From af36529554c39a2eefcc2c8723715e2d25b401b8 Mon Sep 17 00:00:00 2001
From: jvoisin
Date: Sun, 8 Jun 2014 13:39:18 +0200
Subject: Rename the MAT folder to libmat.

This commit fixes some issues for dump operating
systems who doesn't handle capitalization.
---
 libmat/mat.py | 186 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 186 insertions(+)
 create mode 100644 libmat/mat.py

(limited to 'libmat/mat.py')

diff --git a/libmat/mat.py b/libmat/mat.py
new file mode 100644
index 0000000..8dfc2dc
--- /dev/null
+++ b/libmat/mat.py
@@ -0,0 +1,186 @@
+#!/usr/bin/env python
+
+''' Metadata anonymisation toolkit library
+'''
+
+import logging
+import mimetypes
+import os
+import subprocess
+import xml.sax
+
+import hachoir_core.cmd_line
+import hachoir_parser
+
+import libmat.exceptions
+
+__version__ = '0.5.2'
+__author__ = 'jvoisin'
+
+#Silence
+LOGGING_LEVEL = logging.CRITICAL
+hachoir_core.config.quiet = True
+fname = ''
+
+#Verbose
+#LOGGING_LEVEL = logging.DEBUG
+#hachoir_core.config.quiet = False
+#logname = 'report.log'
+
+logging.basicConfig(filename=fname, level=LOGGING_LEVEL)
+
+import strippers  # this is loaded here because we need LOGGING_LEVEL
+
+
+def get_logo():
+    ''' Return the path to the logo
+    '''
+    if os.path.isfile('./data/mat.png'):
+        return './data/mat.png'
+    elif os.path.isfile('/usr/share/pixmaps/mat.png'):
+        return '/usr/share/pixmaps/mat.png'
+    elif os.path.isfile('/usr/local/share/pixmaps/mat.png'):
+        return '/usr/local/share/pixmaps/mat.png'
+
+
+def get_datadir():
+    ''' Return the path to the data directory
+    '''
+    if os.path.isdir('./data/'):
+        return './data/'
+    elif os.path.isdir('/usr/local/share/mat/'):
+        return '/usr/local/share/mat/'
+    elif os.path.isdir('/usr/share/mat/'):
+        return '/usr/share/mat/'
+
+
+def list_supported_formats():
+    ''' Return a list of all locally supported fileformat.
+        It parses that FORMATS file, and removes locally
+        non-supported formats.
+    '''
+    handler = XMLParser()
+    parser = xml.sax.make_parser()
+    parser.setContentHandler(handler)
+    path = os.path.join(get_datadir(), 'FORMATS')
+    with open(path, 'r') as xmlfile:
+        parser.parse(xmlfile)
+
+    localy_supported = []
+    for item in handler.list:
+        if item['mimetype'].split(',')[0] in strippers.STRIPPERS:
+            localy_supported.append(item)
+
+    return localy_supported
+
+
+class XMLParser(xml.sax.handler.ContentHandler):
+    ''' Parse the supported format xml, and return a corresponding
+        list of dict
+    '''
+    def __init__(self):
+        self.dict = {}
+        self.list = []
+        self.content, self.key = '', ''
+        self.between = False
+
+    def startElement(self, name, attrs):
+        ''' Called when entering into xml tag
+        '''
+        self.between = True
+        self.key = name
+        self.content = ''
+
+    def endElement(self, name):
+        ''' Called when exiting a xml tag
+        '''
+        if name == 'format':  # leaving a fileformat section
+            self.list.append(self.dict.copy())
+            self.dict.clear()
+        else:
+            content = self.content.replace('\s', ' ')
+            self.dict[self.key] = content
+            self.between = False
+
+    def characters(self, characters):
+        ''' Concatenate the content between opening and closing tags
+        '''
+        if self.between:
+            self.content += characters
+
+
+def secure_remove(filename):
+    ''' Securely remove the file
+    '''
+    # I want the file removed, even if it's ro
+    try:
+        os.chmod(filename, 220)
+    except OSError:
+        logging.error('Unable to add write rights to %s' % filename)
+        raise libmat.exceptions.UnableToWriteFile
+
+    try:
+        if not subprocess.call(['shred', '--remove', filename]):
+            return True
+        else:
+            raise OSError
+    except OSError:
+        logging.error('Unable to securely remove %s' % filename)
+
+    try:
+        os.remove(filename)
+    except OSError:
+        logging.error('Unable to remove %s' % filename)
+        raise libmat.exceptions.UnableToRemoveFile
+
+    return True
+
+
+def create_class_file(name, backup, **kwargs):
+    ''' Return a $FILETYPEStripper() class,
+        corresponding to the filetype of the given file
+    '''
+    if not os.path.isfile(name):  # check if the file exists
+        logging.error('%s is not a valid file' % name)
+        return None
+
+    if not os.access(name, os.R_OK):  # check read permissions
+        logging.error('%s is is not readable' % name)
+        return None
+
+    if not os.path.getsize(name):
+        #check if the file is not empty (hachoir crash on empty files)
+        logging.error('%s is empty' % name)
+        return None
+
+    filename = ''
+    try:
+        filename = hachoir_core.cmd_line.unicodeFilename(name)
+    except TypeError:  # get rid of "decoding Unicode is not supported"
+        filename = name
+
+    parser = hachoir_parser.createParser(filename)
+    if not parser:
+        logging.info('Unable to parse %s' % filename)
+        return None
+
+    mime = parser.mime_type
+
+    if mime == 'application/zip':  # some formats are zipped stuff
+        if mimetypes.guess_type(name)[0]:
+            mime = mimetypes.guess_type(name)[0]
+
+    if mime.startswith('application/vnd.oasis.opendocument'):
+        mime = 'application/opendocument'  # opendocument fileformat
+    elif mime.startswith('application/vnd.openxmlformats-officedocument'):
+        mime = 'application/officeopenxml'  # office openxml
+
+    is_writable = os.access(name, os.W_OK)
+
+    try:
+        stripper_class = strippers.STRIPPERS[mime]
+    except KeyError:
+        logging.info('Don\'t have stripper for %s format' % mime)
+        return None
+
+    return stripper_class(filename, parser, mime, backup, is_writable, **kwargs)
-- 
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