crypto/openssh/chacha.h

   1 /* $OpenBSD: chacha.h,v 1.3 2014/05/02 03:27:54 djm Exp $ */
   2
   3 /*
   4 chacha-merged.c version 20080118
   5 D. J. Bernstein
   6 Public domain.
   7 */
   8
   9 #ifndef CHACHA_H
  10 #define CHACHA_H
  11
  12 #include <sys/types.h>
  13
  14 struct chacha_ctx {
  15         u_int input[16];
  16 };
  17
  18 #define CHACHA_MINKEYLEN        16
  19 #define CHACHA_NONCELEN         8
  20 #define CHACHA_CTRLEN           8
  21 #define CHACHA_STATELEN         (CHACHA_NONCELEN+CHACHA_CTRLEN)
  22 #define CHACHA_BLOCKLEN         64
  23
  24 void chacha_keysetup(struct chacha_ctx *x, const u_char *k, u_int kbits)
  25     __attribute__((__bounded__(__minbytes__, 2, CHACHA_MINKEYLEN)));
  26 void chacha_ivsetup(struct chacha_ctx *x, const u_char *iv, const u_char *ctr)
  27     __attribute__((__bounded__(__minbytes__, 2, CHACHA_NONCELEN)))
  28     __attribute__((__bounded__(__minbytes__, 3, CHACHA_CTRLEN)));
  29 void chacha_encrypt_bytes(struct chacha_ctx *x, const u_char *m,
  30     u_char *c, u_int bytes)
  31     __attribute__((__bounded__(__buffer__, 2, 4)))
  32     __attribute__((__bounded__(__buffer__, 3, 4)));
  33
  34 #endif  /* CHACHA_H */
  35