text: /*! \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) 1998-2007 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.
   */
  /* ====================================================================
   * Copyright 2005 Nokia. All rights reserved.
   *
   * The portions of the attached software ("Contribution") is developed by
   * Nokia Corporation and is licensed pursuant to the OpenSSL open source
   * license.
   *
   * The Contribution, originally written by Mika Kousa and Pasi Eronen of
   * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
   * support (see RFC 4279) to OpenSSL.
   *
   * No patent licenses or other rights except those expressly stated in
   * the OpenSSL open source license shall be deemed granted or received
   * expressly, by implication, estoppel, or otherwise.
   *
   * No assurances are provided by Nokia that the Contribution does not
   * infringe the patent or other intellectual property rights of any third
   * party or that the license provides you with all the necessary rights
   * to make use of the Contribution.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
   * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
   * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
   * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
   * OTHERWISE.
   */
  
  #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>
  #include <openssl/rand.h>
  #include <openssl/ocsp.h>
  #ifndef OPENSSL_NO_DH
  #include <openssl/dh.h>
  #endif
  #ifndef OPENSSL_NO_ENGINE
  #include <openssl/engine.h>
  #endif
  
  const char *SSL_version_str=OPENSSL_VERSION_TEXT;
  
  SSL3_ENC_METHOD ssl3_undef_enc_method={
  	/* 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 *,  const char*, int, unsigned char *))ssl_undefined_function,
  	0,	/* finish_mac_length */
  	(int (*)(SSL *, int, 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
  	};
  
  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);
  	ssl_clear_hash_ctx(&s->read_hash);
  	ssl_clear_hash_ctx(&s->write_hash);
  
  	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 */
  int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const 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),
  		meth->version == SSL2_VERSION ? "SSLv2" : 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);
  	}
  
  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;
  	s->max_send_fragment = ctx->max_send_fragment;
  
  	CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
  	s->ctx=ctx;
  #ifndef OPENSSL_NO_TLSEXT
  	s->tlsext_debug_cb = 0;
  	s->tlsext_debug_arg = NULL;
  	s->tlsext_ticket_expected = 0;
  	s->tlsext_status_type = -1;
  	s->tlsext_status_expected = 0;
  	s->tlsext_ocsp_ids = NULL;
  	s->tlsext_ocsp_exts = NULL;
  	s->tlsext_ocsp_resp = NULL;
  	s->tlsext_ocsp_resplen = -1;
  	CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
  	s->initial_ctx=ctx;
  #endif
  
  	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);
  
  #ifndef OPENSSL_NO_PSK
  	s->psk_client_callback=ctx->psk_client_callback;
  	s->psk_server_callback=ctx->psk_server_callback;
  #endif
  
  	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);
  	}
  
  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;
      }
  
  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;
      }
  
  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;
  	}
  
  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;
  	}
  
  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 = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
  	CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
  	return (p != NULL);
  	}
  
  int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
  	{
  	return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
  	}
  
  int SSL_set_purpose(SSL *s, int purpose)
  	{
  	return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
  	}
  
  int SSL_CTX_set_trust(SSL_CTX *s, int trust)
  	{
  	return X509_VERIFY_PARAM_set_trust(s->param, trust);
  	}
  
  int SSL_set_trust(SSL *s, int trust)
  	{
  	return X509_VERIFY_PARAM_set_trust(s->param, trust);
  	}
  
  int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
  	{
  	return X509_VERIFY_PARAM_set1(ctx->param, vpm);
  	}
  
  int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
  	{
  	return X509_VERIFY_PARAM_set1(ssl->param, vpm);
  	}
  
  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);
  	ssl_clear_hash_ctx(&s->read_hash);
  	ssl_clear_hash_ctx(&s->write_hash);
  
  	if (s->cert != NULL) ssl_cert_free(s->cert);
  	/* Free up if allocated */
  
  #ifndef OPENSSL_NO_TLSEXT
  	if (s->tlsext_hostname)
  		OPENSSL_free(s->tlsext_hostname);
  	if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
  #ifndef OPENSSL_NO_EC
  	if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
  	if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
  #endif /* OPENSSL_NO_EC */
  	if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
  	if (s->tlsext_ocsp_exts)
  		sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
  						X509_EXTENSION_free);
  	if (s->tlsext_ocsp_ids)
  		sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
  	if (s->tlsext_ocsp_resp)
  		OPENSSL_free(s->tlsext_ocsp_resp);
  #endif
  
  	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);
  
  	if (s->ctx) SSL_CTX_free(s->ctx);
  
  #ifndef	OPENSSL_NO_KRB5
  	if (s->kssl_ctx != NULL)
  		kssl_ctx_free(s->kssl_ctx);
  #endif	/* OPENSSL_NO_KRB5 */
  
  	OPENSSL_free(s);
  	}
  
  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;
  	}
  
  BIO *SSL_get_rbio(const SSL *s)
  	{ return(s->rbio); }
  
  BIO *SSL_get_wbio(const SSL *s)
  	{ return(s->wbio); }
  
  int SSL_get_fd(const SSL *s)
  	{
  	return(SSL_get_rfd(s));
  	}
  
  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);
  	}
  
  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
  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);
  	}
  
  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);
  	}
  
  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' */
  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' */
  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;
  	}
  
  
  int SSL_get_verify_mode(const SSL *s)
  	{
  	return(s->verify_mode);
  	}
  
  int SSL_get_verify_depth(const SSL *s)
  	{
  	return X509_VERIFY_PARAM_get_depth(s->param);
  	}
  
  int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
  	{
  	return(s->verify_callback);
  	}
  
  int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
  	{
  	return(ctx->verify_mode);
  	}
  
  int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
  	{
  	return X509_VERIFY_PARAM_get_depth(ctx->param);
  	}
  
  int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
  	{
  	return(ctx->default_verify_callback);
  	}
  
  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;
  	}
  
  void SSL_set_verify_depth(SSL *s,int depth)
  	{
  	X509_VERIFY_PARAM_set_depth(s->param, depth);
  	}
  
  void SSL_set_read_ahead(SSL *s,int yes)
  	{
  	s->read_ahead=yes;
  	}
  
  int SSL_get_read_ahead(const SSL *s)
  	{
  	return(s->read_ahead);
  	}
  
  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));
  	}
  
  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);
  	}
  
  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 */
  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 */
  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 */
  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));
  	}
  
  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));
  	}
  
  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));
  	}
  
  long SSL_get_default_timeout(const SSL *s)
  	{
  	return(s->method->get_timeout());
  	}
  
  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));
  	}
  
  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));
  	}
  
  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));
  	}
  
  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);
  	}
  
  int SSL_renegotiate(SSL *s)
  	{
  	if (s->new_session == 0)
  		{
  		s->new_session=1;
  		}
  	return(s->method->ssl_renegotiate(s));
  	}
  
  int SSL_renegotiate_pending(SSL *s)
  	{
  	/* becomes true when negotiation is requested;
  	 * false again once a handshake has finished */
  	return (s->new_session != 0);
  	}
  
  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_CLEAR_OPTIONS:
  		return(s->options&=~larg);
  	case SSL_CTRL_MODE:
  		return(s->mode|=larg);
  	case SSL_CTRL_CLEAR_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:
  #ifndef OPENSSL_NO_DTLS1
  		if (larg < (long)dtls1_min_mtu())
  			return 0;
  #endif
  
  		if (SSL_version(s) == DTLS1_VERSION ||
  		    SSL_version(s) == DTLS1_BAD_VER)
  			{
  			s->d1->mtu = larg;
  			return larg;
  			}
  		return 0;
  	case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
  		if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
  			return 0;
  		s->max_send_fragment = larg;
  		return 1;
  	case SSL_CTRL_GET_RI_SUPPORT:
  		if (s->s3)
  			return s->s3->send_connection_binding;
  		else return 0;
  	default:
  		return(s->method->ssl_ctrl(s,cmd,larg,parg));
  		}
  	}
  
  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));
  		}
  	}
  
  LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
  	{
  	return ctx->sessions;
  	}
  
  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(lh_SSL_SESSION_num_items(ctx->sessions));
  	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_CLEAR_OPTIONS:
  		return(ctx->options&=~larg);
  	case SSL_CTRL_MODE:
  		return(ctx->mode|=larg);
  	case SSL_CTRL_CLEAR_MODE:
  		return(ctx->mode&=~larg);
  	case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
  		if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
  			return 0;
  		ctx->max_send_fragment = larg;
  		return 1;
  	default:
  		return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
  		}
  	}
  
  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 */
  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() */
  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 */
  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 */
  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 */
  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->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
  		    nokrb5)
  		    continue;
  #endif /* OPENSSL_NO_KRB5 */
  #ifndef OPENSSL_NO_PSK
  		/* with PSK there must be client callback set */
  		if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
  		    s->psk_client_callback == NULL)
  			continue;
  #endif /* OPENSSL_NO_PSK */
  		j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
  		p+=j;
  		}
  	/* If p == q, no ciphers and caller indicates an error. Otherwise
  	 * add SCSV if not renegotiating.
  	 */
  	if (p != q && !s->new_session)
  		{
  		static SSL_CIPHER scsv =
  			{
  			0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
  			};
  		j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
  		p+=j;
  #ifdef OPENSSL_RI_DEBUG
  		fprintf(stderr, "SCSV sent by client\n");
  #endif
  		}
  
  	return(p-q);
  	}
  
  STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
  					       STACK_OF(SSL_CIPHER) **skp)
  	{
  	const SSL_CIPHER *c;
  	STACK_OF(SSL_CIPHER) *sk;
  	int i,n;
  	if (s->s3)
  		s->s3->send_connection_binding = 0;
  
  	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)
  		{
  		/* Check for SCSV */
  		if (s->s3 && (n != 3 || !p[0]) &&
  			(p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
  			(p[n-1] == (SSL3_CK_SCSV & 0xff)))
  			{
  			/* SCSV fatal if renegotiating */
  			if (s->new_session)
  				{
  				SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
  				ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 
  				goto err;
  				}
  			s->s3->send_connection_binding = 1;
  			p += n;
  #ifdef OPENSSL_RI_DEBUG
  			fprintf(stderr, "SCSV received by server\n");
  #endif
  			continue;
  			}
  
  		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);
  	}
  
  
  #ifndef OPENSSL_NO_TLSEXT
  /** return a servername extension value if provided in Client Hello, or NULL.
   * So far, only host_name types are defined (RFC 3546).
   */
  
  const char *SSL_get_servername(const SSL *s, const int type)
  	{
  	if (type != TLSEXT_NAMETYPE_host_name)
  		return NULL;
  
  	return s->session && !s->tlsext_hostname ?
  		s->session->tlsext_hostname :
  		s->tlsext_hostname;
  	}
  
  int SSL_get_servername_type(const SSL *s)
  	{
  	if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
  		return TLSEXT_NAMETYPE_host_name;
  	return -1;
  	}
  #endif
  
  static 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. */
  static 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, SSL_SESSION)
  static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)
  
  SSL_CTX *SSL_CTX_new(const 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_SSL_SESSION_new();
  	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,
  		meth->version == SSL2_VERSION ? "SSLv2" : 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();
  
  	ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;
  
  #ifndef OPENSSL_NO_TLSEXT
  	ret->tlsext_servername_callback = 0;
  	ret->tlsext_servername_arg = NULL;
  	/* Setup RFC4507 ticket keys */
  	if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
  		|| (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
  		|| (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
  		ret->options |= SSL_OP_NO_TICKET;
  
  	ret->tlsext_status_cb = 0;
  	ret->tlsext_status_arg = NULL;
  
  #endif
  #ifndef OPENSSL_NO_PSK
  	ret->psk_identity_hint=NULL;
  	ret->psk_client_callback=NULL;
  	ret->psk_server_callback=NULL;
  #endif
  #ifndef OPENSSL_NO_BUF_FREELISTS
  	ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
  	ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
  	if (!ret->rbuf_freelist)
  		goto err;
  	ret->rbuf_freelist->chunklen = 0;
  	ret->rbuf_freelist->len = 0;
  	ret->rbuf_freelist->head = NULL;
  	ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
  	if (!ret->wbuf_freelist)
  		{
  		OPENSSL_free(ret->rbuf_freelist);
  		goto err;
  		}
  	ret->wbuf_freelist->chunklen = 0;
  	ret->wbuf_freelist->len = 0;
  	ret->wbuf_freelist->head = NULL;
  #endif
  #ifndef OPENSSL_NO_ENGINE
  	ret->client_cert_engine = NULL;
  #ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
  #define eng_strx(x)	#x
  #define eng_str(x)	eng_strx(x)
  	/* Use specific client engine automatically... ignore errors */
  	{
  	ENGINE *eng;
  	eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
  	if (!eng)
  		{
  		ERR_clear_error();
  		ENGINE_load_builtin_engines();
  		eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
  		}
  	if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
  		ERR_clear_error();
  	}
  #endif
  #endif
  	/* Default is to connect to non-RI servers. When RI is more widely
  	 * deployed might change this.
  	 */
  	ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;
  
  	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
  
  #ifndef OPENSSL_NO_BUF_FREELISTS
  static void
  ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
  	{
  	SSL3_BUF_FREELIST_ENTRY *ent, *next;
  	for (ent = list->head; ent; ent = next)
  		{
  		next = ent->next;
  		OPENSSL_free(ent);
  		}
  	OPENSSL_free(list);
  	}
  #endif
  
  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_SSL_SESSION_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
  
  #ifndef OPENSSL_NO_PSK
  	if (a->psk_identity_hint)
  		OPENSSL_free(a->psk_identity_hint);
  #endif
  #ifndef OPENSSL_NO_ENGINE
  	if (a->client_cert_engine)
  		ENGINE_finish(a->client_cert_engine);
  #endif
  
  #ifndef OPENSSL_NO_BUF_FREELISTS
  	if (a->wbuf_freelist)
  		ssl_buf_freelist_free(a->wbuf_freelist);
  	if (a->rbuf_freelist)
  		ssl_buf_freelist_free(a->rbuf_freelist);
  #endif
  
  	OPENSSL_free(a);
  	}
  
  void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
  	{
  	ctx->default_passwd_callback=cb;
  	}
  
  void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
  	{
  	ctx->default_passwd_callback_userdata=u;
  	}
  
  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;
  	}
  
  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;
  	}
  
  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, const 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_k,mask_a,emask_k,emask_a;
  	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, pk_nid = 0, md_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_k=0;
  	mask_a=0;
  	emask_k=0;
  	emask_a=0;
  
  	
  
  #ifdef CIPHER_DEBUG
  	printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
  	        rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
  		rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
  #endif
  	
  	cpk = &(c->pkeys[SSL_PKEY_GOST01]);
  	if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
  		mask_k |= SSL_kGOST;
  		mask_a |= SSL_aGOST01;
  	}
  	cpk = &(c->pkeys[SSL_PKEY_GOST94]);
  	if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
  		mask_k |= SSL_kGOST;
  		mask_a |= SSL_aGOST94;
  	}
  
  	if (rsa_enc || (rsa_tmp && rsa_sign))
  		mask_k|=SSL_kRSA;
  	if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
  		emask_k|=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_k|=SSL_kEDH;
  	if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
  		(rsa_enc || rsa_sign || dsa_sign))
  		emask_k|=SSL_kEDH;
  #endif
  
  	if (dh_tmp_export)
  		emask_k|=SSL_kEDH;
  
  	if (dh_tmp)
  		mask_k|=SSL_kEDH;
  
  	if (dh_rsa) mask_k|=SSL_kDHr;
  	if (dh_rsa_export) emask_k|=SSL_kDHr;
  
  	if (dh_dsa) mask_k|=SSL_kDHd;
  	if (dh_dsa_export) emask_k|=SSL_kDHd;
  
  	if (rsa_enc || rsa_sign)
  		{
  		mask_a|=SSL_aRSA;
  		emask_a|=SSL_aRSA;
  		}
  
  	if (dsa_sign)
  		{
  		mask_a|=SSL_aDSS;
  		emask_a|=SSL_aDSS;
  		}
  
  	mask_a|=SSL_aNULL;
  	emask_a|=SSL_aNULL;
  
  #ifndef OPENSSL_NO_KRB5
  	mask_k|=SSL_kKRB5;
  	mask_a|=SSL_aKRB5;
  	emask_k|=SSL_kKRB5;
  	emask_a|=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);
  			OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
  			}
  #ifndef OPENSSL_NO_ECDH
  		if (ecdh_ok)
  			{
  
  			if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
  				{
  				mask_k|=SSL_kECDHr;
  				mask_a|=SSL_aECDH;
  				if (ecc_pkey_size <= 163)
  					{
  					emask_k|=SSL_kECDHr;
  					emask_a|=SSL_aECDH;
  					}
  				}
  
  			if (pk_nid == NID_X9_62_id_ecPublicKey)
  				{
  				mask_k|=SSL_kECDHe;
  				mask_a|=SSL_aECDH;
  				if (ecc_pkey_size <= 163)
  					{
  					emask_k|=SSL_kECDHe;
  					emask_a|=SSL_aECDH;
  					}
  				}
  			}
  #endif
  #ifndef OPENSSL_NO_ECDSA
  		if (ecdsa_ok)
  			{
  			mask_a|=SSL_aECDSA;
  			emask_a|=SSL_aECDSA;
  			}
  #endif
  		}
  
  #ifndef OPENSSL_NO_ECDH
  	if (have_ecdh_tmp)
  		{
  		mask_k|=SSL_kEECDH;
  		emask_k|=SSL_kEECDH;
  		}
  #endif
  
  #ifndef OPENSSL_NO_PSK
  	mask_k |= SSL_kPSK;
  	mask_a |= SSL_aPSK;
  	emask_k |= SSL_kPSK;
  	emask_a |= SSL_aPSK;
  #endif
  
  	c->mask_k=mask_k;
  	c->mask_a=mask_a;
  	c->export_mask_k=emask_k;
  	c->export_mask_a=emask_a;
  	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)))
  
  #ifndef OPENSSL_NO_EC
  
  int ssl_check_srvr_ecc_cert_and_alg(X509 *x, const SSL_CIPHER *cs)
  	{
  	unsigned long alg_k, alg_a;
  	EVP_PKEY *pkey = NULL;
  	int keysize = 0;
  	int signature_nid = 0, md_nid = 0, pk_nid = 0;
  
  	alg_k = cs->algorithm_mkey;
  	alg_a = cs->algorithm_auth;
  
  	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);
  		OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
  		}
  	if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
  		{
  		/* key usage, if present, must allow key agreement */
  		if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
  			{
  			SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
  			return 0;
  			}
  		if (alg_k & SSL_kECDHe)
  			{
  			/* signature alg must be ECDSA */
  			if (pk_nid != NID_X9_62_id_ecPublicKey)
  				{
  				SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
  				return 0;
  				}
  			}
  		if (alg_k & SSL_kECDHr)
  			{
  			/* signature alg must be RSA */
  
  			if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
  				{
  				SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
  				return 0;
  				}
  			}
  		}
  	if (alg_a & SSL_aECDSA)
  		{
  		/* key usage, if present, must allow signing */
  		if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
  			{
  			SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
  			return 0;
  			}
  		}
  
  	return 1;  /* all checks are ok */
  	}
  
  #endif
  
  /* THIS NEEDS CLEANING UP */
  X509 *ssl_get_server_send_cert(SSL *s)
  	{
  	unsigned long alg_k,alg_a;
  	CERT *c;
  	int i;
  
  	c=s->cert;
  	ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
  	
  	alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
  	alg_a = s->s3->tmp.new_cipher->algorithm_auth;
  
  	if (alg_k & (SSL_kECDHr|SSL_kECDHe))
  		{
  		/* we don't need to look at SSL_kEECDH
  		 * since no certificate is needed for
  		 * anon ECDH and for authenticated
  		 * EECDH, the check for the auth
  		 * algorithm will set i correctly
  		 * NOTE: For ECDH-RSA, we need an ECC
  		 * not an RSA cert but for EECDH-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 (alg_a & SSL_aECDSA)
  		{
  		i=SSL_PKEY_ECC;
  		}
  	else if (alg_k & SSL_kDHr)
  		i=SSL_PKEY_DH_RSA;
  	else if (alg_k & SSL_kDHd)
  		i=SSL_PKEY_DH_DSA;
  	else if (alg_a & SSL_aDSS)
  		i=SSL_PKEY_DSA_SIGN;
  	else if (alg_a & SSL_aRSA)
  		{
  		if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
  			i=SSL_PKEY_RSA_SIGN;
  		else
  			i=SSL_PKEY_RSA_ENC;
  		}
  	else if (alg_a & SSL_aKRB5)
  		{
  		/* VRS something else here? */
  		return(NULL);
  		}
  	else if (alg_a & SSL_aGOST94) 
  		i=SSL_PKEY_GOST94;
  	else if (alg_a & SSL_aGOST01)
  		i=SSL_PKEY_GOST01;
  	else /* if (alg_a & 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,const SSL_CIPHER *cipher)
  	{
  	unsigned long alg_a;
  	CERT *c;
  
  	alg_a = cipher->algorithm_auth;
  	c=s->cert;
  
  	if ((alg_a & SSL_aDSS) &&
  		(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
  		return(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey);
  	else if (alg_a & 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_a & SSL_aECDSA) &&
  	         (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
  		return(c->pkeys[SSL_PKEY_ECC].privatekey);
  	else /* if (alg_a & 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->session_ctx->session_cache_mode;
  	if ((i & mode) && (!s->hit)
  		&& ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
  		    || SSL_CTX_add_session(s->session_ctx,s->session))
  		&& (s->session_ctx->new_session_cb != NULL))
  		{
  		CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
  		if (!s->session_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->session_ctx->stats.sess_connect_good
  			:s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
  			{
  			SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
  			}
  		}
  	}
  
  const SSL_METHOD *SSL_get_ssl_method(SSL *s)
  	{
  	return(s->method);
  	}
  
  int SSL_set_ssl_method(SSL *s, const 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);
  	}
  
  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);
  	}
  
  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 */
  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);
  	ssl_clear_hash_ctx(&s->read_hash);
  	ssl_clear_hash_ctx(&s->write_hash);
  	}
  
  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);
  	ssl_clear_hash_ctx(&s->read_hash);
  	ssl_clear_hash_ctx(&s->write_hash);
  	}
  
  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);
  	}
  
  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");
  	}
  
  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 */
  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 */
  EVP_PKEY *SSL_get_privatekey(SSL *s)
  	{
  	if (s->cert != NULL)
  		return(s->cert->key->privatekey);
  	else
  		return(NULL);
  	}
  
  const 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
  const void *SSL_get_current_compression(SSL *s)
  	{
  	return NULL;
  	}
  const void *SSL_get_current_expansion(SSL *s)
  	{
  	return NULL;
  	}
  #else
  
  const COMP_METHOD *SSL_get_current_compression(SSL *s)
  	{
  	if (s->compress != NULL)
  		return(s->compress->meth);
  	return(NULL);
  	}
  
  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;
  	}
  	
  void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
  	{
  	ctx->quiet_shutdown=mode;
  	}
  
  int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
  	{
  	return(ctx->quiet_shutdown);
  	}
  
  void SSL_set_quiet_shutdown(SSL *s,int mode)
  	{
  	s->quiet_shutdown=mode;
  	}
  
  int SSL_get_quiet_shutdown(const SSL *s)
  	{
  	return(s->quiet_shutdown);
  	}
  
  void SSL_set_shutdown(SSL *s,int mode)
  	{
  	s->shutdown=mode;
  	}
  
  int SSL_get_shutdown(const SSL *s)
  	{
  	return(s->shutdown);
  	}
  
  int SSL_version(const SSL *s)
  	{
  	return(s->version);
  	}
  
  SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
  	{
  	return(ssl->ctx);
  	}
  
  SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
  	{
  	if (ssl->ctx == ctx)
  		return ssl->ctx;
  #ifndef OPENSSL_NO_TLSEXT
  	if (ctx == NULL)
  		ctx = ssl->initial_ctx;
  #endif
  	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
  int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
  	{
  	return(X509_STORE_set_default_paths(ctx->cert_store));
  	}
  
  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
  
  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.  */
  void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
  	{
  	return ssl->info_callback;
  	}
  
  int SSL_state(const SSL *ssl)
  	{
  	return(ssl->state);
  	}
  
  void SSL_set_verify_result(SSL *ssl,long arg)
  	{
  	ssl->verify_result=arg;
  	}
  
  long SSL_get_verify_result(const SSL *ssl)
  	{
  	return(ssl->verify_result);
  	}
  
  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);
  	}
  
  int SSL_set_ex_data(SSL *s,int idx,void *arg)
  	{
  	return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
  	}
  
  void *SSL_get_ex_data(const SSL *s,int idx)
  	{
  	return(CRYPTO_get_ex_data(&s->ex_data,idx));
  	}
  
  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);
  	}
  
  int SSL_CTX_set_ex_data(SSL_CTX *s,int idx,void *arg)
  	{
  	return(CRYPTO_set_ex_data(&s->ex_data,idx,arg));
  	}
  
  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);
  	}
  
  X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx)
  	{
  	return(ctx->cert_store);
  	}
  
  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;
  	}
  
  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
  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);
      }
  
  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
  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);
  	}
  
  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
  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);
  	}
  
  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
  
  #ifndef OPENSSL_NO_PSK
  int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
  	{
  	if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
  		{
  		SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
  		return 0;
  		}
  	if (ctx->psk_identity_hint != NULL)
  		OPENSSL_free(ctx->psk_identity_hint);
  	if (identity_hint != NULL)
  		{
  		ctx->psk_identity_hint = BUF_strdup(identity_hint);
  		if (ctx->psk_identity_hint == NULL)
  			return 0;
  		}
  	else
  		ctx->psk_identity_hint = NULL;
  	return 1;
  	}
  
  int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
  	{
  	if (s == NULL)
  		return 0;
  
  	if (s->session == NULL)
  		return 1; /* session not created yet, ignored */
  
  	if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
  		{
  		SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
  		return 0;
  		}
  	if (s->session->psk_identity_hint != NULL)
  		OPENSSL_free(s->session->psk_identity_hint);
  	if (identity_hint != NULL)
  		{
  		s->session->psk_identity_hint = BUF_strdup(identity_hint);
  		if (s->session->psk_identity_hint == NULL)
  			return 0;
  		}
  	else
  		s->session->psk_identity_hint = NULL;
  	return 1;
  	}
  
  const char *SSL_get_psk_identity_hint(const SSL *s)
  	{
  	if (s == NULL || s->session == NULL)
  		return NULL;
  	return(s->session->psk_identity_hint);
  	}
  
  const char *SSL_get_psk_identity(const SSL *s)
  	{
  	if (s == NULL || s->session == NULL)
  		return NULL;
  	return(s->session->psk_identity);
  	}
  
  void SSL_set_psk_client_callback(SSL *s,
      unsigned int (*cb)(SSL *ssl, const char *hint,
                         char *identity, unsigned int max_identity_len, unsigned char *psk,
                         unsigned int max_psk_len))
  	{
  	s->psk_client_callback = cb;
  	}
  
  void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
      unsigned int (*cb)(SSL *ssl, const char *hint,
                         char *identity, unsigned int max_identity_len, unsigned char *psk,
                         unsigned int max_psk_len))
  	{
  	ctx->psk_client_callback = cb;
  	}
  
  void SSL_set_psk_server_callback(SSL *s,
      unsigned int (*cb)(SSL *ssl, const char *identity,
                         unsigned char *psk, unsigned int max_psk_len))
  	{
  	s->psk_server_callback = cb;
  	}
  
  void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
      unsigned int (*cb)(SSL *ssl, const char *identity,
                         unsigned char *psk, unsigned int max_psk_len))
  	{
  	ctx->psk_server_callback = cb;
  	}
  #endif
  
  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);
  	}
  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);
  	}
  
  /* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
   * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
   * any. If EVP_MD pointer is passed, initializes ctx with this md
   * Returns newly allocated ctx;
   */
  
  EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md) 
  {
  	ssl_clear_hash_ctx(hash);
  	*hash = EVP_MD_CTX_create();
  	if (md) EVP_DigestInit_ex(*hash,md,NULL);
  	return *hash;
  }
  void ssl_clear_hash_ctx(EVP_MD_CTX **hash) 
  {
  
  	if (*hash) EVP_MD_CTX_destroy(*hash);
  	*hash=NULL;
  }
  
  #if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
  #include "../crypto/bio/bss_file.c"
  #endif
  
  IMPLEMENT_STACK_OF(SSL_CIPHER)
  IMPLEMENT_STACK_OF(SSL_COMP)
  IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
  				    ssl_cipher_id);
  