def test_asymmetric_verify(self):
"""Tests asymmetric signature verification"""
pub_keys = [self._server_pub_key1, self._client_pub_key2]
priv_keys = [self._server_priv_key1, self._client_priv_key2]
original_plaintext = b'''I do things like get in a taxi and say, \'The
library, and step on it.\''''
# The enumeration assumes both key lists are of same size and the index
# of one list holds a key that corresponds to the same index of the
# other list.
for i, pub_key in enumerate(pub_keys):
ciphertext, original_signature = _asymmetric_encrypt_sign(
original_plaintext, pub_key, priv_keys[i])
msg = unpack(asymmetric_decrypt(ciphertext, priv_keys[i]))
plaintext, signature = msg['msg'], msg['signature']
self.assertEqual(original_plaintext, plaintext)
self.assertEqual(original_signature, signature)
self.assertTrue(asymmetric_verify(signature, plaintext, pub_key))
for other_priv_key in priv_keys:
if other_priv_key != priv_keys[i]:
# making sure other private keys don't work if they are not
# equal
other_ciphtext, other_sig = _asymmetric_encrypt_sign(
original_plaintext, pub_key, other_priv_key)
self.assertNotEqual(other_ciphtext, ciphertext)
self.assertNotEqual(other_sig, signature)
for other_pub_key in pub_keys:
if other_pub_key != pub_key:
self.assertTrue(asymmetric_verify(
other_sig, original_plaintext, other_pub_key))
self.assertFalse(asymmetric_verify(
other_sig, original_plaintext, pub_key))
self.assertFalse(asymmetric_verify(
signature, original_plaintext, other_pub_key))
def test_asymmetric_verify(self):
"""Tests asymmetric signature verification"""
pub_keys = [self._server_pub_key1, self._client_pub_key2]
priv_keys = [self._server_priv_key1, self._client_priv_key2]
original_plaintext = b'''I do things like get in a taxi and say, \'The
library, and step on it.\''''
# The enumeration assumes both key lists are of same size and the index
# of one list holds a key that corresponds to the same index of the
# other list.
for i, pub_key in enumerate(pub_keys):
ciphertext, original_signature = _asymmetric_encrypt_sign(
original_plaintext, pub_key, priv_keys[i])
msg = unpack(asymmetric_decrypt(ciphertext, priv_keys[i]))
plaintext, signature = msg['msg'], msg['signature']
self.assertEqual(original_plaintext, plaintext)
self.assertEqual(original_signature, signature)
self.assertTrue(asymmetric_verify(signature, plaintext, pub_key))
for other_priv_key in priv_keys:
if other_priv_key != priv_keys[i]:
# making sure other private keys don't work if they are not
# equal
other_ciphtext, other_sig = _asymmetric_encrypt_sign(
original_plaintext, pub_key, other_priv_key)
self.assertNotEqual(other_ciphtext, ciphertext)
self.assertNotEqual(other_sig, signature)
for other_pub_key in pub_keys:
if other_pub_key != pub_key:
self.assertTrue(
asymmetric_verify(other_sig,
original_plaintext,
other_pub_key))
self.assertFalse(
asymmetric_verify(other_sig,
original_plaintext, pub_key))
self.assertFalse(
asymmetric_verify(signature,
original_plaintext,
other_pub_key))