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Add secp256k1_scalar_add_bit

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This commit is contained in:
Pieter Wuille
2014-11-25 15:20:44 +01:00
parent 3c0ae43d66
commit 5213207856
4 changed files with 62 additions and 0 deletions
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19
src/tests.c
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@@ -382,6 +382,25 @@ void scalar_test(void) {
CHECK(secp256k1_scalar_eq(&r1, &r2));
}
{
/* Test add_bit. */
int bit = secp256k1_rand32() % 256;
secp256k1_scalar_t b;
secp256k1_scalar_clear(&b);
secp256k1_scalar_add_bit(&b, 0);
CHECK(secp256k1_scalar_is_one(&b));
for (int i = 0; i < bit; i++) {
secp256k1_scalar_add(&b, &b, &b);
}
secp256k1_scalar_t r1 = s1, r2 = s1;
secp256k1_scalar_add(&r1, &r1, &b);
if (!(secp256k1_scalar_get_bits(&s1, 255, 1) == 1 && secp256k1_scalar_get_bits(&r1, 255, 1) == 0)) {
/* No overflow happened. */
secp256k1_scalar_add_bit(&r2, bit);
CHECK(secp256k1_scalar_eq(&r1, &r2));
}
}
{
/* Test commutativity of mul. */
secp256k1_scalar_t r1, r2;