+#if (OPENSSL_VERSION_NUMBER < 0x00907000L) || defined(OPENSSL_LOBOTOMISED_AES)
+# define USE_BUILTIN_RIJNDAEL
+#endif
+
+#ifdef USE_BUILTIN_RIJNDAEL
+# include "rijndael.h"
+# define AES_KEY rijndael_ctx
+# define AES_BLOCK_SIZE 16
+# define AES_encrypt(a, b, c) rijndael_encrypt(c, a, b)
+# define AES_set_encrypt_key(a, b, c) rijndael_set_key(c, (char *)a, b, 1)