| guenther@openbsd.org | fa4a4c9 | 2016-08-27 04:04:56 +0000 | [diff] [blame] | 1 | /* $OpenBSD: chacha.h,v 1.4 2016/08/27 04:04:56 guenther Exp $ */ |
| Damien Miller | 0fde8ac | 2013-11-21 14:12:23 +1100 | [diff] [blame] | 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> |
| guenther@openbsd.org | fa4a4c9 | 2016-08-27 04:04:56 +0000 | [diff] [blame] | 13 | #include <stdlib.h> |
| Damien Miller | 0fde8ac | 2013-11-21 14:12:23 +1100 | [diff] [blame] | 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) |
| Damien Miller | 686c7d9 | 2014-05-15 14:37:03 +1000 | [diff] [blame] | 26 | __attribute__((__bounded__(__minbytes__, 2, CHACHA_MINKEYLEN))); |
| Damien Miller | 0fde8ac | 2013-11-21 14:12:23 +1100 | [diff] [blame] | 27 | void chacha_ivsetup(struct chacha_ctx *x, const u_char *iv, const u_char *ctr) |
| Damien Miller | 686c7d9 | 2014-05-15 14:37:03 +1000 | [diff] [blame] | 28 | __attribute__((__bounded__(__minbytes__, 2, CHACHA_NONCELEN))) |
| 29 | __attribute__((__bounded__(__minbytes__, 3, CHACHA_CTRLEN))); |
| Damien Miller | 0fde8ac | 2013-11-21 14:12:23 +1100 | [diff] [blame] | 30 | void chacha_encrypt_bytes(struct chacha_ctx *x, const u_char *m, |
| 31 | u_char *c, u_int bytes) |
| Damien Miller | 686c7d9 | 2014-05-15 14:37:03 +1000 | [diff] [blame] | 32 | __attribute__((__bounded__(__buffer__, 2, 4))) |
| 33 | __attribute__((__bounded__(__buffer__, 3, 4))); |
| Damien Miller | 0fde8ac | 2013-11-21 14:12:23 +1100 | [diff] [blame] | 34 | |
| 35 | #endif /* CHACHA_H */ |
| 36 | |