utils.py 文件源码

def get_digest(value):
    """Return a hashlib digest algorithm from a string."""
    if not isinstance(value, str):
        return value
    value = value.lower()
    if value == "md5":
        return md5
    elif value == "sha1":
        return sha1
    elif value == "sha224":
        return sha224
    elif value == "sha256":
        return sha256
    elif value == "sha384":
        return sha384
    elif value == "sha512":
        return sha512
    else:
        raise ValueError("Invalid digest algorithm: %s" % value)