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/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/*
* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*/
#ifndef _ZINC_BLAKE2S_H
#define _ZINC_BLAKE2S_H
#include <linux/types.h>
#include <linux/kernel.h>
#include <asm/bug.h>
enum blake2s_lengths {
BLAKE2S_BLOCK_SIZE = 64,
BLAKE2S_HASH_SIZE = 32,
BLAKE2S_KEY_SIZE = 32
};
struct blake2s_state {
u32 h[8];
u32 t[2];
u32 f[2];
u8 buf[BLAKE2S_BLOCK_SIZE];
size_t buflen;
u8 last_node;
};
void blake2s_init(struct blake2s_state *state, const size_t outlen);
void blake2s_init_key(struct blake2s_state *state, const size_t outlen,
const void *key, const size_t keylen);
void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen);
void blake2s_final(struct blake2s_state *state, u8 *out, const size_t outlen);
static inline void blake2s(u8 *out, const u8 *in, const u8 *key,
const size_t outlen, const size_t inlen,
const size_t keylen)
{
struct blake2s_state state;
WARN_ON(IS_ENABLED(DEBUG) && ((!in && inlen > 0) || !out || !outlen ||
outlen > BLAKE2S_HASH_SIZE || keylen > BLAKE2S_KEY_SIZE ||
(!key && keylen)));
if (keylen)
blake2s_init_key(&state, outlen, key, keylen);
else
blake2s_init(&state, outlen);
blake2s_update(&state, in, inlen);
blake2s_final(&state, out, outlen);
}
void blake2s_hmac(u8 *out, const u8 *in, const u8 *key, const size_t outlen,
const size_t inlen, const size_t keylen);
#endif /* _ZINC_BLAKE2S_H */
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