gpgme/lang/python/src/__init__.py

# Copyright (C) 2016 g10 Code GmbH
# Copyright (C) 2004 Igor Belyi <belyi@users.sourceforge.net>
# Copyright (C) 2002 John Goerzen <jgoerzen@complete.org>
#
# 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
"""gpg: GnuPG Interface for Python (GPGME bindings)

Welcome to gpg, the GnuPG Interface for Python.

The latest release of this package may be obtained from
https://www.gnupg.org

FEATURES
--------

 * Feature-rich, full implementation of the GPGME library.  Supports
   all GPGME features.  Callback functions may be written in pure
   Python.  Exceptions raised in callbacks are properly propagated.

 * Ability to sign, encrypt, decrypt, and verify data.

 * Ability to list keys, export and import keys, and manage the keyring.

 * Fully object-oriented with convenient classes and modules.

QUICK EXAMPLE
-------------

    >>> import gpg
    >>> with gpg.Context() as c:
    >>> with gpg.Context() as c:
    ...     cipher, _, _ = c.encrypt("Hello world :)".encode(),
    ...                              passphrase="abc")
    ...     c.decrypt(cipher, passphrase="abc")
    ...
    (b'Hello world :)',
     <gpg.results.DecryptResult object at 0x7f5ab8121080>,
     <gpg.results.VerifyResult object at 0x7f5ab81219b0>)

GENERAL OVERVIEW
----------------

For those of you familiar with GPGME, you will be right at home here.

The python gpg module is, for the most part, a direct interface to the C GPGME
library.  However, it is re-packaged in a more Pythonic way --
object-oriented with classes and modules.  Take a look at the classes
defined here -- they correspond directly to certain object types in GPGME
for C.  For instance, the following C code:

gpgme_ctx_t context;
gpgme_new(&context);
...
gpgme_op_encrypt(context, recp, 1, plain, cipher);

Translates into the following Python code:

context = core.Context()
...
context.op_encrypt(recp, 1, plain, cipher)

The Python module automatically does error-checking and raises Python
exception gpg.errors.GPGMEError when GPGME signals an error. getcode()
and getsource() of this exception return code and source of the error.

IMPORTANT NOTE
--------------
This documentation only covers a small subset of available GPGME functions and
methods.  Please consult the documentation for the C library
for comprehensive coverage.

This library uses Python's reflection to automatically detect the methods
that are available for each class, and as such, most of those methods
do not appear explicitly anywhere. You can use dir() python built-in command
on an object to see what methods and fields it has but their meaning can
be found only in GPGME documentation.

FOR MORE INFORMATION
--------------------
GnuPG homepage: https://www.gnupg.org/
GPGME documentation: https://www.gnupg.org/documentation/manuals/gpgme/

"""

from __future__ import absolute_import, print_function, unicode_literals
del absolute_import, print_function, unicode_literals

from . import core
from . import errors
from . import constants
from . import util
from . import callbacks
from . import version
from .core import Context
from .core import Data

# Interface hygiene.

# Drop the low-level gpgme that creeps in for some reason.
gpgme = None
del gpgme

# This is a white-list of symbols.  Any other will alert pyflakes.
_ = [Context, Data, core, errors, constants, util, callbacks, version]
del _

__all__ = [
    "Context", "Data", "core", "errors", "constants", "util", "callbacks",
    "version"
]