1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 2
3 #include <crypto/internal/hash.h> 3 #include <crypto/internal/hash.h>
4 #include <linux/init.h> 4 #include <linux/init.h>
5 #include <linux/module.h> 5 #include <linux/module.h>
6 #include <linux/xxhash.h> 6 #include <linux/xxhash.h>
7 #include <linux/unaligned.h> 7 #include <linux/unaligned.h>
8 8
9 #define XXHASH64_BLOCK_SIZE 32 9 #define XXHASH64_BLOCK_SIZE 32
10 #define XXHASH64_DIGEST_SIZE 8 10 #define XXHASH64_DIGEST_SIZE 8
11 11
12 struct xxhash64_tfm_ctx { 12 struct xxhash64_tfm_ctx {
13 u64 seed; 13 u64 seed;
14 }; 14 };
15 15
16 struct xxhash64_desc_ctx { 16 struct xxhash64_desc_ctx {
17 struct xxh64_state xxhstate; 17 struct xxh64_state xxhstate;
18 }; 18 };
19 19
20 static int xxhash64_setkey(struct crypto_shash 20 static int xxhash64_setkey(struct crypto_shash *tfm, const u8 *key,
21 unsigned int keylen) 21 unsigned int keylen)
22 { 22 {
23 struct xxhash64_tfm_ctx *tctx = crypto 23 struct xxhash64_tfm_ctx *tctx = crypto_shash_ctx(tfm);
24 24
25 if (keylen != sizeof(tctx->seed)) 25 if (keylen != sizeof(tctx->seed))
26 return -EINVAL; 26 return -EINVAL;
27 tctx->seed = get_unaligned_le64(key); 27 tctx->seed = get_unaligned_le64(key);
28 return 0; 28 return 0;
29 } 29 }
30 30
31 static int xxhash64_init(struct shash_desc *de 31 static int xxhash64_init(struct shash_desc *desc)
32 { 32 {
33 struct xxhash64_tfm_ctx *tctx = crypto 33 struct xxhash64_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
34 struct xxhash64_desc_ctx *dctx = shash 34 struct xxhash64_desc_ctx *dctx = shash_desc_ctx(desc);
35 35
36 xxh64_reset(&dctx->xxhstate, tctx->see 36 xxh64_reset(&dctx->xxhstate, tctx->seed);
37 37
38 return 0; 38 return 0;
39 } 39 }
40 40
41 static int xxhash64_update(struct shash_desc * 41 static int xxhash64_update(struct shash_desc *desc, const u8 *data,
42 unsigned int length) 42 unsigned int length)
43 { 43 {
44 struct xxhash64_desc_ctx *dctx = shash 44 struct xxhash64_desc_ctx *dctx = shash_desc_ctx(desc);
45 45
46 xxh64_update(&dctx->xxhstate, data, le 46 xxh64_update(&dctx->xxhstate, data, length);
47 47
48 return 0; 48 return 0;
49 } 49 }
50 50
51 static int xxhash64_final(struct shash_desc *d 51 static int xxhash64_final(struct shash_desc *desc, u8 *out)
52 { 52 {
53 struct xxhash64_desc_ctx *dctx = shash 53 struct xxhash64_desc_ctx *dctx = shash_desc_ctx(desc);
54 54
55 put_unaligned_le64(xxh64_digest(&dctx- 55 put_unaligned_le64(xxh64_digest(&dctx->xxhstate), out);
56 56
57 return 0; 57 return 0;
58 } 58 }
59 59
60 static int xxhash64_digest(struct shash_desc * 60 static int xxhash64_digest(struct shash_desc *desc, const u8 *data,
61 unsigned int length, 61 unsigned int length, u8 *out)
62 { 62 {
63 struct xxhash64_tfm_ctx *tctx = crypto 63 struct xxhash64_tfm_ctx *tctx = crypto_shash_ctx(desc->tfm);
64 64
65 put_unaligned_le64(xxh64(data, length, 65 put_unaligned_le64(xxh64(data, length, tctx->seed), out);
66 66
67 return 0; 67 return 0;
68 } 68 }
69 69
70 static struct shash_alg alg = { 70 static struct shash_alg alg = {
71 .digestsize = XXHASH64_DIGEST_SIZE 71 .digestsize = XXHASH64_DIGEST_SIZE,
72 .setkey = xxhash64_setkey, 72 .setkey = xxhash64_setkey,
73 .init = xxhash64_init, 73 .init = xxhash64_init,
74 .update = xxhash64_update, 74 .update = xxhash64_update,
75 .final = xxhash64_final, 75 .final = xxhash64_final,
76 .digest = xxhash64_digest, 76 .digest = xxhash64_digest,
77 .descsize = sizeof(struct xxhash 77 .descsize = sizeof(struct xxhash64_desc_ctx),
78 .base = { 78 .base = {
79 .cra_name = "xxhash64", 79 .cra_name = "xxhash64",
80 .cra_driver_name = "xxhash64-g 80 .cra_driver_name = "xxhash64-generic",
81 .cra_priority = 100, 81 .cra_priority = 100,
82 .cra_flags = CRYPTO_ALG_ 82 .cra_flags = CRYPTO_ALG_OPTIONAL_KEY,
83 .cra_blocksize = XXHASH64_BL 83 .cra_blocksize = XXHASH64_BLOCK_SIZE,
84 .cra_ctxsize = sizeof(stru 84 .cra_ctxsize = sizeof(struct xxhash64_tfm_ctx),
85 .cra_module = THIS_MODULE 85 .cra_module = THIS_MODULE,
86 } 86 }
87 }; 87 };
88 88
89 static int __init xxhash_mod_init(void) 89 static int __init xxhash_mod_init(void)
90 { 90 {
91 return crypto_register_shash(&alg); 91 return crypto_register_shash(&alg);
92 } 92 }
93 93
94 static void __exit xxhash_mod_fini(void) 94 static void __exit xxhash_mod_fini(void)
95 { 95 {
96 crypto_unregister_shash(&alg); 96 crypto_unregister_shash(&alg);
97 } 97 }
98 98
99 subsys_initcall(xxhash_mod_init); 99 subsys_initcall(xxhash_mod_init);
100 module_exit(xxhash_mod_fini); 100 module_exit(xxhash_mod_fini);
101 101
102 MODULE_AUTHOR("Nikolay Borisov <nborisov@suse. 102 MODULE_AUTHOR("Nikolay Borisov <nborisov@suse.com>");
103 MODULE_DESCRIPTION("xxhash calculations wrappe 103 MODULE_DESCRIPTION("xxhash calculations wrapper for lib/xxhash.c");
104 MODULE_LICENSE("GPL"); 104 MODULE_LICENSE("GPL");
105 MODULE_ALIAS_CRYPTO("xxhash64"); 105 MODULE_ALIAS_CRYPTO("xxhash64");
106 MODULE_ALIAS_CRYPTO("xxhash64-generic"); 106 MODULE_ALIAS_CRYPTO("xxhash64-generic");
107 107
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.