cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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aes-cipher-glue.c (1712B)

      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 <linux/crypto.h>
     10#include <linux/module.h>
     11
     12asmlinkage void __aes_arm64_encrypt(u32 *rk, u8 *out, const u8 *in, int rounds);
     13asmlinkage void __aes_arm64_decrypt(u32 *rk, u8 *out, const u8 *in, int rounds);
     14
     15static 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(ctx->key_enc, out, in, rounds);
     21}
     22
     23static 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(ctx->key_dec, out, in, rounds);
     29}
     30
     31static 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
     47static int __init aes_init(void)
     48{
     49	return crypto_register_alg(&aes_alg);
     50}
     51
     52static void __exit aes_fini(void)
     53{
     54	crypto_unregister_alg(&aes_alg);
     55}
     56
     57module_init(aes_init);
     58module_exit(aes_fini);
     59
     60MODULE_DESCRIPTION("Scalar AES cipher for arm64");
     61MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
     62MODULE_LICENSE("GPL v2");
     63MODULE_ALIAS_CRYPTO("aes");