1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */ 1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
2 /* 2 /*
3 * Helper functions for BLAKE2b implementation 3 * Helper functions for BLAKE2b implementations.
4 * Keep this in sync with the corresponding BL 4 * Keep this in sync with the corresponding BLAKE2s header.
5 */ 5 */
6 6
7 #ifndef _CRYPTO_INTERNAL_BLAKE2B_H 7 #ifndef _CRYPTO_INTERNAL_BLAKE2B_H
8 #define _CRYPTO_INTERNAL_BLAKE2B_H 8 #define _CRYPTO_INTERNAL_BLAKE2B_H
9 9
10 #include <crypto/blake2b.h> 10 #include <crypto/blake2b.h>
11 #include <crypto/internal/hash.h> 11 #include <crypto/internal/hash.h>
12 #include <linux/string.h> 12 #include <linux/string.h>
13 13
14 void blake2b_compress_generic(struct blake2b_s 14 void blake2b_compress_generic(struct blake2b_state *state,
15 const u8 *block, 15 const u8 *block, size_t nblocks, u32 inc);
16 16
17 static inline void blake2b_set_lastblock(struc 17 static inline void blake2b_set_lastblock(struct blake2b_state *state)
18 { 18 {
19 state->f[0] = -1; 19 state->f[0] = -1;
20 } 20 }
21 21
22 typedef void (*blake2b_compress_t)(struct blak 22 typedef void (*blake2b_compress_t)(struct blake2b_state *state,
23 const u8 *b 23 const u8 *block, size_t nblocks, u32 inc);
24 24
25 static inline void __blake2b_update(struct bla 25 static inline void __blake2b_update(struct blake2b_state *state,
26 const u8 * 26 const u8 *in, size_t inlen,
27 blake2b_co 27 blake2b_compress_t compress)
28 { 28 {
29 const size_t fill = BLAKE2B_BLOCK_SIZE 29 const size_t fill = BLAKE2B_BLOCK_SIZE - state->buflen;
30 30
31 if (unlikely(!inlen)) 31 if (unlikely(!inlen))
32 return; 32 return;
33 if (inlen > fill) { 33 if (inlen > fill) {
34 memcpy(state->buf + state->buf 34 memcpy(state->buf + state->buflen, in, fill);
35 (*compress)(state, state->buf, 35 (*compress)(state, state->buf, 1, BLAKE2B_BLOCK_SIZE);
36 state->buflen = 0; 36 state->buflen = 0;
37 in += fill; 37 in += fill;
38 inlen -= fill; 38 inlen -= fill;
39 } 39 }
40 if (inlen > BLAKE2B_BLOCK_SIZE) { 40 if (inlen > BLAKE2B_BLOCK_SIZE) {
41 const size_t nblocks = DIV_ROU 41 const size_t nblocks = DIV_ROUND_UP(inlen, BLAKE2B_BLOCK_SIZE);
42 /* Hash one less (full) block 42 /* Hash one less (full) block than strictly possible */
43 (*compress)(state, in, nblocks 43 (*compress)(state, in, nblocks - 1, BLAKE2B_BLOCK_SIZE);
44 in += BLAKE2B_BLOCK_SIZE * (nb 44 in += BLAKE2B_BLOCK_SIZE * (nblocks - 1);
45 inlen -= BLAKE2B_BLOCK_SIZE * 45 inlen -= BLAKE2B_BLOCK_SIZE * (nblocks - 1);
46 } 46 }
47 memcpy(state->buf + state->buflen, in, 47 memcpy(state->buf + state->buflen, in, inlen);
48 state->buflen += inlen; 48 state->buflen += inlen;
49 } 49 }
50 50
51 static inline void __blake2b_final(struct blak 51 static inline void __blake2b_final(struct blake2b_state *state, u8 *out,
52 blake2b_com 52 blake2b_compress_t compress)
53 { 53 {
54 int i; 54 int i;
55 55
56 blake2b_set_lastblock(state); 56 blake2b_set_lastblock(state);
57 memset(state->buf + state->buflen, 0, 57 memset(state->buf + state->buflen, 0,
58 BLAKE2B_BLOCK_SIZE - state->buf 58 BLAKE2B_BLOCK_SIZE - state->buflen); /* Padding */
59 (*compress)(state, state->buf, 1, stat 59 (*compress)(state, state->buf, 1, state->buflen);
60 for (i = 0; i < ARRAY_SIZE(state->h); 60 for (i = 0; i < ARRAY_SIZE(state->h); i++)
61 __cpu_to_le64s(&state->h[i]); 61 __cpu_to_le64s(&state->h[i]);
62 memcpy(out, state->h, state->outlen); 62 memcpy(out, state->h, state->outlen);
63 } 63 }
64 64
65 /* Helper functions for shash implementations 65 /* Helper functions for shash implementations of BLAKE2b */
66 66
67 struct blake2b_tfm_ctx { 67 struct blake2b_tfm_ctx {
68 u8 key[BLAKE2B_KEY_SIZE]; 68 u8 key[BLAKE2B_KEY_SIZE];
69 unsigned int keylen; 69 unsigned int keylen;
70 }; 70 };
71 71
72 static inline int crypto_blake2b_setkey(struct 72 static inline int crypto_blake2b_setkey(struct crypto_shash *tfm,
73 const 73 const u8 *key, unsigned int keylen)
74 { 74 {
75 struct blake2b_tfm_ctx *tctx = crypto_ 75 struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(tfm);
76 76
77 if (keylen == 0 || keylen > BLAKE2B_KE 77 if (keylen == 0 || keylen > BLAKE2B_KEY_SIZE)
78 return -EINVAL; 78 return -EINVAL;
79 79
80 memcpy(tctx->key, key, keylen); 80 memcpy(tctx->key, key, keylen);
81 tctx->keylen = keylen; 81 tctx->keylen = keylen;
82 82
83 return 0; 83 return 0;
84 } 84 }
85 85
86 static inline int crypto_blake2b_init(struct s 86 static inline int crypto_blake2b_init(struct shash_desc *desc)
87 { 87 {
88 const struct blake2b_tfm_ctx *tctx = c 88 const struct blake2b_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
89 struct blake2b_state *state = shash_de 89 struct blake2b_state *state = shash_desc_ctx(desc);
90 unsigned int outlen = crypto_shash_dig 90 unsigned int outlen = crypto_shash_digestsize(desc->tfm);
91 91
92 __blake2b_init(state, outlen, tctx->ke 92 __blake2b_init(state, outlen, tctx->key, tctx->keylen);
93 return 0; 93 return 0;
94 } 94 }
95 95
96 static inline int crypto_blake2b_update(struct 96 static inline int crypto_blake2b_update(struct shash_desc *desc,
97 const 97 const u8 *in, unsigned int inlen,
98 blake2 98 blake2b_compress_t compress)
99 { 99 {
100 struct blake2b_state *state = shash_de 100 struct blake2b_state *state = shash_desc_ctx(desc);
101 101
102 __blake2b_update(state, in, inlen, com 102 __blake2b_update(state, in, inlen, compress);
103 return 0; 103 return 0;
104 } 104 }
105 105
106 static inline int crypto_blake2b_final(struct 106 static inline int crypto_blake2b_final(struct shash_desc *desc, u8 *out,
107 blake2b 107 blake2b_compress_t compress)
108 { 108 {
109 struct blake2b_state *state = shash_de 109 struct blake2b_state *state = shash_desc_ctx(desc);
110 110
111 __blake2b_final(state, out, compress); 111 __blake2b_final(state, out, compress);
112 return 0; 112 return 0;
113 } 113 }
114 114
115 #endif /* _CRYPTO_INTERNAL_BLAKE2B_H */ 115 #endif /* _CRYPTO_INTERNAL_BLAKE2B_H */
116 116
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