Commit 8a0b8bd8 authored by damienf's avatar damienf

misc/rand.c: actually, windows comes with a particularily comprehensive crypto library

parent 71308486
......@@ -116,28 +116,41 @@ void vlc_rand_bytes (void *buf, size_t len)
}
#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;
/* fill buffer with pseudo-random data */
while (count > 0)
{
unsigned int val;
#if 0
rand_s (&val);
#else
abort();
#endif
if (len < sizeof (val))
{
memcpy (buf, &val, len);
break;
}
val = rand();
if (count < sizeof (val))
{
memcpy (buf, &val, count);
break;
}
memcpy (buf, &val, sizeof (val));
count -= 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
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