[PATCH 5/7] SLIM: make and config stuff
From: Kylene Jo Hall
Date: Tue Sep 12 2006 - 13:56:33 EST
This patch contains the Makefile, Kconfig and .h files for SLIM.
Signed-off-by: Mimi Zohar <zohar@xxxxxxxxxx>
Signed-off-by: Kylene Hall <kjhall@xxxxxxxxxx>
---
security/slim/slim.h | 89 +++++++++++++++++++++++++++++++++++++++
security/Kconfig | 1
security/Makefile | 1
security/slim/Kconfig | 36 +++++++++++++++
security/slim/Makefile | 6 ++
5 files changed, 133 insertions(+)
--- linux-2.6.18-rc3/security/slim/Makefile 1969-12-31 18:00:00.000000000 -0600
+++ linux-2.6.18-rc3-working/security/slim/Makefile 2006-08-04 13:29:13.000000000 -0500
@@ -0,0 +1,6 @@
+#
+# Makefile for building the SLIM module as part of the kernel tree.
+#
+
+obj-$(CONFIG_SECURITY_SLIM) += slim.o
+slim-y := slm_main.o slm_secfs.o
--- linux-2.6.18-rc3/security/slim/Kconfig 1969-12-31 18:00:00.000000000 -0600
+++ linux-2.6.18-rc3-working/security/slim/Kconfig 2006-08-04 13:29:13.000000000 -0500
@@ -0,0 +1,36 @@
+config SECURITY_SLIM
+ boolean "SLIM support"
+ depends on SECURITY && SECURITY_NETWORK && INTEGRITY
+ help
+ The Simple Linux Integrity Module implements a modified low water-mark
+ mandatory access control integrity model.
+
+config SECURITY_SLIM_BOOTPARAM
+ bool "SLIM boot parameter"
+ depends on SECURITY_SLIM
+ default n
+ help
+ This option adds a kernel parameter 'slim', which allows SLIM
+ to be disabled at boot. If this option is selected, SLIM
+ functionality can be disabled with slim=0 on the kernel
+ command line. The purpose of this option is to allow a single
+ kernel image to be distributed with SLIM built in, but not
+ necessarily enabled.
+
+ If you are unsure how to answer this question, answer N.
+
+config SECURITY_SLIM_BOOTPARAM_VALUE
+ int "SLIM boot parameter default value"
+ depends on SECURITY_SLIM_BOOTPARAM
+ range 0 1
+ default 1
+ help
+ This option sets the default value for the kernel parameter
+ 'slim', which allows SLIM to be disabled at boot. If this
+ option is set to 0 (zero), the SLIM kernel parameter will
+ default to 0, disabling SLIM at bootup. If this option is
+ set to 1 (one), the SLIM kernel parameter will default to 1,
+ enabling SLIM at bootup.
+
+ If you are unsure how to answer this question, answer 1.
+
--- linux-2.6.18-rc3/security/Makefile 2006-07-30 01:15:36.000000000 -0500
+++ linux-2.6.18-rc3-working/security/Makefile 2006-08-01 12:21:24.000000000 -0500
@@ -3,6 +3,7 @@
#
obj-$(CONFIG_KEYS) += keys/
+obj-$(CONFIG_SECURITY_SLIM) += slim/
subdir-$(CONFIG_SECURITY_SELINUX) += selinux
# if we don't select a security model, use the default capabilities
--- linux-2.6.18-rc3/security/Kconfig 2006-07-30 01:15:36.000000000 -0500
+++ linux-2.6.18-rc3-working/security/Kconfig 2006-08-01 12:21:24.000000000 -0500
@@ -107,5 +107,6 @@ config SECURITY_SECLVL
source security/selinux/Kconfig
+source security/slim/Kconfig
endmenu
--- linux-2.6.18/security/slim/slim.h 1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.17-working/security/slim/slim.h 2006-09-06 11:49:09.000000000 -0700
@@ -0,0 +1,89 @@
+/*
+ * slim.h - simple linux integrity module
+ *
+ * SLIM's specific model is:
+ *
+ * All objects are labeled with extended attributes to indicate:
+ * Integrity Access Class (IAC)
+ * Secrecy Access Class (SAC)
+ *
+ * All processes inherit from their parents:
+ * Integrity Read Access Class (IRAC)
+ * Integrity Write/Execute Access Class (IWXAC)
+ * Secrecy Write Access Class (SWAC)
+ * Secrecy Read/Execute Access Class (SRXAC)
+ *
+ * SLIM enforces the following Mandatory Access Control Rules:
+ * Read:
+ * IRAC(process) <= IAC(object)
+ * SRXAC(process) >= SAC(object)
+ * Write:
+ * IWXAC(process) >= IAC(object)
+ * SWAC(process) <= SAC(process)
+ * Execute:
+ * IWXAC(process) <= IAC(object)
+ * SRXAC(process) >= SAC(object)
+*/
+
+#include <linux/security.h>
+#include <linux/version.h>
+#include <linux/spinlock_types.h>
+
+struct xattr_data {
+ char *name;
+ void *value;
+ size_t len;
+};
+
+ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer,
+ size_t size);
+ssize_t generic_listxattr(struct dentry *dentry, char *buffer,
+ size_t buffer_size);
+int generic_setxattr(struct dentry *dentry, const char *name, const void *value,
+ size_t size, int flags);
+enum slm_iac_level { /* integrity access class */
+ SLM_IAC_ERROR = -2,
+ SLM_IAC_EXEMPT = -1,
+ SLM_IAC_NOTDEFINED = 0,
+ SLM_IAC_UNTRUSTED,
+ SLM_IAC_USER,
+ SLM_IAC_SYSTEM,
+ SLM_IAC_HIGHEST
+};
+extern char *slm_iac_str[];
+
+struct slm_tsec_data { /* task security data (process info) */
+ enum slm_iac_level iac_r; /* read low integrity files */
+ enum slm_iac_level iac_wx; /* ability to write/execute higher */
+ int unlimited; /* unlimited guard process */
+ struct dentry *script_dentry; /* used when filename != interp */
+ spinlock_t lock;
+};
+
+struct slm_file_xattr { /* file extended attributes */
+ enum slm_iac_level iac_level; /* integrity */
+ struct slm_tsec_data guard; /* guard process information */
+};
+
+#define SLM_LSM_ID 0x999
+extern int slm_idx;
+extern int slim_enabled;
+
+struct slm_isec_data {
+ struct slm_file_xattr level;
+ spinlock_t lock;
+};
+
+static inline int is_kernel_thread(struct task_struct *tsk)
+{
+ return (!tsk->mm) ? 1 : 0;
+}
+
+extern struct slm_xattr_config *slm_parse_config(char *data,
+ unsigned long datalen,
+ int *datasize);
+
+extern int slm_init_config(void);
+
+extern __init int slm_init_secfs(void);
+extern __exit void slm_cleanup_secfs(void);
-
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