def xorStr(str1, str2):
str1 = encoding.hexDecode(str1)
str2 = encoding.hexDecode(str2)
str3 = ''
for i in range(len(str1)):
str3 += chr(asc(str1[i]).__xor__(asc(str2[i])))
return encoding.hexEncode(str3)
def main():
text = open('6.txt', 'r').read()
text = encoding.base64Decode(text)
print 'Text size:', len(text)
print
size = guessKeySize(text, 2, 40)
print 'Provably key size:', size
print
part = sliceText(text, size)
print 'Text splitted into %d blocks of %d bytes' % (len(part), len(
part[0]))
print
tran = transposeBlocks(part, size)
print 'Transposed blocks.'
print 'Now we have %d blocks of %d bytes' % (len(tran), len(tran[0]))
print
key = ''
for block in tran:
key += chr(betterHistogram(block))
print 'The key appears to be:', key
print
print 'The original text would be:'
print
print encoding.hexDecode(set1_challenge5.xorCrypt(text, key))
def findXord(str): str = encoding.hexDecode(str) pos = [] for i in range(256): pos.append(0) tmp = unxor(str, i).lower() for wrd in english_commons: if wrd in tmp: pos[i] = pos[i] + 1 m = 0 for y in range(256): if pos[y] > pos[m]: m = y if (pos[m] == 0): return -1 return m
#!/usr/bin/env python2
import encoding
asc = lambda c : ord(c)
def xorCrypt(str, key):
enc = ''
for i in range(0, len(str), len(key)):
for j in range(len(key)):
if (i+j) < len(str):
enc += chr(asc(str[i+j]).__xor__(asc(key[j])))
else:
break
return encoding.hexEncode(enc)
if __name__ == '__main__':
enc1 = xorCrypt('Burning \'em, if you ain\'t quick and nimble\n'
+ 'I go crazy when I hear a cymbal', 'ICE')
dec1 = encoding.hexDecode(xorCrypt(encoding.hexDecode(enc1), 'ICE'))
print dec1
out += chr(asc(str[j]).__xor__(c)) return out def findXord(str): str = encoding.hexDecode(str) pos = [] for i in range(256): pos.append(0) tmp = unxor(str, i).lower() for wrd in english_commons: if wrd in tmp: pos[i] = pos[i] + 1 m = 0 for y in range(256): if pos[y] > pos[m]: m = y if (pos[m] == 0): return -1 return m xor = '1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736' #XOR'd with char 88 (X) #Original text: "Cooking MC's like a pound of bacon" if (__name__ == '__main__'): c = findXord(xor) print c print unxor(encoding.hexDecode(xor), c)
#!/usr/bin/env python2
import encoding
import set1_challenge3
asc = lambda c : ord(c)
file = open('4.txt', 'r')
n = 0
for line in file.readlines():
print "Line #%d: %s" %(n, line.rstrip())
c = set1_challenge3.findXord(line.rstrip())
if (c > -1):
print "Encoded (%d): %s" %(c, set1_challenge3.unxor(encoding.hexDecode(line.rstrip()), c))
n += 1
#7b5a4215415d544115415d5015455447414c155c46155f4058455c5b523f
#nOWTHATHEPARTYISJUMPING* (Xor'd with 21)