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1/* SPDX-License-Identifier: GPL-2.0 OR MIT */2/*3 * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.4 */5 6#ifndef _CRYPTO_BLAKE2S_H7#define _CRYPTO_BLAKE2S_H8 9#include <linux/bug.h>10#include <linux/kconfig.h>11#include <linux/types.h>12#include <linux/string.h>13 14enum blake2s_lengths {15 BLAKE2S_BLOCK_SIZE = 64,16 BLAKE2S_HASH_SIZE = 32,17 BLAKE2S_KEY_SIZE = 32,18 19 BLAKE2S_128_HASH_SIZE = 16,20 BLAKE2S_160_HASH_SIZE = 20,21 BLAKE2S_224_HASH_SIZE = 28,22 BLAKE2S_256_HASH_SIZE = 32,23};24 25struct blake2s_state {26 /* 'h', 't', and 'f' are used in assembly code, so keep them as-is. */27 u32 h[8];28 u32 t[2];29 u32 f[2];30 u8 buf[BLAKE2S_BLOCK_SIZE];31 unsigned int buflen;32 unsigned int outlen;33};34 35enum blake2s_iv {36 BLAKE2S_IV0 = 0x6A09E667UL,37 BLAKE2S_IV1 = 0xBB67AE85UL,38 BLAKE2S_IV2 = 0x3C6EF372UL,39 BLAKE2S_IV3 = 0xA54FF53AUL,40 BLAKE2S_IV4 = 0x510E527FUL,41 BLAKE2S_IV5 = 0x9B05688CUL,42 BLAKE2S_IV6 = 0x1F83D9ABUL,43 BLAKE2S_IV7 = 0x5BE0CD19UL,44};45 46static inline void __blake2s_init(struct blake2s_state *state, size_t outlen,47 const void *key, size_t keylen)48{49 state->h[0] = BLAKE2S_IV0 ^ (0x01010000 | keylen << 8 | outlen);50 state->h[1] = BLAKE2S_IV1;51 state->h[2] = BLAKE2S_IV2;52 state->h[3] = BLAKE2S_IV3;53 state->h[4] = BLAKE2S_IV4;54 state->h[5] = BLAKE2S_IV5;55 state->h[6] = BLAKE2S_IV6;56 state->h[7] = BLAKE2S_IV7;57 state->t[0] = 0;58 state->t[1] = 0;59 state->f[0] = 0;60 state->f[1] = 0;61 state->buflen = 0;62 state->outlen = outlen;63 if (keylen) {64 memcpy(state->buf, key, keylen);65 memset(&state->buf[keylen], 0, BLAKE2S_BLOCK_SIZE - keylen);66 state->buflen = BLAKE2S_BLOCK_SIZE;67 }68}69 70static inline void blake2s_init(struct blake2s_state *state,71 const size_t outlen)72{73 __blake2s_init(state, outlen, NULL, 0);74}75 76static inline void blake2s_init_key(struct blake2s_state *state,77 const size_t outlen, const void *key,78 const size_t keylen)79{80 WARN_ON(IS_ENABLED(DEBUG) && (!outlen || outlen > BLAKE2S_HASH_SIZE ||81 !key || !keylen || keylen > BLAKE2S_KEY_SIZE));82 83 __blake2s_init(state, outlen, key, keylen);84}85 86void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen);87void blake2s_final(struct blake2s_state *state, u8 *out);88 89static inline void blake2s(u8 *out, const u8 *in, const u8 *key,90 const size_t outlen, const size_t inlen,91 const size_t keylen)92{93 struct blake2s_state state;94 95 WARN_ON(IS_ENABLED(DEBUG) && ((!in && inlen > 0) || !out || !outlen ||96 outlen > BLAKE2S_HASH_SIZE || keylen > BLAKE2S_KEY_SIZE ||97 (!key && keylen)));98 99 __blake2s_init(&state, outlen, key, keylen);100 blake2s_update(&state, in, inlen);101 blake2s_final(&state, out);102}103 104#endif /* _CRYPTO_BLAKE2S_H */105