mirror of
https://github.com/ish-app/ish.git
synced 2026-01-18 13:57:29 +00:00
31 lines
683 B
C
31 lines
683 B
C
#include <fcntl.h>
|
|
#include "kernel/calls.h"
|
|
|
|
#ifdef __APPLE__
|
|
#include <CommonCrypto/CommonCrypto.h>
|
|
#include <CommonCrypto/CommonRandom.h>
|
|
#else
|
|
#include <unistd.h>
|
|
#include <sys/syscall.h>
|
|
#include <linux/random.h>
|
|
#endif
|
|
|
|
int get_random(char *buf, size_t len) {
|
|
#ifdef __APPLE__
|
|
return CCRandomGenerateBytes(buf, len) != kCCSuccess;
|
|
#else
|
|
return syscall(SYS_getrandom, buf, len, 0) < 0;
|
|
#endif
|
|
}
|
|
|
|
dword_t sys_getrandom(addr_t buf_addr, dword_t len, dword_t UNUSED(flags)) {
|
|
if (len > 256)
|
|
return _EIO;
|
|
char buf[256];
|
|
if (get_random(buf, len) != 0)
|
|
return _EIO;
|
|
if (user_write(buf_addr, buf, len))
|
|
return _EFAULT;
|
|
return len;
|
|
}
|