THUAI6/CAPI/cpp/grpc/include/openssl/ssl.h

/*
 * WARNING: do not edit!
 * Generated by makefile from include\openssl\ssl.h.in
 *
 * Copyright 1995-2022 The OpenSSL Project Authors. All Rights Reserved.
 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
 * Copyright 2005 Nokia. All rights reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#ifndef OPENSSL_SSL_H
#define OPENSSL_SSL_H
#pragma once

#include <openssl/macros.h>
#ifndef OPENSSL_NO_DEPRECATED_3_0
#define HEADER_SSL_H
#endif

#include <openssl/e_os2.h>
#include <openssl/opensslconf.h>
#include <openssl/comp.h>
#include <openssl/bio.h>
#ifndef OPENSSL_NO_DEPRECATED_1_1_0
#include <openssl/x509.h>
#include <openssl/crypto.h>
#include <openssl/buffer.h>
#endif
#include <openssl/lhash.h>
#include <openssl/pem.h>
#include <openssl/hmac.h>
#include <openssl/async.h>

#include <openssl/safestack.h>
#include <openssl/symhacks.h>
#include <openssl/ct.h>
#include <openssl/sslerr.h>
#include <openssl/prov_ssl.h>

#ifdef __cplusplus
extern "C"
{
#endif

/* OpenSSL 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

#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
/* SSL_MAX_MASTER_KEY_LENGTH is defined in prov_ssl.h */

/* The maximum number of encrypt/decrypt pipelines we can support */
#define SSL_MAX_PIPELINES 32

    /* text strings for the ciphers */

    /* 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_FIPS "FIPS"

#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" /* this cipher class has been removed */
#define SSL_TXT_kDHd "kDHd" /* this cipher class has been removed */
#define SSL_TXT_kDH "kDH"   /* this cipher class has been removed */
#define SSL_TXT_kEDH "kEDH" /* alias for kDHE */
#define SSL_TXT_kDHE "kDHE"
#define SSL_TXT_kECDHr "kECDHr" /* this cipher class has been removed */
#define SSL_TXT_kECDHe "kECDHe" /* this cipher class has been removed */
#define SSL_TXT_kECDH "kECDH"   /* this cipher class has been removed */
#define SSL_TXT_kEECDH "kEECDH" /* alias for kECDHE */
#define SSL_TXT_kECDHE "kECDHE"
#define SSL_TXT_kPSK "kPSK"
#define SSL_TXT_kRSAPSK "kRSAPSK"
#define SSL_TXT_kECDHEPSK "kECDHEPSK"
#define SSL_TXT_kDHEPSK "kDHEPSK"
#define SSL_TXT_kGOST "kGOST"
#define SSL_TXT_kGOST18 "kGOST18"
#define SSL_TXT_kSRP "kSRP"

#define SSL_TXT_aRSA "aRSA"
#define SSL_TXT_aDSS "aDSS"
#define SSL_TXT_aDH "aDH"     /* this cipher class has been removed */
#define SSL_TXT_aECDH "aECDH" /* this cipher class has been removed */
#define SSL_TXT_aECDSA "aECDSA"
#define SSL_TXT_aPSK "aPSK"
#define SSL_TXT_aGOST94 "aGOST94"
#define SSL_TXT_aGOST01 "aGOST01"
#define SSL_TXT_aGOST12 "aGOST12"
#define SSL_TXT_aGOST "aGOST"
#define SSL_TXT_aSRP "aSRP"

#define SSL_TXT_DSS "DSS"
#define SSL_TXT_DH "DH"
#define SSL_TXT_DHE "DHE" /* same as "kDHE:-ADH" */
#define SSL_TXT_EDH "EDH" /* alias for DHE */
#define SSL_TXT_ADH "ADH"
#define SSL_TXT_RSA "RSA"
#define SSL_TXT_ECDH "ECDH"
#define SSL_TXT_EECDH "EECDH" /* alias for ECDHE" */
#define SSL_TXT_ECDHE "ECDHE" /* same as "kECDHE:-AECDH" */
#define SSL_TXT_AECDH "AECDH"
#define SSL_TXT_ECDSA "ECDSA"
#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_AES_CCM "AESCCM"
#define SSL_TXT_AES_CCM_8 "AESCCM8"
#define SSL_TXT_CAMELLIA128 "CAMELLIA128"
#define SSL_TXT_CAMELLIA256 "CAMELLIA256"
#define SSL_TXT_CAMELLIA "CAMELLIA"
#define SSL_TXT_CHACHA20 "CHACHA20"
#define SSL_TXT_GOST "GOST89"
#define SSL_TXT_ARIA "ARIA"
#define SSL_TXT_ARIA_GCM "ARIAGCM"
#define SSL_TXT_ARIA128 "ARIA128"
#define SSL_TXT_ARIA256 "ARIA256"
#define SSL_TXT_GOST2012_GOST8912_GOST8912 "GOST2012-GOST8912-GOST8912"
#define SSL_TXT_CBC "CBC"

#define SSL_TXT_MD5 "MD5"
#define SSL_TXT_SHA1 "SHA1"
#define SSL_TXT_SHA "SHA" /* same as "SHA1" */
#define SSL_TXT_GOST94 "GOST94"
#define SSL_TXT_GOST89MAC "GOST89MAC"
#define SSL_TXT_GOST12 "GOST12"
#define SSL_TXT_GOST89MAC12 "GOST89MAC12"
#define SSL_TXT_SHA256 "SHA256"
#define SSL_TXT_SHA384 "SHA384"

#define SSL_TXT_SSLV3 "SSLv3"
#define SSL_TXT_TLSV1 "TLSv1"
#define SSL_TXT_TLSV1_1 "TLSv1.1"
#define SSL_TXT_TLSV1_2 "TLSv1.2"

#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'.
 * This applies to ciphersuites for TLSv1.2 and below.
 * DEPRECATED IN 3.0.0, in favor of OSSL_default_cipher_list()
 * Update both macro and function simultaneously
 */
#ifndef OPENSSL_NO_DEPRECATED_3_0
#define SSL_DEFAULT_CIPHER_LIST "ALL:!COMPLEMENTOFDEFAULT:!eNULL"
/*
 * This is the default set of TLSv1.3 ciphersuites
 * DEPRECATED IN 3.0.0, in favor of OSSL_default_ciphersuites()
 * Update both macro and function simultaneously
 */
#define TLS_DEFAULT_CIPHERSUITES "TLS_AES_256_GCM_SHA384:"       \
                                 "TLS_CHACHA20_POLY1305_SHA256:" \
                                 "TLS_AES_128_GCM_SHA256"
#endif
/*
 * 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

#ifdef __cplusplus
}
#endif

#ifdef __cplusplus
extern "C"
{
#endif

#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 tls_session_ticket_ext_st TLS_SESSION_TICKET_EXT;
    typedef struct ssl_method_st SSL_METHOD;
    typedef struct ssl_cipher_st SSL_CIPHER;
    typedef struct ssl_session_st SSL_SESSION;
    typedef struct tls_sigalgs_st TLS_SIGALGS;
    typedef struct ssl_conf_ctx_st SSL_CONF_CTX;
    typedef struct ssl_comp_st SSL_COMP;

    STACK_OF(SSL_CIPHER);
    STACK_OF(SSL_COMP);

    /* 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;
    SKM_DEFINE_STACK_OF_INTERNAL(SRTP_PROTECTION_PROFILE, SRTP_PROTECTION_PROFILE, SRTP_PROTECTION_PROFILE)
#define sk_SRTP_PROTECTION_PROFILE_num(sk) OPENSSL_sk_num(ossl_check_const_SRTP_PROTECTION_PROFILE_sk_type(sk))
#define sk_SRTP_PROTECTION_PROFILE_value(sk, idx) ((SRTP_PROTECTION_PROFILE*)OPENSSL_sk_value(ossl_check_const_SRTP_PROTECTION_PROFILE_sk_type(sk), (idx)))
#define sk_SRTP_PROTECTION_PROFILE_new(cmp) ((STACK_OF(SRTP_PROTECTION_PROFILE)*)OPENSSL_sk_new(ossl_check_SRTP_PROTECTION_PROFILE_compfunc_type(cmp)))
#define sk_SRTP_PROTECTION_PROFILE_new_null() ((STACK_OF(SRTP_PROTECTION_PROFILE)*)OPENSSL_sk_new_null())
#define sk_SRTP_PROTECTION_PROFILE_new_reserve(cmp, n) ((STACK_OF(SRTP_PROTECTION_PROFILE)*)OPENSSL_sk_new_reserve(ossl_check_SRTP_PROTECTION_PROFILE_compfunc_type(cmp), (n)))
#define sk_SRTP_PROTECTION_PROFILE_reserve(sk, n) OPENSSL_sk_reserve(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk), (n))
#define sk_SRTP_PROTECTION_PROFILE_free(sk) OPENSSL_sk_free(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk))
#define sk_SRTP_PROTECTION_PROFILE_zero(sk) OPENSSL_sk_zero(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk))
#define sk_SRTP_PROTECTION_PROFILE_delete(sk, i) ((SRTP_PROTECTION_PROFILE*)OPENSSL_sk_delete(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk), (i)))
#define sk_SRTP_PROTECTION_PROFILE_delete_ptr(sk, ptr) ((SRTP_PROTECTION_PROFILE*)OPENSSL_sk_delete_ptr(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk), ossl_check_SRTP_PROTECTION_PROFILE_type(ptr)))
#define sk_SRTP_PROTECTION_PROFILE_push(sk, ptr) OPENSSL_sk_push(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk), ossl_check_SRTP_PROTECTION_PROFILE_type(ptr))
#define sk_SRTP_PROTECTION_PROFILE_unshift(sk, ptr) OPENSSL_sk_unshift(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk), ossl_check_SRTP_PROTECTION_PROFILE_type(ptr))
#define sk_SRTP_PROTECTION_PROFILE_pop(sk) ((SRTP_PROTECTION_PROFILE*)OPENSSL_sk_pop(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk)))
#define sk_SRTP_PROTECTION_PROFILE_shift(sk) ((SRTP_PROTECTION_PROFILE*)OPENSSL_sk_shift(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk)))
#define sk_SRTP_PROTECTION_PROFILE_pop_free(sk, freefunc) OPENSSL_sk_pop_free(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk), ossl_check_SRTP_PROTECTION_PROFILE_freefunc_type(freefunc))
#define sk_SRTP_PROTECTION_PROFILE_insert(sk, ptr, idx) OPENSSL_sk_insert(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk), ossl_check_SRTP_PROTECTION_PROFILE_type(ptr), (idx))
#define sk_SRTP_PROTECTION_PROFILE_set(sk, idx, ptr) ((SRTP_PROTECTION_PROFILE*)OPENSSL_sk_set(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk), (idx), ossl_check_SRTP_PROTECTION_PROFILE_type(ptr)))
#define sk_SRTP_PROTECTION_PROFILE_find(sk, ptr) OPENSSL_sk_find(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk), ossl_check_SRTP_PROTECTION_PROFILE_type(ptr))
#define sk_SRTP_PROTECTION_PROFILE_find_ex(sk, ptr) OPENSSL_sk_find_ex(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk), ossl_check_SRTP_PROTECTION_PROFILE_type(ptr))
#define sk_SRTP_PROTECTION_PROFILE_find_all(sk, ptr, pnum) OPENSSL_sk_find_all(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk), ossl_check_SRTP_PROTECTION_PROFILE_type(ptr), pnum)
#define sk_SRTP_PROTECTION_PROFILE_sort(sk) OPENSSL_sk_sort(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk))
#define sk_SRTP_PROTECTION_PROFILE_is_sorted(sk) OPENSSL_sk_is_sorted(ossl_check_const_SRTP_PROTECTION_PROFILE_sk_type(sk))
#define sk_SRTP_PROTECTION_PROFILE_dup(sk) ((STACK_OF(SRTP_PROTECTION_PROFILE)*)OPENSSL_sk_dup(ossl_check_const_SRTP_PROTECTION_PROFILE_sk_type(sk)))
#define sk_SRTP_PROTECTION_PROFILE_deep_copy(sk, copyfunc, freefunc) ((STACK_OF(SRTP_PROTECTION_PROFILE)*)OPENSSL_sk_deep_copy(ossl_check_const_SRTP_PROTECTION_PROFILE_sk_type(sk), ossl_check_SRTP_PROTECTION_PROFILE_copyfunc_type(copyfunc), ossl_check_SRTP_PROTECTION_PROFILE_freefunc_type(freefunc)))
#define sk_SRTP_PROTECTION_PROFILE_set_cmp_func(sk, cmp) ((sk_SRTP_PROTECTION_PROFILE_compfunc)OPENSSL_sk_set_cmp_func(ossl_check_SRTP_PROTECTION_PROFILE_sk_type(sk), ossl_check_SRTP_PROTECTION_PROFILE_compfunc_type(cmp)))

    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);

/* Extension context codes */
/* This extension is only allowed in TLS */
#define SSL_EXT_TLS_ONLY 0x0001
/* This extension is only allowed in DTLS */
#define SSL_EXT_DTLS_ONLY 0x0002
/* Some extensions may be allowed in DTLS but we don't implement them for it */
#define SSL_EXT_TLS_IMPLEMENTATION_ONLY 0x0004
/* Most extensions are not defined for SSLv3 but EXT_TYPE_renegotiate is */
#define SSL_EXT_SSL3_ALLOWED 0x0008
/* Extension is only defined for TLS1.2 and below */
#define SSL_EXT_TLS1_2_AND_BELOW_ONLY 0x0010
/* Extension is only defined for TLS1.3 and above */
#define SSL_EXT_TLS1_3_ONLY 0x0020
/* Ignore this extension during parsing if we are resuming */
#define SSL_EXT_IGNORE_ON_RESUMPTION 0x0040
#define SSL_EXT_CLIENT_HELLO 0x0080
/* Really means TLS1.2 or below */
#define SSL_EXT_TLS1_2_SERVER_HELLO 0x0100
#define SSL_EXT_TLS1_3_SERVER_HELLO 0x0200
#define SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS 0x0400
#define SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST 0x0800
#define SSL_EXT_TLS1_3_CERTIFICATE 0x1000
#define SSL_EXT_TLS1_3_NEW_SESSION_TICKET 0x2000
#define SSL_EXT_TLS1_3_CERTIFICATE_REQUEST 0x4000

    /* Typedefs for handling custom extensions */

    typedef int (*custom_ext_add_cb)(SSL* s, unsigned int ext_type, const unsigned char** out, size_t* outlen, int* al, void* add_arg);

    typedef void (*custom_ext_free_cb)(SSL* s, unsigned int ext_type, const unsigned char* out, void* add_arg);

    typedef int (*custom_ext_parse_cb)(SSL* s, unsigned int ext_type, const unsigned char* in, size_t inlen, int* al, void* parse_arg);

    typedef int (*SSL_custom_ext_add_cb_ex)(SSL* s, unsigned int ext_type, unsigned int context, const unsigned char** out, size_t* outlen, X509* x, size_t chainidx, int* al, void* add_arg);

    typedef void (*SSL_custom_ext_free_cb_ex)(SSL* s, unsigned int ext_type, unsigned int context, const unsigned char* out, void* add_arg);

    typedef int (*SSL_custom_ext_parse_cb_ex)(SSL* s, unsigned int ext_type, unsigned int context, const unsigned char* in, size_t inlen, X509* x, size_t chainidx, int* al, void* parse_arg);

    /* Typedef for verification callback */
    typedef int (*SSL_verify_cb)(int preverify_ok, X509_STORE_CTX* x509_ctx);

    /* Typedef for SSL async callback */
    typedef int (*SSL_async_callback_fn)(SSL* s, void* arg);

#define SSL_OP_BIT(n) ((uint64_t)1 << (uint64_t)n)

    /*
     * SSL/TLS connection options.
     */
    /* Disable Extended master secret */
#define SSL_OP_NO_EXTENDED_MASTER_SECRET SSL_OP_BIT(0)
    /* Cleanse plaintext copies of data delivered to the application */
#define SSL_OP_CLEANSE_PLAINTEXT SSL_OP_BIT(1)
    /* Allow initial connection to servers that don't support RI */
#define SSL_OP_LEGACY_SERVER_CONNECT SSL_OP_BIT(2)
    /* Enable support for Kernel TLS */
#define SSL_OP_ENABLE_KTLS SSL_OP_BIT(3)
#define SSL_OP_TLSEXT_PADDING SSL_OP_BIT(4)
#define SSL_OP_SAFARI_ECDHE_ECDSA_BUG SSL_OP_BIT(6)
#define SSL_OP_IGNORE_UNEXPECTED_EOF SSL_OP_BIT(7)
#define SSL_OP_ALLOW_CLIENT_RENEGOTIATION SSL_OP_BIT(8)
#define SSL_OP_DISABLE_TLSEXT_CA_NAMES SSL_OP_BIT(9)
    /* In TLSv1.3 allow a non-(ec)dhe based kex_mode */
#define SSL_OP_ALLOW_NO_DHE_KEX SSL_OP_BIT(10)
    /*
     * Disable SSL 3.0/TLS 1.0 CBC vulnerability workaround that was added
     * in OpenSSL 0.9.6d.  Usually (depending on the application protocol)
     * the workaround is not needed.  Unfortunately some broken SSL/TLS
     * implementations cannot handle it at all, which is why we include it
     * in SSL_OP_ALL. Added in 0.9.6e
     */
#define SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS SSL_OP_BIT(11)
    /* DTLS options */
#define SSL_OP_NO_QUERY_MTU SSL_OP_BIT(12)
    /* Turn on Cookie Exchange (on relevant for servers) */
#define SSL_OP_COOKIE_EXCHANGE SSL_OP_BIT(13)
    /* Don't use RFC4507 ticket extension */
#define SSL_OP_NO_TICKET SSL_OP_BIT(14)
#ifndef OPENSSL_NO_DTLS1_METHOD
    /*
     * Use Cisco's version identifier of DTLS_BAD_VER
     * (only with deprecated DTLSv1_client_method())
     */
#define SSL_OP_CISCO_ANYCONNECT SSL_OP_BIT(15)
#endif
    /* As server, disallow session resumption on renegotiation */
#define SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION SSL_OP_BIT(16)
    /* Don't use compression even if supported */
#define SSL_OP_NO_COMPRESSION SSL_OP_BIT(17)
    /* Permit unsafe legacy renegotiation */
#define SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION SSL_OP_BIT(18)
    /* Disable encrypt-then-mac */
#define SSL_OP_NO_ENCRYPT_THEN_MAC SSL_OP_BIT(19)
    /*
     * Enable TLSv1.3 Compatibility mode. This is on by default. A future
     * version of OpenSSL may have this disabled by default.
     */
#define SSL_OP_ENABLE_MIDDLEBOX_COMPAT SSL_OP_BIT(20)
    /*
     * Prioritize Chacha20Poly1305 when client does.
     * Modifies SSL_OP_CIPHER_SERVER_PREFERENCE
     */
#define SSL_OP_PRIORITIZE_CHACHA SSL_OP_BIT(21)
    /*
     * Set on servers to choose the cipher according to server's preferences.
     */
#define SSL_OP_CIPHER_SERVER_PREFERENCE SSL_OP_BIT(22)
    /*
     * If set, a server will allow a client to issue a SSLv3.0 version
     * number as latest version supported in the premaster secret, even when
     * TLSv1.0 (version 3.1) was announced in the client hello. Normally
     * this is forbidden to prevent version rollback attacks.
     */
#define SSL_OP_TLS_ROLLBACK_BUG SSL_OP_BIT(23)
    /*
     * Switches off automatic TLSv1.3 anti-replay protection for early data.
     * This is a server-side option only (no effect on the client).
     */
#define SSL_OP_NO_ANTI_REPLAY SSL_OP_BIT(24)
#define SSL_OP_NO_SSLv3 SSL_OP_BIT(25)
#define SSL_OP_NO_TLSv1 SSL_OP_BIT(26)
#define SSL_OP_NO_TLSv1_2 SSL_OP_BIT(27)
#define SSL_OP_NO_TLSv1_1 SSL_OP_BIT(28)
#define SSL_OP_NO_TLSv1_3 SSL_OP_BIT(29)
#define SSL_OP_NO_DTLSv1 SSL_OP_BIT(26)
#define SSL_OP_NO_DTLSv1_2 SSL_OP_BIT(27)
    /* Disallow all renegotiation */
#define SSL_OP_NO_RENEGOTIATION SSL_OP_BIT(30)
    /*
     * Make server add server-hello extension from early version of
     * cryptopro draft, when GOST ciphersuite is negotiated. Required for
     * interoperability with CryptoPro CSP 3.x
     */
#define SSL_OP_CRYPTOPRO_TLSEXT_BUG SSL_OP_BIT(31)

/*
 * Option "collections."
 */
#define SSL_OP_NO_SSL_MASK \
    (SSL_OP_NO_SSLv3 | SSL_OP_NO_TLSv1 | SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1_2 | SSL_OP_NO_TLSv1_3)
#define SSL_OP_NO_DTLS_MASK \
    (SSL_OP_NO_DTLSv1 | SSL_OP_NO_DTLSv1_2)

/* Various bug workarounds that should be rather harmless. */
#define SSL_OP_ALL \
    (SSL_OP_CRYPTOPRO_TLSEXT_BUG | SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS | SSL_OP_TLSEXT_PADDING | SSL_OP_SAFARI_ECDHE_ECDSA_BUG)

    /*
     * OBSOLETE OPTIONS retained for compatibility
     */

#define SSL_OP_MICROSOFT_SESS_ID_BUG 0x0
#define SSL_OP_NETSCAPE_CHALLENGE_BUG 0x0
#define SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG 0x0
#define SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG 0x0
#define SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER 0x0
#define SSL_OP_MSIE_SSLV2_RSA_PADDING 0x0
#define SSL_OP_SSLEAY_080_CLIENT_DH_BUG 0x0
#define SSL_OP_TLS_D5_BUG 0x0
#define SSL_OP_TLS_BLOCK_PADDING_BUG 0x0
#define SSL_OP_SINGLE_ECDH_USE 0x0
#define SSL_OP_SINGLE_DH_USE 0x0
#define SSL_OP_EPHEMERAL_RSA 0x0
#define SSL_OP_NO_SSLv2 0x0
#define SSL_OP_PKCS1_CHECK_1 0x0
#define SSL_OP_PKCS1_CHECK_2 0x0
#define SSL_OP_NETSCAPE_CA_DN_BUG 0x0
#define SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG 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 0x00000001U
/*
 * 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 0x00000002U
/*
 * Never bother the application with retries if the transport is blocking:
 */
#define SSL_MODE_AUTO_RETRY 0x00000004U
/* Don't attempt to automatically build certificate chain */
#define SSL_MODE_NO_AUTO_CHAIN 0x00000008U
/*
 * Save RAM by releasing read and write buffers when they're empty. (SSL3 and
 * TLS only.) Released buffers are freed.
 */
#define SSL_MODE_RELEASE_BUFFERS 0x00000010U
/*
 * Send the current time in the Random fields of the ClientHello and
 * ServerHello records for compatibility with hypothetical implementations
 * that require it.
 */
#define SSL_MODE_SEND_CLIENTHELLO_TIME 0x00000020U
#define SSL_MODE_SEND_SERVERHELLO_TIME 0x00000040U
/*
 * Send TLS_FALLBACK_SCSV in the ClientHello. To be set only by applications
 * that reconnect with a downgraded protocol version; see
 * draft-ietf-tls-downgrade-scsv-00 for details. DO NOT ENABLE THIS if your
 * application attempts a normal handshake. Only use this in explicit
 * fallback retries, following the guidance in
 * draft-ietf-tls-downgrade-scsv-00.
 */
#define SSL_MODE_SEND_FALLBACK_SCSV 0x00000080U
/*
 * Support Asynchronous operation
 */
#define SSL_MODE_ASYNC 0x00000100U

/*
 * When using DTLS/SCTP, include the terminating zero in the label
 * used for computing the endpoint-pair shared secret. Required for
 * interoperability with implementations having this bug like these
 * older version of OpenSSL:
 * - OpenSSL 1.0.0 series
 * - OpenSSL 1.0.1 series
 * - OpenSSL 1.0.2 series
 * - OpenSSL 1.1.0 series
 * - OpenSSL 1.1.1 and 1.1.1a
 */
#define SSL_MODE_DTLS_SCTP_LABEL_LENGTH_BUG 0x00000400U

/* Cert related flags */
/*
 * Many implementations ignore some aspects of the TLS standards such as
 * enforcing certificate chain algorithms. When this is set we enforce them.
 */
#define SSL_CERT_FLAG_TLS_STRICT 0x00000001U

/* Suite B modes, takes same values as certificate verify flags */
#define SSL_CERT_FLAG_SUITEB_128_LOS_ONLY 0x10000
/* Suite B 192 bit only mode */
#define SSL_CERT_FLAG_SUITEB_192_LOS 0x20000
/* Suite B 128 bit mode allowing 192 bit algorithms */
#define SSL_CERT_FLAG_SUITEB_128_LOS 0x30000

/* Perform all sorts of protocol violations for testing purposes */
#define SSL_CERT_FLAG_BROKEN_PROTOCOL 0x10000000

/* Flags for building certificate chains */
/* Treat any existing certificates as untrusted CAs */
#define SSL_BUILD_CHAIN_FLAG_UNTRUSTED 0x1
/* Don't include root CA in chain */
#define SSL_BUILD_CHAIN_FLAG_NO_ROOT 0x2
/* Just check certificates already there */
#define SSL_BUILD_CHAIN_FLAG_CHECK 0x4
/* Ignore verification errors */
#define SSL_BUILD_CHAIN_FLAG_IGNORE_ERROR 0x8
/* Clear verification errors from queue */
#define SSL_BUILD_CHAIN_FLAG_CLEAR_ERROR 0x10

/* Flags returned by SSL_check_chain */
/* Certificate can be used with this session */
#define CERT_PKEY_VALID 0x1
/* Certificate can also be used for signing */
#define CERT_PKEY_SIGN 0x2
/* EE certificate signing algorithm OK */
#define CERT_PKEY_EE_SIGNATURE 0x10
/* CA signature algorithms OK */
#define CERT_PKEY_CA_SIGNATURE 0x20
/* EE certificate parameters OK */
#define CERT_PKEY_EE_PARAM 0x40
/* CA certificate parameters OK */
#define CERT_PKEY_CA_PARAM 0x80
/* Signing explicitly allowed as opposed to SHA1 fallback */
#define CERT_PKEY_EXPLICIT_SIGN 0x100
/* Client CA issuer names match (always set for server cert) */
#define CERT_PKEY_ISSUER_NAME 0x200
/* Cert type matches client types (always set for server cert) */
#define CERT_PKEY_CERT_TYPE 0x400
/* Cert chain suitable to Suite B */
#define CERT_PKEY_SUITEB 0x800

#define SSL_CONF_FLAG_CMDLINE 0x1
#define SSL_CONF_FLAG_FILE 0x2
#define SSL_CONF_FLAG_CLIENT 0x4
#define SSL_CONF_FLAG_SERVER 0x8
#define SSL_CONF_FLAG_SHOW_ERRORS 0x10
#define SSL_CONF_FLAG_CERTIFICATE 0x20
#define SSL_CONF_FLAG_REQUIRE_PRIVATE 0x40
/* Configuration value types */
#define SSL_CONF_TYPE_UNKNOWN 0x0
#define SSL_CONF_TYPE_STRING 0x1
#define SSL_CONF_TYPE_FILE 0x2
#define SSL_CONF_TYPE_DIR 0x3
#define SSL_CONF_TYPE_NONE 0x4
#define SSL_CONF_TYPE_STORE 0x5

/* Maximum length of the application-controlled segment of a a TLSv1.3 cookie */
#define SSL_COOKIE_LENGTH 4096

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

    uint64_t SSL_CTX_get_options(const SSL_CTX* ctx);
    uint64_t SSL_get_options(const SSL* s);
    uint64_t SSL_CTX_clear_options(SSL_CTX* ctx, uint64_t op);
    uint64_t SSL_clear_options(SSL* s, uint64_t op);
    uint64_t SSL_CTX_set_options(SSL_CTX* ctx, uint64_t op);
    uint64_t SSL_set_options(SSL* s, uint64_t op);

#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 DTLS_set_link_mtu(ssl, mtu) \
    SSL_ctrl((ssl), DTLS_CTRL_SET_LINK_MTU, (mtu), NULL)
#define DTLS_get_link_min_mtu(ssl) \
    SSL_ctrl((ssl), DTLS_CTRL_GET_LINK_MIN_MTU, 0, NULL)

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

#define SSL_CTX_set_cert_flags(ctx, op) \
    SSL_CTX_ctrl((ctx), SSL_CTRL_CERT_FLAGS, (op), NULL)
#define SSL_set_cert_flags(s, op) \
    SSL_ctrl((s), SSL_CTRL_CERT_FLAGS, (op), NULL)
#define SSL_CTX_clear_cert_flags(ctx, op) \
    SSL_CTX_ctrl((ctx), SSL_CTRL_CLEAR_CERT_FLAGS, (op), NULL)
#define SSL_clear_cert_flags(s, op) \
    SSL_ctrl((s), SSL_CTRL_CLEAR_CERT_FLAGS, (op), 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))

#define SSL_get_extms_support(s) \
    SSL_ctrl((s), SSL_CTRL_GET_EXTMS_SUPPORT, 0, NULL)

#ifndef OPENSSL_NO_SRP
/* see tls_srp.c */
#ifndef OPENSSL_NO_DEPRECATED_3_0
    OSSL_DEPRECATEDIN_3_0 __owur int SSL_SRP_CTX_init(SSL* s);
    OSSL_DEPRECATEDIN_3_0 __owur int SSL_CTX_SRP_CTX_init(SSL_CTX* ctx);
    OSSL_DEPRECATEDIN_3_0 int SSL_SRP_CTX_free(SSL* ctx);
    OSSL_DEPRECATEDIN_3_0 int SSL_CTX_SRP_CTX_free(SSL_CTX* ctx);
    OSSL_DEPRECATEDIN_3_0 __owur int SSL_srp_server_param_with_username(SSL* s, int* ad);
    OSSL_DEPRECATEDIN_3_0 __owur int SRP_Calc_A_param(SSL* s);
#endif
#endif

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

#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 SSLv3/TLSv1 it is 32
     * bytes. The callback can alter this length to be less if desired. It is
     * also an error for the callback to set the size to zero.
     */
    typedef int (*GEN_SESSION_CB)(SSL* ssl, unsigned char* id, unsigned int* id_len);

#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)
#define SSL_SESS_CACHE_UPDATE_TIME 0x0400

    LHASH_OF(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);
#ifndef OPENSSL_NO_ENGINE
    __owur int SSL_CTX_set_client_cert_engine(SSL_CTX* ctx, ENGINE* e);
#endif
    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_stateless_cookie_generate_cb(
        SSL_CTX* ctx,
        int (*gen_stateless_cookie_cb)(SSL* ssl, unsigned char* cookie, size_t* cookie_len)
    );
    void SSL_CTX_set_stateless_cookie_verify_cb(
        SSL_CTX* ctx,
        int (*verify_stateless_cookie_cb)(SSL* ssl, const unsigned char* cookie, size_t cookie_len)
    );
#ifndef OPENSSL_NO_NEXTPROTONEG

    typedef int (*SSL_CTX_npn_advertised_cb_func)(SSL* ssl, const unsigned char** out, unsigned int* outlen, void* arg);
    void SSL_CTX_set_next_protos_advertised_cb(SSL_CTX* s, SSL_CTX_npn_advertised_cb_func cb, void* arg);
#define SSL_CTX_set_npn_advertised_cb SSL_CTX_set_next_protos_advertised_cb

    typedef int (*SSL_CTX_npn_select_cb_func)(SSL* s, unsigned char** out, unsigned char* outlen, const unsigned char* in, unsigned int inlen, void* arg);
    void SSL_CTX_set_next_proto_select_cb(SSL_CTX* s, SSL_CTX_npn_select_cb_func cb, void* arg);
#define SSL_CTX_set_npn_select_cb SSL_CTX_set_next_proto_select_cb

    void SSL_get0_next_proto_negotiated(const SSL* s, const unsigned char** data, unsigned* len);
#define SSL_get0_npn_negotiated SSL_get0_next_proto_negotiated
#endif

    __owur 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);

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

    __owur int SSL_CTX_set_alpn_protos(SSL_CTX* ctx, const unsigned char* protos, unsigned int protos_len);
    __owur int SSL_set_alpn_protos(SSL* ssl, const unsigned char* protos, unsigned int protos_len);
    typedef int (*SSL_CTX_alpn_select_cb_func)(SSL* ssl, const unsigned char** out, unsigned char* outlen, const unsigned char* in, unsigned int inlen, void* arg);
    void SSL_CTX_set_alpn_select_cb(SSL_CTX* ctx, SSL_CTX_alpn_select_cb_func cb, void* arg);
    void SSL_get0_alpn_selected(const SSL* ssl, const unsigned char** data, unsigned int* len);

#ifndef OPENSSL_NO_PSK
/*
 * the maximum length of the buffer given to callbacks containing the
 * resulting identity/psk
 */
#define PSK_MAX_IDENTITY_LEN 256
#define PSK_MAX_PSK_LEN 512
    typedef unsigned int (*SSL_psk_client_cb_func)(SSL* ssl, const char* hint, char* identity, unsigned int max_identity_len, unsigned char* psk, unsigned int max_psk_len);
    void SSL_CTX_set_psk_client_callback(SSL_CTX* ctx, SSL_psk_client_cb_func cb);
    void SSL_set_psk_client_callback(SSL* ssl, SSL_psk_client_cb_func cb);

    typedef unsigned int (*SSL_psk_server_cb_func)(SSL* ssl, const char* identity, unsigned char* psk, unsigned int max_psk_len);
    void SSL_CTX_set_psk_server_callback(SSL_CTX* ctx, SSL_psk_server_cb_func cb);
    void SSL_set_psk_server_callback(SSL* ssl, SSL_psk_server_cb_func cb);

    __owur int SSL_CTX_use_psk_identity_hint(SSL_CTX* ctx, const char* identity_hint);
    __owur int SSL_use_psk_identity_hint(SSL* s, const char* identity_hint);
    const char* SSL_get_psk_identity_hint(const SSL* s);
    const char* SSL_get_psk_identity(const SSL* s);
#endif

    typedef int (*SSL_psk_find_session_cb_func)(SSL* ssl, const unsigned char* identity, size_t identity_len, SSL_SESSION** sess);
    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_find_session_callback(SSL* s, SSL_psk_find_session_cb_func cb);
    void SSL_CTX_set_psk_find_session_callback(SSL_CTX* ctx, SSL_psk_find_session_cb_func cb);
    void SSL_set_psk_use_session_callback(SSL* s, SSL_psk_use_session_cb_func cb);
    void SSL_CTX_set_psk_use_session_callback(SSL_CTX* ctx, SSL_psk_use_session_cb_func cb);

    /* Register callbacks to handle custom TLS Extensions for client or server. */

    __owur int SSL_CTX_has_client_custom_ext(const SSL_CTX* ctx, unsigned int ext_type);

    __owur int SSL_CTX_add_client_custom_ext(SSL_CTX* ctx, unsigned int ext_type, custom_ext_add_cb add_cb, custom_ext_free_cb free_cb, void* add_arg, custom_ext_parse_cb parse_cb, void* parse_arg);

    __owur int SSL_CTX_add_server_custom_ext(SSL_CTX* ctx, unsigned int ext_type, custom_ext_add_cb add_cb, custom_ext_free_cb free_cb, void* add_arg, custom_ext_parse_cb parse_cb, void* parse_arg);

    __owur int SSL_CTX_add_custom_ext(SSL_CTX* ctx, unsigned int ext_type, unsigned int context, SSL_custom_ext_add_cb_ex add_cb, SSL_custom_ext_free_cb_ex free_cb, void* add_arg, SSL_custom_ext_parse_cb_ex parse_cb, void* parse_arg);

    __owur int SSL_extension_supported(unsigned int ext_type);

#define SSL_NOTHING 1
#define SSL_WRITING 2
#define SSL_READING 3
#define SSL_X509_LOOKUP 4
#define SSL_ASYNC_PAUSED 5
#define SSL_ASYNC_NO_JOBS 6
#define SSL_CLIENT_HELLO_CB 7
#define SSL_RETRY_VERIFY 8

/* 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_want_retry_verify(s) (SSL_want(s) == SSL_RETRY_VERIFY)
#define SSL_want_async(s) (SSL_want(s) == SSL_ASYNC_PAUSED)
#define SSL_want_async_job(s) (SSL_want(s) == SSL_ASYNC_NO_JOBS)
#define SSL_want_client_hello_cb(s) (SSL_want(s) == SSL_CLIENT_HELLO_CB)

#define SSL_MAC_FLAG_READ_MAC_STREAM 1
#define SSL_MAC_FLAG_WRITE_MAC_STREAM 2
#define SSL_MAC_FLAG_READ_MAC_TLSTREE 4
#define SSL_MAC_FLAG_WRITE_MAC_TLSTREE 8

    /*
     * A callback for logging out TLS key material. This callback should log out
     * |line| followed by a newline.
     */
    typedef void (*SSL_CTX_keylog_cb_func)(const SSL* ssl, const char* line);

    /*
     * SSL_CTX_set_keylog_callback configures a callback to log key material. This
     * is intended for debugging use with tools like Wireshark. The cb function
     * should log line followed by a newline.
     */
    void SSL_CTX_set_keylog_callback(SSL_CTX* ctx, SSL_CTX_keylog_cb_func cb);

    /*
     * SSL_CTX_get_keylog_callback returns the callback configured by
     * SSL_CTX_set_keylog_callback.
     */
    SSL_CTX_keylog_cb_func SSL_CTX_get_keylog_callback(const SSL_CTX* ctx);

    int SSL_CTX_set_max_early_data(SSL_CTX* ctx, uint32_t max_early_data);
    uint32_t SSL_CTX_get_max_early_data(const SSL_CTX* ctx);
    int SSL_set_max_early_data(SSL* s, uint32_t max_early_data);
    uint32_t SSL_get_max_early_data(const SSL* s);
    int SSL_CTX_set_recv_max_early_data(SSL_CTX* ctx, uint32_t recv_max_early_data);
    uint32_t SSL_CTX_get_recv_max_early_data(const SSL_CTX* ctx);
    int SSL_set_recv_max_early_data(SSL* s, uint32_t recv_max_early_data);
    uint32_t SSL_get_recv_max_early_data(const SSL* s);

#ifdef __cplusplus
}
#endif

#include <openssl/ssl2.h>
#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

    /*
     * These need to be after the above set of includes due to a compiler bug
     * in VisualStudio 2015
     */
    SKM_DEFINE_STACK_OF_INTERNAL(SSL_CIPHER, const SSL_CIPHER, SSL_CIPHER)
#define sk_SSL_CIPHER_num(sk) OPENSSL_sk_num(ossl_check_const_SSL_CIPHER_sk_type(sk))
#define sk_SSL_CIPHER_value(sk, idx) ((const SSL_CIPHER*)OPENSSL_sk_value(ossl_check_const_SSL_CIPHER_sk_type(sk), (idx)))
#define sk_SSL_CIPHER_new(cmp) ((STACK_OF(SSL_CIPHER)*)OPENSSL_sk_new(ossl_check_SSL_CIPHER_compfunc_type(cmp)))
#define sk_SSL_CIPHER_new_null() ((STACK_OF(SSL_CIPHER)*)OPENSSL_sk_new_null())
#define sk_SSL_CIPHER_new_reserve(cmp, n) ((STACK_OF(SSL_CIPHER)*)OPENSSL_sk_new_reserve(ossl_check_SSL_CIPHER_compfunc_type(cmp), (n)))
#define sk_SSL_CIPHER_reserve(sk, n) OPENSSL_sk_reserve(ossl_check_SSL_CIPHER_sk_type(sk), (n))
#define sk_SSL_CIPHER_free(sk) OPENSSL_sk_free(ossl_check_SSL_CIPHER_sk_type(sk))
#define sk_SSL_CIPHER_zero(sk) OPENSSL_sk_zero(ossl_check_SSL_CIPHER_sk_type(sk))
#define sk_SSL_CIPHER_delete(sk, i) ((const SSL_CIPHER*)OPENSSL_sk_delete(ossl_check_SSL_CIPHER_sk_type(sk), (i)))
#define sk_SSL_CIPHER_delete_ptr(sk, ptr) ((const SSL_CIPHER*)OPENSSL_sk_delete_ptr(ossl_check_SSL_CIPHER_sk_type(sk), ossl_check_SSL_CIPHER_type(ptr)))
#define sk_SSL_CIPHER_push(sk, ptr) OPENSSL_sk_push(ossl_check_SSL_CIPHER_sk_type(sk), ossl_check_SSL_CIPHER_type(ptr))
#define sk_SSL_CIPHER_unshift(sk, ptr) OPENSSL_sk_unshift(ossl_check_SSL_CIPHER_sk_type(sk), ossl_check_SSL_CIPHER_type(ptr))
#define sk_SSL_CIPHER_pop(sk) ((const SSL_CIPHER*)OPENSSL_sk_pop(ossl_check_SSL_CIPHER_sk_type(sk)))
#define sk_SSL_CIPHER_shift(sk) ((const SSL_CIPHER*)OPENSSL_sk_shift(ossl_check_SSL_CIPHER_sk_type(sk)))
#define sk_SSL_CIPHER_pop_free(sk, freefunc) OPENSSL_sk_pop_free(ossl_check_SSL_CIPHER_sk_type(sk), ossl_check_SSL_CIPHER_freefunc_type(freefunc))
#define sk_SSL_CIPHER_insert(sk, ptr, idx) OPENSSL_sk_insert(ossl_check_SSL_CIPHER_sk_type(sk), ossl_check_SSL_CIPHER_type(ptr), (idx))
#define sk_SSL_CIPHER_set(sk, idx, ptr) ((const SSL_CIPHER*)OPENSSL_sk_set(ossl_check_SSL_CIPHER_sk_type(sk), (idx), ossl_check_SSL_CIPHER_type(ptr)))
#define sk_SSL_CIPHER_find(sk, ptr) OPENSSL_sk_find(ossl_check_SSL_CIPHER_sk_type(sk), ossl_check_SSL_CIPHER_type(ptr))
#define sk_SSL_CIPHER_find_ex(sk, ptr) OPENSSL_sk_find_ex(ossl_check_SSL_CIPHER_sk_type(sk), ossl_check_SSL_CIPHER_type(ptr))
#define sk_SSL_CIPHER_find_all(sk, ptr, pnum) OPENSSL_sk_find_all(ossl_check_SSL_CIPHER_sk_type(sk), ossl_check_SSL_CIPHER_type(ptr), pnum)
#define sk_SSL_CIPHER_sort(sk) OPENSSL_sk_sort(ossl_check_SSL_CIPHER_sk_type(sk))
#define sk_SSL_CIPHER_is_sorted(sk) OPENSSL_sk_is_sorted(ossl_check_const_SSL_CIPHER_sk_type(sk))
#define sk_SSL_CIPHER_dup(sk) ((STACK_OF(SSL_CIPHER)*)OPENSSL_sk_dup(ossl_check_const_SSL_CIPHER_sk_type(sk)))
#define sk_SSL_CIPHER_deep_copy(sk, copyfunc, freefunc) ((STACK_OF(SSL_CIPHER)*)OPENSSL_sk_deep_copy(ossl_check_const_SSL_CIPHER_sk_type(sk), ossl_check_SSL_CIPHER_copyfunc_type(copyfunc), ossl_check_SSL_CIPHER_freefunc_type(freefunc)))
#define sk_SSL_CIPHER_set_cmp_func(sk, cmp) ((sk_SSL_CIPHER_compfunc)OPENSSL_sk_set_cmp_func(ossl_check_SSL_CIPHER_sk_type(sk), ossl_check_SSL_CIPHER_compfunc_type(cmp)))
    SKM_DEFINE_STACK_OF_INTERNAL(SSL_COMP, SSL_COMP, SSL_COMP)
#define sk_SSL_COMP_num(sk) OPENSSL_sk_num(ossl_check_const_SSL_COMP_sk_type(sk))
#define sk_SSL_COMP_value(sk, idx) ((SSL_COMP*)OPENSSL_sk_value(ossl_check_const_SSL_COMP_sk_type(sk), (idx)))
#define sk_SSL_COMP_new(cmp) ((STACK_OF(SSL_COMP)*)OPENSSL_sk_new(ossl_check_SSL_COMP_compfunc_type(cmp)))
#define sk_SSL_COMP_new_null() ((STACK_OF(SSL_COMP)*)OPENSSL_sk_new_null())
#define sk_SSL_COMP_new_reserve(cmp, n) ((STACK_OF(SSL_COMP)*)OPENSSL_sk_new_reserve(ossl_check_SSL_COMP_compfunc_type(cmp), (n)))
#define sk_SSL_COMP_reserve(sk, n) OPENSSL_sk_reserve(ossl_check_SSL_COMP_sk_type(sk), (n))
#define sk_SSL_COMP_free(sk) OPENSSL_sk_free(ossl_check_SSL_COMP_sk_type(sk))
#define sk_SSL_COMP_zero(sk) OPENSSL_sk_zero(ossl_check_SSL_COMP_sk_type(sk))
#define sk_SSL_COMP_delete(sk, i) ((SSL_COMP*)OPENSSL_sk_delete(ossl_check_SSL_COMP_sk_type(sk), (i)))
#define sk_SSL_COMP_delete_ptr(sk, ptr) ((SSL_COMP*)OPENSSL_sk_delete_ptr(ossl_check_SSL_COMP_sk_type(sk), ossl_check_SSL_COMP_type(ptr)))
#define sk_SSL_COMP_push(sk, ptr) OPENSSL_sk_push(ossl_check_SSL_COMP_sk_type(sk), ossl_check_SSL_COMP_type(ptr))
#define sk_SSL_COMP_unshift(sk, ptr) OPENSSL_sk_unshift(ossl_check_SSL_COMP_sk_type(sk), ossl_check_SSL_COMP_type(ptr))
#define sk_SSL_COMP_pop(sk) ((SSL_COMP*)OPENSSL_sk_pop(ossl_check_SSL_COMP_sk_type(sk)))
#define sk_SSL_COMP_shift(sk) ((SSL_COMP*)OPENSSL_sk_shift(ossl_check_SSL_COMP_sk_type(sk)))
#define sk_SSL_COMP_pop_free(sk, freefunc) OPENSSL_sk_pop_free(ossl_check_SSL_COMP_sk_type(sk), ossl_check_SSL_COMP_freefunc_type(freefunc))
#define sk_SSL_COMP_insert(sk, ptr, idx) OPENSSL_sk_insert(ossl_check_SSL_COMP_sk_type(sk), ossl_check_SSL_COMP_type(ptr), (idx))
#define sk_SSL_COMP_set(sk, idx, ptr) ((SSL_COMP*)OPENSSL_sk_set(ossl_check_SSL_COMP_sk_type(sk), (idx), ossl_check_SSL_COMP_type(ptr)))
#define sk_SSL_COMP_find(sk, ptr) OPENSSL_sk_find(ossl_check_SSL_COMP_sk_type(sk), ossl_check_SSL_COMP_type(ptr))
#define sk_SSL_COMP_find_ex(sk, ptr) OPENSSL_sk_find_ex(ossl_check_SSL_COMP_sk_type(sk), ossl_check_SSL_COMP_type(ptr))
#define sk_SSL_COMP_find_all(sk, ptr, pnum) OPENSSL_sk_find_all(ossl_check_SSL_COMP_sk_type(sk), ossl_check_SSL_COMP_type(ptr), pnum)
#define sk_SSL_COMP_sort(sk) OPENSSL_sk_sort(ossl_check_SSL_COMP_sk_type(sk))
#define sk_SSL_COMP_is_sorted(sk) OPENSSL_sk_is_sorted(ossl_check_const_SSL_COMP_sk_type(sk))
#define sk_SSL_COMP_dup(sk) ((STACK_OF(SSL_COMP)*)OPENSSL_sk_dup(ossl_check_const_SSL_COMP_sk_type(sk)))
#define sk_SSL_COMP_deep_copy(sk, copyfunc, freefunc) ((STACK_OF(SSL_COMP)*)OPENSSL_sk_deep_copy(ossl_check_const_SSL_COMP_sk_type(sk), ossl_check_SSL_COMP_copyfunc_type(copyfunc), ossl_check_SSL_COMP_freefunc_type(freefunc)))
#define sk_SSL_COMP_set_cmp_func(sk, cmp) ((sk_SSL_COMP_compfunc)OPENSSL_sk_set_cmp_func(ossl_check_SSL_COMP_sk_type(sk), ossl_check_SSL_COMP_compfunc_type(cmp)))

/* 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)))
#ifndef OPENSSL_NO_DEPRECATED_1_1_0
    OSSL_DEPRECATEDIN_1_1_0 void SSL_set_debug(SSL* s, int debug);
#endif

/* TLSv1.3 KeyUpdate message types */
/* -1 used so that this is an invalid value for the on-the-wire protocol */
#define SSL_KEY_UPDATE_NONE -1
/* Values as defined for the on-the-wire protocol */
#define SSL_KEY_UPDATE_NOT_REQUESTED 0
#define SSL_KEY_UPDATE_REQUESTED 1

    /*
     * The valid handshake states (one for each type message sent and one for each
     * type of message received). There are also two "special" states:
     * TLS = TLS or DTLS state
     * DTLS = DTLS specific state
     * CR/SR = Client Read/Server Read
     * CW/SW = Client Write/Server Write
     *
     * The "special" states are:
     * TLS_ST_BEFORE = No handshake has been initiated yet
     * TLS_ST_OK = A handshake has been successfully completed
     */
    typedef enum
    {
        TLS_ST_BEFORE,
        TLS_ST_OK,
        DTLS_ST_CR_HELLO_VERIFY_REQUEST,
        TLS_ST_CR_SRVR_HELLO,
        TLS_ST_CR_CERT,
        TLS_ST_CR_CERT_STATUS,
        TLS_ST_CR_KEY_EXCH,
        TLS_ST_CR_CERT_REQ,
        TLS_ST_CR_SRVR_DONE,
        TLS_ST_CR_SESSION_TICKET,
        TLS_ST_CR_CHANGE,
        TLS_ST_CR_FINISHED,
        TLS_ST_CW_CLNT_HELLO,
        TLS_ST_CW_CERT,
        TLS_ST_CW_KEY_EXCH,
        TLS_ST_CW_CERT_VRFY,
        TLS_ST_CW_CHANGE,
        TLS_ST_CW_NEXT_PROTO,
        TLS_ST_CW_FINISHED,
        TLS_ST_SW_HELLO_REQ,
        TLS_ST_SR_CLNT_HELLO,
        DTLS_ST_SW_HELLO_VERIFY_REQUEST,
        TLS_ST_SW_SRVR_HELLO,
        TLS_ST_SW_CERT,
        TLS_ST_SW_KEY_EXCH,
        TLS_ST_SW_CERT_REQ,
        TLS_ST_SW_SRVR_DONE,
        TLS_ST_SR_CERT,
        TLS_ST_SR_KEY_EXCH,
        TLS_ST_SR_CERT_VRFY,
        TLS_ST_SR_NEXT_PROTO,
        TLS_ST_SR_CHANGE,
        TLS_ST_SR_FINISHED,
        TLS_ST_SW_SESSION_TICKET,
        TLS_ST_SW_CERT_STATUS,
        TLS_ST_SW_CHANGE,
        TLS_ST_SW_FINISHED,
        TLS_ST_SW_ENCRYPTED_EXTENSIONS,
        TLS_ST_CR_ENCRYPTED_EXTENSIONS,
        TLS_ST_CR_CERT_VRFY,
        TLS_ST_SW_CERT_VRFY,
        TLS_ST_CR_HELLO_REQ,
        TLS_ST_SW_KEY_UPDATE,
        TLS_ST_CW_KEY_UPDATE,
        TLS_ST_SR_KEY_UPDATE,
        TLS_ST_CR_KEY_UPDATE,
        TLS_ST_EARLY_DATA,
        TLS_ST_PENDING_EARLY_DATA_END,
        TLS_ST_CW_END_OF_EARLY_DATA,
        TLS_ST_SR_END_OF_EARLY_DATA
    } OSSL_HANDSHAKE_STATE;

    /*
     * Most of the following state values are no longer used and are defined to be
     * the closest equivalent value in the current state machine code. Not all
     * defines have an equivalent and are set to a dummy value (-1). SSL_ST_CONNECT
     * and SSL_ST_ACCEPT are still in use in the definition of SSL_CB_ACCEPT_LOOP,
     * SSL_CB_ACCEPT_EXIT, SSL_CB_CONNECT_LOOP and SSL_CB_CONNECT_EXIT.
     */

#define SSL_ST_CONNECT 0x1000
#define SSL_ST_ACCEPT 0x2000

#define SSL_ST_MASK 0x0FFF

#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_in_connect_init(a) (SSL_in_init(a) && !SSL_is_server(a))
#define SSL_in_accept_init(a) (SSL_in_init(a) && SSL_is_server(a))
    int SSL_in_init(const SSL* s);
    int SSL_in_before(const SSL* s);
    int SSL_is_init_finished(const SSL* s);

/*
 * The following 3 states are kept in ssl->rlayer.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 3 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
#define SSL_VERIFY_POST_HANDSHAKE 0x08

#ifndef OPENSSL_NO_DEPRECATED_1_1_0
#define OpenSSL_add_ssl_algorithms() SSL_library_init()
#define SSLeay_add_ssl_algorithms() SSL_library_init()
#endif

/* 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)

    DECLARE_PEM_rw(SSL_SESSION, SSL_SESSION)
#define SSL_AD_REASON_OFFSET 1000 /* offset to get SSL_R_... value \
                                   * from SSL_AD_... */
/* These alert types are for SSLv3 and TLSv1 */
#define SSL_AD_CLOSE_NOTIFY SSL3_AD_CLOSE_NOTIFY
/* fatal */
#define SSL_AD_UNEXPECTED_MESSAGE SSL3_AD_UNEXPECTED_MESSAGE
/* fatal */
#define SSL_AD_BAD_RECORD_MAC SSL3_AD_BAD_RECORD_MAC
#define SSL_AD_DECRYPTION_FAILED TLS1_AD_DECRYPTION_FAILED
#define SSL_AD_RECORD_OVERFLOW TLS1_AD_RECORD_OVERFLOW
/* fatal */
#define SSL_AD_DECOMPRESSION_FAILURE SSL3_AD_DECOMPRESSION_FAILURE
/* fatal */
#define SSL_AD_HANDSHAKE_FAILURE SSL3_AD_HANDSHAKE_FAILURE
/* Not for TLS */
#define SSL_AD_NO_CERTIFICATE SSL3_AD_NO_CERTIFICATE
#define SSL_AD_BAD_CERTIFICATE SSL3_AD_BAD_CERTIFICATE
#define SSL_AD_UNSUPPORTED_CERTIFICATE SSL3_AD_UNSUPPORTED_CERTIFICATE
#define SSL_AD_CERTIFICATE_REVOKED SSL3_AD_CERTIFICATE_REVOKED
#define SSL_AD_CERTIFICATE_EXPIRED SSL3_AD_CERTIFICATE_EXPIRED
#define SSL_AD_CERTIFICATE_UNKNOWN SSL3_AD_CERTIFICATE_UNKNOWN
/* fatal */
#define SSL_AD_ILLEGAL_PARAMETER SSL3_AD_ILLEGAL_PARAMETER
/* fatal */
#define SSL_AD_UNKNOWN_CA TLS1_AD_UNKNOWN_CA
/* fatal */
#define SSL_AD_ACCESS_DENIED TLS1_AD_ACCESS_DENIED
/* fatal */
#define SSL_AD_DECODE_ERROR TLS1_AD_DECODE_ERROR
#define SSL_AD_DECRYPT_ERROR TLS1_AD_DECRYPT_ERROR
/* fatal */
#define SSL_AD_EXPORT_RESTRICTION TLS1_AD_EXPORT_RESTRICTION
/* fatal */
#define SSL_AD_PROTOCOL_VERSION TLS1_AD_PROTOCOL_VERSION
/* fatal */
#define SSL_AD_INSUFFICIENT_SECURITY TLS1_AD_INSUFFICIENT_SECURITY
/* fatal */
#define SSL_AD_INTERNAL_ERROR TLS1_AD_INTERNAL_ERROR
#define SSL_AD_USER_CANCELLED TLS1_AD_USER_CANCELLED
#define SSL_AD_NO_RENEGOTIATION TLS1_AD_NO_RENEGOTIATION
#define SSL_AD_MISSING_EXTENSION TLS13_AD_MISSING_EXTENSION
#define SSL_AD_CERTIFICATE_REQUIRED TLS13_AD_CERTIFICATE_REQUIRED
#define SSL_AD_UNSUPPORTED_EXTENSION TLS1_AD_UNSUPPORTED_EXTENSION
#define SSL_AD_CERTIFICATE_UNOBTAINABLE TLS1_AD_CERTIFICATE_UNOBTAINABLE
#define SSL_AD_UNRECOGNIZED_NAME TLS1_AD_UNRECOGNIZED_NAME
#define SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE TLS1_AD_BAD_CERTIFICATE_STATUS_RESPONSE
#define SSL_AD_BAD_CERTIFICATE_HASH_VALUE TLS1_AD_BAD_CERTIFICATE_HASH_VALUE
/* fatal */
#define SSL_AD_UNKNOWN_PSK_IDENTITY TLS1_AD_UNKNOWN_PSK_IDENTITY
/* fatal */
#define SSL_AD_INAPPROPRIATE_FALLBACK TLS1_AD_INAPPROPRIATE_FALLBACK
#define SSL_AD_NO_APPLICATION_PROTOCOL TLS1_AD_NO_APPLICATION_PROTOCOL
#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 /* look at error stack/return \
                             * value/errno */
#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_ERROR_WANT_RETRY_VERIFY 12

#ifndef OPENSSL_NO_DEPRECATED_3_0
#define SSL_CTRL_SET_TMP_DH 3
#define SSL_CTRL_SET_TMP_ECDH 4
#define SSL_CTRL_SET_TMP_DH_CB 6
#endif

#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_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_SET_TLSEXT_OPAQUE_PRF_INPUT    60 */
/*# define SSL_CTRL_SET_TLSEXT_OPAQUE_PRF_INPUT_CB 61 */
/*# define SSL_CTRL_SET_TLSEXT_OPAQUE_PRF_INPUT_CB_ARG 62 */
#define SSL_CTRL_SET_TLSEXT_STATUS_REQ_CB 63
#define SSL_CTRL_SET_TLSEXT_STATUS_REQ_CB_ARG 64
#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
#ifndef OPENSSL_NO_DEPRECATED_3_0
#define SSL_CTRL_SET_TLSEXT_TICKET_KEY_CB 72
#endif
#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 SSL_CTRL_GET_RI_SUPPORT 76
#define SSL_CTRL_CLEAR_MODE 78
#define SSL_CTRL_SET_NOT_RESUMABLE_SESS_CB 79
#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_GET_GROUPS 90
#define SSL_CTRL_SET_GROUPS 91
#define SSL_CTRL_SET_GROUPS_LIST 92
#define SSL_CTRL_GET_SHARED_GROUP 93
#define SSL_CTRL_SET_SIGALGS 97
#define SSL_CTRL_SET_SIGALGS_LIST 98
#define SSL_CTRL_CERT_FLAGS 99
#define SSL_CTRL_CLEAR_CERT_FLAGS 100
#define SSL_CTRL_SET_CLIENT_SIGALGS 101
#define SSL_CTRL_SET_CLIENT_SIGALGS_LIST 102
#define SSL_CTRL_GET_CLIENT_CERT_TYPES 103
#define SSL_CTRL_SET_CLIENT_CERT_TYPES 104
#define SSL_CTRL_BUILD_CERT_CHAIN 105
#define SSL_CTRL_SET_VERIFY_CERT_STORE 106
#define SSL_CTRL_SET_CHAIN_CERT_STORE 107
#define SSL_CTRL_GET_PEER_SIGNATURE_NID 108
#define SSL_CTRL_GET_PEER_TMP_KEY 109
#define SSL_CTRL_GET_RAW_CIPHERLIST 110
#define SSL_CTRL_GET_EC_POINT_FORMATS 111
#define SSL_CTRL_GET_CHAIN_CERTS 115
#define SSL_CTRL_SELECT_CURRENT_CERT 116
#define SSL_CTRL_SET_CURRENT_CERT 117
#define SSL_CTRL_SET_DH_AUTO 118
#define DTLS_CTRL_SET_LINK_MTU 120
#define DTLS_CTRL_GET_LINK_MIN_MTU 121
#define SSL_CTRL_GET_EXTMS_SUPPORT 122
#define SSL_CTRL_SET_MIN_PROTO_VERSION 123
#define SSL_CTRL_SET_MAX_PROTO_VERSION 124
#define SSL_CTRL_SET_SPLIT_SEND_FRAGMENT 125
#define SSL_CTRL_SET_MAX_PIPELINES 126
#define SSL_CTRL_GET_TLSEXT_STATUS_REQ_TYPE 127
#define SSL_CTRL_GET_TLSEXT_STATUS_REQ_CB 128
#define SSL_CTRL_GET_TLSEXT_STATUS_REQ_CB_ARG 129
#define SSL_CTRL_GET_MIN_PROTO_VERSION 130
#define SSL_CTRL_GET_MAX_PROTO_VERSION 131
#define SSL_CTRL_GET_SIGNATURE_NID 132
#define SSL_CTRL_GET_TMP_KEY 133
#define SSL_CTRL_GET_NEGOTIATED_GROUP 134
#define SSL_CTRL_SET_RETRY_VERIFY 136
#define SSL_CTRL_GET_VERIFY_CERT_STORE 137
#define SSL_CTRL_GET_CHAIN_CERT_STORE 138
#define SSL_CERT_SET_FIRST 1
#define SSL_CERT_SET_NEXT 2
#define SSL_CERT_SET_SERVER 3
#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 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)
#ifndef OPENSSL_NO_DEPRECATED_3_0
#define SSL_CTX_set_tmp_dh(ctx, dh) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_TMP_DH, 0, (char*)(dh))
#endif
#define SSL_CTX_set_dh_auto(ctx, onoff) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_DH_AUTO, onoff, NULL)
#define SSL_set_dh_auto(s, onoff) \
    SSL_ctrl(s, SSL_CTRL_SET_DH_AUTO, onoff, NULL)
#ifndef OPENSSL_NO_DEPRECATED_3_0
#define SSL_set_tmp_dh(ssl, dh) \
    SSL_ctrl(ssl, SSL_CTRL_SET_TMP_DH, 0, (char*)(dh))
#endif
#ifndef OPENSSL_NO_DEPRECATED_3_0
#define SSL_CTX_set_tmp_ecdh(ctx, ecdh) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_TMP_ECDH, 0, (char*)(ecdh))
#define SSL_set_tmp_ecdh(ssl, ecdh) \
    SSL_ctrl(ssl, SSL_CTRL_SET_TMP_ECDH, 0, (char*)(ecdh))
#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_CTX_set0_chain(ctx, sk) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_CHAIN, 0, (char*)(sk))
#define SSL_CTX_set1_chain(ctx, sk) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_CHAIN, 1, (char*)(sk))
#define SSL_CTX_add0_chain_cert(ctx, x509) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_CHAIN_CERT, 0, (char*)(x509))
#define SSL_CTX_add1_chain_cert(ctx, x509) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_CHAIN_CERT, 1, (char*)(x509))
#define SSL_CTX_get0_chain_certs(ctx, px509) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_GET_CHAIN_CERTS, 0, px509)
#define SSL_CTX_clear_chain_certs(ctx) \
    SSL_CTX_set0_chain(ctx, NULL)
#define SSL_CTX_build_cert_chain(ctx, flags) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_BUILD_CERT_CHAIN, flags, NULL)
#define SSL_CTX_select_current_cert(ctx, x509) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SELECT_CURRENT_CERT, 0, (char*)(x509))
#define SSL_CTX_set_current_cert(ctx, op) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_CURRENT_CERT, op, NULL)
#define SSL_CTX_set0_verify_cert_store(ctx, st) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_VERIFY_CERT_STORE, 0, (char*)(st))
#define SSL_CTX_set1_verify_cert_store(ctx, st) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_VERIFY_CERT_STORE, 1, (char*)(st))
#define SSL_CTX_get0_verify_cert_store(ctx, st) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_GET_VERIFY_CERT_STORE, 0, (char*)(st))
#define SSL_CTX_set0_chain_cert_store(ctx, st) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_CHAIN_CERT_STORE, 0, (char*)(st))
#define SSL_CTX_set1_chain_cert_store(ctx, st) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_CHAIN_CERT_STORE, 1, (char*)(st))
#define SSL_CTX_get0_chain_cert_store(ctx, st) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_GET_CHAIN_CERT_STORE, 0, (char*)(st))
#define SSL_set0_chain(s, sk) \
    SSL_ctrl(s, SSL_CTRL_CHAIN, 0, (char*)(sk))
#define SSL_set1_chain(s, sk) \
    SSL_ctrl(s, SSL_CTRL_CHAIN, 1, (char*)(sk))
#define SSL_add0_chain_cert(s, x509) \
    SSL_ctrl(s, SSL_CTRL_CHAIN_CERT, 0, (char*)(x509))
#define SSL_add1_chain_cert(s, x509) \
    SSL_ctrl(s, SSL_CTRL_CHAIN_CERT, 1, (char*)(x509))
#define SSL_get0_chain_certs(s, px509) \
    SSL_ctrl(s, SSL_CTRL_GET_CHAIN_CERTS, 0, px509)
#define SSL_clear_chain_certs(s) \
    SSL_set0_chain(s, NULL)
#define SSL_build_cert_chain(s, flags) \
    SSL_ctrl(s, SSL_CTRL_BUILD_CERT_CHAIN, flags, NULL)
#define SSL_select_current_cert(s, x509) \
    SSL_ctrl(s, SSL_CTRL_SELECT_CURRENT_CERT, 0, (char*)(x509))
#define SSL_set_current_cert(s, op) \
    SSL_ctrl(s, SSL_CTRL_SET_CURRENT_CERT, op, NULL)
#define SSL_set0_verify_cert_store(s, st) \
    SSL_ctrl(s, SSL_CTRL_SET_VERIFY_CERT_STORE, 0, (char*)(st))
#define SSL_set1_verify_cert_store(s, st) \
    SSL_ctrl(s, SSL_CTRL_SET_VERIFY_CERT_STORE, 1, (char*)(st))
#define SSL_get0_verify_cert_store(s, st) \
    SSL_ctrl(s, SSL_CTRL_GET_VERIFY_CERT_STORE, 0, (char*)(st))
#define SSL_set0_chain_cert_store(s, st) \
    SSL_ctrl(s, SSL_CTRL_SET_CHAIN_CERT_STORE, 0, (char*)(st))
#define SSL_set1_chain_cert_store(s, st) \
    SSL_ctrl(s, SSL_CTRL_SET_CHAIN_CERT_STORE, 1, (char*)(st))
#define SSL_get0_chain_cert_store(s, st) \
    SSL_ctrl(s, SSL_CTRL_GET_CHAIN_CERT_STORE, 0, (char*)(st))

#define SSL_get1_groups(s, glist) \
    SSL_ctrl(s, SSL_CTRL_GET_GROUPS, 0, (int*)(glist))
#define SSL_CTX_set1_groups(ctx, glist, glistlen) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_GROUPS, glistlen, (int*)(glist))
#define SSL_CTX_set1_groups_list(ctx, s) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_GROUPS_LIST, 0, (char*)(s))
#define SSL_set1_groups(s, glist, glistlen) \
    SSL_ctrl(s, SSL_CTRL_SET_GROUPS, glistlen, (char*)(glist))
#define SSL_set1_groups_list(s, str) \
    SSL_ctrl(s, SSL_CTRL_SET_GROUPS_LIST, 0, (char*)(str))
#define SSL_get_shared_group(s, n) \
    SSL_ctrl(s, SSL_CTRL_GET_SHARED_GROUP, n, NULL)
#define SSL_get_negotiated_group(s) \
    SSL_ctrl(s, SSL_CTRL_GET_NEGOTIATED_GROUP, 0, NULL)
#define SSL_CTX_set1_sigalgs(ctx, slist, slistlen) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_SIGALGS, slistlen, (int*)(slist))
#define SSL_CTX_set1_sigalgs_list(ctx, s) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_SIGALGS_LIST, 0, (char*)(s))
#define SSL_set1_sigalgs(s, slist, slistlen) \
    SSL_ctrl(s, SSL_CTRL_SET_SIGALGS, slistlen, (int*)(slist))
#define SSL_set1_sigalgs_list(s, str) \
    SSL_ctrl(s, SSL_CTRL_SET_SIGALGS_LIST, 0, (char*)(str))
#define SSL_CTX_set1_client_sigalgs(ctx, slist, slistlen) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_CLIENT_SIGALGS, slistlen, (int*)(slist))
#define SSL_CTX_set1_client_sigalgs_list(ctx, s) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_CLIENT_SIGALGS_LIST, 0, (char*)(s))
#define SSL_set1_client_sigalgs(s, slist, slistlen) \
    SSL_ctrl(s, SSL_CTRL_SET_CLIENT_SIGALGS, slistlen, (int*)(slist))
#define SSL_set1_client_sigalgs_list(s, str) \
    SSL_ctrl(s, SSL_CTRL_SET_CLIENT_SIGALGS_LIST, 0, (char*)(str))
#define SSL_get0_certificate_types(s, clist) \
    SSL_ctrl(s, SSL_CTRL_GET_CLIENT_CERT_TYPES, 0, (char*)(clist))
#define SSL_CTX_set1_client_certificate_types(ctx, clist, clistlen) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_CLIENT_CERT_TYPES, clistlen, (char*)(clist))
#define SSL_set1_client_certificate_types(s, clist, clistlen) \
    SSL_ctrl(s, SSL_CTRL_SET_CLIENT_CERT_TYPES, clistlen, (char*)(clist))
#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)
#define SSL_get_tmp_key(s, pk) \
    SSL_ctrl(s, SSL_CTRL_GET_TMP_KEY, 0, pk)
#define SSL_get0_raw_cipherlist(s, plst) \
    SSL_ctrl(s, SSL_CTRL_GET_RAW_CIPHERLIST, 0, plst)
#define SSL_get0_ec_point_formats(s, plst) \
    SSL_ctrl(s, SSL_CTRL_GET_EC_POINT_FORMATS, 0, plst)
#define SSL_CTX_set_min_proto_version(ctx, version) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_MIN_PROTO_VERSION, version, NULL)
#define SSL_CTX_set_max_proto_version(ctx, version) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_MAX_PROTO_VERSION, version, NULL)
#define SSL_CTX_get_min_proto_version(ctx) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_GET_MIN_PROTO_VERSION, 0, NULL)
#define SSL_CTX_get_max_proto_version(ctx) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_GET_MAX_PROTO_VERSION, 0, NULL)
#define SSL_set_min_proto_version(s, version) \
    SSL_ctrl(s, SSL_CTRL_SET_MIN_PROTO_VERSION, version, NULL)
#define SSL_set_max_proto_version(s, version) \
    SSL_ctrl(s, SSL_CTRL_SET_MAX_PROTO_VERSION, version, NULL)
#define SSL_get_min_proto_version(s) \
    SSL_ctrl(s, SSL_CTRL_GET_MIN_PROTO_VERSION, 0, NULL)
#define SSL_get_max_proto_version(s) \
    SSL_ctrl(s, SSL_CTRL_GET_MAX_PROTO_VERSION, 0, NULL)

        const char* SSL_group_to_name(SSL* s, int id);

/* Backwards compatibility, original 1.1.0 names */
#define SSL_CTRL_GET_SERVER_TMP_KEY \
    SSL_CTRL_GET_PEER_TMP_KEY
#define SSL_get_server_tmp_key(s, pk) \
    SSL_get_peer_tmp_key(s, pk)

    int SSL_set0_tmp_dh_pkey(SSL* s, EVP_PKEY* dhpkey);
    int SSL_CTX_set0_tmp_dh_pkey(SSL_CTX* ctx, EVP_PKEY* dhpkey);

/*
 * The following symbol names are old and obsolete. They are kept
 * for compatibility reasons only and should not be used anymore.
 */
#define SSL_CTRL_GET_CURVES SSL_CTRL_GET_GROUPS
#define SSL_CTRL_SET_CURVES SSL_CTRL_SET_GROUPS
#define SSL_CTRL_SET_CURVES_LIST SSL_CTRL_SET_GROUPS_LIST
#define SSL_CTRL_GET_SHARED_CURVE SSL_CTRL_GET_SHARED_GROUP

#define SSL_get1_curves SSL_get1_groups
#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
#define SSL_get_shared_curve SSL_get_shared_group

#ifndef OPENSSL_NO_DEPRECATED_1_1_0
/* Provide some compatibility macros for removed functionality. */
#define SSL_CTX_need_tmp_RSA(ctx) 0
#define SSL_CTX_set_tmp_rsa(ctx, rsa) 1
#define SSL_need_tmp_RSA(ssl) 0
#define SSL_set_tmp_rsa(ssl, rsa) 1
#define SSL_CTX_set_ecdh_auto(dummy, onoff) ((onoff) != 0)
#define SSL_set_ecdh_auto(dummy, onoff) ((onoff) != 0)
/*
 * We "pretend" to call the callback to avoid warnings about unused static
 * functions.
 */
#define SSL_CTX_set_tmp_rsa_callback(ctx, cb) \
    while (0)                                 \
    (cb)(NULL, 0, 0)
#define SSL_set_tmp_rsa_callback(ssl, cb) \
    while (0)                             \
    (cb)(NULL, 0, 0)
#endif
    __owur const BIO_METHOD* BIO_f_ssl(void);
    __owur BIO* BIO_new_ssl(SSL_CTX* ctx, int client);
    __owur BIO* BIO_new_ssl_connect(SSL_CTX* ctx);
    __owur BIO* BIO_new_buffer_ssl_connect(SSL_CTX* ctx);
    __owur int BIO_ssl_copy_session_id(BIO* to, BIO* from);
    void BIO_ssl_shutdown(BIO* ssl_bio);

    __owur int SSL_CTX_set_cipher_list(SSL_CTX*, const char* str);
    __owur SSL_CTX* SSL_CTX_new(const SSL_METHOD* meth);
    __owur SSL_CTX* SSL_CTX_new_ex(OSSL_LIB_CTX* libctx, const char* propq, const SSL_METHOD* meth);
    int SSL_CTX_up_ref(SSL_CTX* ctx);
    void SSL_CTX_free(SSL_CTX*);
    __owur long SSL_CTX_set_timeout(SSL_CTX* ctx, long t);
    __owur long SSL_CTX_get_timeout(const SSL_CTX* ctx);
    __owur 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*, X509_STORE*);
    __owur int SSL_want(const SSL* s);
    __owur int SSL_clear(SSL* s);

    void SSL_CTX_flush_sessions(SSL_CTX* ctx, long tm);

    __owur const SSL_CIPHER* SSL_get_current_cipher(const SSL* s);
    __owur const SSL_CIPHER* SSL_get_pending_cipher(const SSL* s);
    __owur int SSL_CIPHER_get_bits(const SSL_CIPHER* c, int* alg_bits);
    __owur const char* SSL_CIPHER_get_version(const SSL_CIPHER* c);
    __owur const char* SSL_CIPHER_get_name(const SSL_CIPHER* c);
    __owur const char* SSL_CIPHER_standard_name(const SSL_CIPHER* c);
    __owur const char* OPENSSL_cipher_name(const char* rfc_name);
    __owur uint32_t SSL_CIPHER_get_id(const SSL_CIPHER* c);
    __owur uint16_t SSL_CIPHER_get_protocol_id(const SSL_CIPHER* c);
    __owur int SSL_CIPHER_get_kx_nid(const SSL_CIPHER* c);
    __owur int SSL_CIPHER_get_auth_nid(const SSL_CIPHER* c);
    __owur const EVP_MD* SSL_CIPHER_get_handshake_digest(const SSL_CIPHER* c);
    __owur int SSL_CIPHER_is_aead(const SSL_CIPHER* c);

    __owur int SSL_get_fd(const SSL* s);
    __owur int SSL_get_rfd(const SSL* s);
    __owur int SSL_get_wfd(const SSL* s);
    __owur const char* SSL_get_cipher_list(const SSL* s, int n);
    __owur char* SSL_get_shared_ciphers(const SSL* s, char* buf, int size);
    __owur int SSL_get_read_ahead(const SSL* s);
    __owur int SSL_pending(const SSL* s);
    __owur int SSL_has_pending(const SSL* s);
#ifndef OPENSSL_NO_SOCK
    __owur int SSL_set_fd(SSL* s, int fd);
    __owur int SSL_set_rfd(SSL* s, int fd);
    __owur int SSL_set_wfd(SSL* s, int fd);
#endif
    void SSL_set0_rbio(SSL* s, BIO* rbio);
    void SSL_set0_wbio(SSL* s, BIO* wbio);
    void SSL_set_bio(SSL* s, BIO* rbio, BIO* wbio);
    __owur BIO* SSL_get_rbio(const SSL* s);
    __owur BIO* SSL_get_wbio(const SSL* s);
    __owur int SSL_set_cipher_list(SSL* s, const char* str);
    __owur int SSL_CTX_set_ciphersuites(SSL_CTX* ctx, const char* str);
    __owur int SSL_set_ciphersuites(SSL* s, const char* str);
    void SSL_set_read_ahead(SSL* s, int yes);
    __owur int SSL_get_verify_mode(const SSL* s);
    __owur int SSL_get_verify_depth(const SSL* s);
    __owur SSL_verify_cb SSL_get_verify_callback(const SSL* s);
    void SSL_set_verify(SSL* s, int mode, SSL_verify_cb callback);
    void SSL_set_verify_depth(SSL* s, int depth);
    void SSL_set_cert_cb(SSL* s, int (*cb)(SSL* ssl, void* arg), void* arg);
#ifndef OPENSSL_NO_DEPRECATED_3_0
    OSSL_DEPRECATEDIN_3_0 __owur int SSL_use_RSAPrivateKey(SSL* ssl, RSA* rsa);
    OSSL_DEPRECATEDIN_3_0
    __owur int SSL_use_RSAPrivateKey_ASN1(SSL* ssl, const unsigned char* d, long len);
#endif
    __owur int SSL_use_PrivateKey(SSL* ssl, EVP_PKEY* pkey);
    __owur int SSL_use_PrivateKey_ASN1(int pk, SSL* ssl, const unsigned char* d, long len);
    __owur int SSL_use_certificate(SSL* ssl, X509* x);
    __owur int SSL_use_certificate_ASN1(SSL* ssl, const unsigned char* d, int len);
    __owur int SSL_use_cert_and_key(SSL* ssl, X509* x509, EVP_PKEY* privatekey, STACK_OF(X509) * chain, int override);

/* serverinfo file format versions */
#define SSL_SERVERINFOV1 1
#define SSL_SERVERINFOV2 2

    /* Set serverinfo data for the current active cert. */
    __owur int SSL_CTX_use_serverinfo(SSL_CTX* ctx, const unsigned char* serverinfo, size_t serverinfo_length);
    __owur int SSL_CTX_use_serverinfo_ex(SSL_CTX* ctx, unsigned int version, const unsigned char* serverinfo, size_t serverinfo_length);
    __owur int SSL_CTX_use_serverinfo_file(SSL_CTX* ctx, const char* file);

#ifndef OPENSSL_NO_DEPRECATED_3_0
    OSSL_DEPRECATEDIN_3_0
    __owur int SSL_use_RSAPrivateKey_file(SSL* ssl, const char* file, int type);
#endif

    __owur int SSL_use_PrivateKey_file(SSL* ssl, const char* file, int type);
    __owur int SSL_use_certificate_file(SSL* ssl, const char* file, int type);

#ifndef OPENSSL_NO_DEPRECATED_3_0
    OSSL_DEPRECATEDIN_3_0
    __owur int SSL_CTX_use_RSAPrivateKey_file(SSL_CTX* ctx, const char* file, int type);
#endif
    __owur int SSL_CTX_use_PrivateKey_file(SSL_CTX* ctx, const char* file, int type);
    __owur int SSL_CTX_use_certificate_file(SSL_CTX* ctx, const char* file, int type);
    /* PEM type */
    __owur int SSL_CTX_use_certificate_chain_file(SSL_CTX* ctx, const char* file);
    __owur int SSL_use_certificate_chain_file(SSL* ssl, const char* file);
    __owur STACK_OF(X509_NAME) * SSL_load_client_CA_file(const char* file);
    __owur STACK_OF(X509_NAME) * SSL_load_client_CA_file_ex(const char* file, OSSL_LIB_CTX* libctx, const char* propq);
    __owur 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);
    int SSL_add_store_cert_subjects_to_stack(STACK_OF(X509_NAME) * stackCAs, const char* uri);

#ifndef OPENSSL_NO_DEPRECATED_1_1_0
#define SSL_load_error_strings() \
    OPENSSL_init_ssl(OPENSSL_INIT_LOAD_SSL_STRINGS | OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL)
#endif

    __owur const char* SSL_state_string(const SSL* s);
    __owur const char* SSL_rstate_string(const SSL* s);
    __owur const char* SSL_state_string_long(const SSL* s);
    __owur const char* SSL_rstate_string_long(const SSL* s);
    __owur long SSL_SESSION_get_time(const SSL_SESSION* s);
    __owur long SSL_SESSION_set_time(SSL_SESSION* s, long t);
    __owur long SSL_SESSION_get_timeout(const SSL_SESSION* s);
    __owur long SSL_SESSION_set_timeout(SSL_SESSION* s, long t);
    __owur int SSL_SESSION_get_protocol_version(const SSL_SESSION* s);
    __owur int SSL_SESSION_set_protocol_version(SSL_SESSION* s, int version);

    __owur const char* SSL_SESSION_get0_hostname(const SSL_SESSION* s);
    __owur int SSL_SESSION_set1_hostname(SSL_SESSION* s, const char* hostname);
    void SSL_SESSION_get0_alpn_selected(const SSL_SESSION* s, const unsigned char** alpn, size_t* len);
    __owur int SSL_SESSION_set1_alpn_selected(SSL_SESSION* s, const unsigned char* alpn, size_t len);
    __owur const SSL_CIPHER* SSL_SESSION_get0_cipher(const SSL_SESSION* s);
    __owur int SSL_SESSION_set_cipher(SSL_SESSION* s, const SSL_CIPHER* cipher);
    __owur int SSL_SESSION_has_ticket(const SSL_SESSION* s);
    __owur unsigned long SSL_SESSION_get_ticket_lifetime_hint(const SSL_SESSION* s);
    void SSL_SESSION_get0_ticket(const SSL_SESSION* s, const unsigned char** tick, size_t* len);
    __owur uint32_t SSL_SESSION_get_max_early_data(const SSL_SESSION* s);
    __owur int SSL_SESSION_set_max_early_data(SSL_SESSION* s, uint32_t max_early_data);
    __owur int SSL_copy_session_id(SSL* to, const SSL* from);
    __owur X509* SSL_SESSION_get0_peer(SSL_SESSION* s);
    __owur int SSL_SESSION_set1_id_context(SSL_SESSION* s, const unsigned char* sid_ctx, unsigned int sid_ctx_len);
    __owur int SSL_SESSION_set1_id(SSL_SESSION* s, const unsigned char* sid, unsigned int sid_len);
    __owur int SSL_SESSION_is_resumable(const SSL_SESSION* s);

    __owur SSL_SESSION* SSL_SESSION_new(void);
    __owur SSL_SESSION* SSL_SESSION_dup(const SSL_SESSION* src);
    const unsigned char* SSL_SESSION_get_id(const SSL_SESSION* s, unsigned int* len);
    const unsigned char* SSL_SESSION_get0_id_context(const SSL_SESSION* s, unsigned int* len);
    __owur unsigned int SSL_SESSION_get_compress_id(const SSL_SESSION* s);
#ifndef OPENSSL_NO_STDIO
    int SSL_SESSION_print_fp(FILE* fp, const SSL_SESSION* ses);
#endif
    int SSL_SESSION_print(BIO* fp, const SSL_SESSION* ses);
    int SSL_SESSION_print_keylog(BIO* bp, const SSL_SESSION* x);
    int SSL_SESSION_up_ref(SSL_SESSION* ses);
    void SSL_SESSION_free(SSL_SESSION* ses);
    __owur int i2d_SSL_SESSION(const SSL_SESSION* in, unsigned char** pp);
    __owur int SSL_set_session(SSL* to, SSL_SESSION* session);
    int SSL_CTX_add_session(SSL_CTX* ctx, SSL_SESSION* session);
    int SSL_CTX_remove_session(SSL_CTX* ctx, SSL_SESSION* session);
    __owur int SSL_CTX_set_generate_session_id(SSL_CTX* ctx, GEN_SESSION_CB cb);
    __owur int SSL_set_generate_session_id(SSL* s, GEN_SESSION_CB cb);
    __owur int SSL_has_matching_session_id(const SSL* s, const unsigned char* id, unsigned int id_len);
    SSL_SESSION* d2i_SSL_SESSION(SSL_SESSION** a, const unsigned char** pp, long length);

#ifdef OPENSSL_X509_H
    __owur X509* SSL_get0_peer_certificate(const SSL* s);
    __owur X509* SSL_get1_peer_certificate(const SSL* s);
/* Deprecated in 3.0.0 */
#ifndef OPENSSL_NO_DEPRECATED_3_0
#define SSL_get_peer_certificate SSL_get1_peer_certificate
#endif
#endif

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

    __owur int SSL_CTX_get_verify_mode(const SSL_CTX* ctx);
    __owur int SSL_CTX_get_verify_depth(const SSL_CTX* ctx);
    __owur SSL_verify_cb SSL_CTX_get_verify_callback(const SSL_CTX* ctx);
    void SSL_CTX_set_verify(SSL_CTX* ctx, int mode, SSL_verify_cb callback);
    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);
    void SSL_CTX_set_cert_cb(SSL_CTX* c, int (*cb)(SSL* ssl, void* arg), void* arg);
#ifndef OPENSSL_NO_DEPRECATED_3_0
    OSSL_DEPRECATEDIN_3_0
    __owur int SSL_CTX_use_RSAPrivateKey(SSL_CTX* ctx, RSA* rsa);
    OSSL_DEPRECATEDIN_3_0
    __owur int SSL_CTX_use_RSAPrivateKey_ASN1(SSL_CTX* ctx, const unsigned char* d, long len);
#endif
    __owur int SSL_CTX_use_PrivateKey(SSL_CTX* ctx, EVP_PKEY* pkey);
    __owur int SSL_CTX_use_PrivateKey_ASN1(int pk, SSL_CTX* ctx, const unsigned char* d, long len);
    __owur int SSL_CTX_use_certificate(SSL_CTX* ctx, X509* x);
    __owur int SSL_CTX_use_certificate_ASN1(SSL_CTX* ctx, int len, const unsigned char* d);
    __owur int SSL_CTX_use_cert_and_key(SSL_CTX* ctx, X509* x509, EVP_PKEY* privatekey, STACK_OF(X509) * chain, int override);

    void SSL_CTX_set_default_passwd_cb(SSL_CTX* ctx, pem_password_cb* cb);
    void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX* ctx, void* u);
    pem_password_cb* SSL_CTX_get_default_passwd_cb(SSL_CTX* ctx);
    void* SSL_CTX_get_default_passwd_cb_userdata(SSL_CTX* ctx);
    void SSL_set_default_passwd_cb(SSL* s, pem_password_cb* cb);
    void SSL_set_default_passwd_cb_userdata(SSL* s, void* u);
    pem_password_cb* SSL_get_default_passwd_cb(SSL* s);
    void* SSL_get_default_passwd_cb_userdata(SSL* s);

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

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

    SSL* SSL_new(SSL_CTX* ctx);
    int SSL_up_ref(SSL* s);
    int SSL_is_dtls(const SSL* s);
    __owur int SSL_set_session_id_context(SSL* ssl, const unsigned char* sid_ctx, unsigned int sid_ctx_len);

    __owur int SSL_CTX_set_purpose(SSL_CTX* ctx, int purpose);
    __owur int SSL_set_purpose(SSL* ssl, int purpose);
    __owur int SSL_CTX_set_trust(SSL_CTX* ctx, int trust);
    __owur int SSL_set_trust(SSL* ssl, int trust);

    __owur int SSL_set1_host(SSL* s, const char* hostname);
    __owur int SSL_add1_host(SSL* s, const char* hostname);
    __owur const char* SSL_get0_peername(SSL* s);
    void SSL_set_hostflags(SSL* s, unsigned int flags);

    __owur int SSL_CTX_dane_enable(SSL_CTX* ctx);
    __owur int SSL_CTX_dane_mtype_set(SSL_CTX* ctx, const EVP_MD* md, uint8_t mtype, uint8_t ord);
    __owur int SSL_dane_enable(SSL* s, const char* basedomain);
    __owur int SSL_dane_tlsa_add(SSL* s, uint8_t usage, uint8_t selector, uint8_t mtype, const unsigned char* data, size_t dlen);
    __owur int SSL_get0_dane_authority(SSL* s, X509** mcert, EVP_PKEY** mspki);
    __owur int SSL_get0_dane_tlsa(SSL* s, uint8_t* usage, uint8_t* selector, uint8_t* mtype, const unsigned char** data, size_t* dlen);
    /*
     * Bridge opacity barrier between libcrypt and libssl, also needed to support
     * offline testing in test/danetest.c
     */
    SSL_DANE* SSL_get0_dane(SSL* ssl);
    /*
     * DANE flags
     */
    unsigned long SSL_CTX_dane_set_flags(SSL_CTX* ctx, unsigned long flags);
    unsigned long SSL_CTX_dane_clear_flags(SSL_CTX* ctx, unsigned long flags);
    unsigned long SSL_dane_set_flags(SSL* ssl, unsigned long flags);
    unsigned long SSL_dane_clear_flags(SSL* ssl, unsigned long flags);

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

    __owur X509_VERIFY_PARAM* SSL_CTX_get0_param(SSL_CTX* ctx);
    __owur X509_VERIFY_PARAM* SSL_get0_param(SSL* ssl);

#ifndef OPENSSL_NO_SRP
#ifndef OPENSSL_NO_DEPRECATED_3_0
    OSSL_DEPRECATEDIN_3_0 int SSL_CTX_set_srp_username(SSL_CTX* ctx, char* name);
    OSSL_DEPRECATEDIN_3_0 int SSL_CTX_set_srp_password(SSL_CTX* ctx, char* password);
    OSSL_DEPRECATEDIN_3_0 int SSL_CTX_set_srp_strength(SSL_CTX* ctx, int strength);
    OSSL_DEPRECATEDIN_3_0
    int SSL_CTX_set_srp_client_pwd_callback(SSL_CTX* ctx, char* (*cb)(SSL*, void*));
    OSSL_DEPRECATEDIN_3_0
    int SSL_CTX_set_srp_verify_param_callback(SSL_CTX* ctx, int (*cb)(SSL*, void*));
    OSSL_DEPRECATEDIN_3_0
    int SSL_CTX_set_srp_username_callback(SSL_CTX* ctx, int (*cb)(SSL*, int*, void*));
    OSSL_DEPRECATEDIN_3_0 int SSL_CTX_set_srp_cb_arg(SSL_CTX* ctx, void* arg);

    OSSL_DEPRECATEDIN_3_0
    int SSL_set_srp_server_param(SSL* s, const BIGNUM* N, const BIGNUM* g, BIGNUM* sa, BIGNUM* v, char* info);
    OSSL_DEPRECATEDIN_3_0
    int SSL_set_srp_server_param_pw(SSL* s, const char* user, const char* pass, const char* grp);

    OSSL_DEPRECATEDIN_3_0 __owur BIGNUM* SSL_get_srp_g(SSL* s);
    OSSL_DEPRECATEDIN_3_0 __owur BIGNUM* SSL_get_srp_N(SSL* s);

    OSSL_DEPRECATEDIN_3_0 __owur char* SSL_get_srp_username(SSL* s);
    OSSL_DEPRECATEDIN_3_0 __owur char* SSL_get_srp_userinfo(SSL* s);
#endif
#endif

    /*
     * ClientHello callback and helpers.
     */

#define SSL_CLIENT_HELLO_SUCCESS 1
#define SSL_CLIENT_HELLO_ERROR 0
#define SSL_CLIENT_HELLO_RETRY (-1)

    typedef int (*SSL_client_hello_cb_fn)(SSL* s, int* al, void* arg);
    void SSL_CTX_set_client_hello_cb(SSL_CTX* c, SSL_client_hello_cb_fn cb, void* arg);
    int SSL_client_hello_isv2(SSL* s);
    unsigned int SSL_client_hello_get0_legacy_version(SSL* s);
    size_t SSL_client_hello_get0_random(SSL* s, const unsigned char** out);
    size_t SSL_client_hello_get0_session_id(SSL* s, const unsigned char** out);
    size_t SSL_client_hello_get0_ciphers(SSL* s, const unsigned char** out);
    size_t SSL_client_hello_get0_compression_methods(SSL* s, const unsigned char** out);
    int SSL_client_hello_get1_extensions_present(SSL* s, int** out, size_t* outlen);
    int SSL_client_hello_get0_ext(SSL* s, unsigned int type, const unsigned char** out, size_t* outlen);

    void SSL_certs_clear(SSL* s);
    void SSL_free(SSL* ssl);
#ifdef OSSL_ASYNC_FD
    /*
     * Windows application developer has to include windows.h to use these.
     */
    __owur int SSL_waiting_for_async(SSL* s);
    __owur int SSL_get_all_async_fds(SSL* s, OSSL_ASYNC_FD* fds, size_t* numfds);
    __owur int SSL_get_changed_async_fds(SSL* s, OSSL_ASYNC_FD* addfd, size_t* numaddfds, OSSL_ASYNC_FD* delfd, size_t* numdelfds);
    __owur int SSL_CTX_set_async_callback(SSL_CTX* ctx, SSL_async_callback_fn callback);
    __owur int SSL_CTX_set_async_callback_arg(SSL_CTX* ctx, void* arg);
    __owur int SSL_set_async_callback(SSL* s, SSL_async_callback_fn callback);
    __owur int SSL_set_async_callback_arg(SSL* s, void* arg);
    __owur int SSL_get_async_status(SSL* s, int* status);

#endif
    __owur int SSL_accept(SSL* ssl);
    __owur int SSL_stateless(SSL* s);
    __owur int SSL_connect(SSL* ssl);
    __owur int SSL_read(SSL* ssl, void* buf, int num);
    __owur int SSL_read_ex(SSL* ssl, void* buf, size_t num, size_t* readbytes);

#define SSL_READ_EARLY_DATA_ERROR 0
#define SSL_READ_EARLY_DATA_SUCCESS 1
#define SSL_READ_EARLY_DATA_FINISH 2

    __owur int SSL_read_early_data(SSL* s, void* buf, size_t num, size_t* readbytes);
    __owur int SSL_peek(SSL* ssl, void* buf, int num);
    __owur int SSL_peek_ex(SSL* ssl, void* buf, size_t num, size_t* readbytes);
    __owur ossl_ssize_t SSL_sendfile(SSL* s, int fd, off_t offset, size_t size, int flags);
    __owur int SSL_write(SSL* ssl, const void* buf, int num);
    __owur int SSL_write_ex(SSL* s, const void* buf, size_t num, size_t* written);
    __owur int SSL_write_early_data(SSL* s, const void* buf, size_t num, size_t* written);
    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));

#define SSL_EARLY_DATA_NOT_SENT 0
#define SSL_EARLY_DATA_REJECTED 1
#define SSL_EARLY_DATA_ACCEPTED 2

    __owur int SSL_get_early_data_status(const SSL* s);

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

/* This sets the 'default' SSL version that SSL_new() will create */
#ifndef OPENSSL_NO_DEPRECATED_3_0
    OSSL_DEPRECATEDIN_3_0
    __owur int SSL_CTX_set_ssl_version(SSL_CTX* ctx, const SSL_METHOD* meth);
#endif

#ifndef OPENSSL_NO_SSL3_METHOD
#ifndef OPENSSL_NO_DEPRECATED_1_1_0
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* SSLv3_method(void); /* SSLv3 */
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* SSLv3_server_method(void);
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* SSLv3_client_method(void);
#endif
#endif

#define SSLv23_method TLS_method
#define SSLv23_server_method TLS_server_method
#define SSLv23_client_method TLS_client_method

    /* Negotiate highest available SSL/TLS version */
    __owur const SSL_METHOD* TLS_method(void);
    __owur const SSL_METHOD* TLS_server_method(void);
    __owur const SSL_METHOD* TLS_client_method(void);

#ifndef OPENSSL_NO_TLS1_METHOD
#ifndef OPENSSL_NO_DEPRECATED_1_1_0
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* TLSv1_method(void); /* TLSv1.0 */
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* TLSv1_server_method(void);
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* TLSv1_client_method(void);
#endif
#endif

#ifndef OPENSSL_NO_TLS1_1_METHOD
#ifndef OPENSSL_NO_DEPRECATED_1_1_0
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* TLSv1_1_method(void); /* TLSv1.1 */
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* TLSv1_1_server_method(void);
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* TLSv1_1_client_method(void);
#endif
#endif

#ifndef OPENSSL_NO_TLS1_2_METHOD
#ifndef OPENSSL_NO_DEPRECATED_1_1_0
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* TLSv1_2_method(void); /* TLSv1.2 */
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* TLSv1_2_server_method(void);
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* TLSv1_2_client_method(void);
#endif
#endif

#ifndef OPENSSL_NO_DTLS1_METHOD
#ifndef OPENSSL_NO_DEPRECATED_1_1_0
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* DTLSv1_method(void); /* DTLSv1.0 */
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* DTLSv1_server_method(void);
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* DTLSv1_client_method(void);
#endif
#endif

#ifndef OPENSSL_NO_DTLS1_2_METHOD
/* DTLSv1.2 */
#ifndef OPENSSL_NO_DEPRECATED_1_1_0
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* DTLSv1_2_method(void);
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* DTLSv1_2_server_method(void);
    OSSL_DEPRECATEDIN_1_1_0 __owur const SSL_METHOD* DTLSv1_2_client_method(void);
#endif
#endif

    __owur const SSL_METHOD* DTLS_method(void);        /* DTLS 1.0 and 1.2 */
    __owur const SSL_METHOD* DTLS_server_method(void); /* DTLS 1.0 and 1.2 */
    __owur const SSL_METHOD* DTLS_client_method(void); /* DTLS 1.0 and 1.2 */

    __owur size_t DTLS_get_data_mtu(const SSL* s);

    __owur STACK_OF(SSL_CIPHER) * SSL_get_ciphers(const SSL* s);
    __owur STACK_OF(SSL_CIPHER) * SSL_CTX_get_ciphers(const SSL_CTX* ctx);
    __owur STACK_OF(SSL_CIPHER) * SSL_get_client_ciphers(const SSL* s);
    __owur STACK_OF(SSL_CIPHER) * SSL_get1_supported_ciphers(SSL* s);

    __owur int SSL_do_handshake(SSL* s);
    int SSL_key_update(SSL* s, int updatetype);
    int SSL_get_key_update_type(const SSL* s);
    int SSL_renegotiate(SSL* s);
    int SSL_renegotiate_abbreviated(SSL* s);
    __owur int SSL_renegotiate_pending(const SSL* s);
    int SSL_new_session_ticket(SSL* s);
    int SSL_shutdown(SSL* s);
    __owur 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);

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

    void SSL_set0_CA_list(SSL* s, STACK_OF(X509_NAME) * name_list);
    void SSL_CTX_set0_CA_list(SSL_CTX* ctx, STACK_OF(X509_NAME) * name_list);
    __owur const STACK_OF(X509_NAME) * SSL_get0_CA_list(const SSL* s);
    __owur const STACK_OF(X509_NAME) * SSL_CTX_get0_CA_list(const SSL_CTX* ctx);
    __owur int SSL_add1_to_CA_list(SSL* ssl, const X509* x);
    __owur int SSL_CTX_add1_to_CA_list(SSL_CTX* ctx, const X509* x);
    __owur const STACK_OF(X509_NAME) * SSL_get0_peer_CA_list(const SSL* s);

    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);
    __owur STACK_OF(X509_NAME) * SSL_get_client_CA_list(const SSL* s);
    __owur STACK_OF(X509_NAME) * SSL_CTX_get_client_CA_list(const SSL_CTX* s);
    __owur int SSL_add_client_CA(SSL* ssl, X509* x);
    __owur 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);

    __owur long SSL_get_default_timeout(const SSL* s);

#ifndef OPENSSL_NO_DEPRECATED_1_1_0
#define SSL_library_init() OPENSSL_init_ssl(0, NULL)
#endif

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

    __owur SSL* SSL_dup(SSL* ssl);

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

    __owur X509* SSL_CTX_get0_certificate(const SSL_CTX* ctx);
    __owur EVP_PKEY* SSL_CTX_get0_privatekey(const SSL_CTX* ctx);

    void SSL_CTX_set_quiet_shutdown(SSL_CTX* ctx, int mode);
    __owur int SSL_CTX_get_quiet_shutdown(const SSL_CTX* ctx);
    void SSL_set_quiet_shutdown(SSL* ssl, int mode);
    __owur int SSL_get_quiet_shutdown(const SSL* ssl);
    void SSL_set_shutdown(SSL* ssl, int mode);
    __owur int SSL_get_shutdown(const SSL* ssl);
    __owur int SSL_version(const SSL* ssl);
    __owur int SSL_client_version(const SSL* s);
    __owur int SSL_CTX_set_default_verify_paths(SSL_CTX* ctx);
    __owur int SSL_CTX_set_default_verify_dir(SSL_CTX* ctx);
    __owur int SSL_CTX_set_default_verify_file(SSL_CTX* ctx);
    __owur int SSL_CTX_set_default_verify_store(SSL_CTX* ctx);
    __owur int SSL_CTX_load_verify_file(SSL_CTX* ctx, const char* CAfile);
    __owur int SSL_CTX_load_verify_dir(SSL_CTX* ctx, const char* CApath);
    __owur int SSL_CTX_load_verify_store(SSL_CTX* ctx, const char* CAstore);
    __owur int SSL_CTX_load_verify_locations(SSL_CTX* ctx, const char* CAfile, const char* CApath);
#define SSL_get0_session SSL_get_session /* just peek at pointer */
    __owur SSL_SESSION* SSL_get_session(const SSL* ssl);
    __owur SSL_SESSION* SSL_get1_session(SSL* ssl); /* obtain a reference count */
    __owur 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);
    __owur OSSL_HANDSHAKE_STATE SSL_get_state(const SSL* ssl);

    void SSL_set_verify_result(SSL* ssl, long v);
    __owur long SSL_get_verify_result(const SSL* ssl);
    __owur STACK_OF(X509) * SSL_get0_verified_chain(const SSL* s);

    __owur size_t SSL_get_client_random(const SSL* ssl, unsigned char* out, size_t outlen);
    __owur size_t SSL_get_server_random(const SSL* ssl, unsigned char* out, size_t outlen);
    __owur size_t SSL_SESSION_get_master_key(const SSL_SESSION* sess, unsigned char* out, size_t outlen);
    __owur int SSL_SESSION_set1_master_key(SSL_SESSION* sess, const unsigned char* in, size_t len);
    uint8_t SSL_SESSION_get_max_fragment_length(const SSL_SESSION* sess);

#define SSL_get_ex_new_index(l, p, newf, dupf, freef) \
    CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, l, p, newf, dupf, freef)
    __owur int SSL_set_ex_data(SSL* ssl, int idx, void* data);
    void* SSL_get_ex_data(const SSL* ssl, int idx);
#define SSL_SESSION_get_ex_new_index(l, p, newf, dupf, freef) \
    CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_SESSION, l, p, newf, dupf, freef)
    __owur 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);
#define SSL_CTX_get_ex_new_index(l, p, newf, dupf, freef) \
    CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, l, p, newf, dupf, freef)
    __owur 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);

    __owur 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)
#define SSL_CTX_set_split_send_fragment(ctx, m) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_SPLIT_SEND_FRAGMENT, m, NULL)
#define SSL_set_split_send_fragment(ssl, m) \
    SSL_ctrl(ssl, SSL_CTRL_SET_SPLIT_SEND_FRAGMENT, m, NULL)
#define SSL_CTX_set_max_pipelines(ctx, m) \
    SSL_CTX_ctrl(ctx, SSL_CTRL_SET_MAX_PIPELINES, m, NULL)
#define SSL_set_max_pipelines(ssl, m) \
    SSL_ctrl(ssl, SSL_CTRL_SET_MAX_PIPELINES, m, NULL)
#define SSL_set_retry_verify(ssl) \
    (SSL_ctrl(ssl, SSL_CTRL_SET_RETRY_VERIFY, 0, NULL) > 0)

    void SSL_CTX_set_default_read_buffer_len(SSL_CTX* ctx, size_t len);
    void SSL_set_default_read_buffer_len(SSL* s, size_t len);

#ifndef OPENSSL_NO_DH
#ifndef OPENSSL_NO_DEPRECATED_3_0
    /* NB: the |keylength| is only applicable when is_export is true */
    OSSL_DEPRECATEDIN_3_0
    void SSL_CTX_set_tmp_dh_callback(SSL_CTX* ctx, DH* (*dh)(SSL* ssl, int is_export, int keylength));
    OSSL_DEPRECATEDIN_3_0
    void SSL_set_tmp_dh_callback(SSL* ssl, DH* (*dh)(SSL* ssl, int is_export, int keylength));
#endif
#endif

    __owur const COMP_METHOD* SSL_get_current_compression(const SSL* s);
    __owur const COMP_METHOD* SSL_get_current_expansion(const SSL* s);
    __owur const char* SSL_COMP_get_name(const COMP_METHOD* comp);
    __owur const char* SSL_COMP_get0_name(const SSL_COMP* comp);
    __owur int SSL_COMP_get_id(const SSL_COMP* comp);
    STACK_OF(SSL_COMP) * SSL_COMP_get_compression_methods(void);
    __owur STACK_OF(SSL_COMP) * SSL_COMP_set0_compression_methods(STACK_OF(SSL_COMP) * meths);
#ifndef OPENSSL_NO_DEPRECATED_1_1_0
#define SSL_COMP_free_compression_methods() \
    while (0)                               \
    continue
#endif
    __owur int SSL_COMP_add_compression_method(int id, COMP_METHOD* cm);

    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_bytes_to_cipher_list(SSL* s, const unsigned char* bytes, size_t len, int isv2format, STACK_OF(SSL_CIPHER) * *sk, STACK_OF(SSL_CIPHER) * *scsvs);

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

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

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

    void SSL_CTX_set_not_resumable_session_callback(SSL_CTX* ctx, int (*cb)(SSL* ssl, int is_forward_secure));

    void SSL_set_not_resumable_session_callback(SSL* ssl, int (*cb)(SSL* ssl, int is_forward_secure));

    void SSL_CTX_set_record_padding_callback(SSL_CTX* ctx, size_t (*cb)(SSL* ssl, int type, size_t len, void* arg));
    void SSL_CTX_set_record_padding_callback_arg(SSL_CTX* ctx, void* arg);
    void* SSL_CTX_get_record_padding_callback_arg(const SSL_CTX* ctx);
    int SSL_CTX_set_block_padding(SSL_CTX* ctx, size_t block_size);

    int SSL_set_record_padding_callback(SSL* ssl, size_t (*cb)(SSL* ssl, int type, size_t len, void* arg));
    void SSL_set_record_padding_callback_arg(SSL* ssl, void* arg);
    void* SSL_get_record_padding_callback_arg(const SSL* ssl);
    int SSL_set_block_padding(SSL* ssl, size_t block_size);

    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);

#ifndef OPENSSL_NO_DEPRECATED_1_1_0
#define SSL_cache_hit(s) SSL_session_reused(s)
#endif

    __owur int SSL_session_reused(const SSL* s);
    __owur int SSL_is_server(const SSL* s);

    __owur __owur SSL_CONF_CTX* SSL_CONF_CTX_new(void);
    int SSL_CONF_CTX_finish(SSL_CONF_CTX* cctx);
    void SSL_CONF_CTX_free(SSL_CONF_CTX* cctx);
    unsigned int SSL_CONF_CTX_set_flags(SSL_CONF_CTX* cctx, unsigned int flags);
    __owur unsigned int SSL_CONF_CTX_clear_flags(SSL_CONF_CTX* cctx, unsigned int flags);
    __owur int SSL_CONF_CTX_set1_prefix(SSL_CONF_CTX* cctx, const char* pre);

    void SSL_CONF_CTX_set_ssl(SSL_CONF_CTX* cctx, SSL* ssl);
    void SSL_CONF_CTX_set_ssl_ctx(SSL_CONF_CTX* cctx, SSL_CTX* ctx);

    __owur int SSL_CONF_cmd(SSL_CONF_CTX* cctx, const char* cmd, const char* value);
    __owur int SSL_CONF_cmd_argv(SSL_CONF_CTX* cctx, int* pargc, char*** pargv);
    __owur int SSL_CONF_cmd_value_type(SSL_CONF_CTX* cctx, const char* cmd);

    void SSL_add_ssl_module(void);
    int SSL_config(SSL* s, const char* name);
    int SSL_CTX_config(SSL_CTX* ctx, const char* name);

#ifndef OPENSSL_NO_SSL_TRACE
    void SSL_trace(int write_p, int version, int content_type, const void* buf, size_t len, SSL* ssl, void* arg);
#endif

#ifndef OPENSSL_NO_SOCK
    int DTLSv1_listen(SSL* s, BIO_ADDR* client);
#endif

#ifndef OPENSSL_NO_CT

    /*
     * A callback for verifying that the received SCTs are sufficient.
     * Expected to return 1 if they are sufficient, otherwise 0.
     * May return a negative integer if an error occurs.
     * A connection should be aborted if the SCTs are deemed insufficient.
     */
    typedef int (*ssl_ct_validation_cb)(const CT_POLICY_EVAL_CTX* ctx, const STACK_OF(SCT) * scts, void* arg);

    /*
     * Sets a |callback| that is invoked upon receipt of ServerHelloDone to validate
     * the received SCTs.
     * If the callback returns a non-positive result, the connection is terminated.
     * Call this function before beginning a handshake.
     * If a NULL |callback| is provided, SCT validation is disabled.
     * |arg| is arbitrary userdata that will be passed to the callback whenever it
     * is invoked. Ownership of |arg| remains with the caller.
     *
     * NOTE: A side-effect of setting a CT callback is that an OCSP stapled response
     *       will be requested.
     */
    int SSL_set_ct_validation_callback(SSL* s, ssl_ct_validation_cb callback, void* arg);
    int SSL_CTX_set_ct_validation_callback(SSL_CTX* ctx, ssl_ct_validation_cb callback, void* arg);
#define SSL_disable_ct(s) \
    ((void)SSL_set_validation_callback((s), NULL, NULL))
#define SSL_CTX_disable_ct(ctx) \
    ((void)SSL_CTX_set_validation_callback((ctx), NULL, NULL))

    /*
     * The validation type enumerates the available behaviours of the built-in SSL
     * CT validation callback selected via SSL_enable_ct() and SSL_CTX_enable_ct().
     * The underlying callback is a static function in libssl.
     */
    enum
    {
        SSL_CT_VALIDATION_PERMISSIVE = 0,
        SSL_CT_VALIDATION_STRICT
    };

    /*
     * Enable CT by setting up a callback that implements one of the built-in
     * validation variants.  The SSL_CT_VALIDATION_PERMISSIVE variant always
     * continues the handshake, the application can make appropriate decisions at
     * handshake completion.  The SSL_CT_VALIDATION_STRICT variant requires at
     * least one valid SCT, or else handshake termination will be requested.  The
     * handshake may continue anyway if SSL_VERIFY_NONE is in effect.
     */
    int SSL_enable_ct(SSL* s, int validation_mode);
    int SSL_CTX_enable_ct(SSL_CTX* ctx, int validation_mode);

    /*
     * Report whether a non-NULL callback is enabled.
     */
    int SSL_ct_is_enabled(const SSL* s);
    int SSL_CTX_ct_is_enabled(const SSL_CTX* ctx);

    /* Gets the SCTs received from a connection */
    const STACK_OF(SCT) * SSL_get0_peer_scts(SSL* s);

    /*
     * Loads the CT log list from the default location.
     * If a CTLOG_STORE has previously been set using SSL_CTX_set_ctlog_store,
     * the log information loaded from this file will be appended to the
     * CTLOG_STORE.
     * Returns 1 on success, 0 otherwise.
     */
    int SSL_CTX_set_default_ctlog_list_file(SSL_CTX* ctx);

    /*
     * Loads the CT log list from the specified file path.
     * If a CTLOG_STORE has previously been set using SSL_CTX_set_ctlog_store,
     * the log information loaded from this file will be appended to the
     * CTLOG_STORE.
     * Returns 1 on success, 0 otherwise.
     */
    int SSL_CTX_set_ctlog_list_file(SSL_CTX* ctx, const char* path);

    /*
     * Sets the CT log list used by all SSL connections created from this SSL_CTX.
     * Ownership of the CTLOG_STORE is transferred to the SSL_CTX.
     */
    void SSL_CTX_set0_ctlog_store(SSL_CTX* ctx, CTLOG_STORE* logs);

    /*
     * Gets the CT log list used by all SSL connections created from this SSL_CTX.
     * This will be NULL unless one of the following functions has been called:
     * - SSL_CTX_set_default_ctlog_list_file
     * - SSL_CTX_set_ctlog_list_file
     * - SSL_CTX_set_ctlog_store
     */
    const CTLOG_STORE* SSL_CTX_get0_ctlog_store(const SSL_CTX* ctx);

#endif /* OPENSSL_NO_CT */

/* 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 */
#define SSL_SECOP_TMP_DH (7 | SSL_SECOP_OTHER_PKEY)
/* 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* s, int level);
    __owur int SSL_get_security_level(const SSL* s);
    void SSL_set_security_callback(SSL* s, int (*cb)(const SSL* s, const SSL_CTX* ctx, int op, int bits, int nid, void* other, void* ex));
    int (*SSL_get_security_callback(const SSL* s))(const SSL* s, const SSL_CTX* ctx, int op, int bits, int nid, void* other, void* ex);
    void SSL_set0_security_ex_data(SSL* s, void* ex);
    __owur void* SSL_get0_security_ex_data(const SSL* s);

    void SSL_CTX_set_security_level(SSL_CTX* ctx, int level);
    __owur int SSL_CTX_get_security_level(const SSL_CTX* ctx);
    void SSL_CTX_set_security_callback(SSL_CTX* ctx, int (*cb)(const SSL* s, const SSL_CTX* ctx, int op, int bits, int nid, void* other, void* ex));
    int (*SSL_CTX_get_security_callback(const SSL_CTX* ctx))(const SSL* s, const SSL_CTX* ctx, int op, int bits, int nid, void* other, void* ex);
    void SSL_CTX_set0_security_ex_data(SSL_CTX* ctx, void* ex);
    __owur void* SSL_CTX_get0_security_ex_data(const SSL_CTX* ctx);

/* OPENSSL_INIT flag 0x010000 reserved for internal use */
#define OPENSSL_INIT_NO_LOAD_SSL_STRINGS 0x00100000L
#define OPENSSL_INIT_LOAD_SSL_STRINGS 0x00200000L

#define OPENSSL_INIT_SSL_DEFAULT \
    (OPENSSL_INIT_LOAD_SSL_STRINGS | OPENSSL_INIT_LOAD_CRYPTO_STRINGS)

    int OPENSSL_init_ssl(uint64_t opts, const OPENSSL_INIT_SETTINGS* settings);

#ifndef OPENSSL_NO_UNIT_TEST
    __owur const struct openssl_ssl_test_functions* SSL_test_functions(void);
#endif

    __owur int SSL_free_buffers(SSL* ssl);
    __owur int SSL_alloc_buffers(SSL* ssl);

    /* Status codes passed to the decrypt session ticket callback. Some of these
     * are for internal use only and are never passed to the callback. */
    typedef int SSL_TICKET_STATUS;

/* Support for ticket appdata */
/* fatal error, malloc failure */
#define SSL_TICKET_FATAL_ERR_MALLOC 0
/* fatal error, either from parsing or decrypting the ticket */
#define SSL_TICKET_FATAL_ERR_OTHER 1
/* No ticket present */
#define SSL_TICKET_NONE 2
/* Empty ticket present */
#define SSL_TICKET_EMPTY 3
/* the ticket couldn't be decrypted */
#define SSL_TICKET_NO_DECRYPT 4
/* a ticket was successfully decrypted */
#define SSL_TICKET_SUCCESS 5
/* same as above but the ticket needs to be renewed */
#define SSL_TICKET_SUCCESS_RENEW 6

    /* Return codes for the decrypt session ticket callback */
    typedef int SSL_TICKET_RETURN;

/* An error occurred */
#define SSL_TICKET_RETURN_ABORT 0
/* Do not use the ticket, do not send a renewed ticket to the client */
#define SSL_TICKET_RETURN_IGNORE 1
/* Do not use the ticket, send a renewed ticket to the client */
#define SSL_TICKET_RETURN_IGNORE_RENEW 2
/* Use the ticket, do not send a renewed ticket to the client */
#define SSL_TICKET_RETURN_USE 3
/* Use the ticket, send a renewed ticket to the client */
#define SSL_TICKET_RETURN_USE_RENEW 4

    typedef int (*SSL_CTX_generate_session_ticket_fn)(SSL* s, void* arg);
    typedef SSL_TICKET_RETURN (*SSL_CTX_decrypt_session_ticket_fn)(SSL* s, SSL_SESSION* ss, const unsigned char* keyname, size_t keyname_length, SSL_TICKET_STATUS status, void* arg);
    int SSL_CTX_set_session_ticket_cb(SSL_CTX* ctx, SSL_CTX_generate_session_ticket_fn gen_cb, SSL_CTX_decrypt_session_ticket_fn dec_cb, void* arg);
    int SSL_SESSION_set1_ticket_appdata(SSL_SESSION* ss, const void* data, size_t len);
    int SSL_SESSION_get0_ticket_appdata(SSL_SESSION* ss, void** data, size_t* len);

    typedef unsigned int (*DTLS_timer_cb)(SSL* s, unsigned int timer_us);

    void DTLS_set_timer_cb(SSL* s, DTLS_timer_cb cb);

    typedef int (*SSL_allow_early_data_cb_fn)(SSL* s, void* arg);
    void SSL_CTX_set_allow_early_data_cb(SSL_CTX* ctx, SSL_allow_early_data_cb_fn cb, void* arg);
    void SSL_set_allow_early_data_cb(SSL* s, SSL_allow_early_data_cb_fn cb, void* arg);

    /* store the default cipher strings inside the library */
    const char* OSSL_default_cipher_list(void);
    const char* OSSL_default_ciphersuites(void);

#ifdef __cplusplus
}
#endif
#endif