1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 OR MIT */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #ifndef _CRYPTO_BLAKE2S_H
7*4882a593Smuzhiyun #define _CRYPTO_BLAKE2S_H
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/bug.h>
10*4882a593Smuzhiyun #include <linux/types.h>
11*4882a593Smuzhiyun #include <linux/kernel.h>
12*4882a593Smuzhiyun #include <linux/string.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun enum blake2s_lengths {
15*4882a593Smuzhiyun BLAKE2S_BLOCK_SIZE = 64,
16*4882a593Smuzhiyun BLAKE2S_HASH_SIZE = 32,
17*4882a593Smuzhiyun BLAKE2S_KEY_SIZE = 32,
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun BLAKE2S_128_HASH_SIZE = 16,
20*4882a593Smuzhiyun BLAKE2S_160_HASH_SIZE = 20,
21*4882a593Smuzhiyun BLAKE2S_224_HASH_SIZE = 28,
22*4882a593Smuzhiyun BLAKE2S_256_HASH_SIZE = 32,
23*4882a593Smuzhiyun };
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun struct blake2s_state {
26*4882a593Smuzhiyun /* 'h', 't', and 'f' are used in assembly code, so keep them as-is. */
27*4882a593Smuzhiyun u32 h[8];
28*4882a593Smuzhiyun u32 t[2];
29*4882a593Smuzhiyun u32 f[2];
30*4882a593Smuzhiyun u8 buf[BLAKE2S_BLOCK_SIZE];
31*4882a593Smuzhiyun unsigned int buflen;
32*4882a593Smuzhiyun unsigned int outlen;
33*4882a593Smuzhiyun };
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun enum blake2s_iv {
36*4882a593Smuzhiyun BLAKE2S_IV0 = 0x6A09E667UL,
37*4882a593Smuzhiyun BLAKE2S_IV1 = 0xBB67AE85UL,
38*4882a593Smuzhiyun BLAKE2S_IV2 = 0x3C6EF372UL,
39*4882a593Smuzhiyun BLAKE2S_IV3 = 0xA54FF53AUL,
40*4882a593Smuzhiyun BLAKE2S_IV4 = 0x510E527FUL,
41*4882a593Smuzhiyun BLAKE2S_IV5 = 0x9B05688CUL,
42*4882a593Smuzhiyun BLAKE2S_IV6 = 0x1F83D9ABUL,
43*4882a593Smuzhiyun BLAKE2S_IV7 = 0x5BE0CD19UL,
44*4882a593Smuzhiyun };
45*4882a593Smuzhiyun
__blake2s_init(struct blake2s_state * state,size_t outlen,const void * key,size_t keylen)46*4882a593Smuzhiyun static inline void __blake2s_init(struct blake2s_state *state, size_t outlen,
47*4882a593Smuzhiyun const void *key, size_t keylen)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun state->h[0] = BLAKE2S_IV0 ^ (0x01010000 | keylen << 8 | outlen);
50*4882a593Smuzhiyun state->h[1] = BLAKE2S_IV1;
51*4882a593Smuzhiyun state->h[2] = BLAKE2S_IV2;
52*4882a593Smuzhiyun state->h[3] = BLAKE2S_IV3;
53*4882a593Smuzhiyun state->h[4] = BLAKE2S_IV4;
54*4882a593Smuzhiyun state->h[5] = BLAKE2S_IV5;
55*4882a593Smuzhiyun state->h[6] = BLAKE2S_IV6;
56*4882a593Smuzhiyun state->h[7] = BLAKE2S_IV7;
57*4882a593Smuzhiyun state->t[0] = 0;
58*4882a593Smuzhiyun state->t[1] = 0;
59*4882a593Smuzhiyun state->f[0] = 0;
60*4882a593Smuzhiyun state->f[1] = 0;
61*4882a593Smuzhiyun state->buflen = 0;
62*4882a593Smuzhiyun state->outlen = outlen;
63*4882a593Smuzhiyun if (keylen) {
64*4882a593Smuzhiyun memcpy(state->buf, key, keylen);
65*4882a593Smuzhiyun memset(&state->buf[keylen], 0, BLAKE2S_BLOCK_SIZE - keylen);
66*4882a593Smuzhiyun state->buflen = BLAKE2S_BLOCK_SIZE;
67*4882a593Smuzhiyun }
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
blake2s_init(struct blake2s_state * state,const size_t outlen)70*4882a593Smuzhiyun static inline void blake2s_init(struct blake2s_state *state,
71*4882a593Smuzhiyun const size_t outlen)
72*4882a593Smuzhiyun {
73*4882a593Smuzhiyun __blake2s_init(state, outlen, NULL, 0);
74*4882a593Smuzhiyun }
75*4882a593Smuzhiyun
blake2s_init_key(struct blake2s_state * state,const size_t outlen,const void * key,const size_t keylen)76*4882a593Smuzhiyun static inline void blake2s_init_key(struct blake2s_state *state,
77*4882a593Smuzhiyun const size_t outlen, const void *key,
78*4882a593Smuzhiyun const size_t keylen)
79*4882a593Smuzhiyun {
80*4882a593Smuzhiyun WARN_ON(IS_ENABLED(DEBUG) && (!outlen || outlen > BLAKE2S_HASH_SIZE ||
81*4882a593Smuzhiyun !key || !keylen || keylen > BLAKE2S_KEY_SIZE));
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun __blake2s_init(state, outlen, key, keylen);
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen);
87*4882a593Smuzhiyun void blake2s_final(struct blake2s_state *state, u8 *out);
88*4882a593Smuzhiyun
blake2s(u8 * out,const u8 * in,const u8 * key,const size_t outlen,const size_t inlen,const size_t keylen)89*4882a593Smuzhiyun static inline void blake2s(u8 *out, const u8 *in, const u8 *key,
90*4882a593Smuzhiyun const size_t outlen, const size_t inlen,
91*4882a593Smuzhiyun const size_t keylen)
92*4882a593Smuzhiyun {
93*4882a593Smuzhiyun struct blake2s_state state;
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun WARN_ON(IS_ENABLED(DEBUG) && ((!in && inlen > 0) || !out || !outlen ||
96*4882a593Smuzhiyun outlen > BLAKE2S_HASH_SIZE || keylen > BLAKE2S_KEY_SIZE ||
97*4882a593Smuzhiyun (!key && keylen)));
98*4882a593Smuzhiyun
99*4882a593Smuzhiyun __blake2s_init(&state, outlen, key, keylen);
100*4882a593Smuzhiyun blake2s_update(&state, in, inlen);
101*4882a593Smuzhiyun blake2s_final(&state, out);
102*4882a593Smuzhiyun }
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun #endif /* _CRYPTO_BLAKE2S_H */
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