1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * sha512-glue.c - accelerated SHA-384/512 for ARM
4 *
5 * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
6 */
7
8 #include <crypto/internal/hash.h>
9 #include <crypto/sha2.h>
10 #include <crypto/sha512_base.h>
11 #include <linux/crypto.h>
12 #include <linux/module.h>
13
14 #include <asm/hwcap.h>
15 #include <asm/neon.h>
16
17 #include "sha512.h"
18
19 MODULE_DESCRIPTION("Accelerated SHA-384/SHA-512 secure hash for ARM");
20 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
21 MODULE_LICENSE("GPL v2");
22
23 MODULE_ALIAS_CRYPTO("sha384");
24 MODULE_ALIAS_CRYPTO("sha512");
25 MODULE_ALIAS_CRYPTO("sha384-arm");
26 MODULE_ALIAS_CRYPTO("sha512-arm");
27
28 asmlinkage void sha512_block_data_order(u64 *state, u8 const *src, int blocks);
29
sha512_arm_update(struct shash_desc * desc,const u8 * data,unsigned int len)30 int sha512_arm_update(struct shash_desc *desc, const u8 *data,
31 unsigned int len)
32 {
33 return sha512_base_do_update(desc, data, len,
34 (sha512_block_fn *)sha512_block_data_order);
35 }
36
sha512_arm_final(struct shash_desc * desc,u8 * out)37 static int sha512_arm_final(struct shash_desc *desc, u8 *out)
38 {
39 sha512_base_do_finalize(desc,
40 (sha512_block_fn *)sha512_block_data_order);
41 return sha512_base_finish(desc, out);
42 }
43
sha512_arm_finup(struct shash_desc * desc,const u8 * data,unsigned int len,u8 * out)44 int sha512_arm_finup(struct shash_desc *desc, const u8 *data,
45 unsigned int len, u8 *out)
46 {
47 sha512_base_do_update(desc, data, len,
48 (sha512_block_fn *)sha512_block_data_order);
49 return sha512_arm_final(desc, out);
50 }
51
52 static struct shash_alg sha512_arm_algs[] = { {
53 .init = sha384_base_init,
54 .update = sha512_arm_update,
55 .final = sha512_arm_final,
56 .finup = sha512_arm_finup,
57 .descsize = sizeof(struct sha512_state),
58 .digestsize = SHA384_DIGEST_SIZE,
59 .base = {
60 .cra_name = "sha384",
61 .cra_driver_name = "sha384-arm",
62 .cra_priority = 250,
63 .cra_blocksize = SHA512_BLOCK_SIZE,
64 .cra_module = THIS_MODULE,
65 }
66 }, {
67 .init = sha512_base_init,
68 .update = sha512_arm_update,
69 .final = sha512_arm_final,
70 .finup = sha512_arm_finup,
71 .descsize = sizeof(struct sha512_state),
72 .digestsize = SHA512_DIGEST_SIZE,
73 .base = {
74 .cra_name = "sha512",
75 .cra_driver_name = "sha512-arm",
76 .cra_priority = 250,
77 .cra_blocksize = SHA512_BLOCK_SIZE,
78 .cra_module = THIS_MODULE,
79 }
80 } };
81
sha512_arm_mod_init(void)82 static int __init sha512_arm_mod_init(void)
83 {
84 int err;
85
86 err = crypto_register_shashes(sha512_arm_algs,
87 ARRAY_SIZE(sha512_arm_algs));
88 if (err)
89 return err;
90
91 if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon()) {
92 err = crypto_register_shashes(sha512_neon_algs,
93 ARRAY_SIZE(sha512_neon_algs));
94 if (err)
95 goto err_unregister;
96 }
97 return 0;
98
99 err_unregister:
100 crypto_unregister_shashes(sha512_arm_algs,
101 ARRAY_SIZE(sha512_arm_algs));
102
103 return err;
104 }
105
sha512_arm_mod_fini(void)106 static void __exit sha512_arm_mod_fini(void)
107 {
108 crypto_unregister_shashes(sha512_arm_algs,
109 ARRAY_SIZE(sha512_arm_algs));
110 if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && cpu_has_neon())
111 crypto_unregister_shashes(sha512_neon_algs,
112 ARRAY_SIZE(sha512_neon_algs));
113 }
114
115 module_init(sha512_arm_mod_init);
116 module_exit(sha512_arm_mod_fini);
117