cjdns/node_build/dependencies/cnacl/randombytes/CryptGenRandom.c

#include <windows.h>
#include <wincrypt.h>
#include <process.h>
#include <assert.h>

void randombytes(unsigned char *x,unsigned long long xlen)
{
	static int provider_set = 0;
	static HCRYPTPROV provider;

	if (!provider_set) {
		if (!CryptAcquireContext(&provider, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) {
			if (GetLastError() != (DWORD)NTE_BAD_KEYSET) {
				assert(0);
            }
		}
		provider_set = 1;
	}
	if (!CryptGenRandom(provider, xlen, x)) {
		assert(0);
    }
}