/*! \file ssl/ssl_lib.c

  *  \brief Version independent SSL functions.

  */

 /* 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).

  *

  */

 /* ====================================================================

  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.

  * ECC cipher suite support in OpenSSL originally developed by 

  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.

  */

 /*

  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

  */

 #ifdef REF_CHECK

 #  include <assert.h>

 #endif

 #include <stdio.h>

 #include "ssl_locl.h"

 #include "kssl_lcl.h"

 #include <openssl/objects.h>

 #include <openssl/lhash.h>

 #include <openssl/x509v3.h>

 #ifndef OPENSSL_NO_DH

 #include <openssl/dh.h>

 #endif

 #ifdef EMULATOR

 	#include "libssl_wsd.h"

 #endif

 const char *SSL_version_str=OPENSSL_VERSION_TEXT;

 #ifdef EMULATOR

 	GET_GLOBAL_VAR_FROM_TLS(ssl3_undef_enc_method,ssl_lib,SSL3_ENC_METHOD)

 	#define ssl3_undef_enc_method (GET_WSD_VAR_NAME(ssl3_undef_enc_method,ssl_lib,g)())

 #endif

 #ifndef EMULATOR

 SSL3_ENC_METHOD ssl3_undef_enc_method={

 #else

 const SSL3_ENC_METHOD temp_ssl3_undef_enc_method={

 #endif

 	/* evil casts, but these functions are only called if there's a library bug */

 	(int (*)(SSL *,int))ssl_undefined_function,

 	(int (*)(SSL *, unsigned char *, int))ssl_undefined_function,

 	ssl_undefined_function,

 	(int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,

 	(int (*)(SSL*, int))ssl_undefined_function,

 	(int (*)(SSL *, EVP_MD_CTX *, EVP_MD_CTX *, const char*, int, unsigned char *))ssl_undefined_function,

 	0,	/* finish_mac_length */

 	(int (*)(SSL *, EVP_MD_CTX *, unsigned char *))ssl_undefined_function,

 	NULL,	/* client_finished_label */

 	0,	/* client_finished_label_len */

 	NULL,	/* server_finished_label */

 	0,	/* server_finished_label_len */

 	(int (*)(int))ssl_undefined_function

 	};

 EXPORT_C int SSL_clear(SSL *s)

 	{

 	if (s->method == NULL)

 		{

 		SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);

 		return(0);

 		}

 	if (ssl_clear_bad_session(s))

 		{

 		SSL_SESSION_free(s->session);

 		s->session=NULL;

 		}

 	s->error=0;

 	s->hit=0;

 	s->shutdown=0;

 #if 0 /* Disabled since version 1.10 of this file (early return not

        * needed because SSL_clear is not called when doing renegotiation) */

 	/* This is set if we are doing dynamic renegotiation so keep

 	 * the old cipher.  It is sort of a SSL_clear_lite :-) */

 	if (s->new_session) return(1);

 #else

 	if (s->new_session)

 		{

 		SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);

 		return 0;

 		}

 #endif

 	s->type=0;

 	s->state=SSL_ST_BEFORE|((s->server)?SSL_ST_ACCEPT:SSL_ST_CONNECT);

 	s->version=s->method->version;

 	s->client_version=s->version;

 	s->rwstate=SSL_NOTHING;

 	s->rstate=SSL_ST_READ_HEADER;

 #if 0

 	s->read_ahead=s->ctx->read_ahead;

 #endif

 	if (s->init_buf != NULL)

 		{

 		BUF_MEM_free(s->init_buf);

 		s->init_buf=NULL;

 		}

 	ssl_clear_cipher_ctx(s);

 	s->first_packet=0;

 #if 1

 	/* Check to see if we were changed into a different method, if

 	 * so, revert back if we are not doing session-id reuse. */

 	if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))

 		{

 		s->method->ssl_free(s);

 		s->method=s->ctx->method;

 		if (!s->method->ssl_new(s))

 			return(0);

 		}

 	else

 #endif

 		s->method->ssl_clear(s);

 	return(1);

 	}

 /** Used to change an SSL_CTXs default SSL method type */

 EXPORT_C int SSL_CTX_set_ssl_version(SSL_CTX *ctx,SSL_METHOD *meth)

 	{

 	STACK_OF(SSL_CIPHER) *sk;

 	ctx->method=meth;

 	sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),

 		&(ctx->cipher_list_by_id),SSL_DEFAULT_CIPHER_LIST);

 	if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))

 		{

 		SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);

 		return(0);

 		}

 	return(1);

 	}

 EXPORT_C SSL *SSL_new(SSL_CTX *ctx)

 	{

 	SSL *s;

 	if (ctx == NULL)

 		{

 		SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);

 		return(NULL);

 		}

 	if (ctx->method == NULL)

 		{

 		SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);

 		return(NULL);

 		}

 	s=(SSL *)OPENSSL_malloc(sizeof(SSL));

 	if (s == NULL) goto err;

 	memset(s,0,sizeof(SSL));

 #ifndef	OPENSSL_NO_KRB5

 	s->kssl_ctx = kssl_ctx_new();

 #endif	/* OPENSSL_NO_KRB5 */

 	s->options=ctx->options;

 	s->mode=ctx->mode;

 	s->max_cert_list=ctx->max_cert_list;

 	if (ctx->cert != NULL)

 		{

 		/* Earlier library versions used to copy the pointer to

 		 * the CERT, not its contents; only when setting new

 		 * parameters for the per-SSL copy, ssl_cert_new would be

 		 * called (and the direct reference to the per-SSL_CTX

 		 * settings would be lost, but those still were indirectly

 		 * accessed for various purposes, and for that reason they

 		 * used to be known as s->ctx->default_cert).

 		 * Now we don't look at the SSL_CTX's CERT after having

 		 * duplicated it once. */

 		s->cert = ssl_cert_dup(ctx->cert);

 		if (s->cert == NULL)

 			goto err;

 		}

 	else

 		s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */

 	s->read_ahead=ctx->read_ahead;

 	s->msg_callback=ctx->msg_callback;

 	s->msg_callback_arg=ctx->msg_callback_arg;

 	s->verify_mode=ctx->verify_mode;

 #if 0

 	s->verify_depth=ctx->verify_depth;

 #endif

 	s->sid_ctx_length=ctx->sid_ctx_length;

 	OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);

 	memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));

 	s->verify_callback=ctx->default_verify_callback;

 	s->generate_session_id=ctx->generate_session_id;

 	s->param = X509_VERIFY_PARAM_new();

 	if (!s->param)

 		goto err;

 	X509_VERIFY_PARAM_inherit(s->param, ctx->param);

 #if 0

 	s->purpose = ctx->purpose;

 	s->trust = ctx->trust;

 #endif

 	s->quiet_shutdown=ctx->quiet_shutdown;

 	CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);

 	s->ctx=ctx;

 	s->verify_result=X509_V_OK;

 	s->method=ctx->method;

 	if (!s->method->ssl_new(s))

 		goto err;

 	s->references=1;

 	s->server=(ctx->method->ssl_accept == ssl_undefined_function)?0:1;

 	SSL_clear(s);

 	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);

 	return(s);

 err:

 	if (s != NULL)

 		{

 		if (s->cert != NULL)

 			ssl_cert_free(s->cert);

 		if (s->ctx != NULL)

 			SSL_CTX_free(s->ctx); /* decrement reference count */

 		OPENSSL_free(s);

 		}

 	SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);

 	return(NULL);

 	}

 EXPORT_C int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,

 				   unsigned int sid_ctx_len)

     {

     if(sid_ctx_len > sizeof ctx->sid_ctx)

 	{

 	SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);

 	return 0;

 	}

     ctx->sid_ctx_length=sid_ctx_len;

     memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);

     return 1;

     }

 EXPORT_C int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,

 			       unsigned int sid_ctx_len)

     {

     if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)

 	{

 	SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);

 	return 0;

 	}

     ssl->sid_ctx_length=sid_ctx_len;

     memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);

     return 1;

     }

 EXPORT_C int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)

 	{

 	CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);

 	ctx->generate_session_id = cb;

 	CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);

 	return 1;

 	}

 EXPORT_C int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)

 	{

 	CRYPTO_w_lock(CRYPTO_LOCK_SSL);

 	ssl->generate_session_id = cb;

 	CRYPTO_w_unlock(CRYPTO_LOCK_SSL);

 	return 1;

 	}

 EXPORT_C int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,

 				unsigned int id_len)

 	{

 	/* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how

 	 * we can "construct" a session to give us the desired check - ie. to

 	 * find if there's a session in the hash table that would conflict with

 	 * any new session built out of this id/id_len and the ssl_version in

 	 * use by this SSL. */

 	SSL_SESSION r, *p;

 	if(id_len > sizeof r.session_id)

 		return 0;

 	r.ssl_version = ssl->version;

 	r.session_id_length = id_len;

 	memcpy(r.session_id, id, id_len);

 	/* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a

 	 * callback is calling us to check the uniqueness of a shorter ID, it

 	 * must be compared as a padded-out ID because that is what it will be

 	 * converted to when the callback has finished choosing it. */

 	if((r.ssl_version == SSL2_VERSION) &&

 			(id_len < SSL2_SSL_SESSION_ID_LENGTH))

 		{

 		memset(r.session_id + id_len, 0,

 			SSL2_SSL_SESSION_ID_LENGTH - id_len);

 		r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;

 		}

 	CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);

 	p = (SSL_SESSION *)lh_retrieve(ssl->ctx->sessions, &r);

 	CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);

 	return (p != NULL);

 	}

 EXPORT_C int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)

 	{

 	return X509_VERIFY_PARAM_set_purpose(s->param, purpose);

 	}

 EXPORT_C int SSL_set_purpose(SSL *s, int purpose)

 	{

 	return X509_VERIFY_PARAM_set_purpose(s->param, purpose);

 	}

 EXPORT_C int SSL_CTX_set_trust(SSL_CTX *s, int trust)

 	{

 	return X509_VERIFY_PARAM_set_trust(s->param, trust);

 	}

 EXPORT_C int SSL_set_trust(SSL *s, int trust)

 	{

 	return X509_VERIFY_PARAM_set_trust(s->param, trust);

 	}

 EXPORT_C void SSL_free(SSL *s)

 	{

 	int i;

 	if(s == NULL)

 	    return;

 	i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);

 #ifdef REF_PRINT

 	REF_PRINT("SSL",s);

 #endif

 	if (i > 0) return;

 #ifdef REF_CHECK

 	if (i < 0)

 		{

 		fprintf(stderr,"SSL_free, bad reference count\n");

 		abort(); /* ok */

 		}

 #endif

 	if (s->param)

 		X509_VERIFY_PARAM_free(s->param);

 	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data);

 	if (s->bbio != NULL)

 		{

 		/* If the buffering BIO is in place, pop it off */

 		if (s->bbio == s->wbio)

 			{

 			s->wbio=BIO_pop(s->wbio);

 			}

 		BIO_free(s->bbio);

 		s->bbio=NULL;

 		}

 	if (s->rbio != NULL)

 		BIO_free_all(s->rbio);

 	if ((s->wbio != NULL) && (s->wbio != s->rbio))

 		BIO_free_all(s->wbio);

 	if (s->init_buf != NULL) BUF_MEM_free(s->init_buf);

 	/* add extra stuff */

 	if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);

 	if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);

 	/* Make the next call work :-) */

 	if (s->session != NULL)

 		{

 		ssl_clear_bad_session(s);

 		SSL_SESSION_free(s->session);

 		}

 	ssl_clear_cipher_ctx(s);

 	if (s->cert != NULL) ssl_cert_free(s->cert);

 	/* Free up if allocated */

 	if (s->ctx) SSL_CTX_free(s->ctx);

 	if (s->client_CA != NULL)

 		sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);

 	if (s->method != NULL) s->method->ssl_free(s);

 #ifndef	OPENSSL_NO_KRB5

 	if (s->kssl_ctx != NULL)

 		kssl_ctx_free(s->kssl_ctx);

 #endif	/* OPENSSL_NO_KRB5 */

 	OPENSSL_free(s);

 	}

 EXPORT_C void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)

 	{

 	/* If the output buffering BIO is still in place, remove it

 	 */

 	if (s->bbio != NULL)

 		{

 		if (s->wbio == s->bbio)

 			{

 			s->wbio=s->wbio->next_bio;

 			s->bbio->next_bio=NULL;

 			}

 		}

 	if ((s->rbio != NULL) && (s->rbio != rbio))

 		BIO_free_all(s->rbio);

 	if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))

 		BIO_free_all(s->wbio);

 	s->rbio=rbio;

 	s->wbio=wbio;

 	}

 EXPORT_C BIO *SSL_get_rbio(const SSL *s)

 	{ return(s->rbio); }

 EXPORT_C BIO *SSL_get_wbio(const SSL *s)

 	{ return(s->wbio); }

 EXPORT_C int SSL_get_fd(const SSL *s)

 	{

 	return(SSL_get_rfd(s));

 	}

 EXPORT_C int SSL_get_rfd(const SSL *s)

 	{

 	int ret= -1;

 	BIO *b,*r;

 	b=SSL_get_rbio(s);

 	r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);

 	if (r != NULL)

 		BIO_get_fd(r,&ret);

 	return(ret);

 	}

 EXPORT_C int SSL_get_wfd(const SSL *s)

 	{

 	int ret= -1;

 	BIO *b,*r;

 	b=SSL_get_wbio(s);

 	r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);

 	if (r != NULL)

 		BIO_get_fd(r,&ret);

 	return(ret);

 	}

 #ifndef OPENSSL_NO_SOCK

 EXPORT_C int SSL_set_fd(SSL *s,int fd)

 	{

 	int ret=0;

 	BIO *bio=NULL;

 	bio=BIO_new(BIO_s_socket());

 	if (bio == NULL)

 		{

 		SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);

 		goto err;

 		}

 	BIO_set_fd(bio,fd,BIO_NOCLOSE);

 	SSL_set_bio(s,bio,bio);

 	ret=1;

 err:

 	return(ret);

 	}

 EXPORT_C int SSL_set_wfd(SSL *s,int fd)

 	{

 	int ret=0;

 	BIO *bio=NULL;

 	if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)

 		|| ((int)BIO_get_fd(s->rbio,NULL) != fd))

 		{

 		bio=BIO_new(BIO_s_socket());

 		if (bio == NULL)

 			{ SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }

 		BIO_set_fd(bio,fd,BIO_NOCLOSE);

 		SSL_set_bio(s,SSL_get_rbio(s),bio);

 		}

 	else

 		SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));

 	ret=1;

 err:

 	return(ret);

 	}

 EXPORT_C int SSL_set_rfd(SSL *s,int fd)

 	{

 	int ret=0;

 	BIO *bio=NULL;

 	if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)

 		|| ((int)BIO_get_fd(s->wbio,NULL) != fd))

 		{

 		bio=BIO_new(BIO_s_socket());

 		if (bio == NULL)

 			{

 			SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);

 			goto err;

 			}

 		BIO_set_fd(bio,fd,BIO_NOCLOSE);

 		SSL_set_bio(s,bio,SSL_get_wbio(s));

 		}

 	else

 		SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));

 	ret=1;

 err:

 	return(ret);

 	}

 #endif

 /* return length of latest Finished message we sent, copy to 'buf' */

 EXPORT_C size_t SSL_get_finished(const SSL *s, void *buf, size_t count)

 	{

 	size_t ret = 0;

 	if (s->s3 != NULL)

 		{

 		ret = s->s3->tmp.finish_md_len;

 		if (count > ret)

 			count = ret;

 		memcpy(buf, s->s3->tmp.finish_md, count);

 		}

 	return ret;

 	}

 /* return length of latest Finished message we expected, copy to 'buf' */

 EXPORT_C size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)

 	{

 	size_t ret = 0;

 	if (s->s3 != NULL)

 		{

 		ret = s->s3->tmp.peer_finish_md_len;

 		if (count > ret)

 			count = ret;

 		memcpy(buf, s->s3->tmp.peer_finish_md, count);

 		}

 	return ret;

 	}

 EXPORT_C int SSL_get_verify_mode(const SSL *s)

 	{

 	return(s->verify_mode);

 	}

 EXPORT_C int SSL_get_verify_depth(const SSL *s)

 	{

 	return X509_VERIFY_PARAM_get_depth(s->param);

 	}

 EXPORT_C int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)

 	{

 	return(s->verify_callback);

 	}

 EXPORT_C int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)

 	{

 	return(ctx->verify_mode);

 	}

 EXPORT_C int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)

 	{

 	return X509_VERIFY_PARAM_get_depth(ctx->param);

 	}

 EXPORT_C int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)

 	{

 	return(ctx->default_verify_callback);

 	}

 EXPORT_C void SSL_set_verify(SSL *s,int mode,

 		    int (*callback)(int ok,X509_STORE_CTX *ctx))

 	{

 	s->verify_mode=mode;

 	if (callback != NULL)

 		s->verify_callback=callback;

 	}

 EXPORT_C void SSL_set_verify_depth(SSL *s,int depth)

 	{

 	X509_VERIFY_PARAM_set_depth(s->param, depth);

 	}

 EXPORT_C void SSL_set_read_ahead(SSL *s,int yes)

 	{

 	s->read_ahead=yes;

 	}

 EXPORT_C int SSL_get_read_ahead(const SSL *s)

 	{

 	return(s->read_ahead);

 	}

 EXPORT_C int SSL_pending(const SSL *s)

 	{

 	/* SSL_pending cannot work properly if read-ahead is enabled

 	 * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),

 	 * and it is impossible to fix since SSL_pending cannot report

 	 * errors that may be observed while scanning the new data.

 	 * (Note that SSL_pending() is often used as a boolean value,

 	 * so we'd better not return -1.)

 	 */

 	return(s->method->ssl_pending(s));

 	}

 EXPORT_C X509 *SSL_get_peer_certificate(const SSL *s)

 	{

 	X509 *r;

 	if ((s == NULL) || (s->session == NULL))

 		r=NULL;

 	else

 		r=s->session->peer;

 	if (r == NULL) return(r);

 	CRYPTO_add(&r->references,1,CRYPTO_LOCK_X509);

 	return(r);

 	}

 EXPORT_C STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)

 	{

 	STACK_OF(X509) *r;

 	if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))

 		r=NULL;

 	else

 		r=s->session->sess_cert->cert_chain;

 	/* If we are a client, cert_chain includes the peer's own

 	 * certificate; if we are a server, it does not. */

 	return(r);

 	}

 /* Now in theory, since the calling process own 't' it should be safe to

  * modify.  We need to be able to read f without being hassled */

 EXPORT_C void SSL_copy_session_id(SSL *t,const SSL *f)

 	{

 	CERT *tmp;

 	/* Do we need to to SSL locking? */

 	SSL_set_session(t,SSL_get_session(f));

 	/* what if we are setup as SSLv2 but want to talk SSLv3 or

 	 * vice-versa */

 	if (t->method != f->method)

 		{

 		t->method->ssl_free(t);	/* cleanup current */

 		t->method=f->method;	/* change method */

 		t->method->ssl_new(t);	/* setup new */

 		}

 	tmp=t->cert;

 	if (f->cert != NULL)

 		{

 		CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);

 		t->cert=f->cert;

 		}

 	else

 		t->cert=NULL;

 	if (tmp != NULL) ssl_cert_free(tmp);

 	SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);

 	}

 /* Fix this so it checks all the valid key/cert options */

 EXPORT_C int SSL_CTX_check_private_key(const SSL_CTX *ctx)

 	{

 	if (	(ctx == NULL) ||

 		(ctx->cert == NULL) ||

 		(ctx->cert->key->x509 == NULL))

 		{

 		SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);

 		return(0);

 		}

 	if 	(ctx->cert->key->privatekey == NULL)

 		{

 		SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);

 		return(0);

 		}

 	return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));

 	}

 /* Fix this function so that it takes an optional type parameter */

 EXPORT_C int SSL_check_private_key(const SSL *ssl)

 	{

 	if (ssl == NULL)

 		{

 		SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);

 		return(0);

 		}

 	if (ssl->cert == NULL)

 		{

                 SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);

 		return 0;

 		}

 	if (ssl->cert->key->x509 == NULL)

 		{

 		SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);

 		return(0);

 		}

 	if (ssl->cert->key->privatekey == NULL)

 		{

 		SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);

 		return(0);

 		}

 	return(X509_check_private_key(ssl->cert->key->x509,

 		ssl->cert->key->privatekey));

 	}

 EXPORT_C int SSL_accept(SSL *s)

 	{

 	if (s->handshake_func == 0)

 		/* Not properly initialized yet */

 		SSL_set_accept_state(s);

 	return(s->method->ssl_accept(s));

 	}

 EXPORT_C int SSL_connect(SSL *s)

 	{

 	if (s->handshake_func == 0)

 		/* Not properly initialized yet */

 		SSL_set_connect_state(s);

 	return(s->method->ssl_connect(s));

 	}

 EXPORT_C long SSL_get_default_timeout(const SSL *s)

 	{

 	return(s->method->get_timeout());

 	}

 EXPORT_C int SSL_read(SSL *s,void *buf,int num)

 	{

 	if (s->handshake_func == 0)

 		{

 		SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);

 		return -1;

 		}

 	if (s->shutdown & SSL_RECEIVED_SHUTDOWN)

 		{

 		s->rwstate=SSL_NOTHING;

 		return(0);

 		}

 	return(s->method->ssl_read(s,buf,num));

 	}

 EXPORT_C int SSL_peek(SSL *s,void *buf,int num)

 	{

 	if (s->handshake_func == 0)

 		{

 		SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);

 		return -1;

 		}

 	if (s->shutdown & SSL_RECEIVED_SHUTDOWN)

 		{

 		return(0);

 		}

 	return(s->method->ssl_peek(s,buf,num));

 	}

 EXPORT_C int SSL_write(SSL *s,const void *buf,int num)

 	{

 	if (s->handshake_func == 0)

 		{

 		SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);

 		return -1;

 		}

 	if (s->shutdown & SSL_SENT_SHUTDOWN)

 		{

 		s->rwstate=SSL_NOTHING;

 		SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);

 		return(-1);

 		}

 	return(s->method->ssl_write(s,buf,num));

 	}

 EXPORT_C int SSL_shutdown(SSL *s)

 	{

 	/* Note that this function behaves differently from what one might

 	 * expect.  Return values are 0 for no success (yet),

 	 * 1 for success; but calling it once is usually not enough,

 	 * even if blocking I/O is used (see ssl3_shutdown).

 	 */

 	if (s->handshake_func == 0)

 		{

 		SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);

 		return -1;

 		}

 	if ((s != NULL) && !SSL_in_init(s))

 		return(s->method->ssl_shutdown(s));

 	else

 		return(1);

 	}

 EXPORT_C int SSL_renegotiate(SSL *s)

 	{

 	if (s->new_session == 0)

 		{

 		s->new_session=1;

 		}

 	return(s->method->ssl_renegotiate(s));

 	}

 EXPORT_C int SSL_renegotiate_pending(SSL *s)

 	{

 	/* becomes true when negotiation is requested;

 	 * false again once a handshake has finished */

 	return (s->new_session != 0);

 	}

 EXPORT_C long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)

 	{

 	long l;

 	switch (cmd)

 		{

 	case SSL_CTRL_GET_READ_AHEAD:

 		return(s->read_ahead);

 	case SSL_CTRL_SET_READ_AHEAD:

 		l=s->read_ahead;

 		s->read_ahead=larg;

 		return(l);

 	case SSL_CTRL_SET_MSG_CALLBACK_ARG:

 		s->msg_callback_arg = parg;

 		return 1;

 	case SSL_CTRL_OPTIONS:

 		return(s->options|=larg);

 	case SSL_CTRL_MODE:

 		return(s->mode|=larg);

 	case SSL_CTRL_GET_MAX_CERT_LIST:

 		return(s->max_cert_list);

 	case SSL_CTRL_SET_MAX_CERT_LIST:

 		l=s->max_cert_list;

 		s->max_cert_list=larg;

 		return(l);

 	case SSL_CTRL_SET_MTU:

 		if (SSL_version(s) == DTLS1_VERSION)

 			{

 			s->d1->mtu = larg;

 			return larg;

 			}

 		return 0;

 	default:

 		return(s->method->ssl_ctrl(s,cmd,larg,parg));

 		}

 	}

 EXPORT_C long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))

 	{

 	switch(cmd)

 		{

 	case SSL_CTRL_SET_MSG_CALLBACK:

 		s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);

 		return 1;

 	default:

 		return(s->method->ssl_callback_ctrl(s,cmd,fp));

 		}

 	}

 EXPORT_C struct lhash_st *SSL_CTX_sessions(SSL_CTX *ctx)

 	{

 	return ctx->sessions;

 	}

 EXPORT_C long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)

 	{

 	long l;

 	switch (cmd)

 		{

 	case SSL_CTRL_GET_READ_AHEAD:

 		return(ctx->read_ahead);

 	case SSL_CTRL_SET_READ_AHEAD:

 		l=ctx->read_ahead;

 		ctx->read_ahead=larg;

 		return(l);

 	case SSL_CTRL_SET_MSG_CALLBACK_ARG:

 		ctx->msg_callback_arg = parg;

 		return 1;

 	case SSL_CTRL_GET_MAX_CERT_LIST:

 		return(ctx->max_cert_list);

 	case SSL_CTRL_SET_MAX_CERT_LIST:

 		l=ctx->max_cert_list;

 		ctx->max_cert_list=larg;

 		return(l);

 	case SSL_CTRL_SET_SESS_CACHE_SIZE:

 		l=ctx->session_cache_size;

 		ctx->session_cache_size=larg;

 		return(l);

 	case SSL_CTRL_GET_SESS_CACHE_SIZE:

 		return(ctx->session_cache_size);

 	case SSL_CTRL_SET_SESS_CACHE_MODE:

 		l=ctx->session_cache_mode;

 		ctx->session_cache_mode=larg;

 		return(l);

 	case SSL_CTRL_GET_SESS_CACHE_MODE:

 		return(ctx->session_cache_mode);

 	case SSL_CTRL_SESS_NUMBER:

 		return(ctx->sessions->num_items);

 	case SSL_CTRL_SESS_CONNECT:

 		return(ctx->stats.sess_connect);

 	case SSL_CTRL_SESS_CONNECT_GOOD:

 		return(ctx->stats.sess_connect_good);

 	case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:

 		return(ctx->stats.sess_connect_renegotiate);

 	case SSL_CTRL_SESS_ACCEPT:

 		return(ctx->stats.sess_accept);

 	case SSL_CTRL_SESS_ACCEPT_GOOD:

 		return(ctx->stats.sess_accept_good);

 	case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:

 		return(ctx->stats.sess_accept_renegotiate);

 	case SSL_CTRL_SESS_HIT:

 		return(ctx->stats.sess_hit);

 	case SSL_CTRL_SESS_CB_HIT:

 		return(ctx->stats.sess_cb_hit);

 	case SSL_CTRL_SESS_MISSES:

 		return(ctx->stats.sess_miss);

 	case SSL_CTRL_SESS_TIMEOUTS:

 		return(ctx->stats.sess_timeout);

 	case SSL_CTRL_SESS_CACHE_FULL:

 		return(ctx->stats.sess_cache_full);

 	case SSL_CTRL_OPTIONS:

 		return(ctx->options|=larg);

 	case SSL_CTRL_MODE:

 		return(ctx->mode|=larg);

 	default:

 		return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));

 		}

 	}

 EXPORT_C long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))

 	{

 	switch(cmd)

 		{

 	case SSL_CTRL_SET_MSG_CALLBACK:

 		ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);

 		return 1;

 	default:

 		return(ctx->method->ssl_ctx_callback_ctrl(ctx,cmd,fp));

 		}

 	}

 int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)

 	{

 	long l;

 	l=a->id-b->id;

 	if (l == 0L)

 		return(0);

 	else

 		return((l > 0)?1:-1);

 	}

 int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,

 			const SSL_CIPHER * const *bp)

 	{

 	long l;

 	l=(*ap)->id-(*bp)->id;

 	if (l == 0L)

 		return(0);

 	else

 		return((l > 0)?1:-1);

 	}

 /** return a STACK of the ciphers available for the SSL and in order of

  * preference */

 EXPORT_C STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s)

 	{

 	if (s != NULL)

 		{

 		if (s->cipher_list != NULL)

 			{

 			return(s->cipher_list);

 			}

 		else if ((s->ctx != NULL) &&

 			(s->ctx->cipher_list != NULL))

 			{

 			return(s->ctx->cipher_list);

 			}

 		}

 	return(NULL);

 	}

 /** return a STACK of the ciphers available for the SSL and in order of

  * algorithm id */

 STACK_OF(SSL_CIPHER) *ssl_get_ciphers_by_id(SSL *s)

 	{

 	if (s != NULL)

 		{

 		if (s->cipher_list_by_id != NULL)

 			{

 			return(s->cipher_list_by_id);

 			}

 		else if ((s->ctx != NULL) &&

 			(s->ctx->cipher_list_by_id != NULL))

 			{

 			return(s->ctx->cipher_list_by_id);

 			}

 		}

 	return(NULL);

 	}

 /** The old interface to get the same thing as SSL_get_ciphers() */

 EXPORT_C const char *SSL_get_cipher_list(const SSL *s,int n)

 	{

 	SSL_CIPHER *c;

 	STACK_OF(SSL_CIPHER) *sk;

 	if (s == NULL) return(NULL);

 	sk=SSL_get_ciphers(s);

 	if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= n))

 		return(NULL);

 	c=sk_SSL_CIPHER_value(sk,n);

 	if (c == NULL) return(NULL);

 	return(c->name);

 	}

 /** specify the ciphers to be used by default by the SSL_CTX */

 EXPORT_C int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)

 	{

 	STACK_OF(SSL_CIPHER) *sk;

 	sk=ssl_create_cipher_list(ctx->method,&ctx->cipher_list,

 		&ctx->cipher_list_by_id,str);

 	/* ssl_create_cipher_list may return an empty stack if it

 	 * was unable to find a cipher matching the given rule string

 	 * (for example if the rule string specifies a cipher which

 	 * has been disabled). This is not an error as far as 

 	 * ssl_create_cipher_list is concerned, and hence 

 	 * ctx->cipher_list and ctx->cipher_list_by_id has been

 	 * updated. */

 	if (sk == NULL)

 		return 0;

 	else if (sk_SSL_CIPHER_num(sk) == 0)

 		{

 		SSLerr(SSL_F_SSL_CTX_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);

 		return 0;

 		}

 	return 1;

 	}

 /** specify the ciphers to be used by the SSL */

 EXPORT_C int SSL_set_cipher_list(SSL *s,const char *str)

 	{

 	STACK_OF(SSL_CIPHER) *sk;

 	sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,

 		&s->cipher_list_by_id,str);

 	/* see comment in SSL_CTX_set_cipher_list */

 	if (sk == NULL)

 		return 0;

 	else if (sk_SSL_CIPHER_num(sk) == 0)

 		{

 		SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);

 		return 0;

 		}

 	return 1;

 	}

 /* works well for SSLv2, not so good for SSLv3 */

 EXPORT_C char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)

 	{

 	char *p;

 	STACK_OF(SSL_CIPHER) *sk;

 	SSL_CIPHER *c;

 	int i;

 	if ((s->session == NULL) || (s->session->ciphers == NULL) ||

 		(len < 2))

 		return(NULL);

 	p=buf;

 	sk=s->session->ciphers;

 	for (i=0; i<sk_SSL_CIPHER_num(sk); i++)

 		{

 		int n;

 		c=sk_SSL_CIPHER_value(sk,i);

 		n=strlen(c->name);

 		if (n+1 > len)

 			{

 			if (p != buf)

 				--p;

 			*p='\0';

 			return buf;

 			}

 		strcpy(p,c->name);

 		p+=n;

 		*(p++)=':';

 		len-=n+1;

 		}

 	p[-1]='\0';

 	return(buf);

 	}

 int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,

                              int (*put_cb)(const SSL_CIPHER *, unsigned char *))

 	{

 	int i,j=0;

 	SSL_CIPHER *c;

 	unsigned char *q;

 #ifndef OPENSSL_NO_KRB5

         int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);

 #endif /* OPENSSL_NO_KRB5 */

 	if (sk == NULL) return(0);

 	q=p;

 	for (i=0; i<sk_SSL_CIPHER_num(sk); i++)

 		{

 		c=sk_SSL_CIPHER_value(sk,i);

 #ifndef OPENSSL_NO_KRB5

                 if ((c->algorithms & SSL_KRB5) && nokrb5)

                     continue;

 #endif /* OPENSSL_NO_KRB5 */                    

 		j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);

 		p+=j;

 		}

 	return(p-q);

 	}

 STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,

 					       STACK_OF(SSL_CIPHER) **skp)

 	{

 	SSL_CIPHER *c;

 	STACK_OF(SSL_CIPHER) *sk;

 	int i,n;

 	n=ssl_put_cipher_by_char(s,NULL,NULL);

 	if ((num%n) != 0)

 		{

 		SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);

 		return(NULL);

 		}

 	if ((skp == NULL) || (*skp == NULL))

 		sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */

 	else

 		{

 		sk= *skp;

 		sk_SSL_CIPHER_zero(sk);

 		}

 	for (i=0; i<num; i+=n)

 		{

 		c=ssl_get_cipher_by_char(s,p);

 		p+=n;

 		if (c != NULL)

 			{

 			if (!sk_SSL_CIPHER_push(sk,c))

 				{

 				SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);

 				goto err;

 				}

 			}

 		}

 	if (skp != NULL)

 		*skp=sk;

 	return(sk);

 err:

 	if ((skp == NULL) || (*skp == NULL))

 		sk_SSL_CIPHER_free(sk);

 	return(NULL);

 	}

 EXPORT_C unsigned long SSL_SESSION_hash(const SSL_SESSION *a)

 	{

 	unsigned long l;

 	l=(unsigned long)

 		((unsigned int) a->session_id[0]     )|

 		((unsigned int) a->session_id[1]<< 8L)|

 		((unsigned long)a->session_id[2]<<16L)|

 		((unsigned long)a->session_id[3]<<24L);

 	return(l);

 	}

 /* NB: If this function (or indeed the hash function which uses a sort of

  * coarser function than this one) is changed, ensure

  * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being

  * able to construct an SSL_SESSION that will collide with any existing session

  * with a matching session ID. */

 EXPORT_C int SSL_SESSION_cmp(const SSL_SESSION *a,const SSL_SESSION *b)

 	{

 	if (a->ssl_version != b->ssl_version)

 		return(1);

 	if (a->session_id_length != b->session_id_length)

 		return(1);

 	return(memcmp(a->session_id,b->session_id,a->session_id_length));

 	}

 /* These wrapper functions should remain rather than redeclaring

  * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each

  * variable. The reason is that the functions aren't static, they're exposed via

  * ssl.h. */

 static IMPLEMENT_LHASH_HASH_FN(SSL_SESSION_hash, SSL_SESSION *)

 static IMPLEMENT_LHASH_COMP_FN(SSL_SESSION_cmp, SSL_SESSION *)

 EXPORT_C SSL_CTX *SSL_CTX_new(SSL_METHOD *meth)

 	{

 	SSL_CTX *ret=NULL;

 	if (meth == NULL)

 		{

 		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);

 		return(NULL);

 		}

 	if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)

 		{

 		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);

 		goto err;

 		}

 	ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));

 	if (ret == NULL)

 		goto err;

 	memset(ret,0,sizeof(SSL_CTX));

 	ret->method=meth;

 	ret->cert_store=NULL;

 	ret->session_cache_mode=SSL_SESS_CACHE_SERVER;

 	ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;

 	ret->session_cache_head=NULL;

 	ret->session_cache_tail=NULL;

 	/* We take the system default */

 	ret->session_timeout=meth->get_timeout();

 	ret->new_session_cb=0;

 	ret->remove_session_cb=0;

 	ret->get_session_cb=0;

 	ret->generate_session_id=0;

 	memset((char *)&ret->stats,0,sizeof(ret->stats));

 	ret->references=1;

 	ret->quiet_shutdown=0;

 /*	ret->cipher=NULL;*/

 /*	ret->s2->challenge=NULL;

 	ret->master_key=NULL;

 	ret->key_arg=NULL;

 	ret->s2->conn_id=NULL; */

 	ret->info_callback=NULL;

 	ret->app_verify_callback=0;

 	ret->app_verify_arg=NULL;

 	ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;

 	ret->read_ahead=0;

 	ret->msg_callback=0;

 	ret->msg_callback_arg=NULL;

 	ret->verify_mode=SSL_VERIFY_NONE;

 #if 0

 	ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */

 #endif

 	ret->sid_ctx_length=0;

 	ret->default_verify_callback=NULL;

 	if ((ret->cert=ssl_cert_new()) == NULL)

 		goto err;

 	ret->default_passwd_callback=0;

 	ret->default_passwd_callback_userdata=NULL;

 	ret->client_cert_cb=0;

 	ret->app_gen_cookie_cb=0;

 	ret->app_verify_cookie_cb=0;

 	ret->sessions=lh_new(LHASH_HASH_FN(SSL_SESSION_hash),

 			LHASH_COMP_FN(SSL_SESSION_cmp));

 	if (ret->sessions == NULL) goto err;

 	ret->cert_store=X509_STORE_new();

 	if (ret->cert_store == NULL) goto err;

 	ssl_create_cipher_list(ret->method,

 		&ret->cipher_list,&ret->cipher_list_by_id,

 		SSL_DEFAULT_CIPHER_LIST);

 	if (ret->cipher_list == NULL

 	    || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)

 		{

 		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);

 		goto err2;

 		}

 	ret->param = X509_VERIFY_PARAM_new();

 	if (!ret->param)

 		goto err;

 	if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)

 		{

 		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);

 		goto err2;

 		}

 	if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)

 		{

 		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);

 		goto err2;

 		}

 	if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)

 		{

 		SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);

 		goto err2;

 		}

 	if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)

 		goto err;

 	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data);

 	ret->extra_certs=NULL;

 	ret->comp_methods=SSL_COMP_get_compression_methods();

 	return(ret);

 err:

 	SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);

 err2:

 	if (ret != NULL) SSL_CTX_free(ret);

 	return(NULL);

 	}

 #if 0

 static void SSL_COMP_free(SSL_COMP *comp)

     { OPENSSL_free(comp); }

 #endif

 EXPORT_C void SSL_CTX_free(SSL_CTX *a)

 	{

 	int i;

 	if (a == NULL) return;

 	i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);

 #ifdef REF_PRINT

 	REF_PRINT("SSL_CTX",a);

 #endif

 	if (i > 0) return;

 #ifdef REF_CHECK

 	if (i < 0)

 		{

 		fprintf(stderr,"SSL_CTX_free, bad reference count\n");

 		abort(); /* ok */

 		}

 #endif

 	if (a->param)

 		X509_VERIFY_PARAM_free(a->param);

 	/*

 	 * Free internal session cache. However: the remove_cb() may reference

 	 * the ex_data of SSL_CTX, thus the ex_data store can only be removed

 	 * after the sessions were flushed.

 	 * As the ex_data handling routines might also touch the session cache,

 	 * the most secure solution seems to be: empty (flush) the cache, then

 	 * free ex_data, then finally free the cache.

 	 * (See ticket [openssl.org #212].)

 	 */

 	if (a->sessions != NULL)

 		SSL_CTX_flush_sessions(a,0);

 	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data);

 	if (a->sessions != NULL)

 		lh_free(a->sessions);

 	if (a->cert_store != NULL)

 		X509_STORE_free(a->cert_store);

 	if (a->cipher_list != NULL)

 		sk_SSL_CIPHER_free(a->cipher_list);

 	if (a->cipher_list_by_id != NULL)

 		sk_SSL_CIPHER_free(a->cipher_list_by_id);

 	if (a->cert != NULL)

 		ssl_cert_free(a->cert);

 	if (a->client_CA != NULL)

 		sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);

 	if (a->extra_certs != NULL)

 		sk_X509_pop_free(a->extra_certs,X509_free);

 #if 0 /* This should never be done, since it removes a global database */

 	if (a->comp_methods != NULL)

 		sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);

 #else

 	a->comp_methods = NULL;

 #endif

 	OPENSSL_free(a);

 	}

 EXPORT_C void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)

 	{

 	ctx->default_passwd_callback=cb;

 	}

 EXPORT_C void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)

 	{

 	ctx->default_passwd_callback_userdata=u;

 	}

 EXPORT_C void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)

 	{

 	ctx->app_verify_callback=cb;

 	ctx->app_verify_arg=arg;

 	}

 EXPORT_C void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))

 	{

 	ctx->verify_mode=mode;

 	ctx->default_verify_callback=cb;

 	}

 EXPORT_C void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)

 	{

 	X509_VERIFY_PARAM_set_depth(ctx->param, depth);

 	}

 void ssl_set_cert_masks(CERT *c, SSL_CIPHER *cipher)

 	{

 	CERT_PKEY *cpk;

 	int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;

 	int rsa_enc_export,dh_rsa_export,dh_dsa_export;

 	int rsa_tmp_export,dh_tmp_export,kl;

 	unsigned long mask,emask;

 	int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;

 #ifndef OPENSSL_NO_ECDH

 	int have_ecdh_tmp;

 #endif

 	X509 *x = NULL;

 	EVP_PKEY *ecc_pkey = NULL;

 	int signature_nid = 0;

 	if (c == NULL) return;

 	kl=SSL_C_EXPORT_PKEYLENGTH(cipher);

 #ifndef OPENSSL_NO_RSA

 	rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);

 	rsa_tmp_export=(c->rsa_tmp_cb != NULL ||

 		(rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));

 #else

 	rsa_tmp=rsa_tmp_export=0;

 #endif

 #ifndef OPENSSL_NO_DH

 	dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);

 	dh_tmp_export=(c->dh_tmp_cb != NULL ||

 		(dh_tmp && DH_size(c->dh_tmp)*8 <= kl));

 #else

 	dh_tmp=dh_tmp_export=0;

 #endif

 #ifndef OPENSSL_NO_ECDH

 	have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);

 #endif

 	cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);

 	rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);

 	rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);

 	cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);

 	rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);

 	cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);

 	dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);

 	cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);

 	dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);

 	dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);

 	cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);

 /* FIX THIS EAY EAY EAY */

 	dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);

 	dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);

 	cpk= &(c->pkeys[SSL_PKEY_ECC]);

 	have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);

 	mask=0;

 	emask=0;

 #ifdef CIPHER_DEBUG

 	printf("rt=%d rte=%d dht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",

 		rsa_tmp,rsa_tmp_export,dh_tmp,

 		rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);

 #endif

 	if (rsa_enc || (rsa_tmp && rsa_sign))

 		mask|=SSL_kRSA;

 	if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))

 		emask|=SSL_kRSA;

 #if 0

 	/* The match needs to be both kEDH and aRSA or aDSA, so don't worry */

 	if (	(dh_tmp || dh_rsa || dh_dsa) && 

 		(rsa_enc || rsa_sign || dsa_sign))

 		mask|=SSL_kEDH;

 	if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&

 		(rsa_enc || rsa_sign || dsa_sign))

 		emask|=SSL_kEDH;

 #endif

 	if (dh_tmp_export) 

 		emask|=SSL_kEDH;

 	if (dh_tmp)

 		mask|=SSL_kEDH;

 	if (dh_rsa) mask|=SSL_kDHr;

 	if (dh_rsa_export) emask|=SSL_kDHr;

 	if (dh_dsa) mask|=SSL_kDHd;

 	if (dh_dsa_export) emask|=SSL_kDHd;

 	if (rsa_enc || rsa_sign)

 		{

 		mask|=SSL_aRSA;

 		emask|=SSL_aRSA;

 		}

 	if (dsa_sign)

 		{

 		mask|=SSL_aDSS;

 		emask|=SSL_aDSS;

 		}

 	mask|=SSL_aNULL;

 	emask|=SSL_aNULL;

 #ifndef OPENSSL_NO_KRB5

 	mask|=SSL_kKRB5|SSL_aKRB5;

 	emask|=SSL_kKRB5|SSL_aKRB5;

 #endif

 	/* An ECC certificate may be usable for ECDH and/or

 	 * ECDSA cipher suites depending on the key usage extension.

 	 */

 	if (have_ecc_cert)

 		{

                 /* This call populates extension flags (ex_flags) */

 		x = (c->pkeys[SSL_PKEY_ECC]).x509;

 		X509_check_purpose(x, -1, 0);

 		ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?

 		    (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;

 		ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?

 		    (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;

 		ecc_pkey = X509_get_pubkey(x);

 		ecc_pkey_size = (ecc_pkey != NULL) ? 

 		    EVP_PKEY_bits(ecc_pkey) : 0;

 		EVP_PKEY_free(ecc_pkey);

 		if ((x->sig_alg) && (x->sig_alg->algorithm))

 			signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);

 #ifndef OPENSSL_NO_ECDH

 		if (ecdh_ok)

 			{

 			if ((signature_nid == NID_md5WithRSAEncryption) ||

 			    (signature_nid == NID_md4WithRSAEncryption) ||

 			    (signature_nid == NID_md2WithRSAEncryption))

 				{

 				mask|=SSL_kECDH|SSL_aRSA;

 				if (ecc_pkey_size <= 163)

 					emask|=SSL_kECDH|SSL_aRSA;

 				}

 			if (signature_nid == NID_ecdsa_with_SHA1)

 				{

 				mask|=SSL_kECDH|SSL_aECDSA;

 				if (ecc_pkey_size <= 163)

 					emask|=SSL_kECDH|SSL_aECDSA;

 				}

 			}

 #endif

 #ifndef OPENSSL_NO_ECDSA

 		if (ecdsa_ok)

 			{

 			mask|=SSL_aECDSA;

 			emask|=SSL_aECDSA;

 			}

 #endif

 		}

 #ifndef OPENSSL_NO_ECDH

 	if (have_ecdh_tmp)

 		{

 		mask|=SSL_kECDHE;

 		emask|=SSL_kECDHE;

 		}

 #endif

 	c->mask=mask;

 	c->export_mask=emask;

 	c->valid=1;

 	}

 /* This handy macro borrowed from crypto/x509v3/v3_purp.c */

 #define ku_reject(x, usage) \

 	(((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))

 int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs)

 	{

 	unsigned long alg = cs->algorithms;

 	EVP_PKEY *pkey = NULL;

 	int keysize = 0;

 	int signature_nid = 0;

 	if (SSL_C_IS_EXPORT(cs))

 		{

 		/* ECDH key length in export ciphers must be <= 163 bits */

 		pkey = X509_get_pubkey(x);

 		if (pkey == NULL) return 0;

 		keysize = EVP_PKEY_bits(pkey);

 		EVP_PKEY_free(pkey);

 		if (keysize > 163) return 0;

 		}

 	/* This call populates the ex_flags field correctly */

 	X509_check_purpose(x, -1, 0);

 	if ((x->sig_alg) && (x->sig_alg->algorithm))

 		signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);

 	if (alg & SSL_kECDH) 

 		{

 		/* key usage, if present, must allow key agreement */

 		if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))

 			{

 			return 0;

 			}

 		if (alg & SSL_aECDSA) 

 			{

 			/* signature alg must be ECDSA */

 			if (signature_nid != NID_ecdsa_with_SHA1)

 				{

 				return 0;

 				}

 			}

 		if (alg & SSL_aRSA)

 			{

 			/* signature alg must be RSA */

 			if ((signature_nid != NID_md5WithRSAEncryption) &&

 			    (signature_nid != NID_md4WithRSAEncryption) &&

 			    (signature_nid != NID_md2WithRSAEncryption))

 				{

 				return 0;

 				}

 			}

 		} 

 	else if (alg & SSL_aECDSA)

 		{

 		/* key usage, if present, must allow signing */

 		if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))

 			{

 			return 0;

 			}

 		}

 	return 1;  /* all checks are ok */

 	}

 /* THIS NEEDS CLEANING UP */

 X509 *ssl_get_server_send_cert(SSL *s)

 	{

 	unsigned long alg,mask,kalg;

 	CERT *c;

 	int i,is_export;

 	c=s->cert;

 	ssl_set_cert_masks(c, s->s3->tmp.new_cipher);

 	alg=s->s3->tmp.new_cipher->algorithms;

 	is_export=SSL_C_IS_EXPORT(s->s3->tmp.new_cipher);

 	mask=is_export?c->export_mask:c->mask;

 	kalg=alg&(SSL_MKEY_MASK|SSL_AUTH_MASK);

 	if (kalg & SSL_kECDH)

 		{

 		/* we don't need to look at SSL_kECDHE 

 		 * since no certificate is needed for

 		 * anon ECDH and for authenticated

 		 * ECDHE, the check for the auth 

 		 * algorithm will set i correctly

 		 * NOTE: For ECDH-RSA, we need an ECC

 		 * not an RSA cert but for ECDHE-RSA

 		 * we need an RSA cert. Placing the

 		 * checks for SSL_kECDH before RSA

 		 * checks ensures the correct cert is chosen.

 		 */

 		i=SSL_PKEY_ECC;

 		}

 	else if (kalg & SSL_aECDSA)

 		{

 		i=SSL_PKEY_ECC;

 		}

 	else if (kalg & SSL_kDHr)

 		i=SSL_PKEY_DH_RSA;

 	else if (kalg & SSL_kDHd)

 		i=SSL_PKEY_DH_DSA;

 	else if (kalg & SSL_aDSS)

 		i=SSL_PKEY_DSA_SIGN;

 	else if (kalg & SSL_aRSA)

 		{

 		if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)

 			i=SSL_PKEY_RSA_SIGN;

 		else

 			i=SSL_PKEY_RSA_ENC;

 		}

 	else if (kalg & SSL_aKRB5)

 		{

 		/* VRS something else here? */

 		return(NULL);

 		}

 	else /* if (kalg & SSL_aNULL) */

 		{

 		SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);

 		return(NULL);

 		}

 	if (c->pkeys[i].x509 == NULL) return(NULL);

 	return(c->pkeys[i].x509);

 	}

 EVP_PKEY *ssl_get_sign_pkey(SSL *s,SSL_CIPHER *cipher)

 	{

 	unsigned long alg;

 	CERT *c;

 	alg=cipher->algorithms;

 	c=s->cert;

 	if ((alg & SSL_aDSS) &&

 		(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))

 		return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);

 	else if (alg & SSL_aRSA)

 		{

 		if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)

 			return(c->pkeys[SSL_PKEY_RSA_SIGN].privatekey);

 		else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)

 			return(c->pkeys[SSL_PKEY_RSA_ENC].privatekey);

 		else

 			return(NULL);

 		}

 	else if ((alg & SSL_aECDSA) &&

 	         (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))

 		return(c->pkeys[SSL_PKEY_ECC].privatekey);

 	else /* if (alg & SSL_aNULL) */

 		{

 		SSLerr(SSL_F_SSL_GET_SIGN_PKEY,ERR_R_INTERNAL_ERROR);

 		return(NULL);

 		}

 	}

 void ssl_update_cache(SSL *s,int mode)

 	{

 	int i;

 	/* If the session_id_length is 0, we are not supposed to cache it,

 	 * and it would be rather hard to do anyway :-) */

 	if (s->session->session_id_length == 0) return;

 	i=s->ctx->session_cache_mode;

 	if ((i & mode) && (!s->hit)

 		&& ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)

 		    || SSL_CTX_add_session(s->ctx,s->session))

 		&& (s->ctx->new_session_cb != NULL))

 		{

 		CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);

 		if (!s->ctx->new_session_cb(s,s->session))

 			SSL_SESSION_free(s->session);

 		}

 	/* auto flush every 255 connections */

 	if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&

 		((i & mode) == mode))

 		{

 		if (  (((mode & SSL_SESS_CACHE_CLIENT)

 			?s->ctx->stats.sess_connect_good

 			:s->ctx->stats.sess_accept_good) & 0xff) == 0xff)

 			{

 			SSL_CTX_flush_sessions(s->ctx,(unsigned long)time(NULL));

 			}

 		}

 	}

 EXPORT_C SSL_METHOD *SSL_get_ssl_method(SSL *s)

 	{

 	return(s->method);

 	}

 EXPORT_C int SSL_set_ssl_method(SSL *s,SSL_METHOD *meth)

 	{

 	int conn= -1;

 	int ret=1;

 	if (s->method != meth)

 		{

 		if (s->handshake_func != NULL)

 			conn=(s->handshake_func == s->method->ssl_connect);

 		if (s->method->version == meth->version)

 			s->method=meth;

 		else

 			{

 			s->method->ssl_free(s);

 			s->method=meth;

 			ret=s->method->ssl_new(s);

 			}

 		if (conn == 1)

 			s->handshake_func=meth->ssl_connect;

 		else if (conn == 0)

 			s->handshake_func=meth->ssl_accept;

 		}

 	return(ret);

 	}

 EXPORT_C int SSL_get_error(const SSL *s,int i)

 	{

 	int reason;

 	unsigned long l;

 	BIO *bio;

 	if (i > 0) return(SSL_ERROR_NONE);

 	/* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake

 	 * etc, where we do encode the error */

 	if ((l=ERR_peek_error()) != 0)

 		{

 		if (ERR_GET_LIB(l) == ERR_LIB_SYS)

 			return(SSL_ERROR_SYSCALL);

 		else

 			return(SSL_ERROR_SSL);

 		}

 	if ((i < 0) && SSL_want_read(s))

 		{

 		bio=SSL_get_rbio(s);

 		if (BIO_should_read(bio))

 			return(SSL_ERROR_WANT_READ);

 		else if (BIO_should_write(bio))

 			/* This one doesn't make too much sense ... We never try

 			 * to write to the rbio, and an application program where

 			 * rbio and wbio are separate couldn't even know what it

 			 * should wait for.

 			 * However if we ever set s->rwstate incorrectly

 			 * (so that we have SSL_want_read(s) instead of

 			 * SSL_want_write(s)) and rbio and wbio *are* the same,

 			 * this test works around that bug; so it might be safer

 			 * to keep it. */

 			return(SSL_ERROR_WANT_WRITE);

 		else if (BIO_should_io_special(bio))

 			{

 			reason=BIO_get_retry_reason(bio);

 			if (reason == BIO_RR_CONNECT)

 				return(SSL_ERROR_WANT_CONNECT);

 			else if (reason == BIO_RR_ACCEPT)

 				return(SSL_ERROR_WANT_ACCEPT);

 			else

 				return(SSL_ERROR_SYSCALL); /* unknown */

 			}

 		}

 	if ((i < 0) && SSL_want_write(s))

 		{

 		bio=SSL_get_wbio(s);

 		if (BIO_should_write(bio))

 			return(SSL_ERROR_WANT_WRITE);

 		else if (BIO_should_read(bio))

 			/* See above (SSL_want_read(s) with BIO_should_write(bio)) */

 			return(SSL_ERROR_WANT_READ);

 		else if (BIO_should_io_special(bio))

 			{

 			reason=BIO_get_retry_reason(bio);

 			if (reason == BIO_RR_CONNECT)

 				return(SSL_ERROR_WANT_CONNECT);

 			else if (reason == BIO_RR_ACCEPT)

 				return(SSL_ERROR_WANT_ACCEPT);

 			else

 				return(SSL_ERROR_SYSCALL);

 			}

 		}

 	if ((i < 0) && SSL_want_x509_lookup(s))

 		{

 		return(SSL_ERROR_WANT_X509_LOOKUP);

 		}

 	if (i == 0)

 		{

 		if (s->version == SSL2_VERSION)

 			{

 			/* assume it is the socket being closed */

 			return(SSL_ERROR_ZERO_RETURN);

 			}

 		else

 			{

 			if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&

 				(s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))

 				return(SSL_ERROR_ZERO_RETURN);

 			}

 		}

 	return(SSL_ERROR_SYSCALL);

 	}

 EXPORT_C int SSL_do_handshake(SSL *s)

 	{

 	int ret=1;

 	if (s->handshake_func == NULL)

 		{

 		SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);

 		return(-1);

 		}

 	s->method->ssl_renegotiate_check(s);

 	if (SSL_in_init(s) || SSL_in_before(s))

 		{

 		ret=s->handshake_func(s);

 		}

 	return(ret);

 	}

 /* For the next 2 functions, SSL_clear() sets shutdown and so

  * one of these calls will reset it */

 EXPORT_C void SSL_set_accept_state(SSL *s)

 	{

 	s->server=1;

 	s->shutdown=0;

 	s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;

 	s->handshake_func=s->method->ssl_accept;

 	/* clear the current cipher */

 	ssl_clear_cipher_ctx(s);

 	}

 EXPORT_C void SSL_set_connect_state(SSL *s)

 	{

 	s->server=0;

 	s->shutdown=0;

 	s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;

 	s->handshake_func=s->method->ssl_connect;

 	/* clear the current cipher */

 	ssl_clear_cipher_ctx(s);

 	}

 int ssl_undefined_function(SSL *s)

 	{

 	SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);

 	return(0);

 	}

 int ssl_undefined_void_function(void)

 	{

 	SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);

 	return(0);

 	}

 int ssl_undefined_const_function(const SSL *s)

 	{

 	SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);

 	return(0);

 	}

 SSL_METHOD *ssl_bad_method(int ver)

 	{

 	SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);

 	return(NULL);

 	}

 EXPORT_C const char *SSL_get_version(const SSL *s)

 	{

 	if (s->version == TLS1_VERSION)

 		return("TLSv1");

 	else if (s->version == SSL3_VERSION)

 		return("SSLv3");

 	else if (s->version == SSL2_VERSION)

 		return("SSLv2");

 	else

 		return("unknown");

 	}

 EXPORT_C SSL *SSL_dup(SSL *s)

 	{

 	STACK_OF(X509_NAME) *sk;

 	X509_NAME *xn;

 	SSL *ret;

 	int i;

 	if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)

 	    return(NULL);

 	ret->version = s->version;

 	ret->type = s->type;

 	ret->method = s->method;

 	if (s->session != NULL)

 		{

 		/* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */

 		SSL_copy_session_id(ret,s);

 		}

 	else

 		{

 		/* No session has been established yet, so we have to expect

 		 * that s->cert or ret->cert will be changed later --

 		 * they should not both point to the same object,

 		 * and thus we can't use SSL_copy_session_id. */

 		ret->method->ssl_free(ret);

 		ret->method = s->method;

 		ret->method->ssl_new(ret);

 		if (s->cert != NULL)

 			{

 			if (ret->cert != NULL)

 				{

 				ssl_cert_free(ret->cert);

 				}

 			ret->cert = ssl_cert_dup(s->cert);

 			if (ret->cert == NULL)

 				goto err;

 			}

 		SSL_set_session_id_context(ret,

 			s->sid_ctx, s->sid_ctx_length);

 		}

 	ret->options=s->options;

 	ret->mode=s->mode;

 	SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));

 	SSL_set_read_ahead(ret,SSL_get_read_ahead(s));

 	ret->msg_callback = s->msg_callback;

 	ret->msg_callback_arg = s->msg_callback_arg;

 	SSL_set_verify(ret,SSL_get_verify_mode(s),

 		SSL_get_verify_callback(s));

 	SSL_set_verify_depth(ret,SSL_get_verify_depth(s));

 	ret->generate_session_id = s->generate_session_id;

 	SSL_set_info_callback(ret,SSL_get_info_callback(s));

 	ret->debug=s->debug;

 	/* copy app data, a little dangerous perhaps */

 	if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))

 		goto err;

 	/* setup rbio, and wbio */

 	if (s->rbio != NULL)

 		{

 		if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))

 			goto err;

 		}

 	if (s->wbio != NULL)

 		{

 		if (s->wbio != s->rbio)

 			{

 			if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))

 				goto err;

 			}

 		else

 			ret->wbio=ret->rbio;

 		}

 	ret->rwstate = s->rwstate;

 	ret->in_handshake = s->in_handshake;

 	ret->handshake_func = s->handshake_func;

 	ret->server = s->server;

 	ret->new_session = s->new_session;

 	ret->quiet_shutdown = s->quiet_shutdown;

 	ret->shutdown=s->shutdown;

 	ret->state=s->state; /* SSL_dup does not really work at any state, though */

 	ret->rstate=s->rstate;

 	ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */

 	ret->hit=s->hit;

 	X509_VERIFY_PARAM_inherit(ret->param, s->param);

 	/* dup the cipher_list and cipher_list_by_id stacks */

 	if (s->cipher_list != NULL)

 		{

 		if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)

 			goto err;

 		}

 	if (s->cipher_list_by_id != NULL)

 		if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))

 			== NULL)

 			goto err;

 	/* Dup the client_CA list */

 	if (s->client_CA != NULL)

 		{

 		if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;

 		ret->client_CA=sk;

 		for (i=0; i<sk_X509_NAME_num(sk); i++)

 			{

 			xn=sk_X509_NAME_value(sk,i);

 			if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)

 				{

 				X509_NAME_free(xn);

 				goto err;

 				}

 			}

 		}

 	if (0)

 		{

 err:

 		if (ret != NULL) SSL_free(ret);

 		ret=NULL;

 		}

 	return(ret);

 	}

 void ssl_clear_cipher_ctx(SSL *s)

 	{

 	if (s->enc_read_ctx != NULL)

 		{

 		EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);

 		OPENSSL_free(s->enc_read_ctx);

 		s->enc_read_ctx=NULL;

 		}

 	if (s->enc_write_ctx != NULL)

 		{

 		EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);

 		OPENSSL_free(s->enc_write_ctx);

 		s->enc_write_ctx=NULL;

 		}

 #ifndef OPENSSL_NO_COMP

 	if (s->expand != NULL)

 		{

 		COMP_CTX_free(s->expand);

 		s->expand=NULL;

 		}

 	if (s->compress != NULL)

 		{

 		COMP_CTX_free(s->compress);

 		s->compress=NULL;

 		}

 #endif

 	}

 /* Fix this function so that it takes an optional type parameter */

 EXPORT_C X509 *SSL_get_certificate(const SSL *s)

 	{

 	if (s->cert != NULL)

 		return(s->cert->key->x509);

 	else

 		return(NULL);

 	}

 /* Fix this function so that it takes an optional type parameter */

 EXPORT_C EVP_PKEY *SSL_get_privatekey(SSL *s)

 	{

 	if (s->cert != NULL)

 		return(s->cert->key->privatekey);

 	else

 		return(NULL);

 	}

 EXPORT_C SSL_CIPHER *SSL_get_current_cipher(const SSL *s)

 	{

 	if ((s->session != NULL) && (s->session->cipher != NULL))

 		return(s->session->cipher);

 	return(NULL);

 	}

 #ifdef OPENSSL_NO_COMP

 EXPORT_C const void *SSL_get_current_compression(SSL *s)

 	{

 	return NULL;

 	}

 EXPORT_C const void *SSL_get_current_expansion(SSL *s)

 	{

 	return NULL;

 	}

 #else

 EXPORT_C const COMP_METHOD *SSL_get_current_compression(SSL *s)

 	{

 	if (s->compress != NULL)

 		return(s->compress->meth);

 	return(NULL);

 	}

 EXPORT_C const COMP_METHOD *SSL_get_current_expansion(SSL *s)

 	{

 	if (s->expand != NULL)

 		return(s->expand->meth);

 	return(NULL);

 	}

 #endif

 int ssl_init_wbio_buffer(SSL *s,int push)

 	{

 	BIO *bbio;

 	if (s->bbio == NULL)

 		{

 		bbio=BIO_new(BIO_f_buffer());

 		if (bbio == NULL) return(0);

 		s->bbio=bbio;

 		}

 	else

 		{

 		bbio=s->bbio;

 		if (s->bbio == s->wbio)

 			s->wbio=BIO_pop(s->wbio);

 		}

 	(void)BIO_reset(bbio);

 /*	if (!BIO_set_write_buffer_size(bbio,16*1024)) */

 	if (!BIO_set_read_buffer_size(bbio,1))

 		{

 		SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);

 		return(0);

 		}

 	if (push)

 		{

 		if (s->wbio != bbio)

 			s->wbio=BIO_push(bbio,s->wbio);

 		}

 	else

 		{

 		if (s->wbio == bbio)

 			s->wbio=BIO_pop(bbio);

 		}

 	return(1);

 	}

 void ssl_free_wbio_buffer(SSL *s)

 	{

 	if (s->bbio == NULL) return;

 	if (s->bbio == s->wbio)

 		{

 		/* remove buffering */

 		s->wbio=BIO_pop(s->wbio);

 #ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */

 		assert(s->wbio != NULL);

 #endif	

 	}

 	BIO_free(s->bbio);

 	s->bbio=NULL;

 	}

 EXPORT_C void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)

 	{

 	ctx->quiet_shutdown=mode;

 	}

 EXPORT_C int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)

 	{

 	return(ctx->quiet_shutdown);

 	}

 EXPORT_C void SSL_set_quiet_shutdown(SSL *s,int mode)

 	{

 	s->quiet_shutdown=mode;

 	}

 EXPORT_C int SSL_get_quiet_shutdown(const SSL *s)

 	{

 	return(s->quiet_shutdown);

 	}

 EXPORT_C void SSL_set_shutdown(SSL *s,int mode)

 	{

 	s->shutdown=mode;

 	}

 EXPORT_C int SSL_get_shutdown(const SSL *s)

 	{

 	return(s->shutdown);

 	}

 EXPORT_C int SSL_version(const SSL *s)

 	{

 	return(s->version);

 	}

 EXPORT_C SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)

 	{

 	return(ssl->ctx);

 	}

 EXPORT_C SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)

 	{

 	if (ssl->ctx == ctx)

 		return ssl->ctx;

 	if (ssl->cert != NULL)

 		ssl_cert_free(ssl->cert);

 	ssl->cert = ssl_cert_dup(ctx->cert);

 	CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);

 	if (ssl->ctx != NULL)

 		SSL_CTX_free(ssl->ctx); /* decrement reference count */

 	ssl->ctx = ctx;

 	return(ssl->ctx);

 	}

 #ifndef OPENSSL_NO_STDIO

 EXPORT_C int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)

 	{

 	return(X509_STORE_set_default_paths(ctx->cert_store));

 	}

 EXPORT_C int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,

 		const char *CApath)

 	{

 	return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));

 	}

 #endif

 EXPORT_C void SSL_set_info_callback(SSL *ssl,

 			   void (*cb)(const SSL *ssl,int type,int val))

 	{

 	ssl->info_callback=cb;

 	}

 /* One compiler (Diab DCC) doesn't like argument names in returned

    function pointer.  */

 EXPORT_C void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)

 	{

 	return ssl->info_callback;

 	}

 EXPORT_C int SSL_state(const SSL *ssl)

 	{

 	return(ssl->state);

 	}

 EXPORT_C void SSL_set_verify_result(SSL *ssl,long arg)

 	{

 	ssl->verify_result=arg;

 	}

 EXPORT_C long SSL_get_verify_result(const SSL *ssl)

 	{

 	return(ssl->verify_result);

 	}

 EXPORT_C int SSL_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,

 			 CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)

 	{

 	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp,

 				new_func, dup_func, free_func);

 	}

 EXPORT_C int SSL_set_ex_data(SSL *s,int idx,void *arg)

 	{

 	return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));

 	}

 EXPORT_C void *SSL_get_ex_data(const SSL *s,int idx)

 	{

 	return(CRYPTO_get_ex_data(&s->ex_data,idx));

 	}

 EXPORT_C int SSL_CTX_get_ex_new_index(long argl,void *argp,CRYPTO_EX_new *new_func,

 			     CRYPTO_EX_dup *dup_func,CRYPTO_EX_free *free_func)

 	{

 	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp,

 				new_func, dup_func, free_func);

 	}

 EXPORT_C int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)

 	{

 	return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));

 	}

 EXPORT_C void *SSL_CTX_get_ex_data(const SSL_CTX *s,int idx)

 	{

 	return(CRYPTO_get_ex_data(&s->ex_data,idx));

 	}

 int ssl_ok(SSL *s)

 	{

 	return(1);

 	}

 EXPORT_C X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)

 	{

 	return(ctx->cert_store);

 	}

 EXPORT_C void SSL_CTX_set_cert_store(SSL_CTX *ctx,X509_STORE *store)

 	{

 	if (ctx->cert_store != NULL)

 		X509_STORE_free(ctx->cert_store);

 	ctx->cert_store=store;

 	}

 EXPORT_C int SSL_want(const SSL *s)

 	{

 	return(s->rwstate);

 	}

 /*!

  * \brief Set the callback for generating temporary RSA keys.

  * \param ctx the SSL context.

  * \param cb the callback

  */

 #ifndef OPENSSL_NO_RSA

 EXPORT_C void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,

 							  int is_export,

 							  int keylength))

     {

     SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);

     }

 EXPORT_C void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,

 						  int is_export,

 						  int keylength))

     {

     SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);

     }

 #endif

 #ifdef DOXYGEN

 /*!

  * \brief The RSA temporary key callback function.

  * \param ssl the SSL session.

  * \param is_export \c TRUE if the temp RSA key is for an export ciphersuite.

  * \param keylength if \c is_export is \c TRUE, then \c keylength is the size

  * of the required key in bits.

  * \return the temporary RSA key.

  * \sa SSL_CTX_set_tmp_rsa_callback, SSL_set_tmp_rsa_callback

  */

 RSA *cb(SSL *ssl,int is_export,int keylength)

     {}

 #endif

 /*!

  * \brief Set the callback for generating temporary DH keys.

  * \param ctx the SSL context.

  * \param dh the callback

  */

 #ifndef OPENSSL_NO_DH

 EXPORT_C void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,

 							int keylength))

 	{

 	SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);

 	}

 EXPORT_C void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,

 						int keylength))

 	{

 	SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);

 	}

 #endif

 #ifndef OPENSSL_NO_ECDH

 EXPORT_C void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,

 							int keylength))

 	{

 	SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);

 	}

 EXPORT_C void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,

 						int keylength))

 	{

 	SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);

 	}

 #endif

 EXPORT_C void SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))

 	{

 	SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);

 	}

 EXPORT_C void SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))

 	{

 	SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);

 	}

 #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)

 #include "../crypto/bio/bss_file.c"

 #endif

 IMPLEMENT_STACK_OF(SSL_CIPHER)

 IMPLEMENT_STACK_OF(SSL_COMP)