- Updated to new upstream.

1 files changed, 235 insertions, 0 deletions

diff --git a/src/libstrongswan/crypto/crypto_factory.h b/src/libstrongswan/crypto/crypto_factory.h
new file mode 100644
index 000000000..6bf070c31
--- /dev/null
+++ b/src/libstrongswan/crypto/crypto_factory.h
@@ -0,0 +1,235 @@
+/*
+ * Copyright (C) 2008 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_factory crypto_factory
+ * @{ @ingroup crypto
+ */
+
+#ifndef CRYPTO_FACTORY_H_
+#define CRYPTO_FACTORY_H_
+
+typedef struct crypto_factory_t crypto_factory_t;
+
+#include <library.h>
+#include <crypto/crypters/crypter.h>
+#include <crypto/signers/signer.h>
+#include <crypto/hashers/hasher.h>
+#include <crypto/prfs/prf.h>
+#include <crypto/rngs/rng.h>
+#include <crypto/diffie_hellman.h>
+
+/**
+ * Constructor function for crypters
+ */
+typedef crypter_t* (*crypter_constructor_t)(encryption_algorithm_t algo,
+											size_t key_size);
+/**
+ * Constructor function for signers
+ */
+typedef signer_t* (*signer_constructor_t)(integrity_algorithm_t algo);
+
+/**
+ * Constructor function for hashers
+ */
+typedef hasher_t* (*hasher_constructor_t)(hash_algorithm_t algo);
+
+/**
+ * Constructor function for pseudo random functions
+ */
+typedef prf_t* (*prf_constructor_t)(pseudo_random_function_t algo);
+
+/**
+ * Constructor function for source of randomness
+ */
+typedef rng_t* (*rng_constructor_t)(rng_quality_t quality);
+
+/**
+ * Constructor function for diffie hellman
+ */
+typedef diffie_hellman_t* (*dh_constructor_t)(diffie_hellman_group_t group);
+
+/**
+ * Handles crypto modules and creates instances.
+ */
+struct crypto_factory_t {
+
+	/**
+	 * Create a crypter instance.
+	 *
+	 * @param algo			encryption algorithm
+	 * @param key_size		length of the key in bytes
+	 * @return				crypter_t instance, NULL if not supported
+	 */
+	crypter_t* (*create_crypter)(crypto_factory_t *this,
+								 encryption_algorithm_t algo, size_t key_size);
+	
+	/**
+	 * Create a symmetric signer instance.
+	 *
+	 * @param algo			MAC algorithm to use
+	 * @return				signer_t instance, NULL if not supported
+	 */
+	signer_t* (*create_signer)(crypto_factory_t *this,
+							   integrity_algorithm_t algo);
+
+	/**
+	 * Create a hasher instance.
+	 *
+	 * @param algo			hash algorithm
+	 * @return				hasher_t instance, NULL if not supported
+	 */
+	hasher_t* (*create_hasher)(crypto_factory_t *this, hash_algorithm_t algo);
+	
+	/**
+	 * Create a pseudo random function instance.
+	 *
+	 * @param algo			PRF algorithm to use
+	 * @return				prf_t instance, NULL if not supported
+	 */
+	prf_t* (*create_prf)(crypto_factory_t *this, pseudo_random_function_t algo);
+	
+	/**
+	 * Create a source of randomness.
+	 *
+	 * @param quality		required randomness quality
+	 * @return				rng_t instance, NULL if no RNG with such a quality
+	 */
+	rng_t* (*create_rng)(crypto_factory_t *this, rng_quality_t quality);
+	
+	/**
+	 * Create a diffie hellman instance.
+	 *
+	 * @param group			diffie hellman group
+	 * @return				diffie_hellman_t instance, NULL if not supported
+	 */
+	diffie_hellman_t* (*create_dh)(crypto_factory_t *this,
+								   diffie_hellman_group_t group);
+	
+	/**
+	 * Register a crypter constructor.
+	 *
+	 * @param algo			algorithm to constructor
+	 * @param create		constructor function for that algorithm
+	 * @return
+	 */
+	void (*add_crypter)(crypto_factory_t *this, encryption_algorithm_t algo,
+						crypter_constructor_t create);
+	
+	/**
+	 * Unregister a crypter constructor.
+	 *
+	 * @param create		constructor function to unregister
+	 */
+	void (*remove_crypter)(crypto_factory_t *this, crypter_constructor_t create);
+	
+	/**
+	 * Register a signer constructor.
+	 *
+	 * @param algo			algorithm to constructor
+	 * @param create		constructor function for that algorithm
+	 * @return
+	 */
+	void (*add_signer)(crypto_factory_t *this, integrity_algorithm_t algo,
+					   signer_constructor_t create);
+	
+	/**
+	 * Unregister a signer constructor.
+	 *
+	 * @param create		constructor function to unregister
+	 */
+	void (*remove_signer)(crypto_factory_t *this, signer_constructor_t create);
+	
+	/**
+	 * Register a hasher constructor.
+	 *
+	 * The first added hasher is the preferred hasher returned on
+	 * create_hasher(HASH_PREFERRED).
+	 *
+	 * @param algo			algorithm to constructor
+	 * @param create		constructor function for that algorithm
+	 * @return
+	 */
+	void (*add_hasher)(crypto_factory_t *this, hash_algorithm_t algo,
+					   hasher_constructor_t create);
+	
+	/**
+	 * Unregister a hasher constructor.
+	 *
+	 * @param create		constructor function to unregister
+	 */
+	void (*remove_hasher)(crypto_factory_t *this, hasher_constructor_t create);
+	
+	/**
+	 * Register a prf constructor.
+	 *
+	 * @param algo			algorithm to constructor
+	 * @param create		constructor function for that algorithm
+	 * @return
+	 */
+	void (*add_prf)(crypto_factory_t *this, pseudo_random_function_t algo,
+					prf_constructor_t create);
+	
+	/**
+	 * Unregister a prf constructor.
+	 *
+	 * @param create		constructor function to unregister
+	 */
+	void (*remove_prf)(crypto_factory_t *this, prf_constructor_t create);
+	
+	/**
+	 * Register a source of randomness.
+	 *
+	 * @param quality		quality of randomness this RNG serves
+	 * @param create		constructor function for such a quality
+	 */
+	void (*add_rng)(crypto_factory_t *this, rng_quality_t quality, rng_constructor_t create);
+	
+	/**
+	 * Unregister a source of randomness.
+	 *
+	 * @param create		constructor function to unregister
+	 */
+	void (*remove_rng)(crypto_factory_t *this, rng_constructor_t create);
+	
+	/**
+	 * Register a diffie hellman constructor.
+	 *
+	 * @param group			dh group to constructor
+	 * @param create		constructor function for that algorithm
+	 * @return
+	 */
+	void (*add_dh)(crypto_factory_t *this, diffie_hellman_group_t group,
+				   dh_constructor_t create);
+	
+	/**
+	 * Unregister a diffie hellman constructor.
+	 *
+	 * @param create		constructor function to unregister
+	 */
+	void (*remove_dh)(crypto_factory_t *this, dh_constructor_t create);
+	
+	/**
+     * Destroy a crypto_factory instance.
+     */
+    void (*destroy)(crypto_factory_t *this);
+};
+
+/**
+ * Create a crypto_factory instance.
+ */
+crypto_factory_t *crypto_factory_create();
+
+#endif /* CRYPTO_FACTORY_H_ @}*/