/* $OpenBSD: ssl_lib.c,v 1.333 2025/06/09 10:14:38 tb 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>

#include "bytestring.h"
#include "dtls_local.h"
#include "ssl_local.h"
#include "ssl_sigalgs.h"
#include "ssl_tlsext.h"
#include "tls12_internal.h"

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

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

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

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

        ssl3_release_init_buffer(s);

        ssl_clear_cipher_state(s);

        s->first_packet = 0;

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

        return (1);
}
LSSL_ALIAS(SSL_clear);

/* 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->cipher_list_tls13, SSL_DEFAULT_CIPHER_LIST,
            ctx->cert);
        if (ciphers == NULL || sk_SSL_CIPHER_num(ciphers) <= 0) {
                SSLerrorx(SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS);
                return (0);
        }
        return (1);
}
LSSL_ALIAS(SSL_CTX_set_ssl_version);

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->rl = tls12_record_layer_new()) == NULL)
                goto err;

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

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

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

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

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

        CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
        s->ctx = ctx;
        s->tlsext_debug_cb = NULL;
        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_resp_len = 0;
        CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX);
        s->initial_ctx = ctx;

        if (!tlsext_randomize_build_order(s))
                goto err;

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

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

        s->verify_result = X509_V_OK;

        s->method = ctx->method;
        s->quic_method = ctx->quic_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->ex_data);

        return (s);

 err:
        SSL_free(s);
        SSLerrorx(ERR_R_MALLOC_FAILURE);
        return (NULL);
}
LSSL_ALIAS(SSL_new);

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);
}
LSSL_ALIAS(SSL_CTX_set_session_id_context);

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);
}
LSSL_ALIAS(SSL_set_session_id_context);

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);
}
LSSL_ALIAS(SSL_CTX_set_generate_session_id);

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);
}
LSSL_ALIAS(SSL_set_generate_session_id);

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

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

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

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

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

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

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

int
SSL_set_trust(SSL *s, int trust)
{
        return (X509_VERIFY_PARAM_set_trust(s->param, trust));
}
LSSL_ALIAS(SSL_set_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);
}
LSSL_ALIAS(SSL_set1_host);

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

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

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

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

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

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

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->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->tls13);

        ssl3_release_init_buffer(s);

        sk_SSL_CIPHER_free(s->cipher_list);
        sk_SSL_CIPHER_free(s->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_build_order);

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

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

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

        sk_X509_NAME_pop_free(s->client_CA, X509_NAME_free);

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

        SSL_CTX_free(s->ctx);

        free(s->alpn_client_proto_list);

        free(s->quic_transport_params);

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

        tls12_record_layer_free(s->rl);

        free(s);
}
LSSL_ALIAS(SSL_free);

int
SSL_up_ref(SSL *s)
{
        return CRYPTO_add(&s->references, 1, CRYPTO_LOCK_SSL) > 1;
}
LSSL_ALIAS(SSL_up_ref);

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;
}
LSSL_ALIAS(SSL_set_bio);

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

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

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

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

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);
}
LSSL_ALIAS(SSL_get_rfd);

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);
}
LSSL_ALIAS(SSL_get_wfd);

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);
}
LSSL_ALIAS(SSL_set_fd);

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);
}
LSSL_ALIAS(SSL_set_wfd);

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);
}
LSSL_ALIAS(SSL_set_rfd);


/* 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);
}
LSSL_ALIAS(SSL_get_finished);

/* 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);
}
LSSL_ALIAS(SSL_get_peer_finished);


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

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

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

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

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

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

        return 1;
}
LSSL_ALIAS(SSL_set_num_tickets);

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

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

        return 1;
}
LSSL_ALIAS(SSL_CTX_set_num_tickets);

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

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

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

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

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

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

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

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

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;
}
LSSL_ALIAS(SSL_get_peer_certificate);

STACK_OF(X509) *
SSL_get_peer_cert_chain(const SSL *s)
{
        if (s == NULL)
                return NULL;

        /*
         * Achtung! Due to API inconsistency, a client includes the peer's leaf
         * certificate in the peer certificate chain, while a server does not.
         */
        if (!s->server)
                return s->s3->hs.peer_certs;

        return s->s3->hs.peer_certs_no_leaf;
}
LSSL_ALIAS(SSL_get_peer_cert_chain);

STACK_OF(X509) *
SSL_get0_verified_chain(const SSL *s)
{
        if (s->s3 == NULL)
                return NULL;
        return s->s3->hs.verified_chain;
}
LSSL_ALIAS(SSL_get0_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;
}
LSSL_ALIAS(SSL_copy_session_id);

/* 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)) {
                SSLerrorx(SSL_R_NO_CERTIFICATE_ASSIGNED);
                return (0);
        }
        if (ctx->cert->key->privatekey == NULL) {
                SSLerrorx(SSL_R_NO_PRIVATE_KEY_ASSIGNED);
                return (0);
        }
        return (X509_check_private_key(ctx->cert->key->x509,
            ctx->cert->key->privatekey));
}
LSSL_ALIAS(SSL_CTX_check_private_key);

/* 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));
}
LSSL_ALIAS(SSL_check_private_key);

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

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

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

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

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

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

static long
ssl_get_default_timeout(void)
{
        /*
         * 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());
}
LSSL_ALIAS(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 (SSL_is_quic(s)) {
                SSLerror(s, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
                return (-1);
        }

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

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

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;
}
LSSL_ALIAS(SSL_read_ex);

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

        if (SSL_is_quic(s)) {
                SSLerror(s, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
                return (-1);
        }

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

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

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;
}
LSSL_ALIAS(SSL_peek_ex);

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

        if (SSL_is_quic(s)) {
                SSLerror(s, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
                return (-1);
        }

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

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

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;
}
LSSL_ALIAS(SSL_write_ex);

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

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

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

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

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

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;
}
LSSL_ALIAS(SSL_read_early_data);

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;
}
LSSL_ALIAS(SSL_write_early_data);

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

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

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

        return (1);
}
LSSL_ALIAS(SSL_shutdown);

int
SSL_renegotiate(SSL *s)
{
        if ((s->options & SSL_OP_NO_RENEGOTIATION) != 0) {
                SSLerror(s, SSL_R_NO_RENEGOTIATION);
                return 0;
        }

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

        s->new_session = 1;

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

int
SSL_renegotiate_abbreviated(SSL *s)
{
        if ((s->options & SSL_OP_NO_RENEGOTIATION) != 0) {
                SSLerror(s, SSL_R_NO_RENEGOTIATION);
                return 0;
        }

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

        s->new_session = 0;

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

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

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:
                if (larg < (long)dtls1_min_mtu())
                        return (0);
                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);
        }
}
LSSL_ALIAS(SSL_ctrl);

long
SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void))
{
        switch (cmd) {
        case SSL_CTRL_SET_MSG_CALLBACK:
                s->msg_callback = (ssl_msg_callback_fn *)(fp);
                return (1);

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

struct lhash_st_SSL_SESSION *
SSL_CTX_sessions(SSL_CTX *ctx)
{
        return (ctx->sessions);
}
LSSL_ALIAS(SSL_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 (ssl3_ctx_ctrl(ctx, cmd, larg, parg));
        }
}
LSSL_ALIAS(SSL_CTX_ctrl);

long
SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void))
{
        switch (cmd) {
        case SSL_CTRL_SET_MSG_CALLBACK:
                ctx->msg_callback = (ssl_msg_callback_fn *)fp;
                return (1);

        default:
                return (ssl3_ctx_callback_ctrl(ctx, cmd, fp));
        }
}
LSSL_ALIAS(SSL_CTX_callback_ctrl);

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);
}
LSSL_ALIAS(SSL_get_ciphers);

STACK_OF(SSL_CIPHER) *
SSL_get_client_ciphers(const SSL *s)
{
        if (s == NULL || !s->server)
                return NULL;
        return s->s3->hs.client_ciphers;
}
LSSL_ALIAS(SSL_get_client_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;
}
LSSL_ALIAS(SSL_get1_supported_ciphers);

/* 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);
}
LSSL_ALIAS(SSL_get_cipher_list);

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

/* 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->cipher_list_tls13, str, ctx->cert);
        if (ciphers == NULL) {
                return (0);
        } else if (sk_SSL_CIPHER_num(ciphers) == 0) {
                SSLerrorx(SSL_R_NO_CIPHER_MATCH);
                return (0);
        }
        return (1);
}
LSSL_ALIAS(SSL_CTX_set_cipher_list);

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

        return 1;
}
LSSL_ALIAS(SSL_CTX_set_ciphersuites);

/* 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->cipher_list_tls13) == NULL)
                ciphers_tls13 = s->ctx->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);
}
LSSL_ALIAS(SSL_set_cipher_list);

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

        return 1;
}
LSSL_ALIAS(SSL_set_ciphersuites);

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 || len < 2)
                return NULL;

        if ((client_ciphers = s->s3->hs.client_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;
}
LSSL_ALIAS(SSL_get_shared_ciphers);

/*
 * 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);
}
LSSL_ALIAS(SSL_get_servername);

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);
}
LSSL_ALIAS(SSL_get_servername_type);

/*
 * 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.
 *
 * XXX - the out argument points into server_list or client_list and should
 * therefore really be const. We can't fix that without breaking the callers.
 */
int
SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
    const unsigned char *peer_list, unsigned int peer_list_len,
    const unsigned char *supported_list, unsigned int supported_list_len)
{
        CBS peer, peer_proto, supported, supported_proto;

        *out = NULL;
        *outlen = 0;

        /* First check that the supported list is well-formed. */
        CBS_init(&supported, supported_list, supported_list_len);
        if (!tlsext_alpn_check_format(&supported))
                goto err;

        /*
         * Use first supported protocol as fallback. This is one way of doing
         * NPN's "opportunistic" protocol selection (see security considerations
         * in draft-agl-tls-nextprotoneg-04), and it is the documented behavior
         * of this API. For ALPN it's the callback's responsibility to fail on
         * OPENSSL_NPN_NO_OVERLAP.
         */

        if (!CBS_get_u8_length_prefixed(&supported, &supported_proto))
                goto err;

        *out = (unsigned char *)CBS_data(&supported_proto);
        *outlen = CBS_len(&supported_proto);

        /* Now check that the peer list is well-formed. */
        CBS_init(&peer, peer_list, peer_list_len);
        if (!tlsext_alpn_check_format(&peer))
                goto err;

        /*
         * Walk the peer list and select the first protocol that appears in
         * the supported list. Thus we honor peer preference rather than local
         * preference contrary to a SHOULD in RFC 7301, section 3.2.
         */
        while (CBS_len(&peer) > 0) {
                if (!CBS_get_u8_length_prefixed(&peer, &peer_proto))
                        goto err;

                CBS_init(&supported, supported_list, supported_list_len);

                while (CBS_len(&supported) > 0) {
                        if (!CBS_get_u8_length_prefixed(&supported,
                            &supported_proto))
                                goto err;

                        if (CBS_mem_equal(&supported_proto,
                            CBS_data(&peer_proto), CBS_len(&peer_proto))) {
                                *out = (unsigned char *)CBS_data(&peer_proto);
                                *outlen = CBS_len(&peer_proto);

                                return OPENSSL_NPN_NEGOTIATED;
                        }
                }
        }

 err:
        return OPENSSL_NPN_NO_OVERLAP;
}
LSSL_ALIAS(SSL_select_next_proto);

/* 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;
}
LSSL_ALIAS(SSL_get0_next_proto_negotiated);

/* 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)
{
}
LSSL_ALIAS(SSL_CTX_set_next_protos_advertised_cb);

/* 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)
{
}
LSSL_ALIAS(SSL_CTX_set_next_proto_select_cb);

/*
 * 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->alpn_client_proto_list,
            &ctx->alpn_client_proto_list_len))
                goto err;

        failed = 0;

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

/*
 * 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->alpn_client_proto_list,
            &ssl->alpn_client_proto_list_len))
                goto err;

        failed = 0;

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

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

/*
 * 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;
}
LSSL_ALIAS(SSL_get0_alpn_selected);

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

int
SSL_export_keying_material(SSL *s, unsigned char *out, size_t out_len,
    const char *label, size_t label_len, const unsigned char *context,
    size_t context_len, int use_context)
{
        if (s->tls13 != NULL && s->version == TLS1_3_VERSION) {
                if (!use_context) {
                        context = NULL;
                        context_len = 0;
                }
                return tls13_exporter(s->tls13, label, label_len, context,
                    context_len, out, out_len);
        }

        return tls12_exporter(s, label, label_len, context, context_len,
            use_context, out, out_len);
}
LSSL_ALIAS(SSL_export_keying_material);

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

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

        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 = ssl_get_default_timeout();

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

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

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

        ret->info_callback = NULL;

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

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

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

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

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

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

        ret->extra_certs = NULL;

        ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH;

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

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

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

        /*
         * 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:
        SSLerrorx(ERR_R_MALLOC_FAILURE);
 err2:
        SSL_CTX_free(ret);
        return (NULL);
}
LSSL_ALIAS(SSL_CTX_new);

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

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

        lh_SSL_SESSION_free(ctx->sessions);

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

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

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

        free(ctx->alpn_client_proto_list);

        free(ctx);
}
LSSL_ALIAS(SSL_CTX_free);

int
SSL_CTX_up_ref(SSL_CTX *ctx)
{
        return CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX) > 1;
}
LSSL_ALIAS(SSL_CTX_up_ref);

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

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

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

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

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;
}
LSSL_ALIAS(SSL_CTX_set_cert_verify_callback);

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;
}
LSSL_ALIAS(SSL_CTX_set_verify);

void
SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth)
{
        X509_VERIFY_PARAM_set_depth(ctx->param, depth);
}
LSSL_ALIAS(SSL_CTX_set_verify_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_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_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->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->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->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->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->remove_session_cb != NULL)
                return 1;

        /* If we have set OP_NO_TICKET, cache it. */
        if ((s->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->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->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 (!(cache_mode & SSL_SESS_CACHE_NO_AUTO_CLEAR) &&
            (cache_mode & mode) != 0) {
                int connections;
                if (mode & SSL_SESS_CACHE_CLIENT)
                        connections = s->session_ctx->stats.sess_connect_good;
                else
                        connections = s->session_ctx->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);
}
LSSL_ALIAS(SSL_get_ssl_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->handshake_func == s->method->ssl_connect)
                handshake_func = method->ssl_connect;
        else if (s->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->handshake_func = handshake_func;

        return (ret);
}
LSSL_ALIAS(SSL_set_ssl_method);

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->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->shutdown & SSL_RECEIVED_SHUTDOWN) &&
            (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY))
                return (SSL_ERROR_ZERO_RETURN);

        return (SSL_ERROR_SYSCALL);
}
LSSL_ALIAS(SSL_get_error);

int
SSL_CTX_set_quic_method(SSL_CTX *ctx, const SSL_QUIC_METHOD *quic_method)
{
        if (ctx->method->dtls)
                return 0;

        ctx->quic_method = quic_method;

        return 1;
}
LSSL_ALIAS(SSL_CTX_set_quic_method);

int
SSL_set_quic_method(SSL *ssl, const SSL_QUIC_METHOD *quic_method)
{
        if (ssl->method->dtls)
                return 0;

        ssl->quic_method = quic_method;

        return 1;
}
LSSL_ALIAS(SSL_set_quic_method);

size_t
SSL_quic_max_handshake_flight_len(const SSL *ssl,
    enum ssl_encryption_level_t level)
{
        size_t flight_len;

        /* Limit flights to 16K when there are no large certificate messages. */
        flight_len = 16384;

        switch (level) {
        case ssl_encryption_initial:
                return flight_len;

        case ssl_encryption_early_data:
                /* QUIC does not send EndOfEarlyData. */
                return 0;

        case ssl_encryption_handshake:
                if (ssl->server) {
                        /*
                         * Servers may receive Certificate message if configured
                         * to request client certificates.
                         */
                        if ((SSL_get_verify_mode(ssl) & SSL_VERIFY_PEER) != 0 &&
                            ssl->max_cert_list > flight_len)
                                flight_len = ssl->max_cert_list;
                } else {
                        /*
                         * Clients may receive both Certificate message and a
                         * CertificateRequest message.
                         */
                        if (ssl->max_cert_list * 2 > flight_len)
                                flight_len = ssl->max_cert_list * 2;
                }
                return flight_len;
        case ssl_encryption_application:
                /*
                 * Note there is not actually a bound on the number of
                 * NewSessionTickets one may send in a row. This level may need
                 * more involved flow control.
                 */
                return flight_len;
        }

        return 0;
}
LSSL_ALIAS(SSL_quic_max_handshake_flight_len);

enum ssl_encryption_level_t
SSL_quic_read_level(const SSL *ssl)
{
        return ssl->s3->hs.tls13.quic_read_level;
}
LSSL_ALIAS(SSL_quic_read_level);

enum ssl_encryption_level_t
SSL_quic_write_level(const SSL *ssl)
{
        return ssl->s3->hs.tls13.quic_write_level;
}
LSSL_ALIAS(SSL_quic_write_level);

int
SSL_provide_quic_data(SSL *ssl, enum ssl_encryption_level_t level,
    const uint8_t *data, size_t len)
{
        if (!SSL_is_quic(ssl)) {
                SSLerror(ssl, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
                return 0;
        }

        if (level != SSL_quic_read_level(ssl)) {
                SSLerror(ssl, SSL_R_WRONG_ENCRYPTION_LEVEL_RECEIVED);
                return 0;
        }

        if (ssl->s3->hs.tls13.quic_read_buffer == NULL) {
                ssl->s3->hs.tls13.quic_read_buffer = tls_buffer_new(0);
                if (ssl->s3->hs.tls13.quic_read_buffer == NULL) {
                        SSLerror(ssl, ERR_R_MALLOC_FAILURE);
                        return 0;
                }
        }

        /* XXX - note that this does not currently downsize. */
        tls_buffer_set_capacity_limit(ssl->s3->hs.tls13.quic_read_buffer,
            SSL_quic_max_handshake_flight_len(ssl, level));

        /*
         * XXX - an append that fails due to exceeding capacity should set
         * SSL_R_EXCESSIVE_MESSAGE_SIZE.
         */
        return tls_buffer_append(ssl->s3->hs.tls13.quic_read_buffer, data, len);
}
LSSL_ALIAS(SSL_provide_quic_data);

int
SSL_process_quic_post_handshake(SSL *ssl)
{
        /* XXX - this needs to run PHH received. */
        return 1;
}
LSSL_ALIAS(SSL_process_quic_post_handshake);

int
SSL_do_handshake(SSL *s)
{
        if (s->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->handshake_func(s);
}
LSSL_ALIAS(SSL_do_handshake);

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

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

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);
}
LSSL_ALIAS(SSL_get_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->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));

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

        /* setup rbio, and wbio */
        if (s->rbio != NULL) {
                if (!BIO_dup_state(s->rbio,(char *)&ret->rbio))
                        goto err;
        }
        if (s->wbio != NULL) {
                if (s->wbio != s->rbio) {
                        if (!BIO_dup_state(s->wbio,(char *)&ret->wbio))
                                goto err;
                } else
                        ret->wbio = ret->rbio;
        }
        ret->rwstate = s->rwstate;
        ret->in_handshake = s->in_handshake;
        ret->handshake_func = s->handshake_func;
        ret->server = s->server;
        ret->renegotiate = s->renegotiate;
        ret->new_session = s->new_session;
        ret->quiet_shutdown = s->quiet_shutdown;
        ret->shutdown = s->shutdown;
        /* SSL_dup does not really work at any state, though */
        ret->s3->hs.state = s->s3->hs.state;
        ret->rstate = s->rstate;

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

        ret->hit = s->hit;

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

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

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

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

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

        if ((cb = s->info_callback) == NULL)
                cb = s->ctx->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->msg_callback == NULL)
                return;

        s->msg_callback(is_write, s->version, content_type,
            msg_buf, msg_len, s, s->msg_callback_arg);
}

void
ssl_msg_callback_cbs(SSL *s, int is_write, int content_type, CBS *cbs)
{
        ssl_msg_callback(s, is_write, content_type, CBS_data(cbs), CBS_len(cbs));
}

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

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

const SSL_CIPHER *
SSL_get_current_cipher(const SSL *s)
{
        return s->s3->hs.cipher;
}
LSSL_ALIAS(SSL_get_current_cipher);

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

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

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;
}
LSSL_ALIAS(SSL_get_client_random);

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;
}
LSSL_ALIAS(SSL_get_server_random);

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->quiet_shutdown = mode;
}
LSSL_ALIAS(SSL_CTX_set_quiet_shutdown);

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

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

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

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

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

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

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

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

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));
}
LSSL_ALIAS(SSL_CTX_load_verify_locations);

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

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

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

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

void
SSL_set_state(SSL *ssl, int state)
{
        ssl->s3->hs.state = state;
}
LSSL_ALIAS(SSL_set_state);

void
SSL_set_verify_result(SSL *ssl, long arg)
{
        ssl->verify_result = arg;
}
LSSL_ALIAS(SSL_set_verify_result);

long
SSL_get_verify_result(const SSL *ssl)
{
        return (ssl->verify_result);
}
LSSL_ALIAS(SSL_get_verify_result);

int
SSL_verify_client_post_handshake(SSL *ssl)
{
        return 0;
}
LSSL_ALIAS(SSL_verify_client_post_handshake);

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

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

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));
}
LSSL_ALIAS(SSL_get_ex_new_index);

int
SSL_set_ex_data(SSL *s, int idx, void *arg)
{
        return (CRYPTO_set_ex_data(&s->ex_data, idx, arg));
}
LSSL_ALIAS(SSL_set_ex_data);

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

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));
}
LSSL_ALIAS(SSL_CTX_get_ex_new_index);

int
SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg)
{
        return (CRYPTO_set_ex_data(&s->ex_data, idx, arg));
}
LSSL_ALIAS(SSL_CTX_set_ex_data);

void *
SSL_CTX_get_ex_data(const SSL_CTX *s, int idx)
{
        return (CRYPTO_get_ex_data(&s->ex_data, idx));
}
LSSL_ALIAS(SSL_CTX_get_ex_data);

int
ssl_ok(SSL *s)
{
        return (1);
}

X509_STORE *
SSL_CTX_get_cert_store(const SSL_CTX *ctx)
{
        return (ctx->cert_store);
}
LSSL_ALIAS(SSL_CTX_get_cert_store);

void
SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store)
{
        X509_STORE_free(ctx->cert_store);
        ctx->cert_store = store;
}
LSSL_ALIAS(SSL_CTX_set_cert_store);

void
SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store)
{
        if (store != NULL)
                X509_STORE_up_ref(store);

        SSL_CTX_set_cert_store(ctx, store);
}
LSSL_ALIAS(SSL_CTX_set1_cert_store);

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

        return ctx->cert->key->x509;
}
LSSL_ALIAS(SSL_CTX_get0_certificate);

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

        return ctx->cert->key->privatekey;
}
LSSL_ALIAS(SSL_CTX_get0_privatekey);

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

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);
}
LSSL_ALIAS(SSL_CTX_set_tmp_rsa_callback);

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);
}
LSSL_ALIAS(SSL_set_tmp_rsa_callback);

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);
}
LSSL_ALIAS(SSL_CTX_set_tmp_dh_callback);

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);
}
LSSL_ALIAS(SSL_set_tmp_dh_callback);

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);
}
LSSL_ALIAS(SSL_CTX_set_tmp_ecdh_callback);

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);
}
LSSL_ALIAS(SSL_set_tmp_ecdh_callback);


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);
}
LSSL_ALIAS(SSL_CTX_set_msg_callback);

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);
}
LSSL_ALIAS(SSL_set_msg_callback);

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

int
SSL_CTX_get_min_proto_version(SSL_CTX *ctx)
{
        return ctx->min_proto_version;
}
LSSL_ALIAS(SSL_CTX_get_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->max_tls_version, &ctx->min_tls_version,
            &ctx->min_proto_version);
}
LSSL_ALIAS(SSL_CTX_set_min_proto_version);

int
SSL_CTX_get_max_proto_version(SSL_CTX *ctx)
{
        return ctx->max_proto_version;
}
LSSL_ALIAS(SSL_CTX_get_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->min_tls_version, &ctx->max_tls_version,
            &ctx->max_proto_version);
}
LSSL_ALIAS(SSL_CTX_set_max_proto_version);

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

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

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

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

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

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

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

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

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

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

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

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

        return 1;
}
LSSL_ALIAS(SSL_set_quic_transport_params);

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;
}
LSSL_ALIAS(SSL_get_peer_quic_transport_params);

void
SSL_set_quic_use_legacy_codepoint(SSL *ssl, int use_legacy)
{
        /* Not supported. */
}
LSSL_ALIAS(SSL_set_quic_use_legacy_codepoint);