Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame^] | 1 | /* $OpenBSD: hostfile.c,v 1.47 2010/02/26 20:29:54 djm Exp $ */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 2 | /* |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| 5 | * All rights reserved |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 6 | * Functions for manipulating the known hosts files. |
Damien Miller | 4af5130 | 2000-04-16 11:18:38 +1000 | [diff] [blame] | 7 | * |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 8 | * As far as I am concerned, the code I have written for this software |
| 9 | * can be used freely for any purpose. Any derived versions of this |
| 10 | * software must be clearly marked as such, and if the derived work is |
| 11 | * incompatible with the protocol description in the RFC file, it must be |
| 12 | * called by a name other than "ssh" or "Secure Shell". |
| 13 | * |
| 14 | * |
Ben Lindstrom | 4469723 | 2001-07-04 03:32:30 +0000 | [diff] [blame] | 15 | * Copyright (c) 1999, 2000 Markus Friedl. All rights reserved. |
Damien Miller | e4340be | 2000-09-16 13:29:08 +1100 | [diff] [blame] | 16 | * Copyright (c) 1999 Niels Provos. All rights reserved. |
| 17 | * |
| 18 | * Redistribution and use in source and binary forms, with or without |
| 19 | * modification, are permitted provided that the following conditions |
| 20 | * are met: |
| 21 | * 1. Redistributions of source code must retain the above copyright |
| 22 | * notice, this list of conditions and the following disclaimer. |
| 23 | * 2. Redistributions in binary form must reproduce the above copyright |
| 24 | * notice, this list of conditions and the following disclaimer in the |
| 25 | * documentation and/or other materials provided with the distribution. |
| 26 | * |
| 27 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 28 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 29 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 30 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 31 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 32 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 33 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 34 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 35 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 36 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 37 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 38 | |
| 39 | #include "includes.h" |
Damien Miller | e177615 | 2005-03-01 21:47:37 +1100 | [diff] [blame] | 40 | |
Damien Miller | 8ec8c3e | 2006-07-10 20:35:38 +1000 | [diff] [blame] | 41 | #include <sys/types.h> |
| 42 | |
| 43 | #include <netinet/in.h> |
| 44 | |
Damien Miller | e177615 | 2005-03-01 21:47:37 +1100 | [diff] [blame] | 45 | #include <openssl/hmac.h> |
| 46 | #include <openssl/sha.h> |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 47 | |
Damien Miller | e7a1e5c | 2006-08-05 11:34:19 +1000 | [diff] [blame] | 48 | #include <resolv.h> |
Damien Miller | ded319c | 2006-09-01 15:38:36 +1000 | [diff] [blame] | 49 | #include <stdarg.h> |
Damien Miller | a7a73ee | 2006-08-05 11:37:59 +1000 | [diff] [blame] | 50 | #include <stdio.h> |
Damien Miller | e7a1e5c | 2006-08-05 11:34:19 +1000 | [diff] [blame] | 51 | #include <stdlib.h> |
| 52 | #include <string.h> |
| 53 | |
Damien Miller | d783435 | 2006-08-05 12:39:39 +1000 | [diff] [blame] | 54 | #include "xmalloc.h" |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 55 | #include "match.h" |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 56 | #include "key.h" |
| 57 | #include "hostfile.h" |
Ben Lindstrom | 226cfa0 | 2001-01-22 05:34:40 +0000 | [diff] [blame] | 58 | #include "log.h" |
Damien Miller | e177615 | 2005-03-01 21:47:37 +1100 | [diff] [blame] | 59 | |
| 60 | static int |
| 61 | extract_salt(const char *s, u_int l, char *salt, size_t salt_len) |
| 62 | { |
| 63 | char *p, *b64salt; |
| 64 | u_int b64len; |
| 65 | int ret; |
| 66 | |
| 67 | if (l < sizeof(HASH_MAGIC) - 1) { |
| 68 | debug2("extract_salt: string too short"); |
| 69 | return (-1); |
| 70 | } |
| 71 | if (strncmp(s, HASH_MAGIC, sizeof(HASH_MAGIC) - 1) != 0) { |
| 72 | debug2("extract_salt: invalid magic identifier"); |
| 73 | return (-1); |
| 74 | } |
| 75 | s += sizeof(HASH_MAGIC) - 1; |
| 76 | l -= sizeof(HASH_MAGIC) - 1; |
| 77 | if ((p = memchr(s, HASH_DELIM, l)) == NULL) { |
| 78 | debug2("extract_salt: missing salt termination character"); |
| 79 | return (-1); |
| 80 | } |
| 81 | |
| 82 | b64len = p - s; |
| 83 | /* Sanity check */ |
| 84 | if (b64len == 0 || b64len > 1024) { |
| 85 | debug2("extract_salt: bad encoded salt length %u", b64len); |
| 86 | return (-1); |
| 87 | } |
| 88 | b64salt = xmalloc(1 + b64len); |
| 89 | memcpy(b64salt, s, b64len); |
| 90 | b64salt[b64len] = '\0'; |
| 91 | |
| 92 | ret = __b64_pton(b64salt, salt, salt_len); |
| 93 | xfree(b64salt); |
| 94 | if (ret == -1) { |
| 95 | debug2("extract_salt: salt decode error"); |
| 96 | return (-1); |
| 97 | } |
| 98 | if (ret != SHA_DIGEST_LENGTH) { |
Darren Tucker | 593bae7 | 2005-11-22 19:43:26 +1100 | [diff] [blame] | 99 | debug2("extract_salt: expected salt len %d, got %d", |
| 100 | SHA_DIGEST_LENGTH, ret); |
Damien Miller | e177615 | 2005-03-01 21:47:37 +1100 | [diff] [blame] | 101 | return (-1); |
| 102 | } |
Darren Tucker | 47eede7 | 2005-03-14 23:08:12 +1100 | [diff] [blame] | 103 | |
Damien Miller | e177615 | 2005-03-01 21:47:37 +1100 | [diff] [blame] | 104 | return (0); |
| 105 | } |
| 106 | |
| 107 | char * |
| 108 | host_hash(const char *host, const char *name_from_hostfile, u_int src_len) |
| 109 | { |
| 110 | const EVP_MD *md = EVP_sha1(); |
| 111 | HMAC_CTX mac_ctx; |
| 112 | char salt[256], result[256], uu_salt[512], uu_result[512]; |
| 113 | static char encoded[1024]; |
| 114 | u_int i, len; |
| 115 | |
| 116 | len = EVP_MD_size(md); |
| 117 | |
| 118 | if (name_from_hostfile == NULL) { |
| 119 | /* Create new salt */ |
| 120 | for (i = 0; i < len; i++) |
| 121 | salt[i] = arc4random(); |
| 122 | } else { |
| 123 | /* Extract salt from known host entry */ |
| 124 | if (extract_salt(name_from_hostfile, src_len, salt, |
| 125 | sizeof(salt)) == -1) |
| 126 | return (NULL); |
| 127 | } |
| 128 | |
| 129 | HMAC_Init(&mac_ctx, salt, len, md); |
| 130 | HMAC_Update(&mac_ctx, host, strlen(host)); |
| 131 | HMAC_Final(&mac_ctx, result, NULL); |
| 132 | HMAC_cleanup(&mac_ctx); |
| 133 | |
Darren Tucker | 47eede7 | 2005-03-14 23:08:12 +1100 | [diff] [blame] | 134 | if (__b64_ntop(salt, len, uu_salt, sizeof(uu_salt)) == -1 || |
Damien Miller | e177615 | 2005-03-01 21:47:37 +1100 | [diff] [blame] | 135 | __b64_ntop(result, len, uu_result, sizeof(uu_result)) == -1) |
| 136 | fatal("host_hash: __b64_ntop failed"); |
| 137 | |
| 138 | snprintf(encoded, sizeof(encoded), "%s%s%c%s", HASH_MAGIC, uu_salt, |
| 139 | HASH_DELIM, uu_result); |
| 140 | |
| 141 | return (encoded); |
| 142 | } |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 143 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 144 | /* |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 145 | * Parses an RSA (number of bits, e, n) or DSA key from a string. Moves the |
| 146 | * pointer over the key. Skips any whitespace at the beginning and at end. |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 147 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 148 | |
Damien Miller | 5b2aea9 | 2001-12-21 12:47:09 +1100 | [diff] [blame] | 149 | int |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 150 | hostfile_read_key(char **cpp, u_int *bitsp, Key *ret) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 151 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 152 | char *cp; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 153 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 154 | /* Skip leading whitespace. */ |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 155 | for (cp = *cpp; *cp == ' ' || *cp == '\t'; cp++) |
| 156 | ; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 157 | |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 158 | if (key_read(ret, &cp) != 1) |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 159 | return 0; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 160 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 161 | /* Skip trailing whitespace. */ |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 162 | for (; *cp == ' ' || *cp == '\t'; cp++) |
| 163 | ; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 164 | |
| 165 | /* Return results. */ |
| 166 | *cpp = cp; |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 167 | *bitsp = key_size(ret); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 168 | return 1; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 169 | } |
| 170 | |
Ben Lindstrom | bba8121 | 2001-06-25 05:01:22 +0000 | [diff] [blame] | 171 | static int |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 172 | hostfile_check_key(int bits, const Key *key, const char *host, const char *filename, int linenum) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 173 | { |
Damien Miller | 0bc1bd8 | 2000-11-13 22:57:25 +1100 | [diff] [blame] | 174 | if (key == NULL || key->type != KEY_RSA1 || key->rsa == NULL) |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 175 | return 1; |
| 176 | if (bits != BN_num_bits(key->rsa->n)) { |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 177 | logit("Warning: %s, line %d: keysize mismatch for host %s: " |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 178 | "actual %d vs. announced %d.", |
| 179 | filename, linenum, host, BN_num_bits(key->rsa->n), bits); |
Damien Miller | 996acd2 | 2003-04-09 20:59:48 +1000 | [diff] [blame] | 180 | logit("Warning: replace %d with %d in %s, line %d.", |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 181 | bits, BN_num_bits(key->rsa->n), filename, linenum); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 182 | } |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 183 | return 1; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 184 | } |
| 185 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 186 | /* |
| 187 | * Checks whether the given host (which must be in all lowercase) is already |
| 188 | * in the list of our known hosts. Returns HOST_OK if the host is known and |
| 189 | * has the specified key, HOST_NEW if the host is not known, and HOST_CHANGED |
| 190 | * if the host is known but used to have a different host key. |
Ben Lindstrom | 3ed6640 | 2002-08-01 01:21:56 +0000 | [diff] [blame] | 191 | * |
| 192 | * If no 'key' has been specified and a key of type 'keytype' is known |
| 193 | * for the specified host, then HOST_FOUND is returned. |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 194 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 195 | |
Ben Lindstrom | 3ed6640 | 2002-08-01 01:21:56 +0000 | [diff] [blame] | 196 | static HostStatus |
| 197 | check_host_in_hostfile_by_key_or_type(const char *filename, |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 198 | const char *host, const Key *key, int keytype, Key *found, int *numret) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 199 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 200 | FILE *f; |
| 201 | char line[8192]; |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame^] | 202 | int linenum = 0, want_cert = key_is_cert(key); |
Ben Lindstrom | ab0cedc | 2001-04-07 17:23:43 +0000 | [diff] [blame] | 203 | u_int kbits; |
Damien Miller | e177615 | 2005-03-01 21:47:37 +1100 | [diff] [blame] | 204 | char *cp, *cp2, *hashed_host; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 205 | HostStatus end_return; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 206 | |
Darren Tucker | 1b11888 | 2009-10-24 11:40:32 +1100 | [diff] [blame] | 207 | debug3("check_host_in_hostfile: host %s filename %s", host, filename); |
Ben Lindstrom | 3ed6640 | 2002-08-01 01:21:56 +0000 | [diff] [blame] | 208 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 209 | /* Open the file containing the list of known hosts. */ |
| 210 | f = fopen(filename, "r"); |
| 211 | if (!f) |
| 212 | return HOST_NEW; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 213 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 214 | /* |
| 215 | * Return value when the loop terminates. This is set to |
| 216 | * HOST_CHANGED if we have seen a different key for the host and have |
| 217 | * not found the proper one. |
| 218 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 219 | end_return = HOST_NEW; |
Damien Miller | 7e8e820 | 1999-11-16 13:37:16 +1100 | [diff] [blame] | 220 | |
Ben Lindstrom | ab0cedc | 2001-04-07 17:23:43 +0000 | [diff] [blame] | 221 | /* Go through the file. */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 222 | while (fgets(line, sizeof(line), f)) { |
| 223 | cp = line; |
| 224 | linenum++; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 225 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 226 | /* Skip any leading whitespace, comments and empty lines. */ |
| 227 | for (; *cp == ' ' || *cp == '\t'; cp++) |
| 228 | ; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 229 | if (!*cp || *cp == '#' || *cp == '\n') |
| 230 | continue; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 231 | |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame^] | 232 | /* |
| 233 | * Ignore CA keys when looking for raw keys. |
| 234 | * Ignore raw keys when looking for CA keys. |
| 235 | */ |
| 236 | if (strncasecmp(cp, CA_MARKER, sizeof(CA_MARKER) - 1) == 0 && |
| 237 | (cp[sizeof(CA_MARKER) - 1] == ' ' || |
| 238 | cp[sizeof(CA_MARKER) - 1] == '\t')) { |
| 239 | if (want_cert) { |
| 240 | /* Skip the marker and following whitespace */ |
| 241 | cp += sizeof(CA_MARKER); |
| 242 | for (; *cp == ' ' || *cp == '\t'; cp++) |
| 243 | ; |
| 244 | } else |
| 245 | continue; |
| 246 | } else if (want_cert) |
| 247 | continue; |
| 248 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 249 | /* Find the end of the host name portion. */ |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 250 | for (cp2 = cp; *cp2 && *cp2 != ' ' && *cp2 != '\t'; cp2++) |
| 251 | ; |
Damien Miller | 7e8e820 | 1999-11-16 13:37:16 +1100 | [diff] [blame] | 252 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 253 | /* Check if the host name matches. */ |
Damien Miller | e177615 | 2005-03-01 21:47:37 +1100 | [diff] [blame] | 254 | if (match_hostname(host, cp, (u_int) (cp2 - cp)) != 1) { |
| 255 | if (*cp != HASH_DELIM) |
| 256 | continue; |
| 257 | hashed_host = host_hash(host, cp, (u_int) (cp2 - cp)); |
| 258 | if (hashed_host == NULL) { |
| 259 | debug("Invalid hashed host line %d of %s", |
| 260 | linenum, filename); |
| 261 | continue; |
| 262 | } |
| 263 | if (strncmp(hashed_host, cp, (u_int) (cp2 - cp)) != 0) |
| 264 | continue; |
| 265 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 266 | |
| 267 | /* Got a match. Skip host name. */ |
| 268 | cp = cp2; |
| 269 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 270 | /* |
| 271 | * Extract the key from the line. This will skip any leading |
| 272 | * whitespace. Ignore badly formatted lines. |
| 273 | */ |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 274 | if (!hostfile_read_key(&cp, &kbits, found)) |
| 275 | continue; |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 276 | |
Ben Lindstrom | 46c1622 | 2000-12-22 01:43:59 +0000 | [diff] [blame] | 277 | if (numret != NULL) |
| 278 | *numret = linenum; |
| 279 | |
Ben Lindstrom | 3ed6640 | 2002-08-01 01:21:56 +0000 | [diff] [blame] | 280 | if (key == NULL) { |
| 281 | /* we found a key of the requested type */ |
Damien Miller | 6db780e | 2006-03-26 13:52:20 +1100 | [diff] [blame] | 282 | if (found->type == keytype) { |
| 283 | fclose(f); |
Ben Lindstrom | 3ed6640 | 2002-08-01 01:21:56 +0000 | [diff] [blame] | 284 | return HOST_FOUND; |
Damien Miller | 6db780e | 2006-03-26 13:52:20 +1100 | [diff] [blame] | 285 | } |
Ben Lindstrom | 3ed6640 | 2002-08-01 01:21:56 +0000 | [diff] [blame] | 286 | continue; |
| 287 | } |
| 288 | |
| 289 | if (!hostfile_check_key(kbits, found, host, filename, linenum)) |
| 290 | continue; |
| 291 | |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 292 | /* Check if the current key is the same as the given key. */ |
Damien Miller | 0a80ca1 | 2010-02-27 07:55:05 +1100 | [diff] [blame^] | 293 | if (want_cert && key_equal(key->cert->signature_key, found)) { |
| 294 | /* Found CA cert for key */ |
| 295 | debug3("check_host_in_hostfile: CA match line %d", |
| 296 | linenum); |
| 297 | fclose(f); |
| 298 | return HOST_OK; |
| 299 | } else if (!want_cert && key_equal(key, found)) { |
| 300 | /* Found identical key */ |
Ben Lindstrom | 5eabda3 | 2001-04-12 23:34:34 +0000 | [diff] [blame] | 301 | debug3("check_host_in_hostfile: match line %d", linenum); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 302 | fclose(f); |
| 303 | return HOST_OK; |
| 304 | } |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 305 | /* |
| 306 | * They do not match. We will continue to go through the |
| 307 | * file; however, we note that we will not return that it is |
| 308 | * new. |
| 309 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 310 | end_return = HOST_CHANGED; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 311 | } |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 312 | /* Clear variables and close the file. */ |
| 313 | fclose(f); |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 314 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 315 | /* |
| 316 | * Return either HOST_NEW or HOST_CHANGED, depending on whether we |
| 317 | * saw a different key for the host. |
| 318 | */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 319 | return end_return; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 320 | } |
| 321 | |
Ben Lindstrom | 3ed6640 | 2002-08-01 01:21:56 +0000 | [diff] [blame] | 322 | HostStatus |
Damien Miller | f58b58c | 2003-11-17 21:18:23 +1100 | [diff] [blame] | 323 | check_host_in_hostfile(const char *filename, const char *host, const Key *key, |
Ben Lindstrom | 3ed6640 | 2002-08-01 01:21:56 +0000 | [diff] [blame] | 324 | Key *found, int *numret) |
| 325 | { |
| 326 | if (key == NULL) |
| 327 | fatal("no key to look up"); |
| 328 | return (check_host_in_hostfile_by_key_or_type(filename, host, key, 0, |
| 329 | found, numret)); |
| 330 | } |
| 331 | |
| 332 | int |
| 333 | lookup_key_in_hostfile_by_type(const char *filename, const char *host, |
| 334 | int keytype, Key *found, int *numret) |
| 335 | { |
| 336 | return (check_host_in_hostfile_by_key_or_type(filename, host, NULL, |
| 337 | keytype, found, numret) == HOST_FOUND); |
| 338 | } |
| 339 | |
Damien Miller | 5428f64 | 1999-11-25 11:54:57 +1100 | [diff] [blame] | 340 | /* |
| 341 | * Appends an entry to the host file. Returns false if the entry could not |
| 342 | * be appended. |
| 343 | */ |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 344 | |
| 345 | int |
Darren Tucker | 47eede7 | 2005-03-14 23:08:12 +1100 | [diff] [blame] | 346 | add_host_to_hostfile(const char *filename, const char *host, const Key *key, |
Damien Miller | e177615 | 2005-03-01 21:47:37 +1100 | [diff] [blame] | 347 | int store_hash) |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 348 | { |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 349 | FILE *f; |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 350 | int success = 0; |
Darren Tucker | 4085853 | 2005-08-02 17:07:07 +1000 | [diff] [blame] | 351 | char *hashed_host = NULL; |
Damien Miller | e177615 | 2005-03-01 21:47:37 +1100 | [diff] [blame] | 352 | |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 353 | if (key == NULL) |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 354 | return 1; /* XXX ? */ |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 355 | f = fopen(filename, "a"); |
| 356 | if (!f) |
| 357 | return 0; |
Damien Miller | e177615 | 2005-03-01 21:47:37 +1100 | [diff] [blame] | 358 | |
| 359 | if (store_hash) { |
| 360 | if ((hashed_host = host_hash(host, NULL, 0)) == NULL) { |
| 361 | error("add_host_to_hostfile: host_hash failed"); |
| 362 | fclose(f); |
| 363 | return 0; |
| 364 | } |
| 365 | } |
| 366 | fprintf(f, "%s ", store_hash ? hashed_host : host); |
| 367 | |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 368 | if (key_write(key, f)) { |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 369 | success = 1; |
| 370 | } else { |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 371 | error("add_host_to_hostfile: saving key in %s failed", filename); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 372 | } |
Damien Miller | eba71ba | 2000-04-29 23:57:08 +1000 | [diff] [blame] | 373 | fprintf(f, "\n"); |
Damien Miller | 95def09 | 1999-11-25 00:26:21 +1100 | [diff] [blame] | 374 | fclose(f); |
Damien Miller | 450a7a1 | 2000-03-26 13:04:51 +1000 | [diff] [blame] | 375 | return success; |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 376 | } |