1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */ 1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
2 2
3 #ifndef _CRYPTO_BLAKE2B_H 3 #ifndef _CRYPTO_BLAKE2B_H
4 #define _CRYPTO_BLAKE2B_H 4 #define _CRYPTO_BLAKE2B_H
5 5
6 #include <linux/bug.h> 6 #include <linux/bug.h>
7 #include <linux/types.h> 7 #include <linux/types.h>
8 #include <linux/string.h> 8 #include <linux/string.h>
9 9
10 enum blake2b_lengths { 10 enum blake2b_lengths {
11 BLAKE2B_BLOCK_SIZE = 128, 11 BLAKE2B_BLOCK_SIZE = 128,
12 BLAKE2B_HASH_SIZE = 64, 12 BLAKE2B_HASH_SIZE = 64,
13 BLAKE2B_KEY_SIZE = 64, 13 BLAKE2B_KEY_SIZE = 64,
14 14
15 BLAKE2B_160_HASH_SIZE = 20, 15 BLAKE2B_160_HASH_SIZE = 20,
16 BLAKE2B_256_HASH_SIZE = 32, 16 BLAKE2B_256_HASH_SIZE = 32,
17 BLAKE2B_384_HASH_SIZE = 48, 17 BLAKE2B_384_HASH_SIZE = 48,
18 BLAKE2B_512_HASH_SIZE = 64, 18 BLAKE2B_512_HASH_SIZE = 64,
19 }; 19 };
20 20
21 struct blake2b_state { 21 struct blake2b_state {
22 /* 'h', 't', and 'f' are used in assem 22 /* 'h', 't', and 'f' are used in assembly code, so keep them as-is. */
23 u64 h[8]; 23 u64 h[8];
24 u64 t[2]; 24 u64 t[2];
25 u64 f[2]; 25 u64 f[2];
26 u8 buf[BLAKE2B_BLOCK_SIZE]; 26 u8 buf[BLAKE2B_BLOCK_SIZE];
27 unsigned int buflen; 27 unsigned int buflen;
28 unsigned int outlen; 28 unsigned int outlen;
29 }; 29 };
30 30
31 enum blake2b_iv { 31 enum blake2b_iv {
32 BLAKE2B_IV0 = 0x6A09E667F3BCC908ULL, 32 BLAKE2B_IV0 = 0x6A09E667F3BCC908ULL,
33 BLAKE2B_IV1 = 0xBB67AE8584CAA73BULL, 33 BLAKE2B_IV1 = 0xBB67AE8584CAA73BULL,
34 BLAKE2B_IV2 = 0x3C6EF372FE94F82BULL, 34 BLAKE2B_IV2 = 0x3C6EF372FE94F82BULL,
35 BLAKE2B_IV3 = 0xA54FF53A5F1D36F1ULL, 35 BLAKE2B_IV3 = 0xA54FF53A5F1D36F1ULL,
36 BLAKE2B_IV4 = 0x510E527FADE682D1ULL, 36 BLAKE2B_IV4 = 0x510E527FADE682D1ULL,
37 BLAKE2B_IV5 = 0x9B05688C2B3E6C1FULL, 37 BLAKE2B_IV5 = 0x9B05688C2B3E6C1FULL,
38 BLAKE2B_IV6 = 0x1F83D9ABFB41BD6BULL, 38 BLAKE2B_IV6 = 0x1F83D9ABFB41BD6BULL,
39 BLAKE2B_IV7 = 0x5BE0CD19137E2179ULL, 39 BLAKE2B_IV7 = 0x5BE0CD19137E2179ULL,
40 }; 40 };
41 41
42 static inline void __blake2b_init(struct blake 42 static inline void __blake2b_init(struct blake2b_state *state, size_t outlen,
43 const void * 43 const void *key, size_t keylen)
44 { 44 {
45 state->h[0] = BLAKE2B_IV0 ^ (0x0101000 45 state->h[0] = BLAKE2B_IV0 ^ (0x01010000 | keylen << 8 | outlen);
46 state->h[1] = BLAKE2B_IV1; 46 state->h[1] = BLAKE2B_IV1;
47 state->h[2] = BLAKE2B_IV2; 47 state->h[2] = BLAKE2B_IV2;
48 state->h[3] = BLAKE2B_IV3; 48 state->h[3] = BLAKE2B_IV3;
49 state->h[4] = BLAKE2B_IV4; 49 state->h[4] = BLAKE2B_IV4;
50 state->h[5] = BLAKE2B_IV5; 50 state->h[5] = BLAKE2B_IV5;
51 state->h[6] = BLAKE2B_IV6; 51 state->h[6] = BLAKE2B_IV6;
52 state->h[7] = BLAKE2B_IV7; 52 state->h[7] = BLAKE2B_IV7;
53 state->t[0] = 0; 53 state->t[0] = 0;
54 state->t[1] = 0; 54 state->t[1] = 0;
55 state->f[0] = 0; 55 state->f[0] = 0;
56 state->f[1] = 0; 56 state->f[1] = 0;
57 state->buflen = 0; 57 state->buflen = 0;
58 state->outlen = outlen; 58 state->outlen = outlen;
59 if (keylen) { 59 if (keylen) {
60 memcpy(state->buf, key, keylen 60 memcpy(state->buf, key, keylen);
61 memset(&state->buf[keylen], 0, 61 memset(&state->buf[keylen], 0, BLAKE2B_BLOCK_SIZE - keylen);
62 state->buflen = BLAKE2B_BLOCK_ 62 state->buflen = BLAKE2B_BLOCK_SIZE;
63 } 63 }
64 } 64 }
65 65
66 #endif /* _CRYPTO_BLAKE2B_H */ 66 #endif /* _CRYPTO_BLAKE2B_H */
67 67
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