From d1955bd267a132c24d9e64dde7a1cdb8bd9fe9c5 Mon Sep 17 00:00:00 2001
From: Kali Kaneko <kali@futeisha.org>
Date: Wed, 2 Jul 2014 11:38:15 -0500
Subject: Imported Upstream version 1.2.6

---
 gnupg/_trust.py | 103 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 gnupg/_trust.py

(limited to 'gnupg/_trust.py')

diff --git a/gnupg/_trust.py b/gnupg/_trust.py
new file mode 100644
index 0000000..514ae8c
--- /dev/null
+++ b/gnupg/_trust.py
@@ -0,0 +1,103 @@
+# -*- coding: utf-8 -*-
+#
+# This file is part of python-gnupg, a Python interface to GnuPG.
+# Copyright © 2013 Isis Lovecruft, <isis@leap.se> 0xA3ADB67A2CDB8B35
+#           © 2013 Andrej B.
+#           © 2013 LEAP Encryption Access Project
+#           © 2008-2012 Vinay Sajip
+#           © 2005 Steve Traugott
+#           © 2004 A.M. Kuchling
+#
+# 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 3 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 included LICENSE file for details.
+
+'''Functions for handling trustdb and trust calculations.
+
+The functions within this module take an instance of :class:`gnupg.GPGBase` or
+a suitable subclass as their first argument.
+'''
+
+from __future__ import absolute_import
+
+import os
+
+from .      import _util
+from ._util import log
+
+def _create_trustdb(cls):
+    """Create the trustdb file in our homedir, if it doesn't exist."""
+    trustdb = os.path.join(cls.homedir, 'trustdb.gpg')
+    if not os.path.isfile(trustdb):
+        log.info("GnuPG complained that your trustdb file was missing. %s"
+                 % "This is likely due to changing to a new homedir.")
+        log.info("Creating trustdb.gpg file in your GnuPG homedir.")
+        cls.fix_trustdb(trustdb)
+
+def export_ownertrust(cls, trustdb=None):
+    """Export ownertrust to a trustdb file.
+
+    If there is already a file named :file:`trustdb.gpg` in the current GnuPG
+    homedir, it will be renamed to :file:`trustdb.gpg.bak`.
+
+    :param string trustdb: The path to the trustdb.gpg file. If not given,
+                           defaults to ``'trustdb.gpg'`` in the current GnuPG
+                           homedir.
+    """
+    if trustdb is None:
+        trustdb = os.path.join(cls.homedir, 'trustdb.gpg')
+
+    try:
+        os.rename(trustdb, trustdb + '.bak')
+    except (OSError, IOError) as err:
+        log.debug(str(err))
+
+    export_proc = cls._open_subprocess('--export-ownertrust')
+    tdb = open(trustdb, 'wb')
+    _util._threaded_copy_data(export_proc.stdout, tdb)
+
+def import_ownertrust(self, trustdb=None):
+    """Import ownertrust from a trustdb file.
+
+    :param str trustdb: The path to the trustdb.gpg file. If not given,
+                        defaults to :file:`trustdb.gpg` in the current GnuPG
+                        homedir.
+    """
+    if trustdb is None:
+        trustdb = os.path.join(cls.homedir, 'trustdb.gpg')
+
+    import_proc = cls._open_subprocess('--import-ownertrust')
+    tdb = open(trustdb, 'rb')
+    _util._threaded_copy_data(tdb, import_proc.stdin)
+
+def fix_trustdb(cls, trustdb=None):
+    """Attempt to repair a broken trustdb.gpg file.
+
+    GnuPG>=2.0.x has this magical-seeming flag: `--fix-trustdb`. You'd think
+    it would fix the the trustdb. Hah! It doesn't. Here's what it does
+    instead::
+
+      (gpg)~/code/python-gnupg $ gpg2 --fix-trustdb
+      gpg: You may try to re-create the trustdb using the commands:
+      gpg:   cd ~/.gnupg
+      gpg:   gpg2 --export-ownertrust > otrust.tmp
+      gpg:   rm trustdb.gpg
+      gpg:   gpg2 --import-ownertrust < otrust.tmp
+      gpg: If that does not work, please consult the manual
+
+    Brilliant piece of software engineering right there.
+
+    :param str trustdb: The path to the trustdb.gpg file. If not given,
+                        defaults to :file:`trustdb.gpg` in the current GnuPG
+                        homedir.
+    """
+    if trustdb is None:
+        trustdb = os.path.join(cls.homedir, 'trustdb.gpg')
+    export_proc = cls._open_subprocess('--export-ownertrust')
+    import_proc = cls._open_subprocess('--import-ownertrust')
+    _util._threaded_copy_data(export_proc.stdout, import_proc.stdin)
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