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#include <limits.h>
#include <tcl.h>
#include "randombytes.h"
long getrandom_impl(void *buf, unsigned int buflen);
static long getrandom_impl(void *buf, unsigned int buflen);
void randombytes(unsigned char *buffer, unsigned long long length) {
long gr_ret;
int errorCount = 0;
/*
* Ensure that the number of bytes requested can fit within
* the types we pass to other calls.
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}
#if defined(HAVE_GETRANDOM)
# ifdef HAVE_SYS_RANDOM_H
# include <sys/random.h>
# endif
long getrandom_impl(void *buf, unsigned int buflen) {
static long getrandom_impl(void *buf, unsigned int buflen) {
ssize_t gr_ret;
gr_ret = getrandom(buf, buflen, 0);
return(gr_ret);
}
#elif defined(HAVE_GETENTROPY)
#include <unistd.h>
long getrandom_impl(void *buf, unsigned int buflen) {
static long getrandom_impl(void *buf, unsigned int buflen) {
int ge_ret;
if (buflen > 255) {
buflen = 255;
}
ge_ret = getentropy(buf, buflen);
if (ge_ret != 0) {
return(-1);
}
return(buflen);
}
#elif defined(HAVE_CRYPTGENRANDOM) && 0
#include <tcl.h>
long getrandom_impl(void *buf, unsigned int buflen) {
static long getrandom_impl(void *buf, unsigned int buflen) {
Tcl_Panic("Incomplete CryptGenRandom");
}
#else
# ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
# endif
# ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
# endif
# ifdef HAVE_FCNTL_H
# include <fcntl.h>
# endif
# ifdef HAVE_UNISTD_H
# include <unistd.h>
# endif
long getrandom_impl(void *buf, unsigned int buflen) {
static long getrandom_impl(void *buf, unsigned int buflen) {
ssize_t read_ret;
long retval;
int fd = -1;
fd = open("/dev/urandom", O_RDONLY);
if (fd < 0) {
return(-1);
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