def IOSCWStringsSub(data):
oCWStrings = naft_impf.cCiscoCWStrings(data)
if oCWStrings.error != '':
print(oCWStrings.error)
return
keys = oCWStrings.dCWStrings.keys()
keys.sort()
for key in keys:
if key == 'CW_SYSDESCR':
print('%s:' % key)
print(oCWStrings.dCWStrings[key])
else:
print('%s:%s%s' % (key, ' ' * (22 - len(key)), oCWStrings.dCWStrings[key]))
def IOSCWStringsSub(data):
oCWStrings = naft_impf.cCiscoCWStrings(data)
if oCWStrings.error != '':
print(oCWStrings.error)
return
keys = oCWStrings.dCWStrings.keys()
keys.sort()
for key in keys:
if key == 'CW_SYSDESCR':
print('%s:' % key)
print(oCWStrings.dCWStrings[key])
else:
print('%s:%s%s' % (key, ' ' *
(22 - len(key)), oCWStrings.dCWStrings[key]))
def IOSCWStringsSub(data):
returnString = ''
oCWStrings = naft_impf.cCiscoCWStrings(data)
if oCWStrings.error != '':
returnString += (oCWStrings.error)
return
keys = oCWStrings.dCWStrings.keys()
keys.sort()
for key in keys:
if key == 'CW_SYSDESCR':
returnString += ('%s:<br>' % key)
returnString += (oCWStrings.dCWStrings[key] + '<br>')
else:
returnString += ('%s:%s%s<br>' %
(key, ' ' *
(22 - len(key)), oCWStrings.dCWStrings[key]))
return returnString
def Parse(self):
self.error = 0
self.oELF = cELF(self.data)
if self.oELF.error != 0:
self.error = 1
print('ELF parsing error %d.' % self.oELF.error)
if self.oELF.error <= 2:
print('This is not an ELF file.')
elif self.oELF.error < 5:
print('This is probably not an ELF file/Cisco IOS image.')
return
self.oSectionHeaderCompressedImage, self.oSectionHeaderEmbeddedMD5, self.oSectionHeaderCWStrings = self.ExtractSections(
self.oELF)
if self.oSectionHeaderEmbeddedMD5 != None:
self.embeddedMD5 = self.ExtractEmbeddedMD5(
self.oSectionHeaderEmbeddedMD5.sectionData)
if self.oSectionHeaderCWStrings != None:
self.oCWStrings = naft_impf.cCiscoCWStrings(
self.oSectionHeaderCWStrings.sectionData)
md5 = hashlib.md5()
index = 0
for oSectionHeader in self.oELF.sections:
if index != 3 and index != 4:
md5.update(oSectionHeader.sectionData)
index += 1
self.calculatedMD5 = md5.hexdigest()
if self.oSectionHeaderCompressedImage == None:
print('MAGIC number FEEDFACE not found')
self.error = 4
return
self.sizeUncompressed, self.sizeCompressed, self.checksumCompressed, self.checksumUncompressed = struct.unpack(
'>IIII', self.oSectionHeaderCompressedImage.
sectionData[len(naft_impf.cCiscoMagic.STR_FEEDFACE
):len(naft_impf.cCiscoMagic.STR_FEEDFACE) + 4 * 4])
zipData = self.oSectionHeaderCompressedImage.sectionData[
len(naft_impf.cCiscoMagic.STR_FEEDFACE) +
4 * 4:len(naft_impf.cCiscoMagic.STR_FEEDFACE) + 4 * 4 +
self.sizeCompressed]
self.calculatedChecksumCompressed = cIOSImage.CalcChecksum(zipData)
try:
oZipFile = zipfile.ZipFile(cStringIO.StringIO(zipData))
try:
names = oZipFile.namelist()
except:
self.error = 6
print('Error retrieving ZIP namelist')
oZipFile = None
except:
self.error = 5
print('Error parsing ZIP section')
oZipFile = None
if oZipFile != None:
if len(names) == 0:
self.error = 7
print('Error: no file found in ZIP')
elif len(names) == 1:
self.imageUncompressedName = names[0]
else:
self.error = 8
print('More than one file found in ZIP')
print(','.join(names))
if self.imageUncompressedName != None:
try:
self.imageUncompressed = oZipFile.open(
self.imageUncompressedName).read()
except:
self.error = 9
print('Error decompressing ZIP section')
if self.imageUncompressed != None:
self.calculatedChecksumUncompressed = cIOSImage.CalcChecksum(
self.imageUncompressed)
def IOSCheckText(coredumpFilename, imageFilename, options):
oIOSCoreDump = naft_impf.cIOSCoreDump(coredumpFilename)
if oIOSCoreDump.error != '':
print(oIOSCoreDump.error)
return
else:
textAddress, textCoredump = oIOSCoreDump.RegionTEXT()
if textCoredump == None:
print('Error extracting text region from coredump %s' % coredumpFilename)
return
sysdescrCoredump = ''
dataAddress, dataCoredump = oIOSCoreDump.RegionDATA()
if dataCoredump != None:
oCWStrings = naft_impf.cCiscoCWStrings(dataCoredump)
if oCWStrings.error == '' and 'CW_SYSDESCR' in oCWStrings.dCWStrings:
sysdescrCoredump = oCWStrings.dCWStrings['CW_SYSDESCR']
image = naft_uf.File2Data(imageFilename)
if image == None:
print('Error reading image %s' % imageFilename)
return
oIOSImage = naft_iipf.cIOSImage(image)
if oIOSImage.error != 0:
return
sysdescrImage = ''
if oIOSImage.oCWStrings != None and oIOSImage.oCWStrings.error == '' and 'CW_SYSDESCR' in oIOSImage.oCWStrings.dCWStrings:
sysdescrImage = oIOSImage.oCWStrings.dCWStrings['CW_SYSDESCR']
if sysdescrCoredump != '' or sysdescrImage != '':
if sysdescrCoredump == sysdescrImage:
print('CW_SYSDESCR are identical:\n')
print(sysdescrCoredump)
elif sysdescrCoredump == sysdescrImage.replace('-MZ', '-M', 1):
print('CW_SYSDESCR are equivalent:\n')
print(sysdescrCoredump)
else:
print('CW_SYSDESCR are different:\n')
print(sysdescrCoredump)
print
print(sysdescrImage)
print
oELF = naft_iipf.cELF(oIOSImage.imageUncompressed)
if oELF.error != 0:
print('ELF parsing error %d.' % oELF.error)
return
countSectionExecutableInstructions = 0
for oSectionHeader in oELF.sections:
if oSectionHeader.flags & 4: # SHF_EXECINSTR executable instructions
textSectionData = oSectionHeader.sectionData
countSectionExecutableInstructions += 1
if countSectionExecutableInstructions != 1:
print('Error executable sections in image: found %d sections, expected 1' % countSectionExecutableInstructions)
return
start = textAddress & 0xFF # to be further researched
textImage = textSectionData[start:start + len(textCoredump)]
if len(textCoredump) != len(textImage):
print('the text region is longer than the text section')
countBytesDifferent = 0
shortestLength = min(len(textCoredump), len(textImage))
for iIter in range(shortestLength):
if textCoredump[iIter] != textImage[iIter]:
if countBytesDifferent == 0:
print('text region and section are different starting 0x%08X in coredump (iter = 0x%08X)' % ((textAddress + iIter), iIter))
countBytesDifferent += 1
if countBytesDifferent == 0:
print('text region and section are identical')
else:
print('number of different bytes: %d (%.2f%%)' % (countBytesDifferent, (countBytesDifferent * 100.0) / shortestLength))
def Parse(self):
self.error = 0
self.oELF = cELF(self.data)
if self.oELF.error != 0:
self.error = 1
print('ELF parsing error %d.' % self.oELF.error)
if self.oELF.error <= 2:
print('This is not an ELF file.')
elif self.oELF.error < 5:
print('This is probably not an ELF file/Cisco IOS image.')
return
self.oSectionHeaderCompressedImage, self.oSectionHeaderEmbeddedMD5, self.oSectionHeaderCWStrings = self.ExtractSections(self.oELF)
if self.oSectionHeaderEmbeddedMD5 != None:
self.embeddedMD5 = self.ExtractEmbeddedMD5(self.oSectionHeaderEmbeddedMD5.sectionData)
if self.oSectionHeaderCWStrings != None:
self.oCWStrings = naft_impf.cCiscoCWStrings(self.oSectionHeaderCWStrings.sectionData)
md5 = hashlib.md5()
index = 0
for oSectionHeader in self.oELF.sections:
if index != 3 and index != 4:
md5.update(oSectionHeader.sectionData)
index += 1
self.calculatedMD5 = md5.hexdigest()
if self.oSectionHeaderCompressedImage == None:
print('MAGIC number FEEDFACE not found')
self.error = 4
return
self.sizeUncompressed, self.sizeCompressed, self.checksumCompressed, self.checksumUncompressed = struct.unpack('>IIII', self.oSectionHeaderCompressedImage.sectionData[len(naft_impf.cCiscoMagic.STR_FEEDFACE):len(naft_impf.cCiscoMagic.STR_FEEDFACE) + 4*4])
zipData = self.oSectionHeaderCompressedImage.sectionData[len(naft_impf.cCiscoMagic.STR_FEEDFACE) + 4*4:len(naft_impf.cCiscoMagic.STR_FEEDFACE) + 4*4 + self.sizeCompressed]
self.calculatedChecksumCompressed = cIOSImage.CalcChecksum(zipData)
try:
oZipFile = zipfile.ZipFile(cStringIO.StringIO(zipData))
try:
names = oZipFile.namelist()
except:
self.error = 6
print('Error retrieving ZIP namelist')
oZipFile = None
except:
self.error = 5
print('Error parsing ZIP section')
oZipFile = None
if oZipFile != None:
if len(names) == 0:
self.error = 7
print('Error: no file found in ZIP')
elif len(names) == 1:
self.imageUncompressedName = names[0]
else:
self.error = 8
print('More than one file found in ZIP')
print(','.join(names))
if self.imageUncompressedName != None:
try:
self.imageUncompressed = oZipFile.open(self.imageUncompressedName).read()
except:
self.error = 9
print('Error decompressing ZIP section')
if self.imageUncompressed != None:
self.calculatedChecksumUncompressed = cIOSImage.CalcChecksum(self.imageUncompressed)
def IOSCheckText(coredumpFilename, imageFilename, options):
returnString = ''
oIOSCoreDump = naft_impf.cIOSCoreDump(coredumpFilename)
if oIOSCoreDump.error != '':
returnString += (oIOSCoreDump.error) + '<br>'
return returnString
else:
textAddress, textCoredump = oIOSCoreDump.RegionTEXT()
if textCoredump == None:
returnString += (
'Error extracting text region from coredump %s<br>' %
coredumpFilename)
return returnString
sysdescrCoredump = ''
dataAddress, dataCoredump = oIOSCoreDump.RegionDATA()
if dataCoredump != None:
oCWStrings = naft_impf.cCiscoCWStrings(dataCoredump)
if oCWStrings.error == '' and 'CW_SYSDESCR' in oCWStrings.dCWStrings:
sysdescrCoredump = oCWStrings.dCWStrings['CW_SYSDESCR']
image = naft_uf.File2Data(imageFilename)
if image == None:
returnString += ('Error reading image %s' % imageFilename)
return returnString
oIOSImage = naft_iipf.cIOSImage(image)
if oIOSImage.error != 0:
return
sysdescrImage = ''
if oIOSImage.oCWStrings != None and oIOSImage.oCWStrings.error == '' and 'CW_SYSDESCR' in oIOSImage.oCWStrings.dCWStrings:
sysdescrImage = oIOSImage.oCWStrings.dCWStrings['CW_SYSDESCR']
if sysdescrCoredump != '' or sysdescrImage != '':
if sysdescrCoredump == sysdescrImage:
returnString += ('CW_SYSDESCR are identical:<br>')
returnString += (sysdescrCoredump) + '<br>'
elif sysdescrCoredump == sysdescrImage.replace('-MZ', '-M', 1):
returnString += ('CW_SYSDESCR are equivalent:<br>')
returnString += (sysdescrCoredump) + '<br>'
else:
returnString += ('CW_SYSDESCR are different:<br>')
returnString += (sysdescrCoredump) + '<br>'
returnString += '<br>'
returnString += (sysdescrImage) + '<br>'
returnString += '<br>'
oELF = naft_iipf.cELF(oIOSImage.imageUncompressed)
if oELF.error != 0:
returnString += ('ELF parsing error %d.' % oELF.error)
return returnString
countSectionExecutableInstructions = 0
countSectionSRELOC = 0
for oSectionHeader in oELF.sections:
if oSectionHeader.flags & 4: # SHF_EXECINSTR executable instructions
textSectionData = oSectionHeader.sectionData
countSectionExecutableInstructions += 1
if oSectionHeader.nameIndexString == 'sreloc':
countSectionSRELOC += 1
if countSectionExecutableInstructions != 1:
returnString += (
'Error executable sections in image: found %d sections, expected 1'
% countSectionExecutableInstructions)
return returnString
if countSectionSRELOC != 0:
returnString += (
'Error found %d sreloc section in image: checktext command does not support relocation'
% countSectionSRELOC)
return returnString
start = textAddress & 0xFF # to be further researched
textImage = textSectionData[start:start + len(textCoredump)]
if len(textCoredump) != len(textImage):
returnString += ('the text region is longer than the text section<br>')
returnString += ('len(textCoredump) = %d<br>' % len(textCoredump))
returnString += ('len(textImage) = %d<br>' % len(textImage))
countBytesDifferent = 0
shortestLength = min(len(textCoredump), len(textImage))
for iIter in range(shortestLength):
if textCoredump[iIter] != textImage[iIter]:
if countBytesDifferent == 0:
returnString += (
'text region and section are different starting 0x%08X in coredump (iter = 0x%08X)<br>'
% ((textAddress + iIter), iIter))
countBytesDifferent += 1
if countBytesDifferent == 0:
returnString += ('text region and section are identical <br>')
else:
returnString += ('number of different bytes: %d (%.2f%%)<br>' %
(countBytesDifferent,
(countBytesDifferent * 100.0) / shortestLength))
return returnString
