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Add arc4random_stir and arc4random_addrandom functions

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This commit is contained in:
Guillem Jover
2008-06-18 08:44:18 +03:00
parent 26ab4750ee
commit bf4eeb29f0
4 changed files with 33 additions and 1 deletions
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28
src/arc4random.c
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@@ -31,6 +31,7 @@ __FBSDID("$FreeBSD: src/lib/libc/gen/arc4random.c,v 1.10 2004/03/24 14:44:57 gre
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <pthread.h>
struct arc4_stream {
u_int8_t i;
@@ -39,8 +40,14 @@ struct arc4_stream {
};
#define RANDOMDEV "/dev/urandom"
#ifdef __REENTRANT
static pthread_mutex_t arc4random_mtx = PTHREAD_MUTEX_INITIALIZER;
#define THREAD_LOCK() pthread_mutex_lock(&arc4random_mtx)
#define THREAD_UNLOCK() pthread_mutex_unlock(&arc4random_mtx)
#else
#define THREAD_LOCK()
#define THREAD_UNLOCK()
#endif
static struct arc4_stream rs;
static int rs_initialized;
@@ -155,6 +162,27 @@ arc4_check_stir(void)
}
}
void
arc4random_stir()
{
THREAD_LOCK();
arc4_check_init();
arc4_stir(&rs);
THREAD_UNLOCK();
}
void
arc4random_addrandom(dat, datlen)
u_char *dat;
int datlen;
{
THREAD_LOCK();
arc4_check_init();
arc4_check_stir();
arc4_addrandom(&rs, dat, datlen);
THREAD_UNLOCK();
}
u_int32_t
arc4random()
{