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,
142 ssl2_connect, ssl2_get_client_method)
144 int ssl2_connect(SSL *s)
146 unsigned long l = (unsigned long)time(NULL);
149 void (*cb) (const SSL *ssl, int type, int val) = NULL;
150 int new_state, state;
152 RAND_add(&l, sizeof(l), 0);
156 if (s->info_callback != NULL)
157 cb = s->info_callback;
158 else if (s->ctx->info_callback != NULL)
159 cb = s->ctx->info_callback;
161 /* init things to blank */
163 if (!SSL_in_init(s) || SSL_in_before(s))
172 case SSL_ST_BEFORE | SSL_ST_CONNECT:
173 case SSL_ST_OK | SSL_ST_CONNECT:
177 cb(s, SSL_CB_HANDSHAKE_START, 1);
179 s->version = SSL2_VERSION;
180 s->type = SSL_ST_CONNECT;
183 if ((buf == NULL) && ((buf = BUF_MEM_new()) == NULL)) {
187 if (!BUF_MEM_grow(buf, SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)) {
188 if (buf == s->init_buf)
196 s->state = SSL2_ST_SEND_CLIENT_HELLO_A;
197 s->ctx->stats.sess_connect++;
198 s->handshake_func = ssl2_connect;
201 case SSL2_ST_SEND_CLIENT_HELLO_A:
202 case SSL2_ST_SEND_CLIENT_HELLO_B:
204 ret = client_hello(s);
208 s->state = SSL2_ST_GET_SERVER_HELLO_A;
211 case SSL2_ST_GET_SERVER_HELLO_A:
212 case SSL2_ST_GET_SERVER_HELLO_B:
213 ret = get_server_hello(s);
217 if (!s->hit) { /* new session */
218 s->state = SSL2_ST_SEND_CLIENT_MASTER_KEY_A;
221 s->state = SSL2_ST_CLIENT_START_ENCRYPTION;
225 case SSL2_ST_SEND_CLIENT_MASTER_KEY_A:
226 case SSL2_ST_SEND_CLIENT_MASTER_KEY_B:
227 ret = client_master_key(s);
231 s->state = SSL2_ST_CLIENT_START_ENCRYPTION;
234 case SSL2_ST_CLIENT_START_ENCRYPTION:
236 * Ok, we now have all the stuff needed to start encrypting, so
237 * lets fire it up :-)
239 if (!ssl2_enc_init(s, 1)) {
243 s->s2->clear_text = 0;
244 s->state = SSL2_ST_SEND_CLIENT_FINISHED_A;
247 case SSL2_ST_SEND_CLIENT_FINISHED_A:
248 case SSL2_ST_SEND_CLIENT_FINISHED_B:
249 ret = client_finished(s);
253 s->state = SSL2_ST_GET_SERVER_VERIFY_A;
256 case SSL2_ST_GET_SERVER_VERIFY_A:
257 case SSL2_ST_GET_SERVER_VERIFY_B:
258 ret = get_server_verify(s);
262 s->state = SSL2_ST_GET_SERVER_FINISHED_A;
265 case SSL2_ST_GET_SERVER_FINISHED_A:
266 case SSL2_ST_GET_SERVER_FINISHED_B:
267 ret = get_server_finished(s);
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);
281 s->state = SSL2_ST_GET_SERVER_FINISHED_A;
285 if (s->init_buf != NULL) {
286 BUF_MEM_free(s->init_buf);
290 /* ERR_clear_error(); */
293 * If we want to cache session-ids in the client and we
294 * successfully add the session-id to the cache, and there is a
295 * callback, then pass it out. 26/11/96 - eay - only add if not a
299 ssl_update_cache(s, SSL_SESS_CACHE_CLIENT);
301 s->ctx->stats.sess_hit++;
305 s->ctx->stats.sess_connect_good++;
308 cb(s, SSL_CB_HANDSHAKE_DONE, 1);
313 SSLerr(SSL_F_SSL2_CONNECT, SSL_R_UNKNOWN_STATE);
318 if ((cb != NULL) && (s->state != state)) {
319 new_state = s->state;
321 cb(s, SSL_CB_CONNECT_LOOP, 1);
322 s->state = new_state;
330 cb(s, SSL_CB_CONNECT_EXIT, ret);
334 static int get_server_hello(SSL *s)
340 STACK_OF(SSL_CIPHER) *sk = NULL, *cl, *prio, *allow;
342 buf = (unsigned char *)s->init_buf->data;
344 if (s->state == SSL2_ST_GET_SERVER_HELLO_A) {
345 i = ssl2_read(s, (char *)&(buf[s->init_num]), 11 - s->init_num);
346 if (i < (11 - s->init_num))
347 return (ssl2_part_read(s, SSL_F_GET_SERVER_HELLO, i));
350 if (*(p++) != SSL2_MT_SERVER_HELLO) {
351 if (p[-1] != SSL2_MT_ERROR) {
352 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
353 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_READ_WRONG_PACKET_TYPE);
355 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_PEER_ERROR);
360 * The Rhapsody 5.5 (a.k.a. MacOS X) compiler bug workaround.
361 * <appro@fy.chalmers.se>
363 s->hit = (i = *(p++)) ? 1 : 0;
365 s->hit = (*(p++)) ? 1 : 0;
367 s->s2->tmp.cert_type = *(p++);
372 s->s2->tmp.cert_length = i;
376 s->s2->tmp.conn_id_length = i;
377 s->state = SSL2_ST_GET_SERVER_HELLO_B;
380 /* SSL2_ST_GET_SERVER_HELLO_B */
382 11 + (unsigned long)s->s2->tmp.cert_length +
383 (unsigned long)s->s2->tmp.csl +
384 (unsigned long)s->s2->tmp.conn_id_length;
385 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER) {
386 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_MESSAGE_TOO_LONG);
389 j = (int)len - s->init_num;
390 i = ssl2_read(s, (char *)&(buf[s->init_num]), j);
392 return (ssl2_part_read(s, SSL_F_GET_SERVER_HELLO, i));
393 if (s->msg_callback) {
395 s->msg_callback(0, s->version, 0, buf, (size_t)len, s,
396 s->msg_callback_arg);
399 /* things are looking good */
403 if (s->s2->tmp.cert_length != 0) {
404 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_REUSE_CERT_LENGTH_NOT_ZERO);
407 if (s->s2->tmp.cert_type != 0) {
408 if (!(s->options & SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG)) {
409 SSLerr(SSL_F_GET_SERVER_HELLO,
410 SSL_R_REUSE_CERT_TYPE_NOT_ZERO);
414 if (s->s2->tmp.csl != 0) {
415 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_REUSE_CIPHER_LIST_NOT_ZERO);
421 memset(s->session->session_id, 0,
422 SSL_MAX_SSL_SESSION_ID_LENGTH_IN_BYTES);
423 s->session->session_id_length = 0;
427 * we need to do this in case we were trying to reuse a client
428 * session but others are already reusing it. If this was a new
429 * 'blank' session ID, the session-id length will still be 0
431 if (s->session->session_id_length > 0) {
432 if (!ssl_get_new_session(s, 0)) {
433 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
438 if (ssl2_set_certificate(s, s->s2->tmp.cert_type,
439 s->s2->tmp.cert_length, p) <= 0) {
440 ssl2_return_error(s, SSL2_PE_BAD_CERTIFICATE);
443 p += s->s2->tmp.cert_length;
445 if (s->s2->tmp.csl == 0) {
446 ssl2_return_error(s, SSL2_PE_NO_CIPHER);
447 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_NO_CIPHER_LIST);
452 * We have just received a list of ciphers back from the server. We
453 * need to get the ones that match, then select the one we want the
457 /* load the ciphers */
458 sk = ssl_bytes_to_cipher_list(s, p, s->s2->tmp.csl,
459 &s->session->ciphers);
462 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
463 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_MALLOC_FAILURE);
467 (void)sk_SSL_CIPHER_set_cmp_func(sk, ssl_cipher_ptr_id_cmp);
469 /* get the array of ciphers we will accept */
470 cl = SSL_get_ciphers(s);
471 (void)sk_SSL_CIPHER_set_cmp_func(cl, ssl_cipher_ptr_id_cmp);
474 * If server preference flag set, choose the first
475 * (highest priority) cipher the server sends, otherwise
476 * client preference has priority.
478 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) {
486 * In theory we could have ciphers sent back that we don't want to
487 * use but that does not matter since we will check against the list
488 * we originally sent and for performance reasons we should not
489 * bother to match the two lists up just to check.
491 for (i = 0; i < sk_SSL_CIPHER_num(prio); i++) {
492 if (sk_SSL_CIPHER_find(allow, sk_SSL_CIPHER_value(prio, i)) >= 0)
496 if (i >= sk_SSL_CIPHER_num(prio)) {
497 ssl2_return_error(s, SSL2_PE_NO_CIPHER);
498 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_NO_CIPHER_MATCH);
501 s->session->cipher = sk_SSL_CIPHER_value(prio, i);
503 if (s->session->peer != NULL) { /* can't happen */
504 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
505 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
509 s->session->peer = s->session->sess_cert->peer_key->x509;
510 /* peer_key->x509 has been set by ssl2_set_certificate. */
511 CRYPTO_add(&s->session->peer->references, 1, CRYPTO_LOCK_X509);
514 if (s->session->sess_cert == NULL
515 || s->session->peer != s->session->sess_cert->peer_key->x509)
518 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
519 SSLerr(SSL_F_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
523 s->s2->conn_id_length = s->s2->tmp.conn_id_length;
524 if (s->s2->conn_id_length > sizeof s->s2->conn_id) {
525 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
526 SSLerr(SSL_F_GET_SERVER_HELLO, SSL_R_SSL2_CONNECTION_ID_TOO_LONG);
529 memcpy(s->s2->conn_id, p, s->s2->tmp.conn_id_length);
533 static int client_hello(SSL *s)
536 unsigned char *p, *d;
537 /* CIPHER **cipher;*/
540 buf = (unsigned char *)s->init_buf->data;
541 if (s->state == SSL2_ST_SEND_CLIENT_HELLO_A) {
542 if ((s->session == NULL) || (s->session->ssl_version != s->version)) {
543 if (!ssl_get_new_session(s, 0)) {
544 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
548 /* else use the pre-loaded session */
550 p = buf; /* header */
551 d = p + 9; /* data section */
552 *(p++) = SSL2_MT_CLIENT_HELLO; /* type */
553 s2n(SSL2_VERSION, p); /* version */
556 n = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), d, 0);
560 SSLerr(SSL_F_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
564 s2n(n, p); /* cipher spec num bytes */
566 if ((s->session->session_id_length > 0) &&
567 (s->session->session_id_length <=
568 SSL2_MAX_SSL_SESSION_ID_LENGTH)) {
569 i = s->session->session_id_length;
570 s2n(i, p); /* session id length */
571 memcpy(d, s->session->session_id, (unsigned int)i);
577 s->s2->challenge_length = SSL2_CHALLENGE_LENGTH;
578 s2n(SSL2_CHALLENGE_LENGTH, p); /* challenge length */
582 if (RAND_pseudo_bytes(s->s2->challenge, SSL2_CHALLENGE_LENGTH) <= 0)
584 memcpy(d, s->s2->challenge, SSL2_CHALLENGE_LENGTH);
585 d += SSL2_CHALLENGE_LENGTH;
587 s->state = SSL2_ST_SEND_CLIENT_HELLO_B;
588 s->init_num = d - buf;
591 /* SSL2_ST_SEND_CLIENT_HELLO_B */
592 return (ssl2_do_write(s));
595 static int client_master_key(SSL *s)
598 unsigned char *p, *d;
599 int clear, enc, karg, i;
604 buf = (unsigned char *)s->init_buf->data;
605 if (s->state == SSL2_ST_SEND_CLIENT_MASTER_KEY_A) {
607 if (!ssl_cipher_get_evp(s->session, &c, &md, NULL)) {
608 ssl2_return_error(s, SSL2_PE_NO_CIPHER);
609 SSLerr(SSL_F_CLIENT_MASTER_KEY,
610 SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
616 *(p++) = SSL2_MT_CLIENT_MASTER_KEY; /* type */
618 i = ssl_put_cipher_by_char(s, sess->cipher, p);
621 /* make key_arg data */
622 i = EVP_CIPHER_iv_length(c);
623 sess->key_arg_length = i;
624 if (i > SSL_MAX_KEY_ARG_LENGTH) {
625 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
626 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
630 if (RAND_pseudo_bytes(sess->key_arg, i) <= 0)
633 /* make a master key */
634 i = EVP_CIPHER_key_length(c);
635 sess->master_key_length = i;
637 if (i > (int)sizeof(sess->master_key)) {
638 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
639 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
642 if (RAND_bytes(sess->master_key, i) <= 0) {
643 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
648 if (sess->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
650 else if (SSL_C_IS_EXPORT(sess->cipher))
656 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
657 SSLerr(SSL_F_CLIENT_MASTER_KEY, SSL_R_CIPHER_TABLE_SRC_ERROR);
662 memcpy(d, sess->master_key, (unsigned int)clear);
665 enc = ssl_rsa_public_encrypt(sess->sess_cert, enc,
666 &(sess->master_key[clear]), d,
668 s2->ssl2_rollback) ? RSA_SSLV23_PADDING
669 : RSA_PKCS1_PADDING);
671 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
672 SSLerr(SSL_F_CLIENT_MASTER_KEY, SSL_R_PUBLIC_KEY_ENCRYPT_ERROR);
676 if (s->options & SSL_OP_PKCS1_CHECK_1)
678 if (s->options & SSL_OP_PKCS1_CHECK_2)
679 sess->master_key[clear]++;
683 karg = sess->key_arg_length;
684 s2n(karg, p); /* key arg size */
685 if (karg > (int)sizeof(sess->key_arg)) {
686 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
687 SSLerr(SSL_F_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
690 memcpy(d, sess->key_arg, (unsigned int)karg);
693 s->state = SSL2_ST_SEND_CLIENT_MASTER_KEY_B;
694 s->init_num = d - buf;
698 /* SSL2_ST_SEND_CLIENT_MASTER_KEY_B */
699 return (ssl2_do_write(s));
702 static int client_finished(SSL *s)
706 if (s->state == SSL2_ST_SEND_CLIENT_FINISHED_A) {
707 p = (unsigned char *)s->init_buf->data;
708 *(p++) = SSL2_MT_CLIENT_FINISHED;
709 if (s->s2->conn_id_length > sizeof s->s2->conn_id) {
710 SSLerr(SSL_F_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
713 memcpy(p, s->s2->conn_id, (unsigned int)s->s2->conn_id_length);
715 s->state = SSL2_ST_SEND_CLIENT_FINISHED_B;
716 s->init_num = s->s2->conn_id_length + 1;
719 return (ssl2_do_write(s));
722 /* read the data and then respond */
723 static int client_certificate(SSL *s)
726 unsigned char *p, *d;
730 unsigned char *cert_ch;
732 buf = (unsigned char *)s->init_buf->data;
735 * We have a cert associated with the SSL, so attach it to the session if
736 * it does not have one
739 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_A) {
740 i = ssl2_read(s, (char *)&(buf[s->init_num]),
741 SSL2_MAX_CERT_CHALLENGE_LENGTH + 2 - s->init_num);
742 if (i < (SSL2_MIN_CERT_CHALLENGE_LENGTH + 2 - s->init_num))
743 return (ssl2_part_read(s, SSL_F_CLIENT_CERTIFICATE, i));
745 if (s->msg_callback) {
746 /* REQUEST-CERTIFICATE */
747 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s,
748 s->msg_callback_arg);
753 if (buf[1] != SSL2_AT_MD5_WITH_RSA_ENCRYPTION) {
754 ssl2_return_error(s, SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
755 SSLerr(SSL_F_CLIENT_CERTIFICATE, SSL_R_BAD_AUTHENTICATION_TYPE);
759 if ((s->cert == NULL) ||
760 (s->cert->key->x509 == NULL) ||
761 (s->cert->key->privatekey == NULL)) {
762 s->state = SSL2_ST_X509_GET_CLIENT_CERTIFICATE;
764 s->state = SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
768 cert_ch_len = s->init_num - 2;
770 if (s->state == SSL2_ST_X509_GET_CLIENT_CERTIFICATE) {
772 EVP_PKEY *pkey = NULL;
775 * If we get an error we need to ssl->rwstate=SSL_X509_LOOKUP;
776 * return(error); We should then be retried when things are ok and we
777 * can get a cert or not
781 if (s->ctx->client_cert_cb != NULL) {
782 i = s->ctx->client_cert_cb(s, &(x509), &(pkey));
786 s->rwstate = SSL_X509_LOOKUP;
789 s->rwstate = SSL_NOTHING;
791 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
792 s->state = SSL2_ST_SEND_CLIENT_CERTIFICATE_C;
793 if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) {
803 SSLerr(SSL_F_CLIENT_CERTIFICATE,
804 SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
810 * We have no client certificate to respond with so send the
811 * correct error message back
813 s->state = SSL2_ST_SEND_CLIENT_CERTIFICATE_B;
815 *(p++) = SSL2_MT_ERROR;
816 s2n(SSL2_PE_NO_CERTIFICATE, p);
819 /* Write is done at the end */
823 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_B) {
824 return (ssl2_do_write(s));
827 if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_C) {
831 * ok, now we calculate the checksum do it first so we can reuse buf
835 EVP_MD_CTX_init(&ctx);
836 EVP_SignInit_ex(&ctx, s->ctx->rsa_md5, NULL);
837 EVP_SignUpdate(&ctx, s->s2->key_material, s->s2->key_material_length);
838 EVP_SignUpdate(&ctx, cert_ch, (unsigned int)cert_ch_len);
839 n = i2d_X509(s->session->sess_cert->peer_key->x509, &p);
840 EVP_SignUpdate(&ctx, buf, (unsigned int)n);
844 *(p++) = SSL2_MT_CLIENT_CERTIFICATE;
845 *(p++) = SSL2_CT_X509_CERTIFICATE;
846 n = i2d_X509(s->cert->key->x509, &d);
849 if (!EVP_SignFinal(&ctx, d, &n, s->cert->key->privatekey)) {
851 * this is not good. If things have failed it means there so
852 * something wrong with the key. We will continue with a 0 length
856 EVP_MD_CTX_cleanup(&ctx);
860 s->state = SSL2_ST_SEND_CLIENT_CERTIFICATE_D;
861 s->init_num = d - buf;
864 /* if (s->state == SSL2_ST_SEND_CLIENT_CERTIFICATE_D) */
865 return (ssl2_do_write(s));
868 static int get_server_verify(SSL *s)
873 p = (unsigned char *)s->init_buf->data;
874 if (s->state == SSL2_ST_GET_SERVER_VERIFY_A) {
875 i = ssl2_read(s, (char *)&(p[s->init_num]), 1 - s->init_num);
876 if (i < (1 - s->init_num))
877 return (ssl2_part_read(s, SSL_F_GET_SERVER_VERIFY, i));
880 s->state = SSL2_ST_GET_SERVER_VERIFY_B;
881 if (*p != SSL2_MT_SERVER_VERIFY) {
882 if (p[0] != SSL2_MT_ERROR) {
883 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
884 SSLerr(SSL_F_GET_SERVER_VERIFY, SSL_R_READ_WRONG_PACKET_TYPE);
886 SSLerr(SSL_F_GET_SERVER_VERIFY, SSL_R_PEER_ERROR);
887 /* try to read the error message */
888 i = ssl2_read(s, (char *)&(p[s->init_num]), 3 - s->init_num);
889 return ssl2_part_read(s, SSL_F_GET_SERVER_VERIFY, i);
895 p = (unsigned char *)s->init_buf->data;
896 len = 1 + s->s2->challenge_length;
897 n = len - s->init_num;
898 i = ssl2_read(s, (char *)&(p[s->init_num]), n);
900 return (ssl2_part_read(s, SSL_F_GET_SERVER_VERIFY, i));
901 if (s->msg_callback) {
903 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg);
907 if (CRYPTO_memcmp(p, s->s2->challenge, s->s2->challenge_length) != 0) {
908 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
909 SSLerr(SSL_F_GET_SERVER_VERIFY, SSL_R_CHALLENGE_IS_DIFFERENT);
915 static int get_server_finished(SSL *s)
921 buf = (unsigned char *)s->init_buf->data;
923 if (s->state == SSL2_ST_GET_SERVER_FINISHED_A) {
924 i = ssl2_read(s, (char *)&(buf[s->init_num]), 1 - s->init_num);
925 if (i < (1 - s->init_num))
926 return (ssl2_part_read(s, SSL_F_GET_SERVER_FINISHED, i));
929 if (*p == SSL2_MT_REQUEST_CERTIFICATE) {
930 s->state = SSL2_ST_SEND_CLIENT_CERTIFICATE_A;
932 } else if (*p != SSL2_MT_SERVER_FINISHED) {
933 if (p[0] != SSL2_MT_ERROR) {
934 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
935 SSLerr(SSL_F_GET_SERVER_FINISHED,
936 SSL_R_READ_WRONG_PACKET_TYPE);
938 SSLerr(SSL_F_GET_SERVER_FINISHED, SSL_R_PEER_ERROR);
939 /* try to read the error message */
940 i = ssl2_read(s, (char *)&(p[s->init_num]), 3 - s->init_num);
941 return ssl2_part_read(s, SSL_F_GET_SERVER_VERIFY, i);
945 s->state = SSL2_ST_GET_SERVER_FINISHED_B;
948 len = 1 + SSL2_SSL_SESSION_ID_LENGTH;
949 n = len - s->init_num;
950 i = ssl2_read(s, (char *)&(buf[s->init_num]), n);
953 * XXX could be shorter than SSL2_SSL_SESSION_ID_LENGTH,
956 return (ssl2_part_read(s, SSL_F_GET_SERVER_FINISHED, i));
959 if (s->msg_callback) {
960 /* SERVER-FINISHED */
961 s->msg_callback(0, s->version, 0, buf, (size_t)s->init_num, s,
962 s->msg_callback_arg);
965 if (!s->hit) { /* new session */
968 * Make sure we were not trying to re-use an old SSL_SESSION or bad
972 s->session->session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
973 memcpy(s->session->session_id, p + 1, SSL2_SSL_SESSION_ID_LENGTH);
975 if (!(s->options & SSL_OP_MICROSOFT_SESS_ID_BUG)) {
976 if ((s->session->session_id_length >
977 sizeof s->session->session_id)
979 memcmp(buf + 1, s->session->session_id,
980 (unsigned int)s->session->session_id_length))) {
981 ssl2_return_error(s, SSL2_PE_UNDEFINED_ERROR);
982 SSLerr(SSL_F_GET_SERVER_FINISHED,
983 SSL_R_SSL_SESSION_ID_IS_DIFFERENT);
988 s->state = SSL_ST_OK;
992 /* loads in the certificate from the server */
993 int ssl2_set_certificate(SSL *s, int type, int len, const unsigned char *data)
995 STACK_OF(X509) *sk = NULL;
996 EVP_PKEY *pkey = NULL;
997 SESS_CERT *sc = NULL;
1002 x509 = d2i_X509(NULL, &data, (long)len);
1004 SSLerr(SSL_F_SSL2_SET_CERTIFICATE, ERR_R_X509_LIB);
1008 if ((sk = sk_X509_new_null()) == NULL || !sk_X509_push(sk, x509)) {
1009 SSLerr(SSL_F_SSL2_SET_CERTIFICATE, ERR_R_MALLOC_FAILURE);
1013 i = ssl_verify_cert_chain(s, sk);
1015 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)) {
1016 SSLerr(SSL_F_SSL2_SET_CERTIFICATE, SSL_R_CERTIFICATE_VERIFY_FAILED);
1019 ERR_clear_error(); /* but we keep s->verify_result */
1020 s->session->verify_result = s->verify_result;
1022 /* server's cert for this session */
1023 sc = ssl_sess_cert_new();
1028 if (s->session->sess_cert)
1029 ssl_sess_cert_free(s->session->sess_cert);
1030 s->session->sess_cert = sc;
1032 sc->peer_pkeys[SSL_PKEY_RSA_ENC].x509 = x509;
1033 sc->peer_key = &(sc->peer_pkeys[SSL_PKEY_RSA_ENC]);
1035 pkey = X509_get_pubkey(x509);
1038 SSLerr(SSL_F_SSL2_SET_CERTIFICATE,
1039 SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY);
1042 if (pkey->type != EVP_PKEY_RSA) {
1043 SSLerr(SSL_F_SSL2_SET_CERTIFICATE, SSL_R_PUBLIC_KEY_NOT_RSA);
1047 if (!ssl_set_peer_cert_type(sc, SSL2_CT_X509_CERTIFICATE))
1053 EVP_PKEY_free(pkey);
1057 static int ssl_rsa_public_encrypt(SESS_CERT *sc, int len, unsigned char *from,
1058 unsigned char *to, int padding)
1060 EVP_PKEY *pkey = NULL;
1063 if ((sc == NULL) || (sc->peer_key->x509 == NULL) ||
1064 ((pkey = X509_get_pubkey(sc->peer_key->x509)) == NULL)) {
1065 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT, SSL_R_NO_PUBLICKEY);
1068 if (pkey->type != EVP_PKEY_RSA) {
1069 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT, SSL_R_PUBLIC_KEY_IS_NOT_RSA);
1073 /* we have the public key */
1074 i = RSA_public_encrypt(len, from, to, pkey->pkey.rsa, padding);
1076 SSLerr(SSL_F_SSL_RSA_PUBLIC_ENCRYPT, ERR_R_RSA_LIB);
1078 EVP_PKEY_free(pkey);
1081 #else /* !OPENSSL_NO_SSL2 */
1084 static void *dummy = &dummy;