1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2  * All rights reserved.
3  *
4  * This package is an SSL implementation written
5  * by Eric Young (eay@cryptsoft.com).
6  * The implementation was written so as to conform with Netscapes SSL.
7  *
8  * This library is free for commercial and non-commercial use as long as
9  * the following conditions are aheared to.  The following conditions
10  * apply to all code found in this distribution, be it the RC4, RSA,
11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
12  * included with this distribution is covered by the same copyright terms
13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14  *
15  * Copyright remains Eric Young's, and as such any Copyright notices in
16  * the code are not to be removed.
17  * If this package is used in a product, Eric Young should be given attribution
18  * as the author of the parts of the library used.
19  * This can be in the form of a textual message at program startup or
20  * in documentation (online or textual) provided with the package.
21  *
22  * Redistribution and use in source and binary forms, with or without
23  * modification, are permitted provided that the following conditions
24  * are met:
25  * 1. Redistributions of source code must retain the copyright
26  *    notice, this list of conditions and the following disclaimer.
27  * 2. Redistributions in binary form must reproduce the above copyright
28  *    notice, this list of conditions and the following disclaimer in the
29  *    documentation and/or other materials provided with the distribution.
30  * 3. All advertising materials mentioning features or use of this software
31  *    must display the following acknowledgement:
32  *    "This product includes cryptographic software written by
33  *     Eric Young (eay@cryptsoft.com)"
34  *    The word 'cryptographic' can be left out if the rouines from the library
35  *    being used are not cryptographic related :-).
36  * 4. If you include any Windows specific code (or a derivative thereof) from
37  *    the apps directory (application code) you must include an acknowledgement:
38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39  *
40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50  * SUCH DAMAGE.
51  *
52  * The licence and distribution terms for any publically available version or
53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
54  * copied and put under another distribution licence
55  * [including the GNU Public Licence.]
56  */
57 /* ====================================================================
58  * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
59  *
60  * Redistribution and use in source and binary forms, with or without
61  * modification, are permitted provided that the following conditions
62  * are met:
63  *
64  * 1. Redistributions of source code must retain the above copyright
65  *    notice, this list of conditions and the following disclaimer.
66  *
67  * 2. Redistributions in binary form must reproduce the above copyright
68  *    notice, this list of conditions and the following disclaimer in
69  *    the documentation and/or other materials provided with the
70  *    distribution.
71  *
72  * 3. All advertising materials mentioning features or use of this
73  *    software must display the following acknowledgment:
74  *    "This product includes software developed by the OpenSSL Project
75  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
76  *
77  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
78  *    endorse or promote products derived from this software without
79  *    prior written permission. For written permission, please contact
80  *    openssl-core@openssl.org.
81  *
82  * 5. Products derived from this software may not be called "OpenSSL"
83  *    nor may "OpenSSL" appear in their names without prior written
84  *    permission of the OpenSSL Project.
85  *
86  * 6. Redistributions of any form whatsoever must retain the following
87  *    acknowledgment:
88  *    "This product includes software developed by the OpenSSL Project
89  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
90  *
91  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
92  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
93  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
94  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
95  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
96  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
97  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
98  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
99  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
100  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
101  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
102  * OF THE POSSIBILITY OF SUCH DAMAGE.
103  * ====================================================================
104  *
105  * This product includes cryptographic software written by Eric Young
106  * (eay@cryptsoft.com).  This product includes software written by Tim
107  * Hudson (tjh@cryptsoft.com).
108  *
109  */
110 /* ====================================================================
111  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
112  *
113  * Portions of the attached software ("Contribution") are developed by
114  * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
115  *
116  * The Contribution is licensed pursuant to the OpenSSL open source
117  * license provided above.
118  *
119  * ECC cipher suite support in OpenSSL originally written by
120  * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
121  *
122  */
123 /* ====================================================================
124  * Copyright 2005 Nokia. All rights reserved.
125  *
126  * The portions of the attached software ("Contribution") is developed by
127  * Nokia Corporation and is licensed pursuant to the OpenSSL open source
128  * license.
129  *
130  * The Contribution, originally written by Mika Kousa and Pasi Eronen of
131  * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
132  * support (see RFC 4279) to OpenSSL.
133  *
134  * No patent licenses or other rights except those expressly stated in
135  * the OpenSSL open source license shall be deemed granted or received
136  * expressly, by implication, estoppel, or otherwise.
137  *
138  * No assurances are provided by Nokia that the Contribution does not
139  * infringe the patent or other intellectual property rights of any third
140  * party or that the license provides you with all the necessary rights
141  * to make use of the Contribution.
142  *
143  * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
144  * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
145  * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
146  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
147  * OTHERWISE. */
148 
149 #include <assert.h>
150 #include <stdio.h>
151 #include <string.h>
152 
153 #include <openssl/buf.h>
154 #include <openssl/dh.h>
155 #include <openssl/err.h>
156 #include <openssl/md5.h>
157 #include <openssl/mem.h>
158 #include <openssl/obj.h>
159 
160 #include "internal.h"
161 
162 
163 const SSL3_ENC_METHOD SSLv3_enc_data = {
164     ssl3_prf,
165     tls1_setup_key_block,
166     tls1_generate_master_secret,
167     tls1_change_cipher_state,
168     ssl3_final_finish_mac,
169     ssl3_cert_verify_mac,
170     SSL3_MD_CLIENT_FINISHED_CONST, 4,
171     SSL3_MD_SERVER_FINISHED_CONST, 4,
172     ssl3_alert_code,
173     tls1_export_keying_material,
174     0,
175 };
176 
ssl3_supports_cipher(const SSL_CIPHER * cipher)177 int ssl3_supports_cipher(const SSL_CIPHER *cipher) {
178   return 1;
179 }
180 
ssl3_set_handshake_header(SSL * s,int htype,unsigned long len)181 int ssl3_set_handshake_header(SSL *s, int htype, unsigned long len) {
182   uint8_t *p = (uint8_t *)s->init_buf->data;
183   *(p++) = htype;
184   l2n3(len, p);
185   s->init_num = (int)len + SSL3_HM_HEADER_LENGTH;
186   s->init_off = 0;
187 
188   /* Add the message to the handshake hash. */
189   return ssl3_finish_mac(s, (uint8_t *)s->init_buf->data, s->init_num);
190 }
191 
ssl3_handshake_write(SSL * s)192 int ssl3_handshake_write(SSL *s) { return ssl3_do_write(s, SSL3_RT_HANDSHAKE); }
193 
ssl3_new(SSL * s)194 int ssl3_new(SSL *s) {
195   SSL3_STATE *s3;
196 
197   s3 = OPENSSL_malloc(sizeof *s3);
198   if (s3 == NULL) {
199     goto err;
200   }
201   memset(s3, 0, sizeof *s3);
202   memset(s3->rrec.seq_num, 0, sizeof(s3->rrec.seq_num));
203 
204   s->s3 = s3;
205 
206   /* Set the version to the highest supported version for TLS. This controls the
207    * initial state of |s->enc_method| and what the API reports as the version
208    * prior to negotiation.
209    *
210    * TODO(davidben): This is fragile and confusing. */
211   s->version = TLS1_2_VERSION;
212   return 1;
213 err:
214   return 0;
215 }
216 
ssl3_free(SSL * s)217 void ssl3_free(SSL *s) {
218   if (s == NULL || s->s3 == NULL) {
219     return;
220   }
221 
222   BUF_MEM_free(s->s3->sniff_buffer);
223   ssl3_cleanup_key_block(s);
224   ssl3_release_read_buffer(s);
225   ssl3_release_write_buffer(s);
226   DH_free(s->s3->tmp.dh);
227   EC_KEY_free(s->s3->tmp.ecdh);
228 
229   sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
230   OPENSSL_free(s->s3->tmp.certificate_types);
231   OPENSSL_free(s->s3->tmp.peer_ecpointformatlist);
232   OPENSSL_free(s->s3->tmp.peer_ellipticcurvelist);
233   OPENSSL_free(s->s3->tmp.peer_psk_identity_hint);
234   BIO_free(s->s3->handshake_buffer);
235   ssl3_free_digest_list(s);
236   OPENSSL_free(s->s3->alpn_selected);
237 
238   OPENSSL_cleanse(s->s3, sizeof *s->s3);
239   OPENSSL_free(s->s3);
240   s->s3 = NULL;
241 }
242 
243 static int ssl3_set_req_cert_type(CERT *c, const uint8_t *p, size_t len);
244 
SSL_session_reused(const SSL * ssl)245 int SSL_session_reused(const SSL *ssl) {
246   return ssl->hit;
247 }
248 
SSL_total_renegotiations(const SSL * ssl)249 int SSL_total_renegotiations(const SSL *ssl) {
250   return ssl->s3->total_renegotiations;
251 }
252 
SSL_num_renegotiations(const SSL * ssl)253 int SSL_num_renegotiations(const SSL *ssl) {
254   return SSL_total_renegotiations(ssl);
255 }
256 
SSL_CTX_need_tmp_RSA(const SSL_CTX * ctx)257 int SSL_CTX_need_tmp_RSA(const SSL_CTX *ctx) {
258   return 0;
259 }
260 
SSL_need_rsa(const SSL * ssl)261 int SSL_need_rsa(const SSL *ssl) {
262   return 0;
263 }
264 
SSL_CTX_set_tmp_rsa(SSL_CTX * ctx,const RSA * rsa)265 int SSL_CTX_set_tmp_rsa(SSL_CTX *ctx, const RSA *rsa) {
266   return 1;
267 }
268 
SSL_set_tmp_rsa(SSL * ssl,const RSA * rsa)269 int SSL_set_tmp_rsa(SSL *ssl, const RSA *rsa) {
270   return 1;
271 }
272 
SSL_CTX_set_tmp_dh(SSL_CTX * ctx,const DH * dh)273 int SSL_CTX_set_tmp_dh(SSL_CTX *ctx, const DH *dh) {
274   DH_free(ctx->cert->dh_tmp);
275   ctx->cert->dh_tmp = DHparams_dup(dh);
276   if (ctx->cert->dh_tmp == NULL) {
277     OPENSSL_PUT_ERROR(SSL, SSL_CTX_set_tmp_dh, ERR_R_DH_LIB);
278     return 0;
279   }
280   return 1;
281 }
282 
SSL_set_tmp_dh(SSL * ssl,const DH * dh)283 int SSL_set_tmp_dh(SSL *ssl, const DH *dh) {
284   DH_free(ssl->cert->dh_tmp);
285   ssl->cert->dh_tmp = DHparams_dup(dh);
286   if (ssl->cert->dh_tmp == NULL) {
287     OPENSSL_PUT_ERROR(SSL, SSL_set_tmp_dh, ERR_R_DH_LIB);
288     return 0;
289   }
290   return 1;
291 }
292 
SSL_CTX_set_tmp_ecdh(SSL_CTX * ctx,const EC_KEY * ec_key)293 int SSL_CTX_set_tmp_ecdh(SSL_CTX *ctx, const EC_KEY *ec_key) {
294   if (ec_key == NULL || EC_KEY_get0_group(ec_key) == NULL) {
295     OPENSSL_PUT_ERROR(SSL, SSL_CTX_set_tmp_ecdh, ERR_R_PASSED_NULL_PARAMETER);
296     return 0;
297   }
298   ctx->cert->ecdh_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec_key));
299   return 1;
300 }
301 
SSL_set_tmp_ecdh(SSL * ssl,const EC_KEY * ec_key)302 int SSL_set_tmp_ecdh(SSL *ssl, const EC_KEY *ec_key) {
303   if (ec_key == NULL || EC_KEY_get0_group(ec_key) == NULL) {
304     OPENSSL_PUT_ERROR(SSL, SSL_set_tmp_ecdh, ERR_R_PASSED_NULL_PARAMETER);
305     return 0;
306   }
307   ssl->cert->ecdh_nid = EC_GROUP_get_curve_name(EC_KEY_get0_group(ec_key));
308   return 1;
309 }
310 
SSL_CTX_enable_tls_channel_id(SSL_CTX * ctx)311 int SSL_CTX_enable_tls_channel_id(SSL_CTX *ctx) {
312   ctx->tlsext_channel_id_enabled = 1;
313   return 1;
314 }
315 
SSL_enable_tls_channel_id(SSL * ssl)316 int SSL_enable_tls_channel_id(SSL *ssl) {
317   ssl->tlsext_channel_id_enabled = 1;
318   return 1;
319 }
320 
SSL_CTX_set1_tls_channel_id(SSL_CTX * ctx,EVP_PKEY * private_key)321 int SSL_CTX_set1_tls_channel_id(SSL_CTX *ctx, EVP_PKEY *private_key) {
322   ctx->tlsext_channel_id_enabled = 1;
323   if (EVP_PKEY_id(private_key) != EVP_PKEY_EC ||
324       EVP_PKEY_bits(private_key) != 256) {
325     OPENSSL_PUT_ERROR(SSL, SSL_CTX_set1_tls_channel_id,
326                       SSL_R_CHANNEL_ID_NOT_P256);
327     return 0;
328   }
329   EVP_PKEY_free(ctx->tlsext_channel_id_private);
330   ctx->tlsext_channel_id_private = EVP_PKEY_up_ref(private_key);
331   return 1;
332 }
333 
SSL_set1_tls_channel_id(SSL * ssl,EVP_PKEY * private_key)334 int SSL_set1_tls_channel_id(SSL *ssl, EVP_PKEY *private_key) {
335   ssl->tlsext_channel_id_enabled = 1;
336   if (EVP_PKEY_id(private_key) != EVP_PKEY_EC ||
337       EVP_PKEY_bits(private_key) != 256) {
338     OPENSSL_PUT_ERROR(SSL, SSL_set1_tls_channel_id, SSL_R_CHANNEL_ID_NOT_P256);
339     return 0;
340   }
341   EVP_PKEY_free(ssl->tlsext_channel_id_private);
342   ssl->tlsext_channel_id_private = EVP_PKEY_up_ref(private_key);
343   return 1;
344 }
345 
SSL_get_tls_channel_id(SSL * ssl,uint8_t * out,size_t max_out)346 size_t SSL_get_tls_channel_id(SSL *ssl, uint8_t *out, size_t max_out) {
347   if (!ssl->s3->tlsext_channel_id_valid) {
348     return 0;
349   }
350   memcpy(out, ssl->s3->tlsext_channel_id, (max_out < 64) ? max_out : 64);
351   return 64;
352 }
353 
SSL_set_tlsext_host_name(SSL * ssl,const char * name)354 int SSL_set_tlsext_host_name(SSL *ssl, const char *name) {
355   OPENSSL_free(ssl->tlsext_hostname);
356   ssl->tlsext_hostname = NULL;
357 
358   if (name == NULL) {
359     return 1;
360   }
361   if (strlen(name) > TLSEXT_MAXLEN_host_name) {
362     OPENSSL_PUT_ERROR(SSL, SSL_set_tlsext_host_name,
363                       SSL_R_SSL3_EXT_INVALID_SERVERNAME);
364     return 0;
365   }
366   ssl->tlsext_hostname = BUF_strdup(name);
367   if (ssl->tlsext_hostname == NULL) {
368     OPENSSL_PUT_ERROR(SSL, SSL_set_tlsext_host_name, ERR_R_MALLOC_FAILURE);
369     return 0;
370   }
371   return 1;
372 }
373 
ssl3_ctrl(SSL * s,int cmd,long larg,void * parg)374 long ssl3_ctrl(SSL *s, int cmd, long larg, void *parg) {
375   int ret = 0;
376 
377   switch (cmd) {
378     case SSL_CTRL_CHAIN:
379       if (larg) {
380         return ssl_cert_set1_chain(s->cert, (STACK_OF(X509) *)parg);
381       } else {
382         return ssl_cert_set0_chain(s->cert, (STACK_OF(X509) *)parg);
383       }
384 
385     case SSL_CTRL_CHAIN_CERT:
386       if (larg) {
387         return ssl_cert_add1_chain_cert(s->cert, (X509 *)parg);
388       } else {
389         return ssl_cert_add0_chain_cert(s->cert, (X509 *)parg);
390       }
391 
392     case SSL_CTRL_GET_CHAIN_CERTS:
393       *(STACK_OF(X509) **)parg = s->cert->key->chain;
394       ret = 1;
395       break;
396 
397     case SSL_CTRL_SELECT_CURRENT_CERT:
398       return ssl_cert_select_current(s->cert, (X509 *)parg);
399 
400     case SSL_CTRL_GET_CURVES: {
401       const uint16_t *clist = s->s3->tmp.peer_ellipticcurvelist;
402       size_t clistlen = s->s3->tmp.peer_ellipticcurvelist_length;
403       if (parg) {
404         size_t i;
405         int *cptr = parg;
406         int nid;
407         for (i = 0; i < clistlen; i++) {
408           nid = tls1_ec_curve_id2nid(clist[i]);
409           if (nid != NID_undef) {
410             cptr[i] = nid;
411           } else {
412             cptr[i] = TLSEXT_nid_unknown | clist[i];
413           }
414         }
415       }
416       return (int)clistlen;
417     }
418 
419     case SSL_CTRL_SET_CURVES:
420       return tls1_set_curves(&s->tlsext_ellipticcurvelist,
421                              &s->tlsext_ellipticcurvelist_length, parg, larg);
422 
423     case SSL_CTRL_SET_SIGALGS:
424       return tls1_set_sigalgs(s->cert, parg, larg, 0);
425 
426     case SSL_CTRL_SET_CLIENT_SIGALGS:
427       return tls1_set_sigalgs(s->cert, parg, larg, 1);
428 
429     case SSL_CTRL_GET_CLIENT_CERT_TYPES: {
430       const uint8_t **pctype = parg;
431       if (s->server || !s->s3->tmp.cert_req) {
432         return 0;
433       }
434       if (pctype) {
435         *pctype = s->s3->tmp.certificate_types;
436       }
437       return (int)s->s3->tmp.num_certificate_types;
438     }
439 
440     case SSL_CTRL_SET_CLIENT_CERT_TYPES:
441       if (!s->server) {
442         return 0;
443       }
444       return ssl3_set_req_cert_type(s->cert, parg, larg);
445 
446     case SSL_CTRL_BUILD_CERT_CHAIN:
447       return ssl_build_cert_chain(s->cert, s->ctx->cert_store, larg);
448 
449     case SSL_CTRL_SET_VERIFY_CERT_STORE:
450       return ssl_cert_set_cert_store(s->cert, parg, 0, larg);
451 
452     case SSL_CTRL_SET_CHAIN_CERT_STORE:
453       return ssl_cert_set_cert_store(s->cert, parg, 1, larg);
454 
455     case SSL_CTRL_GET_SERVER_TMP_KEY:
456       if (s->server || !s->session || !s->session->sess_cert) {
457         return 0;
458       } else {
459         SESS_CERT *sc;
460         EVP_PKEY *ptmp;
461         int rv = 0;
462         sc = s->session->sess_cert;
463         if (!sc->peer_dh_tmp && !sc->peer_ecdh_tmp) {
464           return 0;
465         }
466         ptmp = EVP_PKEY_new();
467         if (!ptmp) {
468           return 0;
469         }
470         if (sc->peer_dh_tmp) {
471           rv = EVP_PKEY_set1_DH(ptmp, sc->peer_dh_tmp);
472         } else if (sc->peer_ecdh_tmp) {
473           rv = EVP_PKEY_set1_EC_KEY(ptmp, sc->peer_ecdh_tmp);
474         }
475         if (rv) {
476           *(EVP_PKEY **)parg = ptmp;
477           return 1;
478         }
479         EVP_PKEY_free(ptmp);
480         return 0;
481       }
482 
483     case SSL_CTRL_GET_EC_POINT_FORMATS: {
484       const uint8_t **pformat = parg;
485       if (!s->s3->tmp.peer_ecpointformatlist) {
486         return 0;
487       }
488       *pformat = s->s3->tmp.peer_ecpointformatlist;
489       return (int)s->s3->tmp.peer_ecpointformatlist_length;
490     }
491 
492     default:
493       break;
494   }
495 
496   return ret;
497 }
498 
ssl3_ctx_ctrl(SSL_CTX * ctx,int cmd,long larg,void * parg)499 long ssl3_ctx_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) {
500   switch (cmd) {
501     case SSL_CTRL_SET_TLSEXT_TICKET_KEYS:
502     case SSL_CTRL_GET_TLSEXT_TICKET_KEYS: {
503       uint8_t *keys = parg;
504       if (!keys) {
505         return 48;
506       }
507       if (larg != 48) {
508         OPENSSL_PUT_ERROR(SSL, ssl3_ctx_ctrl, SSL_R_INVALID_TICKET_KEYS_LENGTH);
509         return 0;
510       }
511       if (cmd == SSL_CTRL_SET_TLSEXT_TICKET_KEYS) {
512         memcpy(ctx->tlsext_tick_key_name, keys, 16);
513         memcpy(ctx->tlsext_tick_hmac_key, keys + 16, 16);
514         memcpy(ctx->tlsext_tick_aes_key, keys + 32, 16);
515       } else {
516         memcpy(keys, ctx->tlsext_tick_key_name, 16);
517         memcpy(keys + 16, ctx->tlsext_tick_hmac_key, 16);
518         memcpy(keys + 32, ctx->tlsext_tick_aes_key, 16);
519       }
520       return 1;
521     }
522 
523     case SSL_CTRL_SET_CURVES:
524       return tls1_set_curves(&ctx->tlsext_ellipticcurvelist,
525                              &ctx->tlsext_ellipticcurvelist_length, parg, larg);
526 
527     case SSL_CTRL_SET_SIGALGS:
528       return tls1_set_sigalgs(ctx->cert, parg, larg, 0);
529 
530     case SSL_CTRL_SET_CLIENT_SIGALGS:
531       return tls1_set_sigalgs(ctx->cert, parg, larg, 1);
532 
533     case SSL_CTRL_SET_CLIENT_CERT_TYPES:
534       return ssl3_set_req_cert_type(ctx->cert, parg, larg);
535 
536     case SSL_CTRL_BUILD_CERT_CHAIN:
537       return ssl_build_cert_chain(ctx->cert, ctx->cert_store, larg);
538 
539     case SSL_CTRL_SET_VERIFY_CERT_STORE:
540       return ssl_cert_set_cert_store(ctx->cert, parg, 0, larg);
541 
542     case SSL_CTRL_SET_CHAIN_CERT_STORE:
543       return ssl_cert_set_cert_store(ctx->cert, parg, 1, larg);
544 
545     case SSL_CTRL_EXTRA_CHAIN_CERT:
546       if (ctx->extra_certs == NULL) {
547         ctx->extra_certs = sk_X509_new_null();
548         if (ctx->extra_certs == NULL) {
549           return 0;
550         }
551       }
552       sk_X509_push(ctx->extra_certs, (X509 *)parg);
553       break;
554 
555     case SSL_CTRL_GET_EXTRA_CHAIN_CERTS:
556       if (ctx->extra_certs == NULL && larg == 0) {
557         *(STACK_OF(X509) **)parg = ctx->cert->key->chain;
558       } else {
559         *(STACK_OF(X509) **)parg = ctx->extra_certs;
560       }
561       break;
562 
563     case SSL_CTRL_CLEAR_EXTRA_CHAIN_CERTS:
564       sk_X509_pop_free(ctx->extra_certs, X509_free);
565       ctx->extra_certs = NULL;
566       break;
567 
568     case SSL_CTRL_CHAIN:
569       if (larg) {
570         return ssl_cert_set1_chain(ctx->cert, (STACK_OF(X509) *)parg);
571       } else {
572         return ssl_cert_set0_chain(ctx->cert, (STACK_OF(X509) *)parg);
573       }
574 
575     case SSL_CTRL_CHAIN_CERT:
576       if (larg) {
577         return ssl_cert_add1_chain_cert(ctx->cert, (X509 *)parg);
578       } else {
579         return ssl_cert_add0_chain_cert(ctx->cert, (X509 *)parg);
580       }
581 
582     case SSL_CTRL_GET_CHAIN_CERTS:
583       *(STACK_OF(X509) **)parg = ctx->cert->key->chain;
584       break;
585 
586     case SSL_CTRL_SELECT_CURRENT_CERT:
587       return ssl_cert_select_current(ctx->cert, (X509 *)parg);
588 
589     default:
590       return 0;
591   }
592 
593   return 1;
594 }
595 
SSL_CTX_set_tlsext_servername_callback(SSL_CTX * ctx,int (* callback)(SSL * ssl,int * out_alert,void * arg))596 int SSL_CTX_set_tlsext_servername_callback(
597     SSL_CTX *ctx, int (*callback)(SSL *ssl, int *out_alert, void *arg)) {
598   ctx->tlsext_servername_callback = callback;
599   return 1;
600 }
601 
SSL_CTX_set_tlsext_servername_arg(SSL_CTX * ctx,void * arg)602 int SSL_CTX_set_tlsext_servername_arg(SSL_CTX *ctx, void *arg) {
603   ctx->tlsext_servername_arg = arg;
604   return 1;
605 }
606 
SSL_CTX_set_tlsext_ticket_key_cb(SSL_CTX * ctx,int (* callback)(SSL * ssl,uint8_t * key_name,uint8_t * iv,EVP_CIPHER_CTX * ctx,HMAC_CTX * hmac_ctx,int encrypt))607 int SSL_CTX_set_tlsext_ticket_key_cb(
608     SSL_CTX *ctx, int (*callback)(SSL *ssl, uint8_t *key_name, uint8_t *iv,
609                                   EVP_CIPHER_CTX *ctx, HMAC_CTX *hmac_ctx,
610                                   int encrypt)) {
611   ctx->tlsext_ticket_key_cb = callback;
612   return 1;
613 }
614 
ssl_get_cipher_preferences(SSL * s)615 struct ssl_cipher_preference_list_st *ssl_get_cipher_preferences(SSL *s) {
616   if (s->cipher_list != NULL) {
617     return s->cipher_list;
618   }
619 
620   if (s->version >= TLS1_1_VERSION && s->ctx != NULL &&
621       s->ctx->cipher_list_tls11 != NULL) {
622     return s->ctx->cipher_list_tls11;
623   }
624 
625   if (s->ctx != NULL && s->ctx->cipher_list != NULL) {
626     return s->ctx->cipher_list;
627   }
628 
629   return NULL;
630 }
631 
ssl3_choose_cipher(SSL * s,STACK_OF (SSL_CIPHER)* clnt,struct ssl_cipher_preference_list_st * server_pref)632 const SSL_CIPHER *ssl3_choose_cipher(
633     SSL *s, STACK_OF(SSL_CIPHER) *clnt,
634     struct ssl_cipher_preference_list_st *server_pref) {
635   const SSL_CIPHER *c, *ret = NULL;
636   STACK_OF(SSL_CIPHER) *srvr = server_pref->ciphers, *prio, *allow;
637   size_t i;
638   int ok;
639   size_t cipher_index;
640   uint32_t alg_k, alg_a, mask_k, mask_a;
641   /* in_group_flags will either be NULL, or will point to an array of bytes
642    * which indicate equal-preference groups in the |prio| stack. See the
643    * comment about |in_group_flags| in the |ssl_cipher_preference_list_st|
644    * struct. */
645   const uint8_t *in_group_flags;
646   /* group_min contains the minimal index so far found in a group, or -1 if no
647    * such value exists yet. */
648   int group_min = -1;
649 
650   if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) {
651     prio = srvr;
652     in_group_flags = server_pref->in_group_flags;
653     allow = clnt;
654   } else {
655     prio = clnt;
656     in_group_flags = NULL;
657     allow = srvr;
658   }
659 
660   ssl_get_compatible_server_ciphers(s, &mask_k, &mask_a);
661 
662   for (i = 0; i < sk_SSL_CIPHER_num(prio); i++) {
663     c = sk_SSL_CIPHER_value(prio, i);
664 
665     ok = 1;
666 
667     /* Skip TLS v1.2 only ciphersuites if not supported */
668     if ((c->algorithm_ssl & SSL_TLSV1_2) && !SSL_USE_TLS1_2_CIPHERS(s)) {
669       ok = 0;
670     }
671 
672     alg_k = c->algorithm_mkey;
673     alg_a = c->algorithm_auth;
674 
675     ok = ok && (alg_k & mask_k) && (alg_a & mask_a);
676 
677     if (ok && sk_SSL_CIPHER_find(allow, &cipher_index, c)) {
678       if (in_group_flags != NULL && in_group_flags[i] == 1) {
679         /* This element of |prio| is in a group. Update the minimum index found
680          * so far and continue looking. */
681         if (group_min == -1 || (size_t)group_min > cipher_index) {
682           group_min = cipher_index;
683         }
684       } else {
685         if (group_min != -1 && (size_t)group_min < cipher_index) {
686           cipher_index = group_min;
687         }
688         ret = sk_SSL_CIPHER_value(allow, cipher_index);
689         break;
690       }
691     }
692 
693     if (in_group_flags != NULL && in_group_flags[i] == 0 && group_min != -1) {
694       /* We are about to leave a group, but we found a match in it, so that's
695        * our answer. */
696       ret = sk_SSL_CIPHER_value(allow, group_min);
697       break;
698     }
699   }
700 
701   return ret;
702 }
703 
ssl3_get_req_cert_type(SSL * s,uint8_t * p)704 int ssl3_get_req_cert_type(SSL *s, uint8_t *p) {
705   int ret = 0;
706   const uint8_t *sig;
707   size_t i, siglen;
708   int have_rsa_sign = 0;
709   int have_ecdsa_sign = 0;
710 
711   /* If we have custom certificate types set, use them */
712   if (s->cert->client_certificate_types) {
713     memcpy(p, s->cert->client_certificate_types,
714            s->cert->num_client_certificate_types);
715     return s->cert->num_client_certificate_types;
716   }
717 
718   /* get configured sigalgs */
719   siglen = tls12_get_psigalgs(s, &sig);
720   for (i = 0; i < siglen; i += 2, sig += 2) {
721     switch (sig[1]) {
722       case TLSEXT_signature_rsa:
723         have_rsa_sign = 1;
724         break;
725 
726       case TLSEXT_signature_ecdsa:
727         have_ecdsa_sign = 1;
728         break;
729     }
730   }
731 
732   if (have_rsa_sign) {
733     p[ret++] = SSL3_CT_RSA_SIGN;
734   }
735 
736   /* ECDSA certs can be used with RSA cipher suites as well so we don't need to
737    * check for SSL_kECDH or SSL_kECDHE. */
738   if (s->version >= TLS1_VERSION && have_ecdsa_sign) {
739       p[ret++] = TLS_CT_ECDSA_SIGN;
740   }
741 
742   return ret;
743 }
744 
ssl3_set_req_cert_type(CERT * c,const uint8_t * p,size_t len)745 static int ssl3_set_req_cert_type(CERT *c, const uint8_t *p, size_t len) {
746   OPENSSL_free(c->client_certificate_types);
747   c->client_certificate_types = NULL;
748   c->num_client_certificate_types = 0;
749 
750   if (!p || !len) {
751     return 1;
752   }
753 
754   if (len > 0xff) {
755     return 0;
756   }
757 
758   c->client_certificate_types = BUF_memdup(p, len);
759   if (!c->client_certificate_types) {
760     return 0;
761   }
762 
763   c->num_client_certificate_types = len;
764   return 1;
765 }
766 
767 /* If we are using default SHA1+MD5 algorithms switch to new SHA256 PRF and
768  * handshake macs if required. */
ssl_get_algorithm2(SSL * s)769 uint32_t ssl_get_algorithm2(SSL *s) {
770   static const uint32_t kMask = SSL_HANDSHAKE_MAC_DEFAULT;
771   uint32_t alg2 = s->s3->tmp.new_cipher->algorithm2;
772   if (s->enc_method->enc_flags & SSL_ENC_FLAG_SHA256_PRF &&
773       (alg2 & kMask) == kMask) {
774     return SSL_HANDSHAKE_MAC_SHA256;
775   }
776   return alg2;
777 }
778