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d� ZdS )zqHMAC (Keyed-Hashing for Message Authentication) 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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key: bytes or buffer, key for the keyed hash object.
msg: bytes or buffer, Initial input for the hash or None.
digestmod: A hash name suitable for hashlib.new(). *OR*
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Required as of 3.8, despite its position after the optional
msg argument. Passing it as a keyword argument is
recommended, though not required for legacy API reasons.
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����� �zHMAC._init_oldc C s | j r| j jS d| jj� �S )Nzhmac-)r �namer )r# r r r rH n s z HMAC.namec C s | j p| j}|�|� dS )z,Feed data from msg into this hashing object.N)r r rC )r# r% �instr r r rC u s z HMAC.updatec C sZ | j �| j �}| j|_| jr | j�� |_d |_|_|S d|_| j�� |_| j�� |_|S )zyReturn a separate copy of this hashing object.
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updating the object after calling this function.
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r r c C s t | ||�S )a� Create a new hashing object and return it.
key: bytes or buffer, The starting key for the hash.
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A module supporting PEP 247.
Required as of 3.8, despite its position after the optional
msg argument. Passing it as a keyword argument is
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You can now feed arbitrary bytes into the object using its update()
method, and can ask for the hash value at any time by calling its digest()
or hexdigest() methods.
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aJ Fast inline implementation of HMAC.
key: bytes or buffer, The key for the keyed hash object.
msg: bytes or buffer, Input message.
digest: A hash name suitable for hashlib.new() for best performance. *OR*
A hashlib constructor returning a new hash object. *OR*
A module supporting PEP 247.
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