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8ba708e5 | 1 | /* ssl/statem/statem_lib.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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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 | */ | |
3813046d | 58 | /* ==================================================================== |
82b0bf0b | 59 | * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. |
3813046d 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 | |
0f113f3e | 66 | * notice, this list of conditions and the following disclaimer. |
3813046d BM |
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. | |
0f113f3e | 113 | * ECC cipher suite support in OpenSSL originally developed by |
ea262260 BM |
114 | * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. |
115 | */ | |
d02b48c6 | 116 | |
48948d53 | 117 | #include <limits.h> |
f2d9a32c | 118 | #include <string.h> |
d02b48c6 | 119 | #include <stdio.h> |
8ba708e5 | 120 | #include "../ssl_locl.h" |
61ae935a | 121 | #include "statem_locl.h" |
ec577822 BM |
122 | #include <openssl/buffer.h> |
123 | #include <openssl/rand.h> | |
124 | #include <openssl/objects.h> | |
125 | #include <openssl/evp.h> | |
126 | #include <openssl/x509.h> | |
d02b48c6 | 127 | |
0f113f3e MC |
128 | /* |
129 | * send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or | |
130 | * SSL3_RT_CHANGE_CIPHER_SPEC) | |
131 | */ | |
e7ecc7d4 | 132 | int ssl3_do_write(SSL *s, int type) |
0f113f3e MC |
133 | { |
134 | int ret; | |
135 | ||
136 | ret = ssl3_write_bytes(s, type, &s->init_buf->data[s->init_off], | |
137 | s->init_num); | |
138 | if (ret < 0) | |
139 | return (-1); | |
140 | if (type == SSL3_RT_HANDSHAKE) | |
141 | /* | |
142 | * should not be done for 'Hello Request's, but in that case we'll | |
143 | * ignore the result anyway | |
144 | */ | |
145 | ssl3_finish_mac(s, (unsigned char *)&s->init_buf->data[s->init_off], | |
146 | ret); | |
147 | ||
148 | if (ret == s->init_num) { | |
149 | if (s->msg_callback) | |
150 | s->msg_callback(1, s->version, type, s->init_buf->data, | |
151 | (size_t)(s->init_off + s->init_num), s, | |
152 | s->msg_callback_arg); | |
153 | return (1); | |
154 | } | |
155 | s->init_off += ret; | |
156 | s->init_num -= ret; | |
157 | return (0); | |
158 | } | |
e7ecc7d4 | 159 | |
b9908bf9 | 160 | int tls_construct_finished(SSL *s, const char *sender, int slen) |
0f113f3e MC |
161 | { |
162 | unsigned char *p; | |
163 | int i; | |
164 | unsigned long l; | |
165 | ||
b9908bf9 | 166 | p = ssl_handshake_start(s); |
0f113f3e | 167 | |
b9908bf9 MC |
168 | i = s->method->ssl3_enc->final_finish_mac(s, |
169 | sender, slen, | |
170 | s->s3->tmp.finish_md); | |
171 | if (i <= 0) | |
172 | return 0; | |
173 | s->s3->tmp.finish_md_len = i; | |
174 | memcpy(p, s->s3->tmp.finish_md, i); | |
175 | l = i; | |
0f113f3e | 176 | |
b9908bf9 MC |
177 | /* |
178 | * Copy the finished so we can use it for renegotiation checks | |
179 | */ | |
23a635c0 | 180 | if (!s->server) { |
b9908bf9 MC |
181 | OPENSSL_assert(i <= EVP_MAX_MD_SIZE); |
182 | memcpy(s->s3->previous_client_finished, s->s3->tmp.finish_md, i); | |
183 | s->s3->previous_client_finished_len = i; | |
184 | } else { | |
185 | OPENSSL_assert(i <= EVP_MAX_MD_SIZE); | |
186 | memcpy(s->s3->previous_server_finished, s->s3->tmp.finish_md, i); | |
187 | s->s3->previous_server_finished_len = i; | |
188 | } | |
0f113f3e | 189 | |
b9908bf9 MC |
190 | if (!ssl_set_handshake_header(s, SSL3_MT_FINISHED, l)) { |
191 | SSLerr(SSL_F_TLS_CONSTRUCT_FINISHED, ERR_R_INTERNAL_ERROR); | |
192 | return 0; | |
0f113f3e MC |
193 | } |
194 | ||
b9908bf9 | 195 | return 1; |
0f113f3e | 196 | } |
d02b48c6 | 197 | |
bf48836c | 198 | #ifndef OPENSSL_NO_NEXTPROTONEG |
0f113f3e MC |
199 | /* |
200 | * ssl3_take_mac calculates the Finished MAC for the handshakes messages seen | |
201 | * to far. | |
202 | */ | |
ee2ffc27 | 203 | static void ssl3_take_mac(SSL *s) |
0f113f3e MC |
204 | { |
205 | const char *sender; | |
206 | int slen; | |
207 | /* | |
208 | * If no new cipher setup return immediately: other functions will set | |
209 | * the appropriate error. | |
210 | */ | |
211 | if (s->s3->tmp.new_cipher == NULL) | |
212 | return; | |
49ae7423 | 213 | if (!s->server) { |
0f113f3e MC |
214 | sender = s->method->ssl3_enc->server_finished_label; |
215 | slen = s->method->ssl3_enc->server_finished_label_len; | |
216 | } else { | |
217 | sender = s->method->ssl3_enc->client_finished_label; | |
218 | slen = s->method->ssl3_enc->client_finished_label_len; | |
219 | } | |
220 | ||
221 | s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s, | |
222 | sender, | |
223 | slen, | |
224 | s->s3->tmp.peer_finish_md); | |
225 | } | |
ee2ffc27 BL |
226 | #endif |
227 | ||
73999b62 | 228 | enum MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, PACKET *pkt) |
b9908bf9 MC |
229 | { |
230 | int al; | |
73999b62 MC |
231 | long remain; |
232 | ||
233 | remain = PACKET_remaining(pkt); | |
657da85e MC |
234 | /* |
235 | * 'Change Cipher Spec' is just a single byte, which should already have | |
c69f2adf MC |
236 | * been consumed by ssl_get_message() so there should be no bytes left, |
237 | * unless we're using DTLS1_BAD_VER, which has an extra 2 bytes | |
657da85e | 238 | */ |
c69f2adf | 239 | if (SSL_IS_DTLS(s)) { |
73999b62 MC |
240 | if ((s->version == DTLS1_BAD_VER |
241 | && remain != DTLS1_CCS_HEADER_LENGTH + 1) | |
c69f2adf | 242 | || (s->version != DTLS1_BAD_VER |
73999b62 | 243 | && remain != DTLS1_CCS_HEADER_LENGTH - 1)) { |
c69f2adf | 244 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 MC |
245 | SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, |
246 | SSL_R_BAD_CHANGE_CIPHER_SPEC); | |
c69f2adf MC |
247 | goto f_err; |
248 | } | |
249 | } else { | |
73999b62 | 250 | if (remain != 0) { |
c69f2adf | 251 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 MC |
252 | SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, |
253 | SSL_R_BAD_CHANGE_CIPHER_SPEC); | |
c69f2adf MC |
254 | goto f_err; |
255 | } | |
657da85e MC |
256 | } |
257 | ||
258 | /* Check we have a cipher to change to */ | |
259 | if (s->s3->tmp.new_cipher == NULL) { | |
260 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 261 | SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, SSL_R_CCS_RECEIVED_EARLY); |
657da85e MC |
262 | goto f_err; |
263 | } | |
264 | ||
265 | s->s3->change_cipher_spec = 1; | |
266 | if (!ssl3_do_change_cipher_spec(s)) { | |
267 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 268 | SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, ERR_R_INTERNAL_ERROR); |
657da85e MC |
269 | goto f_err; |
270 | } | |
271 | ||
c69f2adf MC |
272 | if (SSL_IS_DTLS(s)) { |
273 | dtls1_reset_seq_numbers(s, SSL3_CC_READ); | |
274 | ||
275 | if (s->version == DTLS1_BAD_VER) | |
276 | s->d1->handshake_read_seq++; | |
277 | ||
278 | #ifndef OPENSSL_NO_SCTP | |
279 | /* | |
280 | * Remember that a CCS has been received, so that an old key of | |
281 | * SCTP-Auth can be deleted when a CCS is sent. Will be ignored if no | |
282 | * SCTP is used | |
283 | */ | |
284 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD, 1, NULL); | |
285 | #endif | |
286 | } | |
287 | ||
b9908bf9 | 288 | return MSG_PROCESS_CONTINUE_READING; |
657da85e MC |
289 | f_err: |
290 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
b9908bf9 MC |
291 | statem_set_error(s); |
292 | return MSG_PROCESS_ERROR; | |
657da85e MC |
293 | } |
294 | ||
73999b62 | 295 | enum MSG_PROCESS_RETURN tls_process_finished(SSL *s, PACKET *pkt) |
b9908bf9 MC |
296 | { |
297 | int al, i; | |
b9908bf9 | 298 | |
0f113f3e MC |
299 | /* If this occurs, we have missed a message */ |
300 | if (!s->s3->change_cipher_spec) { | |
301 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 302 | SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_GOT_A_FIN_BEFORE_A_CCS); |
0f113f3e MC |
303 | goto f_err; |
304 | } | |
305 | s->s3->change_cipher_spec = 0; | |
306 | ||
0f113f3e MC |
307 | i = s->s3->tmp.peer_finish_md_len; |
308 | ||
73999b62 | 309 | if (i < 0 || (unsigned long)i != PACKET_remaining(pkt)) { |
0f113f3e | 310 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 311 | SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_BAD_DIGEST_LENGTH); |
0f113f3e MC |
312 | goto f_err; |
313 | } | |
314 | ||
73999b62 | 315 | if (CRYPTO_memcmp(PACKET_data(pkt), s->s3->tmp.peer_finish_md, i) != 0) { |
0f113f3e | 316 | al = SSL_AD_DECRYPT_ERROR; |
b9908bf9 | 317 | SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_DIGEST_CHECK_FAILED); |
0f113f3e MC |
318 | goto f_err; |
319 | } | |
320 | ||
321 | /* | |
322 | * Copy the finished so we can use it for renegotiation checks | |
323 | */ | |
23a635c0 | 324 | if (s->server) { |
0f113f3e MC |
325 | OPENSSL_assert(i <= EVP_MAX_MD_SIZE); |
326 | memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md, i); | |
327 | s->s3->previous_client_finished_len = i; | |
328 | } else { | |
329 | OPENSSL_assert(i <= EVP_MAX_MD_SIZE); | |
330 | memcpy(s->s3->previous_server_finished, s->s3->tmp.peer_finish_md, i); | |
331 | s->s3->previous_server_finished_len = i; | |
332 | } | |
333 | ||
b9908bf9 | 334 | return MSG_PROCESS_CONTINUE_PROCESSING; |
0f113f3e MC |
335 | f_err: |
336 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
b9908bf9 MC |
337 | statem_set_error(s); |
338 | return MSG_PROCESS_ERROR; | |
0f113f3e | 339 | } |
d02b48c6 | 340 | |
b9908bf9 MC |
341 | int tls_construct_change_cipher_spec(SSL *s) |
342 | { | |
343 | unsigned char *p; | |
344 | ||
345 | p = (unsigned char *)s->init_buf->data; | |
346 | *p = SSL3_MT_CCS; | |
347 | s->init_num = 1; | |
348 | s->init_off = 0; | |
349 | ||
350 | return 1; | |
351 | } | |
352 | ||
c526ed41 | 353 | unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk) |
0f113f3e MC |
354 | { |
355 | unsigned char *p; | |
356 | unsigned long l = 3 + SSL_HM_HEADER_LENGTH(s); | |
357 | ||
358 | if (!ssl_add_cert_chain(s, cpk, &l)) | |
359 | return 0; | |
360 | ||
361 | l -= 3 + SSL_HM_HEADER_LENGTH(s); | |
362 | p = ssl_handshake_start(s); | |
363 | l2n3(l, p); | |
364 | l += 3; | |
77d514c5 | 365 | |
61986d32 | 366 | if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE, l)) { |
77d514c5 MC |
367 | SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_INTERNAL_ERROR); |
368 | return 0; | |
369 | } | |
0f113f3e MC |
370 | return l + SSL_HM_HEADER_LENGTH(s); |
371 | } | |
372 | ||
8723588e MC |
373 | enum WORK_STATE tls_finish_handshake(SSL *s, enum WORK_STATE wst) |
374 | { | |
375 | void (*cb) (const SSL *ssl, int type, int val) = NULL; | |
376 | ||
377 | #ifndef OPENSSL_NO_SCTP | |
378 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))) { | |
379 | enum WORK_STATE ret; | |
380 | ret = dtls_wait_for_dry(s); | |
381 | if (ret != WORK_FINISHED_CONTINUE) | |
382 | return ret; | |
383 | } | |
384 | #endif | |
385 | ||
386 | /* clean a few things up */ | |
387 | ssl3_cleanup_key_block(s); | |
473483d4 MC |
388 | |
389 | if (!SSL_IS_DTLS(s)) { | |
390 | /* | |
391 | * We don't do this in DTLS because we may still need the init_buf | |
392 | * in case there are any unexpected retransmits | |
393 | */ | |
394 | BUF_MEM_free(s->init_buf); | |
395 | s->init_buf = NULL; | |
396 | } | |
8723588e MC |
397 | |
398 | ssl_free_wbio_buffer(s); | |
399 | ||
400 | s->init_num = 0; | |
401 | ||
402 | if (!s->server || s->renegotiate == 2) { | |
403 | /* skipped if we just sent a HelloRequest */ | |
404 | s->renegotiate = 0; | |
405 | s->new_session = 0; | |
406 | ||
407 | if (s->server) { | |
408 | s->renegotiate = 0; | |
409 | s->new_session = 0; | |
410 | ||
411 | ssl_update_cache(s, SSL_SESS_CACHE_SERVER); | |
412 | ||
413 | s->ctx->stats.sess_accept_good++; | |
8ba708e5 | 414 | s->handshake_func = statem_accept; |
8723588e MC |
415 | } else { |
416 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); | |
417 | if (s->hit) | |
418 | s->ctx->stats.sess_hit++; | |
419 | ||
8ba708e5 | 420 | s->handshake_func = statem_connect; |
8723588e MC |
421 | s->ctx->stats.sess_connect_good++; |
422 | } | |
423 | ||
424 | if (s->info_callback != NULL) | |
425 | cb = s->info_callback; | |
426 | else if (s->ctx->info_callback != NULL) | |
427 | cb = s->ctx->info_callback; | |
428 | ||
429 | if (cb != NULL) | |
430 | cb(s, SSL_CB_HANDSHAKE_DONE, 1); | |
431 | ||
432 | if (SSL_IS_DTLS(s)) { | |
433 | /* done with handshaking */ | |
434 | s->d1->handshake_read_seq = 0; | |
435 | s->d1->handshake_write_seq = 0; | |
436 | s->d1->next_handshake_write_seq = 0; | |
437 | } | |
438 | } | |
439 | ||
440 | return WORK_FINISHED_STOP; | |
441 | } | |
442 | ||
9ab930b2 MC |
443 | int tls_get_message_header(SSL *s, int *mt) |
444 | { | |
445 | /* s->init_num < SSL3_HM_HEADER_LENGTH */ | |
446 | int skip_message, i, recvd_type, al; | |
447 | unsigned char *p; | |
448 | unsigned long l; | |
449 | ||
450 | p = (unsigned char *)s->init_buf->data; | |
451 | ||
452 | do { | |
453 | while (s->init_num < SSL3_HM_HEADER_LENGTH) { | |
454 | i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &recvd_type, | |
455 | &p[s->init_num], SSL3_HM_HEADER_LENGTH - s->init_num, 0); | |
456 | if (i <= 0) { | |
457 | s->rwstate = SSL_READING; | |
458 | return 0; | |
32ec4153 | 459 | } |
9ab930b2 MC |
460 | if (recvd_type == SSL3_RT_CHANGE_CIPHER_SPEC) { |
461 | s->s3->tmp.message_type = *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
462 | s->init_num = i - 1; | |
463 | s->s3->tmp.message_size = i; | |
464 | return 1; | |
465 | } else if (recvd_type != SSL3_RT_HANDSHAKE) { | |
466 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
467 | SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, SSL_R_CCS_RECEIVED_EARLY); | |
32ec4153 MC |
468 | goto f_err; |
469 | } | |
9ab930b2 MC |
470 | s->init_num += i; |
471 | } | |
472 | ||
473 | skip_message = 0; | |
474 | if (!s->server) | |
475 | if (p[0] == SSL3_MT_HELLO_REQUEST) | |
476 | /* | |
477 | * The server may always send 'Hello Request' messages -- | |
478 | * we are doing a handshake anyway now, so ignore them if | |
479 | * their format is correct. Does not count for 'Finished' | |
480 | * MAC. | |
481 | */ | |
482 | if (p[1] == 0 && p[2] == 0 && p[3] == 0) { | |
483 | s->init_num = 0; | |
484 | skip_message = 1; | |
485 | ||
486 | if (s->msg_callback) | |
487 | s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, | |
488 | p, SSL3_HM_HEADER_LENGTH, s, | |
489 | s->msg_callback_arg); | |
490 | } | |
491 | } while (skip_message); | |
492 | /* s->init_num == SSL3_HM_HEADER_LENGTH */ | |
493 | ||
494 | *mt = *p; | |
495 | s->s3->tmp.message_type = *(p++); | |
32ec4153 | 496 | |
9ab930b2 MC |
497 | if(RECORD_LAYER_is_sslv2_record(&s->rlayer)) { |
498 | /* | |
499 | * Only happens with SSLv3+ in an SSLv2 backward compatible | |
500 | * ClientHello | |
501 | */ | |
502 | /* | |
503 | * Total message size is the remaining record bytes to read | |
504 | * plus the SSL3_HM_HEADER_LENGTH bytes that we already read | |
505 | */ | |
506 | l = RECORD_LAYER_get_rrec_length(&s->rlayer) | |
507 | + SSL3_HM_HEADER_LENGTH; | |
508 | if (l && !BUF_MEM_grow_clean(s->init_buf, (int)l)) { | |
509 | SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, ERR_R_BUF_LIB); | |
510 | goto err; | |
511 | } | |
512 | s->s3->tmp.message_size = l; | |
513 | ||
514 | s->init_msg = s->init_buf->data; | |
515 | s->init_num = SSL3_HM_HEADER_LENGTH; | |
516 | } else { | |
517 | n2l3(p, l); | |
518 | /* BUF_MEM_grow takes an 'int' parameter */ | |
519 | if (l > (INT_MAX - SSL3_HM_HEADER_LENGTH)) { | |
520 | al = SSL_AD_ILLEGAL_PARAMETER; | |
521 | SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, SSL_R_EXCESSIVE_MESSAGE_SIZE); | |
522 | goto f_err; | |
32ec4153 | 523 | } |
9ab930b2 MC |
524 | if (l && !BUF_MEM_grow_clean(s->init_buf, |
525 | (int)l + SSL3_HM_HEADER_LENGTH)) { | |
526 | SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, ERR_R_BUF_LIB); | |
527 | goto err; | |
528 | } | |
529 | s->s3->tmp.message_size = l; | |
530 | ||
531 | s->init_msg = s->init_buf->data + SSL3_HM_HEADER_LENGTH; | |
532 | s->init_num = 0; | |
533 | } | |
534 | ||
535 | return 1; | |
536 | f_err: | |
537 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
538 | err: | |
539 | return 0; | |
540 | } | |
541 | ||
542 | int tls_get_message_body(SSL *s, unsigned long *len) | |
543 | { | |
544 | long n; | |
545 | unsigned char *p; | |
546 | int i; | |
547 | ||
548 | if (s->s3->tmp.message_type == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
549 | /* We've already read everything in */ | |
550 | *len = (unsigned long)s->init_num; | |
551 | return 1; | |
0f113f3e MC |
552 | } |
553 | ||
0f113f3e MC |
554 | p = s->init_msg; |
555 | n = s->s3->tmp.message_size - s->init_num; | |
556 | while (n > 0) { | |
657da85e MC |
557 | i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL, |
558 | &p[s->init_num], n, 0); | |
0f113f3e MC |
559 | if (i <= 0) { |
560 | s->rwstate = SSL_READING; | |
9ab930b2 MC |
561 | *len = 0; |
562 | return 0; | |
0f113f3e MC |
563 | } |
564 | s->init_num += i; | |
565 | n -= i; | |
566 | } | |
ee2ffc27 | 567 | |
bf48836c | 568 | #ifndef OPENSSL_NO_NEXTPROTONEG |
0f113f3e MC |
569 | /* |
570 | * If receiving Finished, record MAC of prior handshake messages for | |
571 | * Finished verification. | |
572 | */ | |
573 | if (*s->init_buf->data == SSL3_MT_FINISHED) | |
574 | ssl3_take_mac(s); | |
ee2ffc27 BL |
575 | #endif |
576 | ||
0f113f3e | 577 | /* Feed this message into MAC computation. */ |
32ec4153 MC |
578 | if(RECORD_LAYER_is_sslv2_record(&s->rlayer)) { |
579 | ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num); | |
32ec4153 MC |
580 | if (s->msg_callback) |
581 | s->msg_callback(0, SSL2_VERSION, 0, s->init_buf->data, | |
582 | (size_t)s->init_num, s, s->msg_callback_arg); | |
583 | } else { | |
584 | ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
585 | s->init_num + SSL3_HM_HEADER_LENGTH); | |
586 | if (s->msg_callback) | |
587 | s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, | |
588 | (size_t)s->init_num + SSL3_HM_HEADER_LENGTH, s, | |
589 | s->msg_callback_arg); | |
590 | } | |
591 | ||
9ab930b2 MC |
592 | /* |
593 | * init_num should never be negative...should probably be declared | |
594 | * unsigned | |
595 | */ | |
596 | if (s->init_num < 0) { | |
597 | SSLerr(SSL_F_TLS_GET_MESSAGE_BODY, ERR_R_INTERNAL_ERROR); | |
598 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
599 | *len = 0; | |
600 | return 0; | |
601 | } | |
602 | *len = (unsigned long)s->init_num; | |
603 | return 1; | |
0f113f3e | 604 | } |
d02b48c6 | 605 | |
6b691a5c | 606 | int ssl_cert_type(X509 *x, EVP_PKEY *pkey) |
0f113f3e MC |
607 | { |
608 | EVP_PKEY *pk; | |
609 | int ret = -1, i; | |
610 | ||
611 | if (pkey == NULL) | |
612 | pk = X509_get_pubkey(x); | |
613 | else | |
614 | pk = pkey; | |
615 | if (pk == NULL) | |
616 | goto err; | |
617 | ||
618 | i = pk->type; | |
619 | if (i == EVP_PKEY_RSA) { | |
620 | ret = SSL_PKEY_RSA_ENC; | |
621 | } else if (i == EVP_PKEY_DSA) { | |
622 | ret = SSL_PKEY_DSA_SIGN; | |
623 | } | |
ea262260 | 624 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
625 | else if (i == EVP_PKEY_EC) { |
626 | ret = SSL_PKEY_ECC; | |
627 | } | |
ea262260 | 628 | #endif |
ade44dcb | 629 | else if (i == NID_id_GostR3410_2001) { |
0f113f3e MC |
630 | ret = SSL_PKEY_GOST01; |
631 | } else if (x && (i == EVP_PKEY_DH || i == EVP_PKEY_DHX)) { | |
632 | /* | |
633 | * For DH two cases: DH certificate signed with RSA and DH | |
634 | * certificate signed with DSA. | |
635 | */ | |
636 | i = X509_certificate_type(x, pk); | |
637 | if (i & EVP_PKS_RSA) | |
638 | ret = SSL_PKEY_DH_RSA; | |
639 | else if (i & EVP_PKS_DSA) | |
640 | ret = SSL_PKEY_DH_DSA; | |
641 | } | |
642 | ||
643 | err: | |
644 | if (!pkey) | |
645 | EVP_PKEY_free(pk); | |
646 | return (ret); | |
647 | } | |
d02b48c6 | 648 | |
6b691a5c | 649 | int ssl_verify_alarm_type(long type) |
0f113f3e MC |
650 | { |
651 | int al; | |
652 | ||
653 | switch (type) { | |
654 | case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: | |
655 | case X509_V_ERR_UNABLE_TO_GET_CRL: | |
656 | case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: | |
657 | al = SSL_AD_UNKNOWN_CA; | |
658 | break; | |
659 | case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: | |
660 | case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: | |
661 | case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: | |
662 | case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: | |
663 | case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: | |
664 | case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: | |
665 | case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: | |
666 | case X509_V_ERR_CERT_NOT_YET_VALID: | |
667 | case X509_V_ERR_CRL_NOT_YET_VALID: | |
668 | case X509_V_ERR_CERT_UNTRUSTED: | |
669 | case X509_V_ERR_CERT_REJECTED: | |
670 | al = SSL_AD_BAD_CERTIFICATE; | |
671 | break; | |
672 | case X509_V_ERR_CERT_SIGNATURE_FAILURE: | |
673 | case X509_V_ERR_CRL_SIGNATURE_FAILURE: | |
674 | al = SSL_AD_DECRYPT_ERROR; | |
675 | break; | |
676 | case X509_V_ERR_CERT_HAS_EXPIRED: | |
677 | case X509_V_ERR_CRL_HAS_EXPIRED: | |
678 | al = SSL_AD_CERTIFICATE_EXPIRED; | |
679 | break; | |
680 | case X509_V_ERR_CERT_REVOKED: | |
681 | al = SSL_AD_CERTIFICATE_REVOKED; | |
682 | break; | |
683 | case X509_V_ERR_OUT_OF_MEM: | |
684 | al = SSL_AD_INTERNAL_ERROR; | |
685 | break; | |
686 | case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: | |
687 | case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: | |
688 | case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: | |
689 | case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: | |
690 | case X509_V_ERR_CERT_CHAIN_TOO_LONG: | |
691 | case X509_V_ERR_PATH_LENGTH_EXCEEDED: | |
692 | case X509_V_ERR_INVALID_CA: | |
693 | al = SSL_AD_UNKNOWN_CA; | |
694 | break; | |
695 | case X509_V_ERR_APPLICATION_VERIFICATION: | |
696 | al = SSL_AD_HANDSHAKE_FAILURE; | |
697 | break; | |
698 | case X509_V_ERR_INVALID_PURPOSE: | |
699 | al = SSL_AD_UNSUPPORTED_CERTIFICATE; | |
700 | break; | |
701 | default: | |
702 | al = SSL_AD_CERTIFICATE_UNKNOWN; | |
703 | break; | |
704 | } | |
705 | return (al); | |
706 | } | |
d02b48c6 | 707 | |
b362ccab | 708 | int ssl_allow_compression(SSL *s) |
0f113f3e MC |
709 | { |
710 | if (s->options & SSL_OP_NO_COMPRESSION) | |
711 | return 0; | |
712 | return ssl_security(s, SSL_SECOP_COMPRESSION, 0, 0, NULL); | |
713 | } |