mirror of
https://github.com/panda3d/panda3d.git
synced 2025-10-02 18:03:56 -04:00
extend pmerge.py to validate and/or correct hashes
This commit is contained in:
David Rose
parent
a0b8d403de
commit
ea1d78b85e
@ -1,4 +1,5 @@
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import os
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import time
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from pandac.PandaModules import Filename, HashVal, VirtualFileSystem
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class FileSpec:
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@ -88,13 +89,18 @@ class FileSpec:
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xelement.SetAttribute('hash', self.hash)
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def quickVerify(self, packageDir = None, pathname = None,
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notify = None):
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notify = None, correctSelf = False):
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""" Performs a quick test to ensure the file has not been
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modified. This test is vulnerable to people maliciously
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attempting to fool the program (by setting datestamps etc.).
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Returns true if it is intact, false if it needs to be
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redownloaded. """
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if correctSelf is True, then any discrepency is corrected by
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updating the appropriate fields internally, making the
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assumption that the file on disk is the authoritative version.
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Returns true if it is intact, false if it is incorrect. If
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correctSelf is true, raises OSError if the self-update is
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impossible (for instance, because the file does not exist)."""
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if not pathname:
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pathname = Filename(packageDir, self.filename)
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@ -104,12 +110,16 @@ class FileSpec:
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# If the file is missing, the file fails.
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if notify:
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notify.debug("file not found: %s" % (pathname))
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if correctSelf:
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raise
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return False
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if st.st_size != self.size:
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# If the size is wrong, the file fails.
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if notify:
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notify.debug("size wrong: %s" % (pathname))
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if correctSelf:
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self.__correctHash(packageDir, pathname, st, notify)
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return False
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if st.st_mtime == self.timestamp:
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@ -129,6 +139,8 @@ class FileSpec:
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if notify:
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notify.debug("hash check wrong: %s" % (pathname))
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notify.debug(" found %s, expected %s" % (self.actualFile.hash, self.hash))
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if correctSelf:
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self.__correctHash(packageDir, pathname, st, notify)
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return False
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if notify:
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@ -137,7 +149,12 @@ class FileSpec:
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# The hash is OK after all. Change the file's timestamp back
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# to what we expect it to be, so we can quick-verify it
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# successfully next time.
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self.__updateTimestamp(pathname, st)
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if correctSelf:
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# Or update our own timestamp.
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self.__correctTimestamp(pathname, st, notify)
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return False
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else:
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self.__updateTimestamp(pathname, st)
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return True
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@ -194,6 +211,14 @@ class FileSpec:
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except OSError:
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pass
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def __correctTimestamp(self, pathname, st, notify):
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""" Corrects the internal timestamp to match the one on
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disk. """
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if notify:
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notify.info("Correcting timestamp of %s to %d (%s)" % (
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self.filename, st.st_mtime, time.asctime(time.localtime(st.st_mtime))))
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self.timestamp = st.st_mtime
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def checkHash(self, packageDir, pathname, st):
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""" Returns true if the file has the expected md5 hash, false
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otherwise. As a side effect, stores a FileSpec corresponding
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@ -205,4 +230,15 @@ class FileSpec:
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self.actualFile = fileSpec
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return (fileSpec.hash == self.hash)
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def __correctHash(self, packageDir, pathname, st, notify):
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""" Corrects the internal hash to match the one on disk. """
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if not self.actualFile:
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self.checkHash(packageDir, pathname, st)
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if notify:
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notify.info("Correcting hash %s to %s" % (
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self.filename, self.actualFile.hash))
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self.hash = self.actualFile.hash
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self.size = self.actualFile.size
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self.timestamp = self.actualFile.timestamp
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@ -1,5 +1,6 @@
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from direct.p3d.FileSpec import FileSpec
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from direct.p3d.SeqValue import SeqValue
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from direct.directnotify.DirectNotifyGlobal import *
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from pandac.PandaModules import *
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import copy
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import shutil
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@ -15,6 +16,8 @@ class PackageMerger:
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hosts are in sync, so that the file across all builds with the
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most recent timestamp (indicated in the contents.xml file) is
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always the most current version of the file. """
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notify = directNotify.newCategory("PackageMerger")
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class PackageEntry:
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""" This corresponds to a <package> entry in the contents.xml
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@ -42,6 +45,10 @@ class PackageMerger:
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self.descFile = FileSpec()
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self.descFile.loadXml(xpackage)
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self.validatePackageContents()
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self.descFile.quickVerify(packageDir = self.sourceDir, notify = PackageMerger.notify, correctSelf = True)
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self.packageSeq = SeqValue()
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self.packageSeq.loadXml(xpackage, 'seq')
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self.packageSetVer = SeqValue()
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@ -52,6 +59,7 @@ class PackageMerger:
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if ximport:
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self.importDescFile = FileSpec()
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self.importDescFile.loadXml(ximport)
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self.importDescFile.quickVerify(packageDir = self.sourceDir, notify = PackageMerger.notify, correctSelf = True)
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def makeXml(self):
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""" Returns a new TiXmlElement. """
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@ -75,6 +83,50 @@ class PackageMerger:
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return xpackage
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def validatePackageContents(self):
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""" Validates the contents of the package directory itself
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against the expected hashes and timestamps. Updates
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hashes and timestamps where needed. """
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if self.solo:
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return
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needsChange = False
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packageDescFullpath = Filename(self.sourceDir, self.descFile.filename)
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packageDir = Filename(packageDescFullpath.getDirname())
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doc = TiXmlDocument(packageDescFullpath.toOsSpecific())
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if not doc.LoadFile():
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message = "Could not read XML file: %s" % (self.descFile.filename)
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raise OSError, message
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xpackage = doc.FirstChildElement('package')
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if not xpackage:
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message = "No package definition: %s" % (self.descFile.filename)
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raise OSError, message
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xcompressed = xpackage.FirstChildElement('compressed_archive')
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if xcompressed:
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spec = FileSpec()
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spec.loadXml(xcompressed)
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if not spec.quickVerify(packageDir = packageDir, notify = PackageMerger.notify, correctSelf = True):
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spec.storeXml(xcompressed)
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needsChange = True
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xpatch = xpackage.FirstChildElement('patch')
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while xpatch:
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spec = FileSpec()
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spec.loadXml(xpatch)
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if not spec.quickVerify(packageDir = packageDir, notify = PackageMerger.notify, correctSelf = True):
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spec.storeXml(xpatch)
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needsChange = True
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xpatch = xpatch.NextSiblingElement('patch')
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if needsChange:
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PackageMerger.notify.info("Rewriting %s" % (self.descFile.filename))
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doc.SaveFile()
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self.descFile.quickVerify(packageDir = self.sourceDir, notify = PackageMerger.notify, correctSelf = True)
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# PackageMerger constructor
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def __init__(self, installDir):
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self.installDir = installDir
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@ -161,7 +213,7 @@ class PackageMerger:
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there. """
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dirname = Filename(pe.descFile.filename).getDirname()
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print "copying %s" % (dirname)
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self.notify.info("copying %s" % (dirname))
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sourceDirname = Filename(pe.sourceDir, dirname)
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targetDirname = Filename(self.installDir, dirname)
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@ -208,6 +260,13 @@ class PackageMerger:
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# Copying a regular file.
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sourceFilename.copyTo(targetFilename)
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# Also try to copy the timestamp, but don't fuss too much
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# if it doesn't work.
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try:
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st = os.stat(sourceFilename.toOsSpecific())
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os.utime(targetFilename.toOsSpecific(), (st.st_atime, st.st_mtime))
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except OSError:
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pass
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def merge(self, sourceDir):
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""" Adds the contents of the indicated source directory into
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@ -4,7 +4,9 @@ usageText = """
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This script can be used to merge together the contents of two or more
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separately-built stage directories, built independently via ppackage,
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or via Packager.py.
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or via Packager.py. This script also verifies the hash, file size,
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and timestamp values in the stage directory as it runs, so it can be
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run on a single standalone directory just to perform this validation.
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This script is actually a wrapper around Panda's PackageMerger.py.
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@ -24,7 +26,9 @@ Options:
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-i install_dir
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The full path to the final install directory. This may also
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contain some pre-existing contents; if so, it is merged with all
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of the input directories as well.
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of the input directories as well. The contents of this directory
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are checked for self-consistency with regards to hashes and
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timestamps.
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-h
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Display this help
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@ -62,9 +66,11 @@ inputDirs = []
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for arg in args:
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inputDirs.append(Filename.fromOsSpecific(arg))
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if not inputDirs:
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print "no input directories specified."
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sys.exit(1)
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# It's now legal to have no input files if you only want to verify
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# timestamps and hashes.
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## if not inputDirs:
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## print "no input directories specified."
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## sys.exit(1)
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try:
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pm = PackageMerger.PackageMerger(installDir)
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