zlib compression/decompression skipped on empty blocks

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

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 )
     {