sl@0: /* ssl/s2_srvr.c */
sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * This package is an SSL implementation written
sl@0:  * by Eric Young (eay@cryptsoft.com).
sl@0:  * The implementation was written so as to conform with Netscapes SSL.
sl@0:  * 
sl@0:  * This library is free for commercial and non-commercial use as long as
sl@0:  * the following conditions are aheared to.  The following conditions
sl@0:  * apply to all code found in this distribution, be it the RC4, RSA,
sl@0:  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
sl@0:  * included with this distribution is covered by the same copyright terms
sl@0:  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
sl@0:  * 
sl@0:  * Copyright remains Eric Young's, and as such any Copyright notices in
sl@0:  * the code are not to be removed.
sl@0:  * If this package is used in a product, Eric Young should be given attribution
sl@0:  * as the author of the parts of the library used.
sl@0:  * This can be in the form of a textual message at program startup or
sl@0:  * in documentation (online or textual) provided with the package.
sl@0:  * 
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 3. All advertising materials mentioning features or use of this software
sl@0:  *    must display the following acknowledgement:
sl@0:  *    "This product includes cryptographic software written by
sl@0:  *     Eric Young (eay@cryptsoft.com)"
sl@0:  *    The word 'cryptographic' can be left out if the rouines from the library
sl@0:  *    being used are not cryptographic related :-).
sl@0:  * 4. If you include any Windows specific code (or a derivative thereof) from 
sl@0:  *    the apps directory (application code) you must include an acknowledgement:
sl@0:  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  * 
sl@0:  * The licence and distribution terms for any publically available version or
sl@0:  * derivative of this code cannot be changed.  i.e. this code cannot simply be
sl@0:  * copied and put under another distribution licence
sl@0:  * [including the GNU Public Licence.]
sl@0:  */
sl@0: /* ====================================================================
sl@0:  * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  *
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer. 
sl@0:  *
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in
sl@0:  *    the documentation and/or other materials provided with the
sl@0:  *    distribution.
sl@0:  *
sl@0:  * 3. All advertising materials mentioning features or use of this
sl@0:  *    software must display the following acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
sl@0:  *
sl@0:  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
sl@0:  *    endorse or promote products derived from this software without
sl@0:  *    prior written permission. For written permission, please contact
sl@0:  *    openssl-core@openssl.org.
sl@0:  *
sl@0:  * 5. Products derived from this software may not be called "OpenSSL"
sl@0:  *    nor may "OpenSSL" appear in their names without prior written
sl@0:  *    permission of the OpenSSL Project.
sl@0:  *
sl@0:  * 6. Redistributions of any form whatsoever must retain the following
sl@0:  *    acknowledgment:
sl@0:  *    "This product includes software developed by the OpenSSL Project
sl@0:  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
sl@0:  *
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
sl@0:  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
sl@0:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
sl@0:  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
sl@0:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
sl@0:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
sl@0:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
sl@0:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
sl@0:  * OF THE POSSIBILITY OF SUCH DAMAGE.
sl@0:  * ====================================================================
sl@0:  *
sl@0:  * This product includes cryptographic software written by Eric Young
sl@0:  * (eay@cryptsoft.com).  This product includes software written by Tim
sl@0:  * Hudson (tjh@cryptsoft.com).
sl@0:  *
sl@0:  */
sl@0: /*
sl@0:  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
sl@0:  */
sl@0:  
sl@0: #include "ssl_locl.h"
sl@0: #ifndef OPENSSL_NO_SSL2
sl@0: #include <stdio.h>
sl@0: #include <openssl/bio.h>
sl@0: #include <openssl/rand.h>
sl@0: #include <openssl/objects.h>
sl@0: #include <openssl/evp.h>
sl@0: 
sl@0: #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))
sl@0: #include "libssl_wsd.h"
sl@0: #endif
sl@0: 
sl@0: #ifdef EMULATOR
sl@0: 
sl@0: 	GET_STATIC_VAR_FROM_TLS(SSLv2_server_method_data,s2_srvr,SSL_METHOD)
sl@0: 	
sl@0: 	#define SSLv2_server_method_data (*GET_WSD_VAR_NAME(SSLv2_server_method_data,s2_srvr,s)())
sl@0: 	
sl@0: #endif
sl@0: static SSL_METHOD *ssl2_get_server_method(int ver);
sl@0: static int get_client_master_key(SSL *s);
sl@0: static int get_client_hello(SSL *s);
sl@0: static int server_hello(SSL *s); 
sl@0: static int get_client_finished(SSL *s);
sl@0: static int server_verify(SSL *s);
sl@0: static int server_finish(SSL *s);
sl@0: static int request_certificate(SSL *s);
sl@0: static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
sl@0: 	unsigned char *to,int padding);
sl@0: #define BREAK	break
sl@0: 
sl@0: static SSL_METHOD *ssl2_get_server_method(int ver)
sl@0: 	{
sl@0: 	if (ver == SSL2_VERSION)
sl@0: 		return(SSLv2_server_method());
sl@0: 	else
sl@0: 		return(NULL);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C IMPLEMENT_ssl2_meth_func(SSLv2_server_method,
sl@0: 			ssl2_accept,
sl@0: 			ssl_undefined_function,
sl@0: 			ssl2_get_server_method)
sl@0: 
sl@0: int ssl2_accept(SSL *s)
sl@0: 	{
sl@0: 	unsigned long l=(unsigned long)time(NULL);
sl@0: 	BUF_MEM *buf=NULL;
sl@0: 	int ret= -1;
sl@0: 	long num1;
sl@0: 	void (*cb)(const SSL *ssl,int type,int val)=NULL;
sl@0: 	int new_state,state;
sl@0: 
sl@0: 	RAND_add(&l,sizeof(l),0);
sl@0: 	ERR_clear_error();
sl@0: 	clear_sys_error();
sl@0: 
sl@0: 	if (s->info_callback != NULL)
sl@0: 		cb=s->info_callback;
sl@0: 	else if (s->ctx->info_callback != NULL)
sl@0: 		cb=s->ctx->info_callback;
sl@0: 
sl@0: 	/* init things to blank */
sl@0: 	s->in_handshake++;
sl@0: 	if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
sl@0: 
sl@0: 	if (s->cert == NULL)
sl@0: 		{
sl@0: 		SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
sl@0: 		return(-1);
sl@0: 		}
sl@0: 
sl@0: 	clear_sys_error();
sl@0: 	for (;;)
sl@0: 		{
sl@0: 		state=s->state;
sl@0: 
sl@0: 		switch (s->state)
sl@0: 			{
sl@0: 		case SSL_ST_BEFORE:
sl@0: 		case SSL_ST_ACCEPT:
sl@0: 		case SSL_ST_BEFORE|SSL_ST_ACCEPT:
sl@0: 		case SSL_ST_OK|SSL_ST_ACCEPT:
sl@0: 
sl@0: 			s->server=1;
sl@0: 			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
sl@0: 
sl@0: 			s->version=SSL2_VERSION;
sl@0: 			s->type=SSL_ST_ACCEPT;
sl@0: 
sl@0: 			buf=s->init_buf;
sl@0: 			if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
sl@0: 				{ ret= -1; goto end; }
sl@0: 			if (!BUF_MEM_grow(buf,(int)
sl@0: 				SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
sl@0: 				{ ret= -1; goto end; }
sl@0: 			s->init_buf=buf;
sl@0: 			s->init_num=0;
sl@0: 			s->ctx->stats.sess_accept++;
sl@0: 			s->handshake_func=ssl2_accept;
sl@0: 			s->state=SSL2_ST_GET_CLIENT_HELLO_A;
sl@0: 			BREAK;
sl@0: 
sl@0: 		case SSL2_ST_GET_CLIENT_HELLO_A:
sl@0: 		case SSL2_ST_GET_CLIENT_HELLO_B:
sl@0: 		case SSL2_ST_GET_CLIENT_HELLO_C:
sl@0: 			s->shutdown=0;
sl@0: 			ret=get_client_hello(s);
sl@0: 			if (ret <= 0) goto end;
sl@0: 			s->init_num=0;
sl@0: 			s->state=SSL2_ST_SEND_SERVER_HELLO_A;
sl@0: 			BREAK;
sl@0: 
sl@0: 		case SSL2_ST_SEND_SERVER_HELLO_A:
sl@0: 		case SSL2_ST_SEND_SERVER_HELLO_B:
sl@0: 			ret=server_hello(s);
sl@0: 			if (ret <= 0) goto end;
sl@0: 			s->init_num=0;
sl@0: 			if (!s->hit)
sl@0: 				{
sl@0: 				s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_A;
sl@0: 				BREAK;
sl@0: 				}
sl@0: 			else
sl@0: 				{
sl@0: 				s->state=SSL2_ST_SERVER_START_ENCRYPTION;
sl@0: 				BREAK;
sl@0: 				}
sl@0: 		case SSL2_ST_GET_CLIENT_MASTER_KEY_A:
sl@0: 		case SSL2_ST_GET_CLIENT_MASTER_KEY_B:
sl@0: 			ret=get_client_master_key(s);
sl@0: 			if (ret <= 0) goto end;
sl@0: 			s->init_num=0;
sl@0: 			s->state=SSL2_ST_SERVER_START_ENCRYPTION;
sl@0: 			BREAK;
sl@0: 
sl@0: 		case SSL2_ST_SERVER_START_ENCRYPTION:
sl@0: 			/* Ok we how have sent all the stuff needed to
sl@0: 			 * start encrypting, the next packet back will
sl@0: 			 * be encrypted. */
sl@0: 			if (!ssl2_enc_init(s,0))
sl@0: 				{ ret= -1; goto end; }
sl@0: 			s->s2->clear_text=0;
sl@0: 			s->state=SSL2_ST_SEND_SERVER_VERIFY_A;
sl@0: 			BREAK;
sl@0: 
sl@0: 		case SSL2_ST_SEND_SERVER_VERIFY_A:
sl@0: 		case SSL2_ST_SEND_SERVER_VERIFY_B:
sl@0: 			ret=server_verify(s);
sl@0: 			if (ret <= 0) goto end;
sl@0: 			s->init_num=0;
sl@0: 			if (s->hit)
sl@0: 				{
sl@0: 				/* If we are in here, we have been
sl@0: 				 * buffering the output, so we need to
sl@0: 				 * flush it and remove buffering from
sl@0: 				 * future traffic */
sl@0: 				s->state=SSL2_ST_SEND_SERVER_VERIFY_C;
sl@0: 				BREAK;
sl@0: 				}
sl@0: 			else
sl@0: 				{
sl@0: 				s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
sl@0: 				break;
sl@0: 				}
sl@0: 
sl@0:  		case SSL2_ST_SEND_SERVER_VERIFY_C:
sl@0:  			/* get the number of bytes to write */
sl@0:  			num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
sl@0:  			if (num1 != 0)
sl@0:  				{
sl@0: 				s->rwstate=SSL_WRITING;
sl@0:  				num1=BIO_flush(s->wbio);
sl@0:  				if (num1 <= 0) { ret= -1; goto end; }
sl@0: 				s->rwstate=SSL_NOTHING;
sl@0: 				}
sl@0: 
sl@0:  			/* flushed and now remove buffering */
sl@0:  			s->wbio=BIO_pop(s->wbio);
sl@0: 
sl@0:  			s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
sl@0:   			BREAK;
sl@0: 
sl@0: 		case SSL2_ST_GET_CLIENT_FINISHED_A:
sl@0: 		case SSL2_ST_GET_CLIENT_FINISHED_B:
sl@0: 			ret=get_client_finished(s);
sl@0: 			if (ret <= 0)
sl@0: 				goto end;
sl@0: 			s->init_num=0;
sl@0: 			s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_A;
sl@0: 			BREAK;
sl@0: 
sl@0: 		case SSL2_ST_SEND_REQUEST_CERTIFICATE_A:
sl@0: 		case SSL2_ST_SEND_REQUEST_CERTIFICATE_B:
sl@0: 		case SSL2_ST_SEND_REQUEST_CERTIFICATE_C:
sl@0: 		case SSL2_ST_SEND_REQUEST_CERTIFICATE_D:
sl@0: 			/* don't do a 'request certificate' if we
sl@0: 			 * don't want to, or we already have one, and
sl@0: 			 * we only want to do it once. */
sl@0: 			if (!(s->verify_mode & SSL_VERIFY_PEER) ||
sl@0: 				((s->session->peer != NULL) &&
sl@0: 				(s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
sl@0: 				{
sl@0: 				s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
sl@0: 				break;
sl@0: 				}
sl@0: 			else
sl@0: 				{
sl@0: 				ret=request_certificate(s);
sl@0: 				if (ret <= 0) goto end;
sl@0: 				s->init_num=0;
sl@0: 				s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
sl@0: 				}
sl@0: 			BREAK;
sl@0: 
sl@0: 		case SSL2_ST_SEND_SERVER_FINISHED_A:
sl@0: 		case SSL2_ST_SEND_SERVER_FINISHED_B:
sl@0: 			ret=server_finish(s);
sl@0: 			if (ret <= 0) goto end;
sl@0: 			s->init_num=0;
sl@0: 			s->state=SSL_ST_OK;
sl@0: 			break;
sl@0: 
sl@0: 		case SSL_ST_OK:
sl@0: 			BUF_MEM_free(s->init_buf);
sl@0: 			ssl_free_wbio_buffer(s);
sl@0: 			s->init_buf=NULL;
sl@0: 			s->init_num=0;
sl@0: 		/*	ERR_clear_error();*/
sl@0: 
sl@0: 			ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
sl@0: 
sl@0: 			s->ctx->stats.sess_accept_good++;
sl@0: 			/* s->server=1; */
sl@0: 			ret=1;
sl@0: 
sl@0: 			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
sl@0: 
sl@0: 			goto end;
sl@0: 			/* BREAK; */
sl@0: 
sl@0: 		default:
sl@0: 			SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_UNKNOWN_STATE);
sl@0: 			ret= -1;
sl@0: 			goto end;
sl@0: 			/* BREAK; */
sl@0: 			}
sl@0: 		
sl@0: 		if ((cb != NULL) && (s->state != state))
sl@0: 			{
sl@0: 			new_state=s->state;
sl@0: 			s->state=state;
sl@0: 			cb(s,SSL_CB_ACCEPT_LOOP,1);
sl@0: 			s->state=new_state;
sl@0: 			}
sl@0: 		}
sl@0: end:
sl@0: 	s->in_handshake--;
sl@0: 	if (cb != NULL)
sl@0: 		cb(s,SSL_CB_ACCEPT_EXIT,ret);
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: static int get_client_master_key(SSL *s)
sl@0: 	{
sl@0: 	int is_export,i,n,keya,ek;
sl@0: 	unsigned long len;
sl@0: 	unsigned char *p;
sl@0: 	SSL_CIPHER *cp;
sl@0: 	const EVP_CIPHER *c;
sl@0: 	const EVP_MD *md;
sl@0: 
sl@0: 	p=(unsigned char *)s->init_buf->data;
sl@0: 	if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A)
sl@0: 		{
sl@0: 		i=ssl2_read(s,(char *)&(p[s->init_num]),10-s->init_num);
sl@0: 
sl@0: 		if (i < (10-s->init_num))
sl@0: 			return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
sl@0: 		s->init_num = 10;
sl@0: 
sl@0: 		if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY)
sl@0: 			{
sl@0: 			if (p[-1] != SSL2_MT_ERROR)
sl@0: 				{
sl@0: 				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 				SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_READ_WRONG_PACKET_TYPE);
sl@0: 				}
sl@0: 			else
sl@0: 				SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_PEER_ERROR);
sl@0: 			return(-1);
sl@0: 			}
sl@0: 
sl@0: 		cp=ssl2_get_cipher_by_char(p);
sl@0: 		if (cp == NULL)
sl@0: 			{
sl@0: 			ssl2_return_error(s,SSL2_PE_NO_CIPHER);
sl@0: 			SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_CIPHER_MATCH);
sl@0: 			return(-1);
sl@0: 			}
sl@0: 		s->session->cipher= cp;
sl@0: 
sl@0: 		p+=3;
sl@0: 		n2s(p,i); s->s2->tmp.clear=i;
sl@0: 		n2s(p,i); s->s2->tmp.enc=i;
sl@0: 		n2s(p,i); s->session->key_arg_length=i;
sl@0: 		if(s->session->key_arg_length > SSL_MAX_KEY_ARG_LENGTH)
sl@0: 			{
sl@0: 			ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 			SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_KEY_ARG_TOO_LONG);
sl@0: 			return -1;
sl@0: 			}
sl@0: 		s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B;
sl@0: 		}
sl@0: 
sl@0: 	/* SSL2_ST_GET_CLIENT_MASTER_KEY_B */
sl@0: 	p=(unsigned char *)s->init_buf->data;
sl@0: 	if (s->init_buf->length < SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
sl@0: 		{
sl@0: 		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 		SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
sl@0: 		return -1;
sl@0: 		}
sl@0: 	keya=s->session->key_arg_length;
sl@0: 	len = 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc + (unsigned long)keya;
sl@0: 	if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
sl@0: 		{
sl@0: 		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 		SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG);
sl@0: 		return -1;
sl@0: 		}
sl@0: 	n = (int)len - s->init_num;
sl@0: 	i = ssl2_read(s,(char *)&(p[s->init_num]),n);
sl@0: 	if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
sl@0: 	if (s->msg_callback)
sl@0: 		s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-MASTER-KEY */
sl@0: 	p += 10;
sl@0: 
sl@0: 	memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]),
sl@0: 		(unsigned int)keya);
sl@0: 
sl@0: 	if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)
sl@0: 		{
sl@0: 		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 		SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY);
sl@0: 		return(-1);
sl@0: 		}
sl@0: 	i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc,
sl@0: 		&(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]),
sl@0: 		(s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
sl@0: 
sl@0: 	is_export=SSL_C_IS_EXPORT(s->session->cipher);
sl@0: 	
sl@0: 	if (!ssl_cipher_get_evp(s->session,&c,&md,NULL))
sl@0: 		{
sl@0: 		ssl2_return_error(s,SSL2_PE_NO_CIPHER);
sl@0: 		SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
sl@0: 		return(0);
sl@0: 		}
sl@0: 
sl@0: 	if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
sl@0: 		{
sl@0: 		is_export=1;
sl@0: 		ek=8;
sl@0: 		}
sl@0: 	else
sl@0: 		ek=5;
sl@0: 
sl@0: 	/* bad decrypt */
sl@0: #if 1
sl@0: 	/* If a bad decrypt, continue with protocol but with a
sl@0: 	 * random master secret (Bleichenbacher attack) */
sl@0: 	if ((i < 0) ||
sl@0: 		((!is_export && (i != EVP_CIPHER_key_length(c)))
sl@0: 		|| (is_export && ((i != ek) || (s->s2->tmp.clear+(unsigned int)i !=
sl@0: 			(unsigned int)EVP_CIPHER_key_length(c))))))
sl@0: 		{
sl@0: 		ERR_clear_error();
sl@0: 		if (is_export)
sl@0: 			i=ek;
sl@0: 		else
sl@0: 			i=EVP_CIPHER_key_length(c);
sl@0: 		if (RAND_pseudo_bytes(p,i) <= 0)
sl@0: 			return 0;
sl@0: 		}
sl@0: #else
sl@0: 	if (i < 0)
sl@0: 		{
sl@0: 		error=1;
sl@0: 		SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT);
sl@0: 		}
sl@0: 	/* incorrect number of key bytes for non export cipher */
sl@0: 	else if ((!is_export && (i != EVP_CIPHER_key_length(c)))
sl@0: 		|| (is_export && ((i != ek) || (s->s2->tmp.clear+i !=
sl@0: 			EVP_CIPHER_key_length(c)))))
sl@0: 		{
sl@0: 		error=1;
sl@0: 		SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS);
sl@0: 		}
sl@0: 	if (error)
sl@0: 		{
sl@0: 		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 		return(-1);
sl@0: 		}
sl@0: #endif
sl@0: 
sl@0: 	if (is_export) i+=s->s2->tmp.clear;
sl@0: 
sl@0: 	if (i > SSL_MAX_MASTER_KEY_LENGTH)
sl@0: 		{
sl@0: 		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 		SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
sl@0: 		return -1;
sl@0: 		}
sl@0: 	s->session->master_key_length=i;
sl@0: 	memcpy(s->session->master_key,p,(unsigned int)i);
sl@0: 	return(1);
sl@0: 	}
sl@0: 
sl@0: static int get_client_hello(SSL *s)
sl@0: 	{
sl@0: 	int i,n;
sl@0: 	unsigned long len;
sl@0: 	unsigned char *p;
sl@0: 	STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */
sl@0: 	STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */
sl@0: 	STACK_OF(SSL_CIPHER) *prio, *allow;
sl@0: 	int z;
sl@0: 
sl@0: 	/* This is a bit of a hack to check for the correct packet
sl@0: 	 * type the first time round. */
sl@0: 	if (s->state == SSL2_ST_GET_CLIENT_HELLO_A)
sl@0: 		{
sl@0: 		s->first_packet=1;
sl@0: 		s->state=SSL2_ST_GET_CLIENT_HELLO_B;
sl@0: 		}
sl@0: 
sl@0: 	p=(unsigned char *)s->init_buf->data;
sl@0: 	if (s->state == SSL2_ST_GET_CLIENT_HELLO_B)
sl@0: 		{
sl@0: 		i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num);
sl@0: 		if (i < (9-s->init_num)) 
sl@0: 			return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
sl@0: 		s->init_num = 9;
sl@0: 	
sl@0: 		if (*(p++) != SSL2_MT_CLIENT_HELLO)
sl@0: 			{
sl@0: 			if (p[-1] != SSL2_MT_ERROR)
sl@0: 				{
sl@0: 				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 				SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE);
sl@0: 				}
sl@0: 			else
sl@0: 				SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR);
sl@0: 			return(-1);
sl@0: 			}
sl@0: 		n2s(p,i);
sl@0: 		if (i < s->version) s->version=i;
sl@0: 		n2s(p,i); s->s2->tmp.cipher_spec_length=i;
sl@0: 		n2s(p,i); s->s2->tmp.session_id_length=i;
sl@0: 		n2s(p,i); s->s2->challenge_length=i;
sl@0: 		if (	(i < SSL2_MIN_CHALLENGE_LENGTH) ||
sl@0: 			(i > SSL2_MAX_CHALLENGE_LENGTH))
sl@0: 			{
sl@0: 			ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 			SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH);
sl@0: 			return(-1);
sl@0: 			}
sl@0: 		s->state=SSL2_ST_GET_CLIENT_HELLO_C;
sl@0: 		}
sl@0: 
sl@0: 	/* SSL2_ST_GET_CLIENT_HELLO_C */
sl@0: 	p=(unsigned char *)s->init_buf->data;
sl@0: 	len = 9 + (unsigned long)s->s2->tmp.cipher_spec_length + (unsigned long)s->s2->challenge_length + (unsigned long)s->s2->tmp.session_id_length;
sl@0: 	if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
sl@0: 		{
sl@0: 		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 		SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_MESSAGE_TOO_LONG);
sl@0: 		return -1;
sl@0: 		}
sl@0: 	n = (int)len - s->init_num;
sl@0: 	i = ssl2_read(s,(char *)&(p[s->init_num]),n);
sl@0: 	if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
sl@0: 	if (s->msg_callback)
sl@0: 		s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-HELLO */
sl@0: 	p += 9;
sl@0: 
sl@0: 	/* get session-id before cipher stuff so we can get out session
sl@0: 	 * structure if it is cached */
sl@0: 	/* session-id */
sl@0: 	if ((s->s2->tmp.session_id_length != 0) && 
sl@0: 		(s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH))
sl@0: 		{
sl@0: 		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 		SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH);
sl@0: 		return(-1);
sl@0: 		}
sl@0: 
sl@0: 	if (s->s2->tmp.session_id_length == 0)
sl@0: 		{
sl@0: 		if (!ssl_get_new_session(s,1))
sl@0: 			{
sl@0: 			ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 			return(-1);
sl@0: 			}
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]),
sl@0: 			s->s2->tmp.session_id_length, NULL);
sl@0: 		if (i == 1)
sl@0: 			{ /* previous session */
sl@0: 			s->hit=1;
sl@0: 			}
sl@0: 		else if (i == -1)
sl@0: 			{
sl@0: 			ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 			return(-1);
sl@0: 			}
sl@0: 		else
sl@0: 			{
sl@0: 			if (s->cert == NULL)
sl@0: 				{
sl@0: 				ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
sl@0: 				SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET);
sl@0: 				return(-1);
sl@0: 				}
sl@0: 
sl@0: 			if (!ssl_get_new_session(s,1))
sl@0: 				{
sl@0: 				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 				return(-1);
sl@0: 				}
sl@0: 			}
sl@0: 		}
sl@0: 
sl@0: 	if (!s->hit)
sl@0: 		{
sl@0: 		cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length,
sl@0: 			&s->session->ciphers);
sl@0: 		if (cs == NULL) goto mem_err;
sl@0: 
sl@0: 		cl=SSL_get_ciphers(s);
sl@0: 
sl@0: 		if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
sl@0: 		    {
sl@0: 		    prio=sk_SSL_CIPHER_dup(cl);
sl@0: 		    if (prio == NULL) goto mem_err;
sl@0: 		    allow = cs;
sl@0: 		    }
sl@0: 		else
sl@0: 		    {
sl@0: 		    prio = cs;
sl@0: 		    allow = cl;
sl@0: 		    }
sl@0: 		for (z=0; z<sk_SSL_CIPHER_num(prio); z++)
sl@0: 			{
sl@0: 			if (sk_SSL_CIPHER_find(allow,sk_SSL_CIPHER_value(prio,z)) < 0)
sl@0: 				{
sl@0: 				(void)sk_SSL_CIPHER_delete(prio,z);
sl@0: 				z--;
sl@0: 				}
sl@0: 			}
sl@0: 		if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
sl@0: 		    {
sl@0: 		    sk_SSL_CIPHER_free(s->session->ciphers);
sl@0: 		    s->session->ciphers = prio;
sl@0: 		    }
sl@0: 		/* s->session->ciphers should now have a list of
sl@0: 		 * ciphers that are on both the client and server.
sl@0: 		 * This list is ordered by the order the client sent
sl@0: 		 * the ciphers or in the order of the server's preference
sl@0: 		 * if SSL_OP_CIPHER_SERVER_PREFERENCE was set.
sl@0: 		 */
sl@0: 		}
sl@0: 	p+=s->s2->tmp.cipher_spec_length;
sl@0: 	/* done cipher selection */
sl@0: 
sl@0: 	/* session id extracted already */
sl@0: 	p+=s->s2->tmp.session_id_length;
sl@0: 
sl@0: 	/* challenge */
sl@0: 	if (s->s2->challenge_length > sizeof s->s2->challenge)
sl@0: 		{
sl@0: 		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 		SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
sl@0: 		return -1;
sl@0: 		}
sl@0: 	memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length);
sl@0: 	return(1);
sl@0: mem_err:
sl@0: 	SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
sl@0: 	return(0);
sl@0: 	}
sl@0: 
sl@0: static int server_hello(SSL *s)
sl@0: 	{
sl@0: 	unsigned char *p,*d;
sl@0: 	int n,hit;
sl@0: 	STACK_OF(SSL_CIPHER) *sk;
sl@0: 
sl@0: 	p=(unsigned char *)s->init_buf->data;
sl@0: 	if (s->state == SSL2_ST_SEND_SERVER_HELLO_A)
sl@0: 		{
sl@0: 		d=p+11;
sl@0: 		*(p++)=SSL2_MT_SERVER_HELLO;		/* type */
sl@0: 		hit=s->hit;
sl@0: 		*(p++)=(unsigned char)hit;
sl@0: #if 1
sl@0: 		if (!hit)
sl@0: 			{
sl@0: 			if (s->session->sess_cert != NULL)
sl@0: 				/* This can't really happen because get_client_hello
sl@0: 				 * has called ssl_get_new_session, which does not set
sl@0: 				 * sess_cert. */
sl@0: 				ssl_sess_cert_free(s->session->sess_cert);
sl@0: 			s->session->sess_cert = ssl_sess_cert_new();
sl@0: 			if (s->session->sess_cert == NULL)
sl@0: 				{
sl@0: 				SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE);
sl@0: 				return(-1);
sl@0: 				}
sl@0: 			}
sl@0: 		/* If 'hit' is set, then s->sess_cert may be non-NULL or NULL,
sl@0: 		 * depending on whether it survived in the internal cache
sl@0: 		 * or was retrieved from an external cache.
sl@0: 		 * If it is NULL, we cannot put any useful data in it anyway,
sl@0: 		 * so we don't touch it.
sl@0: 		 */
sl@0: 
sl@0: #else /* That's what used to be done when cert_st and sess_cert_st were
sl@0: 	   * the same. */
sl@0: 		if (!hit)
sl@0: 			{			/* else add cert to session */
sl@0: 			CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
sl@0: 			if (s->session->sess_cert != NULL)
sl@0: 				ssl_cert_free(s->session->sess_cert);
sl@0: 			s->session->sess_cert=s->cert;		
sl@0: 			}
sl@0: 		else	/* We have a session id-cache hit, if the
sl@0: 			 * session-id has no certificate listed against
sl@0: 			 * the 'cert' structure, grab the 'old' one
sl@0: 			 * listed against the SSL connection */
sl@0: 			{
sl@0: 			if (s->session->sess_cert == NULL)
sl@0: 				{
sl@0: 				CRYPTO_add(&s->cert->references,1,
sl@0: 					CRYPTO_LOCK_SSL_CERT);
sl@0: 				s->session->sess_cert=s->cert;
sl@0: 				}
sl@0: 			}
sl@0: #endif
sl@0: 
sl@0: 		if (s->cert == NULL)
sl@0: 			{
sl@0: 			ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
sl@0: 			SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED);
sl@0: 			return(-1);
sl@0: 			}
sl@0: 
sl@0: 		if (hit)
sl@0: 			{
sl@0: 			*(p++)=0;		/* no certificate type */
sl@0: 			s2n(s->version,p);	/* version */
sl@0: 			s2n(0,p);		/* cert len */
sl@0: 			s2n(0,p);		/* ciphers len */
sl@0: 			}
sl@0: 		else
sl@0: 			{
sl@0: 			/* EAY EAY */
sl@0: 			/* put certificate type */
sl@0: 			*(p++)=SSL2_CT_X509_CERTIFICATE;
sl@0: 			s2n(s->version,p);	/* version */
sl@0: 			n=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
sl@0: 			s2n(n,p);		/* certificate length */
sl@0: 			i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&d);
sl@0: 			n=0;
sl@0: 			
sl@0: 			/* lets send out the ciphers we like in the
sl@0: 			 * prefered order */
sl@0: 			sk= s->session->ciphers;
sl@0: 			n=ssl_cipher_list_to_bytes(s,s->session->ciphers,d,0);
sl@0: 			d+=n;
sl@0: 			s2n(n,p);		/* add cipher length */
sl@0: 			}
sl@0: 
sl@0: 		/* make and send conn_id */
sl@0: 		s2n(SSL2_CONNECTION_ID_LENGTH,p);	/* add conn_id length */
sl@0: 		s->s2->conn_id_length=SSL2_CONNECTION_ID_LENGTH;
sl@0: 		if (RAND_pseudo_bytes(s->s2->conn_id,(int)s->s2->conn_id_length) <= 0)
sl@0: 			return -1;
sl@0: 		memcpy(d,s->s2->conn_id,SSL2_CONNECTION_ID_LENGTH);
sl@0: 		d+=SSL2_CONNECTION_ID_LENGTH;
sl@0: 
sl@0: 		s->state=SSL2_ST_SEND_SERVER_HELLO_B;
sl@0: 		s->init_num=d-(unsigned char *)s->init_buf->data;
sl@0: 		s->init_off=0;
sl@0: 		}
sl@0: 	/* SSL2_ST_SEND_SERVER_HELLO_B */
sl@0:  	/* If we are using TCP/IP, the performance is bad if we do 2
sl@0:  	 * writes without a read between them.  This occurs when
sl@0:  	 * Session-id reuse is used, so I will put in a buffering module
sl@0:  	 */
sl@0:  	if (s->hit)
sl@0:  		{
sl@0: 		if (!ssl_init_wbio_buffer(s,1)) return(-1);
sl@0:  		}
sl@0:  
sl@0: 	return(ssl2_do_write(s));
sl@0: 	}
sl@0: 
sl@0: static int get_client_finished(SSL *s)
sl@0: 	{
sl@0: 	unsigned char *p;
sl@0: 	int i, n;
sl@0: 	unsigned long len;
sl@0: 
sl@0: 	p=(unsigned char *)s->init_buf->data;
sl@0: 	if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A)
sl@0: 		{
sl@0: 		i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
sl@0: 		if (i < 1-s->init_num)
sl@0: 			return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
sl@0: 		s->init_num += i;
sl@0: 
sl@0: 		if (*p != SSL2_MT_CLIENT_FINISHED)
sl@0: 			{
sl@0: 			if (*p != SSL2_MT_ERROR)
sl@0: 				{
sl@0: 				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 				SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
sl@0: 				}
sl@0: 			else
sl@0: 				{
sl@0: 				SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_PEER_ERROR);
sl@0: 				/* try to read the error message */
sl@0: 				i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
sl@0: 				return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
sl@0: 				}
sl@0: 			return(-1);
sl@0: 			}
sl@0: 		s->state=SSL2_ST_GET_CLIENT_FINISHED_B;
sl@0: 		}
sl@0: 
sl@0: 	/* SSL2_ST_GET_CLIENT_FINISHED_B */
sl@0: 	if (s->s2->conn_id_length > sizeof s->s2->conn_id)
sl@0: 		{
sl@0: 		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 		SSLerr(SSL_F_GET_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
sl@0: 		return -1;
sl@0: 		}
sl@0: 	len = 1 + (unsigned long)s->s2->conn_id_length;
sl@0: 	n = (int)len - s->init_num;
sl@0: 	i = ssl2_read(s,(char *)&(p[s->init_num]),n);
sl@0: 	if (i < n)
sl@0: 		{
sl@0: 		return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
sl@0: 		}
sl@0: 	if (s->msg_callback)
sl@0: 		s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-FINISHED */
sl@0: 	p += 1;
sl@0: 	if (memcmp(p,s->s2->conn_id,s->s2->conn_id_length) != 0)
sl@0: 		{
sl@0: 		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 		SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_CONNECTION_ID_IS_DIFFERENT);
sl@0: 		return(-1);
sl@0: 		}
sl@0: 	return(1);
sl@0: 	}
sl@0: 
sl@0: static int server_verify(SSL *s)
sl@0: 	{
sl@0: 	unsigned char *p;
sl@0: 
sl@0: 	if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A)
sl@0: 		{
sl@0: 		p=(unsigned char *)s->init_buf->data;
sl@0: 		*(p++)=SSL2_MT_SERVER_VERIFY;
sl@0: 		if (s->s2->challenge_length > sizeof s->s2->challenge)
sl@0: 			{
sl@0: 			SSLerr(SSL_F_SERVER_VERIFY, ERR_R_INTERNAL_ERROR);
sl@0: 			return -1;
sl@0: 			}
sl@0: 		memcpy(p,s->s2->challenge,(unsigned int)s->s2->challenge_length);
sl@0: 		/* p+=s->s2->challenge_length; */
sl@0: 
sl@0: 		s->state=SSL2_ST_SEND_SERVER_VERIFY_B;
sl@0: 		s->init_num=s->s2->challenge_length+1;
sl@0: 		s->init_off=0;
sl@0: 		}
sl@0: 	return(ssl2_do_write(s));
sl@0: 	}
sl@0: 
sl@0: static int server_finish(SSL *s)
sl@0: 	{
sl@0: 	unsigned char *p;
sl@0: 
sl@0: 	if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A)
sl@0: 		{
sl@0: 		p=(unsigned char *)s->init_buf->data;
sl@0: 		*(p++)=SSL2_MT_SERVER_FINISHED;
sl@0: 
sl@0: 		if (s->session->session_id_length > sizeof s->session->session_id)
sl@0: 			{
sl@0: 			SSLerr(SSL_F_SERVER_FINISH, ERR_R_INTERNAL_ERROR);
sl@0: 			return -1;
sl@0: 			}
sl@0: 		memcpy(p,s->session->session_id, (unsigned int)s->session->session_id_length);
sl@0: 		/* p+=s->session->session_id_length; */
sl@0: 
sl@0: 		s->state=SSL2_ST_SEND_SERVER_FINISHED_B;
sl@0: 		s->init_num=s->session->session_id_length+1;
sl@0: 		s->init_off=0;
sl@0: 		}
sl@0: 
sl@0: 	/* SSL2_ST_SEND_SERVER_FINISHED_B */
sl@0: 	return(ssl2_do_write(s));
sl@0: 	}
sl@0: 
sl@0: /* send the request and check the response */
sl@0: static int request_certificate(SSL *s)
sl@0: 	{
sl@0: 	const unsigned char *cp;
sl@0: 	unsigned char *p,*p2,*buf2;
sl@0: 	unsigned char *ccd;
sl@0: 	int i,j,ctype,ret= -1;
sl@0: 	unsigned long len;
sl@0: 	X509 *x509=NULL;
sl@0: 	STACK_OF(X509) *sk=NULL;
sl@0: 
sl@0: 	ccd=s->s2->tmp.ccl;
sl@0: 	if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A)
sl@0: 		{
sl@0: 		p=(unsigned char *)s->init_buf->data;
sl@0: 		*(p++)=SSL2_MT_REQUEST_CERTIFICATE;
sl@0: 		*(p++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION;
sl@0: 		if (RAND_pseudo_bytes(ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH) <= 0)
sl@0: 			return -1;
sl@0: 		memcpy(p,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
sl@0: 
sl@0: 		s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_B;
sl@0: 		s->init_num=SSL2_MIN_CERT_CHALLENGE_LENGTH+2;
sl@0: 		s->init_off=0;
sl@0: 		}
sl@0: 
sl@0: 	if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B)
sl@0: 		{
sl@0: 		i=ssl2_do_write(s);
sl@0: 		if (i <= 0)
sl@0: 			{
sl@0: 			ret=i;
sl@0: 			goto end;
sl@0: 			}
sl@0: 
sl@0: 		s->init_num=0;
sl@0: 		s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_C;
sl@0: 		}
sl@0: 
sl@0: 	if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C)
sl@0: 		{
sl@0: 		p=(unsigned char *)s->init_buf->data;
sl@0: 		i=ssl2_read(s,(char *)&(p[s->init_num]),6-s->init_num); /* try to read 6 octets ... */
sl@0: 		if (i < 3-s->init_num) /* ... but don't call ssl2_part_read now if we got at least 3
sl@0: 		                        * (probably NO-CERTIFICATE-ERROR) */
sl@0: 			{
sl@0: 			ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
sl@0: 			goto end;
sl@0: 			}
sl@0: 		s->init_num += i;
sl@0: 
sl@0: 		if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR))
sl@0: 			{
sl@0: 			n2s(p,i);
sl@0: 			if (i != SSL2_PE_NO_CERTIFICATE)
sl@0: 				{
sl@0: 				/* not the error message we expected -- let ssl2_part_read handle it */
sl@0: 				s->init_num -= 3;
sl@0: 				ret = ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE, 3);
sl@0: 				goto end;
sl@0: 				}
sl@0: 
sl@0: 			if (s->msg_callback)
sl@0: 				s->msg_callback(0, s->version, 0, p, 3, s, s->msg_callback_arg); /* ERROR */
sl@0: 
sl@0: 			/* this is the one place where we can recover from an SSL 2.0 error */
sl@0: 
sl@0: 			if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)
sl@0: 				{
sl@0: 				ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
sl@0: 				SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
sl@0: 				goto end;
sl@0: 				}
sl@0: 			ret=1;
sl@0: 			goto end;
sl@0: 			}
sl@0: 		if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6))
sl@0: 			{
sl@0: 			ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
sl@0: 			SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_SHORT_READ);
sl@0: 			goto end;
sl@0: 			}
sl@0: 		if (s->init_num != 6)
sl@0: 			{
sl@0: 			SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR);
sl@0: 			goto end;
sl@0: 			}
sl@0: 		
sl@0: 		/* ok we have a response */
sl@0: 		/* certificate type, there is only one right now. */
sl@0: 		ctype= *(p++);
sl@0: 		if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
sl@0: 			{
sl@0: 			ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
sl@0: 			SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_RESPONSE_ARGUMENT);
sl@0: 			goto end;
sl@0: 			}
sl@0: 		n2s(p,i); s->s2->tmp.clen=i;
sl@0: 		n2s(p,i); s->s2->tmp.rlen=i;
sl@0: 		s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_D;
sl@0: 		}
sl@0: 
sl@0: 	/* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */
sl@0: 	p=(unsigned char *)s->init_buf->data;
sl@0: 	len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen;
sl@0: 	if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
sl@0: 		{
sl@0: 		SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_MESSAGE_TOO_LONG);
sl@0: 		goto end;
sl@0: 		}
sl@0: 	j = (int)len - s->init_num;
sl@0: 	i = ssl2_read(s,(char *)&(p[s->init_num]),j);
sl@0: 	if (i < j) 
sl@0: 		{
sl@0: 		ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
sl@0: 		goto end;
sl@0: 		}
sl@0: 	if (s->msg_callback)
sl@0: 		s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-CERTIFICATE */
sl@0: 	p += 6;
sl@0: 
sl@0: 	cp = p;
sl@0: 	x509=(X509 *)d2i_X509(NULL,&cp,(long)s->s2->tmp.clen);
sl@0: 	if (x509 == NULL)
sl@0: 		{
sl@0: 		SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_X509_LIB);
sl@0: 		goto msg_end;
sl@0: 		}
sl@0: 
sl@0: 	if (((sk=sk_X509_new_null()) == NULL) || (!sk_X509_push(sk,x509)))
sl@0: 		{
sl@0: 		SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
sl@0: 		goto msg_end;
sl@0: 		}
sl@0: 
sl@0: 	i=ssl_verify_cert_chain(s,sk);
sl@0: 
sl@0: 	if (i)	/* we like the packet, now check the chksum */
sl@0: 		{
sl@0: 		EVP_MD_CTX ctx;
sl@0: 		EVP_PKEY *pkey=NULL;
sl@0: 
sl@0: 		EVP_MD_CTX_init(&ctx);
sl@0: 		EVP_VerifyInit_ex(&ctx,s->ctx->rsa_md5, NULL);
sl@0: 		EVP_VerifyUpdate(&ctx,s->s2->key_material,
sl@0: 				 s->s2->key_material_length);
sl@0: 		EVP_VerifyUpdate(&ctx,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
sl@0: 
sl@0: 		i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
sl@0: 		buf2=OPENSSL_malloc((unsigned int)i);
sl@0: 		if (buf2 == NULL)
sl@0: 			{
sl@0: 			SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
sl@0: 			goto msg_end;
sl@0: 			}
sl@0: 		p2=buf2;
sl@0: 		i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2);
sl@0: 		EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i);
sl@0: 		OPENSSL_free(buf2);
sl@0: 
sl@0: 		pkey=X509_get_pubkey(x509);
sl@0: 		if (pkey == NULL) goto end;
sl@0: 		i=EVP_VerifyFinal(&ctx,cp,s->s2->tmp.rlen,pkey);
sl@0: 		EVP_PKEY_free(pkey);
sl@0: 		EVP_MD_CTX_cleanup(&ctx);
sl@0: 
sl@0: 		if (i) 
sl@0: 			{
sl@0: 			if (s->session->peer != NULL)
sl@0: 				X509_free(s->session->peer);
sl@0: 			s->session->peer=x509;
sl@0: 			CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
sl@0: 			s->session->verify_result = s->verify_result;
sl@0: 			ret=1;
sl@0: 			goto end;
sl@0: 			}
sl@0: 		else
sl@0: 			{
sl@0: 			SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_CHECKSUM);
sl@0: 			goto msg_end;
sl@0: 			}
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: msg_end:
sl@0: 		ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
sl@0: 		}
sl@0: end:
sl@0: 	sk_X509_free(sk);
sl@0: 	X509_free(x509);
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
sl@0: 	     unsigned char *to, int padding)
sl@0: 	{
sl@0: 	RSA *rsa;
sl@0: 	int i;
sl@0: 
sl@0: 	if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL))
sl@0: 		{
sl@0: 		SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_NO_PRIVATEKEY);
sl@0: 		return(-1);
sl@0: 		}
sl@0: 	if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA)
sl@0: 		{
sl@0: 		SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
sl@0: 		return(-1);
sl@0: 		}
sl@0: 	rsa=c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa;
sl@0: 
sl@0: 	/* we have the public key */
sl@0: 	i=RSA_private_decrypt(len,from,to,rsa,padding);
sl@0: 	if (i < 0)
sl@0: 		SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,ERR_R_RSA_LIB);
sl@0: 	return(i);
sl@0: 	}
sl@0: #else /* !OPENSSL_NO_SSL2 */
sl@0: 
sl@0: # if PEDANTIC
sl@0: static void *dummy=&dummy;
sl@0: # endif
sl@0: 
sl@0: #endif