Jan Dittberner
222b35b033
* upgrade migrate repository structure (fixes #32, #27) * switch to PasteDeploy (fixes #31) * update for SQLAlchemy 0.5 compatibility * add python-gnutls dependency (addresses #35)
89 lines
2.7 KiB
Python
89 lines
2.7 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2007, 2008, 2009 by Jan Dittberner.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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# USA.
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#
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# Version: $Id$
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"""GPG mail handling.
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This module provides functionallity for sending signed and encrypted
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email using GnuPG.
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"""
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import smtplib
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from email.MIMEText import MIMEText
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from pyme import core
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from pyme.constants.sig import mode
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def send_mail(config, subject, text):
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"""Send a signed and possibly encrypted mail.
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This method sends a mail with the given text and subject and signs
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it using GnuPG. If a public key of the recipient is available the
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mail is encrypted. The sender and recipient addresses are taken
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from the configuration (section: common, properties: mailfrom,
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mailto)
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Arguments:
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subject -- mail subject
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text -- mail text
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"""
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if not text.__class__.__name__ == 'str':
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text = text.encode('ascii', 'replace')
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plain = core.Data(text)
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cipher = core.Data()
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c = core.Context()
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c.set_armor(1)
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signer = config['mailfrom']
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rcpt = config['mailto']
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c.signers_clear()
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for sigkey in [x for x in c.op_keylist_all(signer, 1)]:
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if sigkey.can_sign:
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c.signers_add(sigkey)
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if not c.signers_enum(0):
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raise Exception("No secret keys for signing available for %s." % (
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signer))
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keylist = []
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for key in c.op_keylist_all(rcpt, 0):
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valid = 0
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for subkey in key.subkeys:
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keyid = subkey.keyid
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if keyid == None:
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break
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can_encrypt = subkey.can_encrypt
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valid += can_encrypt
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if valid:
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keylist.append(key)
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if keylist:
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c.op_encrypt_sign(keylist, 1, plain, cipher)
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else:
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c.op_sign(plain, cipher, mode.CLEAR)
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cipher.seek(0, 0)
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msg = MIMEText(cipher.read())
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if keylist:
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msg.set_param("x-action", "pgp-encrypted")
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msg['Subject'] = subject
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msg['From'] = signer
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msg['To'] = rcpt
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s = smtplib.SMTP()
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s.connect()
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s.sendmail(signer, [rcpt], msg.as_string())
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s.close()
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