def test_hash_from_hmac_not_20bytes(self):
"""Test Otp.hash_from_hmac().
Check that HMAC length validation is performed.
"""
cut = HOTP()
hmac = bytes.fromhex("ff0102030405060708090a0b0c0d0e0f101112")
with self.assertRaises(ValueError):
cut.hash_from_hmac(hmac)
def test_hash_from_hmac_not_20bytes(self):
"""Test Otp.hash_from_hmac().
Check that HMAC length validation is performed.
"""
cut = HOTP()
hmac = bytes.fromhex("ff0102030405060708090a0b0c0d0e0f101112")
with self.assertRaises(ValueError):
cut.hash_from_hmac(hmac)
def test_hash_from_hmac_not_byte_string(self):
"""Test Otp.hash_from_hmac().
Check that HMAC type (byte string) validation is performed.
"""
cut = HOTP()
hmac = bytearray.fromhex("ff0102030405060708090a0b0c0d0e0f101112f0")
with self.assertRaises(TypeError):
cut.hash_from_hmac(hmac)
def test_hash_from_hmac_not_byte_string(self):
"""Test Otp.hash_from_hmac().
Check that HMAC type (byte string) validation is performed.
"""
cut = HOTP()
hmac = bytearray.fromhex("ff0102030405060708090a0b0c0d0e0f101112f0")
with self.assertRaises(TypeError):
cut.hash_from_hmac(hmac)
def test_hash_from_hmac_clear_high_bit(self):
"""Test Otp.hash_from_hmac().
Check that the high order bit is cleared in the truncated hash.
"""
cut = HOTP()
hmac = bytes.fromhex("ff0102030405060708090a0b0c0d0e0f101112f0")
expected = bytes.fromhex("7f010203")
hash = cut.hash_from_hmac(hmac)
self.assertEqual(expected, hash)
def test_hash_from_hmac(self):
"""Test Otp.hash_from_hmac().
Check that expected truncated hash values are produced.
"""
cut = HOTP()
for i in range(0, 10):
hash = cut.hash_from_hmac(self.expected[i][1])
self.assertEqual(self.expected[i][2], hash)
return
def test_hash_from_hmac_clear_high_bit(self):
"""Test Otp.hash_from_hmac().
Check that the high order bit is cleared in the truncated hash.
"""
cut = HOTP()
hmac = bytes.fromhex("ff0102030405060708090a0b0c0d0e0f101112f0")
expected = bytes.fromhex("7f010203")
hash = cut.hash_from_hmac(hmac)
self.assertEqual(expected, hash)
def test_hash_from_hmac(self):
"""Test Otp.hash_from_hmac().
Check that expected truncated hash values are produced.
"""
cut = HOTP()
for i in range(0, 10):
hash = cut.hash_from_hmac(self.expected[i][1])
self.assertEqual(self.expected[i][2], hash)
return