79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
|
#include "ft_sha.h"
|
||
|
|
|
||
|
|
static void fill_up_words(BYTE4 w[FT_SHA256_BLOCK_SIZE])
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
i = 16;
|
||
|
|
while (i < FT_SHA256_BLOCK_SIZE)
|
||
|
|
{
|
||
|
|
w[i] = SHA256_sigma1(w[i - 2]) + w[i - 7] +
|
||
|
|
SHA256_sigma0(w[i - 15]) + w[i - 16];
|
||
|
|
i++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void copy_from_registers(t_sha256_ctx *from, t_temp_registers *to)
|
||
|
|
{
|
||
|
|
to->a = from->a;
|
||
|
|
to->b = from->b;
|
||
|
|
to->c = from->c;
|
||
|
|
to->d = from->d;
|
||
|
|
to->e = from->e;
|
||
|
|
to->f = from->f;
|
||
|
|
to->g = from->g;
|
||
|
|
to->h = from->h;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void add_to_registers(t_temp_registers *from, t_sha256_ctx *to)
|
||
|
|
{
|
||
|
|
to->a += from->a;
|
||
|
|
to->b += from->b;
|
||
|
|
to->c += from->c;
|
||
|
|
to->d += from->d;
|
||
|
|
to->e += from->e;
|
||
|
|
to->f += from->f;
|
||
|
|
to->g += from->g;
|
||
|
|
to->h += from->h;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void main_transform_loop
|
||
|
|
(
|
||
|
|
t_temp_registers *tr,
|
||
|
|
BYTE4 w[FT_SHA256_BLOCK_SIZE]
|
||
|
|
)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
BYTE4 temp1, temp2;
|
||
|
|
BYTE4 *k;
|
||
|
|
|
||
|
|
k = ft_sha256_constants();
|
||
|
|
i = 0;
|
||
|
|
while (i < FT_SHA256_BLOCK_SIZE)
|
||
|
|
{
|
||
|
|
temp1 = tr->h + SHA256_SIGMA1(tr->e) +
|
||
|
|
SHA_Ch(tr->e, tr->f, tr->g) + k[i] + w[i];
|
||
|
|
temp2 = SHA256_SIGMA0(tr->a) + SHA_Maj(tr->a, tr->b, tr->c);
|
||
|
|
tr->h = tr->g;
|
||
|
|
tr->g = tr->f;
|
||
|
|
tr->f = tr->e;
|
||
|
|
tr->e = tr->d + temp1;
|
||
|
|
tr->d = tr->c;
|
||
|
|
tr->c = tr->b;
|
||
|
|
tr->b = tr->a;
|
||
|
|
tr->a = temp1 + temp2;
|
||
|
|
i++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void ft_sha256_transform(t_sha256_ctx *c, BYTE1 block[FT_SHA256_BLOCK_SIZE])
|
||
|
|
{
|
||
|
|
BYTE4 w[FT_SHA256_BLOCK_SIZE];
|
||
|
|
t_temp_registers tr;
|
||
|
|
|
||
|
|
ft_sha256_decode(w, block);
|
||
|
|
fill_up_words(w);
|
||
|
|
copy_from_registers(c, &tr);
|
||
|
|
main_transform_loop(&tr, w);
|
||
|
|
add_to_registers(&tr, c);
|
||
|
|
}
|