1/*
2 * Copyright 2002 Niels Provos <provos@citi.umich.edu>
3 * Copyright 2002 Markus Friedl <markus@openbsd.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "includes.h"
| 1/*
2 * Copyright 2002 Niels Provos <provos@citi.umich.edu>
3 * Copyright 2002 Markus Friedl <markus@openbsd.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "includes.h"
|
28RCSID("$OpenBSD: monitor_wrap.c,v 1.11 2002/06/19 18:01:00 markus Exp $");
29RCSID("$FreeBSD: head/crypto/openssh/monitor_wrap.c 99052 2002-06-29 10:56:23Z des $");
| 28RCSID("$OpenBSD: monitor_wrap.c,v 1.19 2002/09/26 11:38:43 markus Exp $");
29RCSID("$FreeBSD: head/crypto/openssh/monitor_wrap.c 106130 2002-10-29 10:16:02Z des $");
|
30
31#include <openssl/bn.h>
32#include <openssl/dh.h>
33
34#include "ssh.h"
35#include "dh.h"
36#include "kex.h"
37#include "auth.h"
38#include "buffer.h"
39#include "bufaux.h"
40#include "packet.h"
41#include "mac.h"
42#include "log.h"
43#include "zlib.h"
44#include "monitor.h"
45#include "monitor_wrap.h"
46#include "xmalloc.h"
47#include "atomicio.h"
48#include "monitor_fdpass.h"
49#include "getput.h"
50
51#include "auth.h"
52#include "channels.h"
53#include "session.h"
54
55/* Imports */
56extern int compat20;
57extern Newkeys *newkeys[];
58extern z_stream incoming_stream;
59extern z_stream outgoing_stream;
60extern struct monitor *pmonitor;
61extern Buffer input, output;
62
63void
64mm_request_send(int socket, enum monitor_reqtype type, Buffer *m)
65{
| 30
31#include <openssl/bn.h>
32#include <openssl/dh.h>
33
34#include "ssh.h"
35#include "dh.h"
36#include "kex.h"
37#include "auth.h"
38#include "buffer.h"
39#include "bufaux.h"
40#include "packet.h"
41#include "mac.h"
42#include "log.h"
43#include "zlib.h"
44#include "monitor.h"
45#include "monitor_wrap.h"
46#include "xmalloc.h"
47#include "atomicio.h"
48#include "monitor_fdpass.h"
49#include "getput.h"
50
51#include "auth.h"
52#include "channels.h"
53#include "session.h"
54
55/* Imports */
56extern int compat20;
57extern Newkeys *newkeys[];
58extern z_stream incoming_stream;
59extern z_stream outgoing_stream;
60extern struct monitor *pmonitor;
61extern Buffer input, output;
62
63void
64mm_request_send(int socket, enum monitor_reqtype type, Buffer *m)
65{
|
66 u_char buf[5];
| |
67 u_int mlen = buffer_len(m);
| 66 u_int mlen = buffer_len(m);
|
| 67 u_char buf[5];
|
68
69 debug3("%s entering: type %d", __func__, type);
70
71 PUT_32BIT(buf, mlen + 1);
72 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
73 if (atomicio(write, socket, buf, sizeof(buf)) != sizeof(buf))
74 fatal("%s: write", __func__);
75 if (atomicio(write, socket, buffer_ptr(m), mlen) != mlen)
76 fatal("%s: write", __func__);
77}
78
79void
80mm_request_receive(int socket, Buffer *m)
81{
82 u_char buf[4];
| 68
69 debug3("%s entering: type %d", __func__, type);
70
71 PUT_32BIT(buf, mlen + 1);
72 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
73 if (atomicio(write, socket, buf, sizeof(buf)) != sizeof(buf))
74 fatal("%s: write", __func__);
75 if (atomicio(write, socket, buffer_ptr(m), mlen) != mlen)
76 fatal("%s: write", __func__);
77}
78
79void
80mm_request_receive(int socket, Buffer *m)
81{
82 u_char buf[4];
|
83 ssize_t res;
| |
84 u_int msg_len;
| 83 u_int msg_len;
|
| 84 ssize_t res;
|
85
86 debug3("%s entering", __func__);
87
88 res = atomicio(read, socket, buf, sizeof(buf));
89 if (res != sizeof(buf)) {
90 if (res == 0)
91 fatal_cleanup();
92 fatal("%s: read: %ld", __func__, (long)res);
93 }
94 msg_len = GET_32BIT(buf);
95 if (msg_len > 256 * 1024)
96 fatal("%s: read: bad msg_len %d", __func__, msg_len);
97 buffer_clear(m);
98 buffer_append_space(m, msg_len);
99 res = atomicio(read, socket, buffer_ptr(m), msg_len);
100 if (res != msg_len)
101 fatal("%s: read: %ld != msg_len", __func__, (long)res);
102}
103
104void
105mm_request_receive_expect(int socket, enum monitor_reqtype type, Buffer *m)
106{
107 u_char rtype;
108
109 debug3("%s entering: type %d", __func__, type);
110
111 mm_request_receive(socket, m);
112 rtype = buffer_get_char(m);
113 if (rtype != type)
114 fatal("%s: read: rtype %d != type %d", __func__,
115 rtype, type);
116}
117
118DH *
119mm_choose_dh(int min, int nbits, int max)
120{
121 BIGNUM *p, *g;
122 int success = 0;
123 Buffer m;
124
125 buffer_init(&m);
126 buffer_put_int(&m, min);
127 buffer_put_int(&m, nbits);
128 buffer_put_int(&m, max);
129
130 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
131
132 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
133 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
134
135 success = buffer_get_char(&m);
136 if (success == 0)
137 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
138
139 if ((p = BN_new()) == NULL)
140 fatal("%s: BN_new failed", __func__);
141 if ((g = BN_new()) == NULL)
142 fatal("%s: BN_new failed", __func__);
143 buffer_get_bignum2(&m, p);
144 buffer_get_bignum2(&m, g);
145
146 debug3("%s: remaining %d", __func__, buffer_len(&m));
147 buffer_free(&m);
148
149 return (dh_new_group(g, p));
150}
151
152int
153mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
154{
155 Kex *kex = *pmonitor->m_pkex;
156 Buffer m;
157
158 debug3("%s entering", __func__);
159
160 buffer_init(&m);
161 buffer_put_int(&m, kex->host_key_index(key));
162 buffer_put_string(&m, data, datalen);
163
164 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
165
166 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
167 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
168 *sigp = buffer_get_string(&m, lenp);
169 buffer_free(&m);
170
171 return (0);
172}
173
174struct passwd *
175mm_getpwnamallow(const char *login)
176{
177 Buffer m;
178 struct passwd *pw;
179 u_int pwlen;
180
181 debug3("%s entering", __func__);
182
183 buffer_init(&m);
184 buffer_put_cstring(&m, login);
185
186 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
187
188 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
189 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
190
191 if (buffer_get_char(&m) == 0) {
192 buffer_free(&m);
193 return (NULL);
194 }
195 pw = buffer_get_string(&m, &pwlen);
196 if (pwlen != sizeof(struct passwd))
197 fatal("%s: struct passwd size mismatch", __func__);
198 pw->pw_name = buffer_get_string(&m, NULL);
199 pw->pw_passwd = buffer_get_string(&m, NULL);
200 pw->pw_gecos = buffer_get_string(&m, NULL);
201#ifdef HAVE_PW_CLASS_IN_PASSWD
202 pw->pw_class = buffer_get_string(&m, NULL);
203#endif
204 pw->pw_dir = buffer_get_string(&m, NULL);
205 pw->pw_shell = buffer_get_string(&m, NULL);
206 buffer_free(&m);
207
208 return (pw);
209}
210
| 85
86 debug3("%s entering", __func__);
87
88 res = atomicio(read, socket, buf, sizeof(buf));
89 if (res != sizeof(buf)) {
90 if (res == 0)
91 fatal_cleanup();
92 fatal("%s: read: %ld", __func__, (long)res);
93 }
94 msg_len = GET_32BIT(buf);
95 if (msg_len > 256 * 1024)
96 fatal("%s: read: bad msg_len %d", __func__, msg_len);
97 buffer_clear(m);
98 buffer_append_space(m, msg_len);
99 res = atomicio(read, socket, buffer_ptr(m), msg_len);
100 if (res != msg_len)
101 fatal("%s: read: %ld != msg_len", __func__, (long)res);
102}
103
104void
105mm_request_receive_expect(int socket, enum monitor_reqtype type, Buffer *m)
106{
107 u_char rtype;
108
109 debug3("%s entering: type %d", __func__, type);
110
111 mm_request_receive(socket, m);
112 rtype = buffer_get_char(m);
113 if (rtype != type)
114 fatal("%s: read: rtype %d != type %d", __func__,
115 rtype, type);
116}
117
118DH *
119mm_choose_dh(int min, int nbits, int max)
120{
121 BIGNUM *p, *g;
122 int success = 0;
123 Buffer m;
124
125 buffer_init(&m);
126 buffer_put_int(&m, min);
127 buffer_put_int(&m, nbits);
128 buffer_put_int(&m, max);
129
130 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
131
132 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
133 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
134
135 success = buffer_get_char(&m);
136 if (success == 0)
137 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
138
139 if ((p = BN_new()) == NULL)
140 fatal("%s: BN_new failed", __func__);
141 if ((g = BN_new()) == NULL)
142 fatal("%s: BN_new failed", __func__);
143 buffer_get_bignum2(&m, p);
144 buffer_get_bignum2(&m, g);
145
146 debug3("%s: remaining %d", __func__, buffer_len(&m));
147 buffer_free(&m);
148
149 return (dh_new_group(g, p));
150}
151
152int
153mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
154{
155 Kex *kex = *pmonitor->m_pkex;
156 Buffer m;
157
158 debug3("%s entering", __func__);
159
160 buffer_init(&m);
161 buffer_put_int(&m, kex->host_key_index(key));
162 buffer_put_string(&m, data, datalen);
163
164 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
165
166 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
167 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
168 *sigp = buffer_get_string(&m, lenp);
169 buffer_free(&m);
170
171 return (0);
172}
173
174struct passwd *
175mm_getpwnamallow(const char *login)
176{
177 Buffer m;
178 struct passwd *pw;
179 u_int pwlen;
180
181 debug3("%s entering", __func__);
182
183 buffer_init(&m);
184 buffer_put_cstring(&m, login);
185
186 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
187
188 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
189 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
190
191 if (buffer_get_char(&m) == 0) {
192 buffer_free(&m);
193 return (NULL);
194 }
195 pw = buffer_get_string(&m, &pwlen);
196 if (pwlen != sizeof(struct passwd))
197 fatal("%s: struct passwd size mismatch", __func__);
198 pw->pw_name = buffer_get_string(&m, NULL);
199 pw->pw_passwd = buffer_get_string(&m, NULL);
200 pw->pw_gecos = buffer_get_string(&m, NULL);
201#ifdef HAVE_PW_CLASS_IN_PASSWD
202 pw->pw_class = buffer_get_string(&m, NULL);
203#endif
204 pw->pw_dir = buffer_get_string(&m, NULL);
205 pw->pw_shell = buffer_get_string(&m, NULL);
206 buffer_free(&m);
207
208 return (pw);
209}
210
|
211char* mm_auth2_read_banner(void)
| 211char *mm_auth2_read_banner(void)
|
212{
213 Buffer m;
214 char *banner;
215
216 debug3("%s entering", __func__);
217
218 buffer_init(&m);
219 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
220 buffer_clear(&m);
221
222 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTH2_READ_BANNER, &m);
223 banner = buffer_get_string(&m, NULL);
224 buffer_free(&m);
225
226 return (banner);
227}
228
229/* Inform the privileged process about service and style */
230
231void
232mm_inform_authserv(char *service, char *style)
233{
234 Buffer m;
235
236 debug3("%s entering", __func__);
237
238 buffer_init(&m);
239 buffer_put_cstring(&m, service);
240 buffer_put_cstring(&m, style ? style : "");
241
242 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
243
244 buffer_free(&m);
245}
246
247/* Do the password authentication */
248int
249mm_auth_password(Authctxt *authctxt, char *password)
250{
251 Buffer m;
252 int authenticated = 0;
253
254 debug3("%s entering", __func__);
255
256 buffer_init(&m);
257 buffer_put_cstring(&m, password);
258 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
259
260 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
261 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
262
263 authenticated = buffer_get_int(&m);
264
265 buffer_free(&m);
266
267 debug3("%s: user %sauthenticated",
268 __func__, authenticated ? "" : "not ");
269 return (authenticated);
270}
271
272int
273mm_user_key_allowed(struct passwd *pw, Key *key)
274{
275 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
276}
277
278int
279mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
280 Key *key)
281{
282 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
283}
284
285int
286mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
287 char *host, Key *key)
288{
289 int ret;
290
291 key->type = KEY_RSA; /* XXX hack for key_to_blob */
292 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
293 key->type = KEY_RSA1;
294 return (ret);
295}
296
297static void
298mm_send_debug(Buffer *m)
299{
300 char *msg;
301
302 while (buffer_len(m)) {
303 msg = buffer_get_string(m, NULL);
304 debug3("%s: Sending debug: %s", __func__, msg);
305 packet_send_debug("%s", msg);
306 xfree(msg);
307 }
308}
309
310int
311mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
312{
313 Buffer m;
314 u_char *blob;
315 u_int len;
316 int allowed = 0;
317
318 debug3("%s entering", __func__);
319
320 /* Convert the key to a blob and the pass it over */
321 if (!key_to_blob(key, &blob, &len))
322 return (0);
323
324 buffer_init(&m);
325 buffer_put_int(&m, type);
326 buffer_put_cstring(&m, user ? user : "");
327 buffer_put_cstring(&m, host ? host : "");
328 buffer_put_string(&m, blob, len);
329 xfree(blob);
330
331 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
332
333 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
334 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
335
336 allowed = buffer_get_int(&m);
337
338 /* Send potential debug messages */
339 mm_send_debug(&m);
340
341 buffer_free(&m);
342
343 return (allowed);
344}
345
346/*
347 * This key verify needs to send the key type along, because the
348 * privileged parent makes the decision if the key is allowed
349 * for authentication.
350 */
351
352int
353mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
354{
355 Buffer m;
356 u_char *blob;
357 u_int len;
358 int verified = 0;
359
360 debug3("%s entering", __func__);
361
362 /* Convert the key to a blob and the pass it over */
363 if (!key_to_blob(key, &blob, &len))
364 return (0);
365
366 buffer_init(&m);
367 buffer_put_string(&m, blob, len);
368 buffer_put_string(&m, sig, siglen);
369 buffer_put_string(&m, data, datalen);
370 xfree(blob);
371
372 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
373
374 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
375 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
376
377 verified = buffer_get_int(&m);
378
379 buffer_free(&m);
380
381 return (verified);
382}
383
384/* Export key state after authentication */
385Newkeys *
386mm_newkeys_from_blob(u_char *blob, int blen)
387{
388 Buffer b;
389 u_int len;
390 Newkeys *newkey = NULL;
391 Enc *enc;
392 Mac *mac;
393 Comp *comp;
394
395 debug3("%s: %p(%d)", __func__, blob, blen);
396#ifdef DEBUG_PK
397 dump_base64(stderr, blob, blen);
398#endif
399 buffer_init(&b);
400 buffer_append(&b, blob, blen);
401
402 newkey = xmalloc(sizeof(*newkey));
403 enc = &newkey->enc;
404 mac = &newkey->mac;
405 comp = &newkey->comp;
406
407 /* Enc structure */
408 enc->name = buffer_get_string(&b, NULL);
409 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
410 enc->enabled = buffer_get_int(&b);
411 enc->block_size = buffer_get_int(&b);
412 enc->key = buffer_get_string(&b, &enc->key_len);
413 enc->iv = buffer_get_string(&b, &len);
414 if (len != enc->block_size)
| 212{
213 Buffer m;
214 char *banner;
215
216 debug3("%s entering", __func__);
217
218 buffer_init(&m);
219 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
220 buffer_clear(&m);
221
222 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTH2_READ_BANNER, &m);
223 banner = buffer_get_string(&m, NULL);
224 buffer_free(&m);
225
226 return (banner);
227}
228
229/* Inform the privileged process about service and style */
230
231void
232mm_inform_authserv(char *service, char *style)
233{
234 Buffer m;
235
236 debug3("%s entering", __func__);
237
238 buffer_init(&m);
239 buffer_put_cstring(&m, service);
240 buffer_put_cstring(&m, style ? style : "");
241
242 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
243
244 buffer_free(&m);
245}
246
247/* Do the password authentication */
248int
249mm_auth_password(Authctxt *authctxt, char *password)
250{
251 Buffer m;
252 int authenticated = 0;
253
254 debug3("%s entering", __func__);
255
256 buffer_init(&m);
257 buffer_put_cstring(&m, password);
258 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
259
260 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
261 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
262
263 authenticated = buffer_get_int(&m);
264
265 buffer_free(&m);
266
267 debug3("%s: user %sauthenticated",
268 __func__, authenticated ? "" : "not ");
269 return (authenticated);
270}
271
272int
273mm_user_key_allowed(struct passwd *pw, Key *key)
274{
275 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
276}
277
278int
279mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
280 Key *key)
281{
282 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
283}
284
285int
286mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
287 char *host, Key *key)
288{
289 int ret;
290
291 key->type = KEY_RSA; /* XXX hack for key_to_blob */
292 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
293 key->type = KEY_RSA1;
294 return (ret);
295}
296
297static void
298mm_send_debug(Buffer *m)
299{
300 char *msg;
301
302 while (buffer_len(m)) {
303 msg = buffer_get_string(m, NULL);
304 debug3("%s: Sending debug: %s", __func__, msg);
305 packet_send_debug("%s", msg);
306 xfree(msg);
307 }
308}
309
310int
311mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
312{
313 Buffer m;
314 u_char *blob;
315 u_int len;
316 int allowed = 0;
317
318 debug3("%s entering", __func__);
319
320 /* Convert the key to a blob and the pass it over */
321 if (!key_to_blob(key, &blob, &len))
322 return (0);
323
324 buffer_init(&m);
325 buffer_put_int(&m, type);
326 buffer_put_cstring(&m, user ? user : "");
327 buffer_put_cstring(&m, host ? host : "");
328 buffer_put_string(&m, blob, len);
329 xfree(blob);
330
331 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
332
333 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
334 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
335
336 allowed = buffer_get_int(&m);
337
338 /* Send potential debug messages */
339 mm_send_debug(&m);
340
341 buffer_free(&m);
342
343 return (allowed);
344}
345
346/*
347 * This key verify needs to send the key type along, because the
348 * privileged parent makes the decision if the key is allowed
349 * for authentication.
350 */
351
352int
353mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
354{
355 Buffer m;
356 u_char *blob;
357 u_int len;
358 int verified = 0;
359
360 debug3("%s entering", __func__);
361
362 /* Convert the key to a blob and the pass it over */
363 if (!key_to_blob(key, &blob, &len))
364 return (0);
365
366 buffer_init(&m);
367 buffer_put_string(&m, blob, len);
368 buffer_put_string(&m, sig, siglen);
369 buffer_put_string(&m, data, datalen);
370 xfree(blob);
371
372 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
373
374 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
375 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
376
377 verified = buffer_get_int(&m);
378
379 buffer_free(&m);
380
381 return (verified);
382}
383
384/* Export key state after authentication */
385Newkeys *
386mm_newkeys_from_blob(u_char *blob, int blen)
387{
388 Buffer b;
389 u_int len;
390 Newkeys *newkey = NULL;
391 Enc *enc;
392 Mac *mac;
393 Comp *comp;
394
395 debug3("%s: %p(%d)", __func__, blob, blen);
396#ifdef DEBUG_PK
397 dump_base64(stderr, blob, blen);
398#endif
399 buffer_init(&b);
400 buffer_append(&b, blob, blen);
401
402 newkey = xmalloc(sizeof(*newkey));
403 enc = &newkey->enc;
404 mac = &newkey->mac;
405 comp = &newkey->comp;
406
407 /* Enc structure */
408 enc->name = buffer_get_string(&b, NULL);
409 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
410 enc->enabled = buffer_get_int(&b);
411 enc->block_size = buffer_get_int(&b);
412 enc->key = buffer_get_string(&b, &enc->key_len);
413 enc->iv = buffer_get_string(&b, &len);
414 if (len != enc->block_size)
|
415 fatal("%s: bad ivlen: expected %d != %d", __func__,
| 415 fatal("%s: bad ivlen: expected %u != %u", __func__,
|
416 enc->block_size, len);
417
418 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
419 fatal("%s: bad cipher name %s or pointer %p", __func__,
420 enc->name, enc->cipher);
421
422 /* Mac structure */
423 mac->name = buffer_get_string(&b, NULL);
424 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
425 fatal("%s: can not init mac %s", __func__, mac->name);
426 mac->enabled = buffer_get_int(&b);
427 mac->key = buffer_get_string(&b, &len);
428 if (len > mac->key_len)
| 416 enc->block_size, len);
417
418 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
419 fatal("%s: bad cipher name %s or pointer %p", __func__,
420 enc->name, enc->cipher);
421
422 /* Mac structure */
423 mac->name = buffer_get_string(&b, NULL);
424 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
425 fatal("%s: can not init mac %s", __func__, mac->name);
426 mac->enabled = buffer_get_int(&b);
427 mac->key = buffer_get_string(&b, &len);
428 if (len > mac->key_len)
|
429 fatal("%s: bad mac key length: %d > %d", __func__, len,
| 429 fatal("%s: bad mac key length: %u > %d", __func__, len,
|
430 mac->key_len);
431 mac->key_len = len;
432
433 /* Comp structure */
434 comp->type = buffer_get_int(&b);
435 comp->enabled = buffer_get_int(&b);
436 comp->name = buffer_get_string(&b, NULL);
437
438 len = buffer_len(&b);
439 if (len != 0)
| 430 mac->key_len);
431 mac->key_len = len;
432
433 /* Comp structure */
434 comp->type = buffer_get_int(&b);
435 comp->enabled = buffer_get_int(&b);
436 comp->name = buffer_get_string(&b, NULL);
437
438 len = buffer_len(&b);
439 if (len != 0)
|
440 error("newkeys_from_blob: remaining bytes in blob %d", len);
| 440 error("newkeys_from_blob: remaining bytes in blob %u", len);
|
441 buffer_free(&b);
442 return (newkey);
443}
444
445int
446mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
447{
448 Buffer b;
449 int len;
| 441 buffer_free(&b);
442 return (newkey);
443}
444
445int
446mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
447{
448 Buffer b;
449 int len;
|
450 u_char *buf;
| |
451 Enc *enc;
452 Mac *mac;
453 Comp *comp;
454 Newkeys *newkey = newkeys[mode];
455
456 debug3("%s: converting %p", __func__, newkey);
457
458 if (newkey == NULL) {
459 error("%s: newkey == NULL", __func__);
460 return 0;
461 }
462 enc = &newkey->enc;
463 mac = &newkey->mac;
464 comp = &newkey->comp;
465
466 buffer_init(&b);
467 /* Enc structure */
468 buffer_put_cstring(&b, enc->name);
469 /* The cipher struct is constant and shared, you export pointer */
470 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
471 buffer_put_int(&b, enc->enabled);
472 buffer_put_int(&b, enc->block_size);
473 buffer_put_string(&b, enc->key, enc->key_len);
474 packet_get_keyiv(mode, enc->iv, enc->block_size);
475 buffer_put_string(&b, enc->iv, enc->block_size);
476
477 /* Mac structure */
478 buffer_put_cstring(&b, mac->name);
479 buffer_put_int(&b, mac->enabled);
480 buffer_put_string(&b, mac->key, mac->key_len);
481
482 /* Comp structure */
483 buffer_put_int(&b, comp->type);
484 buffer_put_int(&b, comp->enabled);
485 buffer_put_cstring(&b, comp->name);
486
487 len = buffer_len(&b);
| 450 Enc *enc;
451 Mac *mac;
452 Comp *comp;
453 Newkeys *newkey = newkeys[mode];
454
455 debug3("%s: converting %p", __func__, newkey);
456
457 if (newkey == NULL) {
458 error("%s: newkey == NULL", __func__);
459 return 0;
460 }
461 enc = &newkey->enc;
462 mac = &newkey->mac;
463 comp = &newkey->comp;
464
465 buffer_init(&b);
466 /* Enc structure */
467 buffer_put_cstring(&b, enc->name);
468 /* The cipher struct is constant and shared, you export pointer */
469 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
470 buffer_put_int(&b, enc->enabled);
471 buffer_put_int(&b, enc->block_size);
472 buffer_put_string(&b, enc->key, enc->key_len);
473 packet_get_keyiv(mode, enc->iv, enc->block_size);
474 buffer_put_string(&b, enc->iv, enc->block_size);
475
476 /* Mac structure */
477 buffer_put_cstring(&b, mac->name);
478 buffer_put_int(&b, mac->enabled);
479 buffer_put_string(&b, mac->key, mac->key_len);
480
481 /* Comp structure */
482 buffer_put_int(&b, comp->type);
483 buffer_put_int(&b, comp->enabled);
484 buffer_put_cstring(&b, comp->name);
485
486 len = buffer_len(&b);
|
488 buf = xmalloc(len);
489 memcpy(buf, buffer_ptr(&b), len);
490 memset(buffer_ptr(&b), 0, len);
491 buffer_free(&b);
| |
492 if (lenp != NULL)
493 *lenp = len;
| 487 if (lenp != NULL)
488 *lenp = len;
|
494 if (blobp != NULL)
495 *blobp = buf;
| 489 if (blobp != NULL) {
490 *blobp = xmalloc(len);
491 memcpy(*blobp, buffer_ptr(&b), len);
492 }
493 memset(buffer_ptr(&b), 0, len);
494 buffer_free(&b);
|
496 return len;
497}
498
499static void
500mm_send_kex(Buffer *m, Kex *kex)
501{
502 buffer_put_string(m, kex->session_id, kex->session_id_len);
503 buffer_put_int(m, kex->we_need);
504 buffer_put_int(m, kex->hostkey_type);
505 buffer_put_int(m, kex->kex_type);
506 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
507 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
508 buffer_put_int(m, kex->flags);
509 buffer_put_cstring(m, kex->client_version_string);
510 buffer_put_cstring(m, kex->server_version_string);
511}
512
513void
514mm_send_keystate(struct monitor *pmonitor)
515{
516 Buffer m;
517 u_char *blob, *p;
518 u_int bloblen, plen;
519
520 buffer_init(&m);
521
522 if (!compat20) {
523 u_char iv[24];
524 u_char *key;
525 u_int ivlen, keylen;
526
527 buffer_put_int(&m, packet_get_protocol_flags());
528
529 buffer_put_int(&m, packet_get_ssh1_cipher());
530
531 debug3("%s: Sending ssh1 KEY+IV", __func__);
532 keylen = packet_get_encryption_key(NULL);
533 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
534 keylen = packet_get_encryption_key(key);
535 buffer_put_string(&m, key, keylen);
536 memset(key, 0, keylen);
537 xfree(key);
538
539 ivlen = packet_get_keyiv_len(MODE_OUT);
540 packet_get_keyiv(MODE_OUT, iv, ivlen);
541 buffer_put_string(&m, iv, ivlen);
542 ivlen = packet_get_keyiv_len(MODE_OUT);
543 packet_get_keyiv(MODE_IN, iv, ivlen);
544 buffer_put_string(&m, iv, ivlen);
545 goto skip;
546 } else {
547 /* Kex for rekeying */
548 mm_send_kex(&m, *pmonitor->m_pkex);
549 }
550
551 debug3("%s: Sending new keys: %p %p",
552 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
553
554 /* Keys from Kex */
555 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
556 fatal("%s: conversion of newkeys failed", __func__);
557
558 buffer_put_string(&m, blob, bloblen);
559 xfree(blob);
560
561 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
562 fatal("%s: conversion of newkeys failed", __func__);
563
564 buffer_put_string(&m, blob, bloblen);
565 xfree(blob);
566
567 buffer_put_int(&m, packet_get_seqnr(MODE_OUT));
568 buffer_put_int(&m, packet_get_seqnr(MODE_IN));
569
570 debug3("%s: New keys have been sent", __func__);
571 skip:
572 /* More key context */
573 plen = packet_get_keycontext(MODE_OUT, NULL);
574 p = xmalloc(plen+1);
575 packet_get_keycontext(MODE_OUT, p);
576 buffer_put_string(&m, p, plen);
577 xfree(p);
578
579 plen = packet_get_keycontext(MODE_IN, NULL);
580 p = xmalloc(plen+1);
581 packet_get_keycontext(MODE_IN, p);
582 buffer_put_string(&m, p, plen);
583 xfree(p);
584
585 /* Compression state */
586 debug3("%s: Sending compression state", __func__);
587 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
588 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
589
590 /* Network I/O buffers */
591 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
592 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
593
594 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
595 debug3("%s: Finished sending state", __func__);
596
597 buffer_free(&m);
598}
599
600int
601mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
602{
603 Buffer m;
| 495 return len;
496}
497
498static void
499mm_send_kex(Buffer *m, Kex *kex)
500{
501 buffer_put_string(m, kex->session_id, kex->session_id_len);
502 buffer_put_int(m, kex->we_need);
503 buffer_put_int(m, kex->hostkey_type);
504 buffer_put_int(m, kex->kex_type);
505 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
506 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
507 buffer_put_int(m, kex->flags);
508 buffer_put_cstring(m, kex->client_version_string);
509 buffer_put_cstring(m, kex->server_version_string);
510}
511
512void
513mm_send_keystate(struct monitor *pmonitor)
514{
515 Buffer m;
516 u_char *blob, *p;
517 u_int bloblen, plen;
518
519 buffer_init(&m);
520
521 if (!compat20) {
522 u_char iv[24];
523 u_char *key;
524 u_int ivlen, keylen;
525
526 buffer_put_int(&m, packet_get_protocol_flags());
527
528 buffer_put_int(&m, packet_get_ssh1_cipher());
529
530 debug3("%s: Sending ssh1 KEY+IV", __func__);
531 keylen = packet_get_encryption_key(NULL);
532 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
533 keylen = packet_get_encryption_key(key);
534 buffer_put_string(&m, key, keylen);
535 memset(key, 0, keylen);
536 xfree(key);
537
538 ivlen = packet_get_keyiv_len(MODE_OUT);
539 packet_get_keyiv(MODE_OUT, iv, ivlen);
540 buffer_put_string(&m, iv, ivlen);
541 ivlen = packet_get_keyiv_len(MODE_OUT);
542 packet_get_keyiv(MODE_IN, iv, ivlen);
543 buffer_put_string(&m, iv, ivlen);
544 goto skip;
545 } else {
546 /* Kex for rekeying */
547 mm_send_kex(&m, *pmonitor->m_pkex);
548 }
549
550 debug3("%s: Sending new keys: %p %p",
551 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
552
553 /* Keys from Kex */
554 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
555 fatal("%s: conversion of newkeys failed", __func__);
556
557 buffer_put_string(&m, blob, bloblen);
558 xfree(blob);
559
560 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
561 fatal("%s: conversion of newkeys failed", __func__);
562
563 buffer_put_string(&m, blob, bloblen);
564 xfree(blob);
565
566 buffer_put_int(&m, packet_get_seqnr(MODE_OUT));
567 buffer_put_int(&m, packet_get_seqnr(MODE_IN));
568
569 debug3("%s: New keys have been sent", __func__);
570 skip:
571 /* More key context */
572 plen = packet_get_keycontext(MODE_OUT, NULL);
573 p = xmalloc(plen+1);
574 packet_get_keycontext(MODE_OUT, p);
575 buffer_put_string(&m, p, plen);
576 xfree(p);
577
578 plen = packet_get_keycontext(MODE_IN, NULL);
579 p = xmalloc(plen+1);
580 packet_get_keycontext(MODE_IN, p);
581 buffer_put_string(&m, p, plen);
582 xfree(p);
583
584 /* Compression state */
585 debug3("%s: Sending compression state", __func__);
586 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
587 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
588
589 /* Network I/O buffers */
590 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
591 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
592
593 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
594 debug3("%s: Finished sending state", __func__);
595
596 buffer_free(&m);
597}
598
599int
600mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
601{
602 Buffer m;
|
604 u_char *p;
| 603 char *p;
|
605 int success = 0;
606
607 buffer_init(&m);
608 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
609
610 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
611 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
612
613 success = buffer_get_int(&m);
614 if (success == 0) {
615 debug3("%s: pty alloc failed", __func__);
616 buffer_free(&m);
617 return (0);
618 }
619 p = buffer_get_string(&m, NULL);
620 buffer_free(&m);
621
622 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
623 xfree(p);
624
625 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
626 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
627
628 /* Success */
629 return (1);
630}
631
632void
633mm_session_pty_cleanup2(void *session)
634{
635 Session *s = session;
636 Buffer m;
637
638 if (s->ttyfd == -1)
639 return;
640 buffer_init(&m);
641 buffer_put_cstring(&m, s->tty);
642 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
643 buffer_free(&m);
644
645 /* closed dup'ed master */
646 if (close(s->ptymaster) < 0)
647 error("close(s->ptymaster): %s", strerror(errno));
648
649 /* unlink pty from session */
650 s->ttyfd = -1;
651}
652
653#ifdef USE_PAM
654void
655mm_start_pam(char *user)
656{
657 Buffer m;
658
659 debug3("%s entering", __func__);
660
661 buffer_init(&m);
662 buffer_put_cstring(&m, user);
663
664 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
665
666 buffer_free(&m);
667}
668
669void *
670mm_pam_init_ctx(Authctxt *authctxt)
671{
672 Buffer m;
673 int success;
674
675 debug3("%s", __func__);
676 buffer_init(&m);
677 buffer_put_cstring(&m, authctxt->user);
678 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
679 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
680 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
681 success = buffer_get_int(&m);
682 if (success == 0) {
683 debug3("%s: pam_init_ctx failed", __func__);
684 buffer_free(&m);
685 return (NULL);
686 }
687 buffer_free(&m);
688 return (authctxt);
689}
690
691int
692mm_pam_query(void *ctx, char **name, char **info,
693 u_int *num, char ***prompts, u_int **echo_on)
694{
695 Buffer m;
696 int i, ret;
697
698 debug3("%s", __func__);
699 buffer_init(&m);
700 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
701 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
702 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
703 ret = buffer_get_int(&m);
704 debug3("%s: pam_query returned %d", __func__, ret);
705 *name = buffer_get_string(&m, NULL);
706 *info = buffer_get_string(&m, NULL);
707 *num = buffer_get_int(&m);
708 *prompts = xmalloc((*num + 1) * sizeof(char *));
709 *echo_on = xmalloc((*num + 1) * sizeof(u_int));
710 for (i = 0; i < *num; ++i) {
711 (*prompts)[i] = buffer_get_string(&m, NULL);
712 (*echo_on)[i] = buffer_get_int(&m);
713 }
714 buffer_free(&m);
715 return (ret);
716}
717
718int
719mm_pam_respond(void *ctx, u_int num, char **resp)
720{
721 Buffer m;
722 int i, ret;
723
724 debug3("%s", __func__);
725 buffer_init(&m);
726 buffer_put_int(&m, num);
727 for (i = 0; i < num; ++i)
728 buffer_put_cstring(&m, resp[i]);
729 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
730 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
731 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
732 ret = buffer_get_int(&m);
733 debug3("%s: pam_respond returned %d", __func__, ret);
734 buffer_free(&m);
735 return (ret);
736}
737
738void
739mm_pam_free_ctx(void *ctxtp)
740{
741 Buffer m;
742
743 debug3("%s", __func__);
744 buffer_init(&m);
745 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
746 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
747 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
748 buffer_free(&m);
749}
750#endif /* USE_PAM */
751
752/* Request process termination */
753
754void
755mm_terminate(void)
756{
757 Buffer m;
758
759 buffer_init(&m);
760 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
761 buffer_free(&m);
762}
763
764int
765mm_ssh1_session_key(BIGNUM *num)
766{
767 int rsafail;
768 Buffer m;
769
770 buffer_init(&m);
771 buffer_put_bignum2(&m, num);
772 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
773
774 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
775
776 rsafail = buffer_get_int(&m);
777 buffer_get_bignum2(&m, num);
778
779 buffer_free(&m);
780
781 return (rsafail);
782}
783
784static void
785mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
786 char ***prompts, u_int **echo_on)
787{
788 *name = xstrdup("");
789 *infotxt = xstrdup("");
790 *numprompts = 1;
| 604 int success = 0;
605
606 buffer_init(&m);
607 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
608
609 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
610 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
611
612 success = buffer_get_int(&m);
613 if (success == 0) {
614 debug3("%s: pty alloc failed", __func__);
615 buffer_free(&m);
616 return (0);
617 }
618 p = buffer_get_string(&m, NULL);
619 buffer_free(&m);
620
621 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
622 xfree(p);
623
624 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
625 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
626
627 /* Success */
628 return (1);
629}
630
631void
632mm_session_pty_cleanup2(void *session)
633{
634 Session *s = session;
635 Buffer m;
636
637 if (s->ttyfd == -1)
638 return;
639 buffer_init(&m);
640 buffer_put_cstring(&m, s->tty);
641 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
642 buffer_free(&m);
643
644 /* closed dup'ed master */
645 if (close(s->ptymaster) < 0)
646 error("close(s->ptymaster): %s", strerror(errno));
647
648 /* unlink pty from session */
649 s->ttyfd = -1;
650}
651
652#ifdef USE_PAM
653void
654mm_start_pam(char *user)
655{
656 Buffer m;
657
658 debug3("%s entering", __func__);
659
660 buffer_init(&m);
661 buffer_put_cstring(&m, user);
662
663 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
664
665 buffer_free(&m);
666}
667
668void *
669mm_pam_init_ctx(Authctxt *authctxt)
670{
671 Buffer m;
672 int success;
673
674 debug3("%s", __func__);
675 buffer_init(&m);
676 buffer_put_cstring(&m, authctxt->user);
677 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
678 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
679 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
680 success = buffer_get_int(&m);
681 if (success == 0) {
682 debug3("%s: pam_init_ctx failed", __func__);
683 buffer_free(&m);
684 return (NULL);
685 }
686 buffer_free(&m);
687 return (authctxt);
688}
689
690int
691mm_pam_query(void *ctx, char **name, char **info,
692 u_int *num, char ***prompts, u_int **echo_on)
693{
694 Buffer m;
695 int i, ret;
696
697 debug3("%s", __func__);
698 buffer_init(&m);
699 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
700 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
701 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
702 ret = buffer_get_int(&m);
703 debug3("%s: pam_query returned %d", __func__, ret);
704 *name = buffer_get_string(&m, NULL);
705 *info = buffer_get_string(&m, NULL);
706 *num = buffer_get_int(&m);
707 *prompts = xmalloc((*num + 1) * sizeof(char *));
708 *echo_on = xmalloc((*num + 1) * sizeof(u_int));
709 for (i = 0; i < *num; ++i) {
710 (*prompts)[i] = buffer_get_string(&m, NULL);
711 (*echo_on)[i] = buffer_get_int(&m);
712 }
713 buffer_free(&m);
714 return (ret);
715}
716
717int
718mm_pam_respond(void *ctx, u_int num, char **resp)
719{
720 Buffer m;
721 int i, ret;
722
723 debug3("%s", __func__);
724 buffer_init(&m);
725 buffer_put_int(&m, num);
726 for (i = 0; i < num; ++i)
727 buffer_put_cstring(&m, resp[i]);
728 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
729 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
730 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
731 ret = buffer_get_int(&m);
732 debug3("%s: pam_respond returned %d", __func__, ret);
733 buffer_free(&m);
734 return (ret);
735}
736
737void
738mm_pam_free_ctx(void *ctxtp)
739{
740 Buffer m;
741
742 debug3("%s", __func__);
743 buffer_init(&m);
744 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
745 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
746 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
747 buffer_free(&m);
748}
749#endif /* USE_PAM */
750
751/* Request process termination */
752
753void
754mm_terminate(void)
755{
756 Buffer m;
757
758 buffer_init(&m);
759 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
760 buffer_free(&m);
761}
762
763int
764mm_ssh1_session_key(BIGNUM *num)
765{
766 int rsafail;
767 Buffer m;
768
769 buffer_init(&m);
770 buffer_put_bignum2(&m, num);
771 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
772
773 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
774
775 rsafail = buffer_get_int(&m);
776 buffer_get_bignum2(&m, num);
777
778 buffer_free(&m);
779
780 return (rsafail);
781}
782
783static void
784mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
785 char ***prompts, u_int **echo_on)
786{
787 *name = xstrdup("");
788 *infotxt = xstrdup("");
789 *numprompts = 1;
|
791 *prompts = xmalloc(*numprompts * sizeof(char*));
| 790 *prompts = xmalloc(*numprompts * sizeof(char *));
|
792 *echo_on = xmalloc(*numprompts * sizeof(u_int));
793 (*echo_on)[0] = 0;
794}
795
796int
797mm_bsdauth_query(void *ctx, char **name, char **infotxt,
798 u_int *numprompts, char ***prompts, u_int **echo_on)
799{
800 Buffer m;
801 int res;
802 char *challenge;
803
804 debug3("%s: entering", __func__);
805
806 buffer_init(&m);
807 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
808
809 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
810 &m);
811 res = buffer_get_int(&m);
812 if (res == -1) {
813 debug3("%s: no challenge", __func__);
814 buffer_free(&m);
815 return (-1);
816 }
817
818 /* Get the challenge, and format the response */
819 challenge = buffer_get_string(&m, NULL);
820 buffer_free(&m);
821
822 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
823 (*prompts)[0] = challenge;
824
825 debug3("%s: received challenge: %s", __func__, challenge);
826
827 return (0);
828}
829
830int
831mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
832{
833 Buffer m;
834 int authok;
835
836 debug3("%s: entering", __func__);
837 if (numresponses != 1)
838 return (-1);
839
840 buffer_init(&m);
841 buffer_put_cstring(&m, responses[0]);
842 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
843
844 mm_request_receive_expect(pmonitor->m_recvfd,
845 MONITOR_ANS_BSDAUTHRESPOND, &m);
846
847 authok = buffer_get_int(&m);
848 buffer_free(&m);
849
850 return ((authok == 0) ? -1 : 0);
851}
852
853#ifdef SKEY
854int
855mm_skey_query(void *ctx, char **name, char **infotxt,
856 u_int *numprompts, char ***prompts, u_int **echo_on)
857{
858 Buffer m;
859 int len, res;
860 char *p, *challenge;
861
862 debug3("%s: entering", __func__);
863
864 buffer_init(&m);
865 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
866
867 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
868 &m);
869 res = buffer_get_int(&m);
870 if (res == -1) {
871 debug3("%s: no challenge", __func__);
872 buffer_free(&m);
873 return (-1);
874 }
875
876 /* Get the challenge, and format the response */
877 challenge = buffer_get_string(&m, NULL);
878 buffer_free(&m);
879
880 debug3("%s: received challenge: %s", __func__, challenge);
881
882 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
883
884 len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
885 p = xmalloc(len);
886 strlcpy(p, challenge, len);
887 strlcat(p, SKEY_PROMPT, len);
888 (*prompts)[0] = p;
889 xfree(challenge);
890
891 return (0);
892}
893
894int
895mm_skey_respond(void *ctx, u_int numresponses, char **responses)
896{
897 Buffer m;
898 int authok;
899
900 debug3("%s: entering", __func__);
901 if (numresponses != 1)
902 return (-1);
903
904 buffer_init(&m);
905 buffer_put_cstring(&m, responses[0]);
906 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
907
908 mm_request_receive_expect(pmonitor->m_recvfd,
909 MONITOR_ANS_SKEYRESPOND, &m);
910
911 authok = buffer_get_int(&m);
912 buffer_free(&m);
913
914 return ((authok == 0) ? -1 : 0);
915}
916#endif
917
918void
919mm_ssh1_session_id(u_char session_id[16])
920{
921 Buffer m;
922 int i;
923
924 debug3("%s entering", __func__);
925
926 buffer_init(&m);
927 for (i = 0; i < 16; i++)
928 buffer_put_char(&m, session_id[i]);
929
930 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
931 buffer_free(&m);
932}
933
934int
935mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
936{
937 Buffer m;
938 Key *key;
939 u_char *blob;
940 u_int blen;
941 int allowed = 0;
942
943 debug3("%s entering", __func__);
944
945 buffer_init(&m);
946 buffer_put_bignum2(&m, client_n);
947
948 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
949 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
950
951 allowed = buffer_get_int(&m);
952
953 if (allowed && rkey != NULL) {
954 blob = buffer_get_string(&m, &blen);
955 if ((key = key_from_blob(blob, blen)) == NULL)
956 fatal("%s: key_from_blob failed", __func__);
957 *rkey = key;
958 xfree(blob);
959 }
960 mm_send_debug(&m);
961 buffer_free(&m);
962
963 return (allowed);
964}
965
966BIGNUM *
967mm_auth_rsa_generate_challenge(Key *key)
968{
969 Buffer m;
970 BIGNUM *challenge;
971 u_char *blob;
972 u_int blen;
973
974 debug3("%s entering", __func__);
975
976 if ((challenge = BN_new()) == NULL)
977 fatal("%s: BN_new failed", __func__);
978
979 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
980 if (key_to_blob(key, &blob, &blen) == 0)
981 fatal("%s: key_to_blob failed", __func__);
982 key->type = KEY_RSA1;
983
984 buffer_init(&m);
985 buffer_put_string(&m, blob, blen);
986 xfree(blob);
987
988 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
989 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
990
991 buffer_get_bignum2(&m, challenge);
992 buffer_free(&m);
993
994 return (challenge);
995}
996
997int
998mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
999{
1000 Buffer m;
1001 u_char *blob;
1002 u_int blen;
1003 int success = 0;
1004
1005 debug3("%s entering", __func__);
1006
1007 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1008 if (key_to_blob(key, &blob, &blen) == 0)
1009 fatal("%s: key_to_blob failed", __func__);
1010 key->type = KEY_RSA1;
1011
1012 buffer_init(&m);
1013 buffer_put_string(&m, blob, blen);
1014 buffer_put_string(&m, response, 16);
1015 xfree(blob);
1016
1017 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1018 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1019
1020 success = buffer_get_int(&m);
1021 buffer_free(&m);
1022
1023 return (success);
1024}
| 791 *echo_on = xmalloc(*numprompts * sizeof(u_int));
792 (*echo_on)[0] = 0;
793}
794
795int
796mm_bsdauth_query(void *ctx, char **name, char **infotxt,
797 u_int *numprompts, char ***prompts, u_int **echo_on)
798{
799 Buffer m;
800 int res;
801 char *challenge;
802
803 debug3("%s: entering", __func__);
804
805 buffer_init(&m);
806 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
807
808 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
809 &m);
810 res = buffer_get_int(&m);
811 if (res == -1) {
812 debug3("%s: no challenge", __func__);
813 buffer_free(&m);
814 return (-1);
815 }
816
817 /* Get the challenge, and format the response */
818 challenge = buffer_get_string(&m, NULL);
819 buffer_free(&m);
820
821 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
822 (*prompts)[0] = challenge;
823
824 debug3("%s: received challenge: %s", __func__, challenge);
825
826 return (0);
827}
828
829int
830mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
831{
832 Buffer m;
833 int authok;
834
835 debug3("%s: entering", __func__);
836 if (numresponses != 1)
837 return (-1);
838
839 buffer_init(&m);
840 buffer_put_cstring(&m, responses[0]);
841 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
842
843 mm_request_receive_expect(pmonitor->m_recvfd,
844 MONITOR_ANS_BSDAUTHRESPOND, &m);
845
846 authok = buffer_get_int(&m);
847 buffer_free(&m);
848
849 return ((authok == 0) ? -1 : 0);
850}
851
852#ifdef SKEY
853int
854mm_skey_query(void *ctx, char **name, char **infotxt,
855 u_int *numprompts, char ***prompts, u_int **echo_on)
856{
857 Buffer m;
858 int len, res;
859 char *p, *challenge;
860
861 debug3("%s: entering", __func__);
862
863 buffer_init(&m);
864 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
865
866 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
867 &m);
868 res = buffer_get_int(&m);
869 if (res == -1) {
870 debug3("%s: no challenge", __func__);
871 buffer_free(&m);
872 return (-1);
873 }
874
875 /* Get the challenge, and format the response */
876 challenge = buffer_get_string(&m, NULL);
877 buffer_free(&m);
878
879 debug3("%s: received challenge: %s", __func__, challenge);
880
881 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
882
883 len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
884 p = xmalloc(len);
885 strlcpy(p, challenge, len);
886 strlcat(p, SKEY_PROMPT, len);
887 (*prompts)[0] = p;
888 xfree(challenge);
889
890 return (0);
891}
892
893int
894mm_skey_respond(void *ctx, u_int numresponses, char **responses)
895{
896 Buffer m;
897 int authok;
898
899 debug3("%s: entering", __func__);
900 if (numresponses != 1)
901 return (-1);
902
903 buffer_init(&m);
904 buffer_put_cstring(&m, responses[0]);
905 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
906
907 mm_request_receive_expect(pmonitor->m_recvfd,
908 MONITOR_ANS_SKEYRESPOND, &m);
909
910 authok = buffer_get_int(&m);
911 buffer_free(&m);
912
913 return ((authok == 0) ? -1 : 0);
914}
915#endif
916
917void
918mm_ssh1_session_id(u_char session_id[16])
919{
920 Buffer m;
921 int i;
922
923 debug3("%s entering", __func__);
924
925 buffer_init(&m);
926 for (i = 0; i < 16; i++)
927 buffer_put_char(&m, session_id[i]);
928
929 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
930 buffer_free(&m);
931}
932
933int
934mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
935{
936 Buffer m;
937 Key *key;
938 u_char *blob;
939 u_int blen;
940 int allowed = 0;
941
942 debug3("%s entering", __func__);
943
944 buffer_init(&m);
945 buffer_put_bignum2(&m, client_n);
946
947 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
948 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
949
950 allowed = buffer_get_int(&m);
951
952 if (allowed && rkey != NULL) {
953 blob = buffer_get_string(&m, &blen);
954 if ((key = key_from_blob(blob, blen)) == NULL)
955 fatal("%s: key_from_blob failed", __func__);
956 *rkey = key;
957 xfree(blob);
958 }
959 mm_send_debug(&m);
960 buffer_free(&m);
961
962 return (allowed);
963}
964
965BIGNUM *
966mm_auth_rsa_generate_challenge(Key *key)
967{
968 Buffer m;
969 BIGNUM *challenge;
970 u_char *blob;
971 u_int blen;
972
973 debug3("%s entering", __func__);
974
975 if ((challenge = BN_new()) == NULL)
976 fatal("%s: BN_new failed", __func__);
977
978 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
979 if (key_to_blob(key, &blob, &blen) == 0)
980 fatal("%s: key_to_blob failed", __func__);
981 key->type = KEY_RSA1;
982
983 buffer_init(&m);
984 buffer_put_string(&m, blob, blen);
985 xfree(blob);
986
987 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
988 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
989
990 buffer_get_bignum2(&m, challenge);
991 buffer_free(&m);
992
993 return (challenge);
994}
995
996int
997mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
998{
999 Buffer m;
1000 u_char *blob;
1001 u_int blen;
1002 int success = 0;
1003
1004 debug3("%s entering", __func__);
1005
1006 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1007 if (key_to_blob(key, &blob, &blen) == 0)
1008 fatal("%s: key_to_blob failed", __func__);
1009 key->type = KEY_RSA1;
1010
1011 buffer_init(&m);
1012 buffer_put_string(&m, blob, blen);
1013 buffer_put_string(&m, response, 16);
1014 xfree(blob);
1015
1016 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1017 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1018
1019 success = buffer_get_int(&m);
1020 buffer_free(&m);
1021
1022 return (success);
1023}
|
| 1024
1025#ifdef KRB4
1026int
1027mm_auth_krb4(Authctxt *authctxt, void *_auth, char **client, void *_reply)
1028{
1029 KTEXT auth, reply;
1030 Buffer m;
1031 u_int rlen;
1032 int success = 0;
1033 char *p;
1034
1035 debug3("%s entering", __func__);
1036 auth = _auth;
1037 reply = _reply;
1038
1039 buffer_init(&m);
1040 buffer_put_string(&m, auth->dat, auth->length);
1041
1042 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KRB4, &m);
1043 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KRB4, &m);
1044
1045 success = buffer_get_int(&m);
1046 if (success) {
1047 *client = buffer_get_string(&m, NULL);
1048 p = buffer_get_string(&m, &rlen);
1049 if (rlen >= MAX_KTXT_LEN)
1050 fatal("%s: reply from monitor too large", __func__);
1051 reply->length = rlen;
1052 memcpy(reply->dat, p, rlen);
1053 memset(p, 0, rlen);
1054 xfree(p);
1055 }
1056 buffer_free(&m);
1057 return (success);
1058}
1059#endif
1060
1061#ifdef KRB5
1062int
1063mm_auth_krb5(void *ctx, void *argp, char **userp, void *resp)
1064{
1065 krb5_data *tkt, *reply;
1066 Buffer m;
1067 int success;
1068
1069 debug3("%s entering", __func__);
1070 tkt = (krb5_data *) argp;
1071 reply = (krb5_data *) resp;
1072
1073 buffer_init(&m);
1074 buffer_put_string(&m, tkt->data, tkt->length);
1075
1076 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KRB5, &m);
1077 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KRB5, &m);
1078
1079 success = buffer_get_int(&m);
1080 if (success) {
1081 u_int len;
1082
1083 *userp = buffer_get_string(&m, NULL);
1084 reply->data = buffer_get_string(&m, &len);
1085 reply->length = len;
1086 } else {
1087 memset(reply, 0, sizeof(*reply));
1088 *userp = NULL;
1089 }
1090
1091 buffer_free(&m);
1092 return (success);
1093}
1094#endif
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