Author: cieciwa Date: Thu Sep 15 08:52:02 2005 GMT
Module: SOURCES Tag: LINUX_2_6
---- Log message:
- [extra] XOR - kernel patch.
---- Files affected:
SOURCES:
linux-2.6-nf-XOR.patch (NONE -> 1.1.2.1) (NEW)
---- Diffs:
================================================================
Index: SOURCES/linux-2.6-nf-XOR.patch
diff -u /dev/null SOURCES/linux-2.6-nf-XOR.patch:1.1.2.1
--- /dev/null Thu Sep 15 10:52:02 2005
+++ SOURCES/linux-2.6-nf-XOR.patch Thu Sep 15 10:51:57 2005
@@ -0,0 +1,164 @@
+ include/linux/netfilter_ipv4/ipt_XOR.h | 9 ++
+ net/ipv4/netfilter/Kconfig | 10 ++
+ net/ipv4/netfilter/Makefile | 1
+ net/ipv4/netfilter/ipt_XOR.c | 117
+++++++++++++++++++++++++++++++++
+ 4 files changed, 137 insertions(+)
+
+diff -Nur --exclude '*.orig'
linux-2.6.13.1.org/include/linux/netfilter_ipv4/ipt_XOR.h
linux-2.6.13.1/include/linux/netfilter_ipv4/ipt_XOR.h
+--- linux-2.6.13.1.org/include/linux/netfilter_ipv4/ipt_XOR.h 1970-01-01
01:00:00.000000000 +0100
++++ linux-2.6.13.1/include/linux/netfilter_ipv4/ipt_XOR.h 2005-09-15
10:42:55.000000000 +0200
+@@ -0,0 +1,9 @@
++#ifndef _IPT_XOR_H
++#define _IPT_XOR_H
++
++struct ipt_XOR_info {
++ char key[30];
++ u_int8_t block_size;
++};
++
++#endif /* _IPT_XOR_H */
+diff -Nur --exclude '*.orig' linux-2.6.13.1.org/net/ipv4/netfilter/Kconfig
linux-2.6.13.1/net/ipv4/netfilter/Kconfig
+--- linux-2.6.13.1.org/net/ipv4/netfilter/Kconfig 2005-09-10
04:42:58.000000000 +0200
++++ linux-2.6.13.1/net/ipv4/netfilter/Kconfig 2005-09-15 10:42:55.000000000
+0200
+@@ -692,5 +692,15 @@
+ Allows altering the ARP packet payload: source and destination
+ hardware and network addresses.
+
++config IP_NF_TARGET_XOR
++ tristate 'XOR target support'
++ depends on IP_NF_MANGLE
++ help
++ This option adds a `XOR' target, which can encrypt TCP and
++ UDP traffic using a simple XOR encryption.
++
++ If you want to compile it as a module, say M here and read
++ Documentation/modules.txt. If unsure, say `N'.
++
+ endmenu
+
+diff -Nur --exclude '*.orig' linux-2.6.13.1.org/net/ipv4/netfilter/Makefile
linux-2.6.13.1/net/ipv4/netfilter/Makefile
+--- linux-2.6.13.1.org/net/ipv4/netfilter/Makefile 2005-09-10
04:42:58.000000000 +0200
++++ linux-2.6.13.1/net/ipv4/netfilter/Makefile 2005-09-15 10:42:55.000000000
+0200
+@@ -0,0 +0,1 @@
++obj-$(CONFIG_IP_NF_TARGET_XOR) += ipt_XOR.o
+diff -Nur --exclude '*.orig' linux-2.6.13.1.org/net/ipv4/netfilter/ipt_XOR.c
linux-2.6.13.1/net/ipv4/netfilter/ipt_XOR.c
+--- linux-2.6.13.1.org/net/ipv4/netfilter/ipt_XOR.c 1970-01-01
01:00:00.000000000 +0100
++++ linux-2.6.13.1/net/ipv4/netfilter/ipt_XOR.c 2005-09-15
10:42:55.000000000 +0200
+@@ -0,0 +1,117 @@
++/* XOR target for IP tables
++ * (C) 2000 by Tim Vandermeersch <[EMAIL PROTECTED]>
++ * Based on ipt_TTL.c
++ *
++ * Version 1.0
++ *
++ * This software is distributed under the terms of GNU GPL
++ */
++
++#include <linux/module.h>
++#include <linux/skbuff.h>
++#include <linux/ip.h>
++#include <linux/tcp.h>
++#include <linux/udp.h>
++
++#include <linux/netfilter_ipv4/ip_tables.h>
++#include <linux/netfilter_ipv4/ipt_XOR.h>
++
++MODULE_AUTHOR("Tim Vandermeersch <[EMAIL PROTECTED]>");
++MODULE_DESCRIPTION("IP tables XOR module");
++MODULE_LICENSE("GPL");
++
++static unsigned int
++ipt_xor_target(struct sk_buff **pskb,
++ const struct net_device *in, const struct net_device *out,
++ unsigned int hooknum, const void *targinfo, void *userinfo)
++{
++ struct ipt_XOR_info *info = (void *) targinfo;
++ struct iphdr *iph;
++ struct tcphdr *tcph;
++ struct udphdr *udph;
++ int i, j, k;
++
++ if (!skb_ip_make_writable(pskb, (*pskb)->len))
++ return NF_DROP;
++
++ iph = (*pskb)->nh.iph;
++
++ if (iph->protocol == IPPROTO_TCP) {
++ tcph = (struct tcphdr *) ((*pskb)->data + iph->ihl*4);
++ for (i=0, j=0; i<(ntohs(iph->tot_len) - iph->ihl*4 -
tcph->doff*4); ) {
++ for (k=0; k<=info->block_size; k++) {
++ (*pskb)->data[ iph->ihl*4 + tcph->doff*4 + i ]
^=
++ info->key[j];
++ i++;
++ }
++ j++;
++ if (info->key[j] == 0x00)
++ j = 0;
++ }
++ } else if (iph->protocol == IPPROTO_UDP) {
++ udph = (struct udphdr *) ((*pskb)->data + iph->ihl*4);
++ for (i=0, j=0; i<(ntohs(udph->len)-8); ) {
++ for (k=0; k<=info->block_size; k++) {
++ (*pskb)->data[ iph->ihl*4 + sizeof(struct
udphdr) + i ] ^=
++ info->key[j];
++ i++;
++ }
++ j++;
++ if (info->key[j] == 0x00)
++ j = 0;
++ }
++ }
++
++ return IPT_CONTINUE;
++}
++
++static int ipt_xor_checkentry(const char *tablename, const struct ipt_entry
*e,
++ void *targinfo, unsigned int targinfosize,
++ unsigned int hook_mask)
++{
++ struct ipt_XOR_info *info = targinfo;
++
++ if (targinfosize != IPT_ALIGN(sizeof(struct ipt_XOR_info))) {
++ printk(KERN_WARNING "XOR: targinfosize %u != %Zu\n",
++ targinfosize, IPT_ALIGN(sizeof(struct
ipt_XOR_info)));
++ return 0;
++ }
++
++ if (strcmp(tablename, "mangle")) {
++ printk(KERN_WARNING "XOR: can only be called from"
++ "\"mangle\" table, not \"%s\"\n", tablename);
++ return 0;
++ }
++
++ if (!strcmp(info->key, "")) {
++ printk(KERN_WARNING "XOR: You must specify a key");
++ return 0;
++ }
++
++ if (info->block_size == 0) {
++ printk(KERN_WARNING "XOR: You must specify a block-size");
++ return 0;
++ }
++
++ return 1;
++}
++
++static struct ipt_target ipt_XOR = {
++ .name = "XOR",
++ .target = ipt_xor_target,
++ .checkentry = ipt_xor_checkentry,
++ .me = THIS_MODULE,
++};
++
++static int __init init(void)
++{
++ return ipt_register_target(&ipt_XOR);
++}
++
++static void __exit fini(void)
++{
++ ipt_unregister_target(&ipt_XOR);
++}
++
++module_init(init);
++module_exit(fini);
================================================================
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