2 * sm3-ce-glue.c - SM3 secure hash using ARMv8.2 Crypto Extensions
4 * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
13 #include <asm/unaligned.h>
14 #include <crypto/internal/hash.h>
15 #include <crypto/internal/simd.h>
16 #include <crypto/sm3.h>
17 #include <crypto/sm3_base.h>
18 #include <linux/cpufeature.h>
19 #include <linux/crypto.h>
20 #include <linux/module.h>
22 MODULE_DESCRIPTION("SM3 secure hash using ARMv8 Crypto Extensions");
23 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
24 MODULE_LICENSE("GPL v2");
26 asmlinkage void sm3_ce_transform(struct sm3_state *sst, u8 const *src,
29 static int sm3_ce_update(struct shash_desc *desc, const u8 *data,
32 if (!crypto_simd_usable())
33 return crypto_sm3_update(desc, data, len);
36 sm3_base_do_update(desc, data, len, sm3_ce_transform);
42 static int sm3_ce_final(struct shash_desc *desc, u8 *out)
44 if (!crypto_simd_usable())
45 return crypto_sm3_finup(desc, NULL, 0, out);
48 sm3_base_do_finalize(desc, sm3_ce_transform);
51 return sm3_base_finish(desc, out);
54 static int sm3_ce_finup(struct shash_desc *desc, const u8 *data,
55 unsigned int len, u8 *out)
57 if (!crypto_simd_usable())
58 return crypto_sm3_finup(desc, data, len, out);
61 sm3_base_do_update(desc, data, len, sm3_ce_transform);
64 return sm3_ce_final(desc, out);
67 static struct shash_alg sm3_alg = {
68 .digestsize = SM3_DIGEST_SIZE,
69 .init = sm3_base_init,
70 .update = sm3_ce_update,
71 .final = sm3_ce_final,
72 .finup = sm3_ce_finup,
73 .descsize = sizeof(struct sm3_state),
74 .base.cra_name = "sm3",
75 .base.cra_driver_name = "sm3-ce",
76 .base.cra_blocksize = SM3_BLOCK_SIZE,
77 .base.cra_module = THIS_MODULE,
78 .base.cra_priority = 200,
81 static int __init sm3_ce_mod_init(void)
83 return crypto_register_shash(&sm3_alg);
86 static void __exit sm3_ce_mod_fini(void)
88 crypto_unregister_shash(&sm3_alg);
91 module_cpu_feature_match(SM3, sm3_ce_mod_init);
92 module_exit(sm3_ce_mod_fini);