Annotation of src/usr.bin/ssh/auth2.c, Revision 1.49
1.1 markus 1: /*
2: * Copyright (c) 2000 Markus Friedl. All rights reserved.
3: *
4: * Redistribution and use in source and binary forms, with or without
5: * modification, are permitted provided that the following conditions
6: * are met:
7: * 1. Redistributions of source code must retain the above copyright
8: * notice, this list of conditions and the following disclaimer.
9: * 2. Redistributions in binary form must reproduce the above copyright
10: * notice, this list of conditions and the following disclaimer in the
11: * documentation and/or other materials provided with the distribution.
12: *
13: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23: */
1.14 deraadt 24:
1.1 markus 25: #include "includes.h"
1.49 ! markus 26: RCSID("$OpenBSD: auth2.c,v 1.48 2001/03/21 11:43:44 markus Exp $");
1.1 markus 27:
28: #include <openssl/evp.h>
29:
1.32 markus 30: #include "ssh2.h"
1.1 markus 31: #include "xmalloc.h"
32: #include "rsa.h"
1.45 djm 33: #include "sshpty.h"
1.1 markus 34: #include "packet.h"
35: #include "buffer.h"
1.32 markus 36: #include "log.h"
1.1 markus 37: #include "servconf.h"
38: #include "compat.h"
39: #include "channels.h"
40: #include "bufaux.h"
41: #include "auth.h"
42: #include "session.h"
43: #include "dispatch.h"
44: #include "key.h"
1.32 markus 45: #include "cipher.h"
46: #include "kex.h"
1.29 markus 47: #include "pathnames.h"
1.1 markus 48: #include "uidswap.h"
1.10 markus 49: #include "auth-options.h"
1.43 markus 50: #include "misc.h"
1.1 markus 51:
52: /* import */
53: extern ServerOptions options;
1.23 markus 54: extern u_char *session_id2;
1.1 markus 55: extern int session_id2_len;
56:
1.18 markus 57: static Authctxt *x_authctxt = NULL;
58: static int one = 1;
59:
60: typedef struct Authmethod Authmethod;
61: struct Authmethod {
62: char *name;
63: int (*userauth)(Authctxt *authctxt);
64: int *enabled;
65: };
66:
1.1 markus 67: /* protocol */
68:
1.15 markus 69: void input_service_request(int type, int plen, void *ctxt);
70: void input_userauth_request(int type, int plen, void *ctxt);
71: void protocol_error(int type, int plen, void *ctxt);
1.1 markus 72:
73: /* helper */
1.18 markus 74: Authmethod *authmethod_lookup(const char *name);
1.21 markus 75: int user_key_allowed(struct passwd *pw, Key *key);
1.18 markus 76: char *authmethods_get(void);
1.1 markus 77:
1.18 markus 78: /* auth */
1.25 markus 79: void userauth_banner(void);
1.49 ! markus 80: void userauth_reply(Authctxt *authctxt, int authenticated);
1.18 markus 81: int userauth_none(Authctxt *authctxt);
82: int userauth_passwd(Authctxt *authctxt);
83: int userauth_pubkey(Authctxt *authctxt);
84: int userauth_kbdint(Authctxt *authctxt);
85:
86: Authmethod authmethods[] = {
87: {"none",
88: userauth_none,
89: &one},
90: {"publickey",
91: userauth_pubkey,
1.21 markus 92: &options.pubkey_authentication},
1.40 markus 93: {"password",
94: userauth_passwd,
95: &options.password_authentication},
1.18 markus 96: {"keyboard-interactive",
97: userauth_kbdint,
98: &options.kbd_interactive_authentication},
99: {NULL, NULL, NULL}
1.1 markus 100: };
101:
102: /*
1.18 markus 103: * loop until authctxt->success == TRUE
1.1 markus 104: */
105:
106: void
107: do_authentication2()
108: {
1.28 markus 109: Authctxt *authctxt = authctxt_new();
110:
1.18 markus 111: x_authctxt = authctxt; /*XXX*/
112:
1.34 markus 113: /* challenge-reponse is implemented via keyboard interactive */
114: if (options.challenge_reponse_authentication)
115: options.kbd_interactive_authentication = 1;
116:
1.1 markus 117: dispatch_init(&protocol_error);
118: dispatch_set(SSH2_MSG_SERVICE_REQUEST, &input_service_request);
1.18 markus 119: dispatch_run(DISPATCH_BLOCK, &authctxt->success, authctxt);
1.48 markus 120: do_authenticated(authctxt);
1.1 markus 121: }
122:
123: void
1.15 markus 124: protocol_error(int type, int plen, void *ctxt)
1.1 markus 125: {
126: log("auth: protocol error: type %d plen %d", type, plen);
127: packet_start(SSH2_MSG_UNIMPLEMENTED);
128: packet_put_int(0);
129: packet_send();
130: packet_write_wait();
131: }
132:
133: void
1.15 markus 134: input_service_request(int type, int plen, void *ctxt)
1.1 markus 135: {
1.18 markus 136: Authctxt *authctxt = ctxt;
1.23 markus 137: u_int len;
1.1 markus 138: int accept = 0;
139: char *service = packet_get_string(&len);
140: packet_done();
141:
1.18 markus 142: if (authctxt == NULL)
143: fatal("input_service_request: no authctxt");
144:
1.1 markus 145: if (strcmp(service, "ssh-userauth") == 0) {
1.18 markus 146: if (!authctxt->success) {
1.1 markus 147: accept = 1;
148: /* now we can handle user-auth requests */
149: dispatch_set(SSH2_MSG_USERAUTH_REQUEST, &input_userauth_request);
150: }
151: }
152: /* XXX all other service requests are denied */
153:
154: if (accept) {
155: packet_start(SSH2_MSG_SERVICE_ACCEPT);
156: packet_put_cstring(service);
157: packet_send();
158: packet_write_wait();
159: } else {
160: debug("bad service request %s", service);
161: packet_disconnect("bad service request %s", service);
162: }
163: xfree(service);
164: }
165:
166: void
1.15 markus 167: input_userauth_request(int type, int plen, void *ctxt)
1.1 markus 168: {
1.18 markus 169: Authctxt *authctxt = ctxt;
170: Authmethod *m = NULL;
1.28 markus 171: char *user, *service, *method, *style = NULL;
1.1 markus 172: int authenticated = 0;
173:
1.18 markus 174: if (authctxt == NULL)
175: fatal("input_userauth_request: no authctxt");
1.1 markus 176:
1.18 markus 177: user = packet_get_string(NULL);
178: service = packet_get_string(NULL);
179: method = packet_get_string(NULL);
1.1 markus 180: debug("userauth-request for user %s service %s method %s", user, service, method);
1.24 markus 181: debug("attempt %d failures %d", authctxt->attempt, authctxt->failures);
1.1 markus 182:
1.28 markus 183: if ((style = strchr(user, ':')) != NULL)
184: *style++ = 0;
185:
1.36 stevesk 186: if (authctxt->attempt++ == 0) {
1.18 markus 187: /* setup auth context */
188: struct passwd *pw = NULL;
189: pw = getpwnam(user);
190: if (pw && allowed_user(pw) && strcmp(service, "ssh-connection")==0) {
191: authctxt->pw = pwcopy(pw);
192: authctxt->valid = 1;
193: debug2("input_userauth_request: setting up authctxt for %s", user);
194: } else {
195: log("input_userauth_request: illegal user %s", user);
196: }
1.42 markus 197: setproctitle("%s", pw ? user : "unknown");
1.18 markus 198: authctxt->user = xstrdup(user);
199: authctxt->service = xstrdup(service);
1.28 markus 200: authctxt->style = style ? xstrdup(style) : NULL; /* currently unused */
1.18 markus 201: } else if (authctxt->valid) {
202: if (strcmp(user, authctxt->user) != 0 ||
203: strcmp(service, authctxt->service) != 0) {
204: log("input_userauth_request: missmatch: (%s,%s)!=(%s,%s)",
205: user, service, authctxt->user, authctxt->service);
206: authctxt->valid = 0;
1.1 markus 207: }
208: }
1.28 markus 209: /* reset state */
210: dispatch_set(SSH2_MSG_USERAUTH_INFO_RESPONSE, &protocol_error);
211: authctxt->postponed = 0;
1.47 markus 212: #ifdef BSD_AUTH
213: if (authctxt->as) {
214: auth_close(authctxt->as);
215: authctxt->as = NULL;
216: }
217: #endif
1.18 markus 218:
1.28 markus 219: /* try to authenticate user */
1.18 markus 220: m = authmethod_lookup(method);
221: if (m != NULL) {
222: debug2("input_userauth_request: try method %s", method);
223: authenticated = m->userauth(authctxt);
224: }
1.49 ! markus 225: userauth_finish(authctxt, authenticated, method);
! 226:
! 227: xfree(service);
! 228: xfree(user);
! 229: xfree(method);
! 230: }
! 231:
! 232: void
! 233: userauth_finish(Authctxt *authctxt, int authenticated, char *method)
! 234: {
1.28 markus 235: if (!authctxt->valid && authenticated)
236: fatal("INTERNAL ERROR: authenticated invalid user %s",
237: authctxt->user);
1.18 markus 238:
239: /* Special handling for root */
1.41 markus 240: if (authenticated && authctxt->pw->pw_uid == 0 &&
241: !auth_root_allowed(method))
1.3 markus 242: authenticated = 0;
243:
1.18 markus 244: /* Log before sending the reply */
1.28 markus 245: auth_log(authctxt, authenticated, method, " ssh2");
246:
247: if (!authctxt->postponed)
248: userauth_reply(authctxt, authenticated);
1.18 markus 249: }
250:
1.25 markus 251: void
252: userauth_banner(void)
253: {
254: struct stat st;
255: char *banner = NULL;
256: off_t len, n;
257: int fd;
258:
259: if (options.banner == NULL || (datafellows & SSH_BUG_BANNER))
260: return;
261: if ((fd = open(options.banner, O_RDONLY)) < 0) {
262: error("userauth_banner: open %s failed: %s",
263: options.banner, strerror(errno));
264: return;
265: }
266: if (fstat(fd, &st) < 0)
267: goto done;
268: len = st.st_size;
269: banner = xmalloc(len + 1);
270: if ((n = read(fd, banner, len)) < 0)
271: goto done;
272: banner[n] = '\0';
273: packet_start(SSH2_MSG_USERAUTH_BANNER);
274: packet_put_cstring(banner);
275: packet_put_cstring(""); /* language, unused */
276: packet_send();
277: debug("userauth_banner: sent");
278: done:
279: if (banner)
280: xfree(banner);
281: close(fd);
282: return;
283: }
1.18 markus 284:
1.36 stevesk 285: void
1.18 markus 286: userauth_reply(Authctxt *authctxt, int authenticated)
287: {
1.24 markus 288: char *methods;
1.28 markus 289:
1.3 markus 290: /* XXX todo: check if multiple auth methods are needed */
1.39 markus 291: if (authenticated == 1) {
1.1 markus 292: /* turn off userauth */
293: dispatch_set(SSH2_MSG_USERAUTH_REQUEST, &protocol_error);
294: packet_start(SSH2_MSG_USERAUTH_SUCCESS);
295: packet_send();
296: packet_write_wait();
297: /* now we can break out */
1.18 markus 298: authctxt->success = 1;
1.28 markus 299: } else {
300: if (authctxt->failures++ > AUTH_FAIL_MAX)
1.36 stevesk 301: packet_disconnect(AUTH_FAIL_MSG, authctxt->user);
1.24 markus 302: methods = authmethods_get();
1.1 markus 303: packet_start(SSH2_MSG_USERAUTH_FAILURE);
1.18 markus 304: packet_put_cstring(methods);
305: packet_put_char(0); /* XXX partial success, unused */
1.1 markus 306: packet_send();
307: packet_write_wait();
1.18 markus 308: xfree(methods);
1.1 markus 309: }
310: }
311:
312: int
1.18 markus 313: userauth_none(Authctxt *authctxt)
1.1 markus 314: {
1.18 markus 315: /* disable method "none", only allowed one time */
316: Authmethod *m = authmethod_lookup("none");
317: if (m != NULL)
318: m->enabled = NULL;
1.1 markus 319: packet_done();
1.25 markus 320: userauth_banner();
1.47 markus 321: return authctxt->valid ? auth_password(authctxt, "") : 0;
1.1 markus 322: }
1.18 markus 323:
1.1 markus 324: int
1.18 markus 325: userauth_passwd(Authctxt *authctxt)
1.1 markus 326: {
327: char *password;
328: int authenticated = 0;
329: int change;
1.23 markus 330: u_int len;
1.1 markus 331: change = packet_get_char();
332: if (change)
333: log("password change not supported");
334: password = packet_get_string(&len);
335: packet_done();
1.18 markus 336: if (authctxt->valid &&
1.47 markus 337: auth_password(authctxt, password) == 1)
1.1 markus 338: authenticated = 1;
339: memset(password, 0, len);
340: xfree(password);
341: return authenticated;
342: }
1.18 markus 343:
344: int
345: userauth_kbdint(Authctxt *authctxt)
346: {
347: int authenticated = 0;
348: char *lang = NULL;
349: char *devs = NULL;
350:
351: lang = packet_get_string(NULL);
352: devs = packet_get_string(NULL);
353: packet_done();
354:
355: debug("keyboard-interactive language %s devs %s", lang, devs);
1.28 markus 356:
1.34 markus 357: if (options.challenge_reponse_authentication)
358: authenticated = auth2_challenge(authctxt, devs);
1.28 markus 359:
1.18 markus 360: xfree(lang);
361: xfree(devs);
362: return authenticated;
363: }
364:
1.1 markus 365: int
1.18 markus 366: userauth_pubkey(Authctxt *authctxt)
1.1 markus 367: {
368: Buffer b;
369: Key *key;
370: char *pkalg, *pkblob, *sig;
1.23 markus 371: u_int alen, blen, slen;
1.21 markus 372: int have_sig, pktype;
1.1 markus 373: int authenticated = 0;
374:
1.18 markus 375: if (!authctxt->valid) {
376: debug2("userauth_pubkey: disabled because of invalid user");
1.8 markus 377: return 0;
378: }
1.1 markus 379: have_sig = packet_get_char();
1.22 markus 380: if (datafellows & SSH_BUG_PKAUTH) {
381: debug2("userauth_pubkey: SSH_BUG_PKAUTH");
382: /* no explicit pkalg given */
383: pkblob = packet_get_string(&blen);
384: buffer_init(&b);
385: buffer_append(&b, pkblob, blen);
386: /* so we have to extract the pkalg from the pkblob */
387: pkalg = buffer_get_string(&b, &alen);
388: buffer_free(&b);
389: } else {
390: pkalg = packet_get_string(&alen);
391: pkblob = packet_get_string(&blen);
392: }
1.21 markus 393: pktype = key_type_from_name(pkalg);
394: if (pktype == KEY_UNSPEC) {
1.22 markus 395: /* this is perfectly legal */
396: log("userauth_pubkey: unsupported public key algorithm: %s", pkalg);
1.1 markus 397: xfree(pkalg);
1.22 markus 398: xfree(pkblob);
1.1 markus 399: return 0;
400: }
1.21 markus 401: key = key_from_blob(pkblob, blen);
1.2 markus 402: if (key != NULL) {
403: if (have_sig) {
404: sig = packet_get_string(&slen);
405: packet_done();
406: buffer_init(&b);
1.20 markus 407: if (datafellows & SSH_OLD_SESSIONID) {
408: buffer_append(&b, session_id2, session_id2_len);
409: } else {
1.11 markus 410: buffer_put_string(&b, session_id2, session_id2_len);
411: }
1.9 markus 412: /* reconstruct packet */
1.2 markus 413: buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST);
1.18 markus 414: buffer_put_cstring(&b, authctxt->user);
1.9 markus 415: buffer_put_cstring(&b,
1.22 markus 416: datafellows & SSH_BUG_PKSERVICE ?
1.9 markus 417: "ssh-userauth" :
1.18 markus 418: authctxt->service);
1.22 markus 419: if (datafellows & SSH_BUG_PKAUTH) {
420: buffer_put_char(&b, have_sig);
421: } else {
422: buffer_put_cstring(&b, "publickey");
423: buffer_put_char(&b, have_sig);
424: buffer_put_cstring(&b, key_ssh_name(key));
425: }
1.9 markus 426: buffer_put_string(&b, pkblob, blen);
1.21 markus 427: #ifdef DEBUG_PK
1.2 markus 428: buffer_dump(&b);
1.1 markus 429: #endif
1.2 markus 430: /* test for correct signature */
1.21 markus 431: if (user_key_allowed(authctxt->pw, key) &&
432: key_verify(key, sig, slen, buffer_ptr(&b), buffer_len(&b)) == 1)
1.2 markus 433: authenticated = 1;
434: buffer_clear(&b);
435: xfree(sig);
436: } else {
1.18 markus 437: debug("test whether pkalg/pkblob are acceptable");
1.2 markus 438: packet_done();
1.18 markus 439:
1.2 markus 440: /* XXX fake reply and always send PK_OK ? */
1.6 markus 441: /*
442: * XXX this allows testing whether a user is allowed
443: * to login: if you happen to have a valid pubkey this
444: * message is sent. the message is NEVER sent at all
445: * if a user is not allowed to login. is this an
446: * issue? -markus
447: */
1.21 markus 448: if (user_key_allowed(authctxt->pw, key)) {
1.2 markus 449: packet_start(SSH2_MSG_USERAUTH_PK_OK);
450: packet_put_string(pkalg, alen);
451: packet_put_string(pkblob, blen);
452: packet_send();
453: packet_write_wait();
1.38 markus 454: authctxt->postponed = 1;
1.2 markus 455: }
1.1 markus 456: }
1.17 markus 457: if (authenticated != 1)
458: auth_clear_options();
1.2 markus 459: key_free(key);
1.1 markus 460: }
1.21 markus 461: debug2("userauth_pubkey: authenticated %d pkalg %s", authenticated, pkalg);
1.1 markus 462: xfree(pkalg);
463: xfree(pkblob);
464: return authenticated;
465: }
466:
1.18 markus 467: /* get current user */
1.1 markus 468:
469: struct passwd*
470: auth_get_user(void)
471: {
1.18 markus 472: return (x_authctxt != NULL && x_authctxt->valid) ? x_authctxt->pw : NULL;
1.1 markus 473: }
474:
1.18 markus 475: #define DELIM ","
476:
477: char *
478: authmethods_get(void)
1.1 markus 479: {
1.18 markus 480: Authmethod *method = NULL;
1.23 markus 481: u_int size = 0;
1.18 markus 482: char *list;
1.1 markus 483:
1.18 markus 484: for (method = authmethods; method->name != NULL; method++) {
485: if (strcmp(method->name, "none") == 0)
486: continue;
487: if (method->enabled != NULL && *(method->enabled) != 0) {
488: if (size != 0)
489: size += strlen(DELIM);
490: size += strlen(method->name);
1.1 markus 491: }
1.18 markus 492: }
493: size++; /* trailing '\0' */
494: list = xmalloc(size);
495: list[0] = '\0';
496:
497: for (method = authmethods; method->name != NULL; method++) {
498: if (strcmp(method->name, "none") == 0)
499: continue;
500: if (method->enabled != NULL && *(method->enabled) != 0) {
501: if (list[0] != '\0')
502: strlcat(list, DELIM, size);
503: strlcat(list, method->name, size);
1.1 markus 504: }
505: }
1.18 markus 506: return list;
507: }
508:
509: Authmethod *
510: authmethod_lookup(const char *name)
511: {
512: Authmethod *method = NULL;
513: if (name != NULL)
514: for (method = authmethods; method->name != NULL; method++)
515: if (method->enabled != NULL &&
516: *(method->enabled) != 0 &&
517: strcmp(name, method->name) == 0)
518: return method;
519: debug2("Unrecognized authentication method name: %s", name ? name : "NULL");
520: return NULL;
1.1 markus 521: }
522:
523: /* return 1 if user allows given key */
524: int
1.21 markus 525: user_key_allowed(struct passwd *pw, Key *key)
1.1 markus 526: {
1.31 markus 527: char line[8192], file[MAXPATHLEN];
1.1 markus 528: int found_key = 0;
529: FILE *f;
1.23 markus 530: u_long linenum = 0;
1.1 markus 531: struct stat st;
532: Key *found;
533:
1.18 markus 534: if (pw == NULL)
535: return 0;
536:
1.1 markus 537: /* Temporarily use the user's uid. */
538: temporarily_use_uid(pw->pw_uid);
539:
540: /* The authorized keys. */
541: snprintf(file, sizeof file, "%.500s/%.100s", pw->pw_dir,
1.29 markus 542: _PATH_SSH_USER_PERMITTED_KEYS2);
1.1 markus 543:
544: /* Fail quietly if file does not exist */
545: if (stat(file, &st) < 0) {
546: /* Restore the privileged uid. */
547: restore_uid();
548: return 0;
549: }
550: /* Open the file containing the authorized keys. */
551: f = fopen(file, "r");
552: if (!f) {
553: /* Restore the privileged uid. */
554: restore_uid();
555: return 0;
556: }
557: if (options.strict_modes) {
558: int fail = 0;
559: char buf[1024];
560: /* Check open file in order to avoid open/stat races */
561: if (fstat(fileno(f), &st) < 0 ||
562: (st.st_uid != 0 && st.st_uid != pw->pw_uid) ||
563: (st.st_mode & 022) != 0) {
1.16 markus 564: snprintf(buf, sizeof buf,
565: "%s authentication refused for %.100s: "
566: "bad ownership or modes for '%s'.",
567: key_type(key), pw->pw_name, file);
1.1 markus 568: fail = 1;
569: } else {
1.29 markus 570: /* Check path to _PATH_SSH_USER_PERMITTED_KEYS */
1.1 markus 571: int i;
572: static const char *check[] = {
1.29 markus 573: "", _PATH_SSH_USER_DIR, NULL
1.1 markus 574: };
575: for (i = 0; check[i]; i++) {
576: snprintf(line, sizeof line, "%.500s/%.100s",
577: pw->pw_dir, check[i]);
578: if (stat(line, &st) < 0 ||
579: (st.st_uid != 0 && st.st_uid != pw->pw_uid) ||
580: (st.st_mode & 022) != 0) {
581: snprintf(buf, sizeof buf,
1.16 markus 582: "%s authentication refused for %.100s: "
1.1 markus 583: "bad ownership or modes for '%s'.",
1.16 markus 584: key_type(key), pw->pw_name, line);
1.1 markus 585: fail = 1;
586: break;
587: }
588: }
589: }
590: if (fail) {
591: fclose(f);
1.44 deraadt 592: log("%s", buf);
1.1 markus 593: restore_uid();
594: return 0;
595: }
596: }
597: found_key = 0;
1.16 markus 598: found = key_new(key->type);
1.1 markus 599:
600: while (fgets(line, sizeof(line), f)) {
1.10 markus 601: char *cp, *options = NULL;
1.1 markus 602: linenum++;
603: /* Skip leading whitespace, empty and comment lines. */
604: for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
605: ;
606: if (!*cp || *cp == '\n' || *cp == '#')
607: continue;
1.10 markus 608:
1.21 markus 609: if (key_read(found, &cp) == -1) {
1.10 markus 610: /* no key? check if there are options for this key */
611: int quoted = 0;
1.21 markus 612: debug2("user_key_allowed: check options: '%s'", cp);
1.10 markus 613: options = cp;
614: for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) {
615: if (*cp == '\\' && cp[1] == '"')
616: cp++; /* Skip both */
617: else if (*cp == '"')
618: quoted = !quoted;
619: }
620: /* Skip remaining whitespace. */
621: for (; *cp == ' ' || *cp == '\t'; cp++)
622: ;
1.21 markus 623: if (key_read(found, &cp) == -1) {
624: debug2("user_key_allowed: advance: '%s'", cp);
1.10 markus 625: /* still no key? advance to next line*/
626: continue;
627: }
628: }
629: if (key_equal(found, key) &&
1.30 markus 630: auth_parse_options(pw, options, file, linenum) == 1) {
1.1 markus 631: found_key = 1;
632: debug("matching key found: file %s, line %ld",
633: file, linenum);
634: break;
635: }
636: }
637: restore_uid();
638: fclose(f);
639: key_free(found);
1.46 markus 640: if (!found_key)
641: debug2("key not found");
1.1 markus 642: return found_key;
643: }
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