2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
58 /* ====================================================================
59 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
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
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/)"
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.
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.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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 * ====================================================================
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).
113 #include <openssl/objects.h>
114 #include "ssl_locl.h"
116 const char *tls1_version_str="TLSv1" OPENSSL_VERSION_PTEXT;
118 SSL3_ENC_METHOD TLSv1_enc_data={
121 tls1_setup_key_block,
122 tls1_generate_master_secret,
123 tls1_change_cipher_state,
124 tls1_final_finish_mac,
125 TLS1_FINISH_MAC_LENGTH,
126 tls1_cert_verify_mac,
127 TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE,
128 TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE,
132 long tls1_default_timeout(void)
134 /* 2 hours, the 24 hours mentioned in the TLSv1 spec
135 * is way too long for http, the cache would over fill */
141 if (!ssl3_new(s)) return(0);
142 s->method->ssl_clear(s);
146 void tls1_free(SSL *s)
151 void tls1_clear(SSL *s)
154 s->version=TLS1_VERSION;
158 #ifndef OPENSSL_NO_TLSEXT
159 unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
162 unsigned char *ret = p;
166 if (ret>=limit) return NULL; /* this really never occurs, but ... */
167 if (s->servername_done == 0 && s->tlsext_hostname != NULL)
169 /* Add TLS extension servername to the Client Hello message */
170 unsigned long size_str;
173 if ((lenmax = limit - p - 7) < 0) return NULL;
174 if ((size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax) return NULL;
176 s2n(TLSEXT_TYPE_server_name,ret);
178 *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name;
181 memcpy(ret, s->tlsext_hostname, size_str);
184 #ifndef OPENSSL_NO_EC
185 if (s->tlsext_ecpointformatlist != NULL)
187 /* Add TLS extension ECPointFormats to the ClientHello message */
190 if ((lenmax = limit - p - 5) < 0) return NULL;
191 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
192 if (s->tlsext_ecpointformatlist_length > 255)
194 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
198 s2n(TLSEXT_TYPE_ec_point_formats,ret);
199 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
200 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
201 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
202 ret+=s->tlsext_ecpointformatlist_length;
204 #endif /* OPENSSL_NO_EC */
206 if ((extdatalen = ret-p-2)== 0)
213 unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
216 unsigned char *ret = p;
219 if (ret>=limit) return NULL; /* this really never occurs, but ... */
221 if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
223 if (limit - p - 4 < 0) return NULL;
225 s2n(TLSEXT_TYPE_server_name,ret);
228 #ifndef OPENSSL_NO_EC
229 if (s->tlsext_ecpointformatlist != NULL)
231 /* Add TLS extension ECPointFormats to the ServerHello message */
234 if ((lenmax = limit - p - 5) < 0) return NULL;
235 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
236 if (s->tlsext_ecpointformatlist_length > 255)
238 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
242 s2n(TLSEXT_TYPE_ec_point_formats,ret);
243 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
244 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
245 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
246 ret+=s->tlsext_ecpointformatlist_length;
248 #endif /* OPENSSL_NO_EC */
250 if ((extdatalen = ret-p-2)== 0)
257 int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
262 unsigned char *data = *p;
264 fprintf(stderr,"ssl_parse_clienthello_tlsext %s\n",s->session->tlsext_hostname?s->session->tlsext_hostname:"NULL");
266 s->servername_done = 0;
272 if (data > (d+n-len))
275 while (data <= (d+n-4))
280 if (data+size > (d+n))
283 /* The servername extension is treated as follows:
285 - Only the hostname type is supported with a maximum length of 255.
286 - The servername is rejected if too long or if it contains zeros,
287 in which case an fatal alert is generated.
288 - The servername field is maintained together with the session cache.
289 - When a session is resumed, the servername call back invoked in order
290 to allow the application to position itself to the right context.
291 - The servername is acknowledged if it is new for a session or when
292 it is identical to a previously used for the same session.
293 Applications can control the behaviour. They can at any time
294 set a 'desirable' servername for a new SSL object. This can be the
295 case for example with HTTPS when a Host: header field is received and
296 a renegotiation is requested. In this case, a possible servername
297 presented in the new client hello is only acknowledged if it matches
298 the value of the Host: field.
299 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
300 if they provide for changing an explicit servername context for the session,
301 i.e. when the session has been established with a servername extension.
302 - On session reconnect, the servername extension may be absent.
306 if (type == TLSEXT_TYPE_server_name)
308 unsigned char *sdata = data;
314 servname_type = *(sdata++);
318 *al = SSL_AD_DECODE_ERROR;
322 switch (servname_type)
324 case TLSEXT_NAMETYPE_host_name:
325 if (s->session->tlsext_hostname == NULL)
327 if (len > TLSEXT_MAXLEN_host_name ||
328 ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL))
330 *al = TLS1_AD_UNRECOGNIZED_NAME;
333 memcpy(s->session->tlsext_hostname, sdata, len);
334 s->session->tlsext_hostname[len]='\0';
335 if (strlen(s->session->tlsext_hostname) != len) {
336 OPENSSL_free(s->session->tlsext_hostname);
337 *al = TLS1_AD_UNRECOGNIZED_NAME;
340 s->servername_done = 1;
343 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_hostname %s\n",s->session->tlsext_hostname);
347 s->servername_done = strlen(s->session->tlsext_hostname) == len
348 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
359 #ifndef OPENSSL_NO_EC
360 else if (type == TLSEXT_TYPE_ec_point_formats)
362 unsigned char *sdata = data;
363 int ecpointformatlist_length = *(sdata++);
365 if (ecpointformatlist_length != size - 1)
367 *al = TLS1_AD_DECODE_ERROR;
370 s->session->tlsext_ecpointformatlist_length = 0;
371 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
372 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
374 *al = TLS1_AD_INTERNAL_ERROR;
377 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
378 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
380 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
381 sdata = s->session->tlsext_ecpointformatlist;
382 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
383 fprintf(stderr,"%i ",*(sdata++));
384 fprintf(stderr,"\n");
387 #endif /* OPENSSL_NO_EC */
395 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
400 unsigned char *data = *p;
402 int tlsext_servername = 0;
403 #ifndef OPENSSL_NO_EC
404 int tlsext_ecpointformats = 0;
405 #endif /* OPENSSL_NO_EC */
412 while(data <= (d+n-4))
417 if (data+size > (d+n))
420 if (type == TLSEXT_TYPE_server_name)
422 if (s->tlsext_hostname == NULL || size > 0)
424 *al = TLS1_AD_UNRECOGNIZED_NAME;
427 tlsext_servername = 1;
430 #ifndef OPENSSL_NO_EC
431 else if (type == TLSEXT_TYPE_ec_point_formats)
433 unsigned char *sdata = data;
434 int ecpointformatlist_length = *(sdata++);
436 if (ecpointformatlist_length != size - 1)
438 *al = TLS1_AD_DECODE_ERROR;
441 s->session->tlsext_ecpointformatlist_length = 0;
442 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
443 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
445 *al = TLS1_AD_INTERNAL_ERROR;
448 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
449 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
451 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
452 sdata = s->session->tlsext_ecpointformatlist;
453 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
454 fprintf(stderr,"%i ",*(sdata++));
455 fprintf(stderr,"\n");
458 #endif /* OPENSSL_NO_EC */
464 *al = SSL_AD_DECODE_ERROR;
468 if (!s->hit && tlsext_servername == 1)
470 if (s->tlsext_hostname)
472 if (s->session->tlsext_hostname == NULL)
474 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
475 if (!s->session->tlsext_hostname)
477 *al = SSL_AD_UNRECOGNIZED_NAME;
483 *al = SSL_AD_DECODE_ERROR;
489 #ifndef OPENSSL_NO_EC
490 if (!s->hit && tlsext_ecpointformats == 1)
492 if (s->tlsext_ecpointformatlist)
494 if (s->session->tlsext_ecpointformatlist == NULL)
496 s->session->tlsext_ecpointformatlist_length = s->tlsext_ecpointformatlist_length;
497 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
498 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(s->tlsext_ecpointformatlist_length)) == NULL)
500 *al = TLS1_AD_INTERNAL_ERROR;
503 memcpy(s->session->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
507 *al = SSL_AD_DECODE_ERROR;
512 #endif /* OPENSSL_NO_EC */
518 int ssl_prepare_clienthello_tlsext(SSL *s)
520 #ifndef OPENSSL_NO_EC
521 /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats we
527 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
528 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
530 algs = (sk_SSL_CIPHER_value(cipher_stack, i))->algorithms;
531 if ((algs & SSL_kECDH) || (algs & SSL_kECDHE) || (algs & SSL_aECDSA))
538 using_ecc = using_ecc && (s->version == TLS1_VERSION);
541 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
542 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
544 SSLerr(SSL_F_TLS1_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
547 s->tlsext_ecpointformatlist_length = 3;
548 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
549 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
550 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
552 #endif /* OPENSSL_NO_EC */
556 int ssl_prepare_serverhello_tlsext(SSL *s)
558 #ifndef OPENSSL_NO_EC
559 /* If we are server and using an ECC cipher suite, send the point formats we support
560 * if the client sent us an ECPointsFormat extension.
562 int algs = s->s3->tmp.new_cipher->algorithms;
563 int using_ecc = (algs & SSL_kECDH) || (algs & SSL_kECDHE) || (algs & SSL_aECDSA);
564 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
568 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
569 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
571 SSLerr(SSL_F_TLS1_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
574 s->tlsext_ecpointformatlist_length = 3;
575 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
576 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
577 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
579 #endif /* OPENSSL_NO_EC */
583 int ssl_check_clienthello_tlsext(SSL *s)
585 int ret=SSL_TLSEXT_ERR_NOACK;
586 int al = SSL_AD_UNRECOGNIZED_NAME;
588 #ifndef OPENSSL_NO_EC
589 /* If we are server and using an elliptic curve cyrptography cipher suite, then we don't
590 * need to check EC point formats since all clients must support uncompressed and it's the
591 * only thing we support; we just need to copy the data in. We probably ought to check it
592 * for validity, but we never use it.
596 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
597 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
598 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
599 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
602 case SSL_TLSEXT_ERR_ALERT_FATAL:
603 ssl3_send_alert(s,SSL3_AL_FATAL,al);
606 case SSL_TLSEXT_ERR_ALERT_WARNING:
607 ssl3_send_alert(s,SSL3_AL_WARNING,al);
610 case SSL_TLSEXT_ERR_NOACK:
611 s->servername_done=0;
617 int ssl_check_serverhello_tlsext(SSL *s)
619 int ret=SSL_TLSEXT_ERR_NOACK;
620 int al = SSL_AD_UNRECOGNIZED_NAME;
622 #ifndef OPENSSL_NO_EC
623 /* If we are client and using an elliptic curve cryptography cipher suite, then server
624 * must return a an EC point formats lists containing uncompressed.
626 int algs = s->s3->tmp.new_cipher->algorithms;
627 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
628 ((algs & SSL_kECDH) || (algs & SSL_kECDHE) || (algs & SSL_aECDSA)))
630 /* we are using an ECC cipher */
633 int found_uncompressed = 0;
634 if ((s->session->tlsext_ecpointformatlist == NULL) || (s->session->tlsext_ecpointformatlist_length == 0))
636 SSLerr(SSL_F_TLS1_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
639 list = s->session->tlsext_ecpointformatlist;
640 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
642 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
644 found_uncompressed = 1;
648 if (!found_uncompressed)
650 SSLerr(SSL_F_TLS1_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
654 ret = SSL_TLSEXT_ERR_OK;
655 #endif /* OPENSSL_NO_EC */
657 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
658 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
659 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
660 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
663 case SSL_TLSEXT_ERR_ALERT_FATAL:
664 ssl3_send_alert(s,SSL3_AL_FATAL,al);
667 case SSL_TLSEXT_ERR_ALERT_WARNING:
668 ssl3_send_alert(s,SSL3_AL_WARNING,al);
671 case SSL_TLSEXT_ERR_NOACK:
672 s->servername_done=0;