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>
120 static const SSL_METHOD
*ssl2_get_server_method(int ver
);
121 static int get_client_master_key(SSL
*s
);
122 static int get_client_hello(SSL
*s
);
123 static int server_hello(SSL
*s
);
124 static int get_client_finished(SSL
*s
);
125 static int server_verify(SSL
*s
);
126 static int server_finish(SSL
*s
);
127 static int request_certificate(SSL
*s
);
128 static int ssl_rsa_private_decrypt(CERT
*c
, int len
, unsigned char *from
,
129 unsigned char *to
,int padding
);
132 static const SSL_METHOD
*ssl2_get_server_method(int ver
)
134 if (ver
== SSL2_VERSION
)
135 return(SSLv2_server_method());
140 IMPLEMENT_ssl2_meth_func(SSLv2_server_method
,
142 ssl_undefined_function
,
143 ssl2_get_server_method
)
145 int ssl2_accept(SSL
*s
)
147 unsigned long l
=(unsigned long)time(NULL
);
151 void (*cb
)(const SSL
*ssl
,int type
,int val
)=NULL
;
154 RAND_add(&l
,sizeof(l
),0);
158 if (s
->info_callback
!= NULL
)
160 else if (s
->ctx
->info_callback
!= NULL
)
161 cb
=s
->ctx
->info_callback
;
163 /* init things to blank */
165 if (!SSL_in_init(s
) || SSL_in_before(s
)) SSL_clear(s
);
169 SSLerr(SSL_F_SSL2_ACCEPT
,SSL_R_NO_CERTIFICATE_SET
);
182 case SSL_ST_BEFORE
|SSL_ST_ACCEPT
:
183 case SSL_ST_OK
|SSL_ST_ACCEPT
:
186 if (cb
!= NULL
) cb(s
,SSL_CB_HANDSHAKE_START
,1);
188 s
->version
=SSL2_VERSION
;
189 s
->type
=SSL_ST_ACCEPT
;
192 if ((buf
== NULL
) && ((buf
=BUF_MEM_new()) == NULL
))
193 { ret
= -1; goto end
; }
194 if (!BUF_MEM_grow(buf
,(int)
195 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER
))
196 { ret
= -1; goto end
; }
199 s
->ctx
->stats
.sess_accept
++;
200 s
->handshake_func
=ssl2_accept
;
201 s
->state
=SSL2_ST_GET_CLIENT_HELLO_A
;
204 case SSL2_ST_GET_CLIENT_HELLO_A
:
205 case SSL2_ST_GET_CLIENT_HELLO_B
:
206 case SSL2_ST_GET_CLIENT_HELLO_C
:
208 ret
=get_client_hello(s
);
209 if (ret
<= 0) goto end
;
211 s
->state
=SSL2_ST_SEND_SERVER_HELLO_A
;
214 case SSL2_ST_SEND_SERVER_HELLO_A
:
215 case SSL2_ST_SEND_SERVER_HELLO_B
:
217 if (ret
<= 0) goto end
;
221 s
->state
=SSL2_ST_GET_CLIENT_MASTER_KEY_A
;
226 s
->state
=SSL2_ST_SERVER_START_ENCRYPTION
;
229 case SSL2_ST_GET_CLIENT_MASTER_KEY_A
:
230 case SSL2_ST_GET_CLIENT_MASTER_KEY_B
:
231 ret
=get_client_master_key(s
);
232 if (ret
<= 0) goto end
;
234 s
->state
=SSL2_ST_SERVER_START_ENCRYPTION
;
237 case SSL2_ST_SERVER_START_ENCRYPTION
:
238 /* Ok we how have sent all the stuff needed to
239 * start encrypting, the next packet back will
241 if (!ssl2_enc_init(s
,0))
242 { ret
= -1; goto end
; }
244 s
->state
=SSL2_ST_SEND_SERVER_VERIFY_A
;
247 case SSL2_ST_SEND_SERVER_VERIFY_A
:
248 case SSL2_ST_SEND_SERVER_VERIFY_B
:
249 ret
=server_verify(s
);
250 if (ret
<= 0) goto end
;
254 /* If we are in here, we have been
255 * buffering the output, so we need to
256 * flush it and remove buffering from
258 s
->state
=SSL2_ST_SEND_SERVER_VERIFY_C
;
263 s
->state
=SSL2_ST_GET_CLIENT_FINISHED_A
;
267 case SSL2_ST_SEND_SERVER_VERIFY_C
:
268 /* get the number of bytes to write */
269 num1
=BIO_ctrl(s
->wbio
,BIO_CTRL_INFO
,0,NULL
);
272 s
->rwstate
=SSL_WRITING
;
273 num1
=BIO_flush(s
->wbio
);
274 if (num1
<= 0) { ret
= -1; goto end
; }
275 s
->rwstate
=SSL_NOTHING
;
278 /* flushed and now remove buffering */
279 s
->wbio
=BIO_pop(s
->wbio
);
281 s
->state
=SSL2_ST_GET_CLIENT_FINISHED_A
;
284 case SSL2_ST_GET_CLIENT_FINISHED_A
:
285 case SSL2_ST_GET_CLIENT_FINISHED_B
:
286 ret
=get_client_finished(s
);
290 s
->state
=SSL2_ST_SEND_REQUEST_CERTIFICATE_A
;
293 case SSL2_ST_SEND_REQUEST_CERTIFICATE_A
:
294 case SSL2_ST_SEND_REQUEST_CERTIFICATE_B
:
295 case SSL2_ST_SEND_REQUEST_CERTIFICATE_C
:
296 case SSL2_ST_SEND_REQUEST_CERTIFICATE_D
:
297 /* don't do a 'request certificate' if we
298 * don't want to, or we already have one, and
299 * we only want to do it once. */
300 if (!(s
->verify_mode
& SSL_VERIFY_PEER
) ||
301 ((s
->session
->peer
!= NULL
) &&
302 (s
->verify_mode
& SSL_VERIFY_CLIENT_ONCE
)))
304 s
->state
=SSL2_ST_SEND_SERVER_FINISHED_A
;
309 ret
=request_certificate(s
);
310 if (ret
<= 0) goto end
;
312 s
->state
=SSL2_ST_SEND_SERVER_FINISHED_A
;
316 case SSL2_ST_SEND_SERVER_FINISHED_A
:
317 case SSL2_ST_SEND_SERVER_FINISHED_B
:
318 ret
=server_finish(s
);
319 if (ret
<= 0) goto end
;
325 BUF_MEM_free(s
->init_buf
);
326 ssl_free_wbio_buffer(s
);
329 /* ERR_clear_error();*/
331 ssl_update_cache(s
,SSL_SESS_CACHE_SERVER
);
333 s
->ctx
->stats
.sess_accept_good
++;
337 if (cb
!= NULL
) cb(s
,SSL_CB_HANDSHAKE_DONE
,1);
343 SSLerr(SSL_F_SSL2_ACCEPT
,SSL_R_UNKNOWN_STATE
);
349 if ((cb
!= NULL
) && (s
->state
!= state
))
353 cb(s
,SSL_CB_ACCEPT_LOOP
,1);
360 cb(s
,SSL_CB_ACCEPT_EXIT
,ret
);
364 static int get_client_master_key(SSL
*s
)
366 int is_export
,i
,n
,keya
,ek
;
369 const SSL_CIPHER
*cp
;
373 p
=(unsigned char *)s
->init_buf
->data
;
374 if (s
->state
== SSL2_ST_GET_CLIENT_MASTER_KEY_A
)
376 i
=ssl2_read(s
,(char *)&(p
[s
->init_num
]),10-s
->init_num
);
378 if (i
< (10-s
->init_num
))
379 return(ssl2_part_read(s
,SSL_F_GET_CLIENT_MASTER_KEY
,i
));
382 if (*(p
++) != SSL2_MT_CLIENT_MASTER_KEY
)
384 if (p
[-1] != SSL2_MT_ERROR
)
386 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
387 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY
,SSL_R_READ_WRONG_PACKET_TYPE
);
390 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY
, SSL_R_PEER_ERROR
);
394 cp
=ssl2_get_cipher_by_char(p
);
397 ssl2_return_error(s
,SSL2_PE_NO_CIPHER
);
398 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY
, SSL_R_NO_CIPHER_MATCH
);
401 s
->session
->cipher
= cp
;
404 n2s(p
,i
); s
->s2
->tmp
.clear
=i
;
405 n2s(p
,i
); s
->s2
->tmp
.enc
=i
;
407 if(i
> SSL_MAX_KEY_ARG_LENGTH
)
409 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
410 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY
, SSL_R_KEY_ARG_TOO_LONG
);
413 s
->session
->key_arg_length
=i
;
414 s
->state
=SSL2_ST_GET_CLIENT_MASTER_KEY_B
;
417 /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */
418 p
=(unsigned char *)s
->init_buf
->data
;
419 if (s
->init_buf
->length
< SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER
)
421 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
422 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY
, ERR_R_INTERNAL_ERROR
);
425 keya
=s
->session
->key_arg_length
;
426 len
= 10 + (unsigned long)s
->s2
->tmp
.clear
+ (unsigned long)s
->s2
->tmp
.enc
+ (unsigned long)keya
;
427 if (len
> SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER
)
429 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
430 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY
,SSL_R_MESSAGE_TOO_LONG
);
433 n
= (int)len
- s
->init_num
;
434 i
= ssl2_read(s
,(char *)&(p
[s
->init_num
]),n
);
435 if (i
!= n
) return(ssl2_part_read(s
,SSL_F_GET_CLIENT_MASTER_KEY
,i
));
437 s
->msg_callback(0, s
->version
, 0, p
, (size_t)len
, s
, s
->msg_callback_arg
); /* CLIENT-MASTER-KEY */
440 memcpy(s
->session
->key_arg
,&(p
[s
->s2
->tmp
.clear
+s
->s2
->tmp
.enc
]),
443 if (s
->cert
->pkeys
[SSL_PKEY_RSA_ENC
].privatekey
== NULL
)
445 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
446 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY
,SSL_R_NO_PRIVATEKEY
);
449 i
=ssl_rsa_private_decrypt(s
->cert
,s
->s2
->tmp
.enc
,
450 &(p
[s
->s2
->tmp
.clear
]),&(p
[s
->s2
->tmp
.clear
]),
451 (s
->s2
->ssl2_rollback
)?RSA_SSLV23_PADDING
:RSA_PKCS1_PADDING
);
453 is_export
=SSL_C_IS_EXPORT(s
->session
->cipher
);
455 if (!ssl_cipher_get_evp(s
->session
,&c
,&md
,NULL
,NULL
,NULL
))
457 ssl2_return_error(s
,SSL2_PE_NO_CIPHER
);
458 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY
,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS
);
462 if (s
->session
->cipher
->algorithm2
& SSL2_CF_8_BYTE_ENC
)
472 /* If a bad decrypt, continue with protocol but with a
473 * random master secret (Bleichenbacher attack) */
475 ((!is_export
&& (i
!= EVP_CIPHER_key_length(c
)))
476 || (is_export
&& ((i
!= ek
) || (s
->s2
->tmp
.clear
+(unsigned int)i
!=
477 (unsigned int)EVP_CIPHER_key_length(c
))))))
483 i
=EVP_CIPHER_key_length(c
);
484 if (RAND_pseudo_bytes(p
,i
) <= 0)
491 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY
,SSL_R_BAD_RSA_DECRYPT
);
493 /* incorrect number of key bytes for non export cipher */
494 else if ((!is_export
&& (i
!= EVP_CIPHER_key_length(c
)))
495 || (is_export
&& ((i
!= ek
) || (s
->s2
->tmp
.clear
+i
!=
496 EVP_CIPHER_key_length(c
)))))
499 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY
,SSL_R_WRONG_NUMBER_OF_KEY_BITS
);
503 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
508 if (is_export
) i
+=s
->s2
->tmp
.clear
;
510 if (i
> SSL_MAX_MASTER_KEY_LENGTH
)
512 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
513 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY
, ERR_R_INTERNAL_ERROR
);
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 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
567 SSLerr(SSL_F_GET_CLIENT_HELLO
,SSL_R_INVALID_CHALLENGE_LENGTH
);
570 s
->state
=SSL2_ST_GET_CLIENT_HELLO_C
;
573 /* SSL2_ST_GET_CLIENT_HELLO_C */
574 p
=(unsigned char *)s
->init_buf
->data
;
575 len
= 9 + (unsigned long)s
->s2
->tmp
.cipher_spec_length
+ (unsigned long)s
->s2
->challenge_length
+ (unsigned long)s
->s2
->tmp
.session_id_length
;
576 if (len
> SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER
)
578 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
579 SSLerr(SSL_F_GET_CLIENT_HELLO
,SSL_R_MESSAGE_TOO_LONG
);
582 n
= (int)len
- s
->init_num
;
583 i
= ssl2_read(s
,(char *)&(p
[s
->init_num
]),n
);
584 if (i
!= n
) return(ssl2_part_read(s
,SSL_F_GET_CLIENT_HELLO
,i
));
586 s
->msg_callback(0, s
->version
, 0, p
, (size_t)len
, s
, s
->msg_callback_arg
); /* CLIENT-HELLO */
589 /* get session-id before cipher stuff so we can get out session
590 * structure if it is cached */
592 if ((s
->s2
->tmp
.session_id_length
!= 0) &&
593 (s
->s2
->tmp
.session_id_length
!= SSL2_SSL_SESSION_ID_LENGTH
))
595 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
596 SSLerr(SSL_F_GET_CLIENT_HELLO
,SSL_R_BAD_SSL_SESSION_ID_LENGTH
);
600 if (s
->s2
->tmp
.session_id_length
== 0)
602 if (!ssl_get_new_session(s
,1))
604 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
610 i
=ssl_get_prev_session(s
,&(p
[s
->s2
->tmp
.cipher_spec_length
]),
611 s
->s2
->tmp
.session_id_length
, NULL
);
613 { /* previous session */
618 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
625 ssl2_return_error(s
,SSL2_PE_NO_CERTIFICATE
);
626 SSLerr(SSL_F_GET_CLIENT_HELLO
,SSL_R_NO_CERTIFICATE_SET
);
630 if (!ssl_get_new_session(s
,1))
632 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
640 cs
=ssl_bytes_to_cipher_list(s
,p
,s
->s2
->tmp
.cipher_spec_length
,
641 &s
->session
->ciphers
);
642 if (cs
== NULL
) goto mem_err
;
644 cl
=SSL_get_ciphers(s
);
646 if (s
->options
& SSL_OP_CIPHER_SERVER_PREFERENCE
)
648 prio
=sk_SSL_CIPHER_dup(cl
);
649 if (prio
== NULL
) goto mem_err
;
657 for (z
=0; z
<sk_SSL_CIPHER_num(prio
); z
++)
659 if (sk_SSL_CIPHER_find(allow
,sk_SSL_CIPHER_value(prio
,z
)) < 0)
661 (void)sk_SSL_CIPHER_delete(prio
,z
);
665 if (s
->options
& SSL_OP_CIPHER_SERVER_PREFERENCE
)
667 sk_SSL_CIPHER_free(s
->session
->ciphers
);
668 s
->session
->ciphers
= prio
;
670 /* s->session->ciphers should now have a list of
671 * ciphers that are on both the client and server.
672 * This list is ordered by the order the client sent
673 * the ciphers or in the order of the server's preference
674 * if SSL_OP_CIPHER_SERVER_PREFERENCE was set.
677 p
+=s
->s2
->tmp
.cipher_spec_length
;
678 /* done cipher selection */
680 /* session id extracted already */
681 p
+=s
->s2
->tmp
.session_id_length
;
684 if (s
->s2
->challenge_length
> sizeof s
->s2
->challenge
)
686 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
687 SSLerr(SSL_F_GET_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
690 memcpy(s
->s2
->challenge
,p
,(unsigned int)s
->s2
->challenge_length
);
693 SSLerr(SSL_F_GET_CLIENT_HELLO
,ERR_R_MALLOC_FAILURE
);
697 static int server_hello(SSL
*s
)
702 p
=(unsigned char *)s
->init_buf
->data
;
703 if (s
->state
== SSL2_ST_SEND_SERVER_HELLO_A
)
706 *(p
++)=SSL2_MT_SERVER_HELLO
; /* type */
708 *(p
++)=(unsigned char)hit
;
712 if (s
->session
->sess_cert
!= NULL
)
713 /* This can't really happen because get_client_hello
714 * has called ssl_get_new_session, which does not set
716 ssl_sess_cert_free(s
->session
->sess_cert
);
717 s
->session
->sess_cert
= ssl_sess_cert_new();
718 if (s
->session
->sess_cert
== NULL
)
720 SSLerr(SSL_F_SERVER_HELLO
, ERR_R_MALLOC_FAILURE
);
724 /* If 'hit' is set, then s->sess_cert may be non-NULL or NULL,
725 * depending on whether it survived in the internal cache
726 * or was retrieved from an external cache.
727 * If it is NULL, we cannot put any useful data in it anyway,
728 * so we don't touch it.
731 #else /* That's what used to be done when cert_st and sess_cert_st were
734 { /* else add cert to session */
735 CRYPTO_add(&s
->cert
->references
,1,CRYPTO_LOCK_SSL_CERT
);
736 if (s
->session
->sess_cert
!= NULL
)
737 ssl_cert_free(s
->session
->sess_cert
);
738 s
->session
->sess_cert
=s
->cert
;
740 else /* We have a session id-cache hit, if the
741 * session-id has no certificate listed against
742 * the 'cert' structure, grab the 'old' one
743 * listed against the SSL connection */
745 if (s
->session
->sess_cert
== NULL
)
747 CRYPTO_add(&s
->cert
->references
,1,
748 CRYPTO_LOCK_SSL_CERT
);
749 s
->session
->sess_cert
=s
->cert
;
756 ssl2_return_error(s
,SSL2_PE_NO_CERTIFICATE
);
757 SSLerr(SSL_F_SERVER_HELLO
,SSL_R_NO_CERTIFICATE_SPECIFIED
);
763 *(p
++)=0; /* no certificate type */
764 s2n(s
->version
,p
); /* version */
765 s2n(0,p
); /* cert len */
766 s2n(0,p
); /* ciphers len */
771 /* put certificate type */
772 *(p
++)=SSL2_CT_X509_CERTIFICATE
;
773 s2n(s
->version
,p
); /* version */
774 n
=i2d_X509(s
->cert
->pkeys
[SSL_PKEY_RSA_ENC
].x509
,NULL
);
775 s2n(n
,p
); /* certificate length */
776 i2d_X509(s
->cert
->pkeys
[SSL_PKEY_RSA_ENC
].x509
,&d
);
779 /* lets send out the ciphers we like in the
781 n
=ssl_cipher_list_to_bytes(s
,s
->session
->ciphers
,d
,0);
783 s2n(n
,p
); /* add cipher length */
786 /* make and send conn_id */
787 s2n(SSL2_CONNECTION_ID_LENGTH
,p
); /* add conn_id length */
788 s
->s2
->conn_id_length
=SSL2_CONNECTION_ID_LENGTH
;
789 if (RAND_pseudo_bytes(s
->s2
->conn_id
,(int)s
->s2
->conn_id_length
) <= 0)
791 memcpy(d
,s
->s2
->conn_id
,SSL2_CONNECTION_ID_LENGTH
);
792 d
+=SSL2_CONNECTION_ID_LENGTH
;
794 s
->state
=SSL2_ST_SEND_SERVER_HELLO_B
;
795 s
->init_num
=d
-(unsigned char *)s
->init_buf
->data
;
798 /* SSL2_ST_SEND_SERVER_HELLO_B */
799 /* If we are using TCP/IP, the performance is bad if we do 2
800 * writes without a read between them. This occurs when
801 * Session-id reuse is used, so I will put in a buffering module
805 if (!ssl_init_wbio_buffer(s
,1)) return(-1);
808 return(ssl2_do_write(s
));
811 static int get_client_finished(SSL
*s
)
817 p
=(unsigned char *)s
->init_buf
->data
;
818 if (s
->state
== SSL2_ST_GET_CLIENT_FINISHED_A
)
820 i
=ssl2_read(s
,(char *)&(p
[s
->init_num
]),1-s
->init_num
);
821 if (i
< 1-s
->init_num
)
822 return(ssl2_part_read(s
,SSL_F_GET_CLIENT_FINISHED
,i
));
825 if (*p
!= SSL2_MT_CLIENT_FINISHED
)
827 if (*p
!= SSL2_MT_ERROR
)
829 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
830 SSLerr(SSL_F_GET_CLIENT_FINISHED
,SSL_R_READ_WRONG_PACKET_TYPE
);
834 SSLerr(SSL_F_GET_CLIENT_FINISHED
,SSL_R_PEER_ERROR
);
835 /* try to read the error message */
836 i
=ssl2_read(s
,(char *)&(p
[s
->init_num
]),3-s
->init_num
);
837 return ssl2_part_read(s
,SSL_F_GET_SERVER_VERIFY
,i
);
841 s
->state
=SSL2_ST_GET_CLIENT_FINISHED_B
;
844 /* SSL2_ST_GET_CLIENT_FINISHED_B */
845 if (s
->s2
->conn_id_length
> sizeof s
->s2
->conn_id
)
847 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
848 SSLerr(SSL_F_GET_CLIENT_FINISHED
, ERR_R_INTERNAL_ERROR
);
851 len
= 1 + (unsigned long)s
->s2
->conn_id_length
;
852 n
= (int)len
- s
->init_num
;
853 i
= ssl2_read(s
,(char *)&(p
[s
->init_num
]),n
);
856 return(ssl2_part_read(s
,SSL_F_GET_CLIENT_FINISHED
,i
));
859 s
->msg_callback(0, s
->version
, 0, p
, len
, s
, s
->msg_callback_arg
); /* CLIENT-FINISHED */
861 if (memcmp(p
,s
->s2
->conn_id
,s
->s2
->conn_id_length
) != 0)
863 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
864 SSLerr(SSL_F_GET_CLIENT_FINISHED
,SSL_R_CONNECTION_ID_IS_DIFFERENT
);
870 static int server_verify(SSL
*s
)
874 if (s
->state
== SSL2_ST_SEND_SERVER_VERIFY_A
)
876 p
=(unsigned char *)s
->init_buf
->data
;
877 *(p
++)=SSL2_MT_SERVER_VERIFY
;
878 if (s
->s2
->challenge_length
> sizeof s
->s2
->challenge
)
880 SSLerr(SSL_F_SERVER_VERIFY
, ERR_R_INTERNAL_ERROR
);
883 memcpy(p
,s
->s2
->challenge
,(unsigned int)s
->s2
->challenge_length
);
884 /* p+=s->s2->challenge_length; */
886 s
->state
=SSL2_ST_SEND_SERVER_VERIFY_B
;
887 s
->init_num
=s
->s2
->challenge_length
+1;
890 return(ssl2_do_write(s
));
893 static int server_finish(SSL
*s
)
897 if (s
->state
== SSL2_ST_SEND_SERVER_FINISHED_A
)
899 p
=(unsigned char *)s
->init_buf
->data
;
900 *(p
++)=SSL2_MT_SERVER_FINISHED
;
902 if (s
->session
->session_id_length
> sizeof s
->session
->session_id
)
904 SSLerr(SSL_F_SERVER_FINISH
, ERR_R_INTERNAL_ERROR
);
907 memcpy(p
,s
->session
->session_id
, (unsigned int)s
->session
->session_id_length
);
908 /* p+=s->session->session_id_length; */
910 s
->state
=SSL2_ST_SEND_SERVER_FINISHED_B
;
911 s
->init_num
=s
->session
->session_id_length
+1;
915 /* SSL2_ST_SEND_SERVER_FINISHED_B */
916 return(ssl2_do_write(s
));
919 /* send the request and check the response */
920 static int request_certificate(SSL
*s
)
922 const unsigned char *cp
;
923 unsigned char *p
,*p2
,*buf2
;
925 int i
,j
,ctype
,ret
= -1;
928 STACK_OF(X509
) *sk
=NULL
;
931 if (s
->state
== SSL2_ST_SEND_REQUEST_CERTIFICATE_A
)
933 p
=(unsigned char *)s
->init_buf
->data
;
934 *(p
++)=SSL2_MT_REQUEST_CERTIFICATE
;
935 *(p
++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION
;
936 if (RAND_pseudo_bytes(ccd
,SSL2_MIN_CERT_CHALLENGE_LENGTH
) <= 0)
938 memcpy(p
,ccd
,SSL2_MIN_CERT_CHALLENGE_LENGTH
);
940 s
->state
=SSL2_ST_SEND_REQUEST_CERTIFICATE_B
;
941 s
->init_num
=SSL2_MIN_CERT_CHALLENGE_LENGTH
+2;
945 if (s
->state
== SSL2_ST_SEND_REQUEST_CERTIFICATE_B
)
955 s
->state
=SSL2_ST_SEND_REQUEST_CERTIFICATE_C
;
958 if (s
->state
== SSL2_ST_SEND_REQUEST_CERTIFICATE_C
)
960 p
=(unsigned char *)s
->init_buf
->data
;
961 i
=ssl2_read(s
,(char *)&(p
[s
->init_num
]),6-s
->init_num
); /* try to read 6 octets ... */
962 if (i
< 3-s
->init_num
) /* ... but don't call ssl2_part_read now if we got at least 3
963 * (probably NO-CERTIFICATE-ERROR) */
965 ret
=ssl2_part_read(s
,SSL_F_REQUEST_CERTIFICATE
,i
);
970 if ((s
->init_num
>= 3) && (p
[0] == SSL2_MT_ERROR
))
973 if (i
!= SSL2_PE_NO_CERTIFICATE
)
975 /* not the error message we expected -- let ssl2_part_read handle it */
977 ret
= ssl2_part_read(s
,SSL_F_REQUEST_CERTIFICATE
, 3);
982 s
->msg_callback(0, s
->version
, 0, p
, 3, s
, s
->msg_callback_arg
); /* ERROR */
984 /* this is the one place where we can recover from an SSL 2.0 error */
986 if (s
->verify_mode
& SSL_VERIFY_FAIL_IF_NO_PEER_CERT
)
988 ssl2_return_error(s
,SSL2_PE_BAD_CERTIFICATE
);
989 SSLerr(SSL_F_REQUEST_CERTIFICATE
,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE
);
995 if ((*(p
++) != SSL2_MT_CLIENT_CERTIFICATE
) || (s
->init_num
< 6))
997 ssl2_return_error(s
,SSL2_PE_UNDEFINED_ERROR
);
998 SSLerr(SSL_F_REQUEST_CERTIFICATE
,SSL_R_SHORT_READ
);
1001 if (s
->init_num
!= 6)
1003 SSLerr(SSL_F_REQUEST_CERTIFICATE
, ERR_R_INTERNAL_ERROR
);
1007 /* ok we have a response */
1008 /* certificate type, there is only one right now. */
1010 if (ctype
!= SSL2_AT_MD5_WITH_RSA_ENCRYPTION
)
1012 ssl2_return_error(s
,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE
);
1013 SSLerr(SSL_F_REQUEST_CERTIFICATE
,SSL_R_BAD_RESPONSE_ARGUMENT
);
1016 n2s(p
,i
); s
->s2
->tmp
.clen
=i
;
1017 n2s(p
,i
); s
->s2
->tmp
.rlen
=i
;
1018 s
->state
=SSL2_ST_SEND_REQUEST_CERTIFICATE_D
;
1021 /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */
1022 p
=(unsigned char *)s
->init_buf
->data
;
1023 len
= 6 + (unsigned long)s
->s2
->tmp
.clen
+ (unsigned long)s
->s2
->tmp
.rlen
;
1024 if (len
> SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER
)
1026 SSLerr(SSL_F_REQUEST_CERTIFICATE
,SSL_R_MESSAGE_TOO_LONG
);
1029 j
= (int)len
- s
->init_num
;
1030 i
= ssl2_read(s
,(char *)&(p
[s
->init_num
]),j
);
1033 ret
=ssl2_part_read(s
,SSL_F_REQUEST_CERTIFICATE
,i
);
1036 if (s
->msg_callback
)
1037 s
->msg_callback(0, s
->version
, 0, p
, len
, s
, s
->msg_callback_arg
); /* CLIENT-CERTIFICATE */
1041 x509
=(X509
*)d2i_X509(NULL
,&cp
,(long)s
->s2
->tmp
.clen
);
1044 SSLerr(SSL_F_REQUEST_CERTIFICATE
,ERR_R_X509_LIB
);
1048 if (((sk
=sk_X509_new_null()) == NULL
) || (!sk_X509_push(sk
,x509
)))
1050 SSLerr(SSL_F_REQUEST_CERTIFICATE
,ERR_R_MALLOC_FAILURE
);
1054 i
=ssl_verify_cert_chain(s
,sk
);
1056 if (i
> 0) /* we like the packet, now check the chksum */
1059 EVP_PKEY
*pkey
=NULL
;
1061 EVP_MD_CTX_init(&ctx
);
1062 if (!EVP_VerifyInit_ex(&ctx
,s
->ctx
->rsa_md5
, NULL
)
1063 || !EVP_VerifyUpdate(&ctx
,s
->s2
->key_material
,
1064 s
->s2
->key_material_length
)
1065 || !EVP_VerifyUpdate(&ctx
,ccd
,
1066 SSL2_MIN_CERT_CHALLENGE_LENGTH
))
1069 i
=i2d_X509(s
->cert
->pkeys
[SSL_PKEY_RSA_ENC
].x509
,NULL
);
1070 buf2
=OPENSSL_malloc((unsigned int)i
);
1073 SSLerr(SSL_F_REQUEST_CERTIFICATE
,ERR_R_MALLOC_FAILURE
);
1077 i
=i2d_X509(s
->cert
->pkeys
[SSL_PKEY_RSA_ENC
].x509
,&p2
);
1078 if (!EVP_VerifyUpdate(&ctx
,buf2
,(unsigned int)i
))
1085 pkey
=X509_get_pubkey(x509
);
1086 if (pkey
== NULL
) goto end
;
1087 i
=EVP_VerifyFinal(&ctx
,cp
,s
->s2
->tmp
.rlen
,pkey
);
1088 EVP_PKEY_free(pkey
);
1089 EVP_MD_CTX_cleanup(&ctx
);
1093 if (s
->session
->peer
!= NULL
)
1094 X509_free(s
->session
->peer
);
1095 s
->session
->peer
=x509
;
1096 CRYPTO_add(&x509
->references
,1,CRYPTO_LOCK_X509
);
1097 s
->session
->verify_result
= s
->verify_result
;
1103 SSLerr(SSL_F_REQUEST_CERTIFICATE
,SSL_R_BAD_CHECKSUM
);
1110 ssl2_return_error(s
,SSL2_PE_BAD_CERTIFICATE
);
1118 static int ssl_rsa_private_decrypt(CERT
*c
, int len
, unsigned char *from
,
1119 unsigned char *to
, int padding
)
1124 if ((c
== NULL
) || (c
->pkeys
[SSL_PKEY_RSA_ENC
].privatekey
== NULL
))
1126 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT
,SSL_R_NO_PRIVATEKEY
);
1129 if (c
->pkeys
[SSL_PKEY_RSA_ENC
].privatekey
->type
!= EVP_PKEY_RSA
)
1131 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT
,SSL_R_PUBLIC_KEY_IS_NOT_RSA
);
1134 rsa
=c
->pkeys
[SSL_PKEY_RSA_ENC
].privatekey
->pkey
.rsa
;
1136 /* we have the public key */
1137 i
=RSA_private_decrypt(len
,from
,to
,rsa
,padding
);
1139 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT
,ERR_R_RSA_LIB
);
1142 #else /* !OPENSSL_NO_SSL2 */
1145 static void *dummy
=&dummy
;