securemem.h

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#pragma once
 
 
#include <promeki/config.h>
#if PROMEKI_ENABLE_CORE
#include <cstddef>
#include <promeki/namespace.h>
#include <promeki/platform.h>
#include <promeki/error.h>
 
#if defined(PROMEKI_PLATFORM_WINDOWS)
#include <Windows.h>
#include <memoryapi.h>
#elif defined(PROMEKI_PLATFORM_POSIX)
#include <sys/mman.h>
#include <string.h> // explicit_bzero
#endif
 
PROMEKI_NAMESPACE_BEGIN
 
inline void secureZero(void *ptr, size_t size) {
        if (ptr == nullptr || size == 0) return;
#if defined(PROMEKI_PLATFORM_WINDOWS)
        SecureZeroMemory(ptr, size);
#elif defined(PROMEKI_LIBC_GLIBC) &&                                                                                   \
        (PROMEKI_LIBC_GLIBC_VERSION_MAJOR > 2 ||                                                                       \
         (PROMEKI_LIBC_GLIBC_VERSION_MAJOR == 2 && PROMEKI_LIBC_GLIBC_VERSION_MINOR >= 25))
        explicit_bzero(ptr, size);
#elif defined(PROMEKI_PLATFORM_BSD)
        explicit_bzero(ptr, size);
#else
        volatile unsigned char *p = static_cast<volatile unsigned char *>(ptr);
        while (size--) *p++ = 0;
#endif
}
 
Error secureLock(void *ptr, size_t size);
 
Error secureUnlock(void *ptr, size_t size);
 
PROMEKI_NAMESPACE_END
 
#endif // PROMEKI_ENABLE_CORE