1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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
31 #include <sys/types.h>
32
33 #include <machine/elf.h>
34 #include <machine/md_var.h>
35
36 #include <crypto/openssl/ossl.h>
37 #include <crypto/openssl/ossl_cipher.h>
38 #include <crypto/openssl/arm_arch.h>
39
40 /*
41 * Feature bits defined in arm_arch.h
42 */
43 unsigned int OPENSSL_armcap_P;
44
45 ossl_cipher_setkey_t aes_v8_set_encrypt_key;
46 ossl_cipher_setkey_t aes_v8_set_decrypt_key;
47
48 ossl_cipher_setkey_t vpaes_set_encrypt_key;
49 ossl_cipher_setkey_t vpaes_set_decrypt_key;
50
51 void
ossl_cpuid(struct ossl_softc * sc)52 ossl_cpuid(struct ossl_softc *sc)
53 {
54 /* SHA features */
55 if ((elf_hwcap & HWCAP_SHA1) != 0)
56 OPENSSL_armcap_P |= ARMV8_SHA1;
57 if ((elf_hwcap & HWCAP_SHA2) != 0)
58 OPENSSL_armcap_P |= ARMV8_SHA256;
59 if ((elf_hwcap & HWCAP_SHA512) != 0)
60 OPENSSL_armcap_P |= ARMV8_SHA512;
61
62 /* AES features */
63 if ((elf_hwcap & HWCAP_AES) != 0)
64 OPENSSL_armcap_P |= ARMV8_AES;
65 if ((elf_hwcap & HWCAP_PMULL) != 0)
66 OPENSSL_armcap_P |= ARMV8_PMULL;
67
68 if ((OPENSSL_armcap_P & ARMV8_AES) == 0 &&
69 (OPENSSL_armcap_P & ARMV7_NEON) == 0) {
70 sc->has_aes = false;
71 return;
72 }
73 sc->has_aes = true;
74 if (OPENSSL_armcap_P & ARMV8_AES) {
75 ossl_cipher_aes_cbc.set_encrypt_key = aes_v8_set_encrypt_key;
76 ossl_cipher_aes_cbc.set_decrypt_key = aes_v8_set_decrypt_key;
77 } else {
78 ossl_cipher_aes_cbc.set_encrypt_key = vpaes_set_encrypt_key;
79 ossl_cipher_aes_cbc.set_decrypt_key = vpaes_set_decrypt_key;
80 }
81 }
82