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d02b48c6 | 1 | /* ssl/s3_srvr.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
8 | * | |
9 | * This library is free for commercial and non-commercial use as long as | |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
15 | * | |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in | |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
52 | * | |
53 | * The licence and distribution terms for any publically available version or | |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
58 | ||
59 | #define REUSE_CIPHER_BUG | |
de469ef2 DSH |
60 | #define NETSCAPE_HANG_BUG |
61 | ||
d02b48c6 RE |
62 | |
63 | #include <stdio.h> | |
ec577822 BM |
64 | #include <openssl/buffer.h> |
65 | #include <openssl/rand.h> | |
66 | #include <openssl/objects.h> | |
d02f751c UM |
67 | #include <openssl/md5.h> |
68 | #include <openssl/sha.h> | |
ec577822 BM |
69 | #include <openssl/evp.h> |
70 | #include <openssl/x509.h> | |
d02b48c6 RE |
71 | #include "ssl_locl.h" |
72 | ||
9b3086fe | 73 | static SSL_METHOD *ssl3_get_server_method(int ver); |
d02b48c6 | 74 | static int ssl3_get_client_hello(SSL *s); |
3d14b9d0 | 75 | static int ssl3_check_client_hello(SSL *s); |
d02b48c6 RE |
76 | static int ssl3_send_server_hello(SSL *s); |
77 | static int ssl3_send_server_key_exchange(SSL *s); | |
78 | static int ssl3_send_certificate_request(SSL *s); | |
79 | static int ssl3_send_server_done(SSL *s); | |
d02b48c6 RE |
80 | static int ssl3_get_client_key_exchange(SSL *s); |
81 | static int ssl3_get_client_certificate(SSL *s); | |
a2a01589 | 82 | static int ssl3_get_cert_verify(SSL *s); |
d02b48c6 RE |
83 | static int ssl3_send_hello_request(SSL *s); |
84 | ||
6b691a5c | 85 | static SSL_METHOD *ssl3_get_server_method(int ver) |
d02b48c6 | 86 | { |
58964a49 | 87 | if (ver == SSL3_VERSION) |
d02b48c6 RE |
88 | return(SSLv3_server_method()); |
89 | else | |
90 | return(NULL); | |
91 | } | |
92 | ||
6b691a5c | 93 | SSL_METHOD *SSLv3_server_method(void) |
d02b48c6 RE |
94 | { |
95 | static int init=1; | |
96 | static SSL_METHOD SSLv3_server_data; | |
97 | ||
98 | if (init) | |
99 | { | |
d02b48c6 RE |
100 | memcpy((char *)&SSLv3_server_data,(char *)sslv3_base_method(), |
101 | sizeof(SSL_METHOD)); | |
102 | SSLv3_server_data.ssl_accept=ssl3_accept; | |
103 | SSLv3_server_data.get_ssl_method=ssl3_get_server_method; | |
5cc146f3 | 104 | init=0; |
d02b48c6 RE |
105 | } |
106 | return(&SSLv3_server_data); | |
107 | } | |
108 | ||
6b691a5c | 109 | int ssl3_accept(SSL *s) |
d02b48c6 RE |
110 | { |
111 | BUF_MEM *buf; | |
112 | unsigned long l,Time=time(NULL); | |
113 | void (*cb)()=NULL; | |
114 | long num1; | |
115 | int ret= -1; | |
d02b48c6 RE |
116 | int new_state,state,skip=0; |
117 | ||
eb952088 | 118 | RAND_add(&Time,sizeof(Time),0); |
d02b48c6 | 119 | ERR_clear_error(); |
58964a49 | 120 | clear_sys_error(); |
d02b48c6 RE |
121 | |
122 | if (s->info_callback != NULL) | |
123 | cb=s->info_callback; | |
124 | else if (s->ctx->info_callback != NULL) | |
125 | cb=s->ctx->info_callback; | |
126 | ||
127 | /* init things to blank */ | |
128 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); | |
129 | s->in_handshake++; | |
130 | ||
b56bce4f | 131 | if (s->cert == NULL) |
d02b48c6 RE |
132 | { |
133 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET); | |
b56bce4f | 134 | return(-1); |
d02b48c6 | 135 | } |
d02b48c6 RE |
136 | |
137 | for (;;) | |
138 | { | |
139 | state=s->state; | |
140 | ||
141 | switch (s->state) | |
142 | { | |
143 | case SSL_ST_RENEGOTIATE: | |
144 | s->new_session=1; | |
145 | /* s->state=SSL_ST_ACCEPT; */ | |
146 | ||
147 | case SSL_ST_BEFORE: | |
148 | case SSL_ST_ACCEPT: | |
149 | case SSL_ST_BEFORE|SSL_ST_ACCEPT: | |
150 | case SSL_ST_OK|SSL_ST_ACCEPT: | |
151 | ||
413c4f45 | 152 | s->server=1; |
d02b48c6 RE |
153 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
154 | ||
58964a49 RE |
155 | if ((s->version>>8) != 3) |
156 | abort(); | |
d02b48c6 RE |
157 | s->type=SSL_ST_ACCEPT; |
158 | ||
159 | if (s->init_buf == NULL) | |
160 | { | |
161 | if ((buf=BUF_MEM_new()) == NULL) | |
162 | { | |
163 | ret= -1; | |
164 | goto end; | |
165 | } | |
166 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
167 | { | |
168 | ret= -1; | |
169 | goto end; | |
170 | } | |
171 | s->init_buf=buf; | |
172 | } | |
173 | ||
174 | if (!ssl3_setup_buffers(s)) | |
175 | { | |
176 | ret= -1; | |
177 | goto end; | |
178 | } | |
179 | ||
180 | /* Ok, we now need to push on a buffering BIO so that | |
181 | * the output is sent in a way that TCP likes :-) | |
182 | */ | |
58964a49 | 183 | if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } |
d02b48c6 | 184 | |
d02b48c6 RE |
185 | s->init_num=0; |
186 | ||
187 | if (s->state != SSL_ST_RENEGOTIATE) | |
188 | { | |
745c70e5 | 189 | ssl3_init_finished_mac(s); |
d02b48c6 | 190 | s->state=SSL3_ST_SR_CLNT_HELLO_A; |
413c4f45 | 191 | s->ctx->stats.sess_accept++; |
d02b48c6 RE |
192 | } |
193 | else | |
194 | { | |
413c4f45 | 195 | s->ctx->stats.sess_accept_renegotiate++; |
d02b48c6 RE |
196 | s->state=SSL3_ST_SW_HELLO_REQ_A; |
197 | } | |
198 | break; | |
199 | ||
200 | case SSL3_ST_SW_HELLO_REQ_A: | |
201 | case SSL3_ST_SW_HELLO_REQ_B: | |
202 | ||
203 | s->shutdown=0; | |
204 | ret=ssl3_send_hello_request(s); | |
205 | if (ret <= 0) goto end; | |
206 | s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C; | |
207 | s->state=SSL3_ST_SW_FLUSH; | |
208 | s->init_num=0; | |
209 | ||
210 | ssl3_init_finished_mac(s); | |
211 | break; | |
212 | ||
213 | case SSL3_ST_SW_HELLO_REQ_C: | |
d02b48c6 RE |
214 | s->state=SSL_ST_OK; |
215 | ret=1; | |
216 | goto end; | |
58964a49 | 217 | /* break; */ |
d02b48c6 RE |
218 | |
219 | case SSL3_ST_SR_CLNT_HELLO_A: | |
220 | case SSL3_ST_SR_CLNT_HELLO_B: | |
221 | case SSL3_ST_SR_CLNT_HELLO_C: | |
222 | ||
223 | s->shutdown=0; | |
224 | ret=ssl3_get_client_hello(s); | |
225 | if (ret <= 0) goto end; | |
226 | s->state=SSL3_ST_SW_SRVR_HELLO_A; | |
227 | s->init_num=0; | |
228 | break; | |
229 | ||
230 | case SSL3_ST_SW_SRVR_HELLO_A: | |
231 | case SSL3_ST_SW_SRVR_HELLO_B: | |
232 | ret=ssl3_send_server_hello(s); | |
233 | if (ret <= 0) goto end; | |
234 | ||
235 | if (s->hit) | |
236 | s->state=SSL3_ST_SW_CHANGE_A; | |
237 | else | |
238 | s->state=SSL3_ST_SW_CERT_A; | |
239 | s->init_num=0; | |
240 | break; | |
241 | ||
242 | case SSL3_ST_SW_CERT_A: | |
243 | case SSL3_ST_SW_CERT_B: | |
244 | /* Check if it is anon DH */ | |
245 | if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) | |
246 | { | |
247 | ret=ssl3_send_server_certificate(s); | |
248 | if (ret <= 0) goto end; | |
249 | } | |
250 | else | |
251 | skip=1; | |
252 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
253 | s->init_num=0; | |
254 | break; | |
255 | ||
256 | case SSL3_ST_SW_KEY_EXCH_A: | |
257 | case SSL3_ST_SW_KEY_EXCH_B: | |
258 | l=s->s3->tmp.new_cipher->algorithms; | |
d02b48c6 RE |
259 | |
260 | /* clear this, it may get reset by | |
261 | * send_server_key_exchange */ | |
58964a49 | 262 | if (s->options & SSL_OP_EPHEMERAL_RSA) |
d02b48c6 RE |
263 | s->s3->tmp.use_rsa_tmp=1; |
264 | else | |
265 | s->s3->tmp.use_rsa_tmp=0; | |
266 | ||
267 | /* only send if a DH key exchange, fortezza or | |
268 | * RSA but we have a sign only certificate */ | |
06ab81f9 BL |
269 | if (s->s3->tmp.use_rsa_tmp |
270 | || (l & (SSL_DH|SSL_kFZA)) | |
271 | || ((l & SSL_kRSA) | |
b56bce4f | 272 | && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL |
018e57c7 DSH |
273 | || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) |
274 | && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher) | |
06ab81f9 BL |
275 | ) |
276 | ) | |
277 | ) | |
d02b48c6 | 278 | ) |
d02b48c6 RE |
279 | { |
280 | ret=ssl3_send_server_key_exchange(s); | |
281 | if (ret <= 0) goto end; | |
282 | } | |
283 | else | |
284 | skip=1; | |
285 | ||
286 | s->state=SSL3_ST_SW_CERT_REQ_A; | |
287 | s->init_num=0; | |
288 | break; | |
289 | ||
290 | case SSL3_ST_SW_CERT_REQ_A: | |
291 | case SSL3_ST_SW_CERT_REQ_B: | |
47134b78 BM |
292 | if (/* don't request cert unless asked for it: */ |
293 | !(s->verify_mode & SSL_VERIFY_PEER) || | |
294 | /* if SSL_VERIFY_CLIENT_ONCE is set, | |
295 | * don't request cert during re-negotiation: */ | |
d02b48c6 | 296 | ((s->session->peer != NULL) && |
47134b78 BM |
297 | (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) || |
298 | /* never request cert in anonymous ciphersuites | |
299 | * (see section "Certificate request" in SSL 3 drafts | |
300 | * and in RFC 2246): */ | |
301 | ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) && | |
302 | /* ... except when the application insists on verification | |
303 | * (against the specs, but s3_clnt.c accepts this for SSL 3) */ | |
304 | !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT))) | |
d02b48c6 RE |
305 | { |
306 | /* no cert request */ | |
307 | skip=1; | |
58964a49 | 308 | s->s3->tmp.cert_request=0; |
d02b48c6 RE |
309 | s->state=SSL3_ST_SW_SRVR_DONE_A; |
310 | } | |
311 | else | |
312 | { | |
58964a49 | 313 | s->s3->tmp.cert_request=1; |
d02b48c6 RE |
314 | ret=ssl3_send_certificate_request(s); |
315 | if (ret <= 0) goto end; | |
de469ef2 | 316 | #ifndef NETSCAPE_HANG_BUG |
d02b48c6 | 317 | s->state=SSL3_ST_SW_SRVR_DONE_A; |
de469ef2 DSH |
318 | #else |
319 | s->state=SSL3_ST_SW_FLUSH; | |
320 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
321 | #endif | |
d02b48c6 RE |
322 | s->init_num=0; |
323 | } | |
324 | break; | |
325 | ||
326 | case SSL3_ST_SW_SRVR_DONE_A: | |
327 | case SSL3_ST_SW_SRVR_DONE_B: | |
328 | ret=ssl3_send_server_done(s); | |
329 | if (ret <= 0) goto end; | |
330 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
331 | s->state=SSL3_ST_SW_FLUSH; | |
332 | s->init_num=0; | |
333 | break; | |
334 | ||
335 | case SSL3_ST_SW_FLUSH: | |
336 | /* number of bytes to be flushed */ | |
337 | num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL); | |
338 | if (num1 > 0) | |
339 | { | |
340 | s->rwstate=SSL_WRITING; | |
341 | num1=BIO_flush(s->wbio); | |
342 | if (num1 <= 0) { ret= -1; goto end; } | |
343 | s->rwstate=SSL_NOTHING; | |
344 | } | |
345 | ||
346 | s->state=s->s3->tmp.next_state; | |
347 | break; | |
348 | ||
349 | case SSL3_ST_SR_CERT_A: | |
350 | case SSL3_ST_SR_CERT_B: | |
745c70e5 | 351 | /* Check for second client hello (MS SGC) */ |
3d14b9d0 | 352 | ret = ssl3_check_client_hello(s); |
745c70e5 BM |
353 | if (ret <= 0) |
354 | goto end; | |
355 | if (ret == 2) | |
356 | s->state = SSL3_ST_SR_CLNT_HELLO_C; | |
3d14b9d0 DSH |
357 | else { |
358 | /* could be sent for a DH cert, even if we | |
359 | * have not asked for it :-) */ | |
360 | ret=ssl3_get_client_certificate(s); | |
361 | if (ret <= 0) goto end; | |
362 | s->init_num=0; | |
363 | s->state=SSL3_ST_SR_KEY_EXCH_A; | |
364 | } | |
d02b48c6 RE |
365 | break; |
366 | ||
367 | case SSL3_ST_SR_KEY_EXCH_A: | |
368 | case SSL3_ST_SR_KEY_EXCH_B: | |
369 | ret=ssl3_get_client_key_exchange(s); | |
370 | if (ret <= 0) goto end; | |
371 | s->state=SSL3_ST_SR_CERT_VRFY_A; | |
372 | s->init_num=0; | |
373 | ||
374 | /* We need to get hashes here so if there is | |
375 | * a client cert, it can be verified */ | |
58964a49 RE |
376 | s->method->ssl3_enc->cert_verify_mac(s, |
377 | &(s->s3->finish_dgst1), | |
f2d9a32c | 378 | &(s->s3->tmp.cert_verify_md[0])); |
58964a49 RE |
379 | s->method->ssl3_enc->cert_verify_mac(s, |
380 | &(s->s3->finish_dgst2), | |
f2d9a32c | 381 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH])); |
d02b48c6 RE |
382 | |
383 | break; | |
384 | ||
385 | case SSL3_ST_SR_CERT_VRFY_A: | |
386 | case SSL3_ST_SR_CERT_VRFY_B: | |
387 | ||
388 | /* we should decide if we expected this one */ | |
389 | ret=ssl3_get_cert_verify(s); | |
390 | if (ret <= 0) goto end; | |
391 | ||
392 | s->state=SSL3_ST_SR_FINISHED_A; | |
393 | s->init_num=0; | |
394 | break; | |
395 | ||
396 | case SSL3_ST_SR_FINISHED_A: | |
397 | case SSL3_ST_SR_FINISHED_B: | |
398 | ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, | |
58964a49 | 399 | SSL3_ST_SR_FINISHED_B); |
d02b48c6 RE |
400 | if (ret <= 0) goto end; |
401 | if (s->hit) | |
402 | s->state=SSL_ST_OK; | |
403 | else | |
404 | s->state=SSL3_ST_SW_CHANGE_A; | |
405 | s->init_num=0; | |
406 | break; | |
407 | ||
408 | case SSL3_ST_SW_CHANGE_A: | |
409 | case SSL3_ST_SW_CHANGE_B: | |
410 | ||
411 | s->session->cipher=s->s3->tmp.new_cipher; | |
58964a49 RE |
412 | if (!s->method->ssl3_enc->setup_key_block(s)) |
413 | { ret= -1; goto end; } | |
d02b48c6 RE |
414 | |
415 | ret=ssl3_send_change_cipher_spec(s, | |
416 | SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); | |
417 | ||
418 | if (ret <= 0) goto end; | |
419 | s->state=SSL3_ST_SW_FINISHED_A; | |
420 | s->init_num=0; | |
421 | ||
58964a49 | 422 | if (!s->method->ssl3_enc->change_cipher_state(s, |
d02b48c6 RE |
423 | SSL3_CHANGE_CIPHER_SERVER_WRITE)) |
424 | { | |
425 | ret= -1; | |
426 | goto end; | |
427 | } | |
428 | ||
429 | break; | |
430 | ||
431 | case SSL3_ST_SW_FINISHED_A: | |
432 | case SSL3_ST_SW_FINISHED_B: | |
433 | ret=ssl3_send_finished(s, | |
434 | SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B, | |
c44f7540 BM |
435 | s->method->ssl3_enc->server_finished_label, |
436 | s->method->ssl3_enc->server_finished_label_len); | |
d02b48c6 RE |
437 | if (ret <= 0) goto end; |
438 | s->state=SSL3_ST_SW_FLUSH; | |
439 | if (s->hit) | |
440 | s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; | |
441 | else | |
442 | s->s3->tmp.next_state=SSL_ST_OK; | |
443 | s->init_num=0; | |
444 | break; | |
445 | ||
446 | case SSL_ST_OK: | |
447 | /* clean a few things up */ | |
448 | ssl3_cleanup_key_block(s); | |
449 | ||
450 | BUF_MEM_free(s->init_buf); | |
451 | s->init_buf=NULL; | |
452 | ||
453 | /* remove buffering on output */ | |
413c4f45 | 454 | ssl_free_wbio_buffer(s); |
d02b48c6 RE |
455 | |
456 | s->new_session=0; | |
457 | s->init_num=0; | |
458 | ||
459 | ssl_update_cache(s,SSL_SESS_CACHE_SERVER); | |
460 | ||
413c4f45 | 461 | s->ctx->stats.sess_accept_good++; |
d02b48c6 RE |
462 | /* s->server=1; */ |
463 | s->handshake_func=ssl3_accept; | |
464 | ret=1; | |
465 | ||
466 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); | |
467 | ||
468 | goto end; | |
58964a49 | 469 | /* break; */ |
d02b48c6 RE |
470 | |
471 | default: | |
472 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE); | |
473 | ret= -1; | |
474 | goto end; | |
58964a49 | 475 | /* break; */ |
d02b48c6 RE |
476 | } |
477 | ||
478 | if (!s->s3->tmp.reuse_message && !skip) | |
479 | { | |
58964a49 RE |
480 | if (s->debug) |
481 | { | |
482 | if ((ret=BIO_flush(s->wbio)) <= 0) | |
483 | goto end; | |
484 | } | |
485 | ||
d02b48c6 RE |
486 | |
487 | if ((cb != NULL) && (s->state != state)) | |
488 | { | |
489 | new_state=s->state; | |
490 | s->state=state; | |
491 | cb(s,SSL_CB_ACCEPT_LOOP,1); | |
492 | s->state=new_state; | |
493 | } | |
494 | } | |
495 | skip=0; | |
496 | } | |
497 | end: | |
498 | /* BIO_flush(s->wbio); */ | |
499 | ||
500 | if (cb != NULL) | |
501 | cb(s,SSL_CB_ACCEPT_EXIT,ret); | |
502 | s->in_handshake--; | |
503 | return(ret); | |
504 | } | |
505 | ||
6b691a5c | 506 | static int ssl3_send_hello_request(SSL *s) |
d02b48c6 RE |
507 | { |
508 | unsigned char *p; | |
509 | ||
510 | if (s->state == SSL3_ST_SW_HELLO_REQ_A) | |
511 | { | |
512 | p=(unsigned char *)s->init_buf->data; | |
c51ae173 | 513 | *(p++)=SSL3_MT_HELLO_REQUEST; |
d02b48c6 RE |
514 | *(p++)=0; |
515 | *(p++)=0; | |
516 | *(p++)=0; | |
517 | ||
518 | s->state=SSL3_ST_SW_HELLO_REQ_B; | |
519 | /* number of bytes to write */ | |
520 | s->init_num=4; | |
521 | s->init_off=0; | |
522 | } | |
523 | ||
524 | /* SSL3_ST_SW_HELLO_REQ_B */ | |
525 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
526 | } | |
527 | ||
3d14b9d0 DSH |
528 | static int ssl3_check_client_hello(SSL *s) |
529 | { | |
530 | int ok; | |
531 | long n; | |
532 | ||
533 | n=ssl3_get_message(s, | |
534 | SSL3_ST_SR_CERT_A, | |
535 | SSL3_ST_SR_CERT_B, | |
536 | -1, | |
537 | SSL3_RT_MAX_PLAIN_LENGTH, | |
538 | &ok); | |
539 | if (!ok) return((int)n); | |
540 | s->s3->tmp.reuse_message = 1; | |
a2a01589 BM |
541 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO) |
542 | { | |
543 | /* Throw away what we have done so far in the current handshake, | |
544 | * which will now be aborted. (A full SSL_clear would be too much.) | |
545 | * I hope that tmp.dh is the only thing that may need to be cleared | |
546 | * when a handshake is not completed ... */ | |
547 | #ifndef NO_DH | |
548 | if (s->s3->tmp.dh != NULL) | |
549 | { | |
550 | DH_free(s->s3->tmp.dh); | |
551 | s->s3->tmp.dh = NULL; | |
552 | } | |
553 | #endif | |
554 | return 2; | |
555 | } | |
3d14b9d0 DSH |
556 | return 1; |
557 | } | |
558 | ||
6b691a5c | 559 | static int ssl3_get_client_hello(SSL *s) |
d02b48c6 RE |
560 | { |
561 | int i,j,ok,al,ret= -1; | |
562 | long n; | |
563 | unsigned long id; | |
413c4f45 | 564 | unsigned char *p,*d,*q; |
d02b48c6 | 565 | SSL_CIPHER *c; |
413c4f45 | 566 | SSL_COMP *comp=NULL; |
f73e07cf | 567 | STACK_OF(SSL_CIPHER) *ciphers=NULL; |
d02b48c6 | 568 | |
58964a49 RE |
569 | /* We do this so that we will respond with our native type. |
570 | * If we are TLSv1 and we get SSLv3, we will respond with TLSv1, | |
571 | * This down switching should be handled by a different method. | |
572 | * If we are SSLv3, we will respond with SSLv3, even if prompted with | |
573 | * TLSv1. | |
574 | */ | |
d02b48c6 RE |
575 | if (s->state == SSL3_ST_SR_CLNT_HELLO_A) |
576 | { | |
577 | s->first_packet=1; | |
578 | s->state=SSL3_ST_SR_CLNT_HELLO_B; | |
579 | } | |
580 | n=ssl3_get_message(s, | |
581 | SSL3_ST_SR_CLNT_HELLO_B, | |
582 | SSL3_ST_SR_CLNT_HELLO_C, | |
583 | SSL3_MT_CLIENT_HELLO, | |
584 | SSL3_RT_MAX_PLAIN_LENGTH, | |
585 | &ok); | |
586 | ||
587 | if (!ok) return((int)n); | |
588 | d=p=(unsigned char *)s->init_buf->data; | |
589 | ||
074309b7 BM |
590 | /* use version from inside client hello, not from record header |
591 | * (may differ: see RFC 2246, Appendix E, second paragraph) */ | |
592 | s->client_version=(((int)p[0])<<8)|(int)p[1]; | |
d02b48c6 RE |
593 | p+=2; |
594 | ||
595 | /* load the client random */ | |
596 | memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE); | |
597 | p+=SSL3_RANDOM_SIZE; | |
598 | ||
599 | /* get the session-id */ | |
600 | j= *(p++); | |
601 | ||
602 | s->hit=0; | |
603 | if (j == 0) | |
604 | { | |
605 | if (!ssl_get_new_session(s,1)) | |
606 | goto err; | |
607 | } | |
608 | else | |
609 | { | |
58964a49 | 610 | i=ssl_get_prev_session(s,p,j); |
d02b48c6 RE |
611 | if (i == 1) |
612 | { /* previous session */ | |
613 | s->hit=1; | |
614 | } | |
8876bc05 BM |
615 | else if (i == -1) |
616 | goto err; | |
617 | else /* i == 0 */ | |
d02b48c6 RE |
618 | { |
619 | if (!ssl_get_new_session(s,1)) | |
620 | goto err; | |
621 | } | |
622 | } | |
623 | ||
624 | p+=j; | |
625 | n2s(p,i); | |
626 | if ((i == 0) && (j != 0)) | |
627 | { | |
628 | /* we need a cipher if we are not resuming a session */ | |
58964a49 | 629 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
630 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED); |
631 | goto f_err; | |
632 | } | |
633 | if ((i+p) > (d+n)) | |
634 | { | |
635 | /* not enough data */ | |
58964a49 | 636 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
637 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); |
638 | goto f_err; | |
639 | } | |
640 | if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers)) | |
641 | == NULL)) | |
642 | { | |
643 | goto err; | |
644 | } | |
645 | p+=i; | |
646 | ||
647 | /* If it is a hit, check that the cipher is in the list */ | |
648 | if ((s->hit) && (i > 0)) | |
649 | { | |
650 | j=0; | |
651 | id=s->session->cipher->id; | |
652 | ||
413c4f45 MC |
653 | #ifdef CIPHER_DEBUG |
654 | printf("client sent %d ciphers\n",sk_num(ciphers)); | |
655 | #endif | |
f73e07cf | 656 | for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++) |
d02b48c6 | 657 | { |
f73e07cf | 658 | c=sk_SSL_CIPHER_value(ciphers,i); |
413c4f45 MC |
659 | #ifdef CIPHER_DEBUG |
660 | printf("client [%2d of %2d]:%s\n", | |
661 | i,sk_num(ciphers),SSL_CIPHER_get_name(c)); | |
662 | #endif | |
d02b48c6 RE |
663 | if (c->id == id) |
664 | { | |
665 | j=1; | |
666 | break; | |
667 | } | |
668 | } | |
669 | if (j == 0) | |
670 | { | |
f73e07cf | 671 | if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1)) |
d02b48c6 RE |
672 | { |
673 | /* Very bad for multi-threading.... */ | |
f73e07cf BL |
674 | s->session->cipher=sk_SSL_CIPHER_value(ciphers, |
675 | 0); | |
d02b48c6 RE |
676 | } |
677 | else | |
678 | { | |
679 | /* we need to have the cipher in the cipher | |
680 | * list if we are asked to reuse it */ | |
58964a49 | 681 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
682 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING); |
683 | goto f_err; | |
684 | } | |
685 | } | |
686 | } | |
687 | ||
688 | /* compression */ | |
689 | i= *(p++); | |
413c4f45 | 690 | q=p; |
d02b48c6 | 691 | for (j=0; j<i; j++) |
413c4f45 | 692 | { |
d02b48c6 | 693 | if (p[j] == 0) break; |
413c4f45 | 694 | } |
d02b48c6 RE |
695 | |
696 | p+=i; | |
697 | if (j >= i) | |
698 | { | |
699 | /* no compress */ | |
58964a49 | 700 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
701 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED); |
702 | goto f_err; | |
703 | } | |
704 | ||
413c4f45 MC |
705 | /* Worst case, we will use the NULL compression, but if we have other |
706 | * options, we will now look for them. We have i-1 compression | |
707 | * algorithms from the client, starting at q. */ | |
708 | s->s3->tmp.new_compression=NULL; | |
709 | if (s->ctx->comp_methods != NULL) | |
710 | { /* See if we have a match */ | |
711 | int m,nn,o,v,done=0; | |
712 | ||
f73e07cf | 713 | nn=sk_SSL_COMP_num(s->ctx->comp_methods); |
413c4f45 MC |
714 | for (m=0; m<nn; m++) |
715 | { | |
f73e07cf | 716 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,m); |
413c4f45 MC |
717 | v=comp->id; |
718 | for (o=0; o<i; o++) | |
719 | { | |
720 | if (v == q[o]) | |
721 | { | |
722 | done=1; | |
723 | break; | |
724 | } | |
725 | } | |
726 | if (done) break; | |
727 | } | |
728 | if (done) | |
729 | s->s3->tmp.new_compression=comp; | |
730 | else | |
731 | comp=NULL; | |
732 | } | |
733 | ||
58964a49 RE |
734 | /* TLS does not mind if there is extra stuff */ |
735 | if (s->version == SSL3_VERSION) | |
d02b48c6 | 736 | { |
58964a49 RE |
737 | if (p > (d+n)) |
738 | { | |
739 | /* wrong number of bytes, | |
740 | * there could be more to follow */ | |
741 | al=SSL_AD_DECODE_ERROR; | |
742 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); | |
743 | goto f_err; | |
744 | } | |
d02b48c6 RE |
745 | } |
746 | ||
d02b48c6 RE |
747 | /* Given s->session->ciphers and ssl_get_ciphers_by_id(s), we must |
748 | * pick a cipher */ | |
749 | ||
750 | if (!s->hit) | |
751 | { | |
413c4f45 | 752 | s->session->compress_meth=(comp == NULL)?0:comp->id; |
d02b48c6 | 753 | if (s->session->ciphers != NULL) |
f73e07cf | 754 | sk_SSL_CIPHER_free(s->session->ciphers); |
d02b48c6 RE |
755 | s->session->ciphers=ciphers; |
756 | if (ciphers == NULL) | |
757 | { | |
58964a49 | 758 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
759 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED); |
760 | goto f_err; | |
761 | } | |
762 | ciphers=NULL; | |
763 | c=ssl3_choose_cipher(s,s->session->ciphers, | |
f73e07cf | 764 | ssl_get_ciphers_by_id(s)); |
d02b48c6 RE |
765 | |
766 | if (c == NULL) | |
767 | { | |
58964a49 | 768 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
769 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER); |
770 | goto f_err; | |
771 | } | |
772 | s->s3->tmp.new_cipher=c; | |
773 | } | |
774 | else | |
775 | { | |
776 | /* Session-id reuse */ | |
777 | #ifdef REUSE_CIPHER_BUG | |
f73e07cf | 778 | STACK_OF(SSL_CIPHER) *sk; |
d02b48c6 RE |
779 | SSL_CIPHER *nc=NULL; |
780 | SSL_CIPHER *ec=NULL; | |
781 | ||
58964a49 | 782 | if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG) |
d02b48c6 RE |
783 | { |
784 | sk=s->session->ciphers; | |
f73e07cf | 785 | for (i=0; i<sk_SSL_CIPHER_num(sk); i++) |
d02b48c6 | 786 | { |
f73e07cf | 787 | c=sk_SSL_CIPHER_value(sk,i); |
d02b48c6 RE |
788 | if (c->algorithms & SSL_eNULL) |
789 | nc=c; | |
06ab81f9 | 790 | if (SSL_C_IS_EXPORT(c)) |
d02b48c6 RE |
791 | ec=c; |
792 | } | |
793 | if (nc != NULL) | |
794 | s->s3->tmp.new_cipher=nc; | |
795 | else if (ec != NULL) | |
796 | s->s3->tmp.new_cipher=ec; | |
797 | else | |
798 | s->s3->tmp.new_cipher=s->session->cipher; | |
799 | } | |
800 | else | |
801 | #endif | |
802 | s->s3->tmp.new_cipher=s->session->cipher; | |
803 | } | |
804 | ||
805 | /* we now have the following setup. | |
806 | * client_random | |
807 | * cipher_list - our prefered list of ciphers | |
808 | * ciphers - the clients prefered list of ciphers | |
809 | * compression - basically ignored right now | |
810 | * ssl version is set - sslv3 | |
811 | * s->session - The ssl session has been setup. | |
657e60fa | 812 | * s->hit - session reuse flag |
d02b48c6 RE |
813 | * s->tmp.new_cipher - the new cipher to use. |
814 | */ | |
815 | ||
816 | ret=1; | |
817 | if (0) | |
818 | { | |
819 | f_err: | |
820 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
821 | } | |
822 | err: | |
f73e07cf | 823 | if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers); |
d02b48c6 RE |
824 | return(ret); |
825 | } | |
826 | ||
6b691a5c | 827 | static int ssl3_send_server_hello(SSL *s) |
d02b48c6 RE |
828 | { |
829 | unsigned char *buf; | |
830 | unsigned char *p,*d; | |
831 | int i,sl; | |
832 | unsigned long l,Time; | |
833 | ||
834 | if (s->state == SSL3_ST_SW_SRVR_HELLO_A) | |
835 | { | |
836 | buf=(unsigned char *)s->init_buf->data; | |
837 | p=s->s3->server_random; | |
838 | Time=time(NULL); /* Time */ | |
839 | l2n(Time,p); | |
e7f97e2d | 840 | RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-sizeof(Time)); |
d02b48c6 RE |
841 | /* Do the message type and length last */ |
842 | d=p= &(buf[4]); | |
843 | ||
58964a49 RE |
844 | *(p++)=s->version>>8; |
845 | *(p++)=s->version&0xff; | |
d02b48c6 RE |
846 | |
847 | /* Random stuff */ | |
848 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
849 | p+=SSL3_RANDOM_SIZE; | |
850 | ||
851 | /* now in theory we have 3 options to sending back the | |
852 | * session id. If it is a re-use, we send back the | |
853 | * old session-id, if it is a new session, we send | |
854 | * back the new session-id or we send back a 0 length | |
855 | * session-id if we want it to be single use. | |
856 | * Currently I will not implement the '0' length session-id | |
58964a49 | 857 | * 12-Jan-98 - I'll now support the '0' length stuff. |
d02b48c6 | 858 | */ |
58964a49 RE |
859 | if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER)) |
860 | s->session->session_id_length=0; | |
d02b48c6 RE |
861 | |
862 | sl=s->session->session_id_length; | |
863 | *(p++)=sl; | |
864 | memcpy(p,s->session->session_id,sl); | |
865 | p+=sl; | |
866 | ||
867 | /* put the cipher */ | |
868 | i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p); | |
869 | p+=i; | |
870 | ||
871 | /* put the compression method */ | |
413c4f45 MC |
872 | if (s->s3->tmp.new_compression == NULL) |
873 | *(p++)=0; | |
874 | else | |
875 | *(p++)=s->s3->tmp.new_compression->id; | |
d02b48c6 RE |
876 | |
877 | /* do the header */ | |
878 | l=(p-d); | |
879 | d=buf; | |
880 | *(d++)=SSL3_MT_SERVER_HELLO; | |
881 | l2n3(l,d); | |
882 | ||
883 | s->state=SSL3_ST_CW_CLNT_HELLO_B; | |
884 | /* number of bytes to write */ | |
885 | s->init_num=p-buf; | |
886 | s->init_off=0; | |
887 | } | |
888 | ||
889 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
890 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
891 | } | |
892 | ||
6b691a5c | 893 | static int ssl3_send_server_done(SSL *s) |
d02b48c6 RE |
894 | { |
895 | unsigned char *p; | |
896 | ||
897 | if (s->state == SSL3_ST_SW_SRVR_DONE_A) | |
898 | { | |
899 | p=(unsigned char *)s->init_buf->data; | |
900 | ||
901 | /* do the header */ | |
902 | *(p++)=SSL3_MT_SERVER_DONE; | |
903 | *(p++)=0; | |
904 | *(p++)=0; | |
905 | *(p++)=0; | |
906 | ||
907 | s->state=SSL3_ST_SW_SRVR_DONE_B; | |
908 | /* number of bytes to write */ | |
909 | s->init_num=4; | |
910 | s->init_off=0; | |
911 | } | |
912 | ||
913 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
914 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
915 | } | |
916 | ||
6b691a5c | 917 | static int ssl3_send_server_key_exchange(SSL *s) |
d02b48c6 RE |
918 | { |
919 | #ifndef NO_RSA | |
920 | unsigned char *q; | |
921 | int j,num; | |
922 | RSA *rsa; | |
923 | unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
752d706a | 924 | unsigned int u; |
d02b48c6 RE |
925 | #endif |
926 | #ifndef NO_DH | |
9d1a01be | 927 | DH *dh=NULL,*dhp; |
d02b48c6 RE |
928 | #endif |
929 | EVP_PKEY *pkey; | |
930 | unsigned char *p,*d; | |
931 | int al,i; | |
932 | unsigned long type; | |
933 | int n; | |
934 | CERT *cert; | |
935 | BIGNUM *r[4]; | |
936 | int nr[4],kn; | |
937 | BUF_MEM *buf; | |
938 | EVP_MD_CTX md_ctx; | |
939 | ||
940 | if (s->state == SSL3_ST_SW_KEY_EXCH_A) | |
941 | { | |
942 | type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK; | |
b56bce4f | 943 | cert=s->cert; |
d02b48c6 RE |
944 | |
945 | buf=s->init_buf; | |
946 | ||
947 | r[0]=r[1]=r[2]=r[3]=NULL; | |
948 | n=0; | |
949 | #ifndef NO_RSA | |
950 | if (type & SSL_kRSA) | |
951 | { | |
952 | rsa=cert->rsa_tmp; | |
ca8e5b9b | 953 | if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) |
d02b48c6 | 954 | { |
ca8e5b9b | 955 | rsa=s->cert->rsa_tmp_cb(s, |
f415fa32 | 956 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 957 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
fbb41ae0 DSH |
958 | if(rsa == NULL) |
959 | { | |
960 | al=SSL_AD_HANDSHAKE_FAILURE; | |
961 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY); | |
962 | goto f_err; | |
963 | } | |
d02b48c6 RE |
964 | CRYPTO_add(&rsa->references,1,CRYPTO_LOCK_RSA); |
965 | cert->rsa_tmp=rsa; | |
966 | } | |
967 | if (rsa == NULL) | |
968 | { | |
58964a49 | 969 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
970 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY); |
971 | goto f_err; | |
972 | } | |
973 | r[0]=rsa->n; | |
974 | r[1]=rsa->e; | |
975 | s->s3->tmp.use_rsa_tmp=1; | |
976 | } | |
977 | else | |
978 | #endif | |
979 | #ifndef NO_DH | |
980 | if (type & SSL_kEDH) | |
981 | { | |
982 | dhp=cert->dh_tmp; | |
ca8e5b9b BM |
983 | if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL)) |
984 | dhp=s->cert->dh_tmp_cb(s, | |
2c05c494 | 985 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 986 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
d02b48c6 RE |
987 | if (dhp == NULL) |
988 | { | |
58964a49 | 989 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
990 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
991 | goto f_err; | |
992 | } | |
a87030a1 BM |
993 | |
994 | if (s->s3->tmp.dh != NULL) | |
995 | { | |
996 | DH_free(dh); | |
997 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, SSL_R_INTERNAL_ERROR); | |
998 | goto err; | |
999 | } | |
1000 | ||
d02b48c6 RE |
1001 | if ((dh=DHparams_dup(dhp)) == NULL) |
1002 | { | |
1003 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1004 | goto err; | |
1005 | } | |
1006 | ||
1007 | s->s3->tmp.dh=dh; | |
6fa89f94 BL |
1008 | if ((dhp->pub_key == NULL || |
1009 | dhp->priv_key == NULL || | |
1010 | (s->options & SSL_OP_SINGLE_DH_USE))) | |
d02b48c6 | 1011 | { |
6fa89f94 BL |
1012 | if(!DH_generate_key(dh)) |
1013 | { | |
1014 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, | |
1015 | ERR_R_DH_LIB); | |
1016 | goto err; | |
1017 | } | |
d02b48c6 RE |
1018 | } |
1019 | else | |
1020 | { | |
1021 | dh->pub_key=BN_dup(dhp->pub_key); | |
1022 | dh->priv_key=BN_dup(dhp->priv_key); | |
1023 | if ((dh->pub_key == NULL) || | |
1024 | (dh->priv_key == NULL)) | |
1025 | { | |
1026 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1027 | goto err; | |
1028 | } | |
1029 | } | |
1030 | r[0]=dh->p; | |
1031 | r[1]=dh->g; | |
1032 | r[2]=dh->pub_key; | |
1033 | } | |
1034 | else | |
1035 | #endif | |
1036 | { | |
58964a49 | 1037 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1038 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); |
1039 | goto f_err; | |
1040 | } | |
1041 | for (i=0; r[i] != NULL; i++) | |
1042 | { | |
1043 | nr[i]=BN_num_bytes(r[i]); | |
1044 | n+=2+nr[i]; | |
1045 | } | |
1046 | ||
1047 | if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) | |
1048 | { | |
1049 | if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher)) | |
1050 | == NULL) | |
1051 | { | |
58964a49 | 1052 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1053 | goto f_err; |
1054 | } | |
1055 | kn=EVP_PKEY_size(pkey); | |
1056 | } | |
1057 | else | |
1058 | { | |
1059 | pkey=NULL; | |
1060 | kn=0; | |
1061 | } | |
1062 | ||
1063 | if (!BUF_MEM_grow(buf,n+4+kn)) | |
1064 | { | |
1065 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF); | |
1066 | goto err; | |
1067 | } | |
1068 | d=(unsigned char *)s->init_buf->data; | |
1069 | p= &(d[4]); | |
1070 | ||
1071 | for (i=0; r[i] != NULL; i++) | |
1072 | { | |
1073 | s2n(nr[i],p); | |
1074 | BN_bn2bin(r[i],p); | |
1075 | p+=nr[i]; | |
1076 | } | |
1077 | ||
1078 | /* not anonymous */ | |
1079 | if (pkey != NULL) | |
1080 | { | |
1081 | /* n is the length of the params, they start at &(d[4]) | |
1082 | * and p points to the space at the end. */ | |
1083 | #ifndef NO_RSA | |
1084 | if (pkey->type == EVP_PKEY_RSA) | |
1085 | { | |
1086 | q=md_buf; | |
1087 | j=0; | |
1088 | for (num=2; num > 0; num--) | |
1089 | { | |
58964a49 RE |
1090 | EVP_DigestInit(&md_ctx,(num == 2) |
1091 | ?s->ctx->md5:s->ctx->sha1); | |
d02b48c6 RE |
1092 | EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
1093 | EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1094 | EVP_DigestUpdate(&md_ctx,&(d[4]),n); | |
1095 | EVP_DigestFinal(&md_ctx,q, | |
1096 | (unsigned int *)&i); | |
1097 | q+=i; | |
1098 | j+=i; | |
1099 | } | |
1c80019a | 1100 | if (RSA_sign(NID_md5_sha1, md_buf, j, |
ca7fea96 | 1101 | &(p[2]), &u, pkey->pkey.rsa) <= 0) |
d02b48c6 RE |
1102 | { |
1103 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA); | |
1104 | goto err; | |
1105 | } | |
ca7fea96 BL |
1106 | s2n(u,p); |
1107 | n+=u+2; | |
d02b48c6 RE |
1108 | } |
1109 | else | |
1110 | #endif | |
1111 | #if !defined(NO_DSA) | |
1112 | if (pkey->type == EVP_PKEY_DSA) | |
1113 | { | |
1114 | /* lets do DSS */ | |
1115 | EVP_SignInit(&md_ctx,EVP_dss1()); | |
1116 | EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); | |
1117 | EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1118 | EVP_SignUpdate(&md_ctx,&(d[4]),n); | |
1119 | if (!EVP_SignFinal(&md_ctx,&(p[2]), | |
1120 | (unsigned int *)&i,pkey)) | |
1121 | { | |
1122 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA); | |
1123 | goto err; | |
1124 | } | |
1125 | s2n(i,p); | |
1126 | n+=i+2; | |
1127 | } | |
1128 | else | |
1129 | #endif | |
1130 | { | |
1131 | /* Is this error check actually needed? */ | |
58964a49 | 1132 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1133 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE); |
1134 | goto f_err; | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE; | |
1139 | l2n3(n,d); | |
1140 | ||
1141 | /* we should now have things packed up, so lets send | |
1142 | * it off */ | |
1143 | s->init_num=n+4; | |
1144 | s->init_off=0; | |
1145 | } | |
1146 | ||
a87030a1 | 1147 | s->state = SSL3_ST_SW_KEY_EXCH_B; |
d02b48c6 RE |
1148 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
1149 | f_err: | |
1150 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1151 | err: | |
1152 | return(-1); | |
1153 | } | |
1154 | ||
6b691a5c | 1155 | static int ssl3_send_certificate_request(SSL *s) |
d02b48c6 RE |
1156 | { |
1157 | unsigned char *p,*d; | |
1158 | int i,j,nl,off,n; | |
f73e07cf | 1159 | STACK_OF(X509_NAME) *sk=NULL; |
d02b48c6 RE |
1160 | X509_NAME *name; |
1161 | BUF_MEM *buf; | |
1162 | ||
1163 | if (s->state == SSL3_ST_SW_CERT_REQ_A) | |
1164 | { | |
1165 | buf=s->init_buf; | |
1166 | ||
1167 | d=p=(unsigned char *)&(buf->data[4]); | |
1168 | ||
1169 | /* get the list of acceptable cert types */ | |
1170 | p++; | |
1171 | n=ssl3_get_req_cert_type(s,p); | |
1172 | d[0]=n; | |
1173 | p+=n; | |
1174 | n++; | |
1175 | ||
1176 | off=n; | |
1177 | p+=2; | |
1178 | n+=2; | |
1179 | ||
1180 | sk=SSL_get_client_CA_list(s); | |
1181 | nl=0; | |
1182 | if (sk != NULL) | |
1183 | { | |
f73e07cf | 1184 | for (i=0; i<sk_X509_NAME_num(sk); i++) |
d02b48c6 | 1185 | { |
f73e07cf | 1186 | name=sk_X509_NAME_value(sk,i); |
d02b48c6 RE |
1187 | j=i2d_X509_NAME(name,NULL); |
1188 | if (!BUF_MEM_grow(buf,4+n+j+2)) | |
1189 | { | |
1190 | SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); | |
1191 | goto err; | |
1192 | } | |
1193 | p=(unsigned char *)&(buf->data[4+n]); | |
58964a49 | 1194 | if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) |
d02b48c6 RE |
1195 | { |
1196 | s2n(j,p); | |
1197 | i2d_X509_NAME(name,&p); | |
1198 | n+=2+j; | |
1199 | nl+=2+j; | |
1200 | } | |
1201 | else | |
1202 | { | |
1203 | d=p; | |
1204 | i2d_X509_NAME(name,&p); | |
1205 | j-=2; s2n(j,d); j+=2; | |
1206 | n+=j; | |
1207 | nl+=j; | |
1208 | } | |
1209 | } | |
1210 | } | |
1211 | /* else no CA names */ | |
1212 | p=(unsigned char *)&(buf->data[4+off]); | |
1213 | s2n(nl,p); | |
1214 | ||
1215 | d=(unsigned char *)buf->data; | |
1216 | *(d++)=SSL3_MT_CERTIFICATE_REQUEST; | |
1217 | l2n3(n,d); | |
1218 | ||
1219 | /* we should now have things packed up, so lets send | |
1220 | * it off */ | |
1221 | ||
1222 | s->init_num=n+4; | |
1223 | s->init_off=0; | |
de469ef2 DSH |
1224 | #ifdef NETSCAPE_HANG_BUG |
1225 | p=(unsigned char *)s->init_buf->data + s->init_num; | |
1226 | ||
1227 | /* do the header */ | |
1228 | *(p++)=SSL3_MT_SERVER_DONE; | |
1229 | *(p++)=0; | |
1230 | *(p++)=0; | |
1231 | *(p++)=0; | |
1232 | s->init_num += 4; | |
1233 | #endif | |
1234 | ||
d02b48c6 RE |
1235 | } |
1236 | ||
1237 | /* SSL3_ST_SW_CERT_REQ_B */ | |
1238 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
1239 | err: | |
1240 | return(-1); | |
1241 | } | |
1242 | ||
6b691a5c | 1243 | static int ssl3_get_client_key_exchange(SSL *s) |
d02b48c6 RE |
1244 | { |
1245 | int i,al,ok; | |
1246 | long n; | |
1247 | unsigned long l; | |
1248 | unsigned char *p; | |
79df9d62 | 1249 | #ifndef NO_RSA |
d02b48c6 | 1250 | RSA *rsa=NULL; |
d02b48c6 | 1251 | EVP_PKEY *pkey=NULL; |
79df9d62 | 1252 | #endif |
58964a49 RE |
1253 | #ifndef NO_DH |
1254 | BIGNUM *pub=NULL; | |
d02b48c6 | 1255 | DH *dh_srvr; |
58964a49 | 1256 | #endif |
d02b48c6 RE |
1257 | |
1258 | n=ssl3_get_message(s, | |
1259 | SSL3_ST_SR_KEY_EXCH_A, | |
1260 | SSL3_ST_SR_KEY_EXCH_B, | |
1261 | SSL3_MT_CLIENT_KEY_EXCHANGE, | |
1262 | 400, /* ???? */ | |
1263 | &ok); | |
1264 | ||
1265 | if (!ok) return((int)n); | |
1266 | p=(unsigned char *)s->init_buf->data; | |
1267 | ||
1268 | l=s->s3->tmp.new_cipher->algorithms; | |
1269 | ||
1270 | #ifndef NO_RSA | |
1271 | if (l & SSL_kRSA) | |
1272 | { | |
1273 | /* FIX THIS UP EAY EAY EAY EAY */ | |
1274 | if (s->s3->tmp.use_rsa_tmp) | |
1275 | { | |
b56bce4f | 1276 | if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL)) |
ca8e5b9b | 1277 | rsa=s->cert->rsa_tmp; |
d02b48c6 RE |
1278 | /* Don't do a callback because rsa_tmp should |
1279 | * be sent already */ | |
1280 | if (rsa == NULL) | |
1281 | { | |
58964a49 | 1282 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1283 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY); |
1284 | goto f_err; | |
1285 | ||
1286 | } | |
1287 | } | |
1288 | else | |
1289 | { | |
1290 | pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey; | |
1291 | if ( (pkey == NULL) || | |
1292 | (pkey->type != EVP_PKEY_RSA) || | |
1293 | (pkey->pkey.rsa == NULL)) | |
1294 | { | |
58964a49 | 1295 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1296 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE); |
1297 | goto f_err; | |
1298 | } | |
1299 | rsa=pkey->pkey.rsa; | |
1300 | } | |
1301 | ||
58964a49 RE |
1302 | /* TLS */ |
1303 | if (s->version > SSL3_VERSION) | |
1304 | { | |
1305 | n2s(p,i); | |
1306 | if (n != i+2) | |
1307 | { | |
1308 | if (!(s->options & SSL_OP_TLS_D5_BUG)) | |
1309 | { | |
1310 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG); | |
1311 | goto err; | |
1312 | } | |
1313 | else | |
1314 | p-=2; | |
1315 | } | |
1316 | else | |
1317 | n=i; | |
1318 | } | |
1319 | ||
d02b48c6 | 1320 | i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING); |
58964a49 | 1321 | |
d02b48c6 RE |
1322 | if (i != SSL_MAX_MASTER_KEY_LENGTH) |
1323 | { | |
1324 | al=SSL_AD_DECODE_ERROR; | |
1325 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); | |
1326 | goto f_err; | |
1327 | } | |
1328 | ||
2c05c494 | 1329 | if (!((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff)))) |
d02b48c6 | 1330 | { |
2c05c494 BM |
1331 | /* The premaster secret must contain the same version number as the |
1332 | * ClientHello to detect version rollback attacks (strangely, the | |
1333 | * protocol does not offer such protection for DH ciphersuites). | |
1334 | * However, buggy clients exist that send the negotiated protocol | |
1335 | * version instead if the servers does not support the requested | |
1336 | * protocol version. | |
1337 | * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */ | |
1338 | if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) && | |
1339 | (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff)))) | |
1340 | { | |
1341 | al=SSL_AD_DECODE_ERROR; | |
1342 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); | |
1343 | goto f_err; | |
1344 | } | |
d02b48c6 | 1345 | } |
d02b48c6 RE |
1346 | |
1347 | s->session->master_key_length= | |
58964a49 | 1348 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 RE |
1349 | s->session->master_key, |
1350 | p,i); | |
1351 | memset(p,0,i); | |
1352 | } | |
1353 | else | |
4c5fac4a | 1354 | #endif |
d02b48c6 RE |
1355 | #ifndef NO_DH |
1356 | if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) | |
1357 | { | |
d02b48c6 RE |
1358 | n2s(p,i); |
1359 | if (n != i+2) | |
1360 | { | |
58964a49 | 1361 | if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG)) |
d02b48c6 RE |
1362 | { |
1363 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG); | |
1364 | goto err; | |
1365 | } | |
1366 | else | |
1367 | { | |
1368 | p-=2; | |
1369 | i=(int)n; | |
1370 | } | |
1371 | } | |
1372 | ||
1373 | if (n == 0L) /* the parameters are in the cert */ | |
1374 | { | |
58964a49 | 1375 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1376 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS); |
1377 | goto f_err; | |
1378 | } | |
1379 | else | |
1380 | { | |
1381 | if (s->s3->tmp.dh == NULL) | |
1382 | { | |
58964a49 | 1383 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1384 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
1385 | goto f_err; | |
1386 | } | |
1387 | else | |
1388 | dh_srvr=s->s3->tmp.dh; | |
1389 | } | |
1390 | ||
1391 | pub=BN_bin2bn(p,i,NULL); | |
1392 | if (pub == NULL) | |
1393 | { | |
1394 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB); | |
1395 | goto err; | |
1396 | } | |
58964a49 | 1397 | |
d02b48c6 RE |
1398 | i=DH_compute_key(p,pub,dh_srvr); |
1399 | ||
1400 | if (i <= 0) | |
1401 | { | |
1402 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1403 | goto err; | |
1404 | } | |
1405 | ||
1406 | DH_free(s->s3->tmp.dh); | |
1407 | s->s3->tmp.dh=NULL; | |
1408 | ||
1409 | BN_clear_free(pub); | |
1410 | pub=NULL; | |
1411 | s->session->master_key_length= | |
58964a49 | 1412 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 RE |
1413 | s->session->master_key,p,i); |
1414 | } | |
1415 | else | |
1416 | #endif | |
1417 | { | |
58964a49 | 1418 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1419 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNKNOWN_CIPHER_TYPE); |
1420 | goto f_err; | |
1421 | } | |
1422 | ||
1423 | return(1); | |
1424 | f_err: | |
1425 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
58964a49 | 1426 | #if !defined(NO_DH) || !defined(NO_RSA) |
d02b48c6 | 1427 | err: |
58964a49 | 1428 | #endif |
d02b48c6 RE |
1429 | return(-1); |
1430 | } | |
1431 | ||
6b691a5c | 1432 | static int ssl3_get_cert_verify(SSL *s) |
d02b48c6 RE |
1433 | { |
1434 | EVP_PKEY *pkey=NULL; | |
1435 | unsigned char *p; | |
1436 | int al,ok,ret=0; | |
1437 | long n; | |
1438 | int type=0,i,j; | |
1439 | X509 *peer; | |
1440 | ||
1441 | n=ssl3_get_message(s, | |
1442 | SSL3_ST_SR_CERT_VRFY_A, | |
1443 | SSL3_ST_SR_CERT_VRFY_B, | |
1444 | -1, | |
1445 | 512, /* 512? */ | |
1446 | &ok); | |
1447 | ||
1448 | if (!ok) return((int)n); | |
1449 | ||
1450 | if (s->session->peer != NULL) | |
1451 | { | |
1452 | peer=s->session->peer; | |
1453 | pkey=X509_get_pubkey(peer); | |
1454 | type=X509_certificate_type(peer,pkey); | |
1455 | } | |
1456 | else | |
1457 | { | |
1458 | peer=NULL; | |
1459 | pkey=NULL; | |
1460 | } | |
1461 | ||
1462 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY) | |
1463 | { | |
1464 | s->s3->tmp.reuse_message=1; | |
1465 | if ((peer != NULL) && (type | EVP_PKT_SIGN)) | |
1466 | { | |
58964a49 | 1467 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 | 1468 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE); |
d02b48c6 RE |
1469 | goto f_err; |
1470 | } | |
1471 | ret=1; | |
1472 | goto end; | |
1473 | } | |
1474 | ||
1475 | if (peer == NULL) | |
1476 | { | |
1477 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED); | |
58964a49 | 1478 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
1479 | goto f_err; |
1480 | } | |
1481 | ||
1482 | if (!(type & EVP_PKT_SIGN)) | |
1483 | { | |
1484 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE); | |
58964a49 | 1485 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
1486 | goto f_err; |
1487 | } | |
1488 | ||
1489 | if (s->s3->change_cipher_spec) | |
1490 | { | |
1491 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY); | |
58964a49 | 1492 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
1493 | goto f_err; |
1494 | } | |
1495 | ||
1496 | /* we now have a signature that we need to verify */ | |
1497 | p=(unsigned char *)s->init_buf->data; | |
1498 | n2s(p,i); | |
1499 | n-=2; | |
1500 | if (i > n) | |
1501 | { | |
1502 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH); | |
58964a49 | 1503 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1504 | goto f_err; |
1505 | } | |
1506 | ||
1507 | j=EVP_PKEY_size(pkey); | |
1508 | if ((i > j) || (n > j) || (n <= 0)) | |
1509 | { | |
1510 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE); | |
58964a49 | 1511 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1512 | goto f_err; |
1513 | } | |
1514 | ||
1515 | #ifndef NO_RSA | |
1516 | if (pkey->type == EVP_PKEY_RSA) | |
1517 | { | |
f2d9a32c | 1518 | i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md, |
1c80019a DSH |
1519 | MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i, |
1520 | pkey->pkey.rsa); | |
d02b48c6 RE |
1521 | if (i < 0) |
1522 | { | |
58964a49 | 1523 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
1524 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT); |
1525 | goto f_err; | |
1526 | } | |
1c80019a | 1527 | if (i == 0) |
d02b48c6 | 1528 | { |
58964a49 | 1529 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
1530 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE); |
1531 | goto f_err; | |
1532 | } | |
1533 | } | |
1534 | else | |
1535 | #endif | |
1536 | #ifndef NO_DSA | |
1537 | if (pkey->type == EVP_PKEY_DSA) | |
1538 | { | |
58964a49 | 1539 | j=DSA_verify(pkey->save_type, |
f2d9a32c | 1540 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), |
d02b48c6 RE |
1541 | SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa); |
1542 | if (j <= 0) | |
1543 | { | |
1544 | /* bad signature */ | |
58964a49 | 1545 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
1546 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE); |
1547 | goto f_err; | |
1548 | } | |
1549 | } | |
1550 | else | |
1551 | #endif | |
1552 | { | |
1553 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_INTERNAL_ERROR); | |
58964a49 | 1554 | al=SSL_AD_UNSUPPORTED_CERTIFICATE; |
d02b48c6 RE |
1555 | goto f_err; |
1556 | } | |
1557 | ||
1558 | ||
1559 | ret=1; | |
1560 | if (0) | |
1561 | { | |
1562 | f_err: | |
1563 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1564 | } | |
1565 | end: | |
a8236c8c | 1566 | EVP_PKEY_free(pkey); |
d02b48c6 RE |
1567 | return(ret); |
1568 | } | |
1569 | ||
6b691a5c | 1570 | static int ssl3_get_client_certificate(SSL *s) |
d02b48c6 RE |
1571 | { |
1572 | int i,ok,al,ret= -1; | |
1573 | X509 *x=NULL; | |
1574 | unsigned long l,nc,llen,n; | |
1575 | unsigned char *p,*d,*q; | |
f73e07cf | 1576 | STACK_OF(X509) *sk=NULL; |
d02b48c6 RE |
1577 | |
1578 | n=ssl3_get_message(s, | |
1579 | SSL3_ST_SR_CERT_A, | |
1580 | SSL3_ST_SR_CERT_B, | |
1581 | -1, | |
1582 | #if defined(MSDOS) && !defined(WIN32) | |
1583 | 1024*30, /* 30k max cert list :-) */ | |
1584 | #else | |
1585 | 1024*100, /* 100k max cert list :-) */ | |
1586 | #endif | |
1587 | &ok); | |
1588 | ||
1589 | if (!ok) return((int)n); | |
1590 | ||
1591 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE) | |
1592 | { | |
1593 | if ( (s->verify_mode & SSL_VERIFY_PEER) && | |
1594 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
1595 | { | |
1596 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
58964a49 RE |
1597 | al=SSL_AD_HANDSHAKE_FAILURE; |
1598 | goto f_err; | |
1599 | } | |
47134b78 | 1600 | /* If tls asked for a client cert, the client must return a 0 list */ |
58964a49 RE |
1601 | if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request) |
1602 | { | |
1603 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST); | |
1604 | al=SSL_AD_UNEXPECTED_MESSAGE; | |
d02b48c6 RE |
1605 | goto f_err; |
1606 | } | |
1607 | s->s3->tmp.reuse_message=1; | |
1608 | return(1); | |
1609 | } | |
1610 | ||
1611 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) | |
1612 | { | |
58964a49 | 1613 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
1614 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE); |
1615 | goto f_err; | |
1616 | } | |
1617 | d=p=(unsigned char *)s->init_buf->data; | |
1618 | ||
f73e07cf | 1619 | if ((sk=sk_X509_new_null()) == NULL) |
d02b48c6 RE |
1620 | { |
1621 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
1622 | goto err; | |
1623 | } | |
1624 | ||
1625 | n2l3(p,llen); | |
1626 | if (llen+3 != n) | |
1627 | { | |
58964a49 | 1628 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1629 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH); |
1630 | goto f_err; | |
1631 | } | |
1632 | for (nc=0; nc<llen; ) | |
1633 | { | |
1634 | n2l3(p,l); | |
1635 | if ((l+nc+3) > llen) | |
1636 | { | |
58964a49 | 1637 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1638 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
1639 | goto f_err; | |
1640 | } | |
1641 | ||
1642 | q=p; | |
1643 | x=d2i_X509(NULL,&p,l); | |
1644 | if (x == NULL) | |
1645 | { | |
1646 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB); | |
1647 | goto err; | |
1648 | } | |
1649 | if (p != (q+l)) | |
1650 | { | |
58964a49 | 1651 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1652 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
1653 | goto f_err; | |
1654 | } | |
f73e07cf | 1655 | if (!sk_X509_push(sk,x)) |
d02b48c6 RE |
1656 | { |
1657 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
1658 | goto err; | |
1659 | } | |
1660 | x=NULL; | |
1661 | nc+=l+3; | |
1662 | } | |
1663 | ||
f73e07cf | 1664 | if (sk_X509_num(sk) <= 0) |
d02b48c6 | 1665 | { |
58964a49 RE |
1666 | /* TLS does not mind 0 certs returned */ |
1667 | if (s->version == SSL3_VERSION) | |
1668 | { | |
1669 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1670 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED); | |
1671 | goto f_err; | |
1672 | } | |
1673 | /* Fail for TLS only if we required a certificate */ | |
1674 | else if ((s->verify_mode & SSL_VERIFY_PEER) && | |
1675 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
1676 | { | |
1677 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
1678 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1679 | goto f_err; | |
1680 | } | |
d02b48c6 | 1681 | } |
58964a49 | 1682 | else |
d02b48c6 | 1683 | { |
58964a49 RE |
1684 | i=ssl_verify_cert_chain(s,sk); |
1685 | if (!i) | |
1686 | { | |
1687 | al=ssl_verify_alarm_type(s->verify_result); | |
1688 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED); | |
1689 | goto f_err; | |
1690 | } | |
d02b48c6 RE |
1691 | } |
1692 | ||
b56bce4f | 1693 | if (s->session->peer != NULL) /* This should not be needed */ |
d02b48c6 | 1694 | X509_free(s->session->peer); |
f73e07cf | 1695 | s->session->peer=sk_X509_shift(sk); |
b1fe6ca1 | 1696 | s->session->verify_result = s->verify_result; |
8051996a | 1697 | |
b56bce4f BM |
1698 | /* With the current implementation, sess_cert will always be NULL |
1699 | * when we arrive here. */ | |
1700 | if (s->session->sess_cert == NULL) | |
1701 | { | |
1702 | s->session->sess_cert = ssl_sess_cert_new(); | |
1703 | if (s->session->sess_cert == NULL) | |
1704 | { | |
1705 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE); | |
1706 | goto err; | |
1707 | } | |
1708 | } | |
1709 | if (s->session->sess_cert->cert_chain != NULL) | |
1710 | sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free); | |
9d5cceac | 1711 | s->session->sess_cert->cert_chain=sk; |
98e04f9e BM |
1712 | /* Inconsistency alert: cert_chain does *not* include the |
1713 | * peer's own certificate, while we do include it in s3_clnt.c */ | |
8051996a | 1714 | |
b4cadc6e | 1715 | sk=NULL; |
d02b48c6 RE |
1716 | |
1717 | ret=1; | |
1718 | if (0) | |
1719 | { | |
1720 | f_err: | |
1721 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1722 | } | |
1723 | err: | |
1724 | if (x != NULL) X509_free(x); | |
f73e07cf | 1725 | if (sk != NULL) sk_X509_pop_free(sk,X509_free); |
d02b48c6 RE |
1726 | return(ret); |
1727 | } | |
1728 | ||
6b691a5c | 1729 | int ssl3_send_server_certificate(SSL *s) |
d02b48c6 RE |
1730 | { |
1731 | unsigned long l; | |
1732 | X509 *x; | |
1733 | ||
1734 | if (s->state == SSL3_ST_SW_CERT_A) | |
1735 | { | |
1736 | x=ssl_get_server_send_cert(s); | |
1737 | if (x == NULL) | |
1738 | { | |
1739 | SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,SSL_R_INTERNAL_ERROR); | |
1740 | return(0); | |
1741 | } | |
1742 | ||
1743 | l=ssl3_output_cert_chain(s,x); | |
1744 | s->state=SSL3_ST_SW_CERT_B; | |
1745 | s->init_num=(int)l; | |
1746 | s->init_off=0; | |
1747 | } | |
1748 | ||
1749 | /* SSL3_ST_SW_CERT_B */ | |
1750 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
1751 | } |