Simple functions for converting between string, hex, and int for a crypto course using Python

cryptoTools.py

def str2hex (x):
    return x.encode('hex')


def hex2str (x):
    return x.decode('hex')


def str2int (x):
    return map(ord, x)


def int2str (x):
    return "".join(map(chr, x))


def hex2int (x):    
    return map(lambda y: int(y, 16), [x[i:i+2] for i in range(0,len(x), 2)])


def int2hex (x):
    return "".join(map(chr, x)).encode('hex')


def splitHex(x):
    return [x[i:i+2] for i in range(0,len(x), 2)]


def hexxor (x, y):
    # XOR two hexadecimal strings, returning a hexadecimal string
    # warning: zip will truncate length to the shorter of x or y
    return int2hex([a ^ b for (a, b) in zip(hex2int(x), hex2int(y))])