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,
407 cp=ssl2_get_cipher_by_char(p);
410 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
411 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,
412 SSL_R_NO_CIPHER_MATCH);
415 s->session->cipher= cp;
418 n2s(p,i); s->s2->tmp.clear=i;
419 n2s(p,i); s->s2->tmp.enc=i;
420 n2s(p,i); s->session->key_arg_length=i;
421 if(s->session->key_arg_length > SSL_MAX_KEY_ARG_LENGTH)
423 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,
424 SSL_R_KEY_ARG_TOO_LONG);
427 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B;
430 /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */
431 p=(unsigned char *)s->init_buf->data;
432 die(s->init_buf->length >= SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER);
433 keya=s->session->key_arg_length;
434 len = 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc + (unsigned long)keya;
435 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
437 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG);
440 n = (int)len - s->init_num;
441 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
442 if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
444 s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-MASTER-KEY */
447 memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]),
450 if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)
452 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
453 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY);
456 i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc,
457 &(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]),
458 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
460 is_export=SSL_C_IS_EXPORT(s->session->cipher);
462 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))
464 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
465 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
469 if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
479 /* If a bad decrypt, continue with protocol but with a
480 * random master secret (Bleichenbacher attack) */
482 ((!is_export && (i != EVP_CIPHER_key_length(c)))
483 || (is_export && ((i != ek) || (s->s2->tmp.clear+(unsigned int)i !=
484 (unsigned int)EVP_CIPHER_key_length(c))))))
490 i=EVP_CIPHER_key_length(c);
491 RAND_pseudo_bytes(p,i);
497 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT);
499 /* incorrect number of key bytes for non export cipher */
500 else if ((!is_export && (i != EVP_CIPHER_key_length(c)))
501 || (is_export && ((i != ek) || (s->s2->tmp.clear+i !=
502 EVP_CIPHER_key_length(c)))))
505 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS);
509 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
514 if (is_export) i+=s->s2->tmp.clear;
515 die(i <= SSL_MAX_MASTER_KEY_LENGTH);
516 s->session->master_key_length=i;
517 memcpy(s->session->master_key,p,(unsigned int)i);
521 static int get_client_hello(SSL *s)
526 STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */
527 STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */
528 STACK_OF(SSL_CIPHER) *prio, *allow;
531 /* This is a bit of a hack to check for the correct packet
532 * type the first time round. */
533 if (s->state == SSL2_ST_GET_CLIENT_HELLO_A)
536 s->state=SSL2_ST_GET_CLIENT_HELLO_B;
539 p=(unsigned char *)s->init_buf->data;
540 if (s->state == SSL2_ST_GET_CLIENT_HELLO_B)
542 i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num);
543 if (i < (9-s->init_num))
544 return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
547 if (*(p++) != SSL2_MT_CLIENT_HELLO)
549 if (p[-1] != SSL2_MT_ERROR)
551 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
552 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE);
555 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR);
559 if (i < s->version) s->version=i;
560 n2s(p,i); s->s2->tmp.cipher_spec_length=i;
561 n2s(p,i); s->s2->tmp.session_id_length=i;
562 n2s(p,i); s->s2->challenge_length=i;
563 if ( (i < SSL2_MIN_CHALLENGE_LENGTH) ||
564 (i > SSL2_MAX_CHALLENGE_LENGTH))
566 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH);
569 s->state=SSL2_ST_GET_CLIENT_HELLO_C;
572 /* SSL2_ST_GET_CLIENT_HELLO_C */
573 p=(unsigned char *)s->init_buf->data;
574 len = 9 + (unsigned long)s->s2->tmp.cipher_spec_length + (unsigned long)s->s2->challenge_length + (unsigned long)s->s2->tmp.session_id_length;
575 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
577 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_MESSAGE_TOO_LONG);
580 n = (int)len - s->init_num;
581 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
582 if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
584 s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-HELLO */
587 /* get session-id before cipher stuff so we can get out session
588 * structure if it is cached */
590 if ((s->s2->tmp.session_id_length != 0) &&
591 (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH))
593 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
594 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH);
598 if (s->s2->tmp.session_id_length == 0)
600 if (!ssl_get_new_session(s,1))
602 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
608 i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]),
609 s->s2->tmp.session_id_length);
611 { /* previous session */
616 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
623 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
624 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET);
628 if (!ssl_get_new_session(s,1))
630 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
638 cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length,
639 &s->session->ciphers);
640 if (cs == NULL) goto mem_err;
642 cl=SSL_get_ciphers(s);
644 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
646 prio=sk_SSL_CIPHER_dup(cl);
647 if (prio == NULL) goto mem_err;
655 for (z=0; z<sk_SSL_CIPHER_num(prio); z++)
657 if (sk_SSL_CIPHER_find(allow,sk_SSL_CIPHER_value(prio,z)) < 0)
659 sk_SSL_CIPHER_delete(prio,z);
663 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
665 sk_SSL_CIPHER_free(s->session->ciphers);
666 s->session->ciphers = prio;
668 /* s->session->ciphers should now have a list of
669 * ciphers that are on both the client and server.
670 * This list is ordered by the order the client sent
671 * the ciphers or in the order of the server's preference
672 * if SSL_OP_CIPHER_SERVER_PREFERENCE was set.
675 p+=s->s2->tmp.cipher_spec_length;
676 /* done cipher selection */
678 /* session id extracted already */
679 p+=s->s2->tmp.session_id_length;
682 die(s->s2->challenge_length <= sizeof s->s2->challenge);
683 memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length);
686 SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
690 static int server_hello(SSL *s)
694 STACK_OF(SSL_CIPHER) *sk;
696 p=(unsigned char *)s->init_buf->data;
697 if (s->state == SSL2_ST_SEND_SERVER_HELLO_A)
700 *(p++)=SSL2_MT_SERVER_HELLO; /* type */
702 *(p++)=(unsigned char)hit;
706 if (s->session->sess_cert != NULL)
707 /* This can't really happen because get_client_hello
708 * has called ssl_get_new_session, which does not set
710 ssl_sess_cert_free(s->session->sess_cert);
711 s->session->sess_cert = ssl_sess_cert_new();
712 if (s->session->sess_cert == NULL)
714 SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE);
718 /* If 'hit' is set, then s->sess_cert may be non-NULL or NULL,
719 * depending on whether it survived in the internal cache
720 * or was retrieved from an external cache.
721 * If it is NULL, we cannot put any useful data in it anyway,
722 * so we don't touch it.
725 #else /* That's what used to be done when cert_st and sess_cert_st were
728 { /* else add cert to session */
729 CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
730 if (s->session->sess_cert != NULL)
731 ssl_cert_free(s->session->sess_cert);
732 s->session->sess_cert=s->cert;
734 else /* We have a session id-cache hit, if the
735 * session-id has no certificate listed against
736 * the 'cert' structure, grab the 'old' one
737 * listed against the SSL connection */
739 if (s->session->sess_cert == NULL)
741 CRYPTO_add(&s->cert->references,1,
742 CRYPTO_LOCK_SSL_CERT);
743 s->session->sess_cert=s->cert;
750 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
751 SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED);
757 *(p++)=0; /* no certificate type */
758 s2n(s->version,p); /* version */
759 s2n(0,p); /* cert len */
760 s2n(0,p); /* ciphers len */
765 /* put certificate type */
766 *(p++)=SSL2_CT_X509_CERTIFICATE;
767 s2n(s->version,p); /* version */
768 n=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
769 s2n(n,p); /* certificate length */
770 i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&d);
773 /* lets send out the ciphers we like in the
775 sk= s->session->ciphers;
776 n=ssl_cipher_list_to_bytes(s,s->session->ciphers,d);
778 s2n(n,p); /* add cipher length */
781 /* make and send conn_id */
782 s2n(SSL2_CONNECTION_ID_LENGTH,p); /* add conn_id length */
783 s->s2->conn_id_length=SSL2_CONNECTION_ID_LENGTH;
784 RAND_pseudo_bytes(s->s2->conn_id,(int)s->s2->conn_id_length);
785 memcpy(d,s->s2->conn_id,SSL2_CONNECTION_ID_LENGTH);
786 d+=SSL2_CONNECTION_ID_LENGTH;
788 s->state=SSL2_ST_SEND_SERVER_HELLO_B;
789 s->init_num=d-(unsigned char *)s->init_buf->data;
792 /* SSL2_ST_SEND_SERVER_HELLO_B */
793 /* If we are using TCP/IP, the performance is bad if we do 2
794 * writes without a read between them. This occurs when
795 * Session-id reuse is used, so I will put in a buffering module
799 if (!ssl_init_wbio_buffer(s,1)) return(-1);
802 return(ssl2_do_write(s));
805 static int get_client_finished(SSL *s)
811 p=(unsigned char *)s->init_buf->data;
812 if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A)
814 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
815 if (i < 1-s->init_num)
816 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
819 if (*p != SSL2_MT_CLIENT_FINISHED)
821 if (*p != SSL2_MT_ERROR)
823 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
824 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
828 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_PEER_ERROR);
829 /* try to read the error message */
830 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
831 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
835 s->state=SSL2_ST_GET_CLIENT_FINISHED_B;
838 /* SSL2_ST_GET_CLIENT_FINISHED_B */
839 die(s->s2->conn_id_length <= sizeof s->s2->conn_id);
840 len = 1 + (unsigned long)s->s2->conn_id_length;
841 n = (int)len - s->init_num;
842 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
845 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
848 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-FINISHED */
850 if (memcmp(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length) != 0)
852 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
853 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_CONNECTION_ID_IS_DIFFERENT);
859 static int server_verify(SSL *s)
863 if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A)
865 p=(unsigned char *)s->init_buf->data;
866 *(p++)=SSL2_MT_SERVER_VERIFY;
867 die(s->s2->challenge_length <= sizeof s->s2->challenge);
868 memcpy(p,s->s2->challenge,(unsigned int)s->s2->challenge_length);
869 /* p+=s->s2->challenge_length; */
871 s->state=SSL2_ST_SEND_SERVER_VERIFY_B;
872 s->init_num=s->s2->challenge_length+1;
875 return(ssl2_do_write(s));
878 static int server_finish(SSL *s)
882 if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A)
884 p=(unsigned char *)s->init_buf->data;
885 *(p++)=SSL2_MT_SERVER_FINISHED;
887 die(s->session->session_id_length
888 <= sizeof s->session->session_id);
889 memcpy(p,s->session->session_id,
890 (unsigned int)s->session->session_id_length);
891 /* p+=s->session->session_id_length; */
893 s->state=SSL2_ST_SEND_SERVER_FINISHED_B;
894 s->init_num=s->session->session_id_length+1;
898 /* SSL2_ST_SEND_SERVER_FINISHED_B */
899 return(ssl2_do_write(s));
902 /* send the request and check the response */
903 static int request_certificate(SSL *s)
905 unsigned char *p,*p2,*buf2;
907 int i,j,ctype,ret= -1;
910 STACK_OF(X509) *sk=NULL;
913 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A)
915 p=(unsigned char *)s->init_buf->data;
916 *(p++)=SSL2_MT_REQUEST_CERTIFICATE;
917 *(p++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION;
918 RAND_pseudo_bytes(ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
919 memcpy(p,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
921 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_B;
922 s->init_num=SSL2_MIN_CERT_CHALLENGE_LENGTH+2;
926 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B)
936 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_C;
939 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C)
941 p=(unsigned char *)s->init_buf->data;
942 i=ssl2_read(s,(char *)&(p[s->init_num]),6-s->init_num); /* try to read 6 octets ... */
943 if (i < 3-s->init_num) /* ... but don't call ssl2_part_read now if we got at least 3
944 * (probably NO-CERTIFICATE-ERROR) */
946 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
951 if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR))
954 if (i != SSL2_PE_NO_CERTIFICATE)
956 /* not the error message we expected -- let ssl2_part_read handle it */
958 ret = ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE, 3);
963 s->msg_callback(0, s->version, 0, p, 3, s, s->msg_callback_arg); /* ERROR */
965 /* this is the one place where we can recover from an SSL 2.0 error */
967 if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)
969 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
970 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
976 if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6))
978 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
979 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_SHORT_READ);
982 if (s->init_num != 6)
984 SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR);
988 /* ok we have a response */
989 /* certificate type, there is only one right now. */
991 if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
993 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
994 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_RESPONSE_ARGUMENT);
997 n2s(p,i); s->s2->tmp.clen=i;
998 n2s(p,i); s->s2->tmp.rlen=i;
999 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_D;
1002 /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */
1003 p=(unsigned char *)s->init_buf->data;
1004 len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen;
1005 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
1007 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG);
1010 j = (int)len - s->init_num;
1011 i = ssl2_read(s,(char *)&(p[s->init_num]),j);
1014 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
1017 if (s->msg_callback)
1018 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-CERTIFICATE */
1021 x509=(X509 *)d2i_X509(NULL,&p,(long)s->s2->tmp.clen);
1024 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_X509_LIB);
1028 if (((sk=sk_X509_new_null()) == NULL) || (!sk_X509_push(sk,x509)))
1030 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1034 i=ssl_verify_cert_chain(s,sk);
1036 if (i) /* we like the packet, now check the chksum */
1039 EVP_PKEY *pkey=NULL;
1041 EVP_MD_CTX_init(&ctx);
1042 EVP_VerifyInit_ex(&ctx,s->ctx->rsa_md5, NULL);
1043 EVP_VerifyUpdate(&ctx,s->s2->key_material,
1044 (unsigned int)s->s2->key_material_length);
1045 EVP_VerifyUpdate(&ctx,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
1047 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
1048 buf2=OPENSSL_malloc((unsigned int)i);
1051 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1055 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2);
1056 EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i);
1059 pkey=X509_get_pubkey(x509);
1060 if (pkey == NULL) goto end;
1061 i=EVP_VerifyFinal(&ctx,p,s->s2->tmp.rlen,pkey);
1062 EVP_PKEY_free(pkey);
1063 EVP_MD_CTX_cleanup(&ctx);
1067 if (s->session->peer != NULL)
1068 X509_free(s->session->peer);
1069 s->session->peer=x509;
1070 CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
1071 s->session->verify_result = s->verify_result;
1077 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_CHECKSUM);
1084 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
1092 static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
1093 unsigned char *to, int padding)
1098 if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL))
1100 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_NO_PRIVATEKEY);
1103 if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA)
1105 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
1108 rsa=c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa;
1110 /* we have the public key */
1111 i=RSA_private_decrypt(len,from,to,rsa,padding);
1113 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,ERR_R_RSA_LIB);
1116 #else /* !OPENSSL_NO_SSL2 */
1119 static void *dummy=&dummy;