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o ;jf � @ s� d dl Z d dlmZ d dlmZ d dlmZ d dlmZ dedee e f de fd d �Z ded ee e f de fd d �Z G dd� de �Zdedee e f defdd�ZdS )� N)�deque)� ModuleType)�Union)�strxor�cipher� plaintext�returnc s� � fdd�t dt� �d�D �}t|�}d|d }|d }t|dd � �}t d|d �D ]#}t�d|�}| �||�� �} t| d d� |�}|�| dd � � q,|d� |� S ) Nc � g | ] }� ||d � �qS �� � ��.0�i�r r �N/opt/saltstack/salt/lib/python3.10/site-packages/Cryptodome/Cipher/_mode_kw.py� <listcomp> � zW.<locals>.<listcomp>r r � � �>Q� ) �range�lenr �struct�packZencrypt�popleftr �append�join) r r �S�n�s�A�R�t�t_64�ctr r r �W s r' � ciphertextc s� � fdd�t dt� �d�D �}t|�}d|d }|d }t|dd � �}t |dd�D ]#}t�d|�}| �t||�|�� �} | d d� }|�| dd � � q+|d � |� S ) Nc r r r r �r( r r r r z W_inverse.<locals>.<listcomp>r r r r ���r r ) r r r r r Zdecryptr �pop� appendleftr ) r r( �Cr r! r" r# r$ r% �ptr r) r � W_inverse s r/ c @ s^ e Zd ZdZdedeeef fdd�Zdeeef defdd �Z d eeef defd d �Z d S )�KWModea Key Wrap (KW) mode. This is a deterministic Authenticated Encryption (AE) mode for protecting cryptographic keys. See `NIST SP800-38F`_. It provides both confidentiality and authenticity, and it designed so that any bit of the ciphertext depends on all bits of the plaintext. This mode is only available for ciphers that operate on 128 bits blocks (e.g., AES). .. _`NIST SP800-38F`: http://csrc.nist.gov/publications/nistpubs/800-38F/SP-800-38F.pdf :undocumented: __init__ �factory�keyc C s: |j | _ | j dkr td��|| _|�||j�| _d| _d S )N� zKKey Wrap mode is only available for ciphers that operate on 128 bits blocksF)� block_size� ValueError�_factory�newZMODE_ECB�_cipher�_done)�selfr1 r2 r r r �__init__? s zKWMode.__init__r r c C sd | j rtd��t|�d rtd��t|�dk rtd��t|�dkr%td��t| jd| �}d | _ |S ) a Encrypt and authenticate (wrap) a cryptographic key. Args: plaintext: The cryptographic key to wrap. It must be at least 16 bytes long, and its length must be a multiple of 8. Returns: The wrapped key. �(The cipher cannot be used more than oncer z2The plaintext must have length multiple of 8 bytesr3 z,The plaintext must be at least 16 bytes longl zThe plaintext is too long� ��������T)r9 r5 r r' r8 )r: r �resr r r �sealL s z KWMode.sealr( c C sl | j rtd��t|�d rtd��t|�dk rtd��t| j|�}|dd� dkr-td��d | _ |dd� S ) aw Decrypt and authenticate (unwrap) a cryptographic key. Args: ciphertext: The cryptographic key to unwrap. It must be at least 24 bytes long, and its length must be a multiple of 8. Returns: The original key. Raises: ValueError If the ciphertext or the key are not valid. r< r z3The ciphertext must have length multiple of 8 bytes� z-The ciphertext must be at least 24 bytes longNr= z Incorrect integrity check valueT)r9 r5 r r/ r8 )r: r( r. r r r �unseali s z KWMode.unsealN) �__name__� __module__� __qualname__�__doc__r r �bytes� bytearrayr; r? rA r r r r r0 . s � � r0 r1 �kwargsc K s@ z|d }W n t y } ztdt|� ��d}~ww t| |�S )a Create a new block cipher in Key Wrap mode. Args: factory: A block cipher module, taken from `Cryptodome.Cipher`. The cipher must have block length of 16 bytes, such as AES. Keywords: key: The secret key to use to seal or unseal. r2 zMissing parameter:N)�KeyError� TypeError�strr0 )r1 rH r2 �er r r �_create_kw_cipher� s �� rM )r � collectionsr �typesr �typingr ZCryptodome.Util.strxorr rF rG r' r/ �objectr0 rM r r r r �<module> s* � � � �] ��
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