ssl_lib.c

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/* Copyright (C) 1995-1998 Eric Young ([email protected])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([email protected]).
 * 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 ([email protected]).
 * 
 * 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 ([email protected])"
 *    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 ([email protected])"
 * 
 * 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
 *    [email protected].
 *
 * 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
 * ([email protected]).  This product includes software written by Tim
 * Hudson ([email protected]).
 *
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * ECC cipher suite support in OpenSSL originally developed by 
 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 */
/* ====================================================================
 * Copyright 2005 Nokia. All rights reserved.
 *
 * The portions of the attached software ("Contribution") is developed by
 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 * license.
 *
 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 * support (see RFC 4279) to OpenSSL.
 *
 * No patent licenses or other rights except those expressly stated in
 * the OpenSSL open source license shall be deemed granted or received
 * expressly, by implication, estoppel, or otherwise.
 *
 * No assurances are provided by Nokia that the Contribution does not
 * infringe the patent or other intellectual property rights of any third
 * party or that the license provides you with all the necessary rights
 * to make use of the Contribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 * OTHERWISE.
 */

#ifdef REF_CHECK
#  include <assert.h>
#endif
#include <stdio.h>
#include "ssl_locl.h"
#include "kssl_lcl.h"
#include <openssl/objects.h>
#include <openssl/lhash.h>
#include <openssl/x509v3.h>
#include <openssl/rand.h>
#include <openssl/ocsp.h>
#ifndef OPENSSL_NO_DH
#include <openssl/dh.h>
#endif
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif

const char *SSL_version_str=OPENSSL_VERSION_TEXT;

SSL3_ENC_METHOD ssl3_undef_enc_method={
    /* evil casts, but these functions are only called if there's a library bug */
    (int (*)(SSL *,int))ssl_undefined_function,
    (int (*)(SSL *, unsigned char *, int))ssl_undefined_function,
    ssl_undefined_function,
    (int (*)(SSL *, unsigned char *, unsigned char *, int))ssl_undefined_function,
    (int (*)(SSL*, int))ssl_undefined_function,
    (int (*)(SSL *,  const char*, int, unsigned char *))ssl_undefined_function,
    0,  /* finish_mac_length */
    (int (*)(SSL *, int, unsigned char *))ssl_undefined_function,
    NULL,   /* client_finished_label */
    0,  /* client_finished_label_len */
    NULL,   /* server_finished_label */
    0,  /* server_finished_label_len */
    (int (*)(int))ssl_undefined_function,
    (int (*)(SSL *, unsigned char *, size_t, const char *,
         size_t, const unsigned char *, size_t,
         int use_context)) ssl_undefined_function,
    };

int SSL_clear(SSL *s)
    {

    if (s->method == NULL)
        {
        SSLerr(SSL_F_SSL_CLEAR,SSL_R_NO_METHOD_SPECIFIED);
        return(0);
        }

    if (ssl_clear_bad_session(s))
        {
        SSL_SESSION_free(s->session);
        s->session=NULL;
        }

    s->error=0;
    s->hit=0;
    s->shutdown=0;

#if 0 /* Disabled since version 1.10 of this file (early return not
       * needed because SSL_clear is not called when doing renegotiation) */
    /* This is set if we are doing dynamic renegotiation so keep
     * the old cipher.  It is sort of a SSL_clear_lite :-) */
    if (s->renegotiate) return(1);
#else
    if (s->renegotiate)
        {
        SSLerr(SSL_F_SSL_CLEAR,ERR_R_INTERNAL_ERROR);
        return 0;
        }
#endif

    s->type=0;

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

    s->version=s->method->version;
    s->client_version=s->version;
    s->rwstate=SSL_NOTHING;
    s->rstate=SSL_ST_READ_HEADER;
#if 0
    s->read_ahead=s->ctx->read_ahead;
#endif

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

    ssl_clear_cipher_ctx(s);
    ssl_clear_hash_ctx(&s->read_hash);
    ssl_clear_hash_ctx(&s->write_hash);

    s->first_packet=0;

#if 1
    /* Check to see if we were changed into a different method, if
     * so, revert back if we are not doing session-id reuse. */
    if (!s->in_handshake && (s->session == NULL) && (s->method != s->ctx->method))
        {
        s->method->ssl_free(s);
        s->method=s->ctx->method;
        if (!s->method->ssl_new(s))
            return(0);
        }
    else
#endif
        s->method->ssl_clear(s);
    return(1);
    }

int SSL_CTX_set_ssl_version(SSL_CTX *ctx,const SSL_METHOD *meth)
    {
    STACK_OF(SSL_CIPHER) *sk;

    ctx->method=meth;

    sk=ssl_create_cipher_list(ctx->method,&(ctx->cipher_list),
        &(ctx->cipher_list_by_id),
        meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
    if ((sk == NULL) || (sk_SSL_CIPHER_num(sk) <= 0))
        {
        SSLerr(SSL_F_SSL_CTX_SET_SSL_VERSION,SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
        return(0);
        }
    return(1);
    }

SSL *SSL_new(SSL_CTX *ctx)
    {
    SSL *s;

    if (ctx == NULL)
        {
        SSLerr(SSL_F_SSL_NEW,SSL_R_NULL_SSL_CTX);
        return(NULL);
        }
    if (ctx->method == NULL)
        {
        SSLerr(SSL_F_SSL_NEW,SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
        return(NULL);
        }

    s=(SSL *)OPENSSL_malloc(sizeof(SSL));
    if (s == NULL) goto err;
    memset(s,0,sizeof(SSL));

#ifndef OPENSSL_NO_KRB5
    s->kssl_ctx = kssl_ctx_new();
#endif  /* OPENSSL_NO_KRB5 */

    s->options=ctx->options;
    s->mode=ctx->mode;
    s->max_cert_list=ctx->max_cert_list;

    if (ctx->cert != NULL)
        {
        /* Earlier library versions used to copy the pointer to
         * the CERT, not its contents; only when setting new
         * parameters for the per-SSL copy, ssl_cert_new would be
         * called (and the direct reference to the per-SSL_CTX
         * settings would be lost, but those still were indirectly
         * accessed for various purposes, and for that reason they
         * used to be known as s->ctx->default_cert).
         * Now we don't look at the SSL_CTX's CERT after having
         * duplicated it once. */

        s->cert = ssl_cert_dup(ctx->cert);
        if (s->cert == NULL)
            goto err;
        }
    else
        s->cert=NULL; /* Cannot really happen (see SSL_CTX_new) */

    s->read_ahead=ctx->read_ahead;
    s->msg_callback=ctx->msg_callback;
    s->msg_callback_arg=ctx->msg_callback_arg;
    s->verify_mode=ctx->verify_mode;
#if 0
    s->verify_depth=ctx->verify_depth;
#endif
    s->sid_ctx_length=ctx->sid_ctx_length;
    OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
    memcpy(&s->sid_ctx,&ctx->sid_ctx,sizeof(s->sid_ctx));
    s->verify_callback=ctx->default_verify_callback;
    s->generate_session_id=ctx->generate_session_id;

    s->param = X509_VERIFY_PARAM_new();
    if (!s->param)
        goto err;
    X509_VERIFY_PARAM_inherit(s->param, ctx->param);
#if 0
    s->purpose = ctx->purpose;
    s->trust = ctx->trust;
#endif
    s->quiet_shutdown=ctx->quiet_shutdown;
    s->max_send_fragment = ctx->max_send_fragment;

    CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
    s->ctx=ctx;
#ifndef OPENSSL_NO_TLSEXT
    s->tlsext_debug_cb = 0;
    s->tlsext_debug_arg = NULL;
    s->tlsext_ticket_expected = 0;
    s->tlsext_status_type = -1;
    s->tlsext_status_expected = 0;
    s->tlsext_ocsp_ids = NULL;
    s->tlsext_ocsp_exts = NULL;
    s->tlsext_ocsp_resp = NULL;
    s->tlsext_ocsp_resplen = -1;
    CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
    s->initial_ctx=ctx;
# ifndef OPENSSL_NO_NEXTPROTONEG
    s->next_proto_negotiated = NULL;
# endif
#endif

    s->verify_result=X509_V_OK;

    s->method=ctx->method;

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

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

    SSL_clear(s);

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

#ifndef OPENSSL_NO_PSK
    s->psk_client_callback=ctx->psk_client_callback;
    s->psk_server_callback=ctx->psk_server_callback;
#endif

    return(s);
err:
    if (s != NULL)
        {
        if (s->cert != NULL)
            ssl_cert_free(s->cert);
        if (s->ctx != NULL)
            SSL_CTX_free(s->ctx); /* decrement reference count */
        OPENSSL_free(s);
        }
    SSLerr(SSL_F_SSL_NEW,ERR_R_MALLOC_FAILURE);
    return(NULL);
    }

int SSL_CTX_set_session_id_context(SSL_CTX *ctx,const unsigned char *sid_ctx,
                   unsigned int sid_ctx_len)
    {
    if(sid_ctx_len > sizeof ctx->sid_ctx)
    {
    SSLerr(SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
    return 0;
    }
    ctx->sid_ctx_length=sid_ctx_len;
    memcpy(ctx->sid_ctx,sid_ctx,sid_ctx_len);

    return 1;
    }

int SSL_set_session_id_context(SSL *ssl,const unsigned char *sid_ctx,
                   unsigned int sid_ctx_len)
    {
    if(sid_ctx_len > SSL_MAX_SID_CTX_LENGTH)
    {
    SSLerr(SSL_F_SSL_SET_SESSION_ID_CONTEXT,SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG);
    return 0;
    }
    ssl->sid_ctx_length=sid_ctx_len;
    memcpy(ssl->sid_ctx,sid_ctx,sid_ctx_len);

    return 1;
    }

int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb)
    {
    CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX);
    ctx->generate_session_id = cb;
    CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX);
    return 1;
    }

int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb)
    {
    CRYPTO_w_lock(CRYPTO_LOCK_SSL);
    ssl->generate_session_id = cb;
    CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
    return 1;
    }

int SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
                unsigned int id_len)
    {
    /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how
     * we can "construct" a session to give us the desired check - ie. to
     * find if there's a session in the hash table that would conflict with
     * any new session built out of this id/id_len and the ssl_version in
     * use by this SSL. */
    SSL_SESSION r, *p;

    if(id_len > sizeof r.session_id)
        return 0;

    r.ssl_version = ssl->version;
    r.session_id_length = id_len;
    memcpy(r.session_id, id, id_len);
    /* NB: SSLv2 always uses a fixed 16-byte session ID, so even if a
     * callback is calling us to check the uniqueness of a shorter ID, it
     * must be compared as a padded-out ID because that is what it will be
     * converted to when the callback has finished choosing it. */
    if((r.ssl_version == SSL2_VERSION) &&
            (id_len < SSL2_SSL_SESSION_ID_LENGTH))
        {
        memset(r.session_id + id_len, 0,
            SSL2_SSL_SESSION_ID_LENGTH - id_len);
        r.session_id_length = SSL2_SSL_SESSION_ID_LENGTH;
        }

    CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
    p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r);
    CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX);
    return (p != NULL);
    }

int SSL_CTX_set_purpose(SSL_CTX *s, int purpose)
    {
    return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
    }

int SSL_set_purpose(SSL *s, int purpose)
    {
    return X509_VERIFY_PARAM_set_purpose(s->param, purpose);
    }

int SSL_CTX_set_trust(SSL_CTX *s, int trust)
    {
    return X509_VERIFY_PARAM_set_trust(s->param, trust);
    }

int SSL_set_trust(SSL *s, int trust)
    {
    return X509_VERIFY_PARAM_set_trust(s->param, trust);
    }

int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm)
    {
    return X509_VERIFY_PARAM_set1(ctx->param, vpm);
    }

int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm)
    {
    return X509_VERIFY_PARAM_set1(ssl->param, vpm);
    }

void SSL_free(SSL *s)
    {
    int i;

    if(s == NULL)
        return;

    i=CRYPTO_add(&s->references,-1,CRYPTO_LOCK_SSL);
#ifdef REF_PRINT
    REF_PRINT("SSL",s);
#endif
    if (i > 0) return;
#ifdef REF_CHECK
    if (i < 0)
        {
        fprintf(stderr,"SSL_free, bad reference count\n");
        abort(); /* ok */
        }
#endif

    if (s->param)
        X509_VERIFY_PARAM_free(s->param);

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

    if (s->bbio != NULL)
        {
        /* If the buffering BIO is in place, pop it off */
        if (s->bbio == s->wbio)
            {
            s->wbio=BIO_pop(s->wbio);
            }
        BIO_free(s->bbio);
        s->bbio=NULL;
        }
    if (s->rbio != NULL)
        BIO_free_all(s->rbio);
    if ((s->wbio != NULL) && (s->wbio != s->rbio))
        BIO_free_all(s->wbio);

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

    /* add extra stuff */
    if (s->cipher_list != NULL) sk_SSL_CIPHER_free(s->cipher_list);
    if (s->cipher_list_by_id != NULL) sk_SSL_CIPHER_free(s->cipher_list_by_id);

    /* Make the next call work :-) */
    if (s->session != NULL)
        {
        ssl_clear_bad_session(s);
        SSL_SESSION_free(s->session);
        }

    ssl_clear_cipher_ctx(s);
    ssl_clear_hash_ctx(&s->read_hash);
    ssl_clear_hash_ctx(&s->write_hash);

    if (s->cert != NULL) ssl_cert_free(s->cert);
    /* Free up if allocated */

#ifndef OPENSSL_NO_TLSEXT
    if (s->tlsext_hostname)
        OPENSSL_free(s->tlsext_hostname);
    if (s->initial_ctx) SSL_CTX_free(s->initial_ctx);
#ifndef OPENSSL_NO_EC
    if (s->tlsext_ecpointformatlist) OPENSSL_free(s->tlsext_ecpointformatlist);
    if (s->tlsext_ellipticcurvelist) OPENSSL_free(s->tlsext_ellipticcurvelist);
#endif /* OPENSSL_NO_EC */
    if (s->tlsext_opaque_prf_input) OPENSSL_free(s->tlsext_opaque_prf_input);
    if (s->tlsext_ocsp_exts)
        sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
                        X509_EXTENSION_free);
    if (s->tlsext_ocsp_ids)
        sk_OCSP_RESPID_pop_free(s->tlsext_ocsp_ids, OCSP_RESPID_free);
    if (s->tlsext_ocsp_resp)
        OPENSSL_free(s->tlsext_ocsp_resp);
#endif

    if (s->client_CA != NULL)
        sk_X509_NAME_pop_free(s->client_CA,X509_NAME_free);

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

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

#ifndef OPENSSL_NO_KRB5
    if (s->kssl_ctx != NULL)
        kssl_ctx_free(s->kssl_ctx);
#endif  /* OPENSSL_NO_KRB5 */

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

        if (s->srtp_profiles)
            sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles);

    OPENSSL_free(s);
    }

void SSL_set_bio(SSL *s,BIO *rbio,BIO *wbio)
    {
    /* If the output buffering BIO is still in place, remove it
     */
    if (s->bbio != NULL)
        {
        if (s->wbio == s->bbio)
            {
            s->wbio=s->wbio->next_bio;
            s->bbio->next_bio=NULL;
            }
        }
    if ((s->rbio != NULL) && (s->rbio != rbio))
        BIO_free_all(s->rbio);
    if ((s->wbio != NULL) && (s->wbio != wbio) && (s->rbio != s->wbio))
        BIO_free_all(s->wbio);
    s->rbio=rbio;
    s->wbio=wbio;
    }

BIO *SSL_get_rbio(const SSL *s)
    { return(s->rbio); }

BIO *SSL_get_wbio(const SSL *s)
    { return(s->wbio); }

int SSL_get_fd(const SSL *s)
    {
    return(SSL_get_rfd(s));
    }

int SSL_get_rfd(const SSL *s)
    {
    int ret= -1;
    BIO *b,*r;

    b=SSL_get_rbio(s);
    r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
    if (r != NULL)
        BIO_get_fd(r,&ret);
    return(ret);
    }

int SSL_get_wfd(const SSL *s)
    {
    int ret= -1;
    BIO *b,*r;

    b=SSL_get_wbio(s);
    r=BIO_find_type(b,BIO_TYPE_DESCRIPTOR);
    if (r != NULL)
        BIO_get_fd(r,&ret);
    return(ret);
    }

#ifndef OPENSSL_NO_SOCK
int SSL_set_fd(SSL *s,int fd)
    {
    int ret=0;
    BIO *bio=NULL;

    bio=BIO_new(BIO_s_socket());

    if (bio == NULL)
        {
        SSLerr(SSL_F_SSL_SET_FD,ERR_R_BUF_LIB);
        goto err;
        }
    BIO_set_fd(bio,fd,BIO_NOCLOSE);
    SSL_set_bio(s,bio,bio);
    ret=1;
err:
    return(ret);
    }

int SSL_set_wfd(SSL *s,int fd)
    {
    int ret=0;
    BIO *bio=NULL;

    if ((s->rbio == NULL) || (BIO_method_type(s->rbio) != BIO_TYPE_SOCKET)
        || ((int)BIO_get_fd(s->rbio,NULL) != fd))
        {
        bio=BIO_new(BIO_s_socket());

        if (bio == NULL)
            { SSLerr(SSL_F_SSL_SET_WFD,ERR_R_BUF_LIB); goto err; }
        BIO_set_fd(bio,fd,BIO_NOCLOSE);
        SSL_set_bio(s,SSL_get_rbio(s),bio);
        }
    else
        SSL_set_bio(s,SSL_get_rbio(s),SSL_get_rbio(s));
    ret=1;
err:
    return(ret);
    }

int SSL_set_rfd(SSL *s,int fd)
    {
    int ret=0;
    BIO *bio=NULL;

    if ((s->wbio == NULL) || (BIO_method_type(s->wbio) != BIO_TYPE_SOCKET)
        || ((int)BIO_get_fd(s->wbio,NULL) != fd))
        {
        bio=BIO_new(BIO_s_socket());

        if (bio == NULL)
            {
            SSLerr(SSL_F_SSL_SET_RFD,ERR_R_BUF_LIB);
            goto err;
            }
        BIO_set_fd(bio,fd,BIO_NOCLOSE);
        SSL_set_bio(s,bio,SSL_get_wbio(s));
        }
    else
        SSL_set_bio(s,SSL_get_wbio(s),SSL_get_wbio(s));
    ret=1;
err:
    return(ret);
    }
#endif


/* return length of latest Finished message we sent, copy to 'buf' */
size_t SSL_get_finished(const SSL *s, void *buf, size_t count)
    {
    size_t ret = 0;
    
    if (s->s3 != NULL)
        {
        ret = s->s3->tmp.finish_md_len;
        if (count > ret)
            count = ret;
        memcpy(buf, s->s3->tmp.finish_md, count);
        }
    return ret;
    }

/* return length of latest Finished message we expected, copy to 'buf' */
size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count)
    {
    size_t ret = 0;
    
    if (s->s3 != NULL)
        {
        ret = s->s3->tmp.peer_finish_md_len;
        if (count > ret)
            count = ret;
        memcpy(buf, s->s3->tmp.peer_finish_md, count);
        }
    return ret;
    }


int SSL_get_verify_mode(const SSL *s)
    {
    return(s->verify_mode);
    }

int SSL_get_verify_depth(const SSL *s)
    {
    return X509_VERIFY_PARAM_get_depth(s->param);
    }

int (*SSL_get_verify_callback(const SSL *s))(int,X509_STORE_CTX *)
    {
    return(s->verify_callback);
    }

int SSL_CTX_get_verify_mode(const SSL_CTX *ctx)
    {
    return(ctx->verify_mode);
    }

int SSL_CTX_get_verify_depth(const SSL_CTX *ctx)
    {
    return X509_VERIFY_PARAM_get_depth(ctx->param);
    }

int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int,X509_STORE_CTX *)
    {
    return(ctx->default_verify_callback);
    }

void SSL_set_verify(SSL *s,int mode,
            int (*callback)(int ok,X509_STORE_CTX *ctx))
    {
    s->verify_mode=mode;
    if (callback != NULL)
        s->verify_callback=callback;
    }

void SSL_set_verify_depth(SSL *s,int depth)
    {
    X509_VERIFY_PARAM_set_depth(s->param, depth);
    }

void SSL_set_read_ahead(SSL *s,int yes)
    {
    s->read_ahead=yes;
    }

int SSL_get_read_ahead(const SSL *s)
    {
    return(s->read_ahead);
    }

int SSL_pending(const SSL *s)
    {
    /* SSL_pending cannot work properly if read-ahead is enabled
     * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)),
     * and it is impossible to fix since SSL_pending cannot report
     * errors that may be observed while scanning the new data.
     * (Note that SSL_pending() is often used as a boolean value,
     * so we'd better not return -1.)
     */
    return(s->method->ssl_pending(s));
    }

X509 *SSL_get_peer_certificate(const SSL *s)
    {
    X509 *r;
    
    if ((s == NULL) || (s->session == NULL))
        r=NULL;
    else
        r=s->session->peer;

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

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

    return(r);
    }

STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s)
    {
    STACK_OF(X509) *r;
    
    if ((s == NULL) || (s->session == NULL) || (s->session->sess_cert == NULL))
        r=NULL;
    else
        r=s->session->sess_cert->cert_chain;

    /* If we are a client, cert_chain includes the peer's own
     * certificate; if we are a server, it does not. */
    
    return(r);
    }

/* Now in theory, since the calling process own 't' it should be safe to
 * modify.  We need to be able to read f without being hassled */
void SSL_copy_session_id(SSL *t,const SSL *f)
    {
    CERT *tmp;

    /* Do we need to to SSL locking? */
    SSL_set_session(t,SSL_get_session(f));

    /* what if we are setup as SSLv2 but want to talk SSLv3 or
     * vice-versa */
    if (t->method != f->method)
        {
        t->method->ssl_free(t); /* cleanup current */
        t->method=f->method;    /* change method */
        t->method->ssl_new(t);  /* setup new */
        }

    tmp=t->cert;
    if (f->cert != NULL)
        {
        CRYPTO_add(&f->cert->references,1,CRYPTO_LOCK_SSL_CERT);
        t->cert=f->cert;
        }
    else
        t->cert=NULL;
    if (tmp != NULL) ssl_cert_free(tmp);
    SSL_set_session_id_context(t,f->sid_ctx,f->sid_ctx_length);
    }

/* Fix this so it checks all the valid key/cert options */
int SSL_CTX_check_private_key(const SSL_CTX *ctx)
    {
    if (    (ctx == NULL) ||
        (ctx->cert == NULL) ||
        (ctx->cert->key->x509 == NULL))
        {
        SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
        return(0);
        }
    if  (ctx->cert->key->privatekey == NULL)
        {
        SSLerr(SSL_F_SSL_CTX_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
        return(0);
        }
    return(X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey));
    }

/* Fix this function so that it takes an optional type parameter */
int SSL_check_private_key(const SSL *ssl)
    {
    if (ssl == NULL)
        {
        SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,ERR_R_PASSED_NULL_PARAMETER);
        return(0);
        }
    if (ssl->cert == NULL)
        {
        SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
        return 0;
        }
    if (ssl->cert->key->x509 == NULL)
        {
        SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_CERTIFICATE_ASSIGNED);
        return(0);
        }
    if (ssl->cert->key->privatekey == NULL)
        {
        SSLerr(SSL_F_SSL_CHECK_PRIVATE_KEY,SSL_R_NO_PRIVATE_KEY_ASSIGNED);
        return(0);
        }
    return(X509_check_private_key(ssl->cert->key->x509,
        ssl->cert->key->privatekey));
    }

int SSL_accept(SSL *s)
    {
    if (s->handshake_func == 0)
        /* Not properly initialized yet */
        SSL_set_accept_state(s);

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

int SSL_connect(SSL *s)
    {
    if (s->handshake_func == 0)
        /* Not properly initialized yet */
        SSL_set_connect_state(s);

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

long SSL_get_default_timeout(const SSL *s)
    {
    return(s->method->get_timeout());
    }

int SSL_read(SSL *s,void *buf,int num)
    {
    if (s->handshake_func == 0)
        {
        SSLerr(SSL_F_SSL_READ, SSL_R_UNINITIALIZED);
        return -1;
        }

    if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
        {
        s->rwstate=SSL_NOTHING;
        return(0);
        }
    return(s->method->ssl_read(s,buf,num));
    }

int SSL_peek(SSL *s,void *buf,int num)
    {
    if (s->handshake_func == 0)
        {
        SSLerr(SSL_F_SSL_PEEK, SSL_R_UNINITIALIZED);
        return -1;
        }

    if (s->shutdown & SSL_RECEIVED_SHUTDOWN)
        {
        return(0);
        }
    return(s->method->ssl_peek(s,buf,num));
    }

int SSL_write(SSL *s,const void *buf,int num)
    {
    if (s->handshake_func == 0)
        {
        SSLerr(SSL_F_SSL_WRITE, SSL_R_UNINITIALIZED);
        return -1;
        }

    if (s->shutdown & SSL_SENT_SHUTDOWN)
        {
        s->rwstate=SSL_NOTHING;
        SSLerr(SSL_F_SSL_WRITE,SSL_R_PROTOCOL_IS_SHUTDOWN);
        return(-1);
        }
    return(s->method->ssl_write(s,buf,num));
    }

int SSL_shutdown(SSL *s)
    {
    /* Note that this function behaves differently from what one might
     * expect.  Return values are 0 for no success (yet),
     * 1 for success; but calling it once is usually not enough,
     * even if blocking I/O is used (see ssl3_shutdown).
     */

    if (s->handshake_func == 0)
        {
        SSLerr(SSL_F_SSL_SHUTDOWN, SSL_R_UNINITIALIZED);
        return -1;
        }

    if ((s != NULL) && !SSL_in_init(s))
        return(s->method->ssl_shutdown(s));
    else
        return(1);
    }

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

    s->new_session=1;

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

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

    s->new_session=0;

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

int SSL_renegotiate_pending(SSL *s)
    {
    /* becomes true when negotiation is requested;
     * false again once a handshake has finished */
    return (s->renegotiate != 0);
    }

long SSL_ctrl(SSL *s,int cmd,long larg,void *parg)
    {
    long l;

    switch (cmd)
        {
    case SSL_CTRL_GET_READ_AHEAD:
        return(s->read_ahead);
    case SSL_CTRL_SET_READ_AHEAD:
        l=s->read_ahead;
        s->read_ahead=larg;
        return(l);

    case SSL_CTRL_SET_MSG_CALLBACK_ARG:
        s->msg_callback_arg = parg;
        return 1;

    case SSL_CTRL_OPTIONS:
        return(s->options|=larg);
    case SSL_CTRL_CLEAR_OPTIONS:
        return(s->options&=~larg);
    case SSL_CTRL_MODE:
        return(s->mode|=larg);
    case SSL_CTRL_CLEAR_MODE:
        return(s->mode &=~larg);
    case SSL_CTRL_GET_MAX_CERT_LIST:
        return(s->max_cert_list);
    case SSL_CTRL_SET_MAX_CERT_LIST:
        l=s->max_cert_list;
        s->max_cert_list=larg;
        return(l);
    case SSL_CTRL_SET_MTU:
#ifndef OPENSSL_NO_DTLS1
        if (larg < (long)dtls1_min_mtu())
            return 0;
#endif

        if (SSL_version(s) == DTLS1_VERSION ||
            SSL_version(s) == DTLS1_BAD_VER)
            {
            s->d1->mtu = larg;
            return larg;
            }
        return 0;
    case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
        if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
            return 0;
        s->max_send_fragment = larg;
        return 1;
    case SSL_CTRL_GET_RI_SUPPORT:
        if (s->s3)
            return s->s3->send_connection_binding;
        else return 0;
    default:
        return(s->method->ssl_ctrl(s,cmd,larg,parg));
        }
    }

long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
    {
    switch(cmd)
        {
    case SSL_CTRL_SET_MSG_CALLBACK:
        s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
        return 1;
        
    default:
        return(s->method->ssl_callback_ctrl(s,cmd,fp));
        }
    }

LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx)
    {
    return ctx->sessions;
    }

long SSL_CTX_ctrl(SSL_CTX *ctx,int cmd,long larg,void *parg)
    {
    long l;

    switch (cmd)
        {
    case SSL_CTRL_GET_READ_AHEAD:
        return(ctx->read_ahead);
    case SSL_CTRL_SET_READ_AHEAD:
        l=ctx->read_ahead;
        ctx->read_ahead=larg;
        return(l);
        
    case SSL_CTRL_SET_MSG_CALLBACK_ARG:
        ctx->msg_callback_arg = parg;
        return 1;

    case SSL_CTRL_GET_MAX_CERT_LIST:
        return(ctx->max_cert_list);
    case SSL_CTRL_SET_MAX_CERT_LIST:
        l=ctx->max_cert_list;
        ctx->max_cert_list=larg;
        return(l);

    case SSL_CTRL_SET_SESS_CACHE_SIZE:
        l=ctx->session_cache_size;
        ctx->session_cache_size=larg;
        return(l);
    case SSL_CTRL_GET_SESS_CACHE_SIZE:
        return(ctx->session_cache_size);
    case SSL_CTRL_SET_SESS_CACHE_MODE:
        l=ctx->session_cache_mode;
        ctx->session_cache_mode=larg;
        return(l);
    case SSL_CTRL_GET_SESS_CACHE_MODE:
        return(ctx->session_cache_mode);

    case SSL_CTRL_SESS_NUMBER:
        return(lh_SSL_SESSION_num_items(ctx->sessions));
    case SSL_CTRL_SESS_CONNECT:
        return(ctx->stats.sess_connect);
    case SSL_CTRL_SESS_CONNECT_GOOD:
        return(ctx->stats.sess_connect_good);
    case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
        return(ctx->stats.sess_connect_renegotiate);
    case SSL_CTRL_SESS_ACCEPT:
        return(ctx->stats.sess_accept);
    case SSL_CTRL_SESS_ACCEPT_GOOD:
        return(ctx->stats.sess_accept_good);
    case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
        return(ctx->stats.sess_accept_renegotiate);
    case SSL_CTRL_SESS_HIT:
        return(ctx->stats.sess_hit);
    case SSL_CTRL_SESS_CB_HIT:
        return(ctx->stats.sess_cb_hit);
    case SSL_CTRL_SESS_MISSES:
        return(ctx->stats.sess_miss);
    case SSL_CTRL_SESS_TIMEOUTS:
        return(ctx->stats.sess_timeout);
    case SSL_CTRL_SESS_CACHE_FULL:
        return(ctx->stats.sess_cache_full);
    case SSL_CTRL_OPTIONS:
        return(ctx->options|=larg);
    case SSL_CTRL_CLEAR_OPTIONS:
        return(ctx->options&=~larg);
    case SSL_CTRL_MODE:
        return(ctx->mode|=larg);
    case SSL_CTRL_CLEAR_MODE:
        return(ctx->mode&=~larg);
    case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
        if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
            return 0;
        ctx->max_send_fragment = larg;
        return 1;
    default:
        return(ctx->method->ssl_ctx_ctrl(ctx,cmd,larg,parg));
        }
    }

long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
    {
    switch(cmd)
        {
    case SSL_CTRL_SET_MSG_CALLBACK:
        ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp);
        return 1;

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

int ssl_cipher_id_cmp(const SSL_CIPHER *a, const SSL_CIPHER *b)
    {
    long l;

    l=a->id-b->id;
    if (l == 0L)
        return(0);
    else
        return((l > 0)?1:-1);
    }

int ssl_cipher_ptr_id_cmp(const SSL_CIPHER * const *ap,
            const SSL_CIPHER * const *bp)
    {
    long l;

    l=(*ap)->id-(*bp)->id;
    if (l == 0L)
        return(0);
    else
        return((l > 0)?1:-1);
    }

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);
    }

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);
    }

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);
    }

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;
    }

int SSL_set_cipher_list(SSL *s,const char *str)
    {
    STACK_OF(SSL_CIPHER) *sk;
    
    sk=ssl_create_cipher_list(s->ctx->method,&s->cipher_list,
        &s->cipher_list_by_id,str);
    /* see comment in SSL_CTX_set_cipher_list */
    if (sk == NULL)
        return 0;
    else if (sk_SSL_CIPHER_num(sk) == 0)
        {
        SSLerr(SSL_F_SSL_SET_CIPHER_LIST, SSL_R_NO_CIPHER_MATCH);
        return 0;
        }
    return 1;
    }

/* works well for SSLv2, not so good for SSLv3 */
char *SSL_get_shared_ciphers(const SSL *s,char *buf,int len)
    {
    char *p;
    STACK_OF(SSL_CIPHER) *sk;
    SSL_CIPHER *c;
    int i;

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

    p=buf;
    sk=s->session->ciphers;
    for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
        {
        int n;

        c=sk_SSL_CIPHER_value(sk,i);
        n=strlen(c->name);
        if (n+1 > len)
            {
            if (p != buf)
                --p;
            *p='\0';
            return buf;
            }
        strcpy(p,c->name);
        p+=n;
        *(p++)=':';
        len-=n+1;
        }
    p[-1]='\0';
    return(buf);
    }

int ssl_cipher_list_to_bytes(SSL *s,STACK_OF(SSL_CIPHER) *sk,unsigned char *p,
                 int (*put_cb)(const SSL_CIPHER *, unsigned char *))
    {
    int i,j=0;
    SSL_CIPHER *c;
    unsigned char *q;
#ifndef OPENSSL_NO_KRB5
    int nokrb5 = !kssl_tgt_is_available(s->kssl_ctx);
#endif /* OPENSSL_NO_KRB5 */

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

    for (i=0; i<sk_SSL_CIPHER_num(sk); i++)
        {
        c=sk_SSL_CIPHER_value(sk,i);
        /* Skip TLS v1.2 only ciphersuites if lower than v1.2 */
        if ((c->algorithm_ssl & SSL_TLSV1_2) && 
            (TLS1_get_client_version(s) < TLS1_2_VERSION))
            continue;
#ifndef OPENSSL_NO_KRB5
        if (((c->algorithm_mkey & SSL_kKRB5) || (c->algorithm_auth & SSL_aKRB5)) &&
            nokrb5)
            continue;
#endif /* OPENSSL_NO_KRB5 */
#ifndef OPENSSL_NO_PSK
        /* with PSK there must be client callback set */
        if (((c->algorithm_mkey & SSL_kPSK) || (c->algorithm_auth & SSL_aPSK)) &&
            s->psk_client_callback == NULL)
            continue;
#endif /* OPENSSL_NO_PSK */
        j = put_cb ? put_cb(c,p) : ssl_put_cipher_by_char(s,c,p);
        p+=j;
        }
    /* If p == q, no ciphers and caller indicates an error. Otherwise
     * add SCSV if not renegotiating.
     */
    if (p != q && !s->renegotiate)
        {
        static SSL_CIPHER scsv =
            {
            0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
            };
        j = put_cb ? put_cb(&scsv,p) : ssl_put_cipher_by_char(s,&scsv,p);
        p+=j;
#ifdef OPENSSL_RI_DEBUG
        fprintf(stderr, "SCSV sent by client\n");
#endif
        }

    return(p-q);
    }

STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s,unsigned char *p,int num,
                           STACK_OF(SSL_CIPHER) **skp)
    {
    const SSL_CIPHER *c;
    STACK_OF(SSL_CIPHER) *sk;
    int i,n;
    if (s->s3)
        s->s3->send_connection_binding = 0;

    n=ssl_put_cipher_by_char(s,NULL,NULL);
    if ((num%n) != 0)
        {
        SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST);
        return(NULL);
        }
    if ((skp == NULL) || (*skp == NULL))
        sk=sk_SSL_CIPHER_new_null(); /* change perhaps later */
    else
        {
        sk= *skp;
        sk_SSL_CIPHER_zero(sk);
        }

    for (i=0; i<num; i+=n)
        {
        /* Check for SCSV */
        if (s->s3 && (n != 3 || !p[0]) &&
            (p[n-2] == ((SSL3_CK_SCSV >> 8) & 0xff)) &&
            (p[n-1] == (SSL3_CK_SCSV & 0xff)))
            {
            /* SCSV fatal if renegotiating */
            if (s->renegotiate)
                {
                SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING);
                ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 
                goto err;
                }
            s->s3->send_connection_binding = 1;
            p += n;
#ifdef OPENSSL_RI_DEBUG
            fprintf(stderr, "SCSV received by server\n");
#endif
            continue;
            }

        c=ssl_get_cipher_by_char(s,p);
        p+=n;
        if (c != NULL)
            {
            if (!sk_SSL_CIPHER_push(sk,c))
                {
                SSLerr(SSL_F_SSL_BYTES_TO_CIPHER_LIST,ERR_R_MALLOC_FAILURE);
                goto err;
                }
            }
        }

    if (skp != NULL)
        *skp=sk;
    return(sk);
err:
    if ((skp == NULL) || (*skp == NULL))
        sk_SSL_CIPHER_free(sk);
    return(NULL);
    }


#ifndef OPENSSL_NO_TLSEXT

const char *SSL_get_servername(const SSL *s, const int type)
    {
    if (type != TLSEXT_NAMETYPE_host_name)
        return NULL;

    return s->session && !s->tlsext_hostname ?
        s->session->tlsext_hostname :
        s->tlsext_hostname;
    }

int SSL_get_servername_type(const SSL *s)
    {
    if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname))
        return TLSEXT_NAMETYPE_host_name;
    return -1;
    }

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

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

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

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

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

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

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

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

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

static unsigned long ssl_session_hash(const SSL_SESSION *a)
    {
    unsigned long l;

    l=(unsigned long)
        ((unsigned int) a->session_id[0]     )|
        ((unsigned int) a->session_id[1]<< 8L)|
        ((unsigned long)a->session_id[2]<<16L)|
        ((unsigned long)a->session_id[3]<<24L);
    return(l);
    }

/* NB: If this function (or indeed the hash function which uses a sort of
 * coarser function than this one) is changed, ensure
 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
 * able to construct an SSL_SESSION that will collide with any existing session
 * with a matching session ID. */
static int ssl_session_cmp(const SSL_SESSION *a,const SSL_SESSION *b)
    {
    if (a->ssl_version != b->ssl_version)
        return(1);
    if (a->session_id_length != b->session_id_length)
        return(1);
    return(memcmp(a->session_id,b->session_id,a->session_id_length));
    }

/* These wrapper functions should remain rather than redeclaring
 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
 * variable. The reason is that the functions aren't static, they're exposed via
 * ssl.h. */
static IMPLEMENT_LHASH_HASH_FN(ssl_session, SSL_SESSION)
static IMPLEMENT_LHASH_COMP_FN(ssl_session, SSL_SESSION)

SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth)
    {
    SSL_CTX *ret=NULL;

    if (meth == NULL)
        {
        SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_NULL_SSL_METHOD_PASSED);
        return(NULL);
        }

#ifdef OPENSSL_FIPS
    if (FIPS_mode() && (meth->version < TLS1_VERSION))  
        {
        SSLerr(SSL_F_SSL_CTX_NEW, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
        return NULL;
        }
#endif

    if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0)
        {
        SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
        goto err;
        }
    ret=(SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX));
    if (ret == NULL)
        goto err;

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

    ret->method=meth;

    ret->cert_store=NULL;
    ret->session_cache_mode=SSL_SESS_CACHE_SERVER;
    ret->session_cache_size=SSL_SESSION_CACHE_MAX_SIZE_DEFAULT;
    ret->session_cache_head=NULL;
    ret->session_cache_tail=NULL;

    /* We take the system default */
    ret->session_timeout=meth->get_timeout();

    ret->new_session_cb=0;
    ret->remove_session_cb=0;
    ret->get_session_cb=0;
    ret->generate_session_id=0;

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

    ret->references=1;
    ret->quiet_shutdown=0;

/*  ret->cipher=NULL;*/
/*  ret->s2->challenge=NULL;
    ret->master_key=NULL;
    ret->key_arg=NULL;
    ret->s2->conn_id=NULL; */

    ret->info_callback=NULL;

    ret->app_verify_callback=0;
    ret->app_verify_arg=NULL;

    ret->max_cert_list=SSL_MAX_CERT_LIST_DEFAULT;
    ret->read_ahead=0;
    ret->msg_callback=0;
    ret->msg_callback_arg=NULL;
    ret->verify_mode=SSL_VERIFY_NONE;
#if 0
    ret->verify_depth=-1; /* Don't impose a limit (but x509_lu.c does) */
#endif
    ret->sid_ctx_length=0;
    ret->default_verify_callback=NULL;
    if ((ret->cert=ssl_cert_new()) == NULL)
        goto err;

    ret->default_passwd_callback=0;
    ret->default_passwd_callback_userdata=NULL;
    ret->client_cert_cb=0;
    ret->app_gen_cookie_cb=0;
    ret->app_verify_cookie_cb=0;

    ret->sessions=lh_SSL_SESSION_new();
    if (ret->sessions == NULL) goto err;
    ret->cert_store=X509_STORE_new();
    if (ret->cert_store == NULL) goto err;

    ssl_create_cipher_list(ret->method,
        &ret->cipher_list,&ret->cipher_list_by_id,
        meth->version == SSL2_VERSION ? "SSLv2" : SSL_DEFAULT_CIPHER_LIST);
    if (ret->cipher_list == NULL
        || sk_SSL_CIPHER_num(ret->cipher_list) <= 0)
        {
        SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_LIBRARY_HAS_NO_CIPHERS);
        goto err2;
        }

    ret->param = X509_VERIFY_PARAM_new();
    if (!ret->param)
        goto err;

    if ((ret->rsa_md5=EVP_get_digestbyname("ssl2-md5")) == NULL)
        {
        SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES);
        goto err2;
        }
    if ((ret->md5=EVP_get_digestbyname("ssl3-md5")) == NULL)
        {
        SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES);
        goto err2;
        }
    if ((ret->sha1=EVP_get_digestbyname("ssl3-sha1")) == NULL)
        {
        SSLerr(SSL_F_SSL_CTX_NEW,SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES);
        goto err2;
        }

    if ((ret->client_CA=sk_X509_NAME_new_null()) == NULL)
        goto err;

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

    ret->extra_certs=NULL;
    ret->comp_methods=SSL_COMP_get_compression_methods();

    ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;

#ifndef OPENSSL_NO_TLSEXT
    ret->tlsext_servername_callback = 0;
    ret->tlsext_servername_arg = NULL;
    /* Setup RFC4507 ticket keys */
    if ((RAND_pseudo_bytes(ret->tlsext_tick_key_name, 16) <= 0)
        || (RAND_bytes(ret->tlsext_tick_hmac_key, 16) <= 0)
        || (RAND_bytes(ret->tlsext_tick_aes_key, 16) <= 0))
        ret->options |= SSL_OP_NO_TICKET;

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

# ifndef OPENSSL_NO_NEXTPROTONEG
    ret->next_protos_advertised_cb = 0;
    ret->next_proto_select_cb = 0;
# endif
#endif
#ifndef OPENSSL_NO_PSK
    ret->psk_identity_hint=NULL;
    ret->psk_client_callback=NULL;
    ret->psk_server_callback=NULL;
#endif
#ifndef OPENSSL_NO_SRP
    SSL_CTX_SRP_CTX_init(ret);
#endif
#ifndef OPENSSL_NO_BUF_FREELISTS
    ret->freelist_max_len = SSL_MAX_BUF_FREELIST_LEN_DEFAULT;
    ret->rbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
    if (!ret->rbuf_freelist)
        goto err;
    ret->rbuf_freelist->chunklen = 0;
    ret->rbuf_freelist->len = 0;
    ret->rbuf_freelist->head = NULL;
    ret->wbuf_freelist = OPENSSL_malloc(sizeof(SSL3_BUF_FREELIST));
    if (!ret->wbuf_freelist)
        {
        OPENSSL_free(ret->rbuf_freelist);
        goto err;
        }
    ret->wbuf_freelist->chunklen = 0;
    ret->wbuf_freelist->len = 0;
    ret->wbuf_freelist->head = NULL;
#endif
#ifndef OPENSSL_NO_ENGINE
    ret->client_cert_engine = NULL;
#ifdef OPENSSL_SSL_CLIENT_ENGINE_AUTO
#define eng_strx(x) #x
#define eng_str(x)  eng_strx(x)
    /* Use specific client engine automatically... ignore errors */
    {
    ENGINE *eng;
    eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
    if (!eng)
        {
        ERR_clear_error();
        ENGINE_load_builtin_engines();
        eng = ENGINE_by_id(eng_str(OPENSSL_SSL_CLIENT_ENGINE_AUTO));
        }
    if (!eng || !SSL_CTX_set_client_cert_engine(ret, eng))
        ERR_clear_error();
    }
#endif
#endif
    /* Default is to connect to non-RI servers. When RI is more widely
     * deployed might change this.
     */
    ret->options |= SSL_OP_LEGACY_SERVER_CONNECT;

    return(ret);
err:
    SSLerr(SSL_F_SSL_CTX_NEW,ERR_R_MALLOC_FAILURE);
err2:
    if (ret != NULL) SSL_CTX_free(ret);
    return(NULL);
    }

#if 0
static void SSL_COMP_free(SSL_COMP *comp)
    { OPENSSL_free(comp); }
#endif

#ifndef OPENSSL_NO_BUF_FREELISTS
static void
ssl_buf_freelist_free(SSL3_BUF_FREELIST *list)
    {
    SSL3_BUF_FREELIST_ENTRY *ent, *next;
    for (ent = list->head; ent; ent = next)
        {
        next = ent->next;
        OPENSSL_free(ent);
        }
    OPENSSL_free(list);
    }
#endif

void SSL_CTX_free(SSL_CTX *a)
    {
    int i;

    if (a == NULL) return;

    i=CRYPTO_add(&a->references,-1,CRYPTO_LOCK_SSL_CTX);
#ifdef REF_PRINT
    REF_PRINT("SSL_CTX",a);
#endif
    if (i > 0) return;
#ifdef REF_CHECK
    if (i < 0)
        {
        fprintf(stderr,"SSL_CTX_free, bad reference count\n");
        abort(); /* ok */
        }
#endif

    if (a->param)
        X509_VERIFY_PARAM_free(a->param);

    /*
     * Free internal session cache. However: the remove_cb() may reference
     * the ex_data of SSL_CTX, thus the ex_data store can only be removed
     * after the sessions were flushed.
     * As the ex_data handling routines might also touch the session cache,
     * the most secure solution seems to be: empty (flush) the cache, then
     * free ex_data, then finally free the cache.
     * (See ticket [openssl.org #212].)
     */
    if (a->sessions != NULL)
        SSL_CTX_flush_sessions(a,0);

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

    if (a->sessions != NULL)
        lh_SSL_SESSION_free(a->sessions);

    if (a->cert_store != NULL)
        X509_STORE_free(a->cert_store);
    if (a->cipher_list != NULL)
        sk_SSL_CIPHER_free(a->cipher_list);
    if (a->cipher_list_by_id != NULL)
        sk_SSL_CIPHER_free(a->cipher_list_by_id);
    if (a->cert != NULL)
        ssl_cert_free(a->cert);
    if (a->client_CA != NULL)
        sk_X509_NAME_pop_free(a->client_CA,X509_NAME_free);
    if (a->extra_certs != NULL)
        sk_X509_pop_free(a->extra_certs,X509_free);
#if 0 /* This should never be done, since it removes a global database */
    if (a->comp_methods != NULL)
        sk_SSL_COMP_pop_free(a->comp_methods,SSL_COMP_free);
#else
    a->comp_methods = NULL;
#endif

        if (a->srtp_profiles)
                sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles);

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

#ifndef OPENSSL_NO_BUF_FREELISTS
    if (a->wbuf_freelist)
        ssl_buf_freelist_free(a->wbuf_freelist);
    if (a->rbuf_freelist)
        ssl_buf_freelist_free(a->rbuf_freelist);
#endif

    OPENSSL_free(a);
    }

void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb)
    {
    ctx->default_passwd_callback=cb;
    }

void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx,void *u)
    {
    ctx->default_passwd_callback_userdata=u;
    }

void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *,void *), void *arg)
    {
    ctx->app_verify_callback=cb;
    ctx->app_verify_arg=arg;
    }

void SSL_CTX_set_verify(SSL_CTX *ctx,int mode,int (*cb)(int, X509_STORE_CTX *))
    {
    ctx->verify_mode=mode;
    ctx->default_verify_callback=cb;
    }

void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth)
    {
    X509_VERIFY_PARAM_set_depth(ctx->param, depth);
    }

void ssl_set_cert_masks(CERT *c, const SSL_CIPHER *cipher)
    {
    CERT_PKEY *cpk;
    int rsa_enc,rsa_tmp,rsa_sign,dh_tmp,dh_rsa,dh_dsa,dsa_sign;
    int rsa_enc_export,dh_rsa_export,dh_dsa_export;
    int rsa_tmp_export,dh_tmp_export,kl;
    unsigned long mask_k,mask_a,emask_k,emask_a;
    int have_ecc_cert, ecdh_ok, ecdsa_ok, ecc_pkey_size;
#ifndef OPENSSL_NO_ECDH
    int have_ecdh_tmp;
#endif
    X509 *x = NULL;
    EVP_PKEY *ecc_pkey = NULL;
    int signature_nid = 0, pk_nid = 0, md_nid = 0;

    if (c == NULL) return;

    kl=SSL_C_EXPORT_PKEYLENGTH(cipher);

#ifndef OPENSSL_NO_RSA
    rsa_tmp=(c->rsa_tmp != NULL || c->rsa_tmp_cb != NULL);
    rsa_tmp_export=(c->rsa_tmp_cb != NULL ||
        (rsa_tmp && RSA_size(c->rsa_tmp)*8 <= kl));
#else
    rsa_tmp=rsa_tmp_export=0;
#endif
#ifndef OPENSSL_NO_DH
    dh_tmp=(c->dh_tmp != NULL || c->dh_tmp_cb != NULL);
    dh_tmp_export=(c->dh_tmp_cb != NULL ||
        (dh_tmp && DH_size(c->dh_tmp)*8 <= kl));
#else
    dh_tmp=dh_tmp_export=0;
#endif

#ifndef OPENSSL_NO_ECDH
    have_ecdh_tmp=(c->ecdh_tmp != NULL || c->ecdh_tmp_cb != NULL);
#endif
    cpk= &(c->pkeys[SSL_PKEY_RSA_ENC]);
    rsa_enc= (cpk->x509 != NULL && cpk->privatekey != NULL);
    rsa_enc_export=(rsa_enc && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
    cpk= &(c->pkeys[SSL_PKEY_RSA_SIGN]);
    rsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
    cpk= &(c->pkeys[SSL_PKEY_DSA_SIGN]);
    dsa_sign=(cpk->x509 != NULL && cpk->privatekey != NULL);
    cpk= &(c->pkeys[SSL_PKEY_DH_RSA]);
    dh_rsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
    dh_rsa_export=(dh_rsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
    cpk= &(c->pkeys[SSL_PKEY_DH_DSA]);
/* FIX THIS EAY EAY EAY */
    dh_dsa=  (cpk->x509 != NULL && cpk->privatekey != NULL);
    dh_dsa_export=(dh_dsa && EVP_PKEY_size(cpk->privatekey)*8 <= kl);
    cpk= &(c->pkeys[SSL_PKEY_ECC]);
    have_ecc_cert= (cpk->x509 != NULL && cpk->privatekey != NULL);
    mask_k=0;
    mask_a=0;
    emask_k=0;
    emask_a=0;

    

#ifdef CIPHER_DEBUG
    printf("rt=%d rte=%d dht=%d ecdht=%d re=%d ree=%d rs=%d ds=%d dhr=%d dhd=%d\n",
            rsa_tmp,rsa_tmp_export,dh_tmp,have_ecdh_tmp,
        rsa_enc,rsa_enc_export,rsa_sign,dsa_sign,dh_rsa,dh_dsa);
#endif
    
    cpk = &(c->pkeys[SSL_PKEY_GOST01]);
    if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
        mask_k |= SSL_kGOST;
        mask_a |= SSL_aGOST01;
    }
    cpk = &(c->pkeys[SSL_PKEY_GOST94]);
    if (cpk->x509 != NULL && cpk->privatekey !=NULL) {
        mask_k |= SSL_kGOST;
        mask_a |= SSL_aGOST94;
    }

    if (rsa_enc || (rsa_tmp && rsa_sign))
        mask_k|=SSL_kRSA;
    if (rsa_enc_export || (rsa_tmp_export && (rsa_sign || rsa_enc)))
        emask_k|=SSL_kRSA;

#if 0
    /* The match needs to be both kEDH and aRSA or aDSA, so don't worry */
    if (    (dh_tmp || dh_rsa || dh_dsa) &&
        (rsa_enc || rsa_sign || dsa_sign))
        mask_k|=SSL_kEDH;
    if ((dh_tmp_export || dh_rsa_export || dh_dsa_export) &&
        (rsa_enc || rsa_sign || dsa_sign))
        emask_k|=SSL_kEDH;
#endif

    if (dh_tmp_export)
        emask_k|=SSL_kEDH;

    if (dh_tmp)
        mask_k|=SSL_kEDH;

    if (dh_rsa) mask_k|=SSL_kDHr;
    if (dh_rsa_export) emask_k|=SSL_kDHr;

    if (dh_dsa) mask_k|=SSL_kDHd;
    if (dh_dsa_export) emask_k|=SSL_kDHd;

    if (rsa_enc || rsa_sign)
        {
        mask_a|=SSL_aRSA;
        emask_a|=SSL_aRSA;
        }

    if (dsa_sign)
        {
        mask_a|=SSL_aDSS;
        emask_a|=SSL_aDSS;
        }

    mask_a|=SSL_aNULL;
    emask_a|=SSL_aNULL;

#ifndef OPENSSL_NO_KRB5
    mask_k|=SSL_kKRB5;
    mask_a|=SSL_aKRB5;
    emask_k|=SSL_kKRB5;
    emask_a|=SSL_aKRB5;
#endif

    /* An ECC certificate may be usable for ECDH and/or
     * ECDSA cipher suites depending on the key usage extension.
     */
    if (have_ecc_cert)
        {
        /* This call populates extension flags (ex_flags) */
        x = (c->pkeys[SSL_PKEY_ECC]).x509;
        X509_check_purpose(x, -1, 0);
        ecdh_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
            (x->ex_kusage & X509v3_KU_KEY_AGREEMENT) : 1;
        ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ?
            (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1;
        ecc_pkey = X509_get_pubkey(x);
        ecc_pkey_size = (ecc_pkey != NULL) ?
            EVP_PKEY_bits(ecc_pkey) : 0;
        EVP_PKEY_free(ecc_pkey);
        if ((x->sig_alg) && (x->sig_alg->algorithm))
            {
            signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
            OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
            }
#ifndef OPENSSL_NO_ECDH
        if (ecdh_ok)
            {

            if (pk_nid == NID_rsaEncryption || pk_nid == NID_rsa)
                {
                mask_k|=SSL_kECDHr;
                mask_a|=SSL_aECDH;
                if (ecc_pkey_size <= 163)
                    {
                    emask_k|=SSL_kECDHr;
                    emask_a|=SSL_aECDH;
                    }
                }

            if (pk_nid == NID_X9_62_id_ecPublicKey)
                {
                mask_k|=SSL_kECDHe;
                mask_a|=SSL_aECDH;
                if (ecc_pkey_size <= 163)
                    {
                    emask_k|=SSL_kECDHe;
                    emask_a|=SSL_aECDH;
                    }
                }
            }
#endif
#ifndef OPENSSL_NO_ECDSA
        if (ecdsa_ok)
            {
            mask_a|=SSL_aECDSA;
            emask_a|=SSL_aECDSA;
            }
#endif
        }

#ifndef OPENSSL_NO_ECDH
    if (have_ecdh_tmp)
        {
        mask_k|=SSL_kEECDH;
        emask_k|=SSL_kEECDH;
        }
#endif

#ifndef OPENSSL_NO_PSK
    mask_k |= SSL_kPSK;
    mask_a |= SSL_aPSK;
    emask_k |= SSL_kPSK;
    emask_a |= SSL_aPSK;
#endif

    c->mask_k=mask_k;
    c->mask_a=mask_a;
    c->export_mask_k=emask_k;
    c->export_mask_a=emask_a;
    c->valid=1;
    }

/* This handy macro borrowed from crypto/x509v3/v3_purp.c */
#define ku_reject(x, usage) \
    (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage)))

#ifndef OPENSSL_NO_EC

int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s)
    {
    unsigned long alg_k, alg_a;
    EVP_PKEY *pkey = NULL;
    int keysize = 0;
    int signature_nid = 0, md_nid = 0, pk_nid = 0;
    const SSL_CIPHER *cs = s->s3->tmp.new_cipher;

    alg_k = cs->algorithm_mkey;
    alg_a = cs->algorithm_auth;

    if (SSL_C_IS_EXPORT(cs))
        {
        /* ECDH key length in export ciphers must be <= 163 bits */
        pkey = X509_get_pubkey(x);
        if (pkey == NULL) return 0;
        keysize = EVP_PKEY_bits(pkey);
        EVP_PKEY_free(pkey);
        if (keysize > 163) return 0;
        }

    /* This call populates the ex_flags field correctly */
    X509_check_purpose(x, -1, 0);
    if ((x->sig_alg) && (x->sig_alg->algorithm))
        {
        signature_nid = OBJ_obj2nid(x->sig_alg->algorithm);
        OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid);
        }
    if (alg_k & SSL_kECDHe || alg_k & SSL_kECDHr)
        {
        /* key usage, if present, must allow key agreement */
        if (ku_reject(x, X509v3_KU_KEY_AGREEMENT))
            {
            SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT);
            return 0;
            }
        if ((alg_k & SSL_kECDHe) && TLS1_get_version(s) < TLS1_2_VERSION)
            {
            /* signature alg must be ECDSA */
            if (pk_nid != NID_X9_62_id_ecPublicKey)
                {
                SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE);
                return 0;
                }
            }
        if ((alg_k & SSL_kECDHr) && TLS1_get_version(s) < TLS1_2_VERSION)
            {
            /* signature alg must be RSA */

            if (pk_nid != NID_rsaEncryption && pk_nid != NID_rsa)
                {
                SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE);
                return 0;
                }
            }
        }
    if (alg_a & SSL_aECDSA)
        {
        /* key usage, if present, must allow signing */
        if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE))
            {
            SSLerr(SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
            return 0;
            }
        }

    return 1;  /* all checks are ok */
    }

#endif

/* THIS NEEDS CLEANING UP */
X509 *ssl_get_server_send_cert(SSL *s)
    {
    unsigned long alg_k,alg_a;
    CERT *c;
    int i;

    c=s->cert;
    ssl_set_cert_masks(c, s->s3->tmp.new_cipher);
    
    alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
    alg_a = s->s3->tmp.new_cipher->algorithm_auth;

    if (alg_k & (SSL_kECDHr|SSL_kECDHe))
        {
        /* we don't need to look at SSL_kEECDH
         * since no certificate is needed for
         * anon ECDH and for authenticated
         * EECDH, the check for the auth
         * algorithm will set i correctly
         * NOTE: For ECDH-RSA, we need an ECC
         * not an RSA cert but for EECDH-RSA
         * we need an RSA cert. Placing the
         * checks for SSL_kECDH before RSA
         * checks ensures the correct cert is chosen.
         */
        i=SSL_PKEY_ECC;
        }
    else if (alg_a & SSL_aECDSA)
        {
        i=SSL_PKEY_ECC;
        }
    else if (alg_k & SSL_kDHr)
        i=SSL_PKEY_DH_RSA;
    else if (alg_k & SSL_kDHd)
        i=SSL_PKEY_DH_DSA;
    else if (alg_a & SSL_aDSS)
        i=SSL_PKEY_DSA_SIGN;
    else if (alg_a & SSL_aRSA)
        {
        if (c->pkeys[SSL_PKEY_RSA_ENC].x509 == NULL)
            i=SSL_PKEY_RSA_SIGN;
        else
            i=SSL_PKEY_RSA_ENC;
        }
    else if (alg_a & SSL_aKRB5)
        {
        /* VRS something else here? */
        return(NULL);
        }
    else if (alg_a & SSL_aGOST94) 
        i=SSL_PKEY_GOST94;
    else if (alg_a & SSL_aGOST01)
        i=SSL_PKEY_GOST01;
    else /* if (alg_a & SSL_aNULL) */
        {
        SSLerr(SSL_F_SSL_GET_SERVER_SEND_CERT,ERR_R_INTERNAL_ERROR);
        return(NULL);
        }
    if (c->pkeys[i].x509 == NULL) return(NULL);

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

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

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

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

void ssl_update_cache(SSL *s,int mode)
    {
    int i;

    /* If the session_id_length is 0, we are not supposed to cache it,
     * and it would be rather hard to do anyway :-) */
    if (s->session->session_id_length == 0) return;

    i=s->session_ctx->session_cache_mode;
    if ((i & mode) && (!s->hit)
        && ((i & SSL_SESS_CACHE_NO_INTERNAL_STORE)
            || SSL_CTX_add_session(s->session_ctx,s->session))
        && (s->session_ctx->new_session_cb != NULL))
        {
        CRYPTO_add(&s->session->references,1,CRYPTO_LOCK_SSL_SESSION);
        if (!s->session_ctx->new_session_cb(s,s->session))
            SSL_SESSION_free(s->session);
        }

    /* auto flush every 255 connections */
    if ((!(i & SSL_SESS_CACHE_NO_AUTO_CLEAR)) &&
        ((i & mode) == mode))
        {
        if (  (((mode & SSL_SESS_CACHE_CLIENT)
            ?s->session_ctx->stats.sess_connect_good
            :s->session_ctx->stats.sess_accept_good) & 0xff) == 0xff)
            {
            SSL_CTX_flush_sessions(s->session_ctx,(unsigned long)time(NULL));
            }
        }
    }

const SSL_METHOD *SSL_get_ssl_method(SSL *s)
    {
    return(s->method);
    }

int SSL_set_ssl_method(SSL *s, const SSL_METHOD *meth)
    {
    int conn= -1;
    int ret=1;

    if (s->method != meth)
        {
        if (s->handshake_func != NULL)
            conn=(s->handshake_func == s->method->ssl_connect);

        if (s->method->version == meth->version)
            s->method=meth;
        else
            {
            s->method->ssl_free(s);
            s->method=meth;
            ret=s->method->ssl_new(s);
            }

        if (conn == 1)
            s->handshake_func=meth->ssl_connect;
        else if (conn == 0)
            s->handshake_func=meth->ssl_accept;
        }
    return(ret);
    }

int SSL_get_error(const SSL *s,int i)
    {
    int reason;
    unsigned long l;
    BIO *bio;

    if (i > 0) return(SSL_ERROR_NONE);

    /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake
     * etc, where we do encode the error */
    if ((l=ERR_peek_error()) != 0)
        {
        if (ERR_GET_LIB(l) == ERR_LIB_SYS)
            return(SSL_ERROR_SYSCALL);
        else
            return(SSL_ERROR_SSL);
        }

    if ((i < 0) && SSL_want_read(s))
        {
        bio=SSL_get_rbio(s);
        if (BIO_should_read(bio))
            return(SSL_ERROR_WANT_READ);
        else if (BIO_should_write(bio))
            /* This one doesn't make too much sense ... We never try
             * to write to the rbio, and an application program where
             * rbio and wbio are separate couldn't even know what it
             * should wait for.
             * However if we ever set s->rwstate incorrectly
             * (so that we have SSL_want_read(s) instead of
             * SSL_want_write(s)) and rbio and wbio *are* the same,
             * this test works around that bug; so it might be safer
             * to keep it. */
            return(SSL_ERROR_WANT_WRITE);
        else if (BIO_should_io_special(bio))
            {
            reason=BIO_get_retry_reason(bio);
            if (reason == BIO_RR_CONNECT)
                return(SSL_ERROR_WANT_CONNECT);
            else if (reason == BIO_RR_ACCEPT)
                return(SSL_ERROR_WANT_ACCEPT);
            else
                return(SSL_ERROR_SYSCALL); /* unknown */
            }
        }

    if ((i < 0) && SSL_want_write(s))
        {
        bio=SSL_get_wbio(s);
        if (BIO_should_write(bio))
            return(SSL_ERROR_WANT_WRITE);
        else if (BIO_should_read(bio))
            /* See above (SSL_want_read(s) with BIO_should_write(bio)) */
            return(SSL_ERROR_WANT_READ);
        else if (BIO_should_io_special(bio))
            {
            reason=BIO_get_retry_reason(bio);
            if (reason == BIO_RR_CONNECT)
                return(SSL_ERROR_WANT_CONNECT);
            else if (reason == BIO_RR_ACCEPT)
                return(SSL_ERROR_WANT_ACCEPT);
            else
                return(SSL_ERROR_SYSCALL);
            }
        }
    if ((i < 0) && SSL_want_x509_lookup(s))
        {
        return(SSL_ERROR_WANT_X509_LOOKUP);
        }

    if (i == 0)
        {
        if (s->version == SSL2_VERSION)
            {
            /* assume it is the socket being closed */
            return(SSL_ERROR_ZERO_RETURN);
            }
        else
            {
            if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) &&
                (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
                return(SSL_ERROR_ZERO_RETURN);
            }
        }
    return(SSL_ERROR_SYSCALL);
    }

int SSL_do_handshake(SSL *s)
    {
    int ret=1;

    if (s->handshake_func == NULL)
        {
        SSLerr(SSL_F_SSL_DO_HANDSHAKE,SSL_R_CONNECTION_TYPE_NOT_SET);
        return(-1);
        }

    s->method->ssl_renegotiate_check(s);

    if (SSL_in_init(s) || SSL_in_before(s))
        {
        ret=s->handshake_func(s);
        }
    return(ret);
    }

/* For the next 2 functions, SSL_clear() sets shutdown and so
 * one of these calls will reset it */
void SSL_set_accept_state(SSL *s)
    {
    s->server=1;
    s->shutdown=0;
    s->state=SSL_ST_ACCEPT|SSL_ST_BEFORE;
    s->handshake_func=s->method->ssl_accept;
    /* clear the current cipher */
    ssl_clear_cipher_ctx(s);
    ssl_clear_hash_ctx(&s->read_hash);
    ssl_clear_hash_ctx(&s->write_hash);
    }

void SSL_set_connect_state(SSL *s)
    {
    s->server=0;
    s->shutdown=0;
    s->state=SSL_ST_CONNECT|SSL_ST_BEFORE;
    s->handshake_func=s->method->ssl_connect;
    /* clear the current cipher */
    ssl_clear_cipher_ctx(s);
    ssl_clear_hash_ctx(&s->read_hash);
    ssl_clear_hash_ctx(&s->write_hash);
    }

int ssl_undefined_function(SSL *s)
    {
    SSLerr(SSL_F_SSL_UNDEFINED_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
    return(0);
    }

int ssl_undefined_void_function(void)
    {
    SSLerr(SSL_F_SSL_UNDEFINED_VOID_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
    return(0);
    }

int ssl_undefined_const_function(const SSL *s)
    {
    SSLerr(SSL_F_SSL_UNDEFINED_CONST_FUNCTION,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
    return(0);
    }

SSL_METHOD *ssl_bad_method(int ver)
    {
    SSLerr(SSL_F_SSL_BAD_METHOD,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
    return(NULL);
    }

const char *SSL_get_version(const SSL *s)
    {
    if (s->version == TLS1_2_VERSION)
        return("TLSv1.2");
    else if (s->version == TLS1_1_VERSION)
        return("TLSv1.1");
    if (s->version == TLS1_VERSION)
        return("TLSv1");
    else if (s->version == SSL3_VERSION)
        return("SSLv3");
    else if (s->version == SSL2_VERSION)
        return("SSLv2");
    else
        return("unknown");
    }

SSL *SSL_dup(SSL *s)
    {
    STACK_OF(X509_NAME) *sk;
    X509_NAME *xn;
    SSL *ret;
    int i;
    
    if ((ret=SSL_new(SSL_get_SSL_CTX(s))) == NULL)
        return(NULL);

    ret->version = s->version;
    ret->type = s->type;
    ret->method = s->method;

    if (s->session != NULL)
        {
        /* This copies session-id, SSL_METHOD, sid_ctx, and 'cert' */
        SSL_copy_session_id(ret,s);
        }
    else
        {
        /* No session has been established yet, so we have to expect
         * that s->cert or ret->cert will be changed later --
         * they should not both point to the same object,
         * and thus we can't use SSL_copy_session_id. */

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

        if (s->cert != NULL)
            {
            if (ret->cert != NULL)
                {
                ssl_cert_free(ret->cert);
                }
            ret->cert = ssl_cert_dup(s->cert);
            if (ret->cert == NULL)
                goto err;
            }
                
        SSL_set_session_id_context(ret,
            s->sid_ctx, s->sid_ctx_length);
        }

    ret->options=s->options;
    ret->mode=s->mode;
    SSL_set_max_cert_list(ret,SSL_get_max_cert_list(s));
    SSL_set_read_ahead(ret,SSL_get_read_ahead(s));
    ret->msg_callback = s->msg_callback;
    ret->msg_callback_arg = s->msg_callback_arg;
    SSL_set_verify(ret,SSL_get_verify_mode(s),
        SSL_get_verify_callback(s));
    SSL_set_verify_depth(ret,SSL_get_verify_depth(s));
    ret->generate_session_id = s->generate_session_id;

    SSL_set_info_callback(ret,SSL_get_info_callback(s));
    
    ret->debug=s->debug;

    /* copy app data, a little dangerous perhaps */
    if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL, &ret->ex_data, &s->ex_data))
        goto err;

    /* setup rbio, and wbio */
    if (s->rbio != NULL)
        {
        if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
            goto err;
        }
    if (s->wbio != NULL)
        {
        if (s->wbio != s->rbio)
            {
            if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
                goto err;
            }
        else
            ret->wbio=ret->rbio;
        }
    ret->rwstate = s->rwstate;
    ret->in_handshake = s->in_handshake;
    ret->handshake_func = s->handshake_func;
    ret->server = s->server;
    ret->renegotiate = s->renegotiate;
    ret->new_session = s->new_session;
    ret->quiet_shutdown = s->quiet_shutdown;
    ret->shutdown=s->shutdown;
    ret->state=s->state; /* SSL_dup does not really work at any state, though */
    ret->rstate=s->rstate;
    ret->init_num = 0; /* would have to copy ret->init_buf, ret->init_msg, ret->init_num, ret->init_off */
    ret->hit=s->hit;

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

    /* dup the cipher_list and cipher_list_by_id stacks */
    if (s->cipher_list != NULL)
        {
        if ((ret->cipher_list=sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
            goto err;
        }
    if (s->cipher_list_by_id != NULL)
        if ((ret->cipher_list_by_id=sk_SSL_CIPHER_dup(s->cipher_list_by_id))
            == NULL)
            goto err;

    /* Dup the client_CA list */
    if (s->client_CA != NULL)
        {
        if ((sk=sk_X509_NAME_dup(s->client_CA)) == NULL) goto err;
        ret->client_CA=sk;
        for (i=0; i<sk_X509_NAME_num(sk); i++)
            {
            xn=sk_X509_NAME_value(sk,i);
            if (sk_X509_NAME_set(sk,i,X509_NAME_dup(xn)) == NULL)
                {
                X509_NAME_free(xn);
                goto err;
                }
            }
        }

    if (0)
        {
err:
        if (ret != NULL) SSL_free(ret);
        ret=NULL;
        }
    return(ret);
    }

void ssl_clear_cipher_ctx(SSL *s)
    {
    if (s->enc_read_ctx != NULL)
        {
        EVP_CIPHER_CTX_cleanup(s->enc_read_ctx);
        OPENSSL_free(s->enc_read_ctx);
        s->enc_read_ctx=NULL;
        }
    if (s->enc_write_ctx != NULL)
        {
        EVP_CIPHER_CTX_cleanup(s->enc_write_ctx);
        OPENSSL_free(s->enc_write_ctx);
        s->enc_write_ctx=NULL;
        }
#ifndef OPENSSL_NO_COMP
    if (s->expand != NULL)
        {
        COMP_CTX_free(s->expand);
        s->expand=NULL;
        }
    if (s->compress != NULL)
        {
        COMP_CTX_free(s->compress);
        s->compress=NULL;
        }
#endif
    }

/* Fix this function so that it takes an optional type parameter */
X509 *SSL_get_certificate(const SSL *s)
    {
    if (s->cert != NULL)
        return(s->cert->key->x509);
    else
        return(NULL);
    }

/* Fix this function so that it takes an optional type parameter */
EVP_PKEY *SSL_get_privatekey(SSL *s)
    {
    if (s->cert != NULL)
        return(s->cert->key->privatekey);
    else
        return(NULL);
    }

const SSL_CIPHER *SSL_get_current_cipher(const SSL *s)
    {
    if ((s->session != NULL) && (s->session->cipher != NULL))
        return(s->session->cipher);
    return(NULL);
    }
#ifdef OPENSSL_NO_COMP
const void *SSL_get_current_compression(SSL *s)
    {
    return NULL;
    }
const void *SSL_get_current_expansion(SSL *s)
    {
    return NULL;
    }
#else

const COMP_METHOD *SSL_get_current_compression(SSL *s)
    {
    if (s->compress != NULL)
        return(s->compress->meth);
    return(NULL);
    }

const COMP_METHOD *SSL_get_current_expansion(SSL *s)
    {
    if (s->expand != NULL)
        return(s->expand->meth);
    return(NULL);
    }
#endif

int ssl_init_wbio_buffer(SSL *s,int push)
    {
    BIO *bbio;

    if (s->bbio == NULL)
        {
        bbio=BIO_new(BIO_f_buffer());
        if (bbio == NULL) return(0);
        s->bbio=bbio;
        }
    else
        {
        bbio=s->bbio;
        if (s->bbio == s->wbio)
            s->wbio=BIO_pop(s->wbio);
        }
    (void)BIO_reset(bbio);
/*  if (!BIO_set_write_buffer_size(bbio,16*1024)) */
    if (!BIO_set_read_buffer_size(bbio,1))
        {
        SSLerr(SSL_F_SSL_INIT_WBIO_BUFFER,ERR_R_BUF_LIB);
        return(0);
        }
    if (push)
        {
        if (s->wbio != bbio)
            s->wbio=BIO_push(bbio,s->wbio);
        }
    else
        {
        if (s->wbio == bbio)
            s->wbio=BIO_pop(bbio);
        }
    return(1);
    }

void ssl_free_wbio_buffer(SSL *s)
    {
    if (s->bbio == NULL) return;

    if (s->bbio == s->wbio)
        {
        /* remove buffering */
        s->wbio=BIO_pop(s->wbio);
#ifdef REF_CHECK /* not the usual REF_CHECK, but this avoids adding one more preprocessor symbol */
        assert(s->wbio != NULL);
#endif
    }
    BIO_free(s->bbio);
    s->bbio=NULL;
    }
    
void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode)
    {
    ctx->quiet_shutdown=mode;
    }

int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx)
    {
    return(ctx->quiet_shutdown);
    }

void SSL_set_quiet_shutdown(SSL *s,int mode)
    {
    s->quiet_shutdown=mode;
    }

int SSL_get_quiet_shutdown(const SSL *s)
    {
    return(s->quiet_shutdown);
    }

void SSL_set_shutdown(SSL *s,int mode)
    {
    s->shutdown=mode;
    }

int SSL_get_shutdown(const SSL *s)
    {
    return(s->shutdown);
    }

int SSL_version(const SSL *s)
    {
    return(s->version);
    }

SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl)
    {
    return(ssl->ctx);
    }

SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx)
    {
    if (ssl->ctx == ctx)
        return ssl->ctx;
#ifndef OPENSSL_NO_TLSEXT
    if (ctx == NULL)
        ctx = ssl->initial_ctx;
#endif
    if (ssl->cert != NULL)
        ssl_cert_free(ssl->cert);
    ssl->cert = ssl_cert_dup(ctx->cert);
    CRYPTO_add(&ctx->references,1,CRYPTO_LOCK_SSL_CTX);
    if (ssl->ctx != NULL)
        SSL_CTX_free(ssl->ctx); /* decrement reference count */
    ssl->ctx = ctx;
    return(ssl->ctx);
    }

#ifndef OPENSSL_NO_STDIO
int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
    {
    return(X509_STORE_set_default_paths(ctx->cert_store));
    }

int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
        const char *CApath)
    {
    return(X509_STORE_load_locations(ctx->cert_store,CAfile,CApath));
    }
#endif

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

/* One compiler (Diab DCC) doesn't like argument names in returned
   function pointer.  */
void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/,int /*type*/,int /*val*/)
    {
    return ssl->info_callback;
    }

int SSL_state(const SSL *ssl)
    {
    return(ssl->state);
    }

void SSL_set_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);
    }

#ifndef OPENSSL_NO_RSA
void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,RSA *(*cb)(SSL *ssl,
                              int is_export,
                              int keylength))
    {
    SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
    }

void SSL_set_tmp_rsa_callback(SSL *ssl,RSA *(*cb)(SSL *ssl,
                          int is_export,
                          int keylength))
    {
    SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_RSA_CB,(void (*)(void))cb);
    }
#endif

#ifdef DOXYGEN

RSA *cb(SSL *ssl,int is_export,int keylength)
    {}
#endif

#ifndef OPENSSL_NO_DH
void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,DH *(*dh)(SSL *ssl,int is_export,
                                                        int keylength))
    {
    SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
    }

void SSL_set_tmp_dh_callback(SSL *ssl,DH *(*dh)(SSL *ssl,int is_export,
                                                int keylength))
    {
    SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_DH_CB,(void (*)(void))dh);
    }
#endif

#ifndef OPENSSL_NO_ECDH
void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
                                                                int keylength))
    {
    SSL_CTX_callback_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
    }

void SSL_set_tmp_ecdh_callback(SSL *ssl,EC_KEY *(*ecdh)(SSL *ssl,int is_export,
                                                        int keylength))
    {
    SSL_callback_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH_CB,(void (*)(void))ecdh);
    }
#endif

#ifndef OPENSSL_NO_PSK
int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint)
    {
    if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
        {
        SSLerr(SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
        return 0;
        }
    if (ctx->psk_identity_hint != NULL)
        OPENSSL_free(ctx->psk_identity_hint);
    if (identity_hint != NULL)
        {
        ctx->psk_identity_hint = BUF_strdup(identity_hint);
        if (ctx->psk_identity_hint == NULL)
            return 0;
        }
    else
        ctx->psk_identity_hint = NULL;
    return 1;
    }

int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint)
    {
    if (s == NULL)
        return 0;

    if (s->session == NULL)
        return 1; /* session not created yet, ignored */

    if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN)
        {
        SSLerr(SSL_F_SSL_USE_PSK_IDENTITY_HINT, SSL_R_DATA_LENGTH_TOO_LONG);
        return 0;
        }
    if (s->session->psk_identity_hint != NULL)
        OPENSSL_free(s->session->psk_identity_hint);
    if (identity_hint != NULL)
        {
        s->session->psk_identity_hint = BUF_strdup(identity_hint);
        if (s->session->psk_identity_hint == NULL)
            return 0;
        }
    else
        s->session->psk_identity_hint = NULL;
    return 1;
    }

const char *SSL_get_psk_identity_hint(const SSL *s)
    {
    if (s == NULL || s->session == NULL)
        return NULL;
    return(s->session->psk_identity_hint);
    }

const char *SSL_get_psk_identity(const SSL *s)
    {
    if (s == NULL || s->session == NULL)
        return NULL;
    return(s->session->psk_identity);
    }

void SSL_set_psk_client_callback(SSL *s,
    unsigned int (*cb)(SSL *ssl, const char *hint,
                       char *identity, unsigned int max_identity_len, unsigned char *psk,
                       unsigned int max_psk_len))
    {
    s->psk_client_callback = cb;
    }

void SSL_CTX_set_psk_client_callback(SSL_CTX *ctx,
    unsigned int (*cb)(SSL *ssl, const char *hint,
                       char *identity, unsigned int max_identity_len, unsigned char *psk,
                       unsigned int max_psk_len))
    {
    ctx->psk_client_callback = cb;
    }

void SSL_set_psk_server_callback(SSL *s,
    unsigned int (*cb)(SSL *ssl, const char *identity,
                       unsigned char *psk, unsigned int max_psk_len))
    {
    s->psk_server_callback = cb;
    }

void SSL_CTX_set_psk_server_callback(SSL_CTX *ctx,
    unsigned int (*cb)(SSL *ssl, const char *identity,
                       unsigned char *psk, unsigned int max_psk_len))
    {
    ctx->psk_server_callback = cb;
    }
#endif

void SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
    {
    SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
    }
void SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))
    {
    SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb);
    }

/* Allocates new EVP_MD_CTX and sets pointer to it into given pointer
 * vairable, freeing  EVP_MD_CTX previously stored in that variable, if
 * any. If EVP_MD pointer is passed, initializes ctx with this md
 * Returns newly allocated ctx;
 */

EVP_MD_CTX *ssl_replace_hash(EVP_MD_CTX **hash,const EVP_MD *md) 
{
    ssl_clear_hash_ctx(hash);
    *hash = EVP_MD_CTX_create();
    if (md) EVP_DigestInit_ex(*hash,md,NULL);
    return *hash;
}
void ssl_clear_hash_ctx(EVP_MD_CTX **hash) 
{

    if (*hash) EVP_MD_CTX_destroy(*hash);
    *hash=NULL;
}

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

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

#if defined(_WINDLL) && defined(OPENSSL_SYS_WIN16)
#include "../crypto/bio/bss_file.c"
#endif

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