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/string.h> |
9 | |
10 | enum 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 | |
21 | struct 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 | |
31 | enum 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 | |
42 | static 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 | |