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 memcpy((char *)&SSLv2_server_data,(char *)sslv2_base_method(),
150 SSLv2_server_data.ssl_accept=ssl2_accept;
151 SSLv2_server_data.get_ssl_method=ssl2_get_server_method;
154 return(&SSLv2_server_data);
157 int ssl2_accept(SSL *s)
159 unsigned long l=time(NULL);
163 void (*cb)(const SSL *ssl,int type,int val)=NULL;
166 RAND_add(&l,sizeof(l),0);
170 if (s->info_callback != NULL)
172 else if (s->ctx->info_callback != NULL)
173 cb=s->ctx->info_callback;
175 /* init things to blank */
177 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
181 SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
194 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
195 case SSL_ST_OK|SSL_ST_ACCEPT:
198 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
200 s->version=SSL2_VERSION;
201 s->type=SSL_ST_ACCEPT;
204 if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
205 { ret= -1; goto end; }
206 if (!BUF_MEM_grow(buf,(int)
207 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
208 { ret= -1; goto end; }
211 s->ctx->stats.sess_accept++;
212 s->handshake_func=ssl2_accept;
213 s->state=SSL2_ST_GET_CLIENT_HELLO_A;
216 case SSL2_ST_GET_CLIENT_HELLO_A:
217 case SSL2_ST_GET_CLIENT_HELLO_B:
218 case SSL2_ST_GET_CLIENT_HELLO_C:
220 ret=get_client_hello(s);
221 if (ret <= 0) goto end;
223 s->state=SSL2_ST_SEND_SERVER_HELLO_A;
226 case SSL2_ST_SEND_SERVER_HELLO_A:
227 case SSL2_ST_SEND_SERVER_HELLO_B:
229 if (ret <= 0) goto end;
233 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_A;
238 s->state=SSL2_ST_SERVER_START_ENCRYPTION;
241 case SSL2_ST_GET_CLIENT_MASTER_KEY_A:
242 case SSL2_ST_GET_CLIENT_MASTER_KEY_B:
243 ret=get_client_master_key(s);
244 if (ret <= 0) goto end;
246 s->state=SSL2_ST_SERVER_START_ENCRYPTION;
249 case SSL2_ST_SERVER_START_ENCRYPTION:
250 /* Ok we how have sent all the stuff needed to
251 * start encrypting, the next packet back will
253 if (!ssl2_enc_init(s,0))
254 { ret= -1; goto end; }
256 s->state=SSL2_ST_SEND_SERVER_VERIFY_A;
259 case SSL2_ST_SEND_SERVER_VERIFY_A:
260 case SSL2_ST_SEND_SERVER_VERIFY_B:
261 ret=server_verify(s);
262 if (ret <= 0) goto end;
266 /* If we are in here, we have been
267 * buffering the output, so we need to
268 * flush it and remove buffering from
270 s->state=SSL2_ST_SEND_SERVER_VERIFY_C;
275 s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
279 case SSL2_ST_SEND_SERVER_VERIFY_C:
280 /* get the number of bytes to write */
281 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
284 s->rwstate=SSL_WRITING;
285 num1=BIO_flush(s->wbio);
286 if (num1 <= 0) { ret= -1; goto end; }
287 s->rwstate=SSL_NOTHING;
290 /* flushed and now remove buffering */
291 s->wbio=BIO_pop(s->wbio);
293 s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
296 case SSL2_ST_GET_CLIENT_FINISHED_A:
297 case SSL2_ST_GET_CLIENT_FINISHED_B:
298 ret=get_client_finished(s);
302 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_A;
305 case SSL2_ST_SEND_REQUEST_CERTIFICATE_A:
306 case SSL2_ST_SEND_REQUEST_CERTIFICATE_B:
307 case SSL2_ST_SEND_REQUEST_CERTIFICATE_C:
308 case SSL2_ST_SEND_REQUEST_CERTIFICATE_D:
309 /* don't do a 'request certificate' if we
310 * don't want to, or we already have one, and
311 * we only want to do it once. */
312 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
313 ((s->session->peer != NULL) &&
314 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
316 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
321 ret=request_certificate(s);
322 if (ret <= 0) goto end;
324 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
328 case SSL2_ST_SEND_SERVER_FINISHED_A:
329 case SSL2_ST_SEND_SERVER_FINISHED_B:
330 ret=server_finish(s);
331 if (ret <= 0) goto end;
337 BUF_MEM_free(s->init_buf);
338 ssl_free_wbio_buffer(s);
341 /* ERR_clear_error();*/
343 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
345 s->ctx->stats.sess_accept_good++;
349 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
355 SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_UNKNOWN_STATE);
361 if ((cb != NULL) && (s->state != state))
365 cb(s,SSL_CB_ACCEPT_LOOP,1);
372 cb(s,SSL_CB_ACCEPT_EXIT,ret);
376 static int get_client_master_key(SSL *s)
378 int is_export,i,n,keya,ek;
385 p=(unsigned char *)s->init_buf->data;
386 if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A)
388 i=ssl2_read(s,(char *)&(p[s->init_num]),10-s->init_num);
390 if (i < (10-s->init_num))
391 return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
394 if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY)
396 if (p[-1] != SSL2_MT_ERROR)
398 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
399 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_READ_WRONG_PACKET_TYPE);
402 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_PEER_ERROR);
406 cp=ssl2_get_cipher_by_char(p);
409 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
410 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_CIPHER_MATCH);
413 s->session->cipher= cp;
416 n2s(p,i); s->s2->tmp.clear=i;
417 n2s(p,i); s->s2->tmp.enc=i;
418 n2s(p,i); s->session->key_arg_length=i;
419 if(s->session->key_arg_length > SSL_MAX_KEY_ARG_LENGTH)
421 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
422 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_KEY_ARG_TOO_LONG);
425 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B;
428 /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */
429 p=(unsigned char *)s->init_buf->data;
430 if (s->init_buf->length < SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
432 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
433 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
436 keya=s->session->key_arg_length;
437 len = 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc + (unsigned long)keya;
438 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
440 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
441 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG);
444 n = (int)len - s->init_num;
445 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
446 if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
448 s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-MASTER-KEY */
451 memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]),
454 if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)
456 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
457 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY);
460 i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc,
461 &(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]),
462 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
464 is_export=SSL_C_IS_EXPORT(s->session->cipher);
466 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))
468 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
469 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
473 if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
483 /* If a bad decrypt, continue with protocol but with a
484 * random master secret (Bleichenbacher attack) */
486 ((!is_export && (i != EVP_CIPHER_key_length(c)))
487 || (is_export && ((i != ek) || (s->s2->tmp.clear+(unsigned int)i !=
488 (unsigned int)EVP_CIPHER_key_length(c))))))
494 i=EVP_CIPHER_key_length(c);
495 RAND_pseudo_bytes(p,i);
501 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT);
503 /* incorrect number of key bytes for non export cipher */
504 else if ((!is_export && (i != EVP_CIPHER_key_length(c)))
505 || (is_export && ((i != ek) || (s->s2->tmp.clear+i !=
506 EVP_CIPHER_key_length(c)))))
509 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS);
513 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
518 if (is_export) i+=s->s2->tmp.clear;
520 if (i > SSL_MAX_MASTER_KEY_LENGTH)
522 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
523 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
526 s->session->master_key_length=i;
527 memcpy(s->session->master_key,p,(unsigned int)i);
531 static int get_client_hello(SSL *s)
536 STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */
537 STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */
538 STACK_OF(SSL_CIPHER) *prio, *allow;
541 /* This is a bit of a hack to check for the correct packet
542 * type the first time round. */
543 if (s->state == SSL2_ST_GET_CLIENT_HELLO_A)
546 s->state=SSL2_ST_GET_CLIENT_HELLO_B;
549 p=(unsigned char *)s->init_buf->data;
550 if (s->state == SSL2_ST_GET_CLIENT_HELLO_B)
552 i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num);
553 if (i < (9-s->init_num))
554 return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
557 if (*(p++) != SSL2_MT_CLIENT_HELLO)
559 if (p[-1] != SSL2_MT_ERROR)
561 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
562 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE);
565 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR);
569 if (i < s->version) s->version=i;
570 n2s(p,i); s->s2->tmp.cipher_spec_length=i;
571 n2s(p,i); s->s2->tmp.session_id_length=i;
572 n2s(p,i); s->s2->challenge_length=i;
573 if ( (i < SSL2_MIN_CHALLENGE_LENGTH) ||
574 (i > SSL2_MAX_CHALLENGE_LENGTH))
576 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
577 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH);
580 s->state=SSL2_ST_GET_CLIENT_HELLO_C;
583 /* SSL2_ST_GET_CLIENT_HELLO_C */
584 p=(unsigned char *)s->init_buf->data;
585 len = 9 + (unsigned long)s->s2->tmp.cipher_spec_length + (unsigned long)s->s2->challenge_length + (unsigned long)s->s2->tmp.session_id_length;
586 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
588 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
589 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_MESSAGE_TOO_LONG);
592 n = (int)len - s->init_num;
593 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
594 if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
596 s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-HELLO */
599 /* get session-id before cipher stuff so we can get out session
600 * structure if it is cached */
602 if ((s->s2->tmp.session_id_length != 0) &&
603 (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH))
605 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
606 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH);
610 if (s->s2->tmp.session_id_length == 0)
612 if (!ssl_get_new_session(s,1))
614 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
620 i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]),
621 s->s2->tmp.session_id_length);
623 { /* previous session */
628 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
635 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
636 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET);
640 if (!ssl_get_new_session(s,1))
642 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
650 cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length,
651 &s->session->ciphers);
652 if (cs == NULL) goto mem_err;
654 cl=SSL_get_ciphers(s);
656 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
658 prio=sk_SSL_CIPHER_dup(cl);
659 if (prio == NULL) goto mem_err;
667 for (z=0; z<sk_SSL_CIPHER_num(prio); z++)
669 if (sk_SSL_CIPHER_find(allow,sk_SSL_CIPHER_value(prio,z)) < 0)
671 sk_SSL_CIPHER_delete(prio,z);
675 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
677 sk_SSL_CIPHER_free(s->session->ciphers);
678 s->session->ciphers = prio;
680 /* s->session->ciphers should now have a list of
681 * ciphers that are on both the client and server.
682 * This list is ordered by the order the client sent
683 * the ciphers or in the order of the server's preference
684 * if SSL_OP_CIPHER_SERVER_PREFERENCE was set.
687 p+=s->s2->tmp.cipher_spec_length;
688 /* done cipher selection */
690 /* session id extracted already */
691 p+=s->s2->tmp.session_id_length;
694 if (s->s2->challenge_length > sizeof s->s2->challenge)
696 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
697 SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
700 memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length);
703 SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
707 static int server_hello(SSL *s)
711 STACK_OF(SSL_CIPHER) *sk;
713 p=(unsigned char *)s->init_buf->data;
714 if (s->state == SSL2_ST_SEND_SERVER_HELLO_A)
717 *(p++)=SSL2_MT_SERVER_HELLO; /* type */
719 *(p++)=(unsigned char)hit;
723 if (s->session->sess_cert != NULL)
724 /* This can't really happen because get_client_hello
725 * has called ssl_get_new_session, which does not set
727 ssl_sess_cert_free(s->session->sess_cert);
728 s->session->sess_cert = ssl_sess_cert_new();
729 if (s->session->sess_cert == NULL)
731 SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE);
735 /* If 'hit' is set, then s->sess_cert may be non-NULL or NULL,
736 * depending on whether it survived in the internal cache
737 * or was retrieved from an external cache.
738 * If it is NULL, we cannot put any useful data in it anyway,
739 * so we don't touch it.
742 #else /* That's what used to be done when cert_st and sess_cert_st were
745 { /* else add cert to session */
746 CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
747 if (s->session->sess_cert != NULL)
748 ssl_cert_free(s->session->sess_cert);
749 s->session->sess_cert=s->cert;
751 else /* We have a session id-cache hit, if the
752 * session-id has no certificate listed against
753 * the 'cert' structure, grab the 'old' one
754 * listed against the SSL connection */
756 if (s->session->sess_cert == NULL)
758 CRYPTO_add(&s->cert->references,1,
759 CRYPTO_LOCK_SSL_CERT);
760 s->session->sess_cert=s->cert;
767 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
768 SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED);
774 *(p++)=0; /* no certificate type */
775 s2n(s->version,p); /* version */
776 s2n(0,p); /* cert len */
777 s2n(0,p); /* ciphers len */
782 /* put certificate type */
783 *(p++)=SSL2_CT_X509_CERTIFICATE;
784 s2n(s->version,p); /* version */
785 n=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
786 s2n(n,p); /* certificate length */
787 i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&d);
790 /* lets send out the ciphers we like in the
792 sk= s->session->ciphers;
793 n=ssl_cipher_list_to_bytes(s,s->session->ciphers,d);
795 s2n(n,p); /* add cipher length */
798 /* make and send conn_id */
799 s2n(SSL2_CONNECTION_ID_LENGTH,p); /* add conn_id length */
800 s->s2->conn_id_length=SSL2_CONNECTION_ID_LENGTH;
801 RAND_pseudo_bytes(s->s2->conn_id,(int)s->s2->conn_id_length);
802 memcpy(d,s->s2->conn_id,SSL2_CONNECTION_ID_LENGTH);
803 d+=SSL2_CONNECTION_ID_LENGTH;
805 s->state=SSL2_ST_SEND_SERVER_HELLO_B;
806 s->init_num=d-(unsigned char *)s->init_buf->data;
809 /* SSL2_ST_SEND_SERVER_HELLO_B */
810 /* If we are using TCP/IP, the performance is bad if we do 2
811 * writes without a read between them. This occurs when
812 * Session-id reuse is used, so I will put in a buffering module
816 if (!ssl_init_wbio_buffer(s,1)) return(-1);
819 return(ssl2_do_write(s));
822 static int get_client_finished(SSL *s)
828 p=(unsigned char *)s->init_buf->data;
829 if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A)
831 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
832 if (i < 1-s->init_num)
833 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
836 if (*p != SSL2_MT_CLIENT_FINISHED)
838 if (*p != SSL2_MT_ERROR)
840 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
841 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
845 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_PEER_ERROR);
846 /* try to read the error message */
847 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
848 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
852 s->state=SSL2_ST_GET_CLIENT_FINISHED_B;
855 /* SSL2_ST_GET_CLIENT_FINISHED_B */
856 if (s->s2->conn_id_length > sizeof s->s2->conn_id)
858 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
859 SSLerr(SSL_F_GET_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
862 len = 1 + (unsigned long)s->s2->conn_id_length;
863 n = (int)len - s->init_num;
864 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
867 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
870 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-FINISHED */
872 if (memcmp(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length) != 0)
874 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
875 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_CONNECTION_ID_IS_DIFFERENT);
881 static int server_verify(SSL *s)
885 if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A)
887 p=(unsigned char *)s->init_buf->data;
888 *(p++)=SSL2_MT_SERVER_VERIFY;
889 if (s->s2->challenge_length > sizeof s->s2->challenge)
891 SSLerr(SSL_F_SERVER_VERIFY, ERR_R_INTERNAL_ERROR);
894 memcpy(p,s->s2->challenge,(unsigned int)s->s2->challenge_length);
895 /* p+=s->s2->challenge_length; */
897 s->state=SSL2_ST_SEND_SERVER_VERIFY_B;
898 s->init_num=s->s2->challenge_length+1;
901 return(ssl2_do_write(s));
904 static int server_finish(SSL *s)
908 if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A)
910 p=(unsigned char *)s->init_buf->data;
911 *(p++)=SSL2_MT_SERVER_FINISHED;
913 if (s->session->session_id_length > sizeof s->session->session_id)
915 SSLerr(SSL_F_SERVER_FINISH, ERR_R_INTERNAL_ERROR);
918 memcpy(p,s->session->session_id, (unsigned int)s->session->session_id_length);
919 /* p+=s->session->session_id_length; */
921 s->state=SSL2_ST_SEND_SERVER_FINISHED_B;
922 s->init_num=s->session->session_id_length+1;
926 /* SSL2_ST_SEND_SERVER_FINISHED_B */
927 return(ssl2_do_write(s));
930 /* send the request and check the response */
931 static int request_certificate(SSL *s)
933 unsigned char *p,*p2,*buf2;
935 int i,j,ctype,ret= -1;
938 STACK_OF(X509) *sk=NULL;
941 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A)
943 p=(unsigned char *)s->init_buf->data;
944 *(p++)=SSL2_MT_REQUEST_CERTIFICATE;
945 *(p++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION;
946 RAND_pseudo_bytes(ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
947 memcpy(p,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
949 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_B;
950 s->init_num=SSL2_MIN_CERT_CHALLENGE_LENGTH+2;
954 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B)
964 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_C;
967 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C)
969 p=(unsigned char *)s->init_buf->data;
970 i=ssl2_read(s,(char *)&(p[s->init_num]),6-s->init_num); /* try to read 6 octets ... */
971 if (i < 3-s->init_num) /* ... but don't call ssl2_part_read now if we got at least 3
972 * (probably NO-CERTIFICATE-ERROR) */
974 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
979 if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR))
982 if (i != SSL2_PE_NO_CERTIFICATE)
984 /* not the error message we expected -- let ssl2_part_read handle it */
986 ret = ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE, 3);
991 s->msg_callback(0, s->version, 0, p, 3, s, s->msg_callback_arg); /* ERROR */
993 /* this is the one place where we can recover from an SSL 2.0 error */
995 if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)
997 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
998 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1004 if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6))
1006 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
1007 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_SHORT_READ);
1010 if (s->init_num != 6)
1012 SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR);
1016 /* ok we have a response */
1017 /* certificate type, there is only one right now. */
1019 if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
1021 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
1022 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_RESPONSE_ARGUMENT);
1025 n2s(p,i); s->s2->tmp.clen=i;
1026 n2s(p,i); s->s2->tmp.rlen=i;
1027 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_D;
1030 /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */
1031 p=(unsigned char *)s->init_buf->data;
1032 len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen;
1033 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
1035 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_MESSAGE_TOO_LONG);
1038 j = (int)len - s->init_num;
1039 i = ssl2_read(s,(char *)&(p[s->init_num]),j);
1042 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
1045 if (s->msg_callback)
1046 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-CERTIFICATE */
1049 x509=(X509 *)d2i_X509(NULL,&p,(long)s->s2->tmp.clen);
1052 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_X509_LIB);
1056 if (((sk=sk_X509_new_null()) == NULL) || (!sk_X509_push(sk,x509)))
1058 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1062 i=ssl_verify_cert_chain(s,sk);
1064 if (i) /* we like the packet, now check the chksum */
1067 EVP_PKEY *pkey=NULL;
1069 EVP_MD_CTX_init(&ctx);
1070 EVP_VerifyInit_ex(&ctx,s->ctx->rsa_md5, NULL);
1071 EVP_VerifyUpdate(&ctx,s->s2->key_material,
1072 (unsigned int)s->s2->key_material_length);
1073 EVP_VerifyUpdate(&ctx,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
1075 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
1076 buf2=OPENSSL_malloc((unsigned int)i);
1079 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1083 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2);
1084 EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i);
1087 pkey=X509_get_pubkey(x509);
1088 if (pkey == NULL) goto end;
1089 i=EVP_VerifyFinal(&ctx,p,s->s2->tmp.rlen,pkey);
1090 EVP_PKEY_free(pkey);
1091 EVP_MD_CTX_cleanup(&ctx);
1095 if (s->session->peer != NULL)
1096 X509_free(s->session->peer);
1097 s->session->peer=x509;
1098 CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
1099 s->session->verify_result = s->verify_result;
1105 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_CHECKSUM);
1112 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
1120 static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
1121 unsigned char *to, int padding)
1126 if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL))
1128 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_NO_PRIVATEKEY);
1131 if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA)
1133 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
1136 rsa=c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa;
1138 /* we have the public key */
1139 i=RSA_private_decrypt(len,from,to,rsa,padding);
1141 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,ERR_R_RSA_LIB);
1144 #else /* !OPENSSL_NO_SSL2 */
1147 static void *dummy=&dummy;