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Weak normalization for secp256k1_fe_equal

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This commit is contained in:
Pieter Wuille
2014-12-10 14:52:18 +01:00
parent 0295f0a33d
commit d7174edf5f
6 changed files with 28 additions and 52 deletions
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11
src/field_5x52_impl.h
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@@ -205,17 +205,6 @@ SECP256K1_INLINE static void secp256k1_fe_clear(secp256k1_fe_t *a) {
}
}
SECP256K1_INLINE static int secp256k1_fe_equal(const secp256k1_fe_t *a, const secp256k1_fe_t *b) {
#ifdef VERIFY
VERIFY_CHECK(a->normalized);
VERIFY_CHECK(b->normalized);
secp256k1_fe_verify(a);
secp256k1_fe_verify(b);
#endif
const uint64_t *t = a->n, *u = b->n;
return ((t[0]^u[0]) | (t[1]^u[1]) | (t[2]^u[2]) | (t[3]^u[3]) | (t[4]^u[4])) == 0;
}
static int secp256k1_fe_cmp_var(const secp256k1_fe_t *a, const secp256k1_fe_t *b) {
#ifdef VERIFY
VERIFY_CHECK(a->normalized);