mirror of
https://github.com/henrydcase/pqc.git
synced 2024-11-26 17:31:38 +00:00
37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
#include "poly.h"
|
|
|
|
|
|
void PQCLEAN_NTRUHPS4096821_AVX2_poly_Sq_tobytes(unsigned char *r, const poly *a) {
|
|
int i;
|
|
|
|
for (i = 0; i < NTRU_PACK_DEG / 2; i++) {
|
|
r[3 * i + 0] = (unsigned char) ( MODQ(a->coeffs[2 * i + 0]) & 0xff);
|
|
r[3 * i + 1] = (unsigned char) ((MODQ(a->coeffs[2 * i + 0]) >> 8) | ((MODQ(a->coeffs[2 * i + 1]) & 0x0f) << 4));
|
|
r[3 * i + 2] = (unsigned char) ((MODQ(a->coeffs[2 * i + 1]) >> 4));
|
|
}
|
|
}
|
|
|
|
void PQCLEAN_NTRUHPS4096821_AVX2_poly_Sq_frombytes(poly *r, const unsigned char *a) {
|
|
int i;
|
|
for (i = 0; i < NTRU_PACK_DEG / 2; i++) {
|
|
r->coeffs[2 * i + 0] = (a[3 * i + 0] >> 0) | (((uint16_t)a[3 * i + 1] & 0x0f) << 8);
|
|
r->coeffs[2 * i + 1] = (a[3 * i + 1] >> 4) | (((uint16_t)a[3 * i + 2] & 0xff) << 4);
|
|
}
|
|
r->coeffs[NTRU_N - 1] = 0;
|
|
}
|
|
|
|
void PQCLEAN_NTRUHPS4096821_AVX2_poly_Rq_sum_zero_tobytes(unsigned char *r, const poly *a) {
|
|
PQCLEAN_NTRUHPS4096821_AVX2_poly_Sq_tobytes(r, a);
|
|
}
|
|
|
|
void PQCLEAN_NTRUHPS4096821_AVX2_poly_Rq_sum_zero_frombytes(poly *r, const unsigned char *a) {
|
|
int i;
|
|
PQCLEAN_NTRUHPS4096821_AVX2_poly_Sq_frombytes(r, a);
|
|
|
|
/* Set r[n-1] so that the sum of coefficients is zero mod q */
|
|
r->coeffs[NTRU_N - 1] = 0;
|
|
for (i = 0; i < NTRU_PACK_DEG; i++) {
|
|
r->coeffs[NTRU_N - 1] -= r->coeffs[i];
|
|
}
|
|
}
|