File manager - Edit - /opt/saltstack/salt/lib/python3.10/site-packages/Cryptodome/Cipher/__pycache__/_mode_kwp.cpython-310.pyc
Back
o ;jc � @ sb d dl Z d dlmZ d dlmZ ddlmZmZ G dd� de�Z ded ee e f d e fd d �Z dS ) � N)� ModuleType)�Union� )�W� W_inversec @ s^ e Zd ZdZdedeeef fdd�Zdeeef defdd �Z d eeef defd d �Z d S )�KWPModea Key Wrap with Padding (KWP) 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� zXKey Wrap with Padding mode is only available for ciphers that operate on 128 bits blocksF)� block_size� ValueError�_factory�newZMODE_ECB�_cipher�_done)�selfr r � r �O/opt/saltstack/salt/lib/python3.10/site-packages/Cryptodome/Cipher/_mode_kwp.py�__init__ s zKWPMode.__init__� plaintext�returnc C s� | j rtd��t|�dkrtd��t|�dkrtd��dt|� d }|d| }dt�d t|�� }t|�dkrC| j�|| �}|S t| j|| �}|S ) z�Encrypt and authenticate (wrap) a cryptographic key. Args: plaintext: The cryptographic key to wrap. Returns: The wrapped key. �(The cipher cannot be used more than oncer z%The plaintext must be at least 1 bytel zThe plaintext is too long� � � �YY��>I)r r �len�struct�packr Zencryptr )r r �padlenZpaddedZAIV�resr r r �seal' s �z KWPMode.seal� ciphertextc C s� | j rtd��t|�d rtd��t|�dk rtd��t|�dkr(| j�|�}nt| j|�}|dd� dkr:td ��t�d |dd� �d }t|�d | }|d k sV|d krZtd ��|t|�| d� d | krltd ��|dt|�| � S )aw Decrypt and authenticate (unwrap) a cryptographic key. Args: ciphertext: The cryptographic key to unwrap. It must be at least 16 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 bytesr z-The ciphertext must be at least 24 bytes longN� r zIncorrect decryptionr r � r )r r r r Zdecryptr r �unpack)r r" �SZPlenr r r r �unsealG s$ zKWPMode.unsealN) �__name__� __module__� __qualname__�__doc__r r �bytes� bytearrayr r! r' r r r r r s � � r r �kwargsr c K s@ z|d }W n t y } ztdt|� ��d}~ww t| |�S )a% Create a new block cipher in Key Wrap with Padding 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. r zMissing parameter:N)�KeyError� TypeError�strr )r r. r �er r r �_create_kwp_ciphert s �� r3 ) r �typesr �typingr Z_mode_kwr r �objectr r, r- r3 r r r r �<module> s k ��
| ver. 1.4 |
Github
|
.
| PHP 8.2.30 | Generation time: 0 |
proxy
|
phpinfo
|
Settings