Import LibreSSL v2.4.2 to vendor branch

[dragonfly.git] / crypto / libressl / ssl / ssl_lib.c

/* $OpenBSD: ssl_lib.c,v 1.115 2015/10/19 17:59:39 beck Exp $ */
/* 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 <openssl/bn.h>
#include <openssl/dh.h>
#include <openssl/lhash.h>
#include <openssl/objects.h>
#include <openssl/ocsp.h>
#include <openssl/x509v3.h>

#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif

#include "bytestring.h"

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.
         */
        .enc = (int (*)(SSL *, int))ssl_undefined_function,
        .mac = (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
        .setup_key_block = ssl_undefined_function,
        .generate_master_secret = (int (*)(SSL *, unsigned char *,
            unsigned char *, int))ssl_undefined_function,
        .change_cipher_state = (int (*)(SSL*, int))ssl_undefined_function,
        .final_finish_mac = (int (*)(SSL *,  const char*, int,
            unsigned char *))ssl_undefined_function,
        .finish_mac_length = 0,
        .cert_verify_mac = (int (*)(SSL *, int,
            unsigned char *))ssl_undefined_function,
        .client_finished_label = NULL,
        .client_finished_label_len = 0,
        .server_finished_label = NULL,
        .server_finished_label_len = 0,
        .alert_value = (int (*)(int))ssl_undefined_function,
        .export_keying_material = (int (*)(SSL *, unsigned char *, size_t,
            const char *, size_t, const unsigned char *, size_t,
            int use_context))ssl_undefined_function,
        .enc_flags = 0,
};

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 (s->renegotiate) {
                SSLerr(SSL_F_SSL_CLEAR, ERR_R_INTERNAL_ERROR);
                return (0);
        }

        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;

        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;

        /*
         * 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
                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 = calloc(1, sizeof(SSL));
        if (s == NULL)
                goto err;


        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;
        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);
        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;
        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;
        s->next_proto_negotiated = NULL;

        if (s->ctx->alpn_client_proto_list != NULL) {
                s->alpn_client_proto_list =
                    malloc(s->ctx->alpn_client_proto_list_len);
                if (s->alpn_client_proto_list == NULL)
                        goto err;
                memcpy(s->alpn_client_proto_list,
                    s->ctx->alpn_client_proto_list,
                    s->ctx->alpn_client_proto_list_len);
                s->alpn_client_proto_list_len =
                    s->ctx->alpn_client_proto_list_len;
        }

        s->verify_result = X509_V_OK;

        s->method = ctx->method;

        if (!s->method->ssl_new(s))
                goto err;

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

        SSL_clear(s);

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

        return (s);

err:
        SSL_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 != s->wbio)
                BIO_free_all(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 */

        free(s->tlsext_hostname);
        SSL_CTX_free(s->initial_ctx);
        free(s->tlsext_ecpointformatlist);
        free(s->tlsext_ellipticcurvelist);
        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);
        free(s->tlsext_ocsp_resp);

        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);

        SSL_CTX_free(s->ctx);


        free(s->next_proto_negotiated);
        free(s->alpn_client_proto_list);

#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 != rbio && s->rbio != s->wbio)
                BIO_free_all(s->rbio);
        if (s->wbio != 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);
}

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);
}


/* 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 == NULL)
                SSL_set_accept_state(s); /* Not properly initialized yet */

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

int
SSL_connect(SSL *s)
{
        if (s->handshake_func == NULL)
                SSL_set_connect_state(s); /* Not properly initialized yet */

        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 == NULL) {
                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 == NULL) {
                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 == NULL) {
                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 == NULL) {
                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_IS_DTLS(s)) {
                        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;
        if (sk_SSL_CIPHER_num(sk) == 0)
                return (NULL);

        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              i;
        SSL_CIPHER      *c;
        unsigned char   *q;

        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;

                s2n(ssl3_cipher_get_value(c), p);
        }

        /*
         * If p == q, no ciphers and caller indicates an error. Otherwise
         * add SCSV if not renegotiating.
         */
        if (p != q && !s->renegotiate)
                s2n(SSL3_CK_SCSV & SSL3_CK_VALUE_MASK, p);

        return (p - q);
}

STACK_OF(SSL_CIPHER) *
ssl_bytes_to_cipher_list(SSL *s, const unsigned char *p, int num)
{
        CBS                      cbs;
        const SSL_CIPHER        *c;
        STACK_OF(SSL_CIPHER)    *sk = NULL;
        unsigned long            cipher_id;
        uint16_t                 cipher_value, max_version;

        if (s->s3)
                s->s3->send_connection_binding = 0;

        /*
         * RFC 5246 section 7.4.1.2 defines the interval as [2,2^16-2].
         */
        if (num < 2 || num > 0x10000 - 2) {
                SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
                    SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
                return (NULL);
        }

        if ((sk = sk_SSL_CIPHER_new_null()) == NULL) {
                SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST, ERR_R_MALLOC_FAILURE);
                goto err;
        }

        CBS_init(&cbs, p, num);
        while (CBS_len(&cbs) > 0) {
                if (!CBS_get_u16(&cbs, &cipher_value)) {
                        SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
                            SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
                        goto err;
                }

                cipher_id = SSL3_CK_ID | cipher_value;

                if (s->s3 != NULL && cipher_id == SSL3_CK_SCSV) {
                        /*
                         * TLS_EMPTY_RENEGOTIATION_INFO_SCSV is 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;
                        continue;
                }

                if (cipher_id == SSL3_CK_FALLBACK_SCSV) {
                        /*
                         * TLS_FALLBACK_SCSV indicates that the client
                         * previously tried a higher protocol version.
                         * Fail if the current version is an unexpected
                         * downgrade.
                         */
                        max_version = ssl_max_server_version(s);
                        if (max_version == 0 || s->version < max_version) {
                                SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
                                    SSL_R_INAPPROPRIATE_FALLBACK);
                                if (s->s3 != NULL)
                                        ssl3_send_alert(s, SSL3_AL_FATAL,
                                            SSL_AD_INAPPROPRIATE_FALLBACK);
                                goto err;
                        }
                        continue;
                }

                if ((c = ssl3_get_cipher_by_value(cipher_value)) != NULL) {
                        if (!sk_SSL_CIPHER_push(sk, c)) {
                                SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,
                                    ERR_R_MALLOC_FAILURE);
                                goto err;
                        }
                }
        }

        return (sk);

err:
        sk_SSL_CIPHER_free(sk);

        return (NULL);
}


/*
 * 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);
}

/*
 * 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;
}

/*
 * SSL_CTX_set_alpn_protos sets the ALPN protocol list to the specified
 * protocols, which must be in wire-format (i.e. a series of non-empty,
 * 8-bit length-prefixed strings). Returns 0 on success.
 */
int
SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos,
    unsigned int protos_len)
{
        free(ctx->alpn_client_proto_list);
        if ((ctx->alpn_client_proto_list = malloc(protos_len)) == NULL)
                return (1);
        memcpy(ctx->alpn_client_proto_list, protos, protos_len);
        ctx->alpn_client_proto_list_len = protos_len;

        return (0);
}

/*
 * SSL_set_alpn_protos sets the ALPN protocol list to the specified
 * protocols, which must be in wire-format (i.e. a series of non-empty,
 * 8-bit length-prefixed strings). Returns 0 on success.
 */
int
SSL_set_alpn_protos(SSL *ssl, const unsigned char* protos,
    unsigned int protos_len)
{
        free(ssl->alpn_client_proto_list);
        if ((ssl->alpn_client_proto_list = malloc(protos_len)) == NULL)
                return (1);
        memcpy(ssl->alpn_client_proto_list, protos, protos_len);
        ssl->alpn_client_proto_list_len = protos_len;

        return (0);
}

/*
 * SSL_CTX_set_alpn_select_cb sets a callback function that is called during
 * ClientHello processing in order to select an ALPN protocol from the
 * client's list of offered protocols.
 */
void
SSL_CTX_set_alpn_select_cb(SSL_CTX* ctx,
    int (*cb) (SSL *ssl, const unsigned char **out, unsigned char *outlen,
    const unsigned char *in, unsigned int inlen, void *arg), void *arg)
{
        ctx->alpn_select_cb = cb;
        ctx->alpn_select_cb_arg = arg;
}

/*
 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any). On return
 * it sets data to point to len bytes of protocol name (not including the
 * leading length-prefix byte). If the server didn't respond with* a negotiated
 * protocol then len will be zero.
 */
void
SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
    unsigned *len)
{
        *data = NULL;
        *len = 0;

        if (ssl->s3 != NULL) {
                *data = ssl->s3->alpn_selected;
                *len = ssl->s3->alpn_selected_len;
        }
}

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)
{
        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);
        if (timingsafe_memcmp(a->session_id, b->session_id, a->session_id_length) != 0)
                return (1);
        return (0);
}

/*
 * 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 = calloc(1, sizeof(SSL_CTX));
        if (ret == NULL)
                goto err;

        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->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;
        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;

        ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;

        ret->tlsext_servername_callback = 0;
        ret->tlsext_servername_arg = NULL;

        /* Setup RFC4507 ticket keys */
        arc4random_buf(ret->tlsext_tick_key_name, 16);
        arc4random_buf(ret->tlsext_tick_hmac_key, 16);
        arc4random_buf(ret->tlsext_tick_aes_key, 16);

        ret->tlsext_status_cb = 0;
        ret->tlsext_status_arg = NULL;

        ret->next_protos_advertised_cb = 0;
        ret->next_proto_select_cb = 0;
#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:
        SSL_CTX_free(ret);
        return (NULL);
}

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);

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

#ifndef OPENSSL_NO_ENGINE
        if (a->client_cert_engine)
                ENGINE_finish(a->client_cert_engine);
#endif

        free(a->alpn_client_proto_list);

        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_sign, dh_tmp, dsa_sign;
        unsigned long    mask_k, mask_a;
        int              have_ecc_cert, ecdh_ok, ecdsa_ok;
        int              have_ecdh_tmp;
        X509            *x = NULL;
        EVP_PKEY        *ecc_pkey = NULL;
        int              signature_nid = 0, pk_nid = 0, md_nid = 0;

        if (c == NULL)
                return;

        dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL ||
            c->dh_tmp_auto != 0);

        have_ecdh_tmp = (c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL ||
            c->ecdh_tmp_auto != 0);
        cpk = &(c->pkeys[SSL_PKEY_RSA_ENC]);
        rsa_enc = (cpk->x509 != NULL && cpk->privatekey != NULL);
        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);
/* FIX THIS EAY EAY EAY */
        cpk = &(c->pkeys[SSL_PKEY_ECC]);
        have_ecc_cert = (cpk->x509 != NULL && cpk->privatekey != NULL);
        mask_k = 0;
        mask_a = 0;

        cpk = &(c->pkeys[SSL_PKEY_GOST01]);
        if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
                mask_k |= SSL_kGOST;
                mask_a |= SSL_aGOST01;
        }

        if (rsa_enc)
                mask_k|=SSL_kRSA;

        if (dh_tmp)
                mask_k|=SSL_kDHE;

        if (rsa_enc || rsa_sign)
                mask_a|=SSL_aRSA;

        if (dsa_sign)
                mask_a|=SSL_aDSS;

        mask_a|=SSL_aNULL;

        /*
         * 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);
                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);
                }
                if (ecdh_ok) {
                        if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa) {
                                mask_k|=SSL_kECDHr;
                                mask_a|=SSL_aECDH;
                        }
                        if (pk_nid == NID_X9_62_id_ecPublicKey) {
                                mask_k|=SSL_kECDHe;
                                mask_a|=SSL_aECDH;
                        }
                }
                if (ecdsa_ok)
                        mask_a|=SSL_aECDSA;
        }

        if (have_ecdh_tmp) {
                mask_k|=SSL_kECDHE;
        }


        c->mask_k = mask_k;
        c->mask_a = mask_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)))


int
ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
{
        unsigned long            alg_k, alg_a;
        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;

        /* 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 */
}


/* 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_kECDHE
                 * since no certificate is needed for
                 * anon ECDH and for authenticated
                 * ECDHE, the check for the auth
                 * algorithm will set i correctly
                 * NOTE: For ECDH-RSA, we need an ECC
                 * not an RSA cert but for 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_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_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);
}

DH *
ssl_get_auto_dh(SSL *s)
{
        CERT_PKEY *cpk;
        int keylen;
        DH *dhp;

        if (s->cert->dh_tmp_auto == 2) {
                keylen = 1024;
        } else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) {
                keylen = 1024;
                if (s->s3->tmp.new_cipher->strength_bits == 256)
                        keylen = 3072;
        } else {
                if ((cpk = ssl_get_server_send_pkey(s)) == NULL)
                        return (NULL);
                if (cpk->privatekey == NULL || cpk->privatekey->pkey.dh == NULL)
                        return (NULL);
                keylen = EVP_PKEY_bits(cpk->privatekey);
        }

        if ((dhp = DH_new()) == NULL)
                return (NULL);

        dhp->g = BN_new();
        if (dhp->g != NULL)
                BN_set_word(dhp->g, 2);

        if (keylen >= 8192)
                dhp->p = get_rfc3526_prime_8192(NULL);
        else if (keylen >= 4096)
                dhp->p = get_rfc3526_prime_4096(NULL);
        else if (keylen >= 3072)
                dhp->p = get_rfc3526_prime_3072(NULL);
        else if (keylen >= 2048)
                dhp->p = get_rfc3526_prime_2048(NULL);
        else if (keylen >= 1536)
                dhp->p = get_rfc3526_prime_1536(NULL);
        else
                dhp->p = get_rfc2409_prime_1024(NULL);

        if (dhp->p == NULL || dhp->g == NULL) {
                DH_free(dhp);
                return (NULL);
        }
        return (dhp);
}

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, 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);
}

const char *
ssl_version_string(int ver)
{
        switch (ver) {
        case DTLS1_VERSION:
                return (SSL_TXT_DTLS1);
        case TLS1_VERSION:
                return (SSL_TXT_TLSV1);
        case TLS1_1_VERSION:
                return (SSL_TXT_TLSV1_1);
        case TLS1_2_VERSION:
                return (SSL_TXT_TLSV1_2);
        default:
                return ("unknown");
        }
}

const char *
SSL_get_version(const SSL *s)
{
        return ssl_version_string(s->version);
}

uint16_t
ssl_max_server_version(SSL *s)
{
        uint16_t max_version;

        /*
         * The SSL method will be changed during version negotiation, as such
         * we want to use the SSL method from the context.
         */
        max_version = s->ctx->method->version;

        if (SSL_IS_DTLS(s))
                return (DTLS1_VERSION);

        if ((s->options & SSL_OP_NO_TLSv1_2) == 0 &&
            max_version >= TLS1_2_VERSION)
                return (TLS1_2_VERSION);
        if ((s->options & SSL_OP_NO_TLSv1_1) == 0 &&
            max_version >= TLS1_1_VERSION)
                return (TLS1_1_VERSION);
        if ((s->options & SSL_OP_NO_TLSv1) == 0 &&
            max_version >= TLS1_VERSION)
                return (TLS1_VERSION);

        return (0);
}

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

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

        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)
{
        EVP_CIPHER_CTX_free(s->enc_read_ctx);
        s->enc_read_ctx = NULL;
        EVP_CIPHER_CTX_free(s->enc_write_ctx);
        s->enc_write_ctx = NULL;

        if (s->aead_read_ctx != NULL) {
                EVP_AEAD_CTX_cleanup(&s->aead_read_ctx->ctx);
                free(s->aead_read_ctx);
                s->aead_read_ctx = NULL;
        }
        if (s->aead_write_ctx != NULL) {
                EVP_AEAD_CTX_cleanup(&s->aead_write_ctx->ctx);
                free(s->aead_write_ctx);
                s->aead_write_ctx = NULL;
        }

}

/* 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);
}
const void *
SSL_get_current_compression(SSL *s)
{
        return (NULL);
}

const void *
SSL_get_current_expansion(SSL *s)
{
        return (NULL);
}

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 == NULL)
                return;

        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);
        if (ctx == NULL)
                ctx = ssl->initial_ctx;
        if (ssl->cert != NULL)
                ssl_cert_free(ssl->cert);
        ssl->cert = ssl_cert_dup(ctx->cert);
        CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
        SSL_CTX_free(ssl->ctx); /* decrement reference count */
        ssl->ctx = ctx;
        return (ssl->ctx);
}

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));
}

int
SSL_CTX_load_verify_mem(SSL_CTX *ctx, void *buf, int len)
{
        return (X509_STORE_load_mem(ctx->cert_store, buf, len));
}

void
SSL_set_info_callback(SSL *ssl, void (*cb)(const SSL *ssl, int type, int val))
{
        ssl->info_callback = cb;
}

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);
}

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);
}

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);
}

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);
}


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);
}

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_OBJ_BSEARCH_GLOBAL_CMP_FN(SSL_CIPHER, SSL_CIPHER, ssl_cipher_id);