def test_with_too_little_data(self):
key = compatHMAC(bytearray(20))
seqnum_bytes = bytearray(16)
content_type = 0x14
version = (3, 1)
mac = hashlib.sha1
data = bytearray(mac().digest_size)
h = hmac.new(key, digestmod=mac)
h.block_size = mac().block_size # python2 workaround
self.assertFalse(ct_check_cbc_mac_and_pad(data, h, seqnum_bytes,
content_type, version))
def test_with_SHA384(self):
key = compatHMAC(bytearray(20))
seqnum_bytes = bytearray(16)
content_type = 0x14
version = (3, 3)
application_data = bytearray(b'\x01'*10)
mac = hashlib.sha384
data = self.data_prepare(application_data, seqnum_bytes, content_type,
version, mac, key)
padding = bytearray(b'\x0a'*11)
data += padding
h = hmac.new(key, digestmod=mac)
h.block_size = mac().block_size # python2 workaround
self.assertTrue(ct_check_cbc_mac_and_pad(data, h, seqnum_bytes,
content_type, version))
def test_with_pad_longer_than_data_in_SSLv3(self):
key = compatHMAC(bytearray(20))
seqnum_bytes = bytearray(16)
content_type = 0x14
version = (3, 0)
application_data = bytearray(b'\x01')
mac = hashlib.sha1
data = self.data_prepare(application_data, seqnum_bytes, content_type,
version, mac, key)
padding = bytearray([len(application_data) + mac().digest_size + 1])
data += padding
h = hmac.new(key, digestmod=mac)
h.block_size = mac().block_size # python2 workaround
self.assertFalse(ct_check_cbc_mac_and_pad(data, h, seqnum_bytes,
content_type, version))
def test_with_invalid_random_hash(self, i):
key = compatHMAC(getRandomBytes(20))
seqnum_bytes = bytearray(16)
content_type = 0x15
version = (3, 3)
application_data = getRandomBytes(63)
mac = hashlib.sha1
data = self.data_prepare(application_data, seqnum_bytes, content_type,
version, mac, key)
data[-i] ^= 0xff
padding = bytearray(b'\x00')
data += padding
h = hmac.new(key, digestmod=mac)
h.block_size = mac().block_size
self.assertFalse(ct_check_cbc_mac_and_pad(data, h, seqnum_bytes,
content_type, version))
def test_with_invalid_hash(self):
key = compatHMAC(bytearray(20))
seqnum_bytes = bytearray(16)
content_type = 0x14
version = (3, 1)
application_data = bytearray(b'\x01'*1024)
mac = hashlib.sha1
data = self.data_prepare(application_data, seqnum_bytes, content_type,
version, mac, key)
data[-1] ^= 0xff
padding = bytearray(b'\xff'*256)
data += padding
h = hmac.new(key, digestmod=mac)
h.block_size = mac().block_size # python2 workaround
self.assertFalse(ct_check_cbc_mac_and_pad(data, h, seqnum_bytes,
content_type, version))