Merge tag 'gcc-plugins-v5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-microblaze.git] / 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
15 enum 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
26 struct 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
35 enum 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
46 void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen);
47 void blake2s_final(struct blake2s_state *state, u8 *out);
48
49 static 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
64 static 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
71 static 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
84 static 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
103 void blake2s256_hmac(u8 *out, const u8 *in, const u8 *key, const size_t inlen,
104                      const size_t keylen);
105
106 #endif /* BLAKE2S_H */