From: Rik Snel Date: Sun, 29 Oct 2006 00:02:07 +0000 (+1100) Subject: [CRYPTO] lib: some common 128-bit block operations, nicely centralized X-Git-Tag: v2.6.20-rc1~145^2^2~7^2~33 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=aec3694b987900de7ab789ea5749d673e0d634c4;p=linux-2.6-omap-h63xx.git [CRYPTO] lib: some common 128-bit block operations, nicely centralized 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 Signed-off-by: Herbert Xu --- diff --git a/include/crypto/b128ops.h b/include/crypto/b128ops.h new file mode 100644 index 00000000000..0b8e6bc5530 --- /dev/null +++ b/include/crypto/b128ops.h @@ -0,0 +1,80 @@ +/* b128ops.h - common 128-bit block operations + * + * Copyright (c) 2003, Dr Brian Gladman, Worcester, UK. + * Copyright (c) 2006, Rik Snel + * + * Based on Dr Brian Gladman's (GPL'd) work published at + * http://fp.gladman.plus.com/cryptography_technology/index.htm + * See the original copyright notice below. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + */ +/* + --------------------------------------------------------------------------- + Copyright (c) 2003, Dr Brian Gladman, Worcester, UK. All rights reserved. + + LICENSE TERMS + + The free distribution and use of this software in both source and binary + form is allowed (with or without changes) provided that: + + 1. distributions of this source code include the above copyright + notice, this list of conditions and the following disclaimer; + + 2. distributions in binary form include the above copyright + notice, this list of conditions and the following disclaimer + in the documentation and/or other associated materials; + + 3. the copyright holder's name is not used to endorse products + built using this software without specific written permission. + + ALTERNATIVELY, provided that this notice is retained in full, this product + may be distributed under the terms of the GNU General Public License (GPL), + in which case the provisions of the GPL apply INSTEAD OF those given above. + + DISCLAIMER + + This software is provided 'as is' with no explicit or implied warranties + in respect of its properties, including, but not limited to, correctness + and/or fitness for purpose. + --------------------------------------------------------------------------- + Issue Date: 13/06/2006 +*/ + +#ifndef _CRYPTO_B128OPS_H +#define _CRYPTO_B128OPS_H + +#include + +typedef struct { + u64 a, b; +} u128; + +typedef struct { + __be64 a, b; +} be128; + +typedef struct { + __le64 b, a; +} le128; + +static inline void u128_xor(u128 *r, const u128 *p, const u128 *q) +{ + r->a = p->a ^ q->a; + r->b = p->b ^ q->b; +} + +static inline void be128_xor(be128 *r, const be128 *p, const be128 *q) +{ + u128_xor((u128 *)r, (u128 *)p, (u128 *)q); +} + +static inline void le128_xor(le128 *r, const le128 *p, const le128 *q) +{ + u128_xor((u128 *)r, (u128 *)p, (u128 *)q); +} + +#endif /* _CRYPTO_B128OPS_H */