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e j�Zej� r�eZddd�ZdS )zxHMAC (Keyed-Hashing for Message Authentication) Python module.
Implements the HMAC algorithm as described by RFC 2104.
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dd� Zdd� ZdS )�HMACz~RFC 2104 HMAC class. Also complies with RFC 4231.
This supports the API for Cryptographic Hash Functions (PEP 247).
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d| j td� | j}|| _t|�|k�r| j|�j� }|j|d�}| jj|jt�� | jj|jt�� |dk �rb| j|� dS )a1 Create a new HMAC object.
key: key for the keyed hash object.
msg: Initial input for the hash, if provided.
digestmod: A module supporting PEP 247. *OR*
A hashlib constructor returning a new hash object. *OR*
A hash name suitable for hashlib.new().
Defaults to hashlib.md5.
Implicit default to hashlib.md5 is deprecated and will be
removed in Python 3.6.
Note: key and msg must be a bytes or bytearray objects.
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