def __call__(self, key, data_input):
'''Compute an HOTP digest using the given key and data input and
following the current crypto function description.
:param key:
a byte string containing the HMAC key
:param data_input:
the data input assembled as a byte-string as described by the
OCRA specification
:returns:
the computed digest
:rtype: str
'''
h = hmac.new(key, data_input, self.hash_algo).digest()
if self.truncation_length:
return hotp.dec(h, self.truncation_length)
else:
return str(hotp.truncated_value(h))
def __call__(self, key, data_input):
h = hmac.new(key, data_input, self.hash_algo).digest()
if self.truncation_length:
return str(hotp.truncated_value(h))[-self.truncation_length:]
else:
return str(hotp.truncated_value(h))