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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
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2 | /* |
3 | * Scalar AES core transform | |
4 | * | |
5 | * Copyright (C) 2017 Linaro Ltd <ard.biesheuvel@linaro.org> | |
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6 | */ |
7 | ||
8 | #include <crypto/aes.h> | |
14386d47 | 9 | #include <crypto/algapi.h> |
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10 | #include <linux/module.h> |
11 | ||
12 | asmlinkage void __aes_arm64_encrypt(u32 *rk, u8 *out, const u8 *in, int rounds); | |
bed593c0 | 13 | asmlinkage void __aes_arm64_decrypt(u32 *rk, u8 *out, const u8 *in, int rounds); |
bed593c0 | 14 | |
724ecd3c | 15 | static void aes_arm64_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
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16 | { |
17 | struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm); | |
18 | int rounds = 6 + ctx->key_length / 4; | |
19 | ||
20 | __aes_arm64_encrypt(ctx->key_enc, out, in, rounds); | |
21 | } | |
22 | ||
724ecd3c | 23 | static void aes_arm64_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
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24 | { |
25 | struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm); | |
26 | int rounds = 6 + ctx->key_length / 4; | |
27 | ||
28 | __aes_arm64_decrypt(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, | |
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43 | .cra_cipher.cia_encrypt = aes_arm64_encrypt, |
44 | .cra_cipher.cia_decrypt = aes_arm64_decrypt | |
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45 | }; |
46 | ||
47 | static int __init aes_init(void) | |
48 | { | |
49 | return crypto_register_alg(&aes_alg); | |
50 | } | |
51 | ||
52 | static void __exit aes_fini(void) | |
53 | { | |
54 | crypto_unregister_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"); |