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 memcpy((char *)&SSLv2_server_data,(char *)sslv2_base_method(),
149 SSLv2_server_data.ssl_accept=ssl2_accept;
150 SSLv2_server_data.get_ssl_method=ssl2_get_server_method;
153 return(&SSLv2_server_data);
156 int ssl2_accept(SSL *s)
158 unsigned long l=time(NULL);
162 void (*cb)(const SSL *ssl,int type,int val)=NULL;
165 RAND_add(&l,sizeof(l),0);
169 if (s->info_callback != NULL)
171 else if (s->ctx->info_callback != NULL)
172 cb=s->ctx->info_callback;
174 /* init things to blank */
176 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
180 SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
193 case SSL_ST_BEFORE|SSL_ST_ACCEPT:
194 case SSL_ST_OK|SSL_ST_ACCEPT:
197 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
199 s->version=SSL2_VERSION;
200 s->type=SSL_ST_ACCEPT;
203 if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
204 { ret= -1; goto end; }
205 if (!BUF_MEM_grow(buf,(int)
206 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
207 { ret= -1; goto end; }
210 s->ctx->stats.sess_accept++;
211 s->handshake_func=ssl2_accept;
212 s->state=SSL2_ST_GET_CLIENT_HELLO_A;
215 case SSL2_ST_GET_CLIENT_HELLO_A:
216 case SSL2_ST_GET_CLIENT_HELLO_B:
217 case SSL2_ST_GET_CLIENT_HELLO_C:
219 ret=get_client_hello(s);
220 if (ret <= 0) goto end;
222 s->state=SSL2_ST_SEND_SERVER_HELLO_A;
225 case SSL2_ST_SEND_SERVER_HELLO_A:
226 case SSL2_ST_SEND_SERVER_HELLO_B:
228 if (ret <= 0) goto end;
232 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_A;
237 s->state=SSL2_ST_SERVER_START_ENCRYPTION;
240 case SSL2_ST_GET_CLIENT_MASTER_KEY_A:
241 case SSL2_ST_GET_CLIENT_MASTER_KEY_B:
242 ret=get_client_master_key(s);
243 if (ret <= 0) goto end;
245 s->state=SSL2_ST_SERVER_START_ENCRYPTION;
248 case SSL2_ST_SERVER_START_ENCRYPTION:
249 /* Ok we how have sent all the stuff needed to
250 * start encrypting, the next packet back will
252 if (!ssl2_enc_init(s,0))
253 { ret= -1; goto end; }
255 s->state=SSL2_ST_SEND_SERVER_VERIFY_A;
258 case SSL2_ST_SEND_SERVER_VERIFY_A:
259 case SSL2_ST_SEND_SERVER_VERIFY_B:
260 ret=server_verify(s);
261 if (ret <= 0) goto end;
265 /* If we are in here, we have been
266 * buffering the output, so we need to
267 * flush it and remove buffering from
269 s->state=SSL2_ST_SEND_SERVER_VERIFY_C;
274 s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
278 case SSL2_ST_SEND_SERVER_VERIFY_C:
279 /* get the number of bytes to write */
280 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
283 s->rwstate=SSL_WRITING;
284 num1=BIO_flush(s->wbio);
285 if (num1 <= 0) { ret= -1; goto end; }
286 s->rwstate=SSL_NOTHING;
289 /* flushed and now remove buffering */
290 s->wbio=BIO_pop(s->wbio);
292 s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
295 case SSL2_ST_GET_CLIENT_FINISHED_A:
296 case SSL2_ST_GET_CLIENT_FINISHED_B:
297 ret=get_client_finished(s);
301 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_A;
304 case SSL2_ST_SEND_REQUEST_CERTIFICATE_A:
305 case SSL2_ST_SEND_REQUEST_CERTIFICATE_B:
306 case SSL2_ST_SEND_REQUEST_CERTIFICATE_C:
307 case SSL2_ST_SEND_REQUEST_CERTIFICATE_D:
308 /* don't do a 'request certificate' if we
309 * don't want to, or we already have one, and
310 * we only want to do it once. */
311 if (!(s->verify_mode & SSL_VERIFY_PEER) ||
312 ((s->session->peer != NULL) &&
313 (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
315 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
320 ret=request_certificate(s);
321 if (ret <= 0) goto end;
323 s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
327 case SSL2_ST_SEND_SERVER_FINISHED_A:
328 case SSL2_ST_SEND_SERVER_FINISHED_B:
329 ret=server_finish(s);
330 if (ret <= 0) goto end;
336 BUF_MEM_free(s->init_buf);
337 ssl_free_wbio_buffer(s);
340 /* ERR_clear_error();*/
342 ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
344 s->ctx->stats.sess_accept_good++;
348 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
354 SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_UNKNOWN_STATE);
360 if ((cb != NULL) && (s->state != state))
364 cb(s,SSL_CB_ACCEPT_LOOP,1);
371 cb(s,SSL_CB_ACCEPT_EXIT,ret);
375 static int get_client_master_key(SSL *s)
377 int is_export,i,n,keya,ek;
384 p=(unsigned char *)s->init_buf->data;
385 if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A)
387 i=ssl2_read(s,(char *)&(p[s->init_num]),10-s->init_num);
389 if (i < (10-s->init_num))
390 return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
393 if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY)
395 if (p[-1] != SSL2_MT_ERROR)
397 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
398 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_READ_WRONG_PACKET_TYPE);
401 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,
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,
411 SSL_R_NO_CIPHER_MATCH);
414 s->session->cipher= cp;
417 n2s(p,i); s->s2->tmp.clear=i;
418 n2s(p,i); s->s2->tmp.enc=i;
419 n2s(p,i); s->session->key_arg_length=i;
420 s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B;
423 /* SSL2_ST_GET_CLIENT_MASTER_KEY_B */
424 p=(unsigned char *)s->init_buf->data;
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 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG);
432 n = (int)len - s->init_num;
433 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
434 if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
436 s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-MASTER-KEY */
439 memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]),
442 if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)
444 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
445 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY);
448 i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc,
449 &(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]),
450 (s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
452 is_export=SSL_C_IS_EXPORT(s->session->cipher);
454 if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))
456 ssl2_return_error(s,SSL2_PE_NO_CIPHER);
457 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
461 if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
471 /* If a bad decrypt, continue with protocol but with a
472 * random master secret (Bleichenbacher attack) */
474 ((!is_export && (i != EVP_CIPHER_key_length(c)))
475 || (is_export && ((i != ek) || (s->s2->tmp.clear+(unsigned int)i !=
476 (unsigned int)EVP_CIPHER_key_length(c))))))
482 i=EVP_CIPHER_key_length(c);
483 RAND_pseudo_bytes(p,i);
489 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT);
491 /* incorrect number of key bytes for non export cipher */
492 else if ((!is_export && (i != EVP_CIPHER_key_length(c)))
493 || (is_export && ((i != ek) || (s->s2->tmp.clear+i !=
494 EVP_CIPHER_key_length(c)))))
497 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS);
501 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
506 if (is_export) i+=s->s2->tmp.clear;
507 s->session->master_key_length=i;
508 memcpy(s->session->master_key,p,(unsigned int)i);
512 static int get_client_hello(SSL *s)
517 STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */
518 STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */
519 STACK_OF(SSL_CIPHER) *prio, *allow;
522 /* This is a bit of a hack to check for the correct packet
523 * type the first time round. */
524 if (s->state == SSL2_ST_GET_CLIENT_HELLO_A)
527 s->state=SSL2_ST_GET_CLIENT_HELLO_B;
530 p=(unsigned char *)s->init_buf->data;
531 if (s->state == SSL2_ST_GET_CLIENT_HELLO_B)
533 i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num);
534 if (i < (9-s->init_num))
535 return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
538 if (*(p++) != SSL2_MT_CLIENT_HELLO)
540 if (p[-1] != SSL2_MT_ERROR)
542 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
543 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE);
546 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR);
550 if (i < s->version) s->version=i;
551 n2s(p,i); s->s2->tmp.cipher_spec_length=i;
552 n2s(p,i); s->s2->tmp.session_id_length=i;
553 n2s(p,i); s->s2->challenge_length=i;
554 if ( (i < SSL2_MIN_CHALLENGE_LENGTH) ||
555 (i > SSL2_MAX_CHALLENGE_LENGTH))
557 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH);
560 s->state=SSL2_ST_GET_CLIENT_HELLO_C;
563 /* SSL2_ST_GET_CLIENT_HELLO_C */
564 p=(unsigned char *)s->init_buf->data;
565 len = 9 + (unsigned long)s->s2->tmp.cipher_spec_length + (unsigned long)s->s2->challenge_length + (unsigned long)s->s2->tmp.session_id_length;
566 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
568 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_MESSAGE_TOO_LONG);
571 n = (int)len - s->init_num;
572 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
573 if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
575 s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-HELLO */
578 /* get session-id before cipher stuff so we can get out session
579 * structure if it is cached */
581 if ((s->s2->tmp.session_id_length != 0) &&
582 (s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH))
584 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
585 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH);
589 if (s->s2->tmp.session_id_length == 0)
591 if (!ssl_get_new_session(s,1))
593 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
599 i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]),
600 s->s2->tmp.session_id_length);
602 { /* previous session */
607 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
614 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
615 SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET);
619 if (!ssl_get_new_session(s,1))
621 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
629 cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length,
630 &s->session->ciphers);
631 if (cs == NULL) goto mem_err;
633 cl=SSL_get_ciphers(s);
635 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
637 prio=sk_SSL_CIPHER_dup(cl);
638 if (prio == NULL) goto mem_err;
646 for (z=0; z<sk_SSL_CIPHER_num(prio); z++)
648 if (sk_SSL_CIPHER_find(allow,sk_SSL_CIPHER_value(prio,z)) < 0)
650 sk_SSL_CIPHER_delete(prio,z);
654 if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
656 sk_SSL_CIPHER_free(s->session->ciphers);
657 s->session->ciphers = prio;
659 /* s->session->ciphers should now have a list of
660 * ciphers that are on both the client and server.
661 * This list is ordered by the order the client sent
662 * the ciphers or in the order of the server's preference
663 * if SSL_OP_CIPHER_SERVER_PREFERENCE was set.
666 p+=s->s2->tmp.cipher_spec_length;
667 /* done cipher selection */
669 /* session id extracted already */
670 p+=s->s2->tmp.session_id_length;
673 memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length);
676 SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
680 static int server_hello(SSL *s)
684 STACK_OF(SSL_CIPHER) *sk;
686 p=(unsigned char *)s->init_buf->data;
687 if (s->state == SSL2_ST_SEND_SERVER_HELLO_A)
690 *(p++)=SSL2_MT_SERVER_HELLO; /* type */
692 *(p++)=(unsigned char)hit;
696 if (s->session->sess_cert != NULL)
697 /* This can't really happen because get_client_hello
698 * has called ssl_get_new_session, which does not set
700 ssl_sess_cert_free(s->session->sess_cert);
701 s->session->sess_cert = ssl_sess_cert_new();
702 if (s->session->sess_cert == NULL)
704 SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE);
708 /* If 'hit' is set, then s->sess_cert may be non-NULL or NULL,
709 * depending on whether it survived in the internal cache
710 * or was retrieved from an external cache.
711 * If it is NULL, we cannot put any useful data in it anyway,
712 * so we don't touch it.
715 #else /* That's what used to be done when cert_st and sess_cert_st were
718 { /* else add cert to session */
719 CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
720 if (s->session->sess_cert != NULL)
721 ssl_cert_free(s->session->sess_cert);
722 s->session->sess_cert=s->cert;
724 else /* We have a session id-cache hit, if the
725 * session-id has no certificate listed against
726 * the 'cert' structure, grab the 'old' one
727 * listed against the SSL connection */
729 if (s->session->sess_cert == NULL)
731 CRYPTO_add(&s->cert->references,1,
732 CRYPTO_LOCK_SSL_CERT);
733 s->session->sess_cert=s->cert;
740 ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
741 SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED);
747 *(p++)=0; /* no certificate type */
748 s2n(s->version,p); /* version */
749 s2n(0,p); /* cert len */
750 s2n(0,p); /* ciphers len */
755 /* put certificate type */
756 *(p++)=SSL2_CT_X509_CERTIFICATE;
757 s2n(s->version,p); /* version */
758 n=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
759 s2n(n,p); /* certificate length */
760 i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&d);
763 /* lets send out the ciphers we like in the
765 sk= s->session->ciphers;
766 n=ssl_cipher_list_to_bytes(s,s->session->ciphers,d);
768 s2n(n,p); /* add cipher length */
771 /* make and send conn_id */
772 s2n(SSL2_CONNECTION_ID_LENGTH,p); /* add conn_id length */
773 s->s2->conn_id_length=SSL2_CONNECTION_ID_LENGTH;
774 RAND_pseudo_bytes(s->s2->conn_id,(int)s->s2->conn_id_length);
775 memcpy(d,s->s2->conn_id,SSL2_CONNECTION_ID_LENGTH);
776 d+=SSL2_CONNECTION_ID_LENGTH;
778 s->state=SSL2_ST_SEND_SERVER_HELLO_B;
779 s->init_num=d-(unsigned char *)s->init_buf->data;
782 /* SSL2_ST_SEND_SERVER_HELLO_B */
783 /* If we are using TCP/IP, the performance is bad if we do 2
784 * writes without a read between them. This occurs when
785 * Session-id reuse is used, so I will put in a buffering module
789 if (!ssl_init_wbio_buffer(s,1)) return(-1);
792 return(ssl2_do_write(s));
795 static int get_client_finished(SSL *s)
801 p=(unsigned char *)s->init_buf->data;
802 if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A)
804 i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
805 if (i < 1-s->init_num)
806 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
809 if (*p != SSL2_MT_CLIENT_FINISHED)
811 if (*p != SSL2_MT_ERROR)
813 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
814 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
818 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_PEER_ERROR);
819 /* try to read the error message */
820 i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
821 return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
825 s->state=SSL2_ST_GET_CLIENT_FINISHED_B;
828 /* SSL2_ST_GET_CLIENT_FINISHED_B */
829 len = 1 + (unsigned long)s->s2->conn_id_length;
830 n = (int)len - s->init_num;
831 i = ssl2_read(s,(char *)&(p[s->init_num]),n);
834 return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
837 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-FINISHED */
839 if (memcmp(p,s->s2->conn_id,(unsigned int)s->s2->conn_id_length) != 0)
841 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
842 SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_CONNECTION_ID_IS_DIFFERENT);
848 static int server_verify(SSL *s)
852 if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A)
854 p=(unsigned char *)s->init_buf->data;
855 *(p++)=SSL2_MT_SERVER_VERIFY;
856 memcpy(p,s->s2->challenge,(unsigned int)s->s2->challenge_length);
857 /* p+=s->s2->challenge_length; */
859 s->state=SSL2_ST_SEND_SERVER_VERIFY_B;
860 s->init_num=s->s2->challenge_length+1;
863 return(ssl2_do_write(s));
866 static int server_finish(SSL *s)
870 if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A)
872 p=(unsigned char *)s->init_buf->data;
873 *(p++)=SSL2_MT_SERVER_FINISHED;
875 memcpy(p,s->session->session_id,
876 (unsigned int)s->session->session_id_length);
877 /* p+=s->session->session_id_length; */
879 s->state=SSL2_ST_SEND_SERVER_FINISHED_B;
880 s->init_num=s->session->session_id_length+1;
884 /* SSL2_ST_SEND_SERVER_FINISHED_B */
885 return(ssl2_do_write(s));
888 /* send the request and check the response */
889 static int request_certificate(SSL *s)
891 unsigned char *p,*p2,*buf2;
893 int i,j,ctype,ret= -1;
896 STACK_OF(X509) *sk=NULL;
899 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A)
901 p=(unsigned char *)s->init_buf->data;
902 *(p++)=SSL2_MT_REQUEST_CERTIFICATE;
903 *(p++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION;
904 RAND_pseudo_bytes(ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
905 memcpy(p,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
907 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_B;
908 s->init_num=SSL2_MIN_CERT_CHALLENGE_LENGTH+2;
912 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B)
922 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_C;
925 if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C)
927 p=(unsigned char *)s->init_buf->data;
928 i=ssl2_read(s,(char *)&(p[s->init_num]),6-s->init_num); /* try to read 6 octets ... */
929 if (i < 3-s->init_num) /* ... but don't call ssl2_part_read now if we got at least 3
930 * (probably NO-CERTIFICATE-ERROR) */
932 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
937 if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR))
940 if (i != SSL2_PE_NO_CERTIFICATE)
942 /* not the error message we expected -- let ssl2_part_read handle it */
944 ret = ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE, 3);
949 s->msg_callback(0, s->version, 0, p, 3, s, s->msg_callback_arg); /* ERROR */
951 /* this is the one place where we can recover from an SSL 2.0 error */
953 if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)
955 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
956 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
962 if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6))
964 ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
965 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_SHORT_READ);
968 if (s->init_num != 6)
970 SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR);
974 /* ok we have a response */
975 /* certificate type, there is only one right now. */
977 if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
979 ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
980 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_RESPONSE_ARGUMENT);
983 n2s(p,i); s->s2->tmp.clen=i;
984 n2s(p,i); s->s2->tmp.rlen=i;
985 s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_D;
988 /* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */
989 p=(unsigned char *)s->init_buf->data;
990 len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen;
991 if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
993 SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG);
996 j = (int)len - s->init_num;
997 i = ssl2_read(s,(char *)&(p[s->init_num]),j);
1000 ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
1003 if (s->msg_callback)
1004 s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-CERTIFICATE */
1007 x509=(X509 *)d2i_X509(NULL,&p,(long)s->s2->tmp.clen);
1010 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_X509_LIB);
1014 if (((sk=sk_X509_new_null()) == NULL) || (!sk_X509_push(sk,x509)))
1016 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1020 i=ssl_verify_cert_chain(s,sk);
1022 if (i) /* we like the packet, now check the chksum */
1025 EVP_PKEY *pkey=NULL;
1027 EVP_MD_CTX_init(&ctx);
1028 EVP_VerifyInit_ex(&ctx,s->ctx->rsa_md5, NULL);
1029 EVP_VerifyUpdate(&ctx,s->s2->key_material,
1030 (unsigned int)s->s2->key_material_length);
1031 EVP_VerifyUpdate(&ctx,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
1033 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
1034 buf2=OPENSSL_malloc((unsigned int)i);
1037 SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1041 i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2);
1042 EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i);
1045 pkey=X509_get_pubkey(x509);
1046 if (pkey == NULL) goto end;
1047 i=EVP_VerifyFinal(&ctx,p,s->s2->tmp.rlen,pkey);
1048 EVP_PKEY_free(pkey);
1049 EVP_MD_CTX_cleanup(&ctx);
1053 if (s->session->peer != NULL)
1054 X509_free(s->session->peer);
1055 s->session->peer=x509;
1056 CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
1057 s->session->verify_result = s->verify_result;
1063 SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_CHECKSUM);
1070 ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
1078 static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
1079 unsigned char *to, int padding)
1084 if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL))
1086 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_NO_PRIVATEKEY);
1089 if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA)
1091 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
1094 rsa=c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa;
1096 /* we have the public key */
1097 i=RSA_private_decrypt(len,from,to,rsa,padding);
1099 SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,ERR_R_RSA_LIB);
1102 #else /* !OPENSSL_NO_SSL2 */
1105 static void *dummy=&dummy;