1 /* ssl/s3_both.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
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 */
111 /* ====================================================================
112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 * ECC cipher suite support in OpenSSL originally developed by
114 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
115 */
116
117 #include <limits.h>
118 #include <string.h>
119 #include <stdio.h>
120 #include "ssl_locl.h"
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>
126
127 /* send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or SSL3_RT_CHANGE_CIPHER_SPEC) */
128 int ssl3_do_write(SSL *s, int type)
129 {
130 int ret;
131
132 ret=ssl3_write_bytes(s,type,&s->init_buf->data[s->init_off],
133 s->init_num);
134 if (ret < 0) return(-1);
135 if (type == SSL3_RT_HANDSHAKE)
136 /* should not be done for 'Hello Request's, but in that case
137 * we'll ignore the result anyway */
138 ssl3_finish_mac(s,(unsigned char *)&s->init_buf->data[s->init_off],ret);
139
140 if (ret == s->init_num)
141 {
142 if (s->msg_callback)
143 s->msg_callback(1, s->version, type, s->init_buf->data, (size_t)(s->init_off + s->init_num), s, s->msg_callback_arg);
144 return(1);
145 }
146 s->init_off+=ret;
147 s->init_num-=ret;
148 return(0);
149 }
150
151 int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
152 {
153 unsigned char *p,*d;
154 int i;
155 unsigned long l;
156
157 if (s->state == a)
158 {
159 d=(unsigned char *)s->init_buf->data;
160 p= &(d[4]);
161
162 i=s->method->ssl3_enc->final_finish_mac(s,
163 sender,slen,s->s3->tmp.finish_md);
164 if (i == 0)
165 return 0;
166 s->s3->tmp.finish_md_len = i;
167 memcpy(p, s->s3->tmp.finish_md, i);
168 p+=i;
169 l=i;
170
171 /* Copy the finished so we can use it for
172 renegotiation checks */
173 if(s->type == SSL_ST_CONNECT)
174 {
175 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
176 memcpy(s->s3->previous_client_finished,
177 s->s3->tmp.finish_md, i);
178 s->s3->previous_client_finished_len=i;
179 }
180 else
181 {
182 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
183 memcpy(s->s3->previous_server_finished,
184 s->s3->tmp.finish_md, i);
185 s->s3->previous_server_finished_len=i;
186 }
187
188 #ifdef OPENSSL_SYS_WIN16
189 /* MSVC 1.5 does not clear the top bytes of the word unless
190 * I do this.
191 */
192 l&=0xffff;
193 #endif
194
195 *(d++)=SSL3_MT_FINISHED;
196 l2n3(l,d);
197 s->init_num=(int)l+4;
198 s->init_off=0;
199
200 s->state=b;
201 }
202
203 /* SSL3_ST_SEND_xxxxxx_HELLO_B */
204 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
205 }
206
207 #ifndef OPENSSL_NO_NEXTPROTONEG
208 /* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen to far. */
209 static void ssl3_take_mac(SSL *s)
210 {
211 const char *sender;
212 int slen;
213 /* If no new cipher setup return immediately: other functions will
214 * set the appropriate error.
215 */
216 if (s->s3->tmp.new_cipher == NULL)
217 return;
218 if (s->state & SSL_ST_CONNECT)
219 {
220 sender=s->method->ssl3_enc->server_finished_label;
221 slen=s->method->ssl3_enc->server_finished_label_len;
222 }
223 else
224 {
225 sender=s->method->ssl3_enc->client_finished_label;
226 slen=s->method->ssl3_enc->client_finished_label_len;
227 }
228
229 s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
230 sender,slen,s->s3->tmp.peer_finish_md);
231 }
232 #endif
233
234 int ssl3_get_finished(SSL *s, int a, int b)
235 {
236 int al,i,ok;
237 long n;
238 unsigned char *p;
239
240 #ifdef OPENSSL_NO_NEXTPROTONEG
241 /* the mac has already been generated when we received the
242 * change cipher spec message and is in s->s3->tmp.peer_finish_md.
243 */
244 #endif
245
246 n=s->method->ssl_get_message(s,
247 a,
248 b,
249 SSL3_MT_FINISHED,
250 64, /* should actually be 36+4 :-) */
251 &ok);
252
253 if (!ok) return((int)n);
254
255 /* If this occurs, we have missed a message */
256 if (!s->s3->change_cipher_spec)
257 {
258 al=SSL_AD_UNEXPECTED_MESSAGE;
259 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
260 goto f_err;
261 }
262 s->s3->change_cipher_spec=0;
263
264 p = (unsigned char *)s->init_msg;
265 i = s->s3->tmp.peer_finish_md_len;
266
267 if (i != n)
268 {
269 al=SSL_AD_DECODE_ERROR;
270 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
271 goto f_err;
272 }
273
274 if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
275 {
276 al=SSL_AD_DECRYPT_ERROR;
277 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
278 goto f_err;
279 }
280
281 /* Copy the finished so we can use it for
282 renegotiation checks */
283 if(s->type == SSL_ST_ACCEPT)
284 {
285 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
286 memcpy(s->s3->previous_client_finished,
287 s->s3->tmp.peer_finish_md, i);
288 s->s3->previous_client_finished_len=i;
289 }
290 else
291 {
292 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
293 memcpy(s->s3->previous_server_finished,
294 s->s3->tmp.peer_finish_md, i);
295 s->s3->previous_server_finished_len=i;
296 }
297
298 return(1);
299 f_err:
300 ssl3_send_alert(s,SSL3_AL_FATAL,al);
301 return(0);
302 }
303
304 /* for these 2 messages, we need to
305 * ssl->enc_read_ctx re-init
306 * ssl->s3->read_sequence zero
307 * ssl->s3->read_mac_secret re-init
308 * ssl->session->read_sym_enc assign
309 * ssl->session->read_compression assign
310 * ssl->session->read_hash assign
311 */
312 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
313 {
314 unsigned char *p;
315
316 if (s->state == a)
317 {
318 p=(unsigned char *)s->init_buf->data;
319 *p=SSL3_MT_CCS;
320 s->init_num=1;
321 s->init_off=0;
322
323 s->state=b;
324 }
325
326 /* SSL3_ST_CW_CHANGE_B */
327 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
328 }
329
330 static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
331 {
332 int n;
333 unsigned char *p;
334
335 n=i2d_X509(x,NULL);
336 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
337 {
338 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
339 return(-1);
340 }
341 p=(unsigned char *)&(buf->data[*l]);
342 l2n3(n,p);
343 i2d_X509(x,&p);
344 *l+=n+3;
345
346 return(0);
347 }
348
349 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
350 {
351 unsigned char *p;
352 int i;
353 unsigned long l=7;
354 BUF_MEM *buf;
355 int no_chain;
356
357 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs)
358 no_chain = 1;
359 else
360 no_chain = 0;
361
362 /* TLSv1 sends a chain with nothing in it, instead of an alert */
363 buf=s->init_buf;
364 if (!BUF_MEM_grow_clean(buf,10))
365 {
366 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
367 return(0);
368 }
369 if (x != NULL)
370 {
371 if (no_chain)
372 {
373 if (ssl3_add_cert_to_buf(buf, &l, x))
374 return(0);
375 }
376 else
377 {
378 X509_STORE_CTX xs_ctx;
379
380 if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
381 {
382 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
383 return(0);
384 }
385 X509_verify_cert(&xs_ctx);
386 /* Don't leave errors in the queue */
387 ERR_clear_error();
388 for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
389 {
390 x = sk_X509_value(xs_ctx.chain, i);
391
392 if (ssl3_add_cert_to_buf(buf, &l, x))
393 {
394 X509_STORE_CTX_cleanup(&xs_ctx);
395 return 0;
396 }
397 }
398 X509_STORE_CTX_cleanup(&xs_ctx);
399 }
400 }
401 /* Thawte special :-) */
402 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
403 {
404 x=sk_X509_value(s->ctx->extra_certs,i);
405 if (ssl3_add_cert_to_buf(buf, &l, x))
406 return(0);
407 }
408
409 l-=7;
410 p=(unsigned char *)&(buf->data[4]);
411 l2n3(l,p);
412 l+=3;
413 p=(unsigned char *)&(buf->data[0]);
414 *(p++)=SSL3_MT_CERTIFICATE;
415 l2n3(l,p);
416 l+=4;
417 return(l);
418 }
419
420 /* Obtain handshake message of message type 'mt' (any if mt == -1),
421 * maximum acceptable body length 'max'.
422 * The first four bytes (msg_type and length) are read in state 'st1',
423 * the body is read in state 'stn'.
424 */
425 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
426 {
427 unsigned char *p;
428 unsigned long l;
429 long n;
430 int i,al;
431
432 if (s->s3->tmp.reuse_message)
433 {
434 s->s3->tmp.reuse_message=0;
435 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
436 {
437 al=SSL_AD_UNEXPECTED_MESSAGE;
438 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
439 goto f_err;
440 }
441 *ok=1;
442 s->init_msg = s->init_buf->data + 4;
443 s->init_num = (int)s->s3->tmp.message_size;
444 return s->init_num;
445 }
446
447 p=(unsigned char *)s->init_buf->data;
448
449 if (s->state == st1) /* s->init_num < 4 */
450 {
451 int skip_message;
452
453 do
454 {
455 while (s->init_num < 4)
456 {
457 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
458 &p[s->init_num],4 - s->init_num, 0);
459 if (i <= 0)
460 {
461 s->rwstate=SSL_READING;
462 *ok = 0;
463 return i;
464 }
465 s->init_num+=i;
466 }
467
468 skip_message = 0;
469 if (!s->server)
470 if (p[0] == SSL3_MT_HELLO_REQUEST)
471 /* The server may always send 'Hello Request' messages --
472 * we are doing a handshake anyway now, so ignore them
473 * if their format is correct. Does not count for
474 * 'Finished' MAC. */
475 if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
476 {
477 s->init_num = 0;
478 skip_message = 1;
479
480 if (s->msg_callback)
481 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
482 }
483 }
484 while (skip_message);
485
486 /* s->init_num == 4 */
487
488 if ((mt >= 0) && (*p != mt))
489 {
490 al=SSL_AD_UNEXPECTED_MESSAGE;
491 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
492 goto f_err;
493 }
494 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
495 (st1 == SSL3_ST_SR_CERT_A) &&
496 (stn == SSL3_ST_SR_CERT_B))
497 {
498 /* At this point we have got an MS SGC second client
499 * hello (maybe we should always allow the client to
500 * start a new handshake?). We need to restart the mac.
501 * Don't increment {num,total}_renegotiations because
502 * we have not completed the handshake. */
503 ssl3_init_finished_mac(s);
504 }
505
506 s->s3->tmp.message_type= *(p++);
507
508 n2l3(p,l);
509 if (l > (unsigned long)max)
510 {
511 al=SSL_AD_ILLEGAL_PARAMETER;
512 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
513 goto f_err;
514 }
515 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
516 {
517 al=SSL_AD_ILLEGAL_PARAMETER;
518 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
519 goto f_err;
520 }
521 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
522 {
523 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
524 goto err;
525 }
526 s->s3->tmp.message_size=l;
527 s->state=stn;
528
529 s->init_msg = s->init_buf->data + 4;
530 s->init_num = 0;
531 }
532
533 /* next state (stn) */
534 p = s->init_msg;
535 n = s->s3->tmp.message_size - s->init_num;
536 while (n > 0)
537 {
538 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
539 if (i <= 0)
540 {
541 s->rwstate=SSL_READING;
542 *ok = 0;
543 return i;
544 }
545 s->init_num += i;
546 n -= i;
547 }
548
549 #ifndef OPENSSL_NO_NEXTPROTONEG
550 /* If receiving Finished, record MAC of prior handshake messages for
551 * Finished verification. */
552 if (*s->init_buf->data == SSL3_MT_FINISHED)
553 ssl3_take_mac(s);
554 #endif
555
556 /* Feed this message into MAC computation. */
557 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
558 if (s->msg_callback)
559 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
560 *ok=1;
561 return s->init_num;
562 f_err:
563 ssl3_send_alert(s,SSL3_AL_FATAL,al);
564 err:
565 *ok=0;
566 return(-1);
567 }
568
569 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
570 {
571 EVP_PKEY *pk;
572 int ret= -1,i;
573
574 if (pkey == NULL)
575 pk=X509_get_pubkey(x);
576 else
577 pk=pkey;
578 if (pk == NULL) goto err;
579
580 i=pk->type;
581 if (i == EVP_PKEY_RSA)
582 {
583 ret=SSL_PKEY_RSA_ENC;
584 }
585 else if (i == EVP_PKEY_DSA)
586 {
587 ret=SSL_PKEY_DSA_SIGN;
588 }
589 #ifndef OPENSSL_NO_EC
590 else if (i == EVP_PKEY_EC)
591 {
592 ret = SSL_PKEY_ECC;
593 }
594 #endif
595 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc)
596 {
597 ret = SSL_PKEY_GOST94;
598 }
599 else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc)
600 {
601 ret = SSL_PKEY_GOST01;
602 }
603 err:
604 if(!pkey) EVP_PKEY_free(pk);
605 return(ret);
606 }
607
608 int ssl_verify_alarm_type(long type)
609 {
610 int al;
611
612 switch(type)
613 {
614 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
615 case X509_V_ERR_UNABLE_TO_GET_CRL:
616 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
617 al=SSL_AD_UNKNOWN_CA;
618 break;
619 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
620 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
621 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
622 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
623 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
624 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
625 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
626 case X509_V_ERR_CERT_NOT_YET_VALID:
627 case X509_V_ERR_CRL_NOT_YET_VALID:
628 case X509_V_ERR_CERT_UNTRUSTED:
629 case X509_V_ERR_CERT_REJECTED:
630 al=SSL_AD_BAD_CERTIFICATE;
631 break;
632 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
633 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
634 al=SSL_AD_DECRYPT_ERROR;
635 break;
636 case X509_V_ERR_CERT_HAS_EXPIRED:
637 case X509_V_ERR_CRL_HAS_EXPIRED:
638 al=SSL_AD_CERTIFICATE_EXPIRED;
639 break;
640 case X509_V_ERR_CERT_REVOKED:
641 al=SSL_AD_CERTIFICATE_REVOKED;
642 break;
643 case X509_V_ERR_OUT_OF_MEM:
644 al=SSL_AD_INTERNAL_ERROR;
645 break;
646 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
647 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
648 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
649 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
650 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
651 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
652 case X509_V_ERR_INVALID_CA:
653 al=SSL_AD_UNKNOWN_CA;
654 break;
655 case X509_V_ERR_APPLICATION_VERIFICATION:
656 al=SSL_AD_HANDSHAKE_FAILURE;
657 break;
658 case X509_V_ERR_INVALID_PURPOSE:
659 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
660 break;
661 default:
662 al=SSL_AD_CERTIFICATE_UNKNOWN;
663 break;
664 }
665 return(al);
666 }
667
668 #ifndef OPENSSL_NO_BUF_FREELISTS
669 /* On some platforms, malloc() performance is bad enough that you can't just
670 * free() and malloc() buffers all the time, so we need to use freelists from
671 * unused buffers. Currently, each freelist holds memory chunks of only a
672 * given size (list->chunklen); other sized chunks are freed and malloced.
673 * This doesn't help much if you're using many different SSL option settings
674 * with a given context. (The options affecting buffer size are
675 * max_send_fragment, read buffer vs write buffer,
676 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and
677 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every
678 * possible size is not an option, since max_send_fragment can take on many
679 * different values.
680 *
681 * If you are on a platform with a slow malloc(), and you're using SSL
682 * connections with many different settings for these options, and you need to
683 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options:
684 * - Link against a faster malloc implementation.
685 * - Use a separate SSL_CTX for each option set.
686 * - Improve this code.
687 */
688 static void *
689 freelist_extract(SSL_CTX *ctx, int for_read, int sz)
690 {
691 SSL3_BUF_FREELIST *list;
692 SSL3_BUF_FREELIST_ENTRY *ent = NULL;
693 void *result = NULL;
694
695 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
696 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
697 if (list != NULL && sz == (int)list->chunklen)
698 ent = list->head;
699 if (ent != NULL)
700 {
701 list->head = ent->next;
702 result = ent;
703 if (--list->len == 0)
704 list->chunklen = 0;
705 }
706 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
707 if (!result)
708 result = OPENSSL_malloc(sz);
709 return result;
710 }
711
712 static void
713 freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
714 {
715 SSL3_BUF_FREELIST *list;
716 SSL3_BUF_FREELIST_ENTRY *ent;
717
718 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
719 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
720 if (list != NULL &&
721 (sz == list->chunklen || list->chunklen == 0) &&
722 list->len < ctx->freelist_max_len &&
723 sz >= sizeof(*ent))
724 {
725 list->chunklen = sz;
726 ent = mem;
727 ent->next = list->head;
728 list->head = ent;
729 ++list->len;
730 mem = NULL;
731 }
732
733 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
734 if (mem)
735 OPENSSL_free(mem);
736 }
737 #else
738 #define freelist_extract(c,fr,sz) OPENSSL_malloc(sz)
739 #define freelist_insert(c,fr,sz,m) OPENSSL_free(m)
740 #endif
741
742 int ssl3_setup_read_buffer(SSL *s)
743 {
744 unsigned char *p;
745 size_t len,align=0,headerlen;
746
747 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
748 headerlen = DTLS1_RT_HEADER_LENGTH;
749 else
750 headerlen = SSL3_RT_HEADER_LENGTH;
751
752 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
753 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
754 #endif
755
756 if (s->s3->rbuf.buf == NULL)
757 {
758 len = SSL3_RT_MAX_PLAIN_LENGTH
759 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD
760 + headerlen + align;
761 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
762 {
763 s->s3->init_extra = 1;
764 len += SSL3_RT_MAX_EXTRA;
765 }
766 #ifndef OPENSSL_NO_COMP
767 if (!(s->options & SSL_OP_NO_COMPRESSION))
768 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
769 #endif
770 if ((p=freelist_extract(s->ctx, 1, len)) == NULL)
771 goto err;
772 s->s3->rbuf.buf = p;
773 s->s3->rbuf.len = len;
774 }
775
776 s->packet= &(s->s3->rbuf.buf[0]);
777 return 1;
778
779 err:
780 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE);
781 return 0;
782 }
783
784 int ssl3_setup_write_buffer(SSL *s)
785 {
786 unsigned char *p;
787 size_t len,align=0,headerlen;
788
789 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
790 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
791 else
792 headerlen = SSL3_RT_HEADER_LENGTH;
793
794 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
795 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
796 #endif
797
798 if (s->s3->wbuf.buf == NULL)
799 {
800 len = s->max_send_fragment
801 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
802 + headerlen + align;
803 #ifndef OPENSSL_NO_COMP
804 if (!(s->options & SSL_OP_NO_COMPRESSION))
805 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
806 #endif
807 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
808 len += headerlen + align
809 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
810
811 if ((p=freelist_extract(s->ctx, 0, len)) == NULL)
812 goto err;
813 s->s3->wbuf.buf = p;
814 s->s3->wbuf.len = len;
815 }
816
817 return 1;
818
819 err:
820 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE);
821 return 0;
822 }
823
824
825 int ssl3_setup_buffers(SSL *s)
826 {
827 if (!ssl3_setup_read_buffer(s))
828 return 0;
829 if (!ssl3_setup_write_buffer(s))
830 return 0;
831 return 1;
832 }
833
834 int ssl3_release_write_buffer(SSL *s)
835 {
836 if (s->s3->wbuf.buf != NULL)
837 {
838 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf);
839 s->s3->wbuf.buf = NULL;
840 }
841 return 1;
842 }
843
844 int ssl3_release_read_buffer(SSL *s)
845 {
846 if (s->s3->rbuf.buf != NULL)
847 {
848 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf);
849 s->s3->rbuf.buf = NULL;
850 }
851 return 1;
852 }