OpenPGP signature verification in Nautilus

Originally created by @intrigeri on #6608 (Redmine)

In seahorse-nautilus 3.8:

• No menu entry to check a signature (either selecting only the detached signature or both the original file and the detached signature)
• There is signature checking in seahorse-tool.
• The notification is far from ideal (doens’t show keyid nor fingerprint and disappears quickly).
• https://bugs.launchpad.net/ubuntu/+source/seahorse-nautilus/+bug/995623

Fixed upstream:

• shared-mime-info
  • https://bugs.freedesktop.org/show_bug.cgi?id=65679 (commit 2c3438c): Add missing globs and tests for OpenPGP files; fixed in s-m-i 1.2 (in Jessie)
  • https://bugs.freedesktop.org/show_bug.cgi?id=70539: Fixes the issue with .asc files for inline signatures: do not propose to verify the signature, since Seahorse doesn’t know how to do that. Merged upstream in December, 2013. Fixed in s-m-i 1.3: https://bugs.debian.org/743942
• seahorse-nautilus
  • warn when signatures are valid but untrusted: will be fixed in the release after 3.10.1 (not a blocker for Tails 1.1)

Feature Branch: feature/6608-OpenPGP-signature-verification-in-Nautilus

Parent Task: #5516 (closed)

Subtasks

• #7039 (closed)

Related issues

• Related to #7079 (closed)