132 lines
3.5 KiB
C
132 lines
3.5 KiB
C
/*
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* Copyright (C) 2005-2006 Martin Willi
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* Copyright (C) 2005 Jan Hutter
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* $Id$
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*/
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/**
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* @defgroup crypter crypter
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* @{ @ingroup crypto
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*/
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#ifndef CRYPTER_H_
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#define CRYPTER_H_
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typedef enum encryption_algorithm_t encryption_algorithm_t;
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typedef struct crypter_t crypter_t;
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#include <library.h>
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/**
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* Encryption algorithm, as in IKEv2 RFC 3.3.2.
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*/
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enum encryption_algorithm_t {
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ENCR_UNDEFINED = 1024,
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ENCR_DES_IV64 = 1,
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ENCR_DES = 2,
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ENCR_3DES = 3,
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ENCR_RC5 = 4,
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ENCR_IDEA = 5,
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ENCR_CAST = 6,
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ENCR_BLOWFISH = 7,
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ENCR_3IDEA = 8,
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ENCR_DES_IV32 = 9,
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ENCR_NULL = 11,
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ENCR_AES_CBC = 12,
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ENCR_AES_CTR = 13,
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ENCR_AES_CCM_ICV8 = 14,
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ENCR_AES_CCM_ICV12 = 15,
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ENCR_AES_CCM_ICV16 = 16,
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ENCR_AES_GCM_ICV8 = 18,
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ENCR_AES_GCM_ICV12 = 19,
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ENCR_AES_GCM_ICV16 = 20,
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ENCR_NULL_AUTH_AES_GMAC = 21,
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ENCR_CAMELLIA_CBC = 23,
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ENCR_CAMELLIA_CTR = 24,
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ENCR_CAMELLIA_CCM_ICV8 = 25,
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ENCR_CAMELLIA_CCM_ICV12 = 26,
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ENCR_CAMELLIA_CCM_ICV16 = 27,
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ENCR_DES_ECB = 1025
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};
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/**
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* enum name for encryption_algorithm_t.
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*/
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extern enum_name_t *encryption_algorithm_names;
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/**
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* Generic interface for symmetric encryption algorithms.
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*/
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struct crypter_t {
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/**
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* Encrypt a chunk of data and allocate space for the encrypted value.
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*
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* The length of the iv must equal to get_block_size(), while the length
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* of data must be a multiple it.
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* If encrypted is NULL, the encryption is done in-place (overwriting data).
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*
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* @param data data to encrypt
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* @param iv initializing vector
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* @param encrypted chunk to allocate encrypted data, or NULL
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*/
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void (*encrypt) (crypter_t *this, chunk_t data, chunk_t iv,
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chunk_t *encrypted);
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/**
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* Decrypt a chunk of data and allocate space for the decrypted value.
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*
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* The length of the iv must equal to get_block_size(), while the length
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* of data must be a multiple it.
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* If decrpyted is NULL, the encryption is done in-place (overwriting data).
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*
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* @param data data to decrypt
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* @param iv initializing vector
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* @param encrypted chunk to allocate decrypted data, or NULL
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*/
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void (*decrypt) (crypter_t *this, chunk_t data, chunk_t iv,
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chunk_t *decrypted);
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/**
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* Get the block size of the crypto algorithm.
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*
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* @return block size in bytes
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*/
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size_t (*get_block_size) (crypter_t *this);
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/**
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* Get the key size of the crypto algorithm.
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*
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* @return key size in bytes
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*/
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size_t (*get_key_size) (crypter_t *this);
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/**
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* Set the key.
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*
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* The length of the key must match get_key_size().
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*
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* @param key key to set
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*/
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void (*set_key) (crypter_t *this, chunk_t key);
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/**
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* Destroys a crypter_t object.
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*/
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void (*destroy) (crypter_t *this);
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};
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#endif /** CRYPTER_H_ @}*/
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