Hi all, at work, I use Balsa with IMAP, and many of our messages are s/mime encrypted, using the RFC 5751 application/pkcs7-mime “enveloped-data” media type. In this case, the top-level content type of the message is application/pkcs7-mime, and the body is just a single part containing the encrypted matter.
With messages on IMAP (with caching enabled), I saw the following effect: 1. select a not too small encrypted message, and click decrypt: decryption fails. The Gpgme debug log shows that no data is fed into gpgsm; 2. select “Message ▶ View Source…”: shows the base64 encoded encrypted body of the message. Feeding the data from the dialogue through base64 and gpgsm decrypts properly; 3. again click decrypt on the message: fails again; 4. select an other message in the same IMAP mailbox, and then again the one from step 1: now decryption is successful (data loaded from the cache?); 5. terminate Balsa, erase the cache ( ~/.balsa/imap-cache/*), start balsa again, and select the message from step 1: decryption fails. Apparently, Balsa does not properly load the message content if the message is a single-part application/pkcs7-mime message. Afaict, all multipart messages, including multipart/encrypted and multipart/signed, are loaded properly. After digging through the code, I /think/ the problem is in libbalsa_mailbox_imap_fetch_structure() which loads only text/* and short messages completely (to be honest, I don't understand why multipart/* is working, though…). At least, the attached trivial patch, just loading single-part S/MIME messages just as text/*, solves the issue for me. Any insight would be highly appreciated! Cheers, Albrecht.
diff --git a/libbalsa/mailbox_imap.c b/libbalsa/mailbox_imap.c
index d85e377c1..1abaa12a0 100644
--- a/libbalsa/mailbox_imap.c
+++ b/libbalsa/mailbox_imap.c
@@ -2247,7 +2247,8 @@ libbalsa_mailbox_imap_fetch_structure(LibBalsaMailbox *mailbox,
LIBBALSA_MESSAGE_GET_LENGTH(message)<8192 ||
(message->headers &&
(!message->headers->content_type ||
- g_mime_content_type_is_type(message->headers->content_type, "text", "*"))) ){
+ g_mime_content_type_is_type(message->headers->content_type, "text", "*") ||
+ g_mime_content_type_is_type(message->headers->content_type, "application", "pkcs7-mime")))) {
/* we could optimize this part a little bit: we do not need to
* keep reopening the stream. */
GMimeStream *stream =
pgpyWK_7YhuuJ.pgp
Description: PGP signature
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