feat: add predict_random

Author: oplik0

randcrack/randcrack.py

@@ -98,6 +98,11 @@ def predict_choice(self, seq):
             raise IndexError('Cannot choose from an empty sequence')
         return seq[i]
 
+    def predict_random(self):
+        a = self._to_int(self._predict_32()) >> 5
+        b = self._to_int(self._predict_32()) >> 6
+        return ((a*67108864.0)+b)/9007199254740992.0
+
     def _to_bitarray(self, num):
         k = [int(x) for x in bin(num)[2:]]
         return [0] * (32 - len(k)) + k

tests/test_randcrack.py

@@ -50,3 +50,12 @@ def test_predict_first_1000_close():
         cracker.submit(random.randint(0, 4294967294))
 
     assert sum([random.getrandbits(32) == cracker.predict_getrandbits(32) for _ in range(1000)]) >= 980
+
+def test_predict_random():
+    random.seed(time.time())
+
+    cracker = RandCrack()
+
+    for i in range(624):
+        cracker.submit(random.randint(0, 4294967294))
+    assert sum([random.random() == cracker.predict_random() for _ in range(1000)]) >= 980