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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/crypto/openssl/ossl_aarch64.c
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/*-

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 * SPDX-License-Identifier: BSD-2-Clause

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 *

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 * Copyright (c) 2020 The FreeBSD Foundation

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 *

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 * This software was developed by Mitchell Horne <[email protected]>

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 * under sponsorship from the FreeBSD Foundation.

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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#include <sys/types.h>

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#include <machine/elf.h>

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#include <machine/md_var.h>

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#include <crypto/openssl/ossl.h>

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#include <crypto/openssl/ossl_cipher.h>

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#include <crypto/openssl/arm_arch.h>

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/*

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 * Feature bits defined in arm_arch.h

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 */

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unsigned int OPENSSL_armcap_P;

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ossl_cipher_setkey_t aes_v8_set_encrypt_key;

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ossl_cipher_setkey_t aes_v8_set_decrypt_key;

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ossl_cipher_setkey_t vpaes_set_encrypt_key;

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ossl_cipher_setkey_t vpaes_set_decrypt_key;

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void

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ossl_cpuid(struct ossl_softc *sc)

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{

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	/* SHA features */

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	if ((elf_hwcap & HWCAP_SHA1) != 0)

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		OPENSSL_armcap_P |= ARMV8_SHA1;

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	if ((elf_hwcap & HWCAP_SHA2) != 0)

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		OPENSSL_armcap_P |= ARMV8_SHA256;

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	if ((elf_hwcap & HWCAP_SHA512) != 0)

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		OPENSSL_armcap_P |= ARMV8_SHA512;

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	/* AES features */

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	if ((elf_hwcap & HWCAP_AES) != 0)

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		OPENSSL_armcap_P |= ARMV8_AES;

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	if ((elf_hwcap & HWCAP_PMULL) != 0)

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		OPENSSL_armcap_P |= ARMV8_PMULL;

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	if ((OPENSSL_armcap_P & ARMV8_AES) == 0 &&

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	    (OPENSSL_armcap_P & ARMV7_NEON) == 0) {

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		sc->has_aes = false;

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		return;

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	}

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	sc->has_aes = true;

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	if (OPENSSL_armcap_P & ARMV8_AES) {

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		ossl_cipher_aes_cbc.set_encrypt_key = aes_v8_set_encrypt_key;

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		ossl_cipher_aes_cbc.set_decrypt_key = aes_v8_set_decrypt_key;

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	} else {

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		ossl_cipher_aes_cbc.set_encrypt_key = vpaes_set_encrypt_key;

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		ossl_cipher_aes_cbc.set_decrypt_key = vpaes_set_decrypt_key;

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	}

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}

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