Python strToHex Exemples

Exemple #1

Fichier : fixedXOR.py Projet : AndrewShapiro/cryptopals-challenges

import set1

a = set1.strToHex('1c0111001f010100061a024b53535009181c')
b = set1.strToHex('686974207468652062756c6c277320657965')
result = set1.bufferXOR(a,b)
print ''.join(format(x, '02x') for x in result)

Exemple #2

Fichier : singleByteXOR.py Projet : AndrewShapiro/cryptopals-challenges

import set1

input = set1.strToHex('1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736')
print set1.breakSingleCharXOR(input)

Exemple #3

import set1
import string

lines = (line.rstrip('\n') for line in open('4.txt'))
best = []
for line in lines:
    best.append(set1.breakSingleCharXOR(set1.strToHex(line)))
print sorted(best)[-1]

Exemple #4

from Crypto.Cipher import AES
import array
import set1
import sys
import string

lines = (set1.strToHex(line.rstrip('\n')) for line in open('8.txt'))

counted = []
for line in lines:
    count = set1.twoByteMatch(line)
    counted.append((count, ''.join(format(x, '02x') for x in line)))
print sorted(counted)[-1]

Exemple #5

Fichier : repKeyXORAttack.py Projet : AndrewShapiro/cryptopals-challenges

import sys
import array
import set1

def hammingDistance(a, b):
    if len(a) != len(b):
        print "hammingDistance: lengths aren't equal"

    sum = 0
    for byteA, byteB in zip(a,b):
        sum += bin(byteA ^ byteB).count('1')
    return sum

fileContents = open(sys.argv[1] , "rb").read()   

input = set1.strToHex(fileContents)
guesses = []
for keyLenGuess in range (1, 40):
    block1 = input[ : keyLenGuess+1]
    block2 = input[keyLenGuess : (2 * keyLenGuess)+1]
    block3 = input[(2 * keyLenGuess) : (3 * keyLenGuess)+1]
    block4 = input[(3 * keyLenGuess) : (4 * keyLenGuess)+1]


    distanceNorm = (hammingDistance(block1, block2) + hammingDistance(block3, block4) + hammingDistance(block1, block3) + hammingDistance(block4, block1)) / (keyLenGuess * 4.)
    guesses.append((distanceNorm, keyLenGuess))
# print sorted(guesses)
guess = sorted(guesses)[0][1]

lenGuesses = [x[1] for x in sorted(guesses)[:3]]
byteWiseBlocks = [[] for x in range(0, guess)]

Exemple #6

from Crypto.Cipher import AES
import array
import set1
import sys
import string

fileBytes = array.array('B', set1.strToHex(open(sys.argv[1] , "rb").read()))
cipherObj = AES.new('YELLOW SUBMARINE', AES.MODE_ECB)
cipherText = cipherObj.decrypt(fileBytes)
print cipherText

Exemple #7

import set1

input = set1.strToHex(
    '1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736')
print set1.breakSingleCharXOR(input)

Exemple #8

import set1

a = set1.strToHex('1c0111001f010100061a024b53535009181c')
b = set1.strToHex('686974207468652062756c6c277320657965')
result = set1.bufferXOR(a, b)
print ''.join(format(x, '02x') for x in result)

Exemple #9

import set1


def hammingDistance(a, b):
    if len(a) != len(b):
        print "hammingDistance: lengths aren't equal"

    sum = 0
    for byteA, byteB in zip(a, b):
        sum += bin(byteA ^ byteB).count('1')
    return sum


fileContents = open(sys.argv[1], "rb").read()

input = set1.strToHex(fileContents)
guesses = []
for keyLenGuess in range(1, 40):
    block1 = input[:keyLenGuess + 1]
    block2 = input[keyLenGuess:(2 * keyLenGuess) + 1]
    block3 = input[(2 * keyLenGuess):(3 * keyLenGuess) + 1]
    block4 = input[(3 * keyLenGuess):(4 * keyLenGuess) + 1]

    distanceNorm = (hammingDistance(block1, block2) + hammingDistance(
        block3, block4) + hammingDistance(block1, block3) +
                    hammingDistance(block4, block1)) / (keyLenGuess * 4.)
    guesses.append((distanceNorm, keyLenGuess))
# print sorted(guesses)
guess = sorted(guesses)[0][1]

lenGuesses = [x[1] for x in sorted(guesses)[:3]]