xref: /openbsd-current/lib/libssl/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.
 */

#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), 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 *)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

	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 */
		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);

	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);
	if (i > 0)
		return;

	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)
		free(s->tlsext_hostname);
	if (s->initial_ctx)
		SSL_CTX_free(s->initial_ctx);
#ifndef OPENSSL_NO_EC
	if (s->tlsext_ecpointformatlist)
		free(s->tlsext_ecpointformatlist);
	if (s->tlsext_ellipticcurvelist)
		free(s->tlsext_ellipticcurvelist);
#endif /* OPENSSL_NO_EC */
	if (s->tlsext_opaque_prf_input)
		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)
		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)
		free(s->next_proto_negotiated);
#endif

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

	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->renegotiate == 0)
		s->renegotiate = 1;

	s->new_session = 1;

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

int
SSL_renegotiate_abbreviated(SSL *s)
{
	if (s->renegotiate == 0)
		s->renegotiate = 1;

	s->new_session = 0;

	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->renegotiate != 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 *end;
	STACK_OF(SSL_CIPHER) *sk;
	SSL_CIPHER *c;
	size_t curlen = 0;
	int i;

	if ((s->session == NULL) || (s->session->ciphers == NULL) ||
		(len < 2))
	return (NULL);

	sk = s->session->ciphers;
	buf[0] = '\0';
	for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
		c = sk_SSL_CIPHER_value(sk, i);
		end = buf + curlen;
		if (strlcat(buf, c->name, len) >= len ||
			(curlen = strlcat(buf, ":", len)) >= len) {
			/* remove truncated cipher from list */
			*end = '\0';
			break;
		}
	}
	/* remove trailing colon */
	if ((end = strrchr(buf, ':')) != NULL)
		*end = '\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);
		/* Skip TLS v1.2 only ciphersuites if lower than v1.2 */
		if ((c->algorithm_ssl & SSL_TLSV1_2) &&
			(TLS1_get_client_version(s) < TLS1_2_VERSION))
		continue;
#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->renegotiate) {
		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->renegotiate) {
				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;
}

# ifndef OPENSSL_NO_NEXTPROTONEG
/* SSL_select_next_proto implements the standard protocol selection. It is
 * expected that this function is called from the callback set by
 * SSL_CTX_set_next_proto_select_cb.
 *
 * The protocol data is assumed to be a vector of 8-bit, length prefixed byte
 * strings. The length byte itself is not included in the length. A byte
 * string of length 0 is invalid. No byte string may be truncated.
 *
 * The current, but experimental algorithm for selecting the protocol is:
 *
 * 1) If the server doesn't support NPN then this is indicated to the
 * callback. In this case, the client application has to abort the connection
 * or have a default application level protocol.
 *
 * 2) If the server supports NPN, but advertises an empty list then the
 * client selects the first protcol in its list, but indicates via the
 * API that this fallback case was enacted.
 *
 * 3) Otherwise, the client finds the first protocol in the server's list
 * that it supports and selects this protocol. This is because it's
 * assumed that the server has better information about which protocol
 * a client should use.
 *
 * 4) If the client doesn't support any of the server's advertised
 * protocols, then this is treated the same as case 2.
 *
 * It returns either
 * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or
 * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached.
 */
int
SSL_select_next_proto(unsigned char **out, unsigned char *outlen, const unsigned char *server, unsigned int server_len, const unsigned char *client, unsigned int client_len)
{
	unsigned int i, j;
	const unsigned char *result;
	int status = OPENSSL_NPN_UNSUPPORTED;

	/* For each protocol in server preference order, see if we support it. */
	for (i = 0; i < server_len; ) {
		for (j = 0; j < client_len; ) {
			if (server[i] == client[j] &&
				memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) {
				/* We found a match */
				result = &server[i];
				status = OPENSSL_NPN_NEGOTIATED;
				goto found;
			}
			j += client[j];
			j++;
		}
		i += server[i];
		i++;
	}

	/* There's no overlap between our protocols and the server's list. */
	result = client;
	status = OPENSSL_NPN_NO_OVERLAP;

	found:
	*out = (unsigned char *) result + 1;
	*outlen = result[0];
	return status;
}

/* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's
 * requested protocol for this connection and returns 0. If the client didn't
 * request any protocol, then *data is set to NULL.
 *
 * Note that the client can request any protocol it chooses. The value returned
 * from this function need not be a member of the list of supported protocols
 * provided by the callback.
 */
void
SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data, unsigned *len)
{
	*data = s->next_proto_negotiated;
	if (!*data) {
		*len = 0;
	} else {
		*len = s->next_proto_negotiated_len;
	}
}

/* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a
 * TLS server needs a list of supported protocols for Next Protocol
 * Negotiation. The returned list must be in wire format.  The list is returned
 * by setting |out| to point to it and |outlen| to its length. This memory will
 * not be modified, but one should assume that the SSL* keeps a reference to
 * it.
 *
 * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. Otherwise, no
 * such extension will be included in the ServerHello. */
void
SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *ctx, int (*cb) (SSL *ssl, const unsigned char **out, unsigned int *outlen, void *arg), void *arg)
{
	ctx->next_protos_advertised_cb = cb;
	ctx->next_protos_advertised_cb_arg = arg;
}

/* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a
 * client needs to select a protocol from the server's provided list. |out|
 * must be set to point to the selected protocol (which may be within |in|).
 * The length of the protocol name must be written into |outlen|. The server's
 * advertised protocols are provided in |in| and |inlen|. The callback can
 * assume that |in| is syntactically valid.
 *
 * The client must select a protocol. It is fatal to the connection if this
 * callback returns a value other than SSL_TLSEXT_ERR_OK.
 */
void
SSL_CTX_set_next_proto_select_cb(SSL_CTX *ctx, int (*cb) (SSL *s, unsigned char **out, unsigned char *outlen, const unsigned char *in, unsigned int inlen, void *arg), void *arg)
{
	ctx->next_proto_select_cb = cb;
	ctx->next_proto_select_cb_arg = arg;
}
# endif
#endif

int
SSL_export_keying_material(SSL *s, unsigned char *out, size_t olen,
    const char *label, size_t llen, const unsigned char *p, size_t plen,
int use_context)
{
	if (s->version < TLS1_VERSION)
		return -1;

	return s->method->ssl3_enc->export_keying_material(s, out, olen, label,
	llen, p, plen,
	use_context);
}

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 *)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, 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->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;
	/* No compression for DTLS */
	if (meth->version != DTLS1_VERSION)
		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;

# ifndef OPENSSL_NO_NEXTPROTONEG
	ret->next_protos_advertised_cb = 0;
	ret->next_proto_select_cb = 0;
# endif
#endif
#ifndef OPENSSL_NO_PSK
	ret->psk_identity_hint = NULL;
	ret->psk_client_callback = NULL;
	ret->psk_server_callback = NULL;
#endif
#ifndef OPENSSL_NO_SRP
	SSL_CTX_SRP_CTX_init(ret);
#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)
	{ free(comp);
}
#endif

void
SSL_CTX_free(SSL_CTX *a)
{
	int i;

	if (a == NULL)
		return;

	i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_SSL_CTX);
	if (i > 0)
		return;

	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_SRTP
	if (a->srtp_profiles)
		sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);
#endif

#ifndef OPENSSL_NO_PSK
	if (a->psk_identity_hint)
		free(a->psk_identity_hint);
#endif
#ifndef OPENSSL_NO_SRP
	SSL_CTX_SRP_CTX_free(a);
#endif
#ifndef OPENSSL_NO_ENGINE
	if (a->client_cert_engine)
		ENGINE_finish(a->client_cert_engine);
#endif

	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);

	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));
#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, SSL *s)
{
	unsigned long alg_k, alg_a;
	EVP_PKEY *pkey = NULL;
	int keysize = 0;
	int signature_nid = 0, md_nid = 0, pk_nid = 0;
	const SSL_CIPHER *cs = s->s3->tmp.new_cipher;

	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) && TLS1_get_version(s) < TLS1_2_VERSION) {
			/* 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) && TLS1_get_version(s) < TLS1_2_VERSION) {
			/* 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 */
CERT_PKEY
*ssl_get_server_send_pkey(const 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_PKEY, ERR_R_INTERNAL_ERROR);
		return (NULL);
	}

	return c->pkeys + i;
}

X509
*ssl_get_server_send_cert(const SSL *s)
{
	CERT_PKEY *cpk;
	cpk = ssl_get_server_send_pkey(s);
	if (!cpk)
		return NULL;
	return cpk->x509;
}

EVP_PKEY
*ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *cipher, const EVP_MD **pmd)
{
	unsigned long alg_a;
	CERT *c;
	int idx = -1;

	alg_a = cipher->algorithm_auth;
	c = s->cert;

	if ((alg_a & SSL_aDSS) &&
		(c->pkeys[SSL_PKEY_DSA_SIGN].privatekey != NULL))
	idx = SSL_PKEY_DSA_SIGN;
	else if (alg_a & SSL_aRSA) {
		if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL)
			idx = SSL_PKEY_RSA_SIGN;
		else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL)
			idx = SSL_PKEY_RSA_ENC;
	} else if ((alg_a & SSL_aECDSA) &&
	(c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
	idx = SSL_PKEY_ECC;
	if (idx == -1) {
		SSLerr(SSL_F_SSL_GET_SIGN_PKEY, ERR_R_INTERNAL_ERROR);
		return (NULL);
	}
	if (pmd)
		*pmd = c->pkeys[idx].digest;
	return c->pkeys[idx].privatekey;
}

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->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_2_VERSION)
		return("TLSv1.2");
	else if (s->version == TLS1_1_VERSION)
		return("TLSv1.1");
	else if (s->version == TLS1_VERSION)
		return("TLSv1");
	else if (s->version == SSL3_VERSION)
		return("SSLv3");
	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->renegotiate = s->renegotiate;
	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);
		free(s->enc_read_ctx);
		s->enc_read_ctx = NULL;
	}
	if (s->enc_write_ctx != NULL) {
		EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
		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);
	}
	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_state(SSL *ssl, int state)
{
	ssl->state = 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
 */

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);
}

#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)
		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)
		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;
}

void
SSL_set_debug(SSL *s, int debug)
{
	s->debug = debug;
}

int
SSL_cache_hit(SSL *s)
{
	return s->hit;
}

IMPLEMENT_STACK_OF(SSL_CIPHER)
IMPLEMENT_STACK_OF(SSL_COMP)
IMPLEMENT_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER,
ssl_cipher_id);