Add ARIA 32-bit implementation

Modified code from http://seed.kisa.or.kr to human readable code.
Previous 8-bit code is available with -DOPENSSL_SMALL_FOOTPRINT.
New code is >2x faster.
Reviewed-by: NAndy Polyakov <appro@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3242)

crypto/include/internal/aria.h

@@ -11,6 +11,8 @@
  * Copyright (c) 2017 Oracle and/or its affiliates.  All rights reserved.
  */
 
+ /* Copyright (c) 2017 National Security Resarch Institute.  All rights reserved. */
+
 #ifndef HEADER_ARIA_H
 # define HEADER_ARIA_H
 
@@ -20,8 +22,6 @@
 #  error ARIA is disabled.
 # endif
 
-# include <stddef.h>
-
 # define ARIA_ENCRYPT     1
 # define ARIA_DECRYPT     0
 
@@ -32,11 +32,14 @@
 extern "C" {
 # endif
 
-typedef unsigned char ARIA_u128[ARIA_BLOCK_SIZE];
+typedef union {
+    unsigned char c[ARIA_BLOCK_SIZE];
+    unsigned int u[ARIA_BLOCK_SIZE / sizeof(unsigned int)];
+} ARIA_u128;
 
 struct aria_key_st {
-    unsigned int rounds;
     ARIA_u128 rd_key[ARIA_MAX_KEYS];
+    unsigned int rounds;
 };
 typedef struct aria_key_st ARIA_KEY;