From: Tobias Brunner <tobias@strongswan.org>
Date: Tue, 10 Nov 2020 17:14:36 +0000 (+0100)
Subject: pem: Make sure we actually parsed some data
X-Git-Tag: 5.9.2dr1~31
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=abb3f67bd1ad2e417edef0e98c42ea5cc485ae6d;p=thirdparty%2Fstrongswan.git

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 e9d464fe57..3b84eb7eaf 100644
--- 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;