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o ;jE � @ sl d dl mZ d dlmZmZmZ d dlmZ ddlm Z m Z ddl m Z m Z m Z G dd� de�Zd d � Zd S ) � )� unhexlify)�bord�tobytes�is_bytes)�get_random_bytes� )� cSHAKE128�SHA3_256)�_bytepad� _encode_str� _right_encodec @ sH e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd d � Z dd� Z dS )� KMAC_Hashz[A KMAC hash object. Do not instantiate directly. Use the :func:`new` function. c C sP d| | _ || _d | _ttt|��|�}|�||d�| _|r&| j�|� d S d S )Nz2.16.840.1.101.3.4.2.s KMAC) �oid� digest_size�_macr r r Z_new�_cshake�update) �self�data�key�mac_len�customZ oid_variantZcshakeZrateZ partial_newX� r �K/opt/saltstack/salt/lib/python3.10/site-packages/Cryptodome/Hash/KMAC128.py�__init__. s �zKMAC_Hash.__init__c C s | j rtd��| j�|� | S )z�Authenticate the next chunk of message. Args: data (bytes/bytearray/memoryview): The next chunk of the message to authenticate. z8You can only call 'digest' or 'hexdigest' on this object)r � TypeErrorr r )r r r r r r = s zKMAC_Hash.updatec C s2 | j s| j�t| jd �� | j�| j�| _ | j S )z�Return the **binary** (non-printable) MAC tag of the message. :return: The MAC tag. Binary form. :rtype: byte string � )r r r r r �read�r r r r �digestK s zKMAC_Hash.digestc C s d� dd� t| �� �D ��S )z�Return the **printable** MAC tag of the message. :return: The MAC tag. Hexadecimal encoded. :rtype: string � c S s g | ]}d t |� �qS )z%02x)r )�.0�xr r r � <listcomp>_ s z'KMAC_Hash.hexdigest.<locals>.<listcomp>)�join�tupler r r r r � hexdigestX s zKMAC_Hash.hexdigestc C sD t d�}t�|| �}t�|| �� �}|�� |�� kr td��dS )a` Verify that a given **binary** MAC (computed by another party) is valid. Args: mac_tag (bytes/bytearray/memoryview): the expected MAC of the message. Raises: ValueError: if the MAC does not match. It means that the message has been tampered with or that the MAC key is incorrect. � zMAC check failedN)r r �newr � ValueError)r Zmac_tagZsecretZmac1Zmac2r r r �verifya s �zKMAC_Hash.verifyc C s | � tt|��� dS )an Verify that a given **printable** MAC (computed by another party) is valid. Args: hex_mac_tag (string): the expected MAC of the message, as a hexadecimal string. Raises: ValueError: if the MAC does not match. It means that the message has been tampered with or that the MAC key is incorrect. N)r* r r )r Z hex_mac_tagr r r � hexverifyu s zKMAC_Hash.hexverifyc K s d|vr | j |d< tdi |��S )zNReturn a new instance of a KMAC hash object. See :func:`new`. r Nr )r r( )r �kwargsr r r r( � s z KMAC_Hash.newN) �__name__� __module__� __qualname__�__doc__r r r r& r* r+ r( r r r r r ( s r c K s� | � dd�}t|�std��t|�dk rtd��| � dd�}| � dd�}|d k r,td ��| � d d �}| r<td t| � ��t||||dtd�S )a� Create a new KMAC128 object. Args: key (bytes/bytearray/memoryview): The key to use to compute the MAC. It must be at least 128 bits long (16 bytes). data (bytes/bytearray/memoryview): Optional. The very first chunk of the message to authenticate. It is equivalent to an early call to :meth:`KMAC_Hash.update`. mac_len (integer): Optional. The size of the authentication tag, in bytes. Default is 64. Minimum is 8. custom (bytes/bytearray/memoryview): Optional. A customization byte string (``S`` in SP 800-185). Returns: A :class:`KMAC_Hash` hash object r Nz You must pass a key to KMAC128r' z1The key must be at least 128 bits long (16 bytes)r r �@ r z!'mac_len' must be 8 bytes or morer � zUnknown parameters: Z19� )�popr r �lenr) �strr r )r, r r r r r r r r( � s r( N)�binasciir ZCryptodome.Util.py3compatr r r ZCryptodome.Randomr r r r r r r �objectr r( r r r r �<module> s f
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