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o o@�dGY � @ sn d dl Z d dlZd dlmZ d dlmZmZmZ d dlm Z d dlm Z m Z e � e�ZdZdZdZd ee� d ZG d d � d �ZG d d� d�Zdd� Zdd� Zdd� Zdd� Zdd� Zdd� Z efdd �Z d8d d �Z G d d � d �Z d!ee fd"d#�Z d!ee fd$d%�Z!d&d'� Z"d(ed!e#fd)d*�Z$d+d,� Z%efd-d.�Z&d/d0� Z'efd1eeeef fd2d3�Z(d4d5� Z)d6d7� Z*dS )9� N)�suppress)�List�Sequence�Tuple)�log)�subp�utilz/etc/ssh/sshd_config)�dsa�rsa�ecdsa�ed25519z(ecdsa-sha2-nistp256-cert-v01@openssh.comzecdsa-sha2-nistp256z(ecdsa-sha2-nistp384-cert-v01@openssh.comzecdsa-sha2-nistp384z(ecdsa-sha2-nistp521-cert-v01@openssh.comzecdsa-sha2-nistp521z+sk-ecdsa-sha2-nistp256-cert-v01@openssh.comz"sk-ecdsa-sha2-nistp256@openssh.comz#sk-ssh-ed25519-cert-v01@openssh.comzsk-ssh-ed25519@openssh.comz ssh-dss-cert-v01@openssh.comzssh-dssz ssh-ed25519-cert-v01@openssh.comz ssh-ed25519z ssh-rsa-cert-v01@openssh.comzssh-rsaz ssh-xmss-cert-v01@openssh.comzssh-xmss@openssh.com� z�no-port-forwarding,no-agent-forwarding,no-X11-forwarding,command="echo 'Please login as the user \"$USER\" rather than the user \"$DISABLE_USER\".';echo;sleep 10;exit �"c @ s( e Zd Z ddd�Zdd� Zdd� ZdS ) � AuthKeyLineNc C s" || _ || _|| _|| _|| _d S �N)�base64�comment�options�keytype�source)�selfr r r r r � r �4/usr/lib/python3/dist-packages/cloudinit/ssh_util.py�__init__H s zAuthKeyLine.__init__c C s | j o| jS r )r r �r r r r �validQ s zAuthKeyLine.validc C s` g }| j r |�| j � | jr|�| j� | jr |�| j� | jr&|�| j� |s+| jS d�|�S �N� )r �appendr r r r �join)r �toksr r r �__str__T s zAuthKeyLine.__str__)NNNN)�__name__� __module__� __qualname__r r r! r r r r r G s � r c @ s" e Zd ZdZdd� Zddd�ZdS )�AuthKeyLineParsera� AUTHORIZED_KEYS FILE FORMAT AuthorizedKeysFile specifies the file containing public keys for public key authentication; if none is specified, the default is ~/.ssh/authorized_keys. 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, id_dsa.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. Fr )r � � �\r N)�len�lstrip)r �ent�quoted�i�curc�nextcr �remainr r r �_extract_optionsx s" � z"AuthKeyLineParser._extract_optionsNc C s� |� d�}|�d�s|�� dkrt|�S dd� }|�� }z ||�\}}}W n/ tyT | �|�\} } |d u r9| }z || �\}}}W n tyQ t|� Y Y S w Y nw t|||||d�S )Nz �#� c S s^ | � d d�}t|�dk rtdt|� ��|d tvr"td|d ��t|�dkr-|�d� |S )N� zTo few fields: %sr zInvalid keytype %sr3 )�splitr) � TypeError�VALID_KEY_TYPESr )r+ r r r r � parse_ssh_key� s z.AuthKeyLineParser.parse.<locals>.parse_ssh_key)r r r r )�rstrip� startswith�stripr r6 r1 ) r �src_liner �liner8 r+ r r r �keyoptsr0 r r r �parse� s2 ��� �zAuthKeyLineParser.parser )r" r# r$ �__doc__r1 r? r r r r r% d s r% c C sx g }t � }g }| D ]0}z tj�|�r&t�|��� }|D ] }|�|�|�� qW q t t fy9 t� t d|� Y q w |S )NzError reading lines from %s) r% �os�path�isfiler � load_file� splitlinesr r? �IOError�OSError�logexc�LOG)�fnames�lines�parser�contents�fnamer= r r r �parse_authorized_keys� s ��rO c C s� t dd� |D ��}tdt| ��D ]%}| | }|�� sq|D ]}|j|jkr0|}||v r0|�|� q || |< q|D ]}| �|� q8dd� | D �}|�d� d�|�S )Nc S s g | ]}|� � r|�qS r )r ��.0�kr r r � <listcomp>� � z*update_authorized_keys.<locals>.<listcomp>r c S � g | ]}t |��qS r ��str)rQ �br r r rS � � r3 � )�list�ranger) r r �remover r )� old_entries�keys�to_addr- r+ rR �keyrK r r r �update_authorized_keys� s" � rb c C s4 t �| �}|r |jstd| ��tj�|jd�|fS )Nz"Unable to get SSH info for user %rz.ssh)�pwd�getpwnam�pw_dir� RuntimeErrorrA rB r )�username�pw_entr r r �users_ssh_info� s ri c C sp d|fd|fdf}| s d} | � � }g }|D ] }|D ] \}}|�||�}q|�d�s0tj�||�}|�|� q|S )N�%h�%u)z%%�%�%h/.ssh/authorized_keys�/)r5 �replacer: rA rB r r ) �value�homedirrg �macros�paths�renderedrB �macro�fieldr r r � render_authorizedkeysfile_paths� s rw c C s� d}|rd}t �|�}|r || kr |dkr t�d||| |� dS t �|�}|| kr.|dM }nt �|�}t �| �} || v rA|dM }n|dM }||@ d krUt�d ||| � dS |rf|d @ d krft�d ||� dS d S )aV Check if the file/folder in @current_path has the right permissions. 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_ownerrI �debug�get_permissions� get_group�get_user_groups) rg � 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' rx rn ���r3 z-Invalid directory. Symlink exists in path: %sFz*Invalid directory. File exists in path: %s�� ry T)�mode�exist_okz%s is not a file!� )r� �ensure_dir_exists)ri r5 rA rB �dirnamere �islinkrI r~ rC r: �existsr � SeLinuxGuard�pw_uid�pw_gid�makedirs� chownbyidr� �isdir� write_filerF rG rH rW )rg �filenamer� � user_pwent� root_pwent� directories� parent_folder� home_folder� directoryr� �uid�gid� permissions�er r r �check_create_pathJ 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 ]$\} } td | v d | v | �d �|j ��g�r�t| | | dk�} | r�| } nqb||kr�t �d |� |t|g�fS )N�authorized_keysT�� recursive�authorizedkeysfilerm r� �yesr zhFailed extracting 'AuthorizedKeysFile' in SSH config from %r, using 'AuthorizedKeysFile' file %r insteadrk rj z{}/zAAuthorizedKeysFile has an user-specific authorized_keys, using %s)ri rA rB r r r� �parse_ssh_config_map�getrw re rF rG rH rI � DEF_SSHD_CFG�zipr5 �anyr: �formatr� r~ rO ) rg � sshd_cfg_file�ssh_dirrh �default_authorizedkeys_file�user_authorizedkeys_file� auth_key_fns�ssh_cfg� key_pathsr� �key_path� auth_key_fn�permissions_okr r r �extract_authorized_keys� s^ � ���� ��� ����r� c C s� t � }g }| D ]}|�|jt|�|d�� qt|�\}}tj�|�}tj |dd�� t ||�} tj || dd� W d � d S 1 sBw Y d S )N)r Tr� �� preserve_mode) r% r r? rW r� rA rB r� r r� rb r� ) r_ rg r rL � key_entriesrR r� �auth_key_entriesr� �contentr r r �setup_user_keys� s "�r� c @ s* e Zd Zddd�Zedd� �Zdd� ZdS ) �SshdConfigLineNc C s || _ || _|| _d S r )r= �_keyrp )r r= rR �vr r r r � s zSshdConfigLine.__init__c C s | j d u rd S | j �� S r )r� �lowerr r r r ra � s zSshdConfigLine.keyc C s: | j d u r t| j�S t| j �}| jr|dt| j� 7 }|S r )r� rW r= rp )r r� r r r r! � s zSshdConfigLine.__str__)NN)r" r# r$ r �propertyra r! r r r r r� � s r� �returnc C s" t j�| �sg S tt�| ��� �S r )rA rB rC �parse_ssh_config_linesr rD rE �rN 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 )Nr2 r' �=z;sshd_config: option "%s" has no key/value pair, skipping it)r; r: r r� r5 � ValueErrorrI r~ )rK �retr= ra �valr r r r� � s, ���� r� c C s6 t | �}|si S i }|D ] }|jsq |j||j< q |S r )r� ra rp )rN rK r� r= r r r r� s r� rN 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)rA rB rC �openr: )rN �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� rA rB r� r � ensure_dirr rC � 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.)rK �updatesrZ c S rU r rV )rQ r= r r r rS E rY z%update_ssh_config.<locals>.<listcomp>Tr� r )r� r� �update_ssh_config_linesr r� r r) )r� rN rK �changedr r r �update_ssh_config: 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� rP r r r rS U rT z+update_ssh_config_lines.<locals>.<listcomp>r' )�startz$line %d: option %s already set to %sz#line %d: option %s updated %s -> %sr3 z line %d: option %s added with %s) �set�dictr_ � enumeratera �addrp rI r~ r r) �itemsr� ) rK r� �foundr� �casemapr- r= ra rp r r r r� K sD � �� �r� rK c C s> | sd S t |�}dd� | D �}tj|d�|�d ddd� d S )Nc s s" � | ] \}}|� d |� �V qdS )r Nr )rQ rR r� r r r � <genexpr>} s � z$append_ssh_config.<locals>.<genexpr>rZ �abT)�omoder� )r� r r� r )rK rN r� r r r �append_ssh_configy 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. r3 �sshdz-Vr r' )�rcsN�OpenSSH_rZ �,)r r �ProcessExecutionErrorr5 r: 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 dameon 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� r6 rI �warning)�upstream_version� full_versionr r r � get_opensshd_upstream_version� s �r� r )+rA rc � contextlibr �typingr r r � cloudinitr �loggingr r � getLoggerr" rI r� r7 �_DISABLE_USER_SSH_EXITrW �DISABLE_USER_OPTSr r% rO rb ri rw 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 .
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