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14386d4713
The helper crypto_tfm_ctx is only used by the Crypto API algorithm code and should really be in algapi.h. However, for historical reasons many files relied on it to be in crypto.h. This patch changes those files to use algapi.h instead in prepartion for a move. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Scalar fixed time AES core transform
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*
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* Copyright (C) 2017 Linaro Ltd <ard.biesheuvel@linaro.org>
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*/
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#include <crypto/aes.h>
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#include <crypto/algapi.h>
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#include <linux/module.h>
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static int aesti_set_key(struct crypto_tfm *tfm, const u8 *in_key,
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unsigned int key_len)
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{
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struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
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return aes_expandkey(ctx, in_key, key_len);
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}
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static void aesti_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
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{
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const struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
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unsigned long flags;
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/*
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* Temporarily disable interrupts to avoid races where cachelines are
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* evicted when the CPU is interrupted to do something else.
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*/
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local_irq_save(flags);
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aes_encrypt(ctx, out, in);
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local_irq_restore(flags);
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}
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static void aesti_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
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{
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const struct crypto_aes_ctx *ctx = crypto_tfm_ctx(tfm);
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unsigned long flags;
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/*
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* Temporarily disable interrupts to avoid races where cachelines are
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* evicted when the CPU is interrupted to do something else.
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*/
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local_irq_save(flags);
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aes_decrypt(ctx, out, in);
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local_irq_restore(flags);
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}
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static struct crypto_alg aes_alg = {
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.cra_name = "aes",
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.cra_driver_name = "aes-fixed-time",
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.cra_priority = 100 + 1,
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.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_ctxsize = sizeof(struct crypto_aes_ctx),
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.cra_module = THIS_MODULE,
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.cra_cipher.cia_min_keysize = AES_MIN_KEY_SIZE,
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.cra_cipher.cia_max_keysize = AES_MAX_KEY_SIZE,
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.cra_cipher.cia_setkey = aesti_set_key,
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.cra_cipher.cia_encrypt = aesti_encrypt,
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.cra_cipher.cia_decrypt = aesti_decrypt
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};
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static int __init aes_init(void)
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{
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return crypto_register_alg(&aes_alg);
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}
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static void __exit aes_fini(void)
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{
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crypto_unregister_alg(&aes_alg);
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}
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module_init(aes_init);
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module_exit(aes_fini);
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MODULE_DESCRIPTION("Generic fixed time AES");
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MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
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MODULE_LICENSE("GPL v2");
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