1 /* SPDX-License-Identifier: GPL-2.0 */
3 * sha3-ce-glue.c - core SHA-3 transform using v8.2 Crypto Extensions
5 * Copyright (C) 2018 Linaro Ltd <ard.biesheuvel@linaro.org>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
12 #include <asm/hwcap.h>
15 #include <asm/unaligned.h>
16 #include <crypto/internal/hash.h>
17 #include <crypto/internal/simd.h>
18 #include <crypto/sha3.h>
19 #include <linux/cpufeature.h>
20 #include <linux/crypto.h>
21 #include <linux/module.h>
23 MODULE_DESCRIPTION("SHA3 secure hash using ARMv8 Crypto Extensions");
24 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
25 MODULE_LICENSE("GPL v2");
26 MODULE_ALIAS_CRYPTO("sha3-224");
27 MODULE_ALIAS_CRYPTO("sha3-256");
28 MODULE_ALIAS_CRYPTO("sha3-384");
29 MODULE_ALIAS_CRYPTO("sha3-512");
31 asmlinkage int sha3_ce_transform(u64 *st, const u8 *data, int blocks,
34 static int sha3_update(struct shash_desc *desc, const u8 *data,
37 struct sha3_state *sctx = shash_desc_ctx(desc);
38 unsigned int digest_size = crypto_shash_digestsize(desc->tfm);
40 if (!crypto_simd_usable())
41 return crypto_sha3_update(desc, data, len);
43 if ((sctx->partial + len) >= sctx->rsiz) {
47 int p = sctx->rsiz - sctx->partial;
49 memcpy(sctx->buf + sctx->partial, data, p);
51 sha3_ce_transform(sctx->st, sctx->buf, 1, digest_size);
59 blocks = len / sctx->rsiz;
66 rem = sha3_ce_transform(sctx->st, data, blocks,
69 data += (blocks - rem) * sctx->rsiz;
75 memcpy(sctx->buf + sctx->partial, data, len);
81 static int sha3_final(struct shash_desc *desc, u8 *out)
83 struct sha3_state *sctx = shash_desc_ctx(desc);
84 unsigned int digest_size = crypto_shash_digestsize(desc->tfm);
85 __le64 *digest = (__le64 *)out;
88 if (!crypto_simd_usable())
89 return crypto_sha3_final(desc, out);
91 sctx->buf[sctx->partial++] = 0x06;
92 memset(sctx->buf + sctx->partial, 0, sctx->rsiz - sctx->partial);
93 sctx->buf[sctx->rsiz - 1] |= 0x80;
96 sha3_ce_transform(sctx->st, sctx->buf, 1, digest_size);
99 for (i = 0; i < digest_size / 8; i++)
100 put_unaligned_le64(sctx->st[i], digest++);
103 put_unaligned_le32(sctx->st[i], (__le32 *)digest);
105 memzero_explicit(sctx, sizeof(*sctx));
109 static struct shash_alg algs[] = { {
110 .digestsize = SHA3_224_DIGEST_SIZE,
111 .init = crypto_sha3_init,
112 .update = sha3_update,
114 .descsize = sizeof(struct sha3_state),
115 .base.cra_name = "sha3-224",
116 .base.cra_driver_name = "sha3-224-ce",
117 .base.cra_blocksize = SHA3_224_BLOCK_SIZE,
118 .base.cra_module = THIS_MODULE,
119 .base.cra_priority = 200,
121 .digestsize = SHA3_256_DIGEST_SIZE,
122 .init = crypto_sha3_init,
123 .update = sha3_update,
125 .descsize = sizeof(struct sha3_state),
126 .base.cra_name = "sha3-256",
127 .base.cra_driver_name = "sha3-256-ce",
128 .base.cra_blocksize = SHA3_256_BLOCK_SIZE,
129 .base.cra_module = THIS_MODULE,
130 .base.cra_priority = 200,
132 .digestsize = SHA3_384_DIGEST_SIZE,
133 .init = crypto_sha3_init,
134 .update = sha3_update,
136 .descsize = sizeof(struct sha3_state),
137 .base.cra_name = "sha3-384",
138 .base.cra_driver_name = "sha3-384-ce",
139 .base.cra_blocksize = SHA3_384_BLOCK_SIZE,
140 .base.cra_module = THIS_MODULE,
141 .base.cra_priority = 200,
143 .digestsize = SHA3_512_DIGEST_SIZE,
144 .init = crypto_sha3_init,
145 .update = sha3_update,
147 .descsize = sizeof(struct sha3_state),
148 .base.cra_name = "sha3-512",
149 .base.cra_driver_name = "sha3-512-ce",
150 .base.cra_blocksize = SHA3_512_BLOCK_SIZE,
151 .base.cra_module = THIS_MODULE,
152 .base.cra_priority = 200,
155 static int __init sha3_neon_mod_init(void)
157 return crypto_register_shashes(algs, ARRAY_SIZE(algs));
160 static void __exit sha3_neon_mod_fini(void)
162 crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
165 module_cpu_feature_match(SHA3, sha3_neon_mod_init);
166 module_exit(sha3_neon_mod_fini);