/* SPDX-License-Identifier: GPL-2.0 OR MIT */ #ifndef _CRYPTO_BLAKE2B_H#define _CRYPTO_BLAKE2B_H #include <linux/bug.h>#include <linux/types.h>#include <linux/kernel.h>#include <linux/string.h> enum blake2b_lengths {	BLAKE2B_BLOCK_SIZE = 128,	BLAKE2B_HASH_SIZE = 64,	BLAKE2B_KEY_SIZE = 64, 	BLAKE2B_160_HASH_SIZE = 20,	BLAKE2B_256_HASH_SIZE = 32,	BLAKE2B_384_HASH_SIZE = 48,	BLAKE2B_512_HASH_SIZE = 64,}; struct blake2b_state {	/* 'h', 't', and 'f' are used in assembly code, so keep them as-is. */	u64 h[8];	u64 t[2];	u64 f[2];	u8 buf[BLAKE2B_BLOCK_SIZE];	unsigned int buflen;	unsigned int outlen;}; enum blake2b_iv {	BLAKE2B_IV0 = 0x6A09E667F3BCC908ULL,	BLAKE2B_IV1 = 0xBB67AE8584CAA73BULL,	BLAKE2B_IV2 = 0x3C6EF372FE94F82BULL,	BLAKE2B_IV3 = 0xA54FF53A5F1D36F1ULL,	BLAKE2B_IV4 = 0x510E527FADE682D1ULL,	BLAKE2B_IV5 = 0x9B05688C2B3E6C1FULL,	BLAKE2B_IV6 = 0x1F83D9ABFB41BD6BULL,	BLAKE2B_IV7 = 0x5BE0CD19137E2179ULL,}; static inline void __blake2b_init(struct blake2b_state *state, size_t outlen,				  const void *key, size_t keylen){	state->h[0] = BLAKE2B_IV0 ^ (0x01010000 | keylen << 8 | outlen);	state->h[1] = BLAKE2B_IV1;	state->h[2] = BLAKE2B_IV2;	state->h[3] = BLAKE2B_IV3;	state->h[4] = BLAKE2B_IV4;	state->h[5] = BLAKE2B_IV5;	state->h[6] = BLAKE2B_IV6;	state->h[7] = BLAKE2B_IV7;	state->t[0] = 0;	state->t[1] = 0;	state->f[0] = 0;	state->f[1] = 0;	state->buflen = 0;	state->outlen = outlen;	if (keylen) {		memcpy(state->buf, key, keylen);		memset(&state->buf[keylen], 0, BLAKE2B_BLOCK_SIZE - keylen);		state->buflen = BLAKE2B_BLOCK_SIZE;	}} #endif /* _CRYPTO_BLAKE2B_H */