perf tools: Enable libtraceevent dynamic linking
[linux-2.6-microblaze.git] / include / crypto / sha512_base.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * sha512_base.h - core logic for SHA-512 implementations
4  *
5  * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
6  */
7
8 #ifndef _CRYPTO_SHA512_BASE_H
9 #define _CRYPTO_SHA512_BASE_H
10
11 #include <crypto/internal/hash.h>
12 #include <crypto/sha2.h>
13 #include <linux/crypto.h>
14 #include <linux/module.h>
15 #include <linux/string.h>
16
17 #include <asm/unaligned.h>
18
19 typedef void (sha512_block_fn)(struct sha512_state *sst, u8 const *src,
20                                int blocks);
21
22 static inline int sha384_base_init(struct shash_desc *desc)
23 {
24         struct sha512_state *sctx = shash_desc_ctx(desc);
25
26         sctx->state[0] = SHA384_H0;
27         sctx->state[1] = SHA384_H1;
28         sctx->state[2] = SHA384_H2;
29         sctx->state[3] = SHA384_H3;
30         sctx->state[4] = SHA384_H4;
31         sctx->state[5] = SHA384_H5;
32         sctx->state[6] = SHA384_H6;
33         sctx->state[7] = SHA384_H7;
34         sctx->count[0] = sctx->count[1] = 0;
35
36         return 0;
37 }
38
39 static inline int sha512_base_init(struct shash_desc *desc)
40 {
41         struct sha512_state *sctx = shash_desc_ctx(desc);
42
43         sctx->state[0] = SHA512_H0;
44         sctx->state[1] = SHA512_H1;
45         sctx->state[2] = SHA512_H2;
46         sctx->state[3] = SHA512_H3;
47         sctx->state[4] = SHA512_H4;
48         sctx->state[5] = SHA512_H5;
49         sctx->state[6] = SHA512_H6;
50         sctx->state[7] = SHA512_H7;
51         sctx->count[0] = sctx->count[1] = 0;
52
53         return 0;
54 }
55
56 static inline int sha512_base_do_update(struct shash_desc *desc,
57                                         const u8 *data,
58                                         unsigned int len,
59                                         sha512_block_fn *block_fn)
60 {
61         struct sha512_state *sctx = shash_desc_ctx(desc);
62         unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE;
63
64         sctx->count[0] += len;
65         if (sctx->count[0] < len)
66                 sctx->count[1]++;
67
68         if (unlikely((partial + len) >= SHA512_BLOCK_SIZE)) {
69                 int blocks;
70
71                 if (partial) {
72                         int p = SHA512_BLOCK_SIZE - partial;
73
74                         memcpy(sctx->buf + partial, data, p);
75                         data += p;
76                         len -= p;
77
78                         block_fn(sctx, sctx->buf, 1);
79                 }
80
81                 blocks = len / SHA512_BLOCK_SIZE;
82                 len %= SHA512_BLOCK_SIZE;
83
84                 if (blocks) {
85                         block_fn(sctx, data, blocks);
86                         data += blocks * SHA512_BLOCK_SIZE;
87                 }
88                 partial = 0;
89         }
90         if (len)
91                 memcpy(sctx->buf + partial, data, len);
92
93         return 0;
94 }
95
96 static inline int sha512_base_do_finalize(struct shash_desc *desc,
97                                           sha512_block_fn *block_fn)
98 {
99         const int bit_offset = SHA512_BLOCK_SIZE - sizeof(__be64[2]);
100         struct sha512_state *sctx = shash_desc_ctx(desc);
101         __be64 *bits = (__be64 *)(sctx->buf + bit_offset);
102         unsigned int partial = sctx->count[0] % SHA512_BLOCK_SIZE;
103
104         sctx->buf[partial++] = 0x80;
105         if (partial > bit_offset) {
106                 memset(sctx->buf + partial, 0x0, SHA512_BLOCK_SIZE - partial);
107                 partial = 0;
108
109                 block_fn(sctx, sctx->buf, 1);
110         }
111
112         memset(sctx->buf + partial, 0x0, bit_offset - partial);
113         bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61);
114         bits[1] = cpu_to_be64(sctx->count[0] << 3);
115         block_fn(sctx, sctx->buf, 1);
116
117         return 0;
118 }
119
120 static inline int sha512_base_finish(struct shash_desc *desc, u8 *out)
121 {
122         unsigned int digest_size = crypto_shash_digestsize(desc->tfm);
123         struct sha512_state *sctx = shash_desc_ctx(desc);
124         __be64 *digest = (__be64 *)out;
125         int i;
126
127         for (i = 0; digest_size > 0; i++, digest_size -= sizeof(__be64))
128                 put_unaligned_be64(sctx->state[i], digest++);
129
130         memzero_explicit(sctx, sizeof(*sctx));
131         return 0;
132 }
133
134 #endif /* _CRYPTO_SHA512_BASE_H */