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
205 #ifndef OPENSSL_NO_NEXTPROTONEG
206 /* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen to far. */
ssl3_take_mac(SSL * s)207 static void ssl3_take_mac(SSL *s)
208 {
209 const char *sender;
210 int slen;
211
212 if (s->state & SSL_ST_CONNECT)
213 {
214 sender=s->method->ssl3_enc->server_finished_label;
215 slen=s->method->ssl3_enc->server_finished_label_len;
216 }
217 else
218 {
219 sender=s->method->ssl3_enc->client_finished_label;
220 slen=s->method->ssl3_enc->client_finished_label_len;
221 }
222
223 s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
224 sender,slen,s->s3->tmp.peer_finish_md);
225 }
226 #endif
227
ssl3_get_finished(SSL * s,int a,int b)228 int ssl3_get_finished(SSL *s, int a, int b)
229 {
230 int al,i,ok;
231 long n;
232 unsigned char *p;
233
234 #ifdef OPENSSL_NO_NEXTPROTONEG
235 /* the mac has already been generated when we received the
236 * change cipher spec message and is in s->s3->tmp.peer_finish_md
237 */
238 #endif
239
240 n=s->method->ssl_get_message(s,
241 a,
242 b,
243 SSL3_MT_FINISHED,
244 64, /* should actually be 36+4 :-) */
245 &ok);
246
247 if (!ok) return((int)n);
248
249 /* If this occurs, we have missed a message */
250 if (!s->s3->change_cipher_spec)
251 {
252 al=SSL_AD_UNEXPECTED_MESSAGE;
253 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
254 goto f_err;
255 }
256 s->s3->change_cipher_spec=0;
257
258 p = (unsigned char *)s->init_msg;
259 i = s->s3->tmp.peer_finish_md_len;
260
261 if (i != n)
262 {
263 al=SSL_AD_DECODE_ERROR;
264 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
265 goto f_err;
266 }
267
268 if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
269 {
270 al=SSL_AD_DECRYPT_ERROR;
271 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
272 goto f_err;
273 }
274
275 /* Copy the finished so we can use it for
276 renegotiation checks */
277 if(s->type == SSL_ST_ACCEPT)
278 {
279 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
280 memcpy(s->s3->previous_client_finished,
281 s->s3->tmp.peer_finish_md, i);
282 s->s3->previous_client_finished_len=i;
283 }
284 else
285 {
286 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
287 memcpy(s->s3->previous_server_finished,
288 s->s3->tmp.peer_finish_md, i);
289 s->s3->previous_server_finished_len=i;
290 }
291
292 return(1);
293 f_err:
294 ssl3_send_alert(s,SSL3_AL_FATAL,al);
295 return(0);
296 }
297
298 /* for these 2 messages, we need to
299 * ssl->enc_read_ctx re-init
300 * ssl->s3->read_sequence zero
301 * ssl->s3->read_mac_secret re-init
302 * ssl->session->read_sym_enc assign
303 * ssl->session->read_compression assign
304 * ssl->session->read_hash assign
305 */
ssl3_send_change_cipher_spec(SSL * s,int a,int b)306 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
307 {
308 unsigned char *p;
309
310 if (s->state == a)
311 {
312 p=(unsigned char *)s->init_buf->data;
313 *p=SSL3_MT_CCS;
314 s->init_num=1;
315 s->init_off=0;
316
317 s->state=b;
318 }
319
320 /* SSL3_ST_CW_CHANGE_B */
321 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
322 }
323
ssl3_add_cert_to_buf(BUF_MEM * buf,unsigned long * l,X509 * x)324 static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
325 {
326 int n;
327 unsigned char *p;
328
329 n=i2d_X509(x,NULL);
330 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
331 {
332 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
333 return(-1);
334 }
335 p=(unsigned char *)&(buf->data[*l]);
336 l2n3(n,p);
337 i2d_X509(x,&p);
338 *l+=n+3;
339
340 return(0);
341 }
342
ssl3_output_cert_chain(SSL * s,X509 * x)343 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
344 {
345 unsigned char *p;
346 int i;
347 unsigned long l=7;
348 BUF_MEM *buf;
349 int no_chain;
350 STACK_OF(X509) *cert_chain;
351
352 cert_chain = SSL_get_certificate_chain(s, x);
353
354 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs || cert_chain)
355 no_chain = 1;
356 else
357 no_chain = 0;
358
359 /* TLSv1 sends a chain with nothing in it, instead of an alert */
360 buf=s->init_buf;
361 if (!BUF_MEM_grow_clean(buf,10))
362 {
363 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
364 return(0);
365 }
366 if (x != NULL)
367 {
368 if (no_chain)
369 {
370 if (ssl3_add_cert_to_buf(buf, &l, x))
371 return(0);
372 }
373 else
374 {
375 X509_STORE_CTX xs_ctx;
376
377 if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
378 {
379 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
380 return(0);
381 }
382 X509_verify_cert(&xs_ctx);
383 /* Don't leave errors in the queue */
384 ERR_clear_error();
385 for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
386 {
387 x = sk_X509_value(xs_ctx.chain, i);
388
389 if (ssl3_add_cert_to_buf(buf, &l, x))
390 {
391 X509_STORE_CTX_cleanup(&xs_ctx);
392 return 0;
393 }
394 }
395 X509_STORE_CTX_cleanup(&xs_ctx);
396 }
397 }
398 /* Thawte special :-) */
399 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
400 {
401 x=sk_X509_value(s->ctx->extra_certs,i);
402 if (ssl3_add_cert_to_buf(buf, &l, x))
403 return(0);
404 }
405
406 for (i=0; i<sk_X509_num(cert_chain); i++)
407 if (ssl3_add_cert_to_buf(buf, &l, sk_X509_value(cert_chain,i)))
408 return(0);
409
410 l-=7;
411 p=(unsigned char *)&(buf->data[4]);
412 l2n3(l,p);
413 l+=3;
414 p=(unsigned char *)&(buf->data[0]);
415 *(p++)=SSL3_MT_CERTIFICATE;
416 l2n3(l,p);
417 l+=4;
418 return(l);
419 }
420
421 /* Obtain handshake message of message type 'mt' (any if mt == -1),
422 * maximum acceptable body length 'max'.
423 * The first four bytes (msg_type and length) are read in state 'st1',
424 * the body is read in state 'stn'.
425 */
ssl3_get_message(SSL * s,int st1,int stn,int mt,long max,int * ok)426 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
427 {
428 unsigned char *p;
429 unsigned long l;
430 long n;
431 int i,al;
432
433 if (s->s3->tmp.reuse_message)
434 {
435 s->s3->tmp.reuse_message=0;
436 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
437 {
438 al=SSL_AD_UNEXPECTED_MESSAGE;
439 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
440 goto f_err;
441 }
442 *ok=1;
443 s->init_msg = s->init_buf->data + 4;
444 s->init_num = (int)s->s3->tmp.message_size;
445 return s->init_num;
446 }
447
448 p=(unsigned char *)s->init_buf->data;
449
450 if (s->state == st1) /* s->init_num < 4 */
451 {
452 int skip_message;
453
454 do
455 {
456 while (s->init_num < 4)
457 {
458 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
459 &p[s->init_num],4 - s->init_num, 0);
460 if (i <= 0)
461 {
462 s->rwstate=SSL_READING;
463 *ok = 0;
464 return i;
465 }
466 s->init_num+=i;
467 }
468
469 skip_message = 0;
470 if (!s->server)
471 if (p[0] == SSL3_MT_HELLO_REQUEST)
472 /* The server may always send 'Hello Request' messages --
473 * we are doing a handshake anyway now, so ignore them
474 * if their format is correct. Does not count for
475 * 'Finished' MAC. */
476 if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
477 {
478 s->init_num = 0;
479 skip_message = 1;
480
481 if (s->msg_callback)
482 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
483 }
484 }
485 while (skip_message);
486
487 /* s->init_num == 4 */
488
489 if ((mt >= 0) && (*p != mt))
490 {
491 al=SSL_AD_UNEXPECTED_MESSAGE;
492 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
493 goto f_err;
494 }
495 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
496 (st1 == SSL3_ST_SR_CERT_A) &&
497 (stn == SSL3_ST_SR_CERT_B))
498 {
499 /* At this point we have got an MS SGC second client
500 * hello (maybe we should always allow the client to
501 * start a new handshake?). We need to restart the mac.
502 * Don't increment {num,total}_renegotiations because
503 * we have not completed the handshake. */
504 ssl3_init_finished_mac(s);
505 }
506
507 s->s3->tmp.message_type= *(p++);
508
509 n2l3(p,l);
510 if (l > (unsigned long)max)
511 {
512 al=SSL_AD_ILLEGAL_PARAMETER;
513 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
514 goto f_err;
515 }
516 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
517 {
518 al=SSL_AD_ILLEGAL_PARAMETER;
519 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
520 goto f_err;
521 }
522 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
523 {
524 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
525 goto err;
526 }
527 s->s3->tmp.message_size=l;
528 s->state=stn;
529
530 s->init_msg = s->init_buf->data + 4;
531 s->init_num = 0;
532 }
533
534 /* next state (stn) */
535 p = s->init_msg;
536 n = s->s3->tmp.message_size - s->init_num;
537 while (n > 0)
538 {
539 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
540 if (i <= 0)
541 {
542 s->rwstate=SSL_READING;
543 *ok = 0;
544 return i;
545 }
546 s->init_num += i;
547 n -= i;
548 }
549
550 #ifndef OPENSSL_NO_NEXTPROTONEG
551 /* If receiving Finished, record MAC of prior handshake messages for
552 * Finished verification. */
553 if (*s->init_buf->data == SSL3_MT_FINISHED)
554 ssl3_take_mac(s);
555 #endif
556
557 /* Feed this message into MAC computation. */
558 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
559 if (s->msg_callback)
560 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
561 *ok=1;
562 return s->init_num;
563 f_err:
564 ssl3_send_alert(s,SSL3_AL_FATAL,al);
565 err:
566 *ok=0;
567 return(-1);
568 }
569
ssl_cert_type(X509 * x,EVP_PKEY * pkey)570 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
571 {
572 EVP_PKEY *pk;
573 int ret= -1,i;
574
575 if (pkey == NULL)
576 pk=X509_get_pubkey(x);
577 else
578 pk=pkey;
579 if (pk == NULL) goto err;
580
581 i=pk->type;
582 if (i == EVP_PKEY_RSA)
583 {
584 ret=SSL_PKEY_RSA_ENC;
585 }
586 else if (i == EVP_PKEY_DSA)
587 {
588 ret=SSL_PKEY_DSA_SIGN;
589 }
590 #ifndef OPENSSL_NO_EC
591 else if (i == EVP_PKEY_EC)
592 {
593 ret = SSL_PKEY_ECC;
594 }
595 #endif
596 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc)
597 {
598 ret = SSL_PKEY_GOST94;
599 }
600 else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc)
601 {
602 ret = SSL_PKEY_GOST01;
603 }
604 err:
605 if(!pkey) EVP_PKEY_free(pk);
606 return(ret);
607 }
608
ssl_verify_alarm_type(long type)609 int ssl_verify_alarm_type(long type)
610 {
611 int al;
612
613 switch(type)
614 {
615 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
616 case X509_V_ERR_UNABLE_TO_GET_CRL:
617 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
618 al=SSL_AD_UNKNOWN_CA;
619 break;
620 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
621 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
622 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
623 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
624 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
625 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
626 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
627 case X509_V_ERR_CERT_NOT_YET_VALID:
628 case X509_V_ERR_CRL_NOT_YET_VALID:
629 case X509_V_ERR_CERT_UNTRUSTED:
630 case X509_V_ERR_CERT_REJECTED:
631 al=SSL_AD_BAD_CERTIFICATE;
632 break;
633 case X509_V_ERR_CERT_SIGNATURE_FAILURE:
634 case X509_V_ERR_CRL_SIGNATURE_FAILURE:
635 al=SSL_AD_DECRYPT_ERROR;
636 break;
637 case X509_V_ERR_CERT_HAS_EXPIRED:
638 case X509_V_ERR_CRL_HAS_EXPIRED:
639 al=SSL_AD_CERTIFICATE_EXPIRED;
640 break;
641 case X509_V_ERR_CERT_REVOKED:
642 al=SSL_AD_CERTIFICATE_REVOKED;
643 break;
644 case X509_V_ERR_OUT_OF_MEM:
645 al=SSL_AD_INTERNAL_ERROR;
646 break;
647 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
648 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
649 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
650 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
651 case X509_V_ERR_CERT_CHAIN_TOO_LONG:
652 case X509_V_ERR_PATH_LENGTH_EXCEEDED:
653 case X509_V_ERR_INVALID_CA:
654 al=SSL_AD_UNKNOWN_CA;
655 break;
656 case X509_V_ERR_APPLICATION_VERIFICATION:
657 al=SSL_AD_HANDSHAKE_FAILURE;
658 break;
659 case X509_V_ERR_INVALID_PURPOSE:
660 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
661 break;
662 default:
663 al=SSL_AD_CERTIFICATE_UNKNOWN;
664 break;
665 }
666 return(al);
667 }
668
669 #ifndef OPENSSL_NO_BUF_FREELISTS
670 /* On some platforms, malloc() performance is bad enough that you can't just
671 * free() and malloc() buffers all the time, so we need to use freelists from
672 * unused buffers. Currently, each freelist holds memory chunks of only a
673 * given size (list->chunklen); other sized chunks are freed and malloced.
674 * This doesn't help much if you're using many different SSL option settings
675 * with a given context. (The options affecting buffer size are
676 * max_send_fragment, read buffer vs write buffer,
677 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and
678 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every
679 * possible size is not an option, since max_send_fragment can take on many
680 * different values.
681 *
682 * If you are on a platform with a slow malloc(), and you're using SSL
683 * connections with many different settings for these options, and you need to
684 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options:
685 * - Link against a faster malloc implementation.
686 * - Use a separate SSL_CTX for each option set.
687 * - Improve this code.
688 */
689 static void *
freelist_extract(SSL_CTX * ctx,int for_read,int sz)690 freelist_extract(SSL_CTX *ctx, int for_read, int sz)
691 {
692 SSL3_BUF_FREELIST *list;
693 SSL3_BUF_FREELIST_ENTRY *ent = NULL;
694 void *result = NULL;
695
696 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
697 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
698 if (list != NULL && sz == (int)list->chunklen)
699 ent = list->head;
700 if (ent != NULL)
701 {
702 list->head = ent->next;
703 result = ent;
704 if (--list->len == 0)
705 list->chunklen = 0;
706 }
707 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
708 if (!result)
709 result = OPENSSL_malloc(sz);
710 return result;
711 }
712
713 static void
freelist_insert(SSL_CTX * ctx,int for_read,size_t sz,void * mem)714 freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem)
715 {
716 SSL3_BUF_FREELIST *list;
717 SSL3_BUF_FREELIST_ENTRY *ent;
718
719 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
720 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist;
721 if (list != NULL &&
722 (sz == list->chunklen || list->chunklen == 0) &&
723 list->len < ctx->freelist_max_len &&
724 sz >= sizeof(*ent))
725 {
726 list->chunklen = sz;
727 ent = mem;
728 ent->next = list->head;
729 list->head = ent;
730 ++list->len;
731 mem = NULL;
732 }
733
734 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
735 if (mem)
736 OPENSSL_free(mem);
737 }
738 #else
739 #define freelist_extract(c,fr,sz) OPENSSL_malloc(sz)
740 #define freelist_insert(c,fr,sz,m) OPENSSL_free(m)
741 #endif
742
ssl3_setup_read_buffer(SSL * s)743 int ssl3_setup_read_buffer(SSL *s)
744 {
745 unsigned char *p;
746 size_t len,align=0,headerlen;
747
748 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
749 headerlen = DTLS1_RT_HEADER_LENGTH;
750 else
751 headerlen = SSL3_RT_HEADER_LENGTH;
752
753 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
754 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
755 #endif
756
757 if (s->s3->rbuf.buf == NULL)
758 {
759 if (SSL_get_mode(s) & SSL_MODE_SMALL_BUFFERS)
760 {
761 len = SSL3_RT_DEFAULT_PACKET_SIZE;
762 }
763 else
764 {
765 len = SSL3_RT_MAX_PLAIN_LENGTH
766 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD
767 + headerlen + align;
768 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
769 {
770 s->s3->init_extra = 1;
771 len += SSL3_RT_MAX_EXTRA;
772 }
773 }
774 #ifndef OPENSSL_NO_COMP
775 if (!(s->options & SSL_OP_NO_COMPRESSION))
776 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
777 #endif
778 if ((p=freelist_extract(s->ctx, 1, len)) == NULL)
779 goto err;
780 s->s3->rbuf.buf = p;
781 s->s3->rbuf.len = len;
782 }
783
784 s->packet= &(s->s3->rbuf.buf[0]);
785 return 1;
786
787 err:
788 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE);
789 return 0;
790 }
791
ssl3_setup_write_buffer(SSL * s)792 int ssl3_setup_write_buffer(SSL *s)
793 {
794 unsigned char *p;
795 size_t len,align=0,headerlen;
796
797 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
798 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
799 else
800 headerlen = SSL3_RT_HEADER_LENGTH;
801
802 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
803 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
804 #endif
805
806 if (s->s3->wbuf.buf == NULL)
807 {
808 if (SSL_get_mode(s) & SSL_MODE_SMALL_BUFFERS)
809 {
810 len = SSL3_RT_DEFAULT_PACKET_SIZE;
811 }
812 else
813 {
814 len = s->max_send_fragment;
815 }
816 len += 0
817 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
818 + headerlen + align;
819 #ifndef OPENSSL_NO_COMP
820 if (!(s->options & SSL_OP_NO_COMPRESSION))
821 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD;
822 #endif
823 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
824 len += headerlen + align
825 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
826 if ((p=freelist_extract(s->ctx, 0, len)) == NULL)
827 goto err;
828 s->s3->wbuf.buf = p;
829 s->s3->wbuf.len = len;
830 }
831
832 return 1;
833
834 err:
835 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE);
836 return 0;
837 }
838
839
ssl3_setup_buffers(SSL * s)840 int ssl3_setup_buffers(SSL *s)
841 {
842 if (!ssl3_setup_read_buffer(s))
843 return 0;
844 if (!ssl3_setup_write_buffer(s))
845 return 0;
846 return 1;
847 }
848
ssl3_release_write_buffer(SSL * s)849 int ssl3_release_write_buffer(SSL *s)
850 {
851 if (s->s3->wbuf.buf != NULL)
852 {
853 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf);
854 s->s3->wbuf.buf = NULL;
855 }
856 return 1;
857 }
858
ssl3_release_read_buffer(SSL * s)859 int ssl3_release_read_buffer(SSL *s)
860 {
861 if (s->s3->rbuf.buf != NULL)
862 {
863 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf);
864 s->s3->rbuf.buf = NULL;
865 }
866 return 1;
867 }
868