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Automatically re-stir every 400000 calls

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Obtained from:  OpenBSD
This commit is contained in:
Andrey A. Chernov 2006-10-04 01:17:23 +00:00
parent aed19ad525
commit f68412f927
1 changed files with 4 additions and 2 deletions
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6
lib/libc/gen/arc4random.c
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@ -61,6 +61,7 @@ static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
static struct arc4_stream rs;
static int rs_initialized;
static int rs_stired;
static int arc4_count;
static inline u_int8_t arc4_getbyte(struct arc4_stream *);
static void arc4_stir(struct arc4_stream *);
@ -127,7 +128,8 @@ arc4_stir(as)
* by Ilya Mironov.
*/
for (n = 0; n < 1024; n++)
arc4_getbyte(as);
(void) arc4_getbyte(as);
arc4_count = 400000;
}
static inline u_int8_t
@ -172,7 +174,7 @@ arc4_check_init(void)
static void
arc4_check_stir(void)
{
if (!rs_stired) {
if (!rs_stired || --arc4_count == 0) {
arc4_stir(&rs);
rs_stired = 1;
}