Annotation of src/usr.bin/ssh/auth2.c, Revision 1.41
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"
1.41 ! markus 26: RCSID("$OpenBSD: auth2.c,v 1.40 2001/02/10 12:52:02 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"
33: #include "pty.h"
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"
1.1 markus 50:
51: /* import */
52: extern ServerOptions options;
1.23 markus 53: extern u_char *session_id2;
1.1 markus 54: extern int session_id2_len;
55:
1.18 markus 56: static Authctxt *x_authctxt = NULL;
57: static int one = 1;
58:
59: typedef struct Authmethod Authmethod;
60: struct Authmethod {
61: char *name;
62: int (*userauth)(Authctxt *authctxt);
63: int *enabled;
64: };
65:
1.1 markus 66: /* protocol */
67:
1.15 markus 68: void input_service_request(int type, int plen, void *ctxt);
69: void input_userauth_request(int type, int plen, void *ctxt);
70: void protocol_error(int type, int plen, void *ctxt);
1.1 markus 71:
72: /* helper */
1.18 markus 73: Authmethod *authmethod_lookup(const char *name);
74: struct passwd *pwcopy(struct passwd *pw);
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);
1.18 markus 80: int userauth_none(Authctxt *authctxt);
81: int userauth_passwd(Authctxt *authctxt);
82: int userauth_pubkey(Authctxt *authctxt);
83: int userauth_kbdint(Authctxt *authctxt);
84:
85: Authmethod authmethods[] = {
86: {"none",
87: userauth_none,
88: &one},
89: {"publickey",
90: userauth_pubkey,
1.21 markus 91: &options.pubkey_authentication},
1.40 markus 92: {"password",
93: userauth_passwd,
94: &options.password_authentication},
1.18 markus 95: {"keyboard-interactive",
96: userauth_kbdint,
97: &options.kbd_interactive_authentication},
98: {NULL, NULL, NULL}
1.1 markus 99: };
100:
101: /*
1.18 markus 102: * loop until authctxt->success == TRUE
1.1 markus 103: */
104:
105: void
106: do_authentication2()
107: {
1.28 markus 108: Authctxt *authctxt = authctxt_new();
109:
1.18 markus 110: x_authctxt = authctxt; /*XXX*/
111:
1.34 markus 112: /* challenge-reponse is implemented via keyboard interactive */
113: if (options.challenge_reponse_authentication)
114: options.kbd_interactive_authentication = 1;
115:
1.1 markus 116: dispatch_init(&protocol_error);
117: dispatch_set(SSH2_MSG_SERVICE_REQUEST, &input_service_request);
1.18 markus 118: dispatch_run(DISPATCH_BLOCK, &authctxt->success, authctxt);
1.28 markus 119: do_authenticated2(authctxt);
1.1 markus 120: }
121:
122: void
1.15 markus 123: protocol_error(int type, int plen, void *ctxt)
1.1 markus 124: {
125: log("auth: protocol error: type %d plen %d", type, plen);
126: packet_start(SSH2_MSG_UNIMPLEMENTED);
127: packet_put_int(0);
128: packet_send();
129: packet_write_wait();
130: }
131:
132: void
1.15 markus 133: input_service_request(int type, int plen, void *ctxt)
1.1 markus 134: {
1.18 markus 135: Authctxt *authctxt = ctxt;
1.23 markus 136: u_int len;
1.1 markus 137: int accept = 0;
138: char *service = packet_get_string(&len);
139: packet_done();
140:
1.18 markus 141: if (authctxt == NULL)
142: fatal("input_service_request: no authctxt");
143:
1.1 markus 144: if (strcmp(service, "ssh-userauth") == 0) {
1.18 markus 145: if (!authctxt->success) {
1.1 markus 146: accept = 1;
147: /* now we can handle user-auth requests */
148: dispatch_set(SSH2_MSG_USERAUTH_REQUEST, &input_userauth_request);
149: }
150: }
151: /* XXX all other service requests are denied */
152:
153: if (accept) {
154: packet_start(SSH2_MSG_SERVICE_ACCEPT);
155: packet_put_cstring(service);
156: packet_send();
157: packet_write_wait();
158: } else {
159: debug("bad service request %s", service);
160: packet_disconnect("bad service request %s", service);
161: }
162: xfree(service);
163: }
164:
165: void
1.15 markus 166: input_userauth_request(int type, int plen, void *ctxt)
1.1 markus 167: {
1.18 markus 168: Authctxt *authctxt = ctxt;
169: Authmethod *m = NULL;
1.28 markus 170: char *user, *service, *method, *style = NULL;
1.1 markus 171: int authenticated = 0;
172:
1.18 markus 173: if (authctxt == NULL)
174: fatal("input_userauth_request: no authctxt");
1.1 markus 175:
1.18 markus 176: user = packet_get_string(NULL);
177: service = packet_get_string(NULL);
178: method = packet_get_string(NULL);
1.1 markus 179: debug("userauth-request for user %s service %s method %s", user, service, method);
1.24 markus 180: debug("attempt %d failures %d", authctxt->attempt, authctxt->failures);
1.1 markus 181:
1.28 markus 182: if ((style = strchr(user, ':')) != NULL)
183: *style++ = 0;
184:
1.36 stevesk 185: if (authctxt->attempt++ == 0) {
1.18 markus 186: /* setup auth context */
187: struct passwd *pw = NULL;
188: setproctitle("%s", user);
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: }
197: authctxt->user = xstrdup(user);
198: authctxt->service = xstrdup(service);
1.28 markus 199: authctxt->style = style ? xstrdup(style) : NULL; /* currently unused */
1.18 markus 200: } else if (authctxt->valid) {
201: if (strcmp(user, authctxt->user) != 0 ||
202: strcmp(service, authctxt->service) != 0) {
203: log("input_userauth_request: missmatch: (%s,%s)!=(%s,%s)",
204: user, service, authctxt->user, authctxt->service);
205: authctxt->valid = 0;
1.1 markus 206: }
207: }
1.28 markus 208: /* reset state */
209: dispatch_set(SSH2_MSG_USERAUTH_INFO_RESPONSE, &protocol_error);
210: authctxt->postponed = 0;
1.18 markus 211:
1.28 markus 212: /* try to authenticate user */
1.18 markus 213: m = authmethod_lookup(method);
214: if (m != NULL) {
215: debug2("input_userauth_request: try method %s", method);
216: authenticated = m->userauth(authctxt);
217: }
1.28 markus 218: if (!authctxt->valid && authenticated)
219: fatal("INTERNAL ERROR: authenticated invalid user %s",
220: authctxt->user);
1.18 markus 221:
222: /* Special handling for root */
1.41 ! markus 223: if (authenticated && authctxt->pw->pw_uid == 0 &&
! 224: !auth_root_allowed(method))
1.3 markus 225: authenticated = 0;
226:
1.18 markus 227: /* Log before sending the reply */
1.28 markus 228: auth_log(authctxt, authenticated, method, " ssh2");
229:
230: if (!authctxt->postponed)
231: userauth_reply(authctxt, authenticated);
1.18 markus 232:
233: xfree(service);
234: xfree(user);
235: xfree(method);
236: }
237:
1.25 markus 238: void
239: userauth_banner(void)
240: {
241: struct stat st;
242: char *banner = NULL;
243: off_t len, n;
244: int fd;
245:
246: if (options.banner == NULL || (datafellows & SSH_BUG_BANNER))
247: return;
248: if ((fd = open(options.banner, O_RDONLY)) < 0) {
249: error("userauth_banner: open %s failed: %s",
250: options.banner, strerror(errno));
251: return;
252: }
253: if (fstat(fd, &st) < 0)
254: goto done;
255: len = st.st_size;
256: banner = xmalloc(len + 1);
257: if ((n = read(fd, banner, len)) < 0)
258: goto done;
259: banner[n] = '\0';
260: packet_start(SSH2_MSG_USERAUTH_BANNER);
261: packet_put_cstring(banner);
262: packet_put_cstring(""); /* language, unused */
263: packet_send();
264: debug("userauth_banner: sent");
265: done:
266: if (banner)
267: xfree(banner);
268: close(fd);
269: return;
270: }
1.18 markus 271:
1.36 stevesk 272: void
1.18 markus 273: userauth_reply(Authctxt *authctxt, int authenticated)
274: {
1.24 markus 275: char *methods;
1.28 markus 276:
1.3 markus 277: /* XXX todo: check if multiple auth methods are needed */
1.39 markus 278: if (authenticated == 1) {
1.1 markus 279: /* turn off userauth */
280: dispatch_set(SSH2_MSG_USERAUTH_REQUEST, &protocol_error);
281: packet_start(SSH2_MSG_USERAUTH_SUCCESS);
282: packet_send();
283: packet_write_wait();
284: /* now we can break out */
1.18 markus 285: authctxt->success = 1;
1.28 markus 286: } else {
287: if (authctxt->failures++ > AUTH_FAIL_MAX)
1.36 stevesk 288: packet_disconnect(AUTH_FAIL_MSG, authctxt->user);
1.24 markus 289: methods = authmethods_get();
1.1 markus 290: packet_start(SSH2_MSG_USERAUTH_FAILURE);
1.18 markus 291: packet_put_cstring(methods);
292: packet_put_char(0); /* XXX partial success, unused */
1.1 markus 293: packet_send();
294: packet_write_wait();
1.18 markus 295: xfree(methods);
1.1 markus 296: }
297: }
298:
299: int
1.18 markus 300: userauth_none(Authctxt *authctxt)
1.1 markus 301: {
1.18 markus 302: /* disable method "none", only allowed one time */
303: Authmethod *m = authmethod_lookup("none");
304: if (m != NULL)
305: m->enabled = NULL;
1.1 markus 306: packet_done();
1.25 markus 307: userauth_banner();
1.18 markus 308: return authctxt->valid ? auth_password(authctxt->pw, "") : 0;
1.1 markus 309: }
1.18 markus 310:
1.1 markus 311: int
1.18 markus 312: userauth_passwd(Authctxt *authctxt)
1.1 markus 313: {
314: char *password;
315: int authenticated = 0;
316: int change;
1.23 markus 317: u_int len;
1.1 markus 318: change = packet_get_char();
319: if (change)
320: log("password change not supported");
321: password = packet_get_string(&len);
322: packet_done();
1.18 markus 323: if (authctxt->valid &&
324: auth_password(authctxt->pw, password) == 1)
1.1 markus 325: authenticated = 1;
326: memset(password, 0, len);
327: xfree(password);
328: return authenticated;
329: }
1.18 markus 330:
331: int
332: userauth_kbdint(Authctxt *authctxt)
333: {
334: int authenticated = 0;
335: char *lang = NULL;
336: char *devs = NULL;
337:
338: lang = packet_get_string(NULL);
339: devs = packet_get_string(NULL);
340: packet_done();
341:
342: debug("keyboard-interactive language %s devs %s", lang, devs);
1.28 markus 343:
1.34 markus 344: if (options.challenge_reponse_authentication)
345: authenticated = auth2_challenge(authctxt, devs);
1.28 markus 346:
1.18 markus 347: xfree(lang);
348: xfree(devs);
349: return authenticated;
350: }
351:
1.1 markus 352: int
1.18 markus 353: userauth_pubkey(Authctxt *authctxt)
1.1 markus 354: {
355: Buffer b;
356: Key *key;
357: char *pkalg, *pkblob, *sig;
1.23 markus 358: u_int alen, blen, slen;
1.21 markus 359: int have_sig, pktype;
1.1 markus 360: int authenticated = 0;
361:
1.18 markus 362: if (!authctxt->valid) {
363: debug2("userauth_pubkey: disabled because of invalid user");
1.8 markus 364: return 0;
365: }
1.1 markus 366: have_sig = packet_get_char();
1.22 markus 367: if (datafellows & SSH_BUG_PKAUTH) {
368: debug2("userauth_pubkey: SSH_BUG_PKAUTH");
369: /* no explicit pkalg given */
370: pkblob = packet_get_string(&blen);
371: buffer_init(&b);
372: buffer_append(&b, pkblob, blen);
373: /* so we have to extract the pkalg from the pkblob */
374: pkalg = buffer_get_string(&b, &alen);
375: buffer_free(&b);
376: } else {
377: pkalg = packet_get_string(&alen);
378: pkblob = packet_get_string(&blen);
379: }
1.21 markus 380: pktype = key_type_from_name(pkalg);
381: if (pktype == KEY_UNSPEC) {
1.22 markus 382: /* this is perfectly legal */
383: log("userauth_pubkey: unsupported public key algorithm: %s", pkalg);
1.1 markus 384: xfree(pkalg);
1.22 markus 385: xfree(pkblob);
1.1 markus 386: return 0;
387: }
1.21 markus 388: key = key_from_blob(pkblob, blen);
1.2 markus 389: if (key != NULL) {
390: if (have_sig) {
391: sig = packet_get_string(&slen);
392: packet_done();
393: buffer_init(&b);
1.20 markus 394: if (datafellows & SSH_OLD_SESSIONID) {
395: buffer_append(&b, session_id2, session_id2_len);
396: } else {
1.11 markus 397: buffer_put_string(&b, session_id2, session_id2_len);
398: }
1.9 markus 399: /* reconstruct packet */
1.2 markus 400: buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST);
1.18 markus 401: buffer_put_cstring(&b, authctxt->user);
1.9 markus 402: buffer_put_cstring(&b,
1.22 markus 403: datafellows & SSH_BUG_PKSERVICE ?
1.9 markus 404: "ssh-userauth" :
1.18 markus 405: authctxt->service);
1.22 markus 406: if (datafellows & SSH_BUG_PKAUTH) {
407: buffer_put_char(&b, have_sig);
408: } else {
409: buffer_put_cstring(&b, "publickey");
410: buffer_put_char(&b, have_sig);
411: buffer_put_cstring(&b, key_ssh_name(key));
412: }
1.9 markus 413: buffer_put_string(&b, pkblob, blen);
1.21 markus 414: #ifdef DEBUG_PK
1.2 markus 415: buffer_dump(&b);
1.1 markus 416: #endif
1.2 markus 417: /* test for correct signature */
1.21 markus 418: if (user_key_allowed(authctxt->pw, key) &&
419: key_verify(key, sig, slen, buffer_ptr(&b), buffer_len(&b)) == 1)
1.2 markus 420: authenticated = 1;
421: buffer_clear(&b);
422: xfree(sig);
423: } else {
1.18 markus 424: debug("test whether pkalg/pkblob are acceptable");
1.2 markus 425: packet_done();
1.18 markus 426:
1.2 markus 427: /* XXX fake reply and always send PK_OK ? */
1.6 markus 428: /*
429: * XXX this allows testing whether a user is allowed
430: * to login: if you happen to have a valid pubkey this
431: * message is sent. the message is NEVER sent at all
432: * if a user is not allowed to login. is this an
433: * issue? -markus
434: */
1.21 markus 435: if (user_key_allowed(authctxt->pw, key)) {
1.2 markus 436: packet_start(SSH2_MSG_USERAUTH_PK_OK);
437: packet_put_string(pkalg, alen);
438: packet_put_string(pkblob, blen);
439: packet_send();
440: packet_write_wait();
1.38 markus 441: authctxt->postponed = 1;
1.2 markus 442: }
1.1 markus 443: }
1.17 markus 444: if (authenticated != 1)
445: auth_clear_options();
1.2 markus 446: key_free(key);
1.1 markus 447: }
1.21 markus 448: debug2("userauth_pubkey: authenticated %d pkalg %s", authenticated, pkalg);
1.1 markus 449: xfree(pkalg);
450: xfree(pkblob);
451: return authenticated;
452: }
453:
1.18 markus 454: /* get current user */
1.1 markus 455:
456: struct passwd*
457: auth_get_user(void)
458: {
1.18 markus 459: return (x_authctxt != NULL && x_authctxt->valid) ? x_authctxt->pw : NULL;
1.1 markus 460: }
461:
1.18 markus 462: #define DELIM ","
463:
464: char *
465: authmethods_get(void)
1.1 markus 466: {
1.18 markus 467: Authmethod *method = NULL;
1.23 markus 468: u_int size = 0;
1.18 markus 469: char *list;
1.1 markus 470:
1.18 markus 471: for (method = authmethods; method->name != NULL; method++) {
472: if (strcmp(method->name, "none") == 0)
473: continue;
474: if (method->enabled != NULL && *(method->enabled) != 0) {
475: if (size != 0)
476: size += strlen(DELIM);
477: size += strlen(method->name);
1.1 markus 478: }
1.18 markus 479: }
480: size++; /* trailing '\0' */
481: list = xmalloc(size);
482: list[0] = '\0';
483:
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 (list[0] != '\0')
489: strlcat(list, DELIM, size);
490: strlcat(list, method->name, size);
1.1 markus 491: }
492: }
1.18 markus 493: return list;
494: }
495:
496: Authmethod *
497: authmethod_lookup(const char *name)
498: {
499: Authmethod *method = NULL;
500: if (name != NULL)
501: for (method = authmethods; method->name != NULL; method++)
502: if (method->enabled != NULL &&
503: *(method->enabled) != 0 &&
504: strcmp(name, method->name) == 0)
505: return method;
506: debug2("Unrecognized authentication method name: %s", name ? name : "NULL");
507: return NULL;
1.1 markus 508: }
509:
510: /* return 1 if user allows given key */
511: int
1.21 markus 512: user_key_allowed(struct passwd *pw, Key *key)
1.1 markus 513: {
1.31 markus 514: char line[8192], file[MAXPATHLEN];
1.1 markus 515: int found_key = 0;
516: FILE *f;
1.23 markus 517: u_long linenum = 0;
1.1 markus 518: struct stat st;
519: Key *found;
520:
1.18 markus 521: if (pw == NULL)
522: return 0;
523:
1.1 markus 524: /* Temporarily use the user's uid. */
525: temporarily_use_uid(pw->pw_uid);
526:
527: /* The authorized keys. */
528: snprintf(file, sizeof file, "%.500s/%.100s", pw->pw_dir,
1.29 markus 529: _PATH_SSH_USER_PERMITTED_KEYS2);
1.1 markus 530:
531: /* Fail quietly if file does not exist */
532: if (stat(file, &st) < 0) {
533: /* Restore the privileged uid. */
534: restore_uid();
535: return 0;
536: }
537: /* Open the file containing the authorized keys. */
538: f = fopen(file, "r");
539: if (!f) {
540: /* Restore the privileged uid. */
541: restore_uid();
542: return 0;
543: }
544: if (options.strict_modes) {
545: int fail = 0;
546: char buf[1024];
547: /* Check open file in order to avoid open/stat races */
548: if (fstat(fileno(f), &st) < 0 ||
549: (st.st_uid != 0 && st.st_uid != pw->pw_uid) ||
550: (st.st_mode & 022) != 0) {
1.16 markus 551: snprintf(buf, sizeof buf,
552: "%s authentication refused for %.100s: "
553: "bad ownership or modes for '%s'.",
554: key_type(key), pw->pw_name, file);
1.1 markus 555: fail = 1;
556: } else {
1.29 markus 557: /* Check path to _PATH_SSH_USER_PERMITTED_KEYS */
1.1 markus 558: int i;
559: static const char *check[] = {
1.29 markus 560: "", _PATH_SSH_USER_DIR, NULL
1.1 markus 561: };
562: for (i = 0; check[i]; i++) {
563: snprintf(line, sizeof line, "%.500s/%.100s",
564: pw->pw_dir, check[i]);
565: if (stat(line, &st) < 0 ||
566: (st.st_uid != 0 && st.st_uid != pw->pw_uid) ||
567: (st.st_mode & 022) != 0) {
568: snprintf(buf, sizeof buf,
1.16 markus 569: "%s authentication refused for %.100s: "
1.1 markus 570: "bad ownership or modes for '%s'.",
1.16 markus 571: key_type(key), pw->pw_name, line);
1.1 markus 572: fail = 1;
573: break;
574: }
575: }
576: }
577: if (fail) {
578: fclose(f);
1.12 todd 579: log("%s",buf);
1.1 markus 580: restore_uid();
581: return 0;
582: }
583: }
584: found_key = 0;
1.16 markus 585: found = key_new(key->type);
1.1 markus 586:
587: while (fgets(line, sizeof(line), f)) {
1.10 markus 588: char *cp, *options = NULL;
1.1 markus 589: linenum++;
590: /* Skip leading whitespace, empty and comment lines. */
591: for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
592: ;
593: if (!*cp || *cp == '\n' || *cp == '#')
594: continue;
1.10 markus 595:
1.21 markus 596: if (key_read(found, &cp) == -1) {
1.10 markus 597: /* no key? check if there are options for this key */
598: int quoted = 0;
1.21 markus 599: debug2("user_key_allowed: check options: '%s'", cp);
1.10 markus 600: options = cp;
601: for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) {
602: if (*cp == '\\' && cp[1] == '"')
603: cp++; /* Skip both */
604: else if (*cp == '"')
605: quoted = !quoted;
606: }
607: /* Skip remaining whitespace. */
608: for (; *cp == ' ' || *cp == '\t'; cp++)
609: ;
1.21 markus 610: if (key_read(found, &cp) == -1) {
611: debug2("user_key_allowed: advance: '%s'", cp);
1.10 markus 612: /* still no key? advance to next line*/
613: continue;
614: }
615: }
616: if (key_equal(found, key) &&
1.30 markus 617: auth_parse_options(pw, options, file, linenum) == 1) {
1.1 markus 618: found_key = 1;
619: debug("matching key found: file %s, line %ld",
620: file, linenum);
621: break;
622: }
623: }
624: restore_uid();
625: fclose(f);
626: key_free(found);
627: return found_key;
628: }
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