/usr/lib/python3/dist-packages/pyotp/hotp.py is in python3-pyotp 2.2.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | from __future__ import absolute_import, division, print_function, unicode_literals
from . import utils
from .otp import OTP
from .compat import str
class HOTP(OTP):
"""
Handler for HMAC-based OTP counters.
"""
def at(self, count):
"""
Generates the OTP for the given count.
:param count: the OTP HMAC counter
:type count: int
:returns: OTP
:rtype: str
"""
return self.generate_otp(count)
def verify(self, otp, counter):
"""
Verifies the OTP passed in against the current time OTP.
:param otp: the OTP to check against
:type otp: str
:param count: the OTP HMAC counter
:type count: int
"""
return utils.strings_equal(str(otp), str(self.at(counter)))
def provisioning_uri(self, name, initial_count=0, issuer_name=None):
"""
Returns the provisioning URI for the OTP. This can then be
encoded in a QR Code and used to provision an OTP app like
Google Authenticator.
See also:
https://github.com/google/google-authenticator/wiki/Key-Uri-Format
:param name: name of the user account
:type name: str
:param initial_count: starting HMAC counter value, defaults to 0
:type initial_count: int
:param issuer_name: the name of the OTP issuer; this will be the
organization title of the OTP entry in Authenticator
:returns: provisioning URI
:rtype: str
"""
return utils.build_uri(
self.secret,
name,
initial_count=initial_count,
issuer_name=issuer_name,
algorithm=self.digest().name,
digits=self.digits
)
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