/* $OpenBSD: ssl.h,v 1.250 2026/04/03 13:11:00 jsing Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1998-2007 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 * ECC cipher suite support in OpenSSL originally developed by
 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 */
/* ====================================================================
 * Copyright 2005 Nokia. All rights reserved.
 *
 * The portions of the attached software ("Contribution") is developed by
 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
 * license.
 *
 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
 * support (see RFC 4279) to OpenSSL.
 *
 * No patent licenses or other rights except those expressly stated in
 * the OpenSSL open source license shall be deemed granted or received
 * expressly, by implication, estoppel, or otherwise.
 *
 * No assurances are provided by Nokia that the Contribution does not
 * infringe the patent or other intellectual property rights of any third
 * party or that the license provides you with all the necessary rights
 * to make use of the Contribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
 * OTHERWISE.
 */

#ifndef HEADER_SSL_H
#define HEADER_SSL_H

#include <stdint.h>

#include <openssl/opensslconf.h>

#include <openssl/hmac.h>
#include <openssl/pem.h>
#include <openssl/safestack.h>

#include <openssl/bio.h>

#ifndef OPENSSL_NO_DEPRECATED
#include <openssl/buffer.h>
#include <openssl/crypto.h>
#include <openssl/lhash.h>

#ifndef OPENSSL_NO_X509
#include <openssl/x509.h>
#endif
#endif

#ifdef  __cplusplus
extern "C" {
#endif

/* SSLeay version number for ASN.1 encoding of the session information */
/* Version 0 - initial version
 * Version 1 - added the optional peer certificate
 */
#define SSL_SESSION_ASN1_VERSION 0x0001

/* text strings for the ciphers */
#define SSL_TXT_NULL_WITH_MD5           SSL2_TXT_NULL_WITH_MD5
#define SSL_TXT_RC4_128_WITH_MD5        SSL2_TXT_RC4_128_WITH_MD5
#define SSL_TXT_RC4_128_EXPORT40_WITH_MD5 SSL2_TXT_RC4_128_EXPORT40_WITH_MD5
#define SSL_TXT_RC2_128_CBC_WITH_MD5    SSL2_TXT_RC2_128_CBC_WITH_MD5
#define SSL_TXT_RC2_128_CBC_EXPORT40_WITH_MD5 SSL2_TXT_RC2_128_CBC_EXPORT40_WITH_MD5
#define SSL_TXT_IDEA_128_CBC_WITH_MD5   SSL2_TXT_IDEA_128_CBC_WITH_MD5
#define SSL_TXT_DES_64_CBC_WITH_MD5     SSL2_TXT_DES_64_CBC_WITH_MD5
#define SSL_TXT_DES_64_CBC_WITH_SHA     SSL2_TXT_DES_64_CBC_WITH_SHA
#define SSL_TXT_DES_192_EDE3_CBC_WITH_MD5 SSL2_TXT_DES_192_EDE3_CBC_WITH_MD5
#define SSL_TXT_DES_192_EDE3_CBC_WITH_SHA SSL2_TXT_DES_192_EDE3_CBC_WITH_SHA

/*    VRS Additional Kerberos5 entries
 */
#define SSL_TXT_KRB5_RC4_128_SHA      SSL3_TXT_KRB5_RC4_128_SHA
#define SSL_TXT_KRB5_IDEA_128_CBC_SHA SSL3_TXT_KRB5_IDEA_128_CBC_SHA
#define SSL_TXT_KRB5_RC4_128_MD5      SSL3_TXT_KRB5_RC4_128_MD5
#define SSL_TXT_KRB5_IDEA_128_CBC_MD5 SSL3_TXT_KRB5_IDEA_128_CBC_MD5

#define SSL_TXT_KRB5_RC2_40_CBC_SHA   SSL3_TXT_KRB5_RC2_40_CBC_SHA
#define SSL_TXT_KRB5_RC4_40_SHA       SSL3_TXT_KRB5_RC4_40_SHA
#define SSL_TXT_KRB5_RC2_40_CBC_MD5   SSL3_TXT_KRB5_RC2_40_CBC_MD5
#define SSL_TXT_KRB5_RC4_40_MD5       SSL3_TXT_KRB5_RC4_40_MD5

#define SSL_TXT_KRB5_DES_40_CBC_SHA   SSL3_TXT_KRB5_DES_40_CBC_SHA
#define SSL_TXT_KRB5_DES_40_CBC_MD5   SSL3_TXT_KRB5_DES_40_CBC_MD5
#define SSL_TXT_KRB5_DES_64_CBC_SHA   SSL3_TXT_KRB5_DES_64_CBC_SHA
#define SSL_TXT_KRB5_DES_64_CBC_MD5   SSL3_TXT_KRB5_DES_64_CBC_MD5
#define SSL_TXT_KRB5_DES_192_CBC3_SHA SSL3_TXT_KRB5_DES_192_CBC3_SHA
#define SSL_TXT_KRB5_DES_192_CBC3_MD5 SSL3_TXT_KRB5_DES_192_CBC3_MD5
#define SSL_MAX_KRB5_PRINCIPAL_LENGTH  256

#define SSL_MAX_SSL_SESSION_ID_LENGTH           32
#define SSL_MAX_SID_CTX_LENGTH                  32

#define SSL_MIN_RSA_MODULUS_LENGTH_IN_BYTES     (512/8)
#define SSL_MAX_KEY_ARG_LENGTH                  8
#define SSL_MAX_MASTER_KEY_LENGTH               48


/* These are used to specify which ciphers to use and not to use */

#define SSL_TXT_LOW             "LOW"
#define SSL_TXT_MEDIUM          "MEDIUM"
#define SSL_TXT_HIGH            "HIGH"

#define SSL_TXT_kFZA            "kFZA" /* unused! */
#define SSL_TXT_aFZA            "aFZA" /* unused! */
#define SSL_TXT_eFZA            "eFZA" /* unused! */
#define SSL_TXT_FZA             "FZA"  /* unused! */

#define SSL_TXT_aNULL           "aNULL"
#define SSL_TXT_eNULL           "eNULL"
#define SSL_TXT_NULL            "NULL"

#define SSL_TXT_kRSA            "kRSA"
#define SSL_TXT_kDHr            "kDHr" /* no such ciphersuites supported! */
#define SSL_TXT_kDHd            "kDHd" /* no such ciphersuites supported! */
#define SSL_TXT_kDH             "kDH"  /* no such ciphersuites supported! */
#define SSL_TXT_kEDH            "kEDH"
#define SSL_TXT_kKRB5           "kKRB5"
#define SSL_TXT_kECDHr          "kECDHr"
#define SSL_TXT_kECDHe          "kECDHe"
#define SSL_TXT_kECDH           "kECDH"
#define SSL_TXT_kEECDH          "kEECDH"
#define SSL_TXT_kPSK            "kPSK"
#define SSL_TXT_kSRP            "kSRP"

#define SSL_TXT_aRSA            "aRSA"
#define SSL_TXT_aDSS            "aDSS"
#define SSL_TXT_aDH             "aDH" /* no such ciphersuites supported! */
#define SSL_TXT_aECDH           "aECDH"
#define SSL_TXT_aKRB5           "aKRB5"
#define SSL_TXT_aECDSA          "aECDSA"
#define SSL_TXT_aPSK            "aPSK"

#define SSL_TXT_DSS             "DSS"
#define SSL_TXT_DH              "DH"
#define SSL_TXT_DHE             "DHE" /* same as "kDHE:-ADH" */
#define SSL_TXT_EDH             "EDH" /* previous name for DHE */
#define SSL_TXT_ADH             "ADH"
#define SSL_TXT_RSA             "RSA"
#define SSL_TXT_ECDH            "ECDH"
#define SSL_TXT_ECDHE           "ECDHE" /* same as "kECDHE:-AECDH" */
#define SSL_TXT_EECDH           "EECDH" /* previous name for ECDHE */
#define SSL_TXT_AECDH           "AECDH"
#define SSL_TXT_ECDSA           "ECDSA"
#define SSL_TXT_KRB5            "KRB5"
#define SSL_TXT_PSK             "PSK"
#define SSL_TXT_SRP             "SRP"

#define SSL_TXT_DES             "DES"
#define SSL_TXT_3DES            "3DES"
#define SSL_TXT_RC4             "RC4"
#define SSL_TXT_RC2             "RC2"
#define SSL_TXT_IDEA            "IDEA"
#define SSL_TXT_SEED            "SEED"
#define SSL_TXT_AES128          "AES128"
#define SSL_TXT_AES256          "AES256"
#define SSL_TXT_AES             "AES"
#define SSL_TXT_AES_GCM         "AESGCM"
#define SSL_TXT_CAMELLIA128     "CAMELLIA128"
#define SSL_TXT_CAMELLIA256     "CAMELLIA256"
#define SSL_TXT_CAMELLIA        "CAMELLIA"
#define SSL_TXT_CHACHA20        "CHACHA20"

#define SSL_TXT_AEAD            "AEAD"
#define SSL_TXT_MD5             "MD5"
#define SSL_TXT_SHA1            "SHA1"
#define SSL_TXT_SHA             "SHA" /* same as "SHA1" */
#define SSL_TXT_SHA256          "SHA256"
#define SSL_TXT_SHA384          "SHA384"

#define SSL_TXT_DTLS1           "DTLSv1"
#define SSL_TXT_DTLS1_2         "DTLSv1.2"
#define SSL_TXT_SSLV2           "SSLv2"
#define SSL_TXT_SSLV3           "SSLv3"
#define SSL_TXT_TLSV1           "TLSv1"
#define SSL_TXT_TLSV1_1         "TLSv1.1"
#define SSL_TXT_TLSV1_2         "TLSv1.2"
#if defined(LIBRESSL_HAS_TLS1_3) || defined(LIBRESSL_INTERNAL)
#define SSL_TXT_TLSV1_3         "TLSv1.3"
#endif

#define SSL_TXT_EXP             "EXP"
#define SSL_TXT_EXPORT          "EXPORT"

#define SSL_TXT_ALL             "ALL"

/*
 * COMPLEMENTOF* definitions. These identifiers are used to (de-select)
 * ciphers normally not being used.
 * Example: "RC4" will activate all ciphers using RC4 including ciphers
 * without authentication, which would normally disabled by DEFAULT (due
 * the "!ADH" being part of default). Therefore "RC4:!COMPLEMENTOFDEFAULT"
 * will make sure that it is also disabled in the specific selection.
 * COMPLEMENTOF* identifiers are portable between version, as adjustments
 * to the default cipher setup will also be included here.
 *
 * COMPLEMENTOFDEFAULT does not experience the same special treatment that
 * DEFAULT gets, as only selection is being done and no sorting as needed
 * for DEFAULT.
 */
#define SSL_TXT_CMPALL          "COMPLEMENTOFALL"
#define SSL_TXT_CMPDEF          "COMPLEMENTOFDEFAULT"

/* The following cipher list is used by default.
 * It also is substituted when an application-defined cipher list string
 * starts with 'DEFAULT'. */
#define SSL_DEFAULT_CIPHER_LIST "ALL:!aNULL:!eNULL:!SSLv2"
/* As of OpenSSL 1.0.0, ssl_create_cipher_list() in ssl/ssl_ciph.c always
 * starts with a reasonable order, and all we have to do for DEFAULT is
 * throwing out anonymous and unencrypted ciphersuites!
 * (The latter are not actually enabled by ALL, but "ALL:RSA" would enable
 * some of them.)
 */

/* Used in SSL_set_shutdown()/SSL_get_shutdown(); */
#define SSL_SENT_SHUTDOWN       1
#define SSL_RECEIVED_SHUTDOWN   2


#define SSL_FILETYPE_ASN1       X509_FILETYPE_ASN1
#define SSL_FILETYPE_PEM        X509_FILETYPE_PEM

/* This is needed to stop compilers complaining about the
 * 'struct ssl_st *' function parameters used to prototype callbacks
 * in SSL_CTX. */
typedef struct ssl_st *ssl_crock_st;

typedef struct ssl_method_st SSL_METHOD;
typedef struct ssl_cipher_st SSL_CIPHER;
typedef struct ssl_session_st SSL_SESSION;

#if defined(LIBRESSL_HAS_QUIC) || defined(LIBRESSL_INTERNAL)
typedef struct ssl_quic_method_st SSL_QUIC_METHOD;
#endif

DECLARE_STACK_OF(SSL_CIPHER)

/* SRTP protection profiles for use with the use_srtp extension (RFC 5764)*/
typedef struct srtp_protection_profile_st {
        const char *name;
        unsigned long id;
} SRTP_PROTECTION_PROFILE;

DECLARE_STACK_OF(SRTP_PROTECTION_PROFILE)

typedef int (*tls_session_ticket_ext_cb_fn)(SSL *s, const unsigned char *data,
    int len, void *arg);
typedef int (*tls_session_secret_cb_fn)(SSL *s, void *secret, int *secret_len,
    STACK_OF(SSL_CIPHER) *peer_ciphers, const SSL_CIPHER **cipher, void *arg);

/* Allow initial connection to servers that don't support RI */
#define SSL_OP_LEGACY_SERVER_CONNECT                    0x00000004L

/* DTLS options */
#define SSL_OP_NO_QUERY_MTU                             0x00001000L
/* Turn on Cookie Exchange (on relevant for servers) */
#define SSL_OP_COOKIE_EXCHANGE                          0x00002000L
/* Don't use RFC4507 ticket extension */
#define SSL_OP_NO_TICKET                                0x00004000L

/* As server, disallow session resumption on renegotiation */
#define SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION   0x00010000L
/* Disallow client initiated renegotiation. */
#define SSL_OP_NO_CLIENT_RENEGOTIATION                  0x00020000L
/* Disallow client and server initiated renegotiation. */
#define SSL_OP_NO_RENEGOTIATION                         0x00040000L
/* Allow client initiated renegotiation. */
#define SSL_OP_ALLOW_CLIENT_RENEGOTIATION               0x00080000L
/* If set, always create a new key when using tmp_dh parameters */
#define SSL_OP_SINGLE_DH_USE                            0x00100000L
/* Set on servers to choose the cipher according to the server's
 * preferences */
#define SSL_OP_CIPHER_SERVER_PREFERENCE                 0x00400000L

#define SSL_OP_NO_TLSv1                                 0x04000000L
#define SSL_OP_NO_TLSv1_2                               0x08000000L
#define SSL_OP_NO_TLSv1_1                               0x10000000L

#if defined(LIBRESSL_HAS_TLS1_3) || defined(LIBRESSL_INTERNAL)
#define SSL_OP_NO_TLSv1_3                               0x20000000L
#endif

#define SSL_OP_NO_DTLSv1                                0x40000000L
#define SSL_OP_NO_DTLSv1_2                              0x80000000L

/* SSL_OP_ALL: various bug workarounds that should be rather harmless. */
#define SSL_OP_ALL \
    (SSL_OP_LEGACY_SERVER_CONNECT)

/* Obsolete flags kept for compatibility. No sane code should use them. */
#define SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION        0x0
#define SSL_OP_CISCO_ANYCONNECT                         0x0
#define SSL_OP_CRYPTOPRO_TLSEXT_BUG                     0x0
#define SSL_OP_EPHEMERAL_RSA                            0x0
#define SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER               0x0
#define SSL_OP_MICROSOFT_SESS_ID_BUG                    0x0
#define SSL_OP_MSIE_SSLV2_RSA_PADDING                   0x0
#define SSL_OP_NETSCAPE_CA_DN_BUG                       0x0
#define SSL_OP_NETSCAPE_CHALLENGE_BUG                   0x0
#define SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG          0x0
#define SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG         0x0
#define SSL_OP_NO_COMPRESSION                           0x0
#define SSL_OP_NO_SSLv2                                 0x0
#define SSL_OP_NO_SSLv3                                 0x0
#define SSL_OP_PKCS1_CHECK_1                            0x0
#define SSL_OP_PKCS1_CHECK_2                            0x0
#define SSL_OP_SAFARI_ECDHE_ECDSA_BUG                   0x0
#define SSL_OP_SINGLE_ECDH_USE                          0x0
#define SSL_OP_SSLEAY_080_CLIENT_DH_BUG                 0x0
#define SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG              0x0
#define SSL_OP_TLSEXT_PADDING                           0x0
#define SSL_OP_TLS_BLOCK_PADDING_BUG                    0x0
#define SSL_OP_TLS_D5_BUG                               0x0
#define SSL_OP_TLS_ROLLBACK_BUG                         0x0
#define SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS              0x0

/* Allow SSL_write(..., n) to return r with 0 < r < n (i.e. report success
 * when just a single record has been written): */
#define SSL_MODE_ENABLE_PARTIAL_WRITE       0x00000001L
/* Make it possible to retry SSL_write() with changed buffer location
 * (buffer contents must stay the same!); this is not the default to avoid
 * the misconception that non-blocking SSL_write() behaves like
 * non-blocking write(): */
#define SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER 0x00000002L
/* Never bother the application with retries if the transport
 * is blocking: */
#define SSL_MODE_AUTO_RETRY 0x00000004L
/* Don't attempt to automatically build certificate chain */
#define SSL_MODE_NO_AUTO_CHAIN 0x00000008L
/* Save RAM by releasing read and write buffers when they're empty. (SSL3 and
 * TLS only.)  "Released" buffers are put onto a free-list in the context
 * or just freed (depending on the context's setting for freelist_max_len). */
#define SSL_MODE_RELEASE_BUFFERS 0x00000010L

/* Note: SSL[_CTX]_set_{options,mode} use |= op on the previous value,
 * they cannot be used to clear bits. */

#define SSL_CTX_set_options(ctx,op) \
        SSL_CTX_ctrl((ctx),SSL_CTRL_OPTIONS,(op),NULL)
#define SSL_CTX_clear_options(ctx,op) \
        SSL_CTX_ctrl((ctx),SSL_CTRL_CLEAR_OPTIONS,(op),NULL)
#define SSL_CTX_get_options(ctx) \
        SSL_CTX_ctrl((ctx),SSL_CTRL_OPTIONS,0,NULL)
#define SSL_set_options(ssl,op) \
        SSL_ctrl((ssl),SSL_CTRL_OPTIONS,(op),NULL)
#define SSL_clear_options(ssl,op) \
        SSL_ctrl((ssl),SSL_CTRL_CLEAR_OPTIONS,(op),NULL)
#define SSL_get_options(ssl) \
        SSL_ctrl((ssl),SSL_CTRL_OPTIONS,0,NULL)

#define SSL_CTX_set_mode(ctx,op) \
        SSL_CTX_ctrl((ctx),SSL_CTRL_MODE,(op),NULL)
#define SSL_CTX_clear_mode(ctx,op) \
        SSL_CTX_ctrl((ctx),SSL_CTRL_CLEAR_MODE,(op),NULL)
#define SSL_CTX_get_mode(ctx) \
        SSL_CTX_ctrl((ctx),SSL_CTRL_MODE,0,NULL)
#define SSL_clear_mode(ssl,op) \
        SSL_ctrl((ssl),SSL_CTRL_CLEAR_MODE,(op),NULL)
#define SSL_set_mode(ssl,op) \
        SSL_ctrl((ssl),SSL_CTRL_MODE,(op),NULL)
#define SSL_get_mode(ssl) \
        SSL_ctrl((ssl),SSL_CTRL_MODE,0,NULL)
#define SSL_set_mtu(ssl, mtu) \
        SSL_ctrl((ssl),SSL_CTRL_SET_MTU,(mtu),NULL)

#define SSL_get_secure_renegotiation_support(ssl) \
        SSL_ctrl((ssl), SSL_CTRL_GET_RI_SUPPORT, 0, NULL)

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));
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));
#define SSL_CTX_set_msg_callback_arg(ctx, arg) SSL_CTX_ctrl((ctx), SSL_CTRL_SET_MSG_CALLBACK_ARG, 0, (arg))
#define SSL_set_msg_callback_arg(ssl, arg) SSL_ctrl((ssl), SSL_CTRL_SET_MSG_CALLBACK_ARG, 0, (arg))
typedef void (*SSL_CTX_keylog_cb_func)(const SSL *ssl, const char *line);
void SSL_CTX_set_keylog_callback(SSL_CTX *ctx, SSL_CTX_keylog_cb_func cb);
SSL_CTX_keylog_cb_func SSL_CTX_get_keylog_callback(const SSL_CTX *ctx);
int SSL_set_num_tickets(SSL *s, size_t num_tickets);
size_t SSL_get_num_tickets(const SSL *s);
int SSL_CTX_set_num_tickets(SSL_CTX *ctx, size_t num_tickets);
size_t SSL_CTX_get_num_tickets(const SSL_CTX *ctx);
STACK_OF(X509) *SSL_get0_verified_chain(const SSL *s);

#define SSL_MAX_CERT_LIST_DEFAULT 1024*100 /* 100k max cert list :-) */

#define SSL_SESSION_CACHE_MAX_SIZE_DEFAULT      (1024*20)

/* This callback type is used inside SSL_CTX, SSL, and in the functions that set
 * them. It is used to override the generation of SSL/TLS session IDs in a
 * server. Return value should be zero on an error, non-zero to proceed. Also,
 * callbacks should themselves check if the id they generate is unique otherwise
 * the SSL handshake will fail with an error - callbacks can do this using the
 * 'ssl' value they're passed by;
 *      SSL_has_matching_session_id(ssl, id, *id_len)
 * The length value passed in is set at the maximum size the session ID can be.
 * In SSLv2 this is 16 bytes, whereas SSLv3/TLSv1 it is 32 bytes. The callback
 * can alter this length to be less if desired, but under SSLv2 session IDs are
 * supposed to be fixed at 16 bytes so the id will be padded after the callback
 * returns in this case. It is also an error for the callback to set the size to
 * zero. */
typedef int (*GEN_SESSION_CB)(const SSL *ssl, unsigned char *id,
    unsigned int *id_len);

typedef struct ssl_comp_st SSL_COMP;

#ifdef LIBRESSL_INTERNAL
DECLARE_STACK_OF(SSL_COMP)
struct lhash_st_SSL_SESSION {
        int dummy;
};
#endif

#define SSL_SESS_CACHE_OFF                      0x0000
#define SSL_SESS_CACHE_CLIENT                   0x0001
#define SSL_SESS_CACHE_SERVER                   0x0002
#define SSL_SESS_CACHE_BOTH     (SSL_SESS_CACHE_CLIENT|SSL_SESS_CACHE_SERVER)
#define SSL_SESS_CACHE_NO_AUTO_CLEAR            0x0080
/* enough comments already ... see SSL_CTX_set_session_cache_mode(3) */
#define SSL_SESS_CACHE_NO_INTERNAL_LOOKUP       0x0100
#define SSL_SESS_CACHE_NO_INTERNAL_STORE        0x0200
#define SSL_SESS_CACHE_NO_INTERNAL \
        (SSL_SESS_CACHE_NO_INTERNAL_LOOKUP|SSL_SESS_CACHE_NO_INTERNAL_STORE)

struct lhash_st_SSL_SESSION *SSL_CTX_sessions(SSL_CTX *ctx);
#define SSL_CTX_sess_number(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_NUMBER,0,NULL)
#define SSL_CTX_sess_connect(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_CONNECT,0,NULL)
#define SSL_CTX_sess_connect_good(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_CONNECT_GOOD,0,NULL)
#define SSL_CTX_sess_connect_renegotiate(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_CONNECT_RENEGOTIATE,0,NULL)
#define SSL_CTX_sess_accept(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_ACCEPT,0,NULL)
#define SSL_CTX_sess_accept_renegotiate(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_ACCEPT_RENEGOTIATE,0,NULL)
#define SSL_CTX_sess_accept_good(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_ACCEPT_GOOD,0,NULL)
#define SSL_CTX_sess_hits(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_HIT,0,NULL)
#define SSL_CTX_sess_cb_hits(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_CB_HIT,0,NULL)
#define SSL_CTX_sess_misses(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_MISSES,0,NULL)
#define SSL_CTX_sess_timeouts(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_TIMEOUTS,0,NULL)
#define SSL_CTX_sess_cache_full(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SESS_CACHE_FULL,0,NULL)

void SSL_CTX_sess_set_new_cb(SSL_CTX *ctx,
    int (*new_session_cb)(struct ssl_st *ssl, SSL_SESSION *sess));
int (*SSL_CTX_sess_get_new_cb(SSL_CTX *ctx))(struct ssl_st *ssl,
    SSL_SESSION *sess);
void SSL_CTX_sess_set_remove_cb(SSL_CTX *ctx,
    void (*remove_session_cb)(struct ssl_ctx_st *ctx, SSL_SESSION *sess));
void (*SSL_CTX_sess_get_remove_cb(SSL_CTX *ctx))(struct ssl_ctx_st *ctx,
    SSL_SESSION *sess);
void SSL_CTX_sess_set_get_cb(SSL_CTX *ctx,
    SSL_SESSION *(*get_session_cb)(struct ssl_st *ssl,
    const unsigned char *data, int len, int *copy));
SSL_SESSION *(*SSL_CTX_sess_get_get_cb(SSL_CTX *ctx))(struct ssl_st *ssl,
    const unsigned char *data, int len, int *copy);
void SSL_CTX_set_info_callback(SSL_CTX *ctx, void (*cb)(const SSL *ssl,
    int type, int val));
void (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(const SSL *ssl, int type,
    int val);
void SSL_CTX_set_client_cert_cb(SSL_CTX *ctx,
    int (*client_cert_cb)(SSL *ssl, X509 **x509, EVP_PKEY **pkey));
int (*SSL_CTX_get_client_cert_cb(SSL_CTX *ctx))(SSL *ssl, X509 **x509,
    EVP_PKEY **pkey);
void SSL_CTX_set_cookie_generate_cb(SSL_CTX *ctx,
    int (*app_gen_cookie_cb)(SSL *ssl, unsigned char *cookie,
    unsigned int *cookie_len));
void SSL_CTX_set_cookie_verify_cb(SSL_CTX *ctx,
    int (*app_verify_cookie_cb)(SSL *ssl, const unsigned char *cookie,
    unsigned int cookie_len));
void SSL_CTX_set_next_protos_advertised_cb(SSL_CTX *s, int (*cb)(SSL *ssl,
    const unsigned char **out, unsigned int *outlen, void *arg), void *arg);
void SSL_CTX_set_next_proto_select_cb(SSL_CTX *s, int (*cb)(SSL *ssl,
    unsigned char **out, unsigned char *outlen, const unsigned char *in,
    unsigned int inlen, void *arg), void *arg);

int SSL_select_next_proto(unsigned char **out, unsigned char *outlen,
    const unsigned char *in, unsigned int inlen, const unsigned char *client,
    unsigned int client_len);
void SSL_get0_next_proto_negotiated(const SSL *s, const unsigned char **data,
    unsigned int *len);

#define OPENSSL_NPN_UNSUPPORTED 0
#define OPENSSL_NPN_NEGOTIATED  1
#define OPENSSL_NPN_NO_OVERLAP  2

int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const unsigned char *protos,
    unsigned int protos_len);
int SSL_set_alpn_protos(SSL *ssl, const unsigned char *protos,
    unsigned int protos_len);
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);
void SSL_get0_alpn_selected(const SSL *ssl, const unsigned char **data,
    unsigned int *len);

#if defined(LIBRESSL_HAS_TLS1_3) || defined(LIBRESSL_INTERNAL)
typedef int (*SSL_psk_use_session_cb_func)(SSL *ssl, const EVP_MD *md,
    const unsigned char **id, size_t *idlen, SSL_SESSION **sess);
void SSL_set_psk_use_session_callback(SSL *s, SSL_psk_use_session_cb_func cb);
#endif

#define SSL_NOTHING     1
#define SSL_WRITING     2
#define SSL_READING     3
#define SSL_X509_LOOKUP 4

/* These will only be used when doing non-blocking IO */
#define SSL_want_nothing(s)     (SSL_want(s) == SSL_NOTHING)
#define SSL_want_read(s)        (SSL_want(s) == SSL_READING)
#define SSL_want_write(s)       (SSL_want(s) == SSL_WRITING)
#define SSL_want_x509_lookup(s) (SSL_want(s) == SSL_X509_LOOKUP)

#define SSL_MAC_FLAG_READ_MAC_STREAM 1
#define SSL_MAC_FLAG_WRITE_MAC_STREAM 2

#ifdef __cplusplus
}
#endif

#include <openssl/ssl3.h>
#include <openssl/tls1.h>       /* This is mostly sslv3 with a few tweaks */
#include <openssl/dtls1.h>      /* Datagram TLS */
#include <openssl/srtp.h>       /* Support for the use_srtp extension */

#ifdef  __cplusplus
extern "C" {
#endif

/* compatibility */
#define SSL_set_app_data(s,arg)         (SSL_set_ex_data(s,0,(char *)arg))
#define SSL_get_app_data(s)             (SSL_get_ex_data(s,0))
#define SSL_SESSION_set_app_data(s,a)   (SSL_SESSION_set_ex_data(s,0,(char *)a))
#define SSL_SESSION_get_app_data(s)     (SSL_SESSION_get_ex_data(s,0))
#define SSL_CTX_get_app_data(ctx)       (SSL_CTX_get_ex_data(ctx,0))
#define SSL_CTX_set_app_data(ctx,arg)   (SSL_CTX_set_ex_data(ctx,0,(char *)arg))

/* The following are the possible values for ssl->state are are
 * used to indicate where we are up to in the SSL connection establishment.
 * The macros that follow are about the only things you should need to use
 * and even then, only when using non-blocking IO.
 * It can also be useful to work out where you were when the connection
 * failed */

#define SSL_ST_CONNECT                  0x1000
#define SSL_ST_ACCEPT                   0x2000
#define SSL_ST_MASK                     0x0FFF
#define SSL_ST_INIT                     (SSL_ST_CONNECT|SSL_ST_ACCEPT)
#define SSL_ST_BEFORE                   0x4000
#define SSL_ST_OK                       0x03
#define SSL_ST_RENEGOTIATE              (0x04|SSL_ST_INIT)

#define SSL_CB_LOOP                     0x01
#define SSL_CB_EXIT                     0x02
#define SSL_CB_READ                     0x04
#define SSL_CB_WRITE                    0x08
#define SSL_CB_ALERT                    0x4000 /* used in callback */
#define SSL_CB_READ_ALERT               (SSL_CB_ALERT|SSL_CB_READ)
#define SSL_CB_WRITE_ALERT              (SSL_CB_ALERT|SSL_CB_WRITE)
#define SSL_CB_ACCEPT_LOOP              (SSL_ST_ACCEPT|SSL_CB_LOOP)
#define SSL_CB_ACCEPT_EXIT              (SSL_ST_ACCEPT|SSL_CB_EXIT)
#define SSL_CB_CONNECT_LOOP             (SSL_ST_CONNECT|SSL_CB_LOOP)
#define SSL_CB_CONNECT_EXIT             (SSL_ST_CONNECT|SSL_CB_EXIT)
#define SSL_CB_HANDSHAKE_START          0x10
#define SSL_CB_HANDSHAKE_DONE           0x20

/* Is the SSL_connection established? */
#define SSL_get_state(a)                (SSL_state((a)))
#define SSL_is_init_finished(a)         (SSL_state((a)) == SSL_ST_OK)
#define SSL_in_init(a)                  (SSL_state((a))&SSL_ST_INIT)
#define SSL_in_before(a)                (SSL_state((a))&SSL_ST_BEFORE)
#define SSL_in_connect_init(a)          (SSL_state((a))&SSL_ST_CONNECT)
#define SSL_in_accept_init(a)           (SSL_state((a))&SSL_ST_ACCEPT)

/* The following 2 states are kept in ssl->rstate when reads fail,
 * you should not need these */
#define SSL_ST_READ_HEADER              0xF0
#define SSL_ST_READ_BODY                0xF1
#define SSL_ST_READ_DONE                0xF2

/* Obtain latest Finished message
 *   -- that we sent (SSL_get_finished)
 *   -- that we expected from peer (SSL_get_peer_finished).
 * Returns length (0 == no Finished so far), copies up to 'count' bytes. */
size_t SSL_get_finished(const SSL *s, void *buf, size_t count);
size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count);

/* use either SSL_VERIFY_NONE or SSL_VERIFY_PEER, the last 2 options
 * are 'ored' with SSL_VERIFY_PEER if they are desired */
#define SSL_VERIFY_NONE                 0x00
#define SSL_VERIFY_PEER                 0x01
#define SSL_VERIFY_FAIL_IF_NO_PEER_CERT 0x02
#define SSL_VERIFY_CLIENT_ONCE          0x04
#if defined(LIBRESSL_HAS_TLS1_3) || defined(LIBRESSL_INTERNAL)
#define SSL_VERIFY_POST_HANDSHAKE       0x08

int SSL_verify_client_post_handshake(SSL *s);
void SSL_CTX_set_post_handshake_auth(SSL_CTX *ctx, int val);
void SSL_set_post_handshake_auth(SSL *s, int val);
#endif

#define OpenSSL_add_ssl_algorithms()    SSL_library_init()
#define SSLeay_add_ssl_algorithms()     SSL_library_init()

/* More backward compatibility */
#define SSL_get_cipher(s) \
                SSL_CIPHER_get_name(SSL_get_current_cipher(s))
#define SSL_get_cipher_bits(s,np) \
                SSL_CIPHER_get_bits(SSL_get_current_cipher(s),np)
#define SSL_get_cipher_version(s) \
                SSL_CIPHER_get_version(SSL_get_current_cipher(s))
#define SSL_get_cipher_name(s) \
                SSL_CIPHER_get_name(SSL_get_current_cipher(s))
#define SSL_get_time(a)         SSL_SESSION_get_time(a)
#define SSL_set_time(a,b)       SSL_SESSION_set_time((a),(b))
#define SSL_get_timeout(a)      SSL_SESSION_get_timeout(a)
#define SSL_set_timeout(a,b)    SSL_SESSION_set_timeout((a),(b))

#define d2i_SSL_SESSION_bio(bp,s_id) ASN1_d2i_bio_of(SSL_SESSION,SSL_SESSION_new,d2i_SSL_SESSION,bp,s_id)
#define i2d_SSL_SESSION_bio(bp,s_id) ASN1_i2d_bio_of(SSL_SESSION,i2d_SSL_SESSION,bp,s_id)

SSL_SESSION *PEM_read_bio_SSL_SESSION(BIO *bp, SSL_SESSION **x,
    pem_password_cb *cb, void *u);
SSL_SESSION *PEM_read_SSL_SESSION(FILE *fp, SSL_SESSION **x,
    pem_password_cb *cb, void *u);
int PEM_write_bio_SSL_SESSION(BIO *bp, SSL_SESSION *x);
int PEM_write_SSL_SESSION(FILE *fp, SSL_SESSION *x);

/*
 * TLS Alerts.
 *
 * https://www.iana.org/assignments/tls-parameters/#tls-parameters-6
 */

/* Obsolete alerts. */
#ifndef LIBRESSL_INTERNAL
#define SSL_AD_DECRYPTION_FAILED                21      /* Removed in TLSv1.1 */
#define SSL_AD_NO_CERTIFICATE                   41      /* Removed in TLSv1.0 */
#define SSL_AD_EXPORT_RESTRICTION               60      /* Removed in TLSv1.1 */
#endif

#define SSL_AD_CLOSE_NOTIFY                     0
#define SSL_AD_UNEXPECTED_MESSAGE               10
#define SSL_AD_BAD_RECORD_MAC                   20
#define SSL_AD_RECORD_OVERFLOW                  22
#define SSL_AD_DECOMPRESSION_FAILURE            30      /* Removed in TLSv1.3 */
#define SSL_AD_HANDSHAKE_FAILURE                40
#define SSL_AD_BAD_CERTIFICATE                  42
#define SSL_AD_UNSUPPORTED_CERTIFICATE          43
#define SSL_AD_CERTIFICATE_REVOKED              44
#define SSL_AD_CERTIFICATE_EXPIRED              45
#define SSL_AD_CERTIFICATE_UNKNOWN              46
#define SSL_AD_ILLEGAL_PARAMETER                47
#define SSL_AD_UNKNOWN_CA                       48
#define SSL_AD_ACCESS_DENIED                    49
#define SSL_AD_DECODE_ERROR                     50
#define SSL_AD_DECRYPT_ERROR                    51
#define SSL_AD_PROTOCOL_VERSION                 70
#define SSL_AD_INSUFFICIENT_SECURITY            71
#define SSL_AD_INTERNAL_ERROR                   80
#define SSL_AD_INAPPROPRIATE_FALLBACK           86
#define SSL_AD_USER_CANCELLED                   90
#define SSL_AD_NO_RENEGOTIATION                 100     /* Removed in TLSv1.3 */
#define SSL_AD_MISSING_EXTENSION                109     /* Added in TLSv1.3. */
#define SSL_AD_UNSUPPORTED_EXTENSION            110
#define SSL_AD_CERTIFICATE_UNOBTAINABLE         111     /* Removed in TLSv1.3 */
#define SSL_AD_UNRECOGNIZED_NAME                112
#define SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE  113
#define SSL_AD_BAD_CERTIFICATE_HASH_VALUE       114     /* Removed in TLSv1.3 */
#define SSL_AD_UNKNOWN_PSK_IDENTITY             115
#define SSL_AD_CERTIFICATE_REQUIRED             116
#define SSL_AD_NO_APPLICATION_PROTOCOL          120

/* Offset to get an SSL_R_... value from an SSL_AD_... value. */
#define SSL_AD_REASON_OFFSET                    1000

#define SSL_ERROR_NONE                          0
#define SSL_ERROR_SSL                           1
#define SSL_ERROR_WANT_READ                     2
#define SSL_ERROR_WANT_WRITE                    3
#define SSL_ERROR_WANT_X509_LOOKUP              4
#define SSL_ERROR_SYSCALL                       5
#define SSL_ERROR_ZERO_RETURN                   6
#define SSL_ERROR_WANT_CONNECT                  7
#define SSL_ERROR_WANT_ACCEPT                   8
#define SSL_ERROR_WANT_ASYNC                    9
#define SSL_ERROR_WANT_ASYNC_JOB                10
#define SSL_ERROR_WANT_CLIENT_HELLO_CB          11

#define SSL_CTRL_NEED_TMP_RSA                   1
#define SSL_CTRL_SET_TMP_RSA                    2
#define SSL_CTRL_SET_TMP_DH                     3
#define SSL_CTRL_SET_TMP_ECDH                   4
#define SSL_CTRL_SET_TMP_RSA_CB                 5
#define SSL_CTRL_SET_TMP_DH_CB                  6
#define SSL_CTRL_SET_TMP_ECDH_CB                7

#define SSL_CTRL_GET_SESSION_REUSED             8
#define SSL_CTRL_GET_CLIENT_CERT_REQUEST        9
#define SSL_CTRL_GET_NUM_RENEGOTIATIONS         10
#define SSL_CTRL_CLEAR_NUM_RENEGOTIATIONS       11
#define SSL_CTRL_GET_TOTAL_RENEGOTIATIONS       12
#define SSL_CTRL_GET_FLAGS                      13
#define SSL_CTRL_EXTRA_CHAIN_CERT               14

#define SSL_CTRL_SET_MSG_CALLBACK               15
#define SSL_CTRL_SET_MSG_CALLBACK_ARG           16

/* only applies to datagram connections */
#define SSL_CTRL_SET_MTU                17
/* Stats */
#define SSL_CTRL_SESS_NUMBER                    20
#define SSL_CTRL_SESS_CONNECT                   21
#define SSL_CTRL_SESS_CONNECT_GOOD              22
#define SSL_CTRL_SESS_CONNECT_RENEGOTIATE       23
#define SSL_CTRL_SESS_ACCEPT                    24
#define SSL_CTRL_SESS_ACCEPT_GOOD               25
#define SSL_CTRL_SESS_ACCEPT_RENEGOTIATE        26
#define SSL_CTRL_SESS_HIT                       27
#define SSL_CTRL_SESS_CB_HIT                    28
#define SSL_CTRL_SESS_MISSES                    29
#define SSL_CTRL_SESS_TIMEOUTS                  30
#define SSL_CTRL_SESS_CACHE_FULL                31
#define SSL_CTRL_OPTIONS                        32
#define SSL_CTRL_MODE                           33

#define SSL_CTRL_GET_READ_AHEAD                 40
#define SSL_CTRL_SET_READ_AHEAD                 41
#define SSL_CTRL_SET_SESS_CACHE_SIZE            42
#define SSL_CTRL_GET_SESS_CACHE_SIZE            43
#define SSL_CTRL_SET_SESS_CACHE_MODE            44
#define SSL_CTRL_GET_SESS_CACHE_MODE            45

#define SSL_CTRL_GET_MAX_CERT_LIST              50
#define SSL_CTRL_SET_MAX_CERT_LIST              51

#define SSL_CTRL_SET_MAX_SEND_FRAGMENT          52

/* see tls1.h for macros based on these */
#define SSL_CTRL_SET_TLSEXT_SERVERNAME_CB       53
#define SSL_CTRL_SET_TLSEXT_SERVERNAME_ARG      54
#define SSL_CTRL_SET_TLSEXT_HOSTNAME            55
#define SSL_CTRL_SET_TLSEXT_DEBUG_CB            56
#define SSL_CTRL_SET_TLSEXT_DEBUG_ARG           57
#define SSL_CTRL_GET_TLSEXT_TICKET_KEYS         58
#define SSL_CTRL_SET_TLSEXT_TICKET_KEYS         59
#define SSL_CTRL_GET_TLSEXT_STATUS_REQ_CB       128
#define SSL_CTRL_SET_TLSEXT_STATUS_REQ_CB       63
#define SSL_CTRL_GET_TLSEXT_STATUS_REQ_CB_ARG   129
#define SSL_CTRL_SET_TLSEXT_STATUS_REQ_CB_ARG   64
#define SSL_CTRL_GET_TLSEXT_STATUS_REQ_TYPE     127
#define SSL_CTRL_SET_TLSEXT_STATUS_REQ_TYPE     65
#define SSL_CTRL_GET_TLSEXT_STATUS_REQ_EXTS     66
#define SSL_CTRL_SET_TLSEXT_STATUS_REQ_EXTS     67
#define SSL_CTRL_GET_TLSEXT_STATUS_REQ_IDS      68
#define SSL_CTRL_SET_TLSEXT_STATUS_REQ_IDS      69
#define SSL_CTRL_GET_TLSEXT_STATUS_REQ_OCSP_RESP        70
#define SSL_CTRL_SET_TLSEXT_STATUS_REQ_OCSP_RESP        71

#define SSL_CTRL_SET_TLSEXT_TICKET_KEY_CB       72

#define SSL_CTRL_SET_TLS_EXT_SRP_USERNAME_CB    75
#define SSL_CTRL_SET_SRP_VERIFY_PARAM_CB                76
#define SSL_CTRL_SET_SRP_GIVE_CLIENT_PWD_CB             77

#define SSL_CTRL_SET_SRP_ARG            78
#define SSL_CTRL_SET_TLS_EXT_SRP_USERNAME               79
#define SSL_CTRL_SET_TLS_EXT_SRP_STRENGTH               80
#define SSL_CTRL_SET_TLS_EXT_SRP_PASSWORD               81

#define DTLS_CTRL_GET_TIMEOUT           73
#define DTLS_CTRL_HANDLE_TIMEOUT        74
#define DTLS_CTRL_LISTEN                        75

#define SSL_CTRL_GET_RI_SUPPORT                 76
#define SSL_CTRL_CLEAR_OPTIONS                  77
#define SSL_CTRL_CLEAR_MODE                     78

#define SSL_CTRL_GET_EXTRA_CHAIN_CERTS          82
#define SSL_CTRL_CLEAR_EXTRA_CHAIN_CERTS        83

#define SSL_CTRL_CHAIN                                  88
#define SSL_CTRL_CHAIN_CERT                             89

#define SSL_CTRL_SET_GROUPS                             91
#define SSL_CTRL_SET_GROUPS_LIST                        92
#define SSL_CTRL_GET_SHARED_GROUP                       93
#define SSL_CTRL_SET_ECDH_AUTO                          94

#if defined(LIBRESSL_HAS_TLS1_3) || defined(LIBRESSL_INTERNAL)
#define SSL_CTRL_GET_PEER_SIGNATURE_NID                 108
#define SSL_CTRL_GET_PEER_TMP_KEY                       109
#define SSL_CTRL_GET_SERVER_TMP_KEY SSL_CTRL_GET_PEER_TMP_KEY
#else
#define SSL_CTRL_GET_SERVER_TMP_KEY             109
#endif

#define SSL_CTRL_GET_CHAIN_CERTS                        115

#define SSL_CTRL_SET_DH_AUTO                    118

#define SSL_CTRL_SET_MIN_PROTO_VERSION                  123
#define SSL_CTRL_SET_MAX_PROTO_VERSION                  124
#define SSL_CTRL_GET_MIN_PROTO_VERSION                  130
#define SSL_CTRL_GET_MAX_PROTO_VERSION                  131

#if defined(LIBRESSL_HAS_TLS1_3) || defined(LIBRESSL_INTERNAL)
#define SSL_CTRL_GET_SIGNATURE_NID                      132
#endif

#define DTLSv1_get_timeout(ssl, arg) \
        SSL_ctrl(ssl,DTLS_CTRL_GET_TIMEOUT,0, (void *)arg)
#define DTLSv1_handle_timeout(ssl) \
        SSL_ctrl(ssl,DTLS_CTRL_HANDLE_TIMEOUT,0, NULL)
#define DTLSv1_listen(ssl, peer) \
        SSL_ctrl(ssl,DTLS_CTRL_LISTEN,0, (void *)peer)

#define SSL_session_reused(ssl) \
        SSL_ctrl((ssl),SSL_CTRL_GET_SESSION_REUSED,0,NULL)
#define SSL_num_renegotiations(ssl) \
        SSL_ctrl((ssl),SSL_CTRL_GET_NUM_RENEGOTIATIONS,0,NULL)
#define SSL_clear_num_renegotiations(ssl) \
        SSL_ctrl((ssl),SSL_CTRL_CLEAR_NUM_RENEGOTIATIONS,0,NULL)
#define SSL_total_renegotiations(ssl) \
        SSL_ctrl((ssl),SSL_CTRL_GET_TOTAL_RENEGOTIATIONS,0,NULL)

#define SSL_CTX_need_tmp_RSA(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_NEED_TMP_RSA,0,NULL)
#define SSL_CTX_set_tmp_rsa(ctx,rsa) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_RSA,0,(char *)rsa)
#define SSL_CTX_set_tmp_dh(ctx,dh) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_DH,0,(char *)dh)
#define SSL_CTX_set_tmp_ecdh(ctx,ecdh) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_TMP_ECDH,0,(char *)ecdh)
#define SSL_CTX_set_dh_auto(ctx, onoff) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_DH_AUTO,onoff,NULL)
#define SSL_CTX_set_ecdh_auto(ctx, onoff) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_ECDH_AUTO,onoff,NULL)

#define SSL_need_tmp_RSA(ssl) \
        SSL_ctrl(ssl,SSL_CTRL_NEED_TMP_RSA,0,NULL)
#define SSL_set_tmp_rsa(ssl,rsa) \
        SSL_ctrl(ssl,SSL_CTRL_SET_TMP_RSA,0,(char *)rsa)
#define SSL_set_tmp_dh(ssl,dh) \
        SSL_ctrl(ssl,SSL_CTRL_SET_TMP_DH,0,(char *)dh)
#define SSL_set_tmp_ecdh(ssl,ecdh) \
        SSL_ctrl(ssl,SSL_CTRL_SET_TMP_ECDH,0,(char *)ecdh)
#define SSL_set_dh_auto(s, onoff) \
        SSL_ctrl(s,SSL_CTRL_SET_DH_AUTO,onoff,NULL)
#define SSL_set_ecdh_auto(s, onoff) \
        SSL_ctrl(s,SSL_CTRL_SET_ECDH_AUTO,onoff,NULL)

int SSL_CTX_set0_chain(SSL_CTX *ctx, STACK_OF(X509) *chain);
int SSL_CTX_set1_chain(SSL_CTX *ctx, STACK_OF(X509) *chain);
int SSL_CTX_add0_chain_cert(SSL_CTX *ctx, X509 *x509);
int SSL_CTX_add1_chain_cert(SSL_CTX *ctx, X509 *x509);
int SSL_CTX_get0_chain_certs(const SSL_CTX *ctx, STACK_OF(X509) **out_chain);
int SSL_CTX_clear_chain_certs(SSL_CTX *ctx);

int SSL_set0_chain(SSL *ssl, STACK_OF(X509) *chain);
int SSL_set1_chain(SSL *ssl, STACK_OF(X509) *chain);
int SSL_add0_chain_cert(SSL *ssl, X509 *x509);
int SSL_add1_chain_cert(SSL *ssl, X509 *x509);
int SSL_get0_chain_certs(const SSL *ssl, STACK_OF(X509) **out_chain);
int SSL_clear_chain_certs(SSL *ssl);

int SSL_CTX_set1_groups(SSL_CTX *ctx, const int *groups, size_t groups_len);
int SSL_CTX_set1_groups_list(SSL_CTX *ctx, const char *groups);

int SSL_set1_groups(SSL *ssl, const int *groups, size_t groups_len);
int SSL_set1_groups_list(SSL *ssl, const char *groups);

int SSL_CTX_get_min_proto_version(SSL_CTX *ctx);
int SSL_CTX_get_max_proto_version(SSL_CTX *ctx);
int SSL_CTX_set_min_proto_version(SSL_CTX *ctx, uint16_t version);
int SSL_CTX_set_max_proto_version(SSL_CTX *ctx, uint16_t version);

int SSL_get_min_proto_version(SSL *ssl);
int SSL_get_max_proto_version(SSL *ssl);
int SSL_set_min_proto_version(SSL *ssl, uint16_t version);
int SSL_set_max_proto_version(SSL *ssl, uint16_t version);

const SSL_METHOD *SSL_CTX_get_ssl_method(const SSL_CTX *ctx);

#ifndef LIBRESSL_INTERNAL
#define SSL_CTRL_SET_CURVES                     SSL_CTRL_SET_GROUPS
#define SSL_CTRL_SET_CURVES_LIST                SSL_CTRL_SET_GROUPS_LIST

#define SSL_CTX_set1_curves SSL_CTX_set1_groups
#define SSL_CTX_set1_curves_list SSL_CTX_set1_groups_list
#define SSL_set1_curves SSL_set1_groups
#define SSL_set1_curves_list SSL_set1_groups_list
#endif

#define SSL_CTX_add_extra_chain_cert(ctx, x509) \
        SSL_CTX_ctrl(ctx, SSL_CTRL_EXTRA_CHAIN_CERT, 0, (char *)x509)
#define SSL_CTX_get_extra_chain_certs(ctx, px509) \
        SSL_CTX_ctrl(ctx, SSL_CTRL_GET_EXTRA_CHAIN_CERTS, 0, px509)
#define SSL_CTX_get_extra_chain_certs_only(ctx, px509) \
        SSL_CTX_ctrl(ctx, SSL_CTRL_GET_EXTRA_CHAIN_CERTS, 1, px509)
#define SSL_CTX_clear_extra_chain_certs(ctx) \
        SSL_CTX_ctrl(ctx, SSL_CTRL_CLEAR_EXTRA_CHAIN_CERTS, 0, NULL)

#define SSL_get_shared_group(s, n) \
        SSL_ctrl((s), SSL_CTRL_GET_SHARED_GROUP, (n), NULL)
#define SSL_get_shared_curve SSL_get_shared_group

#define SSL_get_server_tmp_key(s, pk) \
        SSL_ctrl(s,SSL_CTRL_GET_SERVER_TMP_KEY,0,pk)

#if defined(LIBRESSL_HAS_TLS1_3) || defined(LIBRESSL_INTERNAL)
#define SSL_get_signature_nid(s, pn) \
        SSL_ctrl(s, SSL_CTRL_GET_SIGNATURE_NID, 0, pn)

#define SSL_get_peer_signature_nid(s, pn) \
        SSL_ctrl(s, SSL_CTRL_GET_PEER_SIGNATURE_NID, 0, pn)
#define SSL_get_peer_tmp_key(s, pk) \
        SSL_ctrl(s, SSL_CTRL_GET_PEER_TMP_KEY, 0, pk)
#endif /* LIBRESSL_HAS_TLS1_3 || LIBRESSL_INTERNAL */

#ifndef LIBRESSL_INTERNAL
/*
 * Also provide those functions as macros for compatibility with
 * existing users.
 */
#define SSL_CTX_set0_chain              SSL_CTX_set0_chain
#define SSL_CTX_set1_chain              SSL_CTX_set1_chain
#define SSL_CTX_add0_chain_cert         SSL_CTX_add0_chain_cert
#define SSL_CTX_add1_chain_cert         SSL_CTX_add1_chain_cert
#define SSL_CTX_get0_chain_certs        SSL_CTX_get0_chain_certs
#define SSL_CTX_clear_chain_certs       SSL_CTX_clear_chain_certs

#define SSL_add0_chain_cert             SSL_add0_chain_cert
#define SSL_add1_chain_cert             SSL_add1_chain_cert
#define SSL_set0_chain                  SSL_set0_chain
#define SSL_set1_chain                  SSL_set1_chain
#define SSL_get0_chain_certs            SSL_get0_chain_certs
#define SSL_clear_chain_certs           SSL_clear_chain_certs

#define SSL_CTX_set1_groups             SSL_CTX_set1_groups
#define SSL_CTX_set1_groups_list        SSL_CTX_set1_groups_list
#define SSL_set1_groups                 SSL_set1_groups
#define SSL_set1_groups_list            SSL_set1_groups_list

#define SSL_CTX_get_min_proto_version   SSL_CTX_get_min_proto_version
#define SSL_CTX_get_max_proto_version   SSL_CTX_get_max_proto_version
#define SSL_CTX_set_min_proto_version   SSL_CTX_set_min_proto_version
#define SSL_CTX_set_max_proto_version   SSL_CTX_set_max_proto_version

#define SSL_get_min_proto_version       SSL_get_min_proto_version
#define SSL_get_max_proto_version       SSL_get_max_proto_version
#define SSL_set_min_proto_version       SSL_set_min_proto_version
#define SSL_set_max_proto_version       SSL_set_max_proto_version
#endif

const BIO_METHOD *BIO_f_ssl(void);
BIO *BIO_new_ssl(SSL_CTX *ctx, int client);
BIO *BIO_new_ssl_connect(SSL_CTX *ctx);
BIO *BIO_new_buffer_ssl_connect(SSL_CTX *ctx);
int BIO_ssl_copy_session_id(BIO *to, BIO *from);
void BIO_ssl_shutdown(BIO *ssl_bio);

STACK_OF(SSL_CIPHER) *SSL_CTX_get_ciphers(const SSL_CTX *ctx);
int     SSL_CTX_set_cipher_list(SSL_CTX *, const char *str);
#if defined(LIBRESSL_HAS_TLS1_3) || defined(LIBRESSL_INTERNAL)
int SSL_CTX_set_ciphersuites(SSL_CTX *ctx, const char *str);
#endif
SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth);
void    SSL_CTX_free(SSL_CTX *);
int SSL_CTX_up_ref(SSL_CTX *ctx);
long SSL_CTX_set_timeout(SSL_CTX *ctx, long t);
long SSL_CTX_get_timeout(const SSL_CTX *ctx);
X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *);
void SSL_CTX_set_cert_store(SSL_CTX *, X509_STORE *);
void SSL_CTX_set1_cert_store(SSL_CTX *ctx, X509_STORE *store);
X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx);
EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx);
int SSL_want(const SSL *s);
int     SSL_clear(SSL *s);

void    SSL_CTX_flush_sessions(SSL_CTX *ctx, long tm);

const SSL_CIPHER *SSL_get_current_cipher(const SSL *s);
int     SSL_CIPHER_get_bits(const SSL_CIPHER *c, int *alg_bits);
const char *    SSL_CIPHER_get_version(const SSL_CIPHER *c);
const char *    SSL_CIPHER_get_name(const SSL_CIPHER *c);
unsigned long   SSL_CIPHER_get_id(const SSL_CIPHER *c);
uint16_t SSL_CIPHER_get_value(const SSL_CIPHER *c);
const SSL_CIPHER *SSL_CIPHER_find(SSL *ssl, const unsigned char *ptr);
int SSL_CIPHER_get_cipher_nid(const SSL_CIPHER *c);
int SSL_CIPHER_get_digest_nid(const SSL_CIPHER *c);
int SSL_CIPHER_get_kx_nid(const SSL_CIPHER *c);
int SSL_CIPHER_get_auth_nid(const SSL_CIPHER *c);
const EVP_MD *SSL_CIPHER_get_handshake_digest(const SSL_CIPHER *c);
int SSL_CIPHER_is_aead(const SSL_CIPHER *c);

int     SSL_get_fd(const SSL *s);
int     SSL_get_rfd(const SSL *s);
int     SSL_get_wfd(const SSL *s);
const char  * SSL_get_cipher_list(const SSL *s, int n);
char *  SSL_get_shared_ciphers(const SSL *s, char *buf, int len);
int     SSL_get_read_ahead(const SSL * s);
int     SSL_pending(const SSL *s);
int     SSL_set_fd(SSL *s, int fd);
int     SSL_set_rfd(SSL *s, int fd);
int     SSL_set_wfd(SSL *s, int fd);
void    SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio);
BIO *   SSL_get_rbio(const SSL *s);
void    SSL_set0_rbio(SSL *s, BIO *rbio);
BIO *   SSL_get_wbio(const SSL *s);
int     SSL_set_cipher_list(SSL *s, const char *str);
#if defined(LIBRESSL_HAS_TLS1_3) || defined(LIBRESSL_INTERNAL)
int     SSL_set_ciphersuites(SSL *s, const char *str);
#endif
void    SSL_set_read_ahead(SSL *s, int yes);
int     SSL_get_verify_mode(const SSL *s);
int     SSL_get_verify_depth(const SSL *s);
int     (*SSL_get_verify_callback(const SSL *s))(int, X509_STORE_CTX *);
void    SSL_set_verify(SSL *s, int mode,
            int (*callback)(int ok, X509_STORE_CTX *ctx));
void    SSL_set_verify_depth(SSL *s, int depth);
int     SSL_use_RSAPrivateKey(SSL *ssl, RSA *rsa);
int     SSL_use_RSAPrivateKey_ASN1(SSL *ssl, const unsigned char *d, long len);
int     SSL_use_PrivateKey(SSL *ssl, EVP_PKEY *pkey);
int     SSL_use_PrivateKey_ASN1(int pk, SSL *ssl, const unsigned char *d, long len);
int     SSL_use_certificate(SSL *ssl, X509 *x);
int     SSL_use_certificate_ASN1(SSL *ssl, const unsigned char *d, int len);

int     SSL_use_RSAPrivateKey_file(SSL *ssl, const char *file, int type);
int     SSL_use_PrivateKey_file(SSL *ssl, const char *file, int type);
int     SSL_use_certificate_file(SSL *ssl, const char *file, int type);
int     SSL_use_certificate_chain_file(SSL *ssl, const char *file);
int     SSL_CTX_use_RSAPrivateKey_file(SSL_CTX *ctx, const char *file, int type);
int     SSL_CTX_use_PrivateKey_file(SSL_CTX *ctx, const char *file, int type);
int     SSL_CTX_use_certificate_file(SSL_CTX *ctx, const char *file, int type);
int     SSL_CTX_use_certificate_chain_file(SSL_CTX *ctx, const char *file); /* PEM type */
int     SSL_CTX_use_certificate_chain_mem(SSL_CTX *ctx, void *buf, int len);
STACK_OF(X509_NAME) *SSL_load_client_CA_file(const char *file);
int     SSL_add_file_cert_subjects_to_stack(STACK_OF(X509_NAME) *stackCAs,
            const char *file);
int     SSL_add_dir_cert_subjects_to_stack(STACK_OF(X509_NAME) *stackCAs,
            const char *dir);

void    SSL_load_error_strings(void );
const char *SSL_state_string(const SSL *s);
const char *SSL_rstate_string(const SSL *s);
const char *SSL_state_string_long(const SSL *s);
const char *SSL_rstate_string_long(const SSL *s);
const SSL_CIPHER *SSL_SESSION_get0_cipher(const SSL_SESSION *ss);
size_t  SSL_SESSION_get_master_key(const SSL_SESSION *ss,
            unsigned char *out, size_t max_out);
int     SSL_SESSION_get_protocol_version(const SSL_SESSION *s);
long    SSL_SESSION_get_time(const SSL_SESSION *s);
long    SSL_SESSION_set_time(SSL_SESSION *s, long t);
long    SSL_SESSION_get_timeout(const SSL_SESSION *s);
long    SSL_SESSION_set_timeout(SSL_SESSION *s, long t);
int     SSL_copy_session_id(SSL *to, const SSL *from);
X509    *SSL_SESSION_get0_peer(SSL_SESSION *s);
int     SSL_SESSION_set1_id(SSL_SESSION *s, const unsigned char *sid,
            unsigned int sid_len);
int     SSL_SESSION_set1_id_context(SSL_SESSION *s,
            const unsigned char *sid_ctx, unsigned int sid_ctx_len);
#if defined(LIBRESSL_HAS_TLS1_3) || defined(LIBRESSL_INTERNAL)
int SSL_SESSION_is_resumable(const SSL_SESSION *s);
#endif

SSL_SESSION *SSL_SESSION_new(void);
void    SSL_SESSION_free(SSL_SESSION *ses);
SSL_SESSION *SSL_SESSION_dup(const SSL_SESSION *src);
int     SSL_SESSION_up_ref(SSL_SESSION *ss);
const unsigned char *SSL_SESSION_get_id(const SSL_SESSION *ss,
            unsigned int *len);
const unsigned char *SSL_SESSION_get0_id_context(const SSL_SESSION *ss,
            unsigned int *len);
#if defined(LIBRESSL_HAS_TLS1_3) || defined(LIBRESSL_INTERNAL)
uint32_t SSL_SESSION_get_max_early_data(const SSL_SESSION *sess);
int SSL_SESSION_set_max_early_data(SSL_SESSION *sess, uint32_t max_early_data);
#endif
unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION *s);
int     SSL_SESSION_has_ticket(const SSL_SESSION *s);
unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION *ss);
int     SSL_SESSION_print_fp(FILE *fp, const SSL_SESSION *ses);
int     SSL_SESSION_print(BIO *fp, const SSL_SESSION *ses);
int     i2d_SSL_SESSION(SSL_SESSION *in, unsigned char **pp);
int     SSL_set_session(SSL *to, SSL_SESSION *session);
int     SSL_CTX_add_session(SSL_CTX *s, SSL_SESSION *c);
int     SSL_CTX_remove_session(SSL_CTX *, SSL_SESSION *c);
int     SSL_CTX_set_generate_session_id(SSL_CTX *, GEN_SESSION_CB);
int     SSL_set_generate_session_id(SSL *, GEN_SESSION_CB);
int     SSL_has_matching_session_id(const SSL *ssl, const unsigned char *id,
            unsigned int id_len);
SSL_SESSION *d2i_SSL_SESSION(SSL_SESSION **a, const unsigned char **pp,
            long length);

#ifdef HEADER_X509_H
X509 *  SSL_get_peer_certificate(const SSL *s);
#endif

STACK_OF(X509) *SSL_get_peer_cert_chain(const SSL *s);

int SSL_CTX_get_verify_mode(const SSL_CTX *ctx);
int SSL_CTX_get_verify_depth(const SSL_CTX *ctx);
int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int, X509_STORE_CTX *);
void SSL_CTX_set_verify(SSL_CTX *ctx, int mode,
    int (*callback)(int, X509_STORE_CTX *));
void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth);
void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *, void *), void *arg);
int SSL_CTX_use_RSAPrivateKey(SSL_CTX *ctx, RSA *rsa);
int SSL_CTX_use_RSAPrivateKey_ASN1(SSL_CTX *ctx, const unsigned char *d, long len);
int SSL_CTX_use_PrivateKey(SSL_CTX *ctx, EVP_PKEY *pkey);
int SSL_CTX_use_PrivateKey_ASN1(int pk, SSL_CTX *ctx, const unsigned char *d, long len);
int SSL_CTX_use_certificate(SSL_CTX *ctx, X509 *x);
int SSL_CTX_use_certificate_ASN1(SSL_CTX *ctx, int len, const unsigned char *d);

pem_password_cb *SSL_CTX_get_default_passwd_cb(SSL_CTX *ctx);
void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb);
void *SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX *ctx);
void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u);

int SSL_CTX_check_private_key(const SSL_CTX *ctx);
int SSL_check_private_key(const SSL *ctx);

int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx, unsigned int sid_ctx_len);

int SSL_set_session_id_context(SSL *ssl, const unsigned char *sid_ctx, unsigned int sid_ctx_len);

int SSL_CTX_set_purpose(SSL_CTX *s, int purpose);
int SSL_set_purpose(SSL *s, int purpose);
int SSL_CTX_set_trust(SSL_CTX *s, int trust);
int SSL_set_trust(SSL *s, int trust);
int SSL_set1_host(SSL *s, const char *hostname);
void SSL_set_hostflags(SSL *s, unsigned int flags);
const char *SSL_get0_peername(SSL *s);

X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx);
int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm);
X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl);
int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm);

SSL *SSL_new(SSL_CTX *ctx);
void    SSL_free(SSL *ssl);
int     SSL_up_ref(SSL *ssl);
int     SSL_accept(SSL *ssl);
int     SSL_connect(SSL *ssl);
int     SSL_is_dtls(const SSL *s);
int     SSL_is_server(const SSL *s);
int     SSL_read(SSL *ssl, void *buf, int num);
int     SSL_peek(SSL *ssl, void *buf, int num);
int     SSL_write(SSL *ssl, const void *buf, int num);
int     SSL_read_ex(SSL *ssl, void *buf, size_t num, size_t *bytes_read);
int     SSL_peek_ex(SSL *ssl, void *buf, size_t num, size_t *bytes_peeked);
int     SSL_write_ex(SSL *ssl, const void *buf, size_t num, size_t *bytes_written);

#if defined(LIBRESSL_HAS_TLS1_3) || defined(LIBRESSL_INTERNAL)
uint32_t SSL_CTX_get_max_early_data(const SSL_CTX *ctx);
int SSL_CTX_set_max_early_data(SSL_CTX *ctx, uint32_t max_early_data);

uint32_t SSL_get_max_early_data(const SSL *s);
int SSL_set_max_early_data(SSL *s, uint32_t max_early_data);

#define SSL_EARLY_DATA_NOT_SENT         0
#define SSL_EARLY_DATA_REJECTED         1
#define SSL_EARLY_DATA_ACCEPTED         2
int SSL_get_early_data_status(const SSL *s);

#define SSL_READ_EARLY_DATA_ERROR       0
#define SSL_READ_EARLY_DATA_SUCCESS     1
#define SSL_READ_EARLY_DATA_FINISH      2
int SSL_read_early_data(SSL *s, void *buf, size_t num, size_t *readbytes);
int SSL_write_early_data(SSL *s, const void *buf, size_t num, size_t *written);
#endif

long    SSL_ctrl(SSL *ssl, int cmd, long larg, void *parg);
long    SSL_callback_ctrl(SSL *, int, void (*)(void));
long    SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg);
long    SSL_CTX_callback_ctrl(SSL_CTX *, int, void (*)(void));

int     SSL_get_error(const SSL *s, int ret_code);
const char *SSL_get_version(const SSL *s);

/* This sets the 'default' SSL version that SSL_new() will create */
int SSL_CTX_set_ssl_version(SSL_CTX *ctx, const SSL_METHOD *meth);

const SSL_METHOD *SSLv23_method(void);          /* SSLv3 or TLSv1.* */
const SSL_METHOD *SSLv23_server_method(void);   /* SSLv3 or TLSv1.* */
const SSL_METHOD *SSLv23_client_method(void);   /* SSLv3 or TLSv1.* */

const SSL_METHOD *TLSv1_method(void);           /* TLSv1.0 */
const SSL_METHOD *TLSv1_server_method(void);    /* TLSv1.0 */
const SSL_METHOD *TLSv1_client_method(void);    /* TLSv1.0 */

const SSL_METHOD *TLSv1_1_method(void);         /* TLSv1.1 */
const SSL_METHOD *TLSv1_1_server_method(void);  /* TLSv1.1 */
const SSL_METHOD *TLSv1_1_client_method(void);  /* TLSv1.1 */

const SSL_METHOD *TLSv1_2_method(void);         /* TLSv1.2 */
const SSL_METHOD *TLSv1_2_server_method(void);  /* TLSv1.2 */
const SSL_METHOD *TLSv1_2_client_method(void);  /* TLSv1.2 */

const SSL_METHOD *TLS_method(void);             /* TLS v1.0 or later */
const SSL_METHOD *TLS_server_method(void);      /* TLS v1.0 or later */
const SSL_METHOD *TLS_client_method(void);      /* TLS v1.0 or later */

const SSL_METHOD *DTLSv1_method(void);          /* DTLSv1.0 */
const SSL_METHOD *DTLSv1_server_method(void);   /* DTLSv1.0 */
const SSL_METHOD *DTLSv1_client_method(void);   /* DTLSv1.0 */

const SSL_METHOD *DTLSv1_2_method(void);        /* DTLSv1.2 */
const SSL_METHOD *DTLSv1_2_server_method(void); /* DTLSv1.2 */
const SSL_METHOD *DTLSv1_2_client_method(void); /* DTLSv1.2 */

const SSL_METHOD *DTLS_method(void);            /* DTLS v1.0 or later */
const SSL_METHOD *DTLS_server_method(void);     /* DTLS v1.0 or later */
const SSL_METHOD *DTLS_client_method(void);     /* DTLS v1.0 or later */

STACK_OF(SSL_CIPHER) *SSL_get_ciphers(const SSL *s);
STACK_OF(SSL_CIPHER) *SSL_get_client_ciphers(const SSL *s);
STACK_OF(SSL_CIPHER) *SSL_get1_supported_ciphers(SSL *s);

int SSL_do_handshake(SSL *s);
int SSL_renegotiate(SSL *s);
int SSL_renegotiate_abbreviated(SSL *s);
int SSL_renegotiate_pending(SSL *s);
int SSL_shutdown(SSL *s);

const SSL_METHOD *SSL_get_ssl_method(SSL *s);
int SSL_set_ssl_method(SSL *s, const SSL_METHOD *method);
const char *SSL_alert_type_string_long(int value);
const char *SSL_alert_type_string(int value);
const char *SSL_alert_desc_string_long(int value);
const char *SSL_alert_desc_string(int value);

void SSL_set_client_CA_list(SSL *s, STACK_OF(X509_NAME) *name_list);
void SSL_CTX_set_client_CA_list(SSL_CTX *ctx, STACK_OF(X509_NAME) *name_list);
STACK_OF(X509_NAME) *SSL_get_client_CA_list(const SSL *s);
STACK_OF(X509_NAME) *SSL_CTX_get_client_CA_list(const SSL_CTX *s);
int SSL_add_client_CA(SSL *ssl, X509 *x);
int SSL_CTX_add_client_CA(SSL_CTX *ctx, X509 *x);

void SSL_set_connect_state(SSL *s);
void SSL_set_accept_state(SSL *s);

long SSL_get_default_timeout(const SSL *s);

char *SSL_CIPHER_description(const SSL_CIPHER *, char *buf, int size);
STACK_OF(X509_NAME) *SSL_dup_CA_list(const STACK_OF(X509_NAME) *sk);

SSL *SSL_dup(SSL *ssl);

X509 *SSL_get_certificate(const SSL *ssl);
/* EVP_PKEY */ struct evp_pkey_st *SSL_get_privatekey(const SSL *ssl);

void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx,int mode);
int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx);
void SSL_set_quiet_shutdown(SSL *ssl,int mode);
int SSL_get_quiet_shutdown(const SSL *ssl);
void SSL_set_shutdown(SSL *ssl,int mode);
int SSL_get_shutdown(const SSL *ssl);
int SSL_version(const SSL *ssl);
int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx);
int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
    const char *CApath);
int SSL_CTX_load_verify_mem(SSL_CTX *ctx, void *buf, int len);
#define SSL_get0_session SSL_get_session /* just peek at pointer */
SSL_SESSION *SSL_get_session(const SSL *ssl);
SSL_SESSION *SSL_get1_session(SSL *ssl); /* obtain a reference count */
SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl);
SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX* ctx);
void SSL_set_info_callback(SSL *ssl,
    void (*cb)(const SSL *ssl, int type, int val));
void (*SSL_get_info_callback(const SSL *ssl))(const SSL *ssl, int type, int val);
int SSL_state(const SSL *ssl);
void SSL_set_state(SSL *ssl, int state);

void SSL_set_verify_result(SSL *ssl, long v);
long SSL_get_verify_result(const SSL *ssl);

int SSL_set_ex_data(SSL *ssl, int idx, void *data);
void *SSL_get_ex_data(const SSL *ssl, int idx);
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);

int SSL_SESSION_set_ex_data(SSL_SESSION *ss, int idx, void *data);
void *SSL_SESSION_get_ex_data(const SSL_SESSION *ss, int idx);
int SSL_SESSION_get_ex_new_index(long argl, void *argp,
    CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func,
    CRYPTO_EX_free *free_func);

int SSL_CTX_set_ex_data(SSL_CTX *ssl, int idx, void *data);
void *SSL_CTX_get_ex_data(const SSL_CTX *ssl, int idx);
int SSL_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
    CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func);

int SSL_get_ex_data_X509_STORE_CTX_idx(void );

#define SSL_CTX_sess_set_cache_size(ctx,t) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_SESS_CACHE_SIZE,t,NULL)
#define SSL_CTX_sess_get_cache_size(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_GET_SESS_CACHE_SIZE,0,NULL)
#define SSL_CTX_set_session_cache_mode(ctx,m) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_SESS_CACHE_MODE,m,NULL)
#define SSL_CTX_get_session_cache_mode(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_GET_SESS_CACHE_MODE,0,NULL)

#define SSL_CTX_get_default_read_ahead(ctx) SSL_CTX_get_read_ahead(ctx)
#define SSL_CTX_set_default_read_ahead(ctx,m) SSL_CTX_set_read_ahead(ctx,m)
#define SSL_CTX_get_read_ahead(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_GET_READ_AHEAD,0,NULL)
#define SSL_CTX_set_read_ahead(ctx,m) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_READ_AHEAD,m,NULL)
#define SSL_CTX_get_max_cert_list(ctx) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_GET_MAX_CERT_LIST,0,NULL)
#define SSL_CTX_set_max_cert_list(ctx,m) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_MAX_CERT_LIST,m,NULL)
#define SSL_get_max_cert_list(ssl) \
        SSL_ctrl(ssl,SSL_CTRL_GET_MAX_CERT_LIST,0,NULL)
#define SSL_set_max_cert_list(ssl,m) \
        SSL_ctrl(ssl,SSL_CTRL_SET_MAX_CERT_LIST,m,NULL)

#define SSL_CTX_set_max_send_fragment(ctx,m) \
        SSL_CTX_ctrl(ctx,SSL_CTRL_SET_MAX_SEND_FRAGMENT,m,NULL)
#define SSL_set_max_send_fragment(ssl,m) \
        SSL_ctrl(ssl,SSL_CTRL_SET_MAX_SEND_FRAGMENT,m,NULL)

/* NB: the keylength is only applicable when is_export is true */
void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx,
    RSA *(*cb)(SSL *ssl, int is_export, int keylength));

void SSL_set_tmp_rsa_callback(SSL *ssl,
    RSA *(*cb)(SSL *ssl, int is_export, int keylength));
void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx,
    DH *(*dh)(SSL *ssl, int is_export, int keylength));
void SSL_set_tmp_dh_callback(SSL *ssl,
    DH *(*dh)(SSL *ssl, int is_export, int keylength));
void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx,
    EC_KEY *(*ecdh)(SSL *ssl, int is_export, int keylength));
void SSL_set_tmp_ecdh_callback(SSL *ssl,
    EC_KEY *(*ecdh)(SSL *ssl, int is_export, int keylength));

size_t SSL_get_client_random(const SSL *s, unsigned char *out, size_t max_out);
size_t SSL_get_server_random(const SSL *s, unsigned char *out, size_t max_out);

const void *SSL_get_current_compression(SSL *s);
const void *SSL_get_current_expansion(SSL *s);

const char *SSL_COMP_get_name(const void *comp);
void *SSL_COMP_get_compression_methods(void);

/* TLS extensions functions */
int SSL_set_session_ticket_ext(SSL *s, void *ext_data, int ext_len);

int SSL_set_session_ticket_ext_cb(SSL *s,
    tls_session_ticket_ext_cb_fn cb, void *arg);

/* Pre-shared secret session resumption functions */
int SSL_set_session_secret_cb(SSL *s,
    tls_session_secret_cb_fn tls_session_secret_cb, void *arg);

int SSL_cache_hit(SSL *s);

/* What the "other" parameter contains in security callback */
/* Mask for type */
#define SSL_SECOP_OTHER_TYPE            0xffff0000
#define SSL_SECOP_OTHER_NONE            0
#define SSL_SECOP_OTHER_CIPHER          (1 << 16)
#define SSL_SECOP_OTHER_CURVE           (2 << 16)
#define SSL_SECOP_OTHER_DH              (3 << 16)
#define SSL_SECOP_OTHER_PKEY            (4 << 16)
#define SSL_SECOP_OTHER_SIGALG          (5 << 16)
#define SSL_SECOP_OTHER_CERT            (6 << 16)

/* Indicated operation refers to peer key or certificate */
#define SSL_SECOP_PEER                  0x1000

/* Values for "op" parameter in security callback */

/* Called to filter ciphers */
/* Ciphers client supports */
#define SSL_SECOP_CIPHER_SUPPORTED      (1 | SSL_SECOP_OTHER_CIPHER)
/* Cipher shared by client/server */
#define SSL_SECOP_CIPHER_SHARED         (2 | SSL_SECOP_OTHER_CIPHER)
/* Sanity check of cipher server selects */
#define SSL_SECOP_CIPHER_CHECK          (3 | SSL_SECOP_OTHER_CIPHER)
/* Curves supported by client */
#define SSL_SECOP_CURVE_SUPPORTED       (4 | SSL_SECOP_OTHER_CURVE)
/* Curves shared by client/server */
#define SSL_SECOP_CURVE_SHARED          (5 | SSL_SECOP_OTHER_CURVE)
/* Sanity check of curve server selects */
#define SSL_SECOP_CURVE_CHECK           (6 | SSL_SECOP_OTHER_CURVE)
/* Temporary DH key */
/*
 * XXX: changed in OpenSSL e2b420fdd70 to (7 | SSL_SECOP_OTHER_PKEY)
 * Needs switching internal use of DH to EVP_PKEY. The code is not reachable
 * from outside the library as long as we do not expose the callback in the API.
 */
#define SSL_SECOP_TMP_DH                (7 | SSL_SECOP_OTHER_DH)
/* SSL/TLS version */
#define SSL_SECOP_VERSION               (9 | SSL_SECOP_OTHER_NONE)
/* Session tickets */
#define SSL_SECOP_TICKET                (10 | SSL_SECOP_OTHER_NONE)
/* Supported signature algorithms sent to peer */
#define SSL_SECOP_SIGALG_SUPPORTED      (11 | SSL_SECOP_OTHER_SIGALG)
/* Shared signature algorithm */
#define SSL_SECOP_SIGALG_SHARED         (12 | SSL_SECOP_OTHER_SIGALG)
/* Sanity check signature algorithm allowed */
#define SSL_SECOP_SIGALG_CHECK          (13 | SSL_SECOP_OTHER_SIGALG)
/* Used to get mask of supported public key signature algorithms */
#define SSL_SECOP_SIGALG_MASK           (14 | SSL_SECOP_OTHER_SIGALG)
/* Use to see if compression is allowed */
#define SSL_SECOP_COMPRESSION           (15 | SSL_SECOP_OTHER_NONE)
/* EE key in certificate */
#define SSL_SECOP_EE_KEY                (16 | SSL_SECOP_OTHER_CERT)
/* CA key in certificate */
#define SSL_SECOP_CA_KEY                (17 | SSL_SECOP_OTHER_CERT)
/* CA digest algorithm in certificate */
#define SSL_SECOP_CA_MD                 (18 | SSL_SECOP_OTHER_CERT)
/* Peer EE key in certificate */
#define SSL_SECOP_PEER_EE_KEY           (SSL_SECOP_EE_KEY | SSL_SECOP_PEER)
/* Peer CA key in certificate */
#define SSL_SECOP_PEER_CA_KEY           (SSL_SECOP_CA_KEY | SSL_SECOP_PEER)
/* Peer CA digest algorithm in certificate */
#define SSL_SECOP_PEER_CA_MD            (SSL_SECOP_CA_MD | SSL_SECOP_PEER)

void SSL_set_security_level(SSL *ssl, int level);
int SSL_get_security_level(const SSL *ssl);

void SSL_CTX_set_security_level(SSL_CTX *ctx, int level);
int SSL_CTX_get_security_level(const SSL_CTX *ctx);

#if defined(LIBRESSL_HAS_QUIC) || defined(LIBRESSL_INTERNAL)
/*
 * QUIC integration.
 *
 * QUIC acts as an underlying transport for the TLS 1.3 handshake. The following
 * functions allow a QUIC implementation to serve as the underlying transport as
 * described in RFC 9001.
 *
 * When configured for QUIC, |SSL_do_handshake| will drive the handshake as
 * before, but it will not use the configured |BIO|. It will call functions on
 * |SSL_QUIC_METHOD| to configure secrets and send data. If data is needed from
 * the peer, it will return |SSL_ERROR_WANT_READ|. As the caller receives data
 * it can decrypt, it calls |SSL_provide_quic_data|. Subsequent
 * |SSL_do_handshake| calls will then consume that data and progress the
 * handshake. After the handshake is complete, the caller should continue to
 * call |SSL_provide_quic_data| for any post-handshake data, followed by
 * |SSL_process_quic_post_handshake| to process it. It is an error to call
 * |SSL_peek|, |SSL_read| and |SSL_write| in QUIC.
 *
 * To avoid DoS attacks, the QUIC implementation must limit the amount of data
 * being queued up. The implementation can call
 * |SSL_quic_max_handshake_flight_len| to get the maximum buffer length at each
 * encryption level.
 *
 * QUIC implementations must additionally configure transport parameters with
 * |SSL_set_quic_transport_params|. |SSL_get_peer_quic_transport_params| may be
 * used to query the value received from the peer. This extension is handled
 * as an opaque byte string, which the caller is responsible for serializing
 * and parsing. See RFC 9000 section 7.4 for further details.
 */

/*
 * ssl_encryption_level_t specifies the QUIC encryption level used to transmit
 * handshake messages.
 */
typedef enum ssl_encryption_level_t {
        ssl_encryption_initial = 0,
        ssl_encryption_early_data,
        ssl_encryption_handshake,
        ssl_encryption_application,
} OSSL_ENCRYPTION_LEVEL;

/*
 * ssl_quic_method_st (aka |SSL_QUIC_METHOD|) describes custom QUIC hooks.
 *
 * Note that we provide both the new (BoringSSL) secrets interface
 * (set_read_secret/set_write_secret) along with the old interface
 * (set_encryption_secrets), which quictls is still using.
 *
 * Since some consumers fail to use named initialisers, the order of these
 * functions is important. Hopefully all of these consumers use the old version.
 */
struct ssl_quic_method_st {
        /*
         * set_encryption_secrets configures the read and write secrets for the
         * given encryption level. This function will always be called before an
         * encryption level other than |ssl_encryption_initial| is used.
         *
         * When reading packets at a given level, the QUIC implementation must
         * send ACKs at the same level, so this function provides read and write
         * secrets together. The exception is |ssl_encryption_early_data|, where
         * secrets are only available in the client to server direction. The
         * other secret will be NULL. The server acknowledges such data at
         * |ssl_encryption_application|, which will be configured in the same
         * |SSL_do_handshake| call.
         *
         * This function should use |SSL_get_current_cipher| to determine the TLS
         * cipher suite.
         */
        int (*set_encryption_secrets)(SSL *ssl, enum ssl_encryption_level_t level,
            const uint8_t *read_secret, const uint8_t *write_secret,
            size_t secret_len);

        /*
         * add_handshake_data adds handshake data to the current flight at the
         * given encryption level. It returns one on success and zero on error.
         * Callers should defer writing data to the network until |flush_flight|
         * to better pack QUIC packets into transport datagrams.
         *
         * If |level| is not |ssl_encryption_initial|, this function will not be
         * called before |level| is initialized with |set_write_secret|.
         */
        int (*add_handshake_data)(SSL *ssl, enum ssl_encryption_level_t level,
            const uint8_t *data, size_t len);

        /*
         * flush_flight is called when the current flight is complete and should
         * be written to the transport. Note a flight may contain data at
         * several encryption levels. It returns one on success and zero on
         * error.
         */
        int (*flush_flight)(SSL *ssl);

        /*
         * send_alert sends a fatal alert at the specified encryption level. It
         * returns one on success and zero on error.
         *
         * If |level| is not |ssl_encryption_initial|, this function will not be
         * called before |level| is initialized with |set_write_secret|.
         */
        int (*send_alert)(SSL *ssl, enum ssl_encryption_level_t level,
            uint8_t alert);

        /*
         * set_read_secret configures the read secret and cipher suite for the
         * given encryption level. It returns one on success and zero to
         * terminate the handshake with an error. It will be called at most once
         * per encryption level.
         *
         * Read keys will not be released before QUIC may use them. Once a level
         * has been initialized, QUIC may begin processing data from it.
         * Handshake data should be passed to |SSL_provide_quic_data| and
         * application data (if |level| is |ssl_encryption_early_data| or
         * |ssl_encryption_application|) may be processed according to the rules
         * of the QUIC protocol.
         */
        int (*set_read_secret)(SSL *ssl, enum ssl_encryption_level_t level,
            const SSL_CIPHER *cipher, const uint8_t *secret, size_t secret_len);

        /*
         * set_write_secret behaves like |set_read_secret| but configures the
         * write secret and cipher suite for the given encryption level. It will
         * be called at most once per encryption level.
         *
         * Write keys will not be released before QUIC may use them. If |level|
         * is |ssl_encryption_early_data| or |ssl_encryption_application|, QUIC
         * may begin sending application data at |level|.
         */
        int (*set_write_secret)(SSL *ssl, enum ssl_encryption_level_t level,
            const SSL_CIPHER *cipher, const uint8_t *secret, size_t secret_len);
};

/*
 * SSL_CTX_set_quic_method configures the QUIC hooks. This should only be
 * configured with a minimum version of TLS 1.3. |quic_method| must remain valid
 * for the lifetime of |ctx|. It returns one on success and zero on error.
 */
int SSL_CTX_set_quic_method(SSL_CTX *ctx, const SSL_QUIC_METHOD *quic_method);

/*
 * SSL_set_quic_method configures the QUIC hooks. This should only be
 * configured with a minimum version of TLS 1.3. |quic_method| must remain valid
 * for the lifetime of |ssl|. It returns one on success and zero on error.
 */
int SSL_set_quic_method(SSL *ssl, const SSL_QUIC_METHOD *quic_method);

/* SSL_is_quic returns true if an SSL has been configured for use with QUIC. */
int SSL_is_quic(const SSL *ssl);

/*
 * SSL_quic_max_handshake_flight_len returns returns the maximum number of bytes
 * that may be received at the given encryption level. This function should be
 * used to limit buffering in the QUIC implementation. See RFC 9000 section 7.5.
 */
size_t SSL_quic_max_handshake_flight_len(const SSL *ssl,
    enum ssl_encryption_level_t level);

/*
 * SSL_quic_read_level returns the current read encryption level.
 */
enum ssl_encryption_level_t SSL_quic_read_level(const SSL *ssl);

/*
 * SSL_quic_write_level returns the current write encryption level.
 */
enum ssl_encryption_level_t SSL_quic_write_level(const SSL *ssl);

/*
 * SSL_provide_quic_data provides data from QUIC at a particular encryption
 * level |level|. It returns one on success and zero on error. Note this
 * function will return zero if the handshake is not expecting data from |level|
 * at this time. The QUIC implementation should then close the connection with
 * an error.
 */
int SSL_provide_quic_data(SSL *ssl, enum ssl_encryption_level_t level,
    const uint8_t *data, size_t len);

/*
 * SSL_process_quic_post_handshake processes any data that QUIC has provided
 * after the handshake has completed. This includes NewSessionTicket messages
 * sent by the server. It returns one on success and zero on error.
 */
int SSL_process_quic_post_handshake(SSL *ssl);

/*
 * SSL_set_quic_transport_params configures |ssl| to send |params| (of length
 * |params_len|) in the quic_transport_parameters extension in either the
 * ClientHello or EncryptedExtensions handshake message. It is an error to set
 * transport parameters if |ssl| is not configured for QUIC. The buffer pointed
 * to by |params| only need be valid for the duration of the call to this
 * function. This function returns 1 on success and 0 on failure.
 */
int SSL_set_quic_transport_params(SSL *ssl, const uint8_t *params,
    size_t params_len);

/*
 * SSL_get_peer_quic_transport_params provides the caller with the value of the
 * quic_transport_parameters extension sent by the peer. A pointer to the buffer
 * containing the TransportParameters will be put in |*out_params|, and its
 * length in |*params_len|. This buffer will be valid for the lifetime of the
 * |SSL|. If no params were received from the peer, |*out_params_len| will be 0.
 */
void SSL_get_peer_quic_transport_params(const SSL *ssl,
    const uint8_t **out_params, size_t *out_params_len);

/*
 * SSL_set_quic_use_legacy_codepoint configures whether to use the legacy QUIC
 * extension codepoint 0xffa5 as opposed to the official value 57. This is
 * unsupported in LibreSSL.
 */
void SSL_set_quic_use_legacy_codepoint(SSL *ssl, int use_legacy);

#endif

void ERR_load_SSL_strings(void);

/* Error codes for the SSL functions. */

/* Function codes. */
#define SSL_F_CLIENT_CERTIFICATE                         100
#define SSL_F_CLIENT_FINISHED                            167
#define SSL_F_CLIENT_HELLO                               101
#define SSL_F_CLIENT_MASTER_KEY                          102
#define SSL_F_D2I_SSL_SESSION                            103
#define SSL_F_DO_DTLS1_WRITE                             245
#define SSL_F_DO_SSL3_WRITE                              104
#define SSL_F_DTLS1_ACCEPT                               246
#define SSL_F_DTLS1_ADD_CERT_TO_BUF                      295
#define SSL_F_DTLS1_BUFFER_RECORD                        247
#define SSL_F_DTLS1_CHECK_TIMEOUT_NUM                    316
#define SSL_F_DTLS1_CLIENT_HELLO                         248
#define SSL_F_DTLS1_CONNECT                              249
#define SSL_F_DTLS1_ENC                                  250
#define SSL_F_DTLS1_GET_HELLO_VERIFY                     251
#define SSL_F_DTLS1_GET_MESSAGE                          252
#define SSL_F_DTLS1_GET_MESSAGE_FRAGMENT                 253
#define SSL_F_DTLS1_GET_RECORD                           254
#define SSL_F_DTLS1_HANDLE_TIMEOUT                       297
#define SSL_F_DTLS1_HEARTBEAT                            305
#define SSL_F_DTLS1_OUTPUT_CERT_CHAIN                    255
#define SSL_F_DTLS1_PREPROCESS_FRAGMENT                  288
#define SSL_F_DTLS1_PROCESS_OUT_OF_SEQ_MESSAGE           256
#define SSL_F_DTLS1_PROCESS_RECORD                       257
#define SSL_F_DTLS1_READ_BYTES                           258
#define SSL_F_DTLS1_READ_FAILED                          259
#define SSL_F_DTLS1_SEND_CERTIFICATE_REQUEST             260
#define SSL_F_DTLS1_SEND_CLIENT_CERTIFICATE              261
#define SSL_F_DTLS1_SEND_CLIENT_KEY_EXCHANGE             262
#define SSL_F_DTLS1_SEND_CLIENT_VERIFY                   263
#define SSL_F_DTLS1_SEND_HELLO_VERIFY_REQUEST            264
#define SSL_F_DTLS1_SEND_SERVER_CERTIFICATE              265
#define SSL_F_DTLS1_SEND_SERVER_HELLO                    266
#define SSL_F_DTLS1_SEND_SERVER_KEY_EXCHANGE             267
#define SSL_F_DTLS1_WRITE_APP_DATA_BYTES                 268
#define SSL_F_GET_CLIENT_FINISHED                        105
#define SSL_F_GET_CLIENT_HELLO                           106
#define SSL_F_GET_CLIENT_MASTER_KEY                      107
#define SSL_F_GET_SERVER_FINISHED                        108
#define SSL_F_GET_SERVER_HELLO                           109
#define SSL_F_GET_SERVER_VERIFY                          110
#define SSL_F_I2D_SSL_SESSION                            111
#define SSL_F_READ_N                                     112
#define SSL_F_REQUEST_CERTIFICATE                        113
#define SSL_F_SERVER_FINISH                              239
#define SSL_F_SERVER_HELLO                               114
#define SSL_F_SERVER_VERIFY                              240
#define SSL_F_SSL23_ACCEPT                               115
#define SSL_F_SSL23_CLIENT_HELLO                         116
#define SSL_F_SSL23_CONNECT                              117
#define SSL_F_SSL23_GET_CLIENT_HELLO                     118
#define SSL_F_SSL23_GET_SERVER_HELLO                     119
#define SSL_F_SSL23_PEEK                                 237
#define SSL_F_SSL23_READ                                 120
#define SSL_F_SSL23_WRITE                                121
#define SSL_F_SSL2_ACCEPT                                122
#define SSL_F_SSL2_CONNECT                               123
#define SSL_F_SSL2_ENC_INIT                              124
#define SSL_F_SSL2_GENERATE_KEY_MATERIAL                 241
#define SSL_F_SSL2_PEEK                                  234
#define SSL_F_SSL2_READ                                  125
#define SSL_F_SSL2_READ_INTERNAL                         236
#define SSL_F_SSL2_SET_CERTIFICATE                       126
#define SSL_F_SSL2_WRITE                                 127
#define SSL_F_SSL3_ACCEPT                                128
#define SSL_F_SSL3_ADD_CERT_TO_BUF                       296
#define SSL_F_SSL3_CALLBACK_CTRL                         233
#define SSL_F_SSL3_CHANGE_CIPHER_STATE                   129
#define SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM              130
#define SSL_F_SSL3_CHECK_CLIENT_HELLO                    304
#define SSL_F_SSL3_CLIENT_HELLO                          131
#define SSL_F_SSL3_CONNECT                               132
#define SSL_F_SSL3_CTRL                                  213
#define SSL_F_SSL3_CTX_CTRL                              133
#define SSL_F_SSL3_DIGEST_CACHED_RECORDS                 293
#define SSL_F_SSL3_DO_CHANGE_CIPHER_SPEC                 292
#define SSL_F_SSL3_ENC                                   134
#define SSL_F_SSL3_GENERATE_KEY_BLOCK                    238
#define SSL_F_SSL3_GET_CERTIFICATE_REQUEST               135
#define SSL_F_SSL3_GET_CERT_STATUS                       289
#define SSL_F_SSL3_GET_CERT_VERIFY                       136
#define SSL_F_SSL3_GET_CLIENT_CERTIFICATE                137
#define SSL_F_SSL3_GET_CLIENT_HELLO                      138
#define SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE               139
#define SSL_F_SSL3_GET_FINISHED                          140
#define SSL_F_SSL3_GET_KEY_EXCHANGE                      141
#define SSL_F_SSL3_GET_MESSAGE                           142
#define SSL_F_SSL3_GET_NEW_SESSION_TICKET                283
#define SSL_F_SSL3_GET_NEXT_PROTO                        306
#define SSL_F_SSL3_GET_RECORD                            143
#define SSL_F_SSL3_GET_SERVER_CERTIFICATE                144
#define SSL_F_SSL3_GET_SERVER_DONE                       145
#define SSL_F_SSL3_GET_SERVER_HELLO                      146
#define SSL_F_SSL3_HANDSHAKE_MAC                         285
#define SSL_F_SSL3_NEW_SESSION_TICKET                    287
#define SSL_F_SSL3_OUTPUT_CERT_CHAIN                     147
#define SSL_F_SSL3_PEEK                                  235
#define SSL_F_SSL3_READ_BYTES                            148
#define SSL_F_SSL3_READ_N                                149
#define SSL_F_SSL3_SEND_CERTIFICATE_REQUEST              150
#define SSL_F_SSL3_SEND_CLIENT_CERTIFICATE               151
#define SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE              152
#define SSL_F_SSL3_SEND_CLIENT_VERIFY                    153
#define SSL_F_SSL3_SEND_SERVER_CERTIFICATE               154
#define SSL_F_SSL3_SEND_SERVER_HELLO                     242
#define SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE              155
#define SSL_F_SSL3_SETUP_KEY_BLOCK                       157
#define SSL_F_SSL3_SETUP_READ_BUFFER                     156
#define SSL_F_SSL3_SETUP_WRITE_BUFFER                    291
#define SSL_F_SSL3_WRITE_BYTES                           158
#define SSL_F_SSL3_WRITE_PENDING                         159
#define SSL_F_SSL_ADD_CLIENTHELLO_RENEGOTIATE_EXT        298
#define SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT                 277
#define SSL_F_SSL_ADD_CLIENTHELLO_USE_SRTP_EXT           307
#define SSL_F_SSL_ADD_DIR_CERT_SUBJECTS_TO_STACK         215
#define SSL_F_SSL_ADD_FILE_CERT_SUBJECTS_TO_STACK        216
#define SSL_F_SSL_ADD_SERVERHELLO_RENEGOTIATE_EXT        299
#define SSL_F_SSL_ADD_SERVERHELLO_TLSEXT                 278
#define SSL_F_SSL_ADD_SERVERHELLO_USE_SRTP_EXT           308
#define SSL_F_SSL_BAD_METHOD                             160
#define SSL_F_SSL_BYTES_TO_CIPHER_LIST                   161
#define SSL_F_SSL_CERT_DUP                               221
#define SSL_F_SSL_CERT_INST                              222
#define SSL_F_SSL_CERT_INSTANTIATE                       214
#define SSL_F_SSL_CERT_NEW                               162
#define SSL_F_SSL_CHECK_PRIVATE_KEY                      163
#define SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT               280
#define SSL_F_SSL_CHECK_SRVR_ECC_CERT_AND_ALG            279
#define SSL_F_SSL_CIPHER_PROCESS_RULESTR                 230
#define SSL_F_SSL_CIPHER_STRENGTH_SORT                   231
#define SSL_F_SSL_CLEAR                                  164
#define SSL_F_SSL_COMP_ADD_COMPRESSION_METHOD            165
#define SSL_F_SSL_CREATE_CIPHER_LIST                     166
#define SSL_F_SSL_CTRL                                   232
#define SSL_F_SSL_CTX_CHECK_PRIVATE_KEY                  168
#define SSL_F_SSL_CTX_MAKE_PROFILES                      309
#define SSL_F_SSL_CTX_NEW                                169
#define SSL_F_SSL_CTX_SET_CIPHER_LIST                    269
#define SSL_F_SSL_CTX_SET_CLIENT_CERT_ENGINE             290
#define SSL_F_SSL_CTX_SET_PURPOSE                        226
#define SSL_F_SSL_CTX_SET_SESSION_ID_CONTEXT             219
#define SSL_F_SSL_CTX_SET_SSL_VERSION                    170
#define SSL_F_SSL_CTX_SET_TRUST                          229
#define SSL_F_SSL_CTX_USE_CERTIFICATE                    171
#define SSL_F_SSL_CTX_USE_CERTIFICATE_ASN1               172
#define SSL_F_SSL_CTX_USE_CERTIFICATE_CHAIN_FILE         220
#define SSL_F_SSL_CTX_USE_CERTIFICATE_FILE               173
#define SSL_F_SSL_CTX_USE_PRIVATEKEY                     174
#define SSL_F_SSL_CTX_USE_PRIVATEKEY_ASN1                175
#define SSL_F_SSL_CTX_USE_PRIVATEKEY_FILE                176
#define SSL_F_SSL_CTX_USE_PSK_IDENTITY_HINT              272
#define SSL_F_SSL_CTX_USE_RSAPRIVATEKEY                  177
#define SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_ASN1             178
#define SSL_F_SSL_CTX_USE_RSAPRIVATEKEY_FILE             179
#define SSL_F_SSL_DO_HANDSHAKE                           180
#define SSL_F_SSL_GET_NEW_SESSION                        181
#define SSL_F_SSL_GET_PREV_SESSION                       217
#define SSL_F_SSL_GET_SERVER_SEND_CERT                   182
#define SSL_F_SSL_GET_SERVER_SEND_PKEY                   317
#define SSL_F_SSL_GET_SIGN_PKEY                          183
#define SSL_F_SSL_INIT_WBIO_BUFFER                       184
#define SSL_F_SSL_LOAD_CLIENT_CA_FILE                    185
#define SSL_F_SSL_NEW                                    186
#define SSL_F_SSL_PARSE_CLIENTHELLO_RENEGOTIATE_EXT      300
#define SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT               302
#define SSL_F_SSL_PARSE_CLIENTHELLO_USE_SRTP_EXT         310
#define SSL_F_SSL_PARSE_SERVERHELLO_RENEGOTIATE_EXT      301
#define SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT               303
#define SSL_F_SSL_PARSE_SERVERHELLO_USE_SRTP_EXT         311
#define SSL_F_SSL_PEEK                                   270
#define SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT             281
#define SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT             282
#define SSL_F_SSL_READ                                   223
#define SSL_F_SSL_RSA_PRIVATE_DECRYPT                    187
#define SSL_F_SSL_RSA_PUBLIC_ENCRYPT                     188
#define SSL_F_SSL_SESSION_NEW                            189
#define SSL_F_SSL_SESSION_PRINT_FP                       190
#define SSL_F_SSL_SESSION_SET1_ID_CONTEXT                312
#define SSL_F_SSL_SESS_CERT_NEW                          225
#define SSL_F_SSL_SET_CERT                               191
#define SSL_F_SSL_SET_CIPHER_LIST                        271
#define SSL_F_SSL_SET_FD                                 192
#define SSL_F_SSL_SET_PKEY                               193
#define SSL_F_SSL_SET_PURPOSE                            227
#define SSL_F_SSL_SET_RFD                                194
#define SSL_F_SSL_SET_SESSION                            195
#define SSL_F_SSL_SET_SESSION_ID_CONTEXT                 218
#define SSL_F_SSL_SET_SESSION_TICKET_EXT                 294
#define SSL_F_SSL_SET_TRUST                              228
#define SSL_F_SSL_SET_WFD                                196
#define SSL_F_SSL_SHUTDOWN                               224
#define SSL_F_SSL_SRP_CTX_INIT                           313
#define SSL_F_SSL_UNDEFINED_CONST_FUNCTION               243
#define SSL_F_SSL_UNDEFINED_FUNCTION                     197
#define SSL_F_SSL_UNDEFINED_VOID_FUNCTION                244
#define SSL_F_SSL_USE_CERTIFICATE                        198
#define SSL_F_SSL_USE_CERTIFICATE_ASN1                   199
#define SSL_F_SSL_USE_CERTIFICATE_FILE                   200
#define SSL_F_SSL_USE_PRIVATEKEY                         201
#define SSL_F_SSL_USE_PRIVATEKEY_ASN1                    202
#define SSL_F_SSL_USE_PRIVATEKEY_FILE                    203
#define SSL_F_SSL_USE_PSK_IDENTITY_HINT                  273
#define SSL_F_SSL_USE_RSAPRIVATEKEY                      204
#define SSL_F_SSL_USE_RSAPRIVATEKEY_ASN1                 205
#define SSL_F_SSL_USE_RSAPRIVATEKEY_FILE                 206
#define SSL_F_SSL_VERIFY_CERT_CHAIN                      207
#define SSL_F_SSL_WRITE                                  208
#define SSL_F_TLS1_AEAD_CTX_INIT                         339
#define SSL_F_TLS1_CERT_VERIFY_MAC                       286
#define SSL_F_TLS1_CHANGE_CIPHER_STATE                   209
#define SSL_F_TLS1_CHANGE_CIPHER_STATE_AEAD              340
#define SSL_F_TLS1_CHANGE_CIPHER_STATE_CIPHER            338
#define SSL_F_TLS1_CHECK_SERVERHELLO_TLSEXT              274
#define SSL_F_TLS1_ENC                                   210
#define SSL_F_TLS1_EXPORT_KEYING_MATERIAL                314
#define SSL_F_TLS1_HEARTBEAT                             315
#define SSL_F_TLS1_PREPARE_CLIENTHELLO_TLSEXT            275
#define SSL_F_TLS1_PREPARE_SERVERHELLO_TLSEXT            276
#define SSL_F_TLS1_PRF                                   284
#define SSL_F_TLS1_SETUP_KEY_BLOCK                       211
#define SSL_F_WRITE_PENDING                              212

/* Reason codes. */
#define SSL_R_APP_DATA_IN_HANDSHAKE                      100
#define SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT 272
#define SSL_R_BAD_ALERT_RECORD                           101
#define SSL_R_BAD_AUTHENTICATION_TYPE                    102
#define SSL_R_BAD_CHANGE_CIPHER_SPEC                     103
#define SSL_R_BAD_CHECKSUM                               104
#define SSL_R_BAD_DATA_RETURNED_BY_CALLBACK              106
#define SSL_R_BAD_DECOMPRESSION                          107
#define SSL_R_BAD_DH_G_LENGTH                            108
#define SSL_R_BAD_DH_PUB_KEY_LENGTH                      109
#define SSL_R_BAD_DH_P_LENGTH                            110
#define SSL_R_BAD_DIGEST_LENGTH                          111
#define SSL_R_BAD_DSA_SIGNATURE                          112
#define SSL_R_BAD_ECC_CERT                               304
#define SSL_R_BAD_ECDSA_SIGNATURE                        305
#define SSL_R_BAD_ECPOINT                                306
#define SSL_R_BAD_HANDSHAKE_LENGTH                       332
#define SSL_R_BAD_HELLO_REQUEST                          105
#define SSL_R_BAD_LENGTH                                 271
#define SSL_R_BAD_MAC_DECODE                             113
#define SSL_R_BAD_MAC_LENGTH                             333
#define SSL_R_BAD_MESSAGE_TYPE                           114
#define SSL_R_BAD_PACKET_LENGTH                          115
#define SSL_R_BAD_PROTOCOL_VERSION_NUMBER                116
#define SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH               316
#define SSL_R_BAD_RESPONSE_ARGUMENT                      117
#define SSL_R_BAD_RSA_DECRYPT                            118
#define SSL_R_BAD_RSA_ENCRYPT                            119
#define SSL_R_BAD_RSA_E_LENGTH                           120
#define SSL_R_BAD_RSA_MODULUS_LENGTH                     121
#define SSL_R_BAD_RSA_SIGNATURE                          122
#define SSL_R_BAD_SIGNATURE                              123
#define SSL_R_BAD_SRP_A_LENGTH                           347
#define SSL_R_BAD_SRP_B_LENGTH                           348
#define SSL_R_BAD_SRP_G_LENGTH                           349
#define SSL_R_BAD_SRP_N_LENGTH                           350
#define SSL_R_BAD_SRP_S_LENGTH                           351
#define SSL_R_BAD_SRTP_MKI_VALUE                         352
#define SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST           353
#define SSL_R_BAD_SSL_FILETYPE                           124
#define SSL_R_BAD_SSL_SESSION_ID_LENGTH                  125
#define SSL_R_BAD_STATE                                  126
#define SSL_R_BAD_WRITE_RETRY                            127
#define SSL_R_BIO_NOT_SET                                128
#define SSL_R_BLOCK_CIPHER_PAD_IS_WRONG                  129
#define SSL_R_BN_LIB                                     130
#define SSL_R_CA_DN_LENGTH_MISMATCH                      131
#define SSL_R_CA_DN_TOO_LONG                             132
#define SSL_R_CA_KEY_TOO_SMALL                           397
#define SSL_R_CA_MD_TOO_WEAK                             398
#define SSL_R_CCS_RECEIVED_EARLY                         133
#define SSL_R_CERTIFICATE_VERIFY_FAILED                  134
#define SSL_R_CERT_LENGTH_MISMATCH                       135
#define SSL_R_CHALLENGE_IS_DIFFERENT                     136
#define SSL_R_CIPHER_CODE_WRONG_LENGTH                   137
#define SSL_R_CIPHER_COMPRESSION_UNAVAILABLE             371
#define SSL_R_CIPHER_OR_HASH_UNAVAILABLE                 138
#define SSL_R_CIPHER_TABLE_SRC_ERROR                     139
#define SSL_R_CLIENTHELLO_TLSEXT                         226
#define SSL_R_COMPRESSED_LENGTH_TOO_LONG                 140
#define SSL_R_COMPRESSION_DISABLED                       343
#define SSL_R_COMPRESSION_FAILURE                        141
#define SSL_R_COMPRESSION_ID_NOT_WITHIN_PRIVATE_RANGE    307
#define SSL_R_COMPRESSION_LIBRARY_ERROR                  142
#define SSL_R_CONNECTION_ID_IS_DIFFERENT                 143
#define SSL_R_CONNECTION_TYPE_NOT_SET                    144
#define SSL_R_COOKIE_MISMATCH                            308
#define SSL_R_DATA_BETWEEN_CCS_AND_FINISHED              145
#define SSL_R_DATA_LENGTH_TOO_LONG                       146
#define SSL_R_DECRYPTION_FAILED                          147
#define SSL_R_DECRYPTION_FAILED_OR_BAD_RECORD_MAC        281
#define SSL_R_DH_KEY_TOO_SMALL                           394
#define SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG            148
#define SSL_R_DIGEST_CHECK_FAILED                        149
#define SSL_R_DTLS_MESSAGE_TOO_BIG                       334
#define SSL_R_DUPLICATE_COMPRESSION_ID                   309
#define SSL_R_ECC_CERT_NOT_FOR_KEY_AGREEMENT             317
#define SSL_R_ECC_CERT_NOT_FOR_SIGNING                   318
#define SSL_R_ECC_CERT_SHOULD_HAVE_RSA_SIGNATURE         322
#define SSL_R_ECC_CERT_SHOULD_HAVE_SHA1_SIGNATURE        323
#define SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER               310
#define SSL_R_EE_KEY_TOO_SMALL                           399
#define SSL_R_EMPTY_SRTP_PROTECTION_PROFILE_LIST         354
#define SSL_R_ENCRYPTED_LENGTH_TOO_LONG                  150
#define SSL_R_ERROR_GENERATING_TMP_RSA_KEY               282
#define SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST              151
#define SSL_R_EXCESSIVE_MESSAGE_SIZE                     152
#define SSL_R_EXTRA_DATA_IN_MESSAGE                      153
#define SSL_R_GOT_A_FIN_BEFORE_A_CCS                     154
#define SSL_R_GOT_NEXT_PROTO_BEFORE_A_CCS                355
#define SSL_R_GOT_NEXT_PROTO_WITHOUT_EXTENSION           356
#define SSL_R_HTTPS_PROXY_REQUEST                        155
#define SSL_R_HTTP_REQUEST                               156
#define SSL_R_ILLEGAL_PADDING                            283
#define SSL_R_INAPPROPRIATE_FALLBACK                     373
#define SSL_R_INCONSISTENT_COMPRESSION                   340
#define SSL_R_INVALID_CHALLENGE_LENGTH                   158
#define SSL_R_INVALID_COMMAND                            280
#define SSL_R_INVALID_COMPRESSION_ALGORITHM              341
#define SSL_R_INVALID_PURPOSE                            278
#define SSL_R_INVALID_SRP_USERNAME                       357
#define SSL_R_INVALID_STATUS_RESPONSE                    328
#define SSL_R_INVALID_TICKET_KEYS_LENGTH                 325
#define SSL_R_INVALID_TRUST                              279
#define SSL_R_KEY_ARG_TOO_LONG                           284
#define SSL_R_KRB5                                       285
#define SSL_R_KRB5_C_CC_PRINC                            286
#define SSL_R_KRB5_C_GET_CRED                            287
#define SSL_R_KRB5_C_INIT                                288
#define SSL_R_KRB5_C_MK_REQ                              289
#define SSL_R_KRB5_S_BAD_TICKET                          290
#define SSL_R_KRB5_S_INIT                                291
#define SSL_R_KRB5_S_RD_REQ                              292
#define SSL_R_KRB5_S_TKT_EXPIRED                         293
#define SSL_R_KRB5_S_TKT_NYV                             294
#define SSL_R_KRB5_S_TKT_SKEW                            295
#define SSL_R_LENGTH_MISMATCH                            159
#define SSL_R_LENGTH_TOO_SHORT                           160
#define SSL_R_LIBRARY_BUG                                274
#define SSL_R_LIBRARY_HAS_NO_CIPHERS                     161
#define SSL_R_MESSAGE_TOO_LONG                           296
#define SSL_R_MISSING_DH_DSA_CERT                        162
#define SSL_R_MISSING_DH_KEY                             163
#define SSL_R_MISSING_DH_RSA_CERT                        164
#define SSL_R_MISSING_DSA_SIGNING_CERT                   165
#define SSL_R_MISSING_EXPORT_TMP_DH_KEY                  166
#define SSL_R_MISSING_EXPORT_TMP_RSA_KEY                 167
#define SSL_R_MISSING_RSA_CERTIFICATE                    168
#define SSL_R_MISSING_RSA_ENCRYPTING_CERT                169
#define SSL_R_MISSING_RSA_SIGNING_CERT                   170
#define SSL_R_MISSING_SRP_PARAM                          358
#define SSL_R_MISSING_TMP_DH_KEY                         171
#define SSL_R_MISSING_TMP_ECDH_KEY                       311
#define SSL_R_MISSING_TMP_RSA_KEY                        172
#define SSL_R_MISSING_TMP_RSA_PKEY                       173
#define SSL_R_MISSING_VERIFY_MESSAGE                     174
#define SSL_R_MULTIPLE_SGC_RESTARTS                      346
#define SSL_R_NON_SSLV2_INITIAL_PACKET                   175
#define SSL_R_NO_APPLICATION_PROTOCOL                    235
#define SSL_R_NO_CERTIFICATES_RETURNED                   176
#define SSL_R_NO_CERTIFICATE_ASSIGNED                    177
#define SSL_R_NO_CERTIFICATE_RETURNED                    178
#define SSL_R_NO_CERTIFICATE_SET                         179
#define SSL_R_NO_CERTIFICATE_SPECIFIED                   180
#define SSL_R_NO_CIPHERS_AVAILABLE                       181
#define SSL_R_NO_CIPHERS_PASSED                          182
#define SSL_R_NO_CIPHERS_SPECIFIED                       183
#define SSL_R_NO_CIPHER_LIST                             184
#define SSL_R_NO_CIPHER_MATCH                            185
#define SSL_R_NO_CLIENT_CERT_METHOD                      331
#define SSL_R_NO_CLIENT_CERT_RECEIVED                    186
#define SSL_R_NO_COMPRESSION_SPECIFIED                   187
#define SSL_R_NO_METHOD_SPECIFIED                        188
#define SSL_R_NO_PRIVATEKEY                              189
#define SSL_R_NO_PRIVATE_KEY_ASSIGNED                    190
#define SSL_R_NO_PROTOCOLS_AVAILABLE                     191
#define SSL_R_NO_PUBLICKEY                               192
#define SSL_R_NO_RENEGOTIATION                           339
#define SSL_R_NO_REQUIRED_DIGEST                         324
#define SSL_R_NO_SHARED_CIPHER                           193
#define SSL_R_NO_SRTP_PROFILES                           359
#define SSL_R_NO_VERIFY_CALLBACK                         194
#define SSL_R_NULL_SSL_CTX                               195
#define SSL_R_NULL_SSL_METHOD_PASSED                     196
#define SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED            197
#define SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED 344
#define SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE              297
#define SSL_R_PACKET_LENGTH_TOO_LONG                     198
#define SSL_R_PARSE_TLSEXT                               227
#define SSL_R_PATH_TOO_LONG                              270
#define SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE          199
#define SSL_R_PEER_ERROR                                 200
#define SSL_R_PEER_ERROR_CERTIFICATE                     201
#define SSL_R_PEER_ERROR_NO_CERTIFICATE                  202
#define SSL_R_PEER_ERROR_NO_CIPHER                       203
#define SSL_R_PEER_ERROR_UNSUPPORTED_CERTIFICATE_TYPE    204
#define SSL_R_PRE_MAC_LENGTH_TOO_LONG                    205
#define SSL_R_PROBLEMS_MAPPING_CIPHER_FUNCTIONS          206
#define SSL_R_PROTOCOL_IS_SHUTDOWN                       207
#define SSL_R_PSK_IDENTITY_NOT_FOUND                     223
#define SSL_R_PSK_NO_CLIENT_CB                           224
#define SSL_R_PSK_NO_SERVER_CB                           225
#define SSL_R_PUBLIC_KEY_ENCRYPT_ERROR                   208
#define SSL_R_PUBLIC_KEY_IS_NOT_RSA                      209
#define SSL_R_PUBLIC_KEY_NOT_RSA                         210
#define SSL_R_READ_BIO_NOT_SET                           211
#define SSL_R_READ_TIMEOUT_EXPIRED                       312
#define SSL_R_READ_WRONG_PACKET_TYPE                     212
#define SSL_R_RECORD_LENGTH_MISMATCH                     213
#define SSL_R_RECORD_TOO_LARGE                           214
#define SSL_R_RECORD_TOO_SMALL                           298
#define SSL_R_RENEGOTIATE_EXT_TOO_LONG                   335
#define SSL_R_RENEGOTIATION_ENCODING_ERR                 336
#define SSL_R_RENEGOTIATION_MISMATCH                     337
#define SSL_R_REQUIRED_CIPHER_MISSING                    215
#define SSL_R_REQUIRED_COMPRESSSION_ALGORITHM_MISSING    342
#define SSL_R_REUSE_CERT_LENGTH_NOT_ZERO                 216
#define SSL_R_REUSE_CERT_TYPE_NOT_ZERO                   217
#define SSL_R_REUSE_CIPHER_LIST_NOT_ZERO                 218
#define SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING           345
#define SSL_R_SERVERHELLO_TLSEXT                         275
#define SSL_R_SESSION_ID_CONTEXT_UNINITIALIZED           277
#define SSL_R_SHORT_READ                                 219
#define SSL_R_SIGNATURE_ALGORITHMS_ERROR                 360
#define SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE      220
#define SSL_R_SRP_A_CALC                                 361
#define SSL_R_SRTP_COULD_NOT_ALLOCATE_PROFILES           362
#define SSL_R_SRTP_PROTECTION_PROFILE_LIST_TOO_LONG      363
#define SSL_R_SRTP_UNKNOWN_PROTECTION_PROFILE            364
#define SSL_R_SSL23_DOING_SESSION_ID_REUSE               221
#define SSL_R_SSL2_CONNECTION_ID_TOO_LONG                299
#define SSL_R_SSL3_EXT_INVALID_ECPOINTFORMAT             321
#define SSL_R_SSL3_EXT_INVALID_SERVERNAME                319
#define SSL_R_SSL3_EXT_INVALID_SERVERNAME_TYPE           320
#define SSL_R_SSL3_SESSION_ID_TOO_LONG                   300
#define SSL_R_SSL3_SESSION_ID_TOO_SHORT                  222
#define SSL_R_SSLV3_ALERT_BAD_CERTIFICATE                1042
#define SSL_R_SSLV3_ALERT_BAD_RECORD_MAC                 1020
#define SSL_R_SSLV3_ALERT_CERTIFICATE_EXPIRED            1045
#define SSL_R_SSLV3_ALERT_CERTIFICATE_REVOKED            1044
#define SSL_R_SSLV3_ALERT_CERTIFICATE_UNKNOWN            1046
#define SSL_R_SSLV3_ALERT_DECOMPRESSION_FAILURE          1030
#define SSL_R_SSLV3_ALERT_HANDSHAKE_FAILURE              1040
#define SSL_R_SSLV3_ALERT_ILLEGAL_PARAMETER              1047
#define SSL_R_SSLV3_ALERT_NO_CERTIFICATE                 1041
#define SSL_R_SSLV3_ALERT_UNEXPECTED_MESSAGE             1010
#define SSL_R_SSLV3_ALERT_UNSUPPORTED_CERTIFICATE        1043
#define SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION         228
#define SSL_R_SSL_HANDSHAKE_FAILURE                      229
#define SSL_R_SSL_LIBRARY_HAS_NO_CIPHERS                 230
#define SSL_R_SSL_SESSION_ID_CALLBACK_FAILED             301
#define SSL_R_SSL_SESSION_ID_CONFLICT                    302
#define SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG            273
#define SSL_R_SSL_SESSION_ID_HAS_BAD_LENGTH              303
#define SSL_R_SSL_SESSION_ID_IS_DIFFERENT                231
#define SSL_R_SSL_SESSION_ID_TOO_LONG                    408
#define SSL_R_TLSV13_ALERT_MISSING_EXTENSION             1109
#define SSL_R_TLSV13_ALERT_CERTIFICATE_REQUIRED          1116
#define SSL_R_TLSV1_ALERT_ACCESS_DENIED                  1049
#define SSL_R_TLSV1_ALERT_NO_APPLICATION_PROTOCOL        1120
#define SSL_R_TLSV1_ALERT_DECODE_ERROR                   1050
#define SSL_R_TLSV1_ALERT_DECRYPTION_FAILED              1021
#define SSL_R_TLSV1_ALERT_DECRYPT_ERROR                  1051
#define SSL_R_TLSV1_ALERT_EXPORT_RESTRICTION             1060
#define SSL_R_TLSV1_ALERT_INAPPROPRIATE_FALLBACK         1086
#define SSL_R_TLSV1_ALERT_INSUFFICIENT_SECURITY          1071
#define SSL_R_TLSV1_ALERT_INTERNAL_ERROR                 1080
#define SSL_R_TLSV1_ALERT_NO_RENEGOTIATION               1100
#define SSL_R_TLSV1_ALERT_PROTOCOL_VERSION               1070
#define SSL_R_TLSV1_ALERT_RECORD_OVERFLOW                1022
#define SSL_R_TLSV1_ALERT_UNKNOWN_CA                     1048
#define SSL_R_TLSV1_ALERT_UNKNOWN_PSK_IDENTITY           1115
#define SSL_R_TLSV1_ALERT_USER_CANCELLED                 1090
#define SSL_R_TLSV1_BAD_CERTIFICATE_HASH_VALUE           1114
#define SSL_R_TLSV1_BAD_CERTIFICATE_STATUS_RESPONSE      1113
#define SSL_R_TLSV1_CERTIFICATE_UNOBTAINABLE             1111
#define SSL_R_TLSV1_UNRECOGNIZED_NAME                    1112
#define SSL_R_TLSV1_UNSUPPORTED_EXTENSION                1110
#define SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER       232
#define SSL_R_TLS_HEARTBEAT_PEER_DOESNT_ACCEPT           365
#define SSL_R_TLS_HEARTBEAT_PENDING                      366
#define SSL_R_TLS_ILLEGAL_EXPORTER_LABEL                 367
#define SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST             157
#define SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST 233
#define SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG    234
#define SSL_R_UNABLE_TO_DECODE_DH_CERTS                  236
#define SSL_R_UNABLE_TO_DECODE_ECDH_CERTS                313
#define SSL_R_UNABLE_TO_EXTRACT_PUBLIC_KEY               237
#define SSL_R_UNABLE_TO_FIND_DH_PARAMETERS               238
#define SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS             314
#define SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS       239
#define SSL_R_UNABLE_TO_FIND_SSL_METHOD                  240
#define SSL_R_UNABLE_TO_LOAD_SSL2_MD5_ROUTINES           241
#define SSL_R_UNABLE_TO_LOAD_SSL3_MD5_ROUTINES           242
#define SSL_R_UNABLE_TO_LOAD_SSL3_SHA1_ROUTINES          243
#define SSL_R_UNEXPECTED_MESSAGE                         244
#define SSL_R_UNEXPECTED_RECORD                          245
#define SSL_R_UNINITIALIZED                              276
#define SSL_R_UNKNOWN_ALERT_TYPE                         246
#define SSL_R_UNKNOWN_CERTIFICATE_TYPE                   247
#define SSL_R_UNKNOWN_CIPHER_RETURNED                    248
#define SSL_R_UNKNOWN_CIPHER_TYPE                        249
#define SSL_R_UNKNOWN_DIGEST                             368
#define SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE                  250
#define SSL_R_UNKNOWN_PKEY_TYPE                          251
#define SSL_R_UNKNOWN_PROTOCOL                           252
#define SSL_R_UNKNOWN_REMOTE_ERROR_TYPE                  253
#define SSL_R_UNKNOWN_SSL_VERSION                        254
#define SSL_R_UNKNOWN_STATE                              255
#define SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED       338
#define SSL_R_UNSUPPORTED_CIPHER                         256
#define SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM          257
#define SSL_R_UNSUPPORTED_DIGEST_TYPE                    326
#define SSL_R_UNSUPPORTED_ELLIPTIC_CURVE                 315
#define SSL_R_UNSUPPORTED_PROTOCOL                       258
#define SSL_R_UNSUPPORTED_SSL_VERSION                    259
#define SSL_R_UNSUPPORTED_STATUS_TYPE                    329
#define SSL_R_USE_SRTP_NOT_NEGOTIATED                    369
#define SSL_R_VERSION_TOO_LOW                            396
#define SSL_R_WRITE_BIO_NOT_SET                          260
#define SSL_R_WRONG_CIPHER_RETURNED                      261
#define SSL_R_WRONG_CURVE                                378
#define SSL_R_WRONG_MESSAGE_TYPE                         262
#define SSL_R_WRONG_NUMBER_OF_KEY_BITS                   263
#define SSL_R_WRONG_SIGNATURE_LENGTH                     264
#define SSL_R_WRONG_SIGNATURE_SIZE                       265
#define SSL_R_WRONG_SIGNATURE_TYPE                       370
#define SSL_R_WRONG_SSL_VERSION                          266
#define SSL_R_WRONG_VERSION_NUMBER                       267
#define SSL_R_X509_LIB                                   268
#define SSL_R_X509_VERIFICATION_SETUP_PROBLEMS           269
#define SSL_R_PEER_BEHAVING_BADLY                        666
#define SSL_R_QUIC_INTERNAL_ERROR                        667
#define SSL_R_WRONG_ENCRYPTION_LEVEL_RECEIVED            668
#define SSL_R_UNKNOWN                                    999

/*
 * OpenSSL compatible OPENSSL_INIT options
 */

/*
 * These are provided for compatibility, but have no effect
 * on how LibreSSL is initialized.
 */
#define OPENSSL_INIT_LOAD_SSL_STRINGS   _OPENSSL_INIT_FLAG_NOOP
#define OPENSSL_INIT_SSL_DEFAULT        _OPENSSL_INIT_FLAG_NOOP

int OPENSSL_init_ssl(uint64_t opts, const void *settings);
int SSL_library_init(void);

/*
 * A few things still use this without #ifdef guard.
 */

#define SSL2_VERSION    0x0002

#ifdef  __cplusplus
}
#endif
#endif