/* SPDX-License-Identifier: GPL-2.0 OR MIT *//* * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. */ #ifndef BLAKE2S_H#define BLAKE2S_H #include <linux/types.h>#include <linux/kernel.h>#include <linux/string.h> #include <asm/bug.h> enum blake2s_lengths {	BLAKE2S_BLOCK_SIZE = 64,	BLAKE2S_HASH_SIZE = 32,	BLAKE2S_KEY_SIZE = 32, 	BLAKE2S_128_HASH_SIZE = 16,	BLAKE2S_160_HASH_SIZE = 20,	BLAKE2S_224_HASH_SIZE = 28,	BLAKE2S_256_HASH_SIZE = 32,}; struct blake2s_state {	u32 h[8];	u32 t[2];	u32 f[2];	u8 buf[BLAKE2S_BLOCK_SIZE];	unsigned int buflen;	unsigned int outlen;}; enum blake2s_iv {	BLAKE2S_IV0 = 0x6A09E667UL,	BLAKE2S_IV1 = 0xBB67AE85UL,	BLAKE2S_IV2 = 0x3C6EF372UL,	BLAKE2S_IV3 = 0xA54FF53AUL,	BLAKE2S_IV4 = 0x510E527FUL,	BLAKE2S_IV5 = 0x9B05688CUL,	BLAKE2S_IV6 = 0x1F83D9ABUL,	BLAKE2S_IV7 = 0x5BE0CD19UL,}; void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen);void blake2s_final(struct blake2s_state *state, u8 *out); static inline void blake2s_init_param(struct blake2s_state *state,				      const u32 param){	*state = (struct blake2s_state){{		BLAKE2S_IV0 ^ param,		BLAKE2S_IV1,		BLAKE2S_IV2,		BLAKE2S_IV3,		BLAKE2S_IV4,		BLAKE2S_IV5,		BLAKE2S_IV6,		BLAKE2S_IV7,	}};} static inline void blake2s_init(struct blake2s_state *state,				const size_t outlen){	blake2s_init_param(state, 0x01010000 | outlen);	state->outlen = outlen;} static inline void blake2s_init_key(struct blake2s_state *state,				    const size_t outlen, const void *key,				    const size_t keylen){	WARN_ON(IS_ENABLED(DEBUG) && (!outlen || outlen > BLAKE2S_HASH_SIZE ||		!key || !keylen || keylen > BLAKE2S_KEY_SIZE)); 	blake2s_init_param(state, 0x01010000 | keylen << 8 | outlen);	memcpy(state->buf, key, keylen);	state->buflen = BLAKE2S_BLOCK_SIZE;	state->outlen = 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);} void blake2s256_hmac(u8 *out, const u8 *in, const u8 *key, const size_t inlen,		     const size_t keylen); #endif /* BLAKE2S_H */