mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
synced 2026-04-18 03:23:53 -04:00
fa2297750c
Move the ARM optimized single-block AES en/decryption code into lib/crypto/, wire it up to the AES library API, and remove the superseded "aes-arm" crypto_cipher algorithm. The result is that both the AES library and crypto_cipher APIs are now optimized for ARM, whereas previously only crypto_cipher was (and the optimizations weren't enabled by default, which this fixes as well). Acked-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20260112192035.10427-11-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* AES block cipher, optimized for ARM
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*
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* Copyright (C) 2017 Linaro Ltd.
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* Copyright 2026 Google LLC
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*/
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asmlinkage void __aes_arm_encrypt(const u32 rk[], int rounds,
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const u8 in[AES_BLOCK_SIZE],
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u8 out[AES_BLOCK_SIZE]);
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asmlinkage void __aes_arm_decrypt(const u32 inv_rk[], int rounds,
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const u8 in[AES_BLOCK_SIZE],
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u8 out[AES_BLOCK_SIZE]);
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static void aes_preparekey_arch(union aes_enckey_arch *k,
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union aes_invkey_arch *inv_k,
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const u8 *in_key, int key_len, int nrounds)
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{
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aes_expandkey_generic(k->rndkeys, inv_k ? inv_k->inv_rndkeys : NULL,
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in_key, key_len);
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}
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static void aes_encrypt_arch(const struct aes_enckey *key,
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u8 out[AES_BLOCK_SIZE],
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const u8 in[AES_BLOCK_SIZE])
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{
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if (!IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
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!IS_ALIGNED((uintptr_t)out | (uintptr_t)in, 4)) {
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u8 bounce_buf[AES_BLOCK_SIZE] __aligned(4);
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memcpy(bounce_buf, in, AES_BLOCK_SIZE);
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__aes_arm_encrypt(key->k.rndkeys, key->nrounds, bounce_buf,
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bounce_buf);
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memcpy(out, bounce_buf, AES_BLOCK_SIZE);
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return;
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}
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__aes_arm_encrypt(key->k.rndkeys, key->nrounds, in, out);
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}
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static void aes_decrypt_arch(const struct aes_key *key,
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u8 out[AES_BLOCK_SIZE],
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const u8 in[AES_BLOCK_SIZE])
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{
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if (!IS_ENABLED(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) &&
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!IS_ALIGNED((uintptr_t)out | (uintptr_t)in, 4)) {
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u8 bounce_buf[AES_BLOCK_SIZE] __aligned(4);
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memcpy(bounce_buf, in, AES_BLOCK_SIZE);
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__aes_arm_decrypt(key->inv_k.inv_rndkeys, key->nrounds,
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bounce_buf, bounce_buf);
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memcpy(out, bounce_buf, AES_BLOCK_SIZE);
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return;
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}
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__aes_arm_decrypt(key->inv_k.inv_rndkeys, key->nrounds, in, out);
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}
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