Initial code checking for backup - not yet working.

dirmngr/ks-action.c

@@ -0,0 +1,90 @@
+/* ks-action.c - OpenPGP keyserver actions
+ * Copyright (C) 2011 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#include "dirmngr.h"
+#include "misc.h"
+#include "ks-engine.h"
+#include "ks-action.h"
+
+
+/* Copy all data from IN to OUT.  */
+static gpg_error_t
+copy_stream (estream_t in, estream_t out)
+{
+  char buffer[512];
+  size_t nread;
+
+  while (!es_read (in, buffer, sizeof buffer, &nread))
+    {
+      if (!nread)
+        return 0; /* EOF */
+      if (es_write (out, buffer, nread, NULL))
+        break;
+
+    }
+  return gpg_error_from_syserror ();
+}
+
+
+
+/* Search all configured keyservers for keys matching PATTERNS and
+   write the result to the provided output stream.  */
+gpg_error_t
+ks_action_search (ctrl_t ctrl, strlist_t patterns, estream_t outfp)
+{
+  gpg_error_t err = 0;
+  int any = 0;
+  uri_item_t uri;
+  estream_t infp;
+
+  if (!patterns)
+    return gpg_error (GPG_ERR_NO_USER_ID);
+
+  /* FIXME: We only take care of the first pattern.  To fully support
+     multiple patterns we might either want to run several queries in
+     parallel and merge them.  We also need to decide what to do with
+     errors - it might not be the best idea to ignore an error from
+     one server and silently continue with another server.  For now we
+     stop at the first error. */
+  for (uri = ctrl->keyservers; !err && uri; uri = uri->next)
+    {
+      if (uri->parsed_uri->is_http)
+        {
+          any = 1;
+          err = ks_hkp_search (ctrl, uri->parsed_uri, patterns->d, &infp);
+          if (!err)
+            {
+              err = copy_stream (infp, outfp);
+              es_fclose (infp);
+            }
+        }
+    }
+
+  if (!any)
+    err = gpg_error (GPG_ERR_NO_KEYSERVER);
+  return err;
+}
+