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