Annotation of src/usr.bin/ssh/monitor_wrap.c, Revision 1.90
1.90 ! djm 1: /* $OpenBSD: monitor_wrap.c,v 1.89 2016/08/13 17:47:41 markus Exp $ */
1.1 provos 2: /*
3: * Copyright 2002 Niels Provos <provos@citi.umich.edu>
4: * Copyright 2002 Markus Friedl <markus@openbsd.org>
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: *
16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26: */
27:
1.46 stevesk 28: #include <sys/types.h>
1.51 dtucker 29: #include <sys/uio.h>
1.61 djm 30: #include <sys/queue.h>
1.46 stevesk 31:
1.47 stevesk 32: #include <errno.h>
1.46 stevesk 33: #include <pwd.h>
1.50 deraadt 34: #include <signal.h>
1.49 stevesk 35: #include <stdio.h>
1.48 stevesk 36: #include <string.h>
1.51 dtucker 37: #include <unistd.h>
1.68 dtucker 38:
1.80 markus 39: #ifdef WITH_OPENSSL
1.68 dtucker 40: #include <openssl/bn.h>
41: #include <openssl/dh.h>
1.80 markus 42: #endif
1.1 provos 43:
1.50 deraadt 44: #include "xmalloc.h"
1.1 provos 45: #include "ssh.h"
1.80 markus 46: #ifdef WITH_OPENSSL
1.1 provos 47: #include "dh.h"
1.80 markus 48: #endif
1.50 deraadt 49: #include "buffer.h"
50: #include "key.h"
51: #include "cipher.h"
1.1 provos 52: #include "kex.h"
1.50 deraadt 53: #include "hostfile.h"
1.1 provos 54: #include "auth.h"
1.22 markus 55: #include "auth-options.h"
1.1 provos 56: #include "packet.h"
57: #include "mac.h"
58: #include "log.h"
1.54 miod 59: #include <zlib.h>
1.1 provos 60: #include "monitor.h"
1.50 deraadt 61: #ifdef GSSAPI
62: #include "ssh-gss.h"
63: #endif
1.1 provos 64: #include "monitor_wrap.h"
65: #include "atomicio.h"
66: #include "monitor_fdpass.h"
1.45 djm 67: #include "misc.h"
1.70 djm 68: #include "uuencode.h"
1.1 provos 69:
70: #include "channels.h"
71: #include "session.h"
1.55 dtucker 72: #include "servconf.h"
1.29 markus 73:
1.82 markus 74: #include "ssherr.h"
75:
1.1 provos 76: /* Imports */
77: extern z_stream incoming_stream;
78: extern z_stream outgoing_stream;
1.7 mouring 79: extern struct monitor *pmonitor;
1.39 dtucker 80: extern Buffer loginmsg;
1.55 dtucker 81: extern ServerOptions options;
1.73 djm 82:
83: void
84: mm_log_handler(LogLevel level, const char *msg, void *ctx)
85: {
86: Buffer log_msg;
87: struct monitor *mon = (struct monitor *)ctx;
88:
89: if (mon->m_log_sendfd == -1)
90: fatal("%s: no log channel", __func__);
91:
92: buffer_init(&log_msg);
93: /*
94: * Placeholder for packet length. Will be filled in with the actual
95: * packet length once the packet has been constucted. This saves
96: * fragile math.
97: */
98: buffer_put_int(&log_msg, 0);
99:
100: buffer_put_int(&log_msg, level);
101: buffer_put_cstring(&log_msg, msg);
102: put_u32(buffer_ptr(&log_msg), buffer_len(&log_msg) - 4);
103: if (atomicio(vwrite, mon->m_log_sendfd, buffer_ptr(&log_msg),
104: buffer_len(&log_msg)) != buffer_len(&log_msg))
105: fatal("%s: write: %s", __func__, strerror(errno));
106: buffer_free(&log_msg);
107: }
1.1 provos 108:
1.32 markus 109: int
110: mm_is_monitor(void)
111: {
112: /*
113: * m_pid is only set in the privileged part, and
114: * points to the unprivileged child.
115: */
1.34 markus 116: return (pmonitor && pmonitor->m_pid > 0);
1.32 markus 117: }
118:
1.1 provos 119: void
1.36 avsm 120: mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
1.1 provos 121: {
1.13 deraadt 122: u_int mlen = buffer_len(m);
1.1 provos 123: u_char buf[5];
124:
1.8 markus 125: debug3("%s entering: type %d", __func__, type);
1.1 provos 126:
1.45 djm 127: put_u32(buf, mlen + 1);
1.10 deraadt 128: buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
1.36 avsm 129: if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
1.40 avsm 130: fatal("%s: write: %s", __func__, strerror(errno));
1.36 avsm 131: if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
1.40 avsm 132: fatal("%s: write: %s", __func__, strerror(errno));
1.1 provos 133: }
134:
135: void
1.36 avsm 136: mm_request_receive(int sock, Buffer *m)
1.1 provos 137: {
138: u_char buf[4];
1.13 deraadt 139: u_int msg_len;
1.1 provos 140:
1.8 markus 141: debug3("%s entering", __func__);
1.1 provos 142:
1.40 avsm 143: if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
144: if (errno == EPIPE)
1.32 markus 145: cleanup_exit(255);
1.40 avsm 146: fatal("%s: read: %s", __func__, strerror(errno));
1.1 provos 147: }
1.45 djm 148: msg_len = get_u32(buf);
1.1 provos 149: if (msg_len > 256 * 1024)
1.8 markus 150: fatal("%s: read: bad msg_len %d", __func__, msg_len);
1.1 provos 151: buffer_clear(m);
152: buffer_append_space(m, msg_len);
1.40 avsm 153: if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
154: fatal("%s: read: %s", __func__, strerror(errno));
1.1 provos 155: }
156:
157: void
1.36 avsm 158: mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
1.1 provos 159: {
160: u_char rtype;
161:
1.8 markus 162: debug3("%s entering: type %d", __func__, type);
1.1 provos 163:
1.36 avsm 164: mm_request_receive(sock, m);
1.1 provos 165: rtype = buffer_get_char(m);
166: if (rtype != type)
1.8 markus 167: fatal("%s: read: rtype %d != type %d", __func__,
1.1 provos 168: rtype, type);
169: }
170:
1.80 markus 171: #ifdef WITH_OPENSSL
1.1 provos 172: DH *
173: mm_choose_dh(int min, int nbits, int max)
174: {
175: BIGNUM *p, *g;
176: int success = 0;
177: Buffer m;
178:
179: buffer_init(&m);
180: buffer_put_int(&m, min);
181: buffer_put_int(&m, nbits);
182: buffer_put_int(&m, max);
183:
1.7 mouring 184: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
1.1 provos 185:
1.8 markus 186: debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
1.7 mouring 187: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
1.1 provos 188:
189: success = buffer_get_char(&m);
190: if (success == 0)
1.8 markus 191: fatal("%s: MONITOR_ANS_MODULI failed", __func__);
1.1 provos 192:
193: if ((p = BN_new()) == NULL)
1.8 markus 194: fatal("%s: BN_new failed", __func__);
1.3 markus 195: if ((g = BN_new()) == NULL)
1.8 markus 196: fatal("%s: BN_new failed", __func__);
1.1 provos 197: buffer_get_bignum2(&m, p);
198: buffer_get_bignum2(&m, g);
199:
1.8 markus 200: debug3("%s: remaining %d", __func__, buffer_len(&m));
1.1 provos 201: buffer_free(&m);
202:
203: return (dh_new_group(g, p));
204: }
1.80 markus 205: #endif
1.1 provos 206:
207: int
1.84 djm 208: mm_key_sign(Key *key, u_char **sigp, u_int *lenp,
1.86 markus 209: const u_char *data, u_int datalen, const char *hostkey_alg)
1.1 provos 210: {
1.83 markus 211: struct kex *kex = *pmonitor->m_pkex;
1.1 provos 212: Buffer m;
213:
1.8 markus 214: debug3("%s entering", __func__);
1.1 provos 215:
216: buffer_init(&m);
1.84 djm 217: buffer_put_int(&m, kex->host_key_index(key, 0, active_state));
1.1 provos 218: buffer_put_string(&m, data, datalen);
1.86 markus 219: buffer_put_cstring(&m, hostkey_alg);
1.1 provos 220:
1.7 mouring 221: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
1.1 provos 222:
1.8 markus 223: debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
1.7 mouring 224: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
1.1 provos 225: *sigp = buffer_get_string(&m, lenp);
226: buffer_free(&m);
227:
228: return (0);
229: }
230:
231: struct passwd *
1.37 dtucker 232: mm_getpwnamallow(const char *username)
1.1 provos 233: {
234: Buffer m;
235: struct passwd *pw;
1.72 djm 236: u_int len, i;
1.55 dtucker 237: ServerOptions *newopts;
1.1 provos 238:
1.8 markus 239: debug3("%s entering", __func__);
1.1 provos 240:
241: buffer_init(&m);
1.37 dtucker 242: buffer_put_cstring(&m, username);
1.1 provos 243:
1.7 mouring 244: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
1.1 provos 245:
1.8 markus 246: debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
1.7 mouring 247: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
1.1 provos 248:
249: if (buffer_get_char(&m) == 0) {
1.60 dtucker 250: pw = NULL;
251: goto out;
1.1 provos 252: }
1.55 dtucker 253: pw = buffer_get_string(&m, &len);
254: if (len != sizeof(struct passwd))
1.8 markus 255: fatal("%s: struct passwd size mismatch", __func__);
1.1 provos 256: pw->pw_name = buffer_get_string(&m, NULL);
257: pw->pw_passwd = buffer_get_string(&m, NULL);
258: pw->pw_gecos = buffer_get_string(&m, NULL);
259: pw->pw_class = buffer_get_string(&m, NULL);
260: pw->pw_dir = buffer_get_string(&m, NULL);
261: pw->pw_shell = buffer_get_string(&m, NULL);
1.55 dtucker 262:
1.60 dtucker 263: out:
1.55 dtucker 264: /* copy options block as a Match directive may have changed some */
265: newopts = buffer_get_string(&m, &len);
266: if (len != sizeof(*newopts))
267: fatal("%s: option block size mismatch", __func__);
1.71 djm 268:
269: #define M_CP_STROPT(x) do { \
270: if (newopts->x != NULL) \
271: newopts->x = buffer_get_string(&m, NULL); \
272: } while (0)
1.72 djm 273: #define M_CP_STRARRAYOPT(x, nx) do { \
274: for (i = 0; i < newopts->nx; i++) \
275: newopts->x[i] = buffer_get_string(&m, NULL); \
276: } while (0)
1.71 djm 277: /* See comment in servconf.h */
278: COPY_MATCH_STRING_OPTS();
279: #undef M_CP_STROPT
1.72 djm 280: #undef M_CP_STRARRAYOPT
1.71 djm 281:
1.55 dtucker 282: copy_set_server_options(&options, newopts, 1);
1.90 ! djm 283: log_change_level(options.log_level);
1.76 djm 284: free(newopts);
1.55 dtucker 285:
1.1 provos 286: buffer_free(&m);
287:
288: return (pw);
1.6 djm 289: }
290:
1.33 markus 291: char *
292: mm_auth2_read_banner(void)
1.6 djm 293: {
294: Buffer m;
295: char *banner;
296:
1.8 markus 297: debug3("%s entering", __func__);
1.6 djm 298:
299: buffer_init(&m);
1.7 mouring 300: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
1.6 djm 301: buffer_clear(&m);
302:
1.33 markus 303: mm_request_receive_expect(pmonitor->m_recvfd,
304: MONITOR_ANS_AUTH2_READ_BANNER, &m);
1.6 djm 305: banner = buffer_get_string(&m, NULL);
306: buffer_free(&m);
1.10 deraadt 307:
1.33 markus 308: /* treat empty banner as missing banner */
309: if (strlen(banner) == 0) {
1.76 djm 310: free(banner);
1.33 markus 311: banner = NULL;
312: }
1.6 djm 313: return (banner);
1.1 provos 314: }
315:
316: /* Inform the privileged process about service and style */
317:
318: void
319: mm_inform_authserv(char *service, char *style)
320: {
321: Buffer m;
322:
1.8 markus 323: debug3("%s entering", __func__);
1.1 provos 324:
325: buffer_init(&m);
326: buffer_put_cstring(&m, service);
327: buffer_put_cstring(&m, style ? style : "");
328:
1.7 mouring 329: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
1.1 provos 330:
331: buffer_free(&m);
332: }
333:
334: /* Do the password authentication */
335: int
336: mm_auth_password(Authctxt *authctxt, char *password)
337: {
338: Buffer m;
339: int authenticated = 0;
340:
1.8 markus 341: debug3("%s entering", __func__);
1.1 provos 342:
343: buffer_init(&m);
344: buffer_put_cstring(&m, password);
1.7 mouring 345: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
1.1 provos 346:
1.8 markus 347: debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
1.7 mouring 348: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
1.1 provos 349:
350: authenticated = buffer_get_int(&m);
351:
352: buffer_free(&m);
353:
1.3 markus 354: debug3("%s: user %sauthenticated",
1.8 markus 355: __func__, authenticated ? "" : "not ");
1.1 provos 356: return (authenticated);
357: }
358:
359: int
1.85 djm 360: mm_user_key_allowed(struct passwd *pw, Key *key, int pubkey_auth_attempt)
1.1 provos 361: {
1.85 djm 362: return (mm_key_allowed(MM_USERKEY, NULL, NULL, key,
363: pubkey_auth_attempt));
1.1 provos 364: }
365:
366: int
1.88 djm 367: mm_hostbased_key_allowed(struct passwd *pw, const char *user, const char *host,
1.1 provos 368: Key *key)
369: {
1.85 djm 370: return (mm_key_allowed(MM_HOSTKEY, user, host, key, 0));
1.1 provos 371: }
372:
373: int
1.88 djm 374: mm_key_allowed(enum mm_keytype type, const char *user, const char *host,
375: Key *key, int pubkey_auth_attempt)
1.1 provos 376: {
377: Buffer m;
378: u_char *blob;
379: u_int len;
1.22 markus 380: int allowed = 0, have_forced = 0;
1.1 provos 381:
1.8 markus 382: debug3("%s entering", __func__);
1.1 provos 383:
384: /* Convert the key to a blob and the pass it over */
385: if (!key_to_blob(key, &blob, &len))
386: return (0);
387:
388: buffer_init(&m);
389: buffer_put_int(&m, type);
390: buffer_put_cstring(&m, user ? user : "");
391: buffer_put_cstring(&m, host ? host : "");
392: buffer_put_string(&m, blob, len);
1.85 djm 393: buffer_put_int(&m, pubkey_auth_attempt);
1.76 djm 394: free(blob);
1.1 provos 395:
1.7 mouring 396: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
1.1 provos 397:
1.8 markus 398: debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
1.7 mouring 399: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
1.1 provos 400:
401: allowed = buffer_get_int(&m);
402:
1.22 markus 403: /* fake forced command */
404: auth_clear_options();
405: have_forced = buffer_get_int(&m);
406: forced_command = have_forced ? xstrdup("true") : NULL;
407:
1.1 provos 408: buffer_free(&m);
409:
410: return (allowed);
411: }
412:
1.3 markus 413: /*
1.1 provos 414: * This key verify needs to send the key type along, because the
415: * privileged parent makes the decision if the key is allowed
416: * for authentication.
417: */
418:
419: int
420: mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
421: {
422: Buffer m;
423: u_char *blob;
424: u_int len;
425: int verified = 0;
426:
1.8 markus 427: debug3("%s entering", __func__);
1.1 provos 428:
429: /* Convert the key to a blob and the pass it over */
430: if (!key_to_blob(key, &blob, &len))
431: return (0);
432:
433: buffer_init(&m);
434: buffer_put_string(&m, blob, len);
435: buffer_put_string(&m, sig, siglen);
436: buffer_put_string(&m, data, datalen);
1.76 djm 437: free(blob);
1.1 provos 438:
1.7 mouring 439: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
1.1 provos 440:
1.8 markus 441: debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
1.7 mouring 442: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
1.1 provos 443:
444: verified = buffer_get_int(&m);
445:
446: buffer_free(&m);
447:
448: return (verified);
449: }
450:
451: void
1.36 avsm 452: mm_send_keystate(struct monitor *monitor)
1.1 provos 453: {
1.82 markus 454: struct ssh *ssh = active_state; /* XXX */
455: struct sshbuf *m;
456: int r;
457:
458: if ((m = sshbuf_new()) == NULL)
459: fatal("%s: sshbuf_new failed", __func__);
460: if ((r = ssh_packet_get_state(ssh, m)) != 0)
461: fatal("%s: get_state failed: %s",
462: __func__, ssh_err(r));
463: mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, m);
1.8 markus 464: debug3("%s: Finished sending state", __func__);
1.82 markus 465: sshbuf_free(m);
1.1 provos 466: }
467:
468: int
1.42 deraadt 469: mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
1.1 provos 470: {
471: Buffer m;
1.39 dtucker 472: char *p, *msg;
1.62 djm 473: int success = 0, tmp1 = -1, tmp2 = -1;
474:
475: /* Kludge: ensure there are fds free to receive the pty/tty */
476: if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
477: (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
478: error("%s: cannot allocate fds for pty", __func__);
479: if (tmp1 > 0)
480: close(tmp1);
481: if (tmp2 > 0)
482: close(tmp2);
483: return 0;
484: }
485: close(tmp1);
486: close(tmp2);
1.1 provos 487:
488: buffer_init(&m);
1.7 mouring 489: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
1.1 provos 490:
1.8 markus 491: debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
1.7 mouring 492: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
1.1 provos 493:
494: success = buffer_get_int(&m);
495: if (success == 0) {
1.8 markus 496: debug3("%s: pty alloc failed", __func__);
1.1 provos 497: buffer_free(&m);
498: return (0);
499: }
500: p = buffer_get_string(&m, NULL);
1.39 dtucker 501: msg = buffer_get_string(&m, NULL);
1.1 provos 502: buffer_free(&m);
503:
504: strlcpy(namebuf, p, namebuflen); /* Possible truncation */
1.76 djm 505: free(p);
1.39 dtucker 506:
507: buffer_append(&loginmsg, msg, strlen(msg));
1.76 djm 508: free(msg);
1.1 provos 509:
1.58 djm 510: if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
511: (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
512: fatal("%s: receive fds failed", __func__);
1.1 provos 513:
514: /* Success */
515: return (1);
516: }
517:
518: void
1.32 markus 519: mm_session_pty_cleanup2(Session *s)
1.1 provos 520: {
521: Buffer m;
522:
523: if (s->ttyfd == -1)
524: return;
525: buffer_init(&m);
526: buffer_put_cstring(&m, s->tty);
1.7 mouring 527: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
1.1 provos 528: buffer_free(&m);
1.3 markus 529:
1.1 provos 530: /* closed dup'ed master */
1.62 djm 531: if (s->ptymaster != -1 && close(s->ptymaster) < 0)
532: error("close(s->ptymaster/%d): %s",
533: s->ptymaster, strerror(errno));
1.1 provos 534:
535: /* unlink pty from session */
536: s->ttyfd = -1;
537: }
538:
539: /* Request process termination */
540:
541: void
542: mm_terminate(void)
543: {
544: Buffer m;
545:
546: buffer_init(&m);
1.7 mouring 547: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
1.1 provos 548: buffer_free(&m);
549: }
550:
1.2 markus 551: static void
1.1 provos 552: mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
553: char ***prompts, u_int **echo_on)
554: {
1.10 deraadt 555: *name = xstrdup("");
556: *infotxt = xstrdup("");
1.1 provos 557: *numprompts = 1;
1.43 djm 558: *prompts = xcalloc(*numprompts, sizeof(char *));
559: *echo_on = xcalloc(*numprompts, sizeof(u_int));
1.1 provos 560: (*echo_on)[0] = 0;
561: }
562:
563: int
564: mm_bsdauth_query(void *ctx, char **name, char **infotxt,
565: u_int *numprompts, char ***prompts, u_int **echo_on)
566: {
567: Buffer m;
1.21 markus 568: u_int success;
1.1 provos 569: char *challenge;
570:
1.8 markus 571: debug3("%s: entering", __func__);
1.1 provos 572:
573: buffer_init(&m);
1.7 mouring 574: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
1.1 provos 575:
1.7 mouring 576: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
1.1 provos 577: &m);
1.21 markus 578: success = buffer_get_int(&m);
579: if (success == 0) {
1.8 markus 580: debug3("%s: no challenge", __func__);
1.1 provos 581: buffer_free(&m);
582: return (-1);
583: }
584:
585: /* Get the challenge, and format the response */
586: challenge = buffer_get_string(&m, NULL);
587: buffer_free(&m);
588:
589: mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
590: (*prompts)[0] = challenge;
591:
1.8 markus 592: debug3("%s: received challenge: %s", __func__, challenge);
1.1 provos 593:
594: return (0);
595: }
596:
597: int
598: mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
599: {
600: Buffer m;
601: int authok;
602:
1.8 markus 603: debug3("%s: entering", __func__);
1.1 provos 604: if (numresponses != 1)
605: return (-1);
606:
607: buffer_init(&m);
608: buffer_put_cstring(&m, responses[0]);
1.7 mouring 609: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
1.1 provos 610:
1.7 mouring 611: mm_request_receive_expect(pmonitor->m_recvfd,
1.1 provos 612: MONITOR_ANS_BSDAUTHRESPOND, &m);
613:
614: authok = buffer_get_int(&m);
615: buffer_free(&m);
616:
617: return ((authok == 0) ? -1 : 0);
618: }
1.29 markus 619:
620: #ifdef GSSAPI
621: OM_uint32
1.36 avsm 622: mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1.29 markus 623: {
624: Buffer m;
625: OM_uint32 major;
626:
627: /* Client doesn't get to see the context */
628: *ctx = NULL;
629:
630: buffer_init(&m);
1.36 avsm 631: buffer_put_string(&m, goid->elements, goid->length);
1.29 markus 632:
633: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
634: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
635:
636: major = buffer_get_int(&m);
637:
638: buffer_free(&m);
639: return (major);
640: }
641:
642: OM_uint32
643: mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
644: gss_buffer_desc *out, OM_uint32 *flags)
645: {
646: Buffer m;
647: OM_uint32 major;
1.30 deraadt 648: u_int len;
1.29 markus 649:
650: buffer_init(&m);
651: buffer_put_string(&m, in->value, in->length);
652:
653: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
654: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
655:
656: major = buffer_get_int(&m);
1.30 deraadt 657: out->value = buffer_get_string(&m, &len);
658: out->length = len;
1.29 markus 659: if (flags)
660: *flags = buffer_get_int(&m);
661:
662: buffer_free(&m);
663:
664: return (major);
1.35 markus 665: }
666:
667: OM_uint32
668: mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
669: {
670: Buffer m;
671: OM_uint32 major;
672:
673: buffer_init(&m);
674: buffer_put_string(&m, gssbuf->value, gssbuf->length);
675: buffer_put_string(&m, gssmic->value, gssmic->length);
676:
677: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
678: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
679: &m);
680:
681: major = buffer_get_int(&m);
682: buffer_free(&m);
683: return(major);
1.29 markus 684: }
685:
686: int
687: mm_ssh_gssapi_userok(char *user)
688: {
689: Buffer m;
690: int authenticated = 0;
691:
692: buffer_init(&m);
693:
694: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
695: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
696: &m);
697:
698: authenticated = buffer_get_int(&m);
699:
700: buffer_free(&m);
701: debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
702: return (authenticated);
703: }
704: #endif /* GSSAPI */
1.64 djm 705:
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