def test_verify_signature(self): global public global private data = b'The quick brown fox jumps over the lazy dog' signature, method = ed25519_keys.create_signature(public, private, data) valid_signature = ed25519_keys.verify_signature(public, method, signature, data) self.assertEqual(True, valid_signature) # Test with 'pynacl'. valid_signature = ed25519_keys.verify_signature(public, method, signature, data, use_pynacl=True) self.assertEqual(True, valid_signature) # Test with 'pynacl', but a bad signature is provided. bad_signature = os.urandom(64) valid_signature = ed25519_keys.verify_signature(public, method, bad_signature, data, use_pynacl=True) self.assertEqual(False, valid_signature) # Check for improperly formatted arguments. self.assertRaises(tuf.FormatError, ed25519_keys.verify_signature, 123, method, signature, data) # Signature method improperly formatted. self.assertRaises(tuf.FormatError, ed25519_keys.verify_signature, public, 123, signature, data) # Invalid signature method. self.assertRaises(tuf.UnknownMethodError, ed25519_keys.verify_signature, public, 'unsupported_method', signature, data) # Signature not a string. self.assertRaises(tuf.FormatError, ed25519_keys.verify_signature, public, method, 123, data) # Invalid signature length, which must be exactly 64 bytes.. self.assertRaises(tuf.FormatError, ed25519_keys.verify_signature, public, method, 'bad_signature', data) # Check for invalid signature and data. # Mismatched data. self.assertEqual(False, ed25519_keys.verify_signature(public, method, signature, '123')) # Mismatched signature. bad_signature = b'a'*64 self.assertEqual(False, ed25519_keys.verify_signature(public, method, bad_signature, data)) # Generated signature created with different data. new_signature, method = ed25519_keys.create_signature(public, private, b'mismatched data') self.assertEqual(False, ed25519_keys.verify_signature(public, method, new_signature, data))
def test_create_signature(self): global public global private data = b'The quick brown fox jumps over the lazy dog' signature, method = ed25519_keys.create_signature(public, private, data) # Verify format of returned values. self.assertEqual(True, tuf.formats.ED25519SIGNATURE_SCHEMA.matches(signature)) self.assertEqual(True, tuf.formats.NAME_SCHEMA.matches(method)) self.assertEqual('ed25519', method) # Check for improperly formatted argument. self.assertRaises(tuf.FormatError, ed25519_keys.create_signature, 123, private, data) self.assertRaises(tuf.FormatError, ed25519_keys.create_signature, public, 123, data) # Check for invalid 'data'. self.assertRaises(tuf.CryptoError, ed25519_keys.create_signature, public, private, 123)