~bzr-gtk/bzr-gtk/gtk2

# 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

__copyright__ = 'Copyright (C) 2008 Daniel Schierbeck'

__author__ = 'Daniel Schierbeck <daniel.schierbeck@gmail.com>'

import dbus

BUS_NAME = 'org.gnome.seahorse'

CRYPTO_INTERFACE = 'org.gnome.seahorse.CryptoService'

CRYPTO_PATH = '/org/gnome/seahorse/crypto'

OPENPGP_INTERFACE = 'org.gnome.seahorse.Keys'

OPENPGP_PATH = '/org/gnome/seahorse/keys/openpgp'

KEY_TYPE_OPENPGP = 'openpgp'

KEY_TYPE_SSH = 'ssh'

try:

    bus = dbus.SessionBus()

    crypto = dbus.Interface(bus.get_object(BUS_NAME, CRYPTO_PATH), 

                            CRYPTO_INTERFACE)

    openpgp = dbus.Interface(bus.get_object(BUS_NAME, OPENPGP_PATH),

                             OPENPGP_INTERFACE)

except dbus.exceptions.DBusException, e:

    get_name = getattr(e, 'get_dbus_name', None)

    if get_name is not None:

        name = get_name()

    else:

        name = getattr(e, '_dbus_error_name', None)

    if name is None:

        args = getattr(e, 'args', None) # This is case for old python-dbus-0.62

        if args == ("Unable to determine the address of the message bus (try 'man dbus-launch' and 'man dbus-daemon' for help)",):

            raise ImportError

    # DBus sometimes fails like this, just treat it as if seahorse is not

    # available rather than crashing.

    if name in ("org.freedesktop.DBus.Error.Spawn.ExecFailed", 

                "org.freedesktop.DBus.Error.ServiceUnknown"):

        raise ImportError

    else:

        raise

FLAG_VALID = 0x0001

FLAG_CAN_ENCRYPT = 0x0002

FLAG_CAN_SIGN = 0x0004

FLAG_EXPIRED = 0x0100

FLAG_REVOKED = 0x0200

FLAG_DISABLED = 0x0400

FLAG_TRUSTED = 0x1000

TRUST_NEVER = -1

TRUST_UNKNOWN = 0

TRUST_MARGINAL = 1

TRUST_FULL = 5

TRUST_ULTIMATE = 10

LOCATION_MISSING = 10

LOCATION_SEARCHING = 20

LOCATION_REMOTE = 50

LOCATION_LOCAL = 100

keyset = dict()

def verify(crypttext):

    (cleartext, key) = crypto.VerifyText(KEY_TYPE_OPENPGP, 1, crypttext)

    if key != "":

        if key not in keyset:

            keyset[key] = Key(key)

        return (cleartext, keyset[key])

    return (cleartext, None)

class Key:

    def __init__(self, key):

        self.key = key

        (keys, unmatched) = openpgp.MatchKeys([self.get_id()], 0x00000010)

        self.available = (key in keys)

        if self.available:

            fields = openpgp.GetKeyFields(key, ['fingerprint', 'trust', 'flags', 'display-name', 'location'])

        else:

            fields = dict()

        self.fingerprint = fields.get('fingerprint', 'N/A')

        self.trust = fields.get('trust', TRUST_UNKNOWN)

        self.flags = fields.get('flags', 0)

        self.display_name = fields.get('display-name', '')

        self.location = fields.get('location', LOCATION_MISSING)

    def get_flags(self):

        return self.flags

    def get_display_name(self):

        return self.display_name

    def get_id(self):

        return self.key.split(':')[1][8:]

    def get_fingerprint(self):

        return self.fingerprint

    def get_trust(self):

        return self.trust

    def get_location(self):

        return self.location

    def is_available(self):

        return self.available

    def is_trusted(self):

        return self.flags & FLAG_TRUSTED != 0