41 lines
No EOL
1 KiB
C
41 lines
No EOL
1 KiB
C
// SPDX-License-Identifier: AGPL-1.0-only
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// Copyright (C) 2018 Ludvig Strigeus <info@tunsafe.com>. All Rights Reserved.
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#ifndef TUNSAFE_CRYPTO_OPS_H_
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#define TUNSAFE_CRYPTO_OPS_H_
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#include "build_config.h"
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#include "tunsafe_types.h"
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#include <string.h>
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#if defined(COMPILER_MSVC)
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#include <intrin.h>
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#endif // defined(COMPILER_MSVC)
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#if defined(ARCH_CPU_X86_64) && defined(COMPILER_MSVC)
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FORCEINLINE static void memzero_crypto(void *dst, size_t n) {
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if (n & 7) {
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__stosb((unsigned char*)dst, 0, n);
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} else {
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__stosq((uint64*)dst, 0, n >> 3);
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}
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}
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#elif defined(ARCH_CPU_X86) && defined(COMPILER_MSVC)
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FORCEINLINE static void memzero_crypto(void *dst, size_t n) {
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if (n & 3) {
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__stosb((unsigned char*)dst, 0, n);
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} else {
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__stosd((unsigned long*)dst, 0, n >> 2);
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}
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}
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#else
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FORCEINLINE static void memzero_crypto(void *dst, size_t n) {
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memset(dst, 0, n);
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__asm__ __volatile__("": :"r"(dst) :"memory");
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}
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#endif
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int memcmp_crypto(const uint8 *a, const uint8 *b, size_t n);
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#endif // TUNSAFE_CRYPTO_OPS_H_
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