22 lines
610 B
C
22 lines
610 B
C
#include "gf2x_arith.h"
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#include "utils.h"
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/* compares DIGIT sequences, returns 0 if they are equal */
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int PQCLEAN_LEDAKEMLT52_LEAKTIME_gf2x_verify(const DIGIT *a, const DIGIT *b, size_t len) {
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DIGIT x = 0;
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for (size_t i = 0; i < len; i++) {
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x |= a[i] ^ b[i];
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}
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x = (~x) + 1;
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x >>= (DIGIT_SIZE_b - 1);
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return (int)x;
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}
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/* conditionally move a into r if cond */
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void PQCLEAN_LEDAKEMLT52_LEAKTIME_cmov(uint8_t *r, const uint8_t *a, size_t len, int cond) {
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uint8_t mask = (uint8_t)(-cond);
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for (size_t i = 0; i < len; i++) {
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r[i] ^= mask & (r[i] ^ a[i]);
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}
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}
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