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-rw-r--r--authfd.c840
-rw-r--r--authfd.h60
-rw-r--r--clientloop.c20
-rw-r--r--monitor.c42
-rw-r--r--session.c10
-rw-r--r--ssh-add.c259
-rw-r--r--ssh.c11
-rw-r--r--sshconnect1.c72
-rw-r--r--sshconnect2.c171
-rw-r--r--sshd.c43
10 files changed, 846 insertions, 682 deletions
diff --git a/authfd.c b/authfd.c
index 2d5a8dd5b..5d9414faf 100644
--- a/authfd.c
+++ b/authfd.c
@@ -1,4 +1,4 @@
1/* $OpenBSD: authfd.c,v 1.93 2014/04/29 18:01:49 markus Exp $ */ 1/* $OpenBSD: authfd.c,v 1.94 2015/01/14 20:05:27 djm Exp $ */
2/* 2/*
3 * Author: Tatu Ylonen <ylo@cs.hut.fi> 3 * Author: Tatu Ylonen <ylo@cs.hut.fi>
4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -47,124 +47,121 @@
47#include <stdarg.h> 47#include <stdarg.h>
48#include <string.h> 48#include <string.h>
49#include <unistd.h> 49#include <unistd.h>
50#include <errno.h>
50 51
51#include "xmalloc.h" 52#include "xmalloc.h"
52#include "ssh.h" 53#include "ssh.h"
53#include "rsa.h" 54#include "rsa.h"
54#include "buffer.h" 55#include "sshbuf.h"
55#include "key.h" 56#include "sshkey.h"
56#include "authfd.h" 57#include "authfd.h"
57#include "cipher.h" 58#include "cipher.h"
58#include "kex.h"
59#include "compat.h" 59#include "compat.h"
60#include "log.h" 60#include "log.h"
61#include "atomicio.h" 61#include "atomicio.h"
62#include "misc.h" 62#include "misc.h"
63#include "ssherr.h"
63 64
64static int agent_present = 0; 65#define MAX_AGENT_IDENTITIES 2048 /* Max keys in agent reply */
65 66#define MAX_AGENT_REPLY_LEN (256 * 1024) /* Max bytes in agent reply */
66/* helper */
67int decode_reply(int type);
68 67
69/* macro to check for "agent failure" message */ 68/* macro to check for "agent failure" message */
70#define agent_failed(x) \ 69#define agent_failed(x) \
71 ((x == SSH_AGENT_FAILURE) || (x == SSH_COM_AGENT2_FAILURE) || \ 70 ((x == SSH_AGENT_FAILURE) || \
71 (x == SSH_COM_AGENT2_FAILURE) || \
72 (x == SSH2_AGENT_FAILURE)) 72 (x == SSH2_AGENT_FAILURE))
73 73
74int 74/* Convert success/failure response from agent to a err.h status */
75ssh_agent_present(void) 75static int
76decode_reply(u_char type)
76{ 77{
77 int authfd; 78 if (agent_failed(type))
78 79 return SSH_ERR_AGENT_FAILURE;
79 if (agent_present) 80 else if (type == SSH_AGENT_SUCCESS)
80 return 1;
81 if ((authfd = ssh_get_authentication_socket()) == -1)
82 return 0; 81 return 0;
83 else { 82 else
84 ssh_close_authentication_socket(authfd); 83 return SSH_ERR_INVALID_FORMAT;
85 return 1;
86 }
87} 84}
88 85
89/* Returns the number of the authentication fd, or -1 if there is none. */ 86/* Returns the number of the authentication fd, or -1 if there is none. */
90
91int 87int
92ssh_get_authentication_socket(void) 88ssh_get_authentication_socket(int *fdp)
93{ 89{
94 const char *authsocket; 90 const char *authsocket;
95 int sock; 91 int sock, oerrno;
96 struct sockaddr_un sunaddr; 92 struct sockaddr_un sunaddr;
97 93
94 if (fdp != NULL)
95 *fdp = -1;
96
98 authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME); 97 authsocket = getenv(SSH_AUTHSOCKET_ENV_NAME);
99 if (!authsocket) 98 if (!authsocket)
100 return -1; 99 return SSH_ERR_AGENT_NOT_PRESENT;
101 100
102 memset(&sunaddr, 0, sizeof(sunaddr)); 101 memset(&sunaddr, 0, sizeof(sunaddr));
103 sunaddr.sun_family = AF_UNIX; 102 sunaddr.sun_family = AF_UNIX;
104 strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path)); 103 strlcpy(sunaddr.sun_path, authsocket, sizeof(sunaddr.sun_path));
105 104
106 sock = socket(AF_UNIX, SOCK_STREAM, 0); 105 if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
107 if (sock < 0) 106 return SSH_ERR_SYSTEM_ERROR;
108 return -1;
109 107
110 /* close on exec */ 108 /* close on exec */
111 if (fcntl(sock, F_SETFD, FD_CLOEXEC) == -1) { 109 if (fcntl(sock, F_SETFD, FD_CLOEXEC) == -1 ||
110 connect(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) < 0) {
111 oerrno = errno;
112 close(sock); 112 close(sock);
113 return -1; 113 errno = oerrno;
114 return SSH_ERR_SYSTEM_ERROR;
114 } 115 }
115 if (connect(sock, (struct sockaddr *)&sunaddr, sizeof sunaddr) < 0) { 116 if (fdp != NULL)
117 *fdp = sock;
118 else
116 close(sock); 119 close(sock);
117 return -1; 120 return 0;
118 }
119 agent_present = 1;
120 return sock;
121} 121}
122 122
123/* Communicate with agent: send request and read reply */
123static int 124static int
124ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply) 125ssh_request_reply(int sock, struct sshbuf *request, struct sshbuf *reply)
125{ 126{
126 u_int l, len; 127 int r;
128 size_t l, len;
127 char buf[1024]; 129 char buf[1024];
128 130
129 /* Get the length of the message, and format it in the buffer. */ 131 /* Get the length of the message, and format it in the buffer. */
130 len = buffer_len(request); 132 len = sshbuf_len(request);
131 put_u32(buf, len); 133 put_u32(buf, len);
132 134
133 /* Send the length and then the packet to the agent. */ 135 /* Send the length and then the packet to the agent. */
134 if (atomicio(vwrite, auth->fd, buf, 4) != 4 || 136 if (atomicio(vwrite, sock, buf, 4) != 4 ||
135 atomicio(vwrite, auth->fd, buffer_ptr(request), 137 atomicio(vwrite, sock, (u_char *)sshbuf_ptr(request),
136 buffer_len(request)) != buffer_len(request)) { 138 sshbuf_len(request)) != sshbuf_len(request))
137 error("Error writing to authentication socket."); 139 return SSH_ERR_AGENT_COMMUNICATION;
138 return 0;
139 }
140 /* 140 /*
141 * Wait for response from the agent. First read the length of the 141 * Wait for response from the agent. First read the length of the
142 * response packet. 142 * response packet.
143 */ 143 */
144 if (atomicio(read, auth->fd, buf, 4) != 4) { 144 if (atomicio(read, sock, buf, 4) != 4)
145 error("Error reading response length from authentication socket."); 145 return SSH_ERR_AGENT_COMMUNICATION;
146 return 0;
147 }
148 146
149 /* Extract the length, and check it for sanity. */ 147 /* Extract the length, and check it for sanity. */
150 len = get_u32(buf); 148 len = get_u32(buf);
151 if (len > 256 * 1024) 149 if (len > MAX_AGENT_REPLY_LEN)
152 fatal("Authentication response too long: %u", len); 150 return SSH_ERR_INVALID_FORMAT;
153 151
154 /* Read the rest of the response in to the buffer. */ 152 /* Read the rest of the response in to the buffer. */
155 buffer_clear(reply); 153 sshbuf_reset(reply);
156 while (len > 0) { 154 while (len > 0) {
157 l = len; 155 l = len;
158 if (l > sizeof(buf)) 156 if (l > sizeof(buf))
159 l = sizeof(buf); 157 l = sizeof(buf);
160 if (atomicio(read, auth->fd, buf, l) != l) { 158 if (atomicio(read, sock, buf, l) != l)
161 error("Error reading response from authentication socket."); 159 return SSH_ERR_AGENT_COMMUNICATION;
162 return 0; 160 if ((r = sshbuf_put(reply, buf, l)) != 0)
163 } 161 return r;
164 buffer_append(reply, buf, l);
165 len -= l; 162 len -= l;
166 } 163 }
167 return 1; 164 return 0;
168} 165}
169 166
170/* 167/*
@@ -172,7 +169,6 @@ ssh_request_reply(AuthenticationConnection *auth, Buffer *request, Buffer *reply
172 * obtained). The argument must have been returned by 169 * obtained). The argument must have been returned by
173 * ssh_get_authentication_socket(). 170 * ssh_get_authentication_socket().
174 */ 171 */
175
176void 172void
177ssh_close_authentication_socket(int sock) 173ssh_close_authentication_socket(int sock)
178{ 174{
@@ -180,80 +176,103 @@ ssh_close_authentication_socket(int sock)
180 close(sock); 176 close(sock);
181} 177}
182 178
183/* 179/* Lock/unlock agent */
184 * Opens and connects a private socket for communication with the 180int
185 * authentication agent. Returns the file descriptor (which must be 181ssh_lock_agent(int sock, int lock, const char *password)
186 * shut down and closed by the caller when no longer needed).
187 * Returns NULL if an error occurred and the connection could not be
188 * opened.
189 */
190
191AuthenticationConnection *
192ssh_get_authentication_connection(void)
193{ 182{
194 AuthenticationConnection *auth; 183 int r;
195 int sock; 184 u_char type = lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK;
196 185 struct sshbuf *msg;
197 sock = ssh_get_authentication_socket(); 186
198 187 if ((msg = sshbuf_new()) == NULL)
199 /* 188 return SSH_ERR_ALLOC_FAIL;
200 * Fail if we couldn't obtain a connection. This happens if we 189 if ((r = sshbuf_put_u8(msg, type)) != 0 ||
201 * exited due to a timeout. 190 (r = sshbuf_put_cstring(msg, password)) != 0)
202 */ 191 goto out;
203 if (sock < 0) 192 if ((r = ssh_request_reply(sock, msg, msg)) != 0)
204 return NULL; 193 goto out;
205 194 if ((r = sshbuf_get_u8(msg, &type)) != 0)
206 auth = xcalloc(1, sizeof(*auth)); 195 goto out;
207 auth->fd = sock; 196 r = decode_reply(type);
208 buffer_init(&auth->identities); 197 out:
209 auth->howmany = 0; 198 sshbuf_free(msg);
210 199 return r;
211 return auth;
212} 200}
213 201
214/* 202#ifdef WITH_SSH1
215 * Closes the connection to the authentication agent and frees any associated 203static int
216 * memory. 204deserialise_identity1(struct sshbuf *ids, struct sshkey **keyp, char **commentp)
217 */
218
219void
220ssh_close_authentication_connection(AuthenticationConnection *auth)
221{ 205{
222 buffer_free(&auth->identities); 206 struct sshkey *key;
223 close(auth->fd); 207 int r, keybits;
224 free(auth); 208 u_int32_t bits;
209 char *comment = NULL;
210
211 if ((key = sshkey_new(KEY_RSA1)) == NULL)
212 return SSH_ERR_ALLOC_FAIL;
213 if ((r = sshbuf_get_u32(ids, &bits)) != 0 ||
214 (r = sshbuf_get_bignum1(ids, key->rsa->e)) != 0 ||
215 (r = sshbuf_get_bignum1(ids, key->rsa->n)) != 0 ||
216 (r = sshbuf_get_cstring(ids, &comment, NULL)) != 0)
217 goto out;
218 keybits = BN_num_bits(key->rsa->n);
219 /* XXX previously we just warned here. I think we should be strict */
220 if (keybits < 0 || bits != (u_int)keybits) {
221 r = SSH_ERR_KEY_BITS_MISMATCH;
222 goto out;
223 }
224 if (keyp != NULL) {
225 *keyp = key;
226 key = NULL;
227 }
228 if (commentp != NULL) {
229 *commentp = comment;
230 comment = NULL;
231 }
232 r = 0;
233 out:
234 sshkey_free(key);
235 free(comment);
236 return r;
225} 237}
238#endif
226 239
227/* Lock/unlock agent */ 240static int
228int 241deserialise_identity2(struct sshbuf *ids, struct sshkey **keyp, char **commentp)
229ssh_lock_agent(AuthenticationConnection *auth, int lock, const char *password)
230{ 242{
231 int type; 243 int r;
232 Buffer msg; 244 char *comment = NULL;
233 245 const u_char *blob;
234 buffer_init(&msg); 246 size_t blen;
235 buffer_put_char(&msg, lock ? SSH_AGENTC_LOCK : SSH_AGENTC_UNLOCK); 247
236 buffer_put_cstring(&msg, password); 248 if ((r = sshbuf_get_string_direct(ids, &blob, &blen)) != 0 ||
237 249 (r = sshbuf_get_cstring(ids, &comment, NULL)) != 0)
238 if (ssh_request_reply(auth, &msg, &msg) == 0) { 250 goto out;
239 buffer_free(&msg); 251 if ((r = sshkey_from_blob(blob, blen, keyp)) != 0)
240 return 0; 252 goto out;
253 if (commentp != NULL) {
254 *commentp = comment;
255 comment = NULL;
241 } 256 }
242 type = buffer_get_char(&msg); 257 r = 0;
243 buffer_free(&msg); 258 out:
244 return decode_reply(type); 259 free(comment);
260 return r;
245} 261}
246 262
247/* 263/*
248 * Returns the first authentication identity held by the agent. 264 * Fetch list of identities held by the agent.
249 */ 265 */
250
251int 266int
252ssh_get_num_identities(AuthenticationConnection *auth, int version) 267ssh_fetch_identitylist(int sock, int version, struct ssh_identitylist **idlp)
253{ 268{
254 int type, code1 = 0, code2 = 0; 269 u_char type, code1 = 0, code2 = 0;
255 Buffer request; 270 u_int32_t num, i;
271 struct sshbuf *msg;
272 struct ssh_identitylist *idl = NULL;
273 int r;
256 274
275 /* Determine request and expected response types */
257 switch (version) { 276 switch (version) {
258 case 1: 277 case 1:
259 code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES; 278 code1 = SSH_AGENTC_REQUEST_RSA_IDENTITIES;
@@ -264,238 +283,270 @@ ssh_get_num_identities(AuthenticationConnection *auth, int version)
264 code2 = SSH2_AGENT_IDENTITIES_ANSWER; 283 code2 = SSH2_AGENT_IDENTITIES_ANSWER;
265 break; 284 break;
266 default: 285 default:
267 return 0; 286 return SSH_ERR_INVALID_ARGUMENT;
268 } 287 }
269 288
270 /* 289 /*
271 * Send a message to the agent requesting for a list of the 290 * Send a message to the agent requesting for a list of the
272 * identities it can represent. 291 * identities it can represent.
273 */ 292 */
274 buffer_init(&request); 293 if ((msg = sshbuf_new()) == NULL)
275 buffer_put_char(&request, code1); 294 return SSH_ERR_ALLOC_FAIL;
295 if ((r = sshbuf_put_u8(msg, code1)) != 0)
296 goto out;
276 297
277 buffer_clear(&auth->identities); 298 if ((r = ssh_request_reply(sock, msg, msg)) != 0)
278 if (ssh_request_reply(auth, &request, &auth->identities) == 0) { 299 goto out;
279 buffer_free(&request);
280 return 0;
281 }
282 buffer_free(&request);
283 300
284 /* Get message type, and verify that we got a proper answer. */ 301 /* Get message type, and verify that we got a proper answer. */
285 type = buffer_get_char(&auth->identities); 302 if ((r = sshbuf_get_u8(msg, &type)) != 0)
303 goto out;
286 if (agent_failed(type)) { 304 if (agent_failed(type)) {
287 return 0; 305 r = SSH_ERR_AGENT_FAILURE;
306 goto out;
288 } else if (type != code2) { 307 } else if (type != code2) {
289 fatal("Bad authentication reply message type: %d", type); 308 r = SSH_ERR_INVALID_FORMAT;
309 goto out;
290 } 310 }
291 311
292 /* Get the number of entries in the response and check it for sanity. */ 312 /* Get the number of entries in the response and check it for sanity. */
293 auth->howmany = buffer_get_int(&auth->identities); 313 if ((r = sshbuf_get_u32(msg, &num)) != 0)
294 if ((u_int)auth->howmany > 1024) 314 goto out;
295 fatal("Too many identities in authentication reply: %d", 315 if (num > MAX_AGENT_IDENTITIES) {
296 auth->howmany); 316 r = SSH_ERR_INVALID_FORMAT;
297 317 goto out;
298 return auth->howmany; 318 }
299} 319 if (num == 0) {
300 320 r = SSH_ERR_AGENT_NO_IDENTITIES;
301Key * 321 goto out;
302ssh_get_first_identity(AuthenticationConnection *auth, char **comment, int version) 322 }
303{
304 /* get number of identities and return the first entry (if any). */
305 if (ssh_get_num_identities(auth, version) > 0)
306 return ssh_get_next_identity(auth, comment, version);
307 return NULL;
308}
309 323
310Key * 324 /* Deserialise the response into a list of keys/comments */
311ssh_get_next_identity(AuthenticationConnection *auth, char **comment, int version) 325 if ((idl = calloc(1, sizeof(*idl))) == NULL ||
312{ 326 (idl->keys = calloc(num, sizeof(*idl->keys))) == NULL ||
327 (idl->comments = calloc(num, sizeof(*idl->comments))) == NULL) {
328 r = SSH_ERR_ALLOC_FAIL;
329 goto out;
330 }
331 for (i = 0; i < num;) {
332 switch (version) {
333 case 1:
313#ifdef WITH_SSH1 334#ifdef WITH_SSH1
314 int keybits; 335 if ((r = deserialise_identity1(msg,
315 u_int bits; 336 &(idl->keys[i]), &(idl->comments[i]))) != 0)
337 goto out;
316#endif 338#endif
317 u_char *blob; 339 break;
318 u_int blen; 340 case 2:
319 Key *key = NULL; 341 if ((r = deserialise_identity2(msg,
320 342 &(idl->keys[i]), &(idl->comments[i]))) != 0) {
321 /* Return failure if no more entries. */ 343 if (r == SSH_ERR_KEY_TYPE_UNKNOWN) {
322 if (auth->howmany <= 0) 344 /* Gracefully skip unknown key types */
323 return NULL; 345 num--;
346 continue;
347 } else
348 goto out;
349 }
350 break;
351 }
352 i++;
353 }
354 idl->nkeys = num;
355 *idlp = idl;
356 idl = NULL;
357 r = 0;
358 out:
359 sshbuf_free(msg);
360 if (idl != NULL)
361 ssh_free_identitylist(idl);
362 return r;
363}
324 364
325 /* 365void
326 * Get the next entry from the packet. These will abort with a fatal 366ssh_free_identitylist(struct ssh_identitylist *idl)
327 * error if the packet is too short or contains corrupt data. 367{
328 */ 368 size_t i;
329 switch (version) { 369
330#ifdef WITH_SSH1 370 if (idl == NULL)
331 case 1: 371 return;
332 key = key_new(KEY_RSA1); 372 for (i = 0; i < idl->nkeys; i++) {
333 bits = buffer_get_int(&auth->identities); 373 if (idl->keys != NULL)
334 buffer_get_bignum(&auth->identities, key->rsa->e); 374 sshkey_free(idl->keys[i]);
335 buffer_get_bignum(&auth->identities, key->rsa->n); 375 if (idl->comments != NULL)
336 *comment = buffer_get_string(&auth->identities, NULL); 376 free(idl->comments[i]);
337 keybits = BN_num_bits(key->rsa->n);
338 if (keybits < 0 || bits != (u_int)keybits)
339 logit("Warning: identity keysize mismatch: actual %d, announced %u",
340 BN_num_bits(key->rsa->n), bits);
341 break;
342#endif
343 case 2:
344 blob = buffer_get_string(&auth->identities, &blen);
345 *comment = buffer_get_string(&auth->identities, NULL);
346 key = key_from_blob(blob, blen);
347 free(blob);
348 break;
349 default:
350 return NULL;
351 } 377 }
352 /* Decrement the number of remaining entries. */ 378 free(idl);
353 auth->howmany--;
354 return key;
355} 379}
356 380
357/* 381/*
358 * Generates a random challenge, sends it to the agent, and waits for 382 * Sends a challenge (typically from a server via ssh(1)) to the agent,
359 * response from the agent. Returns true (non-zero) if the agent gave the 383 * and waits for a response from the agent.
360 * correct answer, zero otherwise. Response type selects the style of 384 * Returns true (non-zero) if the agent gave the correct answer, zero
361 * response desired, with 0 corresponding to protocol version 1.0 (no longer 385 * otherwise.
362 * supported) and 1 corresponding to protocol version 1.1.
363 */ 386 */
364 387
365#ifdef WITH_SSH1 388#ifdef WITH_SSH1
366int 389int
367ssh_decrypt_challenge(AuthenticationConnection *auth, 390ssh_decrypt_challenge(int sock, struct sshkey* key, BIGNUM *challenge,
368 Key* key, BIGNUM *challenge, 391 u_char session_id[16], u_char response[16])
369 u_char session_id[16],
370 u_int response_type,
371 u_char response[16])
372{ 392{
373 Buffer buffer; 393 struct sshbuf *msg;
374 int success = 0; 394 int r;
375 int i; 395 u_char type;
376 int type;
377 396
378 if (key->type != KEY_RSA1) 397 if (key->type != KEY_RSA1)
379 return 0; 398 return SSH_ERR_INVALID_ARGUMENT;
380 if (response_type == 0) { 399 if ((msg = sshbuf_new()) == NULL)
381 logit("Compatibility with ssh protocol version 1.0 no longer supported."); 400 return SSH_ERR_ALLOC_FAIL;
382 return 0; 401 if ((r = sshbuf_put_u8(msg, SSH_AGENTC_RSA_CHALLENGE)) != 0 ||
383 } 402 (r = sshbuf_put_u32(msg, BN_num_bits(key->rsa->n))) != 0 ||
384 buffer_init(&buffer); 403 (r = sshbuf_put_bignum1(msg, key->rsa->e)) != 0 ||
385 buffer_put_char(&buffer, SSH_AGENTC_RSA_CHALLENGE); 404 (r = sshbuf_put_bignum1(msg, key->rsa->n)) != 0 ||
386 buffer_put_int(&buffer, BN_num_bits(key->rsa->n)); 405 (r = sshbuf_put_bignum1(msg, challenge)) != 0 ||
387 buffer_put_bignum(&buffer, key->rsa->e); 406 (r = sshbuf_put(msg, session_id, 16)) != 0 ||
388 buffer_put_bignum(&buffer, key->rsa->n); 407 (r = sshbuf_put_u32(msg, 1)) != 0) /* Response type for proto 1.1 */
389 buffer_put_bignum(&buffer, challenge); 408 goto out;
390 buffer_append(&buffer, session_id, 16); 409 if ((r = ssh_request_reply(sock, msg, msg)) != 0)
391 buffer_put_int(&buffer, response_type); 410 goto out;
392 411 if ((r = sshbuf_get_u8(msg, &type)) != 0)
393 if (ssh_request_reply(auth, &buffer, &buffer) == 0) { 412 goto out;
394 buffer_free(&buffer);
395 return 0;
396 }
397 type = buffer_get_char(&buffer);
398
399 if (agent_failed(type)) { 413 if (agent_failed(type)) {
400 logit("Agent admitted failure to authenticate using the key."); 414 r = SSH_ERR_AGENT_FAILURE;
415 goto out;
401 } else if (type != SSH_AGENT_RSA_RESPONSE) { 416 } else if (type != SSH_AGENT_RSA_RESPONSE) {
402 fatal("Bad authentication response: %d", type); 417 r = SSH_ERR_INVALID_FORMAT;
403 } else { 418 goto out;
404 success = 1;
405 /*
406 * Get the response from the packet. This will abort with a
407 * fatal error if the packet is corrupt.
408 */
409 for (i = 0; i < 16; i++)
410 response[i] = (u_char)buffer_get_char(&buffer);
411 } 419 }
412 buffer_free(&buffer); 420 if ((r = sshbuf_get(msg, response, 16)) != 0)
413 return success; 421 goto out;
422 r = 0;
423 out:
424 sshbuf_free(msg);
425 return r;
414} 426}
415#endif 427#endif
416 428
417/* ask agent to sign data, returns -1 on error, 0 on success */ 429/* ask agent to sign data, returns err.h code on error, 0 on success */
418int 430int
419ssh_agent_sign(AuthenticationConnection *auth, 431ssh_agent_sign(int sock, struct sshkey *key,
420 Key *key, 432 u_char **sigp, size_t *lenp,
421 u_char **sigp, u_int *lenp, 433 const u_char *data, size_t datalen, u_int compat)
422 u_char *data, u_int datalen)
423{ 434{
424 extern int datafellows; 435 struct sshbuf *msg;
425 Buffer msg; 436 u_char *blob = NULL, type;
426 u_char *blob; 437 size_t blen = 0, len = 0;
427 u_int blen; 438 u_int flags = 0;
428 int type, flags = 0; 439 int r = SSH_ERR_INTERNAL_ERROR;
429 int ret = -1; 440
430 441 if (sigp != NULL)
431 if (key_to_blob(key, &blob, &blen) == 0) 442 *sigp = NULL;
432 return -1; 443 if (lenp != NULL)
433 444 *lenp = 0;
434 if (datafellows & SSH_BUG_SIGBLOB) 445
435 flags = SSH_AGENT_OLD_SIGNATURE; 446 if (datalen > SSH_KEY_MAX_SIGN_DATA_SIZE)
436 447 return SSH_ERR_INVALID_ARGUMENT;
437 buffer_init(&msg); 448 if (compat & SSH_BUG_SIGBLOB)
438 buffer_put_char(&msg, SSH2_AGENTC_SIGN_REQUEST); 449 flags |= SSH_AGENT_OLD_SIGNATURE;
439 buffer_put_string(&msg, blob, blen); 450 if ((msg = sshbuf_new()) == NULL)
440 buffer_put_string(&msg, data, datalen); 451 return SSH_ERR_ALLOC_FAIL;
441 buffer_put_int(&msg, flags); 452 if ((r = sshkey_to_blob(key, &blob, &blen)) != 0)
442 free(blob); 453 goto out;
443 454 if ((r = sshbuf_put_u8(msg, SSH2_AGENTC_SIGN_REQUEST)) != 0 ||
444 if (ssh_request_reply(auth, &msg, &msg) == 0) { 455 (r = sshbuf_put_string(msg, blob, blen)) != 0 ||
445 buffer_free(&msg); 456 (r = sshbuf_put_string(msg, data, datalen)) != 0 ||
446 return -1; 457 (r = sshbuf_put_u32(msg, flags)) != 0)
447 } 458 goto out;
448 type = buffer_get_char(&msg); 459 if ((r = ssh_request_reply(sock, msg, msg) != 0))
460 goto out;
461 if ((r = sshbuf_get_u8(msg, &type)) != 0)
462 goto out;
449 if (agent_failed(type)) { 463 if (agent_failed(type)) {
450 logit("Agent admitted failure to sign using the key."); 464 r = SSH_ERR_AGENT_FAILURE;
465 goto out;
451 } else if (type != SSH2_AGENT_SIGN_RESPONSE) { 466 } else if (type != SSH2_AGENT_SIGN_RESPONSE) {
452 fatal("Bad authentication response: %d", type); 467 r = SSH_ERR_INVALID_FORMAT;
453 } else { 468 goto out;
454 ret = 0; 469 }
455 *sigp = buffer_get_string(&msg, lenp); 470 if ((r = sshbuf_get_string(msg, sigp, &len)) != 0)
471 goto out;
472 *lenp = len;
473 r = 0;
474 out:
475 if (blob != NULL) {
476 explicit_bzero(blob, blen);
477 free(blob);
456 } 478 }
457 buffer_free(&msg); 479 sshbuf_free(msg);
458 return ret; 480 return r;
459} 481}
460 482
461/* Encode key for a message to the agent. */ 483/* Encode key for a message to the agent. */
462 484
463#ifdef WITH_SSH1 485#ifdef WITH_SSH1
464static void 486static int
465ssh_encode_identity_rsa1(Buffer *b, RSA *key, const char *comment) 487ssh_encode_identity_rsa1(struct sshbuf *b, RSA *key, const char *comment)
466{ 488{
467 buffer_put_int(b, BN_num_bits(key->n)); 489 int r;
468 buffer_put_bignum(b, key->n); 490
469 buffer_put_bignum(b, key->e);
470 buffer_put_bignum(b, key->d);
471 /* To keep within the protocol: p < q for ssh. in SSL p > q */ 491 /* To keep within the protocol: p < q for ssh. in SSL p > q */
472 buffer_put_bignum(b, key->iqmp); /* ssh key->u */ 492 if ((r = sshbuf_put_u32(b, BN_num_bits(key->n))) != 0 ||
473 buffer_put_bignum(b, key->q); /* ssh key->p, SSL key->q */ 493 (r = sshbuf_put_bignum1(b, key->n)) != 0 ||
474 buffer_put_bignum(b, key->p); /* ssh key->q, SSL key->p */ 494 (r = sshbuf_put_bignum1(b, key->e)) != 0 ||
475 buffer_put_cstring(b, comment); 495 (r = sshbuf_put_bignum1(b, key->d)) != 0 ||
496 (r = sshbuf_put_bignum1(b, key->iqmp)) != 0 ||
497 (r = sshbuf_put_bignum1(b, key->q)) != 0 ||
498 (r = sshbuf_put_bignum1(b, key->p)) != 0 ||
499 (r = sshbuf_put_cstring(b, comment)) != 0)
500 return r;
501 return 0;
476} 502}
477#endif 503#endif
478 504
479static void 505static int
480ssh_encode_identity_ssh2(Buffer *b, Key *key, const char *comment) 506ssh_encode_identity_ssh2(struct sshbuf *b, struct sshkey *key,
507 const char *comment)
508{
509 int r;
510
511 if ((r = sshkey_private_serialize(key, b)) != 0 ||
512 (r = sshbuf_put_cstring(b, comment)) != 0)
513 return r;
514 return 0;
515}
516
517static int
518encode_constraints(struct sshbuf *m, u_int life, u_int confirm)
481{ 519{
482 key_private_serialize(key, b); 520 int r;
483 buffer_put_cstring(b, comment); 521
522 if (life != 0) {
523 if ((r = sshbuf_put_u8(m, SSH_AGENT_CONSTRAIN_LIFETIME)) != 0 ||
524 (r = sshbuf_put_u32(m, life)) != 0)
525 goto out;
526 }
527 if (confirm != 0) {
528 if ((r = sshbuf_put_u8(m, SSH_AGENT_CONSTRAIN_CONFIRM)) != 0)
529 goto out;
530 }
531 r = 0;
532 out:
533 return r;
484} 534}
485 535
486/* 536/*
487 * Adds an identity to the authentication server. This call is not meant to 537 * Adds an identity to the authentication server.
488 * be used by normal applications. 538 * This call is intended only for use by ssh-add(1) and like applications.
489 */ 539 */
490
491int 540int
492ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key, 541ssh_add_identity_constrained(int sock, struct sshkey *key, const char *comment,
493 const char *comment, u_int life, u_int confirm) 542 u_int life, u_int confirm)
494{ 543{
495 Buffer msg; 544 struct sshbuf *msg;
496 int type, constrained = (life || confirm); 545 int r, constrained = (life || confirm);
546 u_char type;
497 547
498 buffer_init(&msg); 548 if ((msg = sshbuf_new()) == NULL)
549 return SSH_ERR_ALLOC_FAIL;
499 550
500 switch (key->type) { 551 switch (key->type) {
501#ifdef WITH_SSH1 552#ifdef WITH_SSH1
@@ -503,8 +554,9 @@ ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
503 type = constrained ? 554 type = constrained ?
504 SSH_AGENTC_ADD_RSA_ID_CONSTRAINED : 555 SSH_AGENTC_ADD_RSA_ID_CONSTRAINED :
505 SSH_AGENTC_ADD_RSA_IDENTITY; 556 SSH_AGENTC_ADD_RSA_IDENTITY;
506 buffer_put_char(&msg, type); 557 if ((r = sshbuf_put_u8(msg, type)) != 0 ||
507 ssh_encode_identity_rsa1(&msg, key->rsa, comment); 558 (r = ssh_encode_identity_rsa1(msg, key->rsa, comment)) != 0)
559 goto out;
508 break; 560 break;
509#endif 561#endif
510#ifdef WITH_OPENSSL 562#ifdef WITH_OPENSSL
@@ -522,77 +574,88 @@ ssh_add_identity_constrained(AuthenticationConnection *auth, Key *key,
522 type = constrained ? 574 type = constrained ?
523 SSH2_AGENTC_ADD_ID_CONSTRAINED : 575 SSH2_AGENTC_ADD_ID_CONSTRAINED :
524 SSH2_AGENTC_ADD_IDENTITY; 576 SSH2_AGENTC_ADD_IDENTITY;
525 buffer_put_char(&msg, type); 577 if ((r = sshbuf_put_u8(msg, type)) != 0 ||
526 ssh_encode_identity_ssh2(&msg, key, comment); 578 (r = ssh_encode_identity_ssh2(msg, key, comment)) != 0)
579 goto out;
527 break; 580 break;
528 default: 581 default:
529 buffer_free(&msg); 582 r = SSH_ERR_INVALID_ARGUMENT;
530 return 0; 583 goto out;
531 }
532 if (constrained) {
533 if (life != 0) {
534 buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME);
535 buffer_put_int(&msg, life);
536 }
537 if (confirm != 0)
538 buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM);
539 } 584 }
540 if (ssh_request_reply(auth, &msg, &msg) == 0) { 585 if (constrained &&
541 buffer_free(&msg); 586 (r = encode_constraints(msg, life, confirm)) != 0)
542 return 0; 587 goto out;
543 } 588 if ((r = ssh_request_reply(sock, msg, msg)) != 0)
544 type = buffer_get_char(&msg); 589 goto out;
545 buffer_free(&msg); 590 if ((r = sshbuf_get_u8(msg, &type)) != 0)
546 return decode_reply(type); 591 goto out;
592 r = decode_reply(type);
593 out:
594 sshbuf_free(msg);
595 return r;
547} 596}
548 597
549/* 598/*
550 * Removes an identity from the authentication server. This call is not 599 * Removes an identity from the authentication server.
551 * meant to be used by normal applications. 600 * This call is intended only for use by ssh-add(1) and like applications.
552 */ 601 */
553
554int 602int
555ssh_remove_identity(AuthenticationConnection *auth, Key *key) 603ssh_remove_identity(int sock, struct sshkey *key)
556{ 604{
557 Buffer msg; 605 struct sshbuf *msg;
558 int type; 606 int r;
559 u_char *blob; 607 u_char type, *blob = NULL;
560 u_int blen; 608 size_t blen;
561 609
562 buffer_init(&msg); 610 if ((msg = sshbuf_new()) == NULL)
611 return SSH_ERR_ALLOC_FAIL;
563 612
564#ifdef WITH_SSH1 613#ifdef WITH_SSH1
565 if (key->type == KEY_RSA1) { 614 if (key->type == KEY_RSA1) {
566 buffer_put_char(&msg, SSH_AGENTC_REMOVE_RSA_IDENTITY); 615 if ((r = sshbuf_put_u8(msg,
567 buffer_put_int(&msg, BN_num_bits(key->rsa->n)); 616 SSH_AGENTC_REMOVE_RSA_IDENTITY)) != 0 ||
568 buffer_put_bignum(&msg, key->rsa->e); 617 (r = sshbuf_put_u32(msg, BN_num_bits(key->rsa->n))) != 0 ||
569 buffer_put_bignum(&msg, key->rsa->n); 618 (r = sshbuf_put_bignum1(msg, key->rsa->e)) != 0 ||
619 (r = sshbuf_put_bignum1(msg, key->rsa->n)) != 0)
620 goto out;
570 } else 621 } else
571#endif 622#endif
572 if (key->type != KEY_UNSPEC) { 623 if (key->type != KEY_UNSPEC) {
573 key_to_blob(key, &blob, &blen); 624 if ((r = sshkey_to_blob(key, &blob, &blen)) != 0)
574 buffer_put_char(&msg, SSH2_AGENTC_REMOVE_IDENTITY); 625 goto out;
575 buffer_put_string(&msg, blob, blen); 626 if ((r = sshbuf_put_u8(msg,
576 free(blob); 627 SSH2_AGENTC_REMOVE_IDENTITY)) != 0 ||
628 (r = sshbuf_put_string(msg, blob, blen)) != 0)
629 goto out;
577 } else { 630 } else {
578 buffer_free(&msg); 631 r = SSH_ERR_INVALID_ARGUMENT;
579 return 0; 632 goto out;
580 } 633 }
581 if (ssh_request_reply(auth, &msg, &msg) == 0) { 634 if ((r = ssh_request_reply(sock, msg, msg)) != 0)
582 buffer_free(&msg); 635 goto out;
583 return 0; 636 if ((r = sshbuf_get_u8(msg, &type)) != 0)
637 goto out;
638 r = decode_reply(type);
639 out:
640 if (blob != NULL) {
641 explicit_bzero(blob, blen);
642 free(blob);
584 } 643 }
585 type = buffer_get_char(&msg); 644 sshbuf_free(msg);
586 buffer_free(&msg); 645 return r;
587 return decode_reply(type);
588} 646}
589 647
648/*
649 * Add/remove an token-based identity from the authentication server.
650 * This call is intended only for use by ssh-add(1) and like applications.
651 */
590int 652int
591ssh_update_card(AuthenticationConnection *auth, int add, 653ssh_update_card(int sock, int add, const char *reader_id, const char *pin,
592 const char *reader_id, const char *pin, u_int life, u_int confirm) 654 u_int life, u_int confirm)
593{ 655{
594 Buffer msg; 656 struct sshbuf *msg;
595 int type, constrained = (life || confirm); 657 int r, constrained = (life || confirm);
658 u_char type;
596 659
597 if (add) { 660 if (add) {
598 type = constrained ? 661 type = constrained ?
@@ -601,69 +664,48 @@ ssh_update_card(AuthenticationConnection *auth, int add,
601 } else 664 } else
602 type = SSH_AGENTC_REMOVE_SMARTCARD_KEY; 665 type = SSH_AGENTC_REMOVE_SMARTCARD_KEY;
603 666
604 buffer_init(&msg); 667 if ((msg = sshbuf_new()) == NULL)
605 buffer_put_char(&msg, type); 668 return SSH_ERR_ALLOC_FAIL;
606 buffer_put_cstring(&msg, reader_id); 669 if ((r = sshbuf_put_u8(msg, type)) != 0 ||
607 buffer_put_cstring(&msg, pin); 670 (r = sshbuf_put_cstring(msg, reader_id)) != 0 ||
608 671 (r = sshbuf_put_cstring(msg, pin)) != 0)
609 if (constrained) { 672 goto out;
610 if (life != 0) { 673 if (constrained &&
611 buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_LIFETIME); 674 (r = encode_constraints(msg, life, confirm)) != 0)
612 buffer_put_int(&msg, life); 675 goto out;
613 } 676 if ((r = ssh_request_reply(sock, msg, msg)) != 0)
614 if (confirm != 0) 677 goto out;
615 buffer_put_char(&msg, SSH_AGENT_CONSTRAIN_CONFIRM); 678 if ((r = sshbuf_get_u8(msg, &type)) != 0)
616 } 679 goto out;
617 680 r = decode_reply(type);
618 if (ssh_request_reply(auth, &msg, &msg) == 0) { 681 out:
619 buffer_free(&msg); 682 sshbuf_free(msg);
620 return 0; 683 return r;
621 }
622 type = buffer_get_char(&msg);
623 buffer_free(&msg);
624 return decode_reply(type);
625} 684}
626 685
627/* 686/*
628 * Removes all identities from the agent. This call is not meant to be used 687 * Removes all identities from the agent.
629 * by normal applications. 688 * This call is intended only for use by ssh-add(1) and like applications.
630 */ 689 */
631
632int
633ssh_remove_all_identities(AuthenticationConnection *auth, int version)
634{
635 Buffer msg;
636 int type;
637 int code = (version==1) ?
638 SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
639 SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
640
641 buffer_init(&msg);
642 buffer_put_char(&msg, code);
643
644 if (ssh_request_reply(auth, &msg, &msg) == 0) {
645 buffer_free(&msg);
646 return 0;
647 }
648 type = buffer_get_char(&msg);
649 buffer_free(&msg);
650 return decode_reply(type);
651}
652
653int 690int
654decode_reply(int type) 691ssh_remove_all_identities(int sock, int version)
655{ 692{
656 switch (type) { 693 struct sshbuf *msg;
657 case SSH_AGENT_FAILURE: 694 u_char type = (version == 1) ?
658 case SSH_COM_AGENT2_FAILURE: 695 SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES :
659 case SSH2_AGENT_FAILURE: 696 SSH2_AGENTC_REMOVE_ALL_IDENTITIES;
660 logit("SSH_AGENT_FAILURE"); 697 int r;
661 return 0; 698
662 case SSH_AGENT_SUCCESS: 699 if ((msg = sshbuf_new()) == NULL)
663 return 1; 700 return SSH_ERR_ALLOC_FAIL;
664 default: 701 if ((r = sshbuf_put_u8(msg, type)) != 0)
665 fatal("Bad response from authentication agent: %d", type); 702 goto out;
666 } 703 if ((r = ssh_request_reply(sock, msg, msg)) != 0)
667 /* NOTREACHED */ 704 goto out;
668 return 0; 705 if ((r = sshbuf_get_u8(msg, &type)) != 0)
706 goto out;
707 r = decode_reply(type);
708 out:
709 sshbuf_free(msg);
710 return r;
669} 711}
diff --git a/authfd.h b/authfd.h
index 2582a27aa..bea20c26b 100644
--- a/authfd.h
+++ b/authfd.h
@@ -1,4 +1,4 @@
1/* $OpenBSD: authfd.h,v 1.37 2009/08/27 17:44:52 djm Exp $ */ 1/* $OpenBSD: authfd.h,v 1.38 2015/01/14 20:05:27 djm Exp $ */
2 2
3/* 3/*
4 * Author: Tatu Ylonen <ylo@cs.hut.fi> 4 * Author: Tatu Ylonen <ylo@cs.hut.fi>
@@ -16,6 +16,33 @@
16#ifndef AUTHFD_H 16#ifndef AUTHFD_H
17#define AUTHFD_H 17#define AUTHFD_H
18 18
19/* List of identities returned by ssh_fetch_identitylist() */
20struct ssh_identitylist {
21 size_t nkeys;
22 struct sshkey **keys;
23 char **comments;
24};
25
26int ssh_get_authentication_socket(int *fdp);
27void ssh_close_authentication_socket(int sock);
28
29int ssh_lock_agent(int sock, int lock, const char *password);
30int ssh_fetch_identitylist(int sock, int version,
31 struct ssh_identitylist **idlp);
32void ssh_free_identitylist(struct ssh_identitylist *idl);
33int ssh_add_identity_constrained(int sock, struct sshkey *key,
34 const char *comment, u_int life, u_int confirm);
35int ssh_remove_identity(int sock, struct sshkey *key);
36int ssh_update_card(int sock, int add, const char *reader_id,
37 const char *pin, u_int life, u_int confirm);
38int ssh_remove_all_identities(int sock, int version);
39
40int ssh_decrypt_challenge(int sock, struct sshkey* key, BIGNUM *challenge,
41 u_char session_id[16], u_char response[16]);
42int ssh_agent_sign(int sock, struct sshkey *key,
43 u_char **sigp, size_t *lenp,
44 const u_char *data, size_t datalen, u_int compat);
45
19/* Messages for the authentication agent connection. */ 46/* Messages for the authentication agent connection. */
20#define SSH_AGENTC_REQUEST_RSA_IDENTITIES 1 47#define SSH_AGENTC_REQUEST_RSA_IDENTITIES 1
21#define SSH_AGENT_RSA_IDENTITIES_ANSWER 2 48#define SSH_AGENT_RSA_IDENTITIES_ANSWER 2
@@ -60,35 +87,4 @@
60 87
61#define SSH_AGENT_OLD_SIGNATURE 0x01 88#define SSH_AGENT_OLD_SIGNATURE 0x01
62 89
63typedef struct {
64 int fd;
65 Buffer identities;
66 int howmany;
67} AuthenticationConnection;
68
69int ssh_agent_present(void);
70int ssh_get_authentication_socket(void);
71void ssh_close_authentication_socket(int);
72
73AuthenticationConnection *ssh_get_authentication_connection(void);
74void ssh_close_authentication_connection(AuthenticationConnection *);
75int ssh_get_num_identities(AuthenticationConnection *, int);
76Key *ssh_get_first_identity(AuthenticationConnection *, char **, int);
77Key *ssh_get_next_identity(AuthenticationConnection *, char **, int);
78int ssh_add_identity_constrained(AuthenticationConnection *, Key *,
79 const char *, u_int, u_int);
80int ssh_remove_identity(AuthenticationConnection *, Key *);
81int ssh_remove_all_identities(AuthenticationConnection *, int);
82int ssh_lock_agent(AuthenticationConnection *, int, const char *);
83int ssh_update_card(AuthenticationConnection *, int, const char *,
84 const char *, u_int, u_int);
85
86int
87ssh_decrypt_challenge(AuthenticationConnection *, Key *, BIGNUM *, u_char[16],
88 u_int, u_char[16]);
89
90int
91ssh_agent_sign(AuthenticationConnection *, Key *, u_char **, u_int *, u_char *,
92 u_int);
93
94#endif /* AUTHFD_H */ 90#endif /* AUTHFD_H */
diff --git a/clientloop.c b/clientloop.c
index 397c96532..2137a81ce 100644
--- a/clientloop.c
+++ b/clientloop.c
@@ -1,4 +1,4 @@
1/* $OpenBSD: clientloop.c,v 1.261 2014/07/15 15:54:14 millert Exp $ */ 1/* $OpenBSD: clientloop.c,v 1.262 2015/01/14 20:05:27 djm Exp $ */
2/* 2/*
3 * Author: Tatu Ylonen <ylo@cs.hut.fi> 3 * Author: Tatu Ylonen <ylo@cs.hut.fi>
4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -110,6 +110,7 @@
110#include "match.h" 110#include "match.h"
111#include "msg.h" 111#include "msg.h"
112#include "roaming.h" 112#include "roaming.h"
113#include "ssherr.h"
113 114
114/* import options */ 115/* import options */
115extern Options options; 116extern Options options;
@@ -1782,7 +1783,7 @@ static void
1782client_input_agent_open(int type, u_int32_t seq, void *ctxt) 1783client_input_agent_open(int type, u_int32_t seq, void *ctxt)
1783{ 1784{
1784 Channel *c = NULL; 1785 Channel *c = NULL;
1785 int remote_id, sock; 1786 int r, remote_id, sock;
1786 1787
1787 /* Read the remote channel number from the message. */ 1788 /* Read the remote channel number from the message. */
1788 remote_id = packet_get_int(); 1789 remote_id = packet_get_int();
@@ -1792,7 +1793,11 @@ client_input_agent_open(int type, u_int32_t seq, void *ctxt)
1792 * Get a connection to the local authentication agent (this may again 1793 * Get a connection to the local authentication agent (this may again
1793 * get forwarded). 1794 * get forwarded).
1794 */ 1795 */
1795 sock = ssh_get_authentication_socket(); 1796 if ((r = ssh_get_authentication_socket(&sock)) != 0 &&
1797 r != SSH_ERR_AGENT_NOT_PRESENT)
1798 debug("%s: ssh_get_authentication_socket: %s",
1799 __func__, ssh_err(r));
1800
1796 1801
1797 /* 1802 /*
1798 * If we could not connect the agent, send an error message back to 1803 * If we could not connect the agent, send an error message back to
@@ -1910,7 +1915,7 @@ static Channel *
1910client_request_agent(const char *request_type, int rchan) 1915client_request_agent(const char *request_type, int rchan)
1911{ 1916{
1912 Channel *c = NULL; 1917 Channel *c = NULL;
1913 int sock; 1918 int r, sock;
1914 1919
1915 if (!options.forward_agent) { 1920 if (!options.forward_agent) {
1916 error("Warning: ssh server tried agent forwarding."); 1921 error("Warning: ssh server tried agent forwarding.");
@@ -1918,9 +1923,12 @@ client_request_agent(const char *request_type, int rchan)
1918 "malicious server."); 1923 "malicious server.");
1919 return NULL; 1924 return NULL;
1920 } 1925 }
1921 sock = ssh_get_authentication_socket(); 1926 if ((r = ssh_get_authentication_socket(&sock)) != 0) {
1922 if (sock < 0) 1927 if (r != SSH_ERR_AGENT_NOT_PRESENT)
1928 debug("%s: ssh_get_authentication_socket: %s",
1929 __func__, ssh_err(r));
1923 return NULL; 1930 return NULL;
1931 }
1924 c = channel_new("authentication agent connection", 1932 c = channel_new("authentication agent connection",
1925 SSH_CHANNEL_OPEN, sock, sock, -1, 1933 SSH_CHANNEL_OPEN, sock, sock, -1,
1926 CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0, 1934 CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_PACKET_DEFAULT, 0,
diff --git a/monitor.c b/monitor.c
index 5a28d1b34..6858478ca 100644
--- a/monitor.c
+++ b/monitor.c
@@ -1,4 +1,4 @@
1/* $OpenBSD: monitor.c,v 1.137 2015/01/13 07:39:19 djm Exp $ */ 1/* $OpenBSD: monitor.c,v 1.138 2015/01/14 20:05:27 djm Exp $ */
2/* 2/*
3 * Copyright 2002 Niels Provos <provos@citi.umich.edu> 3 * Copyright 2002 Niels Provos <provos@citi.umich.edu>
4 * Copyright 2002 Markus Friedl <markus@openbsd.org> 4 * Copyright 2002 Markus Friedl <markus@openbsd.org>
@@ -101,6 +101,7 @@
101#include "roaming.h" 101#include "roaming.h"
102#include "authfd.h" 102#include "authfd.h"
103#include "match.h" 103#include "match.h"
104#include "ssherr.h"
104 105
105#ifdef GSSAPI 106#ifdef GSSAPI
106static Gssctxt *gsscontext = NULL; 107static Gssctxt *gsscontext = NULL;
@@ -685,28 +686,28 @@ mm_answer_moduli(int sock, Buffer *m)
685} 686}
686#endif 687#endif
687 688
688extern AuthenticationConnection *auth_conn;
689
690int 689int
691mm_answer_sign(int sock, Buffer *m) 690mm_answer_sign(int sock, Buffer *m)
692{ 691{
693 Key *key; 692 extern int auth_sock; /* XXX move to state struct? */
693 struct sshkey *key;
694 u_char *p; 694 u_char *p;
695 u_char *signature; 695 u_char *signature;
696 u_int siglen, datlen; 696 size_t datlen, siglen;
697 int keyid; 697 int r, keyid;
698 698
699 debug3("%s", __func__); 699 debug3("%s", __func__);
700 700
701 keyid = buffer_get_int(m); 701 if ((r = sshbuf_get_u32(m, &keyid)) != 0 ||
702 p = buffer_get_string(m, &datlen); 702 (r = sshbuf_get_string(m, &p, &datlen)) != 0)
703 fatal("%s: buffer error: %s", __func__, ssh_err(r));
703 704
704 /* 705 /*
705 * Supported KEX types use SHA1 (20 bytes), SHA256 (32 bytes), 706 * Supported KEX types use SHA1 (20 bytes), SHA256 (32 bytes),
706 * SHA384 (48 bytes) and SHA512 (64 bytes). 707 * SHA384 (48 bytes) and SHA512 (64 bytes).
707 */ 708 */
708 if (datlen != 20 && datlen != 32 && datlen != 48 && datlen != 64) 709 if (datlen != 20 && datlen != 32 && datlen != 48 && datlen != 64)
709 fatal("%s: data length incorrect: %u", __func__, datlen); 710 fatal("%s: data length incorrect: %zu", __func__, datlen);
710 711
711 /* save session id, it will be passed on the first call */ 712 /* save session id, it will be passed on the first call */
712 if (session_id2_len == 0) { 713 if (session_id2_len == 0) {
@@ -716,20 +717,25 @@ mm_answer_sign(int sock, Buffer *m)
716 } 717 }
717 718
718 if ((key = get_hostkey_by_index(keyid)) != NULL) { 719 if ((key = get_hostkey_by_index(keyid)) != NULL) {
719 if (key_sign(key, &signature, &siglen, p, datlen) < 0) 720 if ((r = sshkey_sign(key, &signature, &siglen, p, datlen,
720 fatal("%s: key_sign failed", __func__); 721 datafellows)) != 0)
722 fatal("%s: sshkey_sign failed: %s",
723 __func__, ssh_err(r));
721 } else if ((key = get_hostkey_public_by_index(keyid)) != NULL && 724 } else if ((key = get_hostkey_public_by_index(keyid)) != NULL &&
722 auth_conn != NULL) { 725 auth_sock > 0) {
723 if (ssh_agent_sign(auth_conn, key, &signature, &siglen, p, 726 if ((r = ssh_agent_sign(auth_sock, key, &signature, &siglen,
724 datlen) < 0) 727 p, datlen, datafellows)) != 0) {
725 fatal("%s: ssh_agent_sign failed", __func__); 728 fatal("%s: ssh_agent_sign failed: %s",
729 __func__, ssh_err(r));
730 }
726 } else 731 } else
727 fatal("%s: no hostkey from index %d", __func__, keyid); 732 fatal("%s: no hostkey from index %d", __func__, keyid);
728 733
729 debug3("%s: signature %p(%u)", __func__, signature, siglen); 734 debug3("%s: signature %p(%zu)", __func__, signature, siglen);
730 735
731 buffer_clear(m); 736 sshbuf_reset(m);
732 buffer_put_string(m, signature, siglen); 737 if ((r = sshbuf_put_string(m, signature, siglen)) != 0)
738 fatal("%s: buffer error: %s", __func__, ssh_err(r));
733 739
734 free(p); 740 free(p);
735 free(signature); 741 free(signature);
diff --git a/session.c b/session.c
index e12f6677e..fbb921bea 100644
--- a/session.c
+++ b/session.c
@@ -1,4 +1,4 @@
1/* $OpenBSD: session.c,v 1.275 2014/12/22 07:55:51 djm Exp $ */ 1/* $OpenBSD: session.c,v 1.276 2015/01/14 20:05:27 djm Exp $ */
2/* 2/*
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4 * All rights reserved 4 * All rights reserved
@@ -1620,11 +1620,11 @@ launch_login(struct passwd *pw, const char *hostname)
1620static void 1620static void
1621child_close_fds(void) 1621child_close_fds(void)
1622{ 1622{
1623 extern AuthenticationConnection *auth_conn; 1623 extern int auth_sock;
1624 1624
1625 if (auth_conn) { 1625 if (auth_sock != -1) {
1626 ssh_close_authentication_connection(auth_conn); 1626 close(auth_sock);
1627 auth_conn = NULL; 1627 auth_sock = -1;
1628 } 1628 }
1629 1629
1630 if (packet_get_connection_in() == packet_get_connection_out()) 1630 if (packet_get_connection_in() == packet_get_connection_out())
diff --git a/ssh-add.c b/ssh-add.c
index 8f369be4d..32add8807 100644
--- a/ssh-add.c
+++ b/ssh-add.c
@@ -1,4 +1,4 @@
1/* $OpenBSD: ssh-add.c,v 1.115 2014/12/21 22:27:56 djm Exp $ */ 1/* $OpenBSD: ssh-add.c,v 1.116 2015/01/14 20:05:27 djm Exp $ */
2/* 2/*
3 * Author: Tatu Ylonen <ylo@cs.hut.fi> 3 * Author: Tatu Ylonen <ylo@cs.hut.fi>
4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -44,6 +44,7 @@
44#include <openssl/evp.h> 44#include <openssl/evp.h>
45#include "openbsd-compat/openssl-compat.h" 45#include "openbsd-compat/openssl-compat.h"
46 46
47#include <errno.h>
47#include <fcntl.h> 48#include <fcntl.h>
48#include <pwd.h> 49#include <pwd.h>
49#include <stdarg.h> 50#include <stdarg.h>
@@ -56,8 +57,8 @@
56#include "ssh.h" 57#include "ssh.h"
57#include "rsa.h" 58#include "rsa.h"
58#include "log.h" 59#include "log.h"
59#include "key.h" 60#include "sshkey.h"
60#include "buffer.h" 61#include "sshbuf.h"
61#include "authfd.h" 62#include "authfd.h"
62#include "authfile.h" 63#include "authfile.h"
63#include "pathnames.h" 64#include "pathnames.h"
@@ -103,22 +104,22 @@ clear_pass(void)
103} 104}
104 105
105static int 106static int
106delete_file(AuthenticationConnection *ac, const char *filename, int key_only) 107delete_file(int agent_fd, const char *filename, int key_only)
107{ 108{
108 Key *public = NULL, *cert = NULL; 109 struct sshkey *public, *cert = NULL;
109 char *certpath = NULL, *comment = NULL; 110 char *certpath = NULL, *comment = NULL;
110 int ret = -1; 111 int r, ret = -1;
111 112
112 public = key_load_public(filename, &comment); 113 if ((r = sshkey_load_public(filename, &public, &comment)) != 0) {
113 if (public == NULL) { 114 printf("Bad key file %s: %s\n", filename, ssh_err(r));
114 printf("Bad key file %s\n", filename);
115 return -1; 115 return -1;
116 } 116 }
117 if (ssh_remove_identity(ac, public)) { 117 if ((r = ssh_remove_identity(agent_fd, public)) == 0) {
118 fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment); 118 fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment);
119 ret = 0; 119 ret = 0;
120 } else 120 } else
121 fprintf(stderr, "Could not remove identity: %s\n", filename); 121 fprintf(stderr, "Could not remove identity \"%s\": %s\n",
122 filename, ssh_err(r));
122 123
123 if (key_only) 124 if (key_only)
124 goto out; 125 goto out;
@@ -127,13 +128,13 @@ delete_file(AuthenticationConnection *ac, const char *filename, int key_only)
127 free(comment); 128 free(comment);
128 comment = NULL; 129 comment = NULL;
129 xasprintf(&certpath, "%s-cert.pub", filename); 130 xasprintf(&certpath, "%s-cert.pub", filename);
130 if ((cert = key_load_public(certpath, &comment)) == NULL) 131 if ((r = sshkey_load_public(certpath, &cert, &comment)) == 0)
131 goto out; 132 goto out;
132 if (!key_equal_public(cert, public)) 133 if (!sshkey_equal_public(cert, public))
133 fatal("Certificate %s does not match private key %s", 134 fatal("Certificate %s does not match private key %s",
134 certpath, filename); 135 certpath, filename);
135 136
136 if (ssh_remove_identity(ac, cert)) { 137 if (ssh_remove_identity(agent_fd, cert)) {
137 fprintf(stderr, "Identity removed: %s (%s)\n", certpath, 138 fprintf(stderr, "Identity removed: %s (%s)\n", certpath,
138 comment); 139 comment);
139 ret = 0; 140 ret = 0;
@@ -142,9 +143,9 @@ delete_file(AuthenticationConnection *ac, const char *filename, int key_only)
142 143
143 out: 144 out:
144 if (cert != NULL) 145 if (cert != NULL)
145 key_free(cert); 146 sshkey_free(cert);
146 if (public != NULL) 147 if (public != NULL)
147 key_free(public); 148 sshkey_free(public);
148 free(certpath); 149 free(certpath);
149 free(comment); 150 free(comment);
150 151
@@ -153,14 +154,15 @@ delete_file(AuthenticationConnection *ac, const char *filename, int key_only)
153 154
154/* Send a request to remove all identities. */ 155/* Send a request to remove all identities. */
155static int 156static int
156delete_all(AuthenticationConnection *ac) 157delete_all(int agent_fd)
157{ 158{
158 int ret = -1; 159 int ret = -1;
159 160
160 if (ssh_remove_all_identities(ac, 1)) 161 if (ssh_remove_all_identities(agent_fd, 1) == 0)
161 ret = 0; 162 ret = 0;
162 /* ignore error-code for ssh2 */ 163 /* ignore error-code for ssh2 */
163 ssh_remove_all_identities(ac, 2); 164 /* XXX revisit */
165 ssh_remove_all_identities(agent_fd, 2);
164 166
165 if (ret == 0) 167 if (ret == 0)
166 fprintf(stderr, "All identities removed.\n"); 168 fprintf(stderr, "All identities removed.\n");
@@ -171,13 +173,13 @@ delete_all(AuthenticationConnection *ac)
171} 173}
172 174
173static int 175static int
174add_file(AuthenticationConnection *ac, const char *filename, int key_only) 176add_file(int agent_fd, const char *filename, int key_only)
175{ 177{
176 Key *private, *cert; 178 struct sshkey *private, *cert;
177 char *comment = NULL; 179 char *comment = NULL;
178 char msg[1024], *certpath = NULL; 180 char msg[1024], *certpath = NULL;
179 int r, fd, perms_ok, ret = -1; 181 int r, fd, ret = -1;
180 Buffer keyblob; 182 struct sshbuf *keyblob;
181 183
182 if (strcmp(filename, "-") == 0) { 184 if (strcmp(filename, "-") == 0) {
183 fd = STDIN_FILENO; 185 fd = STDIN_FILENO;
@@ -192,30 +194,38 @@ add_file(AuthenticationConnection *ac, const char *filename, int key_only)
192 * will occur multiple times, so check perms first and bail if wrong. 194 * will occur multiple times, so check perms first and bail if wrong.
193 */ 195 */
194 if (fd != STDIN_FILENO) { 196 if (fd != STDIN_FILENO) {
195 perms_ok = key_perm_ok(fd, filename); 197 if (sshkey_perm_ok(fd, filename) != 0) {
196 if (!perms_ok) {
197 close(fd); 198 close(fd);
198 return -1; 199 return -1;
199 } 200 }
200 } 201 }
201 buffer_init(&keyblob); 202 if ((keyblob = sshbuf_new()) == NULL)
202 if (!key_load_file(fd, filename, &keyblob)) { 203 fatal("%s: sshbuf_new failed", __func__);
203 buffer_free(&keyblob); 204 if ((r = sshkey_load_file(fd, keyblob)) != 0) {
205 fprintf(stderr, "Error loading key \"%s\": %s\n",
206 filename, ssh_err(r));
207 sshbuf_free(keyblob);
204 close(fd); 208 close(fd);
205 return -1; 209 return -1;
206 } 210 }
207 close(fd); 211 close(fd);
208 212
209 /* At first, try empty passphrase */ 213 /* At first, try empty passphrase */
210 if ((r = sshkey_parse_private_fileblob(&keyblob, "", filename, 214 if ((r = sshkey_parse_private_fileblob(keyblob, "", filename,
211 &private, &comment)) != 0 && r != SSH_ERR_KEY_WRONG_PASSPHRASE) 215 &private, &comment)) != 0 && r != SSH_ERR_KEY_WRONG_PASSPHRASE) {
212 fatal("Cannot parse %s: %s", filename, ssh_err(r)); 216 fprintf(stderr, "Error loading key \"%s\": %s\n",
217 filename, ssh_err(r));
218 goto fail_load;
219 }
213 /* try last */ 220 /* try last */
214 if (private == NULL && pass != NULL) { 221 if (private == NULL && pass != NULL) {
215 if ((r = sshkey_parse_private_fileblob(&keyblob, pass, filename, 222 if ((r = sshkey_parse_private_fileblob(keyblob, pass, filename,
216 &private, &comment)) != 0 && 223 &private, &comment)) != 0 &&
217 r != SSH_ERR_KEY_WRONG_PASSPHRASE) 224 r != SSH_ERR_KEY_WRONG_PASSPHRASE) {
218 fatal("Cannot parse %s: %s", filename, ssh_err(r)); 225 fprintf(stderr, "Error loading key \"%s\": %s\n",
226 filename, ssh_err(r));
227 goto fail_load;
228 }
219 } 229 }
220 if (comment == NULL) 230 if (comment == NULL)
221 comment = xstrdup(filename); 231 comment = xstrdup(filename);
@@ -226,28 +236,30 @@ add_file(AuthenticationConnection *ac, const char *filename, int key_only)
226 comment); 236 comment);
227 for (;;) { 237 for (;;) {
228 pass = read_passphrase(msg, RP_ALLOW_STDIN); 238 pass = read_passphrase(msg, RP_ALLOW_STDIN);
229 if (strcmp(pass, "") == 0) { 239 if (strcmp(pass, "") == 0)
240 goto fail_load;
241 if ((r = sshkey_parse_private_fileblob(keyblob, pass,
242 filename, &private, NULL)) == 0)
243 break;
244 else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) {
245 fprintf(stderr,
246 "Error loading key \"%s\": %s\n",
247 filename, ssh_err(r));
248 fail_load:
230 clear_pass(); 249 clear_pass();
231 free(comment); 250 free(comment);
232 buffer_free(&keyblob); 251 sshbuf_free(keyblob);
233 return -1; 252 return -1;
234 } 253 }
235 if ((r = sshkey_parse_private_fileblob(&keyblob,
236 pass, filename, &private, NULL)) != 0 &&
237 r != SSH_ERR_KEY_WRONG_PASSPHRASE)
238 fatal("Cannot parse %s: %s",
239 filename, ssh_err(r));
240 if (private != NULL)
241 break;
242 clear_pass(); 254 clear_pass();
243 snprintf(msg, sizeof msg, 255 snprintf(msg, sizeof msg,
244 "Bad passphrase, try again for %.200s: ", comment); 256 "Bad passphrase, try again for %.200s: ", comment);
245 } 257 }
246 } 258 }
247 buffer_free(&keyblob); 259 sshbuf_free(keyblob);
248 260
249 if (ssh_add_identity_constrained(ac, private, comment, lifetime, 261 if ((r = ssh_add_identity_constrained(agent_fd, private, comment,
250 confirm)) { 262 lifetime, confirm)) == 0) {
251 fprintf(stderr, "Identity added: %s (%s)\n", filename, comment); 263 fprintf(stderr, "Identity added: %s (%s)\n", filename, comment);
252 ret = 0; 264 ret = 0;
253 if (lifetime != 0) 265 if (lifetime != 0)
@@ -257,7 +269,8 @@ add_file(AuthenticationConnection *ac, const char *filename, int key_only)
257 fprintf(stderr, 269 fprintf(stderr,
258 "The user must confirm each use of the key\n"); 270 "The user must confirm each use of the key\n");
259 } else { 271 } else {
260 fprintf(stderr, "Could not add identity: %s\n", filename); 272 fprintf(stderr, "Could not add identity \"%s\": %s\n",
273 filename, ssh_err(r));
261 } 274 }
262 275
263 /* Skip trying to load the cert if requested */ 276 /* Skip trying to load the cert if requested */
@@ -266,29 +279,39 @@ add_file(AuthenticationConnection *ac, const char *filename, int key_only)
266 279
267 /* Now try to add the certificate flavour too */ 280 /* Now try to add the certificate flavour too */
268 xasprintf(&certpath, "%s-cert.pub", filename); 281 xasprintf(&certpath, "%s-cert.pub", filename);
269 if ((cert = key_load_public(certpath, NULL)) == NULL) 282 if ((r = sshkey_load_public(certpath, &cert, NULL)) != 0) {
283 if (r != SSH_ERR_SYSTEM_ERROR || errno != ENOENT)
284 error("Failed to load certificate \"%s\": %s",
285 certpath, ssh_err(r));
270 goto out; 286 goto out;
287 }
271 288
272 if (!key_equal_public(cert, private)) { 289 if (!sshkey_equal_public(cert, private)) {
273 error("Certificate %s does not match private key %s", 290 error("Certificate %s does not match private key %s",
274 certpath, filename); 291 certpath, filename);
275 key_free(cert); 292 sshkey_free(cert);
276 goto out; 293 goto out;
277 } 294 }
278 295
279 /* Graft with private bits */ 296 /* Graft with private bits */
280 if (key_to_certified(private, key_cert_is_legacy(cert)) != 0) { 297 if ((r = sshkey_to_certified(private,
281 error("%s: key_to_certified failed", __func__); 298 sshkey_cert_is_legacy(cert))) != 0) {
282 key_free(cert); 299 error("%s: sshkey_to_certified: %s", __func__, ssh_err(r));
300 sshkey_free(cert);
301 goto out;
302 }
303 if ((r = sshkey_cert_copy(cert, private)) != 0) {
304 error("%s: key_cert_copy: %s", __func__, ssh_err(r));
305 sshkey_free(cert);
283 goto out; 306 goto out;
284 } 307 }
285 key_cert_copy(cert, private); 308 sshkey_free(cert);
286 key_free(cert);
287 309
288 if (!ssh_add_identity_constrained(ac, private, comment, 310 if ((r = ssh_add_identity_constrained(agent_fd, private, comment,
289 lifetime, confirm)) { 311 lifetime, confirm)) != 0) {
290 error("Certificate %s (%s) add failed", certpath, 312 error("Certificate %s (%s) add failed: %s", certpath,
291 private->cert->key_id); 313 private->cert->key_id, ssh_err(r));
314 goto out;
292 } 315 }
293 fprintf(stderr, "Certificate added: %s (%s)\n", certpath, 316 fprintf(stderr, "Certificate added: %s (%s)\n", certpath,
294 private->cert->key_id); 317 private->cert->key_id);
@@ -297,19 +320,18 @@ add_file(AuthenticationConnection *ac, const char *filename, int key_only)
297 if (confirm != 0) 320 if (confirm != 0)
298 fprintf(stderr, "The user must confirm each use of the key\n"); 321 fprintf(stderr, "The user must confirm each use of the key\n");
299 out: 322 out:
300 if (certpath != NULL) 323 free(certpath);
301 free(certpath);
302 free(comment); 324 free(comment);
303 key_free(private); 325 sshkey_free(private);
304 326
305 return ret; 327 return ret;
306} 328}
307 329
308static int 330static int
309update_card(AuthenticationConnection *ac, int add, const char *id) 331update_card(int agent_fd, int add, const char *id)
310{ 332{
311 char *pin = NULL; 333 char *pin = NULL;
312 int ret = -1; 334 int r, ret = -1;
313 335
314 if (add) { 336 if (add) {
315 if ((pin = read_passphrase("Enter passphrase for PKCS#11: ", 337 if ((pin = read_passphrase("Enter passphrase for PKCS#11: ",
@@ -317,14 +339,14 @@ update_card(AuthenticationConnection *ac, int add, const char *id)
317 return -1; 339 return -1;
318 } 340 }
319 341
320 if (ssh_update_card(ac, add, id, pin == NULL ? "" : pin, 342 if ((r = ssh_update_card(agent_fd, add, id, pin == NULL ? "" : pin,
321 lifetime, confirm)) { 343 lifetime, confirm)) == 0) {
322 fprintf(stderr, "Card %s: %s\n", 344 fprintf(stderr, "Card %s: %s\n",
323 add ? "added" : "removed", id); 345 add ? "added" : "removed", id);
324 ret = 0; 346 ret = 0;
325 } else { 347 } else {
326 fprintf(stderr, "Could not %s card: %s\n", 348 fprintf(stderr, "Could not %s card \"%s\": %s\n",
327 add ? "add" : "remove", id); 349 add ? "add" : "remove", id, ssh_err(r));
328 ret = -1; 350 ret = -1;
329 } 351 }
330 free(pin); 352 free(pin);
@@ -332,32 +354,42 @@ update_card(AuthenticationConnection *ac, int add, const char *id)
332} 354}
333 355
334static int 356static int
335list_identities(AuthenticationConnection *ac, int do_fp) 357list_identities(int agent_fd, int do_fp)
336{ 358{
337 Key *key; 359 char *fp;
338 char *comment, *fp; 360 int version, r, had_identities = 0;
339 int had_identities = 0; 361 struct ssh_identitylist *idlist;
340 int version; 362 size_t i;
341 363
342 for (version = 1; version <= 2; version++) { 364 for (version = 1; version <= 2; version++) {
343 for (key = ssh_get_first_identity(ac, &comment, version); 365 if ((r = ssh_fetch_identitylist(agent_fd, version,
344 key != NULL; 366 &idlist)) != 0) {
345 key = ssh_get_next_identity(ac, &comment, version)) { 367 if (r != SSH_ERR_AGENT_NO_IDENTITIES)
368 fprintf(stderr, "error fetching identities for "
369 "protocol %d: %s\n", version, ssh_err(r));
370 continue;
371 }
372 for (i = 0; i < idlist->nkeys; i++) {
346 had_identities = 1; 373 had_identities = 1;
347 if (do_fp) { 374 if (do_fp) {
348 fp = key_fingerprint(key, fingerprint_hash, 375 fp = sshkey_fingerprint(idlist->keys[i],
349 SSH_FP_DEFAULT); 376 fingerprint_hash, SSH_FP_DEFAULT);
350 printf("%d %s %s (%s)\n", 377 printf("%d %s %s (%s)\n",
351 key_size(key), fp, comment, key_type(key)); 378 sshkey_size(idlist->keys[i]), fp,
379 idlist->comments[i],
380 sshkey_type(idlist->keys[i]));
352 free(fp); 381 free(fp);
353 } else { 382 } else {
354 if (!key_write(key, stdout)) 383 if ((r = sshkey_write(idlist->keys[i],
355 fprintf(stderr, "key_write failed"); 384 stdout)) != 0) {
356 fprintf(stdout, " %s\n", comment); 385 fprintf(stderr, "sshkey_write: %s\n",
386 ssh_err(r));
387 continue;
388 }
389 fprintf(stdout, " %s\n", idlist->comments[i]);
357 } 390 }
358 key_free(key);
359 free(comment);
360 } 391 }
392 ssh_free_identitylist(idlist);
361 } 393 }
362 if (!had_identities) { 394 if (!had_identities) {
363 printf("The agent has no identities.\n"); 395 printf("The agent has no identities.\n");
@@ -367,10 +399,10 @@ list_identities(AuthenticationConnection *ac, int do_fp)
367} 399}
368 400
369static int 401static int
370lock_agent(AuthenticationConnection *ac, int lock) 402lock_agent(int agent_fd, int lock)
371{ 403{
372 char prompt[100], *p1, *p2; 404 char prompt[100], *p1, *p2;
373 int passok = 1, ret = -1; 405 int r, passok = 1, ret = -1;
374 406
375 strlcpy(prompt, "Enter lock password: ", sizeof(prompt)); 407 strlcpy(prompt, "Enter lock password: ", sizeof(prompt));
376 p1 = read_passphrase(prompt, RP_ALLOW_STDIN); 408 p1 = read_passphrase(prompt, RP_ALLOW_STDIN);
@@ -384,24 +416,28 @@ lock_agent(AuthenticationConnection *ac, int lock)
384 explicit_bzero(p2, strlen(p2)); 416 explicit_bzero(p2, strlen(p2));
385 free(p2); 417 free(p2);
386 } 418 }
387 if (passok && ssh_lock_agent(ac, lock, p1)) { 419 if (passok) {
388 fprintf(stderr, "Agent %slocked.\n", lock ? "" : "un"); 420 if ((r = ssh_lock_agent(agent_fd, lock, p1)) == 0) {
389 ret = 0; 421 fprintf(stderr, "Agent %slocked.\n", lock ? "" : "un");
390 } else 422 ret = 0;
391 fprintf(stderr, "Failed to %slock agent.\n", lock ? "" : "un"); 423 } else {
424 fprintf(stderr, "Failed to %slock agent: %s\n",
425 lock ? "" : "un", ssh_err(r));
426 }
427 }
392 explicit_bzero(p1, strlen(p1)); 428 explicit_bzero(p1, strlen(p1));
393 free(p1); 429 free(p1);
394 return (ret); 430 return (ret);
395} 431}
396 432
397static int 433static int
398do_file(AuthenticationConnection *ac, int deleting, int key_only, char *file) 434do_file(int agent_fd, int deleting, int key_only, char *file)
399{ 435{
400 if (deleting) { 436 if (deleting) {
401 if (delete_file(ac, file, key_only) == -1) 437 if (delete_file(agent_fd, file, key_only) == -1)
402 return -1; 438 return -1;
403 } else { 439 } else {
404 if (add_file(ac, file, key_only) == -1) 440 if (add_file(agent_fd, file, key_only) == -1)
405 return -1; 441 return -1;
406 } 442 }
407 return 0; 443 return 0;
@@ -431,9 +467,9 @@ main(int argc, char **argv)
431{ 467{
432 extern char *optarg; 468 extern char *optarg;
433 extern int optind; 469 extern int optind;
434 AuthenticationConnection *ac = NULL; 470 int agent_fd;
435 char *pkcs11provider = NULL; 471 char *pkcs11provider = NULL;
436 int i, ch, deleting = 0, ret = 0, key_only = 0; 472 int r, i, ch, deleting = 0, ret = 0, key_only = 0;
437 int xflag = 0, lflag = 0, Dflag = 0; 473 int xflag = 0, lflag = 0, Dflag = 0;
438 474
439 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ 475 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
@@ -448,13 +484,19 @@ main(int argc, char **argv)
448 484
449 setvbuf(stdout, NULL, _IOLBF, 0); 485 setvbuf(stdout, NULL, _IOLBF, 0);
450 486
451 /* At first, get a connection to the authentication agent. */ 487 /* First, get a connection to the authentication agent. */
452 ac = ssh_get_authentication_connection(); 488 switch (r = ssh_get_authentication_socket(&agent_fd)) {
453 if (ac == NULL) { 489 case 0:
454 fprintf(stderr, 490 break;
455 "Could not open a connection to your authentication agent.\n"); 491 case SSH_ERR_AGENT_NOT_PRESENT:
492 fprintf(stderr, "Could not open a connection to your "
493 "authentication agent.\n");
494 exit(2);
495 default:
496 fprintf(stderr, "Error connecting to agent: %s\n", ssh_err(r));
456 exit(2); 497 exit(2);
457 } 498 }
499
458 while ((ch = getopt(argc, argv, "klLcdDxXE:e:s:t:")) != -1) { 500 while ((ch = getopt(argc, argv, "klLcdDxXE:e:s:t:")) != -1) {
459 switch (ch) { 501 switch (ch) {
460 case 'E': 502 case 'E':
@@ -510,15 +552,15 @@ main(int argc, char **argv)
510 if ((xflag != 0) + (lflag != 0) + (Dflag != 0) > 1) 552 if ((xflag != 0) + (lflag != 0) + (Dflag != 0) > 1)
511 fatal("Invalid combination of actions"); 553 fatal("Invalid combination of actions");
512 else if (xflag) { 554 else if (xflag) {
513 if (lock_agent(ac, xflag == 'x' ? 1 : 0) == -1) 555 if (lock_agent(agent_fd, xflag == 'x' ? 1 : 0) == -1)
514 ret = 1; 556 ret = 1;
515 goto done; 557 goto done;
516 } else if (lflag) { 558 } else if (lflag) {
517 if (list_identities(ac, lflag == 'l' ? 1 : 0) == -1) 559 if (list_identities(agent_fd, lflag == 'l' ? 1 : 0) == -1)
518 ret = 1; 560 ret = 1;
519 goto done; 561 goto done;
520 } else if (Dflag) { 562 } else if (Dflag) {
521 if (delete_all(ac) == -1) 563 if (delete_all(agent_fd) == -1)
522 ret = 1; 564 ret = 1;
523 goto done; 565 goto done;
524 } 566 }
@@ -526,7 +568,7 @@ main(int argc, char **argv)
526 argc -= optind; 568 argc -= optind;
527 argv += optind; 569 argv += optind;
528 if (pkcs11provider != NULL) { 570 if (pkcs11provider != NULL) {
529 if (update_card(ac, !deleting, pkcs11provider) == -1) 571 if (update_card(agent_fd, !deleting, pkcs11provider) == -1)
530 ret = 1; 572 ret = 1;
531 goto done; 573 goto done;
532 } 574 }
@@ -548,7 +590,7 @@ main(int argc, char **argv)
548 default_files[i]); 590 default_files[i]);
549 if (stat(buf, &st) < 0) 591 if (stat(buf, &st) < 0)
550 continue; 592 continue;
551 if (do_file(ac, deleting, key_only, buf) == -1) 593 if (do_file(agent_fd, deleting, key_only, buf) == -1)
552 ret = 1; 594 ret = 1;
553 else 595 else
554 count++; 596 count++;
@@ -557,13 +599,14 @@ main(int argc, char **argv)
557 ret = 1; 599 ret = 1;
558 } else { 600 } else {
559 for (i = 0; i < argc; i++) { 601 for (i = 0; i < argc; i++) {
560 if (do_file(ac, deleting, key_only, argv[i]) == -1) 602 if (do_file(agent_fd, deleting, key_only,
603 argv[i]) == -1)
561 ret = 1; 604 ret = 1;
562 } 605 }
563 } 606 }
564 clear_pass(); 607 clear_pass();
565 608
566done: 609done:
567 ssh_close_authentication_connection(ac); 610 ssh_close_authentication_socket(agent_fd);
568 return ret; 611 return ret;
569} 612}
diff --git a/ssh.c b/ssh.c
index 36416fa28..df7274f4c 100644
--- a/ssh.c
+++ b/ssh.c
@@ -1,4 +1,4 @@
1/* $OpenBSD: ssh.c,v 1.411 2015/01/08 10:15:45 djm Exp $ */ 1/* $OpenBSD: ssh.c,v 1.412 2015/01/14 20:05:27 djm Exp $ */
2/* 2/*
3 * Author: Tatu Ylonen <ylo@cs.hut.fi> 3 * Author: Tatu Ylonen <ylo@cs.hut.fi>
4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -107,6 +107,7 @@
107#include "uidswap.h" 107#include "uidswap.h"
108#include "roaming.h" 108#include "roaming.h"
109#include "version.h" 109#include "version.h"
110#include "ssherr.h"
110 111
111#ifdef ENABLE_PKCS11 112#ifdef ENABLE_PKCS11
112#include "ssh-pkcs11.h" 113#include "ssh-pkcs11.h"
@@ -1502,10 +1503,16 @@ ssh_init_forwarding(void)
1502static void 1503static void
1503check_agent_present(void) 1504check_agent_present(void)
1504{ 1505{
1506 int r;
1507
1505 if (options.forward_agent) { 1508 if (options.forward_agent) {
1506 /* Clear agent forwarding if we don't have an agent. */ 1509 /* Clear agent forwarding if we don't have an agent. */
1507 if (!ssh_agent_present()) 1510 if ((r = ssh_get_authentication_socket(NULL)) != 0) {
1508 options.forward_agent = 0; 1511 options.forward_agent = 0;
1512 if (r != SSH_ERR_AGENT_NOT_PRESENT)
1513 debug("ssh_get_authentication_socket: %s",
1514 ssh_err(r));
1515 }
1509 } 1516 }
1510} 1517}
1511 1518
diff --git a/sshconnect1.c b/sshconnect1.c
index 08589f5ee..016abbce5 100644
--- a/sshconnect1.c
+++ b/sshconnect1.c
@@ -1,4 +1,4 @@
1/* $OpenBSD: sshconnect1.c,v 1.76 2014/07/15 15:54:14 millert Exp $ */ 1/* $OpenBSD: sshconnect1.c,v 1.77 2015/01/14 20:05:27 djm Exp $ */
2/* 2/*
3 * Author: Tatu Ylonen <ylo@cs.hut.fi> 3 * Author: Tatu Ylonen <ylo@cs.hut.fi>
4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -22,6 +22,7 @@
22 22
23#include <openssl/bn.h> 23#include <openssl/bn.h>
24 24
25#include <errno.h>
25#include <stdarg.h> 26#include <stdarg.h>
26#include <stdio.h> 27#include <stdio.h>
27#include <stdlib.h> 28#include <stdlib.h>
@@ -49,6 +50,7 @@
49#include "hostfile.h" 50#include "hostfile.h"
50#include "auth.h" 51#include "auth.h"
51#include "digest.h" 52#include "digest.h"
53#include "ssherr.h"
52 54
53/* Session id for the current session. */ 55/* Session id for the current session. */
54u_char session_id[16]; 56u_char session_id[16];
@@ -64,33 +66,38 @@ extern char *__progname;
64static int 66static int
65try_agent_authentication(void) 67try_agent_authentication(void)
66{ 68{
67 int type; 69 int r, type, agent_fd, ret = 0;
68 char *comment;
69 AuthenticationConnection *auth;
70 u_char response[16]; 70 u_char response[16];
71 u_int i; 71 size_t i;
72 Key *key;
73 BIGNUM *challenge; 72 BIGNUM *challenge;
73 struct ssh_identitylist *idlist = NULL;
74 74
75 /* Get connection to the agent. */ 75 /* Get connection to the agent. */
76 auth = ssh_get_authentication_connection(); 76 if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) {
77 if (!auth) 77 if (r != SSH_ERR_AGENT_NOT_PRESENT)
78 debug("%s: ssh_get_authentication_socket: %s",
79 __func__, ssh_err(r));
78 return 0; 80 return 0;
81 }
79 82
80 if ((challenge = BN_new()) == NULL) 83 if ((challenge = BN_new()) == NULL)
81 fatal("try_agent_authentication: BN_new failed"); 84 fatal("try_agent_authentication: BN_new failed");
82 /* Loop through identities served by the agent. */
83 for (key = ssh_get_first_identity(auth, &comment, 1);
84 key != NULL;
85 key = ssh_get_next_identity(auth, &comment, 1)) {
86 85
86 /* Loop through identities served by the agent. */
87 if ((r = ssh_fetch_identitylist(agent_fd, 1, &idlist)) != 0) {
88 if (r != SSH_ERR_AGENT_NO_IDENTITIES)
89 debug("%s: ssh_fetch_identitylist: %s",
90 __func__, ssh_err(r));
91 goto out;
92 }
93 for (i = 0; i < idlist->nkeys; i++) {
87 /* Try this identity. */ 94 /* Try this identity. */
88 debug("Trying RSA authentication via agent with '%.100s'", comment); 95 debug("Trying RSA authentication via agent with '%.100s'",
89 free(comment); 96 idlist->comments[i]);
90 97
91 /* Tell the server that we are willing to authenticate using this key. */ 98 /* Tell the server that we are willing to authenticate using this key. */
92 packet_start(SSH_CMSG_AUTH_RSA); 99 packet_start(SSH_CMSG_AUTH_RSA);
93 packet_put_bignum(key->rsa->n); 100 packet_put_bignum(idlist->keys[i]->rsa->n);
94 packet_send(); 101 packet_send();
95 packet_write_wait(); 102 packet_write_wait();
96 103
@@ -101,7 +108,6 @@ try_agent_authentication(void)
101 does not support RSA authentication. */ 108 does not support RSA authentication. */
102 if (type == SSH_SMSG_FAILURE) { 109 if (type == SSH_SMSG_FAILURE) {
103 debug("Server refused our key."); 110 debug("Server refused our key.");
104 key_free(key);
105 continue; 111 continue;
106 } 112 }
107 /* Otherwise it should have sent a challenge. */ 113 /* Otherwise it should have sent a challenge. */
@@ -115,16 +121,17 @@ try_agent_authentication(void)
115 debug("Received RSA challenge from server."); 121 debug("Received RSA challenge from server.");
116 122
117 /* Ask the agent to decrypt the challenge. */ 123 /* Ask the agent to decrypt the challenge. */
118 if (!ssh_decrypt_challenge(auth, key, challenge, session_id, 1, response)) { 124 if ((r = ssh_decrypt_challenge(agent_fd, idlist->keys[i],
125 challenge, session_id, response)) != 0) {
119 /* 126 /*
120 * The agent failed to authenticate this identifier 127 * The agent failed to authenticate this identifier
121 * although it advertised it supports this. Just 128 * although it advertised it supports this. Just
122 * return a wrong value. 129 * return a wrong value.
123 */ 130 */
124 logit("Authentication agent failed to decrypt challenge."); 131 logit("Authentication agent failed to decrypt "
132 "challenge: %s", ssh_err(r));
125 explicit_bzero(response, sizeof(response)); 133 explicit_bzero(response, sizeof(response));
126 } 134 }
127 key_free(key);
128 debug("Sending response to RSA challenge."); 135 debug("Sending response to RSA challenge.");
129 136
130 /* Send the decrypted challenge back to the server. */ 137 /* Send the decrypted challenge back to the server. */
@@ -137,22 +144,25 @@ try_agent_authentication(void)
137 /* Wait for response from the server. */ 144 /* Wait for response from the server. */
138 type = packet_read(); 145 type = packet_read();
139 146
140 /* The server returns success if it accepted the authentication. */ 147 /*
148 * The server returns success if it accepted the
149 * authentication.
150 */
141 if (type == SSH_SMSG_SUCCESS) { 151 if (type == SSH_SMSG_SUCCESS) {
142 ssh_close_authentication_connection(auth);
143 BN_clear_free(challenge);
144 debug("RSA authentication accepted by server."); 152 debug("RSA authentication accepted by server.");
145 return 1; 153 ret = 1;
146 } 154 break;
147 /* Otherwise it should return failure. */ 155 } else if (type != SSH_SMSG_FAILURE)
148 if (type != SSH_SMSG_FAILURE) 156 packet_disconnect("Protocol error waiting RSA auth "
149 packet_disconnect("Protocol error waiting RSA auth response: %d", 157 "response: %d", type);
150 type);
151 } 158 }
152 ssh_close_authentication_connection(auth); 159 if (ret != 1)
160 debug("RSA authentication using agent refused.");
161 out:
162 ssh_free_identitylist(idlist);
163 ssh_close_authentication_socket(agent_fd);
153 BN_clear_free(challenge); 164 BN_clear_free(challenge);
154 debug("RSA authentication using agent refused."); 165 return ret;
155 return 0;
156} 166}
157 167
158/* 168/*
diff --git a/sshconnect2.c b/sshconnect2.c
index 6a7b69938..343ca7459 100644
--- a/sshconnect2.c
+++ b/sshconnect2.c
@@ -1,4 +1,4 @@
1/* $OpenBSD: sshconnect2.c,v 1.213 2015/01/08 10:14:08 djm Exp $ */ 1/* $OpenBSD: sshconnect2.c,v 1.214 2015/01/14 20:05:27 djm Exp $ */
2/* 2/*
3 * Copyright (c) 2000 Markus Friedl. All rights reserved. 3 * Copyright (c) 2000 Markus Friedl. All rights reserved.
4 * Copyright (c) 2008 Damien Miller. All rights reserved. 4 * Copyright (c) 2008 Damien Miller. All rights reserved.
@@ -70,6 +70,7 @@
70#include "pathnames.h" 70#include "pathnames.h"
71#include "uidswap.h" 71#include "uidswap.h"
72#include "hostfile.h" 72#include "hostfile.h"
73#include "ssherr.h"
73 74
74#ifdef GSSAPI 75#ifdef GSSAPI
75#include "ssh-gss.h" 76#include "ssh-gss.h"
@@ -131,10 +132,10 @@ order_hostkeyalgs(char *host, struct sockaddr *hostaddr, u_short port)
131 } while (0) 132 } while (0)
132 133
133 while ((alg = strsep(&avail, ",")) && *alg != '\0') { 134 while ((alg = strsep(&avail, ",")) && *alg != '\0') {
134 if ((ktype = key_type_from_name(alg)) == KEY_UNSPEC) 135 if ((ktype = sshkey_type_from_name(alg)) == KEY_UNSPEC)
135 fatal("%s: unknown alg %s", __func__, alg); 136 fatal("%s: unknown alg %s", __func__, alg);
136 if (lookup_key_in_hostkeys_by_type(hostkeys, 137 if (lookup_key_in_hostkeys_by_type(hostkeys,
137 key_type_plain(ktype), NULL)) 138 sshkey_type_plain(ktype), NULL))
138 ALG_APPEND(first, alg); 139 ALG_APPEND(first, alg);
139 else 140 else
140 ALG_APPEND(last, alg); 141 ALG_APPEND(last, alg);
@@ -242,15 +243,15 @@ ssh_kex2(char *host, struct sockaddr *hostaddr, u_short port)
242 * Authenticate user 243 * Authenticate user
243 */ 244 */
244 245
245typedef struct Authctxt Authctxt; 246typedef struct cauthctxt Authctxt;
246typedef struct Authmethod Authmethod; 247typedef struct cauthmethod Authmethod;
247typedef struct identity Identity; 248typedef struct identity Identity;
248typedef struct idlist Idlist; 249typedef struct idlist Idlist;
249 250
250struct identity { 251struct identity {
251 TAILQ_ENTRY(identity) next; 252 TAILQ_ENTRY(identity) next;
252 AuthenticationConnection *ac; /* set if agent supports key */ 253 int agent_fd; /* >=0 if agent supports key */
253 Key *key; /* public/private key */ 254 struct sshkey *key; /* public/private key */
254 char *filename; /* comment for agent-only keys */ 255 char *filename; /* comment for agent-only keys */
255 int tried; 256 int tried;
256 int isprivate; /* key points to the private key */ 257 int isprivate; /* key points to the private key */
@@ -258,17 +259,18 @@ struct identity {
258}; 259};
259TAILQ_HEAD(idlist, identity); 260TAILQ_HEAD(idlist, identity);
260 261
261struct Authctxt { 262struct cauthctxt {
262 const char *server_user; 263 const char *server_user;
263 const char *local_user; 264 const char *local_user;
264 const char *host; 265 const char *host;
265 const char *service; 266 const char *service;
266 Authmethod *method; 267 struct cauthmethod *method;
267 sig_atomic_t success; 268 sig_atomic_t success;
268 char *authlist; 269 char *authlist;
270 int attempt;
269 /* pubkey */ 271 /* pubkey */
270 Idlist keys; 272 struct idlist keys;
271 AuthenticationConnection *agent; 273 int agent_fd;
272 /* hostbased */ 274 /* hostbased */
273 Sensitive *sensitive; 275 Sensitive *sensitive;
274 /* kbd-interactive */ 276 /* kbd-interactive */
@@ -276,7 +278,8 @@ struct Authctxt {
276 /* generic */ 278 /* generic */
277 void *methoddata; 279 void *methoddata;
278}; 280};
279struct Authmethod { 281
282struct cauthmethod {
280 char *name; /* string to compare against server's list */ 283 char *name; /* string to compare against server's list */
281 int (*userauth)(Authctxt *authctxt); 284 int (*userauth)(Authctxt *authctxt);
282 void (*cleanup)(Authctxt *authctxt); 285 void (*cleanup)(Authctxt *authctxt);
@@ -582,7 +585,7 @@ input_userauth_pk_ok(int type, u_int32_t seq, void *ctxt)
582 key->type, pktype); 585 key->type, pktype);
583 goto done; 586 goto done;
584 } 587 }
585 fp = key_fingerprint(key, options.fingerprint_hash, SSH_FP_DEFAULT); 588 fp = sshkey_fingerprint(key, options.fingerprint_hash, SSH_FP_DEFAULT);
586 debug2("input_userauth_pk_ok: fp %s", fp); 589 debug2("input_userauth_pk_ok: fp %s", fp);
587 free(fp); 590 free(fp);
588 591
@@ -956,27 +959,29 @@ input_userauth_passwd_changereq(int type, u_int32_t seqnr, void *ctxt)
956} 959}
957 960
958static int 961static int
959identity_sign(Identity *id, u_char **sigp, u_int *lenp, 962identity_sign(struct identity *id, u_char **sigp, size_t *lenp,
960 u_char *data, u_int datalen) 963 const u_char *data, size_t datalen, u_int compat)
961{ 964{
962 Key *prv; 965 Key *prv;
963 int ret; 966 int ret;
964 967
965 /* the agent supports this key */ 968 /* the agent supports this key */
966 if (id->ac) 969 if (id->agent_fd)
967 return (ssh_agent_sign(id->ac, id->key, sigp, lenp, 970 return ssh_agent_sign(id->agent_fd, id->key, sigp, lenp,
968 data, datalen)); 971 data, datalen, compat);
972
969 /* 973 /*
970 * we have already loaded the private key or 974 * we have already loaded the private key or
971 * the private key is stored in external hardware 975 * the private key is stored in external hardware
972 */ 976 */
973 if (id->isprivate || (id->key->flags & SSHKEY_FLAG_EXT)) 977 if (id->isprivate || (id->key->flags & SSHKEY_FLAG_EXT))
974 return (key_sign(id->key, sigp, lenp, data, datalen)); 978 return (sshkey_sign(id->key, sigp, lenp, data, datalen,
979 compat));
975 /* load the private key from the file */ 980 /* load the private key from the file */
976 if ((prv = load_identity_file(id->filename, id->userprovided)) == NULL) 981 if ((prv = load_identity_file(id->filename, id->userprovided)) == NULL)
977 return (-1); 982 return (-1); /* XXX return decent error code */
978 ret = key_sign(prv, sigp, lenp, data, datalen); 983 ret = sshkey_sign(prv, sigp, lenp, data, datalen, compat);
979 key_free(prv); 984 sshkey_free(prv);
980 return (ret); 985 return (ret);
981} 986}
982 987
@@ -985,7 +990,8 @@ sign_and_send_pubkey(Authctxt *authctxt, Identity *id)
985{ 990{
986 Buffer b; 991 Buffer b;
987 u_char *blob, *signature; 992 u_char *blob, *signature;
988 u_int bloblen, slen; 993 u_int bloblen;
994 size_t slen;
989 u_int skip = 0; 995 u_int skip = 0;
990 int ret = -1; 996 int ret = -1;
991 int have_sig = 1; 997 int have_sig = 1;
@@ -1026,8 +1032,8 @@ sign_and_send_pubkey(Authctxt *authctxt, Identity *id)
1026 1032
1027 /* generate signature */ 1033 /* generate signature */
1028 ret = identity_sign(id, &signature, &slen, 1034 ret = identity_sign(id, &signature, &slen,
1029 buffer_ptr(&b), buffer_len(&b)); 1035 buffer_ptr(&b), buffer_len(&b), datafellows);
1030 if (ret == -1) { 1036 if (ret != 0) {
1031 free(blob); 1037 free(blob);
1032 buffer_free(&b); 1038 buffer_free(&b);
1033 return 0; 1039 return 0;
@@ -1102,7 +1108,7 @@ load_identity_file(char *filename, int userprovided)
1102{ 1108{
1103 Key *private; 1109 Key *private;
1104 char prompt[300], *passphrase; 1110 char prompt[300], *passphrase;
1105 int perm_ok = 0, quit, i; 1111 int r, perm_ok = 0, quit, i;
1106 struct stat st; 1112 struct stat st;
1107 1113
1108 if (stat(filename, &st) < 0) { 1114 if (stat(filename, &st) < 0) {
@@ -1110,33 +1116,49 @@ load_identity_file(char *filename, int userprovided)
1110 filename, strerror(errno)); 1116 filename, strerror(errno));
1111 return NULL; 1117 return NULL;
1112 } 1118 }
1113 private = key_load_private_type(KEY_UNSPEC, filename, "", NULL, &perm_ok); 1119 snprintf(prompt, sizeof prompt,
1114 if (!perm_ok) { 1120 "Enter passphrase for key '%.100s': ", filename);
1115 if (private != NULL) 1121 for (i = 0; i <= options.number_of_password_prompts; i++) {
1116 key_free(private); 1122 if (i == 0)
1117 return NULL; 1123 passphrase = "";
1118 } 1124 else {
1119 if (private == NULL) {
1120 if (options.batch_mode)
1121 return NULL;
1122 snprintf(prompt, sizeof prompt,
1123 "Enter passphrase for key '%.100s': ", filename);
1124 for (i = 0; i < options.number_of_password_prompts; i++) {
1125 passphrase = read_passphrase(prompt, 0); 1125 passphrase = read_passphrase(prompt, 0);
1126 if (strcmp(passphrase, "") != 0) { 1126 if (*passphrase == '\0') {
1127 private = key_load_private_type(KEY_UNSPEC,
1128 filename, passphrase, NULL, NULL);
1129 quit = 0;
1130 } else {
1131 debug2("no passphrase given, try next key"); 1127 debug2("no passphrase given, try next key");
1128 free(passphrase);
1129 break;
1130 }
1131 }
1132 switch ((r = sshkey_load_private_type(KEY_UNSPEC, filename,
1133 passphrase, &private, NULL, &perm_ok))) {
1134 case 0:
1135 break;
1136 case SSH_ERR_KEY_WRONG_PASSPHRASE:
1137 if (options.batch_mode) {
1138 quit = 1;
1139 break;
1140 }
1141 debug2("bad passphrase given, try again...");
1142 break;
1143 case SSH_ERR_SYSTEM_ERROR:
1144 if (errno == ENOENT) {
1145 debug2("Load key \"%s\": %s",
1146 filename, ssh_err(r));
1132 quit = 1; 1147 quit = 1;
1148 break;
1133 } 1149 }
1150 /* FALLTHROUGH */
1151 default:
1152 error("Load key \"%s\": %s", filename, ssh_err(r));
1153 quit = 1;
1154 break;
1155 }
1156 if (i > 0) {
1134 explicit_bzero(passphrase, strlen(passphrase)); 1157 explicit_bzero(passphrase, strlen(passphrase));
1135 free(passphrase); 1158 free(passphrase);
1136 if (private != NULL || quit)
1137 break;
1138 debug2("bad passphrase given, try again...");
1139 } 1159 }
1160 if (private != NULL || quit)
1161 break;
1140 } 1162 }
1141 return private; 1163 return private;
1142} 1164}
@@ -1150,12 +1172,12 @@ load_identity_file(char *filename, int userprovided)
1150static void 1172static void
1151pubkey_prepare(Authctxt *authctxt) 1173pubkey_prepare(Authctxt *authctxt)
1152{ 1174{
1153 Identity *id, *id2, *tmp; 1175 struct identity *id, *id2, *tmp;
1154 Idlist agent, files, *preferred; 1176 struct idlist agent, files, *preferred;
1155 Key *key; 1177 struct sshkey *key;
1156 AuthenticationConnection *ac; 1178 int agent_fd, i, r, found;
1157 char *comment; 1179 size_t j;
1158 int i, found; 1180 struct ssh_identitylist *idlist;
1159 1181
1160 TAILQ_INIT(&agent); /* keys from the agent */ 1182 TAILQ_INIT(&agent); /* keys from the agent */
1161 TAILQ_INIT(&files); /* keys from the config file */ 1183 TAILQ_INIT(&files); /* keys from the config file */
@@ -1185,7 +1207,7 @@ pubkey_prepare(Authctxt *authctxt)
1185 if (id2->key == NULL || 1207 if (id2->key == NULL ||
1186 (id2->key->flags & SSHKEY_FLAG_EXT) == 0) 1208 (id2->key->flags & SSHKEY_FLAG_EXT) == 0)
1187 continue; 1209 continue;
1188 if (key_equal(id->key, id2->key)) { 1210 if (sshkey_equal(id->key, id2->key)) {
1189 TAILQ_REMOVE(&files, id, next); 1211 TAILQ_REMOVE(&files, id, next);
1190 TAILQ_INSERT_TAIL(preferred, id, next); 1212 TAILQ_INSERT_TAIL(preferred, id, next);
1191 found = 1; 1213 found = 1;
@@ -1200,37 +1222,48 @@ pubkey_prepare(Authctxt *authctxt)
1200 } 1222 }
1201 } 1223 }
1202 /* list of keys supported by the agent */ 1224 /* list of keys supported by the agent */
1203 if ((ac = ssh_get_authentication_connection())) { 1225 if ((r = ssh_get_authentication_socket(&agent_fd)) != 0) {
1204 for (key = ssh_get_first_identity(ac, &comment, 2); 1226 if (r != SSH_ERR_AGENT_NOT_PRESENT)
1205 key != NULL; 1227 debug("%s: ssh_get_authentication_socket: %s",
1206 key = ssh_get_next_identity(ac, &comment, 2)) { 1228 __func__, ssh_err(r));
1229 } else if ((r = ssh_fetch_identitylist(agent_fd, 2, &idlist)) != 0) {
1230 if (r != SSH_ERR_AGENT_NO_IDENTITIES)
1231 debug("%s: ssh_fetch_identitylist: %s",
1232 __func__, ssh_err(r));
1233 } else {
1234 for (j = 0; j < idlist->nkeys; j++) {
1207 found = 0; 1235 found = 0;
1208 TAILQ_FOREACH(id, &files, next) { 1236 TAILQ_FOREACH(id, &files, next) {
1209 /* agent keys from the config file are preferred */ 1237 /*
1210 if (key_equal(key, id->key)) { 1238 * agent keys from the config file are
1211 key_free(key); 1239 * preferred
1212 free(comment); 1240 */
1241 if (sshkey_equal(idlist->keys[j], id->key)) {
1213 TAILQ_REMOVE(&files, id, next); 1242 TAILQ_REMOVE(&files, id, next);
1214 TAILQ_INSERT_TAIL(preferred, id, next); 1243 TAILQ_INSERT_TAIL(preferred, id, next);
1215 id->ac = ac; 1244 id->agent_fd = agent_fd;
1216 found = 1; 1245 found = 1;
1217 break; 1246 break;
1218 } 1247 }
1219 } 1248 }
1220 if (!found && !options.identities_only) { 1249 if (!found && !options.identities_only) {
1221 id = xcalloc(1, sizeof(*id)); 1250 id = xcalloc(1, sizeof(*id));
1222 id->key = key; 1251 /* XXX "steals" key/comment from idlist */
1223 id->filename = comment; 1252 id->key = idlist->keys[j];
1224 id->ac = ac; 1253 id->filename = idlist->comments[j];
1254 idlist->keys[j] = NULL;
1255 idlist->comments[j] = NULL;
1256 id->agent_fd = agent_fd;
1225 TAILQ_INSERT_TAIL(&agent, id, next); 1257 TAILQ_INSERT_TAIL(&agent, id, next);
1226 } 1258 }
1227 } 1259 }
1260 ssh_free_identitylist(idlist);
1228 /* append remaining agent keys */ 1261 /* append remaining agent keys */
1229 for (id = TAILQ_FIRST(&agent); id; id = TAILQ_FIRST(&agent)) { 1262 for (id = TAILQ_FIRST(&agent); id; id = TAILQ_FIRST(&agent)) {
1230 TAILQ_REMOVE(&agent, id, next); 1263 TAILQ_REMOVE(&agent, id, next);
1231 TAILQ_INSERT_TAIL(preferred, id, next); 1264 TAILQ_INSERT_TAIL(preferred, id, next);
1232 } 1265 }
1233 authctxt->agent = ac; 1266 authctxt->agent_fd = agent_fd;
1234 } 1267 }
1235 /* append remaining keys from the config file */ 1268 /* append remaining keys from the config file */
1236 for (id = TAILQ_FIRST(&files); id; id = TAILQ_FIRST(&files)) { 1269 for (id = TAILQ_FIRST(&files); id; id = TAILQ_FIRST(&files)) {
@@ -1248,13 +1281,13 @@ pubkey_cleanup(Authctxt *authctxt)
1248{ 1281{
1249 Identity *id; 1282 Identity *id;
1250 1283
1251 if (authctxt->agent != NULL) 1284 if (authctxt->agent_fd != -1)
1252 ssh_close_authentication_connection(authctxt->agent); 1285 ssh_close_authentication_socket(authctxt->agent_fd);
1253 for (id = TAILQ_FIRST(&authctxt->keys); id; 1286 for (id = TAILQ_FIRST(&authctxt->keys); id;
1254 id = TAILQ_FIRST(&authctxt->keys)) { 1287 id = TAILQ_FIRST(&authctxt->keys)) {
1255 TAILQ_REMOVE(&authctxt->keys, id, next); 1288 TAILQ_REMOVE(&authctxt->keys, id, next);
1256 if (id->key) 1289 if (id->key)
1257 key_free(id->key); 1290 sshkey_free(id->key);
1258 free(id->filename); 1291 free(id->filename);
1259 free(id); 1292 free(id);
1260 } 1293 }
diff --git a/sshd.c b/sshd.c
index 202e1706f..4f97da820 100644
--- a/sshd.c
+++ b/sshd.c
@@ -1,4 +1,4 @@
1/* $OpenBSD: sshd.c,v 1.431 2015/01/07 18:15:07 tedu Exp $ */ 1/* $OpenBSD: sshd.c,v 1.432 2015/01/14 20:05:27 djm Exp $ */
2/* 2/*
3 * Author: Tatu Ylonen <ylo@cs.hut.fi> 3 * Author: Tatu Ylonen <ylo@cs.hut.fi>
4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 4 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -123,6 +123,7 @@
123#include "roaming.h" 123#include "roaming.h"
124#include "ssh-sandbox.h" 124#include "ssh-sandbox.h"
125#include "version.h" 125#include "version.h"
126#include "ssherr.h"
126 127
127#ifndef O_NOCTTY 128#ifndef O_NOCTTY
128#define O_NOCTTY 0 129#define O_NOCTTY 0
@@ -191,7 +192,7 @@ char *server_version_string = NULL;
191Kex *xxx_kex; 192Kex *xxx_kex;
192 193
193/* Daemon's agent connection */ 194/* Daemon's agent connection */
194AuthenticationConnection *auth_conn = NULL; 195int auth_sock = -1;
195int have_agent = 0; 196int have_agent = 0;
196 197
197/* 198/*
@@ -655,7 +656,7 @@ privsep_preauth_child(void)
655static int 656static int
656privsep_preauth(Authctxt *authctxt) 657privsep_preauth(Authctxt *authctxt)
657{ 658{
658 int status; 659 int status, r;
659 pid_t pid; 660 pid_t pid;
660 struct ssh_sandbox *box = NULL; 661 struct ssh_sandbox *box = NULL;
661 662
@@ -673,8 +674,14 @@ privsep_preauth(Authctxt *authctxt)
673 debug2("Network child is on pid %ld", (long)pid); 674 debug2("Network child is on pid %ld", (long)pid);
674 675
675 pmonitor->m_pid = pid; 676 pmonitor->m_pid = pid;
676 if (have_agent) 677 if (have_agent) {
677 auth_conn = ssh_get_authentication_connection(); 678 r = ssh_get_authentication_socket(&auth_sock);
679 if (r != 0) {
680 error("Could not get agent socket: %s",
681 ssh_err(r));
682 have_agent = 0;
683 }
684 }
678 if (box != NULL) 685 if (box != NULL)
679 ssh_sandbox_parent_preauth(box, pid); 686 ssh_sandbox_parent_preauth(box, pid);
680 monitor_child_preauth(authctxt, pmonitor); 687 monitor_child_preauth(authctxt, pmonitor);
@@ -1397,7 +1404,7 @@ main(int ac, char **av)
1397{ 1404{
1398 extern char *optarg; 1405 extern char *optarg;
1399 extern int optind; 1406 extern int optind;
1400 int opt, i, j, on = 1; 1407 int r, opt, i, j, on = 1;
1401 int sock_in = -1, sock_out = -1, newsock = -1; 1408 int sock_in = -1, sock_out = -1, newsock = -1;
1402 const char *remote_ip; 1409 const char *remote_ip;
1403 int remote_port; 1410 int remote_port;
@@ -1706,7 +1713,7 @@ main(int ac, char **av)
1706 if (strcmp(options.host_key_agent, SSH_AUTHSOCKET_ENV_NAME)) 1713 if (strcmp(options.host_key_agent, SSH_AUTHSOCKET_ENV_NAME))
1707 setenv(SSH_AUTHSOCKET_ENV_NAME, 1714 setenv(SSH_AUTHSOCKET_ENV_NAME,
1708 options.host_key_agent, 1); 1715 options.host_key_agent, 1);
1709 have_agent = ssh_agent_present(); 1716 have_agent = ssh_get_authentication_socket(NULL);
1710 } 1717 }
1711 1718
1712 for (i = 0; i < options.num_host_key_files; i++) { 1719 for (i = 0; i < options.num_host_key_files; i++) {
@@ -2103,8 +2110,12 @@ main(int ac, char **av)
2103 if (use_privsep) { 2110 if (use_privsep) {
2104 if (privsep_preauth(authctxt) == 1) 2111 if (privsep_preauth(authctxt) == 1)
2105 goto authenticated; 2112 goto authenticated;
2106 } else if (compat20 && have_agent) 2113 } else if (compat20 && have_agent) {
2107 auth_conn = ssh_get_authentication_connection(); 2114 if ((r = ssh_get_authentication_socket(&auth_sock)) != 0) {
2115 error("Unable to get agent socket: %s", ssh_err(r));
2116 have_agent = -1;
2117 }
2118 }
2108 2119
2109 /* perform the key exchange */ 2120 /* perform the key exchange */
2110 /* authenticate user and start session */ 2121 /* authenticate user and start session */
@@ -2425,6 +2436,8 @@ void
2425sshd_hostkey_sign(Key *privkey, Key *pubkey, u_char **signature, u_int *slen, 2436sshd_hostkey_sign(Key *privkey, Key *pubkey, u_char **signature, u_int *slen,
2426 u_char *data, u_int dlen) 2437 u_char *data, u_int dlen)
2427{ 2438{
2439 int r;
2440
2428 if (privkey) { 2441 if (privkey) {
2429 if (PRIVSEP(key_sign(privkey, signature, slen, data, dlen) < 0)) 2442 if (PRIVSEP(key_sign(privkey, signature, slen, data, dlen) < 0))
2430 fatal("%s: key_sign failed", __func__); 2443 fatal("%s: key_sign failed", __func__);
@@ -2432,9 +2445,15 @@ sshd_hostkey_sign(Key *privkey, Key *pubkey, u_char **signature, u_int *slen,
2432 if (mm_key_sign(pubkey, signature, slen, data, dlen) < 0) 2445 if (mm_key_sign(pubkey, signature, slen, data, dlen) < 0)
2433 fatal("%s: pubkey_sign failed", __func__); 2446 fatal("%s: pubkey_sign failed", __func__);
2434 } else { 2447 } else {
2435 if (ssh_agent_sign(auth_conn, pubkey, signature, slen, data, 2448 size_t xxx_slen;
2436 dlen)) 2449
2437 fatal("%s: ssh_agent_sign failed", __func__); 2450 if ((r = ssh_agent_sign(auth_sock, pubkey, signature, &xxx_slen,
2451 data, dlen, datafellows)) != 0)
2452 fatal("%s: ssh_agent_sign failed: %s",
2453 __func__, ssh_err(r));
2454 /* XXX: Old API is u_int; new size_t */
2455 if (slen != NULL)
2456 *slen = xxx_slen;
2438 } 2457 }
2439} 2458}
2440 2459
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 20:51:32 +0000