diff options
Diffstat (limited to 'mail/src/leap/mail/smtp/rfc3156.py')
-rw-r--r-- | mail/src/leap/mail/smtp/rfc3156.py | 31 |
1 files changed, 22 insertions, 9 deletions
diff --git a/mail/src/leap/mail/smtp/rfc3156.py b/mail/src/leap/mail/smtp/rfc3156.py index dd48475..62a0675 100644 --- a/mail/src/leap/mail/smtp/rfc3156.py +++ b/mail/src/leap/mail/smtp/rfc3156.py @@ -24,6 +24,7 @@ import base64 from abc import ABCMeta, abstractmethod from StringIO import StringIO +from twisted.python import log from email.mime.application import MIMEApplication from email.mime.multipart import MIMEMultipart from email import errors @@ -145,14 +146,26 @@ def encode_base64(msg): :param msg: The non-multipart message to be encoded. :type msg: email.message.Message """ - orig = msg.get_payload() - encdata = _bencode(orig) - msg.set_payload(encdata) - # replace or set the Content-Transfer-Encoding header. - try: - msg.replace_header('Content-Transfer-Encoding', 'base64') - except KeyError: - msg['Content-Transfer-Encoding'] = 'base64' + encoding = msg.get('Content-Transfer-Encoding', None) + if encoding is not None: + encoding = encoding.lower() + # XXX Python's email module can only decode quoted-printable, base64 and + # uuencoded data, so we might have to implement other decoding schemes in + # order to support RFC 3156 properly and correctly calculate signatures + # for multipart attachments (eg. 7bit or 8bit encoded attachments). For + # now, if content is already encoded as base64 or if it is encoded with + # some unknown encoding, we just pass. + if encoding in [None, 'quoted-printable', 'x-uuencode', 'uue', 'x-uue']: + orig = msg.get_payload(decode=True) + encdata = _bencode(orig) + msg.set_payload(encdata) + # replace or set the Content-Transfer-Encoding header. + try: + msg.replace_header('Content-Transfer-Encoding', 'base64') + except KeyError: + msg['Content-Transfer-Encoding'] = 'base64' + elif encoding is not 'base64': + log.err('Unknown content-transfer-encoding: %s' % encoding) def encode_base64_rec(msg): @@ -361,7 +374,7 @@ class PGPSignature(MIMEApplication): """ def __init__(self, _data, name='signature.asc'): MIMEApplication.__init__(self, _data, 'pgp-signature', - _encoder=lambda x: x, name=name) + _encoder=lambda x: x, name=name) self.add_header('Content-Description', 'OpenPGP Digital Signature') |