lib/helix.h

   1 #ifndef __helix_H
   2 #define __helix_H
   3
   4 typedef unsigned long WORD;
   5 typedef unsigned char UCHAR;
   6
   7 #define NONCE_LEN 16
   8 #define MAC_LEN   16
   9
  10 /* HELIX variables */
  11 typedef struct helix_ctx {
  12 WORD    h_iplus8[2];            /* block number maintained in two parts */
  13 WORD    K[8];                   /* expanded key */
  14 WORD    N[8];                   /* expanded nonce */
  15 int     l_u;                    /* length of user key */
  16 WORD    A, B, C, D, E;          /* Z_0..Z_4 in the paper */
  17 } helix_ctx;
  18
  19 #undef TEST
  20
  21 void
  22 h_key(struct helix_ctx *ctx, unsigned char *U, int U_len);
  23 void
  24 h_nonce(struct helix_ctx *ctx, UCHAR nonce[16]);
  25 void
  26 h_encrypt(struct helix_ctx *ctx, UCHAR *buf, int n, UCHAR macbuf[16]);
  27 void
  28 h_decrypt(struct helix_ctx *ctx, UCHAR *buf, int n, UCHAR macbuf[16]);
  29
  30 #endif