Annotation of src/usr.bin/ssh/hostfile.c, Revision 1.60
1.60 ! djm 1: /* $OpenBSD: hostfile.c,v 1.59 2015/01/15 09:40:00 djm Exp $ */
1.1 deraadt 2: /*
1.8 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * Functions for manipulating the known hosts files.
1.16 markus 7: *
1.20 deraadt 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: *
1.28 markus 15: * Copyright (c) 1999, 2000 Markus Friedl. All rights reserved.
1.20 deraadt 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.
1.8 deraadt 37: */
1.1 deraadt 38:
1.41 stevesk 39: #include <sys/types.h>
40:
41: #include <netinet/in.h>
1.33 djm 42:
1.60 ! djm 43: #include <errno.h>
1.33 djm 44: #include <resolv.h>
1.44 stevesk 45: #include <stdio.h>
1.43 stevesk 46: #include <stdlib.h>
1.42 stevesk 47: #include <string.h>
1.57 djm 48: #include <stdarg.h>
1.1 deraadt 49:
1.45 deraadt 50: #include "xmalloc.h"
1.14 markus 51: #include "match.h"
1.59 djm 52: #include "sshkey.h"
1.14 markus 53: #include "hostfile.h"
1.24 markus 54: #include "log.h"
1.49 djm 55: #include "misc.h"
1.59 djm 56: #include "ssherr.h"
1.53 djm 57: #include "digest.h"
1.54 markus 58: #include "hmac.h"
1.49 djm 59:
60: struct hostkeys {
61: struct hostkey_entry *entries;
62: u_int num_entries;
63: };
1.33 djm 64:
1.60 ! djm 65: /* XXX hmac is too easy to dictionary attack; use bcrypt? */
! 66:
1.33 djm 67: static int
1.52 djm 68: extract_salt(const char *s, u_int l, u_char *salt, size_t salt_len)
1.33 djm 69: {
70: char *p, *b64salt;
71: u_int b64len;
72: int ret;
73:
74: if (l < sizeof(HASH_MAGIC) - 1) {
75: debug2("extract_salt: string too short");
76: return (-1);
77: }
78: if (strncmp(s, HASH_MAGIC, sizeof(HASH_MAGIC) - 1) != 0) {
79: debug2("extract_salt: invalid magic identifier");
80: return (-1);
81: }
82: s += sizeof(HASH_MAGIC) - 1;
83: l -= sizeof(HASH_MAGIC) - 1;
84: if ((p = memchr(s, HASH_DELIM, l)) == NULL) {
85: debug2("extract_salt: missing salt termination character");
86: return (-1);
87: }
88:
89: b64len = p - s;
90: /* Sanity check */
91: if (b64len == 0 || b64len > 1024) {
92: debug2("extract_salt: bad encoded salt length %u", b64len);
93: return (-1);
94: }
95: b64salt = xmalloc(1 + b64len);
96: memcpy(b64salt, s, b64len);
97: b64salt[b64len] = '\0';
98:
99: ret = __b64_pton(b64salt, salt, salt_len);
1.51 djm 100: free(b64salt);
1.33 djm 101: if (ret == -1) {
102: debug2("extract_salt: salt decode error");
103: return (-1);
104: }
1.54 markus 105: if (ret != (int)ssh_hmac_bytes(SSH_DIGEST_SHA1)) {
106: debug2("extract_salt: expected salt len %zd, got %d",
107: ssh_hmac_bytes(SSH_DIGEST_SHA1), ret);
1.33 djm 108: return (-1);
109: }
1.34 deraadt 110:
1.33 djm 111: return (0);
112: }
113:
114: char *
115: host_hash(const char *host, const char *name_from_hostfile, u_int src_len)
116: {
1.54 markus 117: struct ssh_hmac_ctx *ctx;
1.52 djm 118: u_char salt[256], result[256];
119: char uu_salt[512], uu_result[512];
1.33 djm 120: static char encoded[1024];
121: u_int i, len;
122:
1.54 markus 123: len = ssh_digest_bytes(SSH_DIGEST_SHA1);
1.33 djm 124:
125: if (name_from_hostfile == NULL) {
126: /* Create new salt */
127: for (i = 0; i < len; i++)
128: salt[i] = arc4random();
129: } else {
130: /* Extract salt from known host entry */
131: if (extract_salt(name_from_hostfile, src_len, salt,
132: sizeof(salt)) == -1)
133: return (NULL);
134: }
135:
1.54 markus 136: if ((ctx = ssh_hmac_start(SSH_DIGEST_SHA1)) == NULL ||
137: ssh_hmac_init(ctx, salt, len) < 0 ||
138: ssh_hmac_update(ctx, host, strlen(host)) < 0 ||
139: ssh_hmac_final(ctx, result, sizeof(result)))
140: fatal("%s: ssh_hmac failed", __func__);
141: ssh_hmac_free(ctx);
1.33 djm 142:
1.34 deraadt 143: if (__b64_ntop(salt, len, uu_salt, sizeof(uu_salt)) == -1 ||
1.33 djm 144: __b64_ntop(result, len, uu_result, sizeof(uu_result)) == -1)
1.54 markus 145: fatal("%s: __b64_ntop failed", __func__);
1.33 djm 146:
147: snprintf(encoded, sizeof(encoded), "%s%s%c%s", HASH_MAGIC, uu_salt,
148: HASH_DELIM, uu_result);
149:
150: return (encoded);
151: }
1.1 deraadt 152:
1.9 markus 153: /*
1.14 markus 154: * Parses an RSA (number of bits, e, n) or DSA key from a string. Moves the
155: * pointer over the key. Skips any whitespace at the beginning and at end.
1.9 markus 156: */
1.1 deraadt 157:
1.29 jakob 158: int
1.59 djm 159: hostfile_read_key(char **cpp, u_int *bitsp, struct sshkey *ret)
1.1 deraadt 160: {
1.7 markus 161: char *cp;
1.59 djm 162: int r;
1.7 markus 163:
164: /* Skip leading whitespace. */
1.9 markus 165: for (cp = *cpp; *cp == ' ' || *cp == '\t'; cp++)
166: ;
1.1 deraadt 167:
1.59 djm 168: if ((r = sshkey_read(ret, &cp)) != 0)
1.7 markus 169: return 0;
170:
171: /* Skip trailing whitespace. */
1.9 markus 172: for (; *cp == ' ' || *cp == '\t'; cp++)
173: ;
1.7 markus 174:
175: /* Return results. */
176: *cpp = cp;
1.59 djm 177: if (bitsp != NULL)
178: *bitsp = sshkey_size(ret);
1.7 markus 179: return 1;
1.14 markus 180: }
1.1 deraadt 181:
1.27 itojun 182: static int
1.59 djm 183: hostfile_check_key(int bits, const struct sshkey *key, const char *host,
1.49 djm 184: const char *filename, u_long linenum)
1.1 deraadt 185: {
1.56 markus 186: #ifdef WITH_SSH1
1.21 markus 187: if (key == NULL || key->type != KEY_RSA1 || key->rsa == NULL)
1.14 markus 188: return 1;
189: if (bits != BN_num_bits(key->rsa->n)) {
1.49 djm 190: logit("Warning: %s, line %lu: keysize mismatch for host %s: "
1.14 markus 191: "actual %d vs. announced %d.",
192: filename, linenum, host, BN_num_bits(key->rsa->n), bits);
1.49 djm 193: logit("Warning: replace %d with %d in %s, line %lu.",
1.14 markus 194: bits, BN_num_bits(key->rsa->n), filename, linenum);
1.1 deraadt 195: }
1.56 markus 196: #endif
1.14 markus 197: return 1;
1.1 deraadt 198: }
199:
1.49 djm 200: static HostkeyMarker
1.48 djm 201: check_markers(char **cpp)
202: {
203: char marker[32], *sp, *cp = *cpp;
204: int ret = MRK_NONE;
205:
206: while (*cp == '@') {
207: /* Only one marker is allowed */
208: if (ret != MRK_NONE)
209: return MRK_ERROR;
210: /* Markers are terminated by whitespace */
211: if ((sp = strchr(cp, ' ')) == NULL &&
212: (sp = strchr(cp, '\t')) == NULL)
213: return MRK_ERROR;
214: /* Extract marker for comparison */
215: if (sp <= cp + 1 || sp >= cp + sizeof(marker))
216: return MRK_ERROR;
217: memcpy(marker, cp, sp - cp);
218: marker[sp - cp] = '\0';
219: if (strcmp(marker, CA_MARKER) == 0)
220: ret = MRK_CA;
221: else if (strcmp(marker, REVOKE_MARKER) == 0)
222: ret = MRK_REVOKE;
223: else
224: return MRK_ERROR;
225:
226: /* Skip past marker and any whitespace that follows it */
227: cp = sp;
228: for (; *cp == ' ' || *cp == '\t'; cp++)
229: ;
230: }
231: *cpp = cp;
232: return ret;
233: }
234:
1.49 djm 235: struct hostkeys *
236: init_hostkeys(void)
237: {
238: struct hostkeys *ret = xcalloc(1, sizeof(*ret));
239:
240: ret->entries = NULL;
241: return ret;
242: }
1.1 deraadt 243:
1.49 djm 244: void
245: load_hostkeys(struct hostkeys *hostkeys, const char *host, const char *path)
1.1 deraadt 246: {
1.7 markus 247: FILE *f;
248: char line[8192];
1.49 djm 249: u_long linenum = 0, num_loaded = 0;
1.33 djm 250: char *cp, *cp2, *hashed_host;
1.49 djm 251: HostkeyMarker marker;
1.59 djm 252: struct sshkey *key;
253: u_int kbits;
1.49 djm 254:
255: if ((f = fopen(path, "r")) == NULL)
256: return;
257: debug3("%s: loading entries for host \"%.100s\" from file \"%s\"",
258: __func__, host, path);
259: while (read_keyfile_line(f, path, line, sizeof(line), &linenum) == 0) {
1.7 markus 260: cp = line;
261:
1.9 markus 262: /* Skip any leading whitespace, comments and empty lines. */
263: for (; *cp == ' ' || *cp == '\t'; cp++)
264: ;
1.7 markus 265: if (!*cp || *cp == '#' || *cp == '\n')
266: continue;
267:
1.49 djm 268: if ((marker = check_markers(&cp)) == MRK_ERROR) {
269: verbose("%s: invalid marker at %s:%lu",
270: __func__, path, linenum);
1.47 djm 271: continue;
1.49 djm 272: }
1.47 djm 273:
1.7 markus 274: /* Find the end of the host name portion. */
1.9 markus 275: for (cp2 = cp; *cp2 && *cp2 != ' ' && *cp2 != '\t'; cp2++)
276: ;
1.7 markus 277:
278: /* Check if the host name matches. */
1.33 djm 279: if (match_hostname(host, cp, (u_int) (cp2 - cp)) != 1) {
280: if (*cp != HASH_DELIM)
281: continue;
282: hashed_host = host_hash(host, cp, (u_int) (cp2 - cp));
283: if (hashed_host == NULL) {
1.49 djm 284: debug("Invalid hashed host line %lu of %s",
285: linenum, path);
1.33 djm 286: continue;
287: }
288: if (strncmp(hashed_host, cp, (u_int) (cp2 - cp)) != 0)
289: continue;
290: }
1.7 markus 291:
292: /* Got a match. Skip host name. */
293: cp = cp2;
294:
1.9 markus 295: /*
296: * Extract the key from the line. This will skip any leading
297: * whitespace. Ignore badly formatted lines.
298: */
1.59 djm 299: if ((key = sshkey_new(KEY_UNSPEC)) == NULL) {
300: error("%s: sshkey_new failed", __func__);
301: break;
302: }
1.49 djm 303: if (!hostfile_read_key(&cp, &kbits, key)) {
1.59 djm 304: sshkey_free(key);
1.56 markus 305: #ifdef WITH_SSH1
1.59 djm 306: if ((key = sshkey_new(KEY_RSA1)) == NULL) {
307: error("%s: sshkey_new failed", __func__);
308: break;
309: }
1.49 djm 310: if (!hostfile_read_key(&cp, &kbits, key)) {
1.59 djm 311: sshkey_free(key);
1.49 djm 312: continue;
313: }
1.56 markus 314: #else
315: continue;
316: #endif
1.49 djm 317: }
318: if (!hostfile_check_key(kbits, key, host, path, linenum))
1.14 markus 319: continue;
1.23 markus 320:
1.49 djm 321: debug3("%s: found %skey type %s in file %s:%lu", __func__,
322: marker == MRK_NONE ? "" :
323: (marker == MRK_CA ? "ca " : "revoked "),
1.59 djm 324: sshkey_type(key), path, linenum);
1.49 djm 325: hostkeys->entries = xrealloc(hostkeys->entries,
326: hostkeys->num_entries + 1, sizeof(*hostkeys->entries));
327: hostkeys->entries[hostkeys->num_entries].host = xstrdup(host);
328: hostkeys->entries[hostkeys->num_entries].file = xstrdup(path);
329: hostkeys->entries[hostkeys->num_entries].line = linenum;
330: hostkeys->entries[hostkeys->num_entries].key = key;
331: hostkeys->entries[hostkeys->num_entries].marker = marker;
332: hostkeys->num_entries++;
333: num_loaded++;
334: }
335: debug3("%s: loaded %lu keys", __func__, num_loaded);
1.50 djm 336: fclose(f);
1.49 djm 337: return;
1.58 djm 338: }
1.49 djm 339:
340: void
341: free_hostkeys(struct hostkeys *hostkeys)
342: {
343: u_int i;
344:
345: for (i = 0; i < hostkeys->num_entries; i++) {
1.51 djm 346: free(hostkeys->entries[i].host);
347: free(hostkeys->entries[i].file);
1.59 djm 348: sshkey_free(hostkeys->entries[i].key);
1.55 tedu 349: explicit_bzero(hostkeys->entries + i, sizeof(*hostkeys->entries));
1.49 djm 350: }
1.51 djm 351: free(hostkeys->entries);
1.55 tedu 352: explicit_bzero(hostkeys, sizeof(*hostkeys));
1.51 djm 353: free(hostkeys);
1.49 djm 354: }
355:
356: static int
1.59 djm 357: check_key_not_revoked(struct hostkeys *hostkeys, struct sshkey *k)
1.49 djm 358: {
1.59 djm 359: int is_cert = sshkey_is_cert(k);
1.49 djm 360: u_int i;
1.7 markus 361:
1.49 djm 362: for (i = 0; i < hostkeys->num_entries; i++) {
363: if (hostkeys->entries[i].marker != MRK_REVOKE)
1.30 markus 364: continue;
1.59 djm 365: if (sshkey_equal_public(k, hostkeys->entries[i].key))
1.49 djm 366: return -1;
367: if (is_cert &&
1.59 djm 368: sshkey_equal_public(k->cert->signature_key,
1.49 djm 369: hostkeys->entries[i].key))
370: return -1;
371: }
372: return 0;
373: }
374:
375: /*
376: * Match keys against a specified key, or look one up by key type.
377: *
378: * If looking for a keytype (key == NULL) and one is found then return
379: * HOST_FOUND, otherwise HOST_NEW.
380: *
381: * If looking for a key (key != NULL):
382: * 1. If the key is a cert and a matching CA is found, return HOST_OK
383: * 2. If the key is not a cert and a matching key is found, return HOST_OK
384: * 3. If no key matches but a key with a different type is found, then
385: * return HOST_CHANGED
386: * 4. If no matching keys are found, then return HOST_NEW.
387: *
388: * Finally, check any found key is not revoked.
389: */
390: static HostStatus
391: check_hostkeys_by_key_or_type(struct hostkeys *hostkeys,
1.59 djm 392: struct sshkey *k, int keytype, const struct hostkey_entry **found)
1.49 djm 393: {
394: u_int i;
395: HostStatus end_return = HOST_NEW;
1.59 djm 396: int want_cert = sshkey_is_cert(k);
1.49 djm 397: HostkeyMarker want_marker = want_cert ? MRK_CA : MRK_NONE;
398: int proto = (k ? k->type : keytype) == KEY_RSA1 ? 1 : 2;
399:
400: if (found != NULL)
401: *found = NULL;
1.30 markus 402:
1.49 djm 403: for (i = 0; i < hostkeys->num_entries; i++) {
404: if (proto == 1 && hostkeys->entries[i].key->type != KEY_RSA1)
405: continue;
406: if (proto == 2 && hostkeys->entries[i].key->type == KEY_RSA1)
1.30 markus 407: continue;
1.49 djm 408: if (hostkeys->entries[i].marker != want_marker)
409: continue;
410: if (k == NULL) {
411: if (hostkeys->entries[i].key->type != keytype)
412: continue;
413: end_return = HOST_FOUND;
414: if (found != NULL)
415: *found = hostkeys->entries + i;
416: k = hostkeys->entries[i].key;
417: break;
418: }
419: if (want_cert) {
1.59 djm 420: if (sshkey_equal_public(k->cert->signature_key,
1.49 djm 421: hostkeys->entries[i].key)) {
422: /* A matching CA exists */
423: end_return = HOST_OK;
424: if (found != NULL)
425: *found = hostkeys->entries + i;
426: break;
1.48 djm 427: }
1.49 djm 428: } else {
1.59 djm 429: if (sshkey_equal(k, hostkeys->entries[i].key)) {
1.49 djm 430: end_return = HOST_OK;
431: if (found != NULL)
432: *found = hostkeys->entries + i;
433: break;
1.48 djm 434: }
1.49 djm 435: /* A non-maching key exists */
436: end_return = HOST_CHANGED;
437: if (found != NULL)
438: *found = hostkeys->entries + i;
1.48 djm 439: }
1.1 deraadt 440: }
1.49 djm 441: if (check_key_not_revoked(hostkeys, k) != 0) {
442: end_return = HOST_REVOKED;
443: if (found != NULL)
444: *found = NULL;
445: }
1.7 markus 446: return end_return;
1.30 markus 447: }
1.58 djm 448:
1.30 markus 449: HostStatus
1.59 djm 450: check_key_in_hostkeys(struct hostkeys *hostkeys, struct sshkey *key,
1.49 djm 451: const struct hostkey_entry **found)
1.30 markus 452: {
453: if (key == NULL)
454: fatal("no key to look up");
1.49 djm 455: return check_hostkeys_by_key_or_type(hostkeys, key, 0, found);
1.30 markus 456: }
457:
458: int
1.49 djm 459: lookup_key_in_hostkeys_by_type(struct hostkeys *hostkeys, int keytype,
460: const struct hostkey_entry **found)
1.30 markus 461: {
1.49 djm 462: return (check_hostkeys_by_key_or_type(hostkeys, NULL, keytype,
463: found) == HOST_FOUND);
1.1 deraadt 464: }
465:
1.9 markus 466: /*
467: * Appends an entry to the host file. Returns false if the entry could not
468: * be appended.
469: */
1.1 deraadt 470:
1.2 provos 471: int
1.59 djm 472: add_host_to_hostfile(const char *filename, const char *host,
473: const struct sshkey *key, int store_hash)
1.1 deraadt 474: {
1.7 markus 475: FILE *f;
1.59 djm 476: int r, success = 0;
1.35 dtucker 477: char *hashed_host = NULL;
1.33 djm 478:
1.14 markus 479: if (key == NULL)
1.17 markus 480: return 1; /* XXX ? */
1.7 markus 481: f = fopen(filename, "a");
482: if (!f)
483: return 0;
1.33 djm 484:
485: if (store_hash) {
486: if ((hashed_host = host_hash(host, NULL, 0)) == NULL) {
487: error("add_host_to_hostfile: host_hash failed");
488: fclose(f);
489: return 0;
490: }
491: }
492: fprintf(f, "%s ", store_hash ? hashed_host : host);
493:
1.59 djm 494: if ((r = sshkey_write(key, f)) != 0) {
495: error("%s: saving key in %s failed: %s",
496: __func__, filename, ssh_err(r));
497: } else
1.14 markus 498: success = 1;
1.60 ! djm 499: fputc('\n', f);
1.7 markus 500: fclose(f);
1.14 markus 501: return success;
1.60 ! djm 502: }
! 503:
! 504: static int
! 505: match_maybe_hashed(const char *host, const char *names, int *was_hashed)
! 506: {
! 507: int hashed = *names == HASH_DELIM;
! 508: const char *hashed_host;
! 509: size_t nlen = strlen(names);
! 510:
! 511: if (was_hashed != NULL)
! 512: *was_hashed = hashed;
! 513: if (hashed) {
! 514: if ((hashed_host = host_hash(host, names, nlen)) == NULL)
! 515: return -1;
! 516: return nlen == strlen(hashed_host) &&
! 517: strncmp(hashed_host, names, nlen) == 0;
! 518: }
! 519: return match_hostname(host, names, nlen) == 1;
! 520: }
! 521:
! 522: int
! 523: hostkeys_foreach(const char *path, hostkeys_foreach_fn *callback, void *ctx,
! 524: const char *host, u_int options)
! 525: {
! 526: FILE *f;
! 527: char line[8192], oline[8192];
! 528: u_long linenum = 0;
! 529: char *cp, *cp2;
! 530: u_int kbits;
! 531: int s, r = 0;
! 532: struct hostkey_foreach_line lineinfo;
! 533:
! 534: memset(&lineinfo, 0, sizeof(lineinfo));
! 535: if (host == NULL && (options & HKF_WANT_MATCH_HOST) != 0)
! 536: return SSH_ERR_INVALID_ARGUMENT;
! 537: if ((f = fopen(path, "r")) == NULL)
! 538: return SSH_ERR_SYSTEM_ERROR;
! 539:
! 540: debug3("%s: reading file \"%s\"", __func__, path);
! 541: while (read_keyfile_line(f, path, line, sizeof(line), &linenum) == 0) {
! 542: line[strcspn(line, "\n")] = '\0';
! 543: strlcpy(oline, line, sizeof(oline));
! 544:
! 545: sshkey_free(lineinfo.key);
! 546: memset(&lineinfo, 0, sizeof(lineinfo));
! 547: lineinfo.path = path;
! 548: lineinfo.linenum = linenum;
! 549: lineinfo.line = oline;
! 550: lineinfo.status = HKF_STATUS_OK;
! 551:
! 552: /* Skip any leading whitespace, comments and empty lines. */
! 553: for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
! 554: ;
! 555: if (!*cp || *cp == '#' || *cp == '\n') {
! 556: if ((options & HKF_WANT_MATCH_HOST) == 0) {
! 557: lineinfo.status = HKF_STATUS_COMMENT;
! 558: if ((r = callback(&lineinfo, ctx)) != 0)
! 559: break;
! 560: }
! 561: continue;
! 562: }
! 563:
! 564: if ((lineinfo.marker = check_markers(&cp)) == MRK_ERROR) {
! 565: verbose("%s: invalid marker at %s:%lu",
! 566: __func__, path, linenum);
! 567: if ((options & HKF_WANT_MATCH_HOST) == 0)
! 568: goto bad;
! 569: continue;
! 570: }
! 571:
! 572: /* Find the end of the host name portion. */
! 573: for (cp2 = cp; *cp2 && *cp2 != ' ' && *cp2 != '\t'; cp2++)
! 574: ;
! 575: lineinfo.hosts = cp;
! 576: *cp2++ = '\0';
! 577:
! 578: /* Check if the host name matches. */
! 579: if (host != NULL) {
! 580: s = match_maybe_hashed(host, lineinfo.hosts,
! 581: &lineinfo.was_hashed);
! 582: if (s == 1)
! 583: lineinfo.status = HKF_STATUS_HOST_MATCHED;
! 584: else if ((options & HKF_WANT_MATCH_HOST) != 0)
! 585: continue;
! 586: else if (s == -1) {
! 587: debug2("%s: %s:%ld: bad host hash \"%.32s\"",
! 588: __func__, path, linenum, lineinfo.hosts);
! 589: goto bad;
! 590: }
! 591: }
! 592:
! 593: /* Got a match. Skip host name and any following whitespace */
! 594: for (; *cp2 == ' ' || *cp2 == '\t'; cp2++)
! 595: ;
! 596: if (*cp2 == '\0' || *cp2 == '#') {
! 597: debug2("%s:%ld: truncated before key", path, linenum);
! 598: goto bad;
! 599: }
! 600: lineinfo.rawkey = cp = cp2;
! 601:
! 602: if ((options & HKF_WANT_PARSE_KEY) != 0) {
! 603: /*
! 604: * Extract the key from the line. This will skip
! 605: * any leading whitespace. Ignore badly formatted
! 606: * lines.
! 607: */
! 608: if ((lineinfo.key = sshkey_new(KEY_UNSPEC)) == NULL) {
! 609: error("%s: sshkey_new failed", __func__);
! 610: return SSH_ERR_ALLOC_FAIL;
! 611: }
! 612: if (!hostfile_read_key(&cp, &kbits, lineinfo.key)) {
! 613: #ifdef WITH_SSH1
! 614: sshkey_free(lineinfo.key);
! 615: lineinfo.key = sshkey_new(KEY_RSA1);
! 616: if (lineinfo.key == NULL) {
! 617: error("%s: sshkey_new fail", __func__);
! 618: return SSH_ERR_ALLOC_FAIL;
! 619: }
! 620: if (!hostfile_read_key(&cp, &kbits,
! 621: lineinfo.key))
! 622: goto bad;
! 623: #else
! 624: goto bad;
! 625: #endif
! 626: }
! 627: if (!hostfile_check_key(kbits, lineinfo.key, host,
! 628: path, linenum)) {
! 629: bad:
! 630: lineinfo.status = HKF_STATUS_INVALID;
! 631: if ((r = callback(&lineinfo, ctx)) != 0)
! 632: break;
! 633: continue;
! 634: }
! 635: }
! 636: if ((r = callback(&lineinfo, ctx)) != 0)
! 637: break;
! 638: }
! 639: sshkey_free(lineinfo.key);
! 640: fclose(f);
! 641: return r;
1.1 deraadt 642: }
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