1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Scalar AES core transform |
4 | * |
5 | * Copyright (C) 2017 Linaro Ltd <ard.biesheuvel@linaro.org> |
6 | */ |
7 | |
8 | #include <crypto/aes.h> |
9 | #include <crypto/algapi.h> |
10 | #include <linux/module.h> |
11 | |
12 | asmlinkage void __aes_arm64_encrypt(u32 *rk, u8 *out, const u8 *in, int rounds); |
13 | asmlinkage void __aes_arm64_decrypt(u32 *rk, u8 *out, const u8 *in, int rounds); |
14 | |
15 | static void aes_arm64_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
16 | { |
17 | struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm); |
18 | int rounds = 6 + ctx->key_length / 4; |
19 | |
20 | __aes_arm64_encrypt(rk: ctx->key_enc, out, in, rounds); |
21 | } |
22 | |
23 | static void aes_arm64_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
24 | { |
25 | struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm); |
26 | int rounds = 6 + ctx->key_length / 4; |
27 | |
28 | __aes_arm64_decrypt(rk: ctx->key_dec, out, in, rounds); |
29 | } |
30 | |
31 | static struct crypto_alg aes_alg = { |
32 | .cra_name = "aes" , |
33 | .cra_driver_name = "aes-arm64" , |
34 | .cra_priority = 200, |
35 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
36 | .cra_blocksize = AES_BLOCK_SIZE, |
37 | .cra_ctxsize = sizeof(struct crypto_aes_ctx), |
38 | .cra_module = THIS_MODULE, |
39 | |
40 | .cra_cipher.cia_min_keysize = AES_MIN_KEY_SIZE, |
41 | .cra_cipher.cia_max_keysize = AES_MAX_KEY_SIZE, |
42 | .cra_cipher.cia_setkey = crypto_aes_set_key, |
43 | .cra_cipher.cia_encrypt = aes_arm64_encrypt, |
44 | .cra_cipher.cia_decrypt = aes_arm64_decrypt |
45 | }; |
46 | |
47 | static int __init aes_init(void) |
48 | { |
49 | return crypto_register_alg(alg: &aes_alg); |
50 | } |
51 | |
52 | static void __exit aes_fini(void) |
53 | { |
54 | crypto_unregister_alg(alg: &aes_alg); |
55 | } |
56 | |
57 | module_init(aes_init); |
58 | module_exit(aes_fini); |
59 | |
60 | MODULE_DESCRIPTION("Scalar AES cipher for arm64" ); |
61 | MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>" ); |
62 | MODULE_LICENSE("GPL v2" ); |
63 | MODULE_ALIAS_CRYPTO("aes" ); |
64 | |