Have seahorse-nautilus fully replace seahorse-plugins

Originally created by Tails on #5516 (Redmine)

Squeeze’s seahorse-plugins provided a variety of features that have disappeared in Wheezy.

Some of these features come back by installing a backport of seahorse-nautilus (currently in Jessie). For the other features (still missing in seahorse-nautilus 3.8.0), a newer upstream version, and a few other backports, are needed.

What is missing (blockers)

See sub-tasks.

What could be improved

Symmetric decryption

"Open with Decrypt File" or double-click managed to open an armored message with symmetric encryption
When decrypting such a message, a first dialog with "Encryption passphrase" appears, followed by another dialog "Decrypting" which takes away the focus from the passphrase dialog. That’s annoying.

Other missing features (non-blockers)

… that are not regressions, and thus not blockers for Tails 1.1:

Symmetric encryption: #6607 (closed)

What works

Support for multiple identities

There is a "Sign as" drop list when signing

Asymmetric encryption

There is a menu item "Encrypt…" below "Compress…"
Double-click on the file also works
The key selection window is a bit tiny by default. It really looks like the one from GPG Applet. But this one doesn’t have the "Trust" column.
Encryption works: it creates a file with .pgp extension

Signing

There is a menu item "Sign" below "Encrypt…"
Works: creates a detached signature with .sig extension
It is also possible to sign while doing asymmetric encryption

Asymmetric decryption

Works: the menu item is on top of the list "Open with Decrypt file"
Asks where to save the file

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

Parent Task: #6015 (closed)

Subtasks

Related issues

Related to #6607 (closed)

_Originally created by Tails on [#5516 (Redmine)](https://public-redmine-archive.tails.boum.org/code/issues/5516)_

Squeeze’s seahorse-plugins provided a variety of features that have
disappeared in Wheezy.

Some of these features come back by installing a backport of
[seahorse-nautilus](http://packages.debian.org/seahorse-nautilus)
(currently in Jessie). For the other features (still missing in
seahorse-nautilus 3.8.0), a newer upstream version, and a few other
backports, are needed.

# What is missing (blockers)

See sub-tasks.

# What could be improved

## Symmetric decryption

- "Open with Decrypt File\&quot; or double-click managed to open an
    armored message with symmetric encryption
  - When decrypting such a message, a first dialog with "Encryption
    passphrase\&quot; appears, followed by another dialog
    "Decrypting\&quot; which takes away the focus from the passphrase
    dialog. That’s annoying.

# Other missing features (non-blockers)

… that are not regressions, and thus not blockers for Tails 1.1:

- Symmetric encryption: tails/tails#6607

# What works

## Support for multiple identities

- There is a "Sign as\&quot; drop list when signing

## Asymmetric encryption

- There is a menu item "Encrypt…" below "Compress…"
  - Double-click on the file also works
  - The key selection window is a bit tiny by default. It really looks
    like the one from GPG Applet. But this one doesn’t have the
    "Trust\&quot; column.
  - Encryption works: it creates a file with .pgp extension

## Signing

- There is a menu item "Sign\&quot; below "Encrypt…"
  - Works: creates a detached signature with .sig extension
  - It is also possible to sign while doing asymmetric encryption

## Asymmetric decryption

- Works: the menu item is on top of the list "Open with Decrypt
    file\&quot;
  - Asks where to save the file

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

Parent Task: tails/tails#6015

### Subtasks

- [x] tails/tails#6608
  - [x] tails/tails#6647

### Related issues

- **Related to** tails/tails#6607

Edited May 15, 2020 by import-from-Redmine

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