-// SHA-1 code Copyright 2007 Michael Nidermayer <michaelni@gmx.at>
-// license LGPL
-// based on public domain SHA-1 code by Steve Reid <steve@edmweb.com>
+/*
+ * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at>
+ * based on public domain SHA-1 code by Steve Reid <steve@edmweb.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
#include "common.h"
#include "bswap.h"
uint32_t state[5];
} AVSHA1;
+const int av_sha1_size = sizeof(AVSHA1);
+
#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
-#define blk0(i) (block[i] = be2me_32(((uint32_t*)buffer)[i]))
+#define blk0(i) (block[i] = be2me_32(((const uint32_t*)buffer)[i]))
#define blk(i) (block[i] = rol(block[i-3]^block[i-8]^block[i-14]^block[i-16],1))
#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y) +blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
/* Hash a single 512-bit block. This is the core of the algorithm. */
-static void transform(uint32_t state[5], uint8_t buffer[64]){
+static void transform(uint32_t state[5], const uint8_t buffer[64]){
uint32_t block[80];
unsigned int i, a, b, c, d, e;
c = state[2];
d = state[3];
e = state[4];
-#ifdef CONFIG_SMALL
+#if CONFIG_SMALL
for(i=0; i<80; i++){
int t;
if(i<16) t= be2me_32(((uint32_t*)buffer)[i]);
ctx->count = 0;
}
-void av_sha1_update(AVSHA1* ctx, uint8_t* data, unsigned int len){
+void av_sha1_update(AVSHA1* ctx, const uint8_t* data, unsigned int len){
unsigned int i, j;
j = ctx->count & 63;
ctx->count += len;
-#ifdef CONFIG_SMALL
+#if CONFIG_SMALL
for( i = 0; i < len; i++ ){
ctx->buffer[ j++ ] = data[i];
if( 64 == j ){
while ((ctx->count & 63) != 56) {
av_sha1_update(ctx, "", 1);
}
- av_sha1_update(ctx, &finalcount, 8); /* Should cause a transform() */
+ av_sha1_update(ctx, (uint8_t *)&finalcount, 8); /* Should cause a transform() */
for(i=0; i<5; i++)
((uint32_t*)digest)[i]= be2me_32(ctx->state[i]);
}
-// use the following to test
-// gcc -DTEST -DHAVE_AV_CONFIG_H -I.. sha1.c -O2 -W -Wall -o sha1 && time ./sha1
#ifdef TEST
#include <stdio.h>
#undef printf
-int main(){
+int main(void){
int i, k;
AVSHA1 ctx;
unsigned char digest[20];
printf("%02X", digest[i]);
putchar('\n');
}
- //Test Vectors (from FIPS PUB 180-1)
+ //test vectors (from FIPS PUB 180-1)
printf("A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D\n"
"84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1\n"
"34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F\n");