| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Scalar AES core transform |
| * |
| * Copyright (C) 2017 Linaro Ltd. |
| * Author: Ard Biesheuvel <ard.biesheuvel@linaro.org> |
| */ |
| |
| #include <crypto/aes.h> |
| #include <linux/crypto.h> |
| #include <linux/module.h> |
| |
| asmlinkage void __aes_arm_encrypt(u32 *rk, int rounds, const u8 *in, u8 *out); |
| EXPORT_SYMBOL(__aes_arm_encrypt); |
| |
| asmlinkage void __aes_arm_decrypt(u32 *rk, int rounds, const u8 *in, u8 *out); |
| EXPORT_SYMBOL(__aes_arm_decrypt); |
| |
| static void aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
| { |
| struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm); |
| int rounds = 6 + ctx->key_length / 4; |
| |
| __aes_arm_encrypt(ctx->key_enc, rounds, in, out); |
| } |
| |
| static void aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in) |
| { |
| struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm); |
| int rounds = 6 + ctx->key_length / 4; |
| |
| __aes_arm_decrypt(ctx->key_dec, rounds, in, out); |
| } |
| |
| static struct crypto_alg aes_alg = { |
| .cra_name = "aes", |
| .cra_driver_name = "aes-arm", |
| .cra_priority = 200, |
| .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
| .cra_blocksize = AES_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct crypto_aes_ctx), |
| .cra_module = THIS_MODULE, |
| |
| .cra_cipher.cia_min_keysize = AES_MIN_KEY_SIZE, |
| .cra_cipher.cia_max_keysize = AES_MAX_KEY_SIZE, |
| .cra_cipher.cia_setkey = crypto_aes_set_key, |
| .cra_cipher.cia_encrypt = aes_encrypt, |
| .cra_cipher.cia_decrypt = aes_decrypt, |
| |
| #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS |
| .cra_alignmask = 3, |
| #endif |
| }; |
| |
| static int __init aes_init(void) |
| { |
| return crypto_register_alg(&aes_alg); |
| } |
| |
| static void __exit aes_fini(void) |
| { |
| crypto_unregister_alg(&aes_alg); |
| } |
| |
| module_init(aes_init); |
| module_exit(aes_fini); |
| |
| MODULE_DESCRIPTION("Scalar AES cipher for ARM"); |
| MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>"); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_ALIAS_CRYPTO("aes"); |