Integrated my history into data

2018-01-21 10:46:18 -08:00
parent bce29a723f
commit 97d35e633c
917 changed files with 50890 additions and 11 deletions
@@ -0,0 +1,47 @@
+from openid import cryptutil
+
+
+def strxor(x, y):
+    if len(x) != len(y):
+        raise ValueError('Inputs to strxor must have the same length')
+
+    if isinstance(x, str):
+        x = x.encode("utf-8")
+    if isinstance(y, str):
+        y = y.encode("utf-8")
+
+    return bytes([a ^ b for a, b in zip(x, y)])
+
+
+class DiffieHellman(object):
+    DEFAULT_MOD = 155172898181473697471232257763715539915724801966915404479707795314057629378541917580651227423698188993727816152646631438561595825688188889951272158842675419950341258706556549803580104870537681476726513255747040765857479291291572334510643245094715007229621094194349783925984760375594985848253359305585439638443
+
+    DEFAULT_GEN = 2
+
+    def fromDefaults(cls):
+        return cls(cls.DEFAULT_MOD, cls.DEFAULT_GEN)
+
+    fromDefaults = classmethod(fromDefaults)
+
+    def __init__(self, modulus, generator):
+        self.modulus = int(modulus)
+        self.generator = int(generator)
+
+        self._setPrivate(cryptutil.randrange(1, modulus - 1))
+
+    def _setPrivate(self, private):
+        """This is here to make testing easier"""
+        self.private = private
+        self.public = pow(self.generator, self.private, self.modulus)
+
+    def usingDefaultValues(self):
+        return (self.modulus == self.DEFAULT_MOD and
+                self.generator == self.DEFAULT_GEN)
+
+    def getSharedSecret(self, composite):
+        return pow(composite, self.private, self.modulus)
+
+    def xorSecret(self, composite, secret, hash_func):
+        dh_shared = self.getSharedSecret(composite)
+        hashed_dh_shared = hash_func(cryptutil.longToBinary(dh_shared))
+        return strxor(secret, hashed_dh_shared)