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erikg / Revelation

Revelation is a password manager for the GNOME desktop, released under the GNU GPL license. It stores all your accounts and passwords in a single, secure place, and gives you access to it through a user-friendly graphical interface.

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Revelation / src / lib / misc.py

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revelation-0.3.2
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#
# Revelation 0.3.2 - a password manager for GNOME 2
# http://oss.codepoet.no/revelation/
# $Id$
#
# Module with miscellaneous functionality
#
#
# Copyright (c) 2003-2004 Erik Grinaker
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# 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
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#

import time, random, gconf, gtk


def escape_markup(string):
        "Escapes a string so it can be placed in a markup string"

        string = string.replace("&", "&")
        string = string.replace("<", "&lt;")
        string = string.replace(">", "&gt;")

        return string



def generate_password():
        "Generates a random password"

        def get_random_item(list):
                return list[int(random.random() * len(list))]


        client = gconf.client_get_default()
        pwlen = client.get_int("/apps/revelation/passwordgen/length")

        # set up list of chars to exclude
        exclude = []
        if client.get_bool("/apps/revelation/passwordgen/avoid_ambiguous") == gtk.TRUE:
                exclude = [ "0", "O", "I", "l", "1", "S", "5", "q", "g" ]


        # calculate the minimum share of the password for each character class
        sharedigits = int(round(pwlen * 0.15))
        sharechars = int(round(pwlen * 0.24))
        sharecaps = int(round(pwlen * 0.24))

        # set up a set of all usable ascii characters
        digits = range(48, 58)
        chars = range(65, 91)
        caps = range(97, 123)

        full = []
        full.extend(digits)
        full.extend(chars)
        full.extend(caps)


        # generate characters for the password
        pwchars = []
        while len(pwchars) < pwlen:

                # get digits
                if len(pwchars) < sharedigits:
                        char = chr(get_random_item(digits))

                # get chars
                elif len(pwchars) < sharechars + sharedigits:
                        char = chr(get_random_item(chars))

                # get caps
                elif len(pwchars) < sharecaps + sharechars + sharedigits:
                        char = chr(get_random_item(caps))

                # get random characters
                else:
                        char = chr(get_random_item(full))


                if char not in exclude:
                        pwchars.append(char)


        # shuffle the password
        password = ""
        for i in range(len(pwchars)):
                password += pwchars.pop(int(random.random() * len(pwchars)))

        return password



def timediff_simple(start, end = None):
        "Returns an approximate time difference in human-readable format"

        if end is None:
                end = time.time()

        if end < start:
                return None

        diff = int(end - start)

        gmstart = time.gmtime(start)
        gmend = time.gmtime(end)

        # get a human-readable time period
        if diff >= int(365.25 * 24 * 60 * 60):
                period = int(diff / 365.25 / 24 / 60 / 60)
                unit = "year"

        elif gmend.tm_mon - gmstart.tm_mon >= 2 or (gmend.tm_mon - gmstart.tm_mon == 1 and gmend.tm_mday >= gmstart.tm_mday):
                period = gmend.tm_mon - gmstart.tm_mon
                unit = "month"

        elif diff >= 7 * 24 * 60 * 60:
                period = diff / 7 / 24 / 60 / 60
                unit = "week"

        elif diff >= 24 * 60 * 60:
                period = diff / 24 / 60 / 60
                unit = "day"

        elif diff >= 60 * 60:
                period = diff / 60 / 60
                unit = "hour"

        elif diff >= 60:
                period = diff / 60
                unit = "minute"

        else:
                period = diff
                unit = "second"


        if period == 1:
                return str(period) + " " + unit

        else:
                return str(period) + " " + unit + "s"