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ed dfd%d&�Z deded dfd'd(�Z!d ed efd)d*�Z"d+ed efd,d-�Z#d.ed efd/d0�Z$d.ed efd1d2�Z%d3ed4ed efd5d6�Z&d7ed8ed efd9d:�Z'd.ed;ed efd<d=�Z(d>d?� Z)d@dA� Z*dTdBdC�Z+dDdE� Z,dFdG� Z-dHdI� Z.dJdK� Z/dLdM� Z0dNdO� Z1dPdQ� Z2dS )Uz;Compat module to handle files security on Windows and Linux� )�absolute_importN)�ListTFc @ s e Zd ZdZdd� ZdS )�
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d| _ d S )N� )�mask)�self� r �;/usr/lib/python3/dist-packages/certbot/compat/filesystem.py�__init__ s
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Apply a POSIX mode on given file_path:
- for Linux, the POSIX mode will be directly applied using chmod,
- for Windows, the POSIX mode will be translated into a Windows DACL that make sense for
Certbot context, and applied to the file using kernel calls.
The definition of the Windows DACL that correspond to a POSIX mode, in the context of Certbot,
is explained at https://github.com/certbot/certbot/issues/6356 and is implemented by the
method `_generate_windows_flags()`.
:param str file_path: Path of the file
:param int mode: POSIX mode to apply
N)�
POSIX_MODE�os�chmod�_apply_win_mode�r r r r r r & s r r c C s t rt�| �S tj}| t_|S )a$
Set the current numeric umask and return the previous umask. On Linux, the built-in umask
method is used. On Windows, our Certbot-side implementation is used.
:param int mask: The user file-creation mode mask to apply.
:rtype: int
:return: The previous umask value.
)r r �umask�_WINDOWS_UMASKr )r �previous_umaskr r r r ; s
r �src�dst� copy_user�
copy_groupc C sV t r t�| �}|r |jnd}|r|jnd}t�|||� n|r$t| |� t||� dS )a�
Copy ownership (user and optionally group on Linux) from the source to the
destination, then apply given mode in compatible way for Linux and Windows.
This replaces the os.chown command.
:param str src: Path of the source file
:param str dst: Path of the destination file
:param int mode: Permission mode to apply on the destination file
:param bool copy_user: Copy user if `True`
:param bool copy_group: Copy group if `True` on Linux (has no effect on Windows)
���N)r r �stat�st_uid�st_gid�chown�_copy_win_ownershipr )r r r r r �stats�user_id�group_idr r r � copy_ownership_and_apply_modeU s
r' c C sd t r$t�| �}|r |jnd}|r|jnd}t�|||� t||j� dS |r+t| |� t | |� dS )aU
Copy ownership (user and optionally group on Linux) and mode/DACL
from the source to the destination.
:param str src: Path of the source file
:param str dst: Path of the destination file
:param bool copy_user: Copy user if `True`
:param bool copy_group: Copy group if `True` on Linux (has no effect on Windows)
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r r r r r! r" r �st_moder# �_copy_win_mode)r r r r r$ r% r& r r r �copy_ownership_and_modev s
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Check if the given mode matches the permissions of the given file.
On Linux, will make a direct comparison, on Windows, mode will be compared against
the security model.
:param str file_path: Path of the file
:param int mode: POSIX mode to test
:rtype: bool
:return: True if the POSIX mode matches the file permissions
)r r �S_IMODEr r( �_check_win_moder r r r �
check_mode� s
r- c C s8 t r t�| �jt�� kS t�| tj�}|�� }t � |kS )z�
Check if given file is owned by current user.
:param str file_path: File path to check
:rtype: bool
:return: True if given file is owned by current user, False otherwise.
)
r r r r �getuid�
win32security�GetFileSecurity�OWNER_SECURITY_INFORMATION�GetSecurityDescriptorOwner�_get_current_user)r �security�userr r r � check_owner� s
r6 c C s t | �ot| |�S )z�
Check if given file has the given mode and is owned by current user.
:param str file_path: File path to check
:param int mode: POSIX mode to check
:rtype: bool
:return: True if file has correct mode and owner, False otherwise.
)r6 r- r r r r �check_permissions� s r7 � �flagsc
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}t � }t ||t
j�}|�|d� |�d|d� d}zDzt�| tjtjtj@ ||dd�}W n) tjyu } z | jtjkrbttj | j ��| jtj krottj | j ��| �d} ~ ww W |r}|� � n|r�|� � w w t�| |tjA tjA �S t�| |�}t!| |� |S )aw
Wrapper of original os.open function, that will ensure on Windows that given mode
is correctly applied.
:param str file_path: The file path to open
:param int flags: Flags to apply on file while opened
:param int mode: POSIX mode to apply on file when opened,
Python defaults will be applied if ``None``
:returns: the file descriptor to the opened file
:rtype: int
:raise: OSError(errno.EEXIST) if the file already exists and os.O_CREAT & os.O_EXCL are set,
OSError(errno.EACCES) on Windows if the file already exists and is a directory, and
os.O_CREAT is set.
r � N)"r r �open�O_CREAT�O_EXCL�win32con�
CREATE_NEW�
CREATE_ALWAYSr/ �SECURITY_ATTRIBUTES�SECURITY_DESCRIPTORr3 �_generate_daclr r �SetSecurityDescriptorOwner�SetSecurityDescriptorDacl� win32file�
CreateFile� GENERIC_READ�FILE_SHARE_READ�FILE_SHARE_WRITE�
pywintypes�error�winerror�ERROR_FILE_EXISTS�OSError�errno�EEXIST�strerror�ERROR_SHARING_VIOLATION�EACCES�Closer )
r r9 r � disposition�
attributesr4 r5 �dacl�handle�errr r r r; � sF
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r; c C sr t d�}z/t |d|A B � trt�| |�W t |� S tj}ztt_t�| |�W |t_W t |� S |t_w t |� w )a4
Rewrite of original os.makedirs function, that will ensure on Windows that given mode
is correctly applied.
:param str file_path: The file path to open
:param int mode: POSIX mode to apply on leaf directory when created, Python defaults
will be applied if ``None``
r r8 )r r r �makedirs�mkdir)r r �
current_umask�
orig_mkdir_fnr r r r[ s
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Rewrite of original os.mkdir function, that will ensure on Windows that given mode
is correctly applied.
:param str file_path: The file path to open
:param int mode: POSIX mode to apply on directory when created, Python defaults
will be applied if ``None``
Fr: r N)r r r\ r/ rA rB r3 rC r r rD rE rF �CreateDirectoryrK rL rM �ERROR_ALREADY_EXISTSrO rP rQ rR )r r rW r4 r5 rX rZ r r r r\ $ s" � ��r\ c C s. t td�rttd�| |� dS t�| |� dS )z�
Rename a file to a destination path and handles situations where the destination exists.
:param str src: The current file path.
:param str dst: The new file path.
�replaceN)�hasattrr �getattr�rename)r r r r r ra C s
ra c C s� | }t s tjdkr tj�| �}tj�|�r td�|���|S g }tj�| �rT| }t� | �} tj�
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Find the real path for the given path. This method resolves symlinks, including
recursive symlinks, and is protected against symlinks that creates an infinite loop.
:param str file_path: The path to resolve
:returns: The real path for the given path
:rtype: str
)� � zError, link {0} is a loop!)r �sys� version_infor �path�realpath�islink� RuntimeError�format�readlink�isabs�join�dirname�append�abspath)r �
original_pathri �inspected_paths� link_pathr r r rj T s"
� rj rv c C s< t �| �}ts |�d�s|S t|�dk r|dd� S td��)a
Return a string representing the path to which the symbolic link points.
:param str link_path: The symlink path to resolve
:return: The path the symlink points to
:returns: str
:raise: ValueError if a long path (260> characters) is encountered on Windows
z\\?\i � Nz3Long paths are not supported by Certbot on Windows.)r rn r �
startswith�len�
ValueError)rv ri r r r rn v s
rn ri c C s& t rtj�| �ot�| tj�S t| �S )z�
Is path an executable file?
:param str path: path to test
:return: True if path is an executable file
:rtype: bool
)r r ri �isfile�access�X_OK�_win_is_executable)ri r r r �
is_executable� s r c C sV t rtt�t�| �j�tj@ �S t�| tj �}|�
� }t|� tj tj
t�d�d���S )z�
Check if everybody/world has any right (read/write/execute) on a file given its path.
:param str path: path to test
:return: True if everybody/world has any right to the file
:rtype: bool
�S-1-1-0�� TrusteeForm� TrusteeType�
Identifier)r �boolr r+ r r( �S_IRWXOr/ r0 �DACL_SECURITY_INFORMATION�GetSecurityDescriptorDacl�GetEffectiveRightsFromAcl�TRUSTEE_IS_SID�TRUSTEE_IS_USER�ConvertStringSidToSid)ri r4 rX r r r �has_world_permissions� s
�r� �old_key� base_modec C s: t rt�t�| �j�tjtjB tjB tjB @ }||B S |S )a
Calculate the POSIX mode to apply to a private key given the previous private key.
:param str old_key: path to the previous private key
:param int base_mode: the minimum modes to apply to a private key
:return: the POSIX mode to apply
:rtype: int
) r r r+ r r( �S_IRGRP�S_IWGRP�S_IXGRP�S_IROTH)r� r� �old_moder r r �compute_private_key_mode� s �r� �path1�path2c C sd t rt�| �}t�|�}|j|jf|j|jfkS t�| tj�}|�� }t�|tj�}|�� }||kS )as
Return True if the ownership of two files given their respective path is the same.
On Windows, ownership is checked against owner only, since files do not have a group owner.
:param str path1: path to the first file
:param str path2: path to the second file
:return: True if both files have the same ownership, False otherwise
:rtype: bool
) r r r r r! r/ r0 r1 r2 )r� r� �stats1�stats2� security1�user1� security2�user2r r r �has_same_ownership� s
r� �min_modec C s� t rt�| �j}|||B kS t| �} t�| tjtjB �}|� � }|�
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Check if a file given its path has at least the permissions defined by the given minimal mode.
On Windows, group permissions are ignored since files do not have a group owner.
:param str path: path to the file to check
:param int min_mode: the minimal permissions expected
:return: True if the file matches the minimal permissions expectations, False otherwise
:rtype: bool
r: � r� FT)r r r r( rj r/ r0 r1 r� r2 r� rC �range� GetAceCount�GetAcer� r� r� ) ri r� r( r4 r5 rX �min_dacl�index�min_acer �effective_maskr r r �has_min_permissions� s.
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� �r� c C sN t j�| �sdS t�| tj�}|�� }|�tjtj t
� d��}|t j @ t j kS )NFr� )
r ri r{ r/ r0 r� r� r� r� r� r3 �
ntsecuritycon�FILE_GENERIC_EXECUTE)ri r4 rX r r r r r~ s �r~ c C sJ t | �} t�| tj�}|�� }t||�}|�d|d� t�| tj|� dS )z�
This function converts the given POSIX mode into a Windows ACL list, and applies it to the
file given its path. If the given path is a symbolic link, it will resolved to apply the
mode on the targeted file.
r: r N) rj r/ r0 r1 r2 rC rE �SetFileSecurityr� )r r r4 r5 rX r r r r & s
r c C s� |r|d| @ }t |�}t�d�}t�d�}t�d�}t�� }| ||fvr5t|d �}|r5|�tj|| � t|d �} | rE|�tj| |� tdddd��}
|�tj|
|� |�tj|
|� |S ) Nr8 zS-1-5-18z S-1-5-32-544r� r5 �allT��read�write�execute)�
_analyze_moder/ r� �ACL�_generate_windows_flags�AddAccessAllowedAce� ACL_REVISION) �user_sidr r �analysis�system�admins�everyonerX �
user_flags�everybody_flags�full_permissionsr r r rC 9 s$
rC c C s> | t j@ | t j@ | t j@ d�| t j@ | t j@ | t j@ d�d�S )Nr� )r5 r� )r �S_IRUSR�S_IWUSR�S_IXUSRr� �S_IWOTH�S_IXOTH)r r r r r� ] s ���r� c C sL t | �} t�| tj�}|�� }t�|tj�}|�|d� t�|tj|� d S �NF)rj r/ r0 r1 r2 rD r� )r r � security_src�user_src� security_dstr r r r# l s r# c C sN t | �} t�| tj�}|�� }t�|tj�}|�d|d� t�|tj|� d S )Nr: r )rj r/ r0 r� r� rE r� )r r r� rX r� r r r r) { s r) c C sJ d}| d r |t jB }| d r|t jt jA t jA B }| d r#|t jB }|S )Nr r� r� r� )r� �FILE_GENERIC_READ�FILE_ALL_ACCESSr� )� rights_desc�flagr r r r� � s
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r� c C sH t | �} t�| tjtjB �}|�� }|�� }|sdS t||�}t||�S r� ) rj r/ r0 r1 r� r� r2 rC �_compare_dacls)r r r4 rX r5 �ref_daclr r r r, � s
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r, c s4 � fdd�t � �� �D ��fdd�t ��� �D �kS )z�
This method compare the two given DACLs to check if they are identical.
Identical means here that they contains the same set of ACEs in the same order.
c � g | ]}� � |��qS r �r� ��.0r� )�dacl1r r �
<listcomp>� � z"_compare_dacls.<locals>.<listcomp>c r� r r� r� )�dacl2r r r� � r� )r� r� �r� r� r r� r r� � s �r� c C s$ d� t�� t�� �} t�d| �d S )z=
Return the pySID corresponding to the current user.
z{0}\{1}Nr )rm �win32api�
GetDomainName� GetUserNamer/ �LookupAccountName)� account_namer r r r3 � s r3 )TT)r8 )N)3r �
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