symbian-qemu-0.9.1-12/python-2.6.1/Demo/pdist/security.py
author johnathan.white@2718R8BGH51.accenture.com
Mon, 08 Mar 2010 18:45:03 +0000
changeset 46 b6935a90ca64
parent 1 2fb8b9db1c86
permissions -rw-r--r--
Modify framebuffer and NGA framebuffer to read screen size from board model dtb file. Optimise memory usuage of frame buffer Add example minigui application with hooks to profiler (which writes results to S:\). Modified NGA framebuffer to run its own dfc queue at high priority

class Security:

    def __init__(self):
        import os
        env = os.environ
        if env.has_key('PYTHON_KEYFILE'):
            keyfile = env['PYTHON_KEYFILE']
        else:
            keyfile = '.python_keyfile'
            if env.has_key('HOME'):
                keyfile = os.path.join(env['HOME'], keyfile)
            if not os.path.exists(keyfile):
                import sys
                for dir in sys.path:
                    kf = os.path.join(dir, keyfile)
                    if os.path.exists(kf):
                        keyfile = kf
                        break
        try:
            self._key = eval(open(keyfile).readline())
        except IOError:
            raise IOError, "python keyfile %s: cannot open" % keyfile

    def _generate_challenge(self):
        import random
        return random.randint(100, 100000)

    def _compare_challenge_response(self, challenge, response):
        return self._encode_challenge(challenge) == response

    def _encode_challenge(self, challenge):
        p, m = self._key
        return pow(long(challenge), p, m)