convert.py

from base64 import *

def hexTob64(string):
	return byteStringToB64(hexToByteString(string))

def hexToByteString(string):
	return intToByteString(int(string, 16))

def b64ToHex(string):
	return byteStringToHex(b64ToByteString(string))

def b64ToByteString(string):
	return b64decode(string)

def byteStringToHex(byteString):
	if byteString == "":
		return ""
	output = 0
	copyString = byteString
	while len(copyString) > 0:
		output = output << 8
		output += ord(copyString[0])
		copyString = copyString[1:]
	toreturn = hex(output)[2:].rstrip("L")
	if len(toreturn)%2 != 0:
		return '0'+toreturn
	return toreturn

def byteStringToB64(byteString):
	return b64encode(byteString)

def intToByteString(integer, bigEndian = True):
	output = ""
	while (integer > 0):
		output = chr(integer & 255) + output if bigEndian else output + chr(integer & 255)
		integer = integer >> 8
	return output

def byteStringToInt(byteString, bigEndian = True):
	output = 0
	for char in byteString[::1 if bigEndian else -1]:
		output = output << 8
		output += ord(char)
		
	return output