1 /* $OpenBSD: chacha.h,v 1.5 2021/04/03 05:54:14 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 #include <stdlib.h> 14 15 struct chacha_ctx { 16 u_int input[16]; 17 }; 18 19 #define CHACHA_MINKEYLEN 16 20 #define CHACHA_NONCELEN 8 21 #define CHACHA_CTRLEN 8 22 #define CHACHA_STATELEN (CHACHA_NONCELEN+CHACHA_CTRLEN) 23 #define CHACHA_BLOCKLEN 64 24 25 void chacha_keysetup(struct chacha_ctx *x, const u_char *k, u_int kbits) 26 __attribute__((__bounded__(__minbytes__, 2, CHACHA_MINKEYLEN))); 27 void chacha_ivsetup(struct chacha_ctx *x, const u_char *iv, const u_char *ctr) 28 __attribute__((__bounded__(__minbytes__, 2, CHACHA_NONCELEN))) 29 __attribute__((__bounded__(__minbytes__, 3, CHACHA_CTRLEN))); 30 void chacha_encrypt_bytes(struct chacha_ctx *x, const u_char *m, 31 u_char *c, u_int bytes) 32 __attribute__((__bounded__(__buffer__, 2, 4))) 33 __attribute__((__bounded__(__buffer__, 3, 4))); 34 35 #endif /* CHACHA_H */ 36 37