google-authenticator.py 文件源码

def normalize(key):
    """Normalizes secret by removing spaces and padding with = to a multiple of 8"""
    k2 = key.strip().replace(' ','')
    # k2 = k2.upper()   # skipped b/c b32decode has a foldcase argument
    if len(k2)%8 != 0:
        k2 += '='*(8-len(k2)%8)
    return k2