LXR linux/include/crypto/blake2s.h

   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 BLAKE2S_H
   7#define BLAKE2S_H
   8
   9#include <linux/types.h>
  10#include <linux/kernel.h>
  11#include <linux/string.h>
  12
  13#include <asm/bug.h>
  14
  15enum blake2s_lengths {
  16        BLAKE2S_BLOCK_SIZE = 64,
  17        BLAKE2S_HASH_SIZE = 32,
  18        BLAKE2S_KEY_SIZE = 32,
  19
  20        BLAKE2S_128_HASH_SIZE = 16,
  21        BLAKE2S_160_HASH_SIZE = 20,
  22        BLAKE2S_224_HASH_SIZE = 28,
  23        BLAKE2S_256_HASH_SIZE = 32,
  24};
  25
  26struct blake2s_state {
  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
  46void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen);
  47void blake2s_final(struct blake2s_state *state, u8 *out);
  48
  49static inline void blake2s_init_param(struct blake2s_state *state,
  50                                      const u32 param)
  51{
  52        *state = (struct blake2s_state){{
  53                BLAKE2S_IV0 ^ param,
  54                BLAKE2S_IV1,
  55                BLAKE2S_IV2,
  56                BLAKE2S_IV3,
  57                BLAKE2S_IV4,
  58                BLAKE2S_IV5,
  59                BLAKE2S_IV6,
  60                BLAKE2S_IV7,
  61        }};
  62}
  63
  64static inline void blake2s_init(struct blake2s_state *state,
  65                                const size_t outlen)
  66{
  67        blake2s_init_param(state, 0x01010000 | outlen);
  68        state->outlen = outlen;
  69}
  70
  71static inline void blake2s_init_key(struct blake2s_state *state,
  72                                    const size_t outlen, const void *key,
  73                                    const size_t keylen)
  74{
  75        WARN_ON(IS_ENABLED(DEBUG) && (!outlen || outlen > BLAKE2S_HASH_SIZE ||
  76                !key || !keylen || keylen > BLAKE2S_KEY_SIZE));
  77
  78        blake2s_init_param(state, 0x01010000 | keylen << 8 | outlen);
  79        memcpy(state->buf, key, keylen);
  80        state->buflen = BLAKE2S_BLOCK_SIZE;
  81        state->outlen = outlen;
  82}
  83
  84static inline void blake2s(u8 *out, const u8 *in, const u8 *key,
  85                           const size_t outlen, const size_t inlen,
  86                           const size_t keylen)
  87{
  88        struct blake2s_state state;
  89
  90        WARN_ON(IS_ENABLED(DEBUG) && ((!in && inlen > 0) || !out || !outlen ||
  91                outlen > BLAKE2S_HASH_SIZE || keylen > BLAKE2S_KEY_SIZE ||
  92                (!key && keylen)));
  93
  94        if (keylen)
  95                blake2s_init_key(&state, outlen, key, keylen);
  96        else
  97                blake2s_init(&state, outlen);
  98
  99        blake2s_update(&state, in, inlen);
 100        blake2s_final(&state, out);
 101}
 102
 103void blake2s256_hmac(u8 *out, const u8 *in, const u8 *key, const size_t inlen,
 104                     const size_t keylen);
 105
 106#endif /* BLAKE2S_H */
 107