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a n�h�+ � @ sj U d dl mZmZmZmZ d dlmZ d dlm Z m Z d dl m Z e � � Zeed< e �� Zeed< e �� Zeed< e �� Zeed< e �� Zeed < e �� Zeed < e �� Z eed < e � � Z eed < e � � Z eed < e!d�dd�Z"G dd� d�Z#e#e!e!d�dd�Z$defe#e!ee! ee!d�dd�Z%e#e!e!dd�dd �Z&d#e#e!ee! ee!ef d �d d �Z'e#dd �d!d"�Z(dS )$� )� ByteString�Optional�Tuple�cast)� exceptions)�ffi�lib)�ensure�,crypto_secretstream_xchacha20poly1305_ABYTES�1crypto_secretstream_xchacha20poly1305_HEADERBYTES�.crypto_secretstream_xchacha20poly1305_KEYBYTES�6crypto_secretstream_xchacha20poly1305_MESSAGEBYTES_MAX�0crypto_secretstream_xchacha20poly1305_STATEBYTES�1crypto_secretstream_xchacha20poly1305_TAG_MESSAGE�.crypto_secretstream_xchacha20poly1305_TAG_PUSH�/crypto_secretstream_xchacha20poly1305_TAG_REKEY�/crypto_secretstream_xchacha20poly1305_TAG_FINAL��returnc C s( t �dt�} t�| � t �| �dd� S )zd Generate a key for use with :func:`.crypto_secretstream_xchacha20poly1305_init_push`. �unsigned char[]N)r �newr r �,crypto_secretstream_xchacha20poly1305_keygen�buffer)Zkeybuf� r ��/root/rpmbuild/BUILDROOT/imh-python39-modules-3.9.7-92.el8.x86_64/opt/imh-python/lib/python3.9/site-packages/nacl/bindings/crypto_secretstream.pyr 4 s � r c @ s& e Zd ZdZg d�Zdd�dd�ZdS )�+crypto_secretstream_xchacha20poly1305_statezN An object wrapping the crypto_secretstream_xchacha20poly1305 state. )�statebuf�rawbuf�tagbufNr c C s t �dt�| _d| _d| _dS )z Initialize a clean state object.r N)r r r r r r )�selfr r r �__init__J s �z4crypto_secretstream_xchacha20poly1305_state.__init__)�__name__� __module__� __qualname__�__doc__� __slots__r r r r r r B s r )�state�keyr c C s� t t| t�dtjd� t t|t�dtjd� t t|�tkdtjd� t � dt �}t � | j||�}t |dkdtjd� t �|�dd� S ) a\ Initialize a crypto_secretstream_xchacha20poly1305 encryption buffer. :param state: a secretstream state object :type state: crypto_secretstream_xchacha20poly1305_state :param key: must be :data:`.crypto_secretstream_xchacha20poly1305_KEYBYTES` long :type key: bytes :return: header :rtype: bytes �BState must be a crypto_secretstream_xchacha20poly1305_state object�Zraising� Key must be a bytes sequence�Invalid key lengthzunsigned char []r �Unexpected failureN)r � isinstancer �exc� TypeError�bytes�lenr � ValueErrorr r r r �/crypto_secretstream_xchacha20poly1305_init_pushr � RuntimeErrorr )r& r' Z headerbuf�rcr r r r3 U s0 �� ���r3 N)r& �m�ad�tagr c C s� t t| t�dtjd� t t|t�dtjd� t t|�tkdtjd� t |du pVt|t�dtjd� t|�t }| j du s�t| j �|k r�t � d|�| _ |du r�t j }d}nt|�}t�| j| j t j |t|�|||�}t |dkd tjd� t �| j |�dd� S ) a� Add an encrypted message to the secret stream. :param state: a secretstream state object :type state: crypto_secretstream_xchacha20poly1305_state :param m: the message to encrypt, the maximum length of an individual message is :data:`.crypto_secretstream_xchacha20poly1305_MESSAGEBYTES_MAX`. :type m: bytes :param ad: additional data to include in the authentication tag :type ad: bytes or None :param tag: the message tag, usually :data:`.crypto_secretstream_xchacha20poly1305_TAG_MESSAGE` or :data:`.crypto_secretstream_xchacha20poly1305_TAG_FINAL`. :type tag: int :return: ciphertext :rtype: bytes r( r) zMessage is not byteszMessage is too longN�%Additional data must be bytes or Noner r r, )r r- r r. r/ r0 r1 r r2 r r r r �NULLr �*crypto_secretstream_xchacha20poly1305_pushr r4 r )r& r6 r7 r8 Zclen�adlenr5 r r r r; � sF � �� � r; )r& �headerr' r c C s� t t| t�dtjd� t t|t�dtjd� t t|�tkdtjd� t t|t�dtjd� t t|�t kdtjd� | j du r�t � d�| _ t �| j||�}t |d kd tjd� dS ) a� Initialize a crypto_secretstream_xchacha20poly1305 decryption buffer. :param state: a secretstream state object :type state: crypto_secretstream_xchacha20poly1305_state :param header: must be :data:`.crypto_secretstream_xchacha20poly1305_HEADERBYTES` long :type header: bytes :param key: must be :data:`.crypto_secretstream_xchacha20poly1305_KEYBYTES` long :type key: bytes r( r) z Header must be a bytes sequencezInvalid header lengthr* r+ Nzunsigned char *r r, )r r- r r. r/ r0 r1 r r2 r r r r r �/crypto_secretstream_xchacha20poly1305_init_pullr r4 )r& r= r' r5 r r r r> � s> �� �� � �r> )r& �cr7 r c C sD t t| t�dtjd� t | jdudtjd� t t|t�dtjd� t t|�t kdtjd� t t|�t t kdtjd� t |du p�t|t�dtjd� t|�t }| j du s�t| j �|k r�t � d |�| _ |du r�t j}d }nt|�}t�| j| j t j| j|t|�||�}t |d kd tjd� t �| j |�dd� ttt| j�d �fS ) aM Read a decrypted message from the secret stream. :param state: a secretstream state object :type state: crypto_secretstream_xchacha20poly1305_state :param c: the ciphertext to decrypt, the maximum length of an individual ciphertext is :data:`.crypto_secretstream_xchacha20poly1305_MESSAGEBYTES_MAX` + :data:`.crypto_secretstream_xchacha20poly1305_ABYTES`. :type c: bytes :param ad: additional data to include in the authentication tag :type ad: bytes or None :return: (message, tag) :rtype: (bytes, int) r( r) NzOState must be initialized using crypto_secretstream_xchacha20poly1305_init_pullzCiphertext is not byteszCiphertext is too shortzCiphertext is too longr9 r r r, )r r- r r. r/ r r2 r0 r1 r r r r r r: r �*crypto_secretstream_xchacha20poly1305_pullr r4 r �intr )r& r? r7 �mlenr< r5 r r r r@ � sn ��� ���� � � �r@ )r& r c C s& t t| t�dtjd� t�| j� dS )a� Explicitly change the encryption key in the stream. Normally the stream is re-keyed as needed or an explicit ``tag`` of :data:`.crypto_secretstream_xchacha20poly1305_TAG_REKEY` is added to a message to ensure forward secrecy, but this method can be used instead if the re-keying is controlled without adding the tag. :param state: a secretstream state object :type state: crypto_secretstream_xchacha20poly1305_state r( r) N)r r- r r. r/ r �+crypto_secretstream_xchacha20poly1305_rekeyr )r& r r r rC Q s �rC )N))�typingr r r r Znaclr r. Z nacl._sodiumr r Znacl.exceptionsr Z,crypto_secretstream_xchacha20poly1305_abytesr rA �__annotations__Z1crypto_secretstream_xchacha20poly1305_headerbytesr Z.crypto_secretstream_xchacha20poly1305_keybytesr Z6crypto_secretstream_xchacha20poly1305_messagebytes_maxr Z0crypto_secretstream_xchacha20poly1305_statebytesr Z1crypto_secretstream_xchacha20poly1305_tag_messager Z.crypto_secretstream_xchacha20poly1305_tag_pushr Z/crypto_secretstream_xchacha20poly1305_tag_rekeyr Z/crypto_secretstream_xchacha20poly1305_tag_finalr r0 r r r3 r; r> r@ rC r r r r �<module> sd � � � � � � � � � � /�� D� 8 � � Y�
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