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#ifndef _WIN32
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
/* it's really stupid that there isn't a syscall for this */
static int ed25519_random_fd = -1;
static inline void ed25519_randombytes(unsigned char *x,unsigned long long xlen)
{
int i;
if (ed25519_random_fd == -1) {
for (;;) {
ed25519_random_fd = open("/dev/urandom",O_RDONLY);
if (ed25519_random_fd != -1) break;
sleep(1);
}
}
while (xlen > 0) {
if (xlen < 1048576) i = xlen; else i = 1048576;
i = read(ed25519_random_fd,x,i);
if (i < 1) {
sleep(1);
continue;
}
x += i;
xlen -= i;
}
}
#else
#include <windows.h>
#include <wincrypt.h>
static inline void ed25519_randombytes(unsigned char *x,unsigned long long xlen)
{
HCRYPTPROV prov = 0;
CryptAcquireContextW(&prov, NULL, NULL,
PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_SILENT);
CryptGenRandom(prov, xlen, x);
CryptReleaseContext(prov, 0);
}
#endif /* _WIN32 */
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