1 files changed, 57 insertions, 0 deletions
diff --git a/dirmngr/misc.c b/dirmngr/misc.c
index 25652a252..53d0099d2 100644
--- a/dirmngr/misc.c
+++ b/dirmngr/misc.c
@@ -562,3 +562,60 @@ create_estream_ksba_reader (ksba_reader_t *r_reader, estream_t fp)
   *r_reader = reader;
   return 0;
 }
+
+gpg_error_t
+armor_data (char **r_string, const void *data, size_t datalen)
+{
+  gpg_error_t err;
+  struct b64state b64state;
+  estream_t fp;
+  long length;
+  char *buffer;
+  size_t nread;
+
+  *r_string = NULL;
+
+  fp = es_fopenmem (0, "rw,samethread");
+  if (!fp)
+    return gpg_error_from_syserror ();
+
+  if ((err=b64enc_start_es (&b64state, fp, "PGP PUBLIC KEY BLOCK"))
+      || (err=b64enc_write (&b64state, data, datalen))
+      || (err = b64enc_finish (&b64state)))
+    {
+      es_fclose (fp);
+      return err;
+    }
+
+  /* FIXME: To avoid the extra buffer allocation estream should
+     provide a function to snatch the internal allocated memory from
+     such a memory stream.  */
+  length = es_ftell (fp);
+  if (length < 0)
+    {
+      err = gpg_error_from_syserror ();
+      es_fclose (fp);
+      return err;
+    }
+
+  buffer = xtrymalloc (length+1);
+  if (!buffer)
+    {
+      err = gpg_error_from_syserror ();
+      es_fclose (fp);
+      return err;
+    }
+
+  es_rewind (fp);
+  if (es_read (fp, buffer, length, &nread))
+    {
+      err = gpg_error_from_syserror ();
+      es_fclose (fp);
+      return err;
+    }
+  buffer[nread] = 0;
+  es_fclose (fp);
+
+  *r_string = buffer;
+  return 0;
+}