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#define INITIAL_DATA_LEN 9
#define SHA_CHUNK_LEN 64
#define ROL(x, shamt) ((x << shamt) | (x >> (sizeof(x)*8 - shamt)))
struct sha_data {
unsigned int a;
unsigned int b;
unsigned int c;
unsigned int d;
unsigned int e;
unsigned long len;
unsigned long data_len;
unsigned char data[SHA_CHUNK_LEN];
};
void sha_chunk(unsigned char (*buf)[SHA_CHUNK_LEN], struct sha_data *sha) {
unsigned int w[80] = {0};
unsigned int new_a = 0;
unsigned int a = sha->a;
unsigned int b = sha->b;
unsigned int c = sha->c;
unsigned int d = sha->d;
unsigned int e = sha->e;
unsigned int i = 0;
unsigned int bo = 0;
const unsigned int k[] = {
0x5A827999,
0x6ED9EBA1,
0x8F1BBCDC,
0xCA62C1D6
};
#pragma unroll
for (i = 0; i < 16; i++, bo+=4) {
w[i] = ((*buf)[bo]) << 24;
w[i] |= ((*buf)[bo+1]) << 16;
w[i] |= ((*buf)[bo+2]) << 8;
w[i] |= ((*buf)[bo+3]);
}
// #pragma unroll
for (i = 16; i < 80; i++) {
w[i] = ROL((w[i-3] ^ w[i-8] ^ w[i-14] ^ w[i-16]), 1);
}
// #pragma unroll
for (i = 0; i < 20; i++) {
new_a = ROL(a, 5) + ((b&c)|((~b)&d)) + e + w[i] + k[0];
e = d;
d = c;
c = ROL(b, 30);
b = a;
a = new_a;
}
// #pragma unroll
for (i = 20; i < 40; i++) {
new_a = ROL(a, 5) + (b^c^d) + e + w[i] + k[1];
e = d;
d = c;
c = ROL(b, 30);
b = a;
a = new_a;
}
// #pragma unroll
for (i = 40; i < 60; i++) {
new_a = ROL(a, 5) + ((b&c)|(b&d)|(c&d)) + e + w[i] + k[2];
e = d;
d = c;
c = ROL(b, 30);
b = a;
a = new_a;
}
// #pragma unroll
for (i = 60; i < 80; i++) {
new_a = ROL(a, 5) + (b^c^d) + e + w[i] + k[3];
e = d;
d = c;
c = ROL(b, 30);
b = a;
a = new_a;
}
sha->a += a;
sha->b += b;
sha->c += c;
sha->d += d;
sha->e += e;
}
void sha_final(unsigned char *digest, struct sha_data *c) {
size_t i = 0;
#pragma unroll
for (i = INITIAL_DATA_LEN+5; i < SHA_CHUNK_LEN-8; i++)
c->data[i] = 0;
sha_chunk(&(c->data), c);
digest[ 0] = c->a >> 24;
digest[ 1] = c->a >> 16;
digest[ 2] = c->a >> 8;
digest[ 3] = c->a;
digest[ 4] = c->b >> 24;
digest[ 5] = c->b >> 16;
digest[ 6] = c->b >> 8;
digest[ 7] = c->b;
digest[ 8] = c->c >> 24;
digest[ 9] = c->c >> 16;
}
__kernel void key_brute(
__global unsigned int *results,
__constant struct sha_data *partial,
__constant unsigned char *search,
const unsigned int raw_length,
const unsigned int bitmask)
{
unsigned int tx = get_global_id(0);
unsigned int ty = get_global_id(1);
unsigned int i,j;
struct sha_data ctx;
unsigned char digest[20];
results[tx] = 0;
/* Data area plus (useless) exponent area, and end bit */
#pragma unroll
for (j = 0; j < INITIAL_DATA_LEN+5; j++) {
ctx.data[j] = partial->data[j];
}
#pragma unroll
for (j = SHA_CHUNK_LEN - 8; j < SHA_CHUNK_LEN; j++) {
ctx.data[j] = partial->data[j];
}
ctx.data[INITIAL_DATA_LEN] = tx >> 8;
/* if MSB is 0, then it doesn't need to be stored in the key, so violates
* law of sizeof(e) == 4, messing everything up */
if (ctx.data[INITIAL_DATA_LEN] == 0) {
return;
}
ctx.data[INITIAL_DATA_LEN + 1] = tx;
for (i = 3; i < 65536; i+=2) {
ctx.a = partial->a;
ctx.b = partial->b;
ctx.c = partial->c;
ctx.d = partial->d;
ctx.e = partial->e;
//////////////////////////////////////////////////////////////
ctx.data[INITIAL_DATA_LEN + 2] = i >> 8;
ctx.data[INITIAL_DATA_LEN + 3] = i;
/////////////////////////////////////////////////////////////
sha_final(&digest, &ctx);
int all_clear = 1;
for (j = 0; j < raw_length; j++) {
if (search[j] != digest[j]) {
all_clear = 0;
}
}
if (all_clear == 1 && (digest[j] & bitmask) == (search[j] & bitmask)) {
results[tx] = i;
}
}
return;
}
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