/*
 * 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.
 */

/**
 * @defgroup crypto_tester crypto_tester
 * @{ @ingroup crypto
 */

#ifndef CRYPTO_TESTER_H_
#define CRYPTO_TESTER_H_

typedef struct crypto_tester_t crypto_tester_t;

#include <crypto/crypto_factory.h>

typedef struct crypter_test_vector_t crypter_test_vector_t;
typedef struct signer_test_vector_t signer_test_vector_t;
typedef struct hasher_test_vector_t hasher_test_vector_t;
typedef struct prf_test_vector_t prf_test_vector_t;
typedef struct rng_test_vector_t rng_test_vector_t;

struct crypter_test_vector_t {
	/** encryption algorithm this vector tests */
	encryption_algorithm_t alg;
	/** key length to use, in bytes */
	size_t key_size;
	/** encryption key of test vector */
	u_char *key;
	/** initialization vector, using crypters blocksize bytes */
	u_char *iv;
	/** length of plain and cipher text */
	size_t len;
	/** plain text */
	u_char *plain;
	/** cipher text */
	u_char *cipher;
};

struct signer_test_vector_t {
	/** signer algorithm this test vector tests */
	pseudo_random_function_t alg;
	/** key to use, with a length the algorithm expects */
	u_char *key;
	/** size of the input data */
	size_t len;
	/** input data */
	u_char *data;
	/** expected output, with ouput size of the tested algorithm */
	u_char *mac;
};

struct hasher_test_vector_t {
	/** hash algorithm this test vector tests */
	hash_algorithm_t alg;
	/** length of the input data */
	size_t len;
	/** input data */
	u_char *data;
	/** expected hash, with hash size of the tested algorithm */
	u_char *hash;
};

struct prf_test_vector_t {
	/** prf algorithm this test vector tests */
	pseudo_random_function_t alg;
	/** is this PRF stateful? */
	bool stateful;
	/** key length to use, in bytes */
	size_t key_size;
	/** key to use */
	u_char *key;
	/** size of the seed data */
	size_t len;
	/** seed data */
	u_char *seed;
	/** expected output, with block size of the tested algorithm */
	u_char *out;
};

/**
 * Test vector for a RNG.
 *
 * Contains a callback function to analyze the output of a RNG,
 */
struct rng_test_vector_t {
	/** quality of random data this test vector tests */
	rng_quality_t quality;
	/** callback function to test RNG output, returns TRUE if data ok */
	bool (*test)(void *user, chunk_t data);
	/** number of bytes the function requests */
	size_t len;
	/** user data passed back to the test() function on invocation */
	void *user;
};

/**
 * Cryptographic primitive testing framework.
 */
struct crypto_tester_t {
	
	/**
	 * Test a crypter algorithm, optionally using a specified key size.
	 *
	 * @param alg			algorithm to test
	 * @param key_size		key size to test, 0 for all 
	 * @param create		constructor function for the crypter
	 * @return				TRUE if test passed
	 */
	bool (*test_crypter)(crypto_tester_t *this, encryption_algorithm_t alg,
						 size_t key_size, crypter_constructor_t create);
	/**
	 * Test a signer algorithm.
	 *
	 * @param alg			algorithm to test
	 * @param create		constructor function for the signer
	 * @return				TRUE if test passed
	 */
	bool (*test_signer)(crypto_tester_t *this, integrity_algorithm_t alg,
						signer_constructor_t create);
	/**
	 * Test a hasher algorithm.
	 *
	 * @param alg			algorithm to test
	 * @param create		constructor function for the hasher
	 * @return				TRUE if test passed
	 */
	bool (*test_hasher)(crypto_tester_t *this, hash_algorithm_t alg,
						hasher_constructor_t create);
	/**
	 * Test a PRF algorithm.
	 *
	 * @param alg			algorithm to test
	 * @param create		constructor function for the PRF
	 * @return				TRUE if test passed
	 */
	bool (*test_prf)(crypto_tester_t *this, pseudo_random_function_t alg,
					 prf_constructor_t create);
	/**
	 * Test a RNG implementation.
	 *
	 * @param alg			algorithm to test
	 * @param create		constructor function for the RNG
	 * @return				TRUE if test passed
	 */
	bool (*test_rng)(crypto_tester_t *this, rng_quality_t quality,
					 rng_constructor_t create);
	/**
	 * Add a test vector to test a crypter.
	 *
	 * @param vector		pointer to test vector
	 */
	void (*add_crypter_vector)(crypto_tester_t *this,
							   crypter_test_vector_t *vector);
	/**
	 * Add a test vector to test a signer.
	 *
	 * @param vector		pointer to test vector
	 */
	void (*add_signer_vector)(crypto_tester_t *this,
							  signer_test_vector_t *vector);
	/**
	 * Add a test vector to test a hasher.
	 *
	 * @param vector		pointer to test vector
	 */
	void (*add_hasher_vector)(crypto_tester_t *this,
							  hasher_test_vector_t *vector);
	/**
	 * Add a test vector to test a PRF.
	 *
	 * @param vector		pointer to test vector
	 */
	void (*add_prf_vector)(crypto_tester_t *this, prf_test_vector_t *vector);
	
	/**
	 * Add a test vector to test a RNG.
	 *
	 * @param vector		pointer to test vector
	 */
	void (*add_rng_vector)(crypto_tester_t *this, rng_test_vector_t *vector);
	
	/**
	 * Destroy a crypto_tester_t.
	 */
	void (*destroy)(crypto_tester_t *this);
};

/**
 * Create a crypto_tester instance.
 */
crypto_tester_t *crypto_tester_create();

#endif /* CRYPTO_TESTER_ @}*/