| /* $OpenBSD: chacha.h,v 1.7 2015/12/09 14:07:55 bcook Exp $ */ |
| /* |
| * Copyright (c) 2014 Joel Sing <jsing@openbsd.org> |
| * |
| * Permission to use, copy, modify, and distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| #ifndef HEADER_CHACHA_H |
| #define HEADER_CHACHA_H |
| |
| #include <openssl/opensslconf.h> |
| |
| #if defined(OPENSSL_NO_CHACHA) |
| #error ChaCha is disabled. |
| #endif |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| typedef struct { |
| unsigned int input[16]; |
| unsigned char ks[64]; |
| unsigned char unused; |
| } ChaCha_ctx; |
| |
| void ChaCha_set_key(ChaCha_ctx *ctx, const unsigned char *key, |
| unsigned int keybits); |
| void ChaCha_set_iv(ChaCha_ctx *ctx, const unsigned char *iv, |
| const unsigned char *counter); |
| void ChaCha(ChaCha_ctx *ctx, unsigned char *out, const unsigned char *in, |
| size_t len); |
| |
| void CRYPTO_chacha_20(unsigned char *out, const unsigned char *in, size_t len, |
| const unsigned char key[32], const unsigned char iv[8], uint64_t counter); |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* HEADER_CHACHA_H */ |