文件操作 - _der.cpython-310.pyc
返回文件管理
返回主菜单
删除本文件
文件: /usr/lib/python3/dist-packages/cryptography/hazmat/__pycache__/_der.cpython-310.pyc
编辑文件内容
o �)%ae � @ s� d dl Z d dlmZ dZdZdZdZdZdZd Z d eB Z d eB Z d Z d Z dZG dd� de�Zdedefdd�Zdededefdd�ZdS )� N)� int_to_bytes� � � � � � � � � � � � c @ s� e Zd Zdd� Zdd� Zdd� Zdd� Zd d � Zd efd d �Z d e fdd�Z d e j ed f fdd�Zded d fdd�Zded d fdd�Zded e jd fdd�Zd efdd�ZdS ) � DERReaderc C s t |�| _d S �N)� memoryview�data)�selfr � r �:/usr/lib/python3/dist-packages/cryptography/hazmat/_der.py�__init__" � zDERReader.__init__c C s | S r r �r r r r � __enter__% s zDERReader.__enter__c C s |d u r | � � d S d S r )� check_empty)r �exc_type� exc_value�tbr r r �__exit__( s �zDERReader.__exit__c C s t | j�dkS �Nr )�lenr r r r r �is_empty, r zDERReader.is_emptyc C s | � � std��d S )Nz Invalid DER input: trailing data)r! � ValueErrorr r r r r / s �zDERReader.check_empty�returnc C s4 t | j�dk r td��| jd }| jdd � | _|S )N� �$Invalid DER input: insufficient datar �r r r" )r �retr r r � read_byte3 s zDERReader.read_bytec C s8 t | j�|k r td��| jd |� }| j|d � | _|S )Nr% r& )r �nr' r r r � read_bytes: s zDERReader.read_bytesc C s� | � � }|d@ dkrtd��| � � }|d@ dkr|}n/|dM }|dkr'td��d}t|�D ]}|dK }|| � � O }|dkrAtd��q-|dk rJtd��| �|�}|t|�fS ) N� z-Invalid DER input: unexpected high tag numberr r � z?Invalid DER input: indefinite length form is not allowed in DER� z3Invalid DER input: length was not minimally-encoded)r( r" �ranger* r )r �tag� length_byte�length�i�bodyr r r �read_any_elementA s4 � ��� zDERReader.read_any_element� expected_tagc C s | � � \}}||krtd��|S )Nz!Invalid DER input: unexpected tag)r4 r" )r r5 r/ r3 r r r � read_elemente s zDERReader.read_elementc C s2 | � | � |�W d � S 1 sw Y d S r )r6 �r r5 r r r �read_single_elementk s $�z DERReader.read_single_elementc C s* t | j�dkr| jd |kr| �|�S d S r )r r r6 r7 r r r �read_optional_elemento s z DERReader.read_optional_elementc C sv t | j�dkr td��| jd }|d@ dkrtd��t | j�dkr4| jd }|dkr4|d@ dkr4td��t�| jd�S )Nr z)Invalid DER input: empty integer contentsr z'Negative DER integers are not supportedr$ z0Invalid DER input: integer not minimally-encoded�big)r r r" �int� from_bytes)r �first�secondr r r � as_integerv s �zDERReader.as_integerN)�__name__� __module__� __qualname__r r r r! r r; r( r r* �typing�Tupler4 r6 r8 �Optionalr9 r? r r r r r ! s" $� �r �xr# c C s< t | t�s td��| dk rtd��| �� d d }t| |�S )NzValue must be an integerr z#Negative integers are not supportedr- r$ )� isinstancer; r" � bit_lengthr )rF r) r r r �encode_der_integer� s rI r/ �childrenc G s~ d}|D ]}|t |�7 }qt| g�g}|dk r |�t|g�� nt|�}|�tdt |�B g�� |�|� |�|� d�|�S )Nr r � )r �bytes�appendr �extend�join)r/ rJ r1 �child�chunks� length_bytesr r r � encode_der� s rS )rC �cryptography.utilsr � CONSTRUCTED�CONTEXT_SPECIFIC�INTEGER� BIT_STRING� OCTET_STRING�NULL�OBJECT_IDENTIFIER�SEQUENCE�SET�PRINTABLE_STRING�UTC_TIME�GENERALIZED_TIME�objectr r; rL rI rS r r r r �<module> s" f
修改文件时间
将文件时间修改为当前时间的前一年
删除文件