OwlCyberSecurity - MANAGER
Edit File: macosx_libfile.cpython-38.pyc
U �-^R. � @ sH d Z ddlZddlZdZdZdZdZdZdZd Z d Z d Z d Z d ej fdejfdejfdej fdej fdej fdej fgZedej fg Zd ej fdej fgZdejfdejfdej fdej fdej fgZdejfdejfdejfdejfdej fdej fgZdej fdej fgZdej fdej fdejd fd ej fd ej fd ej fd ej fd!ejfd"ejfd#ej fdej fg Zdej fdej fdejd fd ejfd ejfd ejfd ejfd!ejfd"ejfd#ej fdej fg Zed$ej fd%ej fg Zed&ej fd'ej fd%ej fd(ej fg Zd)d*� Zd5d+d,�Z d-d.� Z d/d0� Z d6d1d2�Z d3d4� Z dS )7a This module contains function to analyse dynamic library headers to extract system information Currently only for MacOSX Library file on macosx system starts with Mach-O or Fat field. This can be distinguish by first 32 bites and it is called magic number. Proper value of magic number is with suffix _MAGIC. Suffix _CIGAM means reversed bytes order. Both fields can occur in two types: 32 and 64 bytes. FAT field inform that this library contains few version of library (typically for different types version). It contains information where Mach-O headers starts. Each section started with Mach-O header contains one library (So if file starts with this field it contains only one version). After filed Mach-O there are section fields. Each of them starts with two fields: cmd - magic number for this command cmdsize - total size occupied by this section information. In this case only sections LC_VERSION_MIN_MACOSX (for macosx 10.13 and earlier) and LC_BUILD_VERSION (for macosx 10.14 and newer) are interesting, because them contains information about minimal system version. Important remarks: - For fat files this implementation looks for maximum number version. It not check if it is 32 or 64 and do not compare it with currently builded package. So it is possible to false report higher version that needed. - All structures signatures are taken form macosx header files. - I think that binary format will be more stable than `otool` output. and if apple introduce some changes both implementation will need to be updated. � Nl �:� l �~u} l �:� l �~u l �z�} l �m� l �z�} l �m� �$ �2 �magicZcputypeZ cpusubtypeZfiletype�ncmdsZ sizeofcmds�flagsZreserved� nfat_arch�offset�sizeZalign�cmd�cmdsizeZsegname� ZvmaddrZvmsizeZfileoffZfilesizeZmaxprotZinitprotZnsects�versionZsdk�platform�minosZntoolsc C s0 | d> d@ | d> d@ B | d? d@ B | d? d@ B S )N� l ~ � i � � � � � )�xr r �6/usr/lib/python3/dist-packages/wheel/macosx_libfile.py�swap32� s � � �r c C s� |d kr| � � }n | �|� tj�| �t�tj���j}|tt t t fkrjt j dkrZtj}ntj}t|�}ntj}| �|� ||fS )N�little)�tell�seek�ctypes�c_uint32�from_buffer_copy�read�sizeof�value� FAT_CIGAM� FAT_CIGAM_64�MH_CIGAM� MH_CIGAM_64�sys� byteorderZBigEndianStructureZLittleEndianStructurer Z Structure)�lib_filer � magic_number� BaseClassr r r � get_base_class_and_magic_number� s � r* c C s | � |�t�| ���S )N)r r r r )Z struct_classr' r r r � read_data� s �r+ c sh t | d���R�t�d�\}}|ttttfkr:W 5 Q R � d S |ttfk�r G dd� d|�}t|��}|tkr|G dd� d|�� nG dd� d|�� � �fdd �t|j �D �}g }|D ]<}z"t �|j �}|d k r�|� |� W q� t k r� Y q�X q�t|�dk�rt|�W 5 Q R � S W 5 Q R � d S n<zt �d�W W 5 Q R � S t k �rX Y W 5 Q R � d S X W 5 Q R X d S ) N�rbr c @ s e Zd ZeZdS )z4extract_macosx_min_system_version.<locals>.FatHeaderN)�__name__� __module__� __qualname__�fat_header_fields�_fields_r r r r � FatHeader� s r2 c @ s e Zd ZeZdS �z2extract_macosx_min_system_version.<locals>.FatArchN)r- r. r/ �fat_arch_fieldsr1 r r r r �FatArch s r5 c @ s e Zd ZeZdS r3 )r- r. r/ �fat_arch_64_fieldsr1 r r r r r5 s c s g | ]}t � ���qS r )r+ )�.0�_�r5 r' r r � <listcomp> s z5extract_macosx_min_system_version.<locals>.<listcomp>)�openr* � FAT_MAGIC� FAT_MAGIC_64�MH_MAGIC� MH_MAGIC_64r" r+ �ranger �read_mach_headerr �append� ValueError�len�max) Z path_to_libr) r( r2 Z fat_headerZ fat_arch_listZ versions_listZelr r r9 r �!extract_macosx_min_system_version� s4 rF c C s |dk r| � |� t| �\}}|tkr*dnd}G dd� d|�}|dkrXG dd� d|�}nG dd� d|�}t|| �}t|j�D ]�}| �� } t|| �} | � | � | jtkr�G d d � d |�} t| | �} t | j � S | jt k�rG d d � d |�} t| | �} t | j � S | � | | j � q|q|dS ) z� This funcition parse mach-O header and extract information about minimal system version :param lib_file: reference to opened library file with pointer NZ32Z64c @ s e Zd ZeZdS )z%read_mach_header.<locals>.SegmentBaseN)r- r. r/ �segment_base_fieldsr1 r r r r � SegmentBase. s rH c @ s e Zd ZeZdS �z$read_mach_header.<locals>.MachHeaderN)r- r. r/ �mach_header_fieldsr1 r r r r � MachHeader3 s rK c @ s e Zd ZeZdS rI )r- r. r/ �mach_header_fields_64r1 r r r r rK 8 s c @ s e Zd ZeZdS )z+read_mach_header.<locals>.VersionMinCommandN)r- r. r/ �version_min_command_fieldsr1 r r r r �VersionMinCommandA s rN c @ s e Zd ZeZdS )z&read_mach_header.<locals>.VersionBuildN)r- r. r/ � build_version_command_fieldsr1 r r r r � VersionBuildG s rP )r r* r> r+ r@ r r r �LC_VERSION_MIN_MACOSX� parse_versionr �LC_BUILD_VERSIONr r )r' r Z base_classr( ZarchrH rK Z mach_headerZ_i�posZ segment_baserN � version_inforP r r r rA " s. rA c C s* | d@ d? }| d@ d? }| d@ }|||fS )Nl � r r r r r )r r �y�zr r r rR Q s rR )N)N)!�__doc__r r% r< r! r= r" r> r# r? r$ rQ rS r Zc_intrJ rL r0 r4 Zc_uint64r6 rG Zc_charZsegment_command_fieldsZsegment_command_fields_64rM rO r r* r+ rF rA rR r r r r �<module> s� % � � � � �� �� , /