[evolution] Bug 205718 - Import public keys from messages

[Milan Crha <mcrha src gnome org>]

commit 67d5a37597668c6e769ddde69522340c1d2f46a1
Author: Milan Crha <mcrha redhat com>
Date:   Tue May 30 10:27:42 2017 +0200

    Bug 205718 - Import public keys from messages

 src/em-format/e-mail-part-secure-button.c |   82 +++++++++++++++++++++++++++-
 1 files changed, 79 insertions(+), 3 deletions(-)
---
diff --git a/src/em-format/e-mail-part-secure-button.c b/src/em-format/e-mail-part-secure-button.c
index 9351e9d..2a9c6e1 100644
--- a/src/em-format/e-mail-part-secure-button.c
+++ b/src/em-format/e-mail-part-secure-button.c
@@ -65,6 +65,75 @@ viewcert_clicked (GtkWidget *button,
                        info->email ? info->email : "");
        }
 }
+
+static void
+importcert_clicked (GtkWidget *button,
+                   GtkWidget *grid)
+{
+       ECert *ec;
+       gchar *data = NULL;
+       guint32 len = 0;
+       GError *error = NULL;
+
+       g_return_if_fail (GTK_IS_BUTTON (button));
+
+       ec = g_object_get_data (G_OBJECT (button), "e-cert-info");
+       g_return_if_fail (E_IS_CERT (ec));
+
+       g_warn_if_fail (e_cert_get_raw_der (ec, &data, &len));
+
+       if (!e_cert_db_import_email_cert (e_cert_db_peek (), data, len, NULL, &error)) {
+               GtkWidget *parent;
+
+               parent = gtk_widget_get_toplevel (grid);
+               if (!GTK_IS_WINDOW (parent))
+                       parent = NULL;
+
+               e_notice (parent, GTK_MESSAGE_ERROR, _("Failed to import certificate: %s"),
+                       error ? error->message : _("Unknown error"));
+
+               g_clear_error (&error);
+       } else {
+               gtk_widget_set_sensitive (button, FALSE);
+       }
+}
+
+static gboolean
+secure_button_smime_cert_exists (const gchar *email,
+                                ECert *ec)
+{
+       CERTCertificate *found_cert;
+       ECert *found_ec;
+       gboolean found = FALSE;
+
+       if (!email || !*email)
+               return FALSE;
+
+       g_return_val_if_fail (E_IS_CERT (ec), FALSE);
+
+       found_cert = CERT_FindCertByNicknameOrEmailAddr (CERT_GetDefaultCertDB (), email);
+       if (!found_cert)
+               return FALSE;
+
+       found_ec = e_cert_new (found_cert);
+       if (!found_ec)
+               return FALSE;
+
+       #define compare_nonnull(_func) (!_func (ec) || g_strcmp0 (_func (ec), _func (found_ec)) == 0)
+
+       if (compare_nonnull (e_cert_get_serial_number) &&
+           compare_nonnull (e_cert_get_sha1_fingerprint) &&
+           compare_nonnull (e_cert_get_md5_fingerprint)) {
+               found = TRUE;
+       }
+
+       #undef compare_nonnull
+
+       g_object_unref (found_ec);
+
+       return found;
+}
+
 #endif
 
 static void
@@ -123,10 +192,17 @@ add_cert_table (GtkWidget *grid,
                        if (info->cert_data)
                                ec = e_cert_new (CERT_DupCertificate (info->cert_data));
 
-                       if (ec == NULL)
+                       if (ec == NULL) {
                                gtk_widget_set_sensitive (w, FALSE);
-                       else
-                               g_object_unref (ec);
+                       } else {
+                               w = gtk_button_new_with_mnemonic (_("_Import Certificate"));
+                               gtk_table_attach (table, w, 2, 3, n, n + 1, 0, 0, 3, 3);
+                               g_object_set_data_full (G_OBJECT (w), "e-cert-info", ec, g_object_unref);
+                               g_signal_connect (
+                                       w, "clicked",
+                                       G_CALLBACK (importcert_clicked), grid);
+                               gtk_widget_set_sensitive (w, !secure_button_smime_cert_exists (info->email, 
ec));
+                       }
 #else
                        w = gtk_label_new (_("This certificate is not viewable"));
                        gtk_table_attach (table, w, 1, 2, n, n + 1, 0, 0, 3, 3);