1 /* $OpenBSD: rijndael.h,v 1.13 2008/06/09 07:49:45 djm Exp $ */ 2 3 /** 4 * rijndael-alg-fst.h 5 * 6 * @version 3.0 (December 2000) 7 * 8 * Optimised ANSI C code for the Rijndael cipher (now AES) 9 * 10 * @author Vincent Rijmen <vincent.rijmen@esat.kuleuven.ac.be> 11 * @author Antoon Bosselaers <antoon.bosselaers@esat.kuleuven.ac.be> 12 * @author Paulo Barreto <paulo.barreto@terra.com.br> 13 * 14 * This code is hereby placed in the public domain. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY EXPRESS 17 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 23 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 25 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 26 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 #ifndef __RIJNDAEL_H 29 #define __RIJNDAEL_H 30 31 #include <stdint.h> 32 33 #define AES_MAXKEYBITS (256) 34 #define AES_MAXKEYBYTES (AES_MAXKEYBITS/8) 35 /* for 256-bit keys we need 14 rounds for a 128 we only need 10 round */ 36 #define AES_MAXROUNDS 10 37 38 /* bergmann: to avoid conflicts with typedefs from certain Contiki platforms, 39 * the following type names have been prefixed with "aes_": */ 40 typedef unsigned char u_char; 41 typedef uint8_t aes_u8; 42 typedef uint16_t aes_u16; 43 typedef uint32_t aes_u32; 44 45 /* The structure for key information */ 46 typedef struct { 47 #ifdef WITH_AES_DECRYPT 48 int enc_only; /* context contains only encrypt schedule */ 49 #endif 50 int Nr; /* key-length-dependent number of rounds */ 51 aes_u32 ek[4*(AES_MAXROUNDS + 1)]; /* encrypt key schedule */ 52 #ifdef WITH_AES_DECRYPT 53 aes_u32 dk[4*(AES_MAXROUNDS + 1)]; /* decrypt key schedule */ 54 #endif 55 } rijndael_ctx; 56 57 int rijndael_set_key(rijndael_ctx *, const u_char *, int); 58 int rijndael_set_key_enc_only(rijndael_ctx *, const u_char *, int); 59 void rijndael_decrypt(rijndael_ctx *, const u_char *, u_char *); 60 void rijndael_encrypt(rijndael_ctx *, const u_char *, u_char *); 61 62 int rijndaelKeySetupEnc(aes_u32 rk[/*4*(Nr + 1)*/], const aes_u8 cipherKey[], int keyBits); 63 int rijndaelKeySetupDec(aes_u32 rk[/*4*(Nr + 1)*/], const aes_u8 cipherKey[], int keyBits); 64 void rijndaelEncrypt(const aes_u32 rk[/*4*(Nr + 1)*/], int Nr, const aes_u8 pt[16], aes_u8 ct[16]); 65 66 #endif /* __RIJNDAEL_H */ 67