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random: cleanup, assume getrandom libc wrapper exists

This commit is contained in:
Albert S. 2020-04-19 16:55:25 +02:00
parent f73dd3b295
commit e435e84bfa
1 changed files with 1 additions and 26 deletions
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27
random.h
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@ -3,37 +3,13 @@
#include <unistd.h> #include <unistd.h>
#include <sys/syscall.h> #include <sys/syscall.h>
#ifdef __linux__ #ifdef __linux__
#include <linux/random.h> #include <sys/random.h>
#endif
#ifndef SYS_getrandom
#include <openssl/rand.h>
#endif #endif
#include <stdlib.h> #include <stdlib.h>
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
#include <string> #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__ #if __OpenBSD__
inline int getrandom(void *buf, size_t buflen, unsigned int flags) inline int getrandom(void *buf, size_t buflen, unsigned int flags)
{ {
@ -41,7 +17,6 @@ inline int getrandom(void *buf, size_t buflen, unsigned int flags)
return 0; return 0;
} }
#endif #endif
#endif
/* TODO: if the >=C++11 prngr are good enough, use them */ /* TODO: if the >=C++11 prngr are good enough, use them */
class Random class Random
{ {