From d1018e4ca5097cf7dde4caf2a909ca462b327bfe Mon Sep 17 00:00:00 2001
From: Max Lv <max.c.lv@gmail.com>
Date: Sat, 11 Feb 2017 09:12:02 +0800
Subject: [PATCH] Ignore empty payload

---
 src/aead.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/aead.c b/src/aead.c
index eff13b21..baf2ce3e 100644
--- a/src/aead.c
+++ b/src/aead.c
@@ -586,6 +586,9 @@ aead_chunk_decrypt(cipher_ctx_t *ctx, uint8_t *p, uint8_t *c, uint8_t *n,
     mlen = ntohs(*(uint16_t *)len_buf);
     mlen = mlen & CHUNK_SIZE_MASK;
 
+    if (mlen == 0)
+        return CRYPTO_ERROR;
+
     size_t chunk_len = 2 * tlen + CHUNK_SIZE_LEN + mlen;
 
     if (*clen < chunk_len)