67 lines · c
1/* SPDX-License-Identifier: GPL-2.0 OR MIT */2 3#ifndef _CRYPTO_BLAKE2B_H4#define _CRYPTO_BLAKE2B_H5 6#include <linux/bug.h>7#include <linux/types.h>8#include <linux/string.h>9 10enum blake2b_lengths {11 BLAKE2B_BLOCK_SIZE = 128,12 BLAKE2B_HASH_SIZE = 64,13 BLAKE2B_KEY_SIZE = 64,14 15 BLAKE2B_160_HASH_SIZE = 20,16 BLAKE2B_256_HASH_SIZE = 32,17 BLAKE2B_384_HASH_SIZE = 48,18 BLAKE2B_512_HASH_SIZE = 64,19};20 21struct blake2b_state {22 /* 'h', 't', and 'f' are used in assembly code, so keep them as-is. */23 u64 h[8];24 u64 t[2];25 u64 f[2];26 u8 buf[BLAKE2B_BLOCK_SIZE];27 unsigned int buflen;28 unsigned int outlen;29};30 31enum blake2b_iv {32 BLAKE2B_IV0 = 0x6A09E667F3BCC908ULL,33 BLAKE2B_IV1 = 0xBB67AE8584CAA73BULL,34 BLAKE2B_IV2 = 0x3C6EF372FE94F82BULL,35 BLAKE2B_IV3 = 0xA54FF53A5F1D36F1ULL,36 BLAKE2B_IV4 = 0x510E527FADE682D1ULL,37 BLAKE2B_IV5 = 0x9B05688C2B3E6C1FULL,38 BLAKE2B_IV6 = 0x1F83D9ABFB41BD6BULL,39 BLAKE2B_IV7 = 0x5BE0CD19137E2179ULL,40};41 42static inline void __blake2b_init(struct blake2b_state *state, size_t outlen,43 const void *key, size_t keylen)44{45 state->h[0] = BLAKE2B_IV0 ^ (0x01010000 | keylen << 8 | outlen);46 state->h[1] = BLAKE2B_IV1;47 state->h[2] = BLAKE2B_IV2;48 state->h[3] = BLAKE2B_IV3;49 state->h[4] = BLAKE2B_IV4;50 state->h[5] = BLAKE2B_IV5;51 state->h[6] = BLAKE2B_IV6;52 state->h[7] = BLAKE2B_IV7;53 state->t[0] = 0;54 state->t[1] = 0;55 state->f[0] = 0;56 state->f[1] = 0;57 state->buflen = 0;58 state->outlen = outlen;59 if (keylen) {60 memcpy(state->buf, key, keylen);61 memset(&state->buf[keylen], 0, BLAKE2B_BLOCK_SIZE - keylen);62 state->buflen = BLAKE2B_BLOCK_SIZE;63 }64}65 66#endif /* _CRYPTO_BLAKE2B_H */67