Delete bundled copy of OpenSSL and replace with README.

openssl/ssl/s2_srvr.c

Index: openssl/ssl/s2_srvr.c
diff --git a/openssl/ssl/s2_srvr.c b/openssl/ssl/s2_srvr.c
deleted file mode 100644
index 3b14faa3630497440a95e13ea7605faad3773ba6..0000000000000000000000000000000000000000
--- a/openssl/ssl/s2_srvr.c
+++ /dev/null
@@ -1,1148 +0,0 @@
-/* ssl/s2_srvr.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- * 
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to.  The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- * 
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *    "This product includes cryptographic software written by
- *     Eric Young (eay@cryptsoft.com)"
- *    The word 'cryptographic' can be left out if the rouines from the library
- *    being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from 
- *    the apps directory (application code) you must include an acknowledgement:
- *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- * 
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * 
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed.  i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
- */
-/* ====================================================================
- * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer. 
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- *    software must display the following acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- *    endorse or promote products derived from this software without
- *    prior written permission. For written permission, please contact
- *    openssl-core@openssl.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- *    nor may "OpenSSL" appear in their names without prior written
- *    permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- *    acknowledgment:
- *    "This product includes software developed by the OpenSSL Project
- *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com).  This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
-
-#include "ssl_locl.h"
-#ifndef OPENSSL_NO_SSL2
-#include <stdio.h>
-#include <openssl/bio.h>
-#include <openssl/rand.h>
-#include <openssl/objects.h>
-#include <openssl/evp.h>
-
-static const SSL_METHOD *ssl2_get_server_method(int ver);
-static int get_client_master_key(SSL *s);
-static int get_client_hello(SSL *s);
-static int server_hello(SSL *s); 
-static int get_client_finished(SSL *s);
-static int server_verify(SSL *s);
-static int server_finish(SSL *s);
-static int request_certificate(SSL *s);
-static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
-	unsigned char *to,int padding);
-#define BREAK	break
-
-static const SSL_METHOD *ssl2_get_server_method(int ver)
-	{
-	if (ver == SSL2_VERSION)
-		return(SSLv2_server_method());
-	else
-		return(NULL);
-	}
-
-IMPLEMENT_ssl2_meth_func(SSLv2_server_method,
-			ssl2_accept,
-			ssl_undefined_function,
-			ssl2_get_server_method)
-
-int ssl2_accept(SSL *s)
-	{
-	unsigned long l=(unsigned long)time(NULL);
-	BUF_MEM *buf=NULL;
-	int ret= -1;
-	long num1;
-	void (*cb)(const SSL *ssl,int type,int val)=NULL;
-	int new_state,state;
-
-	RAND_add(&l,sizeof(l),0);
-	ERR_clear_error();
-	clear_sys_error();
-
-	if (s->info_callback != NULL)
-		cb=s->info_callback;
-	else if (s->ctx->info_callback != NULL)
-		cb=s->ctx->info_callback;
-
-	/* init things to blank */
-	s->in_handshake++;
-	if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
-
-	if (s->cert == NULL)
-		{
-		SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_NO_CERTIFICATE_SET);
-		return(-1);
-		}
-
-	clear_sys_error();
-	for (;;)
-		{
-		state=s->state;
-
-		switch (s->state)
-			{
-		case SSL_ST_BEFORE:
-		case SSL_ST_ACCEPT:
-		case SSL_ST_BEFORE|SSL_ST_ACCEPT:
-		case SSL_ST_OK|SSL_ST_ACCEPT:
-
-			s->server=1;
-			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
-
-			s->version=SSL2_VERSION;
-			s->type=SSL_ST_ACCEPT;
-
-			buf=s->init_buf;
-			if ((buf == NULL) && ((buf=BUF_MEM_new()) == NULL))
-				{ ret= -1; goto end; }
-			if (!BUF_MEM_grow(buf,(int)
-				SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
-				{ ret= -1; goto end; }
-			s->init_buf=buf;
-			s->init_num=0;
-			s->ctx->stats.sess_accept++;
-			s->handshake_func=ssl2_accept;
-			s->state=SSL2_ST_GET_CLIENT_HELLO_A;
-			BREAK;
-
-		case SSL2_ST_GET_CLIENT_HELLO_A:
-		case SSL2_ST_GET_CLIENT_HELLO_B:
-		case SSL2_ST_GET_CLIENT_HELLO_C:
-			s->shutdown=0;
-			ret=get_client_hello(s);
-			if (ret <= 0) goto end;
-			s->init_num=0;
-			s->state=SSL2_ST_SEND_SERVER_HELLO_A;
-			BREAK;
-
-		case SSL2_ST_SEND_SERVER_HELLO_A:
-		case SSL2_ST_SEND_SERVER_HELLO_B:
-			ret=server_hello(s);
-			if (ret <= 0) goto end;
-			s->init_num=0;
-			if (!s->hit)
-				{
-				s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_A;
-				BREAK;
-				}
-			else
-				{
-				s->state=SSL2_ST_SERVER_START_ENCRYPTION;
-				BREAK;
-				}
-		case SSL2_ST_GET_CLIENT_MASTER_KEY_A:
-		case SSL2_ST_GET_CLIENT_MASTER_KEY_B:
-			ret=get_client_master_key(s);
-			if (ret <= 0) goto end;
-			s->init_num=0;
-			s->state=SSL2_ST_SERVER_START_ENCRYPTION;
-			BREAK;
-
-		case SSL2_ST_SERVER_START_ENCRYPTION:
-			/* Ok we how have sent all the stuff needed to
-			 * start encrypting, the next packet back will
-			 * be encrypted. */
-			if (!ssl2_enc_init(s,0))
-				{ ret= -1; goto end; }
-			s->s2->clear_text=0;
-			s->state=SSL2_ST_SEND_SERVER_VERIFY_A;
-			BREAK;
-
-		case SSL2_ST_SEND_SERVER_VERIFY_A:
-		case SSL2_ST_SEND_SERVER_VERIFY_B:
-			ret=server_verify(s);
-			if (ret <= 0) goto end;
-			s->init_num=0;
-			if (s->hit)
-				{
-				/* If we are in here, we have been
-				 * buffering the output, so we need to
-				 * flush it and remove buffering from
-				 * future traffic */
-				s->state=SSL2_ST_SEND_SERVER_VERIFY_C;
-				BREAK;
-				}
-			else
-				{
-				s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
-				break;
-				}
-
- 		case SSL2_ST_SEND_SERVER_VERIFY_C:
- 			/* get the number of bytes to write */
- 			num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL);
- 			if (num1 > 0)
- 				{
-				s->rwstate=SSL_WRITING;
- 				num1=BIO_flush(s->wbio);
- 				if (num1 <= 0) { ret= -1; goto end; }
-				s->rwstate=SSL_NOTHING;
-				}
-
- 			/* flushed and now remove buffering */
- 			s->wbio=BIO_pop(s->wbio);
-
- 			s->state=SSL2_ST_GET_CLIENT_FINISHED_A;
-  			BREAK;
-
-		case SSL2_ST_GET_CLIENT_FINISHED_A:
-		case SSL2_ST_GET_CLIENT_FINISHED_B:
-			ret=get_client_finished(s);
-			if (ret <= 0)
-				goto end;
-			s->init_num=0;
-			s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_A;
-			BREAK;
-
-		case SSL2_ST_SEND_REQUEST_CERTIFICATE_A:
-		case SSL2_ST_SEND_REQUEST_CERTIFICATE_B:
-		case SSL2_ST_SEND_REQUEST_CERTIFICATE_C:
-		case SSL2_ST_SEND_REQUEST_CERTIFICATE_D:
-			/* don't do a 'request certificate' if we
-			 * don't want to, or we already have one, and
-			 * we only want to do it once. */
-			if (!(s->verify_mode & SSL_VERIFY_PEER) ||
-				((s->session->peer != NULL) &&
-				(s->verify_mode & SSL_VERIFY_CLIENT_ONCE)))
-				{
-				s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
-				break;
-				}
-			else
-				{
-				ret=request_certificate(s);
-				if (ret <= 0) goto end;
-				s->init_num=0;
-				s->state=SSL2_ST_SEND_SERVER_FINISHED_A;
-				}
-			BREAK;
-
-		case SSL2_ST_SEND_SERVER_FINISHED_A:
-		case SSL2_ST_SEND_SERVER_FINISHED_B:
-			ret=server_finish(s);
-			if (ret <= 0) goto end;
-			s->init_num=0;
-			s->state=SSL_ST_OK;
-			break;
-
-		case SSL_ST_OK:
-			BUF_MEM_free(s->init_buf);
-			ssl_free_wbio_buffer(s);
-			s->init_buf=NULL;
-			s->init_num=0;
-		/*	ERR_clear_error();*/
-
-			ssl_update_cache(s,SSL_SESS_CACHE_SERVER);
-
-			s->ctx->stats.sess_accept_good++;
-			/* s->server=1; */
-			ret=1;
-
-			if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
-
-			goto end;
-			/* BREAK; */
-
-		default:
-			SSLerr(SSL_F_SSL2_ACCEPT,SSL_R_UNKNOWN_STATE);
-			ret= -1;
-			goto end;
-			/* BREAK; */
-			}
-		
-		if ((cb != NULL) && (s->state != state))
-			{
-			new_state=s->state;
-			s->state=state;
-			cb(s,SSL_CB_ACCEPT_LOOP,1);
-			s->state=new_state;
-			}
-		}
-end:
-	s->in_handshake--;
-	if (cb != NULL)
-		cb(s,SSL_CB_ACCEPT_EXIT,ret);
-	return(ret);
-	}
-
-static int get_client_master_key(SSL *s)
-	{
-	int is_export,i,n,keya,ek;
-	unsigned long len;
-	unsigned char *p;
-	const SSL_CIPHER *cp;
-	const EVP_CIPHER *c;
-	const EVP_MD *md;
-
-	p=(unsigned char *)s->init_buf->data;
-	if (s->state == SSL2_ST_GET_CLIENT_MASTER_KEY_A)
-		{
-		i=ssl2_read(s,(char *)&(p[s->init_num]),10-s->init_num);
-
-		if (i < (10-s->init_num))
-			return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
-		s->init_num = 10;
-
-		if (*(p++) != SSL2_MT_CLIENT_MASTER_KEY)
-			{
-			if (p[-1] != SSL2_MT_ERROR)
-				{
-				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-				SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_READ_WRONG_PACKET_TYPE);
-				}
-			else
-				SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_PEER_ERROR);
-			return(-1);
-			}
-
-		cp=ssl2_get_cipher_by_char(p);
-		if (cp == NULL)
-			{
-			ssl2_return_error(s,SSL2_PE_NO_CIPHER);
-			SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_NO_CIPHER_MATCH);
-			return(-1);
-			}
-		s->session->cipher= cp;
-
-		p+=3;
-		n2s(p,i); s->s2->tmp.clear=i;
-		n2s(p,i); s->s2->tmp.enc=i;
-		n2s(p,i);
-		if(i > SSL_MAX_KEY_ARG_LENGTH)
-			{
-			ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-			SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, SSL_R_KEY_ARG_TOO_LONG);
-			return -1;
-			}
-		s->session->key_arg_length=i;
-		s->state=SSL2_ST_GET_CLIENT_MASTER_KEY_B;
-		}
-
-	/* SSL2_ST_GET_CLIENT_MASTER_KEY_B */
-	p=(unsigned char *)s->init_buf->data;
-	if (s->init_buf->length < SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
-		{
-		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-		SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
-		return -1;
-		}
-	keya=s->session->key_arg_length;
-	len = 10 + (unsigned long)s->s2->tmp.clear + (unsigned long)s->s2->tmp.enc + (unsigned long)keya;
-	if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
-		{
-		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-		SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_MESSAGE_TOO_LONG);
-		return -1;
-		}
-	n = (int)len - s->init_num;
-	i = ssl2_read(s,(char *)&(p[s->init_num]),n);
-	if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_MASTER_KEY,i));
-	if (s->msg_callback)
-		s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-MASTER-KEY */
-	p += 10;
-
-	memcpy(s->session->key_arg,&(p[s->s2->tmp.clear+s->s2->tmp.enc]),
-		(unsigned int)keya);
-
-	if (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL)
-		{
-		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-		SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_NO_PRIVATEKEY);
-		return(-1);
-		}
-	i=ssl_rsa_private_decrypt(s->cert,s->s2->tmp.enc,
-		&(p[s->s2->tmp.clear]),&(p[s->s2->tmp.clear]),
-		(s->s2->ssl2_rollback)?RSA_SSLV23_PADDING:RSA_PKCS1_PADDING);
-
-	is_export=SSL_C_IS_EXPORT(s->session->cipher);
-	
-	if (!ssl_cipher_get_evp(s->session,&c,&md,NULL,NULL))
-		{
-		ssl2_return_error(s,SSL2_PE_NO_CIPHER);
-		SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS);
-		return(0);
-		}
-
-	if (s->session->cipher->algorithm2 & SSL2_CF_8_BYTE_ENC)
-		{
-		is_export=1;
-		ek=8;
-		}
-	else
-		ek=5;
-
-	/* bad decrypt */
-#if 1
-	/* If a bad decrypt, continue with protocol but with a
-	 * random master secret (Bleichenbacher attack) */
-	if ((i < 0) ||
-		((!is_export && (i != EVP_CIPHER_key_length(c)))
-		|| (is_export && ((i != ek) || (s->s2->tmp.clear+(unsigned int)i !=
-			(unsigned int)EVP_CIPHER_key_length(c))))))
-		{
-		ERR_clear_error();
-		if (is_export)
-			i=ek;
-		else
-			i=EVP_CIPHER_key_length(c);
-		if (RAND_pseudo_bytes(p,i) <= 0)
-			return 0;
-		}
-#else
-	if (i < 0)
-		{
-		error=1;
-		SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_BAD_RSA_DECRYPT);
-		}
-	/* incorrect number of key bytes for non export cipher */
-	else if ((!is_export && (i != EVP_CIPHER_key_length(c)))
-		|| (is_export && ((i != ek) || (s->s2->tmp.clear+i !=
-			EVP_CIPHER_key_length(c)))))
-		{
-		error=1;
-		SSLerr(SSL_F_GET_CLIENT_MASTER_KEY,SSL_R_WRONG_NUMBER_OF_KEY_BITS);
-		}
-	if (error)
-		{
-		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-		return(-1);
-		}
-#endif
-
-	if (is_export) i+=s->s2->tmp.clear;
-
-	if (i > SSL_MAX_MASTER_KEY_LENGTH)
-		{
-		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-		SSLerr(SSL_F_GET_CLIENT_MASTER_KEY, ERR_R_INTERNAL_ERROR);
-		return -1;
-		}
-	s->session->master_key_length=i;
-	memcpy(s->session->master_key,p,(unsigned int)i);
-	return(1);
-	}
-
-static int get_client_hello(SSL *s)
-	{
-	int i,n;
-	unsigned long len;
-	unsigned char *p;
-	STACK_OF(SSL_CIPHER) *cs; /* a stack of SSL_CIPHERS */
-	STACK_OF(SSL_CIPHER) *cl; /* the ones we want to use */
-	STACK_OF(SSL_CIPHER) *prio, *allow;
-	int z;
-
-	/* This is a bit of a hack to check for the correct packet
-	 * type the first time round. */
-	if (s->state == SSL2_ST_GET_CLIENT_HELLO_A)
-		{
-		s->first_packet=1;
-		s->state=SSL2_ST_GET_CLIENT_HELLO_B;
-		}
-
-	p=(unsigned char *)s->init_buf->data;
-	if (s->state == SSL2_ST_GET_CLIENT_HELLO_B)
-		{
-		i=ssl2_read(s,(char *)&(p[s->init_num]),9-s->init_num);
-		if (i < (9-s->init_num)) 
-			return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
-		s->init_num = 9;
-	
-		if (*(p++) != SSL2_MT_CLIENT_HELLO)
-			{
-			if (p[-1] != SSL2_MT_ERROR)
-				{
-				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-				SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_READ_WRONG_PACKET_TYPE);
-				}
-			else
-				SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_PEER_ERROR);
-			return(-1);
-			}
-		n2s(p,i);
-		if (i < s->version) s->version=i;
-		n2s(p,i); s->s2->tmp.cipher_spec_length=i;
-		n2s(p,i); s->s2->tmp.session_id_length=i;
-		n2s(p,i); s->s2->challenge_length=i;
-		if (	(i < SSL2_MIN_CHALLENGE_LENGTH) ||
-			(i > SSL2_MAX_CHALLENGE_LENGTH))
-			{
-			ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-			SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_INVALID_CHALLENGE_LENGTH);
-			return(-1);
-			}
-		s->state=SSL2_ST_GET_CLIENT_HELLO_C;
-		}
-
-	/* SSL2_ST_GET_CLIENT_HELLO_C */
-	p=(unsigned char *)s->init_buf->data;
-	len = 9 + (unsigned long)s->s2->tmp.cipher_spec_length + (unsigned long)s->s2->challenge_length + (unsigned long)s->s2->tmp.session_id_length;
-	if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
-		{
-		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-		SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_MESSAGE_TOO_LONG);
-		return -1;
-		}
-	n = (int)len - s->init_num;
-	i = ssl2_read(s,(char *)&(p[s->init_num]),n);
-	if (i != n) return(ssl2_part_read(s,SSL_F_GET_CLIENT_HELLO,i));
-	if (s->msg_callback)
-		s->msg_callback(0, s->version, 0, p, (size_t)len, s, s->msg_callback_arg); /* CLIENT-HELLO */
-	p += 9;
-
-	/* get session-id before cipher stuff so we can get out session
-	 * structure if it is cached */
-	/* session-id */
-	if ((s->s2->tmp.session_id_length != 0) && 
-		(s->s2->tmp.session_id_length != SSL2_SSL_SESSION_ID_LENGTH))
-		{
-		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-		SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_BAD_SSL_SESSION_ID_LENGTH);
-		return(-1);
-		}
-
-	if (s->s2->tmp.session_id_length == 0)
-		{
-		if (!ssl_get_new_session(s,1))
-			{
-			ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-			return(-1);
-			}
-		}
-	else
-		{
-		i=ssl_get_prev_session(s,&(p[s->s2->tmp.cipher_spec_length]),
-			s->s2->tmp.session_id_length, NULL);
-		if (i == 1)
-			{ /* previous session */
-			s->hit=1;
-			}
-		else if (i == -1)
-			{
-			ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-			return(-1);
-			}
-		else
-			{
-			if (s->cert == NULL)
-				{
-				ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
-				SSLerr(SSL_F_GET_CLIENT_HELLO,SSL_R_NO_CERTIFICATE_SET);
-				return(-1);
-				}
-
-			if (!ssl_get_new_session(s,1))
-				{
-				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-				return(-1);
-				}
-			}
-		}
-
-	if (!s->hit)
-		{
-		cs=ssl_bytes_to_cipher_list(s,p,s->s2->tmp.cipher_spec_length,
-			&s->session->ciphers);
-		if (cs == NULL) goto mem_err;
-
-		cl=SSL_get_ciphers(s);
-
-		if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
-		    {
-		    prio=sk_SSL_CIPHER_dup(cl);
-		    if (prio == NULL) goto mem_err;
-		    allow = cs;
-		    }
-		else
-		    {
-		    prio = cs;
-		    allow = cl;
-		    }
-		for (z=0; z<sk_SSL_CIPHER_num(prio); z++)
-			{
-			if (sk_SSL_CIPHER_find(allow,sk_SSL_CIPHER_value(prio,z)) < 0)
-				{
-				(void)sk_SSL_CIPHER_delete(prio,z);
-				z--;
-				}
-			}
-		if (s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
-		    {
-		    sk_SSL_CIPHER_free(s->session->ciphers);
-		    s->session->ciphers = prio;
-		    }
-		/* s->session->ciphers should now have a list of
-		 * ciphers that are on both the client and server.
-		 * This list is ordered by the order the client sent
-		 * the ciphers or in the order of the server's preference
-		 * if SSL_OP_CIPHER_SERVER_PREFERENCE was set.
-		 */
-		}
-	p+=s->s2->tmp.cipher_spec_length;
-	/* done cipher selection */
-
-	/* session id extracted already */
-	p+=s->s2->tmp.session_id_length;
-
-	/* challenge */
-	if (s->s2->challenge_length > sizeof s->s2->challenge)
-		{
-		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-		SSLerr(SSL_F_GET_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
-		return -1;
-		}
-	memcpy(s->s2->challenge,p,(unsigned int)s->s2->challenge_length);
-	return(1);
-mem_err:
-	SSLerr(SSL_F_GET_CLIENT_HELLO,ERR_R_MALLOC_FAILURE);
-	return(0);
-	}
-
-static int server_hello(SSL *s)
-	{
-	unsigned char *p,*d;
-	int n,hit;
-
-	p=(unsigned char *)s->init_buf->data;
-	if (s->state == SSL2_ST_SEND_SERVER_HELLO_A)
-		{
-		d=p+11;
-		*(p++)=SSL2_MT_SERVER_HELLO;		/* type */
-		hit=s->hit;
-		*(p++)=(unsigned char)hit;
-#if 1
-		if (!hit)
-			{
-			if (s->session->sess_cert != NULL)
-				/* This can't really happen because get_client_hello
-				 * has called ssl_get_new_session, which does not set
-				 * sess_cert. */
-				ssl_sess_cert_free(s->session->sess_cert);
-			s->session->sess_cert = ssl_sess_cert_new();
-			if (s->session->sess_cert == NULL)
-				{
-				SSLerr(SSL_F_SERVER_HELLO, ERR_R_MALLOC_FAILURE);
-				return(-1);
-				}
-			}
-		/* If 'hit' is set, then s->sess_cert may be non-NULL or NULL,
-		 * depending on whether it survived in the internal cache
-		 * or was retrieved from an external cache.
-		 * If it is NULL, we cannot put any useful data in it anyway,
-		 * so we don't touch it.
-		 */
-
-#else /* That's what used to be done when cert_st and sess_cert_st were
-	   * the same. */
-		if (!hit)
-			{			/* else add cert to session */
-			CRYPTO_add(&s->cert->references,1,CRYPTO_LOCK_SSL_CERT);
-			if (s->session->sess_cert != NULL)
-				ssl_cert_free(s->session->sess_cert);
-			s->session->sess_cert=s->cert;		
-			}
-		else	/* We have a session id-cache hit, if the
-			 * session-id has no certificate listed against
-			 * the 'cert' structure, grab the 'old' one
-			 * listed against the SSL connection */
-			{
-			if (s->session->sess_cert == NULL)
-				{
-				CRYPTO_add(&s->cert->references,1,
-					CRYPTO_LOCK_SSL_CERT);
-				s->session->sess_cert=s->cert;
-				}
-			}
-#endif
-
-		if (s->cert == NULL)
-			{
-			ssl2_return_error(s,SSL2_PE_NO_CERTIFICATE);
-			SSLerr(SSL_F_SERVER_HELLO,SSL_R_NO_CERTIFICATE_SPECIFIED);
-			return(-1);
-			}
-
-		if (hit)
-			{
-			*(p++)=0;		/* no certificate type */
-			s2n(s->version,p);	/* version */
-			s2n(0,p);		/* cert len */
-			s2n(0,p);		/* ciphers len */
-			}
-		else
-			{
-			/* EAY EAY */
-			/* put certificate type */
-			*(p++)=SSL2_CT_X509_CERTIFICATE;
-			s2n(s->version,p);	/* version */
-			n=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
-			s2n(n,p);		/* certificate length */
-			i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&d);
-			n=0;
-			
-			/* lets send out the ciphers we like in the
-			 * prefered order */
-			n=ssl_cipher_list_to_bytes(s,s->session->ciphers,d,0);
-			d+=n;
-			s2n(n,p);		/* add cipher length */
-			}
-
-		/* make and send conn_id */
-		s2n(SSL2_CONNECTION_ID_LENGTH,p);	/* add conn_id length */
-		s->s2->conn_id_length=SSL2_CONNECTION_ID_LENGTH;
-		if (RAND_pseudo_bytes(s->s2->conn_id,(int)s->s2->conn_id_length) <= 0)
-			return -1;
-		memcpy(d,s->s2->conn_id,SSL2_CONNECTION_ID_LENGTH);
-		d+=SSL2_CONNECTION_ID_LENGTH;
-
-		s->state=SSL2_ST_SEND_SERVER_HELLO_B;
-		s->init_num=d-(unsigned char *)s->init_buf->data;
-		s->init_off=0;
-		}
-	/* SSL2_ST_SEND_SERVER_HELLO_B */
- 	/* If we are using TCP/IP, the performance is bad if we do 2
- 	 * writes without a read between them.  This occurs when
- 	 * Session-id reuse is used, so I will put in a buffering module
- 	 */
- 	if (s->hit)
- 		{
-		if (!ssl_init_wbio_buffer(s,1)) return(-1);
- 		}
- 
-	return(ssl2_do_write(s));
-	}
-
-static int get_client_finished(SSL *s)
-	{
-	unsigned char *p;
-	int i, n;
-	unsigned long len;
-
-	p=(unsigned char *)s->init_buf->data;
-	if (s->state == SSL2_ST_GET_CLIENT_FINISHED_A)
-		{
-		i=ssl2_read(s,(char *)&(p[s->init_num]),1-s->init_num);
-		if (i < 1-s->init_num)
-			return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
-		s->init_num += i;
-
-		if (*p != SSL2_MT_CLIENT_FINISHED)
-			{
-			if (*p != SSL2_MT_ERROR)
-				{
-				ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-				SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_READ_WRONG_PACKET_TYPE);
-				}
-			else
-				{
-				SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_PEER_ERROR);
-				/* try to read the error message */
-				i=ssl2_read(s,(char *)&(p[s->init_num]),3-s->init_num);
-				return ssl2_part_read(s,SSL_F_GET_SERVER_VERIFY,i);
-				}
-			return(-1);
-			}
-		s->state=SSL2_ST_GET_CLIENT_FINISHED_B;
-		}
-
-	/* SSL2_ST_GET_CLIENT_FINISHED_B */
-	if (s->s2->conn_id_length > sizeof s->s2->conn_id)
-		{
-		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-		SSLerr(SSL_F_GET_CLIENT_FINISHED, ERR_R_INTERNAL_ERROR);
-		return -1;
-		}
-	len = 1 + (unsigned long)s->s2->conn_id_length;
-	n = (int)len - s->init_num;
-	i = ssl2_read(s,(char *)&(p[s->init_num]),n);
-	if (i < n)
-		{
-		return(ssl2_part_read(s,SSL_F_GET_CLIENT_FINISHED,i));
-		}
-	if (s->msg_callback)
-		s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-FINISHED */
-	p += 1;
-	if (memcmp(p,s->s2->conn_id,s->s2->conn_id_length) != 0)
-		{
-		ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-		SSLerr(SSL_F_GET_CLIENT_FINISHED,SSL_R_CONNECTION_ID_IS_DIFFERENT);
-		return(-1);
-		}
-	return(1);
-	}
-
-static int server_verify(SSL *s)
-	{
-	unsigned char *p;
-
-	if (s->state == SSL2_ST_SEND_SERVER_VERIFY_A)
-		{
-		p=(unsigned char *)s->init_buf->data;
-		*(p++)=SSL2_MT_SERVER_VERIFY;
-		if (s->s2->challenge_length > sizeof s->s2->challenge)
-			{
-			SSLerr(SSL_F_SERVER_VERIFY, ERR_R_INTERNAL_ERROR);
-			return -1;
-			}
-		memcpy(p,s->s2->challenge,(unsigned int)s->s2->challenge_length);
-		/* p+=s->s2->challenge_length; */
-
-		s->state=SSL2_ST_SEND_SERVER_VERIFY_B;
-		s->init_num=s->s2->challenge_length+1;
-		s->init_off=0;
-		}
-	return(ssl2_do_write(s));
-	}
-
-static int server_finish(SSL *s)
-	{
-	unsigned char *p;
-
-	if (s->state == SSL2_ST_SEND_SERVER_FINISHED_A)
-		{
-		p=(unsigned char *)s->init_buf->data;
-		*(p++)=SSL2_MT_SERVER_FINISHED;
-
-		if (s->session->session_id_length > sizeof s->session->session_id)
-			{
-			SSLerr(SSL_F_SERVER_FINISH, ERR_R_INTERNAL_ERROR);
-			return -1;
-			}
-		memcpy(p,s->session->session_id, (unsigned int)s->session->session_id_length);
-		/* p+=s->session->session_id_length; */
-
-		s->state=SSL2_ST_SEND_SERVER_FINISHED_B;
-		s->init_num=s->session->session_id_length+1;
-		s->init_off=0;
-		}
-
-	/* SSL2_ST_SEND_SERVER_FINISHED_B */
-	return(ssl2_do_write(s));
-	}
-
-/* send the request and check the response */
-static int request_certificate(SSL *s)
-	{
-	const unsigned char *cp;
-	unsigned char *p,*p2,*buf2;
-	unsigned char *ccd;
-	int i,j,ctype,ret= -1;
-	unsigned long len;
-	X509 *x509=NULL;
-	STACK_OF(X509) *sk=NULL;
-
-	ccd=s->s2->tmp.ccl;
-	if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_A)
-		{
-		p=(unsigned char *)s->init_buf->data;
-		*(p++)=SSL2_MT_REQUEST_CERTIFICATE;
-		*(p++)=SSL2_AT_MD5_WITH_RSA_ENCRYPTION;
-		if (RAND_pseudo_bytes(ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH) <= 0)
-			return -1;
-		memcpy(p,ccd,SSL2_MIN_CERT_CHALLENGE_LENGTH);
-
-		s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_B;
-		s->init_num=SSL2_MIN_CERT_CHALLENGE_LENGTH+2;
-		s->init_off=0;
-		}
-
-	if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_B)
-		{
-		i=ssl2_do_write(s);
-		if (i <= 0)
-			{
-			ret=i;
-			goto end;
-			}
-
-		s->init_num=0;
-		s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_C;
-		}
-
-	if (s->state == SSL2_ST_SEND_REQUEST_CERTIFICATE_C)
-		{
-		p=(unsigned char *)s->init_buf->data;
-		i=ssl2_read(s,(char *)&(p[s->init_num]),6-s->init_num); /* try to read 6 octets ... */
-		if (i < 3-s->init_num) /* ... but don't call ssl2_part_read now if we got at least 3
-		                        * (probably NO-CERTIFICATE-ERROR) */
-			{
-			ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
-			goto end;
-			}
-		s->init_num += i;
-
-		if ((s->init_num >= 3) && (p[0] == SSL2_MT_ERROR))
-			{
-			n2s(p,i);
-			if (i != SSL2_PE_NO_CERTIFICATE)
-				{
-				/* not the error message we expected -- let ssl2_part_read handle it */
-				s->init_num -= 3;
-				ret = ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE, 3);
-				goto end;
-				}
-
-			if (s->msg_callback)
-				s->msg_callback(0, s->version, 0, p, 3, s, s->msg_callback_arg); /* ERROR */
-
-			/* this is the one place where we can recover from an SSL 2.0 error */
-
-			if (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)
-				{
-				ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
-				SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE);
-				goto end;
-				}
-			ret=1;
-			goto end;
-			}
-		if ((*(p++) != SSL2_MT_CLIENT_CERTIFICATE) || (s->init_num < 6))
-			{
-			ssl2_return_error(s,SSL2_PE_UNDEFINED_ERROR);
-			SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_SHORT_READ);
-			goto end;
-			}
-		if (s->init_num != 6)
-			{
-			SSLerr(SSL_F_REQUEST_CERTIFICATE, ERR_R_INTERNAL_ERROR);
-			goto end;
-			}
-		
-		/* ok we have a response */
-		/* certificate type, there is only one right now. */
-		ctype= *(p++);
-		if (ctype != SSL2_AT_MD5_WITH_RSA_ENCRYPTION)
-			{
-			ssl2_return_error(s,SSL2_PE_UNSUPPORTED_CERTIFICATE_TYPE);
-			SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_RESPONSE_ARGUMENT);
-			goto end;
-			}
-		n2s(p,i); s->s2->tmp.clen=i;
-		n2s(p,i); s->s2->tmp.rlen=i;
-		s->state=SSL2_ST_SEND_REQUEST_CERTIFICATE_D;
-		}
-
-	/* SSL2_ST_SEND_REQUEST_CERTIFICATE_D */
-	p=(unsigned char *)s->init_buf->data;
-	len = 6 + (unsigned long)s->s2->tmp.clen + (unsigned long)s->s2->tmp.rlen;
-	if (len > SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER)
-		{
-		SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_MESSAGE_TOO_LONG);
-		goto end;
-		}
-	j = (int)len - s->init_num;
-	i = ssl2_read(s,(char *)&(p[s->init_num]),j);
-	if (i < j) 
-		{
-		ret=ssl2_part_read(s,SSL_F_REQUEST_CERTIFICATE,i);
-		goto end;
-		}
-	if (s->msg_callback)
-		s->msg_callback(0, s->version, 0, p, len, s, s->msg_callback_arg); /* CLIENT-CERTIFICATE */
-	p += 6;
-
-	cp = p;
-	x509=(X509 *)d2i_X509(NULL,&cp,(long)s->s2->tmp.clen);
-	if (x509 == NULL)
-		{
-		SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_X509_LIB);
-		goto msg_end;
-		}
-
-	if (((sk=sk_X509_new_null()) == NULL) || (!sk_X509_push(sk,x509)))
-		{
-		SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
-		goto msg_end;
-		}
-
-	i=ssl_verify_cert_chain(s,sk);
-
-	if (i > 0)	/* we like the packet, now check the chksum */
-		{
-		EVP_MD_CTX ctx;
-		EVP_PKEY *pkey=NULL;
-
-		EVP_MD_CTX_init(&ctx);
-		if (!EVP_VerifyInit_ex(&ctx,s->ctx->rsa_md5, NULL)
-		    || !EVP_VerifyUpdate(&ctx,s->s2->key_material,
-					 s->s2->key_material_length)
-		    || !EVP_VerifyUpdate(&ctx,ccd,
-					 SSL2_MIN_CERT_CHALLENGE_LENGTH))
-			goto msg_end;
-
-		i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,NULL);
-		buf2=OPENSSL_malloc((unsigned int)i);
-		if (buf2 == NULL)
-			{
-			SSLerr(SSL_F_REQUEST_CERTIFICATE,ERR_R_MALLOC_FAILURE);
-			goto msg_end;
-			}
-		p2=buf2;
-		i=i2d_X509(s->cert->pkeys[SSL_PKEY_RSA_ENC].x509,&p2);
-		if (!EVP_VerifyUpdate(&ctx,buf2,(unsigned int)i))
-			{
-			OPENSSL_free(buf2);
-			goto msg_end;
-			}
-		OPENSSL_free(buf2);
-
-		pkey=X509_get_pubkey(x509);
-		if (pkey == NULL) goto end;
-		i=EVP_VerifyFinal(&ctx,cp,s->s2->tmp.rlen,pkey);
-		EVP_PKEY_free(pkey);
-		EVP_MD_CTX_cleanup(&ctx);
-
-		if (i > 0)
-			{
-			if (s->session->peer != NULL)
-				X509_free(s->session->peer);
-			s->session->peer=x509;
-			CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
-			s->session->verify_result = s->verify_result;
-			ret=1;
-			goto end;
-			}
-		else
-			{
-			SSLerr(SSL_F_REQUEST_CERTIFICATE,SSL_R_BAD_CHECKSUM);
-			goto msg_end;
-			}
-		}
-	else
-		{
-msg_end:
-		ssl2_return_error(s,SSL2_PE_BAD_CERTIFICATE);
-		}
-end:
-	sk_X509_free(sk);
-	X509_free(x509);
-	return(ret);
-	}
-
-static int ssl_rsa_private_decrypt(CERT *c, int len, unsigned char *from,
-	     unsigned char *to, int padding)
-	{
-	RSA *rsa;
-	int i;
-
-	if ((c == NULL) || (c->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL))
-		{
-		SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_NO_PRIVATEKEY);
-		return(-1);
-		}
-	if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey->type != EVP_PKEY_RSA)
-		{
-		SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,SSL_R_PUBLIC_KEY_IS_NOT_RSA);
-		return(-1);
-		}
-	rsa=c->pkeys[SSL_PKEY_RSA_ENC].privatekey->pkey.rsa;
-
-	/* we have the public key */
-	i=RSA_private_decrypt(len,from,to,rsa,padding);
-	if (i < 0)
-		SSLerr(SSL_F_SSL_RSA_PRIVATE_DECRYPT,ERR_R_RSA_LIB);
-	return(i);
-	}
-#else /* !OPENSSL_NO_SSL2 */
-
-# if PEDANTIC
-static void *dummy=&dummy;
-# endif
-
-#endif