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/*
* Copyright (C) 2016 Red Hat, Inc.
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GnuTLS.
*
* The GnuTLS is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>
*
*/
/*
* The following code is an implementation of the AES-128-CBC cipher
* using intel's AES instruction set.
*/
#include "errors.h"
#include "gnutls_int.h"
#include <gnutls/crypto.h>
#include "errors.h"
#ifdef HAVE_LIBNETTLE
# include <nettle/aes.h> /* for key generation in 192 and 256 bits */
# include "sha-aarch64.h"
# include "aes-aarch64.h"
#endif
#include "aarch64-common.h"
#ifdef HAVE_GETAUXVAL
# include <sys/auxv.h>
# ifdef AT_HWCAP
# define USE_AUXVAL
# endif
#endif
#if defined(__GNUC__)
__attribute__((visibility("hidden")))
#elif defined(__SUNPRO_C)
__hidden
#endif
unsigned int _gnutls_arm_cpuid_s = 0;
/* Our internal bit-string for cpu capabilities. Should be set
* in GNUTLS_CPUID_OVERRIDE */
#define EMPTY_SET 1
static void capabilities_to_cpuid(unsigned capabilities)
{
_gnutls_arm_cpuid_s = 0;
if (capabilities & EMPTY_SET)
return;
_gnutls_arm_cpuid_s |= capabilities;
}
/* Correspond to asm/hwcap.h for aarch64 */
#ifdef USE_AUXVAL
#define HWCAP_ASIMD (1 << 1)
#define HWCAP_AES (1 << 3)
#define HWCAP_PMULL (1 << 4)
#define HWCAP_SHA1 (1 << 5)
#define HWCAP_SHA2 (1 << 6)
#define HWCAP_SHA3 (1 << 17)
#define HWCAP_SHA512 (1 << 21)
#endif
static void discover_caps(unsigned int *caps)
{
#ifdef USE_AUXVAL
unsigned long c;
c = getauxval(AT_HWCAP);
if (c & HWCAP_ASIMD)
*caps |= ARMV7_NEON;
if (c & HWCAP_AES)
*caps |= ARMV8_AES;
if (c & HWCAP_PMULL)
*caps |= ARMV8_PMULL;
if (c & HWCAP_SHA1)
*caps |= ARMV8_SHA1;
if (c & HWCAP_SHA2)
*caps |= ARMV8_SHA256;
if (c & HWCAP_SHA512)
*caps |= ARMV8_SHA512;
#endif
}
static
void _register_aarch64_crypto(unsigned capabilities)
{
int ret;
if (capabilities == 0) {
discover_caps(&_gnutls_arm_cpuid_s);
} else {
capabilities_to_cpuid(capabilities);
}
if (_gnutls_arm_cpuid_s & ARMV8_SHA1) {
_gnutls_debug_log("Aarch64 SHA1 was detected\n");
ret =
gnutls_crypto_single_digest_register(GNUTLS_DIG_SHA1,
80,
&_gnutls_sha_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
ret =
gnutls_crypto_single_mac_register
(GNUTLS_MAC_SHA1, 80, &_gnutls_hmac_sha_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
}
if (_gnutls_arm_cpuid_s & ARMV8_SHA256) {
_gnutls_debug_log("Aarch64 SHA2 was detected\n");
ret =
gnutls_crypto_single_digest_register(GNUTLS_DIG_SHA224,
80,
&_gnutls_sha_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
ret =
gnutls_crypto_single_mac_register
(GNUTLS_MAC_SHA224, 80, &_gnutls_hmac_sha_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
ret =
gnutls_crypto_single_digest_register(GNUTLS_DIG_SHA256,
80,
&_gnutls_sha_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
ret =
gnutls_crypto_single_mac_register
(GNUTLS_MAC_SHA256, 80, &_gnutls_hmac_sha_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
ret =
gnutls_crypto_single_digest_register(GNUTLS_DIG_SHA384,
80,
&_gnutls_sha_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
ret =
gnutls_crypto_single_mac_register
(GNUTLS_MAC_SHA384, 80, &_gnutls_hmac_sha_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
ret =
gnutls_crypto_single_digest_register(GNUTLS_DIG_SHA512,
80,
&_gnutls_sha_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
ret =
gnutls_crypto_single_mac_register
(GNUTLS_MAC_SHA512, 80, &_gnutls_hmac_sha_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
}
if (_gnutls_arm_cpuid_s & ARMV8_AES) {
_gnutls_debug_log("Aarch64 AES was detected\n");
if (_gnutls_arm_cpuid_s & ARMV8_PMULL) {
_gnutls_debug_log("Aarch64 PMULL was detected\n");
ret =
gnutls_crypto_single_cipher_register
(GNUTLS_CIPHER_AES_128_GCM, 90,
&_gnutls_aes_gcm_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
ret =
gnutls_crypto_single_cipher_register
(GNUTLS_CIPHER_AES_256_GCM, 90,
&_gnutls_aes_gcm_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
}
ret =
gnutls_crypto_single_cipher_register
(GNUTLS_CIPHER_AES_128_CBC, 90, &_gnutls_aes_cbc_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
ret =
gnutls_crypto_single_cipher_register
(GNUTLS_CIPHER_AES_256_CBC, 90, &_gnutls_aes_cbc_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
ret =
gnutls_crypto_single_cipher_register
(GNUTLS_CIPHER_AES_128_CCM, 90, &_gnutls_aes_ccm_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
ret =
gnutls_crypto_single_cipher_register
(GNUTLS_CIPHER_AES_256_CCM, 90, &_gnutls_aes_ccm_aarch64, 0);
if (ret < 0) {
gnutls_assert();
}
}
return;
}
void register_aarch64_crypto(void)
{
unsigned capabilities = 0;
char *p;
p = secure_getenv("GNUTLS_CPUID_OVERRIDE");
if (p) {
capabilities = strtol(p, NULL, 0);
}
_register_aarch64_crypto(capabilities);
}
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