Calculate hashes of ssl encryption and decryption keys

Optimize the key switching mechanism to set the key only if 
a different operation is performed with the context.
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
diff --git a/programs/ssl/query_config.c b/programs/ssl/query_config.c
index e8fd634..ac0ef2e 100644
--- a/programs/ssl/query_config.c
+++ b/programs/ssl/query_config.c
@@ -1874,6 +1874,14 @@
     }
 #endif /* MBEDTLS_CRC_C */
 
+#if defined(MBEDTLS_VALIDATE_SSL_KEYS_INTEGRITY)
+    if( strcmp( "MBEDTLS_VALIDATE_SSL_KEYS_INTEGRITY", config ) == 0 )
+    {
+        MACRO_EXPANSION_TO_STR( MBEDTLS_VALIDATE_SSL_KEYS_INTEGRITY );
+        return( 0 );
+    }
+#endif /* MBEDTLS_VALIDATE_SSL_KEYS_INTEGRITY */
+
 #if defined(MBEDTLS_VALIDATE_AES_KEYS_INTEGRITY)
     if( strcmp( "MBEDTLS_VALIDATE_AES_KEYS_INTEGRITY", config ) == 0 )
     {