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128bit is a common blocksize in linux kernel cryptography, so it helps to centralize some common operations. The code, while mostly trivial, is based on a header file mode_hdr.h in http://fp.gladman.plus.com/AES/modes.vc8.19-06-06.zip The original copyright (and GPL statement) of the original author, Dr Brian Gladman, is preserved. Signed-off-by: Rik Snel <rsnel@cube.dyndns.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
81 lines
2.4 KiB
C
81 lines
2.4 KiB
C
/* b128ops.h - common 128-bit block operations
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*
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* Copyright (c) 2003, Dr Brian Gladman, Worcester, UK.
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* Copyright (c) 2006, Rik Snel <rsnel@cube.dyndns.org>
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*
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* Based on Dr Brian Gladman's (GPL'd) work published at
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* http://fp.gladman.plus.com/cryptography_technology/index.htm
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* See the original copyright notice below.
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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 Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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/*
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---------------------------------------------------------------------------
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Copyright (c) 2003, Dr Brian Gladman, Worcester, UK. All rights reserved.
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LICENSE TERMS
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The free distribution and use of this software in both source and binary
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form is allowed (with or without changes) provided that:
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1. distributions of this source code include the above copyright
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notice, this list of conditions and the following disclaimer;
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2. distributions in binary form include the above copyright
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notice, this list of conditions and the following disclaimer
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in the documentation and/or other associated materials;
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3. the copyright holder's name is not used to endorse products
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built using this software without specific written permission.
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ALTERNATIVELY, provided that this notice is retained in full, this product
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may be distributed under the terms of the GNU General Public License (GPL),
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in which case the provisions of the GPL apply INSTEAD OF those given above.
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DISCLAIMER
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This software is provided 'as is' with no explicit or implied warranties
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in respect of its properties, including, but not limited to, correctness
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and/or fitness for purpose.
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---------------------------------------------------------------------------
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Issue Date: 13/06/2006
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*/
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#ifndef _CRYPTO_B128OPS_H
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#define _CRYPTO_B128OPS_H
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#include <linux/types.h>
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typedef struct {
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u64 a, b;
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} u128;
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typedef struct {
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__be64 a, b;
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} be128;
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typedef struct {
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__le64 b, a;
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} le128;
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static inline void u128_xor(u128 *r, const u128 *p, const u128 *q)
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{
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r->a = p->a ^ q->a;
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r->b = p->b ^ q->b;
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}
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static inline void be128_xor(be128 *r, const be128 *p, const be128 *q)
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{
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u128_xor((u128 *)r, (u128 *)p, (u128 *)q);
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}
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static inline void le128_xor(le128 *r, const le128 *p, const le128 *q)
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{
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u128_xor((u128 *)r, (u128 *)p, (u128 *)q);
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}
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#endif /* _CRYPTO_B128OPS_H */
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