d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add randomness from /dev/random if it is available.

Browse Source
This commit is contained in:
Mark Murray 1996-05-04 07:25:54 +00:00
parent e07e2de9b7
commit 42f2698195
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=15609
1 changed files with 23 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
secure/lib/libdes/new_rkey.c
View File

@ -77,13 +77,14 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: new_rkey.c,v 1.1.1.1 1996/02/10 15:32:24 markm Exp $
* $Id: new_rkey.c,v 1.2 1996/02/10 15:54:48 markm Exp $
*/
/* 21-Nov-95 - eay - I've finally put this into libdes, I have made a
* few changes since it need to compile on all version of unix and
* there were a few things that would not :-) */
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/time.h>
@ -174,9 +175,11 @@ des_init_random_number_generator(key)
u_int32_t tv_sec;
u_int32_t tv_usec;
} time64bit;
u_int32_t devrandom[2];
des_cblock new_key;
int mib[2];
size_t len;
int dr;
/* Get host ID using official BSD 4.4 method */
mib[0] = CTL_KERN;
@ -197,6 +200,25 @@ des_init_random_number_generator(key)
gettimeofday(&timeblock, NULL);
time64bit.tv_sec = (u_int32_t)timeblock.tv_sec;
time64bit.tv_usec = (u_int32_t)timeblock.tv_usec;
/* If /dev/random is available, read some muck */
dr = open("/dev/random", O_RDONLY);
if (dr >= 0) {
/* Set the descriptor into non-blocking mode. */
fcntl(dr, F_SETFL, O_NONBLOCK);
len = read(dr, devrandom, sizeof(devrandom));
close(dr);
if (len > 0) {
time64bit.tv_sec ^= devrandom[0];
time64bit.tv_usec ^= devrandom[1];
}
#ifdef DEBUG
printf("DEBUG: read from /dev/random %d %x %x\n",
len, devrandom[0], devrandom[1]);
#endif
}
#ifdef DEBUG
else printf("Cannot open /dev/random\n");
#endif
des_set_sequence_number((unsigned char *)&time64bit);
/* Do the work */