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/bio.h>
116 #include <openssl/rand.h>
117 #include <openssl/objects.h>
118 #include <openssl/evp.h>
119 #include "cryptlib.h"
121 static SSL_METHOD *ssl2_get_server_method(int ver);
122 static int get_client_master_key(SSL *s);
123 static int get_client_hello(SSL *s);
124 static int server_hello(SSL *s);
125 static int get_client_finished(SSL *s);
126 static int server_verify(SSL *s);
127 static int server_finish(SSL *s);
128 static int request_certificate(SSL *s);
129 static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
130 unsigned char *to,int padding);
133 static SSL_METHOD *ssl2_get_server_method(int ver)
135 if (ver == SSL2_VERSION)
136 return(SSLv2_server_method());
141 SSL_METHOD *SSLv2_server_method(void)
144 static SSL_METHOD SSLv2_server_data;
148 CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);
152 memcpy((char *)&SSLv2_server_data,(char *)sslv2_base_method(),
154 SSLv2_server_data.ssl_accept=ssl2_accept;
155 SSLv2_server_data.get_ssl_method=ssl2_get_server_method;
159 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
161 return(&SSLv2_server_data);
164 int ssl2_accept(SSL *s)
166 unsigned long l=time(NULL);
170 void (*cb)(const SSL *ssl,int type,int val)=NULL;
173 RAND_add(&l,sizeof(l),0);
177 if (s->info_callback != NULL)
179 else if (s->ctx->info_callback != NULL)
180 cb=s->ctx->info_callback;
182 /* init things to blank */
184 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
188 SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
201 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
202 case SSL_ST_OK|SSL_ST_ACCEPT:
205 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
207 s->version=SSL2_VERSION;
208 s->type=SSL_ST_ACCEPT;
211 if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
212 { ret= -1; goto end; }
213 if (!BUF_MEM_grow(buf,(int)
214 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
215 { ret= -1; goto end; }
218 s->ctx->stats.sess_accept++;
219 s->handshake_func=ssl2_accept;
220 s->state=SSL2_ST_GET_CLIENT_HELLO_A;
223 case SSL2_ST_GET_CLIENT_HELLO_A:
224 case SSL2_ST_GET_CLIENT_HELLO_B:
225 case SSL2_ST_GET_CLIENT_HELLO_C:
227 ret=get_client_hello(s);
228 if (ret <= 0) goto end;
230 s->state=SSL2_ST_SEND_SERVER_HELLO_A;
233 case SSL2_ST_SEND_SERVER_HELLO_A:
234 case SSL2_ST_SEND_SERVER_HELLO_B:
236 if (ret <= 0) goto end;
240 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_A;
245 s->state=SSL2_ST_SERVER_START_ENCRYPTION;
248 case SSL2_ST_GET_CLIENT_MASTER_KEY_A:
249 case SSL2_ST_GET_CLIENT_MASTER_KEY_B:
250 ret=get_client_master_key(s);
251 if (ret <= 0) goto end;
253 s->state=SSL2_ST_SERVER_START_ENCRYPTION;
256 case SSL2_ST_SERVER_START_ENCRYPTION:
257 /* Ok we how have sent all the stuff needed to
258 * start encrypting, the next packet back will
260 if (!ssl2_enc_init(s,0))
261 { ret= -1; goto end; }
263 s->state=SSL2_ST_SEND_SERVER_VERIFY_A;
266 case SSL2_ST_SEND_SERVER_VERIFY_A:
267 case SSL2_ST_SEND_SERVER_VERIFY_B:
268 ret=server_verify(s);
269 if (ret <= 0) goto end;
273 /* If we are in here, we have been
274 * buffering the output, so we need to
275 * flush it and remove buffering from
277 s->state=SSL2_ST_SEND_SERVER_VERIFY_C;
282 s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
286 case SSL2_ST_SEND_SERVER_VERIFY_C:
287 /* get the number of bytes to write */
288 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
291 s->rwstate=SSL_WRITING;
292 num1=BIO_flush(s->wbio);
293 if (num1 <= 0) { ret= -1; goto end; }
294 s->rwstate=SSL_NOTHING;
297 /* flushed and now remove buffering */
298 s->wbio=BIO_pop(s->wbio);
300 s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
303 case SSL2_ST_GET_CLIENT_FINISHED_A:
304 case SSL2_ST_GET_CLIENT_FINISHED_B:
305 ret=get_client_finished(s);
309 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_A;
312 case SSL2_ST_SEND_REQUEST_CERTIFICATE_A:
313 case SSL2_ST_SEND_REQUEST_CERTIFICATE_B:
314 case SSL2_ST_SEND_REQUEST_CERTIFICATE_C:
315 case SSL2_ST_SEND_REQUEST_CERTIFICATE_D:
316 /* don't do a 'request certificate' if we
317 * don't want to, or we already have one, and
318 * we only want to do it once. */
319 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
320 ((s->session->peer != NULL) &&
321 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
323 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
328 ret=request_certificate(s);
329 if (ret <= 0) goto end;
331 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
335 case SSL2_ST_SEND_SERVER_FINISHED_A:
336 case SSL2_ST_SEND_SERVER_FINISHED_B:
337 ret=server_finish(s);
338 if (ret <= 0) goto end;
344 BUF_MEM_free(s->init_buf);
345 ssl_free_wbio_buffer(s);
348 /* ERR_clear_error();*/
350 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
352 s->ctx->stats.sess_accept_good++;
356 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
362 SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_UNKNOWN_STATE);
368 if ((cb != NULL) && (s->state != state))
372 cb(s,SSL_CB_ACCEPT_LOOP,1);
379 cb(s,SSL_CB_ACCEPT_EXIT,ret);
383 static int get_client_master_key(SSL *s)
385 int is_export,i,n,keya,ek;
392 p=(unsigned char *)s->init_buf->data;
393 if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A)
395 i=ssl2_read(s,(char *)&(p[s->init_num]),10-s->init_num);
397 if (i < (10-s->init_num))
398 return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
401 if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY)
403 if (p[-1] != SSL2_MT_ERROR)
405 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
406 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_READ_WRONG_PACKET_TYPE);
409 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_PEER_ERROR);
413 cp=ssl2_get_cipher_by_char(p);
416 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
417 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_CIPHER_MATCH);
420 s->session->cipher= cp;
423 n2s(p,i); s->s2->tmp.clear=i;
424 n2s(p,i); s->s2->tmp.enc=i;
425 n2s(p,i); s->session->key_arg_length=i;
426 if(s->session->key_arg_length > SSL_MAX_KEY_ARG_LENGTH)
428 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
429 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_KEY_ARG_TOO_LONG);
432 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B;
435 /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */
436 p=(unsigned char *)s->init_buf->data;
437 if (s->init_buf->length < SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
439 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
440 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
443 keya=s->session->key_arg_length;
444 len = 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc + (unsigned long)keya;
445 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
447 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
448 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG);
451 n = (int)len - s->init_num;
452 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
453 if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
455 s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-MASTER-KEY */
458 memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]),
461 if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)
463 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
464 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY);
467 i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc,
468 &(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]),
469 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
471 is_export=SSL_C_IS_EXPORT(s->session->cipher);
473 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))
475 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
476 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
480 if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
490 /* If a bad decrypt, continue with protocol but with a
491 * random master secret (Bleichenbacher attack) */
493 ((!is_export && (i != EVP_CIPHER_key_length(c)))
494 || (is_export && ((i != ek) || (s->s2->tmp.clear+(unsigned int)i !=
495 (unsigned int)EVP_CIPHER_key_length(c))))))
501 i=EVP_CIPHER_key_length(c);
502 RAND_pseudo_bytes(p,i);
508 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT);
510 /* incorrect number of key bytes for non export cipher */
511 else if ((!is_export && (i != EVP_CIPHER_key_length(c)))
512 || (is_export && ((i != ek) || (s->s2->tmp.clear+i !=
513 EVP_CIPHER_key_length(c)))))
516 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS);
520 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
525 if (is_export) i+=s->s2->tmp.clear;
527 if (i > SSL_MAX_MASTER_KEY_LENGTH)
529 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
530 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
533 s->session->master_key_length=i;
534 memcpy(s->session->master_key,p,(unsigned int)i);
538 static int get_client_hello(SSL *s)
543 STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */
544 STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */
545 STACK_OF(SSL_CIPHER) *prio, *allow;
548 /* This is a bit of a hack to check for the correct packet
549 * type the first time round. */
550 if (s->state == SSL2_ST_GET_CLIENT_HELLO_A)
553 s->state=SSL2_ST_GET_CLIENT_HELLO_B;
556 p=(unsigned char *)s->init_buf->data;
557 if (s->state == SSL2_ST_GET_CLIENT_HELLO_B)
559 i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num);
560 if (i < (9-s->init_num))
561 return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
564 if (*(p++) != SSL2_MT_CLIENT_HELLO)
566 if (p[-1] != SSL2_MT_ERROR)
568 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
569 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE);
572 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR);
576 if (i < s->version) s->version=i;
577 n2s(p,i); s->s2->tmp.cipher_spec_length=i;
578 n2s(p,i); s->s2->tmp.session_id_length=i;
579 n2s(p,i); s->s2->challenge_length=i;
580 if ( (i < SSL2_MIN_CHALLENGE_LENGTH) ||
581 (i > SSL2_MAX_CHALLENGE_LENGTH))
583 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
584 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH);
587 s->state=SSL2_ST_GET_CLIENT_HELLO_C;
590 /* SSL2_ST_GET_CLIENT_HELLO_C */
591 p=(unsigned char *)s->init_buf->data;
592 len = 9 + (unsigned long)s->s2->tmp.cipher_spec_length + (unsigned long)s->s2->challenge_length + (unsigned long)s->s2->tmp.session_id_length;
593 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
595 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
596 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_MESSAGE_TOO_LONG);
599 n = (int)len - s->init_num;
600 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
601 if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
603 s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-HELLO */
606 /* get session-id before cipher stuff so we can get out session
607 * structure if it is cached */
609 if ((s->s2->tmp.session_id_length != 0) &&
610 (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH))
612 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
613 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH);
617 if (s->s2->tmp.session_id_length == 0)
619 if (!ssl_get_new_session(s,1))
621 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
627 i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]),
628 s->s2->tmp.session_id_length);
630 { /* previous session */
635 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
642 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
643 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET);
647 if (!ssl_get_new_session(s,1))
649 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
657 cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length,
658 &s->session->ciphers);
659 if (cs == NULL) goto mem_err;
661 cl=SSL_get_ciphers(s);
663 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
665 prio=sk_SSL_CIPHER_dup(cl);
666 if (prio == NULL) goto mem_err;
674 for (z=0; z<sk_SSL_CIPHER_num(prio); z++)
676 if (sk_SSL_CIPHER_find(allow,sk_SSL_CIPHER_value(prio,z)) < 0)
678 sk_SSL_CIPHER_delete(prio,z);
682 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
684 sk_SSL_CIPHER_free(s->session->ciphers);
685 s->session->ciphers = prio;
687 /* s->session->ciphers should now have a list of
688 * ciphers that are on both the client and server.
689 * This list is ordered by the order the client sent
690 * the ciphers or in the order of the server's preference
691 * if SSL_OP_CIPHER_SERVER_PREFERENCE was set.
694 p+=s->s2->tmp.cipher_spec_length;
695 /* done cipher selection */
697 /* session id extracted already */
698 p+=s->s2->tmp.session_id_length;
701 if (s->s2->challenge_length > sizeof s->s2->challenge)
703 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
704 SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
707 memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length);
710 SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
714 static int server_hello(SSL *s)
718 STACK_OF(SSL_CIPHER) *sk;
720 p=(unsigned char *)s->init_buf->data;
721 if (s->state == SSL2_ST_SEND_SERVER_HELLO_A)
724 *(p++)=SSL2_MT_SERVER_HELLO; /* type */
726 *(p++)=(unsigned char)hit;
730 if (s->session->sess_cert != NULL)
731 /* This can't really happen because get_client_hello
732 * has called ssl_get_new_session, which does not set
734 ssl_sess_cert_free(s->session->sess_cert);
735 s->session->sess_cert = ssl_sess_cert_new();
736 if (s->session->sess_cert == NULL)
738 SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE);
742 /* If 'hit' is set, then s->sess_cert may be non-NULL or NULL,
743 * depending on whether it survived in the internal cache
744 * or was retrieved from an external cache.
745 * If it is NULL, we cannot put any useful data in it anyway,
746 * so we don't touch it.
749 #else /* That's what used to be done when cert_st and sess_cert_st were
752 { /* else add cert to session */
753 CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
754 if (s->session->sess_cert != NULL)
755 ssl_cert_free(s->session->sess_cert);
756 s->session->sess_cert=s->cert;
758 else /* We have a session id-cache hit, if the
759 * session-id has no certificate listed against
760 * the 'cert' structure, grab the 'old' one
761 * listed against the SSL connection */
763 if (s->session->sess_cert == NULL)
765 CRYPTO_add(&s->cert->references,1,
766 CRYPTO_LOCK_SSL_CERT);
767 s->session->sess_cert=s->cert;
774 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
775 SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED);
781 *(p++)=0; /* no certificate type */
782 s2n(s->version,p); /* version */
783 s2n(0,p); /* cert len */
784 s2n(0,p); /* ciphers len */
789 /* put certificate type */
790 *(p++)=SSL2_CT_X509_CERTIFICATE;
791 s2n(s->version,p); /* version */
792 n=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
793 s2n(n,p); /* certificate length */
794 i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&d);
797 /* lets send out the ciphers we like in the
799 sk= s->session->ciphers;
800 n=ssl_cipher_list_to_bytes(s,s->session->ciphers,d);
802 s2n(n,p); /* add cipher length */
805 /* make and send conn_id */
806 s2n(SSL2_CONNECTION_ID_LENGTH,p); /* add conn_id length */
807 s->s2->conn_id_length=SSL2_CONNECTION_ID_LENGTH;
808 RAND_pseudo_bytes(s->s2->conn_id,(int)s->s2->conn_id_length);
809 memcpy(d,s->s2->conn_id,SSL2_CONNECTION_ID_LENGTH);
810 d+=SSL2_CONNECTION_ID_LENGTH;
812 s->state=SSL2_ST_SEND_SERVER_HELLO_B;
813 s->init_num=d-(unsigned char *)s->init_buf->data;
816 /* SSL2_ST_SEND_SERVER_HELLO_B */
817 /* If we are using TCP/IP, the performance is bad if we do 2
818 * writes without a read between them. This occurs when
819 * Session-id reuse is used, so I will put in a buffering module
823 if (!ssl_init_wbio_buffer(s,1)) return(-1);
826 return(ssl2_do_write(s));
829 static int get_client_finished(SSL *s)
835 p=(unsigned char *)s->init_buf->data;
836 if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A)
838 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
839 if (i < 1-s->init_num)
840 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
843 if (*p != SSL2_MT_CLIENT_FINISHED)
845 if (*p != SSL2_MT_ERROR)
847 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
848 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
852 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_PEER_ERROR);
853 /* try to read the error message */
854 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
855 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
859 s->state=SSL2_ST_GET_CLIENT_FINISHED_B;
862 /* SSL2_ST_GET_CLIENT_FINISHED_B */
863 if (s->s2->conn_id_length > sizeof s->s2->conn_id)
865 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
866 SSLerr(SSL_F_GET_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
869 len = 1 + (unsigned long)s->s2->conn_id_length;
870 n = (int)len - s->init_num;
871 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
874 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
877 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-FINISHED */
879 if (memcmp(p,s->s2->conn_id,s->s2->conn_id_length) != 0)
881 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
882 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_CONNECTION_ID_IS_DIFFERENT);
888 static int server_verify(SSL *s)
892 if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A)
894 p=(unsigned char *)s->init_buf->data;
895 *(p++)=SSL2_MT_SERVER_VERIFY;
896 if (s->s2->challenge_length > sizeof s->s2->challenge)
898 SSLerr(SSL_F_SERVER_VERIFY, ERR_R_INTERNAL_ERROR);
901 memcpy(p,s->s2->challenge,(unsigned int)s->s2->challenge_length);
902 /* p+=s->s2->challenge_length; */
904 s->state=SSL2_ST_SEND_SERVER_VERIFY_B;
905 s->init_num=s->s2->challenge_length+1;
908 return(ssl2_do_write(s));
911 static int server_finish(SSL *s)
915 if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A)
917 p=(unsigned char *)s->init_buf->data;
918 *(p++)=SSL2_MT_SERVER_FINISHED;
920 if (s->session->session_id_length > sizeof s->session->session_id)
922 SSLerr(SSL_F_SERVER_FINISH, ERR_R_INTERNAL_ERROR);
925 memcpy(p,s->session->session_id, (unsigned int)s->session->session_id_length);
926 /* p+=s->session->session_id_length; */
928 s->state=SSL2_ST_SEND_SERVER_FINISHED_B;
929 s->init_num=s->session->session_id_length+1;
933 /* SSL2_ST_SEND_SERVER_FINISHED_B */
934 return(ssl2_do_write(s));
937 /* send the request and check the response */
938 static int request_certificate(SSL *s)
940 unsigned char *p,*p2,*buf2;
942 int i,j,ctype,ret= -1;
945 STACK_OF(X509) *sk=NULL;
948 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A)
950 p=(unsigned char *)s->init_buf->data;
951 *(p++)=SSL2_MT_REQUEST_CERTIFICATE;
952 *(p++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION;
953 RAND_pseudo_bytes(ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
954 memcpy(p,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
956 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_B;
957 s->init_num=SSL2_MIN_CERT_CHALLENGE_LENGTH+2;
961 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B)
971 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_C;
974 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C)
976 p=(unsigned char *)s->init_buf->data;
977 i=ssl2_read(s,(char *)&(p[s->init_num]),6-s->init_num); /* try to read 6 octets ... */
978 if (i < 3-s->init_num) /* ... but don't call ssl2_part_read now if we got at least 3
979 * (probably NO-CERTIFICATE-ERROR) */
981 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
986 if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR))
989 if (i != SSL2_PE_NO_CERTIFICATE)
991 /* not the error message we expected -- let ssl2_part_read handle it */
993 ret = ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE, 3);
998 s->msg_callback(0, s->version, 0, p, 3, s, s->msg_callback_arg); /* ERROR */
1000 /* this is the one place where we can recover from an SSL 2.0 error */
1002 if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)
1004 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
1005 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1011 if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6))
1013 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
1014 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_SHORT_READ);
1017 if (s->init_num != 6)
1019 SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR);
1023 /* ok we have a response */
1024 /* certificate type, there is only one right now. */
1026 if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
1028 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
1029 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_RESPONSE_ARGUMENT);
1032 n2s(p,i); s->s2->tmp.clen=i;
1033 n2s(p,i); s->s2->tmp.rlen=i;
1034 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_D;
1037 /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */
1038 p=(unsigned char *)s->init_buf->data;
1039 len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen;
1040 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
1042 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_MESSAGE_TOO_LONG);
1045 j = (int)len - s->init_num;
1046 i = ssl2_read(s,(char *)&(p[s->init_num]),j);
1049 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
1052 if (s->msg_callback)
1053 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-CERTIFICATE */
1056 x509=(X509 *)d2i_X509(NULL,&p,(long)s->s2->tmp.clen);
1059 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_X509_LIB);
1063 if (((sk=sk_X509_new_null()) == NULL) || (!sk_X509_push(sk,x509)))
1065 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1069 i=ssl_verify_cert_chain(s,sk);
1071 if (i) /* we like the packet, now check the chksum */
1074 EVP_PKEY *pkey=NULL;
1076 EVP_MD_CTX_init(&ctx);
1077 EVP_VerifyInit_ex(&ctx,s->ctx->rsa_md5, NULL);
1078 EVP_VerifyUpdate(&ctx,s->s2->key_material,
1079 s->s2->key_material_length);
1080 EVP_VerifyUpdate(&ctx,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
1082 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
1083 buf2=OPENSSL_malloc((unsigned int)i);
1086 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1090 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2);
1091 EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i);
1094 pkey=X509_get_pubkey(x509);
1095 if (pkey == NULL) goto end;
1096 i=EVP_VerifyFinal(&ctx,p,s->s2->tmp.rlen,pkey);
1097 EVP_PKEY_free(pkey);
1098 EVP_MD_CTX_cleanup(&ctx);
1102 if (s->session->peer != NULL)
1103 X509_free(s->session->peer);
1104 s->session->peer=x509;
1105 CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
1106 s->session->verify_result = s->verify_result;
1112 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_CHECKSUM);
1119 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
1127 static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
1128 unsigned char *to, int padding)
1133 if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL))
1135 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_NO_PRIVATEKEY);
1138 if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA)
1140 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
1143 rsa=c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa;
1145 /* we have the public key */
1146 i=RSA_private_decrypt(len,from,to,rsa,padding);
1148 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,ERR_R_RSA_LIB);
1151 #else /* !OPENSSL_NO_SSL2 */
1154 static void *dummy=&dummy;