OPENPGP PLUGIN: Don't list expired/revoked GPG keyopenpgp-plugin-hide-revoked-expired

	- closes #91
	- Mention that GPG key may be expired or revoked in chat input
	box
	- in the account dialog if the number of OpenPGP keys found is
	0, the label also notes that a key may have been revoked or
	expired.
	- blocks input in chat box if key is use is revoked or expired
	  when switching conversation and can detect if your key has expired
	  while chatting
	- if current selected key is revoked or expired, it'll be shown
	  in account manager with a warning message: "Attention
	  required: your key xxxx is revoked/expired!"

1 files changed, 9 insertions, 0 deletions

diff --git a/plugins/openpgp/src/encryption_list_entry.vala b/plugins/openpgp/src/encryption_list_entry.vala
index cf5da8c4..5e61df8d 100644
--- a/plugins/openpgp/src/encryption_list_entry.vala
+++ b/plugins/openpgp/src/encryption_list_entry.vala
@@ -32,6 +32,7 @@ private class EncryptionListEntry : Plugins.EncryptionListEntry, Object {
         return null;
     }
 
+
     public void encryption_activated(Entities.Conversation conversation, Plugins.SetInputFieldStatus input_status_callback) {
         try {
             GPGHelper.get_public_key(db.get_account_key(conversation.account) ?? "");
@@ -40,6 +41,14 @@ private class EncryptionListEntry : Plugins.EncryptionListEntry, Object {
             return;
         }
 
+        GPG.Key key_check = GPGHelper.get_public_key(db.get_account_key(conversation.account));
+        if (key_check.expired || key_check.revoked){
+            string status_str = key_check.expired ? " has expired." : " has been revoked.";
+            debug("GPG public key %s is NOT fine for encryption: it %s.\n", key_check.fpr, status_str);
+            input_status_callback(new Plugins.InputFieldStatus("Your GPG key " + key_check.fpr + status_str, Plugins.InputFieldStatus.MessageType.ERROR, Plugins.InputFieldStatus.InputState.NO_SEND));
+            return;
+        }
+
         if (conversation.type_ == Conversation.Type.CHAT) {
             string? key_id = stream_interactor.get_module(Manager.IDENTITY).get_key_id(conversation.account, conversation.counterpart);
             if (key_id == null) {