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+/* $OpenBSD: rijndael.h,v 1.15 2021/09/28 11:14:50 dtucker Exp $ */
+
+/**
+ * rijndael-alg-fst.h
+ *
+ * @version 3.0 (December 2000)
+ *
+ * Optimised ANSI C code for the Rijndael cipher (now AES)
+ *
+ * @author Vincent Rijmen <vincent.rijmen@esat.kuleuven.ac.be>
+ * @author Antoon Bosselaers <antoon.bosselaers@esat.kuleuven.ac.be>
+ * @author Paulo Barreto <paulo.barreto@terra.com.br>
+ *
+ * This code is hereby placed in the public domain.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef _PRIVATE_RIJNDAEL_H
+#define _PRIVATE_RIJNDAEL_H
+
+#define AES_MAXKEYBITS (256)
+#define AES_MAXKEYBYTES (AES_MAXKEYBITS/8)
+/* for 256-bit keys, fewer for less */
+#define AES_MAXROUNDS 14
+
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+
+int rijndaelKeySetupEnc(unsigned int [], const unsigned char [], int);
+void rijndaelEncrypt(const unsigned int [], int, const u8 [16], u8 [16]);
+
+/* The structure for key information */
+typedef struct {
+ int decrypt;
+ int Nr; /* key-length-dependent number of rounds */
+ u32 ek[4*(AES_MAXROUNDS + 1)]; /* encrypt key schedule */
+ u32 dk[4*(AES_MAXROUNDS + 1)]; /* decrypt key schedule */
+} rijndael_ctx;
+
+void rijndael_set_key(rijndael_ctx *, u_char *, int, int);
+void rijndael_decrypt(rijndael_ctx *, u_char *, u_char *);
+void rijndael_encrypt(rijndael_ctx *, u_char *, u_char *);
+
+#endif /* _PRIVATE_RIJNDAEL_H */