Hi David, Yes, I believe that GMime should be fixed to handle this case. It seems reasonable to me that both mime types should be treated as the same in cases like this. Jeff -----Original Message----- From: gmime-devel-list <gmime-devel-list-bounces@gnome.org> On Behalf Of David Bremner Sent: Monday, February 7, 2022 8:36 AM To: gmime-devel-list@gnome.org Cc: notmuch@notmuchmail.org; Alexander Adolf <alexander.adolf@condition-alpha.com>; Daniel Kahn Gillmor <dkg@debian.org> Subject: [EXTERNAL] [gmime-devel] g_mime_multipart_signed_verify and protocol mismatch I have a bug report from a notmuch user that notmuch is unable to verify the signature on a message with the following mime structure └┬╴multipart/signed 29717 bytes ├┬╴multipart/related 18125 bytes │├┬╴multipart/alternative 14402 bytes ││├─╴text/plain 2766 bytes ││└─╴text/html 11223 bytes │└─╴image/jpeg [image001.jpg] 3372 bytes └─╴application/pkcs7-signature attachment [smime.p7s] 6979 bytes The problem seems to be that the outer Content-Type declares Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; while the actual signature part has Content-Type: application/pkcs7-signature; gmime quite correctly reports this as a mismatch, but I wonder if it should be a tolerated mismatch? I saw there is already some attempt in gmime to alias the two content-types, but I didn't follow the scope of that aliasing. Unfortunately I cannot share the message in question, but if needed I could try to make an artificial test message with the same issue. All the best, David _______________________________________________ gmime-devel-list mailing list gmime-devel-list@gnome.org https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmail.gnome.org%2Fmailman%2Flistinfo%2Fgmime-devel-list&data=04%7C01%7Cjestedfa%40microsoft.com%7C80fc53d536d74054f3b508d9ea3ec725%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637798378089381179%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=0JzRQVHIldHJUe8dsd%2Fsx2tVsZUJScHzEw4VfQIUi0Q%3D&reserved=0 _______________________________________________ notmuch mailing list -- notmuch@notmuchmail.org To unsubscribe send an email to notmuch-leave@notmuchmail.org