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) */
ssl3_do_write(SSL * s,int type)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
ssl3_send_finished(SSL * s,int a,int b,const char * sender,int slen)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 s->s3->tmp.finish_md_len = i;
165 memcpy(p, s->s3->tmp.finish_md, i);
166 p+=i;
167 l=i;
168
169 /* Copy the finished so we can use it for
170 renegotiation checks */
171 if(s->type == SSL_ST_CONNECT)
172 {
173 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
174 memcpy(s->s3->previous_client_finished,
175 s->s3->tmp.finish_md, i);
176 s->s3->previous_client_finished_len=i;
177 }
178 else
179 {
180 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
181 memcpy(s->s3->previous_server_finished,
182 s->s3->tmp.finish_md, i);
183 s->s3->previous_server_finished_len=i;
184 }
185
186 #ifdef OPENSSL_SYS_WIN16
187 /* MSVC 1.5 does not clear the top bytes of the word unless
188 * I do this.
189 */
190 l&=0xffff;
191 #endif
192
193 *(d++)=SSL3_MT_FINISHED;
194 l2n3(l,d);
195 s->init_num=(int)l+4;
196 s->init_off=0;
197
198 s->state=b;
199 }
200
201 /* SSL3_ST_SEND_xxxxxx_HELLO_B */
202 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
203 }
204
ssl3_get_finished(SSL * s,int a,int b)205 int ssl3_get_finished(SSL *s, int a, int b)
206 {
207 int al,i,ok;
208 long n;
209 unsigned char *p;
210
211 /* the mac has already been generated when we received the
212 * change cipher spec message and is in s->s3->tmp.peer_finish_md
213 */
214
215 n=s->method->ssl_get_message(s,
216 a,
217 b,
218 SSL3_MT_FINISHED,
219 64, /* should actually be 36+4 :-) */
220 &ok);
221
222 if (!ok) return((int)n);
223
224 /* If this occurs, we have missed a message */
225 if (!s->s3->change_cipher_spec)
226 {
227 al=SSL_AD_UNEXPECTED_MESSAGE;
228 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
229 goto f_err;
230 }
231 s->s3->change_cipher_spec=0;
232
233 p = (unsigned char *)s->init_msg;
234 i = s->s3->tmp.peer_finish_md_len;
235
236 if (i != n)
237 {
238 al=SSL_AD_DECODE_ERROR;
239 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
240 goto f_err;
241 }
242
243 if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
244 {
245 al=SSL_AD_DECRYPT_ERROR;
246 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
247 goto f_err;
248 }
249
250 /* Copy the finished so we can use it for
251 renegotiation checks */
252 if(s->type == SSL_ST_ACCEPT)
253 {
254 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
255 memcpy(s->s3->previous_client_finished,
256 s->s3->tmp.peer_finish_md, i);
257 s->s3->previous_client_finished_len=i;
258 }
259 else
260 {
261 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
262 memcpy(s->s3->previous_server_finished,
263 s->s3->tmp.peer_finish_md, i);
264 s->s3->previous_server_finished_len=i;
265 }
266
267 return(1);
268 f_err:
269 ssl3_send_alert(s,SSL3_AL_FATAL,al);
270 return(0);
271 }
272
273 /* for these 2 messages, we need to
274 * ssl->enc_read_ctx re-init
275 * ssl->s3->read_sequence zero
276 * ssl->s3->read_mac_secret re-init
277 * ssl->session->read_sym_enc assign
278 * ssl->session->read_compression assign
279 * ssl->session->read_hash assign
280 */
ssl3_send_change_cipher_spec(SSL * s,int a,int b)281 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
282 {
283 unsigned char *p;
284
285 if (s->state == a)
286 {
287 p=(unsigned char *)s->init_buf->data;
288 *p=SSL3_MT_CCS;
289 s->init_num=1;
290 s->init_off=0;
291
292 s->state=b;
293 }
294
295 /* SSL3_ST_CW_CHANGE_B */
296 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
297 }
298
ssl3_add_cert_to_buf(BUF_MEM * buf,unsigned long * l,X509 * x)299 static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
300 {
301 int n;
302 unsigned char *p;
303
304 n=i2d_X509(x,NULL);
305 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
306 {
307 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
308 return(-1);
309 }
310 p=(unsigned char *)&(buf->data[*l]);
311 l2n3(n,p);
312 i2d_X509(x,&p);
313 *l+=n+3;
314
315 return(0);
316 }
317
ssl3_output_cert_chain(SSL * s,X509 * x)318 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
319 {
320 unsigned char *p;
321 int i;
322 unsigned long l=7;
323 BUF_MEM *buf;
324 int no_chain;
325 STACK_OF(X509) *cert_chain;
326
327 cert_chain = SSL_get_certificate_chain(s, x);
328
329 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs || cert_chain)
330 no_chain = 1;
331 else
332 no_chain = 0;
333
334 /* TLSv1 sends a chain with nothing in it, instead of an alert */
335 buf=s->init_buf;
336 if (!BUF_MEM_grow_clean(buf,10))
337 {
338 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
339 return(0);
340 }
341 if (x != NULL)
342 {
343 if (no_chain)
344 {
345 if (ssl3_add_cert_to_buf(buf, &l, x))
346 return(0);
347 }
348 else
349 {
350 X509_STORE_CTX xs_ctx;
351
352 if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
353 {
354 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
355 return(0);
356 }
357 X509_verify_cert(&xs_ctx);
358 /* Don't leave errors in the queue */
359 ERR_clear_error();
360 for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
361 {
362 x = sk_X509_value(xs_ctx.chain, i);
363
364 if (ssl3_add_cert_to_buf(buf, &l, x))
365 {
366 X509_STORE_CTX_cleanup(&xs_ctx);
367 return 0;
368 }
369 }
370 X509_STORE_CTX_cleanup(&xs_ctx);
371 }
372 }
373 /* Thawte special :-) */
374 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
375 {
376 x=sk_X509_value(s->ctx->extra_certs,i);
377 if (ssl3_add_cert_to_buf(buf, &l, x))
378 return(0);
379 }
380
381 for (i=0; i<sk_X509_num(cert_chain); i++)
382 if (ssl3_add_cert_to_buf(buf, &l, sk_X509_value(cert_chain,i)))
383 return(0);
384
385 l-=7;
386 p=(unsigned char *)&(buf->data[4]);
387 l2n3(l,p);
388 l+=3;
389 p=(unsigned char *)&(buf->data[0]);
390 *(p++)=SSL3_MT_CERTIFICATE;
391 l2n3(l,p);
392 l+=4;
393 return(l);
394 }
395
396 /* Obtain handshake message of message type 'mt' (any if mt == -1),
397 * maximum acceptable body length 'max'.
398 * The first four bytes (msg_type and length) are read in state 'st1',
399 * the body is read in state 'stn'.
400 */
ssl3_get_message(SSL * s,int st1,int stn,int mt,long max,int * ok)401 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
402 {
403 unsigned char *p;
404 unsigned long l;
405 long n;
406 int i,al;
407
408 if (s->s3->tmp.reuse_message)
409 {
410 s->s3->tmp.reuse_message=0;
411 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
412 {
413 al=SSL_AD_UNEXPECTED_MESSAGE;
414 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
415 goto f_err;
416 }
417 *ok=1;
418 s->init_msg = s->init_buf->data + 4;
419 s->init_num = (int)s->s3->tmp.message_size;
420 return s->init_num;
421 }
422
423 p=(unsigned char *)s->init_buf->data;
424
425 if (s->state == st1) /* s->init_num < 4 */
426 {
427 int skip_message;
428
429 do
430 {
431 while (s->init_num < 4)
432 {
433 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
434 &p[s->init_num],4 - s->init_num, 0);
435 if (i <= 0)
436 {
437 s->rwstate=SSL_READING;
438 *ok = 0;
439 return i;
440 }
441 s->init_num+=i;
442 }
443
444 skip_message = 0;
445 if (!s->server)
446 if (p[0] == SSL3_MT_HELLO_REQUEST)
447 /* The server may always send 'Hello Request' messages --
448 * we are doing a handshake anyway now, so ignore them
449 * if their format is correct. Does not count for
450 * 'Finished' MAC. */
451 if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
452 {
453 s->init_num = 0;
454 skip_message = 1;
455
456 if (s->msg_callback)
457 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
458 }
459 }
460 while (skip_message);
461
462 /* s->init_num == 4 */
463
464 if ((mt >= 0) && (*p != mt))
465 {
466 al=SSL_AD_UNEXPECTED_MESSAGE;
467 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
468 goto f_err;
469 }
470 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
471 (st1 == SSL3_ST_SR_CERT_A) &&
472 (stn == SSL3_ST_SR_CERT_B))
473 {
474 /* At this point we have got an MS SGC second client
475 * hello (maybe we should always allow the client to
476 * start a new handshake?). We need to restart the mac.
477 * Don't increment {num,total}_renegotiations because
478 * we have not completed the handshake. */
479 ssl3_init_finished_mac(s);
480 }
481
482 s->s3->tmp.message_type= *(p++);
483
484 n2l3(p,l);
485 if (l > (unsigned long)max)
486 {
487 al=SSL_AD_ILLEGAL_PARAMETER;
488 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
489 goto f_err;
490 }
491 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
492 {
493 al=SSL_AD_ILLEGAL_PARAMETER;
494 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
495 goto f_err;
496 }
497 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
498 {
499 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
500 goto err;
501 }
502 s->s3->tmp.message_size=l;
503 s->state=stn;
504
505 s->init_msg = s->init_buf->data + 4;
506 s->init_num = 0;
507 }
508
509 /* next state (stn) */
510 p = s->init_msg;
511 n = s->s3->tmp.message_size - s->init_num;
512 while (n > 0)
513 {
514 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
515 if (i <= 0)
516 {
517 s->rwstate=SSL_READING;
518 *ok = 0;
519 return i;
520 }
521 s->init_num += i;
522 n -= i;
523 }
524 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
525 if (s->msg_callback)
526 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
527 *ok=1;
528 return s->init_num;
529 f_err:
530 ssl3_send_alert(s,SSL3_AL_FATAL,al);
531 err:
532 *ok=0;
533 return(-1);
534 }
535
ssl_cert_type(X509 * x,EVP_PKEY * pkey)536 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
537 {
538 EVP_PKEY *pk;
539 int ret= -1,i;
540
541 if (pkey == NULL)
542 pk=X509_get_pubkey(x);
543 else
544 pk=pkey;
545 if (pk == NULL) goto err;
546
547 i=pk->type;
548 if (i == EVP_PKEY_RSA)
549 {
550 ret=SSL_PKEY_RSA_ENC;
551 }
552 else if (i == EVP_PKEY_DSA)
553 {
554 ret=SSL_PKEY_DSA_SIGN;
555 }
556 #ifndef OPENSSL_NO_EC
557 else if (i == EVP_PKEY_EC)
558 {
559 ret = SSL_PKEY_ECC;
560 }
561 #endif
562 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc)
563 {
564 ret = SSL_PKEY_GOST94;
565 }
566 else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc)
567 {
568 ret = SSL_PKEY_GOST01;
569 }
570 err:
571 if(!pkey) EVP_PKEY_free(pk);
572 return(ret);
573 }
574
ssl_verify_alarm_type(long type)575 int ssl_verify_alarm_type(long type)
576 {
577 int al;
578
579 switch(type)
580 {
581 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
582 case X509_V_ERR_UNABLE_TO_GET_CRL:
583 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
584 al=SSL_AD_UNKNOWN_CA;
585 break;
586 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
587 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
588 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
589 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
590 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
591 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
592 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
593 case X509_V_ERR_CERT_NOT_YET_VALID:
594 case X509_V_ERR_CRL_NOT_YET_VALID:
595 case X509_V_ERR_CERT_UNTRUSTED:
596 case X509_V_ERR_CERT_REJECTED:
597 al=SSL_AD_BAD_CERTIFICATE;
598 break;
599 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
600 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
601 al=SSL_AD_DECRYPT_ERROR;
602 break;
603 case X509_V_ERR_CERT_HAS_EXPIRED:
604 case X509_V_ERR_CRL_HAS_EXPIRED:
605 al=SSL_AD_CERTIFICATE_EXPIRED;
606 break;
607 case X509_V_ERR_CERT_REVOKED:
608 al=SSL_AD_CERTIFICATE_REVOKED;
609 break;
610 case X509_V_ERR_OUT_OF_MEM:
611 al=SSL_AD_INTERNAL_ERROR;
612 break;
613 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
614 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
615 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
616 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
617 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
618 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
619 case X509_V_ERR_INVALID_CA:
620 al=SSL_AD_UNKNOWN_CA;
621 break;
622 case X509_V_ERR_APPLICATION_VERIFICATION:
623 al=SSL_AD_HANDSHAKE_FAILURE;
624 break;
625 case X509_V_ERR_INVALID_PURPOSE:
626 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
627 break;
628 default:
629 al=SSL_AD_CERTIFICATE_UNKNOWN;
630 break;
631 }
632 return(al);
633 }
634
635 #ifndef OPENSSL_NO_BUF_FREELISTS
636 /* On some platforms, malloc() performance is bad enough that you can't just
637 * free() and malloc() buffers all the time, so we need to use freelists from
638 * unused buffers. Currently, each freelist holds memory chunks of only a
639 * given size (list->chunklen); other sized chunks are freed and malloced.
640 * This doesn't help much if you're using many different SSL option settings
641 * with a given context. (The options affecting buffer size are
642 * max_send_fragment, read buffer vs write buffer,
643 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and
644 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every
645 * possible size is not an option, since max_send_fragment can take on many
646 * different values.
647 *
648 * If you are on a platform with a slow malloc(), and you're using SSL
649 * connections with many different settings for these options, and you need to
650 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options:
651 * - Link against a faster malloc implementation.
652 * - Use a separate SSL_CTX for each option set.
653 * - Improve this code.
654 */
655 static void *
freelist_extract(SSL_CTX * ctx,int for_read,int sz)656 freelist_extract(SSL_CTX *ctx, int for_read, int sz)
657 {
658 SSL3_BUF_FREELIST *list;
659 SSL3_BUF_FREELIST_ENTRY *ent = NULL;
660 void *result = NULL;
661
662 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
663 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
664 if (list != NULL && sz == (int)list->chunklen)
665 ent = list->head;
666 if (ent != NULL)
667 {
668 list->head = ent->next;
669 result = ent;
670 if (--list->len == 0)
671 list->chunklen = 0;
672 }
673 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
674 if (!result)
675 result = OPENSSL_malloc(sz);
676 return result;
677 }
678
679 static void
freelist_insert(SSL_CTX * ctx,int for_read,size_t sz,void * mem)680 freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
681 {
682 SSL3_BUF_FREELIST *list;
683 SSL3_BUF_FREELIST_ENTRY *ent;
684
685 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
686 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
687 if (list != NULL &&
688 (sz == list->chunklen || list->chunklen == 0) &&
689 list->len < ctx->freelist_max_len &&
690 sz >= sizeof(*ent))
691 {
692 list->chunklen = sz;
693 ent = mem;
694 ent->next = list->head;
695 list->head = ent;
696 ++list->len;
697 mem = NULL;
698 }
699
700 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
701 if (mem)
702 OPENSSL_free(mem);
703 }
704 #else
705 #define freelist_extract(c,fr,sz) OPENSSL_malloc(sz)
706 #define freelist_insert(c,fr,sz,m) OPENSSL_free(m)
707 #endif
708
ssl3_setup_read_buffer(SSL * s)709 int ssl3_setup_read_buffer(SSL *s)
710 {
711 unsigned char *p;
712 size_t len,align=0,headerlen;
713
714 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
715 headerlen = DTLS1_RT_HEADER_LENGTH;
716 else
717 headerlen = SSL3_RT_HEADER_LENGTH;
718
719 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
720 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
721 #endif
722
723 if (s->s3->rbuf.buf == NULL)
724 {
725 if (SSL_get_mode(s) & SSL_MODE_SMALL_BUFFERS)
726 {
727 len = SSL3_RT_DEFAULT_PACKET_SIZE;
728 }
729 else
730 {
731 len = SSL3_RT_MAX_PLAIN_LENGTH
732 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD
733 + headerlen + align;
734 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
735 {
736 s->s3->init_extra = 1;
737 len += SSL3_RT_MAX_EXTRA;
738 }
739 }
740 #ifndef OPENSSL_NO_COMP
741 if (!(s->options & SSL_OP_NO_COMPRESSION))
742 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
743 #endif
744 if ((p=freelist_extract(s->ctx, 1, len)) == NULL)
745 goto err;
746 s->s3->rbuf.buf = p;
747 s->s3->rbuf.len = len;
748 }
749
750 s->packet= &(s->s3->rbuf.buf[0]);
751 return 1;
752
753 err:
754 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE);
755 return 0;
756 }
757
ssl3_setup_write_buffer(SSL * s)758 int ssl3_setup_write_buffer(SSL *s)
759 {
760 unsigned char *p;
761 size_t len,align=0,headerlen;
762
763 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
764 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
765 else
766 headerlen = SSL3_RT_HEADER_LENGTH;
767
768 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
769 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
770 #endif
771
772 if (s->s3->wbuf.buf == NULL)
773 {
774 if (SSL_get_mode(s) & SSL_MODE_SMALL_BUFFERS)
775 {
776 len = SSL3_RT_DEFAULT_PACKET_SIZE;
777 }
778 else
779 {
780 len = s->max_send_fragment;
781 }
782 len += 0
783 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
784 + headerlen + align;
785 #ifndef OPENSSL_NO_COMP
786 if (!(s->options & SSL_OP_NO_COMPRESSION))
787 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
788 #endif
789 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
790 len += headerlen + align
791 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
792 if ((p=freelist_extract(s->ctx, 0, len)) == NULL)
793 goto err;
794 s->s3->wbuf.buf = p;
795 s->s3->wbuf.len = len;
796 }
797
798 return 1;
799
800 err:
801 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE);
802 return 0;
803 }
804
805
ssl3_setup_buffers(SSL * s)806 int ssl3_setup_buffers(SSL *s)
807 {
808 if (!ssl3_setup_read_buffer(s))
809 return 0;
810 if (!ssl3_setup_write_buffer(s))
811 return 0;
812 return 1;
813 }
814
ssl3_release_write_buffer(SSL * s)815 int ssl3_release_write_buffer(SSL *s)
816 {
817 if (s->s3->wbuf.buf != NULL)
818 {
819 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf);
820 s->s3->wbuf.buf = NULL;
821 }
822 return 1;
823 }
824
ssl3_release_read_buffer(SSL * s)825 int ssl3_release_read_buffer(SSL *s)
826 {
827 if (s->s3->rbuf.buf != NULL)
828 {
829 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf);
830 s->s3->rbuf.buf = NULL;
831 }
832 return 1;
833 }
834