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60 lines
2.1 KiB
C
60 lines
2.1 KiB
C
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/*
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* File: rc5-16.h
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* Author: zvrba
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* Created: 2008-04-08
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*
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* ===========================================================================
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* COPYRIGHT (c) 2008 Zeljko Vrba <zvrba.external@zvrba.net>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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* ===========================================================================
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*/
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/**
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* @file
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* Interfaces for RC5-16 encryption.
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*/
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#ifndef RC5_16_H__
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#define RC5_16_H__
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#define RC5_BLOCKSZ 4 /* (bytes) */
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#define RC5_KEYLEN 16 /* (bytes) */
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#define RC5_ROUNDS 12 /* # of rounds */
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typedef unsigned short RC5_WORD;
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struct rc5_key {
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unsigned char key[RC5_KEYLEN];
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RC5_WORD S[2*(RC5_ROUNDS+1)];
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};
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/**
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* Expand the key. On entry, the the ks->key field must be initialized with
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* the desired key.
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*/
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void rc5_setup(struct rc5_key *ks);
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/** Encrypt a single block. It is allowed that src == dst. */
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void rc5_ecb_encrypt(const struct rc5_key *ks, void *src, void *dst);
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/** Decrypt a single block. It is allowed that src == dst. */
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void rc5_ecb_decrypt(const struct rc5_key *ks, void *src, void *dst);
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#endif /* RC5_16_H__ */
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