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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 <utils/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
};
METHOD(plugin_t, get_name, char*,
private_gcrypt_plugin_t *this)
{
return "gcrypt";
}
METHOD(plugin_t, get_features, int,
private_gcrypt_plugin_t *this, plugin_feature_t *features[])
{
static plugin_feature_t f[] = {
/* crypters */
PLUGIN_REGISTER(CRYPTER, gcrypt_crypter_create),
PLUGIN_PROVIDE(CRYPTER, ENCR_AES_CTR, 16),
PLUGIN_PROVIDE(CRYPTER, ENCR_AES_CTR, 24),
PLUGIN_PROVIDE(CRYPTER, ENCR_AES_CTR, 32),
PLUGIN_PROVIDE(CRYPTER, ENCR_AES_CBC, 16),
PLUGIN_PROVIDE(CRYPTER, ENCR_AES_CBC, 24),
PLUGIN_PROVIDE(CRYPTER, ENCR_AES_CBC, 32),
/* gcrypt only supports 128 bit blowfish */
PLUGIN_PROVIDE(CRYPTER, ENCR_BLOWFISH, 16),
#ifdef HAVE_GCRY_CIPHER_CAMELLIA
PLUGIN_PROVIDE(CRYPTER, ENCR_CAMELLIA_CTR, 16),
PLUGIN_PROVIDE(CRYPTER, ENCR_CAMELLIA_CTR, 24),
PLUGIN_PROVIDE(CRYPTER, ENCR_CAMELLIA_CTR, 32),
PLUGIN_PROVIDE(CRYPTER, ENCR_CAMELLIA_CBC, 16),
PLUGIN_PROVIDE(CRYPTER, ENCR_CAMELLIA_CBC, 24),
PLUGIN_PROVIDE(CRYPTER, ENCR_CAMELLIA_CBC, 32),
#endif
PLUGIN_PROVIDE(CRYPTER, ENCR_CAST, 0),
PLUGIN_PROVIDE(CRYPTER, ENCR_3DES, 24),
PLUGIN_PROVIDE(CRYPTER, ENCR_DES, 8),
PLUGIN_PROVIDE(CRYPTER, ENCR_DES_ECB, 8),
PLUGIN_PROVIDE(CRYPTER, ENCR_SERPENT_CBC, 16),
PLUGIN_PROVIDE(CRYPTER, ENCR_SERPENT_CBC, 24),
PLUGIN_PROVIDE(CRYPTER, ENCR_SERPENT_CBC, 32),
PLUGIN_PROVIDE(CRYPTER, ENCR_TWOFISH_CBC, 16),
PLUGIN_PROVIDE(CRYPTER, ENCR_TWOFISH_CBC, 32),
/* hashers */
PLUGIN_REGISTER(HASHER, gcrypt_hasher_create),
PLUGIN_PROVIDE(HASHER, HASH_SHA1),
PLUGIN_PROVIDE(HASHER, HASH_MD4),
PLUGIN_PROVIDE(HASHER, HASH_MD5),
PLUGIN_PROVIDE(HASHER, HASH_SHA224),
PLUGIN_PROVIDE(HASHER, HASH_SHA256),
PLUGIN_PROVIDE(HASHER, HASH_SHA384),
PLUGIN_PROVIDE(HASHER, HASH_SHA512),
/* MODP DH groups */
PLUGIN_REGISTER(DH, gcrypt_dh_create),
PLUGIN_PROVIDE(DH, MODP_2048_BIT),
PLUGIN_PROVIDE(DH, MODP_2048_224),
PLUGIN_PROVIDE(DH, MODP_2048_256),
PLUGIN_PROVIDE(DH, MODP_1536_BIT),
PLUGIN_PROVIDE(DH, MODP_3072_BIT),
PLUGIN_PROVIDE(DH, MODP_4096_BIT),
PLUGIN_PROVIDE(DH, MODP_6144_BIT),
PLUGIN_PROVIDE(DH, MODP_8192_BIT),
PLUGIN_PROVIDE(DH, MODP_1024_BIT),
PLUGIN_PROVIDE(DH, MODP_1024_160),
PLUGIN_PROVIDE(DH, MODP_768_BIT),
PLUGIN_REGISTER(DH, gcrypt_dh_create_custom),
PLUGIN_PROVIDE(DH, MODP_CUSTOM),
/* RSA private/public key loading */
PLUGIN_REGISTER(PUBKEY, gcrypt_rsa_public_key_load, TRUE),
PLUGIN_PROVIDE(PUBKEY, KEY_RSA),
PLUGIN_REGISTER(PRIVKEY, gcrypt_rsa_private_key_load, TRUE),
PLUGIN_PROVIDE(PRIVKEY, KEY_RSA),
PLUGIN_REGISTER(PRIVKEY_GEN, gcrypt_rsa_private_key_gen, FALSE),
PLUGIN_PROVIDE(PRIVKEY_GEN, KEY_RSA),
/* random numbers */
PLUGIN_REGISTER(RNG, gcrypt_rng_create),
PLUGIN_PROVIDE(RNG, RNG_WEAK),
PLUGIN_PROVIDE(RNG, RNG_STRONG),
PLUGIN_PROVIDE(RNG, RNG_TRUE),
};
*features = f;
return countof(f);
}
METHOD(plugin_t, destroy, void,
private_gcrypt_plugin_t *this)
{
free(this);
}
/*
* see header file
*/
plugin_t *gcrypt_plugin_create()
{
private_gcrypt_plugin_t *this;
gcry_control(GCRYCTL_SET_THREAD_CBS, &thread_functions);
if (!gcry_check_version(GCRYPT_VERSION))
{
DBG1(DBG_LIB, "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);
INIT(this,
.public = {
.plugin = {
.get_name = _get_name,
.get_features = _get_features,
.destroy = _destroy,
},
},
);
return &this->public.plugin;
}
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