← Back to branch summary

~bzr-pqm/bzr/bzr.dev

« back to all changes in this revision

Viewing changes to bzrlib/gpg.py

  • Committer: Martin Pool
  • Date: 2005-05-05 06:24:20 UTC
  • Revision ID: mbp@sourcefrog.net-20050505062420-7c579c756f1a1d9e
- Import stat-cache code

Show diffs side-by-side

added added

removed removed

Lines of Context:
bzrlib/gpg.py
1
 
# Copyright (C) 2005 by Canonical Ltd
2
 
#   Authors: Robert Collins <robert.collins@canonical.com>
3
 
#
4
 
# This program is free software; you can redistribute it and/or modify
5
 
# it under the terms of the GNU General Public License as published by
6
 
# the Free Software Foundation; either version 2 of the License, or
7
 
# (at your option) any later version.
8
 
#
9
 
# This program is distributed in the hope that it will be useful,
10
 
# but WITHOUT ANY WARRANTY; without even the implied warranty of
11
 
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12
 
# GNU General Public License for more details.
13
 
#
14
 
# You should have received a copy of the GNU General Public License
15
 
# along with this program; if not, write to the Free Software
16
 
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
17
 
 
18
 
"""GPG signing and checking logic."""
19
 
 
20
 
import errno
21
 
import subprocess
22
 
 
23
 
import bzrlib.errors as errors
24
 
 
25
 
class DisabledGPGStrategy(object):
26
 
    """A GPG Strategy that makes everything fail."""
27
 
 
28
 
    def __init__(self, ignored):
29
 
        """Real strategies take a configuration."""
30
 
 
31
 
    def sign(self, content):
32
 
        raise errors.SigningFailed('Signing is disabled.')
33
 
 
34
 
 
35
 
class LoopbackGPGStrategy(object):
36
 
    """A GPG Strategy that acts like 'cat' - data is just passed through."""
37
 
 
38
 
    def __init__(self, ignored):
39
 
        """Real strategies take a configuration."""
40
 
 
41
 
    def sign(self, content):
42
 
        return content
43
 
 
44
 
 
45
 
class GPGStrategy(object):
46
 
    """GPG Signing and checking facilities."""
47
 
        
48
 
    def _command_line(self):
49
 
        return [self._config.gpg_signing_command(), '--clearsign']
50
 
 
51
 
    def __init__(self, config):
52
 
        self._config = config
53
 
 
54
 
    def sign(self, content):
55
 
        try:
56
 
            process = subprocess.Popen(self._command_line(),
57
 
                                       stdin=subprocess.PIPE,
58
 
                                       stdout=subprocess.PIPE)
59
 
            try:
60
 
                result = process.communicate(content)[0]
61
 
                if process.returncode is None:
62
 
                    process.wait()
63
 
                if process.returncode != 0:
64
 
                    raise errors.SigningFailed(self._command_line())
65
 
                return result
66
 
            except OSError, e:
67
 
                if e.errno == errno.EPIPE:
68
 
                    raise errors.SigningFailed(self._command_line())
69
 
                else:
70
 
                    raise
71
 
        except ValueError:
72
 
            # bad subprocess parameters, should never happen.
73
 
            raise
74
 
        except OSError, e:
75
 
            if e.errno == errno.ENOENT:
76
 
                # gpg is not installed
77
 
                raise errors.SigningFailed(self._command_line())
78
 
            else:
79
 
                raise