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a =�*f'2 � @ s0 d Z dZdZddlZddlZddlmZ ddlmZm Z m Z dd l m Z e e �Ze�d �Ze�d �d fZe�d �Ze�d�Ze�d�Ze�d�Ze�d�Ze�d�Ze�d�Ze�d�dd� fZe�d�Ze�d�Ze�d�Z e�dej �Z G dd � d e �Z G d d � d e �Z!G d d � d e �Z"G d!d"� d"e �Z#dS )#z Cyril Jaquierz Copyright (c) 2004 Cyril JaquierZGPL� N)�abstractmethod� )�reGroupDictStrptime�timeRE�getTimePatternRE� )� getLoggerz (?<!(?:\(\?))(?<!\\)\((?!\?)z-^((?:\(\?\w+\))?\^?(?:\(\?\w+\))?)(.*?)(\$?)$z\1(\2)\3z((?:^|(?!<\\))\(\?[a-z]+\))z^\{UNB\}z ^\{\^LN-BEG\}z^\((?:\?:)?\^\|\\b\|\\W\)z\(\?=\\b\|\\W\|\$\)$z-^\(*(?:\(\?\w+\))?(?:\^|\(*\*\*|\((?:\?:)?\^)z!(?<!\\)(?:\$\)?|\\b|\\s|\*\*\)*)$z)^\(*(?:\(\?\w+\))?\(*\*\*|(?<!\\)\*\*\)*$c C s | � � �dd�S )Nz**� )�group�replace)�m� r �@/usr/lib/python3.9/site-packages/fail2ban/server/datetemplate.py�<lambda>/ � r z(^(?:\(\?\w+\))?(?:\^|\((?:\?:)?\^(?!\|))z(?<![\\\|])(?:\$\)?)$z(?<!\%)\%[aAbBpc]z(?<!\\)\{L?EPOCH\}c @ sr e Zd ZdZdZdZdZdZdd� Zdd � Z dd d �Z e e e d d�Z dd� Z dd� Zeddd��Zedd� �ZdS )� DateTemplatez�A template which searches for and returns a date from a log line. This is an not functional abstract class which other templates should inherit from. Attributes ---------- name regex � � r r c C s. d| _ d| _d| _d| _d| _d| _d | _d S )Nr g �?r )�nameZweight�flags�hits�time�_regex�_cRegex��selfr r r �__init__J s zDateTemplate.__init__c C s | j S �N)r r r r r �getRegexS s zDateTemplate.getRegexTc C st |� � }t�|�}|r&tjd|dd�}|o4t�|� }|oDt�|� }t�|�sdtd �td |�}d| _|r�| j|dkr�t j nt j O _|dkr�d| }n d| }| j � d�s�d| j | _ |r�| jt jO _|d 7 }| jt j @ �st�|��r| jt j O _| jt j@ �s.t�|��r.| jt jO _td �td |�}|�rV|�d�| }|| _t�d d |� d | _d S ) a� Sets regex to use for searching for date in log line. Parameters ---------- regex : str The regex the template will use for searching for a date. wordBegin : bool Defines whether the regex should be modified to search at beginning of a word, by adding special boundary r'(?=^|\b|\W)' to start of regex. Can be disabled with specifying of ** at front of regex. Default True. wordEnd : bool Defines whether the regex should be modified to search at end of a word, by adding special boundary r'(?=\b|\W|$)' to end of regex. Can be disabled with specifying of ** at end of regex. Default True. Raises ------ re.error If regular expression fails to compile r r )�countr �startz (?=^|\b|\W)z ^(?:\W{0,2})?z {^LN-BEG}z (?=\b|\W|$)r z constructed regex %sN)�strip�RE_GLOBALFLAGS�search�sub�RE_NO_WRD_BOUND_BEG�RE_NO_WRD_BOUND_END� RE_GROUPED�RE_GROUPr r � WORD_BEGIN� LINE_BEGINr � startswith�WORD_END�RE_LINE_BOUND_BEG�LINE_END�RE_LINE_BOUND_END�RE_DEL_WRD_BOUNDSr r �logSys�logr )r �regex� wordBegin�wordEndZgfZ boundBeginZboundEndr r r �setRegexV s: zDateTemplate.setRegexz!Regex used to search for date. )�docc C sX | j sTzt�| j�| _ W n: tyR } z"t�d| j| j� |�W Y d}~n d}~0 0 dS )z Compile regex by first usage. z Compile %r failed, expression %rN)r �re�compiler3 � Exceptionr1 �errorr )r �er r r � _compileRegex� s zDateTemplate._compileRegexc G sH | j s| �� t�dd| j� | j j|g|�R � }|rD| jd7 _|S )z1Check if regex for date matches on a log line. r z search %sr )r r= r1 r2 r3 r# r )r �line�args� dateMatchr r r � matchDate� s zDateTemplate.matchDateNc C s t d��dS )aQ Abstract method, which should return the date for a log line This should return the date for a log line, typically taking the date from the part of the line which matched the templates regex. This requires abstraction, therefore just raises exception. Parameters ---------- line : str Log line, of which the date should be extracted from. default_tz: if no explicit time zone is present in the line passing this will interpret it as in that time zone. Raises ------ NotImplementedError Abstract method, therefore always returns this. zgetDate() is abstractN)�NotImplementedError�r r> r@ � default_tzr r r �getDate� s zDateTemplate.getDatec C s$ t �dt�dt�dt�d| ����S )Nr )�RE_EXEANC_BOUND_BEGr$ �RE_EXSANC_BOUND_BEG�RE_EXLINE_BOUND_BEG�RE_EXLINE_NO_BOUNDS)�patternr r r �unboundPattern� s ��zDateTemplate.unboundPattern)TT)NN)�__name__� __module__� __qualname__�__doc__r* r. r) r, r r r6 �propertyr3 r= rA r rE � staticmethodrK r r r r r 9 s" @� r c @ s$ e Zd ZdZddd�Zd dd�ZdS ) � DateEpochz�A date template which searches for Unix timestamps. This includes Unix timestamps which appear at start of a line, optionally within square braces (nsd), or on SELinux audit log lines. Attributes ---------- name regex FNc s� t �| � |sdn|| _|| _d| _d� |r>|s4dn|| _d� |r~t�� fdd�|�}t�|�sld| d }d | _| � |� n4|s�d � }| j |d d � nd� }| j |ddd� d S )NZEpochr z\d{10,11}\b(?:\.\d{3,6})?Z LongEpochz'\d{10,11}(?:\d{3}(?:\.\d{1,6}|\d{3})?)?c s d� S )Nz(%s)r )�v�ZepochREr r r � r z$DateEpoch.__init__.<locals>.<lambda>�(�)r zf((?:^|(?P<square>(?<=^\[))|(?P<selinux>(?<=\baudit\()))%s)(?:(?(selinux)(?=:\d+\)))|(?(square)(?=\])))F�r4 z*((?P<square>(?<=^\[))?%s)(?(square)(?=\]))r T)r4 r5 ) r r r �_longFrm�_grpIdx�RE_EPOCH_PATTERNr$ r' r# r6 )r Z lineBeginOnlyrJ ZlongFrmr3 r rT r r � s& zDateEpoch.__init__c C sn |s| � |�}|rj|�| j�}| jr^t|�dkr^t|�dkrRd|vrRt|�d }n t|�d }t|�|fS dS )ax Method to return the date for a log line. Parameters ---------- line : str Log line, of which the date should be extracted from. default_tz: ignored, Unix timestamps are time zone independent Returns ------- (float, str) Tuple containing a Unix timestamp, and the string of the date which was matched and in turned used to calculated the timestamp. � � �.i@B i� N)rA r rY rX �len�float)r r> r@ rD rS r r r rE � s zDateEpoch.getDate)FNF)NN�rL rM rN rO r rE r r r r rR � s rR c sh e Zd ZdZe� \ZZe�e�Zd � fdd� Z e dd� �Z e j dd� �Z d� fd d � Z dd d �Z� ZS )�DatePatternRegexz�Date template, with regex/pattern Parameters ---------- pattern : str Sets the date templates pattern. Attributes ---------- name regex pattern Nc s2 t t| ��� d | _|d ur.| j|fi |�� d S r )�superra r �_patternr6 )r rJ �kwargs�� __class__r r r ! s zDatePatternRegex.__init__c C s | j S )aV The pattern used for regex with strptime "%" time fields. This should be a valid regular expression, of which matching string will be extracted from the log line. strptime style "%" fields will be replaced by appropriate regular expressions, or custom regex groups with names as per the strptime fields can also be used instead. )rc r r r r rJ ' s zDatePatternRegex.patternc C s | � |� d S r )r6 )r rJ r r r rJ 3 s Tc s� || _ t�|�r$t�d|�}d }}|rBt�|�rBt�d|�}d}zL| j�d|�}|| j | _|t }t �|�rxd| }t t | �� |||� W n4 t y� } z td||f ��W Y d }~n d }~0 0 d S )Nr Fr z%(\1)sz(?iu)zWFailed to set datepattern '%s' (may be an invalid format or unescaped percent char): %s)rc rI r# r$ rH � _patternRE� _patternNamer r �RE_ALPHA_PATTERNrb ra r6 r: � TypeError)r rJ r4 r5 �fmtr3 r< re r r r6 7 s zDatePatternRegex.setRegexc C s* |s| � |�}|r&t|�� |d�|fS dS )a� Method to return the date for a log line. This uses a custom version of strptime, using the named groups from the instances `pattern` property. Parameters ---------- line : str Log line, of which the date should be extracted from. default_tz: optionally used to correct timezone Returns ------- (float, str) Tuple containing a Unix timestamp, and the string of the date which was matched and in turned used to calculated the timestamp. )rD N)rA r � groupdictrC r r r rE N s �zDatePatternRegex.getDate)N)TT)NN)rL rM rN rO r rg rh r8 r9 r rP rJ �setterr6 rE � __classcell__r r re r ra s ra c @ s$ e Zd ZdZddd�Zd dd�ZdS ) � DateTai64nz_A date template which matches TAI64N format timestamps. Attributes ---------- name regex Fc C s" t �| � d| _| jd|d� d S )NZTAI64Nz @[0-9a-f]{24}rW )r r r r6 )r r4 r r r r p s zDateTai64n.__init__Nc C s: |s| � |�}|r6|�d�}|dd� }t|d�|fS dS )aq Method to return the date for a log line. Parameters ---------- line : str Log line, of which the date should be extracted from. default_tz: ignored, since TAI is time zone independent Returns ------- (float, str) Tuple containing a Unix timestamp, and the string of the date which was matched and in turned used to calculated the timestamp. r r � r\ N)rA r �int)r r> r@ rD �valueZseconds_since_epochr r r rE v s zDateTai64n.getDate)F)NNr` r r r r ro g s ro )$� __author__Z __copyright__Z __license__r8 r �abcr �strptimer r r Zhelpersr rL r1 r9 r' r( r" rI rH rG rF r% r& r0 r- r/ ri � IGNORECASErZ �objectr rR ra ro r r r r �<module> s8 � ?X
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