1124 lines
38 KiB
Python
1124 lines
38 KiB
Python
""" A wrapper for the 'gpg' command::
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Portions of this module are derived from A.M. Kuchling's well-designed
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GPG.py, using Richard Jones' updated version 1.3, which can be found
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in the pycrypto CVS repository on Sourceforge:
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http://pycrypto.cvs.sourceforge.net/viewvc/pycrypto/gpg/GPG.py
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This module is *not* forward-compatible with amk's; some of the
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old interface has changed. For instance, since I've added decrypt
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functionality, I elected to initialize with a 'gnupghome' argument
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instead of 'keyring', so that gpg can find both the public and secret
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keyrings. I've also altered some of the returned objects in order for
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the caller to not have to know as much about the internals of the
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result classes.
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While the rest of ISconf is released under the GPL, I am releasing
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this single file under the same terms that A.M. Kuchling used for
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pycrypto.
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Steve Traugott, stevegt@terraluna.org
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Thu Jun 23 21:27:20 PDT 2005
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This version of the module has been modified from Steve Traugott's version
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(see http://trac.t7a.org/isconf/browser/trunk/lib/python/isconf/GPG.py) by
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Vinay Sajip to make use of the subprocess module (Steve's version uses os.fork()
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and so does not work on Windows). Renamed to gnupg.py to avoid confusion with
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the previous versions.
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Modifications Copyright (C) 2008-2013 Vinay Sajip. All rights reserved.
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A unittest harness (test_gnupg.py) has also been added.
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"""
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import locale
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__version__ = "0.3.4"
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__author__ = "Vinay Sajip"
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__date__ = "$05-Jun-2013 09:48:54$"
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try:
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from io import StringIO
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except ImportError:
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from cStringIO import StringIO
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import codecs
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import locale
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import logging
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import os
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import re
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import socket
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from subprocess import Popen
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from subprocess import PIPE
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import sys
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import threading
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try:
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import logging.NullHandler as NullHandler
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except ImportError:
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class NullHandler(logging.Handler):
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def handle(self, record):
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pass
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try:
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unicode
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_py3k = False
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string_types = basestring
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text_type = unicode
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except NameError:
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_py3k = True
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string_types = str
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text_type = str
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logger = logging.getLogger('gajim.c.gnupg')
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if not logger.handlers:
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logger.addHandler(NullHandler())
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def _copy_data(instream, outstream):
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# Copy one stream to another
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sent = 0
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if hasattr(sys.stdin, 'encoding'):
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enc = sys.stdin.encoding
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else:
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enc = 'ascii'
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while True:
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data = instream.read(1024)
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if not data:
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break
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sent += len(data)
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logger.debug("sending chunk (%d): %r", sent, data[:256])
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try:
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outstream.write(data)
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except UnicodeError:
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outstream.write(data.encode(enc))
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except:
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# Can sometimes get 'broken pipe' errors even when the data has all
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# been sent
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logger.exception('Error sending data')
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break
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try:
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outstream.close()
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except IOError:
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logger.warning('Exception occurred while closing: ignored', exc_info=1)
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logger.debug("closed output, %d bytes sent", sent)
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def _threaded_copy_data(instream, outstream):
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wr = threading.Thread(target=_copy_data, args=(instream, outstream))
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wr.setDaemon(True)
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logger.debug('data copier: %r, %r, %r', wr, instream, outstream)
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wr.start()
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return wr
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def _write_passphrase(stream, passphrase, encoding):
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passphrase = '%s\n' % passphrase
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passphrase = passphrase.encode(encoding)
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stream.write(passphrase)
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logger.debug("Wrote passphrase: %r", passphrase)
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def _is_sequence(instance):
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return isinstance(instance, (list, tuple, set, frozenset))
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def _make_binary_stream(s, encoding):
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if _py3k:
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if isinstance(s, str):
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s = s.encode(encoding)
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else:
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if type(s) is not str:
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s = s.encode(encoding)
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try:
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from io import BytesIO
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rv = BytesIO(s)
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except ImportError:
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rv = StringIO(s)
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return rv
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class Verify(object):
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"Handle status messages for --verify"
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TRUST_UNDEFINED = 0
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TRUST_NEVER = 1
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TRUST_MARGINAL = 2
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TRUST_FULLY = 3
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TRUST_ULTIMATE = 4
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TRUST_LEVELS = {
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"TRUST_UNDEFINED" : TRUST_UNDEFINED,
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"TRUST_NEVER" : TRUST_NEVER,
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"TRUST_MARGINAL" : TRUST_MARGINAL,
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"TRUST_FULLY" : TRUST_FULLY,
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"TRUST_ULTIMATE" : TRUST_ULTIMATE,
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}
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def __init__(self, gpg):
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self.gpg = gpg
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self.valid = False
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self.fingerprint = self.creation_date = self.timestamp = None
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self.signature_id = self.key_id = None
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self.username = None
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self.key_status = None
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self.status = None
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self.pubkey_fingerprint = None
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self.expire_timestamp = None
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self.sig_timestamp = None
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self.trust_text = None
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self.trust_level = None
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def __nonzero__(self):
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return self.valid
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__bool__ = __nonzero__
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def handle_status(self, key, value):
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if key in self.TRUST_LEVELS:
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self.trust_text = key
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self.trust_level = self.TRUST_LEVELS[key]
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elif key in ("RSA_OR_IDEA", "NODATA", "IMPORT_RES", "PLAINTEXT",
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"PLAINTEXT_LENGTH", "POLICY_URL", "DECRYPTION_INFO",
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"DECRYPTION_OKAY", "INV_SGNR", "FILE_START", "FILE_ERROR",
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"FILE_DONE", "PKA_TRUST_GOOD", "PKA_TRUST_BAD", "BADMDC",
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"GOODMDC", "NO_SGNR", "NOTATION_NAME", "NOTATION_DATA"):
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pass
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elif key == "BADSIG":
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self.valid = False
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self.status = 'signature bad'
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self.key_id, self.username = value.split(None, 1)
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elif key == "ERRSIG":
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self.valid = False
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(self.key_id,
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algo, hash_algo,
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cls,
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self.timestamp) = value.split()[:5]
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self.status = 'signature error'
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elif key == "EXPSIG":
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self.valid = False
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self.status = 'signature expired'
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self.key_id, self.username = value.split(None, 1)
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elif key == "GOODSIG":
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self.valid = True
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self.status = 'signature good'
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self.key_id, self.username = value.split(None, 1)
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elif key == "VALIDSIG":
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(self.fingerprint,
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self.creation_date,
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self.sig_timestamp,
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self.expire_timestamp) = value.split()[:4]
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# may be different if signature is made with a subkey
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self.pubkey_fingerprint = value.split()[-1]
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self.status = 'signature valid'
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elif key == "SIG_ID":
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(self.signature_id,
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self.creation_date, self.timestamp) = value.split()
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elif key == "DECRYPTION_FAILED":
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self.valid = False
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self.key_id = value
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self.status = 'decryption failed'
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elif key == "NO_PUBKEY":
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self.valid = False
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self.key_id = value
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self.status = 'no public key'
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elif key in ("KEYEXPIRED", "SIGEXPIRED", "KEYREVOKED"):
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# these are useless in verify, since they are spit out for any
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# pub/subkeys on the key, not just the one doing the signing.
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# if we want to check for signatures with expired key,
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# the relevant flag is EXPKEYSIG or REVKEYSIG.
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pass
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elif key in ("EXPKEYSIG", "REVKEYSIG"):
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# signed with expired or revoked key
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self.valid = False
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self.key_id = value.split()[0]
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if key == "EXPKEYSIG":
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self.key_status = 'signing key has expired'
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else:
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self.key_status = 'signing key was revoked'
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self.status = self.key_status
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else:
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raise ValueError("Unknown status message: %r" % key)
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class ImportResult(object):
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"Handle status messages for --import"
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counts = '''count no_user_id imported imported_rsa unchanged
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n_uids n_subk n_sigs n_revoc sec_read sec_imported
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sec_dups not_imported'''.split()
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def __init__(self, gpg):
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self.gpg = gpg
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self.imported = []
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self.results = []
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self.fingerprints = []
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for result in self.counts:
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setattr(self, result, None)
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def __nonzero__(self):
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if self.not_imported: return False
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if not self.fingerprints: return False
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return True
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__bool__ = __nonzero__
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ok_reason = {
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'0': 'Not actually changed',
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'1': 'Entirely new key',
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'2': 'New user IDs',
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'4': 'New signatures',
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'8': 'New subkeys',
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'16': 'Contains private key',
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}
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problem_reason = {
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'0': 'No specific reason given',
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'1': 'Invalid Certificate',
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'2': 'Issuer Certificate missing',
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'3': 'Certificate Chain too long',
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'4': 'Error storing certificate',
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}
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def handle_status(self, key, value):
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if key == "IMPORTED":
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# this duplicates info we already see in import_ok & import_problem
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pass
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elif key == "NODATA":
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self.results.append({'fingerprint': None,
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'problem': '0', 'text': 'No valid data found'})
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elif key == "IMPORT_OK":
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reason, fingerprint = value.split()
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reasons = []
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for code, text in list(self.ok_reason.items()):
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if int(reason) | int(code) == int(reason):
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reasons.append(text)
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reasontext = '\n'.join(reasons) + "\n"
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self.results.append({'fingerprint': fingerprint,
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'ok': reason, 'text': reasontext})
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self.fingerprints.append(fingerprint)
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elif key == "IMPORT_PROBLEM":
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try:
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reason, fingerprint = value.split()
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except:
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reason = value
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fingerprint = '<unknown>'
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self.results.append({'fingerprint': fingerprint,
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'problem': reason, 'text': self.problem_reason[reason]})
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elif key == "IMPORT_RES":
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import_res = value.split()
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for i in range(len(self.counts)):
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setattr(self, self.counts[i], int(import_res[i]))
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elif key == "KEYEXPIRED":
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self.results.append({'fingerprint': None,
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'problem': '0', 'text': 'Key expired'})
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elif key == "SIGEXPIRED":
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self.results.append({'fingerprint': None,
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'problem': '0', 'text': 'Signature expired'})
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else:
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raise ValueError("Unknown status message: %r" % key)
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def summary(self):
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l = []
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l.append('%d imported' % self.imported)
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if self.not_imported:
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l.append('%d not imported' % self.not_imported)
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return ', '.join(l)
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ESCAPE_PATTERN = re.compile(r'\\x([0-9a-f][0-9a-f])', re.I)
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BASIC_ESCAPES = {
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r'\n': '\n',
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r'\r': '\r',
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r'\f': '\f',
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r'\v': '\v',
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r'\b': '\b',
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r'\0': '\0',
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}
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class ListKeys(list):
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''' Handle status messages for --list-keys.
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Handle pub and uid (relating the latter to the former).
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Don't care about (info from src/DETAILS):
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crt = X.509 certificate
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crs = X.509 certificate and private key available
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ssb = secret subkey (secondary key)
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uat = user attribute (same as user id except for field 10).
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sig = signature
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rev = revocation signature
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pkd = public key data (special field format, see below)
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grp = reserved for gpgsm
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rvk = revocation key
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'''
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def __init__(self, gpg):
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self.gpg = gpg
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self.curkey = None
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self.fingerprints = []
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self.uids = []
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def key(self, args):
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vars = ("""
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type trust length algo keyid date expires dummy ownertrust uid
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""").split()
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self.curkey = {}
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for i in range(len(vars)):
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self.curkey[vars[i]] = args[i]
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self.curkey['uids'] = []
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if self.curkey['uid']:
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self.curkey['uids'].append(self.curkey['uid'])
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del self.curkey['uid']
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self.curkey['subkeys'] = []
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self.append(self.curkey)
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pub = sec = key
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def fpr(self, args):
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self.curkey['fingerprint'] = args[9]
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self.fingerprints.append(args[9])
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def uid(self, args):
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uid = args[9]
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uid = ESCAPE_PATTERN.sub(lambda m: chr(int(m.group(1), 16)), uid)
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for k, v in BASIC_ESCAPES.items():
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uid = uid.replace(k, v)
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self.curkey['uids'].append(uid)
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self.uids.append(uid)
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def sub(self, args):
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subkey = [args[4], args[11]]
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self.curkey['subkeys'].append(subkey)
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def handle_status(self, key, value):
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pass
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class Crypt(Verify):
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"Handle status messages for --encrypt and --decrypt"
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def __init__(self, gpg):
|
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Verify.__init__(self, gpg)
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self.data = ''
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self.ok = False
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self.status = ''
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def __nonzero__(self):
|
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if self.ok: return True
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return False
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|
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__bool__ = __nonzero__
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|
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def __str__(self):
|
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return self.data.decode(self.gpg.encoding, self.gpg.decode_errors)
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|
|
def handle_status(self, key, value):
|
|
if key in ("ENC_TO", "USERID_HINT", "GOODMDC", "END_DECRYPTION",
|
|
"BEGIN_SIGNING", "NO_SECKEY", "ERROR", "NODATA",
|
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"CARDCTRL", "BADMDC", "SC_OP_FAILURE", "SC_OP_SUCCESS"):
|
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# in the case of ERROR, this is because a more specific error
|
|
# message will have come first
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pass
|
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elif key in ("NEED_PASSPHRASE", "BAD_PASSPHRASE", "GOOD_PASSPHRASE",
|
|
"MISSING_PASSPHRASE", "DECRYPTION_FAILED",
|
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"KEY_NOT_CREATED"):
|
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self.status = key.replace("_", " ").lower()
|
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elif key == "NEED_PASSPHRASE_SYM":
|
|
self.status = 'need symmetric passphrase'
|
|
elif key == "BEGIN_DECRYPTION":
|
|
self.status = 'decryption incomplete'
|
|
elif key == "BEGIN_ENCRYPTION":
|
|
self.status = 'encryption incomplete'
|
|
elif key == "DECRYPTION_OKAY":
|
|
self.status = 'decryption ok'
|
|
self.ok = True
|
|
elif key == "END_ENCRYPTION":
|
|
self.status = 'encryption ok'
|
|
self.ok = True
|
|
elif key == "INV_RECP":
|
|
self.status = 'invalid recipient'
|
|
elif key == "KEYEXPIRED":
|
|
self.status = 'key expired'
|
|
elif key == "SIG_CREATED":
|
|
self.status = 'sig created'
|
|
elif key == "SIGEXPIRED":
|
|
self.status = 'sig expired'
|
|
else:
|
|
Verify.handle_status(self, key, value)
|
|
|
|
class GenKey(object):
|
|
"Handle status messages for --gen-key"
|
|
def __init__(self, gpg):
|
|
self.gpg = gpg
|
|
self.type = None
|
|
self.fingerprint = None
|
|
|
|
def __nonzero__(self):
|
|
if self.fingerprint: return True
|
|
return False
|
|
|
|
__bool__ = __nonzero__
|
|
|
|
def __str__(self):
|
|
return self.fingerprint or ''
|
|
|
|
def handle_status(self, key, value):
|
|
if key in ("PROGRESS", "GOOD_PASSPHRASE", "NODATA", "KEY_NOT_CREATED"):
|
|
pass
|
|
elif key == "KEY_CREATED":
|
|
(self.type,self.fingerprint) = value.split()
|
|
else:
|
|
raise ValueError("Unknown status message: %r" % key)
|
|
|
|
class DeleteResult(object):
|
|
"Handle status messages for --delete-key and --delete-secret-key"
|
|
def __init__(self, gpg):
|
|
self.gpg = gpg
|
|
self.status = 'ok'
|
|
|
|
def __str__(self):
|
|
return self.status
|
|
|
|
problem_reason = {
|
|
'1': 'No such key',
|
|
'2': 'Must delete secret key first',
|
|
'3': 'Ambiguous specification',
|
|
}
|
|
|
|
def handle_status(self, key, value):
|
|
if key == "DELETE_PROBLEM":
|
|
self.status = self.problem_reason.get(value,
|
|
"Unknown error: %r" % value)
|
|
else:
|
|
raise ValueError("Unknown status message: %r" % key)
|
|
|
|
def __nonzero__(self):
|
|
return self.status == 'ok'
|
|
|
|
__bool__ = __nonzero__
|
|
|
|
|
|
class Sign(object):
|
|
"Handle status messages for --sign"
|
|
def __init__(self, gpg):
|
|
self.gpg = gpg
|
|
self.type = None
|
|
self.hash_algo = None
|
|
self.fingerprint = None
|
|
self.status = ''
|
|
|
|
def __nonzero__(self):
|
|
return self.fingerprint is not None
|
|
|
|
__bool__ = __nonzero__
|
|
|
|
def __str__(self):
|
|
return self.data.decode(self.gpg.encoding, self.gpg.decode_errors)
|
|
|
|
def handle_status(self, key, value):
|
|
if key in ("USERID_HINT", "NEED_PASSPHRASE", "BAD_PASSPHRASE",
|
|
"GOOD_PASSPHRASE", "BEGIN_SIGNING", "CARDCTRL", "INV_SGNR",
|
|
"KEYREVOKED", "NO_SGNR", "MISSING_PASSPHRASE",
|
|
"SC_OP_FAILURE", "SC_OP_SUCCESS"):
|
|
pass
|
|
elif key in ("KEYEXPIRED", "SIGEXPIRED"):
|
|
self.status = 'key expired'
|
|
elif key == "SIG_CREATED":
|
|
(self.type,
|
|
algo, self.hash_algo, cls,
|
|
self.timestamp, self.fingerprint
|
|
) = value.split()
|
|
else:
|
|
raise ValueError("Unknown status message: %r" % key)
|
|
|
|
VERSION_RE = re.compile(r'gpg \(GnuPG\) (\d+(\.\d+)*)'.encode('utf-8'), re.I)
|
|
|
|
class GPG(object):
|
|
|
|
decode_errors = 'strict'
|
|
|
|
result_map = {
|
|
'crypt': Crypt,
|
|
'delete': DeleteResult,
|
|
'generate': GenKey,
|
|
'import': ImportResult,
|
|
'list': ListKeys,
|
|
'sign': Sign,
|
|
'verify': Verify,
|
|
}
|
|
|
|
"Encapsulate access to the gpg executable"
|
|
def __init__(self, gpgbinary='gpg', gnupghome=None, verbose=False,
|
|
use_agent=False, keyring=None, options=None,
|
|
secret_keyring=None):
|
|
"""Initialize a GPG process wrapper. Options are:
|
|
|
|
gpgbinary -- full pathname for GPG binary.
|
|
|
|
gnupghome -- full pathname to where we can find the public and
|
|
private keyrings. Default is whatever gpg defaults to.
|
|
keyring -- name of alternative keyring file to use, or list of such
|
|
keyrings. If specified, the default keyring is not used.
|
|
options =-- a list of additional options to pass to the GPG binary.
|
|
secret_keyring -- name of alternative secret keyring file to use, or
|
|
list of such keyrings.
|
|
"""
|
|
self.gpgbinary = gpgbinary
|
|
self.gnupghome = gnupghome
|
|
if keyring:
|
|
# Allow passing a string or another iterable. Make it uniformly
|
|
# a list of keyring filenames
|
|
if isinstance(keyring, string_types):
|
|
keyring = [keyring]
|
|
self.keyring = keyring
|
|
if secret_keyring:
|
|
# Allow passing a string or another iterable. Make it uniformly
|
|
# a list of keyring filenames
|
|
if isinstance(secret_keyring, string_types):
|
|
secret_keyring = [secret_keyring]
|
|
self.secret_keyring = secret_keyring
|
|
self.verbose = verbose
|
|
self.use_agent = use_agent
|
|
if isinstance(options, str):
|
|
options = [options]
|
|
self.options = options
|
|
self.encoding = locale.getpreferredencoding()
|
|
if self.encoding is None: # This happens on Jython!
|
|
self.encoding = sys.stdin.encoding
|
|
if gnupghome and not os.path.isdir(self.gnupghome):
|
|
os.makedirs(self.gnupghome,0x1C0)
|
|
p = self._open_subprocess(["--version"])
|
|
result = self.result_map['verify'](self) # any result will do for this
|
|
self._collect_output(p, result, stdin=p.stdin)
|
|
if p.returncode != 0:
|
|
raise ValueError("Error invoking gpg: %s: %s" % (p.returncode,
|
|
result.stderr))
|
|
m = VERSION_RE.match(result.data)
|
|
if not m:
|
|
self.version = None
|
|
else:
|
|
dot = '.'.encode('utf-8')
|
|
self.version = tuple([int(s) for s in m.groups()[0].split(dot)])
|
|
|
|
def make_args(self, args, passphrase):
|
|
"""
|
|
Make a list of command line elements for GPG. The value of ``args``
|
|
will be appended. The ``passphrase`` argument needs to be True if
|
|
a passphrase will be sent to GPG, else False.
|
|
"""
|
|
cmd = [self.gpgbinary, '--status-fd 2 --no-tty']
|
|
if self.gnupghome:
|
|
cmd.append('--homedir "%s"' % self.gnupghome)
|
|
if self.keyring:
|
|
cmd.append('--no-default-keyring')
|
|
for fn in self.keyring:
|
|
cmd.append('--keyring "%s"' % fn)
|
|
if self.secret_keyring:
|
|
for fn in self.secret_keyring:
|
|
cmd.append('--secret-keyring "%s"' % fn)
|
|
if passphrase:
|
|
cmd.append('--batch --passphrase-fd 0')
|
|
if self.use_agent:
|
|
cmd.append('--use-agent')
|
|
if self.options:
|
|
cmd.extend(self.options)
|
|
cmd.extend(args)
|
|
return cmd
|
|
|
|
def _open_subprocess(self, args, passphrase=False):
|
|
# Internal method: open a pipe to a GPG subprocess and return
|
|
# the file objects for communicating with it.
|
|
cmd = ' '.join(self.make_args(args, passphrase))
|
|
if self.verbose:
|
|
print(cmd)
|
|
logger.debug("%s", cmd)
|
|
return Popen(cmd, shell=True, stdin=PIPE, stdout=PIPE, stderr=PIPE)
|
|
|
|
def _read_response(self, stream, result):
|
|
# Internal method: reads all the stderr output from GPG, taking notice
|
|
# only of lines that begin with the magic [GNUPG:] prefix.
|
|
#
|
|
# Calls methods on the response object for each valid token found,
|
|
# with the arg being the remainder of the status line.
|
|
lines = []
|
|
while True:
|
|
line = stream.readline()
|
|
if len(line) == 0:
|
|
break
|
|
lines.append(line)
|
|
line = line.rstrip()
|
|
if self.verbose:
|
|
print(line)
|
|
logger.debug("%s", line)
|
|
if line[0:9] == '[GNUPG:] ':
|
|
# Chop off the prefix
|
|
line = line[9:]
|
|
L = line.split(None, 1)
|
|
keyword = L[0]
|
|
if len(L) > 1:
|
|
value = L[1]
|
|
else:
|
|
value = ""
|
|
result.handle_status(keyword, value)
|
|
result.stderr = ''.join(lines)
|
|
|
|
def _read_data(self, stream, result):
|
|
# Read the contents of the file from GPG's stdout
|
|
chunks = []
|
|
while True:
|
|
data = stream.read(1024)
|
|
if len(data) == 0:
|
|
break
|
|
logger.debug("chunk: %r" % data[:256])
|
|
chunks.append(data)
|
|
if _py3k:
|
|
# Join using b'' or '', as appropriate
|
|
result.data = type(data)().join(chunks)
|
|
else:
|
|
result.data = ''.join(chunks)
|
|
|
|
def _collect_output(self, process, result, writer=None, stdin=None):
|
|
"""
|
|
Drain the subprocesses output streams, writing the collected output
|
|
to the result. If a writer thread (writing to the subprocess) is given,
|
|
make sure it's joined before returning. If a stdin stream is given,
|
|
close it before returning.
|
|
"""
|
|
stderr = codecs.getreader(self.encoding)(process.stderr)
|
|
rr = threading.Thread(target=self._read_response, args=(stderr, result))
|
|
rr.setDaemon(True)
|
|
logger.debug('stderr reader: %r', rr)
|
|
rr.start()
|
|
|
|
stdout = process.stdout
|
|
dr = threading.Thread(target=self._read_data, args=(stdout, result))
|
|
dr.setDaemon(True)
|
|
logger.debug('stdout reader: %r', dr)
|
|
dr.start()
|
|
|
|
dr.join()
|
|
rr.join()
|
|
if writer is not None:
|
|
writer.join()
|
|
process.wait()
|
|
if stdin is not None:
|
|
try:
|
|
stdin.close()
|
|
except IOError:
|
|
pass
|
|
stderr.close()
|
|
stdout.close()
|
|
|
|
def _handle_io(self, args, fileobj, result, passphrase=None, binary=False):
|
|
"Handle a call to GPG - pass input data, collect output data"
|
|
# Handle a basic data call - pass data to GPG, handle the output
|
|
# including status information. Garbage In, Garbage Out :)
|
|
p = self._open_subprocess(args, passphrase is not None)
|
|
if not binary:
|
|
stdin = codecs.getwriter(self.encoding)(p.stdin)
|
|
else:
|
|
stdin = p.stdin
|
|
if passphrase:
|
|
_write_passphrase(stdin, passphrase, self.encoding)
|
|
writer = _threaded_copy_data(fileobj, stdin)
|
|
self._collect_output(p, result, writer, stdin)
|
|
return result
|
|
|
|
#
|
|
# SIGNATURE METHODS
|
|
#
|
|
def sign(self, message, **kwargs):
|
|
"""sign message"""
|
|
f = _make_binary_stream(message, self.encoding)
|
|
result = self.sign_file(f, **kwargs)
|
|
f.close()
|
|
return result
|
|
|
|
def sign_file(self, file, keyid=None, passphrase=None, clearsign=True,
|
|
detach=False, binary=False):
|
|
"""sign file"""
|
|
logger.debug("sign_file: %s", file)
|
|
if binary:
|
|
args = ['-s']
|
|
else:
|
|
args = ['-sa']
|
|
# You can't specify detach-sign and clearsign together: gpg ignores
|
|
# the detach-sign in that case.
|
|
if detach:
|
|
args.append("--detach-sign")
|
|
elif clearsign:
|
|
args.append("--clearsign")
|
|
if keyid:
|
|
args.append('--default-key "%s"' % keyid)
|
|
result = self.result_map['sign'](self)
|
|
#We could use _handle_io here except for the fact that if the
|
|
#passphrase is bad, gpg bails and you can't write the message.
|
|
p = self._open_subprocess(args, passphrase is not None)
|
|
try:
|
|
stdin = p.stdin
|
|
if passphrase:
|
|
_write_passphrase(stdin, passphrase, self.encoding)
|
|
writer = _threaded_copy_data(file, stdin)
|
|
except IOError:
|
|
logging.exception("error writing message")
|
|
writer = None
|
|
self._collect_output(p, result, writer, stdin)
|
|
return result
|
|
|
|
def verify(self, data):
|
|
"""Verify the signature on the contents of the string 'data'
|
|
|
|
>>> gpg = GPG(gnupghome="keys")
|
|
>>> input = gpg.gen_key_input(Passphrase='foo')
|
|
>>> key = gpg.gen_key(input)
|
|
>>> assert key
|
|
>>> sig = gpg.sign('hello',keyid=key.fingerprint,passphrase='bar')
|
|
>>> assert not sig
|
|
>>> sig = gpg.sign('hello',keyid=key.fingerprint,passphrase='foo')
|
|
>>> assert sig
|
|
>>> verify = gpg.verify(sig.data)
|
|
>>> assert verify
|
|
|
|
"""
|
|
f = _make_binary_stream(data, self.encoding)
|
|
result = self.verify_file(f)
|
|
f.close()
|
|
return result
|
|
|
|
def verify_file(self, file, data_filename=None):
|
|
"Verify the signature on the contents of the file-like object 'file'"
|
|
logger.debug('verify_file: %r, %r', file, data_filename)
|
|
result = self.result_map['verify'](self)
|
|
args = ['--verify']
|
|
if data_filename is None:
|
|
self._handle_io(args, file, result, binary=True)
|
|
else:
|
|
logger.debug('Handling detached verification')
|
|
import tempfile
|
|
fd, fn = tempfile.mkstemp(prefix='pygpg')
|
|
s = file.read()
|
|
file.close()
|
|
logger.debug('Wrote to temp file: %r', s)
|
|
os.write(fd, s)
|
|
os.close(fd)
|
|
args.append(fn)
|
|
args.append('"%s"' % data_filename)
|
|
try:
|
|
p = self._open_subprocess(args)
|
|
self._collect_output(p, result, stdin=p.stdin)
|
|
finally:
|
|
os.unlink(fn)
|
|
return result
|
|
|
|
#
|
|
# KEY MANAGEMENT
|
|
#
|
|
|
|
def import_keys(self, key_data):
|
|
""" import the key_data into our keyring
|
|
|
|
>>> import shutil
|
|
>>> shutil.rmtree("keys")
|
|
>>> gpg = GPG(gnupghome="keys")
|
|
>>> input = gpg.gen_key_input()
|
|
>>> result = gpg.gen_key(input)
|
|
>>> print1 = result.fingerprint
|
|
>>> result = gpg.gen_key(input)
|
|
>>> print2 = result.fingerprint
|
|
>>> pubkey1 = gpg.export_keys(print1)
|
|
>>> seckey1 = gpg.export_keys(print1,secret=True)
|
|
>>> seckeys = gpg.list_keys(secret=True)
|
|
>>> pubkeys = gpg.list_keys()
|
|
>>> assert print1 in seckeys.fingerprints
|
|
>>> assert print1 in pubkeys.fingerprints
|
|
>>> str(gpg.delete_keys(print1))
|
|
'Must delete secret key first'
|
|
>>> str(gpg.delete_keys(print1,secret=True))
|
|
'ok'
|
|
>>> str(gpg.delete_keys(print1))
|
|
'ok'
|
|
>>> str(gpg.delete_keys("nosuchkey"))
|
|
'No such key'
|
|
>>> seckeys = gpg.list_keys(secret=True)
|
|
>>> pubkeys = gpg.list_keys()
|
|
>>> assert not print1 in seckeys.fingerprints
|
|
>>> assert not print1 in pubkeys.fingerprints
|
|
>>> result = gpg.import_keys('foo')
|
|
>>> assert not result
|
|
>>> result = gpg.import_keys(pubkey1)
|
|
>>> pubkeys = gpg.list_keys()
|
|
>>> seckeys = gpg.list_keys(secret=True)
|
|
>>> assert not print1 in seckeys.fingerprints
|
|
>>> assert print1 in pubkeys.fingerprints
|
|
>>> result = gpg.import_keys(seckey1)
|
|
>>> assert result
|
|
>>> seckeys = gpg.list_keys(secret=True)
|
|
>>> pubkeys = gpg.list_keys()
|
|
>>> assert print1 in seckeys.fingerprints
|
|
>>> assert print1 in pubkeys.fingerprints
|
|
>>> assert print2 in pubkeys.fingerprints
|
|
|
|
"""
|
|
result = self.result_map['import'](self)
|
|
logger.debug('import_keys: %r', key_data[:256])
|
|
data = _make_binary_stream(key_data, self.encoding)
|
|
self._handle_io(['--import'], data, result, binary=True)
|
|
logger.debug('import_keys result: %r', result.__dict__)
|
|
data.close()
|
|
return result
|
|
|
|
def recv_keys(self, keyserver, *keyids):
|
|
"""Import a key from a keyserver
|
|
|
|
The doctest assertion is skipped in Jython because security permissions
|
|
may prevent the recv_keys from succeeding.
|
|
|
|
>>> import shutil
|
|
>>> shutil.rmtree("keys")
|
|
>>> gpg = GPG(gnupghome="keys")
|
|
>>> os.chmod('keys', 0x1C0)
|
|
>>> result = gpg.recv_keys('keyserver.ubuntu.com', '92905378')
|
|
>>> assert result
|
|
|
|
"""
|
|
result = self.result_map['import'](self)
|
|
logger.debug('recv_keys: %r', keyids)
|
|
data = _make_binary_stream("", self.encoding)
|
|
#data = ""
|
|
args = ['--keyserver', keyserver, '--recv-keys']
|
|
args.extend(keyids)
|
|
self._handle_io(args, data, result, binary=True)
|
|
logger.debug('recv_keys result: %r', result.__dict__)
|
|
data.close()
|
|
return result
|
|
|
|
def delete_keys(self, fingerprints, secret=False):
|
|
which='key'
|
|
if secret:
|
|
which='secret-key'
|
|
if _is_sequence(fingerprints):
|
|
fingerprints = ' '.join(fingerprints)
|
|
args = ['--batch --delete-%s "%s"' % (which, fingerprints)]
|
|
result = self.result_map['delete'](self)
|
|
p = self._open_subprocess(args)
|
|
self._collect_output(p, result, stdin=p.stdin)
|
|
return result
|
|
|
|
def export_keys(self, keyids, secret=False):
|
|
"export the indicated keys. 'keyid' is anything gpg accepts"
|
|
which=''
|
|
if secret:
|
|
which='-secret-key'
|
|
if _is_sequence(keyids):
|
|
keyids = ' '.join(['"%s"' % k for k in keyids])
|
|
args = ["--armor --export%s %s" % (which, keyids)]
|
|
p = self._open_subprocess(args)
|
|
# gpg --export produces no status-fd output; stdout will be
|
|
# empty in case of failure
|
|
#stdout, stderr = p.communicate()
|
|
result = self.result_map['delete'](self) # any result will do
|
|
self._collect_output(p, result, stdin=p.stdin)
|
|
logger.debug('export_keys result: %r', result.data)
|
|
return result.data.decode(self.encoding, self.decode_errors)
|
|
|
|
def list_keys(self, secret=False):
|
|
""" list the keys currently in the keyring
|
|
|
|
>>> import shutil
|
|
>>> shutil.rmtree("keys")
|
|
>>> gpg = GPG(gnupghome="keys")
|
|
>>> input = gpg.gen_key_input()
|
|
>>> result = gpg.gen_key(input)
|
|
>>> print1 = result.fingerprint
|
|
>>> result = gpg.gen_key(input)
|
|
>>> print2 = result.fingerprint
|
|
>>> pubkeys = gpg.list_keys()
|
|
>>> assert print1 in pubkeys.fingerprints
|
|
>>> assert print2 in pubkeys.fingerprints
|
|
|
|
"""
|
|
|
|
which='keys'
|
|
if secret:
|
|
which='secret-keys'
|
|
args = "--list-%s --fixed-list-mode --fingerprint --with-colons" % (which,)
|
|
args = [args]
|
|
p = self._open_subprocess(args)
|
|
|
|
# there might be some status thingumy here I should handle... (amk)
|
|
# ...nope, unless you care about expired sigs or keys (stevegt)
|
|
|
|
# Get the response information
|
|
result = self.result_map['list'](self)
|
|
self._collect_output(p, result, stdin=p.stdin)
|
|
lines = result.data.decode(self.encoding,
|
|
self.decode_errors).splitlines()
|
|
valid_keywords = 'pub uid sec fpr sub'.split()
|
|
for line in lines:
|
|
if self.verbose:
|
|
print(line)
|
|
logger.debug("line: %r", line.rstrip())
|
|
if not line:
|
|
break
|
|
L = line.strip().split(':')
|
|
if not L:
|
|
continue
|
|
keyword = L[0]
|
|
if keyword in valid_keywords:
|
|
getattr(result, keyword)(L)
|
|
return result
|
|
|
|
def gen_key(self, input):
|
|
"""Generate a key; you might use gen_key_input() to create the
|
|
control input.
|
|
|
|
>>> gpg = GPG(gnupghome="keys")
|
|
>>> input = gpg.gen_key_input()
|
|
>>> result = gpg.gen_key(input)
|
|
>>> assert result
|
|
>>> result = gpg.gen_key('foo')
|
|
>>> assert not result
|
|
|
|
"""
|
|
args = ["--gen-key --batch"]
|
|
result = self.result_map['generate'](self)
|
|
f = _make_binary_stream(input, self.encoding)
|
|
self._handle_io(args, f, result, binary=True)
|
|
f.close()
|
|
return result
|
|
|
|
def gen_key_input(self, **kwargs):
|
|
"""
|
|
Generate --gen-key input per gpg doc/DETAILS
|
|
"""
|
|
parms = {}
|
|
for key, val in list(kwargs.items()):
|
|
key = key.replace('_','-').title()
|
|
if str(val).strip(): # skip empty strings
|
|
parms[key] = val
|
|
parms.setdefault('Key-Type','RSA')
|
|
parms.setdefault('Key-Length',1024)
|
|
parms.setdefault('Name-Real', "Autogenerated Key")
|
|
parms.setdefault('Name-Comment', "Generated by gnupg.py")
|
|
try:
|
|
logname = os.environ['LOGNAME']
|
|
except KeyError:
|
|
logname = os.environ['USERNAME']
|
|
hostname = socket.gethostname()
|
|
parms.setdefault('Name-Email', "%s@%s" % (logname.replace(' ', '_'),
|
|
hostname))
|
|
out = "Key-Type: %s\n" % parms.pop('Key-Type')
|
|
for key, val in list(parms.items()):
|
|
out += "%s: %s\n" % (key, val)
|
|
out += "%commit\n"
|
|
return out
|
|
|
|
# Key-Type: RSA
|
|
# Key-Length: 1024
|
|
# Name-Real: ISdlink Server on %s
|
|
# Name-Comment: Created by %s
|
|
# Name-Email: isdlink@%s
|
|
# Expire-Date: 0
|
|
# %commit
|
|
#
|
|
#
|
|
# Key-Type: DSA
|
|
# Key-Length: 1024
|
|
# Subkey-Type: ELG-E
|
|
# Subkey-Length: 1024
|
|
# Name-Real: Joe Tester
|
|
# Name-Comment: with stupid passphrase
|
|
# Name-Email: joe@foo.bar
|
|
# Expire-Date: 0
|
|
# Passphrase: abc
|
|
# %pubring foo.pub
|
|
# %secring foo.sec
|
|
# %commit
|
|
|
|
#
|
|
# ENCRYPTION
|
|
#
|
|
def encrypt_file(self, file, recipients, sign=None,
|
|
always_trust=False, passphrase=None,
|
|
armor=True, output=None, symmetric=False):
|
|
"Encrypt the message read from the file-like object 'file'"
|
|
args = ['--encrypt']
|
|
if symmetric:
|
|
args = ['--symmetric']
|
|
else:
|
|
args = ['--encrypt']
|
|
if not _is_sequence(recipients):
|
|
recipients = (recipients,)
|
|
for recipient in recipients:
|
|
args.append('--recipient "%s"' % recipient)
|
|
if armor: # create ascii-armored output - set to False for binary output
|
|
args.append('--armor')
|
|
if output: # write the output to a file with the specified name
|
|
if os.path.exists(output):
|
|
os.remove(output) # to avoid overwrite confirmation message
|
|
args.append('--output "%s"' % output)
|
|
if sign:
|
|
args.append('--sign --default-key "%s"' % sign)
|
|
if always_trust:
|
|
args.append("--always-trust")
|
|
result = self.result_map['crypt'](self)
|
|
self._handle_io(args, file, result, passphrase=passphrase, binary=True)
|
|
logger.debug('encrypt result: %r', result.data)
|
|
return result
|
|
|
|
def encrypt(self, data, recipients, **kwargs):
|
|
"""Encrypt the message contained in the string 'data'
|
|
|
|
>>> import shutil
|
|
>>> if os.path.exists("keys"):
|
|
... shutil.rmtree("keys")
|
|
>>> gpg = GPG(gnupghome="keys")
|
|
>>> input = gpg.gen_key_input(passphrase='foo')
|
|
>>> result = gpg.gen_key(input)
|
|
>>> print1 = result.fingerprint
|
|
>>> input = gpg.gen_key_input()
|
|
>>> result = gpg.gen_key(input)
|
|
>>> print2 = result.fingerprint
|
|
>>> result = gpg.encrypt("hello",print2)
|
|
>>> message = str(result)
|
|
>>> assert message != 'hello'
|
|
>>> result = gpg.decrypt(message)
|
|
>>> assert result
|
|
>>> str(result)
|
|
'hello'
|
|
>>> result = gpg.encrypt("hello again",print1)
|
|
>>> message = str(result)
|
|
>>> result = gpg.decrypt(message,passphrase='bar')
|
|
>>> result.status in ('decryption failed', 'bad passphrase')
|
|
True
|
|
>>> assert not result
|
|
>>> result = gpg.decrypt(message,passphrase='foo')
|
|
>>> result.status == 'decryption ok'
|
|
True
|
|
>>> str(result)
|
|
'hello again'
|
|
>>> result = gpg.encrypt("signed hello",print2,sign=print1,passphrase='foo')
|
|
>>> result.status == 'encryption ok'
|
|
True
|
|
>>> message = str(result)
|
|
>>> result = gpg.decrypt(message)
|
|
>>> result.status == 'decryption ok'
|
|
True
|
|
>>> assert result.fingerprint == print1
|
|
|
|
"""
|
|
data = _make_binary_stream(data, self.encoding)
|
|
result = self.encrypt_file(data, recipients, **kwargs)
|
|
data.close()
|
|
return result
|
|
|
|
def decrypt(self, message, **kwargs):
|
|
data = _make_binary_stream(message, self.encoding)
|
|
result = self.decrypt_file(data, **kwargs)
|
|
data.close()
|
|
return result
|
|
|
|
def decrypt_file(self, file, always_trust=False, passphrase=None,
|
|
output=None):
|
|
args = ["--decrypt"]
|
|
if output: # write the output to a file with the specified name
|
|
if os.path.exists(output):
|
|
os.remove(output) # to avoid overwrite confirmation message
|
|
args.append('--output "%s"' % output)
|
|
if always_trust:
|
|
args.append("--always-trust")
|
|
result = self.result_map['crypt'](self)
|
|
self._handle_io(args, file, result, passphrase, binary=True)
|
|
logger.debug('decrypt result: %r', result.data)
|
|
return result
|
|
|