19768ca48f57aaf035f508a473421d210b5145e99Greg Hartman/* $OpenBSD: chacha.h,v 1.4 2016/08/27 04:04:56 guenther Exp $ */ 2d059297112922cabb0c674840589be8db821fd9aAdam Langley 3d059297112922cabb0c674840589be8db821fd9aAdam Langley/* 4d059297112922cabb0c674840589be8db821fd9aAdam Langleychacha-merged.c version 20080118 5d059297112922cabb0c674840589be8db821fd9aAdam LangleyD. J. Bernstein 6d059297112922cabb0c674840589be8db821fd9aAdam LangleyPublic domain. 7d059297112922cabb0c674840589be8db821fd9aAdam Langley*/ 8d059297112922cabb0c674840589be8db821fd9aAdam Langley 9d059297112922cabb0c674840589be8db821fd9aAdam Langley#ifndef CHACHA_H 10d059297112922cabb0c674840589be8db821fd9aAdam Langley#define CHACHA_H 11d059297112922cabb0c674840589be8db821fd9aAdam Langley 12d059297112922cabb0c674840589be8db821fd9aAdam Langley#include <sys/types.h> 139768ca48f57aaf035f508a473421d210b5145e99Greg Hartman#include <stdlib.h> 14d059297112922cabb0c674840589be8db821fd9aAdam Langley 15d059297112922cabb0c674840589be8db821fd9aAdam Langleystruct chacha_ctx { 16d059297112922cabb0c674840589be8db821fd9aAdam Langley u_int input[16]; 17d059297112922cabb0c674840589be8db821fd9aAdam Langley}; 18d059297112922cabb0c674840589be8db821fd9aAdam Langley 19d059297112922cabb0c674840589be8db821fd9aAdam Langley#define CHACHA_MINKEYLEN 16 20d059297112922cabb0c674840589be8db821fd9aAdam Langley#define CHACHA_NONCELEN 8 21d059297112922cabb0c674840589be8db821fd9aAdam Langley#define CHACHA_CTRLEN 8 22d059297112922cabb0c674840589be8db821fd9aAdam Langley#define CHACHA_STATELEN (CHACHA_NONCELEN+CHACHA_CTRLEN) 23d059297112922cabb0c674840589be8db821fd9aAdam Langley#define CHACHA_BLOCKLEN 64 24d059297112922cabb0c674840589be8db821fd9aAdam Langley 25d059297112922cabb0c674840589be8db821fd9aAdam Langleyvoid chacha_keysetup(struct chacha_ctx *x, const u_char *k, u_int kbits) 26d059297112922cabb0c674840589be8db821fd9aAdam Langley __attribute__((__bounded__(__minbytes__, 2, CHACHA_MINKEYLEN))); 27d059297112922cabb0c674840589be8db821fd9aAdam Langleyvoid chacha_ivsetup(struct chacha_ctx *x, const u_char *iv, const u_char *ctr) 28d059297112922cabb0c674840589be8db821fd9aAdam Langley __attribute__((__bounded__(__minbytes__, 2, CHACHA_NONCELEN))) 29d059297112922cabb0c674840589be8db821fd9aAdam Langley __attribute__((__bounded__(__minbytes__, 3, CHACHA_CTRLEN))); 30d059297112922cabb0c674840589be8db821fd9aAdam Langleyvoid chacha_encrypt_bytes(struct chacha_ctx *x, const u_char *m, 31d059297112922cabb0c674840589be8db821fd9aAdam Langley u_char *c, u_int bytes) 32d059297112922cabb0c674840589be8db821fd9aAdam Langley __attribute__((__bounded__(__buffer__, 2, 4))) 33d059297112922cabb0c674840589be8db821fd9aAdam Langley __attribute__((__bounded__(__buffer__, 3, 4))); 34d059297112922cabb0c674840589be8db821fd9aAdam Langley 35d059297112922cabb0c674840589be8db821fd9aAdam Langley#endif /* CHACHA_H */ 36d059297112922cabb0c674840589be8db821fd9aAdam Langley 37