From ac9ccb9ab069ae936798df23ba1f37d42bd1c79c Mon Sep 17 00:00:00 2001
From: Michael Rash <mbr@cipherdyne.org>
Date: Mon, 20 Feb 2017 21:54:22 -0500
Subject: [PATCH] [libfko] check NULL ptr before utilizing - discovered by the
 PVS-Studio static analyzer

---
 lib/fko_encryption.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/fko_encryption.c b/lib/fko_encryption.c
index 77d27125..e4549224 100644
--- a/lib/fko_encryption.c
+++ b/lib/fko_encryption.c
@@ -462,11 +462,11 @@ gpg_decrypt(fko_ctx_t ctx, const char *dec_key)
         if(res != FKO_SUCCESS) /* bail if there was some other problem */
             return(res);
 
-    pt_len = strnlen(ctx->encoded_msg, MAX_SPA_ENCODED_MSG_SIZE);
-
     if(ctx->encoded_msg == NULL)
         return(FKO_ERROR_INVALID_DATA_ENCRYPT_DECRYPTED_MESSAGE_MISSING);
 
+    pt_len = strnlen(ctx->encoded_msg, MAX_SPA_ENCODED_MSG_SIZE);
+
     if(! is_valid_encoded_msg_len(pt_len))
         return(FKO_ERROR_INVALID_DATA_ENCRYPT_DECRYPTED_MSGLEN_VALIDFAIL);