Edit

IABSD.fr/src/lib/libssl/ssl_methods.c

Branch :

  • Show log

    Commit

  • Author : jsing
    Date : 2020-07-07 19:31:11
    Hash : 25aa477e
    Message : Remove some unnecessary function pointers from SSL_METHOD_INTERNAL. ssl_version is completely unused and get_timeout is the same everywhere. ok beck@ inoguchi@ tb@

  • lib/libssl/ssl_methods.c
  • /* $OpenBSD: ssl_methods.c,v 1.14 2020/07/07 19:31:11 jsing Exp $ */
    /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
     * All rights reserved.
     *
     * This package is an SSL implementation written
     * by Eric Young (eay@cryptsoft.com).
     * The implementation was written so as to conform with Netscapes SSL.
     *
     * This library is free for commercial and non-commercial use as long as
     * the following conditions are aheared to.  The following conditions
     * apply to all code found in this distribution, be it the RC4, RSA,
     * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
     * included with this distribution is covered by the same copyright terms
     * except that the holder is Tim Hudson (tjh@cryptsoft.com).
     *
     * Copyright remains Eric Young's, and as such any Copyright notices in
     * the code are not to be removed.
     * If this package is used in a product, Eric Young should be given attribution
     * as the author of the parts of the library used.
     * This can be in the form of a textual message at program startup or
     * in documentation (online or textual) provided with the package.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *    "This product includes cryptographic software written by
     *     Eric Young (eay@cryptsoft.com)"
     *    The word 'cryptographic' can be left out if the rouines from the library
     *    being used are not cryptographic related :-).
     * 4. If you include any Windows specific code (or a derivative thereof) from
     *    the apps directory (application code) you must include an acknowledgement:
     *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
     *
     * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * The licence and distribution terms for any publically available version or
     * derivative of this code cannot be changed.  i.e. this code cannot simply be
     * copied and put under another distribution licence
     * [including the GNU Public Licence.]
     */
    
    #include "ssl_locl.h"
    #include "tls13_internal.h"
    
    static const SSL_METHOD_INTERNAL DTLSv1_client_method_internal_data = {
    	.version = DTLS1_VERSION,
    	.min_version = DTLS1_VERSION,
    	.max_version = DTLS1_VERSION,
    	.ssl_new = dtls1_new,
    	.ssl_clear = dtls1_clear,
    	.ssl_free = dtls1_free,
    	.ssl_accept = ssl_undefined_function,
    	.ssl_connect = ssl3_connect,
    	.ssl_shutdown = ssl3_shutdown,
    	.get_ssl_method = dtls1_get_client_method,
    	.ssl_renegotiate = ssl3_renegotiate,
    	.ssl_renegotiate_check = ssl3_renegotiate_check,
    	.ssl_pending = ssl3_pending,
    	.ssl_read_bytes = dtls1_read_bytes,
    	.ssl_write_bytes = dtls1_write_app_data_bytes,
    	.ssl3_enc = &DTLSv1_enc_data,
    };
    
    static const SSL_METHOD DTLSv1_client_method_data = {
    	.ssl_dispatch_alert = dtls1_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = dtls1_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &DTLSv1_client_method_internal_data,
    };
    
    const SSL_METHOD *
    DTLSv1_client_method(void)
    {
    	return &DTLSv1_client_method_data;
    }
    
    const SSL_METHOD *
    DTLS_client_method(void)
    {
    	return DTLSv1_client_method();
    }
    
    const SSL_METHOD *
    dtls1_get_client_method(int ver)
    {
    	if (ver == DTLS1_VERSION)
    		return (DTLSv1_client_method());
    	return (NULL);
    }
    
    static const SSL_METHOD *dtls1_get_method(int ver);
    
    static const SSL_METHOD_INTERNAL DTLSv1_method_internal_data = {
    	.version = DTLS1_VERSION,
    	.min_version = DTLS1_VERSION,
    	.max_version = DTLS1_VERSION,
    	.ssl_new = dtls1_new,
    	.ssl_clear = dtls1_clear,
    	.ssl_free = dtls1_free,
    	.ssl_accept = ssl3_accept,
    	.ssl_connect = ssl3_connect,
    	.ssl_shutdown = ssl3_shutdown,
    	.get_ssl_method = dtls1_get_method,
    	.ssl_renegotiate = ssl3_renegotiate,
    	.ssl_renegotiate_check = ssl3_renegotiate_check,
    	.ssl_pending = ssl3_pending,
    	.ssl_read_bytes = dtls1_read_bytes,
    	.ssl_write_bytes = dtls1_write_app_data_bytes,
    	.ssl3_enc = &DTLSv1_enc_data,
    };
    
    static const SSL_METHOD DTLSv1_method_data = {
    	.ssl_dispatch_alert = dtls1_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = dtls1_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &DTLSv1_method_internal_data,
    };
    
    const SSL_METHOD *
    DTLSv1_method(void)
    {
    	return &DTLSv1_method_data;
    }
    
    const SSL_METHOD *
    DTLS_method(void)
    {
    	return DTLSv1_method();
    }
    
    static const SSL_METHOD *
    dtls1_get_method(int ver)
    {
    	if (ver == DTLS1_VERSION)
    		return (DTLSv1_method());
    	return (NULL);
    }
    
    static const SSL_METHOD_INTERNAL DTLSv1_server_method_internal_data = {
    	.version = DTLS1_VERSION,
    	.min_version = DTLS1_VERSION,
    	.max_version = DTLS1_VERSION,
    	.ssl_new = dtls1_new,
    	.ssl_clear = dtls1_clear,
    	.ssl_free = dtls1_free,
    	.ssl_accept = ssl3_accept,
    	.ssl_connect = ssl_undefined_function,
    	.ssl_shutdown = ssl3_shutdown,
    	.get_ssl_method = dtls1_get_server_method,
    	.ssl_renegotiate = ssl3_renegotiate,
    	.ssl_renegotiate_check = ssl3_renegotiate_check,
    	.ssl_pending = ssl3_pending,
    	.ssl_read_bytes = dtls1_read_bytes,
    	.ssl_write_bytes = dtls1_write_app_data_bytes,
    	.ssl3_enc = &DTLSv1_enc_data,
    };
    
    static const SSL_METHOD DTLSv1_server_method_data = {
    	.ssl_dispatch_alert = dtls1_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = dtls1_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &DTLSv1_server_method_internal_data,
    };
    
    const SSL_METHOD *
    DTLSv1_server_method(void)
    {
    	return &DTLSv1_server_method_data;
    }
    
    const SSL_METHOD *
    DTLS_server_method(void)
    {
    	return DTLSv1_server_method();
    }
    
    const SSL_METHOD *
    dtls1_get_server_method(int ver)
    {
    	if (ver == DTLS1_VERSION)
    		return (DTLSv1_server_method());
    	return (NULL);
    }
    
    #ifdef LIBRESSL_HAS_TLS1_3_CLIENT
    static const SSL_METHOD_INTERNAL TLS_client_method_internal_data = {
    	.version = TLS1_3_VERSION,
    	.min_version = TLS1_VERSION,
    	.max_version = TLS1_3_VERSION,
    	.ssl_new = tls1_new,
    	.ssl_clear = tls1_clear,
    	.ssl_free = tls1_free,
    	.ssl_accept = ssl_undefined_function,
    	.ssl_connect = tls13_legacy_connect,
    	.ssl_shutdown = tls13_legacy_shutdown,
    	.get_ssl_method = tls1_get_client_method,
    	.ssl_renegotiate = ssl_undefined_function,
    	.ssl_renegotiate_check = ssl_ok,
    	.ssl_pending = tls13_legacy_pending,
    	.ssl_read_bytes = tls13_legacy_read_bytes,
    	.ssl_write_bytes = tls13_legacy_write_bytes,
    	.ssl3_enc = &TLSv1_3_enc_data,
    };
    
    static const SSL_METHOD TLS_client_method_data = {
    	.ssl_dispatch_alert = ssl3_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = ssl3_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &TLS_client_method_internal_data,
    };
    #endif
    
    static const SSL_METHOD_INTERNAL TLS_legacy_client_method_internal_data = {
    	.version = TLS1_2_VERSION,
    	.min_version = TLS1_VERSION,
    	.max_version = TLS1_2_VERSION,
    	.ssl_new = tls1_new,
    	.ssl_clear = tls1_clear,
    	.ssl_free = tls1_free,
    	.ssl_accept = ssl_undefined_function,
    	.ssl_connect = ssl3_connect,
    	.ssl_shutdown = ssl3_shutdown,
    	.get_ssl_method = tls1_get_client_method,
    	.ssl_renegotiate = ssl_undefined_function,
    	.ssl_renegotiate_check = ssl_ok,
    	.ssl_pending = ssl3_pending,
    	.ssl_read_bytes = ssl3_read_bytes,
    	.ssl_write_bytes = ssl3_write_bytes,
    	.ssl3_enc = &TLSv1_2_enc_data,
    };
    
    static const SSL_METHOD TLS_legacy_client_method_data = {
    	.ssl_dispatch_alert = ssl3_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = ssl3_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &TLS_legacy_client_method_internal_data,
    };
    
    static const SSL_METHOD_INTERNAL TLSv1_client_method_internal_data = {
    	.version = TLS1_VERSION,
    	.min_version = TLS1_VERSION,
    	.max_version = TLS1_VERSION,
    	.ssl_new = tls1_new,
    	.ssl_clear = tls1_clear,
    	.ssl_free = tls1_free,
    	.ssl_accept = ssl_undefined_function,
    	.ssl_connect = ssl3_connect,
    	.ssl_shutdown = ssl3_shutdown,
    	.get_ssl_method = tls1_get_client_method,
    	.ssl_renegotiate = ssl3_renegotiate,
    	.ssl_renegotiate_check = ssl3_renegotiate_check,
    	.ssl_pending = ssl3_pending,
    	.ssl_read_bytes = ssl3_read_bytes,
    	.ssl_write_bytes = ssl3_write_bytes,
    	.ssl3_enc = &TLSv1_enc_data,
    };
    
    static const SSL_METHOD TLSv1_client_method_data = {
    	.ssl_dispatch_alert = ssl3_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = ssl3_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &TLSv1_client_method_internal_data,
    };
    
    static const SSL_METHOD_INTERNAL TLSv1_1_client_method_internal_data = {
    	.version = TLS1_1_VERSION,
    	.min_version = TLS1_1_VERSION,
    	.max_version = TLS1_1_VERSION,
    	.ssl_new = tls1_new,
    	.ssl_clear = tls1_clear,
    	.ssl_free = tls1_free,
    	.ssl_accept = ssl_undefined_function,
    	.ssl_connect = ssl3_connect,
    	.ssl_shutdown = ssl3_shutdown,
    	.get_ssl_method = tls1_get_client_method,
    	.ssl_renegotiate = ssl3_renegotiate,
    	.ssl_renegotiate_check = ssl3_renegotiate_check,
    	.ssl_pending = ssl3_pending,
    	.ssl_read_bytes = ssl3_read_bytes,
    	.ssl_write_bytes = ssl3_write_bytes,
    	.ssl3_enc = &TLSv1_1_enc_data,
    };
    
    static const SSL_METHOD TLSv1_1_client_method_data = {
    	.ssl_dispatch_alert = ssl3_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = ssl3_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &TLSv1_1_client_method_internal_data,
    };
    
    static const SSL_METHOD_INTERNAL TLSv1_2_client_method_internal_data = {
    	.version = TLS1_2_VERSION,
    	.min_version = TLS1_2_VERSION,
    	.max_version = TLS1_2_VERSION,
    	.ssl_new = tls1_new,
    	.ssl_clear = tls1_clear,
    	.ssl_free = tls1_free,
    	.ssl_accept = ssl_undefined_function,
    	.ssl_connect = ssl3_connect,
    	.ssl_shutdown = ssl3_shutdown,
    	.get_ssl_method = tls1_get_client_method,
    	.ssl_renegotiate = ssl3_renegotiate,
    	.ssl_renegotiate_check = ssl3_renegotiate_check,
    	.ssl_pending = ssl3_pending,
    	.ssl_read_bytes = ssl3_read_bytes,
    	.ssl_write_bytes = ssl3_write_bytes,
    	.ssl3_enc = &TLSv1_2_enc_data,
    };
    
    static const SSL_METHOD TLSv1_2_client_method_data = {
    	.ssl_dispatch_alert = ssl3_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = ssl3_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &TLSv1_2_client_method_internal_data,
    };
    
    const SSL_METHOD *
    tls1_get_client_method(int ver)
    {
    #ifdef LIBRESSL_HAS_TLS1_3_CLIENT
    	if (ver == TLS1_3_VERSION)
    		return (TLS_client_method());
    #endif
    	if (ver == TLS1_2_VERSION)
    		return (TLSv1_2_client_method());
    	if (ver == TLS1_1_VERSION)
    		return (TLSv1_1_client_method());
    	if (ver == TLS1_VERSION)
    		return (TLSv1_client_method());
    	return (NULL);
    }
    
    const SSL_METHOD *
    SSLv23_client_method(void)
    {
    	return (TLS_client_method());
    }
    
    const SSL_METHOD *
    TLS_client_method(void)
    {
    #ifdef LIBRESSL_HAS_TLS1_3_CLIENT
    	return (&TLS_client_method_data);
    #else
    	return tls_legacy_client_method();
    #endif
    }
    
    const SSL_METHOD *
    tls_legacy_client_method(void)
    {
    	return (&TLS_legacy_client_method_data);
    }
    
    const SSL_METHOD *
    TLSv1_client_method(void)
    {
    	return (&TLSv1_client_method_data);
    }
    
    const SSL_METHOD *
    TLSv1_1_client_method(void)
    {
    	return (&TLSv1_1_client_method_data);
    }
    
    const SSL_METHOD *
    TLSv1_2_client_method(void)
    {
    	return (&TLSv1_2_client_method_data);
    }
    
    static const SSL_METHOD *tls1_get_method(int ver);
    
    #if defined(LIBRESSL_HAS_TLS1_3_CLIENT) && defined(LIBRESSL_HAS_TLS1_3_SERVER)
    static const SSL_METHOD_INTERNAL TLS_method_internal_data = {
    	.version = TLS1_3_VERSION,
    	.min_version = TLS1_VERSION,
    	.max_version = TLS1_3_VERSION,
    	.ssl_new = tls1_new,
    	.ssl_clear = tls1_clear,
    	.ssl_free = tls1_free,
    	.ssl_accept = tls13_legacy_accept,
    	.ssl_connect = tls13_legacy_connect,
    	.ssl_shutdown = tls13_legacy_shutdown,
    	.get_ssl_method = tls1_get_client_method,
    	.ssl_renegotiate = ssl_undefined_function,
    	.ssl_renegotiate_check = ssl_ok,
    	.ssl_pending = tls13_legacy_pending,
    	.ssl_read_bytes = tls13_legacy_read_bytes,
    	.ssl_write_bytes = tls13_legacy_write_bytes,
    	.ssl3_enc = &TLSv1_3_enc_data,
    };
    
    static const SSL_METHOD TLS_method_data = {
    	.ssl_dispatch_alert = ssl3_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = ssl3_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &TLS_method_internal_data,
    };
    #endif
    
    static const SSL_METHOD_INTERNAL TLS_legacy_method_internal_data = {
    	.version = TLS1_2_VERSION,
    	.min_version = TLS1_VERSION,
    	.max_version = TLS1_2_VERSION,
    	.ssl_new = tls1_new,
    	.ssl_clear = tls1_clear,
    	.ssl_free = tls1_free,
    	.ssl_accept = ssl3_accept,
    	.ssl_connect = ssl3_connect,
    	.ssl_shutdown = ssl3_shutdown,
    	.get_ssl_method = tls1_get_method,
    	.ssl_renegotiate = ssl_undefined_function,
    	.ssl_renegotiate_check = ssl_ok,
    	.ssl_pending = ssl3_pending,
    	.ssl_read_bytes = ssl3_read_bytes,
    	.ssl_write_bytes = ssl3_write_bytes,
    	.ssl3_enc = &TLSv1_2_enc_data,
    };
    
    static const SSL_METHOD TLS_legacy_method_data = {
    	.ssl_dispatch_alert = ssl3_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = ssl3_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &TLS_legacy_method_internal_data,
    };
    
    static const SSL_METHOD_INTERNAL TLSv1_method_internal_data = {
    	.version = TLS1_VERSION,
    	.min_version = TLS1_VERSION,
    	.max_version = TLS1_VERSION,
    	.ssl_new = tls1_new,
    	.ssl_clear = tls1_clear,
    	.ssl_free = tls1_free,
    	.ssl_accept = ssl3_accept,
    	.ssl_connect = ssl3_connect,
    	.ssl_shutdown = ssl3_shutdown,
    	.get_ssl_method = tls1_get_method,
    	.ssl_renegotiate = ssl3_renegotiate,
    	.ssl_renegotiate_check = ssl3_renegotiate_check,
    	.ssl_pending = ssl3_pending,
    	.ssl_read_bytes = ssl3_read_bytes,
    	.ssl_write_bytes = ssl3_write_bytes,
    	.ssl3_enc = &TLSv1_enc_data,
    };
    
    static const SSL_METHOD TLSv1_method_data = {
    	.ssl_dispatch_alert = ssl3_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = ssl3_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &TLSv1_method_internal_data,
    };
    
    static const SSL_METHOD_INTERNAL TLSv1_1_method_internal_data = {
    	.version = TLS1_1_VERSION,
    	.min_version = TLS1_1_VERSION,
    	.max_version = TLS1_1_VERSION,
    	.ssl_new = tls1_new,
    	.ssl_clear = tls1_clear,
    	.ssl_free = tls1_free,
    	.ssl_accept = ssl3_accept,
    	.ssl_connect = ssl3_connect,
    	.ssl_shutdown = ssl3_shutdown,
    	.get_ssl_method = tls1_get_method,
    	.ssl_renegotiate = ssl3_renegotiate,
    	.ssl_renegotiate_check = ssl3_renegotiate_check,
    	.ssl_pending = ssl3_pending,
    	.ssl_read_bytes = ssl3_read_bytes,
    	.ssl_write_bytes = ssl3_write_bytes,
    	.ssl3_enc = &TLSv1_1_enc_data,
    };
    
    static const SSL_METHOD TLSv1_1_method_data = {
    	.ssl_dispatch_alert = ssl3_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = ssl3_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &TLSv1_1_method_internal_data,
    };
    
    static const SSL_METHOD_INTERNAL TLSv1_2_method_internal_data = {
    	.version = TLS1_2_VERSION,
    	.min_version = TLS1_2_VERSION,
    	.max_version = TLS1_2_VERSION,
    	.ssl_new = tls1_new,
    	.ssl_clear = tls1_clear,
    	.ssl_free = tls1_free,
    	.ssl_accept = ssl3_accept,
    	.ssl_connect = ssl3_connect,
    	.ssl_shutdown = ssl3_shutdown,
    	.get_ssl_method = tls1_get_method,
    	.ssl_renegotiate = ssl3_renegotiate,
    	.ssl_renegotiate_check = ssl3_renegotiate_check,
    	.ssl_pending = ssl3_pending,
    	.ssl_read_bytes = ssl3_read_bytes,
    	.ssl_write_bytes = ssl3_write_bytes,
    	.ssl3_enc = &TLSv1_2_enc_data,
    };
    
    static const SSL_METHOD TLSv1_2_method_data = {
    	.ssl_dispatch_alert = ssl3_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = ssl3_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &TLSv1_2_method_internal_data,
    };
    
    static const SSL_METHOD *
    tls1_get_method(int ver)
    {
    #if defined(LIBRESSL_HAS_TLS1_3_CLIENT) && defined(LIBRESSL_HAS_TLS1_3_SERVER)
    	if (ver == TLS1_3_VERSION)
    		return (TLS_method());
    #endif
    	if (ver == TLS1_2_VERSION)
    		return (TLSv1_2_method());
    	if (ver == TLS1_1_VERSION)
    		return (TLSv1_1_method());
    	if (ver == TLS1_VERSION)
    		return (TLSv1_method());
    	return (NULL);
    }
    
    const SSL_METHOD *
    SSLv23_method(void)
    {
    	return (TLS_method());
    }
    
    const SSL_METHOD *
    TLS_method(void)
    {
    #if defined(LIBRESSL_HAS_TLS1_3_CLIENT) && defined(LIBRESSL_HAS_TLS1_3_SERVER)
    	return (&TLS_method_data);
    #else
    	return tls_legacy_method();
    #endif
    }
    
    const SSL_METHOD *
    tls_legacy_method(void)
    {
    	return (&TLS_legacy_method_data);
    }
    
    const SSL_METHOD *
    TLSv1_method(void)
    {
    	return (&TLSv1_method_data);
    }
    
    const SSL_METHOD *
    TLSv1_1_method(void)
    {
    	return (&TLSv1_1_method_data);
    }
    
    const SSL_METHOD *
    TLSv1_2_method(void)
    {
    	return (&TLSv1_2_method_data);
    }
    
    #ifdef LIBRESSL_HAS_TLS1_3_SERVER
    static const SSL_METHOD_INTERNAL TLS_server_method_internal_data = {
    	.version = TLS1_3_VERSION,
    	.min_version = TLS1_VERSION,
    	.max_version = TLS1_3_VERSION,
    	.ssl_new = tls1_new,
    	.ssl_clear = tls1_clear,
    	.ssl_free = tls1_free,
    	.ssl_accept = tls13_legacy_accept,
    	.ssl_connect = ssl_undefined_function,
    	.ssl_shutdown = tls13_legacy_shutdown,
    	.get_ssl_method = tls1_get_server_method,
    	.ssl_renegotiate = ssl_undefined_function,
    	.ssl_renegotiate_check = ssl_ok,
    	.ssl_pending = tls13_legacy_pending,
    	.ssl_read_bytes = tls13_legacy_read_bytes,
    	.ssl_write_bytes = tls13_legacy_write_bytes,
    	.ssl3_enc = &TLSv1_3_enc_data,
    };
    
    static const SSL_METHOD TLS_server_method_data = {
    	.ssl_dispatch_alert = ssl3_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = ssl3_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &TLS_server_method_internal_data,
    };
    #endif
    
    static const SSL_METHOD_INTERNAL TLS_legacy_server_method_internal_data = {
    	.version = TLS1_2_VERSION,
    	.min_version = TLS1_VERSION,
    	.max_version = TLS1_2_VERSION,
    	.ssl_new = tls1_new,
    	.ssl_clear = tls1_clear,
    	.ssl_free = tls1_free,
    	.ssl_accept = ssl3_accept,
    	.ssl_connect = ssl_undefined_function,
    	.ssl_shutdown = ssl3_shutdown,
    	.get_ssl_method = tls1_get_server_method,
    	.ssl_renegotiate = ssl_undefined_function,
    	.ssl_renegotiate_check = ssl_ok,
    	.ssl_pending = ssl3_pending,
    	.ssl_read_bytes = ssl3_read_bytes,
    	.ssl_write_bytes = ssl3_write_bytes,
    	.ssl3_enc = &TLSv1_2_enc_data,
    };
    
    static const SSL_METHOD TLS_legacy_server_method_data = {
    	.ssl_dispatch_alert = ssl3_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = ssl3_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &TLS_legacy_server_method_internal_data,
    };
    
    static const SSL_METHOD_INTERNAL TLSv1_server_method_internal_data = {
    	.version = TLS1_VERSION,
    	.min_version = TLS1_VERSION,
    	.max_version = TLS1_VERSION,
    	.ssl_new = tls1_new,
    	.ssl_clear = tls1_clear,
    	.ssl_free = tls1_free,
    	.ssl_accept = ssl3_accept,
    	.ssl_connect = ssl_undefined_function,
    	.ssl_shutdown = ssl3_shutdown,
    	.get_ssl_method = tls1_get_server_method,
    	.ssl_renegotiate = ssl3_renegotiate,
    	.ssl_renegotiate_check = ssl3_renegotiate_check,
    	.ssl_pending = ssl3_pending,
    	.ssl_read_bytes = ssl3_read_bytes,
    	.ssl_write_bytes = ssl3_write_bytes,
    	.ssl3_enc = &TLSv1_enc_data,
    };
    
    static const SSL_METHOD TLSv1_server_method_data = {
    	.ssl_dispatch_alert = ssl3_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = ssl3_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &TLSv1_server_method_internal_data,
    };
    
    static const SSL_METHOD_INTERNAL TLSv1_1_server_method_internal_data = {
    	.version = TLS1_1_VERSION,
    	.min_version = TLS1_1_VERSION,
    	.max_version = TLS1_1_VERSION,
    	.ssl_new = tls1_new,
    	.ssl_clear = tls1_clear,
    	.ssl_free = tls1_free,
    	.ssl_accept = ssl3_accept,
    	.ssl_connect = ssl_undefined_function,
    	.ssl_shutdown = ssl3_shutdown,
    	.get_ssl_method = tls1_get_server_method,
    	.ssl_renegotiate = ssl3_renegotiate,
    	.ssl_renegotiate_check = ssl3_renegotiate_check,
    	.ssl_pending = ssl3_pending,
    	.ssl_read_bytes = ssl3_read_bytes,
    	.ssl_write_bytes = ssl3_write_bytes,
    	.ssl3_enc = &TLSv1_1_enc_data,
    };
    
    static const SSL_METHOD TLSv1_1_server_method_data = {
    	.ssl_dispatch_alert = ssl3_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = ssl3_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &TLSv1_1_server_method_internal_data,
    };
    
    static const SSL_METHOD_INTERNAL TLSv1_2_server_method_internal_data = {
    	.version = TLS1_2_VERSION,
    	.min_version = TLS1_2_VERSION,
    	.max_version = TLS1_2_VERSION,
    	.ssl_new = tls1_new,
    	.ssl_clear = tls1_clear,
    	.ssl_free = tls1_free,
    	.ssl_accept = ssl3_accept,
    	.ssl_connect = ssl_undefined_function,
    	.ssl_shutdown = ssl3_shutdown,
    	.get_ssl_method = tls1_get_server_method,
    	.ssl_renegotiate = ssl3_renegotiate,
    	.ssl_renegotiate_check = ssl3_renegotiate_check,
    	.ssl_pending = ssl3_pending,
    	.ssl_read_bytes = ssl3_read_bytes,
    	.ssl_write_bytes = ssl3_write_bytes,
    	.ssl3_enc = &TLSv1_2_enc_data,
    };
    
    static const SSL_METHOD TLSv1_2_server_method_data = {
    	.ssl_dispatch_alert = ssl3_dispatch_alert,
    	.num_ciphers = ssl3_num_ciphers,
    	.get_cipher = ssl3_get_cipher,
    	.get_cipher_by_char = ssl3_get_cipher_by_char,
    	.put_cipher_by_char = ssl3_put_cipher_by_char,
    	.internal = &TLSv1_2_server_method_internal_data,
    };
    
    const SSL_METHOD *
    tls1_get_server_method(int ver)
    {
    #ifdef LIBRESSL_HAS_TLS1_3_SERVER
    	if (ver == TLS1_3_VERSION)
    		return (TLS_server_method());
    #endif
    	if (ver == TLS1_2_VERSION)
    		return (TLSv1_2_server_method());
    	if (ver == TLS1_1_VERSION)
    		return (TLSv1_1_server_method());
    	if (ver == TLS1_VERSION)
    		return (TLSv1_server_method());
    	return (NULL);
    }
    
    const SSL_METHOD *
    SSLv23_server_method(void)
    {
    	return (TLS_server_method());
    }
    
    const SSL_METHOD *
    TLS_server_method(void)
    {
    #ifdef LIBRESSL_HAS_TLS1_3_SERVER
    	return (&TLS_server_method_data);
    #else
    	return tls_legacy_server_method();
    #endif
    }
    
    const SSL_METHOD *
    tls_legacy_server_method(void)
    {
    	return (&TLS_legacy_server_method_data);
    }
    
    const SSL_METHOD *
    TLSv1_server_method(void)
    {
    	return (&TLSv1_server_method_data);
    }
    
    const SSL_METHOD *
    TLSv1_1_server_method(void)
    {
    	return (&TLSv1_1_server_method_data);
    }
    
    const SSL_METHOD *
    TLSv1_2_server_method(void)
    {
    	return (&TLSv1_2_server_method_data);
    }