master 45630ca: Filter revoked keys when saving files

[Lars Ingebrigtsen]

branch: master
commit 45630ca6c839719dfc92583de5e606abba4b5718
Author: Lars Ingebrigtsen <larsi@gnus.org>
Commit: Lars Ingebrigtsen <larsi@gnus.org>

    Filter revoked keys when saving files
    
    * lisp/epa-file.el (epa-file-write-region): Use it to select a
    non-revoked key (bug#22359).
    
    * lisp/epg.el (epg--filter-revoked-keys): New function.
---
 lisp/epa-file.el | 3 ++-
 lisp/epg.el      | 7 +++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/lisp/epa-file.el b/lisp/epa-file.el
index 7fd4178..21dc1eb 100644
--- a/lisp/epa-file.el
+++ b/lisp/epa-file.el
@@ -309,7 +309,8 @@ encryption is used."
 If no one is selected, symmetric encryption will be performed.  "
                    recipients)
                 (if epa-file-encrypt-to
-                    (epg-list-keys context recipients)))))
+                     (epg--filter-revoked-keys
+                     (epg-list-keys context recipients))))))
       (error
        (epa-display-error context)
        (if (setq entry (assoc file epa-file-passphrase-alist))
diff --git a/lisp/epg.el b/lisp/epg.el
index 920b853..b27e2c6 100644
--- a/lisp/epg.el
+++ b/lisp/epg.el
@@ -1382,6 +1382,13 @@ NAME is either a string or a list of strings."
       (setq pointer (cdr pointer)))
     keys))
 
+(defun epg--filter-revoked-keys (keys)
+  (seq-remove (lambda (key)
+                (seq-find (lambda (user)
+                            (eq (epg-user-id-validity user) 'revoked))
+                          (epg-key-user-id-list key)))
+              keys))
+
 (defun epg--args-from-sig-notations (notations)
   (apply #'nconc
         (mapcar