abc/GmSSL
1
0
Fork 0
mirror of https://github.com/guanzhi/GmSSL.git synced 2026-08-14 01:53:41 +08:00
Code Issues Packages Projects Releases Wiki Activity

update

Browse Source
This commit is contained in:
Zhi Guan
2015-08-15 15:02:15 +08:00
parent 06df2fab54
commit 3bdc0ea895
2536 changed files with 417052 additions and 271997 deletions
Download Patch File Download Diff File Expand all files Collapse all files

116
crypto/modes/ofb128.c
View File

@@ -6,7 +6,7 @@
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 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
@@ -48,7 +48,8 @@
*
*/
#include "modes.h"
#include <openssl/crypto.h>
#include "modes_lcl.h"
#include <string.h>
#ifndef MODES_DEBUG
@@ -58,71 +59,66 @@
#endif
#include <assert.h>
#define STRICT_ALIGNMENT
#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
#endif
/* The input and output encrypted as though 128bit ofb mode is being
* used. The extra state information to record how much of the
* 128bit block we have used is contained in *num;
/*
* The input and output encrypted as though 128bit ofb mode is being used.
* The extra state information to record how much of the 128bit block we have
* used is contained in *num;
*/
void CRYPTO_ofb128_encrypt(const unsigned char *in, unsigned char *out,
size_t len, const void *key,
unsigned char ivec[16], int *num,
block128_f block)
size_t len, const void *key,
unsigned char ivec[16], int *num, block128_f block)
{
unsigned int n;
size_t l=0;
unsigned int n;
size_t l = 0;
assert(in && out && key && ivec && num);
assert(in && out && key && ivec && num);
n = *num;
n = *num;
#if !defined(OPENSSL_SMALL_FOOTPRINT)
if (16%sizeof(size_t) == 0) do { /* always true actually */
while (n && len) {
*(out++) = *(in++) ^ ivec[n];
--len;
n = (n+1) % 16;
}
#if defined(STRICT_ALIGNMENT)
if (((size_t)in|(size_t)out|(size_t)ivec)%sizeof(size_t) != 0)
break;
if (16 % sizeof(size_t) == 0) { /* always true actually */
do {
while (n && len) {
*(out++) = *(in++) ^ ivec[n];
--len;
n = (n + 1) % 16;
}
# if defined(STRICT_ALIGNMENT)
if (((size_t)in | (size_t)out | (size_t)ivec) % sizeof(size_t) !=
0)
break;
# endif
while (len >= 16) {
(*block) (ivec, ivec, key);
for (; n < 16; n += sizeof(size_t))
*(size_t *)(out + n) =
*(size_t *)(in + n) ^ *(size_t *)(ivec + n);
len -= 16;
out += 16;
in += 16;
n = 0;
}
if (len) {
(*block) (ivec, ivec, key);
while (len--) {
out[n] = in[n] ^ ivec[n];
++n;
}
}
*num = n;
return;
} while (0);
}
/* the rest would be commonly eliminated by x86* compiler */
#endif
while (len>=16) {
(*block)(ivec, ivec, key);
for (; n<16; n+=sizeof(size_t))
*(size_t*)(out+n) =
*(size_t*)(in+n) ^ *(size_t*)(ivec+n);
len -= 16;
out += 16;
in += 16;
n = 0;
}
if (len) {
(*block)(ivec, ivec, key);
while (len--) {
out[n] = in[n] ^ ivec[n];
++n;
}
}
*num = n;
return;
} while(0);
/* the rest would be commonly eliminated by x86* compiler */
#endif
while (l<len) {
if (n==0) {
(*block)(ivec, ivec, key);
}
out[l] = in[l] ^ ivec[n];
++l;
n = (n+1) % 16;
}
while (l < len) {
if (n == 0) {
(*block) (ivec, ivec, key);
}
out[l] = in[l] ^ ivec[n];
++l;
n = (n + 1) % 16;
}
*num=n;
*num = n;
}