// based on public domain SHA-1 code by Steve Reid <steve@edmweb.com>
#include "common.h"
+#include "bswap.h"
#include "sha1.h"
typedef struct AVSHA1 {
- uint32_t state[5];
uint64_t count;
uint8_t buffer[64];
+ uint32_t state[5];
} AVSHA1;
#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
-#define R0b(v,w,x,y,z,i) z+((w&(x^y))^y) +block[i]+0x5A827999+rol(v,5);
-#define R2b(v,w,x,y,z,i) z+( w^x ^y) +block[i]+0x6ED9EBA1+rol(v,5);
-#define R3b(v,w,x,y,z,i) z+(((w|x)&y)|(w&x))+block[i]+0x8F1BBCDC+rol(v,5);
-#define R4b(v,w,x,y,z,i) z+( w^x ^y) +block[i]+0xCA62C1D6+rol(v,5);
-
-#define blk0(i) (block[i] = be2me_32(block[i]))
+#define blk0(i) (block[i] = be2me_32(((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. */
-//#define VARIANT1
-//#define VARIANT2
-
static void transform(uint32_t state[5], uint8_t buffer[64]){
uint32_t block[80];
- unsigned int i;
-#ifdef VARIANT1
- uint32_t s[85];
-#else
- unsigned int a, b, c, d, e;
-#endif
-
-#if defined (VARIANT1) || defined (VARIANT2)
- for(i=0; i<16; i++)
- block[i]= be2me_32(((uint32_t*)buffer)[i]);
- for(;i<80; i++)
- block[i]= rol(block[i-3]^block[i-8]^block[i-14]^block[i-16],1);
-#else
- memcpy(block, buffer, 64);
-#endif
-
+ unsigned int i, a, b, c, d, e;
-#ifdef VARIANT1
- s[0]= state[4];
- s[1]= state[3];
- s[2]= state[2];
- s[3]= state[1];
- s[4]= state[0];
- for(i=0; i<20; i++){
- s[5+i]= R0b(s[4+i], s[3+i], s[2+i], s[1+i], s[i], i);
- s[3+i]= rol(s[3+i],30);
- }
- for(; i<40; i++){
- s[5+i]= R2b(s[4+i], s[3+i], s[2+i], s[1+i], s[i], i);
- s[3+i]= rol(s[3+i],30);
- }
- for(; i<60; i++){
- s[5+i]= R3b(s[4+i], s[3+i], s[2+i], s[1+i], s[i], i);
- s[3+i]= rol(s[3+i],30);
- }
- for(; i<80; i++){
- s[5+i]= R4b(s[4+i], s[3+i], s[2+i], s[1+i], s[i], i);
- s[3+i]= rol(s[3+i],30);
- }
- state[0] += s[84];
- state[1] += s[83];
- state[2] += s[82];
- state[3] += s[81];
- state[4] += s[80];
-#else
a = state[0];
b = state[1];
c = state[2];
d = state[3];
e = state[4];
-#ifdef VARIANT2
- for(i=0; i<20; i++){
- int t= R0b(a,b,c,d,e,i);
- e= d;
- d= c;
- c= rol(b,30);
- b= a;
- a= t;
- }
- for(; i<40; i++){
- int t= R2b(a,b,c,d,e,i);
- e= d;
- d= c;
- c= rol(b,30);
- b= a;
- a= t;
- }
- for(; i<60; i++){
- int t= R3b(a,b,c,d,e,i);
- e= d;
- d= c;
- c= rol(b,30);
- b= a;
- a= t;
- }
- for(; i<80; i++){
- int t= R4b(a,b,c,d,e,i);
+#ifdef CONFIG_SMALL
+ for(i=0; i<80; i++){
+ int t;
+ if(i<16) t= be2me_32(((uint32_t*)buffer)[i]);
+ else t= rol(block[i-3]^block[i-8]^block[i-14]^block[i-16],1);
+ block[i]= t;
+ t+= e+rol(a,5);
+ if(i<40){
+ if(i<20) t+= ((b&(c^d))^d) +0x5A827999;
+ else t+= ( b^c ^d) +0x6ED9EBA1;
+ }else{
+ if(i<60) t+= (((b|c)&d)|(b&c))+0x8F1BBCDC;
+ else t+= ( b^c ^d) +0xCA62C1D6;
+ }
e= d;
d= c;
c= rol(b,30);
state[2] += c;
state[3] += d;
state[4] += e;
-#endif
}
-void av_sha1_init(AVSHA1* context){
- context->state[0] = 0x67452301;
- context->state[1] = 0xEFCDAB89;
- context->state[2] = 0x98BADCFE;
- context->state[3] = 0x10325476;
- context->state[4] = 0xC3D2E1F0;
- context->count = 0;
+void av_sha1_init(AVSHA1* ctx){
+ ctx->state[0] = 0x67452301;
+ ctx->state[1] = 0xEFCDAB89;
+ ctx->state[2] = 0x98BADCFE;
+ ctx->state[3] = 0x10325476;
+ ctx->state[4] = 0xC3D2E1F0;
+ ctx->count = 0;
}
-void av_sha1_update(AVSHA1* context, uint8_t* data, unsigned int len){
+void av_sha1_update(AVSHA1* ctx, uint8_t* data, unsigned int len){
unsigned int i, j;
- j = context->count & 63;
- context->count += len;
+ j = ctx->count & 63;
+ ctx->count += len;
+#ifdef CONFIG_SMALL
+ for( i = 0; i < len; i++ ){
+ ctx->buffer[ j++ ] = data[i];
+ if( 64 == j ){
+ transform(ctx->state, ctx->buffer);
+ j = 0;
+ }
+ }
+#else
if ((j + len) > 63) {
- memcpy(&context->buffer[j], data, (i = 64-j));
- transform(context->state, context->buffer);
+ memcpy(&ctx->buffer[j], data, (i = 64-j));
+ transform(ctx->state, ctx->buffer);
for ( ; i + 63 < len; i += 64) {
- transform(context->state, &data[i]);
+ transform(ctx->state, &data[i]);
}
+ j=0;
}
else i = 0;
- memcpy(&context->buffer[j], &data[i], len - i);
+ memcpy(&ctx->buffer[j], &data[i], len - i);
+#endif
}
-void av_sha1_final(AVSHA1* context, uint8_t digest[20]){
+void av_sha1_final(AVSHA1* ctx, uint8_t digest[20]){
int i;
- uint64_t finalcount= be2me_64(context->count<<3);
+ uint64_t finalcount= be2me_64(ctx->count<<3);
- av_sha1_update(context, "\200", 1);
- while ((context->count & 63) != 56) {
- av_sha1_update(context, "", 1);
+ av_sha1_update(ctx, "\200", 1);
+ while ((ctx->count & 63) != 56) {
+ av_sha1_update(ctx, "", 1);
}
- av_sha1_update(context, &finalcount, 8); /* Should cause a transform() */
+ av_sha1_update(ctx, &finalcount, 8); /* Should cause a transform() */
for(i=0; i<5; i++)
- ((uint32_t*)digest)[i]= be2me_32(context->state[i]);
+ ((uint32_t*)digest)[i]= be2me_32(ctx->state[i]);
}
// use the following to test
int main(){
int i, k;
- AVSHA1 context;
+ AVSHA1 ctx;
unsigned char digest[20];
for(k=0; k<3; k++){
- av_sha1_init(&context);
+ av_sha1_init(&ctx);
if(k==0)
- av_sha1_update(&context, "abc", 3);
+ av_sha1_update(&ctx, "abc", 3);
else if(k==1)
- av_sha1_update(&context, "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 56);
+ av_sha1_update(&ctx, "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 56);
else
for(i=0; i<1000*1000; i++)
- av_sha1_update(&context, "a", 1);
- av_sha1_final(&context, digest);
+ av_sha1_update(&ctx, "a", 1);
+ av_sha1_final(&ctx, digest);
for (i = 0; i < 20; i++)
printf("%02X", digest[i]);
putchar('\n');