so on. |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1270 */ |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1271 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1272 #define SSHCOM_MAGIC_NUMBER 0x3f6ff9eb |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1273 |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1274 struct sshcom_key { |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1275 char comment[256]; /* allowing any length is overkill */ |
| 1308 | 1276 unsigned char *keyblob; |
| 1277 int keyblob_len, keyblob_size; | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1278 }; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1279 |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1280 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
|
1281 { |
| 1308 | 1282 struct sshcom_key *ret; |
| 1283 FILE *fp; | |
| 1284 char buffer[256]; | |
| 1285 int len; | |
| 1286 char *errmsg, *p; | |
| 1287 int headers_done; | |
| 1288 char base64_bit[4]; | |
| 1289 int base64_chars = 0; | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1290 |
| 1308 | 1291 ret = snew(struct sshcom_key); |
| 1292 ret->comment[0] = '\0'; | |
| 1293 ret->keyblob = NULL; | |
| 1294 ret->keyblob_len = ret->keyblob_size = 0; | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1295 |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1296 fp = fopen(filename, "r"); |
| 1308 | 1297 if (!fp) { |
| 1298 errmsg = "Unable to open key file"; | |
| 1299 goto error; | |
|
1306
34e6127ef02e
merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
parents:
1250
diff
changeset
|
1300 } |
| 1308 | 1301 if (!fgets(buffer, sizeof(buffer), fp) || |
| 1302 0 != strcmp(buffer, "---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----\n")) { | |
| 1303 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
|
1304 goto error; |
| 1308 | 1305 } |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1306 |
| 1308 | 1307 headers_done = 0; |
| 1308 while (1) { | |
| 1309 if (!fgets(buffer, sizeof(buffer), fp)) { | |
| 1310 errmsg = "Unexpected end of file"; | |
| 1311 goto error; | |
| 1312 } | |
| 1313 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
|
1314 break; /* done */ |
| 1308 | 1315 if ((p = strchr(buffer, ':')) != NULL) { |
| 1316 if (headers_done) { | |
| 1317 errmsg = "Header found in body of key data"; | |
| 1318 goto error; | |
| 1319 } | |
| 1320 *p++ = '\0'; | |
| 1321 while (*p && isspace((unsigned char)*p)) p++; | |
| 1322 /* | |
| 1323 * Header lines can end in a trailing backslash for | |
| 1324 * continuation. | |
| 1325 */ | |
| 1326 while ((len = strlen(p)) > (int)(sizeof(buffer) - (p-buffer) -1) || | |
| 1327 p[len-1] != '\n' || p[len-2] == '\\') { | |
| 1328 if (len > (int)((p-buffer) + sizeof(buffer)-2)) { | |
| 1329 errmsg = "Header line too long to deal with"; | |
| 1330 goto error; | |
| 1331 } | |
| 1332 if (!fgets(p+len-2, sizeof(buffer)-(p-buffer)-(len-2), fp)) { | |
| 1333 errmsg = "Unexpected end of file"; | |
| 1334 goto error; | |
| 1335 } | |
| 1336 } | |
| 1337 p[strcspn(p, "\n")] = '\0'; | |
| 1338 if (!strcmp(buffer, "Comment")) { | |
| 1339 /* Strip quotes in comment if present. */ | |
| 1340 if (p[0] == '"' && p[strlen(p)-1] == '"') { | |
| 1341 p++; | |
| 1342 p[strlen(p)-1] = '\0'; | |
| 1343 } | |
| 1344 strncpy(ret->comment, p, sizeof(ret->comment)); | |
| 1345 ret->comment[sizeof(ret->comment)-1] = '\0'; | |
| 1346 } | |
| 1347 } else { | |
| 1348 headers_done = 1; | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1349 |
| 1308 | 1350 p = buffer; |
| 1351 while (isbase64(*p)) { | |
| 1352 base64_bit[base64_chars++] = *p; | |
| 1353 if (base64_chars == 4) { | |
| 1354 unsigned char out[3]; | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1355 |
| 1308 | 1356 base64_chars = 0; |
| 1357 | |
| 1358 len = base64_decode_atom(base64_bit, out); | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1359 |
| 1308 | 1360 if (len <= 0) { |
| 1361 errmsg = "Invalid base64 encoding"; | |
| 1362 goto error; | |
| 1363 } | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1364 |
| 1308 | 1365 if (ret->keyblob_len + len > ret->keyblob_size) { |
| 1366 ret->keyblob_size = ret->keyblob_len + len + 256; | |
| 1367 ret->keyblob = sresize(ret->keyblob, ret->keyblob_size, | |
| 1368 unsigned char); | |
| 1369 } | |
|
4
fe6bca95afa7
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diff
changeset
|
1370 |
| 1308 | 1371 memcpy(ret->keyblob + ret->keyblob_len, out, len); |
| 1372 ret->keyblob_len += len; | |
| 1373 } | |
| 1374 | |
| 1375 p++; | |
| 1376 } | |
| 1377 } | |
|
4
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changeset
|
1378 } |
|
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parents:
diff
changeset
|
1379 |
| 1308 | 1380 if (ret->keyblob_len == 0 || !ret->keyblob) { |
| 1381 errmsg = "Key body not present"; | |
| 1382 goto error; | |
| 1383 } | |
|
1306
34e6127ef02e
merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
parents:
1250
diff
changeset
|
1384 |
| 1308 | 1385 return ret; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
1386 |
| 1308 | 1387 error: |
| 1388 if (ret) { | |
| 1389 if (ret->keyblob) { | |
| 1390 memset(ret->keyblob, 0, ret->keyblob_size); | |
|
4
fe6bca95afa7
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diff
changeset
|
1391 m_free(ret->keyblob); |
| 1308 | 1392 } |
| 1393 memset(ret, 0, sizeof(*ret)); | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1394 m_free(ret); |
| 1308 | 1395 } |
| 1396 return NULL; | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
1397 } |
|
fe6bca95afa7
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changeset
|
1398 |
|
fe6bca95afa7
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diff
changeset
|
1399 int sshcom_encrypted(const char *filename, char **comment) |
|
fe6bca95afa7
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parents:
diff
changeset
|
1400 { |
| 1308 | 1401 struct sshcom_key *key = load_sshcom_key(filename); |
| 1402 int pos, len, answer; | |
|
4
fe6bca95afa7
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diff
changeset
|
1403 |
| 1308 | 1404 *comment = NULL; |
| 1405 if (!key) | |
| 1406 return 0; | |
|
4
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
1407 |
| 1308 | 1408 /* |
| 1409 * Check magic number. | |
| 1410 */ | |
| 1411 if (GET_32BIT(key->keyblob) != 0x3f6ff9eb) | |
|
4
fe6bca95afa7
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diff
changeset
|
1412 return 0; /* key is invalid */ |
|
fe6bca95afa7
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parents:
diff
changeset
|
1413 |
| 1308 | 1414 /* |
| 1415 * Find the cipher-type string. | |
| 1416 */ | |
| 1417 answer = 0; | |
| 1418 pos = 8; | |
| 1419 if (key->keyblob_len < pos+4) | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1420 goto done; /* key is far too short */ |
| 1308 | 1421 len = toint(GET_32BIT(key->keyblob + pos)); |
| 1422 if (len < 0 || len > key->keyblob_len - pos - 4) | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1423 goto done; /* key is far too short */ |
| 1308 | 1424 pos += 4 + len; /* skip key type */ |
| 1425 len = toint(GET_32BIT(key->keyblob + pos)); /* find cipher-type length */ | |
| 1426 if (len < 0 || len > key->keyblob_len - pos - 4) | |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
1427 goto done; /* cipher type string is incomplete */ |
| 1308 | 1428 if (len != 4 || 0 != memcmp(key->keyblob + pos + 4, "none", 4)) |
| 1429 answer = 1; | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1430 |
| 1308 | 1431 done: |
| 1432 *comment = dupstr(key->comment); | |
| 1433 memset(key->keyblob, 0, key->keyblob_size); | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1434 m_free(key->keyblob); |
| 1308 | 1435 memset(key, 0, sizeof(*key)); |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1436 m_free(key); |
| 1308 | 1437 return answer; |
|
4
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
1438 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
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changeset
|
1439 |
|
fe6bca95afa7
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diff
changeset
|
1440 static int sshcom_read_mpint(void *data, int len, struct mpint_pos *ret) |
|
fe6bca95afa7
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parents:
diff
changeset
|
1441 { |
| 1308 | 1442 unsigned bits, bytes; |
| 1443 unsigned char *d = (unsigned char *) data; | |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
1444 |
| 1308 | 1445 if (len < 4) |
| 1446 goto error; | |
| 1447 bits = GET_32BIT(d); | |
|
4
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parents:
diff
changeset
|
1448 |
| 1308 | 1449 bytes = (bits + 7) / 8; |
| 1450 if (len < 4+bytes) | |
| 1451 goto error; | |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
1452 |
| 1308 | 1453 ret->start = d + 4; |
| 1454 ret->bytes = bytes; | |
| 1455 return bytes+4; | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
1456 |
| 1308 | 1457 error: |
| 1458 ret->start = NULL; | |
| 1459 ret->bytes = -1; | |
|
4
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parents:
diff
changeset
|
1460 return len; /* ensure further calls fail as well */ |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
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diff
changeset
|
1461 } |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1462 |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1463 static int sshcom_put_mpint(void *target, void *data, int len) |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1464 { |
| 1308 | 1465 unsigned char *d = (unsigned char *)target; |
| 1466 unsigned char *i = (unsigned char *)data; | |
| 1467 int bits = len * 8 - 1; | |
|
4
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parents:
diff
changeset
|
1468 |
| 1308 | 1469 while (bits > 0) { |
| 1470 if (*i & (1 << (bits & 7))) | |
| 1471 break; | |
| 1472 if (!(bits-- & 7)) | |
| 1473 i++, len--; | |
| 1474 } | |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
1475 |
| 1308 | 1476 PUT_32BIT(d, bits+1); |
| 1477 memcpy(d+4, i, len); | |
| 1478 return len+4; | |
|
4
fe6bca95afa7
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parents:
diff
changeset
|
1479 } |
|
fe6bca95afa7
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parents:
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changeset
|
1480 |
|
fe6bca95afa7
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diff
changeset
|
1481 sign_key *sshcom_read(const char *filename, char *passphrase) |
|
fe6bca95afa7
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parents:
diff
changeset
|
1482 { |
| 1308 | 1483 struct sshcom_key *key = load_sshcom_key(filename); |
| 1484 char *errmsg; | |
| 1485 int pos, len; | |
| 1486 const char prefix_rsa[] = "if-modn{sign{rsa"; | |
| 1487 const char prefix_dsa[] = "dl-modp{sign{dsa"; | |
| 1488 enum { RSA, DSA } type; | |
| 1489 int encrypted; | |
| 1490 char *ciphertext; | |
| 1491 int cipherlen; | |
| 1492 struct ssh2_userkey *ret = NULL, *retkey; | |
| 1493 const struct ssh_signkey *alg; | |
| 1494 unsigned char *blob = NULL; | |
| 1495 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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1250
diff
changeset
|
1496 |
| 1308 | 1497 if (!key) |
| 1498 return NULL; | |
|
4
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parents:
diff
changeset
|
1499 |
| 1308 | 1500 /* |
| 1501 * Check magic number. | |
| 1502 */ | |
| 1503 if (GET_32BIT(key->keyblob) != SSHCOM_MAGIC_NUMBER) { | |
| 1504 errmsg = "Key does not begin with magic number"; | |
| 1505 goto error; | |
| 1506 } | |
|
4
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
1507 |
| 1308 | 1508 /* |
| 1509 * Determine the key type. | |
| 1510 */ | |
| 1511 pos = 8; | |
| 1512 if (key->keyblob_len < pos+4 || | |
| 1513 (len = GET_32BIT(key->keyblob + pos)) > key->keyblob_len - pos - 4) { | |
| 1514 errmsg = "Key blob does not contain a key type string"; | |
| 1515 goto error; | |
| 1516 } | |
| 1517 if (len > sizeof(prefix_rsa) - 1 && | |
| 1518 !memcmp(key->keyblob+pos+4, prefix_rsa, sizeof(prefix_rsa) - 1)) { | |
| 1519 type = RSA; | |
| 1520 } else if (len > sizeof(prefix_dsa) - 1 && | |
| 1521 !memcmp(key->keyblob+pos+4, prefix_dsa, sizeof(prefix_dsa) - 1)) { | |
| 1522 type = DSA; | |
| 1523 } else { | |
| 1524 errmsg = "Key is of unknown type"; | |
| 1525 goto error; | |
| 1526 } | |
| 1527 pos += 4+len; | |
|
1306
34e6127ef02e
merge fixes from PuTTY import.c
Matt Johnston <matt@ucc.asn.au>
parents:
1250
diff
changeset
|
1528 |
|
4
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parents:
diff
changeset
|
1529 /* |
| 1308 | 1530 * Determine the cipher type. |
|
4
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|
1531 */ |
| 1308 | 1532 if (key->keyblob_len < pos+4 || |
| 1533 (len = GET_32BIT(key->keyblob + pos)) > key->keyblob_len - pos - 4) { | |
| 1534 errmsg = "Key blob does not contain a cipher type string"; | |
| 1535 goto error; | |
| 1536 } | |
| 1537 if (len == 4 && !memcmp(key->keyblob+pos+4, "none", 4)) | |
| 1538 encrypted = 0; | |
| 1539 else if (len == 8 && !memcmp(key->keyblob+pos+4, "3des-cbc", 8)) | |
| 1540 encrypted = 1; | |
| 1541 else { | |
| 1542 errmsg = "Key encryption is of unknown type"; | |
| 1543 goto error; | |
| 1544 } | |
| 1545 pos += 4+len; | |
|
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1546 |
| 1308 | 1547 /* |
| 1548 * Get hold of the encrypted part of the key. | |
| 1549 */ | |
| 1550 if (key->keyblob_len < pos+4 || | |
| 1551 (len = GET_32BIT(key->keyblob + pos)) > key->keyblob_len - pos - 4) { | |
| 1552 errmsg = "Key blob does not contain actual key data"; | |
| 1553 goto error; | |
| 1554 } | |
| 1555 ciphertext = (char *)key->keyblob + pos + 4; | |
| 1556 cipherlen = len; | |
| 1557 if (cipherlen == 0) { | |
| 1558 errmsg = "Length of key data is zero"; | |
| 1559 goto error; | |
| 1560 } | |
|
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|
1561 |
|
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|
1562 /* |
| 1308 | 1563 * Decrypt it if necessary. |
|
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|
1564 */ |
| 1308 | 1565 if (encrypted) { |
| 1566 /* | |
| 1567 * Derive encryption key from passphrase and iv/salt: | |
| 1568 * | |
| 1569 * - let block A equal MD5(passphrase) | |
| 1570 * - let block B equal MD5(passphrase || A) | |
| 1571 * - block C would be MD5(passphrase || A || B) and so on | |
| 1572 * - encryption key is the first N bytes of A || B | |
| 1573 */ | |
| 1574 struct MD5Context md5c; | |
| 1575 unsigned char keybuf[32], iv[8]; | |
|
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|
1576 |
| 1308 | 1577 if (cipherlen % 8 != 0) { |
| 1578 errmsg = "Encrypted part of key is not a multiple of cipher block" | |
| 1579 " size"; | |
| 1580 goto error; | |
| 1581 } | |
| 1582 | |
| 1583 MD5Init(&md5c); | |
| 1584 MD5Update(&md5c, (unsigned char *)passphrase, strlen(passphrase)); | |
| 1585 MD5Final(keybuf, &md5c); | |
| 1586 | |
| 1587 MD5Init(&md5c); | |
| 1588 MD5Update(&md5c, (unsigned char *)passphrase, strlen(passphrase)); | |
| 1589 MD5Update(&md5c, keybuf, 16); | |
| 1590 MD5Final(keybuf+16, &md5c); | |
|
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|
1591 |
| 1308 | 1592 /* |
| 1593 * Now decrypt the key blob. | |
| 1594 */ | |
| 1595 memset(iv, 0, sizeof(iv)); | |
| 1596 des3_decrypt_pubkey_ossh(keybuf, iv, (unsigned char *)ciphertext, | |
| 1597 cipherlen); | |
| 1598 | |
| 1599 memset(&md5c, 0, sizeof(md5c)); | |
| 1600 memset(keybuf, 0, sizeof(keybuf)); | |
|
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1601 |
| 1308 | 1602 /* |
| 1603 * Hereafter we return WRONG_PASSPHRASE for any parsing | |
| 1604 * error. (But only if we've just tried to decrypt it! | |
| 1605 * Returning WRONG_PASSPHRASE for an unencrypted key is | |
| 1606 * automatic doom.) | |
| 1607 */ | |
| 1608 if (encrypted) | |
| 1609 ret = SSH2_WRONG_PASSPHRASE; | |
| 1610 } | |
| 1611 | |
| 1612 /* | |
| 1613 * Strip away the containing string to get to the real meat. | |
| 1614 */ | |
| 1615 len = toint(GET_32BIT(ciphertext)); | |
| 1616 if (len < 0 || len > cipherlen-4) { | |
| 1617 errmsg = "containing string was ill-formed"; | |
| 1618 goto error; | |
| 1619 } | |
| 1620 ciphertext += 4; | |
| 1621 cipherlen = len; | |
|
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|
1622 |
| 1308 | 1623 /* |
| 1624 * Now we break down into RSA versus DSA. In either case we'll | |
| 1625 * construct public and private blobs in our own format, and | |
| 1626 * end up feeding them to alg->createkey(). | |
| 1627 */ | |
| 1628 blobsize = cipherlen + 256; | |
| 1629 blob = snewn(blobsize, unsigned char); | |
| 1630 privlen = 0; | |
| 1631 if (type == RSA) { | |
| 1632 struct mpint_pos n, e, d, u, p, q; | |
| 1633 int pos = 0; | |
| 1634 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &e); | |
| 1635 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &d); | |
| 1636 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &n); | |
| 1637 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &u); | |
| 1638 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &p); | |
| 1639 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &q); | |
| 1640 if (!q.start) { | |
| 1641 errmsg = "key data did not contain six integers"; | |
| 1642 goto error; | |
| 1643 } | |
|
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|
1644 |
| 1308 | 1645 alg = &ssh_rsa; |
| 1646 pos = 0; | |
| 1647 pos += put_string(blob+pos, "ssh-rsa", 7); | |
| 1648 pos += put_mp(blob+pos, e.start, e.bytes); | |
| 1649 pos += put_mp(blob+pos, n.start, n.bytes); | |
| 1650 publen = pos; | |
| 1651 pos += put_string(blob+pos, d.start, d.bytes); | |
| 1652 pos += put_mp(blob+pos, q.start, q.bytes); | |
| 1653 pos += put_mp(blob+pos, p.start, p.bytes); | |
| 1654 pos += put_mp(blob+pos, u.start, u.bytes); | |
| 1655 privlen = pos - publen; | |
| 1656 } else if (type == DSA) { | |
| 1657 struct mpint_pos p, q, g, x, y; | |
| 1658 int pos = 4; | |
| 1659 if (GET_32BIT(ciphertext) != 0) { | |
| 1660 errmsg = "predefined DSA parameters not supported"; | |
| 1661 goto error; | |
| 1662 } | |
| 1663 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &p); | |
| 1664 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &g); | |
| 1665 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &q); | |
| 1666 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &y); | |
| 1667 pos += sshcom_read_mpint(ciphertext+pos, cipherlen-pos, &x); | |
| 1668 if (!x.start) { | |
| 1669 errmsg = "key data did not contain five integers"; | |
| 1670 goto error; | |
| 1671 } | |
|
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1672 |
| 1308 | 1673 alg = &ssh_dss; |
| 1674 pos = 0; | |
| 1675 pos += put_string(blob+pos, "ssh-dss", 7); | |
| 1676 pos += put_mp(blob+pos, p.start, p.bytes); | |
| 1677 pos += put_mp(blob+pos, q.start, q.bytes); | |
| 1678 pos += put_mp(blob+pos, g.start, g.bytes); | |
| 1679 pos += put_mp(blob+pos, y.start, y.bytes); | |
| 1680 publen = pos; | |
| 1681 pos += put_mp(blob+pos, x.start, x.bytes); | |
| 1682 privlen = pos - publen; | |
| 1683 } else | |
| 1684 return NULL; | |
| 1685 | |
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1686 dropbear_assert(privlen > 0); /* should have bombed by now if not */ |
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1687 |
| 1308 | 1688 retkey = snew(struct ssh2_userkey); |
| 1689 retkey->alg = alg; | |
| 1690 retkey->data = alg->createkey(blob, publen, blob+publen, privlen); | |
| 1691 if (!retkey->data) { | |
|
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1692 m_free(retkey); |
| 1308 | 1693 errmsg = "unable to create key data structure"; |
| 1694 goto error; | |
| 1695 } | |
| 1696 retkey->comment = dupstr(key->comment); | |
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1697 |
| 1308 | 1698 errmsg = NULL; /* no error */ |
| 1699 ret = retkey; | |
| 1700 | |
| 1701 error: | |
| 1702 if (blob) { | |
| 1703 memset(blob, 0, blobsize); | |
|
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1704 m_free(blob); |
| 1308 | 1705 } |
| 1706 memset(key->keyblob, 0, key->keyblob_size); | |
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1707 m_free(key->keyblob); |
| 1308 | 1708 memset(key, 0, sizeof(*key)); |
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1709 m_free(key); |
| 1308 | 1710 return ret; |
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1711 } |
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1712 |
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1713 int sshcom_write(const char *filename, sign_key *key, |
| 1308 | 1714 char *passphrase) |
|
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1715 { |
| 1308 | 1716 unsigned char *pubblob, *privblob; |
| 1717 int publen, privlen; | |
| 1718 unsigned char *outblob; | |
| 1719 int outlen; | |
| 1720 struct mpint_pos numbers[6]; | |
| 1721 int nnumbers, initial_zero, pos, lenpos, i; | |
| 1722 char *type; | |
| 1723 char *ciphertext; | |
| 1724 int cipherlen; | |
| 1725 int ret = 0; | |
| 1726 FILE *fp; | |
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1727 |
| 1308 | 1728 /* |
| 1729 * Fetch the key blobs. | |
| 1730 */ | |
| 1731 pubblob = key->alg->public_blob(key->data, &publen); | |
| 1732 privblob = key->alg->private_blob(key->data, &privlen); | |
| 1733 outblob = NULL; | |
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1734 |
| 1308 | 1735 /* |
| 1736 * Find the sequence of integers to be encoded into the OpenSSH | |
| 1737 * key blob, and also decide on the header line. | |
| 1738 */ | |
| 1739 if (key->alg == &ssh_rsa) { | |
| 1740 int pos; | |
| 1741 struct mpint_pos n, e, d, p, q, iqmp; | |
|
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|
1742 |
| 1308 | 1743 pos = 4 + GET_32BIT(pubblob); |
| 1744 pos += ssh2_read_mpint(pubblob+pos, publen-pos, &e); | |
| 1745 pos += ssh2_read_mpint(pubblob+pos, publen-pos, &n); | |
| 1746 pos = 0; | |
| 1747 pos += ssh2_read_mpint(privblob+pos, privlen-pos, &d); | |
| 1748 pos += ssh2_read_mpint(privblob+pos, privlen-pos, &p); | |
| 1749 pos += ssh2_read_mpint(privblob+pos, privlen-pos, &q); | |
| 1750 pos += ssh2_read_mpint(privblob+pos, privlen-pos, &iqmp); | |
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1751 |
|
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1752 dropbear_assert(e.start && iqmp.start); /* can't go wrong */ |
|
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1753 |
| 1308 | 1754 numbers[0] = e; |
| 1755 numbers[1] = d; | |
| 1756 numbers[2] = n; | |
| 1757 numbers[3] = iqmp; | |
| 1758 numbers[4] = q; | |
| 1759 numbers[5] = p; | |
|
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|
1760 |
| 1308 | 1761 nnumbers = 6; |
| 1762 initial_zero = 0; | |
| 1763 type = "if-modn{sign{rsa-pkcs1-sha1},encrypt{rsa-pkcs1v2-oaep}}"; | |
| 1764 } else if (key->alg == &ssh_dss) { | |
| 1765 int pos; | |
| 1766 struct mpint_pos p, q, g, y, x; | |
| 1767 | |
| 1768 pos = 4 + GET_32BIT(pubblob); | |
| 1769 pos += ssh2_read_mpint(pubblob+pos, publen-pos, &p); | |
| 1770 pos += ssh2_read_mpint(pubblob+pos, publen-pos, &q); | |
| 1771 pos += ssh2_read_mpint(pubblob+pos, publen-pos, &g); | |
| 1772 pos += ssh2_read_mpint(pubblob+pos, publen-pos, &y); | |
| 1773 pos = 0; | |
| 1774 pos += ssh2_read_mpint(privblob+pos, privlen-pos, &x); | |
|
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1775 |
|
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1776 dropbear_assert(y.start && x.start); /* can't go wrong */ |
| 1308 | 1777 |
| 1778 numbers[0] = p; | |
| 1779 numbers[1] = g; | |
| 1780 numbers[2] = q; | |
| 1781 numbers[3] = y; | |
| 1782 numbers[4] = x; | |
|
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1783 |
| 1308 | 1784 nnumbers = 5; |
| 1785 initial_zero = 1; | |
| 1786 type = "dl-modp{sign{dsa-nist-sha1},dh{plain}}"; | |
| 1787 } else { | |
|
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1788 dropbear_assert(0); /* zoinks! */ |
| 1308 | 1789 } |
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1790 |
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1791 /* |
| 1308 | 1792 * Total size of key blob will be somewhere under 512 plus |
| 1793 * combined length of integers. We'll calculate the more | |
| 1794 * precise size as we construct the blob. | |
|
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1795 */ |
| 1308 | 1796 outlen = 512; |
| 1797 for (i = 0; i < nnumbers; i++) | |
| 1798 outlen += 4 + numbers[i].bytes; | |
| 1799 outblob = snewn(outlen, unsigned char); | |
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1800 |
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1801 /* |
| 1308 | 1802 * Create the unencrypted key blob. |
|
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1803 */ |
| 1308 | 1804 pos = 0; |
| 1805 PUT_32BIT(outblob+pos, SSHCOM_MAGIC_NUMBER); pos += 4; | |
|
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1806 pos += 4; /* length field, fill in later */ |
| 1308 | 1807 pos += put_string(outblob+pos, type, strlen(type)); |
| 1808 { | |
| 1809 char *ciphertype = passphrase ? "3des-cbc" : "none"; | |
| 1810 pos += put_string(outblob+pos, ciphertype, strlen(ciphertype)); | |
| 1811 } | |
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1812 lenpos = pos; /* remember this position */ |
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1813 pos += 4; /* encrypted-blob size */ |
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1814 pos += 4; /* encrypted-payload size */ |
| 1308 | 1815 if (initial_zero) { |
| 1816 PUT_32BIT(outblob+pos, 0); | |
| 1817 pos += 4; | |
| 1818 } | |
| 1819 for (i = 0; i < nnumbers; i++) | |
| 1820 pos += sshcom_put_mpint(outblob+pos, | |
| 1821 numbers[i].start, numbers[i].bytes); | |
| 1822 /* Now wrap up the encrypted payload. */ | |
| 1823 PUT_32BIT(outblob+lenpos+4, pos - (lenpos+8)); | |
| 1824 /* Pad encrypted blob to a multiple of cipher block size. */ | |
| 1825 if (passphrase) { | |
| 1826 int padding = -(pos - (lenpos+4)) & 7; | |
| 1827 while (padding--) | |
| 1828 outblob[pos++] = random_byte(); | |
| 1829 } | |
| 1830 ciphertext = (char *)outblob+lenpos+4; | |
| 1831 cipherlen = pos - (lenpos+4); | |
|
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1832 dropbear_assert(!passphrase || cipherlen % 8 == 0); |
| 1308 | 1833 /* Wrap up the encrypted blob string. */ |
| 1834 PUT_32BIT(outblob+lenpos, cipherlen); | |
| 1835 /* And finally fill in the total length field. */ | |
| 1836 PUT_32BIT(outblob+4, pos); | |
|
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1837 |
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1838 dropbear_assert(pos < outlen); |
| 1308 | 1839 |
| 1840 /* | |
| 1841 * Encrypt the key. | |
| 1842 */ | |
| 1843 if (passphrase) { | |
| 1844 /* | |
| 1845 * Derive encryption key from passphrase and iv/salt: | |
| 1846 * | |
| 1847 * - let block A equal MD5(passphrase) | |
| 1848 * - let block B equal MD5(passphrase || A) | |
| 1849 * - block C would be MD5(passphrase || A || B) and so on | |
| 1850 * - encryption key is the first N bytes of A || B | |
| 1851 */ | |
| 1852 struct MD5Context md5c; | |
| 1853 unsigned char keybuf[32], iv[8]; | |
| 1854 | |
| 1855 MD5Init(&md5c); | |
| 1856 MD5Update(&md5c, (unsigned char *)passphrase, strlen(passphrase)); | |
| 1857 MD5Final(keybuf, &md5c); | |
|
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1858 |
| 1308 | 1859 MD5Init(&md5c); |
| 1860 MD5Update(&md5c, (unsigned char *)passphrase, strlen(passphrase)); | |
| 1861 MD5Update(&md5c, keybuf, 16); | |
| 1862 MD5Final(keybuf+16, &md5c); | |
| 1863 | |
| 1864 /* | |
| 1865 * Now decrypt the key blob. | |
| 1866 */ | |
| 1867 memset(iv, 0, sizeof(iv)); | |
| 1868 des3_encrypt_pubkey_ossh(keybuf, iv, (unsigned char *)ciphertext, | |
| 1869 cipherlen); | |
| 1870 | |
| 1871 memset(&md5c, 0, sizeof(md5c)); | |
| 1872 memset(keybuf, 0, sizeof(keybuf)); | |
|
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1873 } |
|
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1874 |
| 1308 | 1875 /* |
| 1876 * And save it. We'll use Unix line endings just in case it's | |
| 1877 * subsequently transferred in binary mode. | |
| 1878 */ | |
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1879 fp = fopen(filename, "wb"); /* ensure Unix line endings */ |
| 1308 | 1880 if (!fp) |
| 1881 goto error; | |
| 1882 fputs("---- BEGIN SSH2 ENCRYPTED PRIVATE KEY ----\n", fp); | |
| 1883 fprintf(fp, "Comment: \""); | |
| 1884 /* | |
| 1885 * Comment header is broken with backslash-newline if it goes | |
| 1886 * over 70 chars. Although it's surrounded by quotes, it | |
| 1887 * _doesn't_ escape backslashes or quotes within the string. | |
| 1888 * Don't ask me, I didn't design it. | |
| 1889 */ | |
| 1890 { | |
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1891 int slen = 60; /* starts at 60 due to "Comment: " */ |
| 1308 | 1892 char *c = key->comment; |
| 1893 while ((int)strlen(c) > slen) { | |
| 1894 fprintf(fp, "%.*s\\\n", slen, c); | |
| 1895 c += slen; | |
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1896 slen = 70; /* allow 70 chars on subsequent lines */ |
| 1308 | 1897 } |
| 1898 fprintf(fp, "%s\"\n", c); | |
| 1899 } | |
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1900 base64_encode_fp(fp, outblob, pos, 70); |
| 1308 | 1901 fputs("---- END SSH2 ENCRYPTED PRIVATE KEY ----\n", fp); |
| 1902 fclose(fp); | |
| 1903 ret = 1; | |
| 1904 | |
| 1905 error: | |
| 1906 if (outblob) { | |
| 1907 memset(outblob, 0, outlen); | |
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1908 m_free(outblob); |
| 1308 | 1909 } |
| 1910 if (privblob) { | |
| 1911 memset(privblob, 0, privlen); | |
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1912 m_free(privblob); |
| 1308 | 1913 } |
| 1914 if (pubblob) { | |
| 1915 memset(pubblob, 0, publen); | |
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1916 m_free(pubblob); |
| 1308 | 1917 } |
| 1918 return ret; | |
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1919 } |
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1920 #endif /* ssh.com stuff disabled */ |
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1921 |
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1922 /* From PuTTY misc.c */ |
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1923 static int toint(unsigned u) |
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1924 { |
| 1308 | 1925 /* |
| 1926 * Convert an unsigned to an int, without running into the | |
| 1927 * undefined behaviour which happens by the strict C standard if | |
| 1928 * the value overflows. You'd hope that sensible compilers would | |
| 1929 * do the sensible thing in response to a cast, but actually I | |
| 1930 * don't trust modern compilers not to do silly things like | |
| 1931 * assuming that _obviously_ you wouldn't have caused an overflow | |
| 1932 * and so they can elide an 'if (i < 0)' test immediately after | |
| 1933 * the cast. | |
| 1934 * | |
| 1935 * Sensible compilers ought of course to optimise this entire | |
| 1936 * function into 'just return the input value'! | |
| 1937 */ | |
| 1938 if (u <= (unsigned)INT_MAX) | |
| 1939 return (int)u; | |
| 1940 else if (u >= (unsigned)INT_MIN) /* wrap in cast _to_ unsigned is OK */ | |
| 1941 return INT_MIN + (int)(u - (unsigned)INT_MIN); | |
| 1942 else | |
| 1943 return INT_MIN; /* fallback; should never occur on binary machines */ | |
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1944 } |