From abf2f8fcf9f616d0dad81c89bb31e24ffaef9174 Mon Sep 17 00:00:00 2001
From: Paul Bakker <p.j.bakker@polarssl.org>
Date: Sun, 30 Jun 2013 14:57:46 +0200
Subject: [PATCH] zlib compression/decompression skipped on empty blocks

---
 ChangeLog         | 1 +
 library/ssl_tls.c | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 66a5c9cd2..4a02d1fc9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -25,6 +25,7 @@ Changes
 
 Bugfix
    * Fixed parse error in ssl_parse_certificate_request()
+   * zlib compression/decompression skipped on empty blocks
 
 = Version 1.2.8 released 2013-06-19
 Features
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 139aea96f..62d8d555d 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -1296,6 +1296,9 @@ static int ssl_compress_buf( ssl_context *ssl )
 
     SSL_DEBUG_MSG( 2, ( "=> compress buf" ) );
 
+    if( len_pre == 0 )
+        return( 0 );
+
     msg_pre = (unsigned char*) malloc( len_pre );
     if( msg_pre == NULL )
     {
@@ -1347,6 +1350,9 @@ static int ssl_decompress_buf( ssl_context *ssl )
 
     SSL_DEBUG_MSG( 2, ( "=> decompress buf" ) );
 
+    if( len_pre == 0 )
+        return( 0 );
+
     msg_pre = (unsigned char*) malloc( len_pre );
     if( msg_pre == NULL )
     {