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 36