70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
/* Copyright 2015, Kenneth MacKay. Licensed under the BSD 2-clause license. */
|
|
|
|
#ifndef _UECC_PLATFORM_SPECIFIC_H_
|
|
#define _UECC_PLATFORM_SPECIFIC_H_
|
|
|
|
#include "types.h"
|
|
|
|
#if (defined(_WIN32) || defined(_WIN64))
|
|
/* Windows */
|
|
|
|
// use pragma syntax to prevent tweaking the linker script for getting CryptXYZ function
|
|
#pragma comment(lib, "crypt32.lib")
|
|
#pragma comment(lib, "advapi32.lib")
|
|
|
|
#define WIN32_LEAN_AND_MEAN
|
|
#include <windows.h>
|
|
#include <wincrypt.h>
|
|
|
|
static int default_RNG(uint8_t *dest, unsigned size) {
|
|
HCRYPTPROV prov;
|
|
if (!CryptAcquireContext(&prov, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) {
|
|
return 0;
|
|
}
|
|
|
|
CryptGenRandom(prov, size, (BYTE *)dest);
|
|
CryptReleaseContext(prov, 0);
|
|
return 1;
|
|
}
|
|
#define default_RNG_defined 1
|
|
|
|
#elif (defined(__linux__) && (__GLIBC__ > 2 || __GLIBC_MINOR__ > 24)) || (defined __sun)
|
|
/* Linux and Solaris */
|
|
|
|
#include <sys/random.h>
|
|
static int default_RNG(uint8_t* dest, unsigned size) {
|
|
ssize_t nb_written = getrandom(dest, size, 0);
|
|
return ((nb_written == size) ? 1 : 0);
|
|
}
|
|
#define default_RNG_defined 1
|
|
|
|
#elif defined (__linux__) /* No glibc */
|
|
#define _GNU_SOURCE
|
|
#include <unistd.h>
|
|
#include <sys/syscall.h>
|
|
static int default_RNG(uint8_t* dest, unsigned size) {
|
|
int ret;
|
|
ret = syscall(SYS_getrandom, dest, size, 0);
|
|
if (ret != size)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
#define default_RNG_defined 1
|
|
|
|
#elif defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
|
|
#include <sys/param.h>
|
|
#if defined(BSD)
|
|
/* OSX and BSDs */
|
|
|
|
#include <stdlib.h>
|
|
static int default_RNG(uint8_t* dest, unsigned size) {
|
|
arc4random_buf(dest, size);
|
|
return 1;
|
|
}
|
|
#define default_RNG_defined 1
|
|
#endif /* defined(BSD) */
|
|
|
|
#endif /* platform */
|
|
|
|
#endif /* _UECC_PLATFORM_SPECIFIC_H_ */
|