]>
Commit | Line | Data |
---|---|---|
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 | */ | |
8e2f6b79 | 58 | /* ==================================================================== |
f1fd4544 | 59 | * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. |
8e2f6b79 BM |
60 | * |
61 | * Redistribution and use in source and binary forms, with or without | |
62 | * modification, are permitted provided that the following conditions | |
63 | * are met: | |
64 | * | |
65 | * 1. Redistributions of source code must retain the above copyright | |
66 | * notice, this list of conditions and the following disclaimer. | |
67 | * | |
68 | * 2. Redistributions in binary form must reproduce the above copyright | |
69 | * notice, this list of conditions and the following disclaimer in | |
70 | * the documentation and/or other materials provided with the | |
71 | * distribution. | |
72 | * | |
73 | * 3. All advertising materials mentioning features or use of this | |
74 | * software must display the following acknowledgment: | |
75 | * "This product includes software developed by the OpenSSL Project | |
76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
77 | * | |
78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
79 | * endorse or promote products derived from this software without | |
80 | * prior written permission. For written permission, please contact | |
81 | * openssl-core@openssl.org. | |
82 | * | |
83 | * 5. Products derived from this software may not be called "OpenSSL" | |
84 | * nor may "OpenSSL" appear in their names without prior written | |
85 | * permission of the OpenSSL Project. | |
86 | * | |
87 | * 6. Redistributions of any form whatsoever must retain the following | |
88 | * acknowledgment: | |
89 | * "This product includes software developed by the OpenSSL Project | |
90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
91 | * | |
92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
103 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
104 | * ==================================================================== | |
105 | * | |
106 | * This product includes cryptographic software written by Eric Young | |
107 | * (eay@cryptsoft.com). This product includes software written by Tim | |
108 | * Hudson (tjh@cryptsoft.com). | |
109 | * | |
110 | */ | |
ea262260 BM |
111 | /* ==================================================================== |
112 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
113 | * | |
114 | * Portions of the attached software ("Contribution") are developed by | |
115 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. | |
116 | * | |
117 | * The Contribution is licensed pursuant to the OpenSSL open source | |
118 | * license provided above. | |
119 | * | |
ea262260 BM |
120 | * ECC cipher suite support in OpenSSL originally written by |
121 | * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. | |
122 | * | |
123 | */ | |
d02b48c6 RE |
124 | |
125 | #define REUSE_CIPHER_BUG | |
de469ef2 DSH |
126 | #define NETSCAPE_HANG_BUG |
127 | ||
d02b48c6 | 128 | #include <stdio.h> |
7b63c0fa LJ |
129 | #include "ssl_locl.h" |
130 | #include "kssl_lcl.h" | |
ec577822 BM |
131 | #include <openssl/buffer.h> |
132 | #include <openssl/rand.h> | |
133 | #include <openssl/objects.h> | |
134 | #include <openssl/evp.h> | |
135 | #include <openssl/x509.h> | |
3eeaab4b | 136 | #ifndef OPENSSL_NO_DH |
60a938c6 | 137 | #include <openssl/dh.h> |
3eeaab4b | 138 | #endif |
d095b68d | 139 | #include <openssl/bn.h> |
5fdf0666 | 140 | #ifndef OPENSSL_NO_KRB5 |
2a1ef754 | 141 | #include <openssl/krb5_asn.h> |
5fdf0666 | 142 | #endif |
dbad1690 | 143 | #include <openssl/md5.h> |
f9b3bff6 | 144 | |
4ebb342f | 145 | static const SSL_METHOD *ssl3_get_server_method(int ver); |
d02b48c6 | 146 | |
ea262260 BM |
147 | #ifndef OPENSSL_NO_ECDH |
148 | static int nid2curve_id(int nid); | |
149 | #endif | |
150 | ||
4ebb342f | 151 | static const SSL_METHOD *ssl3_get_server_method(int ver) |
d02b48c6 | 152 | { |
58964a49 | 153 | if (ver == SSL3_VERSION) |
d02b48c6 RE |
154 | return(SSLv3_server_method()); |
155 | else | |
156 | return(NULL); | |
157 | } | |
158 | ||
f3b656b2 DSH |
159 | IMPLEMENT_ssl3_meth_func(SSLv3_server_method, |
160 | ssl3_accept, | |
161 | ssl_undefined_function, | |
162 | ssl3_get_server_method) | |
d02b48c6 | 163 | |
6b691a5c | 164 | int ssl3_accept(SSL *s) |
d02b48c6 RE |
165 | { |
166 | BUF_MEM *buf; | |
7bbcb2f6 | 167 | unsigned long l,Time=(unsigned long)time(NULL); |
45d87a1f | 168 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
d02b48c6 RE |
169 | long num1; |
170 | int ret= -1; | |
d02b48c6 RE |
171 | int new_state,state,skip=0; |
172 | ||
eb952088 | 173 | RAND_add(&Time,sizeof(Time),0); |
d02b48c6 | 174 | ERR_clear_error(); |
58964a49 | 175 | clear_sys_error(); |
d02b48c6 RE |
176 | |
177 | if (s->info_callback != NULL) | |
178 | cb=s->info_callback; | |
179 | else if (s->ctx->info_callback != NULL) | |
180 | cb=s->ctx->info_callback; | |
181 | ||
182 | /* init things to blank */ | |
d02b48c6 | 183 | s->in_handshake++; |
979689aa | 184 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); |
d02b48c6 | 185 | |
b56bce4f | 186 | if (s->cert == NULL) |
d02b48c6 RE |
187 | { |
188 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET); | |
b56bce4f | 189 | return(-1); |
d02b48c6 | 190 | } |
d02b48c6 RE |
191 | |
192 | for (;;) | |
193 | { | |
194 | state=s->state; | |
195 | ||
196 | switch (s->state) | |
197 | { | |
198 | case SSL_ST_RENEGOTIATE: | |
199 | s->new_session=1; | |
200 | /* s->state=SSL_ST_ACCEPT; */ | |
201 | ||
202 | case SSL_ST_BEFORE: | |
203 | case SSL_ST_ACCEPT: | |
204 | case SSL_ST_BEFORE|SSL_ST_ACCEPT: | |
205 | case SSL_ST_OK|SSL_ST_ACCEPT: | |
206 | ||
413c4f45 | 207 | s->server=1; |
d02b48c6 RE |
208 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
209 | ||
58964a49 | 210 | if ((s->version>>8) != 3) |
bbb8de09 | 211 | { |
5277d7cb | 212 | SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR); |
bbb8de09 BM |
213 | return -1; |
214 | } | |
d02b48c6 RE |
215 | s->type=SSL_ST_ACCEPT; |
216 | ||
217 | if (s->init_buf == NULL) | |
218 | { | |
219 | if ((buf=BUF_MEM_new()) == NULL) | |
220 | { | |
221 | ret= -1; | |
222 | goto end; | |
223 | } | |
224 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
225 | { | |
226 | ret= -1; | |
227 | goto end; | |
228 | } | |
229 | s->init_buf=buf; | |
230 | } | |
231 | ||
232 | if (!ssl3_setup_buffers(s)) | |
233 | { | |
234 | ret= -1; | |
235 | goto end; | |
236 | } | |
237 | ||
d02b48c6 RE |
238 | s->init_num=0; |
239 | ||
240 | if (s->state != SSL_ST_RENEGOTIATE) | |
241 | { | |
8e2f6b79 BM |
242 | /* Ok, we now need to push on a buffering BIO so that |
243 | * the output is sent in a way that TCP likes :-) | |
244 | */ | |
245 | if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } | |
246 | ||
745c70e5 | 247 | ssl3_init_finished_mac(s); |
d02b48c6 | 248 | s->state=SSL3_ST_SR_CLNT_HELLO_A; |
413c4f45 | 249 | s->ctx->stats.sess_accept++; |
d02b48c6 RE |
250 | } |
251 | else | |
252 | { | |
8e2f6b79 BM |
253 | /* s->state == SSL_ST_RENEGOTIATE, |
254 | * we will just send a HelloRequest */ | |
413c4f45 | 255 | s->ctx->stats.sess_accept_renegotiate++; |
d02b48c6 RE |
256 | s->state=SSL3_ST_SW_HELLO_REQ_A; |
257 | } | |
258 | break; | |
259 | ||
260 | case SSL3_ST_SW_HELLO_REQ_A: | |
261 | case SSL3_ST_SW_HELLO_REQ_B: | |
262 | ||
263 | s->shutdown=0; | |
264 | ret=ssl3_send_hello_request(s); | |
265 | if (ret <= 0) goto end; | |
266 | s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C; | |
267 | s->state=SSL3_ST_SW_FLUSH; | |
268 | s->init_num=0; | |
269 | ||
270 | ssl3_init_finished_mac(s); | |
271 | break; | |
272 | ||
273 | case SSL3_ST_SW_HELLO_REQ_C: | |
d02b48c6 | 274 | s->state=SSL_ST_OK; |
2260ad21 | 275 | break; |
d02b48c6 RE |
276 | |
277 | case SSL3_ST_SR_CLNT_HELLO_A: | |
278 | case SSL3_ST_SR_CLNT_HELLO_B: | |
279 | case SSL3_ST_SR_CLNT_HELLO_C: | |
280 | ||
281 | s->shutdown=0; | |
282 | ret=ssl3_get_client_hello(s); | |
283 | if (ret <= 0) goto end; | |
ed3883d2 BM |
284 | #ifndef OPENSSL_NO_TLSEXT |
285 | { | |
f1fd4544 BM |
286 | int al; |
287 | if (ssl_check_tlsext(s,&al) <= 0) | |
288 | { | |
289 | ssl3_send_alert(s,SSL3_AL_FATAL,al); /* XXX does this *have* to be fatal? */ | |
ed3883d2 | 290 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_CLIENTHELLO_TLS_EXT); |
f1fd4544 | 291 | ret = -1; |
ed3883d2 | 292 | goto end; |
f1fd4544 | 293 | } |
ed3883d2 BM |
294 | } |
295 | #endif | |
8c74b5e5 | 296 | s->new_session = 2; |
d02b48c6 RE |
297 | s->state=SSL3_ST_SW_SRVR_HELLO_A; |
298 | s->init_num=0; | |
299 | break; | |
300 | ||
301 | case SSL3_ST_SW_SRVR_HELLO_A: | |
302 | case SSL3_ST_SW_SRVR_HELLO_B: | |
303 | ret=ssl3_send_server_hello(s); | |
304 | if (ret <= 0) goto end; | |
305 | ||
306 | if (s->hit) | |
307 | s->state=SSL3_ST_SW_CHANGE_A; | |
308 | else | |
309 | s->state=SSL3_ST_SW_CERT_A; | |
310 | s->init_num=0; | |
311 | break; | |
312 | ||
313 | case SSL3_ST_SW_CERT_A: | |
314 | case SSL3_ST_SW_CERT_B: | |
ea262260 | 315 | /* Check if it is anon DH or anon ECDH */ |
d02b48c6 RE |
316 | if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) |
317 | { | |
318 | ret=ssl3_send_server_certificate(s); | |
319 | if (ret <= 0) goto end; | |
320 | } | |
321 | else | |
322 | skip=1; | |
323 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
324 | s->init_num=0; | |
325 | break; | |
326 | ||
327 | case SSL3_ST_SW_KEY_EXCH_A: | |
328 | case SSL3_ST_SW_KEY_EXCH_B: | |
329 | l=s->s3->tmp.new_cipher->algorithms; | |
d02b48c6 RE |
330 | |
331 | /* clear this, it may get reset by | |
332 | * send_server_key_exchange */ | |
f9b3bff6 | 333 | if ((s->options & SSL_OP_EPHEMERAL_RSA) |
bc36ee62 | 334 | #ifndef OPENSSL_NO_KRB5 |
f9b3bff6 | 335 | && !(l & SSL_KRB5) |
bc36ee62 | 336 | #endif /* OPENSSL_NO_KRB5 */ |
f9b3bff6 | 337 | ) |
7bc03ded BM |
338 | /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key |
339 | * even when forbidden by protocol specs | |
340 | * (handshake may fail as clients are not required to | |
341 | * be able to handle this) */ | |
d02b48c6 RE |
342 | s->s3->tmp.use_rsa_tmp=1; |
343 | else | |
344 | s->s3->tmp.use_rsa_tmp=0; | |
345 | ||
ea262260 | 346 | |
d02b48c6 | 347 | /* only send if a DH key exchange, fortezza or |
ea262260 BM |
348 | * RSA but we have a sign only certificate |
349 | * | |
350 | * For ECC ciphersuites, we send a serverKeyExchange | |
351 | * message only if the cipher suite is either | |
352 | * ECDH-anon or ECDHE. In other cases, the | |
353 | * server certificate contains the server's | |
354 | * public key for key exchange. | |
355 | */ | |
06ab81f9 | 356 | if (s->s3->tmp.use_rsa_tmp |
ea262260 | 357 | || (l & SSL_kECDHE) |
06ab81f9 BL |
358 | || (l & (SSL_DH|SSL_kFZA)) |
359 | || ((l & SSL_kRSA) | |
b56bce4f | 360 | && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL |
018e57c7 DSH |
361 | || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) |
362 | && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher) | |
06ab81f9 BL |
363 | ) |
364 | ) | |
365 | ) | |
d02b48c6 | 366 | ) |
d02b48c6 RE |
367 | { |
368 | ret=ssl3_send_server_key_exchange(s); | |
369 | if (ret <= 0) goto end; | |
370 | } | |
371 | else | |
372 | skip=1; | |
373 | ||
374 | s->state=SSL3_ST_SW_CERT_REQ_A; | |
375 | s->init_num=0; | |
376 | break; | |
377 | ||
378 | case SSL3_ST_SW_CERT_REQ_A: | |
379 | case SSL3_ST_SW_CERT_REQ_B: | |
47134b78 BM |
380 | if (/* don't request cert unless asked for it: */ |
381 | !(s->verify_mode & SSL_VERIFY_PEER) || | |
382 | /* if SSL_VERIFY_CLIENT_ONCE is set, | |
383 | * don't request cert during re-negotiation: */ | |
d02b48c6 | 384 | ((s->session->peer != NULL) && |
47134b78 BM |
385 | (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) || |
386 | /* never request cert in anonymous ciphersuites | |
387 | * (see section "Certificate request" in SSL 3 drafts | |
388 | * and in RFC 2246): */ | |
389 | ((s->s3->tmp.new_cipher->algorithms & SSL_aNULL) && | |
390 | /* ... except when the application insists on verification | |
391 | * (against the specs, but s3_clnt.c accepts this for SSL 3) */ | |
45442167 RL |
392 | !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) || |
393 | /* never request cert in Kerberos ciphersuites */ | |
394 | (s->s3->tmp.new_cipher->algorithms & SSL_aKRB5)) | |
d02b48c6 RE |
395 | { |
396 | /* no cert request */ | |
397 | skip=1; | |
58964a49 | 398 | s->s3->tmp.cert_request=0; |
d02b48c6 RE |
399 | s->state=SSL3_ST_SW_SRVR_DONE_A; |
400 | } | |
401 | else | |
402 | { | |
58964a49 | 403 | s->s3->tmp.cert_request=1; |
d02b48c6 RE |
404 | ret=ssl3_send_certificate_request(s); |
405 | if (ret <= 0) goto end; | |
de469ef2 | 406 | #ifndef NETSCAPE_HANG_BUG |
d02b48c6 | 407 | s->state=SSL3_ST_SW_SRVR_DONE_A; |
de469ef2 DSH |
408 | #else |
409 | s->state=SSL3_ST_SW_FLUSH; | |
410 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
411 | #endif | |
d02b48c6 RE |
412 | s->init_num=0; |
413 | } | |
414 | break; | |
415 | ||
416 | case SSL3_ST_SW_SRVR_DONE_A: | |
417 | case SSL3_ST_SW_SRVR_DONE_B: | |
418 | ret=ssl3_send_server_done(s); | |
419 | if (ret <= 0) goto end; | |
420 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
421 | s->state=SSL3_ST_SW_FLUSH; | |
422 | s->init_num=0; | |
423 | break; | |
424 | ||
425 | case SSL3_ST_SW_FLUSH: | |
426 | /* number of bytes to be flushed */ | |
427 | num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL); | |
428 | if (num1 > 0) | |
429 | { | |
430 | s->rwstate=SSL_WRITING; | |
431 | num1=BIO_flush(s->wbio); | |
432 | if (num1 <= 0) { ret= -1; goto end; } | |
433 | s->rwstate=SSL_NOTHING; | |
434 | } | |
435 | ||
436 | s->state=s->s3->tmp.next_state; | |
437 | break; | |
438 | ||
439 | case SSL3_ST_SR_CERT_A: | |
440 | case SSL3_ST_SR_CERT_B: | |
745c70e5 | 441 | /* Check for second client hello (MS SGC) */ |
3d14b9d0 | 442 | ret = ssl3_check_client_hello(s); |
745c70e5 BM |
443 | if (ret <= 0) |
444 | goto end; | |
445 | if (ret == 2) | |
446 | s->state = SSL3_ST_SR_CLNT_HELLO_C; | |
3d14b9d0 | 447 | else { |
14f3d7c5 DSH |
448 | if (s->s3->tmp.cert_request) |
449 | { | |
450 | ret=ssl3_get_client_certificate(s); | |
451 | if (ret <= 0) goto end; | |
452 | } | |
3d14b9d0 DSH |
453 | s->init_num=0; |
454 | s->state=SSL3_ST_SR_KEY_EXCH_A; | |
455 | } | |
d02b48c6 RE |
456 | break; |
457 | ||
458 | case SSL3_ST_SR_KEY_EXCH_A: | |
459 | case SSL3_ST_SR_KEY_EXCH_B: | |
460 | ret=ssl3_get_client_key_exchange(s); | |
ea262260 BM |
461 | if (ret <= 0) |
462 | goto end; | |
463 | if (ret == 2) | |
464 | { | |
465 | /* For the ECDH ciphersuites when | |
466 | * the client sends its ECDH pub key in | |
467 | * a certificate, the CertificateVerify | |
468 | * message is not sent. | |
469 | */ | |
470 | s->state=SSL3_ST_SR_FINISHED_A; | |
471 | s->init_num = 0; | |
472 | } | |
473 | else | |
474 | { | |
475 | s->state=SSL3_ST_SR_CERT_VRFY_A; | |
476 | s->init_num=0; | |
d02b48c6 | 477 | |
ea262260 BM |
478 | /* We need to get hashes here so if there is |
479 | * a client cert, it can be verified | |
480 | */ | |
481 | s->method->ssl3_enc->cert_verify_mac(s, | |
482 | &(s->s3->finish_dgst1), | |
483 | &(s->s3->tmp.cert_verify_md[0])); | |
484 | s->method->ssl3_enc->cert_verify_mac(s, | |
485 | &(s->s3->finish_dgst2), | |
486 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH])); | |
487 | } | |
d02b48c6 RE |
488 | break; |
489 | ||
490 | case SSL3_ST_SR_CERT_VRFY_A: | |
491 | case SSL3_ST_SR_CERT_VRFY_B: | |
492 | ||
493 | /* we should decide if we expected this one */ | |
494 | ret=ssl3_get_cert_verify(s); | |
495 | if (ret <= 0) goto end; | |
496 | ||
497 | s->state=SSL3_ST_SR_FINISHED_A; | |
498 | s->init_num=0; | |
499 | break; | |
500 | ||
501 | case SSL3_ST_SR_FINISHED_A: | |
502 | case SSL3_ST_SR_FINISHED_B: | |
503 | ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, | |
58964a49 | 504 | SSL3_ST_SR_FINISHED_B); |
d02b48c6 RE |
505 | if (ret <= 0) goto end; |
506 | if (s->hit) | |
507 | s->state=SSL_ST_OK; | |
508 | else | |
509 | s->state=SSL3_ST_SW_CHANGE_A; | |
510 | s->init_num=0; | |
511 | break; | |
512 | ||
513 | case SSL3_ST_SW_CHANGE_A: | |
514 | case SSL3_ST_SW_CHANGE_B: | |
515 | ||
516 | s->session->cipher=s->s3->tmp.new_cipher; | |
58964a49 RE |
517 | if (!s->method->ssl3_enc->setup_key_block(s)) |
518 | { ret= -1; goto end; } | |
d02b48c6 RE |
519 | |
520 | ret=ssl3_send_change_cipher_spec(s, | |
521 | SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); | |
522 | ||
523 | if (ret <= 0) goto end; | |
524 | s->state=SSL3_ST_SW_FINISHED_A; | |
525 | s->init_num=0; | |
526 | ||
58964a49 | 527 | if (!s->method->ssl3_enc->change_cipher_state(s, |
d02b48c6 RE |
528 | SSL3_CHANGE_CIPHER_SERVER_WRITE)) |
529 | { | |
530 | ret= -1; | |
531 | goto end; | |
532 | } | |
533 | ||
534 | break; | |
535 | ||
536 | case SSL3_ST_SW_FINISHED_A: | |
537 | case SSL3_ST_SW_FINISHED_B: | |
538 | ret=ssl3_send_finished(s, | |
539 | SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B, | |
c44f7540 BM |
540 | s->method->ssl3_enc->server_finished_label, |
541 | s->method->ssl3_enc->server_finished_label_len); | |
d02b48c6 RE |
542 | if (ret <= 0) goto end; |
543 | s->state=SSL3_ST_SW_FLUSH; | |
544 | if (s->hit) | |
545 | s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; | |
546 | else | |
547 | s->s3->tmp.next_state=SSL_ST_OK; | |
548 | s->init_num=0; | |
549 | break; | |
550 | ||
551 | case SSL_ST_OK: | |
552 | /* clean a few things up */ | |
553 | ssl3_cleanup_key_block(s); | |
554 | ||
555 | BUF_MEM_free(s->init_buf); | |
556 | s->init_buf=NULL; | |
557 | ||
558 | /* remove buffering on output */ | |
413c4f45 | 559 | ssl_free_wbio_buffer(s); |
d02b48c6 | 560 | |
d02b48c6 RE |
561 | s->init_num=0; |
562 | ||
8c74b5e5 | 563 | if (s->new_session == 2) /* skipped if we just sent a HelloRequest */ |
b49124f6 BM |
564 | { |
565 | /* actually not necessarily a 'new' session unless | |
566 | * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */ | |
567 | ||
568 | s->new_session=0; | |
569 | ||
570 | ssl_update_cache(s,SSL_SESS_CACHE_SERVER); | |
571 | ||
572 | s->ctx->stats.sess_accept_good++; | |
573 | /* s->server=1; */ | |
574 | s->handshake_func=ssl3_accept; | |
d02b48c6 | 575 | |
b49124f6 BM |
576 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); |
577 | } | |
578 | ||
681bfae4 | 579 | ret = 1; |
d02b48c6 | 580 | goto end; |
58964a49 | 581 | /* break; */ |
d02b48c6 RE |
582 | |
583 | default: | |
584 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE); | |
585 | ret= -1; | |
586 | goto end; | |
58964a49 | 587 | /* break; */ |
d02b48c6 RE |
588 | } |
589 | ||
590 | if (!s->s3->tmp.reuse_message && !skip) | |
591 | { | |
58964a49 RE |
592 | if (s->debug) |
593 | { | |
594 | if ((ret=BIO_flush(s->wbio)) <= 0) | |
595 | goto end; | |
596 | } | |
597 | ||
d02b48c6 RE |
598 | |
599 | if ((cb != NULL) && (s->state != state)) | |
600 | { | |
601 | new_state=s->state; | |
602 | s->state=state; | |
603 | cb(s,SSL_CB_ACCEPT_LOOP,1); | |
604 | s->state=new_state; | |
605 | } | |
606 | } | |
607 | skip=0; | |
608 | } | |
609 | end: | |
610 | /* BIO_flush(s->wbio); */ | |
611 | ||
4d635a70 | 612 | s->in_handshake--; |
d02b48c6 RE |
613 | if (cb != NULL) |
614 | cb(s,SSL_CB_ACCEPT_EXIT,ret); | |
d02b48c6 RE |
615 | return(ret); |
616 | } | |
617 | ||
36d16f8e | 618 | int ssl3_send_hello_request(SSL *s) |
d02b48c6 RE |
619 | { |
620 | unsigned char *p; | |
621 | ||
622 | if (s->state == SSL3_ST_SW_HELLO_REQ_A) | |
623 | { | |
624 | p=(unsigned char *)s->init_buf->data; | |
c51ae173 | 625 | *(p++)=SSL3_MT_HELLO_REQUEST; |
d02b48c6 RE |
626 | *(p++)=0; |
627 | *(p++)=0; | |
628 | *(p++)=0; | |
629 | ||
630 | s->state=SSL3_ST_SW_HELLO_REQ_B; | |
631 | /* number of bytes to write */ | |
632 | s->init_num=4; | |
633 | s->init_off=0; | |
634 | } | |
635 | ||
636 | /* SSL3_ST_SW_HELLO_REQ_B */ | |
637 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
638 | } | |
639 | ||
36d16f8e | 640 | int ssl3_check_client_hello(SSL *s) |
3d14b9d0 DSH |
641 | { |
642 | int ok; | |
643 | long n; | |
644 | ||
b78e5021 BM |
645 | /* this function is called when we really expect a Certificate message, |
646 | * so permit appropriate message length */ | |
36d16f8e | 647 | n=s->method->ssl_get_message(s, |
3d14b9d0 DSH |
648 | SSL3_ST_SR_CERT_A, |
649 | SSL3_ST_SR_CERT_B, | |
650 | -1, | |
c0f5dd07 | 651 | s->max_cert_list, |
3d14b9d0 DSH |
652 | &ok); |
653 | if (!ok) return((int)n); | |
654 | s->s3->tmp.reuse_message = 1; | |
a2a01589 BM |
655 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO) |
656 | { | |
657 | /* Throw away what we have done so far in the current handshake, | |
658 | * which will now be aborted. (A full SSL_clear would be too much.) | |
659 | * I hope that tmp.dh is the only thing that may need to be cleared | |
660 | * when a handshake is not completed ... */ | |
bc36ee62 | 661 | #ifndef OPENSSL_NO_DH |
a2a01589 BM |
662 | if (s->s3->tmp.dh != NULL) |
663 | { | |
664 | DH_free(s->s3->tmp.dh); | |
665 | s->s3->tmp.dh = NULL; | |
666 | } | |
667 | #endif | |
668 | return 2; | |
669 | } | |
3d14b9d0 DSH |
670 | return 1; |
671 | } | |
672 | ||
36d16f8e | 673 | int ssl3_get_client_hello(SSL *s) |
d02b48c6 RE |
674 | { |
675 | int i,j,ok,al,ret= -1; | |
6c61726b | 676 | unsigned int cookie_len; |
d02b48c6 RE |
677 | long n; |
678 | unsigned long id; | |
413c4f45 | 679 | unsigned char *p,*d,*q; |
d02b48c6 | 680 | SSL_CIPHER *c; |
09b6c2ef | 681 | #ifndef OPENSSL_NO_COMP |
413c4f45 | 682 | SSL_COMP *comp=NULL; |
09b6c2ef | 683 | #endif |
f73e07cf | 684 | STACK_OF(SSL_CIPHER) *ciphers=NULL; |
d02b48c6 | 685 | |
58964a49 RE |
686 | /* We do this so that we will respond with our native type. |
687 | * If we are TLSv1 and we get SSLv3, we will respond with TLSv1, | |
688 | * This down switching should be handled by a different method. | |
689 | * If we are SSLv3, we will respond with SSLv3, even if prompted with | |
690 | * TLSv1. | |
691 | */ | |
d02b48c6 RE |
692 | if (s->state == SSL3_ST_SR_CLNT_HELLO_A) |
693 | { | |
694 | s->first_packet=1; | |
695 | s->state=SSL3_ST_SR_CLNT_HELLO_B; | |
696 | } | |
36d16f8e | 697 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
698 | SSL3_ST_SR_CLNT_HELLO_B, |
699 | SSL3_ST_SR_CLNT_HELLO_C, | |
700 | SSL3_MT_CLIENT_HELLO, | |
701 | SSL3_RT_MAX_PLAIN_LENGTH, | |
702 | &ok); | |
703 | ||
704 | if (!ok) return((int)n); | |
48948d53 | 705 | d=p=(unsigned char *)s->init_msg; |
d02b48c6 | 706 | |
074309b7 BM |
707 | /* use version from inside client hello, not from record header |
708 | * (may differ: see RFC 2246, Appendix E, second paragraph) */ | |
709 | s->client_version=(((int)p[0])<<8)|(int)p[1]; | |
d02b48c6 RE |
710 | p+=2; |
711 | ||
a661b653 BM |
712 | if (s->client_version < s->version) |
713 | { | |
714 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER); | |
715 | if ((s->client_version>>8) == SSL3_VERSION_MAJOR) | |
716 | { | |
717 | /* similar to ssl3_get_record, send alert using remote version number */ | |
718 | s->version = s->client_version; | |
719 | } | |
720 | al = SSL_AD_PROTOCOL_VERSION; | |
721 | goto f_err; | |
722 | } | |
723 | ||
d02b48c6 RE |
724 | /* load the client random */ |
725 | memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE); | |
726 | p+=SSL3_RANDOM_SIZE; | |
727 | ||
728 | /* get the session-id */ | |
729 | j= *(p++); | |
730 | ||
731 | s->hit=0; | |
6b0e9fac BM |
732 | /* Versions before 0.9.7 always allow session reuse during renegotiation |
733 | * (i.e. when s->new_session is true), option | |
734 | * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is new with 0.9.7. | |
735 | * Maybe this optional behaviour should always have been the default, | |
736 | * but we cannot safely change the default behaviour (or new applications | |
737 | * might be written that become totally unsecure when compiled with | |
738 | * an earlier library version) | |
739 | */ | |
740 | if (j == 0 || (s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION))) | |
d02b48c6 RE |
741 | { |
742 | if (!ssl_get_new_session(s,1)) | |
743 | goto err; | |
744 | } | |
745 | else | |
746 | { | |
58964a49 | 747 | i=ssl_get_prev_session(s,p,j); |
d02b48c6 RE |
748 | if (i == 1) |
749 | { /* previous session */ | |
750 | s->hit=1; | |
751 | } | |
8876bc05 BM |
752 | else if (i == -1) |
753 | goto err; | |
754 | else /* i == 0 */ | |
d02b48c6 RE |
755 | { |
756 | if (!ssl_get_new_session(s,1)) | |
757 | goto err; | |
758 | } | |
759 | } | |
760 | ||
761 | p+=j; | |
36d16f8e BL |
762 | |
763 | if (SSL_version(s) == DTLS1_VERSION) | |
764 | { | |
765 | /* cookie stuff */ | |
766 | cookie_len = *(p++); | |
767 | ||
beb056b3 BM |
768 | if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) && |
769 | s->d1->send_cookie == 0) | |
770 | { | |
771 | /* HelloVerifyMessage has already been sent */ | |
772 | if ( cookie_len != s->d1->cookie_len) | |
773 | { | |
774 | al = SSL_AD_HANDSHAKE_FAILURE; | |
775 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH); | |
776 | goto f_err; | |
777 | } | |
778 | } | |
779 | ||
780 | /* | |
781 | * The ClientHello may contain a cookie even if the | |
782 | * HelloVerify message has not been sent--make sure that it | |
783 | * does not cause an overflow. | |
784 | */ | |
36d16f8e BL |
785 | if ( cookie_len > sizeof(s->d1->rcvd_cookie)) |
786 | { | |
787 | /* too much data */ | |
beb056b3 | 788 | al = SSL_AD_DECODE_ERROR; |
36d16f8e BL |
789 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH); |
790 | goto f_err; | |
791 | } | |
792 | ||
beb056b3 BM |
793 | /* verify the cookie if appropriate option is set. */ |
794 | if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) && | |
795 | cookie_len > 0) | |
796 | { | |
797 | memcpy(s->d1->rcvd_cookie, p, cookie_len); | |
798 | ||
799 | if ( s->ctx->app_verify_cookie_cb != NULL) | |
800 | { | |
801 | if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie, | |
802 | cookie_len) == 0) | |
803 | { | |
804 | al=SSL_AD_HANDSHAKE_FAILURE; | |
805 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, | |
806 | SSL_R_COOKIE_MISMATCH); | |
807 | goto f_err; | |
808 | } | |
809 | /* else cookie verification succeeded */ | |
810 | } | |
811 | else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie, | |
812 | s->d1->cookie_len) != 0) /* default verification */ | |
813 | { | |
814 | al=SSL_AD_HANDSHAKE_FAILURE; | |
815 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, | |
816 | SSL_R_COOKIE_MISMATCH); | |
817 | goto f_err; | |
818 | } | |
819 | } | |
820 | ||
821 | p += cookie_len; | |
36d16f8e BL |
822 | } |
823 | ||
d02b48c6 RE |
824 | n2s(p,i); |
825 | if ((i == 0) && (j != 0)) | |
826 | { | |
827 | /* we need a cipher if we are not resuming a session */ | |
58964a49 | 828 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
829 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED); |
830 | goto f_err; | |
831 | } | |
82b0bf0b | 832 | if ((p+i) >= (d+n)) |
d02b48c6 RE |
833 | { |
834 | /* not enough data */ | |
58964a49 | 835 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
836 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); |
837 | goto f_err; | |
838 | } | |
839 | if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers)) | |
840 | == NULL)) | |
841 | { | |
842 | goto err; | |
843 | } | |
844 | p+=i; | |
845 | ||
846 | /* If it is a hit, check that the cipher is in the list */ | |
847 | if ((s->hit) && (i > 0)) | |
848 | { | |
849 | j=0; | |
850 | id=s->session->cipher->id; | |
851 | ||
413c4f45 MC |
852 | #ifdef CIPHER_DEBUG |
853 | printf("client sent %d ciphers\n",sk_num(ciphers)); | |
854 | #endif | |
f73e07cf | 855 | for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++) |
d02b48c6 | 856 | { |
f73e07cf | 857 | c=sk_SSL_CIPHER_value(ciphers,i); |
413c4f45 MC |
858 | #ifdef CIPHER_DEBUG |
859 | printf("client [%2d of %2d]:%s\n", | |
860 | i,sk_num(ciphers),SSL_CIPHER_get_name(c)); | |
861 | #endif | |
d02b48c6 RE |
862 | if (c->id == id) |
863 | { | |
864 | j=1; | |
865 | break; | |
866 | } | |
867 | } | |
868 | if (j == 0) | |
869 | { | |
f73e07cf | 870 | if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1)) |
d02b48c6 RE |
871 | { |
872 | /* Very bad for multi-threading.... */ | |
beb056b3 | 873 | s->session->cipher=sk_SSL_CIPHER_value(ciphers, 0); |
d02b48c6 RE |
874 | } |
875 | else | |
876 | { | |
877 | /* we need to have the cipher in the cipher | |
878 | * list if we are asked to reuse it */ | |
58964a49 | 879 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
880 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING); |
881 | goto f_err; | |
882 | } | |
883 | } | |
884 | } | |
885 | ||
886 | /* compression */ | |
887 | i= *(p++); | |
82b0bf0b BM |
888 | if ((p+i) > (d+n)) |
889 | { | |
890 | /* not enough data */ | |
891 | al=SSL_AD_DECODE_ERROR; | |
892 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); | |
893 | goto f_err; | |
894 | } | |
413c4f45 | 895 | q=p; |
d02b48c6 | 896 | for (j=0; j<i; j++) |
413c4f45 | 897 | { |
d02b48c6 | 898 | if (p[j] == 0) break; |
413c4f45 | 899 | } |
d02b48c6 RE |
900 | |
901 | p+=i; | |
902 | if (j >= i) | |
903 | { | |
904 | /* no compress */ | |
58964a49 | 905 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
906 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED); |
907 | goto f_err; | |
908 | } | |
909 | ||
413c4f45 MC |
910 | /* Worst case, we will use the NULL compression, but if we have other |
911 | * options, we will now look for them. We have i-1 compression | |
912 | * algorithms from the client, starting at q. */ | |
913 | s->s3->tmp.new_compression=NULL; | |
09b6c2ef | 914 | #ifndef OPENSSL_NO_COMP |
566dda07 | 915 | if (!(s->options & SSL_OP_NO_COMPRESSION) && s->ctx->comp_methods) |
413c4f45 MC |
916 | { /* See if we have a match */ |
917 | int m,nn,o,v,done=0; | |
918 | ||
f73e07cf | 919 | nn=sk_SSL_COMP_num(s->ctx->comp_methods); |
413c4f45 MC |
920 | for (m=0; m<nn; m++) |
921 | { | |
f73e07cf | 922 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,m); |
413c4f45 MC |
923 | v=comp->id; |
924 | for (o=0; o<i; o++) | |
925 | { | |
926 | if (v == q[o]) | |
927 | { | |
928 | done=1; | |
929 | break; | |
930 | } | |
931 | } | |
932 | if (done) break; | |
933 | } | |
934 | if (done) | |
935 | s->s3->tmp.new_compression=comp; | |
936 | else | |
937 | comp=NULL; | |
938 | } | |
09b6c2ef | 939 | #endif |
413c4f45 | 940 | |
ed3883d2 BM |
941 | #ifndef OPENSSL_NO_TLSEXT |
942 | /* TLS extensions*/ | |
943 | if (s->version > SSL3_VERSION) | |
f1fd4544 BM |
944 | { |
945 | if (!ssl_parse_clienthello_tlsext(s,&p,d,n, &al)) | |
946 | { | |
947 | /* 'al' set by ssl_parse_clienthello_tlsext */ | |
ed3883d2 | 948 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLS_EXT); |
f1fd4544 BM |
949 | goto f_err; |
950 | } | |
ed3883d2 | 951 | } |
ed3883d2 | 952 | #endif |
d02b48c6 | 953 | |
836f9960 | 954 | /* Given s->session->ciphers and SSL_get_ciphers, we must |
d02b48c6 RE |
955 | * pick a cipher */ |
956 | ||
957 | if (!s->hit) | |
958 | { | |
09b6c2ef DSH |
959 | #ifdef OPENSSL_NO_COMP |
960 | s->session->compress_meth=0; | |
961 | #else | |
413c4f45 | 962 | s->session->compress_meth=(comp == NULL)?0:comp->id; |
09b6c2ef | 963 | #endif |
d02b48c6 | 964 | if (s->session->ciphers != NULL) |
f73e07cf | 965 | sk_SSL_CIPHER_free(s->session->ciphers); |
d02b48c6 RE |
966 | s->session->ciphers=ciphers; |
967 | if (ciphers == NULL) | |
968 | { | |
58964a49 | 969 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
970 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED); |
971 | goto f_err; | |
972 | } | |
973 | ciphers=NULL; | |
974 | c=ssl3_choose_cipher(s,s->session->ciphers, | |
836f9960 | 975 | SSL_get_ciphers(s)); |
d02b48c6 RE |
976 | |
977 | if (c == NULL) | |
978 | { | |
58964a49 | 979 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
980 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER); |
981 | goto f_err; | |
982 | } | |
983 | s->s3->tmp.new_cipher=c; | |
984 | } | |
985 | else | |
986 | { | |
987 | /* Session-id reuse */ | |
988 | #ifdef REUSE_CIPHER_BUG | |
f73e07cf | 989 | STACK_OF(SSL_CIPHER) *sk; |
d02b48c6 RE |
990 | SSL_CIPHER *nc=NULL; |
991 | SSL_CIPHER *ec=NULL; | |
992 | ||
58964a49 | 993 | if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG) |
d02b48c6 RE |
994 | { |
995 | sk=s->session->ciphers; | |
f73e07cf | 996 | for (i=0; i<sk_SSL_CIPHER_num(sk); i++) |
d02b48c6 | 997 | { |
f73e07cf | 998 | c=sk_SSL_CIPHER_value(sk,i); |
d02b48c6 RE |
999 | if (c->algorithms & SSL_eNULL) |
1000 | nc=c; | |
06ab81f9 | 1001 | if (SSL_C_IS_EXPORT(c)) |
d02b48c6 RE |
1002 | ec=c; |
1003 | } | |
1004 | if (nc != NULL) | |
1005 | s->s3->tmp.new_cipher=nc; | |
1006 | else if (ec != NULL) | |
1007 | s->s3->tmp.new_cipher=ec; | |
1008 | else | |
1009 | s->s3->tmp.new_cipher=s->session->cipher; | |
1010 | } | |
1011 | else | |
1012 | #endif | |
1013 | s->s3->tmp.new_cipher=s->session->cipher; | |
1014 | } | |
1015 | ||
1016 | /* we now have the following setup. | |
1017 | * client_random | |
1018 | * cipher_list - our prefered list of ciphers | |
1019 | * ciphers - the clients prefered list of ciphers | |
1020 | * compression - basically ignored right now | |
1021 | * ssl version is set - sslv3 | |
1022 | * s->session - The ssl session has been setup. | |
657e60fa | 1023 | * s->hit - session reuse flag |
d02b48c6 RE |
1024 | * s->tmp.new_cipher - the new cipher to use. |
1025 | */ | |
1026 | ||
1027 | ret=1; | |
1028 | if (0) | |
1029 | { | |
1030 | f_err: | |
1031 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1032 | } | |
1033 | err: | |
f73e07cf | 1034 | if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers); |
d02b48c6 RE |
1035 | return(ret); |
1036 | } | |
1037 | ||
36d16f8e | 1038 | int ssl3_send_server_hello(SSL *s) |
d02b48c6 RE |
1039 | { |
1040 | unsigned char *buf; | |
1041 | unsigned char *p,*d; | |
1042 | int i,sl; | |
1043 | unsigned long l,Time; | |
1044 | ||
1045 | if (s->state == SSL3_ST_SW_SRVR_HELLO_A) | |
1046 | { | |
1047 | buf=(unsigned char *)s->init_buf->data; | |
1048 | p=s->s3->server_random; | |
7bbcb2f6 | 1049 | Time=(unsigned long)time(NULL); /* Time */ |
d02b48c6 | 1050 | l2n(Time,p); |
7c7667b8 NL |
1051 | if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) |
1052 | return -1; | |
d02b48c6 RE |
1053 | /* Do the message type and length last */ |
1054 | d=p= &(buf[4]); | |
1055 | ||
58964a49 RE |
1056 | *(p++)=s->version>>8; |
1057 | *(p++)=s->version&0xff; | |
d02b48c6 RE |
1058 | |
1059 | /* Random stuff */ | |
1060 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
1061 | p+=SSL3_RANDOM_SIZE; | |
1062 | ||
1063 | /* now in theory we have 3 options to sending back the | |
1064 | * session id. If it is a re-use, we send back the | |
1065 | * old session-id, if it is a new session, we send | |
1066 | * back the new session-id or we send back a 0 length | |
1067 | * session-id if we want it to be single use. | |
1068 | * Currently I will not implement the '0' length session-id | |
58964a49 | 1069 | * 12-Jan-98 - I'll now support the '0' length stuff. |
d02b48c6 | 1070 | */ |
58964a49 RE |
1071 | if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER)) |
1072 | s->session->session_id_length=0; | |
d02b48c6 RE |
1073 | |
1074 | sl=s->session->session_id_length; | |
27545970 | 1075 | if (sl > (int)sizeof(s->session->session_id)) |
5574e0ed BM |
1076 | { |
1077 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1078 | return -1; | |
1079 | } | |
d02b48c6 RE |
1080 | *(p++)=sl; |
1081 | memcpy(p,s->session->session_id,sl); | |
1082 | p+=sl; | |
1083 | ||
1084 | /* put the cipher */ | |
1085 | i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p); | |
1086 | p+=i; | |
1087 | ||
1088 | /* put the compression method */ | |
09b6c2ef DSH |
1089 | #ifdef OPENSSL_NO_COMP |
1090 | *(p++)=0; | |
1091 | #else | |
413c4f45 MC |
1092 | if (s->s3->tmp.new_compression == NULL) |
1093 | *(p++)=0; | |
1094 | else | |
1095 | *(p++)=s->s3->tmp.new_compression->id; | |
09b6c2ef | 1096 | #endif |
ed3883d2 | 1097 | #ifndef OPENSSL_NO_TLSEXT |
f1fd4544 BM |
1098 | if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) |
1099 | { | |
ed3883d2 BM |
1100 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR); |
1101 | return -1; | |
f1fd4544 | 1102 | } |
ed3883d2 | 1103 | #endif |
d02b48c6 RE |
1104 | |
1105 | /* do the header */ | |
1106 | l=(p-d); | |
1107 | d=buf; | |
1108 | *(d++)=SSL3_MT_SERVER_HELLO; | |
1109 | l2n3(l,d); | |
1110 | ||
1111 | s->state=SSL3_ST_CW_CLNT_HELLO_B; | |
1112 | /* number of bytes to write */ | |
1113 | s->init_num=p-buf; | |
1114 | s->init_off=0; | |
1115 | } | |
1116 | ||
1117 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
1118 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
1119 | } | |
1120 | ||
36d16f8e | 1121 | int ssl3_send_server_done(SSL *s) |
d02b48c6 RE |
1122 | { |
1123 | unsigned char *p; | |
1124 | ||
1125 | if (s->state == SSL3_ST_SW_SRVR_DONE_A) | |
1126 | { | |
1127 | p=(unsigned char *)s->init_buf->data; | |
1128 | ||
1129 | /* do the header */ | |
1130 | *(p++)=SSL3_MT_SERVER_DONE; | |
1131 | *(p++)=0; | |
1132 | *(p++)=0; | |
1133 | *(p++)=0; | |
1134 | ||
1135 | s->state=SSL3_ST_SW_SRVR_DONE_B; | |
1136 | /* number of bytes to write */ | |
1137 | s->init_num=4; | |
1138 | s->init_off=0; | |
1139 | } | |
1140 | ||
1141 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
1142 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
1143 | } | |
1144 | ||
36d16f8e | 1145 | int ssl3_send_server_key_exchange(SSL *s) |
d02b48c6 | 1146 | { |
bc36ee62 | 1147 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1148 | unsigned char *q; |
1149 | int j,num; | |
1150 | RSA *rsa; | |
1151 | unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
752d706a | 1152 | unsigned int u; |
d02b48c6 | 1153 | #endif |
bc36ee62 | 1154 | #ifndef OPENSSL_NO_DH |
9d1a01be | 1155 | DH *dh=NULL,*dhp; |
ea262260 BM |
1156 | #endif |
1157 | #ifndef OPENSSL_NO_ECDH | |
1158 | EC_KEY *ecdh=NULL, *ecdhp; | |
1159 | unsigned char *encodedPoint = NULL; | |
1160 | int encodedlen = 0; | |
1161 | int curve_id = 0; | |
1162 | BN_CTX *bn_ctx = NULL; | |
d02b48c6 RE |
1163 | #endif |
1164 | EVP_PKEY *pkey; | |
1165 | unsigned char *p,*d; | |
1166 | int al,i; | |
1167 | unsigned long type; | |
1168 | int n; | |
1169 | CERT *cert; | |
1170 | BIGNUM *r[4]; | |
1171 | int nr[4],kn; | |
1172 | BUF_MEM *buf; | |
1173 | EVP_MD_CTX md_ctx; | |
1174 | ||
dbad1690 | 1175 | EVP_MD_CTX_init(&md_ctx); |
d02b48c6 RE |
1176 | if (s->state == SSL3_ST_SW_KEY_EXCH_A) |
1177 | { | |
1178 | type=s->s3->tmp.new_cipher->algorithms & SSL_MKEY_MASK; | |
b56bce4f | 1179 | cert=s->cert; |
d02b48c6 RE |
1180 | |
1181 | buf=s->init_buf; | |
1182 | ||
1183 | r[0]=r[1]=r[2]=r[3]=NULL; | |
1184 | n=0; | |
bc36ee62 | 1185 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1186 | if (type & SSL_kRSA) |
1187 | { | |
1188 | rsa=cert->rsa_tmp; | |
ca8e5b9b | 1189 | if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) |
d02b48c6 | 1190 | { |
ca8e5b9b | 1191 | rsa=s->cert->rsa_tmp_cb(s, |
f415fa32 | 1192 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 1193 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
fbb41ae0 DSH |
1194 | if(rsa == NULL) |
1195 | { | |
1196 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1197 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY); | |
1198 | goto f_err; | |
1199 | } | |
6ac4e8bd | 1200 | RSA_up_ref(rsa); |
d02b48c6 RE |
1201 | cert->rsa_tmp=rsa; |
1202 | } | |
1203 | if (rsa == NULL) | |
1204 | { | |
58964a49 | 1205 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1206 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY); |
1207 | goto f_err; | |
1208 | } | |
1209 | r[0]=rsa->n; | |
1210 | r[1]=rsa->e; | |
1211 | s->s3->tmp.use_rsa_tmp=1; | |
1212 | } | |
1213 | else | |
1214 | #endif | |
bc36ee62 | 1215 | #ifndef OPENSSL_NO_DH |
d02b48c6 RE |
1216 | if (type & SSL_kEDH) |
1217 | { | |
1218 | dhp=cert->dh_tmp; | |
ca8e5b9b BM |
1219 | if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL)) |
1220 | dhp=s->cert->dh_tmp_cb(s, | |
2c05c494 | 1221 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 1222 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
d02b48c6 RE |
1223 | if (dhp == NULL) |
1224 | { | |
58964a49 | 1225 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1226 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
1227 | goto f_err; | |
1228 | } | |
a87030a1 BM |
1229 | |
1230 | if (s->s3->tmp.dh != NULL) | |
1231 | { | |
1232 | DH_free(dh); | |
5277d7cb | 1233 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
a87030a1 BM |
1234 | goto err; |
1235 | } | |
1236 | ||
d02b48c6 RE |
1237 | if ((dh=DHparams_dup(dhp)) == NULL) |
1238 | { | |
1239 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1240 | goto err; | |
1241 | } | |
1242 | ||
1243 | s->s3->tmp.dh=dh; | |
6fa89f94 BL |
1244 | if ((dhp->pub_key == NULL || |
1245 | dhp->priv_key == NULL || | |
1246 | (s->options & SSL_OP_SINGLE_DH_USE))) | |
d02b48c6 | 1247 | { |
6fa89f94 BL |
1248 | if(!DH_generate_key(dh)) |
1249 | { | |
1250 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, | |
1251 | ERR_R_DH_LIB); | |
1252 | goto err; | |
1253 | } | |
d02b48c6 RE |
1254 | } |
1255 | else | |
1256 | { | |
1257 | dh->pub_key=BN_dup(dhp->pub_key); | |
1258 | dh->priv_key=BN_dup(dhp->priv_key); | |
1259 | if ((dh->pub_key == NULL) || | |
1260 | (dh->priv_key == NULL)) | |
1261 | { | |
1262 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1263 | goto err; | |
1264 | } | |
1265 | } | |
1266 | r[0]=dh->p; | |
1267 | r[1]=dh->g; | |
1268 | r[2]=dh->pub_key; | |
1269 | } | |
1270 | else | |
1271 | #endif | |
ea262260 BM |
1272 | #ifndef OPENSSL_NO_ECDH |
1273 | if (type & SSL_kECDHE) | |
1274 | { | |
9dd84053 NL |
1275 | const EC_GROUP *group; |
1276 | ||
ea262260 BM |
1277 | ecdhp=cert->ecdh_tmp; |
1278 | if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL)) | |
1279 | { | |
1280 | ecdhp=s->cert->ecdh_tmp_cb(s, | |
1281 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), | |
1282 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); | |
1283 | } | |
1284 | if (ecdhp == NULL) | |
1285 | { | |
1286 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1287 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); | |
1288 | goto f_err; | |
1289 | } | |
1290 | ||
1291 | if (s->s3->tmp.ecdh != NULL) | |
1292 | { | |
1293 | EC_KEY_free(s->s3->tmp.ecdh); | |
1294 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
1295 | goto err; | |
1296 | } | |
1297 | ||
1298 | /* Duplicate the ECDH structure. */ | |
1299 | if (ecdhp == NULL) | |
1300 | { | |
1301 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1302 | goto err; | |
1303 | } | |
1304 | if (!EC_KEY_up_ref(ecdhp)) | |
1305 | { | |
aa4ce731 | 1306 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); |
ea262260 BM |
1307 | goto err; |
1308 | } | |
1309 | ecdh = ecdhp; | |
1310 | ||
1311 | s->s3->tmp.ecdh=ecdh; | |
9dd84053 NL |
1312 | if ((EC_KEY_get0_public_key(ecdh) == NULL) || |
1313 | (EC_KEY_get0_private_key(ecdh) == NULL) || | |
ea262260 BM |
1314 | (s->options & SSL_OP_SINGLE_ECDH_USE)) |
1315 | { | |
1316 | if(!EC_KEY_generate_key(ecdh)) | |
1317 | { | |
1318 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1319 | goto err; | |
1320 | } | |
1321 | } | |
1322 | ||
9dd84053 NL |
1323 | if (((group = EC_KEY_get0_group(ecdh)) == NULL) || |
1324 | (EC_KEY_get0_public_key(ecdh) == NULL) || | |
1325 | (EC_KEY_get0_private_key(ecdh) == NULL)) | |
ea262260 BM |
1326 | { |
1327 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1328 | goto err; | |
1329 | } | |
1330 | ||
1331 | if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && | |
9dd84053 | 1332 | (EC_GROUP_get_degree(group) > 163)) |
ea262260 BM |
1333 | { |
1334 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); | |
1335 | goto err; | |
1336 | } | |
1337 | ||
1338 | /* XXX: For now, we only support ephemeral ECDH | |
1339 | * keys over named (not generic) curves. For | |
1340 | * supported named curves, curve_id is non-zero. | |
1341 | */ | |
1342 | if ((curve_id = | |
9dd84053 | 1343 | nid2curve_id(EC_GROUP_get_curve_name(group))) |
ea262260 BM |
1344 | == 0) |
1345 | { | |
1346 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE); | |
1347 | goto err; | |
1348 | } | |
1349 | ||
1350 | /* Encode the public key. | |
1351 | * First check the size of encoding and | |
1352 | * allocate memory accordingly. | |
1353 | */ | |
9dd84053 NL |
1354 | encodedlen = EC_POINT_point2oct(group, |
1355 | EC_KEY_get0_public_key(ecdh), | |
ea262260 BM |
1356 | POINT_CONVERSION_UNCOMPRESSED, |
1357 | NULL, 0, NULL); | |
1358 | ||
1359 | encodedPoint = (unsigned char *) | |
1360 | OPENSSL_malloc(encodedlen*sizeof(unsigned char)); | |
1361 | bn_ctx = BN_CTX_new(); | |
1362 | if ((encodedPoint == NULL) || (bn_ctx == NULL)) | |
1363 | { | |
1364 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); | |
1365 | goto err; | |
1366 | } | |
1367 | ||
1368 | ||
9dd84053 NL |
1369 | encodedlen = EC_POINT_point2oct(group, |
1370 | EC_KEY_get0_public_key(ecdh), | |
ea262260 BM |
1371 | POINT_CONVERSION_UNCOMPRESSED, |
1372 | encodedPoint, encodedlen, bn_ctx); | |
1373 | ||
1374 | if (encodedlen == 0) | |
1375 | { | |
1376 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1377 | goto err; | |
1378 | } | |
1379 | ||
1380 | BN_CTX_free(bn_ctx); bn_ctx=NULL; | |
1381 | ||
1382 | /* XXX: For now, we only support named (not | |
1383 | * generic) curves in ECDH ephemeral key exchanges. | |
d56349a2 | 1384 | * In this situation, we need four additional bytes |
ea262260 BM |
1385 | * to encode the entire ServerECDHParams |
1386 | * structure. | |
1387 | */ | |
d56349a2 | 1388 | n = 4 + encodedlen; |
ea262260 BM |
1389 | |
1390 | /* We'll generate the serverKeyExchange message | |
1391 | * explicitly so we can set these to NULLs | |
1392 | */ | |
1393 | r[0]=NULL; | |
1394 | r[1]=NULL; | |
1395 | r[2]=NULL; | |
d56349a2 | 1396 | r[3]=NULL; |
ea262260 BM |
1397 | } |
1398 | else | |
1399 | #endif /* !OPENSSL_NO_ECDH */ | |
d02b48c6 | 1400 | { |
58964a49 | 1401 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1402 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); |
1403 | goto f_err; | |
1404 | } | |
1405 | for (i=0; r[i] != NULL; i++) | |
1406 | { | |
1407 | nr[i]=BN_num_bytes(r[i]); | |
1408 | n+=2+nr[i]; | |
1409 | } | |
1410 | ||
1411 | if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) | |
1412 | { | |
1413 | if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher)) | |
1414 | == NULL) | |
1415 | { | |
58964a49 | 1416 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1417 | goto f_err; |
1418 | } | |
1419 | kn=EVP_PKEY_size(pkey); | |
1420 | } | |
1421 | else | |
1422 | { | |
1423 | pkey=NULL; | |
1424 | kn=0; | |
1425 | } | |
1426 | ||
54a656ef | 1427 | if (!BUF_MEM_grow_clean(buf,n+4+kn)) |
d02b48c6 RE |
1428 | { |
1429 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF); | |
1430 | goto err; | |
1431 | } | |
1432 | d=(unsigned char *)s->init_buf->data; | |
1433 | p= &(d[4]); | |
1434 | ||
1435 | for (i=0; r[i] != NULL; i++) | |
1436 | { | |
1437 | s2n(nr[i],p); | |
1438 | BN_bn2bin(r[i],p); | |
1439 | p+=nr[i]; | |
1440 | } | |
1441 | ||
ea262260 BM |
1442 | #ifndef OPENSSL_NO_ECDH |
1443 | if (type & SSL_kECDHE) | |
1444 | { | |
1445 | /* XXX: For now, we only support named (not generic) curves. | |
1446 | * In this situation, the serverKeyExchange message has: | |
d56349a2 | 1447 | * [1 byte CurveType], [2 byte CurveName] |
ea262260 BM |
1448 | * [1 byte length of encoded point], followed by |
1449 | * the actual encoded point itself | |
1450 | */ | |
1451 | *p = NAMED_CURVE_TYPE; | |
1452 | p += 1; | |
d56349a2 BM |
1453 | *p = 0; |
1454 | p += 1; | |
ea262260 BM |
1455 | *p = curve_id; |
1456 | p += 1; | |
1457 | *p = encodedlen; | |
1458 | p += 1; | |
1459 | memcpy((unsigned char*)p, | |
1460 | (unsigned char *)encodedPoint, | |
1461 | encodedlen); | |
1462 | OPENSSL_free(encodedPoint); | |
1463 | p += encodedlen; | |
1464 | } | |
1465 | #endif | |
1466 | ||
d02b48c6 RE |
1467 | /* not anonymous */ |
1468 | if (pkey != NULL) | |
1469 | { | |
1470 | /* n is the length of the params, they start at &(d[4]) | |
1471 | * and p points to the space at the end. */ | |
bc36ee62 | 1472 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1473 | if (pkey->type == EVP_PKEY_RSA) |
1474 | { | |
1475 | q=md_buf; | |
1476 | j=0; | |
1477 | for (num=2; num > 0; num--) | |
1478 | { | |
20d2186c DSH |
1479 | EVP_DigestInit_ex(&md_ctx,(num == 2) |
1480 | ?s->ctx->md5:s->ctx->sha1, NULL); | |
d02b48c6 RE |
1481 | EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
1482 | EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1483 | EVP_DigestUpdate(&md_ctx,&(d[4]),n); | |
20d2186c | 1484 | EVP_DigestFinal_ex(&md_ctx,q, |
d02b48c6 RE |
1485 | (unsigned int *)&i); |
1486 | q+=i; | |
1487 | j+=i; | |
1488 | } | |
1c80019a | 1489 | if (RSA_sign(NID_md5_sha1, md_buf, j, |
ca7fea96 | 1490 | &(p[2]), &u, pkey->pkey.rsa) <= 0) |
d02b48c6 RE |
1491 | { |
1492 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA); | |
1493 | goto err; | |
1494 | } | |
ca7fea96 BL |
1495 | s2n(u,p); |
1496 | n+=u+2; | |
d02b48c6 RE |
1497 | } |
1498 | else | |
1499 | #endif | |
bc36ee62 | 1500 | #if !defined(OPENSSL_NO_DSA) |
d02b48c6 RE |
1501 | if (pkey->type == EVP_PKEY_DSA) |
1502 | { | |
1503 | /* lets do DSS */ | |
20d2186c | 1504 | EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL); |
d02b48c6 RE |
1505 | EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
1506 | EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1507 | EVP_SignUpdate(&md_ctx,&(d[4]),n); | |
1508 | if (!EVP_SignFinal(&md_ctx,&(p[2]), | |
1509 | (unsigned int *)&i,pkey)) | |
1510 | { | |
1511 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA); | |
1512 | goto err; | |
1513 | } | |
1514 | s2n(i,p); | |
1515 | n+=i+2; | |
1516 | } | |
1517 | else | |
ea262260 BM |
1518 | #endif |
1519 | #if !defined(OPENSSL_NO_ECDSA) | |
5488bb61 | 1520 | if (pkey->type == EVP_PKEY_EC) |
ea262260 BM |
1521 | { |
1522 | /* let's do ECDSA */ | |
1523 | EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL); | |
1524 | EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); | |
1525 | EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1526 | EVP_SignUpdate(&md_ctx,&(d[4]),n); | |
1527 | if (!EVP_SignFinal(&md_ctx,&(p[2]), | |
1528 | (unsigned int *)&i,pkey)) | |
1529 | { | |
1530 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA); | |
1531 | goto err; | |
1532 | } | |
1533 | s2n(i,p); | |
1534 | n+=i+2; | |
1535 | } | |
1536 | else | |
d02b48c6 RE |
1537 | #endif |
1538 | { | |
1539 | /* Is this error check actually needed? */ | |
58964a49 | 1540 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1541 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE); |
1542 | goto f_err; | |
1543 | } | |
1544 | } | |
1545 | ||
1546 | *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE; | |
1547 | l2n3(n,d); | |
1548 | ||
1549 | /* we should now have things packed up, so lets send | |
1550 | * it off */ | |
1551 | s->init_num=n+4; | |
1552 | s->init_off=0; | |
1553 | } | |
1554 | ||
a87030a1 | 1555 | s->state = SSL3_ST_SW_KEY_EXCH_B; |
dbad1690 | 1556 | EVP_MD_CTX_cleanup(&md_ctx); |
d02b48c6 RE |
1557 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
1558 | f_err: | |
1559 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1560 | err: | |
ea262260 BM |
1561 | #ifndef OPENSSL_NO_ECDH |
1562 | if (encodedPoint != NULL) OPENSSL_free(encodedPoint); | |
1563 | BN_CTX_free(bn_ctx); | |
1564 | #endif | |
dbad1690 | 1565 | EVP_MD_CTX_cleanup(&md_ctx); |
d02b48c6 RE |
1566 | return(-1); |
1567 | } | |
1568 | ||
36d16f8e | 1569 | int ssl3_send_certificate_request(SSL *s) |
d02b48c6 RE |
1570 | { |
1571 | unsigned char *p,*d; | |
1572 | int i,j,nl,off,n; | |
f73e07cf | 1573 | STACK_OF(X509_NAME) *sk=NULL; |
d02b48c6 RE |
1574 | X509_NAME *name; |
1575 | BUF_MEM *buf; | |
1576 | ||
1577 | if (s->state == SSL3_ST_SW_CERT_REQ_A) | |
1578 | { | |
1579 | buf=s->init_buf; | |
1580 | ||
1581 | d=p=(unsigned char *)&(buf->data[4]); | |
1582 | ||
1583 | /* get the list of acceptable cert types */ | |
1584 | p++; | |
1585 | n=ssl3_get_req_cert_type(s,p); | |
1586 | d[0]=n; | |
1587 | p+=n; | |
1588 | n++; | |
1589 | ||
1590 | off=n; | |
1591 | p+=2; | |
1592 | n+=2; | |
1593 | ||
1594 | sk=SSL_get_client_CA_list(s); | |
1595 | nl=0; | |
1596 | if (sk != NULL) | |
1597 | { | |
f73e07cf | 1598 | for (i=0; i<sk_X509_NAME_num(sk); i++) |
d02b48c6 | 1599 | { |
f73e07cf | 1600 | name=sk_X509_NAME_value(sk,i); |
d02b48c6 | 1601 | j=i2d_X509_NAME(name,NULL); |
54a656ef | 1602 | if (!BUF_MEM_grow_clean(buf,4+n+j+2)) |
d02b48c6 RE |
1603 | { |
1604 | SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); | |
1605 | goto err; | |
1606 | } | |
1607 | p=(unsigned char *)&(buf->data[4+n]); | |
58964a49 | 1608 | if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) |
d02b48c6 RE |
1609 | { |
1610 | s2n(j,p); | |
1611 | i2d_X509_NAME(name,&p); | |
1612 | n+=2+j; | |
1613 | nl+=2+j; | |
1614 | } | |
1615 | else | |
1616 | { | |
1617 | d=p; | |
1618 | i2d_X509_NAME(name,&p); | |
1619 | j-=2; s2n(j,d); j+=2; | |
1620 | n+=j; | |
1621 | nl+=j; | |
1622 | } | |
1623 | } | |
1624 | } | |
1625 | /* else no CA names */ | |
1626 | p=(unsigned char *)&(buf->data[4+off]); | |
1627 | s2n(nl,p); | |
1628 | ||
1629 | d=(unsigned char *)buf->data; | |
1630 | *(d++)=SSL3_MT_CERTIFICATE_REQUEST; | |
1631 | l2n3(n,d); | |
1632 | ||
1633 | /* we should now have things packed up, so lets send | |
1634 | * it off */ | |
1635 | ||
1636 | s->init_num=n+4; | |
1637 | s->init_off=0; | |
de469ef2 DSH |
1638 | #ifdef NETSCAPE_HANG_BUG |
1639 | p=(unsigned char *)s->init_buf->data + s->init_num; | |
1640 | ||
1641 | /* do the header */ | |
1642 | *(p++)=SSL3_MT_SERVER_DONE; | |
1643 | *(p++)=0; | |
1644 | *(p++)=0; | |
1645 | *(p++)=0; | |
1646 | s->init_num += 4; | |
1647 | #endif | |
1648 | ||
e59659dc | 1649 | s->state = SSL3_ST_SW_CERT_REQ_B; |
d02b48c6 RE |
1650 | } |
1651 | ||
1652 | /* SSL3_ST_SW_CERT_REQ_B */ | |
1653 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
1654 | err: | |
1655 | return(-1); | |
1656 | } | |
1657 | ||
36d16f8e | 1658 | int ssl3_get_client_key_exchange(SSL *s) |
d02b48c6 RE |
1659 | { |
1660 | int i,al,ok; | |
1661 | long n; | |
1662 | unsigned long l; | |
1663 | unsigned char *p; | |
bc36ee62 | 1664 | #ifndef OPENSSL_NO_RSA |
d02b48c6 | 1665 | RSA *rsa=NULL; |
d02b48c6 | 1666 | EVP_PKEY *pkey=NULL; |
79df9d62 | 1667 | #endif |
bc36ee62 | 1668 | #ifndef OPENSSL_NO_DH |
58964a49 | 1669 | BIGNUM *pub=NULL; |
d02b48c6 | 1670 | DH *dh_srvr; |
58964a49 | 1671 | #endif |
bc36ee62 | 1672 | #ifndef OPENSSL_NO_KRB5 |
f9b3bff6 | 1673 | KSSL_ERR kssl_err; |
bc36ee62 | 1674 | #endif /* OPENSSL_NO_KRB5 */ |
d02b48c6 | 1675 | |
ea262260 BM |
1676 | #ifndef OPENSSL_NO_ECDH |
1677 | EC_KEY *srvr_ecdh = NULL; | |
1678 | EVP_PKEY *clnt_pub_pkey = NULL; | |
1679 | EC_POINT *clnt_ecpoint = NULL; | |
1680 | BN_CTX *bn_ctx = NULL; | |
1681 | #endif | |
1682 | ||
36d16f8e | 1683 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
1684 | SSL3_ST_SR_KEY_EXCH_A, |
1685 | SSL3_ST_SR_KEY_EXCH_B, | |
1686 | SSL3_MT_CLIENT_KEY_EXCHANGE, | |
73969585 | 1687 | 2048, /* ??? */ |
d02b48c6 RE |
1688 | &ok); |
1689 | ||
1690 | if (!ok) return((int)n); | |
48948d53 | 1691 | p=(unsigned char *)s->init_msg; |
d02b48c6 RE |
1692 | |
1693 | l=s->s3->tmp.new_cipher->algorithms; | |
1694 | ||
bc36ee62 | 1695 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1696 | if (l & SSL_kRSA) |
1697 | { | |
1698 | /* FIX THIS UP EAY EAY EAY EAY */ | |
1699 | if (s->s3->tmp.use_rsa_tmp) | |
1700 | { | |
b56bce4f | 1701 | if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL)) |
ca8e5b9b | 1702 | rsa=s->cert->rsa_tmp; |
d02b48c6 RE |
1703 | /* Don't do a callback because rsa_tmp should |
1704 | * be sent already */ | |
1705 | if (rsa == NULL) | |
1706 | { | |
58964a49 | 1707 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1708 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY); |
1709 | goto f_err; | |
1710 | ||
1711 | } | |
1712 | } | |
1713 | else | |
1714 | { | |
1715 | pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey; | |
1716 | if ( (pkey == NULL) || | |
1717 | (pkey->type != EVP_PKEY_RSA) || | |
1718 | (pkey->pkey.rsa == NULL)) | |
1719 | { | |
58964a49 | 1720 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1721 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE); |
1722 | goto f_err; | |
1723 | } | |
1724 | rsa=pkey->pkey.rsa; | |
1725 | } | |
1726 | ||
58964a49 RE |
1727 | /* TLS */ |
1728 | if (s->version > SSL3_VERSION) | |
1729 | { | |
1730 | n2s(p,i); | |
1731 | if (n != i+2) | |
1732 | { | |
1733 | if (!(s->options & SSL_OP_TLS_D5_BUG)) | |
1734 | { | |
1735 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG); | |
1736 | goto err; | |
1737 | } | |
1738 | else | |
1739 | p-=2; | |
1740 | } | |
1741 | else | |
1742 | n=i; | |
1743 | } | |
1744 | ||
d02b48c6 | 1745 | i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING); |
58964a49 | 1746 | |
31bc51c8 BM |
1747 | al = -1; |
1748 | ||
d02b48c6 RE |
1749 | if (i != SSL_MAX_MASTER_KEY_LENGTH) |
1750 | { | |
1751 | al=SSL_AD_DECODE_ERROR; | |
02da5bcd | 1752 | /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */ |
d02b48c6 RE |
1753 | } |
1754 | ||
31bc51c8 | 1755 | if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff)))) |
d02b48c6 | 1756 | { |
2c05c494 BM |
1757 | /* The premaster secret must contain the same version number as the |
1758 | * ClientHello to detect version rollback attacks (strangely, the | |
1759 | * protocol does not offer such protection for DH ciphersuites). | |
1760 | * However, buggy clients exist that send the negotiated protocol | |
93d8bfcd | 1761 | * version instead if the server does not support the requested |
2c05c494 BM |
1762 | * protocol version. |
1763 | * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */ | |
1764 | if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) && | |
1765 | (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff)))) | |
1766 | { | |
1767 | al=SSL_AD_DECODE_ERROR; | |
02da5bcd BM |
1768 | /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */ |
1769 | ||
1770 | /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack | |
1771 | * (http://eprint.iacr.org/2003/052/) exploits the version | |
1772 | * number check as a "bad version oracle" -- an alert would | |
1773 | * reveal that the plaintext corresponding to some ciphertext | |
1774 | * made up by the adversary is properly formatted except | |
1775 | * that the version number is wrong. To avoid such attacks, | |
1776 | * we should treat this just like any other decryption error. */ | |
2c05c494 | 1777 | } |
d02b48c6 | 1778 | } |
d02b48c6 | 1779 | |
31bc51c8 BM |
1780 | if (al != -1) |
1781 | { | |
31bc51c8 BM |
1782 | /* Some decryption failure -- use random value instead as countermeasure |
1783 | * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding | |
02da5bcd | 1784 | * (see RFC 2246, section 7.4.7.1). */ |
31bc51c8 BM |
1785 | ERR_clear_error(); |
1786 | i = SSL_MAX_MASTER_KEY_LENGTH; | |
1787 | p[0] = s->client_version >> 8; | |
1788 | p[1] = s->client_version & 0xff; | |
7c7667b8 NL |
1789 | if (RAND_pseudo_bytes(p+2, i-2) <= 0) /* should be RAND_bytes, but we cannot work around a failure */ |
1790 | goto err; | |
31bc51c8 BM |
1791 | } |
1792 | ||
d02b48c6 | 1793 | s->session->master_key_length= |
58964a49 | 1794 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 RE |
1795 | s->session->master_key, |
1796 | p,i); | |
43d60164 | 1797 | OPENSSL_cleanse(p,i); |
d02b48c6 RE |
1798 | } |
1799 | else | |
4c5fac4a | 1800 | #endif |
bc36ee62 | 1801 | #ifndef OPENSSL_NO_DH |
d02b48c6 RE |
1802 | if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) |
1803 | { | |
d02b48c6 RE |
1804 | n2s(p,i); |
1805 | if (n != i+2) | |
1806 | { | |
58964a49 | 1807 | if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG)) |
d02b48c6 RE |
1808 | { |
1809 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG); | |
1810 | goto err; | |
1811 | } | |
1812 | else | |
1813 | { | |
1814 | p-=2; | |
1815 | i=(int)n; | |
1816 | } | |
1817 | } | |
1818 | ||
1819 | if (n == 0L) /* the parameters are in the cert */ | |
1820 | { | |
58964a49 | 1821 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1822 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS); |
1823 | goto f_err; | |
1824 | } | |
1825 | else | |
1826 | { | |
1827 | if (s->s3->tmp.dh == NULL) | |
1828 | { | |
58964a49 | 1829 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1830 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
1831 | goto f_err; | |
1832 | } | |
1833 | else | |
1834 | dh_srvr=s->s3->tmp.dh; | |
1835 | } | |
1836 | ||
1837 | pub=BN_bin2bn(p,i,NULL); | |
1838 | if (pub == NULL) | |
1839 | { | |
1840 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB); | |
1841 | goto err; | |
1842 | } | |
58964a49 | 1843 | |
d02b48c6 RE |
1844 | i=DH_compute_key(p,pub,dh_srvr); |
1845 | ||
1846 | if (i <= 0) | |
1847 | { | |
1848 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1849 | goto err; | |
1850 | } | |
1851 | ||
1852 | DH_free(s->s3->tmp.dh); | |
1853 | s->s3->tmp.dh=NULL; | |
1854 | ||
1855 | BN_clear_free(pub); | |
1856 | pub=NULL; | |
1857 | s->session->master_key_length= | |
58964a49 | 1858 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 | 1859 | s->session->master_key,p,i); |
43d60164 | 1860 | OPENSSL_cleanse(p,i); |
d02b48c6 RE |
1861 | } |
1862 | else | |
1863 | #endif | |
bc36ee62 | 1864 | #ifndef OPENSSL_NO_KRB5 |
f9b3bff6 RL |
1865 | if (l & SSL_kKRB5) |
1866 | { | |
2a1ef754 RL |
1867 | krb5_error_code krb5rc; |
1868 | krb5_data enc_ticket; | |
1869 | krb5_data authenticator; | |
1870 | krb5_data enc_pms; | |
1871 | KSSL_CTX *kssl_ctx = s->kssl_ctx; | |
1872 | EVP_CIPHER_CTX ciph_ctx; | |
1873 | EVP_CIPHER *enc = NULL; | |
1874 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
acdf4afb | 1875 | unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH |
c046fffa LJ |
1876 | + EVP_MAX_BLOCK_LENGTH]; |
1877 | int padl, outl; | |
2a1ef754 RL |
1878 | krb5_timestamp authtime = 0; |
1879 | krb5_ticket_times ttimes; | |
f9b3bff6 | 1880 | |
de941e28 DSH |
1881 | EVP_CIPHER_CTX_init(&ciph_ctx); |
1882 | ||
f9b3bff6 | 1883 | if (!kssl_ctx) kssl_ctx = kssl_ctx_new(); |
2a1ef754 RL |
1884 | |
1885 | n2s(p,i); | |
1886 | enc_ticket.length = i; | |
9e5790ce NL |
1887 | |
1888 | if (n < enc_ticket.length + 6) | |
1889 | { | |
1890 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
1891 | SSL_R_DATA_LENGTH_TOO_LONG); | |
1892 | goto err; | |
1893 | } | |
1894 | ||
0b4c91c0 | 1895 | enc_ticket.data = (char *)p; |
2a1ef754 RL |
1896 | p+=enc_ticket.length; |
1897 | ||
1898 | n2s(p,i); | |
1899 | authenticator.length = i; | |
9e5790ce NL |
1900 | |
1901 | if (n < enc_ticket.length + authenticator.length + 6) | |
1902 | { | |
1903 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
1904 | SSL_R_DATA_LENGTH_TOO_LONG); | |
1905 | goto err; | |
1906 | } | |
1907 | ||
0b4c91c0 | 1908 | authenticator.data = (char *)p; |
2a1ef754 RL |
1909 | p+=authenticator.length; |
1910 | ||
1911 | n2s(p,i); | |
1912 | enc_pms.length = i; | |
0b4c91c0 | 1913 | enc_pms.data = (char *)p; |
2a1ef754 RL |
1914 | p+=enc_pms.length; |
1915 | ||
c046fffa LJ |
1916 | /* Note that the length is checked again below, |
1917 | ** after decryption | |
1918 | */ | |
dd7ab82e | 1919 | if(enc_pms.length > sizeof pms) |
c046fffa LJ |
1920 | { |
1921 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
1922 | SSL_R_DATA_LENGTH_TOO_LONG); | |
1923 | goto err; | |
1924 | } | |
1925 | ||
0858b71b DSH |
1926 | if (n != (long)(enc_ticket.length + authenticator.length + |
1927 | enc_pms.length + 6)) | |
2a1ef754 RL |
1928 | { |
1929 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
1930 | SSL_R_DATA_LENGTH_TOO_LONG); | |
1931 | goto err; | |
1932 | } | |
1933 | ||
1934 | if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes, | |
1935 | &kssl_err)) != 0) | |
f9b3bff6 RL |
1936 | { |
1937 | #ifdef KSSL_DEBUG | |
1938 | printf("kssl_sget_tkt rtn %d [%d]\n", | |
1939 | krb5rc, kssl_err.reason); | |
1940 | if (kssl_err.text) | |
1941 | printf("kssl_err text= %s\n", kssl_err.text); | |
1942 | #endif /* KSSL_DEBUG */ | |
aa4ce731 | 1943 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
f9b3bff6 RL |
1944 | kssl_err.reason); |
1945 | goto err; | |
1946 | } | |
1947 | ||
2a1ef754 RL |
1948 | /* Note: no authenticator is not considered an error, |
1949 | ** but will return authtime == 0. | |
1950 | */ | |
1951 | if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator, | |
1952 | &authtime, &kssl_err)) != 0) | |
1953 | { | |
1954 | #ifdef KSSL_DEBUG | |
1955 | printf("kssl_check_authent rtn %d [%d]\n", | |
1956 | krb5rc, kssl_err.reason); | |
1957 | if (kssl_err.text) | |
1958 | printf("kssl_err text= %s\n", kssl_err.text); | |
1959 | #endif /* KSSL_DEBUG */ | |
aa4ce731 | 1960 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2a1ef754 RL |
1961 | kssl_err.reason); |
1962 | goto err; | |
1963 | } | |
1964 | ||
1965 | if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0) | |
1966 | { | |
aa4ce731 | 1967 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc); |
2a1ef754 RL |
1968 | goto err; |
1969 | } | |
1970 | ||
f9b3bff6 RL |
1971 | #ifdef KSSL_DEBUG |
1972 | kssl_ctx_show(kssl_ctx); | |
1973 | #endif /* KSSL_DEBUG */ | |
1974 | ||
2a1ef754 | 1975 | enc = kssl_map_enc(kssl_ctx->enctype); |
882e8912 RL |
1976 | if (enc == NULL) |
1977 | goto err; | |
1978 | ||
54a656ef | 1979 | memset(iv, 0, sizeof iv); /* per RFC 1510 */ |
2a1ef754 | 1980 | |
db6a87d8 | 1981 | if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv)) |
acdf4afb RL |
1982 | { |
1983 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
1984 | SSL_R_DECRYPTION_FAILED); | |
1985 | goto err; | |
1986 | } | |
1987 | if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl, | |
0b4c91c0 | 1988 | (unsigned char *)enc_pms.data, enc_pms.length)) |
acdf4afb RL |
1989 | { |
1990 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
1991 | SSL_R_DECRYPTION_FAILED); | |
1992 | goto err; | |
1993 | } | |
2a1ef754 RL |
1994 | if (outl > SSL_MAX_MASTER_KEY_LENGTH) |
1995 | { | |
1996 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
1997 | SSL_R_DATA_LENGTH_TOO_LONG); | |
1998 | goto err; | |
1999 | } | |
581f1c84 | 2000 | if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl)) |
acdf4afb RL |
2001 | { |
2002 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2003 | SSL_R_DECRYPTION_FAILED); | |
2004 | goto err; | |
2005 | } | |
2a1ef754 RL |
2006 | outl += padl; |
2007 | if (outl > SSL_MAX_MASTER_KEY_LENGTH) | |
2008 | { | |
2009 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2010 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2011 | goto err; | |
2012 | } | |
2013 | EVP_CIPHER_CTX_cleanup(&ciph_ctx); | |
2014 | ||
f9b3bff6 RL |
2015 | s->session->master_key_length= |
2016 | s->method->ssl3_enc->generate_master_secret(s, | |
2a1ef754 RL |
2017 | s->session->master_key, pms, outl); |
2018 | ||
882e8912 RL |
2019 | if (kssl_ctx->client_princ) |
2020 | { | |
2021 | int len = strlen(kssl_ctx->client_princ); | |
2022 | if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH ) | |
2023 | { | |
2024 | s->session->krb5_client_princ_len = len; | |
2025 | memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len); | |
2026 | } | |
2027 | } | |
2028 | ||
2029 | ||
2a1ef754 RL |
2030 | /* Was doing kssl_ctx_free() here, |
2031 | ** but it caused problems for apache. | |
2032 | ** kssl_ctx = kssl_ctx_free(kssl_ctx); | |
2033 | ** if (s->kssl_ctx) s->kssl_ctx = NULL; | |
f9b3bff6 RL |
2034 | */ |
2035 | } | |
2036 | else | |
bc36ee62 | 2037 | #endif /* OPENSSL_NO_KRB5 */ |
ea262260 BM |
2038 | |
2039 | #ifndef OPENSSL_NO_ECDH | |
2040 | if ((l & SSL_kECDH) || (l & SSL_kECDHE)) | |
2041 | { | |
2042 | int ret = 1; | |
968766ca | 2043 | int field_size = 0; |
9dd84053 NL |
2044 | const EC_KEY *tkey; |
2045 | const EC_GROUP *group; | |
2046 | const BIGNUM *priv_key; | |
ea262260 BM |
2047 | |
2048 | /* initialize structures for server's ECDH key pair */ | |
2049 | if ((srvr_ecdh = EC_KEY_new()) == NULL) | |
2050 | { | |
2051 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2052 | ERR_R_MALLOC_FAILURE); | |
2053 | goto err; | |
2054 | } | |
2055 | ||
2056 | /* Let's get server private key and group information */ | |
2057 | if (l & SSL_kECDH) | |
2058 | { | |
2059 | /* use the certificate */ | |
9dd84053 | 2060 | tkey = s->cert->key->privatekey->pkey.ec; |
ea262260 BM |
2061 | } |
2062 | else | |
2063 | { | |
2064 | /* use the ephermeral values we saved when | |
2065 | * generating the ServerKeyExchange msg. | |
2066 | */ | |
9dd84053 NL |
2067 | tkey = s->s3->tmp.ecdh; |
2068 | } | |
2069 | ||
2070 | group = EC_KEY_get0_group(tkey); | |
2071 | priv_key = EC_KEY_get0_private_key(tkey); | |
2072 | ||
2073 | if (!EC_KEY_set_group(srvr_ecdh, group) || | |
2074 | !EC_KEY_set_private_key(srvr_ecdh, priv_key)) | |
2075 | { | |
2076 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2077 | ERR_R_EC_LIB); | |
2078 | goto err; | |
ea262260 BM |
2079 | } |
2080 | ||
2081 | /* Let's get client's public key */ | |
9dd84053 | 2082 | if ((clnt_ecpoint = EC_POINT_new(group)) == NULL) |
ea262260 BM |
2083 | { |
2084 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2085 | ERR_R_MALLOC_FAILURE); | |
2086 | goto err; | |
2087 | } | |
2088 | ||
2089 | if (n == 0L) | |
2090 | { | |
2091 | /* Client Publickey was in Client Certificate */ | |
2092 | ||
2093 | if (l & SSL_kECDHE) | |
2094 | { | |
2095 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2096 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); | |
2097 | goto f_err; | |
2098 | } | |
2099 | if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer)) | |
2100 | == NULL) || | |
5488bb61 | 2101 | (clnt_pub_pkey->type != EVP_PKEY_EC)) |
ea262260 BM |
2102 | { |
2103 | /* XXX: For now, we do not support client | |
2104 | * authentication using ECDH certificates | |
2105 | * so this branch (n == 0L) of the code is | |
2106 | * never executed. When that support is | |
2107 | * added, we ought to ensure the key | |
2108 | * received in the certificate is | |
2109 | * authorized for key agreement. | |
2110 | * ECDH_compute_key implicitly checks that | |
2111 | * the two ECDH shares are for the same | |
2112 | * group. | |
2113 | */ | |
2114 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2115 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2116 | SSL_R_UNABLE_TO_DECODE_ECDH_CERTS); | |
2117 | goto f_err; | |
2118 | } | |
2119 | ||
2120 | EC_POINT_copy(clnt_ecpoint, | |
9dd84053 | 2121 | EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec)); |
ea262260 BM |
2122 | ret = 2; /* Skip certificate verify processing */ |
2123 | } | |
2124 | else | |
2125 | { | |
2126 | /* Get client's public key from encoded point | |
2127 | * in the ClientKeyExchange message. | |
2128 | */ | |
2129 | if ((bn_ctx = BN_CTX_new()) == NULL) | |
2130 | { | |
2131 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2132 | ERR_R_MALLOC_FAILURE); | |
2133 | goto err; | |
2134 | } | |
2135 | ||
2136 | /* Get encoded point length */ | |
2137 | i = *p; | |
2138 | p += 1; | |
9dd84053 | 2139 | if (EC_POINT_oct2point(group, |
ea262260 BM |
2140 | clnt_ecpoint, p, i, bn_ctx) == 0) |
2141 | { | |
2142 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2143 | ERR_R_EC_LIB); | |
2144 | goto err; | |
2145 | } | |
2146 | /* p is pointing to somewhere in the buffer | |
2147 | * currently, so set it to the start | |
2148 | */ | |
2149 | p=(unsigned char *)s->init_buf->data; | |
2150 | } | |
2151 | ||
2152 | /* Compute the shared pre-master secret */ | |
9dd84053 | 2153 | field_size = EC_GROUP_get_degree(group); |
968766ca BM |
2154 | if (field_size <= 0) |
2155 | { | |
2156 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2157 | ERR_R_ECDH_LIB); | |
2158 | goto err; | |
2159 | } | |
d56349a2 | 2160 | i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL); |
ea262260 BM |
2161 | if (i <= 0) |
2162 | { | |
2163 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2164 | ERR_R_ECDH_LIB); | |
2165 | goto err; | |
2166 | } | |
2167 | ||
2168 | EVP_PKEY_free(clnt_pub_pkey); | |
2169 | EC_POINT_free(clnt_ecpoint); | |
2170 | if (srvr_ecdh != NULL) | |
ea262260 | 2171 | EC_KEY_free(srvr_ecdh); |
ea262260 BM |
2172 | BN_CTX_free(bn_ctx); |
2173 | ||
2174 | /* Compute the master secret */ | |
2175 | s->session->master_key_length = s->method->ssl3_enc-> \ | |
2176 | generate_master_secret(s, s->session->master_key, p, i); | |
2177 | ||
4579924b | 2178 | OPENSSL_cleanse(p, i); |
ea262260 BM |
2179 | return (ret); |
2180 | } | |
2181 | else | |
2182 | #endif | |
d02b48c6 | 2183 | { |
58964a49 | 2184 | al=SSL_AD_HANDSHAKE_FAILURE; |
2a1ef754 RL |
2185 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2186 | SSL_R_UNKNOWN_CIPHER_TYPE); | |
d02b48c6 RE |
2187 | goto f_err; |
2188 | } | |
2189 | ||
2190 | return(1); | |
2191 | f_err: | |
2192 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
ea262260 | 2193 | #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH) |
d02b48c6 | 2194 | err: |
ea262260 | 2195 | #endif |
d020e701 | 2196 | #ifndef OPENSSL_NO_ECDH |
ea262260 BM |
2197 | EVP_PKEY_free(clnt_pub_pkey); |
2198 | EC_POINT_free(clnt_ecpoint); | |
2199 | if (srvr_ecdh != NULL) | |
ea262260 | 2200 | EC_KEY_free(srvr_ecdh); |
ea262260 | 2201 | BN_CTX_free(bn_ctx); |
58964a49 | 2202 | #endif |
d02b48c6 RE |
2203 | return(-1); |
2204 | } | |
2205 | ||
36d16f8e | 2206 | int ssl3_get_cert_verify(SSL *s) |
d02b48c6 RE |
2207 | { |
2208 | EVP_PKEY *pkey=NULL; | |
2209 | unsigned char *p; | |
2210 | int al,ok,ret=0; | |
2211 | long n; | |
2212 | int type=0,i,j; | |
2213 | X509 *peer; | |
2214 | ||
36d16f8e | 2215 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
2216 | SSL3_ST_SR_CERT_VRFY_A, |
2217 | SSL3_ST_SR_CERT_VRFY_B, | |
2218 | -1, | |
00a357ab | 2219 | 514, /* 514? */ |
d02b48c6 RE |
2220 | &ok); |
2221 | ||
2222 | if (!ok) return((int)n); | |
2223 | ||
2224 | if (s->session->peer != NULL) | |
2225 | { | |
2226 | peer=s->session->peer; | |
2227 | pkey=X509_get_pubkey(peer); | |
2228 | type=X509_certificate_type(peer,pkey); | |
2229 | } | |
2230 | else | |
2231 | { | |
2232 | peer=NULL; | |
2233 | pkey=NULL; | |
2234 | } | |
2235 | ||
2236 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY) | |
2237 | { | |
2238 | s->s3->tmp.reuse_message=1; | |
2239 | if ((peer != NULL) && (type | EVP_PKT_SIGN)) | |
2240 | { | |
58964a49 | 2241 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 | 2242 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE); |
d02b48c6 RE |
2243 | goto f_err; |
2244 | } | |
2245 | ret=1; | |
2246 | goto end; | |
2247 | } | |
2248 | ||
2249 | if (peer == NULL) | |
2250 | { | |
2251 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED); | |
58964a49 | 2252 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
2253 | goto f_err; |
2254 | } | |
2255 | ||
2256 | if (!(type & EVP_PKT_SIGN)) | |
2257 | { | |
2258 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE); | |
58964a49 | 2259 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
2260 | goto f_err; |
2261 | } | |
2262 | ||
2263 | if (s->s3->change_cipher_spec) | |
2264 | { | |
2265 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY); | |
58964a49 | 2266 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
2267 | goto f_err; |
2268 | } | |
2269 | ||
2270 | /* we now have a signature that we need to verify */ | |
48948d53 | 2271 | p=(unsigned char *)s->init_msg; |
d02b48c6 RE |
2272 | n2s(p,i); |
2273 | n-=2; | |
2274 | if (i > n) | |
2275 | { | |
2276 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH); | |
58964a49 | 2277 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2278 | goto f_err; |
2279 | } | |
2280 | ||
2281 | j=EVP_PKEY_size(pkey); | |
2282 | if ((i > j) || (n > j) || (n <= 0)) | |
2283 | { | |
2284 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE); | |
58964a49 | 2285 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2286 | goto f_err; |
2287 | } | |
2288 | ||
bc36ee62 | 2289 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
2290 | if (pkey->type == EVP_PKEY_RSA) |
2291 | { | |
f2d9a32c | 2292 | i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md, |
1c80019a DSH |
2293 | MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i, |
2294 | pkey->pkey.rsa); | |
d02b48c6 RE |
2295 | if (i < 0) |
2296 | { | |
58964a49 | 2297 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
2298 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT); |
2299 | goto f_err; | |
2300 | } | |
1c80019a | 2301 | if (i == 0) |
d02b48c6 | 2302 | { |
58964a49 | 2303 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
2304 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE); |
2305 | goto f_err; | |
2306 | } | |
2307 | } | |
2308 | else | |
2309 | #endif | |
bc36ee62 | 2310 | #ifndef OPENSSL_NO_DSA |
d02b48c6 RE |
2311 | if (pkey->type == EVP_PKEY_DSA) |
2312 | { | |
58964a49 | 2313 | j=DSA_verify(pkey->save_type, |
f2d9a32c | 2314 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), |
d02b48c6 RE |
2315 | SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa); |
2316 | if (j <= 0) | |
2317 | { | |
2318 | /* bad signature */ | |
58964a49 | 2319 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
2320 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE); |
2321 | goto f_err; | |
2322 | } | |
2323 | } | |
2324 | else | |
ea262260 BM |
2325 | #endif |
2326 | #ifndef OPENSSL_NO_ECDSA | |
5488bb61 | 2327 | if (pkey->type == EVP_PKEY_EC) |
ea262260 BM |
2328 | { |
2329 | j=ECDSA_verify(pkey->save_type, | |
2330 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), | |
9dd84053 | 2331 | SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec); |
ea262260 BM |
2332 | if (j <= 0) |
2333 | { | |
2334 | /* bad signature */ | |
2335 | al=SSL_AD_DECRYPT_ERROR; | |
2336 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, | |
2337 | SSL_R_BAD_ECDSA_SIGNATURE); | |
2338 | goto f_err; | |
2339 | } | |
2340 | } | |
2341 | else | |
d02b48c6 RE |
2342 | #endif |
2343 | { | |
5277d7cb | 2344 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR); |
58964a49 | 2345 | al=SSL_AD_UNSUPPORTED_CERTIFICATE; |
d02b48c6 RE |
2346 | goto f_err; |
2347 | } | |
2348 | ||
2349 | ||
2350 | ret=1; | |
2351 | if (0) | |
2352 | { | |
2353 | f_err: | |
2354 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
2355 | } | |
2356 | end: | |
a8236c8c | 2357 | EVP_PKEY_free(pkey); |
d02b48c6 RE |
2358 | return(ret); |
2359 | } | |
2360 | ||
36d16f8e | 2361 | int ssl3_get_client_certificate(SSL *s) |
d02b48c6 RE |
2362 | { |
2363 | int i,ok,al,ret= -1; | |
2364 | X509 *x=NULL; | |
2365 | unsigned long l,nc,llen,n; | |
875a644a RL |
2366 | const unsigned char *p,*q; |
2367 | unsigned char *d; | |
f73e07cf | 2368 | STACK_OF(X509) *sk=NULL; |
d02b48c6 | 2369 | |
36d16f8e | 2370 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
2371 | SSL3_ST_SR_CERT_A, |
2372 | SSL3_ST_SR_CERT_B, | |
2373 | -1, | |
c0f5dd07 | 2374 | s->max_cert_list, |
d02b48c6 RE |
2375 | &ok); |
2376 | ||
2377 | if (!ok) return((int)n); | |
2378 | ||
2379 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE) | |
2380 | { | |
2381 | if ( (s->verify_mode & SSL_VERIFY_PEER) && | |
2382 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
2383 | { | |
2384 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
58964a49 RE |
2385 | al=SSL_AD_HANDSHAKE_FAILURE; |
2386 | goto f_err; | |
2387 | } | |
47134b78 | 2388 | /* If tls asked for a client cert, the client must return a 0 list */ |
58964a49 RE |
2389 | if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request) |
2390 | { | |
2391 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST); | |
2392 | al=SSL_AD_UNEXPECTED_MESSAGE; | |
d02b48c6 RE |
2393 | goto f_err; |
2394 | } | |
2395 | s->s3->tmp.reuse_message=1; | |
2396 | return(1); | |
2397 | } | |
2398 | ||
2399 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) | |
2400 | { | |
58964a49 | 2401 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
2402 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE); |
2403 | goto f_err; | |
2404 | } | |
875a644a | 2405 | p=d=(unsigned char *)s->init_msg; |
d02b48c6 | 2406 | |
f73e07cf | 2407 | if ((sk=sk_X509_new_null()) == NULL) |
d02b48c6 RE |
2408 | { |
2409 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
2410 | goto err; | |
2411 | } | |
2412 | ||
2413 | n2l3(p,llen); | |
2414 | if (llen+3 != n) | |
2415 | { | |
58964a49 | 2416 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2417 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH); |
2418 | goto f_err; | |
2419 | } | |
2420 | for (nc=0; nc<llen; ) | |
2421 | { | |
2422 | n2l3(p,l); | |
2423 | if ((l+nc+3) > llen) | |
2424 | { | |
58964a49 | 2425 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2426 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
2427 | goto f_err; | |
2428 | } | |
2429 | ||
2430 | q=p; | |
2431 | x=d2i_X509(NULL,&p,l); | |
2432 | if (x == NULL) | |
2433 | { | |
2434 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB); | |
2435 | goto err; | |
2436 | } | |
2437 | if (p != (q+l)) | |
2438 | { | |
58964a49 | 2439 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2440 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
2441 | goto f_err; | |
2442 | } | |
f73e07cf | 2443 | if (!sk_X509_push(sk,x)) |
d02b48c6 RE |
2444 | { |
2445 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
2446 | goto err; | |
2447 | } | |
2448 | x=NULL; | |
2449 | nc+=l+3; | |
2450 | } | |
2451 | ||
f73e07cf | 2452 | if (sk_X509_num(sk) <= 0) |
d02b48c6 | 2453 | { |
58964a49 RE |
2454 | /* TLS does not mind 0 certs returned */ |
2455 | if (s->version == SSL3_VERSION) | |
2456 | { | |
2457 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2458 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED); | |
2459 | goto f_err; | |
2460 | } | |
2461 | /* Fail for TLS only if we required a certificate */ | |
2462 | else if ((s->verify_mode & SSL_VERIFY_PEER) && | |
2463 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
2464 | { | |
2465 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
2466 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2467 | goto f_err; | |
2468 | } | |
d02b48c6 | 2469 | } |
58964a49 | 2470 | else |
d02b48c6 | 2471 | { |
58964a49 RE |
2472 | i=ssl_verify_cert_chain(s,sk); |
2473 | if (!i) | |
2474 | { | |
2475 | al=ssl_verify_alarm_type(s->verify_result); | |
2476 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED); | |
2477 | goto f_err; | |
2478 | } | |
d02b48c6 RE |
2479 | } |
2480 | ||
b56bce4f | 2481 | if (s->session->peer != NULL) /* This should not be needed */ |
d02b48c6 | 2482 | X509_free(s->session->peer); |
f73e07cf | 2483 | s->session->peer=sk_X509_shift(sk); |
b1fe6ca1 | 2484 | s->session->verify_result = s->verify_result; |
8051996a | 2485 | |
b56bce4f BM |
2486 | /* With the current implementation, sess_cert will always be NULL |
2487 | * when we arrive here. */ | |
2488 | if (s->session->sess_cert == NULL) | |
2489 | { | |
2490 | s->session->sess_cert = ssl_sess_cert_new(); | |
2491 | if (s->session->sess_cert == NULL) | |
2492 | { | |
2493 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE); | |
2494 | goto err; | |
2495 | } | |
2496 | } | |
2497 | if (s->session->sess_cert->cert_chain != NULL) | |
2498 | sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free); | |
9d5cceac | 2499 | s->session->sess_cert->cert_chain=sk; |
98e04f9e BM |
2500 | /* Inconsistency alert: cert_chain does *not* include the |
2501 | * peer's own certificate, while we do include it in s3_clnt.c */ | |
8051996a | 2502 | |
b4cadc6e | 2503 | sk=NULL; |
d02b48c6 RE |
2504 | |
2505 | ret=1; | |
2506 | if (0) | |
2507 | { | |
2508 | f_err: | |
2509 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
2510 | } | |
2511 | err: | |
2512 | if (x != NULL) X509_free(x); | |
f73e07cf | 2513 | if (sk != NULL) sk_X509_pop_free(sk,X509_free); |
d02b48c6 RE |
2514 | return(ret); |
2515 | } | |
2516 | ||
6b691a5c | 2517 | int ssl3_send_server_certificate(SSL *s) |
d02b48c6 RE |
2518 | { |
2519 | unsigned long l; | |
2520 | X509 *x; | |
2521 | ||
2522 | if (s->state == SSL3_ST_SW_CERT_A) | |
2523 | { | |
2524 | x=ssl_get_server_send_cert(s); | |
f9b3bff6 RL |
2525 | if (x == NULL && |
2526 | /* VRS: allow null cert if auth == KRB5 */ | |
2527 | (s->s3->tmp.new_cipher->algorithms | |
2528 | & (SSL_MKEY_MASK|SSL_AUTH_MASK)) | |
2529 | != (SSL_aKRB5|SSL_kKRB5)) | |
d02b48c6 | 2530 | { |
5277d7cb | 2531 | SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR); |
d02b48c6 RE |
2532 | return(0); |
2533 | } | |
2534 | ||
2535 | l=ssl3_output_cert_chain(s,x); | |
2536 | s->state=SSL3_ST_SW_CERT_B; | |
2537 | s->init_num=(int)l; | |
2538 | s->init_off=0; | |
2539 | } | |
2540 | ||
2541 | /* SSL3_ST_SW_CERT_B */ | |
2542 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
2543 | } | |
ea262260 BM |
2544 | |
2545 | ||
2546 | #ifndef OPENSSL_NO_ECDH | |
2547 | /* This is the complement of curve_id2nid in s3_clnt.c. */ | |
2548 | static int nid2curve_id(int nid) | |
2549 | { | |
968766ca BM |
2550 | /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001) |
2551 | * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */ | |
ea262260 BM |
2552 | switch (nid) { |
2553 | case NID_sect163k1: /* sect163k1 (1) */ | |
2554 | return 1; | |
2555 | case NID_sect163r1: /* sect163r1 (2) */ | |
2556 | return 2; | |
2557 | case NID_sect163r2: /* sect163r2 (3) */ | |
2558 | return 3; | |
2559 | case NID_sect193r1: /* sect193r1 (4) */ | |
2560 | return 4; | |
2561 | case NID_sect193r2: /* sect193r2 (5) */ | |
2562 | return 5; | |
2563 | case NID_sect233k1: /* sect233k1 (6) */ | |
2564 | return 6; | |
2565 | case NID_sect233r1: /* sect233r1 (7) */ | |
2566 | return 7; | |
2567 | case NID_sect239k1: /* sect239k1 (8) */ | |
2568 | return 8; | |
2569 | case NID_sect283k1: /* sect283k1 (9) */ | |
2570 | return 9; | |
2571 | case NID_sect283r1: /* sect283r1 (10) */ | |
2572 | return 10; | |
2573 | case NID_sect409k1: /* sect409k1 (11) */ | |
2574 | return 11; | |
2575 | case NID_sect409r1: /* sect409r1 (12) */ | |
2576 | return 12; | |
2577 | case NID_sect571k1: /* sect571k1 (13) */ | |
2578 | return 13; | |
2579 | case NID_sect571r1: /* sect571r1 (14) */ | |
2580 | return 14; | |
2581 | case NID_secp160k1: /* secp160k1 (15) */ | |
2582 | return 15; | |
2583 | case NID_secp160r1: /* secp160r1 (16) */ | |
2584 | return 16; | |
2585 | case NID_secp160r2: /* secp160r2 (17) */ | |
2586 | return 17; | |
2587 | case NID_secp192k1: /* secp192k1 (18) */ | |
2588 | return 18; | |
2589 | case NID_X9_62_prime192v1: /* secp192r1 (19) */ | |
2590 | return 19; | |
2591 | case NID_secp224k1: /* secp224k1 (20) */ | |
2592 | return 20; | |
2593 | case NID_secp224r1: /* secp224r1 (21) */ | |
2594 | return 21; | |
2595 | case NID_secp256k1: /* secp256k1 (22) */ | |
2596 | return 22; | |
2597 | case NID_X9_62_prime256v1: /* secp256r1 (23) */ | |
2598 | return 23; | |
2599 | case NID_secp384r1: /* secp384r1 (24) */ | |
2600 | return 24; | |
2601 | case NID_secp521r1: /* secp521r1 (25) */ | |
2602 | return 25; | |
2603 | default: | |
2604 | return 0; | |
2605 | } | |
2606 | } | |
2607 | #endif |