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) 1998-2001 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).
112 #include "ssl_locl.h"
113 #ifndef OPENSSL_NO_SSL2
115 #include <openssl/rand.h>
116 #include <openssl/buffer.h>
117 #include <openssl/objects.h>
118 #include <openssl/evp.h>
120 static SSL_METHOD *ssl2_get_client_method(int ver);
121 static int get_server_finished(SSL *s);
122 static int get_server_verify(SSL *s);
123 static int get_server_hello(SSL *s);
124 static int client_hello(SSL *s);
125 static int client_master_key(SSL *s);
126 static int client_finished(SSL *s);
127 static int client_certificate(SSL *s);
128 static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
129 unsigned char *to,int padding);
132 static SSL_METHOD *ssl2_get_client_method(int ver)
134 if (ver == SSL2_VERSION)
135 return(SSLv2_client_method());
140 IMPLEMENT_ssl2_meth_func(SSLv2_client_method,
141 ssl_undefined_function,
143 ssl2_get_client_method)
145 int ssl2_connect(SSL *s)
147 unsigned long l=(unsigned long)time(NULL);
150 void (*cb)(const SSL *ssl,int type,int val)=NULL;
153 RAND_add(&l,sizeof(l),0);
157 if (s->info_callback != NULL)
159 else if (s->ctx->info_callback != NULL)
160 cb=s->ctx->info_callback;
162 /* init things to blank */
164 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
174 case SSL_ST_BEFORE|SSL_ST_CONNECT:
175 case SSL_ST_OK|SSL_ST_CONNECT:
178 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
180 s->version=SSL2_VERSION;
181 s->type=SSL_ST_CONNECT;
184 if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
189 if (!BUF_MEM_grow(buf,
190 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
192 if (buf == s->init_buf)
200 s->state=SSL2_ST_SEND_CLIENT_HELLO_A;
201 s->ctx->stats.sess_connect++;
202 s->handshake_func=ssl2_connect;
205 case SSL2_ST_SEND_CLIENT_HELLO_A:
206 case SSL2_ST_SEND_CLIENT_HELLO_B:
209 if (ret <= 0) goto end;
211 s->state=SSL2_ST_GET_SERVER_HELLO_A;
214 case SSL2_ST_GET_SERVER_HELLO_A:
215 case SSL2_ST_GET_SERVER_HELLO_B:
216 ret=get_server_hello(s);
217 if (ret <= 0) goto end;
219 if (!s->hit) /* new session */
221 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_A;
226 s->state=SSL2_ST_CLIENT_START_ENCRYPTION;
230 case SSL2_ST_SEND_CLIENT_MASTER_KEY_A:
231 case SSL2_ST_SEND_CLIENT_MASTER_KEY_B:
232 ret=client_master_key(s);
233 if (ret <= 0) goto end;
235 s->state=SSL2_ST_CLIENT_START_ENCRYPTION;
238 case SSL2_ST_CLIENT_START_ENCRYPTION:
239 /* Ok, we now have all the stuff needed to
240 * start encrypting, so lets fire it up :-) */
241 if (!ssl2_enc_init(s,1))
247 s->state=SSL2_ST_SEND_CLIENT_FINISHED_A;
250 case SSL2_ST_SEND_CLIENT_FINISHED_A:
251 case SSL2_ST_SEND_CLIENT_FINISHED_B:
252 ret=client_finished(s);
253 if (ret <= 0) goto end;
255 s->state=SSL2_ST_GET_SERVER_VERIFY_A;
258 case SSL2_ST_GET_SERVER_VERIFY_A:
259 case SSL2_ST_GET_SERVER_VERIFY_B:
260 ret=get_server_verify(s);
261 if (ret <= 0) goto end;
263 s->state=SSL2_ST_GET_SERVER_FINISHED_A;
266 case SSL2_ST_GET_SERVER_FINISHED_A:
267 case SSL2_ST_GET_SERVER_FINISHED_B:
268 ret=get_server_finished(s);
269 if (ret <= 0) goto end;
272 case SSL2_ST_SEND_CLIENT_CERTIFICATE_A:
273 case SSL2_ST_SEND_CLIENT_CERTIFICATE_B:
274 case SSL2_ST_SEND_CLIENT_CERTIFICATE_C:
275 case SSL2_ST_SEND_CLIENT_CERTIFICATE_D:
276 case SSL2_ST_X509_GET_CLIENT_CERTIFICATE:
277 ret=client_certificate(s);
278 if (ret <= 0) goto end;
280 s->state=SSL2_ST_GET_SERVER_FINISHED_A;
284 if (s->init_buf != NULL)
286 BUF_MEM_free(s->init_buf);
290 /* ERR_clear_error();*/
292 /* If we want to cache session-ids in the client
293 * and we successfully add the session-id to the
294 * cache, and there is a callback, then pass it out.
295 * 26/11/96 - eay - only add if not a re-used session.
298 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
299 if (s->hit) s->ctx->stats.sess_hit++;
303 s->ctx->stats.sess_connect_good++;
305 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
310 SSLerr(SSL_F_SSL2_CONNECT,SSL_R_UNKNOWN_STATE);
315 if ((cb != NULL) && (s->state != state))
319 cb(s,SSL_CB_CONNECT_LOOP,1);
328 cb(s,SSL_CB_CONNECT_EXIT,ret);
332 static int get_server_hello(SSL *s)
338 STACK_OF(SSL_CIPHER) *sk=NULL,*cl, *prio, *allow;
340 buf=(unsigned char *)s->init_buf->data;
342 if (s->state == SSL2_ST_GET_SERVER_HELLO_A)
344 i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num);
345 if (i < (11-s->init_num))
346 return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
349 if (*(p++) != SSL2_MT_SERVER_HELLO)
351 if (p[-1] != SSL2_MT_ERROR)
353 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
354 SSLerr(SSL_F_GET_SERVER_HELLO,
355 SSL_R_READ_WRONG_PACKET_TYPE);
358 SSLerr(SSL_F_GET_SERVER_HELLO,
363 /* The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug
364 * workaround. <appro@fy.chalmers.se> */
365 s->hit=(i=*(p++))?1:0;
369 s->s2->tmp.cert_type= *(p++);
371 if (i < s->version) s->version=i;
372 n2s(p,i); s->s2->tmp.cert_length=i;
373 n2s(p,i); s->s2->tmp.csl=i;
374 n2s(p,i); s->s2->tmp.conn_id_length=i;
375 s->state=SSL2_ST_GET_SERVER_HELLO_B;
378 /* SSL2_ST_GET_SERVER_HELLO_B */
379 len = 11 + (unsigned long)s->s2->tmp.cert_length + (unsigned long)s->s2->tmp.csl + (unsigned long)s->s2->tmp.conn_id_length;
380 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
382 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_MESSAGE_TOO_LONG);
385 j = (int)len - s->init_num;
386 i = ssl2_read(s,(char *)&(buf[s->init_num]),j);
387 if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
389 s->msg_callback(0, s->version, 0, buf, (size_t)len, s, s->msg_callback_arg); /* SERVER-HELLO */
391 /* things are looking good */
396 if (s->s2->tmp.cert_length != 0)
398 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_LENGTH_NOT_ZERO);
401 if (s->s2->tmp.cert_type != 0)
404 SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG))
406 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_TYPE_NOT_ZERO);
410 if (s->s2->tmp.csl != 0)
412 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO);
420 memset(s->session->session_id,0,
421 SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES);
422 s->session->session_id_length=0;
426 /* we need to do this in case we were trying to reuse a
427 * client session but others are already reusing it.
428 * If this was a new 'blank' session ID, the session-id
429 * length will still be 0 */
430 if (s->session->session_id_length > 0)
432 if (!ssl_get_new_session(s,0))
434 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
439 if (ssl2_set_certificate(s,s->s2->tmp.cert_type,
440 s->s2->tmp.cert_length,p) <= 0)
442 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
445 p+=s->s2->tmp.cert_length;
447 if (s->s2->tmp.csl == 0)
449 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
450 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_LIST);
454 /* We have just received a list of ciphers back from the
455 * server. We need to get the ones that match, then select
456 * the one we want the most :-). */
458 /* load the ciphers */
459 sk=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.csl,
460 &s->session->ciphers);
464 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
465 SSLerr(SSL_F_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE);
469 (void)sk_SSL_CIPHER_set_cmp_func(sk,ssl_cipher_ptr_id_cmp);
471 /* get the array of ciphers we will accept */
472 cl=SSL_get_ciphers(s);
473 (void)sk_SSL_CIPHER_set_cmp_func(cl,ssl_cipher_ptr_id_cmp);
476 * If server preference flag set, choose the first
477 * (highest priority) cipher the server sends, otherwise
478 * client preference has priority.
480 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
490 /* In theory we could have ciphers sent back that we
491 * don't want to use but that does not matter since we
492 * will check against the list we originally sent and
493 * for performance reasons we should not bother to match
494 * the two lists up just to check. */
495 for (i=0; i<sk_SSL_CIPHER_num(prio); i++)
497 if (sk_SSL_CIPHER_find(allow,
498 sk_SSL_CIPHER_value(prio,i)) >= 0)
502 if (i >= sk_SSL_CIPHER_num(prio))
504 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
505 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_MATCH);
508 s->session->cipher=sk_SSL_CIPHER_value(prio,i);
511 if (s->session->peer != NULL) /* can't happen*/
513 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
514 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
518 s->session->peer = s->session->sess_cert->peer_key->x509;
519 /* peer_key->x509 has been set by ssl2_set_certificate. */
520 CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509);
523 if (s->session->sess_cert == NULL
524 || s->session->peer != s->session->sess_cert->peer_key->x509)
527 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
528 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
532 s->s2->conn_id_length=s->s2->tmp.conn_id_length;
533 if (s->s2->conn_id_length > sizeof s->s2->conn_id)
535 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
536 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG);
539 memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length);
543 static int client_hello(SSL *s)
547 /* CIPHER **cipher;*/
550 buf=(unsigned char *)s->init_buf->data;
551 if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A)
553 if ((s->session == NULL) ||
554 (s->session->ssl_version != s->version))
556 if (!ssl_get_new_session(s,0))
558 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
562 /* else use the pre-loaded session */
565 d=p+9; /* data section */
566 *(p++)=SSL2_MT_CLIENT_HELLO; /* type */
567 s2n(SSL2_VERSION,p); /* version */
570 n=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),d,0);
575 SSLerr(SSL_F_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
579 s2n(n,p); /* cipher spec num bytes */
581 if ((s->session->session_id_length > 0) &&
582 (s->session->session_id_length <=
583 SSL2_MAX_SSL_SESSION_ID_LENGTH))
585 i=s->session->session_id_length;
586 s2n(i,p); /* session id length */
587 memcpy(d,s->session->session_id,(unsigned int)i);
595 s->s2->challenge_length=SSL2_CHALLENGE_LENGTH;
596 s2n(SSL2_CHALLENGE_LENGTH,p); /* challenge length */
597 /*challenge id data*/
598 if (RAND_pseudo_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH) <= 0)
600 memcpy(d,s->s2->challenge,SSL2_CHALLENGE_LENGTH);
601 d+=SSL2_CHALLENGE_LENGTH;
603 s->state=SSL2_ST_SEND_CLIENT_HELLO_B;
607 /* SSL2_ST_SEND_CLIENT_HELLO_B */
608 return(ssl2_do_write(s));
611 static int client_master_key(SSL *s)
615 int clear,enc,karg,i;
620 buf=(unsigned char *)s->init_buf->data;
621 if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A)
624 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))
626 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
627 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
633 *(p++)=SSL2_MT_CLIENT_MASTER_KEY;/* type */
635 i=ssl_put_cipher_by_char(s,sess->cipher,p);
638 /* make key_arg data */
639 i=EVP_CIPHER_iv_length(c);
640 sess->key_arg_length=i;
641 if (i > SSL_MAX_KEY_ARG_LENGTH)
643 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
644 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
648 if (RAND_pseudo_bytes(sess->key_arg,i) <= 0)
651 /* make a master key */
652 i=EVP_CIPHER_key_length(c);
653 sess->master_key_length=i;
656 if (i > (int)sizeof(sess->master_key))
658 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
659 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
662 if (RAND_bytes(sess->master_key,i) <= 0)
664 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
669 if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
671 else if (SSL_C_IS_EXPORT(sess->cipher))
678 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
679 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_CIPHER_TABLE_SRC_ERROR);
684 memcpy(d,sess->master_key,(unsigned int)clear);
687 enc=ssl_rsa_public_encrypt(sess->sess_cert,enc,
688 &(sess->master_key[clear]),d,
689 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
692 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
693 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PUBLIC_KEY_ENCRYPT_ERROR);
697 if (s->options & SSL_OP_PKCS1_CHECK_1) d[1]++;
698 if (s->options & SSL_OP_PKCS1_CHECK_2)
699 sess->master_key[clear]++;
703 karg=sess->key_arg_length;
704 s2n(karg,p); /* key arg size */
705 if (karg > (int)sizeof(sess->key_arg))
707 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
708 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
711 memcpy(d,sess->key_arg,(unsigned int)karg);
714 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_B;
719 /* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */
720 return(ssl2_do_write(s));
723 static int client_finished(SSL *s)
727 if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A)
729 p=(unsigned char *)s->init_buf->data;
730 *(p++)=SSL2_MT_CLIENT_FINISHED;
731 if (s->s2->conn_id_length > sizeof s->s2->conn_id)
733 SSLerr(SSL_F_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
736 memcpy(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length);
738 s->state=SSL2_ST_SEND_CLIENT_FINISHED_B;
739 s->init_num=s->s2->conn_id_length+1;
742 return(ssl2_do_write(s));
745 /* read the data and then respond */
746 static int client_certificate(SSL *s)
753 unsigned char *cert_ch;
755 buf=(unsigned char *)s->init_buf->data;
757 /* We have a cert associated with the SSL, so attach it to
758 * the session if it does not have one */
760 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A)
762 i=ssl2_read(s,(char *)&(buf[s->init_num]),
763 SSL2_MAX_CERT_CHALLENGE_LENGTH+2-s->init_num);
764 if (i<(SSL2_MIN_CERT_CHALLENGE_LENGTH+2-s->init_num))
765 return(ssl2_part_read(s,SSL_F_CLIENT_CERTIFICATE,i));
768 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* REQUEST-CERTIFICATE */
772 if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
774 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
775 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_AUTHENTICATION_TYPE);
779 if ((s->cert == NULL) ||
780 (s->cert->key->x509 == NULL) ||
781 (s->cert->key->privatekey == NULL))
783 s->state=SSL2_ST_X509_GET_CLIENT_CERTIFICATE;
786 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
790 cert_ch_len = s->init_num - 2;
792 if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE)
797 /* If we get an error we need to
798 * ssl->rwstate=SSL_X509_LOOKUP;
800 * We should then be retried when things are ok and we
801 * can get a cert or not */
804 if (s->ctx->client_cert_cb != NULL)
806 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
811 s->rwstate=SSL_X509_LOOKUP;
814 s->rwstate=SSL_NOTHING;
816 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
818 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
819 if ( !SSL_use_certificate(s,x509) ||
820 !SSL_use_PrivateKey(s,pkey))
829 if (x509 != NULL) X509_free(x509);
830 if (pkey != NULL) EVP_PKEY_free(pkey);
831 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
837 /* We have no client certificate to respond with
838 * so send the correct error message back */
839 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_B;
841 *(p++)=SSL2_MT_ERROR;
842 s2n(SSL2_PE_NO_CERTIFICATE,p);
845 /* Write is done at the end */
849 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B)
851 return(ssl2_do_write(s));
854 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C)
858 /* ok, now we calculate the checksum
859 * do it first so we can reuse buf :-) */
861 EVP_MD_CTX_init(&ctx);
862 EVP_SignInit_ex(&ctx,s->ctx->rsa_md5, NULL);
863 EVP_SignUpdate(&ctx,s->s2->key_material,
864 s->s2->key_material_length);
865 EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len);
866 n=i2d_X509(s->session->sess_cert->peer_key->x509,&p);
867 EVP_SignUpdate(&ctx,buf,(unsigned int)n);
871 *(p++)=SSL2_MT_CLIENT_CERTIFICATE;
872 *(p++)=SSL2_CT_X509_CERTIFICATE;
873 n=i2d_X509(s->cert->key->x509,&d);
876 if (!EVP_SignFinal(&ctx,d,&n,s->cert->key->privatekey))
878 /* this is not good. If things have failed it
879 * means there so something wrong with the key.
880 * We will continue with a 0 length signature
883 EVP_MD_CTX_cleanup(&ctx);
887 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_D;
891 /* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */
892 return(ssl2_do_write(s));
895 static int get_server_verify(SSL *s)
900 p=(unsigned char *)s->init_buf->data;
901 if (s->state == SSL2_ST_GET_SERVER_VERIFY_A)
903 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
904 if (i < (1-s->init_num))
905 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));
908 s->state= SSL2_ST_GET_SERVER_VERIFY_B;
909 if (*p != SSL2_MT_SERVER_VERIFY)
911 if (p[0] != SSL2_MT_ERROR)
913 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
914 SSLerr(SSL_F_GET_SERVER_VERIFY,
915 SSL_R_READ_WRONG_PACKET_TYPE);
919 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_PEER_ERROR);
920 /* try to read the error message */
921 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
922 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
928 p=(unsigned char *)s->init_buf->data;
929 len = 1 + s->s2->challenge_length;
930 n = len - s->init_num;
931 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
933 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));
935 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* SERVER-VERIFY */
938 if (memcmp(p,s->s2->challenge,s->s2->challenge_length) != 0)
940 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
941 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_CHALLENGE_IS_DIFFERENT);
947 static int get_server_finished(SSL *s)
953 buf=(unsigned char *)s->init_buf->data;
955 if (s->state == SSL2_ST_GET_SERVER_FINISHED_A)
957 i=ssl2_read(s,(char *)&(buf[s->init_num]),1-s->init_num);
958 if (i < (1-s->init_num))
959 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));
962 if (*p == SSL2_MT_REQUEST_CERTIFICATE)
964 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_A;
967 else if (*p != SSL2_MT_SERVER_FINISHED)
969 if (p[0] != SSL2_MT_ERROR)
971 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
972 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
976 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_PEER_ERROR);
977 /* try to read the error message */
978 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
979 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
983 s->state=SSL2_ST_GET_SERVER_FINISHED_B;
986 len = 1 + SSL2_SSL_SESSION_ID_LENGTH;
987 n = len - s->init_num;
988 i = ssl2_read(s,(char *)&(buf[s->init_num]), n);
989 if (i < n) /* XXX could be shorter than SSL2_SSL_SESSION_ID_LENGTH, that's the maximum */
990 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));
993 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* SERVER-FINISHED */
995 if (!s->hit) /* new session */
998 /* Make sure we were not trying to re-use an old SSL_SESSION
999 * or bad things can happen */
1001 s->session->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
1002 memcpy(s->session->session_id,p+1,SSL2_SSL_SESSION_ID_LENGTH);
1006 if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG))
1008 if ((s->session->session_id_length > sizeof s->session->session_id)
1009 || (0 != memcmp(buf + 1, s->session->session_id,
1010 (unsigned int)s->session->session_id_length)))
1012 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
1013 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_SSL_SESSION_ID_IS_DIFFERENT);
1018 s->state = SSL_ST_OK;
1022 /* loads in the certificate from the server */
1023 int ssl2_set_certificate(SSL *s, int type, int len, const unsigned char *data)
1025 STACK_OF(X509) *sk=NULL;
1026 EVP_PKEY *pkey=NULL;
1032 x509=d2i_X509(NULL,&data,(long)len);
1035 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_X509_LIB);
1039 if ((sk=sk_X509_new_null()) == NULL || !sk_X509_push(sk,x509))
1041 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1045 i=ssl_verify_cert_chain(s,sk);
1047 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
1049 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1052 ERR_clear_error(); /* but we keep s->verify_result */
1053 s->session->verify_result = s->verify_result;
1055 /* server's cert for this session */
1056 sc=ssl_sess_cert_new();
1062 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1063 s->session->sess_cert=sc;
1065 sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509=x509;
1066 sc->peer_key= &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]);
1068 pkey=X509_get_pubkey(x509);
1072 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY);
1075 if (pkey->type != EVP_PKEY_RSA)
1077 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_PUBLIC_KEY_NOT_RSA);
1081 if (!ssl_set_peer_cert_type(sc,SSL2_CT_X509_CERTIFICATE))
1087 EVP_PKEY_free(pkey);
1091 static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
1092 unsigned char *to, int padding)
1094 EVP_PKEY *pkey=NULL;
1097 if ((sc == NULL) || (sc->peer_key->x509 == NULL) ||
1098 ((pkey=X509_get_pubkey(sc->peer_key->x509)) == NULL))
1100 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_NO_PUBLICKEY);
1103 if (pkey->type != EVP_PKEY_RSA)
1105 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
1109 /* we have the public key */
1110 i=RSA_public_encrypt(len,from,to,pkey->pkey.rsa,padding);
1112 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,ERR_R_RSA_LIB);
1114 EVP_PKEY_free(pkey);
1117 #else /* !OPENSSL_NO_SSL2 */
1120 static void *dummy=&dummy;