Annotation of src/usr.bin/ssh/auth2.c, Revision 1.27
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"
1.27 ! markus 26: RCSID("$OpenBSD: auth2.c,v 1.26 2001/01/13 18:21:48 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:
1.26 markus 119: #ifdef AFS
120: /* If machine has AFS, set process authentication group. */
121: if (k_hasafs()) {
122: k_setpag();
123: k_unlog();
124: }
1.5 djm 125: #endif
1.1 markus 126: dispatch_init(&protocol_error);
127: dispatch_set(SSH2_MSG_SERVICE_REQUEST, &input_service_request);
1.18 markus 128: dispatch_run(DISPATCH_BLOCK, &authctxt->success, authctxt);
1.1 markus 129: do_authenticated2();
130: }
131:
132: void
1.15 markus 133: protocol_error(int type, int plen, void *ctxt)
1.1 markus 134: {
135: log("auth: protocol error: type %d plen %d", type, plen);
136: packet_start(SSH2_MSG_UNIMPLEMENTED);
137: packet_put_int(0);
138: packet_send();
139: packet_write_wait();
140: }
141:
142: void
1.15 markus 143: input_service_request(int type, int plen, void *ctxt)
1.1 markus 144: {
1.18 markus 145: Authctxt *authctxt = ctxt;
1.23 markus 146: u_int len;
1.1 markus 147: int accept = 0;
148: char *service = packet_get_string(&len);
149: packet_done();
150:
1.18 markus 151: if (authctxt == NULL)
152: fatal("input_service_request: no authctxt");
153:
1.1 markus 154: if (strcmp(service, "ssh-userauth") == 0) {
1.18 markus 155: if (!authctxt->success) {
1.1 markus 156: accept = 1;
157: /* now we can handle user-auth requests */
158: dispatch_set(SSH2_MSG_USERAUTH_REQUEST, &input_userauth_request);
159: }
160: }
161: /* XXX all other service requests are denied */
162:
163: if (accept) {
164: packet_start(SSH2_MSG_SERVICE_ACCEPT);
165: packet_put_cstring(service);
166: packet_send();
167: packet_write_wait();
168: } else {
169: debug("bad service request %s", service);
170: packet_disconnect("bad service request %s", service);
171: }
172: xfree(service);
173: }
174:
175: void
1.15 markus 176: input_userauth_request(int type, int plen, void *ctxt)
1.1 markus 177: {
1.18 markus 178: Authctxt *authctxt = ctxt;
179: Authmethod *m = NULL;
180: char *user, *service, *method;
1.1 markus 181: int authenticated = 0;
182:
1.18 markus 183: if (authctxt == NULL)
184: fatal("input_userauth_request: no authctxt");
1.1 markus 185:
1.18 markus 186: user = packet_get_string(NULL);
187: service = packet_get_string(NULL);
188: method = packet_get_string(NULL);
1.1 markus 189: debug("userauth-request for user %s service %s method %s", user, service, method);
1.24 markus 190: debug("attempt %d failures %d", authctxt->attempt, authctxt->failures);
1.1 markus 191:
1.24 markus 192: if (authctxt->attempt++ == 0) {
1.18 markus 193: /* setup auth context */
194: struct passwd *pw = NULL;
195: setproctitle("%s", user);
196: pw = getpwnam(user);
197: if (pw && allowed_user(pw) && strcmp(service, "ssh-connection")==0) {
198: authctxt->pw = pwcopy(pw);
199: authctxt->valid = 1;
200: debug2("input_userauth_request: setting up authctxt for %s", user);
201: } else {
202: log("input_userauth_request: illegal user %s", user);
203: }
204: authctxt->user = xstrdup(user);
205: authctxt->service = xstrdup(service);
206: } else if (authctxt->valid) {
207: if (strcmp(user, authctxt->user) != 0 ||
208: strcmp(service, authctxt->service) != 0) {
209: log("input_userauth_request: missmatch: (%s,%s)!=(%s,%s)",
210: user, service, authctxt->user, authctxt->service);
211: authctxt->valid = 0;
1.1 markus 212: }
213: }
1.18 markus 214:
215: m = authmethod_lookup(method);
216: if (m != NULL) {
217: debug2("input_userauth_request: try method %s", method);
218: authenticated = m->userauth(authctxt);
219: } else {
220: debug2("input_userauth_request: unsupported method %s", method);
221: }
222: if (!authctxt->valid && authenticated == 1) {
223: log("input_userauth_request: INTERNAL ERROR: authenticated invalid user %s service %s", user, method);
224: authenticated = 0;
225: }
226:
227: /* Special handling for root */
228: if (authenticated == 1 &&
229: authctxt->valid && authctxt->pw->pw_uid == 0 && !options.permit_root_login) {
1.3 markus 230: authenticated = 0;
1.18 markus 231: log("ROOT LOGIN REFUSED FROM %.200s", get_canonical_hostname());
1.3 markus 232: }
233:
1.18 markus 234: /* Log before sending the reply */
235: userauth_log(authctxt, authenticated, method);
236: userauth_reply(authctxt, authenticated);
237:
238: xfree(service);
239: xfree(user);
240: xfree(method);
241: }
242:
1.25 markus 243: void
244: userauth_banner(void)
245: {
246: struct stat st;
247: char *banner = NULL;
248: off_t len, n;
249: int fd;
250:
251: if (options.banner == NULL || (datafellows & SSH_BUG_BANNER))
252: return;
253: if ((fd = open(options.banner, O_RDONLY)) < 0) {
254: error("userauth_banner: open %s failed: %s",
255: options.banner, strerror(errno));
256: return;
257: }
258: if (fstat(fd, &st) < 0)
259: goto done;
260: len = st.st_size;
261: banner = xmalloc(len + 1);
262: if ((n = read(fd, banner, len)) < 0)
263: goto done;
264: banner[n] = '\0';
265: packet_start(SSH2_MSG_USERAUTH_BANNER);
266: packet_put_cstring(banner);
267: packet_put_cstring(""); /* language, unused */
268: packet_send();
269: debug("userauth_banner: sent");
270: done:
271: if (banner)
272: xfree(banner);
273: close(fd);
274: return;
275: }
1.18 markus 276:
277: void
278: userauth_log(Authctxt *authctxt, int authenticated, char *method)
279: {
280: void (*authlog) (const char *fmt,...) = verbose;
281: char *user = NULL, *authmsg = NULL;
282:
1.6 markus 283: /* Raise logging level */
284: if (authenticated == 1 ||
1.18 markus 285: !authctxt->valid ||
1.24 markus 286: authctxt->failures >= AUTH_FAIL_LOG ||
1.6 markus 287: strcmp(method, "password") == 0)
288: authlog = log;
289:
290: if (authenticated == 1) {
291: authmsg = "Accepted";
292: } else if (authenticated == 0) {
293: authmsg = "Failed";
294: } else {
295: authmsg = "Postponed";
296: }
1.18 markus 297:
298: if (authctxt->valid) {
299: user = authctxt->pw->pw_uid == 0 ? "ROOT" : authctxt->user;
300: } else {
1.27 ! markus 301: user = authctxt->user ? authctxt->user : "NOUSER";
1.18 markus 302: }
303:
1.6 markus 304: authlog("%s %s for %.200s from %.200s port %d ssh2",
1.18 markus 305: authmsg,
306: method,
307: user,
308: get_remote_ipaddr(),
309: get_remote_port());
310: }
1.6 markus 311:
1.18 markus 312: void
313: userauth_reply(Authctxt *authctxt, int authenticated)
314: {
1.24 markus 315: char *methods;
1.3 markus 316: /* XXX todo: check if multiple auth methods are needed */
1.1 markus 317: if (authenticated == 1) {
318: /* turn off userauth */
319: dispatch_set(SSH2_MSG_USERAUTH_REQUEST, &protocol_error);
320: packet_start(SSH2_MSG_USERAUTH_SUCCESS);
321: packet_send();
322: packet_write_wait();
323: /* now we can break out */
1.18 markus 324: authctxt->success = 1;
1.1 markus 325: } else if (authenticated == 0) {
1.24 markus 326: if (authctxt->failures++ >= AUTH_FAIL_MAX)
327: packet_disconnect("too many failed userauth_requests");
328: methods = authmethods_get();
1.1 markus 329: packet_start(SSH2_MSG_USERAUTH_FAILURE);
1.18 markus 330: packet_put_cstring(methods);
331: packet_put_char(0); /* XXX partial success, unused */
1.1 markus 332: packet_send();
333: packet_write_wait();
1.18 markus 334: xfree(methods);
335: } else {
336: /* do nothing, we did already send a reply */
1.1 markus 337: }
338: }
339:
340: int
1.18 markus 341: userauth_none(Authctxt *authctxt)
1.1 markus 342: {
1.18 markus 343: /* disable method "none", only allowed one time */
344: Authmethod *m = authmethod_lookup("none");
345: if (m != NULL)
346: m->enabled = NULL;
1.1 markus 347: packet_done();
1.25 markus 348: userauth_banner();
1.18 markus 349: return authctxt->valid ? auth_password(authctxt->pw, "") : 0;
1.1 markus 350: }
1.18 markus 351:
1.1 markus 352: int
1.18 markus 353: userauth_passwd(Authctxt *authctxt)
1.1 markus 354: {
355: char *password;
356: int authenticated = 0;
357: int change;
1.23 markus 358: u_int len;
1.1 markus 359: change = packet_get_char();
360: if (change)
361: log("password change not supported");
362: password = packet_get_string(&len);
363: packet_done();
1.18 markus 364: if (authctxt->valid &&
365: auth_password(authctxt->pw, password) == 1)
1.1 markus 366: authenticated = 1;
367: memset(password, 0, len);
368: xfree(password);
369: return authenticated;
370: }
1.18 markus 371:
372: int
373: userauth_kbdint(Authctxt *authctxt)
374: {
375: int authenticated = 0;
376: char *lang = NULL;
377: char *devs = NULL;
378:
379: lang = packet_get_string(NULL);
380: devs = packet_get_string(NULL);
381: packet_done();
382:
383: debug("keyboard-interactive language %s devs %s", lang, devs);
384: #ifdef SKEY
385: /* XXX hardcoded, we should look at devs */
386: if (options.skey_authentication != 0)
387: authenticated = auth2_skey(authctxt);
388: #endif
389: xfree(lang);
390: xfree(devs);
391: return authenticated;
392: }
393:
1.1 markus 394: int
1.18 markus 395: userauth_pubkey(Authctxt *authctxt)
1.1 markus 396: {
397: Buffer b;
398: Key *key;
399: char *pkalg, *pkblob, *sig;
1.23 markus 400: u_int alen, blen, slen;
1.21 markus 401: int have_sig, pktype;
1.1 markus 402: int authenticated = 0;
403:
1.18 markus 404: if (!authctxt->valid) {
405: debug2("userauth_pubkey: disabled because of invalid user");
1.8 markus 406: return 0;
407: }
1.1 markus 408: have_sig = packet_get_char();
1.22 markus 409: if (datafellows & SSH_BUG_PKAUTH) {
410: debug2("userauth_pubkey: SSH_BUG_PKAUTH");
411: /* no explicit pkalg given */
412: pkblob = packet_get_string(&blen);
413: buffer_init(&b);
414: buffer_append(&b, pkblob, blen);
415: /* so we have to extract the pkalg from the pkblob */
416: pkalg = buffer_get_string(&b, &alen);
417: buffer_free(&b);
418: } else {
419: pkalg = packet_get_string(&alen);
420: pkblob = packet_get_string(&blen);
421: }
1.21 markus 422: pktype = key_type_from_name(pkalg);
423: if (pktype == KEY_UNSPEC) {
1.22 markus 424: /* this is perfectly legal */
425: log("userauth_pubkey: unsupported public key algorithm: %s", pkalg);
1.1 markus 426: xfree(pkalg);
1.22 markus 427: xfree(pkblob);
1.1 markus 428: return 0;
429: }
1.21 markus 430: key = key_from_blob(pkblob, blen);
1.2 markus 431: if (key != NULL) {
432: if (have_sig) {
433: sig = packet_get_string(&slen);
434: packet_done();
435: buffer_init(&b);
1.20 markus 436: if (datafellows & SSH_OLD_SESSIONID) {
437: buffer_append(&b, session_id2, session_id2_len);
438: } else {
1.11 markus 439: buffer_put_string(&b, session_id2, session_id2_len);
440: }
1.9 markus 441: /* reconstruct packet */
1.2 markus 442: buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST);
1.18 markus 443: buffer_put_cstring(&b, authctxt->user);
1.9 markus 444: buffer_put_cstring(&b,
1.22 markus 445: datafellows & SSH_BUG_PKSERVICE ?
1.9 markus 446: "ssh-userauth" :
1.18 markus 447: authctxt->service);
1.22 markus 448: if (datafellows & SSH_BUG_PKAUTH) {
449: buffer_put_char(&b, have_sig);
450: } else {
451: buffer_put_cstring(&b, "publickey");
452: buffer_put_char(&b, have_sig);
453: buffer_put_cstring(&b, key_ssh_name(key));
454: }
1.9 markus 455: buffer_put_string(&b, pkblob, blen);
1.21 markus 456: #ifdef DEBUG_PK
1.2 markus 457: buffer_dump(&b);
1.1 markus 458: #endif
1.2 markus 459: /* test for correct signature */
1.21 markus 460: if (user_key_allowed(authctxt->pw, key) &&
461: key_verify(key, sig, slen, buffer_ptr(&b), buffer_len(&b)) == 1)
1.2 markus 462: authenticated = 1;
463: buffer_clear(&b);
464: xfree(sig);
465: } else {
1.18 markus 466: debug("test whether pkalg/pkblob are acceptable");
1.2 markus 467: packet_done();
1.18 markus 468:
1.2 markus 469: /* XXX fake reply and always send PK_OK ? */
1.6 markus 470: /*
471: * XXX this allows testing whether a user is allowed
472: * to login: if you happen to have a valid pubkey this
473: * message is sent. the message is NEVER sent at all
474: * if a user is not allowed to login. is this an
475: * issue? -markus
476: */
1.21 markus 477: if (user_key_allowed(authctxt->pw, key)) {
1.2 markus 478: packet_start(SSH2_MSG_USERAUTH_PK_OK);
479: packet_put_string(pkalg, alen);
480: packet_put_string(pkblob, blen);
481: packet_send();
482: packet_write_wait();
483: authenticated = -1;
484: }
1.1 markus 485: }
1.17 markus 486: if (authenticated != 1)
487: auth_clear_options();
1.2 markus 488: key_free(key);
1.1 markus 489: }
1.21 markus 490: debug2("userauth_pubkey: authenticated %d pkalg %s", authenticated, pkalg);
1.1 markus 491: xfree(pkalg);
492: xfree(pkblob);
493: return authenticated;
494: }
495:
1.18 markus 496: /* get current user */
1.1 markus 497:
498: struct passwd*
499: auth_get_user(void)
500: {
1.18 markus 501: return (x_authctxt != NULL && x_authctxt->valid) ? x_authctxt->pw : NULL;
1.1 markus 502: }
503:
1.18 markus 504: #define DELIM ","
505:
506: char *
507: authmethods_get(void)
1.1 markus 508: {
1.18 markus 509: Authmethod *method = NULL;
1.23 markus 510: u_int size = 0;
1.18 markus 511: char *list;
1.1 markus 512:
1.18 markus 513: for (method = authmethods; method->name != NULL; method++) {
514: if (strcmp(method->name, "none") == 0)
515: continue;
516: if (method->enabled != NULL && *(method->enabled) != 0) {
517: if (size != 0)
518: size += strlen(DELIM);
519: size += strlen(method->name);
1.1 markus 520: }
1.18 markus 521: }
522: size++; /* trailing '\0' */
523: list = xmalloc(size);
524: list[0] = '\0';
525:
526: for (method = authmethods; method->name != NULL; method++) {
527: if (strcmp(method->name, "none") == 0)
528: continue;
529: if (method->enabled != NULL && *(method->enabled) != 0) {
530: if (list[0] != '\0')
531: strlcat(list, DELIM, size);
532: strlcat(list, method->name, size);
1.1 markus 533: }
534: }
1.18 markus 535: return list;
536: }
537:
538: Authmethod *
539: authmethod_lookup(const char *name)
540: {
541: Authmethod *method = NULL;
542: if (name != NULL)
543: for (method = authmethods; method->name != NULL; method++)
544: if (method->enabled != NULL &&
545: *(method->enabled) != 0 &&
546: strcmp(name, method->name) == 0)
547: return method;
548: debug2("Unrecognized authentication method name: %s", name ? name : "NULL");
549: return NULL;
1.1 markus 550: }
551:
552: /* return 1 if user allows given key */
553: int
1.21 markus 554: user_key_allowed(struct passwd *pw, Key *key)
1.1 markus 555: {
556: char line[8192], file[1024];
557: int found_key = 0;
558: FILE *f;
1.23 markus 559: u_long linenum = 0;
1.1 markus 560: struct stat st;
561: Key *found;
562:
1.18 markus 563: if (pw == NULL)
564: return 0;
565:
1.1 markus 566: /* Temporarily use the user's uid. */
567: temporarily_use_uid(pw->pw_uid);
568:
569: /* The authorized keys. */
570: snprintf(file, sizeof file, "%.500s/%.100s", pw->pw_dir,
571: SSH_USER_PERMITTED_KEYS2);
572:
573: /* Fail quietly if file does not exist */
574: if (stat(file, &st) < 0) {
575: /* Restore the privileged uid. */
576: restore_uid();
577: return 0;
578: }
579: /* Open the file containing the authorized keys. */
580: f = fopen(file, "r");
581: if (!f) {
582: /* Restore the privileged uid. */
583: restore_uid();
584: return 0;
585: }
586: if (options.strict_modes) {
587: int fail = 0;
588: char buf[1024];
589: /* Check open file in order to avoid open/stat races */
590: if (fstat(fileno(f), &st) < 0 ||
591: (st.st_uid != 0 && st.st_uid != pw->pw_uid) ||
592: (st.st_mode & 022) != 0) {
1.16 markus 593: snprintf(buf, sizeof buf,
594: "%s authentication refused for %.100s: "
595: "bad ownership or modes for '%s'.",
596: key_type(key), pw->pw_name, file);
1.1 markus 597: fail = 1;
598: } else {
599: /* Check path to SSH_USER_PERMITTED_KEYS */
600: int i;
601: static const char *check[] = {
602: "", SSH_USER_DIR, NULL
603: };
604: for (i = 0; check[i]; i++) {
605: snprintf(line, sizeof line, "%.500s/%.100s",
606: pw->pw_dir, check[i]);
607: if (stat(line, &st) < 0 ||
608: (st.st_uid != 0 && st.st_uid != pw->pw_uid) ||
609: (st.st_mode & 022) != 0) {
610: snprintf(buf, sizeof buf,
1.16 markus 611: "%s authentication refused for %.100s: "
1.1 markus 612: "bad ownership or modes for '%s'.",
1.16 markus 613: key_type(key), pw->pw_name, line);
1.1 markus 614: fail = 1;
615: break;
616: }
617: }
618: }
619: if (fail) {
620: fclose(f);
1.12 todd 621: log("%s",buf);
1.1 markus 622: restore_uid();
623: return 0;
624: }
625: }
626: found_key = 0;
1.16 markus 627: found = key_new(key->type);
1.1 markus 628:
629: while (fgets(line, sizeof(line), f)) {
1.10 markus 630: char *cp, *options = NULL;
1.1 markus 631: linenum++;
632: /* Skip leading whitespace, empty and comment lines. */
633: for (cp = line; *cp == ' ' || *cp == '\t'; cp++)
634: ;
635: if (!*cp || *cp == '\n' || *cp == '#')
636: continue;
1.10 markus 637:
1.21 markus 638: if (key_read(found, &cp) == -1) {
1.10 markus 639: /* no key? check if there are options for this key */
640: int quoted = 0;
1.21 markus 641: debug2("user_key_allowed: check options: '%s'", cp);
1.10 markus 642: options = cp;
643: for (; *cp && (quoted || (*cp != ' ' && *cp != '\t')); cp++) {
644: if (*cp == '\\' && cp[1] == '"')
645: cp++; /* Skip both */
646: else if (*cp == '"')
647: quoted = !quoted;
648: }
649: /* Skip remaining whitespace. */
650: for (; *cp == ' ' || *cp == '\t'; cp++)
651: ;
1.21 markus 652: if (key_read(found, &cp) == -1) {
653: debug2("user_key_allowed: advance: '%s'", cp);
1.10 markus 654: /* still no key? advance to next line*/
655: continue;
656: }
657: }
658: if (key_equal(found, key) &&
659: auth_parse_options(pw, options, linenum) == 1) {
1.1 markus 660: found_key = 1;
661: debug("matching key found: file %s, line %ld",
662: file, linenum);
663: break;
664: }
665: }
666: restore_uid();
667: fclose(f);
668: key_free(found);
669: return found_key;
1.18 markus 670: }
671:
672: struct passwd *
673: pwcopy(struct passwd *pw)
674: {
675: struct passwd *copy = xmalloc(sizeof(*copy));
676: memset(copy, 0, sizeof(*copy));
677: copy->pw_name = xstrdup(pw->pw_name);
678: copy->pw_passwd = xstrdup(pw->pw_passwd);
679: copy->pw_uid = pw->pw_uid;
680: copy->pw_gid = pw->pw_gid;
681: copy->pw_class = xstrdup(pw->pw_class);
682: copy->pw_dir = xstrdup(pw->pw_dir);
683: copy->pw_shell = xstrdup(pw->pw_shell);
684: return copy;
1.1 markus 685: }
![[BACK]](/icons/back.gif){kind=icon}
Return to auth2.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / ssh