# cipher classification
class CipherStrength(Enum):
unknown = -1
- exp = 0
- low = 1
- medium = 2
high = 3
def colorName(self):
- if self == CipherStrength.unknown:
- return self.name
- elif self.value == CipherStrength.high.value:
+ if self.value == CipherStrength.high.value:
return ConsoleFormat.color(self.name, ConsoleFormat.GREEN)
- elif self.value == CipherStrength.medium.value:
- return ConsoleFormat.color(self.name, ConsoleFormat.YELLOW)
else:
- return ConsoleFormat.color(self.name, ConsoleFormat.RED)
+ return ConsoleFormat.color(self.name, ConsoleFormat.YELLOW)
CipherProps = namedtuple('CipherProps', 'bits, strength, isPfs')
class CipherPropsProvider:
def __init__(self):
- self.medium = set(list_ciphers("MEDIUM"))
self.high = set(list_ciphers("HIGH"))
self.props = {}
protocol = protocol[:pos]
# as OpenSSL about this cipher
cipherInfo = subprocess.check_output(["openssl", "ciphers", "-v", "-"+protocol, cipher]).decode('UTF-8').strip()
- assert '\n' not in cipherInfo, "Cipher "+cipher+" produced unexpected output:\n"+cipherInfo
- cipherInfoFields = cipherInfo.split()
+ cipherInfoFields = None
+ for line in cipherInfo.split('\n'):
+ line = line.split()
+ if line[0] == cipher:
+ cipherInfoFields = line
+ break
+ if cipherInfoFields is None:
+ raise Exception("Cannot determine cipher properties of {0} (protocol: {1})".format(cipher, protocol))
# get # of bits
encMatch = re.match(r'^Enc=([0-9A-Za-z]+)\(([0-9]+)\)$', cipherInfoFields[4])
if encMatch is None:
kx = kxMatch.group(1)
isPfs = kx in ('DH', 'DH(512)', 'ECDH')
# determine security level
- isMedium = cipher in self.medium
- isHigh = cipher in self.high
- assert isMedium+isHigh <= 1, "Cipher "+cipher+" is more than one from EXP, LOW, MEDIUM, HIGH"
- if isMedium:
- strength = CipherStrength.medium
- elif isHigh:
+ if cipher in self.high:
strength = CipherStrength.high
else:
strength = CipherStrength.unknown