Initial YakPanel commit

class/pyotp/hotp.py

@@ -0,0 +1,58 @@
+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 counter 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
+        )