b64

# author: phieulang1993
global charsets
# charsets = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
charsets = 'aABCDEFGHIJKLMNOPQRSTUVWXYZbcdefghijklmnopqrstuvwxyz0123456789+/'

def text2bin(text):
    return ''.join(format(ord(x), 'b').zfill(8) for x in text)

def b64_encode(text):
    bin = text2bin(text)
    c = ""
    for x in xrange(0,len(bin),6):
        pos = int(bin[x:x+6],2)
        c += charsets[pos]
    return c
def b64_decode(cipher):
    text = ""
    b = ""
    for c in cipher:
        pos = charsets.index(c)
        b += bin(pos)[2:].zfill(6)
    for x in xrange(0,len(b),8):
        text += chr(int(b[x:x+8],2))
    return text
print b64_encode('phieulang')
print b64_decode('cFhpYWUsXV5n')