Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Scalar fixed time AES core transform
 *
 * Copyright (C) 2017 Linaro Ltd <ard.biesheuvel@linaro.org>
 */
 
#include <crypto/aes.h>
#include <linux/crypto.h>
#include <linux/module.h>
 
static int aesti_set_key(struct crypto_tfm *tfm, const u8 *in_key,
<------><------><------> unsigned int key_len)
{
<------>struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
 
<------>return aes_expandkey(ctx, in_key, key_len);
}
 
static void aesti_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{
<------>const struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
<------>unsigned long flags;
 
<------>/*
<------> * Temporarily disable interrupts to avoid races where cachelines are
<------> * evicted when the CPU is interrupted to do something else.
<------> */
<------>local_irq_save(flags);
 
<------>aes_encrypt(ctx, out, in);
 
<------>local_irq_restore(flags);
}
 
static void aesti_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
{
<------>const struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
<------>unsigned long flags;
 
<------>/*
<------> * Temporarily disable interrupts to avoid races where cachelines are
<------> * evicted when the CPU is interrupted to do something else.
<------> */
<------>local_irq_save(flags);
 
<------>aes_decrypt(ctx, out, in);
 
<------>local_irq_restore(flags);
}
 
static struct crypto_alg aes_alg = {
<------>.cra_name			= "aes",
<------>.cra_driver_name		= "aes-fixed-time",
<------>.cra_priority			= 100 + 1,
<------>.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		= aesti_set_key,
<------>.cra_cipher.cia_encrypt		= aesti_encrypt,
<------>.cra_cipher.cia_decrypt		= aesti_decrypt
};
 
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("Generic fixed time AES");
MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
MODULE_LICENSE("GPL v2");