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/*
* Copyright (C) 2009 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "gcrypt_plugin.h"
#include "gcrypt_hasher.h"
#include "gcrypt_crypter.h"
#include "gcrypt_rng.h"
#include "gcrypt_dh.h"
#include "gcrypt_rsa_private_key.h"
#include "gcrypt_rsa_public_key.h"
#include <library.h>
#include <debug.h>
#include <threading/mutex.h>
#include <errno.h>
#include <gcrypt.h>
typedef struct private_gcrypt_plugin_t private_gcrypt_plugin_t;
/**
* private data of gcrypt_plugin
*/
struct private_gcrypt_plugin_t {
/**
* public functions
*/
gcrypt_plugin_t public;
};
/**
* gcrypt mutex initialization wrapper
*/
static int mutex_init(void **lock)
{
*lock = mutex_create(MUTEX_TYPE_DEFAULT);
return 0;
}
/**
* gcrypt mutex cleanup wrapper
*/
static int mutex_destroy(void **lock)
{
mutex_t *mutex = *lock;
mutex->destroy(mutex);
return 0;
}
/**
* gcrypt mutex lock wrapper
*/
static int mutex_lock(void **lock)
{
mutex_t *mutex = *lock;
mutex->lock(mutex);
return 0;
}
/**
* gcrypt mutex unlock wrapper
*/
static int mutex_unlock(void **lock)
{
mutex_t *mutex = *lock;
mutex->unlock(mutex);
return 0;
}
/**
* gcrypt locking functions using our mutex_t
*/
static struct gcry_thread_cbs thread_functions = {
GCRY_THREAD_OPTION_USER, NULL,
mutex_init, mutex_destroy, mutex_lock, mutex_unlock,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
};
/**
* Implementation of gcrypt_plugin_t.destroy
*/
static void destroy(private_gcrypt_plugin_t *this)
{
lib->crypto->remove_hasher(lib->crypto,
(hasher_constructor_t)gcrypt_hasher_create);
lib->crypto->remove_crypter(lib->crypto,
(crypter_constructor_t)gcrypt_crypter_create);
lib->crypto->remove_rng(lib->crypto,
(rng_constructor_t)gcrypt_rng_create);
lib->crypto->remove_dh(lib->crypto,
(dh_constructor_t)gcrypt_dh_create);
lib->creds->remove_builder(lib->creds,
(builder_function_t)gcrypt_rsa_private_key_gen);
lib->creds->remove_builder(lib->creds,
(builder_function_t)gcrypt_rsa_private_key_load);
lib->creds->remove_builder(lib->creds,
(builder_function_t)gcrypt_rsa_public_key_load);
free(this);
}
/*
* see header file
*/
plugin_t *plugin_create()
{
private_gcrypt_plugin_t *this;
gcry_control(GCRYCTL_SET_THREAD_CBS, &thread_functions);
if (!gcry_check_version(GCRYPT_VERSION))
{
DBG1("libgcrypt version mismatch");
return NULL;
}
/* we currently do not use secure memory */
gcry_control(GCRYCTL_DISABLE_SECMEM, 0);
if (lib->settings->get_bool(lib->settings,
"libstrongswan.plugins.gcrypt.quick_random", FALSE))
{
gcry_control(GCRYCTL_ENABLE_QUICK_RANDOM, 0);
}
gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
this = malloc_thing(private_gcrypt_plugin_t);
this->public.plugin.destroy = (void(*)(plugin_t*))destroy;
/* hashers */
lib->crypto->add_hasher(lib->crypto, HASH_SHA1,
(hasher_constructor_t)gcrypt_hasher_create);
lib->crypto->add_hasher(lib->crypto, HASH_MD4,
(hasher_constructor_t)gcrypt_hasher_create);
lib->crypto->add_hasher(lib->crypto, HASH_MD5,
(hasher_constructor_t)gcrypt_hasher_create);
lib->crypto->add_hasher(lib->crypto, HASH_SHA224,
(hasher_constructor_t)gcrypt_hasher_create);
lib->crypto->add_hasher(lib->crypto, HASH_SHA256,
(hasher_constructor_t)gcrypt_hasher_create);
lib->crypto->add_hasher(lib->crypto, HASH_SHA384,
(hasher_constructor_t)gcrypt_hasher_create);
lib->crypto->add_hasher(lib->crypto, HASH_SHA512,
(hasher_constructor_t)gcrypt_hasher_create);
/* crypters */
lib->crypto->add_crypter(lib->crypto, ENCR_3DES,
(crypter_constructor_t)gcrypt_crypter_create);
lib->crypto->add_crypter(lib->crypto, ENCR_CAST,
(crypter_constructor_t)gcrypt_crypter_create);
lib->crypto->add_crypter(lib->crypto, ENCR_BLOWFISH,
(crypter_constructor_t)gcrypt_crypter_create);
lib->crypto->add_crypter(lib->crypto, ENCR_DES,
(crypter_constructor_t)gcrypt_crypter_create);
lib->crypto->add_crypter(lib->crypto, ENCR_DES_ECB,
(crypter_constructor_t)gcrypt_crypter_create);
lib->crypto->add_crypter(lib->crypto, ENCR_AES_CBC,
(crypter_constructor_t)gcrypt_crypter_create);
lib->crypto->add_crypter(lib->crypto, ENCR_CAMELLIA_CBC,
(crypter_constructor_t)gcrypt_crypter_create);
lib->crypto->add_crypter(lib->crypto, ENCR_SERPENT_CBC,
(crypter_constructor_t)gcrypt_crypter_create);
lib->crypto->add_crypter(lib->crypto, ENCR_TWOFISH_CBC,
(crypter_constructor_t)gcrypt_crypter_create);
/* random numbers */
lib->crypto->add_rng(lib->crypto, RNG_WEAK,
(rng_constructor_t)gcrypt_rng_create);
lib->crypto->add_rng(lib->crypto, RNG_STRONG,
(rng_constructor_t)gcrypt_rng_create);
lib->crypto->add_rng(lib->crypto, RNG_TRUE,
(rng_constructor_t)gcrypt_rng_create);
/* diffie hellman groups, using modp */
lib->crypto->add_dh(lib->crypto, MODP_2048_BIT,
(dh_constructor_t)gcrypt_dh_create);
lib->crypto->add_dh(lib->crypto, MODP_1536_BIT,
(dh_constructor_t)gcrypt_dh_create);
lib->crypto->add_dh(lib->crypto, MODP_3072_BIT,
(dh_constructor_t)gcrypt_dh_create);
lib->crypto->add_dh(lib->crypto, MODP_4096_BIT,
(dh_constructor_t)gcrypt_dh_create);
lib->crypto->add_dh(lib->crypto, MODP_6144_BIT,
(dh_constructor_t)gcrypt_dh_create);
lib->crypto->add_dh(lib->crypto, MODP_8192_BIT,
(dh_constructor_t)gcrypt_dh_create);
lib->crypto->add_dh(lib->crypto, MODP_1024_BIT,
(dh_constructor_t)gcrypt_dh_create);
lib->crypto->add_dh(lib->crypto, MODP_768_BIT,
(dh_constructor_t)gcrypt_dh_create);
/* RSA */
lib->creds->add_builder(lib->creds, CRED_PRIVATE_KEY, KEY_RSA,
(builder_function_t)gcrypt_rsa_private_key_gen);
lib->creds->add_builder(lib->creds, CRED_PRIVATE_KEY, KEY_RSA,
(builder_function_t)gcrypt_rsa_private_key_load);
lib->creds->add_builder(lib->creds, CRED_PUBLIC_KEY, KEY_RSA,
(builder_function_t)gcrypt_rsa_public_key_load);
return &this->public.plugin;
}
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