mirror of
https://github.com/henrydcase/pqc.git
synced 2024-11-30 03:11:43 +00:00
91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
#include "blas_u32.h"
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#include "gf.h"
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void PQCLEAN_RAINBOWVCCLASSIC_CLEAN_gf256v_predicated_add_u32(uint8_t *accu_b, uint8_t predicate, const uint8_t *a, unsigned _num_byte) {
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uint32_t pr_u32 = ((uint32_t) 0) - ((uint32_t) predicate);
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uint8_t pr_u8 = pr_u32 & 0xff;
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unsigned n_u32 = _num_byte >> 2;
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uint32_t *b_u32 = (uint32_t *) accu_b;
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const uint32_t *a_u32 = (const uint32_t *) a;
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for (unsigned i = 0; i < n_u32; i++) {
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b_u32[i] ^= (a_u32[i] & pr_u32);
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}
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a += (n_u32 << 2);
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accu_b += (n_u32 << 2);
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unsigned rem = _num_byte & 3;
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for (unsigned i = 0; i < rem; i++) {
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accu_b[i] ^= (a[i] & pr_u8);
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}
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}
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void PQCLEAN_RAINBOWVCCLASSIC_CLEAN_gf256v_add_u32(uint8_t *accu_b, const uint8_t *a, unsigned _num_byte) {
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unsigned n_u32 = _num_byte >> 2;
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uint32_t *b_u32 = (uint32_t *) accu_b;
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const uint32_t *a_u32 = (const uint32_t *) a;
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for (unsigned i = 0; i < n_u32; i++) {
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b_u32[i] ^= a_u32[i];
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}
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a += (n_u32 << 2);
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accu_b += (n_u32 << 2);
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unsigned rem = _num_byte & 3;
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for (unsigned i = 0; i < rem; i++) {
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accu_b[i] ^= a[i];
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}
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}
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void PQCLEAN_RAINBOWVCCLASSIC_CLEAN_gf256v_mul_scalar_u32(uint8_t *a, uint8_t b, unsigned _num_byte) {
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unsigned n_u32 = _num_byte >> 2;
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uint32_t *a_u32 = (uint32_t *) a;
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for (unsigned i = 0; i < n_u32; i++) {
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a_u32[i] = PQCLEAN_RAINBOWVCCLASSIC_CLEAN_gf256v_mul_u32(a_u32[i], b);
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}
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union tmp_32 {
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uint8_t u8[4];
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uint32_t u32;
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} t;
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t.u32 = 0;
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a += (n_u32 << 2);
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unsigned rem = _num_byte & 3;
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for (unsigned i = 0; i < rem; i++) {
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t.u8[i] = a[i];
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}
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t.u32 = PQCLEAN_RAINBOWVCCLASSIC_CLEAN_gf256v_mul_u32(t.u32, b);
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for (unsigned i = 0; i < rem; i++) {
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a[i] = t.u8[i];
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}
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}
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void PQCLEAN_RAINBOWVCCLASSIC_CLEAN_gf256v_madd_u32(uint8_t *accu_c, const uint8_t *a, uint8_t gf256_b, unsigned _num_byte) {
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unsigned n_u32 = _num_byte >> 2;
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uint32_t *c_u32 = (uint32_t *) accu_c;
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const uint32_t *a_u32 = (const uint32_t *) a;
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for (unsigned i = 0; i < n_u32; i++) {
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c_u32[i] ^= PQCLEAN_RAINBOWVCCLASSIC_CLEAN_gf256v_mul_u32(a_u32[i], gf256_b);
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}
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union tmp_32 {
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uint8_t u8[4];
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uint32_t u32;
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} t;
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t.u32 = 0;
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accu_c += (n_u32 << 2);
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a += (n_u32 << 2);
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unsigned rem = _num_byte & 3;
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for (unsigned i = 0; i < rem; i++) {
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t.u8[i] = a[i];
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}
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t.u32 = PQCLEAN_RAINBOWVCCLASSIC_CLEAN_gf256v_mul_u32(t.u32, gf256_b);
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for (unsigned i = 0; i < rem; i++) {
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accu_c[i] ^= t.u8[i];
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}
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}
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