File manager - Edit - /usr/lib/python3/dist-packages/cryptography/hazmat/backends/openssl/__pycache__/ciphers.cpython-310.pyc
Back
o g�e$ � @ s| d dl mZ d dlmZmZmZ d dlmZ d dlm Z e� ej �e� ej �e� ej �e� ej�G dd� de�����ZdS )� )�utils)� InvalidTag�UnsupportedAlgorithm�_Reasons)�ciphers)�modesc @ s� e Zd ZdZdZdZdd� Zdedefdd �Zdede fd d �Z defd d �Z dedefdd�Z deddfdd�Z e�d�ZdS )�_CipherContext� r i���?c C s� || _ || _|| _|| _d | _t| jtj�r | jjd | _ nd| _ | j j � � }| j j � || j j j�}| j j}z |t|�t|�f }W n tyY td�|j|rS|jn|�tj��w || j ||�}|| j j jkr�d�|�} |d urx| d�|�7 } | d�| j �� �7 } t| tj��t|tj�r�| j j �|j �} n2t|tj �r�| j j �|j �} n#t|tj �r�| j j �|j �} nt|tj �r�| j j �|j �} n| j j j} | j j �!||| j j j| j j j| j j j|�} | j �"| dk� | j j �#|t$|j%��} | j �"| dk� t|tj&��r=| j j �'|| j j j(t$| �| j j j�} | j �"| dk� |j)d u�r=| j j �'|| j j j*t$|j)�|j)�} | j �"| dk� |j)| _| j j �!|| j j j| j j j| j j �|j%�| |�} | j �"| dk� | j j �+|d� || _,d S )N� r z6cipher {} in {} mode is not supported by this backend.zcipher {0.name} zin {0.name} mode z_is not supported by this backend (Your version of OpenSSL may be too old. Current version: {}.)r )-�_backend�_cipher�_mode� _operation�_tag� isinstancer �BlockCipherAlgorithm� block_size�_block_size_bytes�_lib�EVP_CIPHER_CTX_new�_ffi�gc�EVP_CIPHER_CTX_free�_cipher_registry�type�KeyErrorr �format�namer �UNSUPPORTED_CIPHER�NULL�openssl_version_textr � ModeWithInitializationVector� from_buffer�initialization_vector� ModeWithTweak�tweak� ModeWithNonce�nonce�EVP_CipherInit_ex�openssl_assert� EVP_CIPHER_CTX_set_key_length�len�key�GCM�EVP_CIPHER_CTX_ctrl�EVP_CTRL_AEAD_SET_IVLEN�tag�EVP_CTRL_AEAD_SET_TAG�EVP_CIPHER_CTX_set_padding�_ctx) �self�backend�cipher�mode� operation�ctx�registry�adapter� evp_cipher�msg�iv_nonce�res� r@ �N/usr/lib/python3/dist-packages/cryptography/hazmat/backends/openssl/ciphers.py�__init__ s� � ��� � � � �� �� z_CipherContext.__init__�data�returnc C s2 t t|�| j d �}| �||�}t|d |� �S )Nr )� bytearrayr+ r � update_into�bytes)r4 rC �buf�nr@ r@ rA �updatey s z_CipherContext.updatec C s� t |�}t |�|| j d k r td�t |�| j d ���d}d}| jj�d�}| jjj|dd�}| jj�|�}||kr}|| } || } t| j || �} | jj � | j | || | �} | dkrgt | jtj�rgtd��| j�| dk� || 7 }||d 7 }||ks<|S )Nr z1buffer must be at least {} bytes for this payloadr �int *T)�require_writablezeIn XTS mode you must supply at least a full block in the first update call. For AES this is 16 bytes.)r+ r � ValueErrorr r r �newr" �min�_MAX_CHUNK_SIZEr �EVP_CipherUpdater3 r r r �XTSr) ) r4 rC rH �total_data_len�data_processed� total_out�outlen� baseoutbuf� baseinbuf�outbuf�inbuf�inlenr? r@ r@ rA rF ~ s6 � �� �z_CipherContext.update_intoc C s� | j | jkrt| jtj�r| jd u rtd��| jj � d| j �}| jj � d�}| jj � | j||�}|dkro| j�� }|sDt| jtj�rDt�| jj|d �| jj j| jj j�pg| jj jog|d �| jj j| jj j�|d� td��t| jtj�r�| j | jkr�| jj � d| j �}| jj �| j| jj j| j |�}| j�|dk� | jj � |�d d � | _ | jj � | j�}| j�|dk� | jj � |�d |d � S )Nz4Authentication tag must be provided when decrypting.zunsigned char[]rK r )�errorszFThe length of the provided data is not a multiple of the block length.r ) r �_DECRYPTr r r �ModeWithAuthenticationTagr0 rM r r rN r r �EVP_CipherFinal_exr3 �_consume_errorsr- r r) �_lib_reason_match� ERR_LIB_EVP�'EVP_R_DATA_NOT_MULTIPLE_OF_BLOCK_LENGTH�Cryptography_HAS_PROVIDERS� ERR_LIB_PROV� PROV_R_WRONG_FINAL_BLOCK_LENGTH�_ENCRYPTr. �EVP_CTRL_AEAD_GET_TAG�bufferr �EVP_CIPHER_CTX_reset)r4 rH rV r? r\ �tag_bufr@ r@ rA �finalize� s\ � � � ��� � ��z_CipherContext.finalizer0 c C s` t |�| jjk rtd�| jj���| jj�| j| jjj t |�|�}| j� |dk� || _ | � � S )Nz.Authentication tag must be {} bytes or longer.r ) r+ r �_min_tag_lengthrM r r r r. r3 r1 r) r rl )r4 r0 r? r@ r@ rA �finalize_with_tag� s ���z _CipherContext.finalize_with_tagNc C sN | j j�d�}| j j�| j| j jj|| j j�|�t|��}| j � |dk� d S )NrK r ) r r rN r rQ r3 r r" r+ r) )r4 rC rV r? r@ r@ rA � authenticate_additional_data� s �z+_CipherContext.authenticate_additional_datar )�__name__� __module__� __qualname__rg r] rP rB rG rJ �intrF rl rn ro r �read_only_propertyr0 r@ r@ r@ rA r s d": r N)� cryptographyr �cryptography.exceptionsr r r � cryptography.hazmat.primitivesr �&cryptography.hazmat.primitives.ciphersr �register_interface� CipherContext�AEADCipherContext�AEADEncryptionContext�AEADDecryptionContext�objectr r@ r@ r@ rA �<module> s
| ver. 1.4 |
Github
|
.
| PHP 8.2.28 | Generation time: 0.02 |
proxy
|
phpinfo
|
Settings