Create Onepad_Cipher.py

In one pad algorithm length of key and length of message are equal which results in endless possibilities of false messages on bruteforce.

ciphers/Onepad_Cipher.py

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+class Onepad:
+    def encrypt(self, text):
+        '''Function to encrypt text using psedo-random numbers'''
+        plain = []
+        key = []
+        cipher = []
+        for i in text:
+            plain.append(ord(i))
+        for i in plain:
+            k = random.randint(1, 300)
+            c = (i+k)*k
+            cipher.append(c)
+            key.append(k)
+        return cipher, key
+    
+    def decrypt(self, cipher, key):
+        '''Function to decrypt text using psedo-random numbers.'''
+        plain = []
+        for i in range(len(key)):
+            p = (cipher[i]-(key[i])**2)/key[i]
+            plain.append(chr(p))
+        plain = ''.join([i for i in plain])
+        return plain
+        
+if __name__ == '__main__':
+    c,k = Onepad().encrypt('Hello')
+    print c, k
+    print Onepad().decrypt(c, k)