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86 lines
3.0 KiB
C
86 lines
3.0 KiB
C
/* ====================================================================
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* Copyright (c) 2014 - 2017 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 <stdio.h>
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#include <openssl/sms4.h>
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#include "sms4_lcl.h"
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#define L32(x) \
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((x) ^ \
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ROT32((x), 2) ^ \
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ROT32((x), 10) ^ \
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ROT32((x), 18) ^ \
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ROT32((x), 24))
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#define ROUND(x0, x1, x2, x3, x4, i) \
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x4 = x1 ^ x2 ^ x3 ^ *(rk + i); \
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x4 = S32(x4); \
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x4 = x0 ^ L32(x4)
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void sms4_encrypt(const unsigned char *in, unsigned char *out, const sms4_key_t *key)
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{
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const uint32_t *rk = key->rk;
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uint32_t x0, x1, x2, x3, x4;
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x0 = GET32(in );
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x1 = GET32(in + 4);
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x2 = GET32(in + 8);
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x3 = GET32(in + 12);
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ROUNDS(x0, x1, x2, x3, x4);
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PUT32(x0, out );
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PUT32(x4, out + 4);
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PUT32(x3, out + 8);
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PUT32(x2, out + 12);
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x0 = x1 = x2 = x3 = x4 = 0;
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}
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