}
#else /* WIN32 */
-#define _CRT_RAND_S
-#include <stdlib.h>
+
+#include <wincrypt.h>
void vlc_rand_bytes (void *buf, size_t len)
{
- while (len > 0)
+ HCRYPTPROV hProv;
+ size_t count = len;
+ uint8_t *p_buf = (uint8_t *)buf;
+
+ /* fill buffer with pseudo-random data */
+ while (count > 0)
{
unsigned int val;
-#if 0
- rand_s (&val);
-#else
- abort();
-#endif
-
- if (len < sizeof (val))
+ val = rand();
+ if (count < sizeof (val))
{
- memcpy (buf, &val, len);
+ memcpy (p_buf, &val, count);
break;
}
+
+ memcpy (p_buf, &val, sizeof (val));
+ count -= sizeof (val);
+ p_buf += sizeof (val);
+ }
- memcpy (buf, &val, sizeof (val));
- len -= sizeof (val);
+ /* acquire default encryption context */
+ if( CryptAcquireContext(
+ &hProv, // Variable to hold returned handle.
+ NULL, // Use default key container.
+ MS_DEF_PROV, // Use default CSP.
+ PROV_RSA_FULL, // Type of provider to acquire.
+ 0) )
+ {
+ /* fill buffer with pseudo-random data, intial buffer content
+ is used as auxillary random seed */
+ CryptGenRandom(hProv, len, buf);
+ CryptReleaseContext(hProv, 0);
}
}
#endif