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 SSL_METHOD *SSLv2_client_method(void)
143 static SSL_METHOD SSLv2_client_data;
147 CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);
151 memcpy((char *)&SSLv2_client_data,(char *)sslv2_base_method(),
153 SSLv2_client_data.ssl_connect=ssl2_connect;
154 SSLv2_client_data.get_ssl_method=ssl2_get_client_method;
158 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
160 return(&SSLv2_client_data);
163 int ssl2_connect(SSL *s)
165 unsigned long l=time(NULL);
168 void (*cb)(const SSL *ssl,int type,int val)=NULL;
171 RAND_add(&l,sizeof(l),0);
175 if (s->info_callback != NULL)
177 else if (s->ctx->info_callback != NULL)
178 cb=s->ctx->info_callback;
180 /* init things to blank */
182 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
192 case SSL_ST_BEFORE|SSL_ST_CONNECT:
193 case SSL_ST_OK|SSL_ST_CONNECT:
196 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
198 s->version=SSL2_VERSION;
199 s->type=SSL_ST_CONNECT;
202 if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
207 if (!BUF_MEM_grow(buf,
208 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
210 if (buf == s->init_buf)
218 s->state=SSL2_ST_SEND_CLIENT_HELLO_A;
219 s->ctx->stats.sess_connect++;
220 s->handshake_func=ssl2_connect;
223 case SSL2_ST_SEND_CLIENT_HELLO_A:
224 case SSL2_ST_SEND_CLIENT_HELLO_B:
227 if (ret <= 0) goto end;
229 s->state=SSL2_ST_GET_SERVER_HELLO_A;
232 case SSL2_ST_GET_SERVER_HELLO_A:
233 case SSL2_ST_GET_SERVER_HELLO_B:
234 ret=get_server_hello(s);
235 if (ret <= 0) goto end;
237 if (!s->hit) /* new session */
239 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_A;
244 s->state=SSL2_ST_CLIENT_START_ENCRYPTION;
248 case SSL2_ST_SEND_CLIENT_MASTER_KEY_A:
249 case SSL2_ST_SEND_CLIENT_MASTER_KEY_B:
250 ret=client_master_key(s);
251 if (ret <= 0) goto end;
253 s->state=SSL2_ST_CLIENT_START_ENCRYPTION;
256 case SSL2_ST_CLIENT_START_ENCRYPTION:
257 /* Ok, we now have all the stuff needed to
258 * start encrypting, so lets fire it up :-) */
259 if (!ssl2_enc_init(s,1))
265 s->state=SSL2_ST_SEND_CLIENT_FINISHED_A;
268 case SSL2_ST_SEND_CLIENT_FINISHED_A:
269 case SSL2_ST_SEND_CLIENT_FINISHED_B:
270 ret=client_finished(s);
271 if (ret <= 0) goto end;
273 s->state=SSL2_ST_GET_SERVER_VERIFY_A;
276 case SSL2_ST_GET_SERVER_VERIFY_A:
277 case SSL2_ST_GET_SERVER_VERIFY_B:
278 ret=get_server_verify(s);
279 if (ret <= 0) goto end;
281 s->state=SSL2_ST_GET_SERVER_FINISHED_A;
284 case SSL2_ST_GET_SERVER_FINISHED_A:
285 case SSL2_ST_GET_SERVER_FINISHED_B:
286 ret=get_server_finished(s);
287 if (ret <= 0) goto end;
290 case SSL2_ST_SEND_CLIENT_CERTIFICATE_A:
291 case SSL2_ST_SEND_CLIENT_CERTIFICATE_B:
292 case SSL2_ST_SEND_CLIENT_CERTIFICATE_C:
293 case SSL2_ST_SEND_CLIENT_CERTIFICATE_D:
294 case SSL2_ST_X509_GET_CLIENT_CERTIFICATE:
295 ret=client_certificate(s);
296 if (ret <= 0) goto end;
298 s->state=SSL2_ST_GET_SERVER_FINISHED_A;
302 if (s->init_buf != NULL)
304 BUF_MEM_free(s->init_buf);
308 /* ERR_clear_error();*/
310 /* If we want to cache session-ids in the client
311 * and we successfully add the session-id to the
312 * cache, and there is a callback, then pass it out.
313 * 26/11/96 - eay - only add if not a re-used session.
316 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
317 if (s->hit) s->ctx->stats.sess_hit++;
321 s->ctx->stats.sess_connect_good++;
323 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
328 SSLerr(SSL_F_SSL2_CONNECT,SSL_R_UNKNOWN_STATE);
333 if ((cb != NULL) && (s->state != state))
337 cb(s,SSL_CB_CONNECT_LOOP,1);
346 cb(s,SSL_CB_CONNECT_EXIT,ret);
350 static int get_server_hello(SSL *s)
356 STACK_OF(SSL_CIPHER) *sk=NULL,*cl, *prio, *allow;
358 buf=(unsigned char *)s->init_buf->data;
360 if (s->state == SSL2_ST_GET_SERVER_HELLO_A)
362 i=ssl2_read(s,(char *)&(buf[s->init_num]),11-s->init_num);
363 if (i < (11-s->init_num))
364 return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
367 if (*(p++) != SSL2_MT_SERVER_HELLO)
369 if (p[-1] != SSL2_MT_ERROR)
371 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
372 SSLerr(SSL_F_GET_SERVER_HELLO,
373 SSL_R_READ_WRONG_PACKET_TYPE);
376 SSLerr(SSL_F_GET_SERVER_HELLO,
381 /* The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug
382 * workaround. <appro@fy.chalmers.se> */
383 s->hit=(i=*(p++))?1:0;
387 s->s2->tmp.cert_type= *(p++);
389 if (i < s->version) s->version=i;
390 n2s(p,i); s->s2->tmp.cert_length=i;
391 n2s(p,i); s->s2->tmp.csl=i;
392 n2s(p,i); s->s2->tmp.conn_id_length=i;
393 s->state=SSL2_ST_GET_SERVER_HELLO_B;
396 /* SSL2_ST_GET_SERVER_HELLO_B */
397 len = 11 + (unsigned long)s->s2->tmp.cert_length + (unsigned long)s->s2->tmp.csl + (unsigned long)s->s2->tmp.conn_id_length;
398 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
400 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_MESSAGE_TOO_LONG);
403 j = (int)len - s->init_num;
404 i = ssl2_read(s,(char *)&(buf[s->init_num]),j);
405 if (i != j) return(ssl2_part_read(s,SSL_F_GET_SERVER_HELLO,i));
407 s->msg_callback(0, s->version, 0, buf, (size_t)len, s, s->msg_callback_arg); /* SERVER-HELLO */
409 /* things are looking good */
414 if (s->s2->tmp.cert_length != 0)
416 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_LENGTH_NOT_ZERO);
419 if (s->s2->tmp.cert_type != 0)
422 SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG))
424 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CERT_TYPE_NOT_ZERO);
428 if (s->s2->tmp.csl != 0)
430 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_REUSE_CIPHER_LIST_NOT_ZERO);
438 memset(s->session->session_id,0,
439 SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES);
440 s->session->session_id_length=0;
444 /* we need to do this in case we were trying to reuse a
445 * client session but others are already reusing it.
446 * If this was a new 'blank' session ID, the session-id
447 * length will still be 0 */
448 if (s->session->session_id_length > 0)
450 if (!ssl_get_new_session(s,0))
452 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
457 if (ssl2_set_certificate(s,s->s2->tmp.cert_type,
458 s->s2->tmp.cert_length,p) <= 0)
460 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
463 p+=s->s2->tmp.cert_length;
465 if (s->s2->tmp.csl == 0)
467 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
468 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_LIST);
472 /* We have just received a list of ciphers back from the
473 * server. We need to get the ones that match, then select
474 * the one we want the most :-). */
476 /* load the ciphers */
477 sk=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.csl,
478 &s->session->ciphers);
482 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
483 SSLerr(SSL_F_GET_SERVER_HELLO,ERR_R_MALLOC_FAILURE);
487 sk_SSL_CIPHER_set_cmp_func(sk,ssl_cipher_ptr_id_cmp);
489 /* get the array of ciphers we will accept */
490 cl=SSL_get_ciphers(s);
491 sk_SSL_CIPHER_set_cmp_func(cl,ssl_cipher_ptr_id_cmp);
494 * If server preference flag set, choose the first
495 * (highest priority) cipher the server sends, otherwise
496 * client preference has priority.
498 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
508 /* In theory we could have ciphers sent back that we
509 * don't want to use but that does not matter since we
510 * will check against the list we originally sent and
511 * for performance reasons we should not bother to match
512 * the two lists up just to check. */
513 for (i=0; i<sk_SSL_CIPHER_num(prio); i++)
515 if (sk_SSL_CIPHER_find(allow,
516 sk_SSL_CIPHER_value(prio,i)) >= 0)
520 if (i >= sk_SSL_CIPHER_num(prio))
522 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
523 SSLerr(SSL_F_GET_SERVER_HELLO,SSL_R_NO_CIPHER_MATCH);
526 s->session->cipher=sk_SSL_CIPHER_value(prio,i);
529 if (s->session->peer != NULL) /* can't happen*/
531 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
532 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
536 s->session->peer = s->session->sess_cert->peer_key->x509;
537 /* peer_key->x509 has been set by ssl2_set_certificate. */
538 CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509);
541 if (s->session->peer != s->session->sess_cert->peer_key->x509)
544 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
545 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
549 s->s2->conn_id_length=s->s2->tmp.conn_id_length;
550 if (s->s2->conn_id_length > sizeof s->s2->conn_id)
552 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
553 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG);
556 memcpy(s->s2->conn_id,p,s->s2->tmp.conn_id_length);
560 static int client_hello(SSL *s)
564 /* CIPHER **cipher;*/
567 buf=(unsigned char *)s->init_buf->data;
568 if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A)
570 if ((s->session == NULL) ||
571 (s->session->ssl_version != s->version))
573 if (!ssl_get_new_session(s,0))
575 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
579 /* else use the pre-loaded session */
582 d=p+9; /* data section */
583 *(p++)=SSL2_MT_CLIENT_HELLO; /* type */
584 s2n(SSL2_VERSION,p); /* version */
587 n=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),d);
592 SSLerr(SSL_F_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
596 s2n(n,p); /* cipher spec num bytes */
598 if ((s->session->session_id_length > 0) &&
599 (s->session->session_id_length <=
600 SSL2_MAX_SSL_SESSION_ID_LENGTH))
602 i=s->session->session_id_length;
603 s2n(i,p); /* session id length */
604 memcpy(d,s->session->session_id,(unsigned int)i);
612 s->s2->challenge_length=SSL2_CHALLENGE_LENGTH;
613 s2n(SSL2_CHALLENGE_LENGTH,p); /* challenge length */
614 /*challenge id data*/
615 if(RAND_pseudo_bytes(s->s2->challenge,SSL2_CHALLENGE_LENGTH) <= 0)
617 memcpy(d,s->s2->challenge,SSL2_CHALLENGE_LENGTH);
618 d+=SSL2_CHALLENGE_LENGTH;
620 s->state=SSL2_ST_SEND_CLIENT_HELLO_B;
624 /* SSL2_ST_SEND_CLIENT_HELLO_B */
625 return(ssl2_do_write(s));
628 static int client_master_key(SSL *s)
632 int clear,enc,karg,i;
637 buf=(unsigned char *)s->init_buf->data;
638 if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A)
641 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))
643 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
644 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
650 *(p++)=SSL2_MT_CLIENT_MASTER_KEY;/* type */
652 i=ssl_put_cipher_by_char(s,sess->cipher,p);
655 /* make key_arg data */
656 i=EVP_CIPHER_iv_length(c);
657 sess->key_arg_length=i;
658 if (i > SSL_MAX_KEY_ARG_LENGTH)
660 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
661 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
665 if(RAND_pseudo_bytes(sess->key_arg,i) <= 0)
668 /* make a master key */
669 i=EVP_CIPHER_key_length(c);
670 sess->master_key_length=i;
673 if (i > sizeof sess->master_key)
675 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
676 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
679 if (RAND_bytes(sess->master_key,i) <= 0)
681 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
686 if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
688 else if (SSL_C_IS_EXPORT(sess->cipher))
695 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
696 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_CIPHER_TABLE_SRC_ERROR);
701 memcpy(d,sess->master_key,(unsigned int)clear);
704 enc=ssl_rsa_public_encrypt(sess->sess_cert,enc,
705 &(sess->master_key[clear]),d,
706 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
709 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
710 SSLerr(SSL_F_CLIENT_MASTER_KEY,SSL_R_PUBLIC_KEY_ENCRYPT_ERROR);
714 if (s->options & SSL_OP_PKCS1_CHECK_1) d[1]++;
715 if (s->options & SSL_OP_PKCS1_CHECK_2)
716 sess->master_key[clear]++;
720 karg=sess->key_arg_length;
721 s2n(karg,p); /* key arg size */
722 if (karg > sizeof sess->key_arg)
724 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
725 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
728 memcpy(d,sess->key_arg,(unsigned int)karg);
731 s->state=SSL2_ST_SEND_CLIENT_MASTER_KEY_B;
736 /* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */
737 return(ssl2_do_write(s));
740 static int client_finished(SSL *s)
744 if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A)
746 p=(unsigned char *)s->init_buf->data;
747 *(p++)=SSL2_MT_CLIENT_FINISHED;
748 if (s->s2->conn_id_length > sizeof s->s2->conn_id)
750 SSLerr(SSL_F_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
753 memcpy(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length);
755 s->state=SSL2_ST_SEND_CLIENT_FINISHED_B;
756 s->init_num=s->s2->conn_id_length+1;
759 return(ssl2_do_write(s));
762 /* read the data and then respond */
763 static int client_certificate(SSL *s)
770 unsigned char *cert_ch;
772 buf=(unsigned char *)s->init_buf->data;
774 /* We have a cert associated with the SSL, so attach it to
775 * the session if it does not have one */
777 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A)
779 i=ssl2_read(s,(char *)&(buf[s->init_num]),
780 SSL2_MAX_CERT_CHALLENGE_LENGTH+2-s->init_num);
781 if (i<(SSL2_MIN_CERT_CHALLENGE_LENGTH+2-s->init_num))
782 return(ssl2_part_read(s,SSL_F_CLIENT_CERTIFICATE,i));
785 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* REQUEST-CERTIFICATE */
789 if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
791 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
792 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_AUTHENTICATION_TYPE);
796 if ((s->cert == NULL) ||
797 (s->cert->key->x509 == NULL) ||
798 (s->cert->key->privatekey == NULL))
800 s->state=SSL2_ST_X509_GET_CLIENT_CERTIFICATE;
803 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
807 cert_ch_len = s->init_num - 2;
809 if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE)
814 /* If we get an error we need to
815 * ssl->rwstate=SSL_X509_LOOKUP;
817 * We should then be retried when things are ok and we
818 * can get a cert or not */
821 if (s->ctx->client_cert_cb != NULL)
823 i=s->ctx->client_cert_cb(s,&(x509),&(pkey));
828 s->rwstate=SSL_X509_LOOKUP;
831 s->rwstate=SSL_NOTHING;
833 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
835 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
836 if ( !SSL_use_certificate(s,x509) ||
837 !SSL_use_PrivateKey(s,pkey))
846 if (x509 != NULL) X509_free(x509);
847 if (pkey != NULL) EVP_PKEY_free(pkey);
848 SSLerr(SSL_F_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
854 /* We have no client certificate to respond with
855 * so send the correct error message back */
856 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_B;
858 *(p++)=SSL2_MT_ERROR;
859 s2n(SSL2_PE_NO_CERTIFICATE,p);
862 /* Write is done at the end */
866 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B)
868 return(ssl2_do_write(s));
871 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C)
875 /* ok, now we calculate the checksum
876 * do it first so we can reuse buf :-) */
878 EVP_MD_CTX_init(&ctx);
879 EVP_SignInit_ex(&ctx,s->ctx->rsa_md5, NULL);
880 EVP_SignUpdate(&ctx,s->s2->key_material,
881 s->s2->key_material_length);
882 EVP_SignUpdate(&ctx,cert_ch,(unsigned int)cert_ch_len);
883 n=i2d_X509(s->session->sess_cert->peer_key->x509,&p);
884 EVP_SignUpdate(&ctx,buf,(unsigned int)n);
888 *(p++)=SSL2_MT_CLIENT_CERTIFICATE;
889 *(p++)=SSL2_CT_X509_CERTIFICATE;
890 n=i2d_X509(s->cert->key->x509,&d);
893 if (!EVP_SignFinal(&ctx,d,&n,s->cert->key->privatekey))
895 /* this is not good. If things have failed it
896 * means there so something wrong with the key.
897 * We will continue with a 0 length signature
900 EVP_MD_CTX_cleanup(&ctx);
904 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_D;
908 /* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */
909 return(ssl2_do_write(s));
912 static int get_server_verify(SSL *s)
917 p=(unsigned char *)s->init_buf->data;
918 if (s->state == SSL2_ST_GET_SERVER_VERIFY_A)
920 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
921 if (i < (1-s->init_num))
922 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));
925 s->state= SSL2_ST_GET_SERVER_VERIFY_B;
926 if (*p != SSL2_MT_SERVER_VERIFY)
928 if (p[0] != SSL2_MT_ERROR)
930 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
931 SSLerr(SSL_F_GET_SERVER_VERIFY,
932 SSL_R_READ_WRONG_PACKET_TYPE);
936 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_PEER_ERROR);
937 /* try to read the error message */
938 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
939 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
945 p=(unsigned char *)s->init_buf->data;
946 len = 1 + s->s2->challenge_length;
947 n = len - s->init_num;
948 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
950 return(ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i));
952 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* SERVER-VERIFY */
955 if (memcmp(p,s->s2->challenge,s->s2->challenge_length) != 0)
957 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
958 SSLerr(SSL_F_GET_SERVER_VERIFY,SSL_R_CHALLENGE_IS_DIFFERENT);
964 static int get_server_finished(SSL *s)
970 buf=(unsigned char *)s->init_buf->data;
972 if (s->state == SSL2_ST_GET_SERVER_FINISHED_A)
974 i=ssl2_read(s,(char *)&(buf[s->init_num]),1-s->init_num);
975 if (i < (1-s->init_num))
976 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));
979 if (*p == SSL2_MT_REQUEST_CERTIFICATE)
981 s->state=SSL2_ST_SEND_CLIENT_CERTIFICATE_A;
984 else if (*p != SSL2_MT_SERVER_FINISHED)
986 if (p[0] != SSL2_MT_ERROR)
988 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
989 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
993 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_PEER_ERROR);
994 /* try to read the error message */
995 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
996 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
1000 s->state=SSL2_ST_GET_SERVER_FINISHED_B;
1003 len = 1 + SSL2_SSL_SESSION_ID_LENGTH;
1004 n = len - s->init_num;
1005 i = ssl2_read(s,(char *)&(buf[s->init_num]), n);
1006 if (i < n) /* XXX could be shorter than SSL2_SSL_SESSION_ID_LENGTH, that's the maximum */
1007 return(ssl2_part_read(s,SSL_F_GET_SERVER_FINISHED,i));
1009 if (s->msg_callback)
1010 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s, s->msg_callback_arg); /* SERVER-FINISHED */
1012 if (!s->hit) /* new session */
1014 /* new session-id */
1015 /* Make sure we were not trying to re-use an old SSL_SESSION
1016 * or bad things can happen */
1018 s->session->session_id_length=SSL2_SSL_SESSION_ID_LENGTH;
1019 memcpy(s->session->session_id,p+1,SSL2_SSL_SESSION_ID_LENGTH);
1023 if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG))
1025 if ((s->session->session_id_length > sizeof s->session->session_id)
1026 || (0 != memcmp(buf + 1, s->session->session_id,
1027 (unsigned int)s->session->session_id_length)))
1029 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
1030 SSLerr(SSL_F_GET_SERVER_FINISHED,SSL_R_SSL_SESSION_ID_IS_DIFFERENT);
1035 s->state = SSL_ST_OK;
1039 /* loads in the certificate from the server */
1040 int ssl2_set_certificate(SSL *s, int type, int len, unsigned char *data)
1042 STACK_OF(X509) *sk=NULL;
1043 EVP_PKEY *pkey=NULL;
1049 x509=d2i_X509(NULL,&data,(long)len);
1052 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_X509_LIB);
1056 if ((sk=sk_X509_new_null()) == NULL || !sk_X509_push(sk,x509))
1058 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1062 i=ssl_verify_cert_chain(s,sk);
1064 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i))
1066 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1069 ERR_clear_error(); /* but we keep s->verify_result */
1070 s->session->verify_result = s->verify_result;
1072 /* server's cert for this session */
1073 sc=ssl_sess_cert_new();
1079 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1080 s->session->sess_cert=sc;
1082 sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509=x509;
1083 sc->peer_key= &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]);
1085 pkey=X509_get_pubkey(x509);
1089 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY);
1092 if (pkey->type != EVP_PKEY_RSA)
1094 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,SSL_R_PUBLIC_KEY_NOT_RSA);
1098 if (!ssl_set_peer_cert_type(sc,SSL2_CT_X509_CERTIFICATE))
1104 EVP_PKEY_free(pkey);
1108 static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
1109 unsigned char *to, int padding)
1111 EVP_PKEY *pkey=NULL;
1114 if ((sc == NULL) || (sc->peer_key->x509 == NULL) ||
1115 ((pkey=X509_get_pubkey(sc->peer_key->x509)) == NULL))
1117 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_NO_PUBLICKEY);
1120 if (pkey->type != EVP_PKEY_RSA)
1122 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
1126 /* we have the public key */
1127 i=RSA_public_encrypt(len,from,to,pkey->pkey.rsa,padding);
1129 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT,ERR_R_RSA_LIB);
1131 EVP_PKEY_free(pkey);
1134 #else /* !OPENSSL_NO_SSL2 */
1137 static void *dummy=&dummy;