xref: /freebsd/sys/crypto/openssl/ossl_aarch64.c (revision 66df505066f51e6d8411b966765d828817f88971)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3  *
4  * Copyright (c) 2020 The FreeBSD Foundation
5  *
6  * This software was developed by Mitchell Horne <mhorne@FreeBSD.org>
7  * under sponsorship from the FreeBSD Foundation.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  *
30  * $FreeBSD$
31  */
32 
33 #include <sys/types.h>
34 
35 #include <machine/elf.h>
36 #include <machine/md_var.h>
37 
38 #include <crypto/openssl/ossl.h>
39 #include <crypto/openssl/ossl_cipher.h>
40 #include <crypto/openssl/aarch64/arm_arch.h>
41 
42 /*
43  * Feature bits defined in arm_arch.h
44  */
45 unsigned int OPENSSL_armcap_P;
46 
47 ossl_cipher_setkey_t aes_v8_set_encrypt_key;
48 ossl_cipher_setkey_t aes_v8_set_decrypt_key;
49 
50 ossl_cipher_setkey_t vpaes_set_encrypt_key;
51 ossl_cipher_setkey_t vpaes_set_decrypt_key;
52 
53 void
54 ossl_cpuid(struct ossl_softc *sc)
55 {
56 	/* SHA features */
57 	if ((elf_hwcap & HWCAP_SHA1) != 0)
58 		OPENSSL_armcap_P |= ARMV8_SHA1;
59 	if ((elf_hwcap & HWCAP_SHA2) != 0)
60 		OPENSSL_armcap_P |= ARMV8_SHA256;
61 	if ((elf_hwcap & HWCAP_SHA512) != 0)
62 		OPENSSL_armcap_P |= ARMV8_SHA512;
63 
64 	/* AES features */
65 	if ((elf_hwcap & HWCAP_AES) != 0)
66 		OPENSSL_armcap_P |= ARMV8_AES;
67 	if ((elf_hwcap & HWCAP_PMULL) != 0)
68 		OPENSSL_armcap_P |= ARMV8_PMULL;
69 
70 	if ((OPENSSL_armcap_P & ARMV8_AES) == 0 &&
71 	    (OPENSSL_armcap_P & ARMV7_NEON) == 0) {
72 		sc->has_aes = false;
73 		return;
74 	}
75 	sc->has_aes = true;
76 	if (OPENSSL_armcap_P & ARMV8_AES) {
77 		ossl_cipher_aes_cbc.set_encrypt_key = aes_v8_set_encrypt_key;
78 		ossl_cipher_aes_cbc.set_decrypt_key = aes_v8_set_decrypt_key;
79 	} else {
80 		ossl_cipher_aes_cbc.set_encrypt_key = vpaes_set_encrypt_key;
81 		ossl_cipher_aes_cbc.set_decrypt_key = vpaes_set_decrypt_key;
82 	}
83 }
84