53 lines
1,011 B
C
53 lines
1,011 B
C
|
#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 */
|