OwlCyberSecurity - MANAGER
Edit File: crypto_secretstream.cpython-38.pyc
U �֫[�( � @ s� d dl mZmZmZ d dlmZ d dlmZm Z d dl m Z e � � Z e �� Ze �� Ze �� Ze �� Ze �� Ze �� Ze �� Ze � � Z dd� Z G dd� de �Z d d � Z!d efd d �Z"dd� Z#ddd�Z$dd� Z%d S )� )�absolute_import�division�print_function)� exceptions)�ffi�lib)�ensurec 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 �new�.crypto_secretstream_xchacha20poly1305_KEYBYTESr �,crypto_secretstream_xchacha20poly1305_keygen�buffer)Zkeybuf� r �C/usr/lib/python3/dist-packages/nacl/bindings/crypto_secretstream.pyr , s � r c @ s" e Zd ZdZdddgZdd� ZdS )�+crypto_secretstream_xchacha20poly1305_statezN An object wrapping the crypto_secretstream_xchacha20poly1305 state. �statebuf�rawbuf�tagbufc C s t �dt�| _d| _d| _dS )z! Initialize a clean state object.r N)r r �0crypto_secretstream_xchacha20poly1305_STATEBYTESr r r )�selfr r r �__init__A s �z4crypto_secretstream_xchacha20poly1305_state.__init__N)�__name__� __module__� __qualname__�__doc__� __slots__r r r r r r : s r 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 �1crypto_secretstream_xchacha20poly1305_HEADERBYTESr �/crypto_secretstream_xchacha20poly1305_init_pushr � RuntimeErrorr )�state�keyZ headerbuf�rcr r r r( L s4 �� �� �r( Nc C s� t t| t�dtjd� t t|t�dtjd� t t|�tkdtjd� t |dkpVt|t�dtjd� t|�t }| j dks�t| j �|k r�t � d|�| _ |dkr�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# r$ r% �6crypto_secretstream_xchacha20poly1305_MESSAGEBYTES_MAXr& �,crypto_secretstream_xchacha20poly1305_ABYTESr r r �NULLr �*crypto_secretstream_xchacha20poly1305_pushr r) r )r* �m�ad�tagZclen�adlenr, r r r r1 u sF � �� �r1 c C s� t t| t�dtjd� t t|t�dtjd� t t|�tkdtjd� t t|t�dtjd� t t|�t kdtjd� | j dkr�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# r$ r% r' r& r r r r r �/crypto_secretstream_xchacha20poly1305_init_pullr r) )r* �headerr+ r, r r r r6 � sB �� �� � �r6 c C s> t t| t�dtjd� t | jdk dtjd� t t|t�dtjd� t t|�t kdtjd� t t|�t t kdtjd� t |dkp�t|t�dtjd� t|�t }| j dks�t| j �|k r�t � d |�| _ |dkr�t j}d }nt|�}t�| j| j t j| j|t|�||�}t |d kd tjd� t �| j |�dd� t| jd �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 longr- r r r )r r! r r" r# r r& r$ r% r/ r. r r r r0 r �*crypto_secretstream_xchacha20poly1305_pullr r) r �int)r* �cr3 Zmlenr5 r, r r r r8 � sj ��� ����� �r8 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 r; 1 s �r; )N)&Z __future__r r r Znaclr r" Z nacl._sodiumr r Znacl.exceptionsr Z,crypto_secretstream_xchacha20poly1305_abytesr/ Z1crypto_secretstream_xchacha20poly1305_headerbytesr' Z.crypto_secretstream_xchacha20poly1305_keybytesr Z6crypto_secretstream_xchacha20poly1305_messagebytes_maxr. Z0crypto_secretstream_xchacha20poly1305_statebytesr Z1crypto_secretstream_xchacha20poly1305_tag_messageZ1crypto_secretstream_xchacha20poly1305_TAG_MESSAGEZ.crypto_secretstream_xchacha20poly1305_tag_pushZ.crypto_secretstream_xchacha20poly1305_TAG_PUSHZ/crypto_secretstream_xchacha20poly1305_tag_rekeyZ/crypto_secretstream_xchacha20poly1305_TAG_REKEYZ/crypto_secretstream_xchacha20poly1305_tag_finalZ/crypto_secretstream_xchacha20poly1305_TAG_FINALr �objectr r( r1 r6 r8 r; r r r r �<module> s< ���������,� @0 L