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crypto_tests: added crypto_neg_identity (against negative identity pub keys and key images)

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sowle 2021-06-22 18:05:23 +03:00
parent d591db9a91
commit 1ac39d19f6
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1 changed files with 46 additions and 0 deletions
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46
tests/functional_tests/crypto_tests.cpp
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@ -1097,6 +1097,52 @@ TEST(crypto, point_basics)
return true;
}
TEST(crypto, neg_identity)
{
point_t z = c_point_0; // 0 group element (identity)
public_key z_pk = z.to_public_key(); // pub key, corresponding to 0 ge (pub key is not zero bitwise)
public_key z_neg_pk = z_pk;
((unsigned char*)&z_neg_pk)[31] = 0x80; // set sign bit manually
std::cout << "-Identity = " << z_pk << ENDL;
point_t z_neg;
ASSERT_FALSE(z_neg.from_public_key(z_neg_pk)); // negative identity should not be loaded
key_image z_ki;
memset(&z_ki, 0, sizeof(z_ki));
((unsigned char*)&z_ki)[00] = 0x01; // y = 1
ASSERT_TRUE(validate_key_image(z_ki));
key_image z_neg_ki = z_ki;
((unsigned char*)&z_neg_ki)[31] = 0x80; // set sign bit manually
ASSERT_FALSE(validate_key_image(z_neg_ki)); // negative identity should not be loaded
// also do zero-byte pub key / key image checks
public_key zzz_pk;
memset(&zzz_pk, 0, sizeof public_key);
ASSERT_TRUE(check_key(zzz_pk));
point_t zzz;
ASSERT_TRUE(zzz.from_public_key(zzz_pk));
ASSERT_FALSE(zzz.is_in_main_subgroup());
key_image zzz_ki;
memset(&zzz_ki, 0, sizeof key_image);
ASSERT_FALSE(validate_key_image(zzz_ki));
point_t zzz2;
ASSERT_TRUE(zzz2.from_key_image(zzz_ki));
ASSERT_FALSE(zzz2.is_in_main_subgroup());
ASSERT_EQ(zzz, zzz2);
return true;
}
TEST(crypto, scalar_reciprocal)
{
int64_t test_nums[] = { 1, 2, 10 };