148 lines
3.5 KiB
C
148 lines
3.5 KiB
C
/**
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* @file signer.h
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*
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* @brief Interface for signer_t.
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*
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*/
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/*
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* Copyright (C) 2005 Jan Hutter, Martin Willi
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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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#ifndef SIGNER_H_
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#define SIGNER_H_
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#include <types.h>
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#include <definitions.h>
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typedef enum integrity_algorithm_t integrity_algorithm_t;
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/**
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* @brief Integrity algorithm, as in IKEv2 draft 3.3.2.
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*
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* Currently only the following algorithms are implemented and therefore supported:
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* - AUTH_HMAC_MD5_96
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* - AUTH_HMAC_SHA1_96
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*
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* @ingroup signers
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*/
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enum integrity_algorithm_t {
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AUTH_UNDEFINED = 1024,
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/**
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* Implemented in class hmac_signer_t.
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*/
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AUTH_HMAC_MD5_96 = 1,
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/**
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* Implemented in class hmac_signer_t.
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*/
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AUTH_HMAC_SHA1_96 = 2,
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AUTH_DES_MAC = 3,
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AUTH_KPDK_MD5 = 4,
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AUTH_AES_XCBC_96 = 5
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};
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/**
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* String mappings for integrity_algorithm_t.
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*/
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extern mapping_t integrity_algorithm_m[];
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typedef struct signer_t signer_t;
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/**
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* @brief Generig interface for a symmetric signature algorithm.
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*
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* @b Constructors:
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* - signer_create()
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* - hmac_signer_create()
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*
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* @todo Implement more integrity algorithms
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*
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* @ingroup signers
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*/
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struct signer_t {
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/**
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* @brief Generate a signature.
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*
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* @param this calling object
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* @param data a chunk containing the data to sign
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* @param[out] buffer pointer where the signature will be written
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*/
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void (*get_signature) (signer_t *this, chunk_t data, u_int8_t *buffer);
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/**
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* @brief Generate a signature and allocate space for it.
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*
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* @param this calling object
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* @param data a chunk containing the data to sign
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* @param[out] chunk chunk which will hold the allocated signature
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*/
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void (*allocate_signature) (signer_t *this, chunk_t data, chunk_t *chunk);
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/**
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* @brief Verify a signature.
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*
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* @param this calling object
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* @param data a chunk containing the data to verify
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* @param signature a chunk containing the signature
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* @return TRUE, if signature is valid, FALSE otherwise
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*/
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bool (*verify_signature) (signer_t *this, chunk_t data, chunk_t signature);
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/**
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* @brief Get the block size of this signature algorithm.
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*
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* @param this calling object
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* @return block size in bytes
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*/
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size_t (*get_block_size) (signer_t *this);
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/**
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* @brief Get the key size of the signature algorithm.
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*
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* @param this calling object
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* @return key size in bytes
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*/
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size_t (*get_key_size) (signer_t *this);
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/**
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* @brief Set the key for this object.
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*
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* @param this calling object
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* @param key key to set
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*/
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void (*set_key) (signer_t *this, chunk_t key);
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/**
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* @brief Destroys a signer_t object.
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*
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* @param this calling object
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*/
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void (*destroy) (signer_t *this);
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};
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/**
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* @brief Creates a new signer_t object.
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*
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* @param integrity_algorithm Algorithm to use for signing and verifying.
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* @return
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* - signer_t object
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* - NULL if signer not supported
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*
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* @ingroup signers
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*/
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signer_t *signer_create(integrity_algorithm_t integrity_algorithm);
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#endif /*SIGNER_H_*/
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