# This file is dual licensed under the terms of the Apache License, Version
# 2.0, and the BSD License. See the LICENSE file in the root of this repository
# for complete details.

from __future__ import annotations

INCLUDES = """
#if !defined(OPENSSL_NO_ENGINE) || CRYPTOGRAPHY_IS_LIBRESSL
#include <openssl/engine.h>
#endif
"""

TYPES = """
typedef ... ENGINE;
typedef ... UI_METHOD;

static const long Cryptography_HAS_ENGINE;
"""

FUNCTIONS = """
ENGINE *ENGINE_by_id(const char *);
int ENGINE_init(ENGINE *);
int ENGINE_finish(ENGINE *);
ENGINE *ENGINE_get_default_RAND(void);
int ENGINE_set_default_RAND(ENGINE *);
void ENGINE_unregister_RAND(ENGINE *);
int ENGINE_ctrl_cmd(ENGINE *, const char *, long, void *, void (*)(void), int);
int ENGINE_free(ENGINE *);
const char *ENGINE_get_name(const ENGINE *);

// These bindings are unused by cryptography or pyOpenSSL but are present
// for advanced users who need them.
int ENGINE_ctrl_cmd_string(ENGINE *, const char *, const char *, int);
void ENGINE_load_builtin_engines(void);
EVP_PKEY *ENGINE_load_private_key(ENGINE *, const char *, UI_METHOD *, void *);
EVP_PKEY *ENGINE_load_public_key(ENGINE *, const char *, UI_METHOD *, void *);
"""

CUSTOMIZATIONS = """
#ifdef OPENSSL_NO_ENGINE
static const long Cryptography_HAS_ENGINE = 0;

#if CRYPTOGRAPHY_IS_BORINGSSL
typedef void UI_METHOD;
#endif

/* Despite being OPENSSL_NO_ENGINE, BoringSSL/LibreSSL define these symbols. */
#if !CRYPTOGRAPHY_IS_BORINGSSL && !CRYPTOGRAPHY_IS_LIBRESSL
int (*ENGINE_free)(ENGINE *) = NULL;
void (*ENGINE_load_builtin_engines)(void) = NULL;
#endif

ENGINE *(*ENGINE_get_default_RAND)(void) = NULL;
int (*ENGINE_set_default_RAND)(ENGINE *) = NULL;
void (*ENGINE_unregister_RAND)(ENGINE *) = NULL;

#if !CRYPTOGRAPHY_IS_LIBRESSL
ENGINE *(*ENGINE_by_id)(const char *) = NULL;
int (*ENGINE_init)(ENGINE *) = NULL;
int (*ENGINE_finish)(ENGINE *) = NULL;
int (*ENGINE_ctrl_cmd)(ENGINE *, const char *, long, void *,
                       void (*)(void), int) = NULL;

const char *(*ENGINE_get_id)(const ENGINE *) = NULL;
const char *(*ENGINE_get_name)(const ENGINE *) = NULL;

int (*ENGINE_ctrl_cmd_string)(ENGINE *, const char *, const char *,
                              int) = NULL;
EVP_PKEY *(*ENGINE_load_private_key)(ENGINE *, const char *, UI_METHOD *,
                                     void *) = NULL;
EVP_PKEY *(*ENGINE_load_public_key)(ENGINE *, const char *,
                                    UI_METHOD *, void *) = NULL;
#endif

#else
static const long Cryptography_HAS_ENGINE = 1;
#endif
"""
