Annotation of src/usr.bin/ssh/auth2.c, Revision 1.25
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"
1.25 ! markus 26: RCSID("$OpenBSD: auth2.c,v 1.24 2000/12/28 14:25:51 markus Exp $");
1.1 markus 27:
28: #include <openssl/dsa.h>
29: #include <openssl/rsa.h>
30: #include <openssl/evp.h>
31:
32: #include "xmalloc.h"
33: #include "rsa.h"
34: #include "ssh.h"
35: #include "pty.h"
36: #include "packet.h"
37: #include "buffer.h"
38: #include "servconf.h"
39: #include "compat.h"
40: #include "channels.h"
41: #include "bufaux.h"
42: #include "ssh2.h"
43: #include "auth.h"
44: #include "session.h"
45: #include "dispatch.h"
46: #include "auth.h"
47: #include "key.h"
48: #include "kex.h"
49:
50: #include "uidswap.h"
1.10 markus 51: #include "auth-options.h"
1.1 markus 52:
53: /* import */
54: extern ServerOptions options;
1.23 markus 55: extern u_char *session_id2;
1.1 markus 56: extern int session_id2_len;
57:
1.18 markus 58: static Authctxt *x_authctxt = NULL;
59: static int one = 1;
60:
61: typedef struct Authmethod Authmethod;
62: struct Authmethod {
63: char *name;
64: int (*userauth)(Authctxt *authctxt);
65: int *enabled;
66: };
67:
1.1 markus 68: /* protocol */
69:
1.15 markus 70: void input_service_request(int type, int plen, void *ctxt);
71: void input_userauth_request(int type, int plen, void *ctxt);
72: void protocol_error(int type, int plen, void *ctxt);
1.1 markus 73:
74:
75: /* helper */
1.18 markus 76: Authmethod *authmethod_lookup(const char *name);
77: struct passwd *pwcopy(struct passwd *pw);
1.21 markus 78: int user_key_allowed(struct passwd *pw, Key *key);
1.18 markus 79: char *authmethods_get(void);
1.1 markus 80:
1.18 markus 81: /* auth */
1.25 ! markus 82: void userauth_banner(void);
1.18 markus 83: int userauth_none(Authctxt *authctxt);
84: int userauth_passwd(Authctxt *authctxt);
85: int userauth_pubkey(Authctxt *authctxt);
86: int userauth_kbdint(Authctxt *authctxt);
87:
88: Authmethod authmethods[] = {
89: {"none",
90: userauth_none,
91: &one},
92: {"publickey",
93: userauth_pubkey,
1.21 markus 94: &options.pubkey_authentication},
1.18 markus 95: {"keyboard-interactive",
96: userauth_kbdint,
97: &options.kbd_interactive_authentication},
98: {"password",
99: userauth_passwd,
100: &options.password_authentication},
101: {NULL, NULL, NULL}
1.1 markus 102: };
103:
104: /*
1.18 markus 105: * loop until authctxt->success == TRUE
1.1 markus 106: */
107:
108: void
109: do_authentication2()
110: {
1.18 markus 111: Authctxt *authctxt = xmalloc(sizeof(*authctxt));
112: memset(authctxt, 'a', sizeof(*authctxt));
113: authctxt->valid = 0;
114: authctxt->attempt = 0;
1.24 markus 115: authctxt->failures = 0;
1.18 markus 116: authctxt->success = 0;
117: x_authctxt = authctxt; /*XXX*/
118:
1.5 djm 119: #ifdef KRB4
1.18 markus 120: /* turn off kerberos, not supported by SSH2 */
1.4 markus 121: options.kerberos_authentication = 0;
1.5 djm 122: #endif
1.1 markus 123: dispatch_init(&protocol_error);
124: dispatch_set(SSH2_MSG_SERVICE_REQUEST, &input_service_request);
1.18 markus 125: dispatch_run(DISPATCH_BLOCK, &authctxt->success, authctxt);
1.1 markus 126: do_authenticated2();
127: }
128:
129: void
1.15 markus 130: protocol_error(int type, int plen, void *ctxt)
1.1 markus 131: {
132: log("auth: protocol error: type %d plen %d", type, plen);
133: packet_start(SSH2_MSG_UNIMPLEMENTED);
134: packet_put_int(0);
135: packet_send();
136: packet_write_wait();
137: }
138:
139: void
1.15 markus 140: input_service_request(int type, int plen, void *ctxt)
1.1 markus 141: {
1.18 markus 142: Authctxt *authctxt = ctxt;
1.23 markus 143: u_int len;
1.1 markus 144: int accept = 0;
145: char *service = packet_get_string(&len);
146: packet_done();
147:
1.18 markus 148: if (authctxt == NULL)
149: fatal("input_service_request: no authctxt");
150:
1.1 markus 151: if (strcmp(service, "ssh-userauth") == 0) {
1.18 markus 152: if (!authctxt->success) {
1.1 markus 153: accept = 1;
154: /* now we can handle user-auth requests */
155: dispatch_set(SSH2_MSG_USERAUTH_REQUEST, &input_userauth_request);
156: }
157: }
158: /* XXX all other service requests are denied */
159:
160: if (accept) {
161: packet_start(SSH2_MSG_SERVICE_ACCEPT);
162: packet_put_cstring(service);
163: packet_send();
164: packet_write_wait();
165: } else {
166: debug("bad service request %s", service);
167: packet_disconnect("bad service request %s", service);
168: }
169: xfree(service);
170: }
171:
172: void
1.15 markus 173: input_userauth_request(int type, int plen, void *ctxt)
1.1 markus 174: {
1.18 markus 175: Authctxt *authctxt = ctxt;
176: Authmethod *m = NULL;
177: char *user, *service, *method;
1.1 markus 178: int authenticated = 0;
179:
1.18 markus 180: if (authctxt == NULL)
181: fatal("input_userauth_request: no authctxt");
1.1 markus 182:
1.18 markus 183: user = packet_get_string(NULL);
184: service = packet_get_string(NULL);
185: method = packet_get_string(NULL);
1.1 markus 186: debug("userauth-request for user %s service %s method %s", user, service, method);
1.24 markus 187: debug("attempt %d failures %d", authctxt->attempt, authctxt->failures);
1.1 markus 188:
1.24 markus 189: if (authctxt->attempt++ == 0) {
1.18 markus 190: /* setup auth context */
191: struct passwd *pw = NULL;
192: setproctitle("%s", user);
193: pw = getpwnam(user);
194: if (pw && allowed_user(pw) && strcmp(service, "ssh-connection")==0) {
195: authctxt->pw = pwcopy(pw);
196: authctxt->valid = 1;
197: debug2("input_userauth_request: setting up authctxt for %s", user);
198: } else {
199: log("input_userauth_request: illegal user %s", user);
200: }
201: authctxt->user = xstrdup(user);
202: authctxt->service = xstrdup(service);
203: } else if (authctxt->valid) {
204: if (strcmp(user, authctxt->user) != 0 ||
205: strcmp(service, authctxt->service) != 0) {
206: log("input_userauth_request: missmatch: (%s,%s)!=(%s,%s)",
207: user, service, authctxt->user, authctxt->service);
208: authctxt->valid = 0;
1.1 markus 209: }
210: }
1.18 markus 211:
212: m = authmethod_lookup(method);
213: if (m != NULL) {
214: debug2("input_userauth_request: try method %s", method);
215: authenticated = m->userauth(authctxt);
216: } else {
217: debug2("input_userauth_request: unsupported method %s", method);
218: }
219: if (!authctxt->valid && authenticated == 1) {
220: log("input_userauth_request: INTERNAL ERROR: authenticated invalid user %s service %s", user, method);
221: authenticated = 0;
222: }
223:
224: /* Special handling for root */
225: if (authenticated == 1 &&
226: authctxt->valid && authctxt->pw->pw_uid == 0 && !options.permit_root_login) {
1.3 markus 227: authenticated = 0;
1.18 markus 228: log("ROOT LOGIN REFUSED FROM %.200s", get_canonical_hostname());
1.3 markus 229: }
230:
1.18 markus 231: /* Log before sending the reply */
232: userauth_log(authctxt, authenticated, method);
233: userauth_reply(authctxt, authenticated);
234:
235: xfree(service);
236: xfree(user);
237: xfree(method);
238: }
239:
1.25 ! markus 240: void
! 241: userauth_banner(void)
! 242: {
! 243: struct stat st;
! 244: char *banner = NULL;
! 245: off_t len, n;
! 246: int fd;
! 247:
! 248: if (options.banner == NULL || (datafellows & SSH_BUG_BANNER))
! 249: return;
! 250: if ((fd = open(options.banner, O_RDONLY)) < 0) {
! 251: error("userauth_banner: open %s failed: %s",
! 252: options.banner, strerror(errno));
! 253: return;
! 254: }
! 255: if (fstat(fd, &st) < 0)
! 256: goto done;
! 257: len = st.st_size;
! 258: banner = xmalloc(len + 1);
! 259: if ((n = read(fd, banner, len)) < 0)
! 260: goto done;
! 261: banner[n] = '\0';
! 262: packet_start(SSH2_MSG_USERAUTH_BANNER);
! 263: packet_put_cstring(banner);
! 264: packet_put_cstring(""); /* language, unused */
! 265: packet_send();
! 266: debug("userauth_banner: sent");
! 267: done:
! 268: if (banner)
! 269: xfree(banner);
! 270: close(fd);
! 271: return;
! 272: }
1.18 markus 273:
274: void
275: userauth_log(Authctxt *authctxt, int authenticated, char *method)
276: {
277: void (*authlog) (const char *fmt,...) = verbose;
278: char *user = NULL, *authmsg = NULL;
279:
1.6 markus 280: /* Raise logging level */
281: if (authenticated == 1 ||
1.18 markus 282: !authctxt->valid ||
1.24 markus 283: authctxt->failures >= AUTH_FAIL_LOG ||
1.6 markus 284: strcmp(method, "password") == 0)
285: authlog = log;
286:
287: if (authenticated == 1) {
288: authmsg = "Accepted";
289: } else if (authenticated == 0) {
290: authmsg = "Failed";
291: } else {
292: authmsg = "Postponed";
293: }
1.18 markus 294:
295: if (authctxt->valid) {
296: user = authctxt->pw->pw_uid == 0 ? "ROOT" : authctxt->user;
297: } else {
298: user = "NOUSER";
299: }
300:
1.6 markus 301: authlog("%s %s for %.200s from %.200s port %d ssh2",
1.18 markus 302: authmsg,
303: method,
304: user,
305: get_remote_ipaddr(),
306: get_remote_port());
307: }
1.6 markus 308:
1.18 markus 309: void
310: userauth_reply(Authctxt *authctxt, int authenticated)
311: {
1.24 markus 312: char *methods;
1.3 markus 313: /* XXX todo: check if multiple auth methods are needed */
1.1 markus 314: if (authenticated == 1) {
315: /* turn off userauth */
316: dispatch_set(SSH2_MSG_USERAUTH_REQUEST, &protocol_error);
317: packet_start(SSH2_MSG_USERAUTH_SUCCESS);
318: packet_send();
319: packet_write_wait();
320: /* now we can break out */
1.18 markus 321: authctxt->success = 1;
1.1 markus 322: } else if (authenticated == 0) {
1.24 markus 323: if (authctxt->failures++ >= AUTH_FAIL_MAX)
324: packet_disconnect("too many failed userauth_requests");
325: methods = authmethods_get();
1.1 markus 326: packet_start(SSH2_MSG_USERAUTH_FAILURE);
1.18 markus 327: packet_put_cstring(methods);
328: packet_put_char(0); /* XXX partial success, unused */
1.1 markus 329: packet_send();
330: packet_write_wait();
1.18 markus 331: xfree(methods);
332: } else {
333: /* do nothing, we did already send a reply */
1.1 markus 334: }
335: }
336:
337: int
1.18 markus 338: userauth_none(Authctxt *authctxt)
1.1 markus 339: {
1.18 markus 340: /* disable method "none", only allowed one time */
341: Authmethod *m = authmethod_lookup("none");
342: if (m != NULL)
343: m->enabled = NULL;
1.1 markus 344: packet_done();
1.25 ! markus 345: userauth_banner();
1.18 markus 346: return authctxt->valid ? auth_password(authctxt->pw, "") : 0;
1.1 markus 347: }
1.18 markus 348:
1.1 markus 349: int
1.18 markus 350: userauth_passwd(Authctxt *authctxt)
1.1 markus 351: {
352: char *password;
353: int authenticated = 0;
354: int change;
1.23 markus 355: u_int len;
1.1 markus 356: change = packet_get_char();
357: if (change)
358: log("password change not supported");
359: password = packet_get_string(&len);
360: packet_done();
1.18 markus 361: if (authctxt->valid &&
362: auth_password(authctxt->pw, password) == 1)
1.1 markus 363: authenticated = 1;
364: memset(password, 0, len);
365: xfree(password);
366: return authenticated;
367: }
1.18 markus 368:
369: int
370: userauth_kbdint(Authctxt *authctxt)
371: {
372: int authenticated = 0;
373: char *lang = NULL;
374: char *devs = NULL;
375:
376: lang = packet_get_string(NULL);
377: devs = packet_get_string(NULL);
378: packet_done();
379:
380: debug("keyboard-interactive language %s devs %s", lang, devs);
381: #ifdef SKEY
382: /* XXX hardcoded, we should look at devs */
383: if (options.skey_authentication != 0)
384: authenticated = auth2_skey(authctxt);
385: #endif
386: xfree(lang);
387: xfree(devs);
388: return authenticated;
389: }
390:
1.1 markus 391: int
1.18 markus 392: userauth_pubkey(Authctxt *authctxt)
1.1 markus 393: {
394: Buffer b;
395: Key *key;
396: char *pkalg, *pkblob, *sig;
1.23 markus 397: u_int alen, blen, slen;
1.21 markus 398: int have_sig, pktype;
1.1 markus 399: int authenticated = 0;
400:
1.18 markus 401: if (!authctxt->valid) {
402: debug2("userauth_pubkey: disabled because of invalid user");
1.8 markus 403: return 0;
404: }
1.1 markus 405: have_sig = packet_get_char();
1.22 markus 406: if (datafellows & SSH_BUG_PKAUTH) {
407: debug2("userauth_pubkey: SSH_BUG_PKAUTH");
408: /* no explicit pkalg given */
409: pkblob = packet_get_string(&blen);
410: buffer_init(&b);
411: buffer_append(&b, pkblob, blen);
412: /* so we have to extract the pkalg from the pkblob */
413: pkalg = buffer_get_string(&b, &alen);
414: buffer_free(&b);
415: } else {
416: pkalg = packet_get_string(&alen);
417: pkblob = packet_get_string(&blen);
418: }
1.21 markus 419: pktype = key_type_from_name(pkalg);
420: if (pktype == KEY_UNSPEC) {
1.22 markus 421: /* this is perfectly legal */
422: log("userauth_pubkey: unsupported public key algorithm: %s", pkalg);
1.1 markus 423: xfree(pkalg);
1.22 markus 424: xfree(pkblob);
1.1 markus 425: return 0;
426: }
1.21 markus 427: key = key_from_blob(pkblob, blen);
1.2 markus 428: if (key != NULL) {
429: if (have_sig) {
430: sig = packet_get_string(&slen);
431: packet_done();
432: buffer_init(&b);
1.20 markus 433: if (datafellows & SSH_OLD_SESSIONID) {
434: buffer_append(&b, session_id2, session_id2_len);
435: } else {
1.11 markus 436: buffer_put_string(&b, session_id2, session_id2_len);
437: }
1.9 markus 438: /* reconstruct packet */
1.2 markus 439: buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST);
1.18 markus 440: buffer_put_cstring(&b, authctxt->user);
1.9 markus 441: buffer_put_cstring(&b,
1.22 markus 442: datafellows & SSH_BUG_PKSERVICE ?
1.9 markus 443: "ssh-userauth" :
1.18 markus 444: authctxt->service);
1.22 markus 445: if (datafellows & SSH_BUG_PKAUTH) {
446: buffer_put_char(&b, have_sig);
447: } else {
448: buffer_put_cstring(&b, "publickey");
449: buffer_put_char(&b, have_sig);
450: buffer_put_cstring(&b, key_ssh_name(key));
451: }
1.9 markus 452: buffer_put_string(&b, pkblob, blen);
1.21 markus 453: #ifdef DEBUG_PK
1.2 markus 454: buffer_dump(&b);
1.1 markus 455: #endif
1.2 markus 456: /* test for correct signature */
1.21 markus 457: if (user_key_allowed(authctxt->pw, key) &&
458: key_verify(key, sig, slen, buffer_ptr(&b), buffer_len(&b)) == 1)
1.2 markus 459: authenticated = 1;
460: buffer_clear(&b);
461: xfree(sig);
462: } else {
1.18 markus 463: debug("test whether pkalg/pkblob are acceptable");
1.2 markus 464: packet_done();
1.18 markus 465:
1.2 markus 466: /* XXX fake reply and always send PK_OK ? */
1.6 markus 467: /*
468: * XXX this allows testing whether a user is allowed
469: * to login: if you happen to have a valid pubkey this
470: * message is sent. the message is NEVER sent at all
471: * if a user is not allowed to login. is this an
472: * issue? -markus
473: */
1.21 markus 474: if (user_key_allowed(authctxt->pw, key)) {
1.2 markus 475: packet_start(SSH2_MSG_USERAUTH_PK_OK);
476: packet_put_string(pkalg, alen);
477: packet_put_string(pkblob, blen);
478: packet_send();
479: packet_write_wait();
480: authenticated = -1;
481: }
1.1 markus 482: }
1.17 markus 483: if (authenticated != 1)
484: auth_clear_options();
1.2 markus 485: key_free(key);
1.1 markus 486: }
1.21 markus 487: debug2("userauth_pubkey: authenticated %d pkalg %s", authenticated, pkalg);
1.1 markus 488: xfree(pkalg);
489: xfree(pkblob);
490: return authenticated;
491: }
492:
1.18 markus 493: /* get current user */
1.1 markus 494:
495: struct passwd*
496: auth_get_user(void)
497: {
1.18 markus 498: return (x_authctxt != NULL && x_authctxt->valid) ? x_authctxt->pw : NULL;
1.1 markus 499: }
500:
1.18 markus 501: #define DELIM ","
502:
503: char *
504: authmethods_get(void)
1.1 markus 505: {
1.18 markus 506: Authmethod *method = NULL;
1.23 markus 507: u_int size = 0;
1.18 markus 508: char *list;
1.1 markus 509:
1.18 markus 510: for (method = authmethods; method->name != NULL; method++) {
511: if (strcmp(method->name, "none") == 0)
512: continue;
513: if (method->enabled != NULL && *(method->enabled) != 0) {
514: if (size != 0)
515: size += strlen(DELIM);
516: size += strlen(method->name);
1.1 markus 517: }
1.18 markus 518: }
519: size++; /* trailing '\0' */
520: list = xmalloc(size);
521: list[0] = '\0';
522:
523: for (method = authmethods; method->name != NULL; method++) {
524: if (strcmp(method->name, "none") == 0)
525: continue;
526: if (method->enabled != NULL && *(method->enabled) != 0) {
527: if (list[0] != '\0')
528: strlcat(list, DELIM, size);
529: strlcat(list, method->name, size);
1.1 markus 530: }
531: }
1.18 markus 532: return list;
533: }
534:
535: Authmethod *
536: authmethod_lookup(const char *name)
537: {
538: Authmethod *method = NULL;
539: if (name != NULL)
540: for (method = authmethods; method->name != NULL; method++)
541: if (method->enabled != NULL &&
542: *(method->enabled) != 0 &&
543: strcmp(name, method->name) == 0)
544: return method;
545: debug2("Unrecognized authentication method name: %s", name ? name : "NULL");
546: return NULL;
1.1 markus 547: }
548:
549: /* return 1 if user allows given key */
550: int
1.21 markus 551: user_key_allowed(struct passwd *pw, Key *key)
1.1 markus 552: {
553: char line[8192], file[1024];
554: int found_key = 0;
555: FILE *f;
1.23 markus 556: u_long linenum = 0;
1.1 markus 557: struct stat st;
558: Key *found;
559:
1.18 markus 560: if (pw == NULL)
561: return 0;
562:
1.1 markus 563: /* Temporarily use the user's uid. */
564: temporarily_use_uid(pw->pw_uid);
565:
566: /* The authorized keys. */
567: snprintf(file, sizeof file, "%.500s/%.100s", pw->pw_dir,
568: SSH_USER_PERMITTED_KEYS2);
569:
570: /* Fail quietly if file does not exist */
571: if (stat(file, &st) < 0) {
572: /* Restore the privileged uid. */
573: restore_uid();
574: return 0;
575: }
576: /* Open the file containing the authorized keys. */
577: f = fopen(file, "r");
578: if (!f) {
579: /* Restore the privileged uid. */
580: restore_uid();
581: return 0;
582: }
583: if (options.strict_modes) {
584: int fail = 0;
585: char buf[1024];
586: /* Check open file in order to avoid open/stat races */
587: if (fstat(fileno(f), &st) < 0 ||
588: (st.st_uid != 0 && st.st_uid != pw->pw_uid) ||
589: (st.st_mode & 022) != 0) {
1.16 markus 590: snprintf(buf, sizeof buf,
591: "%s authentication refused for %.100s: "
592: "bad ownership or modes for '%s'.",
593: key_type(key), pw->pw_name, file);
1.1 markus 594: fail = 1;
595: } else {
596: /* Check path to SSH_USER_PERMITTED_KEYS */
597: int i;
598: static const char *check[] = {
599: "", SSH_USER_DIR, NULL
600: };
601: for (i = 0; check[i]; i++) {
602: snprintf(line, sizeof line, "%.500s/%.100s",
603: pw->pw_dir, check[i]);
604: if (stat(line, &st) < 0 ||
605: (st.st_uid != 0 && st.st_uid != pw->pw_uid) ||
606: (st.st_mode & 022) != 0) {
607: snprintf(buf, sizeof buf,
1.16 markus 608: "%s authentication refused for %.100s: "
1.1 markus 609: "bad ownership or modes for '%s'.",
1.16 markus 610: key_type(key), pw->pw_name, line);
1.1 markus 611: fail = 1;
612: break;
613: }
614: }
615: }
616: if (fail) {
617: fclose(f);
1.12 todd 618: log("%s",buf);
1.1 markus 619: restore_uid();
620: return 0;
621: }
622: }
623: found_key = 0;
1.16 markus 624: found = key_new(key->type);
1.1 markus 625:
626: while (fgets(line, sizeof(line), f)) {
1.10 markus 627: char *cp, *options = NULL;
1.1 markus 628: linenum++;
629: /* Skip leading whitespace, empty and comment lines. */
630: for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
631: ;
632: if (!*cp || *cp == '\n' || *cp == '#')
633: continue;
1.10 markus 634:
1.21 markus 635: if (key_read(found, &cp) == -1) {
1.10 markus 636: /* no key? check if there are options for this key */
637: int quoted = 0;
1.21 markus 638: debug2("user_key_allowed: check options: '%s'", cp);
1.10 markus 639: options = cp;
640: for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) {
641: if (*cp == '\\' && cp[1] == '"')
642: cp++; /* Skip both */
643: else if (*cp == '"')
644: quoted = !quoted;
645: }
646: /* Skip remaining whitespace. */
647: for (; *cp == ' ' || *cp == '\t'; cp++)
648: ;
1.21 markus 649: if (key_read(found, &cp) == -1) {
650: debug2("user_key_allowed: advance: '%s'", cp);
1.10 markus 651: /* still no key? advance to next line*/
652: continue;
653: }
654: }
655: if (key_equal(found, key) &&
656: auth_parse_options(pw, options, linenum) == 1) {
1.1 markus 657: found_key = 1;
658: debug("matching key found: file %s, line %ld",
659: file, linenum);
660: break;
661: }
662: }
663: restore_uid();
664: fclose(f);
665: key_free(found);
666: return found_key;
1.18 markus 667: }
668:
669: struct passwd *
670: pwcopy(struct passwd *pw)
671: {
672: struct passwd *copy = xmalloc(sizeof(*copy));
673: memset(copy, 0, sizeof(*copy));
674: copy->pw_name = xstrdup(pw->pw_name);
675: copy->pw_passwd = xstrdup(pw->pw_passwd);
676: copy->pw_uid = pw->pw_uid;
677: copy->pw_gid = pw->pw_gid;
678: copy->pw_class = xstrdup(pw->pw_class);
679: copy->pw_dir = xstrdup(pw->pw_dir);
680: copy->pw_shell = xstrdup(pw->pw_shell);
681: return copy;
1.1 markus 682: }
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