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 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 SSL_METHOD *ssl2_get_server_method(int ver)
134 if (ver == SSL2_VERSION)
135 return(SSLv2_server_method());
140 SSL_METHOD *SSLv2_server_method(void)
143 static SSL_METHOD SSLv2_server_data;
147 CRYPTO_w_lock(CRYPTO_LOCK_SSL_METHOD);
151 memcpy((char *)&SSLv2_server_data,(char *)sslv2_base_method(),
153 SSLv2_server_data.ssl_accept=ssl2_accept;
154 SSLv2_server_data.get_ssl_method=ssl2_get_server_method;
158 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_METHOD);
160 return(&SSLv2_server_data);
163 int ssl2_accept(SSL *s)
165 unsigned long l=time(NULL);
169 void (*cb)(const SSL *ssl,int type,int val)=NULL;
172 RAND_add(&l,sizeof(l),0);
176 if (s->info_callback != NULL)
178 else if (s->ctx->info_callback != NULL)
179 cb=s->ctx->info_callback;
181 /* init things to blank */
183 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
187 SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
200 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
201 case SSL_ST_OK|SSL_ST_ACCEPT:
204 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
206 s->version=SSL2_VERSION;
207 s->type=SSL_ST_ACCEPT;
210 if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
211 { ret= -1; goto end; }
212 if (!BUF_MEM_grow(buf,(int)
213 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
214 { ret= -1; goto end; }
217 s->ctx->stats.sess_accept++;
218 s->handshake_func=ssl2_accept;
219 s->state=SSL2_ST_GET_CLIENT_HELLO_A;
222 case SSL2_ST_GET_CLIENT_HELLO_A:
223 case SSL2_ST_GET_CLIENT_HELLO_B:
224 case SSL2_ST_GET_CLIENT_HELLO_C:
226 ret=get_client_hello(s);
227 if (ret <= 0) goto end;
229 s->state=SSL2_ST_SEND_SERVER_HELLO_A;
232 case SSL2_ST_SEND_SERVER_HELLO_A:
233 case SSL2_ST_SEND_SERVER_HELLO_B:
235 if (ret <= 0) goto end;
239 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_A;
244 s->state=SSL2_ST_SERVER_START_ENCRYPTION;
247 case SSL2_ST_GET_CLIENT_MASTER_KEY_A:
248 case SSL2_ST_GET_CLIENT_MASTER_KEY_B:
249 ret=get_client_master_key(s);
250 if (ret <= 0) goto end;
252 s->state=SSL2_ST_SERVER_START_ENCRYPTION;
255 case SSL2_ST_SERVER_START_ENCRYPTION:
256 /* Ok we how have sent all the stuff needed to
257 * start encrypting, the next packet back will
259 if (!ssl2_enc_init(s,0))
260 { ret= -1; goto end; }
262 s->state=SSL2_ST_SEND_SERVER_VERIFY_A;
265 case SSL2_ST_SEND_SERVER_VERIFY_A:
266 case SSL2_ST_SEND_SERVER_VERIFY_B:
267 ret=server_verify(s);
268 if (ret <= 0) goto end;
272 /* If we are in here, we have been
273 * buffering the output, so we need to
274 * flush it and remove buffering from
276 s->state=SSL2_ST_SEND_SERVER_VERIFY_C;
281 s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
285 case SSL2_ST_SEND_SERVER_VERIFY_C:
286 /* get the number of bytes to write */
287 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
290 s->rwstate=SSL_WRITING;
291 num1=BIO_flush(s->wbio);
292 if (num1 <= 0) { ret= -1; goto end; }
293 s->rwstate=SSL_NOTHING;
296 /* flushed and now remove buffering */
297 s->wbio=BIO_pop(s->wbio);
299 s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
302 case SSL2_ST_GET_CLIENT_FINISHED_A:
303 case SSL2_ST_GET_CLIENT_FINISHED_B:
304 ret=get_client_finished(s);
308 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_A;
311 case SSL2_ST_SEND_REQUEST_CERTIFICATE_A:
312 case SSL2_ST_SEND_REQUEST_CERTIFICATE_B:
313 case SSL2_ST_SEND_REQUEST_CERTIFICATE_C:
314 case SSL2_ST_SEND_REQUEST_CERTIFICATE_D:
315 /* don't do a 'request certificate' if we
316 * don't want to, or we already have one, and
317 * we only want to do it once. */
318 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
319 ((s->session->peer != NULL) &&
320 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
322 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
327 ret=request_certificate(s);
328 if (ret <= 0) goto end;
330 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
334 case SSL2_ST_SEND_SERVER_FINISHED_A:
335 case SSL2_ST_SEND_SERVER_FINISHED_B:
336 ret=server_finish(s);
337 if (ret <= 0) goto end;
343 BUF_MEM_free(s->init_buf);
344 ssl_free_wbio_buffer(s);
347 /* ERR_clear_error();*/
349 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
351 s->ctx->stats.sess_accept_good++;
355 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
361 SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_UNKNOWN_STATE);
367 if ((cb != NULL) && (s->state != state))
371 cb(s,SSL_CB_ACCEPT_LOOP,1);
378 cb(s,SSL_CB_ACCEPT_EXIT,ret);
382 static int get_client_master_key(SSL *s)
384 int is_export,i,n,keya,ek;
391 p=(unsigned char *)s->init_buf->data;
392 if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A)
394 i=ssl2_read(s,(char *)&(p[s->init_num]),10-s->init_num);
396 if (i < (10-s->init_num))
397 return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
400 if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY)
402 if (p[-1] != SSL2_MT_ERROR)
404 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
405 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_READ_WRONG_PACKET_TYPE);
408 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_PEER_ERROR);
412 cp=ssl2_get_cipher_by_char(p);
415 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
416 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_CIPHER_MATCH);
419 s->session->cipher= cp;
422 n2s(p,i); s->s2->tmp.clear=i;
423 n2s(p,i); s->s2->tmp.enc=i;
424 n2s(p,i); s->session->key_arg_length=i;
425 if(s->session->key_arg_length > SSL_MAX_KEY_ARG_LENGTH)
427 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
428 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_KEY_ARG_TOO_LONG);
431 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B;
434 /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */
435 p=(unsigned char *)s->init_buf->data;
436 if (s->init_buf->length < SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
438 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
439 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
442 keya=s->session->key_arg_length;
443 len = 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc + (unsigned long)keya;
444 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
446 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
447 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG);
450 n = (int)len - s->init_num;
451 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
452 if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
454 s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-MASTER-KEY */
457 memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]),
460 if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)
462 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
463 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY);
466 i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc,
467 &(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]),
468 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
470 is_export=SSL_C_IS_EXPORT(s->session->cipher);
472 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))
474 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
475 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
479 if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
489 /* If a bad decrypt, continue with protocol but with a
490 * random master secret (Bleichenbacher attack) */
492 ((!is_export && (i != EVP_CIPHER_key_length(c)))
493 || (is_export && ((i != ek) || (s->s2->tmp.clear+(unsigned int)i !=
494 (unsigned int)EVP_CIPHER_key_length(c))))))
500 i=EVP_CIPHER_key_length(c);
501 RAND_pseudo_bytes(p,i);
507 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT);
509 /* incorrect number of key bytes for non export cipher */
510 else if ((!is_export && (i != EVP_CIPHER_key_length(c)))
511 || (is_export && ((i != ek) || (s->s2->tmp.clear+i !=
512 EVP_CIPHER_key_length(c)))))
515 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS);
519 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
524 if (is_export) i+=s->s2->tmp.clear;
526 if (i > SSL_MAX_MASTER_KEY_LENGTH)
528 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
529 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
532 s->session->master_key_length=i;
533 memcpy(s->session->master_key,p,(unsigned int)i);
537 static int get_client_hello(SSL *s)
542 STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */
543 STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */
544 STACK_OF(SSL_CIPHER) *prio, *allow;
547 /* This is a bit of a hack to check for the correct packet
548 * type the first time round. */
549 if (s->state == SSL2_ST_GET_CLIENT_HELLO_A)
552 s->state=SSL2_ST_GET_CLIENT_HELLO_B;
555 p=(unsigned char *)s->init_buf->data;
556 if (s->state == SSL2_ST_GET_CLIENT_HELLO_B)
558 i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num);
559 if (i < (9-s->init_num))
560 return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
563 if (*(p++) != SSL2_MT_CLIENT_HELLO)
565 if (p[-1] != SSL2_MT_ERROR)
567 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
568 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE);
571 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR);
575 if (i < s->version) s->version=i;
576 n2s(p,i); s->s2->tmp.cipher_spec_length=i;
577 n2s(p,i); s->s2->tmp.session_id_length=i;
578 n2s(p,i); s->s2->challenge_length=i;
579 if ( (i < SSL2_MIN_CHALLENGE_LENGTH) ||
580 (i > SSL2_MAX_CHALLENGE_LENGTH))
582 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
583 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH);
586 s->state=SSL2_ST_GET_CLIENT_HELLO_C;
589 /* SSL2_ST_GET_CLIENT_HELLO_C */
590 p=(unsigned char *)s->init_buf->data;
591 len = 9 + (unsigned long)s->s2->tmp.cipher_spec_length + (unsigned long)s->s2->challenge_length + (unsigned long)s->s2->tmp.session_id_length;
592 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
594 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
595 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_MESSAGE_TOO_LONG);
598 n = (int)len - s->init_num;
599 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
600 if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
602 s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-HELLO */
605 /* get session-id before cipher stuff so we can get out session
606 * structure if it is cached */
608 if ((s->s2->tmp.session_id_length != 0) &&
609 (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH))
611 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
612 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH);
616 if (s->s2->tmp.session_id_length == 0)
618 if (!ssl_get_new_session(s,1))
620 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
626 i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]),
627 s->s2->tmp.session_id_length);
629 { /* previous session */
634 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
641 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
642 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET);
646 if (!ssl_get_new_session(s,1))
648 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
656 cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length,
657 &s->session->ciphers);
658 if (cs == NULL) goto mem_err;
660 cl=SSL_get_ciphers(s);
662 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
664 prio=sk_SSL_CIPHER_dup(cl);
665 if (prio == NULL) goto mem_err;
673 for (z=0; z<sk_SSL_CIPHER_num(prio); z++)
675 if (sk_SSL_CIPHER_find(allow,sk_SSL_CIPHER_value(prio,z)) < 0)
677 sk_SSL_CIPHER_delete(prio,z);
681 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
683 sk_SSL_CIPHER_free(s->session->ciphers);
684 s->session->ciphers = prio;
686 /* s->session->ciphers should now have a list of
687 * ciphers that are on both the client and server.
688 * This list is ordered by the order the client sent
689 * the ciphers or in the order of the server's preference
690 * if SSL_OP_CIPHER_SERVER_PREFERENCE was set.
693 p+=s->s2->tmp.cipher_spec_length;
694 /* done cipher selection */
696 /* session id extracted already */
697 p+=s->s2->tmp.session_id_length;
700 if (s->s2->challenge_length > sizeof s->s2->challenge)
702 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
703 SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
706 memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length);
709 SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
713 static int server_hello(SSL *s)
717 STACK_OF(SSL_CIPHER) *sk;
719 p=(unsigned char *)s->init_buf->data;
720 if (s->state == SSL2_ST_SEND_SERVER_HELLO_A)
723 *(p++)=SSL2_MT_SERVER_HELLO; /* type */
725 *(p++)=(unsigned char)hit;
729 if (s->session->sess_cert != NULL)
730 /* This can't really happen because get_client_hello
731 * has called ssl_get_new_session, which does not set
733 ssl_sess_cert_free(s->session->sess_cert);
734 s->session->sess_cert = ssl_sess_cert_new();
735 if (s->session->sess_cert == NULL)
737 SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE);
741 /* If 'hit' is set, then s->sess_cert may be non-NULL or NULL,
742 * depending on whether it survived in the internal cache
743 * or was retrieved from an external cache.
744 * If it is NULL, we cannot put any useful data in it anyway,
745 * so we don't touch it.
748 #else /* That's what used to be done when cert_st and sess_cert_st were
751 { /* else add cert to session */
752 CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
753 if (s->session->sess_cert != NULL)
754 ssl_cert_free(s->session->sess_cert);
755 s->session->sess_cert=s->cert;
757 else /* We have a session id-cache hit, if the
758 * session-id has no certificate listed against
759 * the 'cert' structure, grab the 'old' one
760 * listed against the SSL connection */
762 if (s->session->sess_cert == NULL)
764 CRYPTO_add(&s->cert->references,1,
765 CRYPTO_LOCK_SSL_CERT);
766 s->session->sess_cert=s->cert;
773 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
774 SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED);
780 *(p++)=0; /* no certificate type */
781 s2n(s->version,p); /* version */
782 s2n(0,p); /* cert len */
783 s2n(0,p); /* ciphers len */
788 /* put certificate type */
789 *(p++)=SSL2_CT_X509_CERTIFICATE;
790 s2n(s->version,p); /* version */
791 n=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
792 s2n(n,p); /* certificate length */
793 i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&d);
796 /* lets send out the ciphers we like in the
798 sk= s->session->ciphers;
799 n=ssl_cipher_list_to_bytes(s,s->session->ciphers,d);
801 s2n(n,p); /* add cipher length */
804 /* make and send conn_id */
805 s2n(SSL2_CONNECTION_ID_LENGTH,p); /* add conn_id length */
806 s->s2->conn_id_length=SSL2_CONNECTION_ID_LENGTH;
807 RAND_pseudo_bytes(s->s2->conn_id,(int)s->s2->conn_id_length);
808 memcpy(d,s->s2->conn_id,SSL2_CONNECTION_ID_LENGTH);
809 d+=SSL2_CONNECTION_ID_LENGTH;
811 s->state=SSL2_ST_SEND_SERVER_HELLO_B;
812 s->init_num=d-(unsigned char *)s->init_buf->data;
815 /* SSL2_ST_SEND_SERVER_HELLO_B */
816 /* If we are using TCP/IP, the performance is bad if we do 2
817 * writes without a read between them. This occurs when
818 * Session-id reuse is used, so I will put in a buffering module
822 if (!ssl_init_wbio_buffer(s,1)) return(-1);
825 return(ssl2_do_write(s));
828 static int get_client_finished(SSL *s)
834 p=(unsigned char *)s->init_buf->data;
835 if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A)
837 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
838 if (i < 1-s->init_num)
839 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
842 if (*p != SSL2_MT_CLIENT_FINISHED)
844 if (*p != SSL2_MT_ERROR)
846 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
847 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
851 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_PEER_ERROR);
852 /* try to read the error message */
853 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
854 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
858 s->state=SSL2_ST_GET_CLIENT_FINISHED_B;
861 /* SSL2_ST_GET_CLIENT_FINISHED_B */
862 if (s->s2->conn_id_length > sizeof s->s2->conn_id)
864 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
865 SSLerr(SSL_F_GET_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
868 len = 1 + (unsigned long)s->s2->conn_id_length;
869 n = (int)len - s->init_num;
870 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
873 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
876 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-FINISHED */
878 if (memcmp(p,s->s2->conn_id,s->s2->conn_id_length) != 0)
880 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
881 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_CONNECTION_ID_IS_DIFFERENT);
887 static int server_verify(SSL *s)
891 if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A)
893 p=(unsigned char *)s->init_buf->data;
894 *(p++)=SSL2_MT_SERVER_VERIFY;
895 if (s->s2->challenge_length > sizeof s->s2->challenge)
897 SSLerr(SSL_F_SERVER_VERIFY, ERR_R_INTERNAL_ERROR);
900 memcpy(p,s->s2->challenge,(unsigned int)s->s2->challenge_length);
901 /* p+=s->s2->challenge_length; */
903 s->state=SSL2_ST_SEND_SERVER_VERIFY_B;
904 s->init_num=s->s2->challenge_length+1;
907 return(ssl2_do_write(s));
910 static int server_finish(SSL *s)
914 if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A)
916 p=(unsigned char *)s->init_buf->data;
917 *(p++)=SSL2_MT_SERVER_FINISHED;
919 if (s->session->session_id_length > sizeof s->session->session_id)
921 SSLerr(SSL_F_SERVER_FINISH, ERR_R_INTERNAL_ERROR);
924 memcpy(p,s->session->session_id, (unsigned int)s->session->session_id_length);
925 /* p+=s->session->session_id_length; */
927 s->state=SSL2_ST_SEND_SERVER_FINISHED_B;
928 s->init_num=s->session->session_id_length+1;
932 /* SSL2_ST_SEND_SERVER_FINISHED_B */
933 return(ssl2_do_write(s));
936 /* send the request and check the response */
937 static int request_certificate(SSL *s)
939 unsigned char *p,*p2,*buf2;
941 int i,j,ctype,ret= -1;
944 STACK_OF(X509) *sk=NULL;
947 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A)
949 p=(unsigned char *)s->init_buf->data;
950 *(p++)=SSL2_MT_REQUEST_CERTIFICATE;
951 *(p++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION;
952 RAND_pseudo_bytes(ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
953 memcpy(p,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
955 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_B;
956 s->init_num=SSL2_MIN_CERT_CHALLENGE_LENGTH+2;
960 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B)
970 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_C;
973 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C)
975 p=(unsigned char *)s->init_buf->data;
976 i=ssl2_read(s,(char *)&(p[s->init_num]),6-s->init_num); /* try to read 6 octets ... */
977 if (i < 3-s->init_num) /* ... but don't call ssl2_part_read now if we got at least 3
978 * (probably NO-CERTIFICATE-ERROR) */
980 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
985 if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR))
988 if (i != SSL2_PE_NO_CERTIFICATE)
990 /* not the error message we expected -- let ssl2_part_read handle it */
992 ret = ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE, 3);
997 s->msg_callback(0, s->version, 0, p, 3, s, s->msg_callback_arg); /* ERROR */
999 /* this is the one place where we can recover from an SSL 2.0 error */
1001 if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)
1003 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
1004 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
1010 if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6))
1012 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
1013 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_SHORT_READ);
1016 if (s->init_num != 6)
1018 SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR);
1022 /* ok we have a response */
1023 /* certificate type, there is only one right now. */
1025 if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
1027 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
1028 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_RESPONSE_ARGUMENT);
1031 n2s(p,i); s->s2->tmp.clen=i;
1032 n2s(p,i); s->s2->tmp.rlen=i;
1033 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_D;
1036 /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */
1037 p=(unsigned char *)s->init_buf->data;
1038 len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen;
1039 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
1041 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_MESSAGE_TOO_LONG);
1044 j = (int)len - s->init_num;
1045 i = ssl2_read(s,(char *)&(p[s->init_num]),j);
1048 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
1051 if (s->msg_callback)
1052 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-CERTIFICATE */
1055 x509=(X509 *)d2i_X509(NULL,&p,(long)s->s2->tmp.clen);
1058 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_X509_LIB);
1062 if (((sk=sk_X509_new_null()) == NULL) || (!sk_X509_push(sk,x509)))
1064 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1068 i=ssl_verify_cert_chain(s,sk);
1070 if (i) /* we like the packet, now check the chksum */
1073 EVP_PKEY *pkey=NULL;
1075 EVP_MD_CTX_init(&ctx);
1076 EVP_VerifyInit_ex(&ctx,s->ctx->rsa_md5, NULL);
1077 EVP_VerifyUpdate(&ctx,s->s2->key_material,
1078 s->s2->key_material_length);
1079 EVP_VerifyUpdate(&ctx,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
1081 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
1082 buf2=OPENSSL_malloc((unsigned int)i);
1085 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1089 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2);
1090 EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i);
1093 pkey=X509_get_pubkey(x509);
1094 if (pkey == NULL) goto end;
1095 i=EVP_VerifyFinal(&ctx,p,s->s2->tmp.rlen,pkey);
1096 EVP_PKEY_free(pkey);
1097 EVP_MD_CTX_cleanup(&ctx);
1101 if (s->session->peer != NULL)
1102 X509_free(s->session->peer);
1103 s->session->peer=x509;
1104 CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
1105 s->session->verify_result = s->verify_result;
1111 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_CHECKSUM);
1118 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
1126 static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
1127 unsigned char *to, int padding)
1132 if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL))
1134 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_NO_PRIVATEKEY);
1137 if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA)
1139 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
1142 rsa=c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa;
1144 /* we have the public key */
1145 i=RSA_private_decrypt(len,from,to,rsa,padding);
1147 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,ERR_R_RSA_LIB);
1150 #else /* !OPENSSL_NO_SSL2 */
1153 static void *dummy=&dummy;