def test_failedmac(self):
for _ in xrange(self.iterations):
encrypted_message = encryption.encrypt_then_mac(self.key, 'user,2000')
mac = encrypted_message.rsplit("$", 1)[-1]
without_mac = encrypted_message.split("$")[:3]
r = random.randint(0, len(mac)-1)
mac_modified = mac[:r] + chr(ord(mac[r])+1) + mac[r+1:]
msg_modified = "$".join(without_mac + [mac_modified])
try:
encryption.decrypt_and_mac(self.key, msg_modified)
# Should not reach this
assert False
except ValueError:
pass
def test_failedmac(self):
for _ in xrange(self.iterations):
encrypted_message = encryption.encrypt_then_mac(
self.key, 'user,2000')
mac = encrypted_message.rsplit("$", 1)[-1]
without_mac = encrypted_message.split("$")[:3]
r = random.randint(0, len(mac) - 1)
mac_modified = mac[:r] + chr(ord(mac[r]) + 1) + mac[r + 1:]
msg_modified = "$".join(without_mac + [mac_modified])
try:
encryption.decrypt_and_mac(self.key, msg_modified)
# Should not reach this
assert False
except ValueError:
pass
def verify_reproducible(testcase, plaintext_msg, encrypted_msg, key):
testcase.assertEquals(encryption.decrypt_and_mac(key, encrypted_msg), plaintext_msg)
def verify_reproducible(testcase, plaintext_msg, encrypted_msg, key):
testcase.assertEquals(encryption.decrypt_and_mac(key, encrypted_msg),
plaintext_msg)
