1982675 - Unable to save attachment signed with OpenPGP

Status: NEW

(MailNews Core :: Security: OpenPGP, defect)

Description

[pap]

Attachment: archive with mentioned files

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:141.0) Gecko/20100101 Firefox/141.0

Steps to reproduce:

I have a signed (OpenPGP) message that was composed in Apple Mail. It contains some forwarded email as an attachment. Inner message is shown correctly in the viewer. When I press "Save" on the attachment, a Folder selection dialog appears but the attachment is not saved on the disk.

I use an updated release version of Thunderbird for Windows.

I created a test email for this bug, you can find it in the file "message.eml". Open it and try to save the attachment "Sample.eml".
The test email contains an incorrect signature, just like the original one. Anyway, the signature verification result does not affect the bug. If you want, you can sign the test email manually:

1. extract data to sign (or you can use "blob.txt" I filed to the report)
2. sign: gpg -sa --detach-sign -r "<your_key_id_here>" blob.txt
3. edit From header, use your email address from the pgp key
4. edit Date header: run date --rfc-email to get the correct date
5. substitute the signature with the contents of the blob.txt.asc

Actual results:

Attachment is not saved

Expected results:

Attachment should be saved correctly

Comment 1

[Magnus Melin [:mkmelin]]

Confirmed, I get

NS_BASE_STREAM_CLOSED: Component returned failure code: 0x80470002 (NS_BASE_STREAM_CLOSED) [nsIInputStream.available] NetUtil.sys.mjs:445
    readInputStream resource://gre/modules/NetUtil.sys.mjs:445
    buffer resource:///modules/AttachmentInfo.sys.mjs:270
    onStopRequest resource://gre/modules/NetUtil.sys.mjs:124