]>
Commit | Line | Data |
---|---|---|
d02b48c6 | 1 | /* ssl/s3_both.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> |
7b63c0fa | 120 | #include "ssl_locl.h" |
ec577822 BM |
121 | #include <openssl/buffer.h> |
122 | #include <openssl/rand.h> | |
123 | #include <openssl/objects.h> | |
124 | #include <openssl/evp.h> | |
125 | #include <openssl/x509.h> | |
d02b48c6 | 126 | |
0f113f3e MC |
127 | /* |
128 | * send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or | |
129 | * SSL3_RT_CHANGE_CIPHER_SPEC) | |
130 | */ | |
e7ecc7d4 | 131 | int ssl3_do_write(SSL *s, int type) |
0f113f3e MC |
132 | { |
133 | int ret; | |
134 | ||
135 | ret = ssl3_write_bytes(s, type, &s->init_buf->data[s->init_off], | |
136 | s->init_num); | |
137 | if (ret < 0) | |
138 | return (-1); | |
139 | if (type == SSL3_RT_HANDSHAKE) | |
140 | /* | |
141 | * should not be done for 'Hello Request's, but in that case we'll | |
142 | * ignore the result anyway | |
143 | */ | |
144 | ssl3_finish_mac(s, (unsigned char *)&s->init_buf->data[s->init_off], | |
145 | ret); | |
146 | ||
147 | if (ret == s->init_num) { | |
148 | if (s->msg_callback) | |
149 | s->msg_callback(1, s->version, type, s->init_buf->data, | |
150 | (size_t)(s->init_off + s->init_num), s, | |
151 | s->msg_callback_arg); | |
152 | return (1); | |
153 | } | |
154 | s->init_off += ret; | |
155 | s->init_num -= ret; | |
156 | return (0); | |
157 | } | |
e7ecc7d4 | 158 | |
c44f7540 | 159 | int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen) |
b9908bf9 MC |
160 | { |
161 | if (s->state == a) { | |
162 | if (tls_construct_finished(s, sender, slen) == 0) { | |
163 | statem_set_error(s); | |
164 | return -1; | |
165 | } | |
166 | s->state = b; | |
167 | } | |
168 | ||
169 | /* SSL3_ST_SEND_xxxxxx_HELLO_B */ | |
170 | return ssl_do_write(s); | |
171 | } | |
172 | ||
173 | int tls_construct_finished(SSL *s, const char *sender, int slen) | |
0f113f3e MC |
174 | { |
175 | unsigned char *p; | |
176 | int i; | |
177 | unsigned long l; | |
178 | ||
b9908bf9 | 179 | p = ssl_handshake_start(s); |
0f113f3e | 180 | |
b9908bf9 MC |
181 | i = s->method->ssl3_enc->final_finish_mac(s, |
182 | sender, slen, | |
183 | s->s3->tmp.finish_md); | |
184 | if (i <= 0) | |
185 | return 0; | |
186 | s->s3->tmp.finish_md_len = i; | |
187 | memcpy(p, s->s3->tmp.finish_md, i); | |
188 | l = i; | |
0f113f3e | 189 | |
b9908bf9 MC |
190 | /* |
191 | * Copy the finished so we can use it for renegotiation checks | |
192 | */ | |
193 | if (s->type == SSL_ST_CONNECT) { | |
194 | OPENSSL_assert(i <= EVP_MAX_MD_SIZE); | |
195 | memcpy(s->s3->previous_client_finished, s->s3->tmp.finish_md, i); | |
196 | s->s3->previous_client_finished_len = i; | |
197 | } else { | |
198 | OPENSSL_assert(i <= EVP_MAX_MD_SIZE); | |
199 | memcpy(s->s3->previous_server_finished, s->s3->tmp.finish_md, i); | |
200 | s->s3->previous_server_finished_len = i; | |
201 | } | |
0f113f3e | 202 | |
b9908bf9 MC |
203 | if (!ssl_set_handshake_header(s, SSL3_MT_FINISHED, l)) { |
204 | SSLerr(SSL_F_TLS_CONSTRUCT_FINISHED, ERR_R_INTERNAL_ERROR); | |
205 | return 0; | |
0f113f3e MC |
206 | } |
207 | ||
b9908bf9 | 208 | return 1; |
0f113f3e | 209 | } |
d02b48c6 | 210 | |
bf48836c | 211 | #ifndef OPENSSL_NO_NEXTPROTONEG |
0f113f3e MC |
212 | /* |
213 | * ssl3_take_mac calculates the Finished MAC for the handshakes messages seen | |
214 | * to far. | |
215 | */ | |
ee2ffc27 | 216 | static void ssl3_take_mac(SSL *s) |
0f113f3e MC |
217 | { |
218 | const char *sender; | |
219 | int slen; | |
220 | /* | |
221 | * If no new cipher setup return immediately: other functions will set | |
222 | * the appropriate error. | |
223 | */ | |
224 | if (s->s3->tmp.new_cipher == NULL) | |
225 | return; | |
226 | if (s->state & SSL_ST_CONNECT) { | |
227 | sender = s->method->ssl3_enc->server_finished_label; | |
228 | slen = s->method->ssl3_enc->server_finished_label_len; | |
229 | } else { | |
230 | sender = s->method->ssl3_enc->client_finished_label; | |
231 | slen = s->method->ssl3_enc->client_finished_label_len; | |
232 | } | |
233 | ||
234 | s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s, | |
235 | sender, | |
236 | slen, | |
237 | s->s3->tmp.peer_finish_md); | |
238 | } | |
ee2ffc27 BL |
239 | #endif |
240 | ||
657da85e MC |
241 | int ssl3_get_change_cipher_spec(SSL *s, int a, int b) |
242 | { | |
b9908bf9 | 243 | int ok; |
657da85e MC |
244 | long n; |
245 | ||
246 | n = s->method->ssl_get_message(s, a, b, SSL3_MT_CHANGE_CIPHER_SPEC, 1, &ok); | |
247 | ||
248 | if (!ok) | |
249 | return ((int)n); | |
250 | ||
b9908bf9 MC |
251 | if (tls_process_change_cipher_spec(s, n) == 0) { |
252 | statem_set_error(s); | |
253 | return -1; | |
254 | } | |
255 | ||
256 | return 1; | |
257 | } | |
258 | ||
259 | enum MSG_PROCESS_RETURN tls_process_change_cipher_spec(SSL *s, long n) | |
260 | { | |
261 | int al; | |
262 | ||
657da85e MC |
263 | /* |
264 | * 'Change Cipher Spec' is just a single byte, which should already have | |
c69f2adf MC |
265 | * been consumed by ssl_get_message() so there should be no bytes left, |
266 | * unless we're using DTLS1_BAD_VER, which has an extra 2 bytes | |
657da85e | 267 | */ |
c69f2adf MC |
268 | if (SSL_IS_DTLS(s)) { |
269 | if ((s->version == DTLS1_BAD_VER && n != DTLS1_CCS_HEADER_LENGTH + 1) | |
270 | || (s->version != DTLS1_BAD_VER | |
271 | && n != DTLS1_CCS_HEADER_LENGTH - 1)) { | |
272 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 MC |
273 | SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, |
274 | SSL_R_BAD_CHANGE_CIPHER_SPEC); | |
c69f2adf MC |
275 | goto f_err; |
276 | } | |
277 | } else { | |
278 | if (n != 0) { | |
279 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 MC |
280 | SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, |
281 | SSL_R_BAD_CHANGE_CIPHER_SPEC); | |
c69f2adf MC |
282 | goto f_err; |
283 | } | |
657da85e MC |
284 | } |
285 | ||
286 | /* Check we have a cipher to change to */ | |
287 | if (s->s3->tmp.new_cipher == NULL) { | |
288 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 289 | SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, SSL_R_CCS_RECEIVED_EARLY); |
657da85e MC |
290 | goto f_err; |
291 | } | |
292 | ||
293 | s->s3->change_cipher_spec = 1; | |
294 | if (!ssl3_do_change_cipher_spec(s)) { | |
295 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 296 | SSLerr(SSL_F_TLS_PROCESS_CHANGE_CIPHER_SPEC, ERR_R_INTERNAL_ERROR); |
657da85e MC |
297 | goto f_err; |
298 | } | |
299 | ||
c69f2adf MC |
300 | if (SSL_IS_DTLS(s)) { |
301 | dtls1_reset_seq_numbers(s, SSL3_CC_READ); | |
302 | ||
303 | if (s->version == DTLS1_BAD_VER) | |
304 | s->d1->handshake_read_seq++; | |
305 | ||
306 | #ifndef OPENSSL_NO_SCTP | |
307 | /* | |
308 | * Remember that a CCS has been received, so that an old key of | |
309 | * SCTP-Auth can be deleted when a CCS is sent. Will be ignored if no | |
310 | * SCTP is used | |
311 | */ | |
312 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD, 1, NULL); | |
313 | #endif | |
314 | } | |
315 | ||
b9908bf9 | 316 | return MSG_PROCESS_CONTINUE_READING; |
657da85e MC |
317 | f_err: |
318 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
b9908bf9 MC |
319 | statem_set_error(s); |
320 | return MSG_PROCESS_ERROR; | |
657da85e MC |
321 | } |
322 | ||
323 | ||
6b691a5c | 324 | int ssl3_get_finished(SSL *s, int a, int b) |
0f113f3e | 325 | { |
b9908bf9 | 326 | int ok; |
0f113f3e | 327 | long n; |
d02b48c6 | 328 | |
bf48836c | 329 | #ifdef OPENSSL_NO_NEXTPROTONEG |
0f113f3e MC |
330 | /* |
331 | * the mac has already been generated when we received the change cipher | |
332 | * spec message and is in s->s3->tmp.peer_finish_md | |
333 | */ | |
ee2ffc27 | 334 | #endif |
d02b48c6 | 335 | |
0f113f3e MC |
336 | /* 64 argument should actually be 36+4 :-) */ |
337 | n = s->method->ssl_get_message(s, a, b, SSL3_MT_FINISHED, 64, &ok); | |
338 | ||
339 | if (!ok) | |
340 | return ((int)n); | |
341 | ||
b9908bf9 MC |
342 | return tls_process_finished(s, (unsigned long)n); |
343 | } | |
344 | ||
345 | enum MSG_PROCESS_RETURN tls_process_finished(SSL *s, unsigned long n) | |
346 | { | |
347 | int al, i; | |
348 | unsigned char *p; | |
349 | ||
0f113f3e MC |
350 | /* If this occurs, we have missed a message */ |
351 | if (!s->s3->change_cipher_spec) { | |
352 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 353 | SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_GOT_A_FIN_BEFORE_A_CCS); |
0f113f3e MC |
354 | goto f_err; |
355 | } | |
356 | s->s3->change_cipher_spec = 0; | |
357 | ||
358 | p = (unsigned char *)s->init_msg; | |
359 | i = s->s3->tmp.peer_finish_md_len; | |
360 | ||
b9908bf9 | 361 | if (i < 0 || (unsigned long)i != n) { |
0f113f3e | 362 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 363 | SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_BAD_DIGEST_LENGTH); |
0f113f3e MC |
364 | goto f_err; |
365 | } | |
366 | ||
367 | if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) { | |
368 | al = SSL_AD_DECRYPT_ERROR; | |
b9908bf9 | 369 | SSLerr(SSL_F_TLS_PROCESS_FINISHED, SSL_R_DIGEST_CHECK_FAILED); |
0f113f3e MC |
370 | goto f_err; |
371 | } | |
372 | ||
373 | /* | |
374 | * Copy the finished so we can use it for renegotiation checks | |
375 | */ | |
376 | if (s->type == SSL_ST_ACCEPT) { | |
377 | OPENSSL_assert(i <= EVP_MAX_MD_SIZE); | |
378 | memcpy(s->s3->previous_client_finished, s->s3->tmp.peer_finish_md, i); | |
379 | s->s3->previous_client_finished_len = i; | |
380 | } else { | |
381 | OPENSSL_assert(i <= EVP_MAX_MD_SIZE); | |
382 | memcpy(s->s3->previous_server_finished, s->s3->tmp.peer_finish_md, i); | |
383 | s->s3->previous_server_finished_len = i; | |
384 | } | |
385 | ||
b9908bf9 | 386 | return MSG_PROCESS_CONTINUE_PROCESSING; |
0f113f3e MC |
387 | f_err: |
388 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
b9908bf9 MC |
389 | statem_set_error(s); |
390 | return MSG_PROCESS_ERROR; | |
0f113f3e | 391 | } |
d02b48c6 | 392 | |
1d97c843 TH |
393 | /*- |
394 | * for these 2 messages, we need to | |
0f113f3e | 395 | * ssl->enc_read_ctx re-init |
de07f311 | 396 | * ssl->rlayer.read_sequence zero |
0f113f3e MC |
397 | * ssl->s3->read_mac_secret re-init |
398 | * ssl->session->read_sym_enc assign | |
399 | * ssl->session->read_compression assign | |
400 | * ssl->session->read_hash assign | |
d02b48c6 | 401 | */ |
6b691a5c | 402 | int ssl3_send_change_cipher_spec(SSL *s, int a, int b) |
0f113f3e | 403 | { |
0f113f3e | 404 | if (s->state == a) { |
b9908bf9 MC |
405 | if(tls_construct_change_cipher_spec(s) == 0) { |
406 | statem_set_error(s); | |
407 | return 0; | |
408 | } | |
d02b48c6 | 409 | |
0f113f3e MC |
410 | s->state = b; |
411 | } | |
d02b48c6 | 412 | |
0f113f3e MC |
413 | /* SSL3_ST_CW_CHANGE_B */ |
414 | return (ssl3_do_write(s, SSL3_RT_CHANGE_CIPHER_SPEC)); | |
415 | } | |
d02b48c6 | 416 | |
b9908bf9 MC |
417 | int tls_construct_change_cipher_spec(SSL *s) |
418 | { | |
419 | unsigned char *p; | |
420 | ||
421 | p = (unsigned char *)s->init_buf->data; | |
422 | *p = SSL3_MT_CCS; | |
423 | s->init_num = 1; | |
424 | s->init_off = 0; | |
425 | ||
426 | return 1; | |
427 | } | |
428 | ||
c526ed41 | 429 | unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk) |
0f113f3e MC |
430 | { |
431 | unsigned char *p; | |
432 | unsigned long l = 3 + SSL_HM_HEADER_LENGTH(s); | |
433 | ||
434 | if (!ssl_add_cert_chain(s, cpk, &l)) | |
435 | return 0; | |
436 | ||
437 | l -= 3 + SSL_HM_HEADER_LENGTH(s); | |
438 | p = ssl_handshake_start(s); | |
439 | l2n3(l, p); | |
440 | l += 3; | |
77d514c5 | 441 | |
61986d32 | 442 | if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE, l)) { |
77d514c5 MC |
443 | SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN, ERR_R_INTERNAL_ERROR); |
444 | return 0; | |
445 | } | |
0f113f3e MC |
446 | return l + SSL_HM_HEADER_LENGTH(s); |
447 | } | |
448 | ||
449 | /* | |
450 | * Obtain handshake message of message type 'mt' (any if mt == -1), maximum | |
451 | * acceptable body length 'max'. The first four bytes (msg_type and length) | |
452 | * are read in state 'st1', the body is read in state 'stn'. | |
52732b38 | 453 | */ |
6b691a5c | 454 | long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok) |
0f113f3e MC |
455 | { |
456 | unsigned char *p; | |
0f113f3e | 457 | long n; |
9ab930b2 | 458 | int al, mtin; |
0f113f3e MC |
459 | |
460 | if (s->s3->tmp.reuse_message) { | |
461 | s->s3->tmp.reuse_message = 0; | |
462 | if ((mt >= 0) && (s->s3->tmp.message_type != mt)) { | |
463 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
464 | SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); | |
465 | goto f_err; | |
466 | } | |
467 | *ok = 1; | |
468 | s->state = stn; | |
32ec4153 | 469 | s->init_msg = s->init_buf->data + SSL3_HM_HEADER_LENGTH; |
0f113f3e MC |
470 | s->init_num = (int)s->s3->tmp.message_size; |
471 | return s->init_num; | |
472 | } | |
473 | ||
474 | p = (unsigned char *)s->init_buf->data; | |
475 | ||
d45ba43d | 476 | if (s->state == st1) { |
9ab930b2 MC |
477 | if (tls_get_message_header(s, &mtin) == 0) { |
478 | /* Could be NBIO */ | |
479 | *ok = 0; | |
480 | return -1; | |
481 | } | |
482 | s->state = stn; | |
483 | if (s->init_num == 0 | |
484 | && mtin == SSL3_MT_CHANGE_CIPHER_SPEC | |
485 | && (mt < 0 || mt == SSL3_MT_CHANGE_CIPHER_SPEC)) { | |
486 | if (*p != SSL3_MT_CCS) { | |
487 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
488 | SSLerr(SSL_F_SSL3_GET_MESSAGE, | |
489 | SSL_R_UNEXPECTED_MESSAGE); | |
490 | goto f_err; | |
0f113f3e | 491 | } |
9ab930b2 MC |
492 | s->init_msg = p + 1; |
493 | s->s3->tmp.message_type = SSL3_MT_CHANGE_CIPHER_SPEC; | |
494 | s->s3->tmp.message_size = s->init_num; | |
495 | *ok = 1; | |
496 | if (s->msg_callback) | |
497 | s->msg_callback(0, s->version, | |
498 | SSL3_RT_CHANGE_CIPHER_SPEC, p, 1, s, | |
499 | s->msg_callback_arg); | |
500 | return s->init_num; | |
501 | } | |
502 | if (s->s3->tmp.message_size > (unsigned long)max) { | |
503 | al = SSL_AD_ILLEGAL_PARAMETER; | |
504 | SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_EXCESSIVE_MESSAGE_SIZE); | |
505 | goto f_err; | |
506 | } | |
507 | if ((mt >= 0) && (mtin != mt)) { | |
0f113f3e MC |
508 | al = SSL_AD_UNEXPECTED_MESSAGE; |
509 | SSLerr(SSL_F_SSL3_GET_MESSAGE, SSL_R_UNEXPECTED_MESSAGE); | |
510 | goto f_err; | |
511 | } | |
9ab930b2 | 512 | } |
0f113f3e | 513 | |
9ab930b2 MC |
514 | /* next state (stn) */ |
515 | if (tls_get_message_body(s, (unsigned long *)&n) == 0) { | |
516 | *ok = 0; | |
517 | return n; | |
518 | } | |
0f113f3e | 519 | |
9ab930b2 MC |
520 | *ok = 1; |
521 | return n; | |
522 | f_err: | |
523 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
f8e0a557 | 524 | statem_set_error(s); |
9ab930b2 MC |
525 | *ok = 0; |
526 | return 0; | |
527 | } | |
528 | ||
529 | int tls_get_message_header(SSL *s, int *mt) | |
530 | { | |
531 | /* s->init_num < SSL3_HM_HEADER_LENGTH */ | |
532 | int skip_message, i, recvd_type, al; | |
533 | unsigned char *p; | |
534 | unsigned long l; | |
535 | ||
536 | p = (unsigned char *)s->init_buf->data; | |
537 | ||
538 | do { | |
539 | while (s->init_num < SSL3_HM_HEADER_LENGTH) { | |
540 | i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, &recvd_type, | |
541 | &p[s->init_num], SSL3_HM_HEADER_LENGTH - s->init_num, 0); | |
542 | if (i <= 0) { | |
543 | s->rwstate = SSL_READING; | |
544 | return 0; | |
32ec4153 | 545 | } |
9ab930b2 MC |
546 | if (recvd_type == SSL3_RT_CHANGE_CIPHER_SPEC) { |
547 | s->s3->tmp.message_type = *mt = SSL3_MT_CHANGE_CIPHER_SPEC; | |
548 | s->init_num = i - 1; | |
549 | s->s3->tmp.message_size = i; | |
550 | return 1; | |
551 | } else if (recvd_type != SSL3_RT_HANDSHAKE) { | |
552 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
553 | SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, SSL_R_CCS_RECEIVED_EARLY); | |
32ec4153 MC |
554 | goto f_err; |
555 | } | |
9ab930b2 MC |
556 | s->init_num += i; |
557 | } | |
558 | ||
559 | skip_message = 0; | |
560 | if (!s->server) | |
561 | if (p[0] == SSL3_MT_HELLO_REQUEST) | |
562 | /* | |
563 | * The server may always send 'Hello Request' messages -- | |
564 | * we are doing a handshake anyway now, so ignore them if | |
565 | * their format is correct. Does not count for 'Finished' | |
566 | * MAC. | |
567 | */ | |
568 | if (p[1] == 0 && p[2] == 0 && p[3] == 0) { | |
569 | s->init_num = 0; | |
570 | skip_message = 1; | |
571 | ||
572 | if (s->msg_callback) | |
573 | s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, | |
574 | p, SSL3_HM_HEADER_LENGTH, s, | |
575 | s->msg_callback_arg); | |
576 | } | |
577 | } while (skip_message); | |
578 | /* s->init_num == SSL3_HM_HEADER_LENGTH */ | |
579 | ||
580 | *mt = *p; | |
581 | s->s3->tmp.message_type = *(p++); | |
32ec4153 | 582 | |
9ab930b2 MC |
583 | if(RECORD_LAYER_is_sslv2_record(&s->rlayer)) { |
584 | /* | |
585 | * Only happens with SSLv3+ in an SSLv2 backward compatible | |
586 | * ClientHello | |
587 | */ | |
588 | /* | |
589 | * Total message size is the remaining record bytes to read | |
590 | * plus the SSL3_HM_HEADER_LENGTH bytes that we already read | |
591 | */ | |
592 | l = RECORD_LAYER_get_rrec_length(&s->rlayer) | |
593 | + SSL3_HM_HEADER_LENGTH; | |
594 | if (l && !BUF_MEM_grow_clean(s->init_buf, (int)l)) { | |
595 | SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, ERR_R_BUF_LIB); | |
596 | goto err; | |
597 | } | |
598 | s->s3->tmp.message_size = l; | |
599 | ||
600 | s->init_msg = s->init_buf->data; | |
601 | s->init_num = SSL3_HM_HEADER_LENGTH; | |
602 | } else { | |
603 | n2l3(p, l); | |
604 | /* BUF_MEM_grow takes an 'int' parameter */ | |
605 | if (l > (INT_MAX - SSL3_HM_HEADER_LENGTH)) { | |
606 | al = SSL_AD_ILLEGAL_PARAMETER; | |
607 | SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, SSL_R_EXCESSIVE_MESSAGE_SIZE); | |
608 | goto f_err; | |
32ec4153 | 609 | } |
9ab930b2 MC |
610 | if (l && !BUF_MEM_grow_clean(s->init_buf, |
611 | (int)l + SSL3_HM_HEADER_LENGTH)) { | |
612 | SSLerr(SSL_F_TLS_GET_MESSAGE_HEADER, ERR_R_BUF_LIB); | |
613 | goto err; | |
614 | } | |
615 | s->s3->tmp.message_size = l; | |
616 | ||
617 | s->init_msg = s->init_buf->data + SSL3_HM_HEADER_LENGTH; | |
618 | s->init_num = 0; | |
619 | } | |
620 | ||
621 | return 1; | |
622 | f_err: | |
623 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
624 | err: | |
625 | return 0; | |
626 | } | |
627 | ||
628 | int tls_get_message_body(SSL *s, unsigned long *len) | |
629 | { | |
630 | long n; | |
631 | unsigned char *p; | |
632 | int i; | |
633 | ||
634 | if (s->s3->tmp.message_type == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
635 | /* We've already read everything in */ | |
636 | *len = (unsigned long)s->init_num; | |
637 | return 1; | |
0f113f3e MC |
638 | } |
639 | ||
0f113f3e MC |
640 | p = s->init_msg; |
641 | n = s->s3->tmp.message_size - s->init_num; | |
642 | while (n > 0) { | |
657da85e MC |
643 | i = s->method->ssl_read_bytes(s, SSL3_RT_HANDSHAKE, NULL, |
644 | &p[s->init_num], n, 0); | |
0f113f3e MC |
645 | if (i <= 0) { |
646 | s->rwstate = SSL_READING; | |
9ab930b2 MC |
647 | *len = 0; |
648 | return 0; | |
0f113f3e MC |
649 | } |
650 | s->init_num += i; | |
651 | n -= i; | |
652 | } | |
ee2ffc27 | 653 | |
bf48836c | 654 | #ifndef OPENSSL_NO_NEXTPROTONEG |
0f113f3e MC |
655 | /* |
656 | * If receiving Finished, record MAC of prior handshake messages for | |
657 | * Finished verification. | |
658 | */ | |
659 | if (*s->init_buf->data == SSL3_MT_FINISHED) | |
660 | ssl3_take_mac(s); | |
ee2ffc27 BL |
661 | #endif |
662 | ||
0f113f3e | 663 | /* Feed this message into MAC computation. */ |
32ec4153 MC |
664 | if(RECORD_LAYER_is_sslv2_record(&s->rlayer)) { |
665 | ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num); | |
32ec4153 MC |
666 | if (s->msg_callback) |
667 | s->msg_callback(0, SSL2_VERSION, 0, s->init_buf->data, | |
668 | (size_t)s->init_num, s, s->msg_callback_arg); | |
669 | } else { | |
670 | ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, | |
671 | s->init_num + SSL3_HM_HEADER_LENGTH); | |
672 | if (s->msg_callback) | |
673 | s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, | |
674 | (size_t)s->init_num + SSL3_HM_HEADER_LENGTH, s, | |
675 | s->msg_callback_arg); | |
676 | } | |
677 | ||
9ab930b2 MC |
678 | /* |
679 | * init_num should never be negative...should probably be declared | |
680 | * unsigned | |
681 | */ | |
682 | if (s->init_num < 0) { | |
683 | SSLerr(SSL_F_TLS_GET_MESSAGE_BODY, ERR_R_INTERNAL_ERROR); | |
684 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
685 | *len = 0; | |
686 | return 0; | |
687 | } | |
688 | *len = (unsigned long)s->init_num; | |
689 | return 1; | |
0f113f3e | 690 | } |
d02b48c6 | 691 | |
6b691a5c | 692 | int ssl_cert_type(X509 *x, EVP_PKEY *pkey) |
0f113f3e MC |
693 | { |
694 | EVP_PKEY *pk; | |
695 | int ret = -1, i; | |
696 | ||
697 | if (pkey == NULL) | |
698 | pk = X509_get_pubkey(x); | |
699 | else | |
700 | pk = pkey; | |
701 | if (pk == NULL) | |
702 | goto err; | |
703 | ||
704 | i = pk->type; | |
705 | if (i == EVP_PKEY_RSA) { | |
706 | ret = SSL_PKEY_RSA_ENC; | |
707 | } else if (i == EVP_PKEY_DSA) { | |
708 | ret = SSL_PKEY_DSA_SIGN; | |
709 | } | |
ea262260 | 710 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
711 | else if (i == EVP_PKEY_EC) { |
712 | ret = SSL_PKEY_ECC; | |
713 | } | |
ea262260 | 714 | #endif |
ade44dcb | 715 | else if (i == NID_id_GostR3410_2001) { |
0f113f3e MC |
716 | ret = SSL_PKEY_GOST01; |
717 | } else if (x && (i == EVP_PKEY_DH || i == EVP_PKEY_DHX)) { | |
718 | /* | |
719 | * For DH two cases: DH certificate signed with RSA and DH | |
720 | * certificate signed with DSA. | |
721 | */ | |
722 | i = X509_certificate_type(x, pk); | |
723 | if (i & EVP_PKS_RSA) | |
724 | ret = SSL_PKEY_DH_RSA; | |
725 | else if (i & EVP_PKS_DSA) | |
726 | ret = SSL_PKEY_DH_DSA; | |
727 | } | |
728 | ||
729 | err: | |
730 | if (!pkey) | |
731 | EVP_PKEY_free(pk); | |
732 | return (ret); | |
733 | } | |
d02b48c6 | 734 | |
6b691a5c | 735 | int ssl_verify_alarm_type(long type) |
0f113f3e MC |
736 | { |
737 | int al; | |
738 | ||
739 | switch (type) { | |
740 | case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: | |
741 | case X509_V_ERR_UNABLE_TO_GET_CRL: | |
742 | case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: | |
743 | al = SSL_AD_UNKNOWN_CA; | |
744 | break; | |
745 | case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: | |
746 | case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: | |
747 | case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: | |
748 | case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: | |
749 | case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: | |
750 | case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: | |
751 | case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: | |
752 | case X509_V_ERR_CERT_NOT_YET_VALID: | |
753 | case X509_V_ERR_CRL_NOT_YET_VALID: | |
754 | case X509_V_ERR_CERT_UNTRUSTED: | |
755 | case X509_V_ERR_CERT_REJECTED: | |
756 | al = SSL_AD_BAD_CERTIFICATE; | |
757 | break; | |
758 | case X509_V_ERR_CERT_SIGNATURE_FAILURE: | |
759 | case X509_V_ERR_CRL_SIGNATURE_FAILURE: | |
760 | al = SSL_AD_DECRYPT_ERROR; | |
761 | break; | |
762 | case X509_V_ERR_CERT_HAS_EXPIRED: | |
763 | case X509_V_ERR_CRL_HAS_EXPIRED: | |
764 | al = SSL_AD_CERTIFICATE_EXPIRED; | |
765 | break; | |
766 | case X509_V_ERR_CERT_REVOKED: | |
767 | al = SSL_AD_CERTIFICATE_REVOKED; | |
768 | break; | |
769 | case X509_V_ERR_OUT_OF_MEM: | |
770 | al = SSL_AD_INTERNAL_ERROR; | |
771 | break; | |
772 | case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: | |
773 | case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: | |
774 | case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: | |
775 | case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: | |
776 | case X509_V_ERR_CERT_CHAIN_TOO_LONG: | |
777 | case X509_V_ERR_PATH_LENGTH_EXCEEDED: | |
778 | case X509_V_ERR_INVALID_CA: | |
779 | al = SSL_AD_UNKNOWN_CA; | |
780 | break; | |
781 | case X509_V_ERR_APPLICATION_VERIFICATION: | |
782 | al = SSL_AD_HANDSHAKE_FAILURE; | |
783 | break; | |
784 | case X509_V_ERR_INVALID_PURPOSE: | |
785 | al = SSL_AD_UNSUPPORTED_CERTIFICATE; | |
786 | break; | |
787 | default: | |
788 | al = SSL_AD_CERTIFICATE_UNKNOWN; | |
789 | break; | |
790 | } | |
791 | return (al); | |
792 | } | |
d02b48c6 | 793 | |
b362ccab | 794 | int ssl_allow_compression(SSL *s) |
0f113f3e MC |
795 | { |
796 | if (s->options & SSL_OP_NO_COMPRESSION) | |
797 | return 0; | |
798 | return ssl_security(s, SSL_SECOP_COMPRESSION, 0, 0, NULL); | |
799 | } |