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o ;j � @ s( d dgZ ddlT ddd �Zddd�ZdS ) �pad�unpad� )�*�pkcs7c C s� |t | �| }|dkrt|�| }| | S |dkr*td�|d t|� }| | S |dkr>td�td�|d }| | S td��)a� Apply standard padding. Args: data_to_pad (byte string): The data that needs to be padded. block_size (integer): The block boundary to use for padding. The output length is guaranteed to be a multiple of :data:`block_size`. style (string): Padding algorithm. It can be *'pkcs7'* (default), *'iso7816'* or *'x923'*. Return: byte string : the original data with the appropriate padding added at the end. r �x923r � �iso7816� �Unknown padding style)�len�bchr� ValueError)Z data_to_pad� block_size�style� padding_len�padding� r �K/opt/saltstack/salt/lib/python3.10/site-packages/Cryptodome/Util/Padding.pyr ' s ���c C s. t | �}|dkr td��|| rtd��|dv rWt| d �}|dk s)|t||�kr-td��|dkrC| | d � t|�| krBtd ��nM| | d� td�|d krVtd ��n9|d kr�|| �td �� }|dk so|t||�krstd��|dkr�| d| d � td�|d kr�td��ntd��| d | � S )a� Remove standard padding. Args: padded_data (byte string): A piece of data with padding that needs to be stripped. block_size (integer): The block boundary to use for padding. The input length must be a multiple of :data:`block_size`. style (string): Padding algorithm. It can be *'pkcs7'* (default), *'iso7816'* or *'x923'*. Return: byte string : data without padding. Raises: ValueError: if the padding is incorrect. r z$Zero-length input cannot be unpaddedzInput data is not padded)r r ���r zPadding is incorrect.r Nz PKCS#7 padding is incorrect.z ANSI X.923 padding is incorrect.r r z ISO 7816-4 padding is incorrect.r )r r Zbord�minr �rfind)Z padded_datar r Z pdata_lenr r r r r E s2 � �(�N)r )�__all__ZCryptodome.Util.py3compatr r r r r r �<module> s !
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