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GNU GENERAL PUBLIC LICENSE
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How to Apply These Terms to Your New Programs
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<http://www.gnu.org/philosophy/why-not-lgpl.html>.

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Python module and tools for communicating in the Assuan_ protocol.
There are a number of GnuPG_ wrappers for python `out there`__, but
they mostly work via the ``gpg`` executable. This is an attempt to
cut to the chase and speak directly to ``gpgme-tool`` (source__) over
a well-defined socket protocol.
__ wrappers_
__ gpgme-tool_
Installation
============
Packages
--------
Gentoo
~~~~~~
I've packaged ``pyassuan`` for Gentoo_. You need layman_ and
my `wtk overlay`_. Install with::
# emerge -av app-portage/layman
# layman --add wtk
# emerge -av dev-python/pyassuan
Dependencies
------------
``pyassuan`` is a simple package with no external dependencies outside
the Python 3.3+ standard library.
Installing by hand
------------------
``pyassuan`` is available as a Git_ repository::
$ git clone git://tremily.us/pyassuan.git
See the homepage_ for details. To install the checkout, run the
standard::
$ python setup.py install
Usage
=====
Checkout the docstrings and the examples in ``bin``.
Testing
=======
Run the internal unit tests with `Python 3.2+'s unittest discovery`__::
$ python -m unittest discover
To test running servers by hand, you can use `gpg-connect-agent`_.
Despite the name, this program can connect to any Assuan server::
$ gpg-connect-agent --raw-socket name
__ unittest-discovery_
Licence
=======
This project is distributed under the `GNU General Public License
Version 3`_ or greater.
Author
======
W. Trevor King
wking@tremily.us
.. _Assuan: http://www.gnupg.org/documentation/manuals/assuan/
.. _GnuPG: http://www.gnupg.org/
.. _wrappers: http://wiki.python.org/moin/GnuPrivacyGuard
.. _gpgme-tool:
http://git.gnupg.org/cgi-bin/gitweb.cgi?p=gpgme.git;a=blob;f=src/gpgme-tool.c;hb=HEAD
.. _Gentoo: http://www.gentoo.org/
.. _layman: http://layman.sourceforge.net/
.. _wtk overlay: http://blog.tremily.us/posts/Gentoo_overlay/
.. _Git: http://git-scm.com/
.. _homepage: http://blog.tremily.us/posts/pyassuan/
.. _gpg-connect-agent:
http://www.gnupg.org/documentation/manuals/gnupg-devel/gpg_002dconnect_002dagent.html
.. _unittest-discovery:
https://docs.python.org/3.5/library/unittest.html#unittest-test-discovery
.. _GNU General Public License Version 3: http://www.gnu.org/licenses/gpl.html

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#!/usr/bin/env python3
#
# Copyright (C) 2012 W. Trevor King <wking@tremily.us>
#
# This file is part of pyassuan.
#
# pyassuan 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 3 of the License, or (at your option) any later
# version.
#
# pyassuan 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
# pyassuan. If not, see <http://www.gnu.org/licenses/>.
"""Simple pinentry program for getting server info.
"""
from pyassuan import __version__
from pyassuan import client as _client
from pyassuan import common as _common
from pyassuan import error as _error
if __name__ == '__main__':
import argparse
import logging
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument(
'-v', '--version', action='version',
version='%(prog)s {}'.format(__version__))
parser.add_argument(
'-V', '--verbose', action='count', default=0,
help='increase verbosity')
parser.add_argument(
'filename',
help="path to server's unix socket")
args = parser.parse_args()
client = _client.AssuanClient(name='get-info', close_on_disconnect=True)
if args.verbose:
client.logger.setLevel(max(
logging.DEBUG, client.logger.level - 10*args.verbose))
client.connect(socket_path=args.filename)
try:
response = client.read_response()
assert response.type == 'OK', response
client.make_request(_common.Request('HELP'))
client.make_request(_common.Request('HELP GETINFO'))
for attribute in ['version', 'pid', 'socket_name', 'ssh_socket_name']:
try:
client.make_request(_common.Request('GETINFO', attribute))
except _error.AssuanError as e:
if e.message.startswith('No data'):
pass
else:
raise
finally:
client.make_request(_common.Request('BYE'))
client.disconnect()

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#!/usr/bin/env python3
#
# Copyright (C) 2012-2017 W. Trevor King <wking@tremily.us>
#
# This file is part of pyassuan.
#
# pyassuan 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 3 of the License, or (at your option) any later
# version.
#
# pyassuan 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
# pyassuan. If not, see <http://www.gnu.org/licenses/>.
"""Simple pinentry program for getting pins from a terminal.
"""
import copy as _copy
import os as _os
import os.path as _os_path
import pprint as _pprint
import re as _re
import signal as _signal
import sys as _sys
import termios as _termios
from pyassuan import __version__
from pyassuan import server as _server
from pyassuan import common as _common
from pyassuan import error as _error
class PinEntry (_server.AssuanServer):
"""pinentry protocol server
See ``pinentry-0.8.0/doc/pinentry.texi`` at::
ftp://ftp.gnupg.org/gcrypt/pinentry/
http://www.gnupg.org/aegypten/
for details on the pinentry interface.
Alternatively, you can just watch the logs and guess ;). Here's a
trace when driven by GnuPG 2.0.28 (libgcrypt 1.6.3)::
S: OK Your orders please
C: OPTION grab
S: OK
C: OPTION ttyname=/dev/pts/6
S: OK
C: OPTION ttytype=xterm
S: OK
C: OPTION lc-ctype=en_US.UTF-8
S: OK
C: OPTION lc-messages=en_US.UTF-8
S: OK
C: OPTION allow-external-password-cache
S: OK
C: OPTION default-ok=_OK
S: OK
C: OPTION default-cancel=_Cancel
S: OK
C: OPTION default-yes=_Yes
S: OK
C: OPTION default-no=_No
S: OK
C: OPTION default-prompt=PIN:
S: OK
C: OPTION default-pwmngr=_Save in password manager
S: OK
C: OPTION default-cf-visi=Do you really want to make your passphrase visible on the screen?
S: OK
C: OPTION default-tt-visi=Make passphrase visible
S: OK
C: OPTION default-tt-hide=Hide passphrase
S: OK
C: GETINFO pid
S: D 14309
S: OK
C: SETKEYINFO u/S9464F2C2825D2FE3
S: OK
C: SETDESC Enter passphrase%0A
S: OK
C: SETPROMPT Passphrase
S: OK
C: GETPIN
S: D testing!
S: OK
C: BYE
S: OK closing connection
"""
_digit_regexp = _re.compile(r'\d+')
# from proc(5): pid comm state ppid pgrp session tty_nr tpgid
_tpgrp_regexp = _re.compile(r'\d+ \(\S+\) . \d+ \d+ \d+ \d+ (\d+)')
def __init__(self, name='pinentry', strict_options=False,
single_request=True, **kwargs):
self.strings = {}
self.connection = {}
super(PinEntry, self).__init__(
name=name, strict_options=strict_options,
single_request=single_request, **kwargs)
self.valid_options.append('ttyname')
def reset(self):
super(PinEntry, self).reset()
self.strings.clear()
self.connection.clear()
# user interface
def _connect(self):
self.logger.info('connecting to user')
self.logger.debug('options:\n{}'.format(_pprint.pformat(self.options)))
tty_name = self.options.get('ttyname', None)
if tty_name:
self.connection['tpgrp'] = self._get_pgrp(tty_name)
self.logger.info(
'open to-user output stream for {}'.format(tty_name))
self.connection['to_user'] = open(tty_name, 'w')
self.logger.info(
'open from-user input stream for {}'.format(tty_name))
self.connection['from_user'] = open(tty_name, 'r')
self.logger.info('get current termios line discipline')
self.connection['original termios'] = _termios.tcgetattr(
self.connection['to_user']) # [iflag, oflag, cflag, lflag, ...]
new_termios = _copy.deepcopy(self.connection['original termios'])
# translate carriage return to newline on input
new_termios[0] |= _termios.ICRNL
# do not ignore carriage return on input
new_termios[0] &= ~_termios.IGNCR
# do not echo input characters
new_termios[3] &= ~_termios.ECHO
# echo input characters
#new_termios[3] |= _termios.ECHO
# echo the NL character even if ECHO is not set
new_termios[3] |= _termios.ECHONL
# enable canonical mode
new_termios[3] |= _termios.ICANON
self.logger.info('adjust termios line discipline')
_termios.tcsetattr(
self.connection['to_user'], _termios.TCSANOW, new_termios)
self.logger.info('send SIGSTOP to pgrp {}'.format(
self.connection['tpgrp']))
#_os.killpg(self.connection['tpgrp'], _signal.SIGSTOP)
_os.kill(-self.connection['tpgrp'], _signal.SIGSTOP)
self.connection['tpgrp stopped'] = True
else:
self.logger.info('no TTY name given; use stdin/stdout for I/O')
self.connection['to_user'] = _sys.stdout
self.connection['from_user'] = _sys.stdin
self.logger.info('connected to user')
self.connection['to_user'].write('\n') # give a clean line to work on
self.connection['active'] = True
def _disconnect(self):
self.logger.info('disconnecting from user')
try:
if self.connection.get('original termios', None):
self.logger.info('restore original termios line discipline')
_termios.tcsetattr(
self.connection['to_user'], _termios.TCSANOW,
self.connection['original termios'])
if self.connection.get('tpgrp stopped', None) is True:
self.logger.info(
'send SIGCONT to pgrp {}'.format(self.connection['tpgrp']))
#_os.killpg(self.connection['tpgrp'], _signal.SIGCONT)
_os.kill(-self.connection['tpgrp'], _signal.SIGCONT)
if self.connection.get('to_user', None) not in [None, _sys.stdout]:
self.logger.info('close to-user output stream')
self.connection['to_user'].close()
if self.connection.get('from_user',None) not in [None,_sys.stdout]:
self.logger.info('close from-user input stream')
self.connection['from_user'].close()
finally:
self.connection = {'active': False}
self.logger.info('disconnected from user')
def _get_pgrp(self, tty_name):
self.logger.info('find process group contolling {}'.format(tty_name))
proc = '/proc'
for name in _os.listdir(proc):
path = _os_path.join(proc, name)
if not (self._digit_regexp.match(name) and _os_path.isdir(path)):
continue # not a process directory
self.logger.debug('checking process {}'.format(name))
fd_path = _os_path.join(path, 'fd', '0')
try:
link = _os.readlink(fd_path)
except OSError as e:
self.logger.debug('not our process: {}'.format(e))
continue # permission denied (not one of our processes)
if link != tty_name:
self.logger.debug('wrong tty: {}'.format(link))
continue # not attached to our target tty
stat_path = _os_path.join(path, 'stat')
stat = open(stat_path, 'r').read()
self.logger.debug('check stat for pgrp: {}'.format(stat))
match = self._tpgrp_regexp.match(stat)
assert match != None, stat
pgrp = int(match.group(1))
self.logger.info('found pgrp {} for {}'.format(pgrp, tty_name))
return pgrp
raise ValueError(tty_name)
def _write(self, string):
"Write text to the user's terminal."
self.connection['to_user'].write(string + '\n')
self.connection['to_user'].flush()
def _read(self):
"Read and return a line from the user's terminal."
# drop trailing newline
return self.connection['from_user'].readline()[:-1]
def _prompt(self, prompt='?', error=None, add_colon=True):
if add_colon:
prompt += ':'
if error:
self.connection['to_user'].write(error)
self.connection['to_user'].write('\n')
self.connection['to_user'].write(prompt)
self.connection['to_user'].write(' ')
self.connection['to_user'].flush()
return self._read()
# assuan handlers
def _handle_GETINFO(self, arg):
if arg == 'pid':
yield _common.Response('D', str(_os.getpid()).encode('ascii'))
elif arg == 'version':
yield _common.Response('D', __version__.encode('ascii'))
else:
raise _error.AssuanError(message='Invalid parameter')
yield _common.Response('OK')
def _handle_SETKEYINFO(self, arg):
self.strings['key info'] = arg
yield _common.Response('OK')
def _handle_CLEARPASSPHRASE(self, arg):
yield _common.Response('OK')
def _handle_SETDESC(self, arg):
self.strings['description'] = arg
yield _common.Response('OK')
def _handle_SETPROMPT(self, arg):
self.strings['prompt'] = arg
yield _common.Response('OK')
def _handle_SETERROR(self, arg):
self.strings['error'] = arg
yield _common.Response('OK')
def _handle_SETTITLE(self, arg):
self.strings['title'] = arg
yield _common.Response('OK')
def _handle_SETOK(self, arg):
self.strings['ok'] = arg
yield _common.Response('OK')
def _handle_SETCANCEL(self, arg):
self.strings['cancel'] = arg
yield _common.Response('OK')
def _handle_SETNOTOK(self, arg):
self.strings['not ok'] = arg
yield _common.Response('OK')
def _handle_SETQUALITYBAR(self, arg):
"""Adds a quality indicator to the GETPIN window.
This indicator is updated as the passphrase is typed. The
clients needs to implement an inquiry named "QUALITY" which
gets passed the current passphrase (percent-plus escaped) and
should send back a string with a single numerical vauelue
between -100 and 100. Negative values will be displayed in
red.
If a custom label for the quality bar is required, just add
that label as an argument as percent escaped string. You will
need this feature to translate the label because pinentry has
no internal gettext except for stock strings from the toolkit
library.
If you want to show a tooltip for the quality bar, you may use
C: SETQUALITYBAR_TT string
S: OK
With STRING being a percent escaped string shown as the tooltip.
Here is a real world example of these commands in use:
C: SETQUALITYBAR Quality%3a
S: OK
C: SETQUALITYBAR_TT The quality of the text entered above.%0aPlease ask your administrator for details about the criteria.
S: OK
"""
self.strings['qualitybar'] = arg
yield _common.Response('OK')
def _handle_SETQUALITYBAR_TT(self, arg):
self.strings['qualitybar_tooltip'] = arg
yield _common.Response('OK')
def _handle_GETPIN(self, arg):
try:
self._connect()
self._write(self.strings['description'])
if 'key info' in self.strings:
self._write('key: {}'.format(self.strings['key info']))
if 'qualitybar' in self.strings:
self._write(self.strings['qualitybar'])
pin = self._prompt(
prompt=self.strings['prompt'],
error=self.strings.get('error'),
add_colon=False)
finally:
self._disconnect()
yield _common.Response('D', pin.encode('ascii'))
yield _common.Response('OK')
def _handle_CONFIRM(self, arg):
try:
self._connect()
self._write(self.strings['description'])
self._write('1) '+self.strings['ok'])
self._write('2) '+self.strings['not ok'])
value = self._prompt('?')
finally:
self._disconnect()
if value == '1':
yield _common.Response('OK')
else:
raise _error.AssuanError(message='Not confirmed')
def _handle_MESSAGE(self, arg):
self._write(self.strings['description'])
yield _common.Response('OK')
def _handle_CONFIRM(self, args):
assert args == '--one-button', args
try:
self._connect()
self._write(self.strings['description'])
self._write('1) '+self.strings['ok'])
value = self._prompt('?')
finally:
self._disconnect()
assert value == '1', value
yield _common.Response('OK')
if __name__ == '__main__':
import argparse
import logging
import traceback
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument(
'-v', '--version', action='version',
version='%(prog)s {}'.format(__version__))
parser.add_argument(
'-V', '--verbose', action='count', default=0,
help='increase verbosity')
parser.add_argument(
'--display',
help='set X display (ignored by this implementation)')
args = parser.parse_args()
p = PinEntry()
if args.verbose:
p.logger.setLevel(max(
logging.DEBUG, p.logger.level - 10*args.verbose))
try:
p.run()
except:
p.logger.error(
'exiting due to exception:\n{}'.format(
traceback.format_exc().rstrip()))
raise

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# Copyright (C) 2012 W. Trevor King <wking@tremily.us>
#
# This file is part of pyassuan.
#
# pyassuan 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 3 of the License, or (at your option) any later
# version.
#
# pyassuan 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
# pyassuan. If not, see <http://www.gnu.org/licenses/>.
"""A Python implementation of the `Assuan protocol`_.
.. _Assuan protocol: http://www.gnupg.org/documentation/manuals/assuan/
"""
import logging as _logging
import logging.handlers as _logging_handlers
__version__ = '0.2'
LOG = _logging.getLogger('pyassuan')
LOG.setLevel(_logging.ERROR)
LOG.addHandler(_logging.StreamHandler())
#LOG.addHandler(_logging.FileHandler('/tmp/pinentry.log'))
#LOG.addHandler(_logging_handlers.SysLogHandler(address='/dev/log'))
LOG.handlers[0].setFormatter(
_logging.Formatter('%(name)s: %(levelname)s: %(message)s'))

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# Copyright (C) 2012 W. Trevor King <wking@tremily.us>
#
# This file is part of pyassuan.
#
# pyassuan 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 3 of the License, or (at your option) any later
# version.
#
# pyassuan 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
# pyassuan. If not, see <http://www.gnu.org/licenses/>.
import logging as _logging
import socket as _socket
import sys as _sys
from . import LOG as _LOG
from . import common as _common
from . import error as _error
class AssuanClient (object):
"""A single-threaded Assuan client based on the `development suggestions`_
.. _development suggestions:
http://www.gnupg.org/documentation/manuals/assuan/Client-code.html
"""
def __init__(self, name, logger=_LOG, use_sublogger=True,
close_on_disconnect=False):
self.name = name
if use_sublogger:
logger = _logging.getLogger('{}.{}'.format(logger.name, self.name))
self.logger = logger
self.close_on_disconnect = close_on_disconnect
self.input = self.output = self.socket = None
def connect(self, socket_path=None):
if socket_path:
self.logger.info(
'connect to Unix socket at {}'.format(socket_path))
self.socket = _socket.socket(_socket.AF_UNIX, _socket.SOCK_STREAM)
self.socket.connect(socket_path)
self.input = self.socket.makefile('rb')
self.output = self.socket.makefile('wb')
else:
if not self.input:
self.logger.info('read from stdin')
self.input = _sys.stdin.buffer
if not self.output:
self.logger.info('write to stdout')
self.output = _sys.stdout.buffer
def disconnect(self):
if self.close_on_disconnect:
self.logger.info('disconnecting')
if self.input is not None:
self.input.close()
self.input = None
if self.output is not None:
self.output.close()
self.output = None
if self.socket is not None:
self.socket.shutdown(_socket.SHUT_RDWR)
self.socket.close()
self.socket = None
def raise_error(self, error):
self.logger.error(str(error))
raise(error)
def read_response(self):
line = self.input.readline()
if not line:
self.raise_error(
_error.AssuanError(message='IPC accept call failed'))
if len(line) > _common.LINE_LENGTH:
self.raise_error(
_error.AssuanError(message='Line too long'))
if not line.endswith(b'\n'):
self.logger.info('S: {}'.format(line))
self.raise_error(
_error.AssuanError(message='Invalid response'))
line = line[:-1] # remove trailing newline
response = _common.Response()
try:
response.from_bytes(line)
except _error.AssuanError as e:
self.logger.error(str(e))
raise
self.logger.info('S: {}'.format(response))
return response
def _write_request(self, request):
self.logger.info('C: {}'.format(request))
self.output.write(bytes(request))
self.output.write(b'\n')
try:
self.output.flush()
except IOError:
raise
def make_request(self, request, response=True, expect=['OK']):
self._write_request(request=request)
if response:
return self.get_responses(requests=[request], expect=expect)
def get_responses(self, requests=None, expect=['OK']):
responses = list(self.responses())
if responses[-1].type == 'ERR':
eresponse = responses[-1]
fields = eresponse.parameters.split(' ', 1)
code = int(fields[0])
if len(fields) > 1:
message = fields[1].strip()
else:
message = None
error = _error.AssuanError(code=code, message=message)
if requests is not None:
error.requests = requests
error.responses = responses
raise error
if expect:
assert responses[-1].type in expect, [str(r) for r in responses]
data = []
for response in responses:
if response.type == 'D':
data.append(response.parameters)
if data:
data = b''.join(data)
else:
data = None
return (responses, data)
def responses(self):
while True:
response = self.read_response()
yield response
if response.type not in ['S', '#', 'D']:
break
def send_data(self, data=None, response=True, expect=['OK']):
"""Iterate through requests necessary to send ``data`` to a server.
http://www.gnupg.org/documentation/manuals/assuan/Client-requests.html
"""
requests = []
if data:
encoded_data = _common.encode(data)
start = 0
stop = min(_common.LINE_LENGTH-4, len(encoded_data)) # 'D ', CR, CL
self.logger.debug('sending {} bytes of encoded data'.format(
len(encoded_data)))
while stop > start:
d = encoded_data[start:stop]
request = _common.Request(
command='D', parameters=encoded_data[start:stop],
encoded=True)
requests.append(request)
self.logger.debug('send {} byte chunk'.format(stop-start))
self._write_request(request=request)
start = stop
stop = start + min(_common.LINE_LENGTH-4,
len(encoded_data) - start)
request = _common.Request('END')
requests.append(request)
self._write_request(request=request)
if response:
return self.get_responses(requests=requests, expect=expect)
def send_fds(self, fds):
"""Send a file descriptor over a Unix socket.
"""
msg = '# descriptors in flight: {}\n'.format(fds)
self.logger.info('C: {}'.format(msg.rstrip('\n')))
msg = msg.encode('ascii')
return _common.send_fds(
socket=self.socket, msg=msg, fds=fds, logger=None)
def receive_fds(self, msglen=200, maxfds=10):
"""Receive file descriptors over a Unix socket.
"""
msg,fds = _common.receive_fds(
socket=self.socket, msglen=msglen, maxfds=maxfds, logger=None)
msg = str(msg, 'utf-8')
self.logger.info('S: {}'.format(msg.rstrip('\n')))
return fds

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# Copyright (C) 2012 W. Trevor King <wking@tremily.us>
#
# This file is part of pyassuan.
#
# pyassuan 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 3 of the License, or (at your option) any later
# version.
#
# pyassuan 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
# pyassuan. If not, see <http://www.gnu.org/licenses/>.
"""Items common to both the client and server
"""
import array as _array
import re as _re
import socket as _socket
from . import LOG as _LOG
from . import error as _error
LINE_LENGTH = 1002 # 1000 + [CR,]LF
_ENCODE_PATTERN = '(' + '|'.join(['%', '\r', '\n']) + ')'
_ENCODE_STR_REGEXP = _re.compile(_ENCODE_PATTERN)
_ENCODE_BYTE_REGEXP = _re.compile(_ENCODE_PATTERN.encode('ascii'))
_DECODE_STR_REGEXP = _re.compile('(%[0-9A-Fa-f]{2})')
_DECODE_BYTE_REGEXP = _re.compile(b'(%[0-9A-Fa-f]{2})')
_REQUEST_REGEXP = _re.compile('^(\w+)( *)(.*)\Z')
def encode(data):
r"""
>>> encode('It grew by 5%!\n')
'It grew by 5%25!%0A'
>>> encode(b'It grew by 5%!\n')
b'It grew by 5%25!%0A'
"""
if isinstance(data, bytes):
regexp = _ENCODE_BYTE_REGEXP
else:
regexp = _ENCODE_STR_REGEXP
return regexp.sub(
lambda x : to_hex(x.group()), data)
def decode(data):
r"""
>>> decode('%22Look out!%22%0AWhere%3F')
'"Look out!"\nWhere?'
>>> decode(b'%22Look out!%22%0AWhere%3F')
b'"Look out!"\nWhere?'
"""
if isinstance(data, bytes):
regexp = _DECODE_BYTE_REGEXP
else:
regexp = _DECODE_STR_REGEXP
return regexp.sub(
lambda x : from_hex(x.group()), data)
def from_hex(code):
r"""
>>> from_hex('%22')
'"'
>>> from_hex('%0A')
'\n'
>>> from_hex(b'%0A')
b'\n'
"""
c = chr(int(code[1:], 16))
if isinstance(code, bytes):
c =c.encode('ascii')
return c
def to_hex(char):
r"""
>>> to_hex('"')
'%22'
>>> to_hex('\n')
'%0A'
>>> to_hex(b'\n')
b'%0A'
"""
hx = '%{:02X}'.format(ord(char))
if isinstance(char, bytes):
hx = hx.encode('ascii')
return hx
class Request (object):
"""A client request
http://www.gnupg.org/documentation/manuals/assuan/Client-requests.html
>>> r = Request(command='BYE')
>>> str(r)
'BYE'
>>> r = Request(command='OPTION', parameters='testing at 5%')
>>> str(r)
'OPTION testing at 5%25'
>>> bytes(r)
b'OPTION testing at 5%25'
>>> r.from_bytes(b'BYE')
>>> r.command
'BYE'
>>> print(r.parameters)
None
>>> r.from_bytes(b'OPTION testing at 5%25')
>>> r.command
'OPTION'
>>> print(r.parameters)
testing at 5%
>>> r.from_bytes(b' invalid')
Traceback (most recent call last):
...
pyassuan.error.AssuanError: 170 Invalid request
>>> r.from_bytes(b'in-valid')
Traceback (most recent call last):
...
pyassuan.error.AssuanError: 170 Invalid request
"""
def __init__(self, command=None, parameters=None, encoded=False):
self.command = command
self.parameters = parameters
self.encoded = encoded
def __str__(self):
if self.parameters:
if self.encoded:
encoded_parameters = self.parameters
else:
encoded_parameters = encode(self.parameters)
return '{} {}'.format(self.command, encoded_parameters)
return self.command
def __bytes__(self):
if self.parameters:
if self.encoded:
encoded_parameters = self.parameters
else:
encoded_parameters = encode(self.parameters)
return '{} {}'.format(
self.command, encoded_parameters).encode('utf-8')
return self.command.encode('utf-8')
def from_bytes(self, line):
if len(line) > 1000: # TODO: byte-vs-str and newlines?
raise _error.AssuanError(message='Line too long')
line = str(line, encoding='utf-8')
match = _REQUEST_REGEXP.match(line)
if not match:
raise _error.AssuanError(message='Invalid request')
self.command = match.group(1)
if match.group(3):
if match.group(2):
self.parameters = decode(match.group(3))
else:
raise _error.AssuanError(message='Invalid request')
else:
self.parameters = None
class Response (object):
"""A server response
http://www.gnupg.org/documentation/manuals/assuan/Server-responses.html
>>> r = Response(type='OK')
>>> str(r)
'OK'
>>> r = Response(type='ERR', parameters='1 General error')
>>> str(r)
'ERR 1 General error'
>>> bytes(r)
b'ERR 1 General error'
>>> r.from_bytes(b'OK')
>>> r.type
'OK'
>>> print(r.parameters)
None
>>> r.from_bytes(b'ERR 1 General error')
>>> r.type
'ERR'
>>> print(r.parameters)
1 General error
>>> r.from_bytes(b' invalid')
Traceback (most recent call last):
...
pyassuan.error.AssuanError: 76 Invalid response
>>> r.from_bytes(b'in-valid')
Traceback (most recent call last):
...
pyassuan.error.AssuanError: 76 Invalid response
"""
types = {
'O': 'OK',
'E': 'ERR',
'S': 'S',
'#': '#',
'D': 'D',
'I': 'INQUIRE',
}
def __init__(self, type=None, parameters=None):
self.type = type
self.parameters = parameters
def __str__(self):
if self.parameters:
return '{} {}'.format(self.type, encode(self.parameters))
return self.type
def __bytes__(self):
if self.parameters:
if self.type == 'D':
return b' '.join((b'D', self.parameters))
else:
return '{} {}'.format(
self.type, encode(self.parameters)).encode('utf-8')
return self.type.encode('utf-8')
def from_bytes(self, line):
if len(line) > 1000: # TODO: byte-vs-str and newlines?
raise _error.AssuanError(message='Line too long')
if line.startswith(b'D'):
self.command = t = 'D'
else:
line = str(line, encoding='utf-8')
t = line[0]
try:
type = self.types[t]
except KeyError:
raise _error.AssuanError(message='Invalid response')
self.type = type
if type == 'D': # data
self.parameters = decode(line[2:])
elif type == '#': # comment
self.parameters = decode(line[2:])
else:
match = _REQUEST_REGEXP.match(line)
if not match:
raise _error.AssuanError(message='Invalid request')
if match.group(3):
if match.group(2):
self.parameters = decode(match.group(3))
else:
raise _error.AssuanError(message='Invalid request')
else:
self.parameters = None
def error_response(error):
"""
>>> from pyassuan.error import AssuanError
>>> error = AssuanError(1)
>>> response = error_response(error)
>>> print(response)
ERR 1 General error
"""
return Response(type='ERR', parameters=str(error))
def send_fds(socket, msg=None, fds=None, logger=_LOG):
"""Send a file descriptor over a Unix socket using ``sendmsg``.
``sendmsg`` suport requires Python >= 3.3.
Code from
http://docs.python.org/dev/library/socket.html#socket.socket.sendmsg
Assuan equivalent is
http://www.gnupg.org/documentation/manuals/assuan/Client-code.html#function-assuan_005fsendfd
"""
if msg is None:
msg = b''.join(
[b'# descriptors in flight: ', str(fds).encode('ascii'), b'\n'])
if logger is not None:
logger.debug('sending file descriptors {} down {}'.format(fds, socket))
return socket.sendmsg(
[msg],
[(_socket.SOL_SOCKET, _socket.SCM_RIGHTS, _array.array('i', fds))])
def receive_fds(socket, msglen=200, maxfds=10, logger=_LOG):
"""Recieve file descriptors using ``recvmsg``.
``recvmsg`` suport requires Python >= 3.3.
Code from http://docs.python.org/dev/library/socket.html
Assuan equivalent is
http://www.gnupg.org/documentation/manuals/assuan/Client-code.html#fun_002dassuan_005freceivedfd
"""
fds = _array.array('i') # Array of ints
msg,ancdata,flags,addr = socket.recvmsg(
msglen, _socket.CMSG_LEN(maxfds * fds.itemsize))
for cmsg_level,cmsg_type,cmsg_data in ancdata:
if (cmsg_level == _socket.SOL_SOCKET and
cmsg_type == _socket.SCM_RIGHTS):
# Append data, ignoring any truncated integers at the end.
fds.fromstring(
cmsg_data[:len(cmsg_data) - (len(cmsg_data) % fds.itemsize)])
if logger is not None:
logger.debug('receiving file descriptors {} from {} ({})'.format(
fds, socket, msg))
return (msg, list(fds))

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# Copyright (C) 2012 W. Trevor King <wking@tremily.us>
#
# This file is part of pyassuan.
#
# pyassuan 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 3 of the License, or (at your option) any later
# version.
#
# pyassuan 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
# pyassuan. If not, see <http://www.gnu.org/licenses/>.
"""Assuan errors as defined in `libgpg-error`_.
The Assuan_ docs_ suggest these error codes.
.. _libgpg-error: http://www.gnupg.org/related_software/libgpg-error/
.. _Assuan:
http://www.gnupg.org/documentation/manuals/assuan/Server-responses.html
.. _docs: http://www.gnupg.org/documentation/manuals/assuan/Error-codes.html
"""
MESSAGE = { # extracted from libgpg-error-1.10/src/err-codes.h and gpg-error.h
0: 'Success',
1: 'General error',
2: 'Unknown packet',
3: 'Unknown version in packet',
4: 'Invalid public key algorithm',
5: 'Invalid digest algorithm',
6: 'Bad public key',
7: 'Bad secret key',
8: 'Bad signature',
9: 'No public key',
10: 'Checksum error',
11: 'Bad passphrase',
12: 'Invalid cipher algorithm',
13: 'Keyring open',
14: 'Invalid packet',
15: 'Invalid armor',
16: 'No user ID',
17: 'No secret key',
18: 'Wrong secret key used',
19: 'Bad session key',
20: 'Unknown compression algorithm',
21: 'Number is not prime',
22: 'Invalid encoding method',
23: 'Invalid encryption scheme',
24: 'Invalid signature scheme',
25: 'Invalid attribute',
26: 'No value',
27: 'Not found',
28: 'Value not found',
29: 'Syntax error',
30: 'Bad MPI value',
31: 'Invalid passphrase',
32: 'Invalid signature class',
33: 'Resources exhausted',
34: 'Invalid keyring',
35: 'Trust DB error',
36: 'Bad certificate',
37: 'Invalid user ID',
38: 'Unexpected error',
39: 'Time conflict',
40: 'Keyserver error',
41: 'Wrong public key algorithm',
42: 'Tribute to D. A.',
43: 'Weak encryption key',
44: 'Invalid key length',
45: 'Invalid argument',
46: 'Syntax error in URI',
47: 'Invalid URI',
48: 'Network error',
49: 'Unknown host',
50: 'Selftest failed',
51: 'Data not encrypted',
52: 'Data not processed',
53: 'Unusable public key',
54: 'Unusable secret key',
55: 'Invalid value',
56: 'Bad certificate chain',
57: 'Missing certificate',
58: 'No data',
59: 'Bug',
60: 'Not supported',
61: 'Invalid operation code',
62: 'Timeout',
63: 'Internal error',
64: 'EOF (gcrypt)',
65: 'Invalid object',
66: 'Provided object is too short',
67: 'Provided object is too large',
68: 'Missing item in object',
69: 'Not implemented',
70: 'Conflicting use',
71: 'Invalid cipher mode',
72: 'Invalid flag',
73: 'Invalid handle',
74: 'Result truncated',
75: 'Incomplete line',
76: 'Invalid response',
77: 'No agent running',
78: 'agent error',
79: 'Invalid data',
80: 'Unspecific Assuan server fault',
81: 'General Assuan error',
82: 'Invalid session key',
83: 'Invalid S-expression',
84: 'Unsupported algorithm',
85: 'No pinentry',
86: 'pinentry error',
87: 'Bad PIN',
88: 'Invalid name',
89: 'Bad data',
90: 'Invalid parameter',
91: 'Wrong card',
92: 'No dirmngr',
93: 'dirmngr error',
94: 'Certificate revoked',
95: 'No CRL known',
96: 'CRL too old',
97: 'Line too long',
98: 'Not trusted',
99: 'Operation cancelled',
100: 'Bad CA certificate',
101: 'Certificate expired',
102: 'Certificate too young',
103: 'Unsupported certificate',
104: 'Unknown S-expression',
105: 'Unsupported protection',
106: 'Corrupted protection',
107: 'Ambiguous name',
108: 'Card error',
109: 'Card reset required',
110: 'Card removed',
111: 'Invalid card',
112: 'Card not present',
113: 'No PKCS15 application',
114: 'Not confirmed',
115: 'Configuration error',
116: 'No policy match',
117: 'Invalid index',
118: 'Invalid ID',
119: 'No SmartCard daemon',
120: 'SmartCard daemon error',
121: 'Unsupported protocol',
122: 'Bad PIN method',
123: 'Card not initialized',
124: 'Unsupported operation',
125: 'Wrong key usage',
126: 'Nothing found',
127: 'Wrong blob type',
128: 'Missing value',
129: 'Hardware problem',
130: 'PIN blocked',
131: 'Conditions of use not satisfied',
132: 'PINs are not synced',
133: 'Invalid CRL',
134: 'BER error',
135: 'Invalid BER',
136: 'Element not found',
137: 'Identifier not found',
138: 'Invalid tag',
139: 'Invalid length',
140: 'Invalid key info',
141: 'Unexpected tag',
142: 'Not DER encoded',
143: 'No CMS object',
144: 'Invalid CMS object',
145: 'Unknown CMS object',
146: 'Unsupported CMS object',
147: 'Unsupported encoding',
148: 'Unsupported CMS version',
149: 'Unknown algorithm',
150: 'Invalid crypto engine',
151: 'Public key not trusted',
152: 'Decryption failed',
153: 'Key expired',
154: 'Signature expired',
155: 'Encoding problem',
156: 'Invalid state',
157: 'Duplicated value',
158: 'Missing action',
159: 'ASN.1 module not found',
160: 'Invalid OID string',
161: 'Invalid time',
162: 'Invalid CRL object',
163: 'Unsupported CRL version',
164: 'Invalid certificate object',
165: 'Unknown name',
166: 'A locale function failed',
167: 'Not locked',
168: 'Protocol violation',
169: 'Invalid MAC',
170: 'Invalid request',
171: 'Unknown extension',
172: 'Unknown critical extension',
173: 'Locked',
174: 'Unknown option',
175: 'Unknown command',
176: 'Not operational',
177: 'No passphrase given',
178: 'No PIN given',
179: 'Not enabled',
180: 'No crypto engine',
181: 'Missing key',
182: 'Too many objects',
183: 'Limit reached',
184: 'Not initialized',
185: 'Missing issuer certificate',
198: 'Operation fully cancelled',
199: 'Operation not yet finished',
200: 'Buffer too short',
201: 'Invalid length specifier in S-expression',
202: 'String too long in S-expression',
203: 'Unmatched parentheses in S-expression',
204: 'S-expression not canonical',
205: 'Bad character in S-expression',
206: 'Bad quotation in S-expression',
207: 'Zero prefix in S-expression',
208: 'Nested display hints in S-expression',
209: 'Unmatched display hints',
210: 'Unexpected reserved punctuation in S-expression',
211: 'Bad hexadecimal character in S-expression',
212: 'Odd hexadecimal numbers in S-expression',
213: 'Bad octal character in S-expression',
257: 'General IPC error',
258: 'IPC accept call failed',
259: 'IPC connect call failed',
260: 'Invalid IPC response',
261: 'Invalid value passed to IPC',
262: 'Incomplete line passed to IPC',
263: 'Line passed to IPC too long',
264: 'Nested IPC commands',
265: 'No data callback in IPC',
266: 'No inquire callback in IPC',
267: 'Not an IPC server',
268: 'Not an IPC client',
269: 'Problem starting IPC server',
270: 'IPC read error',
271: 'IPC write error',
273: 'Too much data for IPC layer',
274: 'Unexpected IPC command',
275: 'Unknown IPC command',
276: 'IPC syntax error',
277: 'IPC call has been cancelled',
278: 'No input source for IPC',
279: 'No output source for IPC',
280: 'IPC parameter error',
281: 'Unknown IPC inquire',
1024: 'User defined error code 1',
1025: 'User defined error code 2',
1026: 'User defined error code 3',
1027: 'User defined error code 4',
1028: 'User defined error code 5',
1029: 'User defined error code 6',
1030: 'User defined error code 7',
1031: 'User defined error code 8',
1032: 'User defined error code 9',
1033: 'User defined error code 10',
1034: 'User defined error code 11',
1035: 'User defined error code 12',
1036: 'User defined error code 13',
1037: 'User defined error code 14',
1038: 'User defined error code 15',
1039: 'User defined error code 16',
16381: 'System error w/o errno',
16382: 'Unknown system error',
16383: 'End of file',
}
UNKNOWN = 'Unknown error code'
CODE = dict((message,code) for code,message in MESSAGE.items())
# TODO: system errors (GPG_ERR_E2BIG = GPG_ERR_SYSTEM_ERROR | 0, etc.)
class AssuanError (Exception):
r"""
>>> e = AssuanError(1)
>>> print(e)
1 General error
>>> e = AssuanError(1024, 'testing!')
>>> print(e)
1024 testing!
>>> e = AssuanError(message='Unknown packet')
>>> print(e)
2 Unknown packet
"""
def __init__(self, code=None, message=None):
if code is None and message is None:
raise ValueError('missing both `code` and `message`')
if message is None:
message = MESSAGE[code]
if code is None:
code = CODE.get(message, UNKNOWN)
self.code = code
self.message = message
super(AssuanError, self).__init__('{} {}'.format(code, message))

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# Copyright (C) 2012 W. Trevor King <wking@tremily.us>
#
# This file is part of pyassuan.
#
# pyassuan 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 3 of the License, or (at your option) any later
# version.
#
# pyassuan 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
# pyassuan. If not, see <http://www.gnu.org/licenses/>.
import logging as _logging
import re as _re
import socket as _socket
import sys as _sys
import threading as _threading
import traceback as _traceback
from . import LOG as _LOG
from . import common as _common
from . import error as _error
_OPTION_REGEXP = _re.compile('^-?-?([-\w]+)( *)(=?) *(.*?) *\Z')
class AssuanServer (object):
"""A single-threaded Assuan server based on the `devolpment suggestions`_
Extend by subclassing and adding ``_handle_XXX`` methods for each
command you want to handle.
.. _development suggestions:
http://www.gnupg.org/documentation/manuals/assuan/Server-code.html
"""
def __init__(self, name, logger=_LOG, use_sublogger=True,
valid_options=None, strict_options=True,
single_request=False, listen_to_quit=False,
close_on_disconnect=False):
self.name = name
if use_sublogger:
logger = _logging.getLogger('{}.{}'.format(logger.name, self.name))
self.logger = logger
if valid_options is None:
valid_options = []
self.valid_options = valid_options
self.strict_options = strict_options
self.single_request = single_request
self.listen_to_quit = listen_to_quit
self.close_on_disconnect = close_on_disconnect
self.input = self.output = None
self.options = {}
self.reset()
def reset(self):
self.stop = False
self.options.clear()
def run(self):
self.reset()
self.logger.info('running')
self.connect()
try:
self.handle_requests()
finally:
self.disconnect()
self.logger.info('stopping')
def connect(self):
if not self.input:
self.logger.info('read from stdin')
self.input = _sys.stdin.buffer
if not self.output:
self.logger.info('write to stdout')
self.output = _sys.stdout.buffer
def disconnect(self):
if self.close_on_disconnect:
self.logger.info('disconnecting')
self.input = None
self.output = None
def handle_requests(self):
self.send_response(_common.Response('OK', 'Your orders please'))
self.output.flush()
while not self.stop:
line = self.input.readline()
if not line:
break # EOF
if len(line) > _common.LINE_LENGTH:
self.raise_error(
_error.AssuanError(message='Line too long'))
if not line.endswith(b'\n'):
self.logger.info('C: {}'.format(line))
self.send_error_response(
_error.AssuanError(message='Invalid request'))
continue
line = line[:-1] # remove the trailing newline
self.logger.info('C: {}'.format(line))
request = _common.Request()
try:
request.from_bytes(line)
except _error.AssuanError as e:
self.send_error_response(e)
continue
self.handle_request(request)
def handle_request(self, request):
try:
handle = getattr(
self, '_handle_{}'.format(request.command))
except AttributeError:
self.logger.warn('unknown command: {}'.format(request.command))
self.send_error_response(
_error.AssuanError(message='Unknown command'))
return
try:
responses = handle(request.parameters)
for response in responses:
self.send_response(response)
except _error.AssuanError as error:
self.send_error_response(error)
return
except Exception as e:
self.logger.error(
'exception while executing {}:\n{}'.format(
handle, _traceback.format_exc().rstrip()))
self.send_error_response(
_error.AssuanError(message='Unspecific Assuan server fault'))
return
def send_response(self, response):
"""For internal use by ``.handle_requests()``
"""
rstring = str(response)
self.logger.info('S: {}'.format(response))
self.output.write(bytes(response))
self.output.write(b'\n')
try:
self.output.flush()
except IOError:
if not self.stop:
raise
def send_error_response(self, error):
"""For internal use by ``.handle_requests()``
"""
self.send_response(_common.error_response(error))
# common commands defined at
# http://www.gnupg.org/documentation/manuals/assuan/Client-requests.html
def _handle_BYE(self, arg):
if self.single_request:
self.stop = True
yield _common.Response('OK', 'closing connection')
def _handle_RESET(self, arg):
self.reset()
def _handle_END(self, arg):
raise _error.AssuanError(
code=175, message='Unknown command (reserved)')
def _handle_HELP(self, arg):
raise _error.AssuanError(
code=175, message='Unknown command (reserved)')
def _handle_QUIT(self, arg):
if self.listen_to_quit:
self.stop = True
yield _common.Response('OK', 'stopping the server')
raise _error.AssuanError(
code=175, message='Unknown command (reserved)')
def _handle_OPTION(self, arg):
"""
>>> s = AssuanServer(name='test', valid_options=['my-op'])
>>> list(s._handle_OPTION('my-op = 1 ')) # doctest: +ELLIPSIS
[<pyassuan.common.Response object at ...>]
>>> s.options
{'my-op': '1'}
>>> list(s._handle_OPTION('my-op 2')) # doctest: +ELLIPSIS
[<pyassuan.common.Response object at ...>]
>>> s.options
{'my-op': '2'}
>>> list(s._handle_OPTION('--my-op 3')) # doctest: +ELLIPSIS
[<pyassuan.common.Response object at ...>]
>>> s.options
{'my-op': '3'}
>>> list(s._handle_OPTION('my-op')) # doctest: +ELLIPSIS
[<pyassuan.common.Response object at ...>]
>>> s.options
{'my-op': None}
>>> list(s._handle_OPTION('inv'))
Traceback (most recent call last):
...
pyassuan.error.AssuanError: 174 Unknown option
>>> list(s._handle_OPTION('in|valid'))
Traceback (most recent call last):
...
pyassuan.error.AssuanError: 90 Invalid parameter
"""
match = _OPTION_REGEXP.match(arg)
if not match:
raise _error.AssuanError(message='Invalid parameter')
name,space,equal,value = match.groups()
if value and not space and not equal:
# need either space or equal to separate value
raise _error.AssuanError(message='Invalid parameter')
if name not in self.valid_options:
if self.strict_options:
raise _error.AssuanError(message='Unknown option')
else:
self.logger.info('skipping invalid option: {}'.format(name))
else:
if not value:
value = None
self.options[name] = value
yield _common.Response('OK')
def _handle_CANCEL(self, arg):
raise _error.AssuanError(
code=175, message='Unknown command (reserved)')
def _handle_AUTH(self, arg):
raise _error.AssuanError(
code=175, message='Unknown command (reserved)')
class AssuanSocketServer (object):
"""A threaded server spawning ``AssuanServer``\s for each connection
"""
def __init__(self, name, socket, server, kwargs={}, max_threads=10,
logger=_LOG, use_sublogger=True):
self.name = name
if use_sublogger:
logger = _logging.getLogger('{}.{}'.format(logger.name, self.name))
self.logger = logger
self.socket = socket
self.server = server
assert 'name' not in kwargs, kwargs['name']
assert 'logger' not in kwargs, kwargs['logger']
kwargs['logger'] = self.logger
assert 'use_sublogger' not in kwargs, kwargs['use_sublogger']
kwargs['use_sublogger'] = True
if 'close_on_disconnect' in kwargs:
assert kwargs['close_on_disconnect'] == True, (
kwargs['close_on_disconnect'])
else:
kwargs['close_on_disconnect'] = True
self.kwargs = kwargs
self.max_threads = max_threads
self.threads = []
def run(self):
self.logger.info('listen on socket')
self.socket.listen()
thread_index = 0
while True:
socket,address = self.socket.accept()
self.logger.info('connection from {}'.format(address))
self.cleanup_threads()
if len(threads) > self.max_threads:
self.drop_connection(socket, address)
self.spawn_thread(
'server-thread-{}'.format(thread_index), socket, address)
thread_index = (thread_index + 1) % self.max_threads
def cleanup_threads(self):
i = 0
while i < len(self.threads):
thread = self.threads[i]
thread.join(0)
if thread.is_alive():
self.logger.info('joined thread {}'.format(thread.name))
self.threads.pop(i)
thread.socket.shutdown()
thread.socket.close()
else:
i += 1
def drop_connection(self, socket, address):
self.logger.info('drop connection from {}'.format(address))
# TODO: proper error to send to the client?
def spawn_thread(self, name, socket, address):
server = self.server(name=name, **self.kwargs)
server.input = socket.makefile('rb')
server.output = socket.makefile('wb')
thread = _threading.Thread(target=server.run, name=name)
thread.start()
self.threads.append(thread)

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# Copyright (C) 2012-2018 W. Trevor King <wking@tremily.us>
#
# This file is part of pyassuan.
#
# pyassuan 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 3 of the License, or (at your option) any later
# version.
#
# pyassuan 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
# pyassuan. If not, see <http://www.gnu.org/licenses/>.
import doctest
import unittest
from . import common
def load_tests(loader, tests, ignore):
tests.addTests(doctest.DocTestSuite(common))
return tests

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# Copyright (C) 2012-2018 W. Trevor King <wking@tremily.us>
#
# This file is part of pyassuan.
#
# pyassuan 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 3 of the License, or (at your option) any later
# version.
#
# pyassuan 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
# pyassuan. If not, see <http://www.gnu.org/licenses/>.
import doctest
import unittest
from . import error
def load_tests(loader, tests, ignore):
tests.addTests(doctest.DocTestSuite(error))
return tests

25
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# Copyright (C) 2012-2018 W. Trevor King <wking@tremily.us>
#
# This file is part of pyassuan.
#
# pyassuan 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 3 of the License, or (at your option) any later
# version.
#
# pyassuan 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
# pyassuan. If not, see <http://www.gnu.org/licenses/>.
import doctest
import unittest
from . import server
def load_tests(loader, tests, ignore):
tests.addTests(doctest.DocTestSuite(server))
return tests

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# Copyright (C) 2012-2018 W. Trevor King <wking@tremily.us>
#
# This file is part of pyassuan.
#
# pyassuan 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 3 of the License, or (at your option) any later
# version.
#
# pyassuan 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
# pyassuan. If not, see <http://www.gnu.org/licenses/>.
"Python module and tools for communicating in the Assuan protocol."
from distutils.core import setup as _setup
import os.path as _os_path
from pyassuan import __version__
_this_dir = _os_path.dirname(__file__)
_setup(
name='pyassuan',
version=__version__,
maintainer='W. Trevor King',
maintainer_email='wking@tremily.us',
url='http://blog.tremily.us/posts/pyassuan/',
download_url='http://git.tremily.us/?p=pyassuan.git;a=snapshot;h=v{};sf=tgz'.format(__version__),
license = 'GNU General Public License (GPL)',
platforms = ['all'],
description = __doc__,
long_description=open(_os_path.join(_this_dir, 'README'), 'r').read(),
classifiers = [
'Development Status :: 3 - Alpha',
'Intended Audience :: Developers',
'Operating System :: OS Independent',
'License :: OSI Approved :: GNU General Public License (GPL)',
'Programming Language :: Python :: 3',
'Programming Language :: Python :: 3.3',
'Programming Language :: Python :: 3.4',
'Programming Language :: Python :: 3.5',
'Programming Language :: Python :: 3.6',
'Topic :: Security :: Cryptography',
'Topic :: Software Development'
],
scripts = ['bin/get-info.py', 'bin/pinentry.py'],
packages = ['pyassuan'],
provides = ['pyassuan'],
)