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libs/bsd: update arc4random with OpenBSD sources.

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Change-Id: I68970d44677a0628681b033f1832fa7afc37d031
Reviewed-on: https://review.haiku-os.org/c/haiku/+/9856
Reviewed-by: waddlesplash <[email protected]>
This commit is contained in:
Jérôme Duval
2025-11-12 07:12:54 +00:00
parent 0ae42c46b1
commit 45ec6479d2
3 changed files with 13 additions and 7 deletions
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src/libs/bsd/arc4random.c
+9 -3
View File
@@ -1,4 +1,4 @@
/* $OpenBSD: arc4random.c,v 1.54 2015/09/13 08:31:47 guenther Exp $ */
/* $OpenBSD: arc4random.c,v 1.58 2022/07/31 13:41:45 tb Exp $ */
/*
* Copyright (c) 1996, David Mazieres <[email protected]>
@@ -49,6 +49,8 @@
#define BLOCKSZ 64
#define RSBUFSZ (16*BLOCKSZ)
#define REKEY_BASE (1024*1024) /* NB. should be a power of 2 */
/* Marked MAP_INHERIT_ZERO, so zero'd out in fork children. */
static struct _rs {
size_t rs_have; /* valid bytes at end of rs_buf */
@@ -147,7 +149,7 @@ _rs_init(u_char *buf, size_t n)
abort();
}
chacha_keysetup(&rsx->rs_chacha, buf, KEYSZ * 8, 0);
chacha_keysetup(&rsx->rs_chacha, buf, KEYSZ * 8);
chacha_ivsetup(&rsx->rs_chacha, buf + KEYSZ);
}
@@ -155,6 +157,7 @@ static void
_rs_stir(void)
{
u_char rnd[KEYSZ + IVSZ];
uint32_t rekey_fuzz = 0;
if (getentropy(rnd, sizeof rnd) == -1)
_getentropy_fail();
@@ -169,7 +172,10 @@ _rs_stir(void)
rs->rs_have = 0;
memset(rsx->rs_buf, 0, sizeof(rsx->rs_buf));
rs->rs_count = 1600000;
/* rekey interval should not be predictable */
chacha_encrypt_bytes(&rsx->rs_chacha, (uint8_t *)&rekey_fuzz,
(uint8_t *)&rekey_fuzz, sizeof(rekey_fuzz));
rs->rs_count = REKEY_BASE + (rekey_fuzz % REKEY_BASE);
}
static inline void
src/libs/bsd/arc4random_uniform.c
+1 -1
View File
@@ -16,7 +16,7 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <stdint.h>
#include <stdlib.h>
/*
src/libs/bsd/chacha_private.h
+3 -3
View File
@@ -4,7 +4,7 @@ D. J. Bernstein
Public domain.
*/
/* $OpenBSD$ */
/* $OpenBSD: chacha_private.h,v 1.3 2022/02/28 21:56:29 dtucker Exp $ */
typedef unsigned char u8;
typedef unsigned int u32;
@@ -52,7 +52,7 @@ static const char sigma[16] = "expand 32-byte k";
static const char tau[16] = "expand 16-byte k";
static void
chacha_keysetup(chacha_ctx *x,const u8 *k,u32 kbits,u32 ivbits)
chacha_keysetup(chacha_ctx *x,const u8 *k,u32 kbits)
{
const char *constants;
@@ -92,7 +92,7 @@ chacha_encrypt_bytes(chacha_ctx *x,const u8 *m,u8 *c,u32 bytes)
u32 j0, j1, j2, j3, j4, j5, j6, j7, j8, j9, j10, j11, j12, j13, j14, j15;
u8 *ctarget = NULL;
u8 tmp[64];
unsigned int i;
u_int i;
if (!bytes) return;