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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright (c) 2015, Joyent, Inc.
*/
#ifndef _CHACHA_H
#define _CHACHA_H
/*
* ChaCha cipher implementation header
*
* Note, the chacha C files that we have, have a compile time option for
* generating a keystream only. eg. in other words -DKEYSTREAM_ONLY. If using
* chacha, for something like arc4random, where you aren't doing encryption,
* then you should pass -DKEYSTREAM_ONLY. If encryption is being done, then it
* should not be defined. The main difference is basically doing another pass
* over the data and xoring it with the generated cipher.
*/
#include <inttypes.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct chacha_ctx {
uint32_t chacha_input[16];
} chacha_ctx_t;
extern void chacha_keysetup(chacha_ctx_t *, const uint8_t *, uint32_t,
uint32_t);
extern void chacha_ivsetup(chacha_ctx_t *, const uint8_t *);
extern void chacha_encrypt_bytes(chacha_ctx_t *, const uint8_t *, uint8_t *,
uint32_t);
#ifdef __cplusplus
}
#endif
#endif /* _CHACHA_H */
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