55 lines
1.0 KiB
C
Executable File
55 lines
1.0 KiB
C
Executable File
#ifdef _WIN32
|
|
#include <windows.h>
|
|
#else
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#if defined(__cplusplus)
|
|
extern "C"
|
|
{
|
|
#endif
|
|
|
|
#ifdef _WIN32
|
|
int entropy_fun(unsigned char buf[], unsigned int len)
|
|
{
|
|
HCRYPTPROV provider;
|
|
unsigned __int64 pentium_tsc[1];
|
|
unsigned int i;
|
|
int result = 0;
|
|
|
|
|
|
if (CryptAcquireContext(&provider, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_SILENT))
|
|
{
|
|
result = CryptGenRandom(provider, len, buf);
|
|
CryptReleaseContext(provider, 0);
|
|
if (result)
|
|
return len;
|
|
}
|
|
|
|
QueryPerformanceCounter((LARGE_INTEGER *)pentium_tsc);
|
|
|
|
for(i = 0; i < 8 && i < len; ++i)
|
|
buf[i] = ((unsigned char*)pentium_tsc)[i];
|
|
|
|
return i;
|
|
}
|
|
#else
|
|
int entropy_fun(unsigned char buf[], unsigned int len)
|
|
{
|
|
int frand = open("/dev/random", O_RDONLY);
|
|
int rlen = 0;
|
|
if (frand != -1)
|
|
{
|
|
rlen = (int)read(frand, buf, len);
|
|
close(frand);
|
|
}
|
|
return rlen;
|
|
}
|
|
#endif
|
|
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|