some math scripts

Cryptography/tools/generate_prime.py

@@ -0,0 +1,33 @@
+#!/usr/bin/python
+
+import math
+import random
+import sys
+from finding_prime import finding_prime_sqrt
+
+
+def generate_prime(number=3):
+    ''' return a n-bit prime '''
+    while 1:
+        p = random.randint(pow(2, number-2), pow(2, number-1)-1)
+        p = 2 * p + 1
+        if finding_prime_sqrt(p):
+            return p
+
+
+if __name__ == '__main__':
+    if len(sys.argv) < 2:
+        print ("Usage: generate_prime.py number")
+        sys.exit()
+    else:
+        number = int(sys.argv[1])
+        print(generate_prime(number))
+
+
+
+
+
+
+
+
+