cuberite/libevent
1
0
Fork 0
mirror of https://github.com/cuberite/libevent.git synced 2025-09-15 07:15:03 -04:00
Code Issues Packages Projects Releases Wiki Activity

Fix a couple of bugs in the BSD sysctl arc4seed logic

Browse Source 
Of course, FreeBSD has its own arc4random() implementation, so this should
never actually be needed.  Still, it's good to paint the underside of the
wagon.
This commit is contained in:
Nick Mathewson 2010-04-23 16:08:09 -04:00
parent a5bf43abb0
commit a47a4b7e7e
2 changed files with 8 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arc4random.c
View File

@ -201,16 +201,16 @@ arc4_seed_sysctl_linux(void)
}
#endif
#if _EVENT_HAVE_DECL_CTL_KERN && _EVENT_HAVE_DECL_KERN_ARAND
#if _EVENT_HAVE_DECL_CTL_KERN && _EVENT_HAVE_DECL_KERN_ARND
#define TRY_SEED_SYSCTL_BSD
static int
arc4_seed_sysctl_bsd(void)
{
/* Based on code from William Ahern and from OpenBSD, this function
* tries to use the KERN_ARAND syscall to get entropy from the kernel.
* tries to use the KERN_ARND syscall to get entropy from the kernel.
* This can work even if /dev/urandom is inaccessible for some reason
* (e.g., we're running in a chroot). */
int mib[] = { CTL_KERN, KERN_ARAND };
int mib[] = { CTL_KERN, KERN_ARND };
unsigned char buf[ADD_ENTROPY];
size_t len, n;
int i, any_set;
@ -218,7 +218,7 @@ arc4_seed_sysctl_bsd(void)
memset(buf, 0, sizeof(buf));
len = sizeof(buf);
if (sysctl(mib, 2, rnd, &len, NULL, 0) == -1) {
if (sysctl(mib, 2, buf, &len, NULL, 0) == -1) {
for (len = 0; len < sizeof(buf); len += sizeof(unsigned)) {
n = sizeof(unsigned);
if (n + len > sizeof(buf))

5
configure.in
View File

@ -159,8 +159,9 @@ if test "x$ac_cv_header_sys_time_h" = "xyes"; then
fi
if test "x$ac_cv_header_sys_sysctl_h" = "xyes"; then
AC_CHECK_DECLS([CTL_KERN, KERN_RANDOM, RANDOM_UUID, KERN_ARAND], [], [],
[[#include <sys/sysctl.h>]]
AC_CHECK_DECLS([CTL_KERN, KERN_RANDOM, RANDOM_UUID, KERN_ARND], [], [],
[[#include <sys/types.h>
#include <sys/sysctl.h>]]
)
fi