import binascii, hmac, hashlib
def create_session_key(lenght=16):
try:
from random import SystemRandom as Random
except ImportError, e:
from random import Random
r_instance = Random()
r_instance.jumpahead()
# According to http://skymind.com/~ocrow/python_string/ list comprehension is the best way to do string concats like this one
bytes = ''.join([chr(r_instance.randint(0,255)) for num in xrange(lenght)])
return bytes
def hex_encode(input_str):
return binascii.hexlify(input_str)
def hex_decode(input_str):
return binascii.unhexlify(input_str)
try:
return binascii.unhexlify(input_str)
except TypeError, e:
return False
class hmac_wrapper:
def __init__(self, hmac_key):
self.hmac_key = hmac_key
def sign(self, message):
h = hmac.new(self.hmac_key, message, hashlib.sha1)
return message + "\t" + h.hexdigest()
