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