class TriDES:
def __init__(self, key_list, input_str):
self.key_list = key_list
self.des1 = DES(self.key_list[0], input_str)
def encryption(self):
out1 = self.des1.ecb_encryption()
des2 = DES(self.key_list[1], out1)
out2 = des2.ecb_encryption()
des3 = DES(self.key_list[2], out2)
result = des3.ecb_encryption()
return result
def encryption(self):
out1 = self.des1.ecb_encryption()
des2 = DES(self.key_list[1], out1)
out2 = des2.ecb_encryption()
des3 = DES(self.key_list[2], out2)
result = des3.ecb_encryption()
return result
# Text is from Wikipedia
init_key_bin = hex_2_bin('133457799BBCDFF1')
key_list = [hex_2_bin('133457799BBCDFF1'), hex_2_bin('1222222FFEB13ABB'), hex_2_bin('342257799BBCDFF1')]
in_str = "Courbet was the lead ship of her class of four dreadnought battleships, the first ones built for the " \
"French Navy. In World War I, after helping to sink the Austro-Hungarian protected cruiser SMS Zenta in " \
"August 1914, she provided cover for the Otranto Barrage that blockaded the Austro-Hungarian Navy in the " \
"Adriatic Sea, and often served as a flagship. Although upgraded several times before World War II, " \
"by the 1930s she was no longer considered to be a first-line battleship and spent much of that decade " \
"as a gunnery training ship. A few weeks after the German invasion of France on 10 May 1940, Courbet was " \
"hastily reactivated. She supported Allied troops in the defence of Cherbourg during mid-June. As part " \
"of Operation Catapult, she was seized in Portsmouth by British forces on 3 July and was turned over to " \
"the Free French a week later. She was used as a stationary anti-aircraft battery and as an " \
"accommodation ship there. "
init_str = hex_2_bin(str_2_hex(in_str))
des = DES(init_key_bin, init_str)
total_run = 200
# print("Original ECB mode encryption runtime test start")
# start_time = datetime.now()
# for i in range(total_run):
# text = des.ecb_encryption()
# # if i % 5 == 0 and i != 0:
# # print('Finished', i, 'runs')
# finish_time = datetime.now() - start_time
# # print(bin_2_hex(text))
# print(total_run, 'times of original ECB mode encryption finished with', finish_time, '\n')
#
# print("Original CBC mode encryption runtime test start")
# iv = hex_2_bin('AB125AFC396214F3')
from Convert import bin_2_hex, hex_2_str, hex_2_bin, print_bin, str_2_hex
from Des import DES
###################################
# Test 1
# Key and string are taken from HW4
init_key_bin_1 = bin(int('0123456789abcdef', 16))[2:].zfill(64)
init_str_1 = bin(int('0123456789abcdef', 16))[2:].zfill(64)
des_1 = DES(init_key_bin_1, init_str_1)
text_1 = bin_2_hex(des_1.encryption(des_1.input_list[0]))
print_bin(text_1)
print()
###################################
# Test 2
# Key and string are taken from http://page.math.tu-berlin.de/~kant/teaching/hess/krypto-ws2006/des.htm
init_key_bin_2 = hex_2_bin('133457799BBCDFF1')
init_str_2 = hex_2_bin('0123456789ABCDEF')
des_2 = DES(init_key_bin_2, init_str_2)
text_2 = des_2.encryption(des_2.input_list[0])
print_bin(bin_2_hex(text_2))
print()
###################################
# Test 3
# Decryption of Test 2
init_key_bin_3 = hex_2_bin('133457799BBCDFF1')
init_str_3 = hex_2_bin('85e813540f0ab405')
des_3 = DES(init_key_bin_3, init_str_3)
text_3 = des_3.decryption(des_3.input_list[0])
print_bin(bin_2_hex(text_3))
zeros_number = 64 - len(keyVal)
for i in range(zeros_number):
updatedKeyVal += '0'
updatedKeyVal += keyVal
else:
updatedKeyVal = keyVal
if len(messageVal) != 64:
zeros_number = 64 - len(messageVal)
for i in range(zeros_number):
updatedMessageVal += '0'
updatedMessageVal += messageVal
else:
updatedMessageVal = messageVal
return [updatedMessageVal, updatedKeyVal, iterNumber]
[updatedMessageVal, updatedKeyVal, iterNumber] = prepareInput()
des = DES()
des.encrypt(updatedMessageVal, updatedKeyVal, iterNumber)
closeProgram = int(input("1: Exit\n" + "2: Try another Message\n"))
while closeProgram != 1:
if closeProgram == 1:
break
elif closeProgram == 2:
[updatedMessageVal, updatedKeyVal, iterNumber] = prepareInput()
des = DES()
des.encrypt(updatedMessageVal, updatedKeyVal, iterNumber)
closeProgram = int(input("1: Exit\n" + "2: Try another Message\n"))
else:
closeProgram = int(input("1: Exit\n" + "2: Try another Message\n"))
def __init__(self, key_list, input_str):
self.key_list = key_list
self.des1 = DES(self.key_list[0], input_str)