1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * sha1-ce-glue.c - SHA-1 secure hash using ARMv8 Crypto Extensions
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <crypto/internal/hash.h>
9*4882a593Smuzhiyun #include <crypto/internal/simd.h>
10*4882a593Smuzhiyun #include <crypto/sha.h>
11*4882a593Smuzhiyun #include <crypto/sha1_base.h>
12*4882a593Smuzhiyun #include <linux/cpufeature.h>
13*4882a593Smuzhiyun #include <linux/crypto.h>
14*4882a593Smuzhiyun #include <linux/module.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <asm/hwcap.h>
17*4882a593Smuzhiyun #include <asm/neon.h>
18*4882a593Smuzhiyun #include <asm/simd.h>
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #include "sha1.h"
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun MODULE_DESCRIPTION("SHA1 secure hash using ARMv8 Crypto Extensions");
23*4882a593Smuzhiyun MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
24*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun asmlinkage void sha1_ce_transform(struct sha1_state *sst, u8 const *src,
27*4882a593Smuzhiyun int blocks);
28*4882a593Smuzhiyun
sha1_ce_update(struct shash_desc * desc,const u8 * data,unsigned int len)29*4882a593Smuzhiyun static int sha1_ce_update(struct shash_desc *desc, const u8 *data,
30*4882a593Smuzhiyun unsigned int len)
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun struct sha1_state *sctx = shash_desc_ctx(desc);
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun if (!crypto_simd_usable() ||
35*4882a593Smuzhiyun (sctx->count % SHA1_BLOCK_SIZE) + len < SHA1_BLOCK_SIZE)
36*4882a593Smuzhiyun return sha1_update_arm(desc, data, len);
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun kernel_neon_begin();
39*4882a593Smuzhiyun sha1_base_do_update(desc, data, len, sha1_ce_transform);
40*4882a593Smuzhiyun kernel_neon_end();
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun return 0;
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
sha1_ce_finup(struct shash_desc * desc,const u8 * data,unsigned int len,u8 * out)45*4882a593Smuzhiyun static int sha1_ce_finup(struct shash_desc *desc, const u8 *data,
46*4882a593Smuzhiyun unsigned int len, u8 *out)
47*4882a593Smuzhiyun {
48*4882a593Smuzhiyun if (!crypto_simd_usable())
49*4882a593Smuzhiyun return sha1_finup_arm(desc, data, len, out);
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun kernel_neon_begin();
52*4882a593Smuzhiyun if (len)
53*4882a593Smuzhiyun sha1_base_do_update(desc, data, len, sha1_ce_transform);
54*4882a593Smuzhiyun sha1_base_do_finalize(desc, sha1_ce_transform);
55*4882a593Smuzhiyun kernel_neon_end();
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun return sha1_base_finish(desc, out);
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
sha1_ce_final(struct shash_desc * desc,u8 * out)60*4882a593Smuzhiyun static int sha1_ce_final(struct shash_desc *desc, u8 *out)
61*4882a593Smuzhiyun {
62*4882a593Smuzhiyun return sha1_ce_finup(desc, NULL, 0, out);
63*4882a593Smuzhiyun }
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun static struct shash_alg alg = {
66*4882a593Smuzhiyun .init = sha1_base_init,
67*4882a593Smuzhiyun .update = sha1_ce_update,
68*4882a593Smuzhiyun .final = sha1_ce_final,
69*4882a593Smuzhiyun .finup = sha1_ce_finup,
70*4882a593Smuzhiyun .descsize = sizeof(struct sha1_state),
71*4882a593Smuzhiyun .digestsize = SHA1_DIGEST_SIZE,
72*4882a593Smuzhiyun .base = {
73*4882a593Smuzhiyun .cra_name = "sha1",
74*4882a593Smuzhiyun .cra_driver_name = "sha1-ce",
75*4882a593Smuzhiyun .cra_priority = 200,
76*4882a593Smuzhiyun .cra_blocksize = SHA1_BLOCK_SIZE,
77*4882a593Smuzhiyun .cra_module = THIS_MODULE,
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun };
80*4882a593Smuzhiyun
sha1_ce_mod_init(void)81*4882a593Smuzhiyun static int __init sha1_ce_mod_init(void)
82*4882a593Smuzhiyun {
83*4882a593Smuzhiyun return crypto_register_shash(&alg);
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun
sha1_ce_mod_fini(void)86*4882a593Smuzhiyun static void __exit sha1_ce_mod_fini(void)
87*4882a593Smuzhiyun {
88*4882a593Smuzhiyun crypto_unregister_shash(&alg);
89*4882a593Smuzhiyun }
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun module_cpu_feature_match(SHA1, sha1_ce_mod_init);
92*4882a593Smuzhiyun module_exit(sha1_ce_mod_fini);
93