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first commit, SM2-DSA only

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Zhi Guan
2014-12-01 10:40:26 +08:00
commit 57954c4567
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crypto/modes/cbc128.c Normal file
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/* ====================================================================
* Copyright (c) 2008 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* openssl-core@openssl.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
*/
#include "modes.h"
#include <string.h>
#ifndef MODES_DEBUG
# ifndef NDEBUG
# define NDEBUG
# endif
#endif
#include <assert.h>
#define STRICT_ALIGNMENT 1
#if defined(__i386) || defined(__i386__) || \
defined(__x86_64) || defined(__x86_64__) || \
defined(_M_IX86) || defined(_M_AMD64) || defined(_M_X64) || \
defined(__s390__) || defined(__s390x__)
# undef STRICT_ALIGNMENT
# define STRICT_ALIGNMENT 0
#endif
void CRYPTO_cbc128_encrypt(const unsigned char *in, unsigned char *out,
size_t len, const void *key,
unsigned char ivec[16], block128_f block)
{
size_t n;
const unsigned char *iv = ivec;
assert(in && out && key && ivec);
#if !defined(OPENSSL_SMALL_FOOTPRINT)
if (STRICT_ALIGNMENT &&
((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) {
while (len>=16) {
for(n=0; n<16; ++n)
out[n] = in[n] ^ iv[n];
(*block)(out, out, key);
iv = out;
len -= 16;
in += 16;
out += 16;
}
} else {
while (len>=16) {
for(n=0; n<16; n+=sizeof(size_t))
*(size_t*)(out+n) =
*(size_t*)(in+n) ^ *(size_t*)(iv+n);
(*block)(out, out, key);
iv = out;
len -= 16;
in += 16;
out += 16;
}
}
#endif
while (len) {
for(n=0; n<16 && n<len; ++n)
out[n] = in[n] ^ iv[n];
for(; n<16; ++n)
out[n] = iv[n];
(*block)(out, out, key);
iv = out;
if (len<=16) break;
len -= 16;
in += 16;
out += 16;
}
memcpy(ivec,iv,16);
}
void CRYPTO_cbc128_decrypt(const unsigned char *in, unsigned char *out,
size_t len, const void *key,
unsigned char ivec[16], block128_f block)
{
size_t n;
union { size_t align; unsigned char c[16]; } tmp;
assert(in && out && key && ivec);
#if !defined(OPENSSL_SMALL_FOOTPRINT)
if (in != out) {
const unsigned char *iv = ivec;
if (STRICT_ALIGNMENT &&
((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) {
while (len>=16) {
(*block)(in, out, key);
for(n=0; n<16; ++n)
out[n] ^= iv[n];
iv = in;
len -= 16;
in += 16;
out += 16;
}
}
else {
while (len>=16) {
(*block)(in, out, key);
for(n=0; n<16; n+=sizeof(size_t))
*(size_t *)(out+n) ^= *(size_t *)(iv+n);
iv = in;
len -= 16;
in += 16;
out += 16;
}
}
memcpy(ivec,iv,16);
} else {
if (STRICT_ALIGNMENT &&
((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0) {
unsigned char c;
while (len>=16) {
(*block)(in, tmp.c, key);
for(n=0; n<16; ++n) {
c = in[n];
out[n] = tmp.c[n] ^ ivec[n];
ivec[n] = c;
}
len -= 16;
in += 16;
out += 16;
}
}
else {
size_t c;
while (len>=16) {
(*block)(in, tmp.c, key);
for(n=0; n<16; n+=sizeof(size_t)) {
c = *(size_t *)(in+n);
*(size_t *)(out+n) =
*(size_t *)(tmp.c+n) ^ *(size_t *)(ivec+n);
*(size_t *)(ivec+n) = c;
}
len -= 16;
in += 16;
out += 16;
}
}
}
#endif
while (len) {
unsigned char c;
(*block)(in, tmp.c, key);
for(n=0; n<16 && n<len; ++n) {
c = in[n];
out[n] = tmp.c[n] ^ ivec[n];
ivec[n] = c;
}
if (len<=16) {
for (; n<16; ++n)
ivec[n] = in[n];
break;
}
len -= 16;
in += 16;
out += 16;
}
}