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nmap/zenmap/zenmapCore/Diff.py

252 lines
13 KiB
Python

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# ***********************IMPORTANT NMAP LICENSE TERMS************************
# * *
# * The Nmap Security Scanner is (C) 1996-2013 Insecure.Com LLC. Nmap is *
# * also a registered trademark of Insecure.Com LLC. This program is free *
# * software; you may redistribute and/or modify it under the terms of the *
# * GNU General Public License as published by the Free Software *
# * Foundation; Version 2 ("GPL"), BUT ONLY WITH ALL OF THE CLARIFICATIONS *
# * AND EXCEPTIONS DESCRIBED HEREIN. This guarantees your right to use, *
# * modify, and redistribute this software under certain conditions. If *
# * you wish to embed Nmap technology into proprietary software, we sell *
# * alternative licenses (contact sales@nmap.com). Dozens of software *
# * vendors already license Nmap technology such as host discovery, port *
# * scanning, OS detection, version detection, and the Nmap Scripting *
# * Engine. *
# * *
# * Note that the GPL places important restrictions on "derivative works", *
# * yet it does not provide a detailed definition of that term. To avoid *
# * misunderstandings, we interpret that term as broadly as copyright law *
# * allows. For example, we consider an application to constitute a *
# * derivative work for the purpose of this license if it does any of the *
# * following with any software or content covered by this license *
# * ("Covered Software"): *
# * *
# * o Integrates source code from Covered Software. *
# * *
# * o Reads or includes copyrighted data files, such as Nmap's nmap-os-db *
# * or nmap-service-probes. *
# * *
# * o Is designed specifically to execute Covered Software and parse the *
# * results (as opposed to typical shell or execution-menu apps, which will *
# * execute anything you tell them to). *
# * *
# * o Includes Covered Software in a proprietary executable installer. The *
# * installers produced by InstallShield are an example of this. Including *
# * Nmap with other software in compressed or archival form does not *
# * trigger this provision, provided appropriate open source decompression *
# * or de-archiving software is widely available for no charge. For the *
# * purposes of this license, an installer is considered to include Covered *
# * Software even if it actually retrieves a copy of Covered Software from *
# * another source during runtime (such as by downloading it from the *
# * Internet). *
# * *
# * o Links (statically or dynamically) to a library which does any of the *
# * above. *
# * *
# * o Executes a helper program, module, or script to do any of the above. *
# * *
# * This list is not exclusive, but is meant to clarify our interpretation *
# * of derived works with some common examples. Other people may interpret *
# * the plain GPL differently, so we consider this a special exception to *
# * the GPL that we apply to Covered Software. Works which meet any of *
# * these conditions must conform to all of the terms of this license, *
# * particularly including the GPL Section 3 requirements of providing *
# * source code and allowing free redistribution of the work as a whole. *
# * *
# * As another special exception to the GPL terms, Insecure.Com LLC grants *
# * permission to link the code of this program with any version of the *
# * OpenSSL library which is distributed under a license identical to that *
# * listed in the included docs/licenses/OpenSSL.txt file, and distribute *
# * linked combinations including the two. *
# * *
# * Any redistribution of Covered Software, including any derived works, *
# * must obey and carry forward all of the terms of this license, including *
# * obeying all GPL rules and restrictions. For example, source code of *
# * the whole work must be provided and free redistribution must be *
# * allowed. All GPL references to "this License", are to be treated as *
# * including the terms and conditions of this license text as well. *
# * *
# * Because this license imposes special exceptions to the GPL, Covered *
# * Work may not be combined (even as part of a larger work) with plain GPL *
# * software. The terms, conditions, and exceptions of this license must *
# * be included as well. This license is incompatible with some other open *
# * source licenses as well. In some cases we can relicense portions of *
# * Nmap or grant special permissions to use it in other open source *
# * software. Please contact fyodor@nmap.org with any such requests. *
# * Similarly, we don't incorporate incompatible open source software into *
# * Covered Software without special permission from the copyright holders. *
# * *
# * If you have any questions about the licensing restrictions on using *
# * Nmap in other works, are happy to help. As mentioned above, we also *
# * offer alternative license to integrate Nmap into proprietary *
# * applications and appliances. These contracts have been sold to dozens *
# * of software vendors, and generally include a perpetual license as well *
# * as providing for priority support and updates. They also fund the *
# * continued development of Nmap. Please email sales@nmap.com for further *
# * information. *
# * *
# * If you have received a written license agreement or contract for *
# * Covered Software stating terms other than these, you may choose to use *
# * and redistribute Covered Software under those terms instead of these. *
# * *
# * Source is provided to this software because we believe users have a *
# * right to know exactly what a program is going to do before they run it. *
# * This also allows you to audit the software for security holes. *
# * *
# * Source code also allows you to port Nmap to new platforms, fix bugs, *
# * and add new features. You are highly encouraged to send your changes *
# * to the dev@nmap.org mailing list for possible incorporation into the *
# * main distribution. By sending these changes to Fyodor or one of the *
# * Insecure.Org development mailing lists, or checking them into the Nmap *
# * source code repository, it is understood (unless you specify otherwise) *
# * that you are offering the Nmap Project (Insecure.Com LLC) the *
# * unlimited, non-exclusive right to reuse, modify, and relicense the *
# * code. Nmap will always be available Open Source, but this is important *
# * because the inability to relicense code has caused devastating problems *
# * for other Free Software projects (such as KDE and NASM). We also *
# * occasionally relicense the code to third parties as discussed above. *
# * If you wish to specify special license conditions of your *
# * contributions, just say so when you send them. *
# * *
# * This program is distributed in the hope that it will be useful, but *
# * WITHOUT ANY WARRANTY; without even the implied warranty of *
# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the Nmap *
# * license file for more details (it's in a COPYING file included with *
# * Nmap, and also available from https://svn.nmap.org/nmap/COPYING *
# * *
# ***************************************************************************/
import datetime
import os
import subprocess
import sys
import tempfile
# Prevent loading PyXML
import xml
xml.__path__ = [x for x in xml.__path__ if "_xmlplus" not in x]
import xml.sax
from zenmapCore.Name import APP_NAME
from zenmapCore.NmapParser import NmapParserSAX
from zenmapCore.UmitConf import PathsConfig
from zenmapCore.UmitLogging import log
import zenmapCore.Paths
# The [paths] configuration from zenmap.conf, used to get ndiff_command_path.
paths_config = PathsConfig()
class NdiffParseException(Exception):
pass
def get_path():
"""Return a value for the PATH environment variable that is appropriate
for the current platform. It will be the PATH from the environment plus
possibly some platform-specific directories."""
path_env = os.getenv("PATH")
if path_env is None:
search_paths = []
else:
search_paths = path_env.split(os.pathsep)
for path in zenmapCore.Paths.get_extra_executable_search_paths():
if path not in search_paths:
search_paths.append(path)
return os.pathsep.join(search_paths)
class NdiffCommand(subprocess.Popen):
def __init__(self, filename_a, filename_b, temporary_filenames=[]):
self.temporary_filenames = temporary_filenames
search_paths = get_path()
env = dict(os.environ)
env["PATH"] = search_paths
if getattr(sys, "frozen", None) == "macosx_app":
# These variables are set by py2app, but they can interfere with
# Ndiff because Ndiff is also a Python application. Without
# removing these, Ndiff will attempt to run using the
# py2app-bundled Python library, and may run into version or
# architecture mismatches.
if "PYTHONPATH" in env:
del env["PYTHONPATH"]
if "PYTHONHOME" in env:
del env["PYTHONHOME"]
command_list = [
paths_config.ndiff_command_path,
"--verbose",
"--",
filename_a,
filename_b
]
self.stdout_file = tempfile.TemporaryFile(
mode="rb",
prefix=APP_NAME + "-ndiff-",
suffix=".xml"
)
log.debug("Running command: %s" % repr(command_list))
# shell argument explained in zenmapCore.NmapCommand.py
subprocess.Popen.__init__(
self,
command_list,
stdout=self.stdout_file,
stderr=self.stdout_file,
env=env,
shell=(sys.platform == "win32")
)
def get_scan_diff(self):
self.wait()
self.stdout_file.seek(0)
return self.stdout_file.read()
def close(self):
"""Clean up temporary files."""
self.stdout_file.close()
for filename in self.temporary_filenames:
log.debug("Remove temporary diff file %s." % filename)
os.remove(filename)
self.temporary_filenames = []
def kill(self):
self.close()
def ndiff(scan_a, scan_b):
"""Run Ndiff on two scan results, which may be filenames or NmapParserSAX
objects, and return a running NdiffCommand object."""
temporary_filenames = []
if isinstance(scan_a, NmapParserSAX):
fd, filename_a = tempfile.mkstemp(
prefix=APP_NAME + "-diff-",
suffix=".xml"
)
temporary_filenames.append(filename_a)
f = os.fdopen(fd, "wb")
scan_a.write_xml(f)
f.close()
else:
filename_a = scan_a
if isinstance(scan_b, NmapParserSAX):
fd, filename_b = tempfile.mkstemp(
prefix=APP_NAME + "-diff-",
suffix=".xml"
)
temporary_filenames.append(filename_b)
f = os.fdopen(fd, "wb")
scan_b.write_xml(f)
f.close()
else:
filename_b = scan_b
return NdiffCommand(filename_a, filename_b, temporary_filenames)