pem: Make sure we actually parsed some data

This could happen if there is no separating empty line between header
and body.

References #3627.

diff --git a/src/libstrongswan/plugins/pem/pem_builder.c b/src/libstrongswan/plugins/pem/pem_builder.c
index e9d464fe57bc86fe1f34f12c10f1bc1ebccbb59a..3b84eb7eaf5daae79745da7d27a982409d687027 100644 (file)
--- a/src/libstrongswan/plugins/pem/pem_builder.c
+++ b/src/libstrongswan/plugins/pem/pem_builder.c
@@ -330,7 +330,7 @@ static status_t pem_to_bin(chunk_t *blob, bool *pgp)
        /* set length to size of binary blob */
        blob->len = dst.len;
 
-       if (state != PEM_POST)
+       if (state != PEM_POST || !blob->len)
        {
                DBG1(DBG_LIB, "  file coded in unknown format, discarded");
                return PARSE_ERROR;