From efd533331d6a7f0c51ef857af448a6c84c3084ed Mon Sep 17 00:00:00 2001
From: Camil Staps
Date: Fri, 12 Feb 2016 15:01:00 +0100
Subject: Removed spaces in path

---
 Assignment 3/des-demo.py | 62 ------------------------------------------------
 1 file changed, 62 deletions(-)
 delete mode 100755 Assignment 3/des-demo.py

(limited to 'Assignment 3/des-demo.py')

diff --git a/Assignment 3/des-demo.py b/Assignment 3/des-demo.py
deleted file mode 100755
index 0a4954f..0000000
--- a/Assignment 3/des-demo.py	
+++ /dev/null
@@ -1,62 +0,0 @@
-#!/usr/bin/python
-
-# Copyright (c) 2015 Camil Staps <info@camilstaps.nl>
-
-import sys, getopt, binascii
-from Crypto.Cipher import DES
-
-def main(argv):
-    key = ''
-    plaintext = ''
-    ciphertext = ''
-
-    # Parse arguments. Use -h for help.
-    try:
-        opts, args = getopt.getopt(argv, "hk:p:c:", ["key=","plaintext=","ciphertext="])
-    except getopt.GetoptError:
-        usage()
-        sys.exit(2)
-
-    for opt, arg in opts:
-        if opt == '-h':
-            usage()
-            sys.exit()
-        elif opt in ("-k", "--key"):
-            key = binascii.a2b_hex(arg)
-        elif opt in ("-p", "--plaintext"):
-            plaintext = binascii.a2b_hex(arg)
-        elif opt in ("-c", "--ciphertext"):
-            ciphertext = binascii.a2b_hex(arg)
-
-    if key == '' or plaintext == '' and ciphertext == '':
-        usage()
-        sys.exit(2)
-
-    # PyCrypto does the hard work
-    cipher = DES.new(key, DES.MODE_ECB)
-
-    encryption = ''
-    decryption = ''
-
-    if plaintext != '':
-        encryption = cipher.encrypt(plaintext)
-    if ciphertext != '':
-        decryption = cipher.decrypt(ciphertext)
-
-    # When plaintext and ciphertext are provided, output if DES[k](p) = c. Otherwise, output the encryption / decryption.
-    if encryption != '' and decryption != '':
-        print encryption == ciphertext
-    elif encryption != '':
-        print binascii.b2a_hex(encryption)
-    elif decryption != '':
-        print binascii.b2a_hex(decryption)
-
-def usage():
-    print 'Usage: des-demo.py -k <key> [-p <plaintext>] [-c <ciphertext>]'
-    print '  key        : an 8-byte value entered as hexadecimal numbers'
-    print '  plaintext  : an 8-byte value entered as hexadecimal numbers'
-    print '  ciphertext : an 8-byte value entered as hexadecimal numbers'
-    print 'At least one of plaintext and ciphertext should be provided. When both are provided, we check if DES[k](p) = c.'
-
-if __name__ == "__main__":
-    main(sys.argv[1:])
-- 
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