/src/libressl/ssl/ssl_lib.c

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/* $OpenBSD: ssl_lib.c,v 1.300 2022/07/24 15:05:16 jsing Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * ECC cipher suite support in OpenSSL originally developed by
 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 */
/* ====================================================================
 * Copyright 2005 Nokia. All rights reserved.
 *
 * The portions of the attached software ("Contribution") is developed by
 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 * license.
 *
 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 * support (see RFC 4279) to OpenSSL.
 *
 * No patent licenses or other rights except those expressly stated in
 * the OpenSSL open source license shall be deemed granted or received
 * expressly, by implication, estoppel, or otherwise.
 *
 * No assurances are provided by Nokia that the Contribution does not
 * infringe the patent or other intellectual property rights of any third
 * party or that the license provides you with all the necessary rights
 * to make use of the Contribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 * OTHERWISE.
 */

#include <arpa/inet.h>
#include <sys/socket.h>
#include <netinet/in.h>

#include <limits.h>
#include <stdio.h>

#include <openssl/dh.h>
#include <openssl/lhash.h>
#include <openssl/objects.h>
#include <openssl/ocsp.h>
#include <openssl/opensslconf.h>
#include <openssl/x509v3.h>

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

#include "bytestring.h"
#include "dtls_locl.h"
#include "ssl_locl.h"
#include "ssl_sigalgs.h"
#include "ssl_tlsext.h"

const char *SSL_version_str = OPENSSL_VERSION_TEXT;

int
SSL_clear(SSL *s)
{
  if (s->method == NULL) {
    SSLerror(s, 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->internal->hit = 0;
  s->internal->shutdown = 0;

  if (s->internal->renegotiate) {
    SSLerror(s, ERR_R_INTERNAL_ERROR);
    return (0);
  }

  s->version = s->method->version;
  s->client_version = s->version;
  s->internal->rwstate = SSL_NOTHING;
  s->internal->rstate = SSL_ST_READ_HEADER;

  tls13_ctx_free(s->internal->tls13);
  s->internal->tls13 = NULL;

  ssl3_release_init_buffer(s);

  ssl_clear_cipher_state(s);

  s->internal->first_packet = 0;

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

  return (1);
}

/* Used to change an SSL_CTXs default SSL method type */
int
SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth)
{
  STACK_OF(SSL_CIPHER) *ciphers;

  ctx->method = meth;

  ciphers = ssl_create_cipher_list(ctx->method, &ctx->cipher_list,
      ctx->internal->cipher_list_tls13, SSL_DEFAULT_CIPHER_LIST,
      ctx->internal->cert);
  if (ciphers == NULL || sk_SSL_CIPHER_num(ciphers) <= 0) {
    SSLerrorx(SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
    return (0);
  }
  return (1);
}

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

  if (ctx == NULL) {
    SSLerrorx(SSL_R_NULL_SSL_CTX);
    return (NULL);
  }
  if (ctx->method == NULL) {
    SSLerrorx(SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION);
    return (NULL);
  }

  if ((s = calloc(1, sizeof(*s))) == NULL)
    goto err;
  if ((s->internal = calloc(1, sizeof(*s->internal))) == NULL)
    goto err;

  if ((s->internal->rl = tls12_record_layer_new()) == NULL)
    goto err;

  s->internal->min_tls_version = ctx->internal->min_tls_version;
  s->internal->max_tls_version = ctx->internal->max_tls_version;
  s->internal->min_proto_version = ctx->internal->min_proto_version;
  s->internal->max_proto_version = ctx->internal->max_proto_version;

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

  if ((s->cert = ssl_cert_dup(ctx->internal->cert)) == NULL)
    goto err;

  s->internal->read_ahead = ctx->internal->read_ahead;
  s->internal->msg_callback = ctx->internal->msg_callback;
  s->internal->msg_callback_arg = ctx->internal->msg_callback_arg;
  s->verify_mode = ctx->verify_mode;
  s->sid_ctx_length = ctx->sid_ctx_length;
  OPENSSL_assert(s->sid_ctx_length <= sizeof s->sid_ctx);
  memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx));
  s->internal->verify_callback = ctx->internal->default_verify_callback;
  s->internal->generate_session_id = ctx->internal->generate_session_id;

  s->param = X509_VERIFY_PARAM_new();
  if (!s->param)
    goto err;
  X509_VERIFY_PARAM_inherit(s->param, ctx->param);
  s->internal->quiet_shutdown = ctx->internal->quiet_shutdown;
  s->max_send_fragment = ctx->internal->max_send_fragment;

  CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
  s->ctx = ctx;
  s->internal->tlsext_debug_cb = 0;
  s->internal->tlsext_debug_arg = NULL;
  s->internal->tlsext_ticket_expected = 0;
  s->tlsext_status_type = -1;
  s->internal->tlsext_status_expected = 0;
  s->internal->tlsext_ocsp_ids = NULL;
  s->internal->tlsext_ocsp_exts = NULL;
  s->internal->tlsext_ocsp_resp = NULL;
  s->internal->tlsext_ocsp_resp_len = 0;
  CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
  s->initial_ctx = ctx;

  if (ctx->internal->tlsext_ecpointformatlist != NULL) {
    s->internal->tlsext_ecpointformatlist =
        calloc(ctx->internal->tlsext_ecpointformatlist_length,
      sizeof(ctx->internal->tlsext_ecpointformatlist[0]));
    if (s->internal->tlsext_ecpointformatlist == NULL)
      goto err;
    memcpy(s->internal->tlsext_ecpointformatlist,
        ctx->internal->tlsext_ecpointformatlist,
        ctx->internal->tlsext_ecpointformatlist_length *
        sizeof(ctx->internal->tlsext_ecpointformatlist[0]));
    s->internal->tlsext_ecpointformatlist_length =
        ctx->internal->tlsext_ecpointformatlist_length;
  }
  if (ctx->internal->tlsext_supportedgroups != NULL) {
    s->internal->tlsext_supportedgroups =
        calloc(ctx->internal->tlsext_supportedgroups_length,
      sizeof(ctx->internal->tlsext_supportedgroups[0]));
    if (s->internal->tlsext_supportedgroups == NULL)
      goto err;
    memcpy(s->internal->tlsext_supportedgroups,
        ctx->internal->tlsext_supportedgroups,
        ctx->internal->tlsext_supportedgroups_length *
        sizeof(ctx->internal->tlsext_supportedgroups[0]));
    s->internal->tlsext_supportedgroups_length =
        ctx->internal->tlsext_supportedgroups_length;
  }

  CBS_init(&cbs, ctx->internal->alpn_client_proto_list,
      ctx->internal->alpn_client_proto_list_len);
  if (!CBS_stow(&cbs, &s->internal->alpn_client_proto_list,
      &s->internal->alpn_client_proto_list_len))
    goto err;

  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->server;

  SSL_clear(s);

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

  return (s);

 err:
  SSL_free(s);
  SSLerrorx(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) {
    SSLerrorx(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) {
    SSLerror(ssl, 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->internal->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->internal->generate_session_id = cb;
  CRYPTO_w_unlock(CRYPTO_LOCK_SSL);
  return (1);
}

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

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

  r.ssl_version = ssl->version;
  r.session_id_length = id_len;
  memcpy(r.session_id, id, id_len);

  CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX);
  p = lh_SSL_SESSION_retrieve(ssl->ctx->internal->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_set1_host(SSL *s, const char *hostname)
{
  struct in_addr ina;
  struct in6_addr in6a;

  if (hostname != NULL && *hostname != '\0' &&
      (inet_pton(AF_INET, hostname, &ina) == 1 ||
      inet_pton(AF_INET6, hostname, &in6a) == 1))
    return X509_VERIFY_PARAM_set1_ip_asc(s->param, hostname);
  else
    return X509_VERIFY_PARAM_set1_host(s->param, hostname, 0);
}

void
SSL_set_hostflags(SSL *s, unsigned int flags)
{
  X509_VERIFY_PARAM_set_hostflags(s->param, flags);
}

const char *
SSL_get0_peername(SSL *s)
{
  return X509_VERIFY_PARAM_get0_peername(s->param);
}

X509_VERIFY_PARAM *
SSL_CTX_get0_param(SSL_CTX *ctx)
{
  return (ctx->param);
}

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

X509_VERIFY_PARAM *
SSL_get0_param(SSL *ssl)
{
  return (ssl->param);
}

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

void
SSL_free(SSL *s)
{
  int i;

  if (s == NULL)
    return;

  i = CRYPTO_add(&s->references, -1, CRYPTO_LOCK_SSL);
  if (i > 0)
    return;

  X509_VERIFY_PARAM_free(s->param);

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

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

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

  tls13_ctx_free(s->internal->tls13);

  ssl3_release_init_buffer(s);

  sk_SSL_CIPHER_free(s->cipher_list);
  sk_SSL_CIPHER_free(s->internal->cipher_list_tls13);

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

  ssl_clear_cipher_state(s);

  ssl_cert_free(s->cert);

  free(s->tlsext_hostname);
  SSL_CTX_free(s->initial_ctx);

  free(s->internal->tlsext_ecpointformatlist);
  free(s->internal->tlsext_supportedgroups);

  sk_X509_EXTENSION_pop_free(s->internal->tlsext_ocsp_exts,
      X509_EXTENSION_free);
  sk_OCSP_RESPID_pop_free(s->internal->tlsext_ocsp_ids, OCSP_RESPID_free);
  free(s->internal->tlsext_ocsp_resp);

  sk_X509_NAME_pop_free(s->internal->client_CA, X509_NAME_free);

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

  SSL_CTX_free(s->ctx);

  free(s->internal->alpn_client_proto_list);

  free(s->internal->quic_transport_params);

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

  tls12_record_layer_free(s->internal->rl);

  free(s->internal);
  free(s);
}

int
SSL_up_ref(SSL *s)
{
  int refs = CRYPTO_add(&s->references, 1, CRYPTO_LOCK_SSL);
  return (refs > 1) ? 1 : 0;
}

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 = BIO_next(s->wbio);
      BIO_set_next(s->bbio, NULL);
    }
  }

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

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

void
SSL_set0_rbio(SSL *s, BIO *rbio)
{
  BIO_free_all(s->rbio);
  s->rbio = rbio;
}

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

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

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

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

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

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

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

  bio = BIO_new(BIO_s_socket());

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


/* return length of latest Finished message we sent, copy to 'buf' */
size_t
SSL_get_finished(const SSL *s, void *buf, size_t count)
{
  size_t  ret;

  ret = s->s3->hs.finished_len;
  if (count > ret)
    count = ret;
  memcpy(buf, s->s3->hs.finished, 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;

  ret = s->s3->hs.peer_finished_len;
  if (count > ret)
    count = ret;
  memcpy(buf, s->s3->hs.peer_finished, 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->internal->verify_callback);
}

void
SSL_CTX_set_keylog_callback(SSL_CTX *ctx, SSL_CTX_keylog_cb_func cb)
{
  ctx->internal->keylog_callback = cb;
}

SSL_CTX_keylog_cb_func
SSL_CTX_get_keylog_callback(const SSL_CTX *ctx)
{
  return (ctx->internal->keylog_callback);
}

int
SSL_set_num_tickets(SSL *s, size_t num_tickets)
{
  s->internal->num_tickets = num_tickets;

  return 1;
}

size_t
SSL_get_num_tickets(const SSL *s)
{
  return s->internal->num_tickets;
}

int
SSL_CTX_set_num_tickets(SSL_CTX *ctx, size_t num_tickets)
{
  ctx->internal->num_tickets = num_tickets;

  return 1;
}

size_t
SSL_CTX_get_num_tickets(const SSL_CTX *ctx)
{
  return ctx->internal->num_tickets;
}

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->internal->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->internal->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->internal->read_ahead = yes;
}

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

int
SSL_pending(const SSL *s)
{
  return (s->method->ssl_pending(s));
}

X509 *
SSL_get_peer_certificate(const SSL *s)
{
  X509 *cert;

  if (s == NULL || s->session == NULL)
    return NULL;

  if ((cert = s->session->peer_cert) == NULL)
    return NULL;

  X509_up_ref(cert);

  return cert;
}

STACK_OF(X509) *
SSL_get_peer_cert_chain(const SSL *s)
{
  if (s == NULL || s->session == NULL)
    return NULL;

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

STACK_OF(X509) *
SSL_get0_verified_chain(const SSL *s)
{
  return s->internal->verified_chain;
}

/*
 * 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
 */
int
SSL_copy_session_id(SSL *t, const SSL *f)
{
  SSL_CERT *tmp;

  /* Do we need to do SSL locking? */
  if (!SSL_set_session(t, SSL_get_session(f)))
    return 0;

  /* What if we are set up for one protocol but want to talk another? */
  if (t->method != f->method) {
    t->method->ssl_free(t);
    t->method = f->method;
    if (!t->method->ssl_new(t))
      return 0;
  }

  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;
  ssl_cert_free(tmp);

  if (!SSL_set_session_id_context(t, f->sid_ctx, f->sid_ctx_length))
    return 0;

  return 1;
}

/* 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->internal->cert == NULL) ||
      (ctx->internal->cert->key->x509 == NULL)) {
    SSLerrorx(SSL_R_NO_CERTIFICATE_ASSIGNED);
    return (0);
  }
  if (ctx->internal->cert->key->privatekey == NULL) {
    SSLerrorx(SSL_R_NO_PRIVATE_KEY_ASSIGNED);
    return (0);
  }
  return (X509_check_private_key(ctx->internal->cert->key->x509,
      ctx->internal->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) {
    SSLerrorx(ERR_R_PASSED_NULL_PARAMETER);
    return (0);
  }
  if (ssl->cert == NULL) {
    SSLerror(ssl, SSL_R_NO_CERTIFICATE_ASSIGNED);
    return (0);
  }
  if (ssl->cert->key->x509 == NULL) {
    SSLerror(ssl, SSL_R_NO_CERTIFICATE_ASSIGNED);
    return (0);
  }
  if (ssl->cert->key->privatekey == NULL) {
    SSLerror(ssl, 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->internal->handshake_func == NULL)
    SSL_set_accept_state(s); /* Not properly initialized yet */

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

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

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

int
SSL_is_dtls(const SSL *s)
{
  return s->method->dtls;
}

int
SSL_is_server(const SSL *s)
{
  return s->server;
}

static long
ssl_get_default_timeout()
{
  /*
   * 2 hours, the 24 hours mentioned in the TLSv1 spec
   * is way too long for http, the cache would over fill.
   */
  return (2 * 60 * 60);
}

long
SSL_get_default_timeout(const SSL *s)
{
  return (ssl_get_default_timeout());
}

int
SSL_read(SSL *s, void *buf, int num)
{
  if (num < 0) {
    SSLerror(s, SSL_R_BAD_LENGTH);
    return -1;
  }

  if (s->internal->handshake_func == NULL) {
    SSLerror(s, SSL_R_UNINITIALIZED);
    return (-1);
  }

  if (s->internal->shutdown & SSL_RECEIVED_SHUTDOWN) {
    s->internal->rwstate = SSL_NOTHING;
    return (0);
  }
  return ssl3_read(s, buf, num);
}

int
SSL_read_ex(SSL *s, void *buf, size_t num, size_t *bytes_read)
{
  int ret;

  /* We simply don't bother supporting enormous reads */
  if (num > INT_MAX) {
    SSLerror(s, SSL_R_BAD_LENGTH);
    return 0;
  }

  ret = SSL_read(s, buf, (int)num);
  if (ret < 0)
    ret = 0;
  *bytes_read = ret;

  return ret > 0;
}

int
SSL_peek(SSL *s, void *buf, int num)
{
  if (num < 0) {
    SSLerror(s, SSL_R_BAD_LENGTH);
    return -1;
  }

  if (s->internal->handshake_func == NULL) {
    SSLerror(s, SSL_R_UNINITIALIZED);
    return (-1);
  }

  if (s->internal->shutdown & SSL_RECEIVED_SHUTDOWN) {
    return (0);
  }
  return ssl3_peek(s, buf, num);
}

int
SSL_peek_ex(SSL *s, void *buf, size_t num, size_t *bytes_peeked)
{
  int ret;

  /* We simply don't bother supporting enormous peeks */
  if (num > INT_MAX) {
    SSLerror(s, SSL_R_BAD_LENGTH);
    return 0;
  }

  ret = SSL_peek(s, buf, (int)num);
  if (ret < 0)
    ret = 0;
  *bytes_peeked = ret;

  return ret > 0;
}

int
SSL_write(SSL *s, const void *buf, int num)
{
  if (num < 0) {
    SSLerror(s, SSL_R_BAD_LENGTH);
    return -1;
  }

  if (s->internal->handshake_func == NULL) {
    SSLerror(s, SSL_R_UNINITIALIZED);
    return (-1);
  }

  if (s->internal->shutdown & SSL_SENT_SHUTDOWN) {
    s->internal->rwstate = SSL_NOTHING;
    SSLerror(s, SSL_R_PROTOCOL_IS_SHUTDOWN);
    return (-1);
  }
  return ssl3_write(s, buf, num);
}

int
SSL_write_ex(SSL *s, const void *buf, size_t num, size_t *bytes_written)
{
  int ret;

  /* We simply don't bother supporting enormous writes */
  if (num > INT_MAX) {
    SSLerror(s, SSL_R_BAD_LENGTH);
    return 0;
  }

  if (num == 0) {
    /* This API is special */
    bytes_written = 0;
    return 1;
  }

  ret = SSL_write(s, buf, (int)num);
  if (ret < 0)
    ret = 0;
  *bytes_written = ret;

  return ret > 0;
}

uint32_t
SSL_CTX_get_max_early_data(const SSL_CTX *ctx)
{
  return 0;
}

int
SSL_CTX_set_max_early_data(SSL_CTX *ctx, uint32_t max_early_data)
{
  return 1;
}

uint32_t
SSL_get_max_early_data(const SSL *s)
{
  return 0;
}

int
SSL_set_max_early_data(SSL *s, uint32_t max_early_data)
{
  return 1;
}

int
SSL_get_early_data_status(const SSL *s)
{
  return SSL_EARLY_DATA_REJECTED;
}

int
SSL_read_early_data(SSL *s, void *buf, size_t num, size_t *readbytes)
{
  *readbytes = 0;

  if (!s->server) {
    SSLerror(s, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
    return SSL_READ_EARLY_DATA_ERROR;
  }

  return SSL_READ_EARLY_DATA_FINISH;
}

int
SSL_write_early_data(SSL *s, const void *buf, size_t num, size_t *written)
{
  *written = 0;
  SSLerror(s, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
  return 0;
}

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->internal->handshake_func == NULL) {
    SSLerror(s, SSL_R_UNINITIALIZED);
    return (-1);
  }

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

  return (1);
}

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

  s->internal->new_session = 1;

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

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

  s->internal->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->internal->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->internal->read_ahead);
  case SSL_CTRL_SET_READ_AHEAD:
    l = s->internal->read_ahead;
    s->internal->read_ahead = larg;
    return (l);

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

  case SSL_CTRL_OPTIONS:
    return (s->internal->options|=larg);
  case SSL_CTRL_CLEAR_OPTIONS:
    return (s->internal->options&=~larg);
  case SSL_CTRL_MODE:
    return (s->internal->mode|=larg);
  case SSL_CTRL_CLEAR_MODE:
    return (s->internal->mode &=~larg);
  case SSL_CTRL_GET_MAX_CERT_LIST:
    return (s->internal->max_cert_list);
  case SSL_CTRL_SET_MAX_CERT_LIST:
    l = s->internal->max_cert_list;
    s->internal->max_cert_list = larg;
    return (l);
  case SSL_CTRL_SET_MTU:
#ifndef OPENSSL_NO_DTLS1
    if (larg < (long)dtls1_min_mtu())
      return (0);
#endif
    if (SSL_is_dtls(s)) {
      s->d1->mtu = larg;
      return (larg);
    }
    return (0);
  case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
    if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
      return (0);
    s->max_send_fragment = larg;
    return (1);
  case SSL_CTRL_GET_RI_SUPPORT:
    if (s->s3)
      return (s->s3->send_connection_binding);
    else return (0);
  default:
    if (SSL_is_dtls(s))
      return dtls1_ctrl(s, cmd, larg, parg);
    return ssl3_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->internal->msg_callback = (ssl_msg_callback_fn *)(fp);
    return (1);

  default:
    return (ssl3_callback_ctrl(s, cmd, fp));
  }
}

struct lhash_st_SSL_SESSION *
SSL_CTX_sessions(SSL_CTX *ctx)
{
  return (ctx->internal->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->internal->read_ahead);
  case SSL_CTRL_SET_READ_AHEAD:
    l = ctx->internal->read_ahead;
    ctx->internal->read_ahead = larg;
    return (l);

  case SSL_CTRL_SET_MSG_CALLBACK_ARG:
    ctx->internal->msg_callback_arg = parg;
    return (1);

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

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

  case SSL_CTRL_SESS_NUMBER:
    return (lh_SSL_SESSION_num_items(ctx->internal->sessions));
  case SSL_CTRL_SESS_CONNECT:
    return (ctx->internal->stats.sess_connect);
  case SSL_CTRL_SESS_CONNECT_GOOD:
    return (ctx->internal->stats.sess_connect_good);
  case SSL_CTRL_SESS_CONNECT_RENEGOTIATE:
    return (ctx->internal->stats.sess_connect_renegotiate);
  case SSL_CTRL_SESS_ACCEPT:
    return (ctx->internal->stats.sess_accept);
  case SSL_CTRL_SESS_ACCEPT_GOOD:
    return (ctx->internal->stats.sess_accept_good);
  case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE:
    return (ctx->internal->stats.sess_accept_renegotiate);
  case SSL_CTRL_SESS_HIT:
    return (ctx->internal->stats.sess_hit);
  case SSL_CTRL_SESS_CB_HIT:
    return (ctx->internal->stats.sess_cb_hit);
  case SSL_CTRL_SESS_MISSES:
    return (ctx->internal->stats.sess_miss);
  case SSL_CTRL_SESS_TIMEOUTS:
    return (ctx->internal->stats.sess_timeout);
  case SSL_CTRL_SESS_CACHE_FULL:
    return (ctx->internal->stats.sess_cache_full);
  case SSL_CTRL_OPTIONS:
    return (ctx->internal->options|=larg);
  case SSL_CTRL_CLEAR_OPTIONS:
    return (ctx->internal->options&=~larg);
  case SSL_CTRL_MODE:
    return (ctx->internal->mode|=larg);
  case SSL_CTRL_CLEAR_MODE:
    return (ctx->internal->mode&=~larg);
  case SSL_CTRL_SET_MAX_SEND_FRAGMENT:
    if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH)
      return (0);
    ctx->internal->max_send_fragment = larg;
    return (1);
  default:
    return (ssl3_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->internal->msg_callback = (ssl_msg_callback_fn *)fp;
    return (1);

  default:
    return (ssl3_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);
}

STACK_OF(SSL_CIPHER) *
SSL_get_ciphers(const SSL *s)
{
  if (s == NULL)
    return (NULL);
  if (s->cipher_list != NULL)
    return (s->cipher_list);

  return (s->ctx->cipher_list);
}

STACK_OF(SSL_CIPHER) *
SSL_get_client_ciphers(const SSL *s)
{
  if (s == NULL || s->session == NULL || !s->server)
    return NULL;
  return s->session->ciphers;
}

STACK_OF(SSL_CIPHER) *
SSL_get1_supported_ciphers(SSL *s)
{
  STACK_OF(SSL_CIPHER) *supported_ciphers = NULL, *ciphers;
  SSL_CIPHER *cipher;
  uint16_t min_vers, max_vers;
  int i;

  if (s == NULL)
    return NULL;
  if (!ssl_supported_tls_version_range(s, &min_vers, &max_vers))
    return NULL;
  if ((ciphers = SSL_get_ciphers(s)) == NULL)
    return NULL;
  if ((supported_ciphers = sk_SSL_CIPHER_new_null()) == NULL)
    return NULL;

  for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
    if ((cipher = sk_SSL_CIPHER_value(ciphers, i)) == NULL)
      goto err;
    if (!ssl_cipher_allowed_in_tls_version_range(cipher, min_vers,
        max_vers))
      continue;
    if (!ssl_security_supported_cipher(s, cipher))
      continue;
    if (!sk_SSL_CIPHER_push(supported_ciphers, cipher))
      goto err;
  }

  if (sk_SSL_CIPHER_num(supported_ciphers) > 0)
    return supported_ciphers;

 err:
  sk_SSL_CIPHER_free(supported_ciphers);
  return NULL;
}

/* See if we have any ECC cipher suites. */
int
ssl_has_ecc_ciphers(SSL *s)
{
  STACK_OF(SSL_CIPHER) *ciphers;
  unsigned long alg_k, alg_a;
  SSL_CIPHER *cipher;
  int i;

  if ((ciphers = SSL_get_ciphers(s)) == NULL)
    return 0;

  for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
    cipher = sk_SSL_CIPHER_value(ciphers, i);

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

    if ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA))
      return 1;
  }

  return 0;
}

/* The old interface to get the same thing as SSL_get_ciphers(). */
const char *
SSL_get_cipher_list(const SSL *s, int n)
{
  STACK_OF(SSL_CIPHER) *ciphers;
  const SSL_CIPHER *cipher;

  if ((ciphers = SSL_get_ciphers(s)) == NULL)
    return (NULL);
  if ((cipher = sk_SSL_CIPHER_value(ciphers, n)) == NULL)
    return (NULL);

  return (cipher->name);
}

STACK_OF(SSL_CIPHER) *
SSL_CTX_get_ciphers(const SSL_CTX *ctx)
{
  if (ctx == NULL)
    return NULL;
  return ctx->cipher_list;
}

/* Specify the ciphers to be used by default by the SSL_CTX. */
int
SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str)
{
  STACK_OF(SSL_CIPHER) *ciphers;

  /*
   * 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 has been updated.
   */
  ciphers = ssl_create_cipher_list(ctx->method, &ctx->cipher_list,
      ctx->internal->cipher_list_tls13, str, ctx->internal->cert);
  if (ciphers == NULL) {
    return (0);
  } else if (sk_SSL_CIPHER_num(ciphers) == 0) {
    SSLerrorx(SSL_R_NO_CIPHER_MATCH);
    return (0);
  }
  return (1);
}

int
SSL_CTX_set_ciphersuites(SSL_CTX *ctx, const char *str)
{
  if (!ssl_parse_ciphersuites(&ctx->internal->cipher_list_tls13, str)) {
    SSLerrorx(SSL_R_NO_CIPHER_MATCH);
    return 0;
  }
  if (!ssl_merge_cipherlists(ctx->cipher_list,
      ctx->internal->cipher_list_tls13, &ctx->cipher_list))
    return 0;

  return 1;
}

/* Specify the ciphers to be used by the SSL. */
int
SSL_set_cipher_list(SSL *s, const char *str)
{
  STACK_OF(SSL_CIPHER) *ciphers, *ciphers_tls13;

  if ((ciphers_tls13 = s->internal->cipher_list_tls13) == NULL)
    ciphers_tls13 = s->ctx->internal->cipher_list_tls13;

  /* See comment in SSL_CTX_set_cipher_list. */
  ciphers = ssl_create_cipher_list(s->ctx->method, &s->cipher_list,
      ciphers_tls13, str, s->cert);
  if (ciphers == NULL) {
    return (0);
  } else if (sk_SSL_CIPHER_num(ciphers) == 0) {
    SSLerror(s, SSL_R_NO_CIPHER_MATCH);
    return (0);
  }
  return (1);
}

int
SSL_set_ciphersuites(SSL *s, const char *str)
{
  STACK_OF(SSL_CIPHER) *ciphers;

  if ((ciphers = s->cipher_list) == NULL)
    ciphers = s->ctx->cipher_list;

  if (!ssl_parse_ciphersuites(&s->internal->cipher_list_tls13, str)) {
    SSLerrorx(SSL_R_NO_CIPHER_MATCH);
    return (0);
  }
  if (!ssl_merge_cipherlists(ciphers, s->internal->cipher_list_tls13,
      &s->cipher_list))
    return 0;

  return 1;
}

char *
SSL_get_shared_ciphers(const SSL *s, char *buf, int len)
{
  STACK_OF(SSL_CIPHER) *client_ciphers, *server_ciphers;
  const SSL_CIPHER *cipher;
  size_t curlen = 0;
  char *end;
  int i;

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

  if ((client_ciphers = s->session->ciphers) == NULL)
    return NULL;
  if ((server_ciphers = SSL_get_ciphers(s)) == NULL)
    return NULL;
  if (sk_SSL_CIPHER_num(client_ciphers) == 0 ||
      sk_SSL_CIPHER_num(server_ciphers) == 0)
    return NULL;

  buf[0] = '\0';
  for (i = 0; i < sk_SSL_CIPHER_num(client_ciphers); i++) {
    cipher = sk_SSL_CIPHER_value(client_ciphers, i);

    if (sk_SSL_CIPHER_find(server_ciphers, cipher) < 0)
      continue;

    end = buf + curlen;
    if (strlcat(buf, cipher->name, len) >= len ||
        (curlen = strlcat(buf, ":", len)) >= len) {
      /* remove truncated cipher from list */
      *end = '\0';
      break;
    }
  }
  /* remove trailing colon */
  if ((end = strrchr(buf, ':')) != NULL)
    *end = '\0';
  return buf;
}

/*
 * Return a servername extension value if provided in Client Hello, or NULL.
 * So far, only host_name types are defined (RFC 3546).
 */
const char *
SSL_get_servername(const SSL *s, const int type)
{
  if (type != TLSEXT_NAMETYPE_host_name)
    return (NULL);

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

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

/*
 * SSL_select_next_proto implements standard protocol selection. It is
 * expected that this function is called from the callback set by
 * SSL_CTX_set_alpn_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.
 *
 * 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 is deprecated. */
void
SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
    unsigned int *len)
{
  *data = NULL;
  *len = 0;
}

/* SSL_CTX_set_next_protos_advertised_cb is deprecated. */
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)
{
}

/* SSL_CTX_set_next_proto_select_cb is deprecated. */
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)
{
}

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

  if (protos == NULL)
    protos_len = 0;

  CBS_init(&cbs, protos, protos_len);

  if (protos_len > 0) {
    if (!tlsext_alpn_check_format(&cbs))
      goto err;
  }

  if (!CBS_stow(&cbs, &ctx->internal->alpn_client_proto_list,
      &ctx->internal->alpn_client_proto_list_len))
    goto err;

  failed = 0;

 err:
  /* NOTE: Return values are the reverse of what you expect. */
  return failed;
}

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

  if (protos == NULL)
    protos_len = 0;

  CBS_init(&cbs, protos, protos_len);

  if (protos_len > 0) {
    if (!tlsext_alpn_check_format(&cbs))
      goto err;
  }

  if (!CBS_stow(&cbs, &ssl->internal->alpn_client_proto_list,
      &ssl->internal->alpn_client_proto_list_len))
    goto err;

  failed = 0;

 err:
  /* NOTE: Return values are the reverse of what you expect. */
  return failed;
}

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

/*
 * SSL_get0_alpn_selected gets the selected ALPN protocol (if any). On return
 * it sets data to point to len bytes of protocol name (not including the
 * leading length-prefix byte). If the server didn't respond with* a negotiated
 * protocol then len will be zero.
 */
void
SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
    unsigned int *len)
{
  *data = ssl->s3->alpn_selected;
  *len = ssl->s3->alpn_selected_len;
}

void
SSL_set_psk_use_session_callback(SSL *s, SSL_psk_use_session_cb_func cb)
{
  return;
}

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->internal->tls13 != NULL && s->version == TLS1_3_VERSION) {
    if (!use_context) {
      p = NULL;
      plen = 0;
    }
    return tls13_exporter(s->internal->tls13, label, llen, p, plen,
        out, olen);
  }

  return (tls1_export_keying_material(s, out, olen, label, llen, p, plen,
      use_context));
}

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

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

/*
 * NB: If this function (or indeed the hash function which uses a sort of
 * coarser function than this one) is changed, ensure
 * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being
 * able to construct an SSL_SESSION that will collide with any existing session
 * with a matching session ID.
 */
static int
ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b)
{
  if (a->ssl_version != b->ssl_version)
    return (1);
  if (a->session_id_length != b->session_id_length)
    return (1);
  if (timingsafe_memcmp(a->session_id, b->session_id, a->session_id_length) != 0)
    return (1);
  return (0);
}

/*
 * These wrapper functions should remain rather than redeclaring
 * SSL_SESSION_hash and SSL_SESSION_cmp for void* types and casting each
 * variable. The reason is that the functions aren't static, they're exposed via
 * ssl.h.
 */
static unsigned long
ssl_session_LHASH_HASH(const void *arg)
{
  const SSL_SESSION *a = arg;

  return ssl_session_hash(a);
}

static int
ssl_session_LHASH_COMP(const void *arg1, const void *arg2)
{
  const SSL_SESSION *a = arg1;
  const SSL_SESSION *b = arg2;

  return ssl_session_cmp(a, b);
}

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

  if (!OPENSSL_init_ssl(0, NULL)) {
    SSLerrorx(SSL_R_LIBRARY_BUG);
    return (NULL);
  }

  if (meth == NULL) {
    SSLerrorx(SSL_R_NULL_SSL_METHOD_PASSED);
    return (NULL);
  }

  if ((ret = calloc(1, sizeof(*ret))) == NULL) {
    SSLerrorx(ERR_R_MALLOC_FAILURE);
    return (NULL);
  }
  if ((ret->internal = calloc(1, sizeof(*ret->internal))) == NULL) {
    free(ret);
    SSLerrorx(ERR_R_MALLOC_FAILURE);
    return (NULL);
  }

  if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) {
    SSLerrorx(SSL_R_X509_VERIFICATION_SETUP_PROBLEMS);
    goto err;
  }

  ret->method = meth;
  ret->internal->min_tls_version = meth->min_tls_version;
  ret->internal->max_tls_version = meth->max_tls_version;
  ret->internal->min_proto_version = 0;
  ret->internal->max_proto_version = 0;
  ret->internal->mode = SSL_MODE_AUTO_RETRY;

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

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

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

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

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

  ret->internal->info_callback = NULL;

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

  ret->internal->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT;
  ret->internal->read_ahead = 0;
  ret->internal->msg_callback = 0;
  ret->internal->msg_callback_arg = NULL;
  ret->verify_mode = SSL_VERIFY_NONE;
  ret->sid_ctx_length = 0;
  ret->internal->default_verify_callback = NULL;

  if ((ret->internal->cert = ssl_cert_new()) == NULL)
    goto err;

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

  ret->internal->sessions = lh_SSL_SESSION_new();
  if (ret->internal->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,
      NULL, SSL_DEFAULT_CIPHER_LIST, ret->internal->cert);
  if (ret->cipher_list == NULL ||
      sk_SSL_CIPHER_num(ret->cipher_list) <= 0) {
    SSLerrorx(SSL_R_LIBRARY_HAS_NO_CIPHERS);
    goto err2;
  }

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

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

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

  ret->extra_certs = NULL;

  ret->internal->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;

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

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

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

#ifndef OPENSSL_NO_ENGINE
  ret->internal->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->internal->options |= SSL_OP_LEGACY_SERVER_CONNECT;

  return (ret);
 err:
  SSLerrorx(ERR_R_MALLOC_FAILURE);
 err2:
  SSL_CTX_free(ret);
  return (NULL);
}

void
SSL_CTX_free(SSL_CTX *ctx)
{
  int i;

  if (ctx == NULL)
    return;

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

  X509_VERIFY_PARAM_free(ctx->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 (ctx->internal->sessions != NULL)
    SSL_CTX_flush_sessions(ctx, 0);

  CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ctx, &ctx->internal->ex_data);

  lh_SSL_SESSION_free(ctx->internal->sessions);

  X509_STORE_free(ctx->cert_store);
  sk_SSL_CIPHER_free(ctx->cipher_list);
  sk_SSL_CIPHER_free(ctx->internal->cipher_list_tls13);
  ssl_cert_free(ctx->internal->cert);
  sk_X509_NAME_pop_free(ctx->internal->client_CA, X509_NAME_free);
  sk_X509_pop_free(ctx->extra_certs, X509_free);

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

#ifndef OPENSSL_NO_ENGINE
  ENGINE_finish(ctx->internal->client_cert_engine);
#endif

  free(ctx->internal->tlsext_ecpointformatlist);
  free(ctx->internal->tlsext_supportedgroups);

  free(ctx->internal->alpn_client_proto_list);

  free(ctx->internal);
  free(ctx);
}

int
SSL_CTX_up_ref(SSL_CTX *ctx)
{
  int refs = CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
  return ((refs > 1) ? 1 : 0);
}

pem_password_cb *
SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx)
{
  return (ctx->default_passwd_callback);
}

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

void *
SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx)
{
  return ctx->default_passwd_callback_userdata;
}

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->internal->app_verify_callback = cb;
  ctx->internal->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->internal->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(SSL_CERT *c, const SSL_CIPHER *cipher)
{
  unsigned long mask_a, mask_k;
  SSL_CERT_PKEY *cpk;

  if (c == NULL)
    return;

  mask_a = SSL_aNULL | SSL_aTLS1_3;
  mask_k = SSL_kECDHE | SSL_kTLS1_3;

  if (c->dhe_params != NULL || c->dhe_params_cb != NULL ||
      c->dhe_params_auto != 0)
    mask_k |= SSL_kDHE;

  cpk = &(c->pkeys[SSL_PKEY_ECC]);
  if (cpk->x509 != NULL && cpk->privatekey != NULL) {
    /* Key usage, if present, must allow signing. */
    if (X509_get_key_usage(cpk->x509) & X509v3_KU_DIGITAL_SIGNATURE)
      mask_a |= SSL_aECDSA;
  }

  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_RSA]);
  if (cpk->x509 != NULL && cpk->privatekey != NULL) {
    mask_a |= SSL_aRSA;
    mask_k |= SSL_kRSA;
  }

  c->mask_k = mask_k;
  c->mask_a = mask_a;
  c->valid = 1;
}

/* See if this handshake is using an ECC cipher suite. */
int
ssl_using_ecc_cipher(SSL *s)
{
  unsigned long alg_a, alg_k;

  alg_a = s->s3->hs.cipher->algorithm_auth;
  alg_k = s->s3->hs.cipher->algorithm_mkey;

  return s->session->tlsext_ecpointformatlist != NULL &&
      s->session->tlsext_ecpointformatlist_length > 0 &&
      ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA));
}

int
ssl_check_srvr_ecc_cert_and_alg(SSL *s, X509 *x)
{
  const SSL_CIPHER *cs = s->s3->hs.cipher;
  unsigned long alg_a;

  alg_a = cs->algorithm_auth;

  if (alg_a & SSL_aECDSA) {
    /* Key usage, if present, must allow signing. */
    if (!(X509_get_key_usage(x) & X509v3_KU_DIGITAL_SIGNATURE)) {
      SSLerror(s, SSL_R_ECC_CERT_NOT_FOR_SIGNING);
      return (0);
    }
  }

  return (1);
}

SSL_CERT_PKEY *
ssl_get_server_send_pkey(const SSL *s)
{
  unsigned long alg_a;
  SSL_CERT *c;
  int i;

  c = s->cert;
  ssl_set_cert_masks(c, s->s3->hs.cipher);

  alg_a = s->s3->hs.cipher->algorithm_auth;

  if (alg_a & SSL_aECDSA) {
    i = SSL_PKEY_ECC;
  } else if (alg_a & SSL_aRSA) {
    i = SSL_PKEY_RSA;
  } else if (alg_a & SSL_aGOST01) {
    i = SSL_PKEY_GOST01;
  } else { /* if (alg_a & SSL_aNULL) */
    SSLerror(s, ERR_R_INTERNAL_ERROR);
    return (NULL);
  }

  return (c->pkeys + i);
}

EVP_PKEY *
ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *cipher, const EVP_MD **pmd,
    const struct ssl_sigalg **sap)
{
  const struct ssl_sigalg *sigalg = NULL;
  EVP_PKEY *pkey = NULL;
  unsigned long alg_a;
  SSL_CERT *c;
  int idx = -1;

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

  if (alg_a & SSL_aRSA) {
    idx = SSL_PKEY_RSA;
  } else if ((alg_a & SSL_aECDSA) &&
      (c->pkeys[SSL_PKEY_ECC].privatekey != NULL))
    idx = SSL_PKEY_ECC;
  if (idx == -1) {
    SSLerror(s, ERR_R_INTERNAL_ERROR);
    return (NULL);
  }

  pkey = c->pkeys[idx].privatekey;
  if ((sigalg = ssl_sigalg_select(s, pkey)) == NULL) {
    SSLerror(s, SSL_R_SIGNATURE_ALGORITHMS_ERROR);
    return (NULL);
  }
  *pmd = sigalg->md();
  *sap = sigalg;

  return (pkey);
}

size_t
ssl_dhe_params_auto_key_bits(SSL *s)
{
  SSL_CERT_PKEY *cpk;
  int key_bits;

  if (s->cert->dhe_params_auto == 2) {
    key_bits = 1024;
  } else if (s->s3->hs.cipher->algorithm_auth & SSL_aNULL) {
    key_bits = 1024;
    if (s->s3->hs.cipher->strength_bits == 256)
      key_bits = 3072;
  } else {
    if ((cpk = ssl_get_server_send_pkey(s)) == NULL)
      return 0;
    if (cpk->privatekey == NULL ||
        EVP_PKEY_get0_RSA(cpk->privatekey) == NULL)
      return 0;
    if ((key_bits = EVP_PKEY_bits(cpk->privatekey)) <= 0)
      return 0;
  }

  return key_bits;
}

static int
ssl_should_update_external_cache(SSL *s, int mode)
{
  int cache_mode;

  cache_mode = s->session_ctx->internal->session_cache_mode;

  /* Don't cache if mode says not to */
  if ((cache_mode & mode) == 0)
    return 0;

  /* if it is not already cached, cache it */
  if (!s->internal->hit)
    return 1;

  /* If it's TLS 1.3, do it to match OpenSSL */
  if (s->s3->hs.negotiated_tls_version >= TLS1_3_VERSION)
    return 1;

  return 0;
}

static int
ssl_should_update_internal_cache(SSL *s, int mode)
{
  int cache_mode;

  cache_mode = s->session_ctx->internal->session_cache_mode;

  /* Don't cache if mode says not to */
  if ((cache_mode & mode) == 0)
    return 0;

  /* If it is already cached, don't cache it again */
  if (s->internal->hit)
    return 0;

  if ((cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE) != 0)
    return 0;

  /* If we are lesser than TLS 1.3, Cache it. */
  if (s->s3->hs.negotiated_tls_version < TLS1_3_VERSION)
    return 1;

  /* Below this we consider TLS 1.3 or later */

  /* If it's not a server, add it? OpenSSL does this. */
  if (!s->server)
    return 1;

  /* XXX if we support early data / PSK need to add */

  /*
   * If we have the remove session callback, we will want
   * to know about this even if it's a stateless ticket
   * from 1.3 so we can know when it is removed.
   */
  if (s->session_ctx->internal->remove_session_cb != NULL)
    return 1;

  /* If we have set OP_NO_TICKET, cache it. */
  if ((s->internal->options & SSL_OP_NO_TICKET) != 0)
    return 1;

  /* Otherwise do not cache */
  return 0;
}

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

  if (s->session->session_id_length == 0)
    return;

  cache_mode = s->session_ctx->internal->session_cache_mode;
  do_callback = ssl_should_update_external_cache(s, mode);

  if (ssl_should_update_internal_cache(s, mode)) {
    /*
     * XXX should we fail if the add to the internal cache
     * fails? OpenSSL doesn't care..
     */
    (void) SSL_CTX_add_session(s->session_ctx, s->session);
  }

  /*
   * Update the "external cache" by calling the new session
   * callback if present, even with TLS 1.3 without early data
   * "because some application just want to know about the
   * creation of a session and aren't doing a full cache".
   * Apparently, if they are doing a full cache, they'll have
   * some fun, but we endeavour to give application writers the
   * same glorious experience they expect from OpenSSL which
   * does it this way.
   */
  if (do_callback && s->session_ctx->internal->new_session_cb != NULL) {
        CRYPTO_add(&s->session->references, 1, CRYPTO_LOCK_SSL_SESSION);
        if (!s->session_ctx->internal->new_session_cb(s, s->session))
          SSL_SESSION_free(s->session);
  }

  /* Auto flush every 255 connections. */
  if (!(cache_mode & SSL_SESS_CACHE_NO_AUTO_CLEAR) &&
      (cache_mode & mode) != 0) {
    int connections;
    if (mode & SSL_SESS_CACHE_CLIENT)
      connections = s->session_ctx->internal->stats.sess_connect_good;
    else
      connections = s->session_ctx->internal->stats.sess_accept_good;
    if ((connections & 0xff) == 0xff)
      SSL_CTX_flush_sessions(s->session_ctx, time(NULL));
  }
}

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

int
SSL_set_ssl_method(SSL *s, const SSL_METHOD *method)
{
  int (*handshake_func)(SSL *) = NULL;
  int ret = 1;

  if (s->method == method)
    return (ret);

  if (s->internal->handshake_func == s->method->ssl_connect)
    handshake_func = method->ssl_connect;
  else if (s->internal->handshake_func == s->method->ssl_accept)
    handshake_func = method->ssl_accept;

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

  return (ret);
}

int
SSL_get_error(const SSL *s, int i)
{
  unsigned long l;
  int reason;
  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 (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->internal->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 (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 (SSL_want_x509_lookup(s))
    return (SSL_ERROR_WANT_X509_LOOKUP);

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

  s->method->ssl_renegotiate_check(s);

  if (!SSL_in_init(s) && !SSL_in_before(s))
    return 1;

  return s->internal->handshake_func(s);
}

/*
 * 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->internal->shutdown = 0;
  s->s3->hs.state = SSL_ST_ACCEPT|SSL_ST_BEFORE;
  s->internal->handshake_func = s->method->ssl_accept;
  ssl_clear_cipher_state(s);
}

void
SSL_set_connect_state(SSL *s)
{
  s->server = 0;
  s->internal->shutdown = 0;
  s->s3->hs.state = SSL_ST_CONNECT|SSL_ST_BEFORE;
  s->internal->handshake_func = s->method->ssl_connect;
  ssl_clear_cipher_state(s);
}

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

int
ssl_undefined_void_function(void)
{
  SSLerrorx(ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
  return (0);
}

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

const char *
ssl_version_string(int ver)
{
  switch (ver) {
  case TLS1_VERSION:
    return (SSL_TXT_TLSV1);
  case TLS1_1_VERSION:
    return (SSL_TXT_TLSV1_1);
  case TLS1_2_VERSION:
    return (SSL_TXT_TLSV1_2);
  case TLS1_3_VERSION:
    return (SSL_TXT_TLSV1_3);
  case DTLS1_VERSION:
    return (SSL_TXT_DTLS1);
  case DTLS1_2_VERSION:
    return (SSL_TXT_DTLS1_2);
  default:
    return ("unknown");
  }
}

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

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)
    goto err;

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

  if (s->session != NULL) {
    if (!SSL_copy_session_id(ret, s))
      goto err;
  } 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);

    ssl_cert_free(ret->cert);
    if ((ret->cert = ssl_cert_dup(s->cert)) == NULL)
      goto err;

    if (!SSL_set_session_id_context(ret, s->sid_ctx,
        s->sid_ctx_length))
      goto err;
  }

  ret->internal->options = s->internal->options;
  ret->internal->mode = s->internal->mode;
  SSL_set_max_cert_list(ret, SSL_get_max_cert_list(s));
  SSL_set_read_ahead(ret, SSL_get_read_ahead(s));
  ret->internal->msg_callback = s->internal->msg_callback;
  ret->internal->msg_callback_arg = s->internal->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->internal->generate_session_id = s->internal->generate_session_id;

  SSL_set_info_callback(ret, SSL_get_info_callback(s));

  ret->internal->debug = s->internal->debug;

  /* copy app data, a little dangerous perhaps */
  if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_SSL,
      &ret->internal->ex_data, &s->internal->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->internal->rwstate = s->internal->rwstate;
  ret->internal->in_handshake = s->internal->in_handshake;
  ret->internal->handshake_func = s->internal->handshake_func;
  ret->server = s->server;
  ret->internal->renegotiate = s->internal->renegotiate;
  ret->internal->new_session = s->internal->new_session;
  ret->internal->quiet_shutdown = s->internal->quiet_shutdown;
  ret->internal->shutdown = s->internal->shutdown;
  /* SSL_dup does not really work at any state, though */
  ret->s3->hs.state = s->s3->hs.state;
  ret->internal->rstate = s->internal->rstate;

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

  ret->internal->hit = s->internal->hit;

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

  if (s->cipher_list != NULL) {
    if ((ret->cipher_list =
        sk_SSL_CIPHER_dup(s->cipher_list)) == NULL)
      goto err;
  }
  if (s->internal->cipher_list_tls13 != NULL) {
    if ((ret->internal->cipher_list_tls13 =
        sk_SSL_CIPHER_dup(s->internal->cipher_list_tls13)) == NULL)
      goto err;
  }

  /* Dup the client_CA list */
  if (s->internal->client_CA != NULL) {
    if ((sk = sk_X509_NAME_dup(s->internal->client_CA)) == NULL) goto err;
      ret->internal->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;
      }
    }
  }

  return ret;
 err:
  SSL_free(ret);
  return NULL;
}

void
ssl_clear_cipher_state(SSL *s)
{
  tls12_record_layer_clear_read_state(s->internal->rl);
  tls12_record_layer_clear_write_state(s->internal->rl);
}

void
ssl_info_callback(const SSL *s, int type, int value)
{
  ssl_info_callback_fn *cb;

  if ((cb = s->internal->info_callback) == NULL)
    cb = s->ctx->internal->info_callback;
  if (cb != NULL)
    cb(s, type, value);
}

void
ssl_msg_callback(SSL *s, int is_write, int content_type,
    const void *msg_buf, size_t msg_len)
{
  if (s->internal->msg_callback != NULL)
    s->internal->msg_callback(is_write, s->version, content_type,
        msg_buf, msg_len, s, s->internal->msg_callback_arg);
}

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

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

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

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

size_t
SSL_get_client_random(const SSL *s, unsigned char *out, size_t max_out)
{
  size_t len = sizeof(s->s3->client_random);

  if (out == NULL)
    return len;

  if (len > max_out)
    len = max_out;

  memcpy(out, s->s3->client_random, len);

  return len;
}

size_t
SSL_get_server_random(const SSL *s, unsigned char *out, size_t max_out)
{
  size_t len = sizeof(s->s3->server_random);

  if (out == NULL)
    return len;

  if (len > max_out)
    len = max_out;

  memcpy(out, s->s3->server_random, len);

  return len;
}

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)) {
    SSLerror(s, ERR_R_BUF_LIB);
    return (0);
  }
  if (push) {
    if (s->wbio != bbio)
      s->wbio = BIO_push(bbio, s->wbio);
  } else {
    if (s->wbio == bbio)
      s->wbio = BIO_pop(bbio);
  }
  return (1);
}

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

  if (s->bbio == NULL)
    return;

  if (s->bbio == s->wbio) {
    /* remove buffering */
    s->wbio = BIO_pop(s->wbio);
  }
  BIO_free(s->bbio);
  s->bbio = NULL;
}

void
SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode)
{
  ctx->internal->quiet_shutdown = mode;
}

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

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

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

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

int
SSL_get_shutdown(const SSL *s)
{
  return (s->internal->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)
{
  SSL_CERT *new_cert;

  if (ctx == NULL)
    ctx = ssl->initial_ctx;
  if (ssl->ctx == ctx)
    return (ssl->ctx);

  if ((new_cert = ssl_cert_dup(ctx->internal->cert)) == NULL)
    return NULL;
  ssl_cert_free(ssl->cert);
  ssl->cert = new_cert;

  SSL_CTX_up_ref(ctx);
  SSL_CTX_free(ssl->ctx); /* decrement reference count */
  ssl->ctx = ctx;

  return (ssl->ctx);
}

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

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

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

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

void (*SSL_get_info_callback(const SSL *ssl))(const SSL *ssl, int type, int val)
{
  return (ssl->internal->info_callback);
}

int
SSL_state(const SSL *ssl)
{
  return (ssl->s3->hs.state);
}

void
SSL_set_state(SSL *ssl, int state)
{
  ssl->s3->hs.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_verify_client_post_handshake(SSL *ssl)
{
  return 0;
}

void
SSL_CTX_set_post_handshake_auth(SSL_CTX *ctx, int val)
{
  return;
}

void
SSL_set_post_handshake_auth(SSL *ssl, int val)
{
  return;
}

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->internal->ex_data, idx, arg));
}

void *
SSL_get_ex_data(const SSL *s, int idx)
{
  return (CRYPTO_get_ex_data(&s->internal->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->internal->ex_data, idx, arg));
}

void *
SSL_CTX_get_ex_data(const SSL_CTX *s, int idx)
{
  return (CRYPTO_get_ex_data(&s->internal->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)
{
  X509_STORE_free(ctx->cert_store);
  ctx->cert_store = store;
}

X509 *
SSL_CTX_get0_certificate(const SSL_CTX *ctx)
{
  if (ctx->internal->cert == NULL)
    return NULL;

  return ctx->internal->cert->key->x509;
}

EVP_PKEY *
SSL_CTX_get0_privatekey(const SSL_CTX *ctx)
{
  if (ctx->internal->cert == NULL)
    return NULL;

  return ctx->internal->cert->key->privatekey;
}

int
SSL_want(const SSL *s)
{
  return (s->internal->rwstate);
}

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

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

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

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

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

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


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

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

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

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

int
SSL_CTX_get_min_proto_version(SSL_CTX *ctx)
{
  return ctx->internal->min_proto_version;
}

int
SSL_CTX_set_min_proto_version(SSL_CTX *ctx, uint16_t version)
{
  return ssl_version_set_min(ctx->method, version,
      ctx->internal->max_tls_version, &ctx->internal->min_tls_version,
      &ctx->internal->min_proto_version);
}

int
SSL_CTX_get_max_proto_version(SSL_CTX *ctx)
{
  return ctx->internal->max_proto_version;
}

int
SSL_CTX_set_max_proto_version(SSL_CTX *ctx, uint16_t version)
{
  return ssl_version_set_max(ctx->method, version,
      ctx->internal->min_tls_version, &ctx->internal->max_tls_version,
      &ctx->internal->max_proto_version);
}

int
SSL_get_min_proto_version(SSL *ssl)
{
  return ssl->internal->min_proto_version;
}

int
SSL_set_min_proto_version(SSL *ssl, uint16_t version)
{
  return ssl_version_set_min(ssl->method, version,
      ssl->internal->max_tls_version, &ssl->internal->min_tls_version,
      &ssl->internal->min_proto_version);
}
int
SSL_get_max_proto_version(SSL *ssl)
{
  return ssl->internal->max_proto_version;
}

int
SSL_set_max_proto_version(SSL *ssl, uint16_t version)
{
  return ssl_version_set_max(ssl->method, version,
      ssl->internal->min_tls_version, &ssl->internal->max_tls_version,
      &ssl->internal->max_proto_version);
}

const SSL_METHOD *
SSL_CTX_get_ssl_method(const SSL_CTX *ctx)
{
  return ctx->method;
}

int
SSL_CTX_get_security_level(const SSL_CTX *ctx)
{
  return ctx->internal->cert->security_level;
}

void
SSL_CTX_set_security_level(SSL_CTX *ctx, int level)
{
  ctx->internal->cert->security_level = level;
}

int
SSL_get_security_level(const SSL *ssl)
{
  return ssl->cert->security_level;
}

void
SSL_set_security_level(SSL *ssl, int level)
{
  ssl->cert->security_level = level;
}

int
SSL_is_quic(const SSL *ssl)
{
  return ssl->quic_method != NULL;
}

int
SSL_set_quic_transport_params(SSL *ssl, const uint8_t *params,
    size_t params_len)
{
  freezero(ssl->internal->quic_transport_params,
      ssl->internal->quic_transport_params_len);
  ssl->internal->quic_transport_params = NULL;
  ssl->internal->quic_transport_params_len = 0;

  if ((ssl->internal->quic_transport_params = malloc(params_len)) == NULL)
    return 0;

  memcpy(ssl->internal->quic_transport_params, params, params_len);
  ssl->internal->quic_transport_params_len = params_len;

  return 1;
}

void
SSL_get_peer_quic_transport_params(const SSL *ssl, const uint8_t **out_params,
    size_t *out_params_len)
{
  *out_params = ssl->s3->peer_quic_transport_params;
  *out_params_len = ssl->s3->peer_quic_transport_params_len;
}

static int
ssl_cipher_id_cmp_BSEARCH_CMP_FN(const void *a_, const void *b_)
{
  SSL_CIPHER const *a = a_;
  SSL_CIPHER const *b = b_;
  return ssl_cipher_id_cmp(a, b);
}

SSL_CIPHER *
OBJ_bsearch_ssl_cipher_id(SSL_CIPHER *key, SSL_CIPHER const *base, int num)
{
  return (SSL_CIPHER *)OBJ_bsearch_(key, base, num, sizeof(SSL_CIPHER),
      ssl_cipher_id_cmp_BSEARCH_CMP_FN);
}

Coverage Report

Created: 2022-08-24 06:30