zlib compression/decompression skipped on empty blocks

Mbed-TLS · Jun 30, 2013 · abf2f8f · abf2f8f
1 parent e5bffc3
commit abf2f8f
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diff --git 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
@@ -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 )
     {