197ff4c35b
AES-CBC OpenSSL assembly is used underneath. The glue layer(ossl_aes.c) is based on CHACHA20 implementation. Contrary to the SHA and CHACHA20, AES OpenSSL assembly logic does not have a fallback implementation in case CPU doesn't support required instructions. Because of that CPU caps are checked during initialization and AES support is advertised only if available. The feature is available on all architectures that ossl supports: i386, amd64, arm64. The biggest advantage of this patch over existing solutions (aesni(4) and armv8crypto(4)) is that it supports SHA, allowing for ETA operations. Sponsored by: Stormshield Obtained from: Semihalf Reviewed by: jhb (previous version) Differential revision: https://reviews.freebsd.org/D32099
84 lines
2.8 KiB
C
84 lines
2.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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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 <mhorne@FreeBSD.org>
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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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* $FreeBSD$
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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/aarch64/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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