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security.py
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139 lines (116 loc) · 4.92 KB
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# Xlib.ext.security -- SECURITY extension module
#
# Copyright (C) 2010-2013 Outpost Embedded, LLC
# Forest Bond <forest.bond@rapidrollout.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation; either version 2.1
# of the License, or (at your option) any later version.
#
# This library 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc.,
# 59 Temple Place,
# Suite 330,
# Boston, MA 02111-1307 USA
'''
A partial implementation of the SECURITY extension. Support for the
SecurityAuthorizationRevoked event is not implemented.
'''
from Xlib.protocol import rq
extname = 'SECURITY'
SecurityClientTrusted = 0
SecurityClientUntrusted = 1
SecurityAuthorizationRevokedMask = 1
AUTHID = rq.Card32
class QueryVersion(rq.ReplyRequest):
_request = rq.Struct(rq.Card8('opcode'),
rq.Opcode(0),
rq.RequestLength(),
rq.Card16('major_version'),
rq.Card16('minor_version')
)
_reply = rq.Struct(rq.ReplyCode(),
rq.Pad(1),
rq.Card16('sequence_number'),
rq.ReplyLength(),
rq.Card16('major_version'),
rq.Card16('minor_version'),
rq.Pad(20)
)
def query_version(self):
return QueryVersion(display=self.display,
opcode=self.display.get_extension_major(extname),
major_version=1,
minor_version=0)
class SecurityGenerateAuthorization(rq.ReplyRequest):
# The order of fields here does not match the specifications I've seen
# online, but it *does* match with the X.org implementation. I guess the
# spec is out-of-date.
_request = rq.Struct(rq.Card8('opcode'),
rq.Opcode(1),
rq.RequestLength(),
rq.LengthOf('auth_proto', 2),
rq.LengthOf('auth_data', 2),
rq.Card32('value_mask'),
rq.String8('auth_proto'),
rq.Binary('auth_data'),
rq.List('values', rq.Card32Obj)
)
_reply = rq.Struct(rq.ReplyCode(),
rq.Pad(1),
rq.Card16('sequence_number'),
rq.ReplyLength(),
AUTHID('authid'),
rq.LengthOf('auth_data_return', 2),
rq.Pad(18),
rq.Binary('auth_data_return')
)
def generate_authorization(self, auth_proto, auth_data=b'', timeout=None,
trust_level=None, group=None, event_mask=None):
value_mask = 0
values = []
if timeout is not None:
value_mask |= 1
values.append(timeout)
if trust_level is not None:
value_mask |= 2
values.append(trust_level)
if group is not None:
value_mask |= 4
values.append(group)
if event_mask is not None:
value_mask |= 8
values.append(event_mask)
return SecurityGenerateAuthorization(display=self.display,
opcode=self.display.get_extension_major(extname),
value_mask=value_mask,
auth_proto=auth_proto,
auth_data=auth_data,
values=values)
class SecurityRevokeAuthorization(rq.Request):
_request = rq.Struct(rq.Card8('opcode'),
rq.Opcode(2),
rq.RequestLength(),
AUTHID('authid')
)
def revoke_authorization(self, authid):
return SecurityRevokeAuthorization(display=self.display,
opcode=self.display.get_extension_major(extname),
authid=authid)
def init(disp, info):
disp.extension_add_method('display',
'security_query_version',
query_version)
disp.extension_add_method('display',
'security_generate_authorization',
generate_authorization)
disp.extension_add_method('display',
'security_revoke_authorization',
revoke_authorization)