o
    i                     @  s*   d Z ddlmZ ddlZG dd dZdS )zPlaceholder encryption helpers for tenant secrets.

This is intentionally a lightweight reversible wrapper. It establishes the
module boundary now so the storage format can later be upgraded to a stronger
AES implementation without changing callers.
    )annotationsNc                   @  s.   e Zd ZdZdddZdd	d
ZdddZdS )PlaceholderAESCipherzSimple reversible cipher placeholder.

    This is not production-grade cryptography. It exists to define the API and
    should be replaced by a proper AES implementation before secrets are relied
    upon in production workflows.
    keystrreturnNonec                 C  s   | d| _d S )Nutf-8)encoder   )selfr    r   platform/secrets/encryption.py__init__   s   zPlaceholderAESCipher.__init__	plaintextc                   s4   | d}t fddt|D }t|dS )Nr   c                 3  ,    | ]\}}| j |t j   A V  qd S Nr   len.0indexbyter
   r   r   	<genexpr>      * z/PlaceholderAESCipher.encrypt.<locals>.<genexpr>ascii)r	   bytes	enumeratebase64urlsafe_b64encodedecode)r
   r   rawkeyedr   r   r   encrypt   s   
zPlaceholderAESCipher.encrypt
ciphertextc                   s4   t |d}t fddt|D }|dS )Nr   c                 3  r   r   r   r   r   r   r   r      r   z/PlaceholderAESCipher.decrypt.<locals>.<genexpr>r   )r   urlsafe_b64decoder	   r   r   r   )r
   r#   r    plainr   r   r   decrypt   s   
zPlaceholderAESCipher.decryptN)r   r   r   r   )r   r   r   r   )r#   r   r   r   )__name__
__module____qualname____doc__r   r"   r&   r   r   r   r   r      s
    

r   )r*   
__future__r   r   r   r   r   r   r   <module>   s    