101 lines
4.0 KiB
C
101 lines
4.0 KiB
C
/* des.h */
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/*
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This file is part of the ARM-Crypto-Lib.
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Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file des.h
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* \author Daniel Otte
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* \date 2007-06-16
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* \brief des and tdes declarations
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* \license GPLv3 or later
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*
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*/
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#ifndef DES_H_
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#define DES_H_
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/* the FIPS 46-3 (1999-10-25) name for triple DES is triple data encryption algorithm so TDEA.
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* Also we only implement the three key mode */
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/** \def tdea_enc
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* \brief defining an alias for void tdes_enc(void* out, const void* in, const void* key)
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*/
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/** \def tdea_dec
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* \brief defining an alias for void tdes_dec(void* out, const void* in, const void* key)
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*/
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#define tdea_enc tdes_enc
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#define tdea_dec tdes_dec
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/** \fn void des_enc(void* out, const void* in, const void* key)
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* \brief encrypt a block with DES
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*
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* This function encrypts a block of 64 bits (8 bytes) with the DES algorithm.
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* Key expansion is done automatically. The key is 64 bits long, but note that
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* only 56 bits are used (the LSB of each byte is dropped). The input and output
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* blocks may overlap.
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*
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* \param out pointer to the block (64 bit = 8 byte) where the ciphertext is written to
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* \param in pointer to the block (64 bit = 8 byte) where the plaintext is read from
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* \param key pointer to the key (64 bit = 8 byte)
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*/
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void des_enc(void* out, const void* in, const void* key);
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/** \fn void des_dec(void* out, const void* in, const void* key)
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* \brief decrypt a block with DES
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*
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* This function decrypts a block of 64 bits (8 bytes) with the DES algorithm.
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* Key expansion is done automatically. The key is 64 bits long, but note that
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* only 56 bits are used (the LSB of each byte is dropped). The input and output
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* blocks may overlap.
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*
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* \param out pointer to the block (64 bit = 8 byte) where the plaintext is written to
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* \param in pointer to the block (64 bit = 8 byte) where the ciphertext is read from
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* \param key pointer to the key (64 bit = 8 byte)
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*/
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void des_dec(void* out, const void* in, const void* key);
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/** \fn void tdes_enc(void* out, const void* in, const void* key)
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* \brief encrypt a block with Tripple-DES
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*
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* This function encrypts a block of 64 bits (8 bytes) with the Tripple-DES (EDE)
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* algorithm. Key expansion is done automatically. The key is 192 bits long, but
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* note that only 178 bits are used (the LSB of each byte is dropped). The input
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* and output blocks may overlap.
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*
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* \param out pointer to the block (64 bit = 8 byte) where the ciphertext is written to
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* \param in pointer to the block (64 bit = 8 byte) where the plaintext is read from
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* \param key pointer to the key (192 bit = 24 byte)
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*/
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void tdes_enc(void* out, const void* in, const void* key);
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/** \fn void tdes_dec(void* out, const void* in, const void* key)
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* \brief decrypt a block with Tripple-DES
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*
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* This function decrypts a block of 64 bits (8 bytes) with the Tripple-DES (EDE)
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* algorithm. Key expansion is done automatically. The key is 192 bits long, but
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* note that only 178 bits are used (the LSB of each byte is dropped). The input
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* and output blocks may overlap.
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*
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* \param out pointer to the block (64 bit = 8 byte) where the plaintext is written to
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* \param in pointer to the block (64 bit = 8 byte) where the ciphertext is read from
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* \param key pointer to the key (192 bit = 24 byte)
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*/
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void tdes_dec(void* out, const void* in, const void* key);
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#endif /*DES_H_*/
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