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small tuning of cubehash

This commit is contained in:
bg 2010-09-01 11:56:00 +00:00
parent f078dc4f51
commit 591e3dc094
1 changed files with 14 additions and 16 deletions
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30
cubehash/cubehash.c
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@ -57,20 +57,21 @@ static void cubehash_round(cubehash_ctx_t* ctx){
ctx->a[i] = ctx->a[i+8];
ctx->a[i+8] = t;
}
for(i=0; i<16; ++i){
ctx->a[i] ^= ctx->a[i+16];
}
for(i=16; i<4*4+16; i+=4){
t = ctx->a[i];
ctx->a[i] = ctx->a[i+2];
ctx->a[i+2] = t;
ctx->a[i-16] ^= t;
ctx->a[i] = ctx->a[i+2] + ctx->a[i-16];
ctx->a[i-16] = rotate11left(ctx->a[i-16]);
ctx->a[i-14] ^= ctx->a[i+2];
ctx->a[i+2] = t + ctx->a[i-14];
ctx->a[i-14] = rotate11left(ctx->a[i-14]);
t = ctx->a[i+1];
ctx->a[i+1] = ctx->a[i+3];
ctx->a[i+3] = t;
}
for(i=0; i<16; ++i){
ctx->a[i+16] += ctx->a[i];
ctx->a[i] = rotate11left(ctx->a[i]);
ctx->a[i-15] ^= t;
ctx->a[i+1] = ctx->a[i+3] + ctx->a[i-15];
ctx->a[i-15] = rotate11left(ctx->a[i-15]);
ctx->a[i-13] ^= ctx->a[i+3];
ctx->a[i+3] = t + ctx->a[i-13];
ctx->a[i-13] = rotate11left(ctx->a[i-13]);
}
for(i=0; i<4; ++i){
t = ctx->a[i];
@ -82,12 +83,9 @@ static void cubehash_round(cubehash_ctx_t* ctx){
ctx->a[i] = ctx->a[i+4];
ctx->a[i+4] = t;
}
for(i=0; i<16; ++i){
ctx->a[i] ^= ctx->a[i+16];
}
for(i=16; i<16+16; i+=2){
t = ctx->a[i];
ctx->a[i] = ctx->a[i+1];
ctx->a[i-16] ^= t = ctx->a[i];
ctx->a[i-15] ^= ctx->a[i] = ctx->a[i+1];
ctx->a[i+1] = t;
}
}