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doc/website/static/security/patches/SA-00:52/tcp-iss-3.x.patch
Sergio Carlavilla Delgado 989d921f5d Migrate doc to Hugo/AsciiDoctor 
I'm very pleased to announce the release of
our new website and documentation using
the new toolchain with Hugo and AsciiDoctor.

To get more information about the new toolchain
please read the FreeBSD Documentation Project Primer[1],
Hugo docs[2] and AsciiDoctor docs[3].

Acknowledgment:
Benedict Reuschling <bcr@>
Glen Barber <gjb@>
Hiroki Sato <hrs@>
Li-Wen Hsu <lwhsu@>
Sean Chittenden <seanc@>
The FreeBSD Foundation

[1] https://docs.FreeBSD.org/en/books/fdp-primer/
[2] https://gohugo.io/documentation/
[3] https://docs.asciidoctor.org/home/

Approved by:    doceng, core
2021-01-26 00:31:29 +01:00

196 lines
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Index: tcp_seq.h
===================================================================
RCS file: /usr2/ncvs/src/sys/netinet/tcp_seq.h,v
retrieving revision 1.11
retrieving revision 1.12
diff -u -r1.11 -r1.12
--- netinet/tcp_seq.h 1999/12/29 04:41:02 1.11
+++ netinet/tcp_seq.h 2000/09/29 01:37:19 1.12
@@ -91,7 +91,7 @@
* number in the range [0-0x3ffff] that is hard to predict.
*/
#ifndef tcp_random18
-#define tcp_random18() ((random() >> 14) & 0x3ffff)
+#define tcp_random18() (arc4random() & 0x3ffff)
#endif
#define TCP_ISSINCR (122*1024 + tcp_random18())
Index: tcp_subr.c
===================================================================
RCS file: /usr2/ncvs/src/sys/netinet/tcp_subr.c,v
retrieving revision 1.80
retrieving revision 1.81
diff -u -r1.80 -r1.81
--- netinet/tcp_subr.c 2000/09/25 23:40:22 1.80
+++ netinet/tcp_subr.c 2000/09/29 01:37:19 1.81
@@ -178,7 +178,7 @@
{
int hashsize;
- tcp_iss = random(); /* wrong, but better than a constant */
+ tcp_iss = arc4random(); /* wrong, but better than a constant */
tcp_ccgen = 1;
tcp_cleartaocache();
Index: sys/alpha/conf/files.alpha
===================================================================
RCS file: /usr2/ncvs/src/sys/alpha/conf/Attic/files.alpha,v
retrieving revision 1.15.2.3
retrieving revision 1.15.2.4
diff -u -u -r1.15.2.3 -r1.15.2.4
--- alpha/conf/files.alpha 1999/12/06 21:03:17 1.15.2.3
+++ alpha/conf/files.alpha 2000/09/29 22:07:27 1.15.2.4
@@ -120,6 +120,7 @@
alpha/isa/isa.c optional isa
alpha/isa/mcclock_isa.c optional isa
alpha/alpha/elf_machdep.c standard
+libkern/arc4random.c standard
libkern/bcd.c standard
libkern/bcmp.c standard
libkern/ffs.c standard
Index: sys/i386/conf/files.i386
===================================================================
RCS file: /usr2/ncvs/src/sys/i386/conf/Attic/files.i386,v
retrieving revision 1.220.2.17
retrieving revision 1.220.2.18
diff -u -u -r1.220.2.17 -r1.220.2.18
--- i386/conf/files.i386 1999/12/06 21:03:19 1.220.2.17
+++ i386/conf/files.i386 2000/09/29 22:07:28 1.220.2.18
@@ -330,6 +330,7 @@
i4b/layer1/i4b_elsa_qs1i.c optional isic device-driver
i4b/layer1/i4b_elsa_qs1p.c optional isic device-driver
i4b/layer1/i4b_siemens_isurf.c optional isic device-driver
+libkern/arc4random.c standard
libkern/bcd.c standard
libkern/divdi3.c standard
libkern/inet_ntoa.c standard
Index: sys/sys/libkern.h
===================================================================
RCS file: /usr2/ncvs/src/sys/sys/libkern.h,v
retrieving revision 1.16.4.1
retrieving revision 1.16.4.2
diff -u -u -r1.16.4.1 -r1.16.4.2
--- sys/libkern.h 1999/08/29 16:32:28 1.16.4.1
+++ sys/libkern.h 2000/09/29 22:07:29 1.16.4.2
@@ -61,6 +61,7 @@
static __inline u_long ulmin(u_long a, u_long b) { return (a < b ? a : b); }
/* Prototypes for non-quad routines. */
+u_int32_t arc4random __P((void));
int bcmp __P((const void *, const void *, size_t));
#ifndef HAVE_INLINE_FFS
int ffs __P((int));
--- /dev/null Thu Oct 5 03:00:27 2000
+++ libkern/arc4random.c Fri Sep 29 15:07:29 2000
@@ -0,0 +1,111 @@
+/*-
+ * THE BEER-WARE LICENSE
+ *
+ * <dan@FreeBSD.ORG> wrote this file. As long as you retain this notice you
+ * can do whatever you want with this stuff. If we meet some day, and you
+ * think this stuff is worth it, you can buy me a beer in return.
+ *
+ * Dan Moschuk
+ *
+ * $FreeBSD: src/sys/libkern/arc4random.c,v 1.6.2.1 2000/09/29 22:07:29 kris Exp $
+ */
+
+#include <sys/libkern.h>
+
+#define ARC4_MAXRUNS 64
+
+static u_int8_t arc4_i, arc4_j;
+static int arc4_initialized = 0;
+static int arc4_numruns = 0;
+static u_int8_t arc4_sbox[256];
+
+extern u_int read_random (void *, u_int);
+
+static __inline void
+arc4_swap(u_int8_t *a, u_int8_t *b)
+{
+ u_int8_t c;
+
+ c = *a;
+ *a = *b;
+ *b = c;
+}
+
+/*
+ * Stir our S-box.
+ */
+static void
+arc4_randomstir (void)
+{
+ u_int8_t key[256];
+ int r, n;
+
+ r = read_random(key, sizeof(key));
+ /* if r == 0 || -1, just use what was on the stack */
+ if (r > 0)
+ {
+ for (n = r; n < sizeof(key); n++)
+ key[n] = key[n % r];
+ }
+
+ for (n = 0; n < 256; n++)
+ {
+ arc4_j = (arc4_j + arc4_sbox[n] + key[n]) % 256;
+ arc4_swap(&arc4_sbox[n], &arc4_sbox[arc4_j]);
+ }
+}
+
+/*
+ * Initialize our S-box to its beginning defaults.
+ */
+static void
+arc4_init(void)
+{
+ int n;
+
+ arc4_i = arc4_j = 0;
+ for (n = 0; n < 256; n++)
+ arc4_sbox[n] = (u_int8_t) n;
+
+ arc4_randomstir();
+ arc4_initialized = 1;
+}
+
+/*
+ * Generate a random byte.
+ */
+static u_int8_t
+arc4_randbyte(void)
+{
+ u_int8_t arc4_t;
+
+ arc4_i = (arc4_i + 1) % 256;
+ arc4_j = (arc4_j + arc4_sbox[arc4_i]) % 256;
+
+ arc4_swap(&arc4_sbox[arc4_i], &arc4_sbox[arc4_j]);
+
+ arc4_t = (arc4_sbox[arc4_i] + arc4_sbox[arc4_j]) % 256;
+ return arc4_sbox[arc4_t];
+}
+
+u_int32_t
+arc4random(void)
+{
+ u_int32_t ret;
+
+ /* Initialize array if needed. */
+ if (!arc4_initialized)
+ arc4_init();
+ if (++arc4_numruns > ARC4_MAXRUNS)
+ {
+ arc4_randomstir();
+ arc4_numruns = 0;
+ }
+
+ ret = arc4_randbyte();
+ ret |= arc4_randbyte() << 8;
+ ret |= arc4_randbyte() << 16;
+ ret |= arc4_randbyte() << 24;
+
+ return ret;
+}
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