ssl_lib.c

/*! \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 *, unsigned char *, size_t, const char *,
		 size_t, const unsigned char *, size_t,
		 int use_context)) 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->renegotiate) return(1);
#else
	if (s->renegotiate)
		{
		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;
# ifndef OPENSSL_NO_NEXTPROTONEG
	s->next_proto_negotiated = NULL;
# endif
#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
        
        s->proxies_len = 0;
        s->slices_len = 0;
        //s->i_mac = NULL;
        s->spp_write_ctx = NULL;
        s->spp_read_ctx = NULL;
        s->write_slice = NULL;
        s->read_slice = NULL;
        s->_proxy_id = 3;
        s->_slice_id = 2;
        s->def_ctx = (SPP_SLICE*)OPENSSL_malloc(sizeof(SPP_SLICE));
        spp_init_slice(s->def_ctx);
        s->def_ctx->slice_id = 1;
        s->def_ctx->read_mac = (SPP_MAC*)OPENSSL_malloc(sizeof(SPP_MAC));
        s->def_ctx->write_mac = s->def_ctx->read_mac;
        s->def_ctx->read_ciph = (SPP_CIPH*)OPENSSL_malloc(sizeof(SPP_CIPH));
        s->spp_server_address = NULL;
        /* Stats variables */
        s->read_stats.bytes = s->read_stats.app_bytes = s->read_stats.pad_bytes 
                = s->read_stats.header_bytes = s->read_stats.handshake_bytes
                = s->read_stats.alert_bytes = s->read_stats.mac_bytes = 0;
        s->write_stats.bytes = s->write_stats.app_bytes = s->write_stats.pad_bytes 
                = s->write_stats.header_bytes = s->write_stats.handshake_bytes
                = s->write_stats.alert_bytes = s->write_stats.mac_bytes = 0;

	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);
		}
        spp_clear_slices_ctx(s);
	ssl_clear_cipher_ctx(s);
	ssl_clear_hash_ctx(&s->read_hash);
	ssl_clear_hash_ctx(&s->write_hash);
        if (s->proxy_key_mat_shared_secret != NULL) {
            // Release the shared secret 
            OPENSSL_cleanse(s->proxy_key_mat_shared_secret,s->proxy_key_mat_shared_secret_len);
            OPENSSL_free(s->proxy_key_mat_shared_secret);
            s->proxy_key_mat_shared_secret = NULL;
            s->proxy_key_mat_shared_secret_len = 0;
        }

	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 */

#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
	if (s->next_proto_negotiated)
		OPENSSL_free(s->next_proto_negotiated);
#endif

#ifndef OPENSSL_NO_SRTP
        if (s->srtp_profiles)
            sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);
#endif

	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));
	}
int SPP_connect(SSL *ssl, SPP_SLICE* slices[], int slices_len, SPP_PROXY *proxies[], int proxies_len) {
    int i;
    if (slices_len < 1) {
        printf("Too few slices defined!\n");
        return -1;
    }
    if (slices_len > MAX_SPP_SLICES) {
        printf("Too many slices defined!\n");
        return -1;
    }
    ssl->slices_len = slices_len;
    for (i = 0; i < slices_len; i++) {
        ssl->slices[i] = slices[i];
    }
    if (proxies_len < 1) {
        printf("Too few proxies defined!\n");
        return -1;
    }
    if (proxies_len > MAX_SPP_PROXIES) {