sisinfo.py

SeesInfo application for Symbian

"""
Copyright (c) 2006, Jari Sukanen
All rights reserved.

Redistribution and use in source and binary forms, with or 
without modification, are permitted provided that the following 
conditions are met:
	* Redistributions of source code must retain the above copyright 
	  notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright 
	  notice, this list of conditions and the following disclaimer in 
	  the documentation and/or other materials provided with the 
	  distribution.
    * Names of the contributors may not be used to endorse or promote 
	  products derived from this software without specific prior written 
	  permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 
THE POSSIBILITY OF SUCH DAMAGE.
"""

from sis import sisinfo, sisfields
import optparse
import sys, os

PyASN1Availabe = True

try :
    from pyasn1.codec.der import decoder
    from pyasn1.type import univ, base
except :
    PyASN1Availabe = False

def _findItem(item, itemParent, index, objectIdentifier) :
	if isinstance(item, base.AbstractSimpleAsn1Item) :
		if item == objectIdentifier :
			return itemParent[index+1]
	else :
		for i in range(len(item)) :
			found = _findItem(item[i], item, i, objectIdentifier)
			if found : 
				return found

def findItem(decodedCert, objectIdentifier) :
	return _findItem(decodedCert, None, 0, objectIdentifier)


class CertificateOrganization :
	def __init__(self) :
		pass
	
	def parse(self, decodedCert) :
		self.commonName = findItem(decodedCert, (2,5,4,3))
		self.countryCode = findItem(decodedCert, (2,5,4,6))
		self.locality = findItem(decodedCert, (2,5,4,7))
		self.state = findItem(decodedCert, (2,5,4,8))
		self.street = findItem(decodedCert, (2,5,4,9))
		self.organization = findItem(decodedCert, (2,5,4,10))

	def readableStr(self) :
		buf = ""
		if self.commonName :
			buf += self.commonName.prettyPrint() + "\n"
		if self.countryCode :
			buf += self.countryCode.prettyPrint() + "\n"
		if self.locality :
			buf += self.locality.prettyPrint() + "\n"
		if self.state :
			buf += self.state.prettyPrint() + "\n"
		if self.street :
			buf += self.street.prettyPrint() + "\n"
		if self.organization :
			buf += self.organization.prettyPrint()
		return buf
		
class CertificateInfo :
	def __init__(self) :
		pass
		
	def parse(self, decodedCert) :
		self.issuer = CertificateOrganization()
		self.issuer.parse(decodedCert[0][3])
		
		self.signer = CertificateOrganization()
		self.signer.parse(decodedCert[0][5])
		
	def readableStr(self) :
		buf = "Signer:\n      " + "\n      ".join(self.signer.readableStr().split('\n')) + "\n"
		buf += "Issuer:\n      " + "\n      ".join(self.issuer.readableStr().split('\n')) + "\n"
		return buf
			

class Handler :
    def __init__(self) :
		self.files = []
		self.fileDatas = []
		self.signatureCertificateChains = []
		
    def handleField(self, field, depth) :
		if field.type == sisfields.FileDescriptionField :
			self.files.append(field)
		elif field.type == sisfields.FileDataField :
			self.fileDatas.append(field)
		elif field.type == sisfields.SignatureCertificateChainField  :
			self.signatureCertificateChains.append(field)

    def execute(self, options) :
        for f in self.files :
			if options.info :
				buf = "   " + f.findField(sisfields.StringField)[0].readableStr()
				caps = f.findField(sisfields.CapabilitiesField)[0]
				if caps :
					buf += " [" + " ".join(f.findField(sisfields.CapabilitiesField)[0].readableCaps) + "]"
				print buf
			if options.extract :
				parts = f.findField(sisfields.StringField)[0].readableStr().split("\\")
				if len(parts[len(parts) - 1]) > 0 :
					path = os.path.abspath(options.extract)
					path += os.sep + os.sep.join(parts[1:-1])
					if not os.path.exists(path) :
						os.makedirs(path)
					newFile = file(path + os.sep + parts[len(parts) - 1], "wb")
					newFile.write(self.fileDatas[f.fileIndex].findField(sisfields.CompressedField)[0].data)
					newFile.close()
        for s in self.signatureCertificateChains :
            if options.certificate:
                buf = s.findField(sisfields.CertificateChainField)[0].subFields[0].data
                print "Certificate chain:"
                i = 1
                while len(buf) > 0 :
					print "   Certificate " + str(i) + ":"
					i += 1
					decoded = decoder.decode(buf)
					cer = CertificateInfo()
					cer.parse(decoded[0])
					readableStr = cer.readableStr()
					print "      " + "\n      ".join(readableStr.split('\n'))
					buf = decoded[1]
			
class ContentPrinter :
	def __init__(self) :
		pass
		
	def handleField(self, field, depth) :
		buf = ""
		for i in range(depth) :
			buf += "  "
		buf += sisfields.FieldNames[field.type] + " "
		if len(field.readableStr()) > 0 :
			buf += field.readableStr()
		print buf

OptionList = [
	optparse.make_option("-f", "--file", help="Name of the SIS file to inspect", metavar="FILENAME"),
	optparse.make_option("-i", "--info", help="Print information about SIS contents", action="store_true", default=False),
	optparse.make_option("-s", "--structure", help="Print SIS file structure", action="store_true", default=False),
	optparse.make_option("-e", "--extract", help="Extract the files from the SIS file to PATH", metavar="PATH"),
	optparse.make_option("-c", "--certificate", help="Print certificate information", action="store_true", default=False),
	]
	
def validateArguments(options, args) :
    result = True
    if not options.file :
		result = False
		raise Exception("Filename must be defined")
    if not (options.structure or options.extract or options.info or options.certificate) :
		result = False
		raise Exception("At least one of the switches: -s, -e, -i, or -c must be defined")
    if options.certificate and not PyASN1Availabe :
        raise Exception("PyASN1 not available, can't use -c switch. See http://pyasn1.sourceforge.net/")
    return result

import pdb
    
if __name__ == "__main__" :
	parser = optparse.OptionParser(option_list=OptionList, version="%prog v0.2")
	(options, args) = parser.parse_args(sys.argv)
	validArguments = False
	try :
		validArguments = validateArguments(options, args)
	except Exception, err:
		print "ERROR : " + str(err) + "\n"
		parser.print_help()
	
	if validArguments :
		sisInfo = sisinfo.SISInfo()
		sisInfo.parse(options.file)
		if options.structure :
			handler = ContentPrinter()
			sisInfo.traverse(handler)
		handler = Handler()
		sisInfo.traverse(handler)
		handler.execute(options)