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ed25519-donna/modm: comment typo fix

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Dusan Klinec 2018-04-27 17:59:58 +02:00 committed by Pavol Rusnak
parent 1adcaea9cd
commit 5708a7257f
1 changed files with 1 additions and 1 deletions
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ed25519-donna/modm-donna-32bit.c
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@ -94,7 +94,7 @@ void barrett_reduce256_modm(bignum256modm r, const bignum256modm q1, const bignu
c += mul32x32_64(modm_mu[8], q1[8]);
f = (bignum256modm_element_t)c; q3[7] |= (f << 6) & 0x3fffffff; q3[8] = (bignum256modm_element_t)(c >> 24);
/* r1 = (x mod 256^(32+1)) = x mod (2^8)(31+1) = x & ((1 << 264) - 1)
/* r1 = (x mod 256^(32+1)) = x mod (2^8)(32+1) = x & ((1 << 264) - 1)
r2 = (q3 * m) mod (256^(32+1)) = (q3 * m) & ((1 << 264) - 1) */
c = mul32x32_64(modm_m[0], q3[0]);
r2[0] = (bignum256modm_element_t)(c & 0x3fffffff); c >>= 30;