OwlCyberSecurity - MANAGER
Edit File: crypto_box.cpython-38.pyc
U �֫[�% � @ s� d dl mZmZmZ d dlmZ d dlmZm Z d dl m Z ddgZ e � � Ze �� Ze �� Ze �� Ze �� Ze �� Ze �� Ze �� Z dd� Z dd � Z d d� Z d d � Z d d� Z!dd� Z"dd� Z#dd� Z$dd� Z%dS )� )�absolute_import�division�print_function)� exceptions)�ffi�lib)�ensure�crypto_box_keypair� crypto_boxc C s` t �dt�} t �dt�}t�| |�}t|dkdtjd� t � | t�dd� t � |t�dd� fS )zq Returns a randomly generated public and secret key. :rtype: (bytes(public_key), bytes(secret_key)) �unsigned char[]r �Unexpected library error�ZraisingN) r �new�crypto_box_PUBLICKEYBYTES�crypto_box_SECRETKEYBYTESr r r �exc� RuntimeError�buffer)�pk�sk�rc� r �:/usr/lib/python3/dist-packages/nacl/bindings/crypto_box.pyr # s ��c C s� t t| t�dtd� t| �tkr*t�d��t� dt �}t� dt �}t � ||| �}t |dkdtjd� t�|t �dd� t�|t �dd� fS )a Returns a (public, secret) keypair deterministically generated from an input ``seed``. .. warning:: The seed **must** be high-entropy; therefore, its generator **must** be a cryptographic quality random function like, for example, :func:`~nacl.utils.random`. .. warning:: The seed **must** be protected and remain secret. Anyone who knows the seed is really in possession of the corresponding PrivateKey. :param seed: bytes :rtype: (bytes(public_key), bytes(secret_key)) zseed must be bytesr z Invalid seedr r r N)r � isinstance�bytes� TypeError�len�crypto_box_SEEDBYTESr � ValueErrorr r r r r �crypto_box_seed_keypairr r )Zseedr r r r r r r 7 s � ��r c C s� t |�tkrt�d��t |�tkr,t�d��t |�tkrBt�d��dt | }t�dt |��}t � ||t |�|||�}t |dkdtj d� t� |t |��td � S ) z� Encrypts and returns a message ``message`` using the secret key ``sk``, public key ``pk``, and the nonce ``nonce``. :param message: bytes :param nonce: bytes :param pk: bytes :param sk: bytes :rtype: bytes �Invalid nonce size�Invalid public key�Invalid secret key� r r r r N)r �crypto_box_NONCEBYTESr r r r �crypto_box_ZEROBYTESr r r r r r r �crypto_box_BOXZEROBYTES)�message�noncer r �padded� ciphertextr r r r r ] s �c C s� t |�tkrt�d��t |�tkr,t�d��t |�tkrBt�d��dt | }t�dt |��}t � ||t |�|||�}t |dkdtj d� t� |t |��td � S ) a Decrypts and returns an encrypted message ``ciphertext``, using the secret key ``sk``, public key ``pk``, and the nonce ``nonce``. :param ciphertext: bytes :param nonce: bytes :param pk: bytes :param sk: bytes :rtype: bytes r r! r" r# r r �/An error occurred trying to decrypt the messager N)r r$ r r r r r& r r r �crypto_box_openr � CryptoErrorr r% )r* r( r r r) � plaintext�resr r r r, | s �r, c C sn t | �tkrt�d��t |�tkr,t�d��t�dt�}t� || |�}t |dkdtj d� t� |t�dd� S )a Computes and returns the shared key for the public key ``pk`` and the secret key ``sk``. This can be used to speed up operations where the same set of keys is going to be used multiple times. :param pk: bytes :param sk: bytes :rtype: bytes r! r" r r r r N) r r r r r r r �crypto_box_BEFORENMBYTESr �crypto_box_beforenmr r r )r r �kr r r r r1 � s �r1 c C s� t |�tkrt�d��t |�tkr,t�d��dt | }t�dt |��}t� ||t |�||�}t |dkdtj d� t� |t |��t d� S ) z� Encrypts and returns the message ``message`` using the shared key ``k`` and the nonce ``nonce``. :param message: bytes :param nonce: bytes :param k: bytes :rtype: bytes � Invalid nonce�Invalid shared keyr# r r r r N)r r$ r r r0 r% r r r �crypto_box_afternmr r r r& )r' r( r2 r) r* r r r r r5 � s �r5 c C s� t |�tkrt�d��t |�tkr,t�d��dt | }t�dt |��}t� ||t |�||�}t |dkdtj d� t� |t |��t d� S ) z� Decrypts and returns the encrypted message ``ciphertext``, using the shared key ``k`` and the nonce ``nonce``. :param ciphertext: bytes :param nonce: bytes :param k: bytes :rtype: bytes r3 r4 r# r r r+ r N)r r$ r r r0 r& r r r �crypto_box_open_afternmr r- r r% )r* r( r2 r) r. r/ r r r r6 � s" � �r6 c C s� t t| t�dtd� t t|t�dtd� t|�tkr>t�d��t| �}t| }t � d|�}t � || ||�}t |dkdtj d� t �||�dd� S ) a� Encrypts and returns a message ``message`` using an ephemeral secret key and the public key ``pk``. The ephemeral public key, which is embedded in the sealed box, is also used, in combination with ``pk``, to derive the nonce needed for the underlying box construct. :param message: bytes :param pk: bytes :rtype: bytes .. versionadded:: 1.2 zinput message must be bytesr �public key must be bytesr! r r r N)r r r r r r r r �crypto_box_SEALBYTESr r r �crypto_box_sealr r )r' r �_mlen�_clenr* r r r r r9 � s& � � �r9 c C s� t t| t�dtd� t t|t�dtd� t t|t�dtd� t|�tkrRt�d��t|�tkrht�d��t| �}|t }t � d|�}t � || |||�}t |dkd tjd� t �||�d d � S ) a� Decrypts and returns an encrypted message ``ciphertext``, using the recipent's secret key ``sk`` and the sender's ephemeral public key embedded in the sealed box. The box contruct nonce is derived from the recipient's public key ``pk`` and the sender's public key. :param ciphertext: bytes :param pk: bytes :param sk: bytes :rtype: bytes .. versionadded:: 1.2 z input ciphertext must be bytesr r7 zsecret key must be bytesr! r" r r r+ N)r r r r r r r r r r8 r r r �crypto_box_seal_openr- r )r* r r r; r: r. r/ r r r r< s0 � � � �r< N)&Z __future__r r r Znaclr r Z nacl._sodiumr r Znacl.exceptionsr �__all__Zcrypto_box_secretkeybytesr Zcrypto_box_publickeybytesr Zcrypto_box_seedbytesr Zcrypto_box_noncebytesr$ Zcrypto_box_zerobytesr% Zcrypto_box_boxzerobytesr& Zcrypto_box_beforenmbytesr0 Zcrypto_box_sealbytesr8 r r r r, r1 r5 r6 r9 r< r r r r �<module> s* & &