54 lines
977 B
C++
54 lines
977 B
C++
#ifndef RANDOM_H
|
|
#define RANDOM_H
|
|
#include <unistd.h>
|
|
#include <sys/syscall.h>
|
|
#ifdef __linux__
|
|
#include <linux/random.h>
|
|
#endif
|
|
#ifndef SYS_getrandom
|
|
#include <openssl/rand.h>
|
|
#endif
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <string>
|
|
|
|
//dirty hacks
|
|
#ifdef SYS_getrandom
|
|
inline int getrandom(void *buf, size_t buflen, unsigned int flags)
|
|
{
|
|
return syscall(SYS_getrandom, buf, buflen, flags);
|
|
}
|
|
#else
|
|
|
|
#if __linux__
|
|
//ancient linux systems
|
|
#define GRND_NONBLOCK 0
|
|
inline int getrandom(void *buf, size_t buflen, unsigned int flags)
|
|
{
|
|
int result = RAND_bytes(buf, buflen);
|
|
if(result == 1)
|
|
{
|
|
return (int) buflen;
|
|
}
|
|
return -1;
|
|
}
|
|
#endif
|
|
#if __OpenBSD__
|
|
inline int getrandom(void *buf, size_t buflen, unsigned int flags)
|
|
{
|
|
arc4random_buf(buf, buflen);
|
|
return 0;
|
|
}
|
|
#endif
|
|
#endif
|
|
/* TODO: if the >=C++11 prngr are good enough, use them */
|
|
class Random
|
|
{
|
|
public:
|
|
Random();
|
|
std::string getRandomHexString(unsigned int bytes );
|
|
};
|
|
|
|
#endif // RANDOM_H
|