forked from xuos/xiuos
119 lines
3.9 KiB
C
Executable File
119 lines
3.9 KiB
C
Executable File
/* ====================================================================
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* Copyright (c) 2014 - 2019 The GmSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the GmSSL Project.
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* (http://gmssl.org/)"
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*
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* 4. The name "GmSSL Project" must not be used to endorse or promote
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* products derived from this software without prior written
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* permission. For written permission, please contact
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* guanzhi1980@gmail.com.
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*
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* 5. Products derived from this software may not be called "GmSSL"
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* nor may "GmSSL" appear in their names without prior written
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* permission of the GmSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the GmSSL Project
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* (http://gmssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE GmSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE GmSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*/
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#include "sms4_lcl.h"
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#include <sm4.h>
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#include <stdint.h>
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static uint FK[4] = {
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0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc,
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};
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static uint CK[32] = {
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0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269,
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0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9,
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0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249,
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0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9,
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0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229,
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0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299,
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0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209,
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0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279,
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};
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#define L32_(x) \
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((x) ^ \
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ROL32((x), 13) ^ \
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ROL32((x), 23))
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#define ENC_ROUND(x0, x1, x2, x3, x4, i) \
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x4 = x1 ^ x2 ^ x3 ^ *(CK + i); \
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x4 = S32(x4); \
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x4 = x0 ^ L32_(x4); \
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*(rk + i) = x4
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#define DEC_ROUND(x0, x1, x2, x3, x4, i) \
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x4 = x1 ^ x2 ^ x3 ^ *(CK + i); \
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x4 = S32(x4); \
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x4 = x0 ^ L32_(x4); \
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*(rk + 31 - i) = x4
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void sms4_set_encrypt_key(sms4_key_t *key, const unsigned char user_key[16])
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{
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uint *rk = key->rk;
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uint x0, x1, x2, x3, x4;
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x0 = GETU32(user_key) ^ FK[0];
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x1 = GETU32(user_key + 4) ^ FK[1];
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x2 = GETU32(user_key + 8) ^ FK[2];
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x3 = GETU32(user_key + 12) ^ FK[3];
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#define ROUND ENC_ROUND
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ROUNDS(x0, x1, x2, x3, x4);
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#undef ROUND
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x0 = x1 = x2 = x3 = x4 = 0;
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}
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void sms4_set_decrypt_key(sms4_key_t *key, const unsigned char user_key[16])
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{
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uint *rk = key->rk;
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uint x0, x1, x2, x3, x4;
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x0 = GETU32(user_key) ^ FK[0];
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x1 = GETU32(user_key + 4) ^ FK[1];
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x2 = GETU32(user_key + 8) ^ FK[2];
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x3 = GETU32(user_key + 12) ^ FK[3];
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#define ROUND DEC_ROUND
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ROUNDS(x0, x1, x2, x3, x4);
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#undef ROUND
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x0 = x1 = x2 = x3 = x4 = 0;
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} |