1 /* $OpenBSD: chacha.h,v 1.8 2019/01/22 00:59:21 dlg Exp $ */ 2 /* 3 * Copyright (c) 2014 Joel Sing <jsing@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #ifndef HEADER_CHACHA_H 19 #define HEADER_CHACHA_H 20 21 #include <openssl/opensslconf.h> 22 23 #if defined(OPENSSL_NO_CHACHA) 24 #error ChaCha is disabled. 25 #endif 26 27 #include <stddef.h> 28 #include <stdint.h> 29 30 #ifdef __cplusplus 31 extern "C" { 32 #endif 33 34 typedef struct { 35 unsigned int input[16]; 36 unsigned char ks[64]; 37 unsigned char unused; 38 } ChaCha_ctx; 39 40 void ChaCha_set_key(ChaCha_ctx *ctx, const unsigned char *key, 41 unsigned int keybits); 42 void ChaCha_set_iv(ChaCha_ctx *ctx, const unsigned char *iv, 43 const unsigned char *counter); 44 void ChaCha(ChaCha_ctx *ctx, unsigned char *out, const unsigned char *in, 45 size_t len); 46 47 void CRYPTO_chacha_20(unsigned char *out, const unsigned char *in, size_t len, 48 const unsigned char key[32], const unsigned char iv[8], uint64_t counter); 49 void CRYPTO_xchacha_20(unsigned char *out, const unsigned char *in, size_t len, 50 const unsigned char key[32], const unsigned char iv[24]); 51 void CRYPTO_hchacha_20(unsigned char out[32], 52 const unsigned char key[32], const unsigned char iv[16]); 53 54 #ifdef __cplusplus 55 } 56 #endif 57 58 #endif /* HEADER_CHACHA_H */ 59