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wolfcrypt/src/integer.c: fix sub-byte clearing step of mp_mod_2d() to work when DIGIT_BIT != sizeof(mp_digit)*8.

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Daniel Pouzzner
2020-12-10 23:50:30 -06:00
parent a075540343
commit ef1284165f
1 changed files with 1 additions and 1 deletions
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wolfcrypt/src/integer.c
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@ -686,7 +686,7 @@ int mp_mod_2d (mp_int * a, int b, mp_int * c)
/* clear the digit that is not completely outside/inside the modulus */
x = DIGIT_BIT - (b % DIGIT_BIT);
if (x != DIGIT_BIT) {
c->dp[b / DIGIT_BIT] &= ~((mp_digit)0) >> x;
c->dp[b / DIGIT_BIT] &= ~((mp_digit)0) >> (x + ((sizeof(mp_digit)*8) - DIGIT_BIT));
}
mp_clamp (c);
return MP_OKAY;