+ int selected;
+ state->part_count += 1;
+
+ if (! (GMIME_IS_PART (part) || GMIME_IS_MULTIPART (part) || GMIME_IS_MESSAGE_PART (part))) {
+ fprintf (stderr, "Warning: Not displaying unknown mime part: %s.\n",
+ g_type_name (G_OBJECT_TYPE (part)));
+ return;
+ }
+
+ selected = (params->part <= 0 || state->part_count == params->part);
+
+ if (selected || state->in_zone) {
+ if (!first && (params->part <= 0 || state->in_zone))
+ fputs (format->part_sep, stdout);
+
+ if (format->part_start)
+ format->part_start (part, &(state->part_count));
+ }
+
+ /* handle PGP/MIME parts */
+ if (GMIME_IS_MULTIPART (part) && params->cryptoctx) {
+ GMimeMultipart *multipart = GMIME_MULTIPART (part);
+ GError* err = NULL;
+
+ if (GMIME_IS_MULTIPART_SIGNED (part))
+ {
+ if ( g_mime_multipart_get_count (multipart) != 2 ) {
+ /* this violates RFC 3156 section 5, so we won't bother with it. */
+ fprintf (stderr,
+ "Error: %d part(s) for a multipart/signed message (should be exactly 2)\n",
+ g_mime_multipart_get_count (multipart));
+ } else {
+ /* For some reason the GMimeSignatureValidity returned
+ * here is not a const (inconsistent with that
+ * returned by
+ * g_mime_multipart_encrypted_get_signature_validity,
+ * and therefore needs to be properly disposed of.
+ * Hopefully the API will become more consistent. */
+ GMimeSignatureValidity *sigvalidity = g_mime_multipart_signed_verify (GMIME_MULTIPART_SIGNED (part), params->cryptoctx, &err);
+ if (!sigvalidity) {
+ fprintf (stderr, "Failed to verify signed part: %s\n", (err ? err->message : "no error explanation given"));
+ }
+ if ((selected || state->in_zone) && format->part_sigstatus)
+ format->part_sigstatus (sigvalidity);
+ /* extract only data part, and ignore signature part */
+ part = g_mime_multipart_get_part (multipart, 0);
+ if (sigvalidity)
+ g_mime_signature_validity_free (sigvalidity);
+ }
+ }
+
+ if (err)
+ g_error_free (err);
+ }
+ /* end handle PGP/MIME parts */
+
+ if (selected || state->in_zone)
+ format->part_content (part);