Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame^] | 1 | /* $OpenBSD: key.c,v 1.67 2006/08/03 03:34:42 deraadt Exp $ */ |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 2 | /* |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 3 | * read_bignum(): |
| 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 5 | * |
| 6 | * As far as I am concerned, the code I have written for this software |
| 7 | * can be used freely for any purpose. Any derived versions of this |
| 8 | * software must be clearly marked as such, and if the derived work is |
| 9 | * incompatible with the protocol description in the RFC file, it must be |
| 10 | * called by a name other than "ssh" or "Secure Shell". |
| 11 | * |
| 12 | * |
Ben Lindstrom | 4469723 | 2001-07-04 03:32:30 +0000 | [diff] [blame] | 13 | * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 14 | * |
| 15 | * Redistribution and use in source and binary forms, with or without |
| 16 | * modification, are permitted provided that the following conditions |
| 17 | * are met: |
| 18 | * 1. Redistributions of source code must retain the above copyright |
| 19 | * notice, this list of conditions and the following disclaimer. |
| 20 | * 2. Redistributions in binary form must reproduce the above copyright |
| 21 | * notice, this list of conditions and the following disclaimer in the |
| 22 | * documentation and/or other materials provided with the distribution. |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 25 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 26 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 27 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 28 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 29 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 30 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 31 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 32 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 33 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 34 | */ |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame^] | 35 | |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 36 | #include "includes.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 37 | |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame^] | 38 | #include <sys/types.h> |
| 39 | |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 40 | #include <openssl/evp.h> |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 41 | |
Damien Miller | a7a73ee | 2006-08-05 11:37:59 +1000 | [diff] [blame] | 42 | #include <stdio.h> |
Damien Miller | e3476ed | 2006-07-24 14:13:33 +1000 | [diff] [blame] | 43 | #include <string.h> |
| 44 | |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 45 | #include "xmalloc.h" |
| 46 | #include "key.h" |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 47 | #include "rsa.h" |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 48 | #include "uuencode.h" |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 49 | #include "buffer.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 50 | #include "log.h" |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 51 | |
| 52 | Key * |
| 53 | key_new(int type) |
| 54 | { |
| 55 | Key *k; |
| 56 | RSA *rsa; |
| 57 | DSA *dsa; |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 58 | k = xcalloc(1, sizeof(*k)); |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 59 | k->type = type; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 60 | k->dsa = NULL; |
| 61 | k->rsa = NULL; |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 62 | switch (k->type) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 63 | case KEY_RSA1: |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 64 | case KEY_RSA: |
Damien Miller | da75516 | 2002-01-22 23:09:22 +1100 | [diff] [blame] | 65 | if ((rsa = RSA_new()) == NULL) |
| 66 | fatal("key_new: RSA_new failed"); |
| 67 | if ((rsa->n = BN_new()) == NULL) |
| 68 | fatal("key_new: BN_new failed"); |
| 69 | if ((rsa->e = BN_new()) == NULL) |
| 70 | fatal("key_new: BN_new failed"); |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 71 | k->rsa = rsa; |
| 72 | break; |
| 73 | case KEY_DSA: |
Damien Miller | da75516 | 2002-01-22 23:09:22 +1100 | [diff] [blame] | 74 | if ((dsa = DSA_new()) == NULL) |
| 75 | fatal("key_new: DSA_new failed"); |
| 76 | if ((dsa->p = BN_new()) == NULL) |
| 77 | fatal("key_new: BN_new failed"); |
| 78 | if ((dsa->q = BN_new()) == NULL) |
| 79 | fatal("key_new: BN_new failed"); |
| 80 | if ((dsa->g = BN_new()) == NULL) |
| 81 | fatal("key_new: BN_new failed"); |
| 82 | if ((dsa->pub_key = BN_new()) == NULL) |
| 83 | fatal("key_new: BN_new failed"); |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 84 | k->dsa = dsa; |
| 85 | break; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 86 | case KEY_UNSPEC: |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 87 | break; |
| 88 | default: |
| 89 | fatal("key_new: bad key type %d", k->type); |
| 90 | break; |
| 91 | } |
| 92 | return k; |
| 93 | } |
Ben Lindstrom | 836f0e9 | 2002-06-23 21:21:30 +0000 | [diff] [blame] | 94 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 95 | Key * |
| 96 | key_new_private(int type) |
| 97 | { |
| 98 | Key *k = key_new(type); |
| 99 | switch (k->type) { |
| 100 | case KEY_RSA1: |
| 101 | case KEY_RSA: |
Damien Miller | da75516 | 2002-01-22 23:09:22 +1100 | [diff] [blame] | 102 | if ((k->rsa->d = BN_new()) == NULL) |
| 103 | fatal("key_new_private: BN_new failed"); |
| 104 | if ((k->rsa->iqmp = BN_new()) == NULL) |
| 105 | fatal("key_new_private: BN_new failed"); |
| 106 | if ((k->rsa->q = BN_new()) == NULL) |
| 107 | fatal("key_new_private: BN_new failed"); |
| 108 | if ((k->rsa->p = BN_new()) == NULL) |
| 109 | fatal("key_new_private: BN_new failed"); |
| 110 | if ((k->rsa->dmq1 = BN_new()) == NULL) |
| 111 | fatal("key_new_private: BN_new failed"); |
| 112 | if ((k->rsa->dmp1 = BN_new()) == NULL) |
| 113 | fatal("key_new_private: BN_new failed"); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 114 | break; |
| 115 | case KEY_DSA: |
Damien Miller | da75516 | 2002-01-22 23:09:22 +1100 | [diff] [blame] | 116 | if ((k->dsa->priv_key = BN_new()) == NULL) |
| 117 | fatal("key_new_private: BN_new failed"); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 118 | break; |
| 119 | case KEY_UNSPEC: |
| 120 | break; |
| 121 | default: |
| 122 | break; |
| 123 | } |
| 124 | return k; |
| 125 | } |
Ben Lindstrom | 836f0e9 | 2002-06-23 21:21:30 +0000 | [diff] [blame] | 126 | |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 127 | void |
| 128 | key_free(Key *k) |
| 129 | { |
Damien Miller | 429fcc2 | 2006-03-26 14:02:16 +1100 | [diff] [blame] | 130 | if (k == NULL) |
Damien Miller | bbaad77 | 2006-03-26 14:03:03 +1100 | [diff] [blame] | 131 | fatal("key_free: key is NULL"); |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 132 | switch (k->type) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 133 | case KEY_RSA1: |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 134 | case KEY_RSA: |
| 135 | if (k->rsa != NULL) |
| 136 | RSA_free(k->rsa); |
| 137 | k->rsa = NULL; |
| 138 | break; |
| 139 | case KEY_DSA: |
| 140 | if (k->dsa != NULL) |
| 141 | DSA_free(k->dsa); |
| 142 | k->dsa = NULL; |
| 143 | break; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 144 | case KEY_UNSPEC: |
| 145 | break; |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 146 | default: |
| 147 | fatal("key_free: bad key type %d", k->type); |
| 148 | break; |
| 149 | } |
| 150 | xfree(k); |
| 151 | } |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 152 | |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 153 | int |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 154 | key_equal(const Key *a, const Key *b) |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 155 | { |
| 156 | if (a == NULL || b == NULL || a->type != b->type) |
| 157 | return 0; |
| 158 | switch (a->type) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 159 | case KEY_RSA1: |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 160 | case KEY_RSA: |
| 161 | return a->rsa != NULL && b->rsa != NULL && |
| 162 | BN_cmp(a->rsa->e, b->rsa->e) == 0 && |
| 163 | BN_cmp(a->rsa->n, b->rsa->n) == 0; |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 164 | case KEY_DSA: |
| 165 | return a->dsa != NULL && b->dsa != NULL && |
| 166 | BN_cmp(a->dsa->p, b->dsa->p) == 0 && |
| 167 | BN_cmp(a->dsa->q, b->dsa->q) == 0 && |
| 168 | BN_cmp(a->dsa->g, b->dsa->g) == 0 && |
| 169 | BN_cmp(a->dsa->pub_key, b->dsa->pub_key) == 0; |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 170 | default: |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 171 | fatal("key_equal: bad key type %d", a->type); |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 172 | break; |
| 173 | } |
| 174 | return 0; |
| 175 | } |
| 176 | |
Damien Miller | 37876e9 | 2003-05-15 10:19:46 +1000 | [diff] [blame] | 177 | u_char* |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 178 | key_fingerprint_raw(const Key *k, enum fp_type dgst_type, |
| 179 | u_int *dgst_raw_length) |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 180 | { |
Ben Lindstrom | 80cb27d | 2002-03-05 01:33:36 +0000 | [diff] [blame] | 181 | const EVP_MD *md = NULL; |
Ben Lindstrom | f0b4853 | 2001-03-12 02:59:31 +0000 | [diff] [blame] | 182 | EVP_MD_CTX ctx; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 183 | u_char *blob = NULL; |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 184 | u_char *retval = NULL; |
Ben Lindstrom | 90fd814 | 2002-02-26 18:09:42 +0000 | [diff] [blame] | 185 | u_int len = 0; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 186 | int nlen, elen; |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 187 | |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 188 | *dgst_raw_length = 0; |
| 189 | |
Ben Lindstrom | f0b4853 | 2001-03-12 02:59:31 +0000 | [diff] [blame] | 190 | switch (dgst_type) { |
| 191 | case SSH_FP_MD5: |
| 192 | md = EVP_md5(); |
| 193 | break; |
| 194 | case SSH_FP_SHA1: |
| 195 | md = EVP_sha1(); |
| 196 | break; |
| 197 | default: |
| 198 | fatal("key_fingerprint_raw: bad digest type %d", |
| 199 | dgst_type); |
| 200 | } |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 201 | switch (k->type) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 202 | case KEY_RSA1: |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 203 | nlen = BN_num_bytes(k->rsa->n); |
| 204 | elen = BN_num_bytes(k->rsa->e); |
| 205 | len = nlen + elen; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 206 | blob = xmalloc(len); |
| 207 | BN_bn2bin(k->rsa->n, blob); |
| 208 | BN_bn2bin(k->rsa->e, blob + nlen); |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 209 | break; |
| 210 | case KEY_DSA: |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 211 | case KEY_RSA: |
| 212 | key_to_blob(k, &blob, &len); |
| 213 | break; |
| 214 | case KEY_UNSPEC: |
| 215 | return retval; |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 216 | default: |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 217 | fatal("key_fingerprint_raw: bad key type %d", k->type); |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 218 | break; |
| 219 | } |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 220 | if (blob != NULL) { |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 221 | retval = xmalloc(EVP_MAX_MD_SIZE); |
Damien Miller | 6536c7d | 2000-06-22 21:32:31 +1000 | [diff] [blame] | 222 | EVP_DigestInit(&ctx, md); |
| 223 | EVP_DigestUpdate(&ctx, blob, len); |
Damien Miller | 3672e4b | 2002-02-05 11:54:07 +1100 | [diff] [blame] | 224 | EVP_DigestFinal(&ctx, retval, dgst_raw_length); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 225 | memset(blob, 0, len); |
| 226 | xfree(blob); |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 227 | } else { |
| 228 | fatal("key_fingerprint_raw: blob is null"); |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 229 | } |
| 230 | return retval; |
| 231 | } |
| 232 | |
Ben Lindstrom | a962c2f | 2002-07-04 00:14:17 +0000 | [diff] [blame] | 233 | static char * |
| 234 | key_fingerprint_hex(u_char *dgst_raw, u_int dgst_raw_len) |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 235 | { |
| 236 | char *retval; |
Damien Miller | eccb9de | 2005-06-17 12:59:34 +1000 | [diff] [blame] | 237 | u_int i; |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 238 | |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 239 | retval = xcalloc(1, dgst_raw_len * 3 + 1); |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 240 | for (i = 0; i < dgst_raw_len; i++) { |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 241 | char hex[4]; |
| 242 | snprintf(hex, sizeof(hex), "%02x:", dgst_raw[i]); |
Darren Tucker | 2958861 | 2003-07-14 17:28:34 +1000 | [diff] [blame] | 243 | strlcat(retval, hex, dgst_raw_len * 3 + 1); |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 244 | } |
Darren Tucker | 2958861 | 2003-07-14 17:28:34 +1000 | [diff] [blame] | 245 | |
| 246 | /* Remove the trailing ':' character */ |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 247 | retval[(dgst_raw_len * 3) - 1] = '\0'; |
| 248 | return retval; |
| 249 | } |
| 250 | |
Ben Lindstrom | a962c2f | 2002-07-04 00:14:17 +0000 | [diff] [blame] | 251 | static char * |
| 252 | key_fingerprint_bubblebabble(u_char *dgst_raw, u_int dgst_raw_len) |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 253 | { |
| 254 | char vowels[] = { 'a', 'e', 'i', 'o', 'u', 'y' }; |
| 255 | char consonants[] = { 'b', 'c', 'd', 'f', 'g', 'h', 'k', 'l', 'm', |
| 256 | 'n', 'p', 'r', 's', 't', 'v', 'z', 'x' }; |
Ben Lindstrom | cbe3ad2 | 2001-03-11 20:06:59 +0000 | [diff] [blame] | 257 | u_int i, j = 0, rounds, seed = 1; |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 258 | char *retval; |
| 259 | |
| 260 | rounds = (dgst_raw_len / 2) + 1; |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 261 | retval = xcalloc((rounds * 6), sizeof(char)); |
Ben Lindstrom | cbe3ad2 | 2001-03-11 20:06:59 +0000 | [diff] [blame] | 262 | retval[j++] = 'x'; |
| 263 | for (i = 0; i < rounds; i++) { |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 264 | u_int idx0, idx1, idx2, idx3, idx4; |
Ben Lindstrom | cbe3ad2 | 2001-03-11 20:06:59 +0000 | [diff] [blame] | 265 | if ((i + 1 < rounds) || (dgst_raw_len % 2 != 0)) { |
| 266 | idx0 = (((((u_int)(dgst_raw[2 * i])) >> 6) & 3) + |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 267 | seed) % 6; |
Ben Lindstrom | cbe3ad2 | 2001-03-11 20:06:59 +0000 | [diff] [blame] | 268 | idx1 = (((u_int)(dgst_raw[2 * i])) >> 2) & 15; |
| 269 | idx2 = ((((u_int)(dgst_raw[2 * i])) & 3) + |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 270 | (seed / 6)) % 6; |
Ben Lindstrom | cbe3ad2 | 2001-03-11 20:06:59 +0000 | [diff] [blame] | 271 | retval[j++] = vowels[idx0]; |
| 272 | retval[j++] = consonants[idx1]; |
| 273 | retval[j++] = vowels[idx2]; |
| 274 | if ((i + 1) < rounds) { |
| 275 | idx3 = (((u_int)(dgst_raw[(2 * i) + 1])) >> 4) & 15; |
| 276 | idx4 = (((u_int)(dgst_raw[(2 * i) + 1]))) & 15; |
| 277 | retval[j++] = consonants[idx3]; |
| 278 | retval[j++] = '-'; |
| 279 | retval[j++] = consonants[idx4]; |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 280 | seed = ((seed * 5) + |
Ben Lindstrom | cbe3ad2 | 2001-03-11 20:06:59 +0000 | [diff] [blame] | 281 | ((((u_int)(dgst_raw[2 * i])) * 7) + |
| 282 | ((u_int)(dgst_raw[(2 * i) + 1])))) % 36; |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 283 | } |
| 284 | } else { |
| 285 | idx0 = seed % 6; |
| 286 | idx1 = 16; |
| 287 | idx2 = seed / 6; |
Ben Lindstrom | cbe3ad2 | 2001-03-11 20:06:59 +0000 | [diff] [blame] | 288 | retval[j++] = vowels[idx0]; |
| 289 | retval[j++] = consonants[idx1]; |
| 290 | retval[j++] = vowels[idx2]; |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 291 | } |
| 292 | } |
Ben Lindstrom | cbe3ad2 | 2001-03-11 20:06:59 +0000 | [diff] [blame] | 293 | retval[j++] = 'x'; |
| 294 | retval[j++] = '\0'; |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 295 | return retval; |
| 296 | } |
| 297 | |
Ben Lindstrom | a962c2f | 2002-07-04 00:14:17 +0000 | [diff] [blame] | 298 | char * |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 299 | key_fingerprint(const Key *k, enum fp_type dgst_type, enum fp_rep dgst_rep) |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 300 | { |
Ben Lindstrom | a370005 | 2001-04-05 23:26:32 +0000 | [diff] [blame] | 301 | char *retval = NULL; |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 302 | u_char *dgst_raw; |
Damien Miller | 3672e4b | 2002-02-05 11:54:07 +1100 | [diff] [blame] | 303 | u_int dgst_raw_len; |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 304 | |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 305 | dgst_raw = key_fingerprint_raw(k, dgst_type, &dgst_raw_len); |
| 306 | if (!dgst_raw) |
Ben Lindstrom | cfccef9 | 2001-03-13 04:57:58 +0000 | [diff] [blame] | 307 | fatal("key_fingerprint: null from key_fingerprint_raw()"); |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 308 | switch (dgst_rep) { |
Ben Lindstrom | 96e8ea6 | 2001-03-11 20:03:44 +0000 | [diff] [blame] | 309 | case SSH_FP_HEX: |
| 310 | retval = key_fingerprint_hex(dgst_raw, dgst_raw_len); |
| 311 | break; |
| 312 | case SSH_FP_BUBBLEBABBLE: |
| 313 | retval = key_fingerprint_bubblebabble(dgst_raw, dgst_raw_len); |
| 314 | break; |
| 315 | default: |
| 316 | fatal("key_fingerprint_ex: bad digest representation %d", |
| 317 | dgst_rep); |
| 318 | break; |
| 319 | } |
| 320 | memset(dgst_raw, 0, dgst_raw_len); |
| 321 | xfree(dgst_raw); |
| 322 | return retval; |
| 323 | } |
| 324 | |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 325 | /* |
| 326 | * Reads a multiple-precision integer in decimal from the buffer, and advances |
| 327 | * the pointer. The integer must already be initialized. This function is |
| 328 | * permitted to modify the buffer. This leaves *cpp to point just beyond the |
| 329 | * last processed (and maybe modified) character. Note that this may modify |
| 330 | * the buffer containing the number. |
| 331 | */ |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 332 | static int |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 333 | read_bignum(char **cpp, BIGNUM * value) |
| 334 | { |
| 335 | char *cp = *cpp; |
| 336 | int old; |
| 337 | |
| 338 | /* Skip any leading whitespace. */ |
| 339 | for (; *cp == ' ' || *cp == '\t'; cp++) |
| 340 | ; |
| 341 | |
| 342 | /* Check that it begins with a decimal digit. */ |
| 343 | if (*cp < '0' || *cp > '9') |
| 344 | return 0; |
| 345 | |
| 346 | /* Save starting position. */ |
| 347 | *cpp = cp; |
| 348 | |
| 349 | /* Move forward until all decimal digits skipped. */ |
| 350 | for (; *cp >= '0' && *cp <= '9'; cp++) |
| 351 | ; |
| 352 | |
| 353 | /* Save the old terminating character, and replace it by \0. */ |
| 354 | old = *cp; |
| 355 | *cp = 0; |
| 356 | |
| 357 | /* Parse the number. */ |
| 358 | if (BN_dec2bn(&value, *cpp) == 0) |
| 359 | return 0; |
| 360 | |
| 361 | /* Restore old terminating character. */ |
| 362 | *cp = old; |
| 363 | |
| 364 | /* Move beyond the number and return success. */ |
| 365 | *cpp = cp; |
| 366 | return 1; |
| 367 | } |
Ben Lindstrom | 836f0e9 | 2002-06-23 21:21:30 +0000 | [diff] [blame] | 368 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 369 | static int |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 370 | write_bignum(FILE *f, BIGNUM *num) |
| 371 | { |
| 372 | char *buf = BN_bn2dec(num); |
| 373 | if (buf == NULL) { |
| 374 | error("write_bignum: BN_bn2dec() failed"); |
| 375 | return 0; |
| 376 | } |
| 377 | fprintf(f, " %s", buf); |
Damien Miller | af3030f | 2001-10-10 15:00:49 +1000 | [diff] [blame] | 378 | OPENSSL_free(buf); |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 379 | return 1; |
| 380 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 381 | |
Ben Lindstrom | 309f3d1 | 2001-09-20 00:55:53 +0000 | [diff] [blame] | 382 | /* returns 1 ok, -1 error */ |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 383 | int |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 384 | key_read(Key *ret, char **cpp) |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 385 | { |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 386 | Key *k; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 387 | int success = -1; |
| 388 | char *cp, *space; |
| 389 | int len, n, type; |
| 390 | u_int bits; |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 391 | u_char *blob; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 392 | |
| 393 | cp = *cpp; |
| 394 | |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 395 | switch (ret->type) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 396 | case KEY_RSA1: |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 397 | /* Get number of bits. */ |
| 398 | if (*cp < '0' || *cp > '9') |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 399 | return -1; /* Bad bit count... */ |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 400 | for (bits = 0; *cp >= '0' && *cp <= '9'; cp++) |
| 401 | bits = 10 * bits + *cp - '0'; |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 402 | if (bits == 0) |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 403 | return -1; |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 404 | *cpp = cp; |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 405 | /* Get public exponent, public modulus. */ |
| 406 | if (!read_bignum(cpp, ret->rsa->e)) |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 407 | return -1; |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 408 | if (!read_bignum(cpp, ret->rsa->n)) |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 409 | return -1; |
| 410 | success = 1; |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 411 | break; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 412 | case KEY_UNSPEC: |
| 413 | case KEY_RSA: |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 414 | case KEY_DSA: |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 415 | space = strchr(cp, ' '); |
| 416 | if (space == NULL) { |
Damien Miller | 386f1f3 | 2003-02-24 11:54:57 +1100 | [diff] [blame] | 417 | debug3("key_read: missing whitespace"); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 418 | return -1; |
| 419 | } |
| 420 | *space = '\0'; |
| 421 | type = key_type_from_name(cp); |
| 422 | *space = ' '; |
| 423 | if (type == KEY_UNSPEC) { |
Damien Miller | 386f1f3 | 2003-02-24 11:54:57 +1100 | [diff] [blame] | 424 | debug3("key_read: missing keytype"); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 425 | return -1; |
| 426 | } |
| 427 | cp = space+1; |
| 428 | if (*cp == '\0') { |
| 429 | debug3("key_read: short string"); |
| 430 | return -1; |
| 431 | } |
| 432 | if (ret->type == KEY_UNSPEC) { |
| 433 | ret->type = type; |
| 434 | } else if (ret->type != type) { |
| 435 | /* is a key, but different type */ |
| 436 | debug3("key_read: type mismatch"); |
Ben Lindstrom | 309f3d1 | 2001-09-20 00:55:53 +0000 | [diff] [blame] | 437 | return -1; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 438 | } |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 439 | len = 2*strlen(cp); |
| 440 | blob = xmalloc(len); |
| 441 | n = uudecode(cp, blob, len); |
Damien Miller | e247cc4 | 2000-05-07 12:03:14 +1000 | [diff] [blame] | 442 | if (n < 0) { |
Damien Miller | b1715dc | 2000-05-30 13:44:51 +1000 | [diff] [blame] | 443 | error("key_read: uudecode %s failed", cp); |
Ben Lindstrom | 4cbc181 | 2001-12-06 16:41:41 +0000 | [diff] [blame] | 444 | xfree(blob); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 445 | return -1; |
Damien Miller | e247cc4 | 2000-05-07 12:03:14 +1000 | [diff] [blame] | 446 | } |
Darren Tucker | 502d384 | 2003-06-28 12:38:01 +1000 | [diff] [blame] | 447 | k = key_from_blob(blob, (u_int)n); |
Ben Lindstrom | 4cbc181 | 2001-12-06 16:41:41 +0000 | [diff] [blame] | 448 | xfree(blob); |
Damien Miller | b1715dc | 2000-05-30 13:44:51 +1000 | [diff] [blame] | 449 | if (k == NULL) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 450 | error("key_read: key_from_blob %s failed", cp); |
| 451 | return -1; |
Damien Miller | b1715dc | 2000-05-30 13:44:51 +1000 | [diff] [blame] | 452 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 453 | if (k->type != type) { |
| 454 | error("key_read: type mismatch: encoding error"); |
| 455 | key_free(k); |
| 456 | return -1; |
| 457 | } |
| 458 | /*XXXX*/ |
| 459 | if (ret->type == KEY_RSA) { |
| 460 | if (ret->rsa != NULL) |
| 461 | RSA_free(ret->rsa); |
| 462 | ret->rsa = k->rsa; |
| 463 | k->rsa = NULL; |
| 464 | success = 1; |
| 465 | #ifdef DEBUG_PK |
| 466 | RSA_print_fp(stderr, ret->rsa, 8); |
| 467 | #endif |
| 468 | } else { |
| 469 | if (ret->dsa != NULL) |
| 470 | DSA_free(ret->dsa); |
| 471 | ret->dsa = k->dsa; |
| 472 | k->dsa = NULL; |
| 473 | success = 1; |
| 474 | #ifdef DEBUG_PK |
| 475 | DSA_print_fp(stderr, ret->dsa, 8); |
| 476 | #endif |
| 477 | } |
| 478 | /*XXXX*/ |
Ben Lindstrom | 4cbc181 | 2001-12-06 16:41:41 +0000 | [diff] [blame] | 479 | key_free(k); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 480 | if (success != 1) |
| 481 | break; |
Damien Miller | b1715dc | 2000-05-30 13:44:51 +1000 | [diff] [blame] | 482 | /* advance cp: skip whitespace and data */ |
| 483 | while (*cp == ' ' || *cp == '\t') |
| 484 | cp++; |
| 485 | while (*cp != '\0' && *cp != ' ' && *cp != '\t') |
| 486 | cp++; |
| 487 | *cpp = cp; |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 488 | break; |
| 489 | default: |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 490 | fatal("key_read: bad key type: %d", ret->type); |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 491 | break; |
| 492 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 493 | return success; |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 494 | } |
Ben Lindstrom | 836f0e9 | 2002-06-23 21:21:30 +0000 | [diff] [blame] | 495 | |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 496 | int |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 497 | key_write(const Key *key, FILE *f) |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 498 | { |
Ben Lindstrom | 90fd814 | 2002-02-26 18:09:42 +0000 | [diff] [blame] | 499 | int n, success = 0; |
| 500 | u_int len, bits = 0; |
Damien Miller | a10f561 | 2002-09-12 09:49:15 +1000 | [diff] [blame] | 501 | u_char *blob; |
| 502 | char *uu; |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 503 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 504 | if (key->type == KEY_RSA1 && key->rsa != NULL) { |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 505 | /* size of modulus 'n' */ |
| 506 | bits = BN_num_bits(key->rsa->n); |
| 507 | fprintf(f, "%u", bits); |
| 508 | if (write_bignum(f, key->rsa->e) && |
| 509 | write_bignum(f, key->rsa->n)) { |
| 510 | success = 1; |
| 511 | } else { |
| 512 | error("key_write: failed for RSA key"); |
| 513 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 514 | } else if ((key->type == KEY_DSA && key->dsa != NULL) || |
| 515 | (key->type == KEY_RSA && key->rsa != NULL)) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 516 | key_to_blob(key, &blob, &len); |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 517 | uu = xmalloc(2*len); |
Damien Miller | e247cc4 | 2000-05-07 12:03:14 +1000 | [diff] [blame] | 518 | n = uuencode(blob, len, uu, 2*len); |
| 519 | if (n > 0) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 520 | fprintf(f, "%s %s", key_ssh_name(key), uu); |
Damien Miller | e247cc4 | 2000-05-07 12:03:14 +1000 | [diff] [blame] | 521 | success = 1; |
| 522 | } |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 523 | xfree(blob); |
| 524 | xfree(uu); |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 525 | } |
| 526 | return success; |
| 527 | } |
Ben Lindstrom | 836f0e9 | 2002-06-23 21:21:30 +0000 | [diff] [blame] | 528 | |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 529 | const char * |
| 530 | key_type(const Key *k) |
Damien Miller | e247cc4 | 2000-05-07 12:03:14 +1000 | [diff] [blame] | 531 | { |
| 532 | switch (k->type) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 533 | case KEY_RSA1: |
| 534 | return "RSA1"; |
Damien Miller | e247cc4 | 2000-05-07 12:03:14 +1000 | [diff] [blame] | 535 | case KEY_RSA: |
| 536 | return "RSA"; |
Damien Miller | e247cc4 | 2000-05-07 12:03:14 +1000 | [diff] [blame] | 537 | case KEY_DSA: |
| 538 | return "DSA"; |
Damien Miller | e247cc4 | 2000-05-07 12:03:14 +1000 | [diff] [blame] | 539 | } |
| 540 | return "unknown"; |
| 541 | } |
Ben Lindstrom | 836f0e9 | 2002-06-23 21:21:30 +0000 | [diff] [blame] | 542 | |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 543 | const char * |
| 544 | key_ssh_name(const Key *k) |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 545 | { |
| 546 | switch (k->type) { |
| 547 | case KEY_RSA: |
| 548 | return "ssh-rsa"; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 549 | case KEY_DSA: |
| 550 | return "ssh-dss"; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 551 | } |
| 552 | return "ssh-unknown"; |
| 553 | } |
Ben Lindstrom | 836f0e9 | 2002-06-23 21:21:30 +0000 | [diff] [blame] | 554 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 555 | u_int |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 556 | key_size(const Key *k) |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 557 | { |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 558 | switch (k->type) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 559 | case KEY_RSA1: |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 560 | case KEY_RSA: |
| 561 | return BN_num_bits(k->rsa->n); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 562 | case KEY_DSA: |
| 563 | return BN_num_bits(k->dsa->p); |
Damien Miller | ad833b3 | 2000-08-23 10:46:23 +1000 | [diff] [blame] | 564 | } |
| 565 | return 0; |
| 566 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 567 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 568 | static RSA * |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 569 | rsa_generate_private_key(u_int bits) |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 570 | { |
Kevin Steves | ef4eea9 | 2001-02-05 12:42:17 +0000 | [diff] [blame] | 571 | RSA *private; |
Damien Miller | 69b7203 | 2006-03-26 14:02:35 +1100 | [diff] [blame] | 572 | |
Kevin Steves | ef4eea9 | 2001-02-05 12:42:17 +0000 | [diff] [blame] | 573 | private = RSA_generate_key(bits, 35, NULL, NULL); |
| 574 | if (private == NULL) |
| 575 | fatal("rsa_generate_private_key: key generation failed."); |
| 576 | return private; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 577 | } |
| 578 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 579 | static DSA* |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 580 | dsa_generate_private_key(u_int bits) |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 581 | { |
| 582 | DSA *private = DSA_generate_parameters(bits, NULL, 0, NULL, NULL, NULL, NULL); |
Damien Miller | 69b7203 | 2006-03-26 14:02:35 +1100 | [diff] [blame] | 583 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 584 | if (private == NULL) |
| 585 | fatal("dsa_generate_private_key: DSA_generate_parameters failed"); |
| 586 | if (!DSA_generate_key(private)) |
Kevin Steves | ef4eea9 | 2001-02-05 12:42:17 +0000 | [diff] [blame] | 587 | fatal("dsa_generate_private_key: DSA_generate_key failed."); |
| 588 | if (private == NULL) |
| 589 | fatal("dsa_generate_private_key: NULL."); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 590 | return private; |
| 591 | } |
| 592 | |
| 593 | Key * |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 594 | key_generate(int type, u_int bits) |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 595 | { |
| 596 | Key *k = key_new(KEY_UNSPEC); |
| 597 | switch (type) { |
Kevin Steves | ef4eea9 | 2001-02-05 12:42:17 +0000 | [diff] [blame] | 598 | case KEY_DSA: |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 599 | k->dsa = dsa_generate_private_key(bits); |
| 600 | break; |
| 601 | case KEY_RSA: |
| 602 | case KEY_RSA1: |
| 603 | k->rsa = rsa_generate_private_key(bits); |
| 604 | break; |
| 605 | default: |
Kevin Steves | ef4eea9 | 2001-02-05 12:42:17 +0000 | [diff] [blame] | 606 | fatal("key_generate: unknown type %d", type); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 607 | } |
Kevin Steves | ef4eea9 | 2001-02-05 12:42:17 +0000 | [diff] [blame] | 608 | k->type = type; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 609 | return k; |
| 610 | } |
| 611 | |
| 612 | Key * |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 613 | key_from_private(const Key *k) |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 614 | { |
| 615 | Key *n = NULL; |
| 616 | switch (k->type) { |
Kevin Steves | ef4eea9 | 2001-02-05 12:42:17 +0000 | [diff] [blame] | 617 | case KEY_DSA: |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 618 | n = key_new(k->type); |
| 619 | BN_copy(n->dsa->p, k->dsa->p); |
| 620 | BN_copy(n->dsa->q, k->dsa->q); |
| 621 | BN_copy(n->dsa->g, k->dsa->g); |
| 622 | BN_copy(n->dsa->pub_key, k->dsa->pub_key); |
| 623 | break; |
| 624 | case KEY_RSA: |
| 625 | case KEY_RSA1: |
| 626 | n = key_new(k->type); |
| 627 | BN_copy(n->rsa->n, k->rsa->n); |
| 628 | BN_copy(n->rsa->e, k->rsa->e); |
| 629 | break; |
| 630 | default: |
Kevin Steves | ef4eea9 | 2001-02-05 12:42:17 +0000 | [diff] [blame] | 631 | fatal("key_from_private: unknown type %d", k->type); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 632 | break; |
| 633 | } |
| 634 | return n; |
| 635 | } |
| 636 | |
| 637 | int |
| 638 | key_type_from_name(char *name) |
| 639 | { |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 640 | if (strcmp(name, "rsa1") == 0) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 641 | return KEY_RSA1; |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 642 | } else if (strcmp(name, "rsa") == 0) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 643 | return KEY_RSA; |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 644 | } else if (strcmp(name, "dsa") == 0) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 645 | return KEY_DSA; |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 646 | } else if (strcmp(name, "ssh-rsa") == 0) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 647 | return KEY_RSA; |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 648 | } else if (strcmp(name, "ssh-dss") == 0) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 649 | return KEY_DSA; |
| 650 | } |
Ben Lindstrom | b54873a | 2001-03-11 20:01:55 +0000 | [diff] [blame] | 651 | debug2("key_type_from_name: unknown key type '%s'", name); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 652 | return KEY_UNSPEC; |
| 653 | } |
| 654 | |
Ben Lindstrom | 982dbbc | 2001-04-17 18:11:36 +0000 | [diff] [blame] | 655 | int |
| 656 | key_names_valid2(const char *names) |
| 657 | { |
| 658 | char *s, *cp, *p; |
| 659 | |
| 660 | if (names == NULL || strcmp(names, "") == 0) |
| 661 | return 0; |
| 662 | s = cp = xstrdup(names); |
| 663 | for ((p = strsep(&cp, ",")); p && *p != '\0'; |
Damien Miller | 9f0f5c6 | 2001-12-21 14:45:46 +1100 | [diff] [blame] | 664 | (p = strsep(&cp, ","))) { |
Ben Lindstrom | 982dbbc | 2001-04-17 18:11:36 +0000 | [diff] [blame] | 665 | switch (key_type_from_name(p)) { |
| 666 | case KEY_RSA1: |
| 667 | case KEY_UNSPEC: |
| 668 | xfree(s); |
| 669 | return 0; |
| 670 | } |
| 671 | } |
| 672 | debug3("key names ok: [%s]", names); |
| 673 | xfree(s); |
| 674 | return 1; |
| 675 | } |
| 676 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 677 | Key * |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 678 | key_from_blob(const u_char *blob, u_int blen) |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 679 | { |
| 680 | Buffer b; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 681 | int rlen, type; |
Darren Tucker | 08d04fa | 2004-11-05 20:42:28 +1100 | [diff] [blame] | 682 | char *ktype = NULL; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 683 | Key *key = NULL; |
| 684 | |
| 685 | #ifdef DEBUG_PK |
| 686 | dump_base64(stderr, blob, blen); |
| 687 | #endif |
| 688 | buffer_init(&b); |
| 689 | buffer_append(&b, blob, blen); |
Darren Tucker | 08d04fa | 2004-11-05 20:42:28 +1100 | [diff] [blame] | 690 | if ((ktype = buffer_get_string_ret(&b, NULL)) == NULL) { |
| 691 | error("key_from_blob: can't read key type"); |
| 692 | goto out; |
| 693 | } |
| 694 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 695 | type = key_type_from_name(ktype); |
| 696 | |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 697 | switch (type) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 698 | case KEY_RSA: |
| 699 | key = key_new(type); |
Darren Tucker | 08d04fa | 2004-11-05 20:42:28 +1100 | [diff] [blame] | 700 | if (buffer_get_bignum2_ret(&b, key->rsa->e) == -1 || |
| 701 | buffer_get_bignum2_ret(&b, key->rsa->n) == -1) { |
| 702 | error("key_from_blob: can't read rsa key"); |
| 703 | key_free(key); |
| 704 | key = NULL; |
| 705 | goto out; |
| 706 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 707 | #ifdef DEBUG_PK |
| 708 | RSA_print_fp(stderr, key->rsa, 8); |
| 709 | #endif |
| 710 | break; |
| 711 | case KEY_DSA: |
| 712 | key = key_new(type); |
Darren Tucker | 08d04fa | 2004-11-05 20:42:28 +1100 | [diff] [blame] | 713 | if (buffer_get_bignum2_ret(&b, key->dsa->p) == -1 || |
| 714 | buffer_get_bignum2_ret(&b, key->dsa->q) == -1 || |
| 715 | buffer_get_bignum2_ret(&b, key->dsa->g) == -1 || |
| 716 | buffer_get_bignum2_ret(&b, key->dsa->pub_key) == -1) { |
| 717 | error("key_from_blob: can't read dsa key"); |
| 718 | key_free(key); |
| 719 | key = NULL; |
| 720 | goto out; |
| 721 | } |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 722 | #ifdef DEBUG_PK |
| 723 | DSA_print_fp(stderr, key->dsa, 8); |
| 724 | #endif |
| 725 | break; |
| 726 | case KEY_UNSPEC: |
| 727 | key = key_new(type); |
| 728 | break; |
| 729 | default: |
| 730 | error("key_from_blob: cannot handle type %s", ktype); |
Darren Tucker | 08d04fa | 2004-11-05 20:42:28 +1100 | [diff] [blame] | 731 | goto out; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 732 | } |
| 733 | rlen = buffer_len(&b); |
| 734 | if (key != NULL && rlen != 0) |
| 735 | error("key_from_blob: remaining bytes in key blob %d", rlen); |
Darren Tucker | 08d04fa | 2004-11-05 20:42:28 +1100 | [diff] [blame] | 736 | out: |
| 737 | if (ktype != NULL) |
| 738 | xfree(ktype); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 739 | buffer_free(&b); |
| 740 | return key; |
| 741 | } |
| 742 | |
| 743 | int |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 744 | key_to_blob(const Key *key, u_char **blobp, u_int *lenp) |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 745 | { |
| 746 | Buffer b; |
| 747 | int len; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 748 | |
| 749 | if (key == NULL) { |
| 750 | error("key_to_blob: key == NULL"); |
| 751 | return 0; |
| 752 | } |
| 753 | buffer_init(&b); |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 754 | switch (key->type) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 755 | case KEY_DSA: |
| 756 | buffer_put_cstring(&b, key_ssh_name(key)); |
| 757 | buffer_put_bignum2(&b, key->dsa->p); |
| 758 | buffer_put_bignum2(&b, key->dsa->q); |
| 759 | buffer_put_bignum2(&b, key->dsa->g); |
| 760 | buffer_put_bignum2(&b, key->dsa->pub_key); |
| 761 | break; |
| 762 | case KEY_RSA: |
| 763 | buffer_put_cstring(&b, key_ssh_name(key)); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 764 | buffer_put_bignum2(&b, key->rsa->e); |
Ben Lindstrom | bf555ba | 2001-01-18 02:04:35 +0000 | [diff] [blame] | 765 | buffer_put_bignum2(&b, key->rsa->n); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 766 | break; |
| 767 | default: |
Ben Lindstrom | 99a30f1 | 2001-09-18 05:49:14 +0000 | [diff] [blame] | 768 | error("key_to_blob: unsupported key type %d", key->type); |
| 769 | buffer_free(&b); |
| 770 | return 0; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 771 | } |
| 772 | len = buffer_len(&b); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 773 | if (lenp != NULL) |
| 774 | *lenp = len; |
Ben Lindstrom | 2bf759c | 2002-07-07 22:13:31 +0000 | [diff] [blame] | 775 | if (blobp != NULL) { |
| 776 | *blobp = xmalloc(len); |
| 777 | memcpy(*blobp, buffer_ptr(&b), len); |
| 778 | } |
| 779 | memset(buffer_ptr(&b), 0, len); |
| 780 | buffer_free(&b); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 781 | return len; |
| 782 | } |
| 783 | |
| 784 | int |
| 785 | key_sign( |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 786 | const Key *key, |
Ben Lindstrom | 90fd814 | 2002-02-26 18:09:42 +0000 | [diff] [blame] | 787 | u_char **sigp, u_int *lenp, |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 788 | const u_char *data, u_int datalen) |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 789 | { |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 790 | switch (key->type) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 791 | case KEY_DSA: |
| 792 | return ssh_dss_sign(key, sigp, lenp, data, datalen); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 793 | case KEY_RSA: |
| 794 | return ssh_rsa_sign(key, sigp, lenp, data, datalen); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 795 | default: |
Darren Tucker | 5cb30ad | 2004-08-12 22:40:24 +1000 | [diff] [blame] | 796 | error("key_sign: invalid key type %d", key->type); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 797 | return -1; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 798 | } |
| 799 | } |
| 800 | |
Ben Lindstrom | 01fff0c | 2002-06-06 20:54:07 +0000 | [diff] [blame] | 801 | /* |
| 802 | * key_verify returns 1 for a correct signature, 0 for an incorrect signature |
| 803 | * and -1 on error. |
| 804 | */ |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 805 | int |
| 806 | key_verify( |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 807 | const Key *key, |
| 808 | const u_char *signature, u_int signaturelen, |
| 809 | const u_char *data, u_int datalen) |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 810 | { |
Ben Lindstrom | 5363aee | 2001-06-25 04:42:20 +0000 | [diff] [blame] | 811 | if (signaturelen == 0) |
| 812 | return -1; |
| 813 | |
Ben Lindstrom | 1c37c6a | 2001-12-06 18:00:18 +0000 | [diff] [blame] | 814 | switch (key->type) { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 815 | case KEY_DSA: |
| 816 | return ssh_dss_verify(key, signature, signaturelen, data, datalen); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 817 | case KEY_RSA: |
| 818 | return ssh_rsa_verify(key, signature, signaturelen, data, datalen); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 819 | default: |
Darren Tucker | 5cb30ad | 2004-08-12 22:40:24 +1000 | [diff] [blame] | 820 | error("key_verify: invalid key type %d", key->type); |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 821 | return -1; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 822 | } |
| 823 | } |
Ben Lindstrom | a674e8d | 2002-03-22 01:45:53 +0000 | [diff] [blame] | 824 | |
| 825 | /* Converts a private to a public key */ |
Ben Lindstrom | a674e8d | 2002-03-22 01:45:53 +0000 | [diff] [blame] | 826 | Key * |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 827 | key_demote(const Key *k) |
Ben Lindstrom | a674e8d | 2002-03-22 01:45:53 +0000 | [diff] [blame] | 828 | { |
| 829 | Key *pk; |
Ben Lindstrom | 6328ab3 | 2002-03-22 02:54:23 +0000 | [diff] [blame] | 830 | |
Damien Miller | 07d86be | 2006-03-26 14:19:21 +1100 | [diff] [blame] | 831 | pk = xcalloc(1, sizeof(*pk)); |
Ben Lindstrom | a674e8d | 2002-03-22 01:45:53 +0000 | [diff] [blame] | 832 | pk->type = k->type; |
| 833 | pk->flags = k->flags; |
| 834 | pk->dsa = NULL; |
| 835 | pk->rsa = NULL; |
| 836 | |
| 837 | switch (k->type) { |
| 838 | case KEY_RSA1: |
| 839 | case KEY_RSA: |
| 840 | if ((pk->rsa = RSA_new()) == NULL) |
| 841 | fatal("key_demote: RSA_new failed"); |
| 842 | if ((pk->rsa->e = BN_dup(k->rsa->e)) == NULL) |
| 843 | fatal("key_demote: BN_dup failed"); |
| 844 | if ((pk->rsa->n = BN_dup(k->rsa->n)) == NULL) |
| 845 | fatal("key_demote: BN_dup failed"); |
| 846 | break; |
| 847 | case KEY_DSA: |
| 848 | if ((pk->dsa = DSA_new()) == NULL) |
| 849 | fatal("key_demote: DSA_new failed"); |
| 850 | if ((pk->dsa->p = BN_dup(k->dsa->p)) == NULL) |
| 851 | fatal("key_demote: BN_dup failed"); |
| 852 | if ((pk->dsa->q = BN_dup(k->dsa->q)) == NULL) |
| 853 | fatal("key_demote: BN_dup failed"); |
| 854 | if ((pk->dsa->g = BN_dup(k->dsa->g)) == NULL) |
| 855 | fatal("key_demote: BN_dup failed"); |
| 856 | if ((pk->dsa->pub_key = BN_dup(k->dsa->pub_key)) == NULL) |
| 857 | fatal("key_demote: BN_dup failed"); |
| 858 | break; |
| 859 | default: |
| 860 | fatal("key_free: bad key type %d", k->type); |
| 861 | break; |
| 862 | } |
| 863 | |
| 864 | return (pk); |
| 865 | } |