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This commit is contained in:
Matthias J. Kannwischer 2019-05-21 15:15:52 +02:00
rodzic a4906713be
commit 081442bb8d
1 zmienionych plików z 36 dodań i 25 usunięć
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61
crypto_kem/frodokem640shake/opt/matrix_shake.c
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@ -12,14 +12,15 @@
#include "api.h"
#include "common.h"
#include "params.h"
#define USE_SHAKE128_FOR_A
#define USE_SHAKE128_FOR_A 1
int PQCLEAN_FRODOKEM640SHAKE_OPT_mul_add_as_plus_e(uint16_t *out, const uint16_t *s, const uint16_t *e, const uint8_t *seed_A) {
// Generate-and-multiply: generate matrix A (N x N) row-wise, multiply by s on the right.
// Inputs: s, e (N x N_BAR)
// Output: out = A*s + e (N x N_BAR)
int i, j, k;
int16_t a_row[4 * PARAMS_N] = {0};
int16_t a_row[4 * PARAMS_N];
for (i = 0; i < (PARAMS_N * PARAMS_NBAR); i += 2) {
*((uint32_t *)&out[i]) = *((uint32_t *)&e[i]);
@ -42,18 +43,18 @@ int PQCLEAN_FRODOKEM640SHAKE_OPT_mul_add_as_plus_e(uint16_t *out, const uint16_t
#endif
for (j = 0; j < PARAMS_N; j += PARAMS_STRIPE_STEP) {
a_row_temp[j + 1 + 0 * PARAMS_N] = j; // Loading values in the little-endian order
a_row_temp[j + 1 + 1 * PARAMS_N] = j;
a_row_temp[j + 1 + 2 * PARAMS_N] = j;
a_row_temp[j + 1 + 3 * PARAMS_N] = j;
a_row_temp[j + 1 + 0 * PARAMS_N] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(j); // Loading values in the little-endian order
a_row_temp[j + 1 + 1 * PARAMS_N] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(j);
a_row_temp[j + 1 + 2 * PARAMS_N] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(j);
a_row_temp[j + 1 + 3 * PARAMS_N] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(j);
}
for (i = 0; i < PARAMS_N; i += 4) {
for (j = 0; j < PARAMS_N; j += PARAMS_STRIPE_STEP) { // Go through A, four rows at a time
a_row_temp[j + 0 * PARAMS_N] = i + 0; // Loading values in the little-endian order
a_row_temp[j + 1 * PARAMS_N] = i + 1;
a_row_temp[j + 2 * PARAMS_N] = i + 2;
a_row_temp[j + 3 * PARAMS_N] = i + 3;
a_row_temp[j + 0 * PARAMS_N] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(i + 0); // Loading values in the little-endian order
a_row_temp[j + 1 * PARAMS_N] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(i + 1);
a_row_temp[j + 2 * PARAMS_N] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(i + 2);
a_row_temp[j + 3 * PARAMS_N] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(i + 3);
}
#if !defined(USE_OPENSSL)
@ -68,16 +69,18 @@ int PQCLEAN_FRODOKEM640SHAKE_OPT_mul_add_as_plus_e(uint16_t *out, const uint16_t
uint16_t *seed_A_origin = (uint16_t *)&seed_A_separated;
memcpy(&seed_A_separated[2], seed_A, BYTES_SEED_A);
for (i = 0; i < PARAMS_N; i += 4) {
seed_A_origin[0] = (uint16_t) (i + 0);
seed_A_origin[0] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(i + 0);
shake128((unsigned char *)(a_row + 0 * PARAMS_N), (unsigned long long)(2 * PARAMS_N), seed_A_separated, 2 + BYTES_SEED_A);
seed_A_origin[0] = (uint16_t) (i + 1);
seed_A_origin[0] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(i + 1);
shake128((unsigned char *)(a_row + 1 * PARAMS_N), (unsigned long long)(2 * PARAMS_N), seed_A_separated, 2 + BYTES_SEED_A);
seed_A_origin[0] = (uint16_t) (i + 2);
seed_A_origin[0] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(i + 2);
shake128((unsigned char *)(a_row + 2 * PARAMS_N), (unsigned long long)(2 * PARAMS_N), seed_A_separated, 2 + BYTES_SEED_A);
seed_A_origin[0] = (uint16_t) (i + 3);
seed_A_origin[0] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(i + 3);
shake128((unsigned char *)(a_row + 3 * PARAMS_N), (unsigned long long)(2 * PARAMS_N), seed_A_separated, 2 + BYTES_SEED_A);
#endif
for (k = 0; k < 4 * PARAMS_N; k++) {
a_row[k] = PQCLEAN_FRODOKEM640SHAKE_OPT_LE_TO_UINT16(a_row[k]);
}
for (k = 0; k < PARAMS_NBAR; k++) {
uint16_t sum[4] = {0};
for (j = 0; j < PARAMS_N; j++) { // Matrix-vector multiplication
@ -101,19 +104,22 @@ int PQCLEAN_FRODOKEM640SHAKE_OPT_mul_add_as_plus_e(uint16_t *out, const uint16_t
}
int PQCLEAN_FRODOKEM640SHAKE_OPT_mul_add_sa_plus_e(uint16_t *out, const uint16_t *s, const uint16_t *e, const uint8_t *seed_A) {
// Generate-and-multiply: generate matrix A (N x N) column-wise, multiply by s' on the left.
// Inputs: s', e' (N_BAR x N)
// Output: out = s'*A + e' (N_BAR x N)
int i, j, k, kk;
int i, j, kk;
for (i = 0; i < (PARAMS_N * PARAMS_NBAR); i += 2) {
*((uint32_t *)&out[i]) = *((uint32_t *)&e[i]);
}
#if defined(USE_AES128_FOR_A)
int k;
uint16_t a_cols[PARAMS_N * PARAMS_STRIPE_STEP] = {0};
uint16_t a_cols_t[PARAMS_N * PARAMS_STRIPE_STEP] = {0};
uint16_t a_cols_t[PARAMS_N * PARAMS_STRIPE_STEP];
uint16_t a_cols_temp[PARAMS_N * PARAMS_STRIPE_STEP] = {0};
#if !defined(USE_OPENSSL)
uint8_t aes_key_schedule[16 * 11];
@ -130,12 +136,12 @@ int PQCLEAN_FRODOKEM640SHAKE_OPT_mul_add_sa_plus_e(uint16_t *out, const uint16_t
#endif
for (i = 0, j = 0; i < PARAMS_N; i++, j += PARAMS_STRIPE_STEP) {
a_cols_temp[j] = i; // Loading values in the little-endian order
a_cols_temp[j] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(i); // Loading values in the little-endian order
}
for (kk = 0; kk < PARAMS_N; kk += PARAMS_STRIPE_STEP) { // Go through A's columns, 8 (== PARAMS_STRIPE_STEP) columns at a time.
for (i = 0; i < (PARAMS_N * PARAMS_STRIPE_STEP); i += PARAMS_STRIPE_STEP) {
a_cols_temp[i + 1] = kk; // Loading values in the little-endian order
a_cols_temp[i + 1] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(kk); // Loading values in the little-endian order
}
#if !defined(USE_OPENSSL)
@ -148,7 +154,7 @@ int PQCLEAN_FRODOKEM640SHAKE_OPT_mul_add_sa_plus_e(uint16_t *out, const uint16_t
for (i = 0; i < PARAMS_N; i++) { // Transpose a_cols to have access to it in the column-major order.
for (k = 0; k < PARAMS_STRIPE_STEP; k++) {
a_cols_t[k * PARAMS_N + i] = a_cols[i * PARAMS_STRIPE_STEP + k];
a_cols_t[k * PARAMS_N + i] = PQCLEAN_FRODOKEM640SHAKE_OPT_LE_TO_UINT16(a_cols[i * PARAMS_STRIPE_STEP + k]);
}
}
@ -173,19 +179,24 @@ int PQCLEAN_FRODOKEM640SHAKE_OPT_mul_add_sa_plus_e(uint16_t *out, const uint16_t
#elif defined (USE_SHAKE128_FOR_A) // SHAKE128
int t = 0;
uint16_t a_cols[4 * PARAMS_N] = {0};
uint16_t a_cols[4 * PARAMS_N];
int k;
uint8_t seed_A_separated[2 + BYTES_SEED_A];
uint16_t *seed_A_origin = (uint16_t *)&seed_A_separated;
memcpy(&seed_A_separated[2], seed_A, BYTES_SEED_A);
for (kk = 0; kk < PARAMS_N; kk += 4) {
seed_A_origin[0] = (uint16_t) (kk + 0);
seed_A_origin[0] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(kk + 0);
shake128((unsigned char *)(a_cols + 0 * PARAMS_N), (unsigned long long)(2 * PARAMS_N), seed_A_separated, 2 + BYTES_SEED_A);
seed_A_origin[0] = (uint16_t) (kk + 1);
seed_A_origin[0] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(kk + 1);
shake128((unsigned char *)(a_cols + 1 * PARAMS_N), (unsigned long long)(2 * PARAMS_N), seed_A_separated, 2 + BYTES_SEED_A);
seed_A_origin[0] = (uint16_t) (kk + 2);
seed_A_origin[0] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(kk + 2);
shake128((unsigned char *)(a_cols + 2 * PARAMS_N), (unsigned long long)(2 * PARAMS_N), seed_A_separated, 2 + BYTES_SEED_A);
seed_A_origin[0] = (uint16_t) (kk + 3);
seed_A_origin[0] = PQCLEAN_FRODOKEM640SHAKE_OPT_UINT16_TO_LE(kk + 3);
shake128((unsigned char *)(a_cols + 3 * PARAMS_N), (unsigned long long)(2 * PARAMS_N), seed_A_separated, 2 + BYTES_SEED_A);
for (i = 0; i < 4 * PARAMS_N; i++) {
a_cols[i] = PQCLEAN_FRODOKEM640SHAKE_OPT_LE_TO_UINT16(a_cols[i]);
}
for (i = 0; i < PARAMS_NBAR; i++) {
uint16_t sum[PARAMS_N] = {0};