From 40f72b49017c7c4449092d32ca1cdc25520db0b2 Mon Sep 17 00:00:00 2001
From: Camil Staps
Date: Thu, 23 Apr 2015 13:33:20 +0200
Subject: Cleanup

---
 pypride.py | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

(limited to 'pypride.py')

diff --git a/pypride.py b/pypride.py
index c011f74..82788d4 100644
--- a/pypride.py
+++ b/pypride.py
@@ -127,7 +127,8 @@ PBox = [0, 16, 32, 48, 1, 17, 33, 49, 2, 18, 34, 50, 3, 19, 35, 51, 4, 20, 36, 5
 PBox_inv = [PBox.index(x) for x in xrange(64)]
 
 # Matrices for permutation in the L layer
-L0 = [[0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0],
+L0_inv = L0 = [
+      [0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0],
       [0,0,0,0,0,1,0,0,0,1,0,0,0,1,0,0],
       [0,0,0,0,0,0,1,0,0,0,1,0,0,0,1,0],
       [0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,1],
@@ -143,7 +144,6 @@ L0 = [[0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0],
       [0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0],
       [0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0],
       [0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0]]
-L0_inv = L0
 L1 = [[1,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0],
       [0,1,1,0,0,0,0,0,0,0,0,0,1,0,0,0],
       [0,0,1,1,0,0,0,0,0,0,0,0,0,1,0,0],
@@ -210,7 +210,8 @@ L2_inv = [
       [0,0,0,0,1,0,0,0,0,0,0,0,1,1,0,0],
       [0,0,0,0,0,1,0,0,0,0,0,0,0,1,1,0],
       [0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,1]]
-L3 = [[1,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0],
+L3_inv = L3 = [
+      [1,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0],
       [0,1,0,0,0,1,0,0,0,0,0,0,0,1,0,0],
       [0,0,1,0,0,0,1,0,0,0,0,0,0,0,1,0],
       [0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,1],
@@ -226,7 +227,6 @@ L3 = [[1,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0],
       [0,1,0,0,0,0,0,0,0,1,0,0,0,1,0,0],
       [0,0,1,0,0,0,0,0,0,0,1,0,0,0,1,0],
       [0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,1]]
-L3_inv = L3
 
 def mapXor(xs):
     """Xor elements of a list together"""
@@ -239,8 +239,8 @@ def matrixMultiply(matrix, input):
             input as Int
     Output: Int"""
 
-    mult = [ mapXor([1 for c_i, c in enumerate(r) if c == 1 and input & (0x1 << (15 - c_i))]) for r in matrix ]
-    return sum([(1 << (15-i)) * v for i,v in enumerate(mult)])
+    mult = [mapXor([1 for i,c in enumerate(r) if c == 1 and input & (1 << (15 - i))]) for r in matrix]
+    return sum([(1 << (15 - i)) * v for i,v in enumerate(mult)])
 
 def roundKey(key, i):
     """Calculate a round key
@@ -269,7 +269,7 @@ def sBoxLayer(state):
     Input:  64-bit integer
     Output: 64-bit integer"""
 
-    return sum([Sbox[( state >> (i*4)) & 0xF] << (i*4) for i in xrange(16)])
+    return sum([Sbox[( state >> (i * 4)) & 0xf] << (i * 4) for i in xrange(16)])
 
 def sBoxLayer_dec(state):
     """Inverse SBox function for decryption
@@ -277,7 +277,7 @@ def sBoxLayer_dec(state):
     Input:  64-bit integer
     Output: 64-bit integer"""
 
-    return sum([Sbox_inv[( state >> (i*4)) & 0xF] << (i*4) for i in xrange(16)])
+    return sum([Sbox_inv[( state >> (i * 4)) & 0xf] << (i * 4) for i in xrange(16)])
 
 def pLayer(state):
     """Permutation layer for encryption
@@ -285,7 +285,7 @@ def pLayer(state):
     Input:  64-bit integer
     Output: 64-bit integer"""
 
-    return sum ([((state >> i) & 0x01) << PBox[i] for i in xrange(64)])
+    return sum ([((state >> i) & 1) << PBox[i] for i in xrange(64)])
 
 def pLayer_dec(state):
     """Permutation layer for decryption
@@ -293,7 +293,7 @@ def pLayer_dec(state):
     Input:  64-bit integer
     Output: 64-bit integer"""
 
-    return sum ([((state >> i) & 0x01) << PBox_inv[i] for i in xrange(64)])
+    return sum ([((state >> i) & 1) << PBox_inv[i] for i in xrange(64)])
 
 def lLayer(state):
     """Perform the L layer:
@@ -333,7 +333,7 @@ def string2number(i):
     Input: string (big-endian)
     Output: long or integer
     """
-    return int(i.encode('hex'),16)
+    return int(i.encode('hex'), 16)
 
 def number2string_N(i, N):
     """Convert a number to a string of fixed size
-- 
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