The Linux Intrusion Detection System (LIDS) is a patch which enhances the kernel's security by implementing a reference monitor and Mandatory Access Control (MAC). When it is in effect, chosen file access, all system/network administration operations, any capability use, raw device, memory, and I/O access can be made impossible even for root. You can define which programs may access specific files. It uses and extends the system capabilities bounding set to control the whole system and adds some network and filesystem security features to the kernel to enhance the security. You can finely tune the security protections online, hide sensitive processes, receive security alerts through the network, and more.
93b7374c32ad1d4530b04a2aee544e95c23d97e7b0f9febb5481915180233655diff -Nru linux-2.6.21.1.org/security/Kconfig linux-2.6.21.1/security/Kconfig
--- linux-2.6.21.1.org/security/Kconfig 2007-04-28 06:49:26.000000000 +0900
+++ linux-2.6.21.1/security/Kconfig 2007-05-22 11:36:54.000000000 +0900
@@ -75,14 +75,16 @@
config SECURITY_CAPABILITIES
tristate "Default Linux Capabilities"
- depends on SECURITY
+ depends on SECURITY!=n
help
This enables the "default" Linux capabilities functionality.
If you are unsure how to answer this question, answer Y.
+source security/lids/Kconfig
+
config SECURITY_ROOTPLUG
tristate "Root Plug Support"
- depends on USB && SECURITY
+ depends on USB && SECURITY!=n
help
This is a sample LSM module that should only be used as such.
It prevents any programs running with egid == 0 if a specific
diff -Nru linux-2.6.21.1.org/security/Makefile linux-2.6.21.1/security/Makefile
--- linux-2.6.21.1.org/security/Makefile 2007-04-28 06:49:26.000000000 +0900
+++ linux-2.6.21.1/security/Makefile 2007-05-22 11:36:54.000000000 +0900
@@ -4,6 +4,7 @@
obj-$(CONFIG_KEYS) += keys/
subdir-$(CONFIG_SECURITY_SELINUX) += selinux
+subdir-$(CONFIG_LIDS) += lids
# if we don't select a security model, use the default capabilities
ifneq ($(CONFIG_SECURITY),y)
@@ -16,3 +17,8 @@
obj-$(CONFIG_SECURITY_SELINUX) += selinux/built-in.o
obj-$(CONFIG_SECURITY_CAPABILITIES) += commoncap.o capability.o
obj-$(CONFIG_SECURITY_ROOTPLUG) += commoncap.o root_plug.o
+
+
+ifeq ($(CONFIG_LIDS),y)
+ obj-$(CONFIG_LIDS) += lids/built-in.o
+endif
diff -Nru linux-2.6.21.1.org/security/lids/Kconfig linux-2.6.21.1/security/lids/Kconfig
--- linux-2.6.21.1.org/security/lids/Kconfig 1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.21.1/security/lids/Kconfig 2007-05-22 11:36:54.000000000 +0900
@@ -0,0 +1,104 @@
+#
+# Kconfig for LIDS
+#
+
+menu "LIDS support"
+ depends on EXPERIMENTAL && SYSCTL && SECURITY && SECURITY_SECLVL!=y && SECURITY_ROOTPLUG!=y && SECURITY_SELINUX!=y && SECURITY_CAPABILITIES!=y
+
+config LIDS
+ tristate "Linux Intrusion Detection System support (EXPERIMENTAL)"
+ help
+ LIDS - Linux Intrusion Detection System can let you protect
+ your linux kernel.
+
+ In order to use LIDS, you need to download the lidstools first
+ from http://www.lids.org/
+
+ Please read help provided with each option carefully. At the end
+ of each option we indicate what answer will increase security.
+ Be aware that security always has side effects, and some
+ programs could break.
+
+ If you have any questions about LIDS, mail to the authors :
+ Huagang Xie ( xie@www.lids.org)
+ Philippe.biondi (philippe.biondi@webmotion.net)
+
+ or visit lids home ,
+ http://www.lids.org/
+
+ And you can get help from the LIDS Mailing list at
+ http://www.lids.org/maillist.html
+
+ If your want to make LIDS as module, say "M" here , or if you
+ want to build it into the kernel, say "Y" here. otherwise,
+ say "N".
+
+comment "LIDS Options"
+ depends on LIDS
+
+config LIDS_NO_FLOOD_LOG
+ bool "Attempt not to flood logs"
+ depends on LIDS
+ default y
+ help
+ If you say Yes here, LIDS will try not to flood logs with the
+ same message repeated a lot of times.
+
+ Saying yes will increase security.
+
+config LIDS_ALLOW_SWITCH
+ bool "Allow switching the LFS and States"
+ depends on LIDS && PROC_FS && CRYPTO_SHA256
+ default y
+ help
+ If you say Yes here, you will enable the switch the LIDS between states
+ Note: You must set a password with 'lidsadm -P'
+
+config LIDS_ALLOW_LFS
+ bool "Allow switch the Linux Free Session"
+ depends on LIDS_ALLOW_SWITCH
+ default y
+ help
+ If you say Yes here, you will enable the possibility to switch LIDS on and off.
+
+ You can turn LIDS off only on current console by
+ lidsadm -S -- -LIDS
+ or globally off by
+ lidsadm -S -- -LIDS_GLOBAL
+ by enable this option.
+
+ Saying no increases security.
+
+config LIDS_RESTRICT_MODE_SWITCH
+ bool "Restrict mode switching to specified terminals"
+ depends on LIDS && LIDS_ALLOW_SWITCH
+ default n
+ help
+ If you enable this option, mode switching will be only allowed
+ from specified terminal types.
+
+config LIDS_MODE_SWITCH_CONSOLE
+ bool "Allow mode switching from a Linux Console"
+ depends on LIDS && LIDS_RESTRICT_MODE_SWITCH
+ default y
+ help
+ Allow mode switching from a Linux Console.
+
+config LIDS_MODE_SWITCH_SERIAL
+ bool "Allow mode switching from a serial Console"
+ depends on LIDS && LIDS_RESTRICT_MODE_SWITCH
+ help
+ Allow mode switching from a serial Console.
+
+config LIDS_MODE_SWITCH_PTY
+ bool "Allow mode switching from a PTY"
+ depends on LIDS && LIDS_RESTRICT_MODE_SWITCH
+ help
+ Allow mode switching from a PTY.
+
+config LIDS_SHRINK_SIZE
+ bool "Shrink the size of ACLs"
+ depends on LIDS && 4KSTACKS!=y
+ help
+ Shrink the size of ACLs information. Disable 4K Stacks under "Kernel Hacking" when you wish to use this option.
+endmenu
diff -Nru linux-2.6.21.1.org/security/lids/Makefile linux-2.6.21.1/security/lids/Makefile
--- linux-2.6.21.1.org/security/lids/Makefile 1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.21.1/security/lids/Makefile 2007-05-22 11:36:54.000000000 +0900
@@ -0,0 +1,11 @@
+#
+# Makefile for the LIDS code
+#
+
+EXTRA_CFLAGS += -Isecurity/lids/include
+
+obj-$(CONFIG_LIDS) := lids.o
+
+lids-objs := lids_lsm.o lids_acl.o lids_cap.o\
+ lids_sysctl.o lids_init.o \
+ lids_logs.o
diff -Nru linux-2.6.21.1.org/security/lids/Makefile.in linux-2.6.21.1/security/lids/Makefile.in
--- linux-2.6.21.1.org/security/lids/Makefile.in 1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.21.1/security/lids/Makefile.in 2007-05-22 11:36:54.000000000 +0900
@@ -0,0 +1,6 @@
+# for LIDS project
+KBUILD_INCLUDE_PATHS=security/lids/include
+
+objlink(CONFIG_LIDS lids_lsm.o lids_acl.o lids_init.o lids_cap.o lids_sysctl.o lids_logs.o lids_lsm.o )
+
+select(CONFIG_LIDS lids.o)
diff -Nru linux-2.6.21.1.org/security/lids/include/linux/lids.h linux-2.6.21.1/security/lids/include/linux/lids.h
--- linux-2.6.21.1.org/security/lids/include/linux/lids.h 1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.21.1/security/lids/include/linux/lids.h 2007-05-22 11:36:54.000000000 +0900
@@ -0,0 +1,100 @@
+#ifndef LIDS_H
+#define LIDS_H
+
+/*
+ * This file include everything needed for LIDS internals.
+ * The biggest part is included from in lidsif.h
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/sysctl.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/binfmts.h>
+
+#include "lidsext.h"
+#include "lidsif.h"
+
+#ifndef KERNEL_VERSION
+#define KERNEL_VERSION(x,y,z) (((x)<<16)+((y)<<8)+(z))
+#endif
+
+#define LIDS_VERSION "2.2.3rc1"
+
+#define LIDS_ERROR(value) lids_acl_discovery?0:value
+
+#define LIDS_SHELLCODE_LENGTH 512
+#ifdef CONFIG_X86
+#define LIDS_SHELLCODE_STRING "\xcd\x80" /* X86 int 80 */
+#endif
+#ifdef CONFIG_SPARC32
+#define LIDS_SHELLCODE_STRING "\x91\xd0\x20" /* SPARC, ta */
+#endif
+#ifdef CONFIG_PPC
+#define LIDS_SHELLCODE_STRING " \x44\xFF\xFF\x02\x7C\xE0\x3B\x78" /* system call, PPC */
+#endif
+#ifdef CONFIG_MIPS
+#define LIDS_SHELLCODE_STRING "\x02\x04\x8d\x0c" /* system call, MIPS from irix */
+#endif
+
+extern kernel_cap_t lids_cap_val;
+extern struct lids_s_inode lidsadm;
+extern char lids_state_name[3][9];
+extern int lids_load; /* 1 = load ids protection , 0 = don't load */
+extern int lids_init_setup; /* 1 = init the seutp, 0 = do not */
+extern lids_flags_t lids_flags; /* 1 = load ids protection , 0 = don't load */
+extern int lids_local_on;
+extern lids_flags_t lids_flags;
+extern int lids_acl_discovery; /* 1 = in ACL DISCOVERY MODE, 0 = in normal mode */
+extern int lids_update_version;
+
+int _open_namei(const char *pathname, int flag, int mode, struct nameidata *nd);
+struct file *_filp_open(const char *filename, int flags, int mode);
+
+extern void lids_free_task_security(struct task_struct *tsk);
+
+int lids_init_task_acl(struct lids_task_acl *acl);
+int lids_compute_acls(struct lids_subject_acl *current_s_acl,
+ struct lids_subject_acl *new_s_acl,
+ struct lids_subject_acl *computed_s_acl, int protect);
+void lids_set_task_acl(struct lids_subject_acl *acl, struct task_struct *task);
+void lids_free_lids_task_acl(struct lids_task_acl *acl);
+/*
+int lids_get_inode_security(struct dentry *o_dentry,
+ struct inode *inode);
+*/
+extern struct lids_inode_acl * lids_do_get_acl(struct inode *inode);
+
+
+extern struct lids_sys_acl *lids_search_acl(unsigned long int ino, dev_t dev,
+ unsigned long lids_curr);
+extern int lids_check_base(struct dentry *dentry, int flag);
+extern int lids_check_hidden_inode(unsigned long int ino, dev_t dev);
+extern int lids_bind_checker(const int);
+extern int lids_local_off(void);
+extern int lids_execve(struct linux_binprm *);
+extern int lids_execve_check_envp(struct linux_binprm *bprm);
+extern int lids_fork_task(struct task_struct *tsk);
+extern int lids_sysctl_init(void);
+extern void lids_sysctl_reset(void);
+extern int lids_check_task_kill(struct task_struct *p, struct siginfo *info,
+ int sig);
+//extern struct lids_task_acl *lids_alloc_task_acl(struct task_struct *);
+extern void lids_free_task_acl(struct lids_task_acl *);
+extern void lids_free_inode_acl(struct lids_inode_acl *);
+extern void lids_free_subject_acl(struct lids_subject_acl *s_acl);
+
+extern void lids_do_inode_post_create(struct inode *inode,
+ struct dentry *dentry);
+extern int lids_setup_task_acl(int state);
+extern struct dentry *lids_get_task_dentry(struct task_struct *task);
+
+extern int lids_check_capable(struct task_struct *tsk, int cap, int log);
+extern int lids_ext_capable(struct task_struct *tsk, int type);
+extern void lids_free_security(struct task_struct *p);
+
+extern void lids_alert(int type, long dst, long dst2, char *name, char *action);
+extern int lids_read_pw(void);
+extern int do_lids_setup(void);
+extern int lids_check_capset(struct task_struct *tsk, kernel_cap_t a,kernel_cap_t set);
+#endif /* LIDS_H */
diff -Nru linux-2.6.21.1.org/security/lids/include/linux/lids_sysctl.h linux-2.6.21.1/security/lids/include/linux/lids_sysctl.h
--- linux-2.6.21.1.org/security/lids/include/linux/lids_sysctl.h 1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.21.1/security/lids/include/linux/lids_sysctl.h 2007-05-22 11:36:54.000000000 +0900
@@ -0,0 +1,168 @@
+#include <linux/lids.h>
+#include <linux/lidsext.h>
+#include <linux/lidsif.h>
+
+#ifdef CONFIG_LIDS_ALLOW_LFS
+#define lids_process_switch() \
+do { \
+ if (lids_load != (lids_flag_raised(flags, LIDS_FLAGS_LIDS_ON) != 0)) { \
+ lids_load = (lids_flag_raised(flags, LIDS_FLAGS_LIDS_ON) != 0);\
+ lids_security_alert("LIDS switched to %d", lids_load);\
+ if (lids_load) \
+ lids_flag_raise(lids_flags, LIDS_FLAGS_LIDS_ON); \
+ else \
+ lids_flag_lower(lids_flags, LIDS_FLAGS_LIDS_ON); \
+ } \
+ if (lids_local_on != \
+ (lids_flag_raised(flags, LIDS_FLAGS_LIDS_LOCAL_ON) != 0)) { \
+ lids_local_on = (lids_flag_raised(flags, LIDS_FLAGS_LIDS_LOCAL_ON) != 0); \
+ /* XXX: Race condition here. We must first assign the PID */ \
+ lids_security_alert("LIDS locally switched to %i", \
+ lids_local_on); \
+ if (lids_local_on) { \
+ lids_flag_raise(lids_flags, LIDS_FLAGS_LIDS_LOCAL_ON); \
+ } else { \
+ lids_local_pid = current->parent->pid; \
+ \
+ if (lids_local_pid == 1) { /* this doesn't apply to init */\
+ printk \
+ ("Can't give local lids deactivation to init!!\n"); \
+ lids_flag_raise(lids_flags, \
+ LIDS_FLAGS_LIDS_LOCAL_ON); \
+ lids_local_on = 1; \
+ } else \
+ lids_flag_lower(lids_flags, LIDS_FLAGS_LIDS_LOCAL_ON); \
+ } \
+ } \
+}while(0);
+#else
+#define lids_process_switch() \
+do { \
+ if (!lids_flag_raised(flags, LIDS_FLAGS_LIDS_ON)) { \
+ lids_security_alert \
+ ("Attempt to switch LIDS off (feature disabled)"); \
+ return -1; \
+ } \
+}while(0);
+#endif
+
+#ifdef CONFIG_LIDS_ALLOW_SWITCH
+
+#define lids_process_password() \
+do{ \
+ char lids_sig[LIDS_PW_LEN*2]; \
+ if ((!lids_first_time) || (locks.passwd[0])) { \
+ lids_sha256(locks.passwd, LIDS_PW_LEN, lids_sig); \
+ memset((char *)locks.passwd, '\0', sizeof(passwd_t)); \
+ } \
+ if (((lids_first_time) && (!locks.passwd[0])) || \
+ (!memcmp(lids_sig, lids_pw, LIDS_PW_LEN))) { \
+ /* access granted ! */ \
+ number_failed = 0; \
+ if (lids_process_flags(locks.flags) == 0) { \
+ /* Seal the kernel,we can change the cap_set here */\
+ if (lids_first_time || \
+ lids_flag_raised(locks.flags, \
+ LIDS_FLAGS_RELOAD_CONF)\
+ || lids_flag_raised(locks.flags, \
+ LIDS_FLAGS_SHUTDOWN))\
+ cap_bset = lids_cap_val; \
+ else \
+ cap_bset = locks.cap_bset; \
+ lids_security_alert \
+ ("Changed: cap_bset=0x%x lids_flags=0x%x",\
+ cap_t(cap_bset), lids_flags); \
+ } \
+ lids_first_time = 0; \
+ } else { \
+ number_failed++; \
+ lids_security_alert \
+ ("Give incorrect password (try #%d) with caps=0x%x and flags=0x%x",\
+ number_failed, cap_t(locks.cap_bset), locks.flags); \
+ if (number_failed >= LIDS_MAX_TRY) { \
+ wait_after_fail = 1; \
+ init_timer(&fail_timer); \
+ fail_timer.function = reenable_sysctl; \
+ fail_timer.data = (unsigned long)NULL; \
+ fail_timer.expires = \
+ jiffies + LIDS_TTW_FAIL * HZ; \
+ add_timer(&fail_timer); \
+ } \
+ } \
+}while(0);
+#else
+#define lids_process_password() \
+do{ \
+ if ((lids_first_time) && (!locks.passwd[0])) { \
+ /* access granted ! */ \
+ number_failed = 0; \
+ if (lids_process_flags(locks.flags) == 0) { \
+ if (lids_first_time || \
+ lids_flag_raised(locks.flags, \
+ LIDS_FLAGS_RELOAD_CONF)\
+ || lids_flag_raised(locks.flags, \
+ LIDS_FLAGS_SHUTDOWN))\
+ cap_bset = lids_cap_val; \
+ else \
+ cap_bset = locks.cap_bset; \
+ lids_security_alert \
+ ("Changed: cap_bset=0x%x lids_flags=0x%x",\
+ cap_t(cap_bset), lids_flags); \
+ } \
+ lids_first_time = 0;\
+ lids_security_alert \
+ ("Attempt %d to switch caps/flags with caps=0x%x and flags=0x%x (feature disabled)",\
+ number_failed, cap_t(locks.cap_bset), locks.flags);\
+ } \
+}while(0);
+#endif
+
+#ifdef CONFIG_LIDS_ALLOW_SWITCH
+char lids_pw[LIDS_PW_LEN+16];
+int lids_read_pw()
+{
+ struct file *filp;
+ char buffer[LIDS_PW_LEN];
+ mm_segment_t oldfs;
+ int bytes;
+ int error = 0;
+
+ filp = filp_open(LIDS_PW_FILE, O_RDONLY, 0);
+ if (IS_ERR(filp) || (filp == NULL)) {
+ error = -1;
+ printk("LIDS: Error opening passwd file " LIDS_PW_FILE
+ ". Does it exist?\n");
+ return error;
+ }
+
+ if (filp->f_op->read == NULL) {
+ fput(filp);
+ error = -3;
+ printk("LIDS: The file " LIDS_PW_FILE " can not be read\n");
+ return error;
+ }
+
+ /* Now read LIDS_PW_LEN bytes from postion "StartPos" */
+ filp->f_pos = 0;
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ bytes = filp->f_op->read(filp, buffer, LIDS_PW_LEN, &filp->f_pos);
+ set_fs(oldfs);
+
+ if (bytes < LIDS_PW_LEN) {
+ printk("LIDS: The file " LIDS_PW_FILE " is too short, need %d, got %d\n", LIDS_PW_LEN, bytes);
+ return -1;
+ }
+
+ memset(lids_pw,'\0',LIDS_PW_LEN);
+ memcpy(lids_pw, buffer, LIDS_PW_LEN);
+ /* Close the file */
+ fput(filp);
+ return error;
+}
+#else
+int lids_read_pw()
+{
+ return 0;
+}
+#endif
diff -Nru linux-2.6.21.1.org/security/lids/include/linux/lidsext.h linux-2.6.21.1/security/lids/include/linux/lidsext.h
--- linux-2.6.21.1.org/security/lids/include/linux/lidsext.h 1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.21.1/security/lids/include/linux/lidsext.h 2007-05-22 11:36:54.000000000 +0900
@@ -0,0 +1,116 @@
+#ifndef LIDSEXT_H
+#define LIDSEXT_H
+
+/*
+ * This file contains LIDS macros needed for logging and debugging,
+ * used about everywhere in the kernel.
+ *
+ */
+
+/* needed extern declarations */
+
+#include <linux/autoconf.h>
+
+extern void lids_cap_log(int);
+extern void lids_ext_cap_log(int);
+extern int lids_cap_time_checker(const int);
+extern int lids_local_off(void);
+extern int lids_reload_conf;
+extern int lids_load;
+extern int lids_local_on;
+extern int lids_local_pid;
+extern int lids_first_time;
+extern int lids_state;
+
+#ifdef CONFIG_LIDS_DEBUG
+#define LIDS_DEBUG
+#endif
+
+#define LIDS_STR2(x) #x
+#define LIDS_STR(X) LIDS_STR2(X)
+
+#ifdef LIDS_DEBUG
+#define LIDS_DBG(fmt, arg...) \
+ printk(KERN_DEBUG "LIDS: %s:%i: " fmt, \
+ __FUNCTION__, __LINE__, ## arg)
+#else
+#define LIDS_DBG(fmt, arg...)
+#endif
+
+#ifdef CONFIG_LIDS_RESTRICT_MODE_SWITCH
+
+static inline int
+lids_check_tty(struct tty_struct *tty)
+{
+ return (tty && !(0
+#ifdef CONFIG_LIDS_MODE_SWITCH_CONSOLE
+ || tty->driver->type == TTY_DRIVER_TYPE_CONSOLE
+#endif
+#ifdef CONFIG_LIDS_MODE_SWITCH_SERIAL
+ || tty->driver->type == TTY_DRIVER_TYPE_SERIAL
+#endif
+#ifdef CONFIG_LIDS_MODE_SWITCH_PTY
+ || tty->driver->type == TTY_DRIVER_TYPE_PTY
+#endif
+ ));
+}
+#else
+static inline int
+lids_check_tty(struct tty_struct *tty)
+{
+ return 0;
+}
+#endif /* CONFIG_LIDS_RESTRICT_MODE_SWITCH */
+
+extern void lids_log(int flood, const char *message, ...);
+
+#define LIDS_TIMEOUT_AFTER_FLOOD 60
+
+#ifdef CONFIG_LIDS_NO_FLOOD_LOG
+
+#define lids_security_alert(message, args...) \
+do { \
+ if (lids_load && lids_local_load) { \
+ static unsigned long warning_time = 0, no_flood_yet = 0; \
+ static spinlock_t lids_security_alert_lock = SPIN_LOCK_UNLOCKED; \
+ \
+ spin_lock(&lids_security_alert_lock); \
+ \
+/* Make sure at least LIDS_TIMEOUT_AFTER_FLOOD \
+ * passed since the last warning logged \
+ */ \
+ if ((!warning_time) || \
+ (jiffies-warning_time > LIDS_TIMEOUT_AFTER_FLOOD*HZ)) { \
+ warning_time = jiffies; no_flood_yet = 1; \
+ lids_log(0, message , ## args); \
+ } else if (no_flood_yet) { \
+ warning_time = jiffies; no_flood_yet = 0; \
+ lids_log(1, message , ## args); \
+ } \
+ spin_unlock(&lids_security_alert_lock); \
+ } \
+} while(0)
+
+#else /* CONFIG_LIDS_NO_FLOOD_LOG */
+
+#define lids_security_alert(message, args...) \
+do { \
+ if (lids_load && lids_local_load) { \
+ static spinlock_t lids_security_alert_lock = SPIN_LOCK_UNLOCKED; \
+ \
+ spin_lock(&lids_security_alert_lock); \
+ lids_log(0, message , ## args); \
+ spin_unlock(&lids_security_alert_lock); \
+ } \
+} while(0)
+
+#endif /* CONFIG_LIDS_NO_FLOOD_LOG */
+
+//#ifdef CONFIG_LIDS_ALLOW_SWITCH
+#if 1
+#define lids_local_load ( lids_local_on || (!lids_local_off()) )
+#else
+#define lids_local_load 1
+#endif /* CONFIG_LIDS_ALLOW_SWITCH */
+
+#endif /* LIDSEXT_H */
diff -Nru linux-2.6.21.1.org/security/lids/include/linux/lidsif.h linux-2.6.21.1/security/lids/include/linux/lidsif.h
--- linux-2.6.21.1.org/security/lids/include/linux/lidsif.h 1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.21.1/security/lids/include/linux/lidsif.h 2007-05-22 11:36:54.000000000 +0900
@@ -0,0 +1,227 @@
+#ifndef LIDSIF_H
+#define LIDSIF_H
+
+/*
+ * This file contains every definitions needed for interfacing
+ * kernel part and user space part of LIDS
+ *
+ */
+
+/*
+ * If the file is not compiled for the kernel,
+ * it must include replacement file which contains
+ * a copy of every internal structure needed
+ *
+ */
+#ifdef __KERNEL__
+#include <linux/kdev_t.h>
+#include <linux/capability.h>
+#else
+#include <kernel_inc.h>
+#include <linux/dcache.h>
+#include <limits.h>
+#endif
+
+/* LIDS add-on Capabilities */
+/* Allow to hide the proceed from the system */
+#define CAP_HIDDEN 29
+
+/* Allow the process to KILL the init children */
+#define CAP_KILL_PROTECTED 30
+
+#define CAP_PROTECTED 31
+
+/*
+ * Here begin the common structures, shared by LIDS and
+ * lidstools
+ *
+ */
+
+#define LIDS_FLAGS_LIDS_ON 0
+#define LIDS_FLAGS_RELOAD_CONF 1
+#define LIDS_FLAGS_LIDS_LOCAL_ON 2
+#define LIDS_FLAGS_STATUS 3
+#define LIDS_FLAGS_INIT 4
+#define LIDS_FLAGS_POSTBOOT 5
+#define LIDS_FLAGS_SHUTDOWN 6
+#define LIDS_FLAGS_ACL_DISCOVERY_ON 7
+
+/*
+ * ACL target.
+ */
+
+#define LIDS_DENY 0 /* DENY ACCESS */
+#define LIDS_READONLY 1 /* Read Only File */
+#define LIDS_APPEND 2 /* APPEND ONLY FILE */
+#define LIDS_WRITE 4 /* Protect Writing to device */
+#define LIDS_IGNORE 8 /* Ignore the protection */
+#define LIDS_CAP 16 /* acl type is capability */
+#define LIDS_SOCKET 32 /* acl type is socket */
+#define LIDS_SOCKET_ENABLE 33 /* acl type is socket with Enable */
+
+/* SOCKET CAP */
+
+#define LIDS_SOCKET_CREATE 0
+#define LIDS_SOCKET_CONNECT 1
+#define LIDS_SOCKET_BIND 2
+#define LIDS_SOCKET_LISTEN 3
+#define LIDS_SOCKET_ACCEPT 4
+#define LIDS_SOCKET_SENDMSG 5
+#define LIDS_SOCKET_RECVMSG 6
+#define LIDS_SOCKET_GETSOCKNAME 7
+#define LIDS_SOCKET_GETPEERNAME 8
+#define LIDS_SOCKET_GETSOCKOPT 9
+#define LIDS_SOCKET_SETSOCKOPT 10
+#define LIDS_SOCKET_SHUTDOWN 11
+#define LIDS_SOCKET_CREATE_TCP 12
+#define LIDS_SOCKET_CREATE_UDP 13
+#define LIDS_SOCKET_NF_MARK 14
+#define LIDS_EXEC 15
+#define LIDS_CAP_PROTECTED 16
+#define LIDS_CAP_KILL_PROTECTED 17
+
+/* LIDS STATE */
+#define LIDS_STATE_GLOBAL 0
+#define LIDS_STATE_BOOT 1
+#define LIDS_STATE_POSTBOOT 2
+#define LIDS_STATE_SHUTDOWN 3
+
+/* CONF FILE definition */
+#define LIDS_CONF_DIR "/etc/lids"
+
+#define LIDS_PW_FILE "/etc/lids/lids.pw"
+#define LIDS_PW_LEN 32
+
+#define XATTR_NAME_LIDS "security.lids"
+#define XATTR_NAME_LIDS_BOOT "security.lids.boot"
+#define XATTR_NAME_LIDS_POSTBOOT "security.lids.postboot"
+#define XATTR_NAME_LIDS_SHUTDOWN "security.lids.shutdown"
+
+#define LIDS_BOOT_ACL_FILE "/etc/lids/lids.boot.acl" /* the acligure boot file */
+#define LIDS_POSTBOOT_ACL_FILE "/etc/lids/lids.postboot.acl" /* the acligure boot file */
+#define LIDS_SHUTDOWN_ACL_FILE "/etc/lids/lids.shutdown.acl" /* the acligure boot file */
+
+#ifdef CONFIG_LIDS_SHRINK_SIZE
+#define LIDS_BOOT_ACL_SIZEINFO_FILE "/etc/lids/lids.boot.acl.sz"
+#define LIDS_POSTBOOT_ACL_SIZEINFO_FILE "/etc/lids/lids.postboot.acl.sz"
+#define LIDS_SHUTDOWN_ACL_SIZEINFO_FILE "/etc/lids/lids.shutdown.acl.sz"
+#endif
+/*
+ * Me ? Paranoiac !?
+ *
+ * The magic numbers are all around the encrypted password.
+ * They have a null byte to bother ASCIIZ functions.
+ */
+
+#define LIDS_MAGIC 0x5344494c
+#define LIDS_MAGIC_1 0x004e6741
+#define LIDS_MAGIC_2 0x68002d62
+#define LIDS_MAGIC_3 0xe68400c3
+#define LIDS_MAGIC_4 0xd94aa400
+
+#define LIDS_FLAG_FULL_SET (~0)
+#define LIDS_FLAG_TO_MASK(flag) (1 << (flag))
+#define lids_flag_raise(flag, bit) ((flag) |= LIDS_FLAG_TO_MASK(bit))
+#define lids_flag_lower(flag, bit) ((flag) &= ~LIDS_FLAG_TO_MASK(bit))
+#define lids_flag_raised(flag, bit) ((flag) & LIDS_FLAG_TO_MASK(bit) & LIDS_FLAG_FULL_SET)
+
+#define LIDS_TIME_ITEM 2
+#define LIDS_PORT_ITEM 16
+#define LIDS_MAX_TRY 3
+#define LIDS_TTW_FAIL 3
+
+#define LIDS_MAX_XATTR_LEN 8096
+
+typedef __u32 lids_flags_t;
+
+typedef char passwd_t[64];
+
+typedef struct lids_locks_s {
+ __u32 magic1;
+ kernel_cap_t cap_bset;
+ __u32 magic2;
+ lids_flags_t flags;
+ __u32 magic3;
+ passwd_t passwd;
+ __u32 magic4;
+} __attribute__ ((__packed__)) lids_locks_t ;
+
+struct lids_s_dev {
+ __u32 major;
+ __u32 minor;
+} __attribute__ ((__packed__));
+
+struct lids_s_inode {
+ __u32 ino;
+ struct lids_s_dev dev;
+} __attribute__ ((__packed__));
+struct lids_cap {
+ int inherit; /* this capabilities inherit level */
+} __attribute__ ((__packed__));
+
+struct lids_object_acl {
+ __u32 sid; /* subject id*/
+ __u32 oid; /* object id*/
+ struct lids_s_inode inode; /* point the the original inode */
+ __u32 type; /* READ WRITE APPEND DENY */
+ __u32 inherit; /* the inherit level */
+ struct lids_object_acl *next;
+#ifdef __KERNEL__
+ char name[64]; /* filename of the inode */
+#else
+ char name[PATH_MAX]; /* filename of the inode */
+#endif
+} __attribute__ ((__packed__)) ;
+
+struct lids_subject_acl {
+ __u32 sid; /* sid */
+ __u32 ext_cap; /* socket */
+ __u32 sys_cap; /* Move from tsk */
+ __u32 o_acl_num; /* the object number */
+ __u32 port[16][2]; /* bind port */
+ struct lids_cap cap_inherit[32]; /* inheritable array */
+ struct lids_object_acl *o_acl; /* object acl */
+} __attribute__ ((__packed__)) ;
+
+#ifdef __KERNEL__
+struct lids_task_acl {
+ __u32 magic;
+ struct task_struct *task; /* back to the pointer */
+ struct lids_subject_acl *s_acl;
+ struct list_head list;
+ spinlock_t t_lock; /* lock */
+
+} __attribute__ ((__packed__));
+#endif
+struct lids_perm {
+ __u32 sid;
+ __u32 oid;
+ __u32 type;
+} __attribute__ ((__packed__));
+
+struct lids_inode_acl {
+ __u32 magic;
+ __u32 type; /* READ WRITE APPEND DENY */
+ __u32 version; /* current vesion of acl*/
+ __u32 flags; /* inode flags */
+ struct lids_s_inode inode; /* point the the original inode */
+ struct lids_perm perm[64]; /* the sid/oid that have perm on this file */
+ struct lids_subject_acl *s_acl;
+#ifdef __KERNEL__
+ char name[64]; /* filename of the inode */
+#else
+ char name[PATH_MAX]; /* filename of the inode */
+#endif
+} __attribute__ ((__packed__)) ;
+struct lids_acl_header{
+ __u32 magic; /* MAGIC */
+ __u32 version; /* ACL Version */
+ __u32 sys_cap; /* Overall Cap */
+ __u32 ext_cap; /* Overall Ext Cap */
+ __u32 discovery; /* Discovery Mode*/
+ __u32 search; /* Search Matrix*/
+ __u32 u_size; /* user size */
+ struct lids_s_inode lidsadm; /* lidsadm's inode value*/
+} __attribute__ ((__packed__));
+
+#endif
diff -Nru linux-2.6.21.1.org/security/lids/lids_acl.c linux-2.6.21.1/security/lids/lids_acl.c
--- linux-2.6.21.1.org/security/lids/lids_acl.c 1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.21.1/security/lids/lids_acl.c 2007-05-22 11:36:54.000000000 +0900
@@ -0,0 +1,1164 @@
+/*
+ * LIDS ACL functions
+ *
+ * Copyright (C) 2002,2004 Huagang Xie <xie@lids.org>
+ * Copyright (C) 2002,2003 Philippe Biondi <biondi@cartel-securite.fr>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+/*
+ * Changes:
+ *
+ * [Oct 14 1999, Xie Huagang] initial creation
+ * [Sep 26 2000, Xie Huagang] Port to linux 2.4.0-test8
+ * [Feb 23 2003, Xie Huagang] LSM support for 2.5.x
+ */
+
+#include <linux/mm.h>
+#include <linux/proc_fs.h>
+#include <linux/smp_lock.h>
+#include <linux/quotaops.h>
+#include <asm/uaccess.h>
+#include <asm/unaligned.h>
+#include <asm/semaphore.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/namei.h>
+#include <linux/time.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/highmem.h>
+#include <linux/slab.h>
+#include <linux/file.h>
+#include <linux/autoconf.h>
+#include <linux/tty.h>
+#include <linux/sysctl.h>
+
+#include <linux/version.h>
+#include <linux/lids.h>
+#include <linux/lidsext.h>
+#include <linux/lidsif.h>
+
+ /***********************************************************************
+ * General variables
+ ***********************************************************************/
+int lids_load = 1;
+int lids_local_on = 1;
+int lids_acl_discovery = 0; /* */
+lids_flags_t lids_flags = 0;
+int lids_local_pid = 0;
+u32 lids_current = 0;
+int lids_first_time = 1;
+
+int lids_state = LIDS_STATE_BOOT; /* initial state is boot */
+
+void *b11;
+static int lids_get_inode_security(struct dentry *o_dentry,
+ struct inode *inode);
+
+/*
+ * Free routine
+ *
+ */
+static void
+lids_free_object_acl(struct lids_object_acl *o_acl)
+{
+ struct lids_object_acl *p;
+
+ if (!o_acl)
+ return;
+
+ while (o_acl) {
+ p = o_acl->next;
+ kfree(o_acl);
+ o_acl = p;
+ }
+}
+
+void
+lids_free_subject_acl(struct lids_subject_acl *s_acl)
+{
+ struct lids_object_acl *o_acl;
+
+ if (!s_acl)
+ return;
+
+ o_acl = s_acl->o_acl;
+ lids_free_object_acl(o_acl);
+ kfree(s_acl);
+}
+
+void
+lids_free_inode_acl(struct lids_inode_acl *i_acl)
+{
+ if (!i_acl)
+ return;
+ if (i_acl->magic != LIDS_MAGIC)
+ return;
+
+ lids_free_subject_acl(i_acl->s_acl);
+ kfree(i_acl);
+}
+
+/*
+ * free the lids acl structure here
+ */
+void
+lids_free_task_acl(struct lids_task_acl *task_acl)
+{
+ struct lids_subject_acl *s_acl;
+
+ if (!task_acl)
+ return;
+
+ s_acl = task_acl->s_acl;
+ lids_free_subject_acl(s_acl);
+ kfree(task_acl);
+ return;
+}
+
+/*
+ * lids allocation routine
+ */
+static struct lids_task_acl *
+lids_alloc_task_acl(struct task_struct *task)
+{
+ struct lids_task_acl *task_acl;
+
+ task_acl = kmalloc(sizeof (struct lids_task_acl), GFP_ATOMIC);
+ if (!task_acl) {
+ printk(KERN_INFO "LIDS: kmalloc error for task_acl\n");
+ return NULL;
+ }
+ task_acl->magic = LIDS_MAGIC;
+ task_acl->task = task;
+ task_acl->s_acl = NULL;
+ INIT_LIST_HEAD(&task_acl->list);
+ spin_lock_init(&task_acl->t_lock);
+
+ task_lock(task);
+ task->security = task_acl;
+ task_unlock(task);
+
+ return task_acl;
+}
+
+/***********************************************************************
+ ***********************************************************************
+ *
+ * LIDS protection management
+ *
+ ***********************************************************************
+ ***********************************************************************/
+
+int
+lids_local_off(void)
+{
+ struct task_struct *t;
+
+ rcu_read_lock();
+ t = current;
+ while (t && (t->pid > 1)) {
+ if (t->pid == lids_local_pid) {
+ rcu_read_unlock();
+ return 1;
+ }
+ t = t->parent;
+ }
+ rcu_read_unlock();
+ return 0;
+}
+
+/*
+ *
+ * LIDS ACL Function
+ *
+ */
+static int
+lids_check_acl_inode(struct inode *inode, int type)
+{
+
+ struct lids_task_acl *task_acl = current->security;
+ struct lids_object_acl *o_acl;
+ struct lids_inode_acl *i_acl= inode->i_security;
+ //time_t currenttime;
+ int i=0;
+
+
+ if (!(task_acl && task_acl->s_acl))
+ return -EPERM;
+
+ while (i_acl->perm[i].sid != 0 && i< 64) {
+
+ o_acl = task_acl->s_acl->o_acl;
+ while(o_acl) {
+ if ( i_acl->perm[i].sid == o_acl->sid &&
+ i_acl->perm[i].oid == o_acl->oid ) {
+
+ return type & i_acl->perm[i].type ? 0 : -EPERM;
+ }
+ o_acl = o_acl->next;
+ }
+ i++;
+ }
+ return -EPERM;
+}
+#if 0
+void show_lids_sec(struct lids_inode_acl *i_acl)
+{
+ struct lids_subject_acl *s_acl;
+ struct lids_object_acl *o_acl;
+
+ if(!i_acl) return;
+ printk("\tshow: inode: %s, %d\n",i_acl->name, i_acl->type);
+ s_acl = i_acl->s_acl;
+ if(!s_acl) return;
+ printk("\t -- cap %x \n",s_acl->sys_cap);
+ o_acl = s_acl->o_acl;
+ if(!o_acl) return;
+ while(o_acl) {
+ printk("\t -- obj [%s] type %d inherit %d\n",o_acl->name,o_acl->type,o_acl->inherit);
+ o_acl = o_acl->next;
+ }
+}
+#endif
+/*
+* ACLS computed routine.
+*/
+static int
+lids_compute_inherit_acl(struct lids_subject_acl *current_s_acl,
+ struct lids_subject_acl *computed_s_acl)
+{
+ struct lids_object_acl *src_acl, *dst_acl;
+
+ computed_s_acl->o_acl = NULL;
+ src_acl = current_s_acl->o_acl;
+
+ while (src_acl) {
+ if (src_acl->inherit != 0) {
+ dst_acl =
+ kmalloc(sizeof (struct lids_object_acl),
+ GFP_KERNEL);
+ if (!dst_acl) {
+ LIDS_DBG("kmalloc failed\n");
+ lids_free_subject_acl(computed_s_acl);
+ return -ENOMEM;
+ }
+ memcpy(dst_acl, src_acl,
+ sizeof (struct lids_object_acl));
+ if (dst_acl->inherit > 0)
+ dst_acl->inherit--;
+
+ LIDS_DBG
+ (" +++ pid %i: 1 ACL inherited. remaining TTL : %i\n",
+ current->pid, dst_acl->inherit);
+
+ dst_acl->next = computed_s_acl->o_acl;
+ computed_s_acl->o_acl = dst_acl;
+
+ } else {
+ LIDS_DBG
+ (" + pid %i: 1 ACL not inherited: TTL elapsed.\n",
+ current->pid);
+ }
+ src_acl = src_acl->next;
+ }
+ LIDS_DBG("%s: = pid %i: %s inherit acls\n", __FUNCTION__, current->pid,
+ computed_s_acl->o_acl ? "does" : "does not");
+ return 0;
+}
+
+static void
+lids_compute_inherit_cap(struct lids_subject_acl *current_s_acl,
+ struct lids_subject_acl *computed_s_acl)
+{
+ int i;
+
+ computed_s_acl->ext_cap = current_s_acl->ext_cap;
+
+ if (!current_s_acl->sys_cap)
+ return;
+ computed_s_acl->sys_cap = 0;
+ /* reset the cap_inherit */
+ for (i = 0; i < 32; i++) {
+ if (test_bit(i, (void *)¤t_s_acl->sys_cap) &&
+ (current_s_acl->cap_inherit[i].inherit != 0)) {
+ set_bit(i, (void *)&computed_s_acl->sys_cap);
+ memcpy(&computed_s_acl->cap_inherit[i],
+ ¤t_s_acl->cap_inherit[i],
+ sizeof (struct lids_cap));
+ if (current_s_acl->cap_inherit[i].inherit > 0)
+ computed_s_acl->cap_inherit[i].inherit--;
+ }
+ }
+ LIDS_DBG("%s: %d current %x computed %x\n",__FUNCTION__, current->pid, current_s_acl->sys_cap, computed_s_acl->sys_cap);
+
+}
+
+static int
+lids_compute_new_acl(struct lids_subject_acl *new_s_acl,
+ struct lids_subject_acl *computed_s_acl)
+{
+ struct lids_object_acl *src_acl, *dst_acl;
+
+ src_acl = new_s_acl->o_acl;
+ computed_s_acl->o_acl = NULL;
+ while (src_acl) {
+ LIDS_DBG(" + pid %i: getting a new fs ACL, %s type %d inherit %d\n", current->pid,src_acl->name, src_acl->type, src_acl->inherit);
+ dst_acl = kmalloc(sizeof (struct lids_object_acl), GFP_KERNEL);
+ if (!dst_acl) {
+ LIDS_DBG("kmalloc failed\n");
+ return -3;
+ }
+ memcpy(dst_acl, src_acl, sizeof (struct lids_object_acl));
+ dst_acl->next = computed_s_acl->o_acl;
+ computed_s_acl->o_acl = dst_acl;
+ src_acl = src_acl->next;
+ }
+ return 0;
+}
+
+static void
+lids_compute_new_cap(struct lids_subject_acl *new_s_acl,
+ struct lids_subject_acl *computed_s_acl)
+{
+ int i;
+
+ computed_s_acl->sys_cap |= new_s_acl->sys_cap;
+
+ /* 0. SOCKET inherit FIXME later */
+ computed_s_acl->ext_cap |= new_s_acl->ext_cap;
+ /* if its parent do not has mark, use its own */
+ memcpy(computed_s_acl->port, new_s_acl->port, sizeof(computed_s_acl->port));
+
+ for (i = 0; i < 32; i++) {
+ /* Here we do an unsigned comparison for -1 to be the biggest number */
+ if (test_bit(i, (void *)&new_s_acl->sys_cap) &&
+ ((u32) computed_s_acl->cap_inherit[i].inherit <
+ (u32) new_s_acl->cap_inherit[i].inherit)) {
+
+ computed_s_acl->cap_inherit[i].inherit =
+ new_s_acl->cap_inherit[i].inherit;
+ }
+ }
+}
+
+/*
+ * lids_set_acls, this_sys_acl must be NOT NULL.
+ * protected if the flag for current process, if it is under protected, protected = 1, otherwise = 0
+ */
+int
+lids_compute_acls(struct lids_subject_acl *current_s_acl,
+ struct lids_subject_acl *new_s_acl,
+ struct lids_subject_acl *computed_s_acl, int protect)
+{
+
+ memset(computed_s_acl, 0, sizeof (struct lids_subject_acl));
+
+ if (current_s_acl) {
+
+ LIDS_DBG("%s: + pid %i: inherit ACLs: %lx ext %lx port %d oacl %p\n",__FUNCTION__,
+ current->pid, current_s_acl->sys_cap,
+ current_s_acl->ext_cap,current_s_acl->port[0][0],
+ current_s_acl->o_acl);
+
+ lids_compute_inherit_cap(current_s_acl, computed_s_acl);
+
+ if (protect) {
+ if (lids_compute_inherit_acl
+ (current_s_acl, computed_s_acl) < 0)
+ return -ENOMEM;
+ }
+ }
+
+ if (new_s_acl && protect) {
+
+ LIDS_DBG
+ ("%s: + pid %i: getting new ACLs: cap %lx, ext_cap %lx computed %lx, ext %lx port %d oacl %p\n",__FUNCTION__,
+ current->pid, new_s_acl->sys_cap, new_s_acl->ext_cap,
+ new_s_acl->ext_cap, computed_s_acl->ext_cap,
+ new_s_acl->port[0][0],
+ new_s_acl->o_acl);
+
+ lids_compute_new_cap(new_s_acl, computed_s_acl);
+
+ if (lids_compute_new_acl(new_s_acl, computed_s_acl) < 0) {
+ return -ENOMEM;
+ }
+
+ }
+
+ LIDS_DBG("%s: = pid %i: final caps : %#lx ext_cap = %lx port %d o_acl = %p\n",
+ __FUNCTION__, current->pid, computed_s_acl->sys_cap,
+ computed_s_acl->ext_cap, computed_s_acl->port[0][0], computed_s_acl->o_acl);
+
+
+ return 0;
+}
+
+/*
+ * apply the acl to task->security
+ */
+void
+lids_set_task_acl(struct lids_subject_acl *s_acl, struct task_struct *task)
+{
+ struct lids_task_acl *acl = task->security;
+
+ if (!task || !s_acl) {
+ printk(KERN_INFO "LIDS: %s:yee..bug!\n", __FUNCTION__);
+ return;
+ }
+ if (s_acl) {
+ /* check this acl, to see if it really contain an ACL */
+ if (s_acl->sys_cap == 0 && s_acl->o_acl == NULL &&
+ s_acl->ext_cap == 0) {
+ lids_free_subject_acl(s_acl);
+ /* lock ?? */
+ spin_lock(&acl->t_lock);
+ acl->s_acl = NULL;
+ spin_unlock(&acl->t_lock);
+ } else {
+ /* lock ?? */
+ spin_lock(&acl->t_lock);
+ acl->s_acl = s_acl;
+ spin_unlock(&acl->t_lock);
+ LIDS_DBG(" pid %i: set caps : %#lx\n", task->pid,
+ s_acl->sys_cap);
+ }
+ }
+ return;
+}
+
+static struct lids_subject_acl *
+lids_copy_subject_acl(struct lids_subject_acl *src)
+{
+
+ struct lids_object_acl *s, *d;
+ struct lids_subject_acl *dst;
+
+ dst = (struct lids_subject_acl *)
+ kmalloc(sizeof (struct lids_subject_acl), GFP_KERNEL);
+ if (!dst) {
+ LIDS_DBG("kmalloc error\n");
+ return NULL;
+ }
+ memcpy(dst, src, sizeof (struct lids_subject_acl));
+
+ /* 1 . copy lids_acl */
+ dst->o_acl = NULL;
+ s = src->o_acl;
+ while (s) {
+ d = kmalloc(sizeof (struct lids_object_acl), GFP_KERNEL);
+ if (!d) {
+ LIDS_DBG("kmalloc error\n");
+ lids_free_subject_acl(dst);
+ return NULL;
+ }
+ memcpy(d, s, sizeof (struct lids_object_acl));
+ d->next = dst->o_acl;
+ dst->o_acl = d;
+ s = s->next;
+ }
+
+ return dst;
+}
+
+/***********************************************************************
+ *
+ * lids_check_base();
+ *
+ * check if the base have been protected by the IDS system.
+ * use the base->d_parent
+ * check if the requried access can be permitted
+ */
+
+int
+lids_check_base(struct dentry *dentry, int flag)
+{
+ struct inode *inode = dentry->d_inode;
+ struct lids_inode_acl *i_acl;
+ int error;
+
+ if (inode == NULL)
+ return 0;
+
+ error = lids_get_inode_security(dentry, inode);
+ if (error) {
+ printk("%s: yeee. [%s] error ??\n",__FUNCTION__, dentry->d_iname);
+ return -EPERM;
+ }
+
+ i_acl = (struct lids_inode_acl *) inode->i_security;
+
+ LIDS_DBG("%s: LIDS ACL: i_acl= %p, name=[%s], inode = %d\n",
+ __FUNCTION__, i_acl, dentry->d_iname, inode->i_ino);
+ /* if it is a socket or link .. */
+ if (i_acl == NULL) {
+ return 0;
+ }
+ /* do not have any acl */
+ if(i_acl->type == 0xffffffff) {
+ return 0;
+ }
+
+ if (((i_acl->type) & flag) > 0)
+ return 0;
+
+ return lids_check_acl_inode(inode, flag);
+}
+
+static int
+lids_get_task_acl(struct task_struct *task, struct lids_task_acl *task_acl,
+ struct lids_inode_acl *i_acl)
+{
+ struct lids_subject_acl *task_s_acl = NULL;
+ struct lids_subject_acl *current_s_acl = NULL;
+ struct lids_subject_acl *new_s_acl = NULL;
+ struct lids_subject_acl *computed_s_acl = NULL;
+ struct lids_task_acl *current_task_acl = task->security;
+ int retval = 0;
+
+ LIDS_DBG("%s:##### pid %i ppid %d\n", __FUNCTION__, task->pid,
+ task->parent->pid);
+
+ /* if no acl for itself and its parent has not acl */
+ if (i_acl)
+ new_s_acl = i_acl->s_acl;
+ if (task_acl)
+ task_s_acl = task_acl->s_acl;
+ /* if no acl with this inode and not for its parent */
+ if (!new_s_acl && !task_s_acl) {
+ return 0;
+ }
+
+ if (current_task_acl == NULL) {
+ current_task_acl = lids_alloc_task_acl(task);
+ if (current_task_acl == NULL) {
+ printk(KERN_INFO
+ "LIDS: kmalloc memeory for task acl\n");
+ return -ENOMEM;
+ }
+ } else {
+ if (current_task_acl->magic != LIDS_MAGIC) {
+ printk
+ (KERN_INFO
+ "LIDS: Bug!! task security magic mismatch!\n");
+ /* return 0? */
+ return 0;
+ }
+ }
+ current_s_acl = current_task_acl->s_acl;
+
+ /* check if this program is protected or not */
+ if (i_acl && (i_acl->type & LIDS_APPEND) == 0) {
+ /* task and its parent do not have acl */
+ computed_s_acl =
+ kmalloc(sizeof (struct lids_subject_acl), GFP_KERNEL);
+ if (computed_s_acl == NULL) {
+ printk(KERN_INFO
+ "LIDS: kmalloc error for computed acl\n");
+ retval = -ENOMEM;
+ goto out;
+ }
+
+ if (lids_compute_acls(task_s_acl, new_s_acl, computed_s_acl, 1)
+ < 0) {
+ lids_free_subject_acl(computed_s_acl);
+ retval = -EPERM;
+ goto out;
+ }
+
+ LIDS_DBG("%s: LIDS: protected pid %d %d get acl\n",
+ __FUNCTION__, task->pid, task->parent->pid);
+
+ spin_lock(¤t_task_acl->t_lock);
+ current_task_acl->s_acl = computed_s_acl;
+ spin_unlock(¤t_task_acl->t_lock);
+ } else {
+
+ /* reset all the privileges */
+ /* maybe we need some locks here */
+ if (task_s_acl) {
+
+ computed_s_acl =
+ kmalloc(sizeof (struct lids_subject_acl),
+ GFP_KERNEL);
+ if (computed_s_acl == NULL) {
+ printk
+ (KERN_INFO
+ "LIDS: kmalloc error for computed acl\n");
+ retval = -ENOMEM;
+ goto out;
+ }
+ retval =
+ lids_compute_acls(task_s_acl, NULL, computed_s_acl,
+ 0);
+ if (retval < 0) {
+ lids_free_subject_acl(computed_s_acl);
+ retval = -EPERM;
+ goto out;
+ }
+ /* restrict socket access found */
+ /* remove the capability but leave socket */
+ if (computed_s_acl->ext_cap != 0) {
+ LIDS_DBG
+ ("LIDS: unprotected pid %d %d get socket inheritance\n",
+ task->pid, task->parent->pid);
+ lids_free_object_acl(computed_s_acl->o_acl);
+ computed_s_acl->o_acl = NULL;
+ computed_s_acl->sys_cap = 0;
+ memset(computed_s_acl->cap_inherit, 0,
+ 32 * sizeof (struct lids_cap));
+ spin_lock(¤t_task_acl->t_lock);
+ current_task_acl->s_acl = computed_s_acl;
+ spin_unlock(¤t_task_acl->t_lock);
+ } else {
+ /* clean the task */
+ task_lock(task);
+ task->security = NULL;
+ task_unlock(task);
+ lids_free_subject_acl(computed_s_acl);
+ spin_lock(¤t_task_acl->t_lock);
+ current_task_acl->s_acl = NULL;
+ spin_unlock(¤t_task_acl->t_lock);
+ }
+ }
+ }
+ out:
+ lids_free_subject_acl(current_s_acl);
+
+ current_s_acl = current_task_acl->s_acl;
+ if (!current_s_acl) {
+ task_lock(task);
+ task->security = NULL;
+ task_unlock(task);
+ lids_free_task_acl(current_task_acl);
+ }
+ return retval;
+}
+
+/* lids task acl */
+static LIST_HEAD(lids_init_head);
+static spinlock_t lids_init_lock = SPIN_LOCK_UNLOCKED;
+
+static int
+lids_push_task_acl(struct task_struct *task)
+{
+ struct lids_task_acl *task_acl;
+
+ /* init, ignore it */
+ if (task->parent->pid == 0)
+ return 0;
+
+ LIDS_DBG("%s: pushing %d %d\n", __FUNCTION__, task->pid,
+ task->parent->pid);
+ task_acl = task->security;
+ /* it maybe have acl when switch within states */
+ if (!task_acl) {
+ /* can not sleep */
+ task_acl = lids_alloc_task_acl(task);
+ if (!task_acl) {
+ return -ENOMEM;
+ }
+ }
+ /* can I hold a lock */
+ spin_lock(&lids_init_lock);
+ if (list_empty(&task_acl->list))
+ list_add(&task_acl->list, &lids_init_head);
+ spin_unlock(&lids_init_lock);
+ return 0;
+}
+
+/*
+ *
+ */
+struct dentry *
+lids_get_task_dentry(struct task_struct *task)
+{
+ struct dentry *dentry = NULL;
+ struct vm_area_struct *vma;
+
+ if (task->mm) {
+ vma = task->mm->mmap;
+ while (vma) {
+ if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) {
+ dentry = vma->vm_file->f_dentry;
+ break;
+ }
+ vma = vma->vm_next;
+ }
+ }
+ return dentry;
+}
+
+static int
+lids_attach_task_acl(struct task_struct *task)
+{
+ struct lids_task_acl *task_acl;
+ struct dentry *dentry = NULL;
+ int retval;
+
+ /* Get dentry of current process, if any */
+
+ dentry = lids_get_task_dentry(task);
+ if (!dentry)
+ return 0;
+
+ LIDS_DBG("attaching pid %d ppid %d %s\n", task->pid, task->parent->pid,
+ dentry->d_iname);
+
+ retval = lids_get_inode_security(dentry, dentry->d_inode);
+ if (retval < 0)
+ return retval;
+
+ task_acl = task->security;
+ if (task_acl && task_acl->s_acl) {
+ lids_free_subject_acl(task_acl->s_acl);
+ /* FIXME lock ?? */
+ task_acl->s_acl = NULL;
+ }
+ task_acl = task->parent->security;
+ retval = lids_get_task_acl(task, task_acl, dentry->d_inode->i_security);
+
+ return retval;
+}
+
+int
+lids_setup_task_acl(int state)
+{
+ struct task_struct *p;
+
+ rcu_read_lock();
+ for_each_process(p) {
+ if (lids_push_task_acl(p) < 0)
+ return -1;
+ }
+ rcu_read_unlock();
+ /* attach now */
+ spin_lock(&lids_init_lock);
+ next_task:
+ if (!list_empty(&lids_init_head)) {
+ struct lids_task_acl *task_acl;
+ task_acl = list_entry(lids_init_head.next,
+ struct lids_task_acl, list);
+ //struct inode *inode = isec->inode;
+ spin_unlock(&lids_init_lock);
+
+ lids_attach_task_acl(task_acl->task);
+
+ spin_lock(&lids_init_lock);
+ list_del_init(&task_acl->list);
+ goto next_task;
+ }
+ spin_unlock(&lids_init_lock);
+
+ return 0;
+}
+
+/* inode acl */
+
+static int
+lids_copy_inode_acl(struct lids_inode_acl *d_i_acl, struct lids_inode_acl *s_i_acl)
+{
+ struct lids_subject_acl *d_s_acl;
+ struct lids_object_acl *d_o_acl,*s_o_acl;
+
+ memcpy(d_i_acl, s_i_acl, sizeof(struct lids_inode_acl));
+
+ LIDS_DBG("%s: inode name = %s, perm sid %d oid %d\n",__FUNCTION__,s_i_acl->name,s_i_acl->perm[0].sid, s_i_acl->perm[0].oid);
+
+ if(s_i_acl->s_acl) {
+ d_s_acl = kmalloc(sizeof(struct lids_subject_acl),GFP_KERNEL);
+ if(!d_s_acl) {
+ printk("%s: LIDS: kmalloc subject acl error\n",__FUNCTION__);
+ return -ENOMEM;
+ }
+ memcpy(d_s_acl, s_i_acl->s_acl,sizeof(struct lids_subject_acl));
+
+ d_i_acl->s_acl = d_s_acl;
+ d_s_acl->o_acl = NULL;
+
+ s_o_acl = s_i_acl->s_acl->o_acl;
+
+ while(s_o_acl) {
+ d_o_acl = kmalloc(sizeof(struct lids_object_acl),GFP_KERNEL);
+ if(!d_o_acl) {
+ printk("%s: LIDS: kmalloc object acl error\n",__FUNCTION__);
+ return -ENOMEM;
+ }
+ memcpy(d_o_acl, s_o_acl,sizeof(struct lids_object_acl));
+ d_o_acl->next = d_s_acl->o_acl;
+ d_s_acl->o_acl = d_o_acl;
+
+ s_o_acl = s_o_acl->next;
+
+ }
+ }
+ return 0;
+}
+
+static struct lids_inode_acl *
+lids_set_inode_acl(struct inode *inode, struct lids_inode_acl *c_i_acl)
+{
+ struct lids_inode_acl *i_acl;
+
+ i_acl = kmalloc(sizeof (struct lids_inode_acl), GFP_KERNEL);
+ if (!i_acl) {
+ printk(KERN_INFO "LIDS: kmalloc failed for inode_acl\n");
+ return NULL;
+ }
+ if(!c_i_acl) {
+ c_i_acl = kmalloc(sizeof(struct lids_inode_acl),GFP_KERNEL);
+ if(!c_i_acl) {
+ printk("LIDS: fatal error c_i_acl kmalloc failed\n");
+ return NULL;
+ }
+ memset(c_i_acl, 0, sizeof(struct lids_inode_acl));
+ c_i_acl->version = lids_update_version;
+ c_i_acl->type = 0xffffffff;
+ c_i_acl->magic = LIDS_MAGIC;
+ }
+ lids_copy_inode_acl(i_acl, c_i_acl);
+ /* FIXME, if inode has security */
+
+ spin_lock(&inode->i_lock);
+ lids_free_inode_acl(inode->i_security);
+ inode->i_security = i_acl;
+ spin_unlock(&inode->i_lock);
+
+ return c_i_acl;
+}
+
+static int
+lids_get_inode_security(struct dentry *dentry, struct inode *inode)
+{
+ struct lids_inode_acl *i_acl, *c_i_acl;
+ struct dentry *i_dentry = NULL;
+
+ if (inode == NULL)
+ return 0;
+
+ if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
+ || S_ISLNK(inode->i_mode))) {
+ return 0;
+ }
+
+ LIDS_DBG("%s: ##### inode: mode %d [%d:%d %ld]\n", __FUNCTION__,
+ inode->i_mode,
+ MAJOR(inode->i_sb->s_dev),
+ MINOR(inode->i_sb->s_dev), inode->i_ino);
+
+ i_acl = inode->i_security;
+ if(i_acl && i_acl->version == lids_update_version) {
+ return 0;
+ }
+
+ if (!dentry) {
+ printk("%s: dentry is NULL, Bug?\n",__FUNCTION__);
+ return 0;
+ }
+ i_dentry = dentry;
+ while(1) {
+ c_i_acl = lids_do_get_acl(i_dentry->d_inode);
+ if(c_i_acl != NULL || i_dentry == i_dentry->d_parent ) {
+ c_i_acl = lids_set_inode_acl(i_dentry->d_inode, c_i_acl);
+ break;
+ }
+ i_dentry = i_dentry->d_parent;
+
+ i_acl = i_dentry->d_inode->i_security;
+ if(i_acl && i_acl->version == lids_update_version) {
+ c_i_acl = i_acl;
+ break;
+ }
+ }
+ if(!c_i_acl) {
+ return -ENOMEM;
+ }
+ while(dentry != i_dentry) {
+ c_i_acl = lids_set_inode_acl(dentry->d_inode, c_i_acl);
+ if(!c_i_acl)
+ return -ENOMEM;
+ dentry = dentry->d_parent;
+ /* it is root now */
+ }
+ return 0;
+}
+
+#if 0
+static int
+lids_check_shellcode(struct linux_binprm *bprm)
+{
+ struct page *page;
+ int i, offset, err = 0;
+ char *kaddr, *paddr, *p;
+ struct dentry *dentry;
+/*
+ * copy the userspace charctor into a buffer to hold all the
+ * envp here.. and check it.
+ */
+ offset = (bprm->p) % PAGE_SIZE;
+ i = (bprm->p) / PAGE_SIZE;
+ kaddr = p = kmalloc(MAX_ARG_PAGES * PAGE_SIZE - bprm->p, GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+
+ while (i < MAX_ARG_PAGES) {
+ page = bprm->page[i];
+ paddr = kmap(page);
+
+ memcpy(kaddr, paddr + offset, PAGE_SIZE - offset);
+ kaddr += PAGE_SIZE - offset;
+ kunmap(page);
+ offset = 0;
+ i++;
+ }
+ kaddr = p;
+ i = 0;
+ while (i < bprm->envc + bprm->argc) {
+ if (strlen(kaddr) > LIDS_SHELLCODE_LENGTH) {
+ lids_security_alert
+ ("Found overlong %s when exec %s: length = %d",
+ i < bprm->argc ? "parameters" : "env",
+ bprm->filename, strlen(kaddr));
+#ifdef LIDS_SHELLCODE_STRING
+ if (strstr(kaddr, LIDS_SHELLCODE_STRING)) {
+ err = -1;
+ dentry = bprm->file->f_dentry;
+ lids_security_alert
+ ("Shellcode detected when exec %s, program terminated!",
+ bprm->filename);
+ break;
+ }
+#endif
+ }
+ kaddr = strchr(kaddr, '\0');
+ kaddr = kaddr + 1;
+ i++;
+ }
+ kfree(p);
+ return err;
+}
+#endif
+
+static int
+lids_check_envp(struct linux_binprm *bprm)
+{
+ struct page *page;
+ int err = 0;
+ char *kaddr, *paddr, *p, *end_p;
+ struct dentry *dentry;
+ unsigned long offset;
+ unsigned long i;
+/*
+ * copy the userspace charctor into a buffer to hold all the
+ * envp here.. and check it.
+ */
+ LIDS_DBG("%s: enter file %s\n",__FUNCTION__, bprm->filename);
+ offset = (bprm->p) % PAGE_SIZE;
+ i = (bprm->p) / PAGE_SIZE;
+ kaddr = p = kmalloc(MAX_ARG_PAGES * PAGE_SIZE - bprm->p, GFP_KERNEL);
+
+ if (!p)
+ return -1;
+
+ end_p = p + MAX_ARG_PAGES * PAGE_SIZE - bprm->p;
+ while (i < MAX_ARG_PAGES) {
+ page = bprm->page[i];
+ paddr = kmap(page);
+ /* make sure each time, the kaddr is not out of bound */
+ if( kaddr + PAGE_SIZE - offset > end_p ) {
+ kfree(p);
+ return -1;
+ }
+ memcpy(kaddr, paddr + offset, PAGE_SIZE - offset);
+ kaddr += PAGE_SIZE - offset;
+ kunmap(page);
+ offset = 0;
+ i++;
+ }
+ kaddr = p;
+ i = 0;
+ while (i < bprm->envc + bprm->argc) {
+ if (i >= bprm->argc) {
+ LIDS_DBG("%s:str[%d] = [%s]\n", __FUNCTION__, i, kaddr);
+ if ((kaddr[0] == 'L' || kaddr[0] == 'l') &&
+ (kaddr[1] == 'D' || kaddr[1] == 'd') &&
+ (kaddr[2] == '_')) {
+ err = -1;
+ break;
+ }
+ }
+ kaddr = strchr(kaddr, '\0');
+ kaddr = kaddr + 1;
+ /* overflow checking */
+ if(kaddr > end_p) {
+ kfree(p);
+ return -1;
+ }
+ i++;
+ }
+
+ if (err) {
+ dentry = bprm->file->f_dentry;
+ lids_security_alert
+ ("Attempt to give [%.128s] to privilegied program %.128s (dev %d:%d inode %ld)",
+ kaddr, bprm->filename, MAJOR(dentry->d_inode->i_sb->s_dev),
+ MINOR(dentry->d_inode->i_sb->s_dev),
+ dentry->d_inode->i_ino);
+ }
+ kfree(p);
+ return err;
+}
+/*
+ * checking the envp
+ */
+int
+lids_execve_check_envp(struct linux_binprm *bprm)
+{
+ struct lids_task_acl *current_task_acl = current->security;
+ struct lids_subject_acl *current_s_acl=NULL;
+
+ LIDS_DBG("%s: enter file %s\n",__FUNCTION__, bprm->filename);
+ if (current_task_acl && current_task_acl->s_acl) {
+ current_s_acl = current_task_acl->s_acl;
+
+ if ((current_s_acl->o_acl || current_s_acl->sys_cap)
+ && (lids_load && lids_local_load)) {
+ if (lids_check_capable(current, CAP_SYS_PTRACE, 0)) {
+ if (lids_check_envp(bprm) < 0) {
+ task_lock(current);
+ current->security = NULL;
+ task_unlock(current);
+ lids_free_task_acl(current_task_acl);
+ }
+ }
+ }
+ }
+ return 0;
+}
+
+/*
+ * the current->security struct lids_sys_acl
+ */
+int
+lids_execve(struct linux_binprm *bprm)
+{
+ struct lids_task_acl *current_task_acl = current->security;
+ struct dentry *dentry,*t_dentry;
+ struct lids_inode_acl *i_acl = NULL;
+ int error;
+
+ if (current->parent->pid == 0)
+ return 0;
+
+ if (!bprm || !bprm->file) {
+ printk("LIDS: %s:BUG!\n", __FUNCTION__);
+ return 0;
+ }
+
+ LIDS_DBG("@@@@@@ %s:##### pid %i ppid %i exec [%s]\n", __FUNCTION__,
+ current->pid, current->parent->pid, bprm->filename);
+ dentry = bprm->file->f_dentry;
+ /* check if this dentry is the same as this pid or not */
+ /* LIDS_EXEC checking here */
+
+ t_dentry = lids_get_task_dentry(current);
+
+ if (t_dentry && lids_load && lids_local_load
+ && lids_ext_capable(current, 15) < 0) {
+ if (dentry->d_inode->i_ino != t_dentry->d_inode->i_ino ||
+ dentry->d_inode->i_sb->s_dev !=
+ t_dentry->d_inode->i_sb->s_dev
+ ) {
+ lids_security_alert
+ ("pid %i ppid %i, exec [%s] denied\n",
+ current->pid, current->parent->pid,
+ bprm->filename);
+ return -EPERM;
+ }
+ }
+
+ if (dentry && dentry->d_inode) {
+ error = lids_get_inode_security(dentry, dentry->d_inode);
+ if (error < 0)
+ return error;
+ i_acl = dentry->d_inode->i_security;
+ }
+
+ error = lids_get_task_acl(current, current_task_acl, i_acl);
+ if (error)
+ return error;
+
+ return 0;
+}
+
+/* copy the fork
+ */
+
+int
+lids_fork_task(struct task_struct *tsk)
+{
+ struct lids_subject_acl *src = NULL;
+ struct lids_subject_acl *dst = NULL;
+ struct lids_task_acl *task_acl, *current_task_acl;
+
+ if (!tsk) {
+ printk(KERN_INFO "LIDS: %s: BUG\n", __FUNCTION__);
+ return 0;
+ }
+
+ if (!tsk->parent->pid)
+ return 0;
+
+ current_task_acl = current->security;
+
+ if (!current_task_acl) {
+ LIDS_DBG(KERN_WARNING "%s: current task is NULL\n",
+ __FUNCTION__);
+ return 0;
+ }
+
+ src = current_task_acl->s_acl;
+
+ if (!src) {
+ return 0;
+ }
+
+ if ((dst = lids_copy_subject_acl(src)) == NULL) {
+ LIDS_DBG("lids_copy_subject_acl error\n");
+ return -1;
+ }
+
+ task_acl = lids_alloc_task_acl(tsk);
+ if (!task_acl) {
+ LIDS_DBG(KERN_WARNING "LIDS: kmalloc failed for task_acl\n");
+ return -ENOMEM;
+ }
+ task_acl->s_acl = dst;
+ return 0;
+}
+
+int
+lids_check_task_kill(struct task_struct *p, struct siginfo *info, int sig)
+{
+ struct lids_task_acl *task_acl = p->security;
+ struct lids_subject_acl *s_acl = task_acl->s_acl;
+
+ if (s_acl && cap_raised(s_acl->ext_cap, LIDS_CAP_PROTECTED)) {
+ if (current->pid && (current->pid != p->pid)
+ && ((sig != SIGCHLD) || (current->parent->pid != p->pid))) {
+ if (!(lids_ext_capable(current, LIDS_CAP_KILL_PROTECTED))) {
+ lids_security_alert
+ ("Attempt to kill pid=%d with sig=%d",
+ p->pid, sig);
+ lids_ext_cap_log(LIDS_CAP_PROTECTED);
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ }
+ return 0;
+}
diff -Nru linux-2.6.21.1.org/security/lids/lids_cap.c linux-2.6.21.1/security/lids/lids_cap.c
--- linux-2.6.21.1.org/security/lids/lids_cap.c 1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.21.1/security/lids/lids_cap.c 2007-05-22 11:36:54.000000000 +0900
@@ -0,0 +1,215 @@
+/*
+ * LIDS Capability functions
+ *
+ * Copyright (C) 2002 Huagang Xie <xie@lids.org>
+ * Copyright (C) 2002 Philippe Biondi <biondi@cartel-securite.fr>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#include <linux/autoconf.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/security.h>
+#include <linux/capability.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/slab.h>
+#include <linux/smp_lock.h>
+#include <linux/spinlock.h>
+#include <linux/file.h>
+#include <linux/ext2_fs.h>
+#include <net/ip.h> /* for sysctl_local_port_range[] */
+#include <asm/uaccess.h>
+#include <asm/semaphore.h>
+#include <asm/ioctls.h>
+#include <linux/lids.h>
+#include <linux/lidsext.h>
+#include <linux/lidsif.h>
+/*
+ * lids capability violate logging
+ */
+
+kernel_cap_t lids_cap_val = 0;
+
+static char *lids_caps_desc[] = {
+ "CAP_CHOWN",
+ "CAP_DAC_OVERRIDE",
+ "CAP_DAC_READ_SEARCH",
+ "CAP_FOWNER",
+ "CAP_FSETID",
+ "CAP_KILL",
+ "CAP_SETGID",
+ "CAP_SETUID",
+ "CAP_SETPCAP",
+ "CAP_LINUX_IMMUTABLE",
+ "CAP_NET_BIND_SERVICE",
+ "CAP_NET_BROADCAST",
+ "CAP_NET_ADMIN",
+ "CAP_NET_RAW",
+ "CAP_IPC_LOCK",
+ "CAP_IPC_OWNER",
+ "CAP_SYS_MODULE",
+ "CAP_SYS_RAWIO",
+ "CAP_SYS_CHROOT",
+ "CAP_SYS_PTRACE",
+ "CAP_SYS_PACCT",
+ "CAP_SYS_ADMIN",
+ "CAP_SYS_BOOT",
+ "CAP_SYS_NICE",
+ "CAP_SYS_RESOURCE",
+ "CAP_SYS_TIME",
+ "CAP_SYS_TTY_CONFIG",
+ "CAP_MKNOD",
+ "CAP_LEASE",
+ "CAP_AUDIT_WRITE",
+ "CAP_AUDIT_CONTROL",
+ "CAP_PROTECTED",
+ NULL
+};
+
+static char *lids_ext_caps_desc[] = {
+ "LIDS_SOCKET_CREATE",
+ "LIDS_SOCKET_CONNECT",
+ "LIDS_SOCKET_BIND",
+ "LIDS_SOCKET_LISTEN",
+ "LIDS_SOCKET_ACCEPT",
+ "LIDS_SOCKET_SENDMSG",
+ "LIDS_SOCKET_RECVMSG",
+ "LIDS_SOCKET_GETSOCKNAME",
+ "LIDS_SOCKET_GETPEERNAME",
+ "LIDS_SOCKET_GETSOCKOPT",
+ "LIDS_SOCKET_SETSOCKOPT",
+ "LIDS_SOCKET_SHUTDOWN",
+ "LIDS_SOCKET_CREATE_TCP",
+ "LIDS_SOCKET_CREATE_UDP",
+ "LIDS_SOCKET_NF_MARK",
+ "LIDS_EXEC",
+ "LIDS_CAP_PROTECTED",
+ "LIDS_CAP_KILL_PROTECTED",
+ NULL
+};
+
+/*
+ * check the CAP_NET_BIND_SERVICE to bind to specify port
+ */
+int
+lids_bind_checker(const int port)
+{
+ int i = 0;
+ struct lids_task_acl *task_acl = current->security;
+ struct lids_subject_acl *s_acl;
+
+ /* if CAP_NET_BIND_SERVICE is enable global, return success */
+// if (capable(CAP_NET_BIND_SERVICE))
+ if (cap_raised(cap_bset, CAP_NET_BIND_SERVICE))
+ return 1;
+ /* if the LIDS is disable , return success */
+ /* check only port < 1024) */
+ if (!(lids_load && lids_local_load) || port > 1023 )
+ return 1;
+ if (!( task_acl && task_acl->s_acl))
+ return 1;
+ s_acl = task_acl->s_acl;
+
+ for (i = 0; i < LIDS_PORT_ITEM && s_acl->port[i][0] != -1; i++) {
+ if (port <= s_acl->port[i][1]
+ && port >= s_acl->port[i][0])
+ return 1;
+ }
+ return -1;
+}
+static void
+lids_capset_log(kernel_cap_t dest)
+{
+ int i=0,len=0;
+ char action[640];
+ //kernel_cap_t dest;
+ //cap_t(dest) = cap_t(a) & ~cap_t(set);
+
+ memset(action,'\0',640);
+
+ for(i=0;i<32;i++) {
+ if(cap_raised(dest,i) && (len+strlen(lids_caps_desc[i])+1) < 640) {
+ memcpy(action+len,lids_caps_desc[i],strlen(lids_caps_desc[i]));
+ len = len+strlen(lids_caps_desc[i])+1;
+ action[len-1] = 0x20;
+ //printk("%d: %s action=%s\n", i, lids_caps_desc[i], action);
+ }
+ }
+ lids_alert(LIDS_CAP, -1, i, "cap" , action);
+}
+
+int
+lids_check_capset(struct task_struct *tsk, kernel_cap_t a,kernel_cap_t set)
+{
+ struct lids_task_acl *tsk_acl = tsk->security;
+ kernel_cap_t dest;
+ cap_t(dest) = cap_t(a) & ~cap_t(set);
+
+ //printk("lids_check_capset: dest %x **\n",cap_t(dest));
+ if (tsk_acl && tsk_acl->s_acl) {
+ if (!(cap_t(dest)& ~(tsk_acl->s_acl->sys_cap))) {
+ //printk("lids_check_capset: dest %x, tsk %x\n",cap_t(dest), tsk_acl->s_acl->sys_cap);
+
+ return 0;
+ }
+ }
+ lids_capset_log(to_cap_t(cap_t(dest)& ~(tsk_acl->s_acl->sys_cap)));
+ return LIDS_ERROR(-EPERM);
+
+}
+
+int
+lids_check_capable(struct task_struct *tsk, int cap, int log)
+{
+ struct lids_task_acl *tsk_acl = tsk->security;
+
+ if (cap_raised(cap_bset, cap)) {
+ return 0;
+ } else if (tsk_acl && tsk_acl->s_acl) {
+ if ((cap_raised(tsk_acl->s_acl->sys_cap, cap)))
+ return 0;
+ }
+ if (log)
+ lids_cap_log(cap);
+ return LIDS_ERROR(-EPERM);
+}
+
+void
+lids_cap_log(int cap)
+{
+ if (!cap_raised(lids_cap_val, cap)) {
+ lids_alert(LIDS_CAP, -1, cap, lids_caps_desc[cap],
+ lids_caps_desc[cap]);
+ }
+}
+
+void
+lids_ext_cap_log(int cap)
+{
+ lids_alert(LIDS_SOCKET, -1, cap, lids_ext_caps_desc[cap],
+ lids_ext_caps_desc[cap]);
+}
+
+int
+lids_ext_capable(struct task_struct *tsk, int type)
+{
+ struct lids_task_acl *task_acl = tsk->security;
+ struct lids_subject_acl *s_acl;
+
+ if (!task_acl) {
+ return 0;
+ }
+ s_acl = task_acl->s_acl;
+ if (s_acl && test_bit(type, (void *)&(s_acl->ext_cap))) {
+ return -EPERM;
+ }
+ return 0;
+}
+
diff -Nru linux-2.6.21.1.org/security/lids/lids_init.c linux-2.6.21.1/security/lids/lids_init.c
--- linux-2.6.21.1.org/security/lids/lids_init.c 1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.21.1/security/lids/lids_init.c 2007-05-22 11:36:54.000000000 +0900
@@ -0,0 +1,597 @@
+/*
+ * LIDS INIT functions
+ *
+ * Copyright (C) 2002-2003 Huagang Xie <xie@lids.org>
+ * Copyright (C) 2002 Philippe Biondi <biondi@cartel-securite.fr>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#include <linux/autoconf.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/security.h>
+#include <linux/capability.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/slab.h>
+#include <linux/smp_lock.h>
+#include <linux/spinlock.h>
+#include <linux/file.h>
+#include <linux/namei.h>
+#include <linux/ext2_fs.h>
+#include <asm/uaccess.h>
+#include <asm/semaphore.h>
+#include <asm/ioctls.h>
+#include <linux/lids.h>
+#include <linux/lidsext.h>
+#include <linux/lidsif.h>
+
+static int lids_lock_init = 0;
+static spinlock_t lids_lock;
+int lids_init_setup;
+static int lids_u_size = 0;
+
+static char lids_binary_acl_file[3][PATH_MAX] =
+ { LIDS_BOOT_ACL_FILE, LIDS_POSTBOOT_ACL_FILE, LIDS_SHUTDOWN_ACL_FILE };
+
+char lids_state_name[3][9] = { "BOOT\0", "POSTBOOT\0", "SHUTDOWN\0" };
+
+#define LIDS_MAX_ACL_NUM 1024
+#ifdef CONFIG_LIDS_SHRINK_SIZE
+#include <linux/vmalloc.h>
+static char lids_binary_acl_sizeinfo_file[3][PATH_MAX] =
+ { LIDS_BOOT_ACL_SIZEINFO_FILE, LIDS_POSTBOOT_ACL_SIZEINFO_FILE, LIDS_SHUTDOWN_ACL_SIZEINFO_FILE };
+static struct lids_inode_acl *lids_acl[2] = {NULL, NULL};
+#else
+static struct lids_inode_acl lids_acl[2][LIDS_MAX_ACL_NUM];
+#endif
+static int lids_last_acl[2];
+static int lids_eft_set;
+int lids_update_version;
+
+#ifdef CONFIG_LIDS_SHRINK_SIZE
+/* We think these valuable is not used. */
+#else
+/* fast guessing table*/
+static unsigned long lids_bittab[32] = {
+ 0x00000001, 0x00000002, 0x00000004, 0x00000008,
+ 0x00000010, 0x00000020, 0x00000040, 0x00000080,
+ 0x00000100, 0x00000200, 0x00000400, 0x00000800,
+ 0x00001000, 0x00002000, 0x00004000, 0x00008000,
+ 0x00010000, 0x00020000, 0x00040000, 0x00080000,
+ 0x00100000, 0x00200000, 0x00400000, 0x00800000,
+ 0x01000000, 0x02000000, 0x04000000, 0x08000000,
+ 0x10000000, 0x20000000, 0x40000000, 0x80000000
+};
+static int fastguess[2][2048];
+static unsigned long lids_search_value[2];
+#endif
+
+#if 0
+/*
+ * input : inode
+ * output : the acl found in the lids_user
+ */
+static int lids_search_inode(unsigned long ino, int major, int minor)
+{
+ dev_t s_dev;
+ dev_t dev = MKDEV(major,minor);
+ long j;
+ long i = (ino ^ dev) & 0xffff;
+
+ /* when the 'hash' bit is not set we for sure don't have
+ a matching entry, so just signal 'nothing found' */
+
+ if (!(fastguess[lids_eft_set][i >> 5] & lids_bittab[i & 31]))
+ return -1;
+ /* ok, in case of e.g. 256 entries we would require 256 comparisons
+ for a linear search with no match, the following reduces this
+ to 8 comparisons (table is sorted!) */
+
+ for (j = i = lids_search_value[lids_eft_set];; j >>= 1) {
+ s_dev = MKDEV(lids_acl[lids_eft_set][i].inode.dev.major,
+ lids_acl[lids_eft_set][i].inode.dev.minor);
+
+ if (i >= lids_last_acl[lids_eft_set])
+ i -= j;
+ else if (s_dev < dev)
+ i += j;
+ else if (s_dev > dev)
+ i -= j;
+ else if (lids_acl[lids_eft_set][i].inode.ino < ino)
+ i += j;
+ else if (lids_acl[lids_eft_set][i].inode.ino > ino)
+ i -= j;
+ else {
+ return i; // return type??
+ }
+ if (!j || i < 0)
+ return -1;
+ }
+}
+#endif
+
+struct lids_inode_acl *
+lids_do_get_acl(struct inode *inode)
+{
+#if 0
+ int retval;
+
+ retval = lids_search_inode(inode->i_ino, MAJOR(inode->i_sb->s_dev), MINOR(inode->i_sb->s_dev));
+ if(retval >=0 )
+ return &lids_acl[lids_eft_set][retval];
+ return NULL;
+#else
+ int i;
+
+ for(i=0;i<lids_last_acl[lids_eft_set];i++) {
+ if(inode->i_ino == lids_acl[lids_eft_set][i].inode.ino &&
+ MAJOR(inode->i_sb->s_dev) == lids_acl[lids_eft_set][i].inode.dev.major &&
+ MINOR(inode->i_sb->s_dev) == lids_acl[lids_eft_set][i].inode.dev.minor ) {
+ return &lids_acl[lids_eft_set][i];
+ }
+ }
+ return NULL;
+#endif
+
+}
+
+static int
+lids_buffer_to_inode_acl(char *buffer, int len, struct lids_inode_acl *i_acl)
+{
+ int num;
+ char *p = buffer;
+ struct lids_subject_acl *s_acl;
+ struct lids_object_acl *o_acl, *pre_acl;
+#ifndef CONFIG_LIDS_SHRINK_SIZE
+ u32 eft_set = (lids_eft_set & 1) ^ 1;
+#endif
+ int i;
+
+
+ if (len < sizeof (struct lids_inode_acl) - sizeof(char*) + lids_u_size ) {
+ printk(KERN_INFO "LIDS: Inode ACL incorrect, len = %d\n", len);
+ return -1;
+ }
+ /* we do not have the psinLock_t in the xattr */
+ memcpy(i_acl, p, sizeof (struct lids_inode_acl) - sizeof(char *) -64 );
+ memcpy(i_acl->name, p+sizeof (struct lids_inode_acl)-sizeof(char*)+lids_u_size-64, 64);
+
+ i_acl->version = lids_update_version; /* current version */
+ i_acl->s_acl = NULL;
+
+
+ if (i_acl->magic != LIDS_MAGIC) { /* LIDS magic */
+ printk(KERN_INFO "LIDS: magic code mismatch %x\n",
+ i_acl->magic);
+ return -1;
+ }
+#ifndef CONFIG_LIDS_SHRINK_SIZE
+ /* fastguesing */
+ i = ((MKDEV(i_acl->inode.dev.major,i_acl->inode.dev.minor)) ^ (i_acl->inode.ino)) & 0xffff;
+ fastguess[eft_set][i >> 5] |= lids_bittab[i & 31];
+#endif
+
+ if (len == (sizeof (struct lids_inode_acl) ) - sizeof(char *)+lids_u_size ) {
+ return 0;
+ }
+ len -= (sizeof (struct lids_inode_acl) - sizeof(char *)+lids_u_size );
+
+ s_acl = kmalloc(sizeof (struct lids_subject_acl), GFP_KERNEL);
+ if (!s_acl) {
+ return -ENOMEM;
+ }
+
+ p += (sizeof (struct lids_inode_acl) -sizeof(char *) + lids_u_size );
+ memcpy(s_acl, p, sizeof (struct lids_subject_acl) - sizeof(char *) + lids_u_size);
+
+ /* set it */
+ i_acl->s_acl = s_acl;
+ s_acl->o_acl = NULL;
+
+ if (len == sizeof (struct lids_subject_acl) - sizeof(char *) + lids_u_size) {
+ return 0;
+ }
+ len -= sizeof (struct lids_subject_acl) - sizeof(char *) + lids_u_size;
+
+ if (len < 0) {
+ printk(KERN_INFO "LIDS: Subject ACL incorrect, len = %d\n",
+ len);
+ return -1;
+ }
+ num = (unsigned int) (len % ( sizeof (struct lids_object_acl) - sizeof(char*) + lids_u_size));
+ if (num > 0) {
+ printk(KERN_INFO "LIDS: Object ACLs incorrect, len = %d\n",
+ len);
+ return -1;
+ }
+ num = (unsigned int) (len / (sizeof (struct lids_object_acl) - sizeof(char*) + lids_u_size ));
+
+ p += sizeof (struct lids_subject_acl) - sizeof(char *) + lids_u_size;;
+ o_acl = pre_acl = NULL;
+ for (i = 0; i < num; i++) {
+ o_acl = kmalloc(sizeof (struct lids_object_acl), GFP_KERNEL);
+ if (!o_acl) {
+ return -ENOMEM;
+ }
+ memcpy(o_acl, p, sizeof (struct lids_object_acl) - sizeof(char*) + lids_u_size -64 );
+ o_acl->next = pre_acl;
+ memcpy(o_acl->name, p+sizeof (struct lids_object_acl) - sizeof(char*) + lids_u_size-64, 64);
+
+ p += sizeof (struct lids_object_acl) - sizeof(char*) + lids_u_size;
+ pre_acl = o_acl;
+ }
+ /* the last one */
+ s_acl->o_acl = o_acl;
+ return 0;
+
+}
+/*
+ * translate buffer into acl
+ */
+static int
+lids_buffer_to_acl(char *buffer, int len)
+{
+ int err=0;
+ char *p , *q;
+ u32 num;
+ u32 plen=0;
+ u32 hlen;
+ u32 eft_set = (lids_eft_set & 1) ^ 1;
+
+ hlen = sizeof (struct lids_inode_acl) - sizeof(char*) + lids_u_size;
+ p = q = buffer;
+
+ while(len >= hlen ) {
+ hlen = sizeof (struct lids_inode_acl) - sizeof(char*) - 64;
+ num = *(u32 *)(p+12);
+
+ plen = sizeof (struct lids_inode_acl) - sizeof(char*) + lids_u_size;
+
+ if(num != 0) {
+ hlen = plen + sizeof (struct lids_subject_acl) - sizeof(char*) + lids_u_size;
+ if(hlen > len) {
+ return len;
+ }
+ num = *(u32 *)(p+plen+12);
+ plen = hlen;
+
+ if(num != 0) {
+ plen+=num*( sizeof (struct lids_object_acl) - sizeof(char *) + lids_u_size);
+ if(plen > len) {
+ return len;
+ }
+ }
+ }
+ err = lids_buffer_to_inode_acl(p, plen, &lids_acl[eft_set][lids_last_acl[eft_set]]);
+
+ if(err) return err;
+ lids_last_acl[eft_set]++;
+
+ len -= plen;
+ hlen = sizeof (struct lids_inode_acl) - sizeof(char*) + lids_u_size;
+ p += plen;
+ }
+
+ return len;
+}
+void
+lids_free_lids_set(int eft_set)
+{
+#ifdef CONFIG_LIDS_SHRINK_SIZE
+ if (lids_acl[eft_set] != NULL) {
+ vfree(lids_acl[eft_set]);
+ lids_acl[eft_set] = NULL;
+ }
+#else
+ int i;
+
+ for(i=0;i<lids_last_acl[eft_set];i++) {
+ lids_free_subject_acl((lids_acl[eft_set][i].s_acl));
+ }
+ memset(lids_acl[eft_set],0,sizeof(lids_acl[eft_set]));
+#endif
+}
+/*
+ * lids read capability from /etc/lids/lids.cap
+ */
+
+static int
+lids_read_acl(int state)
+{
+ struct file *filp = NULL;
+ char *buffer;
+ mm_segment_t oldfs;
+ int bytes,rlen = 1024;
+ int error = 0;
+ u32 start = 0, finished = 0;
+ struct lids_acl_header hdr;
+ u32 eft_set = (lids_eft_set & 1) ^ 1;
+#ifdef CONFIG_LIDS_SHRINK_SIZE
+ int lids_acl_num = 0, j = 0;
+ int lids_acl_sizeinfo[LIDS_MAX_ACL_NUM];
+#endif
+
+ lids_update_version++;
+ lids_last_acl[eft_set] = 0;
+
+ /* using MUTEX to protect lids_acl[] */
+ /* FIXME, need to free the subject+acl if any*/
+
+ lids_free_lids_set(eft_set);
+
+#ifdef CONFIG_LIDS_SHRINK_SIZE
+ /* If the size information file is not exist, *
+ * we have to allocate the memory for lids_acl with the default size. *
+ * So, the default value is set here. */
+ lids_acl_num = LIDS_MAX_ACL_NUM;
+ memset(lids_acl_sizeinfo, 0, sizeof(lids_acl_sizeinfo));
+
+ filp = filp_open(lids_binary_acl_sizeinfo_file[state-1], O_RDONLY, 0);
+
+ if (!IS_ERR(filp) && (filp != NULL)) {
+ if (filp->f_op->read != NULL) {
+ filp->f_pos = 0;
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ bytes = filp->f_op->read(filp, (char *)&lids_acl_num, sizeof(int), &filp->f_pos);
+ set_fs(oldfs);
+ if (bytes == sizeof(int) && lids_acl_num) {
+ int i;
+ for (i = 0; i < lids_acl_num ; i++) {
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ bytes = filp->f_op->read(filp, (char *)&lids_acl_sizeinfo[i], sizeof(int), &filp->f_pos);
+ set_fs(oldfs);
+ if (bytes != sizeof(int))
+ break;
+ }
+ if (i == lids_acl_num)
+ rlen = lids_acl_sizeinfo[j++];
+ }
+ }
+ /* Close the file */
+ fput(filp);
+ }
+ /* Now, we can get all of the length information of ACLs. *
+ * So, let us allocate the memory for ACLs. */
+ lids_acl[eft_set] = vmalloc(sizeof(struct lids_inode_acl) * lids_acl_num);
+ if (lids_acl[eft_set] == NULL) {
+ /* This is a critical error. *
+ * Since the value of "error" is meaningless now, we just return -1. */
+ error = -1;
+ printk("LIDS: Error allocating the memory for ACLs in state %d.\n", state);
+ return error;
+ }
+#endif
+
+ filp = filp_open(lids_binary_acl_file[state-1], O_RDONLY, 0);
+
+ if (IS_ERR(filp) || (filp == NULL)) {
+ error = -1;
+ printk
+ ("LIDS: Error opening ACLs file %s in state %d, Does it exist?\n",
+ lids_binary_acl_file[state-1], state);
+ /* FIXME: if (lids_load) goto err_panic; */
+ return error;
+ }
+
+ if (filp->f_op->read == NULL) {
+ fput(filp);
+ error = -3;
+ printk("LIDS: The capability file can not be read [state %d]\n",
+ state);
+ /*
+ if (lids_load) goto err_panic ;
+ */
+ return error;
+ }
+ /* read the LIDS cap and version */
+ filp->f_pos = 0;
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ bytes = filp->f_op->read(filp, (char *)&hdr, sizeof(hdr), &filp->f_pos);
+ set_fs(oldfs);
+
+ if (bytes != sizeof(hdr)) {
+ printk("LIDS: %s format error\n", lids_binary_acl_file[state]);
+ fput(filp);
+ return -4;
+ }
+ lids_cap_val = hdr.sys_cap;
+#ifndef CONFIG_LIDS_SHRINK_SIZE
+ lids_search_value[eft_set] = hdr.search;
+#endif
+ lids_u_size = hdr.u_size;
+ printk("LIDS: user space is %d bit\n",lids_u_size*8);
+
+ if (lids_state == LIDS_STATE_BOOT) {
+ lids_acl_discovery = hdr.discovery;
+ memcpy(&lidsadm, &(hdr.lidsadm), sizeof(struct lids_s_inode));
+ printk("LIDS: lidsadm inode 0x%x dev 0x%x:%x\n", lidsadm.ino, lidsadm.dev.major, lidsadm.dev.minor);
+ }
+
+ start = sizeof(hdr) ;
+
+#ifdef CONFIG_LIDS_SHRINK_SIZE
+ while (!finished && j < lids_acl_num) {
+#else
+ while (!finished) {
+#endif
+
+ buffer = kmalloc(rlen,GFP_KERNEL);
+ memset(buffer,0,rlen);
+
+ filp->f_pos = start;
+ oldfs = get_fs();
+ set_fs(KERNEL_DS);
+ bytes = filp->f_op->read(filp, buffer, rlen, &filp->f_pos);
+ set_fs(oldfs);
+
+ if (bytes < rlen) {
+ finished = 1;
+ }
+ error = lids_buffer_to_acl(buffer,bytes);
+
+ kfree(buffer);
+
+ if (error<0)
+ break;
+ /* we do not have enough room for the whole buffer */
+ if(bytes == error) {
+ if(!bytes && finished && start == sizeof(hdr))
+ break;
+ if(finished) {
+ printk("LIDS: Format error\n");
+ error = -10;
+ break;
+ }else {
+#ifdef CONFIG_LIDS_SHRINK_SIZE
+ if (lids_acl_sizeinfo[j] != 0) {
+ /* This should not be happened. */
+ error = -1;
+ printk("LIDS: Error size invalid in %s for state %d.\n", lids_binary_acl_sizeinfo_file[state-1], state);
+ break;
+ }
+ else {
+ rlen +=rlen; /* enlarge the buffer*/
+ }
+#else
+ rlen +=rlen; /* enlarge the buffer*/
+#endif
+ }
+ }else{
+#ifdef CONFIG_LIDS_SHRINK_SIZE
+ if (lids_acl_sizeinfo[j] != 0)
+ rlen = lids_acl_sizeinfo[j++];
+ else
+ rlen = 1024;
+#else
+ rlen = 1024;
+#endif
+ }
+
+ start += bytes-error;
+ }
+ /* Close the file */
+ fput(filp);
+
+ /* switch it */
+ lids_eft_set = eft_set;
+ //printk("LIDS: Using eft_set %d , ",lids_eft_set);
+ printk("LIDS: ACL Discovery: %s, ",lids_acl_discovery?"ON":"OFF");
+ printk("Effective Capability: %x, ",lids_cap_val);
+ printk("Total ACLs Count: %d\n",lids_last_acl[eft_set]);
+
+ return error;
+}
+
+/***********************************************************************
+ *
+ * lids_init
+ *
+ * initialize the vfs security system. read the config file .
+ * add the inode to the files.
+ *
+ */
+
+int
+lids_init(void)
+{
+ int error = 0;
+ /* Get lidsadm dev/inode */
+
+ LIDS_DBG("into lids_init_..\n");
+
+ lids_local_on = 0;
+ lids_local_pid = current->pid;
+
+ if (!lids_lock_init) {
+ spin_lock_init(&lids_lock);
+ lids_lock_init = 1;
+ }
+
+ /* read global acl */
+ /* Read the password now */
+ if (lids_read_pw()) {
+ printk("LIDS: Read password file error\n");
+ error = -8;
+ goto lids_panic;
+ }
+ /* read capability first based on state */
+ printk(KERN_INFO "LIDS: Initializing LIDS ACLs\n");
+
+ if (lids_read_acl(lids_state)) {
+ printk("LIDS: Read ACL file error, state %d\n",
+ lids_state);
+ error = -9;
+ goto lids_panic;
+ }
+
+ if (lids_state == LIDS_STATE_BOOT) {
+ cap_bset = lids_cap_val;
+ printk(KERN_INFO
+ "LIDS: GLOBAL and %s state configuration files loaded\n",
+ lids_state_name[lids_state - 1]);
+ printk(KERN_INFO "LIDS: Entering %s state\n",
+ lids_state_name[lids_state - 1]);
+ }
+ lids_local_on = 1;
+ if (!error) return 0;
+lids_panic:
+ printk
+ ("LIDS_ERR: Cannot initialize the lids system, return code %d\n",
+ error);
+ return error;
+}
+
+/*
+ do_lids_setup
+ */
+int
+do_lids_setup(void)
+{
+ int err = 0;
+
+ /* init the ids file system */
+ struct file *filp;
+
+ filp = filp_open(LIDS_PW_FILE, O_RDONLY, 0);
+
+ if (IS_ERR(filp) || (filp == NULL)) {
+ return -1;
+ }
+
+ lids_init_setup = 1;
+ lids_local_on = 1;
+ lids_flags = 0;
+ lids_state = LIDS_STATE_BOOT;
+ lids_flag_raise(lids_flags, LIDS_FLAGS_LIDS_LOCAL_ON);
+ lids_flag_raise(lids_flags, LIDS_FLAGS_INIT);
+
+ if (lids_load)
+ lids_flag_raise(lids_flags, LIDS_FLAGS_LIDS_ON);
+
+ lids_update_version = (int)get_seconds();
+ lids_eft_set = 0;
+ memset(lids_last_acl,0,sizeof(lids_last_acl));
+ memset(lids_acl,0,sizeof(lids_acl));
+
+
+ lids_sysctl_init();
+ /* load BOOT acl */
+ /* make it read the configure file easier. */
+ err = lids_init();
+
+ printk(KERN_NOTICE "LIDS: Linux Intrusion Detection System %s %s\n", LIDS_VERSION,
+ lids_load == 1 ? "started" : "not started");
+
+
+ return err;
+}
diff -Nru linux-2.6.21.1.org/security/lids/lids_logs.c linux-2.6.21.1/security/lids/lids_logs.c
--- linux-2.6.21.1.org/security/lids/lids_logs.c 1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.21.1/security/lids/lids_logs.c 2007-05-22 11:36:54.000000000 +0900
@@ -0,0 +1,172 @@
+/*
+ * LIDS LOG functions
+ *
+ * Copyright (C) 2002-2003 Huagang Xie <xie@lids.org>
+ * Copyright (C) 2002 Philippe Biondi <biondi@cartel-securite.fr>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/version.h>
+#include <linux/slab.h>
+#include <linux/lids.h>
+
+#ifdef STR
+#undef STR
+#endif
+#define STR2(x) #x
+#define STR(x) STR2(x)
+
+#define lids_print(message, args...) printk(KERN_ALERT message , ## args)
+
+/*
+ * copy from driver/tty/tty_io.c
+ *
+ * This routine returns the name of tty.
+ */
+static char *
+_lids_tty_make_name(struct tty_struct *tty, const char *name, char *buf)
+{
+
+ if (!tty) /* Hmm. NULL pointer. That's fun. */
+ strncpy(buf, "NULL tty",64);
+ else
+ snprintf(buf, 64, name, tty->name);
+
+ return buf;
+}
+
+char *
+lids_tty_name(struct tty_struct *tty, char *buf)
+{
+ return _lids_tty_make_name(tty, (tty) ? tty->name : NULL, buf);
+}
+
+/* return current dentry */
+static struct dentry *
+lids_current_dentry(void)
+{
+ struct dentry *lids_f_dentry = NULL;
+ struct vm_area_struct *vma = NULL;
+
+ if (current->mm) {
+ vma = current->mm->mmap;
+ while (vma) {
+ if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) {
+ lids_f_dentry = vma->vm_file->f_path.dentry;
+ break;
+ }
+ vma = vma->vm_next;
+ }
+ }
+ return lids_f_dentry;
+}
+
+void
+lids_log(int flood, const char *message, ...)
+{
+ va_list args;
+ char ttyname[64];
+ char progname[64];
+ char proginfo[64 + 10 + 10 + 20 + 24]; /* %s+%d+%d+%ld+le texte avec un peu de marge = 128 */
+ char msgstr[256];
+ u32 parent_pid;
+
+ struct dentry *f_current_dentry = NULL;
+
+ /* Get args on the stack */
+ va_start(args, message);
+
+ /* Get dentry of current process, if any */
+ f_current_dentry = lids_current_dentry();
+ /* Get the tty name, if any */
+ memset(ttyname, '\0', 64);
+/* modules do not support the ttyname right now */
+ lids_tty_name(current->signal->tty, ttyname);
+
+ /* Make the proginfo string */
+ if (f_current_dentry && f_current_dentry->d_inode) {
+ strncpy(progname, f_current_dentry->d_iname, 63);
+ snprintf(proginfo, 127, "%s (dev %d:%d inode %ld)",
+ progname,
+ MAJOR(f_current_dentry->d_inode->i_sb->s_dev),
+ MINOR(f_current_dentry->d_inode->i_sb->s_dev),
+ f_current_dentry->d_inode->i_ino);
+ } else {
+ strncpy(proginfo, "(undetermined program)", 63);
+ }
+
+ /* Make the message string */
+ vsnprintf(msgstr, 255, message, args);
+
+ parent_pid = current->parent->pid;
+
+ /* Make the log string */
+
+ lids_print("LIDS: %s pid %d ppid %d uid/gid (%d/%d) on (%s) : %s %s\n",
+ proginfo,
+ current->pid,
+ parent_pid,
+ current->uid,
+ current->gid,
+ ttyname,
+ msgstr,
+ flood ? " - logging disabled for "
+ STR(LIDS_TIMEOUT_AFTER_FLOOD) "s" : "");
+
+ /* deal with args on the stack */
+ va_end(args);
+
+}
+
+/* sent out message */
+void
+lids_alert(int type, long dst, long dst2, char *name, char *action)
+{
+ struct dentry *f_current_dentry = NULL;
+
+ switch (type) {
+ case LIDS_CAP:
+ lids_security_alert("violated %s", action);
+ break;
+ case LIDS_SOCKET:
+ lids_security_alert("attempt to %s", action);
+ break;
+ case LIDS_SOCKET_ENABLE:
+ lids_security_alert("attempt to %s", action);
+ break;
+ case LIDS_READONLY:
+ /* compatible to the acl */
+ type = 1;
+ lids_security_alert("attempt to %s %s for reading", action,
+ name);
+ break;
+ case LIDS_APPEND:
+ type = 3;
+ lids_security_alert("attempt to %s %s for appending", action,
+ name);
+ break;
+ case LIDS_WRITE:
+ type = 7;
+ lids_security_alert("attempt to %s %s for writing", action,
+ name);
+ break;
+ default:
+ lids_security_alert("yeee, alert type mismatch");
+ break;
+ }
+ /* if in acl_discovery mode, print out the acl_discovery mode string */
+ if (lids_acl_discovery) {
+ f_current_dentry = lids_current_dentry();
+ printk(KERN_INFO
+ "LIDS_ACL_DISCOVERY:[state %d]%ld:%d:%s:%d:0:%ld:%ld:%s:0-0\n",
+ lids_state, f_current_dentry->d_inode->i_ino,
+ f_current_dentry->d_inode->i_sb->s_dev, f_current_dentry->d_iname, type,
+ dst, dst2, name);
+ }
+}
diff -Nru linux-2.6.21.1.org/security/lids/lids_lsm.c linux-2.6.21.1/security/lids/lids_lsm.c
--- linux-2.6.21.1.org/security/lids/lids_lsm.c 1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.21.1/security/lids/lids_lsm.c 2007-05-22 11:36:54.000000000 +0900
@@ -0,0 +1,1111 @@
+/*
+ * Linux Intrusion Detectino System for Linux Security Modules project
+ *
+ * Copyright (C) 2002-2004 Huagang Xie (xie@www.lids.org)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Feb 4th, 2002, Huagang, Initial the project
+ *
+ */
+
+#include <linux/autoconf.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/security.h>
+#include <linux/skbuff.h>
+#include <linux/netlink.h>
+#include <linux/ip.h>
+#include <linux/lids.h>
+#include <linux/lidsext.h>
+#include <linux/lidsif.h>
+#include <net/sock.h>
+#include <linux/in.h>
+#include <linux/time.h>
+#include <linux/mount.h>
+#include <linux/namei.h>
+
+struct security_operations *lids_secondary_ops;
+
+static int
+lids_ptrace(struct task_struct *parent, struct task_struct *child)
+{
+ if (lids_load && lids_local_load) {
+ if (lids_check_capable(parent, CAP_SYS_PTRACE, 1)) {
+ lids_security_alert("Attempt to trace pid %i\n",
+ child->pid);
+ return -EPERM;
+ }
+ }
+ return 0;
+}
+
+/* from security/commoncap.c */
+int lids_capget (struct task_struct *target, kernel_cap_t *effective,
+ kernel_cap_t *inheritable, kernel_cap_t *permitted)
+{
+ /* Derived from kernel/capability.c:sys_capget. */
+ *effective = cap_t (target->cap_effective);
+ *inheritable = cap_t (target->cap_inheritable);
+ *permitted = cap_t (target->cap_permitted);
+ return 0;
+}
+
+/* from security/commoncap.c */
+void lids_capset_set (struct task_struct *target, kernel_cap_t *effective,
+ kernel_cap_t *inheritable, kernel_cap_t *permitted)
+{
+ target->cap_effective = *effective;
+ target->cap_inheritable = *inheritable;
+ target->cap_permitted = *permitted;
+}
+
+/* derived from security/commoncap.c */
+int lids_capset_check (struct task_struct *target, kernel_cap_t *effective,
+ kernel_cap_t *inheritable, kernel_cap_t *permitted)
+{
+ if (lids_load && lids_local_load) {
+ if (lids_check_capable(target, CAP_SETPCAP, 1)) {
+ lids_security_alert("Attempt to setpcap pid %i",
+ target->pid);
+ return -EPERM;
+ }
+ }
+ /* Derived from kernel/capability.c:sys_capset. */
+ /* verify restrictions on target's new Inheritable set */
+ if (!cap_issubset (*inheritable,
+ cap_combine (target->cap_inheritable,
+ current->cap_permitted))) {
+ if(lids_check_capset(target, *inheritable,
+ cap_combine (target->cap_inheritable,
+ current->cap_permitted))) {
+ lids_security_alert("capset_check inheritable error, 0x%x, 0x%x",
+ *inheritable, cap_combine(target->cap_inheritable,
+ current->cap_permitted)) ;
+ return -EPERM;
+ }
+ }
+
+ /* verify restrictions on target's new Permitted set */
+ if (!cap_issubset (*permitted,
+ cap_combine (target->cap_permitted,
+ current->cap_permitted))) {
+ if(lids_check_capset(target, *permitted,
+ cap_combine (target->cap_permitted,
+ current->cap_permitted))) {
+ lids_security_alert("capset_check permitted error, 0x%x, 0x%x",
+ *permitted, cap_combine(target->cap_permitted,
+ current->cap_permitted)) ;
+ return -EPERM;
+ }
+ }
+
+ /* verify the _new_Effective_ is a subset of the _new_Permitted_ */
+ if (!cap_issubset (*effective, *permitted)) {
+ if(lids_check_capset(target, *effective,
+ cap_combine (target->cap_effective,
+ current->cap_permitted))) {
+ lids_security_alert("capset_check effective error, 0x%x, 0x%x",
+ *effective, *permitted);
+ return -EPERM;
+ }
+ }
+
+ return 0;
+}
+
+static int
+lids_capable(struct task_struct *tsk, int cap)
+{
+ if (cap_raised (tsk->cap_effective, cap))
+ return 0;
+
+ if (cap_is_fs_cap(cap) ? tsk->fsuid == 0 : tsk->euid == 0) {
+ if (lids_load && lids_local_load) {
+ return lids_check_capable(tsk, cap, 1);
+ }
+ return 0;
+ }
+ //printk("%s: capable error, %d \n",__FUNCTION__, cap);
+ return -EPERM;
+
+}
+
+static inline void lids_emulate_setxuid (int old_ruid, int old_euid,
+ int old_suid)
+{
+ if ((old_ruid == 0 || old_euid == 0 || old_suid == 0) &&
+ (current->uid != 0 && current->euid != 0 && current->suid != 0) &&
+ !current->keep_capabilities) {
+ cap_clear (current->cap_permitted);
+ cap_clear (current->cap_effective);
+ }
+ if (old_euid == 0 && current->euid != 0) {
+ cap_clear (current->cap_effective);
+ }
+ if (old_euid != 0 && current->euid == 0) {
+ current->cap_effective = current->cap_permitted;
+ }
+}
+
+int lids_task_post_setuid (uid_t old_ruid, uid_t old_euid, uid_t old_suid,
+ int flags)
+{
+ switch (flags) {
+ case LSM_SETID_RE:
+ case LSM_SETID_ID:
+ case LSM_SETID_RES:
+ /* Copied from kernel/sys.c:setreuid/setuid/setresuid. */
+ if (!issecure (SECURE_NO_SETUID_FIXUP)) {
+ lids_emulate_setxuid (old_ruid, old_euid, old_suid);
+ }
+ break;
+ case LSM_SETID_FS:
+ {
+ uid_t old_fsuid = old_ruid;
+
+ /* Copied from kernel/sys.c:setfsuid. */
+
+ /*
+ * FIXME - is fsuser used for all CAP_FS_MASK capabilities?
+ * if not, we might be a bit too harsh here.
+ */
+
+ if (!issecure (SECURE_NO_SETUID_FIXUP)) {
+ if (old_fsuid == 0 && current->fsuid != 0) {
+ cap_t (current->cap_effective) &=
+ ~CAP_FS_MASK;
+ }
+ if (old_fsuid != 0 && current->fsuid == 0) {
+ cap_t (current->cap_effective) |=
+ (cap_t (current->cap_permitted) &
+ CAP_FS_MASK);
+ }
+ }
+ break;
+ }
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+
+static int
+lids_bprm_alloc_security(struct linux_binprm *bprm)
+{
+ int rc = 0;
+ if (lids_execve(bprm))
+ return -1;
+
+ if (lids_secondary_ops)
+ rc = lids_secondary_ops->bprm_alloc_security(bprm);
+
+ return rc;
+}
+
+static void
+lids_bprm_free_security(struct linux_binprm *bprm)
+{
+ if (lids_secondary_ops)
+ lids_secondary_ops->bprm_free_security(bprm);
+ return;
+}
+
+static void
+lids_bprm_apply_creds (struct linux_binprm *bprm, int unsafe)
+{
+ kernel_cap_t new_permitted, working;
+
+ new_permitted = cap_intersect (bprm->cap_permitted, cap_bset);
+ working = cap_intersect (bprm->cap_inheritable,
+ current->cap_inheritable);
+ new_permitted = cap_combine (new_permitted, working);
+
+ if (bprm->e_uid != current->uid || bprm->e_gid != current->gid ||
+ !cap_issubset (new_permitted, current->cap_permitted)) {
+ current->mm->dumpable = 0;
+
+ if (unsafe & ~LSM_UNSAFE_PTRACE_CAP) {
+ if (!capable(CAP_SETUID)) {
+ bprm->e_uid = current->uid;
+ bprm->e_gid = current->gid;
+ }
+ if (!capable (CAP_SETPCAP)) {
+ new_permitted = cap_intersect (new_permitted,
+ current->cap_permitted);
+ }
+ }
+/*
+ if ((unsafe & ~LSM_UNSAFE_PTRACE_CAP) && !capable(CAP_SETUID)) {
+ bprm->e_uid = current->uid;
+ bprm->e_gid = current->gid;
+ }
+*/
+ }
+
+ current->suid = current->euid = current->fsuid = bprm->e_uid;
+ current->sgid = current->egid = current->fsgid = bprm->e_gid;
+
+ if (current->pid != 1) {
+ current->cap_permitted = new_permitted;
+ current->cap_effective =
+ cap_intersect (new_permitted, bprm->cap_effective);
+ }
+
+// current->keep_capabilities = 0;
+
+ if (lids_secondary_ops)
+ lids_secondary_ops->bprm_apply_creds(bprm,unsafe);
+ return;
+}
+
+static int
+lids_bprm_set_security(struct linux_binprm *bprm)
+{
+ int rc = 0;
+
+ cap_clear (bprm->cap_inheritable);
+ cap_clear (bprm->cap_permitted);
+ cap_clear (bprm->cap_effective);
+
+ if (!issecure (SECURE_NOROOT)) {
+ if (bprm->e_uid == 0 || current->uid == 0) {
+ cap_set_full (bprm->cap_inheritable);
+ cap_set_full (bprm->cap_permitted);
+ }
+ if (bprm->e_uid == 0)
+ cap_set_full (bprm->cap_effective);
+ }
+ if (lids_secondary_ops)
+ rc = lids_secondary_ops->bprm_set_security(bprm);
+
+ return rc;
+}
+static int
+lids_bprm_check_security(struct linux_binprm *bprm)
+{
+ lids_execve_check_envp(bprm);
+ return 0;
+}
+
+#ifndef MODULE
+static int __init
+lids_load_setup(char *str)
+{
+ lids_load = simple_strtol(str, NULL, 0);
+ return 1;
+}
+#endif
+
+static int lids_sb_mount (char *dev_name, struct nameidata *nd, char *type,
+ unsigned long flags, void *data)
+{
+ struct dentry *dentry = nd->dentry;
+
+ if(IS_ROOT(dentry)) {
+ if(!lids_init_setup) {
+ do_lids_setup();
+ }
+ }
+ return 0;
+}
+
+static int lids_sb_kern_mount (struct super_block *sb, void *data)
+{
+ return 0;
+}
+
+static void lids_sb_post_remount (struct vfsmount *mnt, unsigned long flags,
+ void *data)
+{
+ struct vfsmount *parent;
+
+// spin_lock(&vfsmount_lock);
+ parent=mnt->mnt_parent;
+
+ if (parent == mnt || IS_ROOT(mnt->mnt_mountpoint)) {
+ if(!lids_init_setup) {
+ do_lids_setup();
+ }
+ }
+// spin_unlock(&vfsmount_lock);
+
+ return;
+}
+
+static void
+lids_sb_post_mountroot(void)
+{
+ if(!lids_init_setup) {
+ do_lids_setup();
+ }
+ return;
+}
+
+static void
+lids_inode_free_security(struct inode *inode)
+{
+#if 0
+ struct ipt_mark_target_info *markinfo = inode->i_security;
+
+ if (!markinfo)
+ return;
+ inode->i_security = NULL;
+ kfree(markinfo);
+#endif
+ lids_free_inode_acl(inode->i_security);
+ return;
+}
+
+static int
+lids_inode_link(struct dentry *old_dentry, struct inode *inode,
+ struct dentry *new_dentry)
+{
+ int rc = 0;
+
+ if (lids_secondary_ops)
+ rc = lids_secondary_ops->inode_link(old_dentry, inode,
+ new_dentry);
+
+ return rc;
+}
+
+static int
+lids_inode_unlink(struct inode *inode, struct dentry *dentry)
+{
+ if (lids_load && lids_local_load) {
+ if (lids_check_base(dentry, LIDS_WRITE)) {
+ lids_alert(LIDS_WRITE, inode->i_ino, inode->i_sb->s_dev,
+ dentry->d_iname, "unlink");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_inode_symlink(struct inode *inode, struct dentry *dentry, const char *name)
+{
+ if (lids_load && lids_local_load) {
+ if (lids_check_base(dentry, LIDS_WRITE)) {
+ lids_alert(LIDS_WRITE, inode->i_ino, inode->i_sb->s_dev,
+ dentry->d_iname, "symlink");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_inode_mkdir(struct inode *inode, struct dentry *dentry, int mask)
+{
+ if (lids_load && lids_local_load) {
+ if (lids_check_base(dentry, LIDS_WRITE)) {
+ lids_alert(LIDS_WRITE, inode->i_ino, inode->i_sb->s_dev,
+ dentry->d_iname, "mkdir");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_inode_rmdir(struct inode *inode, struct dentry *dentry)
+{
+ if (lids_load && lids_local_load) {
+ if (lids_check_base(dentry, LIDS_WRITE)) {
+ lids_alert(LIDS_WRITE, inode->i_ino, inode->i_sb->s_dev,
+ dentry->d_iname, "rmdir");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_inode_mknod(struct inode *inode, struct dentry *dentry,
+ int major, dev_t minor)
+{
+ if (lids_load && lids_local_load) {
+ if (lids_check_base(dentry, LIDS_WRITE)) {
+ lids_alert(LIDS_WRITE, inode->i_ino, inode->i_sb->s_dev,
+ dentry->d_iname, "mknod");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_inode_rename(struct inode *old_inode,
+ struct dentry *old_dentry,
+ struct inode *new_inode, struct dentry *new_dentry)
+{
+ if (lids_load && lids_local_load) {
+ if (lids_check_base(old_dentry, LIDS_WRITE)) {
+ lids_alert(LIDS_WRITE, old_inode->i_ino,
+ old_inode->i_sb->s_dev, old_dentry->d_iname,
+ "rename to");
+ return LIDS_ERROR(-EPERM);
+ }
+ if (lids_check_base(new_dentry, LIDS_WRITE)) {
+ lids_alert(LIDS_WRITE, new_inode->i_ino,
+ new_inode->i_sb->s_dev, new_dentry->d_iname,
+ "rename from");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_inode_readlink(struct dentry *dentry)
+{
+ if (lids_load && lids_local_load) {
+ if (lids_check_base(dentry, LIDS_READONLY)) {
+ lids_alert(LIDS_WRITE, dentry->d_inode->i_ino,
+ dentry->d_inode->i_sb->s_dev,
+ dentry->d_iname, "readlink");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_inode_follow_link(struct dentry *dentry, struct nameidata *nameidata)
+{
+ int rc = 0;
+
+ if (lids_secondary_ops)
+ rc = lids_secondary_ops->inode_follow_link(dentry, nameidata);
+
+ if (rc)
+ return rc;
+
+ if (lids_load && lids_local_load) {
+ if (lids_check_base(dentry, LIDS_READONLY)) {
+ lids_alert(LIDS_WRITE, dentry->d_inode->i_ino,
+ dentry->d_inode->i_sb->s_dev,
+ dentry->d_iname, "followlink");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_inode_permission(struct inode *inode, int mask, struct nameidata *nd)
+{
+ struct list_head *head, *next, *tmp;
+ int error = 0;
+ struct dentry *d;
+
+ if (!(lids_load && lids_local_load))
+ return 0;
+
+ /* we will not due with other type */
+
+ spin_lock(&dcache_lock);
+ head = &inode->i_dentry;
+ next = inode->i_dentry.next;
+
+ while (next != head) {
+ tmp = next;
+ next = tmp->next;
+ d = list_entry(tmp, struct dentry, d_alias);
+
+ spin_unlock(&dcache_lock);
+
+ if ((mask & MAY_APPEND)) {
+ error = lids_check_base(d, LIDS_APPEND);
+ if (error) {
+ lids_alert(LIDS_APPEND, inode->i_ino,
+ inode->i_sb->s_dev, d->d_iname,
+ "open");
+ error = LIDS_ERROR(-EPERM);
+ }
+ } else if ((mask & MAY_WRITE)) {
+ error = lids_check_base(d, LIDS_WRITE);
+ if (error) {
+ lids_alert(LIDS_WRITE, inode->i_ino,
+ inode->i_sb->s_dev, d->d_iname,
+ "open");
+ error = LIDS_ERROR(-EPERM);
+ }
+ } else {
+ error = lids_check_base(d, LIDS_READONLY);
+ if (error) {
+ lids_alert(LIDS_READONLY, inode->i_ino,
+ inode->i_sb->s_dev, d->d_iname,
+ "open");
+ error = LIDS_ERROR(-ENOENT);
+ }
+
+ }
+ spin_lock(&dcache_lock);
+ }
+ spin_unlock(&dcache_lock);
+ return error;
+}
+
+static int
+lids_inode_setattr(struct dentry *dentry, struct iattr *iattr)
+{
+ if (lids_load && lids_local_load) {
+ if (lids_check_base(dentry, LIDS_WRITE)) {
+ lids_alert(LIDS_WRITE, dentry->d_inode->i_ino,
+ dentry->d_inode->i_sb->s_dev,
+ dentry->d_iname, "setattr");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_inode_setxattr(struct dentry *dentry, char *name, void *value,
+ size_t size, int flags)
+{
+ if (!strcmp(name, XATTR_NAME_LIDS)) {
+ if (lids_load && lids_local_load) {
+ lids_security_alert(" setxattr denied for %s\n", name);
+ return -EPERM;
+ }
+ }
+ return 0;
+}
+
+static int
+lids_inode_getxattr(struct dentry *dentry, char *name)
+{
+ if (!strcmp(name, XATTR_NAME_LIDS)) {
+ if (lids_load && lids_local_load) {
+ lids_security_alert(" getxattr denied for %s\n", name);
+ return -EPERM;
+ }
+ /* recal the task */
+ }
+ return 0;
+}
+
+static int
+lids_inode_removexattr(struct dentry *dentry, char *name)
+{
+ if (!strcmp(name, XATTR_NAME_LIDS)) {
+ if (lids_load && lids_local_load) {
+ lids_security_alert(" removexattr denied for %s\n",
+ name);
+ return -EPERM;
+ }
+ }
+ return 0;
+}
+
+static void
+lids_d_instantiate(struct dentry *dentry, struct inode *inode)
+{
+ return;
+}
+
+static int
+lids_file_permission(struct file *file, int mask)
+{
+ if (lids_load && lids_local_load) {
+ struct inode *inode = file->f_dentry->d_inode;
+
+ if (inode && S_ISBLK(inode->i_mode) &&
+ lids_check_capable(current, CAP_SYS_RAWIO, 1)) {
+ if (mask & MAY_WRITE)
+ lids_security_alert("CAP_SYS_RAWIO violation: "
+ "Attempt to write to raw device %d:%d",
+ MAJOR(inode->i_sb->s_dev),
+ MINOR(inode->i_sb->s_dev));
+ else
+ lids_security_alert("CAP_SYS_RAWIO violation: "
+ "Attempt to read from raw device %d:%d",
+ MAJOR(inode->i_sb->s_dev),
+ MINOR(inode->i_sb->s_dev));
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_task_alloc_security(struct task_struct *p)
+{
+ if (lids_fork_task(p))
+ return -EPERM;
+ return 0;
+}
+
+static void
+lids_task_free_security(struct task_struct *p)
+{
+ struct lids_task_acl *task_acl;
+
+ task_acl = p->security;
+ task_lock(p);
+ p->security = NULL;
+ task_unlock(p);
+
+ lids_free_task_acl(task_acl);
+ return;
+}
+
+static int
+lids_task_kill(struct task_struct *p, struct siginfo *info, int sig, u32 secid)
+{
+ if (lids_load && lids_local_load && p->security) {
+ if (lids_check_task_kill(p, info, sig))
+ return -EPERM;
+ }
+ return 0;
+}
+
+static void
+lids_task_reparent_to_init(struct task_struct *p)
+{
+ p->euid = p->fsuid = 0;
+ return;
+}
+
+#ifdef CONFIG_SECURITY_NETWORK
+
+static int
+lids_socket_create(int family, int type, int protocol,int kern)
+{
+ if (kern)
+ return 0;
+ if (lids_load && lids_local_load && family == AF_INET) {
+ if (lids_ext_capable(current, LIDS_SOCKET_CREATE) < 0) {
+ lids_alert(LIDS_SOCKET, -1, LIDS_SOCKET_CREATE,
+ "LIDS_SOCKET_CREATE", "create socket");
+ return LIDS_ERROR(-EPERM);
+ }
+ if (type == SOCK_DGRAM) {
+ if (lids_ext_capable(current, LIDS_SOCKET_CREATE_UDP) <
+ 0) {
+ lids_alert(LIDS_SOCKET, -1,
+ LIDS_SOCKET_CREATE_UDP,
+ "LIDS_SOCKET_CREATE_UDP",
+ "create udp socket");
+ return LIDS_ERROR(-EPERM);
+ }
+ } else if (type == SOCK_STREAM) {
+ if (lids_ext_capable(current, LIDS_SOCKET_CREATE_TCP) <
+ 0) {
+ lids_alert(LIDS_SOCKET, -1,
+ LIDS_SOCKET_CREATE_TCP,
+ "LIDS_SOCKET_CREATE_TCP",
+ "create tcp socket");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ }
+ return 0;
+}
+
+static void
+lids_socket_post_create(struct socket *sock, int family, int type, int protocol, int kern)
+{
+#if 0
+ struct lids_task_acl *task_acl;
+ struct ipt_mark_target_info *markinfo;
+
+ if (lids_load && lids_local_load && family == AF_INET) {
+ if (lids_ext_capable(current, LIDS_SOCKET_NF_MARK) < 0) {
+ struct inode *inode = SOCK_INODE(sock);
+
+ if (inode) {
+ task_acl = current->security;
+ markinfo =
+ kmalloc(sizeof
+ (struct ipt_mark_target_info),
+ GFP_KERNEL);
+ markinfo->mark = task_acl->mark;
+ /* FIXME, need lock?? */
+ inode->i_security = markinfo;
+ LIDS_DBG("DEV: [%d %d] Mark socket as %d \n",
+ current->pid, current->parent->pid,
+ markinfo->mark);
+ }
+ }
+ }
+#endif
+ return;
+}
+
+static int
+lids_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
+{
+ struct sockaddr_in *addr = (struct sockaddr_in *) address;
+ char str[32];
+
+ if (lids_load && lids_local_load && address
+ && address->sa_family == AF_INET) {
+
+ if (lids_ext_capable(current, LIDS_SOCKET_BIND) < 0 ||
+ lids_bind_checker(ntohs(addr->sin_port)) < 0
+ ) {
+ snprintf(str, 32, "bind %u.%u.%u.%u:%d",
+ NIPQUAD(addr->sin_addr),
+ ntohs(addr->sin_port));
+ lids_alert(LIDS_SOCKET, -1, LIDS_SOCKET_BIND,
+ "LIDS_SOCKET_BIND", str);
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
+{
+ struct sockaddr_in *addr = (struct sockaddr_in *) address;
+ char str[32];
+
+ if (lids_load && lids_local_load
+ && address && address->sa_family == AF_INET) {
+ if (lids_ext_capable(current, LIDS_SOCKET_CONNECT) < 0) {
+ snprintf(str, 32, "connect %u.%u.%u.%u:%d",
+ NIPQUAD(addr->sin_addr),
+ ntohs(addr->sin_port));
+ lids_alert(LIDS_SOCKET, -1, LIDS_SOCKET_CONNECT,
+ "LIDS_SOCKET_CONNECT", str);
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_socket_listen(struct socket *sock, int backlog)
+{
+ struct sock *sk = sock->sk;
+
+ if (lids_load && lids_local_load && sk->sk_family == PF_INET) {
+ if (lids_ext_capable(current, LIDS_SOCKET_LISTEN) < 0) {
+ lids_alert(LIDS_SOCKET, -1, LIDS_SOCKET_LISTEN,
+ "LIDS_SOCKET_LISTEN", "listen");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+
+ return 0;
+}
+
+static int
+lids_socket_accept(struct socket *sock, struct socket *newsock)
+{
+ struct sock *sk = sock->sk;
+
+ if (lids_load && lids_local_load && sk->sk_family == PF_INET) {
+ if (lids_ext_capable(current, LIDS_SOCKET_ACCEPT) < 0) {
+ lids_alert(LIDS_SOCKET, -1, LIDS_SOCKET_ACCEPT,
+ "LIDS_SOCKET_ACCEPT", "accept");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_socket_sendmsg(struct socket *sock, struct msghdr *msg, int size)
+{
+ struct sock *sk = sock->sk;
+
+ if (lids_load && lids_local_load && sk->sk_family == PF_INET
+ && sk->sk_type == SOCK_DGRAM) {
+ if (lids_ext_capable(current, LIDS_SOCKET_SENDMSG) < 0) {
+ lids_alert(LIDS_SOCKET, -1, LIDS_SOCKET_SENDMSG,
+ "LIDS_SOCKET_SENDMSG", "sendmsg");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+
+ return 0;
+}
+
+static int
+lids_socket_recvmsg(struct socket *sock, struct msghdr *msg,
+ int size, int flags)
+{
+ struct sock *sk = sock->sk;
+
+ if (lids_load && lids_local_load && sk->sk_family == PF_INET
+ && sk->sk_type == SOCK_DGRAM) {
+ if (lids_ext_capable(current, LIDS_SOCKET_RECVMSG) < 0) {
+ lids_alert(LIDS_SOCKET, -1, LIDS_SOCKET_RECVMSG,
+ "LIDS_SOCKET_RECVMSG", "recvmsg");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_socket_getsockname(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+
+ if (lids_load && lids_local_load && sk->sk_family == PF_INET) {
+ if (lids_ext_capable(current, LIDS_SOCKET_GETSOCKNAME) < 0) {
+ lids_alert(LIDS_SOCKET, -1, LIDS_SOCKET_GETSOCKNAME,
+ "LIDS_SOCKET_GETSOCKNAME", "getsockname");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_socket_getpeername(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+
+ if (lids_load && lids_local_load && sk->sk_family == PF_INET) {
+ if (lids_ext_capable(current, LIDS_SOCKET_GETPEERNAME) < 0) {
+ lids_alert(LIDS_SOCKET, -1, LIDS_SOCKET_GETPEERNAME,
+ "LIDS_SOCKET_GETPEERNAME", "getpeername");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_socket_setsockopt(struct socket *sock, int level, int optname)
+{
+ struct sock *sk = sock->sk;
+
+ if (lids_load && lids_local_load && sk->sk_family == PF_INET) {
+ if (lids_ext_capable(current, LIDS_SOCKET_SETSOCKOPT) < 0) {
+ lids_alert(LIDS_SOCKET, -1, LIDS_SOCKET_SETSOCKOPT,
+ "LIDS_SOCKET_SETSOCKOPT", "setsockopt");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_socket_getsockopt(struct socket *sock, int level, int optname)
+{
+ struct sock *sk = sock->sk;
+
+ if (lids_load && lids_local_load && sk->sk_family == PF_INET) {
+ if (lids_ext_capable(current, LIDS_SOCKET_GETSOCKOPT) < 0) {
+ lids_alert(LIDS_SOCKET, -1, LIDS_SOCKET_GETSOCKOPT,
+ "LIDS_SOCKET_GETSOCKOPT", "getsockopt");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+
+static int
+lids_socket_shutdown(struct socket *sock, int how)
+{
+ struct sock *sk = sock->sk;
+
+ if (lids_load && lids_local_load && sk->sk_family == PF_INET) {
+ if (lids_ext_capable(current, LIDS_SOCKET_SHUTDOWN) < 0) {
+ lids_alert(LIDS_SOCKET, -1, LIDS_SOCKET_SHUTDOWN,
+ "LIDS_SOCKET_SHUTDOWN", "shutdown socket");
+ return LIDS_ERROR(-EPERM);
+ }
+ }
+ return 0;
+}
+#endif /* CONFIG_SECURITY_NETWORK */
+
+static int
+lids_netlink_send(struct sock *sk,struct sk_buff *skb)
+{
+ if (capable(CAP_NET_ADMIN))
+ cap_raise (NETLINK_CB (skb).eff_cap, CAP_NET_ADMIN);
+ else
+ NETLINK_CB (skb).eff_cap = 0;
+ return 0;
+}
+
+static int
+lids_netlink_recv(struct sk_buff *skb, int cap)
+{
+ if (!cap_raised(NETLINK_CB(skb).eff_cap, CAP_NET_ADMIN))
+ return -EPERM;
+ return 0;
+}
+
+static int
+lids_register(const char *name, struct security_operations *ops)
+{
+ if (lids_secondary_ops != NULL) {
+ printk(KERN_INFO
+ "LIDS: There is already a secondary security module registered\n");
+ return -EINVAL;
+ }
+ if (strcmp(name, "owlsm") == 0) {
+ lids_secondary_ops = ops;
+ printk(KERN_NOTICE "LIDS: Registering security module %s.\n",
+ name);
+ return 0;
+ }
+ printk(KERN_NOTICE
+ "LIDS: Only openwall modules may be registered with LIDS.\n");
+ return -EINVAL;
+}
+
+static int
+lids_unregister(const char *name, struct security_operations *ops)
+{
+ if (!lids_secondary_ops) {
+ printk(KERN_NOTICE "LIDS: no secondary module %s.\n", name);
+ return -EINVAL;
+ } else if (ops == lids_secondary_ops) {
+ printk(KERN_NOTICE "LIDS: unregistering module %s.\n", name);
+ return 0;
+ }
+ printk(KERN_INFO "LIDS: Attempt to unregister an unknown module %s.\n",
+ name);
+ return -EINVAL;
+}
+
+struct security_operations lids_security_ops = {
+ .ptrace = lids_ptrace,
+ .capable = lids_capable,
+ .capget = lids_capget,
+ .capset_check = lids_capset_check,
+ .capset_set = lids_capset_set,
+
+ .bprm_alloc_security = lids_bprm_alloc_security,
+ .bprm_free_security = lids_bprm_free_security,
+ .bprm_apply_creds = lids_bprm_apply_creds,
+ .bprm_set_security = lids_bprm_set_security,
+ .bprm_check_security = lids_bprm_check_security,
+
+ .sb_post_mountroot = lids_sb_post_mountroot,
+ .sb_post_remount = lids_sb_post_remount,
+ .sb_kern_mount = lids_sb_kern_mount,
+ .sb_mount = lids_sb_mount,
+
+ .inode_free_security = lids_inode_free_security,
+
+ .inode_link = lids_inode_link,
+ .inode_unlink = lids_inode_unlink,
+ .inode_symlink = lids_inode_symlink,
+ .inode_mkdir = lids_inode_mkdir,
+ .inode_rmdir = lids_inode_rmdir,
+ .inode_mknod = lids_inode_mknod,
+ .inode_rename = lids_inode_rename,
+ .inode_readlink = lids_inode_readlink,
+ .inode_follow_link = lids_inode_follow_link,
+ .inode_permission = lids_inode_permission,
+ .inode_setattr = lids_inode_setattr,
+ .inode_setxattr = lids_inode_setxattr,
+ .inode_getxattr = lids_inode_getxattr,
+ .inode_removexattr = lids_inode_removexattr,
+
+ .d_instantiate = lids_d_instantiate,
+ .file_permission = lids_file_permission,
+
+ .netlink_send = lids_netlink_send,
+ .netlink_recv = lids_netlink_recv,
+
+ .task_alloc_security = lids_task_alloc_security,
+ .task_free_security = lids_task_free_security,
+ .task_kill = lids_task_kill,
+ .task_reparent_to_init = lids_task_reparent_to_init,
+
+/* use common cap */
+ .task_post_setuid = lids_task_post_setuid,
+// .task_reparent_to_init = lids_task_reparent_to_init,
+
+ .register_security = lids_register,
+ .unregister_security = lids_unregister,
+};
+
+extern void setup_lids_module(void);
+
+static void __exit
+lids_lsm_exit(void)
+{
+ struct task_struct *p;
+
+ if (unregister_security(&lids_security_ops)) {
+ printk(KERN_INFO
+ "LIDS: Failure unregistering LIDS with the kernel\n");
+ return;
+ }
+ lids_load = 0;
+
+ lids_sysctl_reset();
+ rcu_read_lock();
+ for_each_process(p) {
+ lids_task_free_security(p);
+ }
+ rcu_read_unlock();
+ printk(KERN_INFO "LIDS: Successful exit\n");
+}
+
+#ifdef MODULE
+static int __init
+lids_modules_init(void)
+{
+ struct task_struct *p;
+
+ rcu_read_lock();
+ for_each_process(p) {
+ p->security = NULL;
+ }
+ rcu_read_unlock();
+ if (do_lids_setup()) {
+ printk(KERN_NOTICE "LIDS_ERR: failed\n");
+ lids_lsm_exit();
+ return -1;
+ }
+ printk(KERN_NOTICE "LIDS: Attaching LIDS ACL to Processes\n");
+
+ lids_setup_task_acl(LIDS_STATE_BOOT);
+
+ printk(KERN_NOTICE "LIDS: Finished setting up.\n");
+
+ return 0;
+}
+#endif
+
+static int __init
+lids_lsm_init(void)
+{
+
+ printk(KERN_NOTICE "LIDS: Initializing...\n");
+
+ lids_init_setup = 0;
+ /* register ourselves with the security framework */
+ if (register_security(&lids_security_ops)) {
+ printk(KERN_INFO "Failure registering LIDS with the kernel\n");
+ return -EINVAL;
+ }
+
+#ifdef MODULE
+ lids_modules_init();
+#endif
+ return 0;
+}
+
+/* for passing parameter */
+__setup("lids=", lids_load_setup);
+security_initcall(lids_lsm_init);
+module_exit(lids_lsm_exit);
+
+MODULE_AUTHOR("LIDS Team");
+MODULE_DESCRIPTION("LIDS Module");
+MODULE_LICENSE("GPL");
diff -Nru linux-2.6.21.1.org/security/lids/lids_socket.c linux-2.6.21.1/security/lids/lids_socket.c
--- linux-2.6.21.1.org/security/lids/lids_socket.c 1970-01-01 09:00:00.000000000 +0900
+++ linux-2.6.21.1/security/lids/lids_socket.c 2007-05-22 11:36:54.000000000 +0900
@@ -0,0 +1,33 @@
+/*
+ * LIDS Socket functions
+ *
+ * Copyright (C) 2002,2003 Huagang Xie <xie@lids.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
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