[seahorse] Add basic support for ECDSA and ED25519 SSH Keys.

[Niels De Graef <nielsdg src gnome org>]

commit 1fa74341dbb54796e94bdf2dd66909dd29209df2
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Sun Mar 4 12:13:32 2018 +0100

    Add basic support for ECDSA and ED25519 SSH Keys.

 ssh/algorithm.vala           |   18 +++++++++++++++++-
 ssh/seahorse-ssh-generate.ui |    2 ++
 2 files changed, 19 insertions(+), 1 deletions(-)
---
diff --git a/ssh/algorithm.vala b/ssh/algorithm.vala
index c300d91..9dd75fb 100644
--- a/ssh/algorithm.vala
+++ b/ssh/algorithm.vala
@@ -24,7 +24,9 @@
 public enum Seahorse.Ssh.Algorithm {
     UNKNOWN,
     RSA,
-    DSA;
+    DSA,
+    ECDSA,
+    ED25519;
 
     /**
      * Returns a (non-localized) string representation.
@@ -39,6 +41,10 @@ public enum Seahorse.Ssh.Algorithm {
                 return "RSA";
             case DSA:
                 return "DSA";
+            case ECDSA:
+                return "ECDSA";
+            case ED25519:
+                return "ED25519";
             default:
                 assert_not_reached ();
         };
@@ -60,6 +66,10 @@ public enum Seahorse.Ssh.Algorithm {
             case "dsa":
             case "dss":
                 return DSA;
+            case "ecdsa":
+                return ECDSA;
+            case "ed25519":
+                return ED25519;
             default:
                 return UNKNOWN;
         }
@@ -82,6 +92,12 @@ public enum Seahorse.Ssh.Algorithm {
         if (("dsa" in str_down) || ("dss" in str_down))
             return DSA;
 
+        if ("ecdsa" in str_down)
+            return ECDSA;
+
+        if ("ed25519" in str_down)
+            return ED25519;
+
         return UNKNOWN;
     }
 }
diff --git a/ssh/seahorse-ssh-generate.ui b/ssh/seahorse-ssh-generate.ui
index fc34a0b..459f6f4 100644
--- a/ssh/seahorse-ssh-generate.ui
+++ b/ssh/seahorse-ssh-generate.ui
@@ -253,6 +253,8 @@
                             <items>
                               <item translatable="yes">RSA</item>
                               <item translatable="yes">DSA</item>
+                              <item translatable="yes">ECDSA</item>
+                              <item translatable="yes">ED25519</item>
                             </items>
                           </object>
                         </child>