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o G%@i� � @ s6 d dl Z d dlZd dlZd dlmZ G dd� d�ZdS )� N)�Pathc @ s| e Zd ZdZg Zg ZdZdZdZdd� Z dd� Z dd � Z d d � Z d d � Z dd� Zdd� Zdd� Zdd� Zdd� Zdd� ZdS )�SoSMapz�Standardized way to store items with their obfuscated counterparts. Each type of sanitization that SoSCleaner supports should have a corresponding SoSMap() object, to allow for easy retrieval of obfuscated items. TFc C sJ i | _ t� | _g | _| jj�� | _|| _t j � | jd| j�| _ | � � d S )N� cleaner_cache)�dataset�set� _regexes_made�compiled_regexes� __class__�__name__�lower�cname�workdir�os�path�join� cache_dir� load_entries)�selfr � r �?/usr/lib/python3/dist-packages/sos/cleaner/mappings/__init__.py�__init__ s � zSoSMap.__init__c C s" t | j�jddd� | �d� dS )ai Load cached entries from the disk. This method must be called when we initialize a Map instance and whenever we want to retrieve self.dataset (e.g. to store default_mapping file). The later is essential since a concurrent Map can add more objects to the cache, so we need to update self.dataset up to date. Keep in mind that size of self.dataset is usually bigger than number of files in the corresponding cleaner's directory: directory contains just whole items (e.g. IP addresses) while dataset contains more derived objects (e.g. subnets). T)�parents�exist_ok� N)r r �mkdir�load_new_entries_from_dir)r r r r r , s zSoSMap.load_entriesc C sX |r|| j v s|| j�� v s| jrt|�dkrdS | jD ] }t�||tj�r) dS q dS )z�Some items need to be completely ignored, for example link-local or loopback addresses should not be obfuscated � TF) � skip_keysr �values�ignore_short_items�len�ignore_matches�re�match�I)r �item�skipr r r � ignore_item< s � �zSoSMap.ignore_itemc C sJ z | � |�| j|< W n ty || j|< Y nw | jr#| �|� d S d S )N)� sanitize_itemr � Exception�compile_regexes�add_regex_item�r r% r r r � add_sanitised_item_to_datasetH s ��z$SoSMap.add_sanitised_item_to_datasetc C s� d}|dkr_t j�| j|� �}t j�|�rQd}t|ddd�� }|�� }W d � n1 s-w Y | j�|d�s>| � |� |d7 }t j�| j|� �}t j�|�s|d8 }|d7 }|dksd S d S )N� r �r�utf-8��encodingFr ) r r r r �isfile�open�readr �getr- )r �counter� no_files_cnt�fname�fr% r r r r P s � � �z SoSMap.load_new_entries_from_dirc C s� | � |�r|S d}| j�|d�sh|s6tj| jd�}t|jddd�� }|�|� W d � n1 s1w Y z t | j�d }t � |jt j � | j|� �� | �|� W n ty` | �|� Y nw | j�|d�r| j| S )z�Add a particular item to the map, generating an obfuscated pair for it. Positional arguments: :param item: The plaintext object to obfuscate NF)�dir�wr0 r1 r )r' r r6 �tempfile�NamedTemporaryFiler r4 �name�writer r �linkr r r- �FileExistsErrorr )r r% �tmpfiler: r7 r r r �addf s( �� �� z SoSMap.addc C sV | � |�rdS || jvr)| j�|� | j�|| �|�f� | jjdd� dd� dS dS )z�Add an item to the regexes dict and then re-sort the list that the parsers will use during parse_line() :param item: The unobfuscated item to generate a regex for :type item: ``str`` Nc S s t | d �S )Nr )r )�xr r r �<lambda>� s z'SoSMap.add_regex_item.<locals>.<lambda>T)�key�reverse)r' r rD r �append�get_regex_result�sortr, r r r r+ � s �zSoSMap.add_regex_itemc C s2 | j r dt�|�� d�}nt�|�}t�|tj�S )a9 Generate the object/value that is used by the parser when iterating over pre-generated regexes during parse_line(). For most parsers this will simply be a ``re.Pattern()`` object, but for more complex parsers this can be overridden to provide a different object, e.g. a tuple, for that parer's specific iteration needs. :param item: The unobfuscated string to generate the regex for :type item: ``str`` :returns: A compiled regex pattern for the item :rtype: ``re.Pattern`` z (?<![a-z0-9])z (?=\b|_|-))�match_full_words_onlyr" �escape�compiler$ r, r r r rJ � s zSoSMap.get_regex_resultc C s |S )z�Perform the obfuscation relevant to the item being added to the map. This should be overridden by each type of map that subclasses SoSMap Positional arguments: :param item: The plaintext object to obfuscate r r, r r r r( � s zSoSMap.sanitize_itemc C s, | � |�r|S || jvr| �|�S | j| S )z�Retrieve an item's obfuscated counterpart from the map. If the item does not yet exist in the map, add it by generating one on the fly )r' r rD r, r r r r6 � s z SoSMap.getc C s | j �|� dS )a% Update the map using information from a previous run to ensure that we have consistent obfuscation between reports Positional arguments: :param config: A dict of mappings with the form of {clean_entry: 'obfuscated_entry'} N)r �update)r �configr r r � conf_update� s zSoSMap.conf_updateN)r � __module__� __qualname__�__doc__r! r r* r rL r r r' r- r rD r+ rJ r( r6 rQ r r r r r s$ r )r" r r= �pathlibr r r r r r �<module> s
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