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Edit File: ssh_util.cpython-310.pyc
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Each line of the file contains one key (empty (because of the size of the public key encoding) up to a limit of 8 kilo- bytes, which permits DSA keys up to 8 kilobits and RSA keys up to 16 kilobits. You don't want to type them in; instead, copy the identity.pub or the id_rsa.pub file and edit it. sshd enforces a minimum RSA key modulus size for protocol 1 and protocol 2 keys of 768 bits. The options (if present) consist of comma-separated option specifica- tions. No spaces are permitted, except within double quotes. The fol- lowing option specifications are supported (note that option keywords are case-insensitive): c C s� d}d}|t |�k rO|s|| dvrO|| }|d t |�kr#|d }n,||d }|dkr6|dkr6|d }n|dkr=| }|d }|t |�k rO|s|| dvs|d|� }||d� �� }||fS )z� The options (if present) consist of comma-separated option specifica- tions. No spaces are permitted, except within double quotes. Note that option keywords are case-insensitive. 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We need to check that: 1. If StrictMode is enabled, the owner is either root or the user 2. the user can access the file/folder, otherwise ssh won't use it 3. If StrictMode is enabled, no write permission is given to group and world users (022) i� i� �rootzXPath %s in %s must be own by user %s or by root, but instead is own by %s. Ignoring key.F� �8 � r zBPath %s in %s must be accessible by user %s, check its permissions� zRPath %s in %s must not give writepermission to group or world users. Ignoring key.T)r � get_ownerrH �debug�get_permissions� get_group�get_user_groups) rf � current_path� full_path�is_file� strictmodes�minimal_permissions�owner�parent_permission� group_owner� user_groupsr r r �check_permissions sJ � ��r� c C s� t | �d }t d�d }z�|�d�dd� }d}tj�|j�}|D ]�}|d| 7 }tj�|�r9t�d|� W dS tj� |�rIt�d|� W dS |� |�sS||jkrTq!tj� |�s�t � |��- d } |j} |j} |� |j�rvd } |j} |j} tj|| d d � t �|| | � W d � n1 s�w Y t| ||d|�} | s� W dS q!tj�|�s�tj�|�r�t�d |� W dS tj� |�s�t j|ddd d� t �||j|j� t| ||d |�} | s�W dS W d S ttfy� } zt �tt| �� W Y d } ~ dS d } ~ ww )Nr& rw rm ���r2 z-Invalid directory. Symlink exists in path: %sFz*Invalid directory. File exists in path: %s�� rx T)�mode�exist_okz%s is not a file!� )r� �ensure_dir_exists)rh r4 r@ rA �dirnamerd �islinkrH r} rB r9 �existsr � SeLinuxGuard�pw_uid�pw_gid�makedirs� chownbyidr� �isdir� write_filerE rF rG rV )rf �filenamer� � user_pwent� root_pwent� directories� parent_folder� home_folder� directoryr� �uid�gid� permissions�er r r �check_create_pathG sv � �� � �� �����r� c C s0 t | �\}}tj�|d�}|}g }tj|dd��; zt|�}|�dd�}|�dd�} t||j | �}W n t t fyK ||d< t� t d t|d � Y nw W d � n1 sVw Y t|�� |�D ]$\} } td | v d | v | �d �|j ��g�r�t| | | dk�} | r�| } nqb||kr�t �d |� |t|g�fS )N�authorized_keysT�� recursive�authorizedkeysfilerl r� �yesr zhFailed extracting 'AuthorizedKeysFile' in SSH config from %r, using 'AuthorizedKeysFile' file %r insteadrj ri z{}/zAAuthorizedKeysFile has an user-specific authorized_keys, using %s)rh r@ rA r r r� �parse_ssh_config_map�getrv rd rE rF rG rH � DEF_SSHD_CFG�zipr4 �anyr9 �formatr� r} rN ) rf � sshd_cfg_file�ssh_dirrg �default_authorizedkeys_file�user_authorizedkeys_file� auth_key_fns�ssh_cfg� key_pathsr� �key_path� auth_key_fn�permissions_okr r r �extract_authorized_keys� s^ � ���� ��� ����r� c C s� t � }g }| D ]}|�|jt|�|d�� qt|�\}}tj�|�}tj |dd�� t ||�} tj || dd� W d � d S 1 sBw Y d S )N)r Tr� �� preserve_mode) r$ r r> rV r� r@ rA r� r r� ra r� ) r^ rf r rK � key_entriesrQ r� �auth_key_entriesr� �contentr r r �setup_user_keys� s "�r� c @ s* e Zd Zddd�Zedd� �Zdd� ZdS ) �SshdConfigLineNc C s || _ || _|| _d S r )r< �_keyro )r r< rQ �vr r r r � s zSshdConfigLine.__init__c C s | j d u rd S | j �� S r )r� �lowerr r r r r` � s zSshdConfigLine.keyc C s: | j d u r t| j�S t| j �}| jr|dt| j� 7 }|S r )r� rV r< ro )r r� r r r r � s zSshdConfigLine.__str__)NN)r! r" r# r �propertyr` r r r r r r� � s r� �returnc C s" t j�| �sg S tt�| ��� �S r )r@ rA rB �parse_ssh_config_linesr rC rD �rM r r r �parse_ssh_config� s r� c C s� g }| D ]M}|� � }|r|�d�r|�t|�� qz |�d d�\}}W n$ tyG z |�dd�\}}W n tyD t�d|� Y Y qw Y nw |�t|||�� q|S )Nr1 r& �=z;sshd_config: option "%s" has no key/value pair, skipping it)r: r9 r r� r4 � ValueErrorrH r} )rJ �retr< r` �valr r r r� � s, ���� r� c C s6 t | �}|si S i }|D ] }|jsq |j||j< q |S r )r� r` ro )rM rJ r� r< r r r r� s r� rM c C sn t j�| �sdS t| d�� }|D ]}|�d| � d��r$ W d � dS qW d � dS 1 s0w Y dS )NF�rzInclude z .d/*.confT)r@ rA rB �openr9 )rM �fr< r r r �_includes_dconf" s �� ��r� c C s^ t | �r-tj�| � d��stj| � d�dd� tj�| � d�d�} tj�| �s-t�| d� | S )Nz.dr� )r� z50-cloud-init.confr� ) r� r@ rA r� r � ensure_dirr rB � ensure_filer� r r r �"_ensure_cloud_init_ssh_config_file, s r� c C sP t |�}t|�}t|| d�}|r"tj|d�dd� |D ��d dd� t|�dkS )z�Read fname, and update if changes are necessary. @param updates: dictionary of desired values {Option: value} @return: boolean indicating if an update was done.)rJ �updatesrY c S rT r rU )rP r< r r r rR B rX z%update_ssh_config.<locals>.<listcomp>Tr� r )r� r� �update_ssh_config_linesr r� r r( )r� rM rJ �changedr r r �update_ssh_config7 s � r� c C s t � }g }tdd� |�� D ��}t| dd�D ];\}}|js q|j|v rQ||j }|| }|�|� |j|kr?t�d|||� q|� |� t�d|||j|� ||_qt |�t |�kr�|� � D ]!\}}||v rgq^|� |� | � t d||�� t�dt | �||� q^|S ) z�Update the SSH config lines per updates. @param lines: array of SshdConfigLine. This array is updated in place. @param updates: dictionary of desired values {Option: value} @return: A list of keys in updates that were changed.c S s g | ]}|� � |f�qS r )r� rO r r r rR R rS z+update_ssh_config_lines.<locals>.<listcomp>r& )�startz$line %d: option %s already set to %sz#line %d: option %s updated %s -> %sr2 z line %d: option %s added with %s) �set�dictr^ � enumerater` �addro rH r} r r( �itemsr� ) rJ r� �foundr� �casemapr, r< r` ro r r r r� H sD � �� �r� rJ c C s> | sd S t |�}dd� | D �}tj|d�|�d ddd� d S )Nc s s" � | ] \}}|� d |� �V qdS )r Nr )rP rQ r� r r r � <genexpr>z s � z$append_ssh_config.<locals>.<genexpr>rY �abT)�omoder� )r� r r� r )rJ rM r� r r r �append_ssh_configv s �r� c C s� d} t tj�� tjddgddgd�\}} W d � n1 s w Y d}| �d �D ]}|�|�r?|t|�|�d �� S q+dS ) z�Get the full version of the OpenSSH sshd daemon on the system. On an ubuntu system, this would look something like: 1.2p1 Ubuntu-1ubuntu0.1 If we can't find `sshd` or parse the version number, return None. r2 �sshdz-Vr r& )�rcsN�OpenSSH_rY �,)r r �ProcessExecutionErrorr4 r9 r( �find)�err�_�prefixr< r r r �get_opensshd_version� s � �r� c C s� d} t � }|du rtj�| �S d|v r |d|�d�� } nd|v r+|d|�d�� } n|} z tj�| �} | W S ttfyH t�d| � Y dS w )z�Get the upstream version of the OpenSSH sshd daemon on the system. This will NOT include the portable number, so if the Ubuntu version looks like `1.2p1 Ubuntu-1ubuntu0.1`, then this function would return `1.2` z9.0N�pr z Could not parse sshd version: %s) r� r �Version�from_strr� r� r5 rH �warning)�upstream_version� full_versionr r r � get_opensshd_upstream_version� s �r� r )+�loggingr@ rb � contextlibr �typingr r r � cloudinitr r r � getLoggerr! rH r� r6 �_DISABLE_USER_SSH_EXITrV �DISABLE_USER_OPTSr r$ rN ra rh rv r� r� r� r� r� r� r� r� �boolr� r� r� r� r� r� r� r r r r �<module> sJ ��� Y E O 9 .