This RFC provides implementation of WhiteEgret.
Signed-off-by: Masanobu Koike <masanobu2.ko...@toshiba.co.jp>
---
security/Kconfig | 7 +-
security/Makefile | 2 +
security/whiteegret/Kconfig | 21 ++
security/whiteegret/Makefile | 7 +
security/whiteegret/auth.c | 19 ++
security/whiteegret/auth.h | 12 ++
security/whiteegret/dd_com.c | 79 ++++++++
security/whiteegret/dd_com.h | 19 ++
security/whiteegret/gennl.c | 382 +++++++++++++++++++++++++++++++++++++
security/whiteegret/gennl.h | 32 ++++
security/whiteegret/gennl_common.h | 43 +++++
security/whiteegret/init.c | 69 +++++++
security/whiteegret/main.c | 340 +++++++++++++++++++++++++++++++++
security/whiteegret/print_msg.h | 19 ++
security/whiteegret/request.c | 248 ++++++++++++++++++++++++
security/whiteegret/request.h | 79 ++++++++
security/whiteegret/returntoexec.h | 14 ++
security/whiteegret/we.h | 72 +++++++
security/whiteegret/we_common.h | 19 ++
19 files changed, 1482 insertions(+), 1 deletion(-)
create mode 100644 security/whiteegret/Kconfig
create mode 100644 security/whiteegret/Makefile
create mode 100644 security/whiteegret/auth.c
create mode 100644 security/whiteegret/auth.h
create mode 100644 security/whiteegret/dd_com.c
create mode 100644 security/whiteegret/dd_com.h
create mode 100644 security/whiteegret/gennl.c
create mode 100644 security/whiteegret/gennl.h
create mode 100644 security/whiteegret/gennl_common.h
create mode 100644 security/whiteegret/init.c
create mode 100644 security/whiteegret/main.c
create mode 100644 security/whiteegret/print_msg.h
create mode 100644 security/whiteegret/request.c
create mode 100644 security/whiteegret/request.h
create mode 100644 security/whiteegret/returntoexec.h
create mode 100644 security/whiteegret/we.h
create mode 100644 security/whiteegret/we_common.h
diff --git a/security/Kconfig b/security/Kconfig
index 93027fd..acfafb0 100644
--- a/security/Kconfig
+++ b/security/Kconfig
@@ -195,6 +195,7 @@ source security/tomoyo/Kconfig
source security/apparmor/Kconfig
source security/loadpin/Kconfig
source security/yama/Kconfig
+source security/whiteegret/Kconfig
source security/integrity/Kconfig
@@ -204,6 +205,7 @@ choice
default DEFAULT_SECURITY_SMACK if SECURITY_SMACK
default DEFAULT_SECURITY_TOMOYO if SECURITY_TOMOYO
default DEFAULT_SECURITY_APPARMOR if SECURITY_APPARMOR
+ default DEFAULT_SECURITY_WHITEEGRET if SECURITY_WHITEEGRET
default DEFAULT_SECURITY_DAC
help
@@ -222,6 +224,9 @@ choice
config DEFAULT_SECURITY_APPARMOR
bool "AppArmor" if SECURITY_APPARMOR=y
+ config DEFAULT_SECURITY_WHITEEGRET
+ bool "WhiteEgret" if SECURITY_WHITEEGRET=y
+
config DEFAULT_SECURITY_DAC
bool "Unix Discretionary Access Controls"
@@ -233,7 +238,7 @@ config DEFAULT_SECURITY
default "smack" if DEFAULT_SECURITY_SMACK
default "tomoyo" if DEFAULT_SECURITY_TOMOYO
default "apparmor" if DEFAULT_SECURITY_APPARMOR
+ default "whiteegret" if DEFAULT_SECURITY_WHITEEGRET
default "" if DEFAULT_SECURITY_DAC
endmenu
-
diff --git a/security/Makefile b/security/Makefile
index f2d71cd..4fd9ff9 100644
--- a/security/Makefile
+++ b/security/Makefile
@@ -9,6 +9,7 @@ subdir-$(CONFIG_SECURITY_TOMOYO) += tomoyo
subdir-$(CONFIG_SECURITY_APPARMOR) += apparmor
subdir-$(CONFIG_SECURITY_YAMA) += yama
subdir-$(CONFIG_SECURITY_LOADPIN) += loadpin
+subdir-$(CONFIG_SECURITY_WHITEEGRET) += whiteegret
# always enable default capabilities
obj-y += commoncap.o
@@ -24,6 +25,7 @@ obj-$(CONFIG_SECURITY_TOMOYO) += tomoyo/
obj-$(CONFIG_SECURITY_APPARMOR) += apparmor/
obj-$(CONFIG_SECURITY_YAMA) += yama/
obj-$(CONFIG_SECURITY_LOADPIN) += loadpin/
+obj-$(CONFIG_SECURITY_WHITEEGRET) += whiteegret/
obj-$(CONFIG_CGROUP_DEVICE) += device_cgroup.o
# Object integrity file lists
diff --git a/security/whiteegret/Kconfig b/security/whiteegret/Kconfig
new file mode 100644
index 0000000..923316f
--- /dev/null
+++ b/security/whiteegret/Kconfig
@@ -0,0 +1,21 @@
+config SECURITY_WHITEEGRET
+ bool "WhiteEgret support"
+ depends on SECURITY
+ default n
+ help
+ This enables the WhiteEgret security module.
+ WhiteEgret provides a whitelisting execution control capability,
+ which helps to stop the execution of unauthorized software
+ such as malware.
+ You will also need a user application and an execution whitelist.
+ If you are unsure how to answer this question, answer N.
+
+config SECURITY_WHITEEGRET_DRIVER
+ bool "Use device driver in communication with user space"
+ depends on SECURITY_WHITEEGRET
+ default n
+ help
+ This option selects whether you use a device driver
+ for communication between kernel space and user space.
+ If you do not set this option, netlink is selected for
+ communication between two spaces.
diff --git a/security/whiteegret/Makefile b/security/whiteegret/Makefile
new file mode 100644
index 0000000..ed8eb9f
--- /dev/null
+++ b/security/whiteegret/Makefile
@@ -0,0 +1,7 @@
+obj-$(CONFIG_SECURITY_WHITEEGRET) += whiteegret.o
+whiteegret-y := init.o main.o request.o
+ifdef CONFIG_SECURITY_WHITEEGRET_DRIVER
+whiteegret-y += dd_com.o
+else
+whiteegret-y += gennl.o auth.o
+endif
diff --git a/security/whiteegret/auth.c b/security/whiteegret/auth.c
new file mode 100644
index 0000000..dd2c9eb
--- /dev/null
+++ b/security/whiteegret/auth.c
@@ -0,0 +1,19 @@
+/*
+ * WhiteEgret Linux Security Module
+ *
+ * Copyright (C) 2017 Toshiba Corporation
+ */
+
+#include "auth.h"
+
+/**
+ * userproc_auth - Authenticate user's whitelisting application process.
+ *
+ * @authinfo: authentication credentials
+ *
+ * Returns 1 if authenticated, 0 otherwise.
+ */
+int userproc_auth(char *authinfo)
+{
+ return 1;
+}
diff --git a/security/whiteegret/auth.h b/security/whiteegret/auth.h
new file mode 100644
index 0000000..ddcd2dd
--- /dev/null
+++ b/security/whiteegret/auth.h
@@ -0,0 +1,12 @@
+/*
+ * WhiteEgret Linux Security Module
+ *
+ * Copyright (C) 2017 Toshiba Corporation
+ */
+
+#ifndef _AUTH_H
+#define _AUTH_H
+
+int userproc_auth(char *authinfo);
+
+#endif
diff --git a/security/whiteegret/dd_com.c b/security/whiteegret/dd_com.c
new file mode 100644
index 0000000..534c4d5
--- /dev/null
+++ b/security/whiteegret/dd_com.c
@@ -0,0 +1,79 @@
+/*
+ * WhiteEgret Linux Security Module
+ *
+ * Copyright (C) 2017 Toshiba Corporation
+ */
+
+#include "dd_com.h"
+#include "request.h"
+#include "we.h"
+#include "print_msg.h"
+
+struct task_struct *from_task;
+
+/**
+ * start_we - Enable WhiteEgret.
+ *
+ * Returns pointer to we_req_q_head.
+ */
+struct we_req_q_head *start_we(void)
+{
+ if (from_task) {
+ PRINT_WARNING("WhiteEgret has already started.\n");
+ return NULL;
+ }
+
+ write_lock(&(we_q_head.lock));
+ from_task = current;
+ write_unlock(&(we_q_head.lock));
+
+ return &we_q_head;
+}
+EXPORT_SYMBOL(start_we);
+
+/**
+ * stop_we - Disable WhiteEgret.
+ *
+ * Returns -EPERM if the task invoking this function is not valid,
+ * 0 otherwise.
+ */
+int stop_we(void)
+{
+ if (!from_task) {
+ PRINT_WARNING("WhiteEgret has not started.\n");
+ return -EPERM;
+ }
+ if (from_task != current) {
+ PRINT_WARNING("This task is not registered to WhiteEgret.\n");
+ return -EPERM;
+ }
+
+ we_req_q_cleanup();
+
+ write_lock(&(we_q_head.lock));
+ from_task = NULL;
+ write_unlock(&(we_q_head.lock));
+
+ return 0;
+}
+EXPORT_SYMBOL(stop_we);
+
+/**
+ * send_we_obj_info - Wait response from user's whitelisting application.
+ *
+ * @req: Pointer to struct we_req_q.
+ *
+ * Returns 0 if succeeded, < 0 otherwise.
+ */
+int send_we_obj_info(struct we_req_q *req)
+{
+ /* If there exists queue waiting for this request req done,
+ * then wake up it.
+ */
+ if (waitqueue_active(&(we_q_head.waitq)))
+ wake_up(&(we_q_head.waitq));
+
+ return wait_event_interruptible_timeout(req->waitq,
+ (req->finish_flag == START_EXEC),
+ WERESULTTIMEOUT);
+}
diff --git a/security/whiteegret/dd_com.h b/security/whiteegret/dd_com.h
new file mode 100644
index 0000000..9c7c5b8
--- /dev/null
+++ b/security/whiteegret/dd_com.h
@@ -0,0 +1,19 @@
+/*
+ * WhiteEgret Linux Security Module
+ *
+ * Copyright (C) 2017 Toshiba Corporation
+ */
+
+#ifndef _DD_COM_H
+#define _DD_COM_H
+
+#include "request.h"
+
+extern struct task_struct *from_task;
+
+extern struct we_req_q_head *start_we(void);
+extern int stop_we(void);
+
+int send_we_obj_info(struct we_req_q *req);
+
+#endif /* _DD_COM_H */
diff --git a/security/whiteegret/gennl.c b/security/whiteegret/gennl.c
new file mode 100644
index 0000000..10a1113
--- /dev/null
+++ b/security/whiteegret/gennl.c
@@ -0,0 +1,382 @@
+/*
+ * WhiteEgret Linux Security Module
+ *
+ * Copyright (C) 2017 Toshiba Corporation
+ */
+
+#include <linux/pid.h>
+#include <linux/cred.h>
+#include <linux/security.h>
+#include <net/genetlink.h>
+
+#include "auth.h"
+#include "gennl_common.h"
+#include "gennl.h"
+#include "returntoexec.h"
+#include "we_common.h"
+#include "we.h"
+#include "request.h"
+#include "print_msg.h"
+
+/* global variables */
+int from_pid = -1; /* pid of user's whitelisting application */
+struct net *from_net;
+u32 seq; /* sequence number */
+
+/* attribute policy */
+static struct nla_policy we_genl_policy[WE_A_MAX + 1] = {
+ [WE_A_UNSPEC] = { .type = NLA_STRING },
+ [WE_A_AUTHINFO] = { .type = NLA_BINARY,
+ .len = AUTHINFOLENGTH },
+ [WE_A_SHORTNAME] = { .type = NLA_STRING,
+ .len = SHORTNAMELENGTH },
+ [WE_A_PATH] = { .type = NLA_STRING },
+ [WE_A_EXECPERMISSION] = { .type = NLA_FLAG },
+};
+
+/* operation definition */
+static struct genl_ops we_gnl_opses[] = {
+ {
+ .cmd = WE_C_UNSPEC,
+ .flags = 0,
+ .policy = we_genl_policy,
+ .doit = we_unspec,
+ .dumpit = NULL,
+ },
+ {
+ .cmd = WE_C_USERREGISTER,
+ .flags = 0,
+ .policy = we_genl_policy,
+ .doit = we_userregister,
+ .dumpit = NULL,
+ },
+ {
+ .cmd = WE_C_USERUNREGISTER,
+ .flags = 0,
+ .policy = we_genl_policy,
+ .doit = we_userunregister,
+ .dumpit = NULL,
+ },
+ {
+ .cmd = WE_C_EXECPERMISSION,
+ .flags = 0,
+ .policy = we_genl_policy,
+ .doit = we_execpermission,
+ .dumpit = NULL,
+ },
+};
+
+/* family definition */
+static struct genl_family we_gnl_family = {
+ .name = WE_FAMILY_NAME,
+ .version = WE_FAMILY_VERSION,
+ .maxattr = WE_A_MAX,
+ .ops = we_gnl_opses,
+ .n_ops = ARRAY_SIZE(we_gnl_opses),
+ .module = THIS_MODULE,
+};
+
+/**
+ * we_netlink_register - Initialize netlink.
+ *
+ * Returns 0 if succeeded, < 0 otherwise.
+ */
+int we_netlink_register(void)
+{
+ int rc;
+
+ PRINT_INFO("%s starts.\n", __func__);
+
+ rc = genl_register_family(&we_gnl_family);
+ if (rc != 0) {
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ from_net = kmalloc(sizeof(struct net), GFP_KERNEL);
+ if (!from_net) {
+ rc = -ENOMEM;
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ PRINT_WARNING("Netlink is registered by WhiteEgret.\n");
+
+ return 0;
+}
+
+/**
+ * we_netlink_unregister - Close netlink.
+ *
+ * Returns 0 if succeeded, < 0 otherwise.
+ */
+int we_netlink_unregister(void)
+{
+ int rc;
+
+ PRINT_INFO("%s starts.\n", __func__);
+
+ rc = genl_unregister_family(&we_gnl_family);
+ if (rc != 0) {
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ if (from_net != NULL) {
+ kfree(from_net);
+ from_net = NULL;
+ }
+
+ PRINT_WARNING("Netlink is unregistered by WhiteEgret.\n");
+
+ return 0;
+}
+
+/**
+ * we_unspec - Receive handler for unspecified.
+ *
+ * @buf: Pointer to struct sk_buff.
+ * @info: Pointer to struct genl_info.
+ *
+ * Returns 0.
+ */
+int we_unspec(struct sk_buff *buf, struct genl_info *info)
+{
+ PRINT_INFO("Some message is handled at %s.\n", __func__);
+
+ /* do something if necessary */
+
+ return 0;
+}
+
+/**
+ * we_userregister - Register user's whitelisting application.
+ *
+ * @buf: Pointer to struct sk_buff.
+ * @info: Pointer to struct genl_info.
+ *
+ * Returns 0 if succeeded, < 0 otherwise.
+ */
+int we_userregister(struct sk_buff *buf, struct genl_info *info)
+{
+ int rc;
+ struct pid *usrpid;
+ struct task_struct *usrtask;
+#ifdef CONFIG_NET_NS
+ const struct cred *usrcred;
+#endif
+
+ PRINT_INFO("Some message is handled at %s.\n", __func__);
+
+ if (from_pid != -1) {
+ PRINT_WARNING
+ ("The pid %d is already registered to WhiteEgret.\n",
+ from_pid);
+ rc = -EACCES;
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ usrpid = find_get_pid(info->snd_portid);
+ if (usrpid == NULL) {
+ rc = -EACCES;
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ usrtask = get_pid_task(usrpid, PIDTYPE_PID);
+ if (usrtask == NULL) {
+ rc = -EACCES;
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+#ifdef CONFIG_NET_NS
+ usrcred = get_task_cred(usrtask);
+ if (usrcred == NULL) {
+ rc = -EACCES;
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ if ((security_capable(usrcred, genl_info_net(info)->user_ns,
+ CAP_NET_ADMIN)) != 0) {
+ rc = -EACCES;
+ PRINT_ERROR(rc);
+ return rc;
+ }
+#endif
+
+ rc = userproc_auth((char *)nla_data(info->attrs[WE_A_AUTHINFO]));
+ if (rc <= 0) {
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ from_pid = info->snd_portid;
+ memcpy(from_net, genl_info_net(info), sizeof(struct net));
+
+ seq = info->snd_seq;
+
+ PRINT_WARNING("The pid %d is registered to WhiteEgret.\n", from_pid);
+
+ return 0;
+}
+
+/**
+ * we_userunregister - Unregister user's whitelisting application
+ * invoked by itself.
+ *
+ * @buf: Pointer to struct sk_buff.
+ * @info: Pointer to struct genl_info.
+ *
+ * Returns 0 if succeeded, < 0 otherwise.
+ */
+int we_userunregister(struct sk_buff *buf, struct genl_info *info)
+{
+ int rc;
+
+ PRINT_INFO("Some message is handled at %s.\n", __func__);
+
+ if (from_pid != info->snd_portid) {
+ rc = -EACCES;
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ rc = userproc_auth((char *)nla_data(info->attrs[WE_A_AUTHINFO]));
+ if (rc <= 0) {
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ PRINT_WARNING("The pid %d is unregistered to WhiteEgret.\n", from_pid);
+
+ from_pid = -1;
+
+ return 0;
+}
+
+/**
+ * we_execpermission - Receive handler for execution permission.
+ *
+ * @buf: Pointer to struct sk_buff.
+ * @info: Pointer to struct genl_info.
+ *
+ * Returns 0 if succeeded, < 0 otherwise.
+ */
+int we_execpermission(struct sk_buff *buf, struct genl_info *info)
+{
+ int rc = 0;
+ struct we_req_data data;
+
+ PRINT_INFO("Some message is handled at %s.\n", __func__);
+
+ if (from_pid != info->snd_portid) {
+ rc = -EACCES;
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ data.seq = info->snd_seq;
+ memcpy(&(data.shortname), nla_data(info->attrs[WE_A_SHORTNAME]),
+ SHORTNAMELENGTH);
+ if (we_req_q_search(&data) == NULL) {
+ PRINT_INFO("(%s, %d) is not waiting for execution.\n",
+ data.shortname, data.seq);
+ return 0;
+ }
+
+ rc = returntoexec(nla_get_flag(info->attrs[WE_A_EXECPERMISSION]),
+ &data);
+ if (rc != 0) {
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ we_req_q_specific_pull(&data);
+
+ PRINT_INFO("%s done (%s, %d).\n", __func__, data.shortname, data.seq);
+
+ return 0;
+}
+
+/**
+ * send_we_obj_info - Send request for matching white list.
+ *
+ * @we_info: Pointer to struct we_obj_info.
+ *
+ * Returns 0 if succeeded, < 0 otherwise.
+ */
+int send_we_obj_info(struct we_obj_info *we_info)
+{
+ int rc = 0;
+ void *msg_head;
+ struct sk_buff *send_skb;
+
+ if ((from_pid == -1) || (from_net == NULL)) {
+ rc = -EINVAL;
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ send_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (send_skb == NULL) {
+ rc = -ENOMEM;
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ msg_head = genlmsg_put(send_skb, 0, seq, &we_gnl_family, 0,
+ WE_C_EXECPERMISSION);
+ if (msg_head == NULL) {
+ rc = -ENOMEM;
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ rc = nla_put_string(send_skb, WE_A_SHORTNAME,
+ we_info->shortname);
+ if (rc != 0) {
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ rc = nla_put_string(send_skb, WE_A_PATH, we_info->path);
+ if (rc != 0) {
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ genlmsg_end(send_skb, msg_head);
+
+ PRINT_INFO("Msg (%s, %s) sent to the pid %d (current process: %d)\n",
+ we_info->shortname, we_info->path,
+ from_pid, we_info->pid);
+
+ rc = genlmsg_unicast(from_net, send_skb, from_pid);
+ if (rc != 0) {
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ return 0;
+}
+
+/**
+ * inc_seq - Increment sequence number.
+ */
+void inc_seq(void)
+{
+ seq += 1;
+}
+
+/**
+ * get_seq - Return sequence number.
+ *
+ * Returns sequence number.
+ */
+int get_seq(void)
+{
+ return seq;
+}
diff --git a/security/whiteegret/gennl.h b/security/whiteegret/gennl.h
new file mode 100644
index 0000000..8b751b2
--- /dev/null
+++ b/security/whiteegret/gennl.h
@@ -0,0 +1,32 @@
+/*
+ * WhiteEgret Linux Security Module
+ *
+ * Copyright (C) 2017 Toshiba Corporation
+ */
+
+#ifndef _GENNL_H
+#define _GENNL_H
+
+#include <net/genetlink.h>
+#include "we.h"
+
+extern int from_pid;
+
+/* handler */
+int we_unspec(struct sk_buff *buf, struct genl_info *info);
+int we_userregister(struct sk_buff *buf, struct genl_info *info);
+int we_userunregister(struct sk_buff *buf, struct genl_info *info);
+int we_execpermission(struct sk_buff *buf, struct genl_info *info);
+
+/* register/unregister */
+int we_netlink_register(void);
+int we_netlink_unregister(void);
+
+/* send message to user space */
+int send_we_obj_info(struct we_obj_info *info);
+
+/* manipulate sequence number */
+void inc_seq(void);
+int get_seq(void);
+
+#endif /* _GENNL_H */
diff --git a/security/whiteegret/gennl_common.h
b/security/whiteegret/gennl_common.h
new file mode 100644
index 0000000..e59615b
--- /dev/null
+++ b/security/whiteegret/gennl_common.h
@@ -0,0 +1,43 @@
+/*
+ * WhiteEgret Linux Security Module
+ *
+ * Copyright (C) 2017 Toshiba Corporation
+ */
+
+#ifndef _GENNL_COMMON_H
+#define _GENNL_COMMON_H
+
+/* UWA stands for User's Whitelisting Application */
+
+/* Netlink attributes */
+enum {
+ WE_A_UNSPEC, /* unspecified message */
+ WE_A_AUTHINFO, /* authentication info for UWA registration */
+ WE_A_SHORTNAME, /* short name for an object to be examined */
+ WE_A_PATH, /* full path for an object to be examined */
+ WE_A_EXECPERMISSION, /* flag if the object is in the whitelist */
+ __WE_A_MAX,
+};
+
+/* Number of netlink attributes */
+#define WE_A_MAX (__WE_A_MAX - 1)
+
+/* Name of genl_family */
+#define WE_FAMILY_NAME "WhiteEgret"
+
+/* Version number of genl_family */
+#define WE_FAMILY_VERSION 1
+
+/* Netlink commands */
+enum {
+ WE_C_UNSPEC, /* unspecified message */
+ WE_C_USERREGISTER, /* register UWA */
+ WE_C_USERUNREGISTER,
+ WE_C_EXECPERMISSION, /* execution permission */
+ __WE_C_MAX,
+};
+
+/* Number of netlink commands */
+#define WE_C_MAX (__WE_C_MAX - 1)
+
+#endif /* _GENNL_COMMON_H */
diff --git a/security/whiteegret/init.c b/security/whiteegret/init.c
new file mode 100644
index 0000000..76254ef
--- /dev/null
+++ b/security/whiteegret/init.c
@@ -0,0 +1,69 @@
+/*
+ * WhiteEgret Linux Security Module
+ *
+ * Copyright (C) 2017 Toshiba Corporation
+ */
+
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/security.h>
+#include <linux/fs.h>
+#include <linux/lsm_hooks.h>
+#include "we.h"
+#include "print_msg.h"
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("WhiteEgret Linux Security Module");
+MODULE_VERSION("1.0.0");
+
+static int we_security_bprm_check(struct linux_binprm *bprm)
+{
+ if (we_security_bprm_check_main(bprm) == -EPERM)
+ return -EPERM;
+
+ return 0;
+}
+
+static int we_security_mmap_check(struct file *file, unsigned long reqprot,
+ unsigned long prot, unsigned long flags)
+{
+ if (we_security_mmap_check_main(file, reqprot, flags) == -EPERM)
+ return -EPERM;
+
+ return 0;
+}
+
+static struct security_hook_list we_hooks[] = {
+ LSM_HOOK_INIT(bprm_check_security, we_security_bprm_check),
+ LSM_HOOK_INIT(mmap_file, we_security_mmap_check),
+};
+
+static int __init we_init(void)
+{
+ int rc;
+
+ if (!security_module_enable("whiteegret"))
+ return 0;
+
+ security_add_hooks(we_hooks, ARRAY_SIZE(we_hooks), "whiteegret");
+
+ rc = we_specific_init();
+ if (rc) {
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ PRINT_WARNING("WhiteEgret (LSM) initialized.\n");
+
+ return 0;
+}
+
+static void __exit we_exit(void)
+{
+ we_specific_exit();
+
+ PRINT_WARNING("WhiteEgret (LSM) exited.\n");
+}
+
+module_init(we_init);
+module_exit(we_exit);
diff --git a/security/whiteegret/main.c b/security/whiteegret/main.c
new file mode 100644
index 0000000..8ba97db
--- /dev/null
+++ b/security/whiteegret/main.c
@@ -0,0 +1,340 @@
+/*
+ * WhiteEgret Linux Security Module
+ *
+ * Copyright (C) 2017 Toshiba Corporation
+ */
+
+#include <linux/semaphore.h>
+#include <linux/binfmts.h>
+#include <linux/dcache.h>
+#include <linux/fs.h>
+#include <linux/mman.h>
+#include "we_common.h"
+#include "we.h"
+#include "request.h"
+#include "print_msg.h"
+
+#ifdef CONFIG_SECURITY_WHITEEGRET_DRIVER
+
+#include <linux/sched.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include "dd_com.h"
+
+#else
+
+#include "gennl.h"
+#include "returntoexec.h"
+
+struct we_req_data reqdata; /* data of executable */
+struct semaphore we_result_lock;
+int result = -1; /* result of matching to white list */
+
+#endif
+
+static int send_receive_we_obj_info(
+ struct we_obj_info *we_obj_info, int *checkresult);
+
+/**
+ * we_specific_init - Initialize netlink and semaphore.
+ *
+ * Returns 0.
+ */
+int we_specific_init(void)
+{
+#ifndef CONFIG_SECURITY_WHITEEGRET_DRIVER
+ int rc = 0;
+
+ rc = we_netlink_register();
+ if (rc < 0) {
+ PRINT_ERROR(rc);
+ return rc;
+ }
+
+ sema_init(&we_result_lock, 1);
+#endif
+ we_req_q_head_init();
+
+ return 0;
+}
+
+/**
+ * we_specific_exit - Close netlink.
+ *
+ * Returns 0.
+ */
+int we_specific_exit(void)
+{
+#ifndef CONFIG_SECURITY_WHITEEGRET_DRIVER
+ we_netlink_unregister();
+#endif
+
+ return 0;
+}
+
+/**
+ * we_check_main - Common function for security_bprm_check and mmap_file.
+ *
+ * @file: Pointer to struct file.
+ *
+ * Returns 0 if succeeded, < 0 otherwise.
+ */
+int we_check_main(struct file *file)
+{
+ struct we_obj_info we_obj_info;
+ char *pathnamebuf;
+ char *new_pathnamebuf;
+ char *pathname;
+ char *shortnamebuf;
+ int pathsize;
+ int rc;
+ int i;
+ int checkresult;
+
+ if (unlikely(file == NULL))
+ return 0;
+
+ pathsize = EXPECTPATHSIZE;
+ pathnamebuf = kmalloc(pathsize, GFP_KERNEL);
+ if (unlikely(!pathnamebuf)) {
+ rc = -ENOMEM;
+ PRINT_ERROR(rc);
+ goto failure;
+ }
+ while (pathsize <= MAXPATHSIZE) {
+ pathname = d_absolute_path(&file->f_path, pathnamebuf,
+ pathsize-1);
+ if (!IS_ERR(pathname))
+ break;
+
+ pathsize += ADDEDEXPECTPATHSIZE;
+ new_pathnamebuf = krealloc(pathnamebuf, pathsize,
+ GFP_KERNEL);
+ if (unlikely(!new_pathnamebuf)) {
+ rc = -ENOMEM;
+ PRINT_ERROR(rc);
+ goto failure;
+ }
+ pathnamebuf = new_pathnamebuf;
+ }
+ if (unlikely(pathsize >= MAXPATHSIZE)) {
+ rc = -ENOMEM;
+ PRINT_ERROR(rc);
+ goto failure;
+ }
+
+ shortnamebuf = pathname;
+ for (i = 0; i < pathsize; i++) {
+ if (pathname[i] == '\0')
+ break;
+ if (pathname[i] == '/')
+ shortnamebuf = pathname + (i + 1);
+ }
+ strncpy(we_obj_info.shortname, shortnamebuf, SHORTNAMELENGTH);
+ we_obj_info.path = pathname;
+ we_obj_info.pid = current->pid;
+#ifdef CONFIG_SECURITY_WHITEEGRET_DRIVER
+ we_obj_info.pathsize = strlen(pathname);
+ we_obj_info.ppid = current->tgid;
+#endif
+
+#ifndef CONFIG_SECURITY_WHITEEGRET_DRIVER
+ rc = down_timeout(&we_result_lock, WERESULTTIMEOUT);
+ if (rc != 0)
+ goto failure;
+ inc_seq();
+#endif
+ rc = send_receive_we_obj_info(&we_obj_info, &checkresult);
+ if (rc < 0)
+ goto failure;
+
+ rc = checkresult;
+
+ if (rc == -EPERM)
+ PRINT_WARNING("block %s.\n", pathname);
+ else
+ PRINT_INFO("permit %s.\n", pathname);
+
+#ifndef CONFIG_SECURITY_WHITEEGRET_DRIVER
+ up(&we_result_lock);
+#endif
+
+failure:
+ if (pathnamebuf != NULL) {
+ kfree(pathnamebuf);
+ pathnamebuf = NULL;
+ }
+
+ if ((rc != 0) && (rc != -EPERM))
+ PRINT_WARNING("Checking white list does not work.\n");
+
+ return rc;
+}
+
+/**
+ * send_receive_we_obj_info - Send message and wait.
+ *
+ * @we_obj_info: Pointer to struct we_obj_info.
+ * @result: Pointer to result of matching to white list.
+ *
+ * Returns 0 if succeeded, < 0 otherwise.
+ */
+static int send_receive_we_obj_info(
+ struct we_obj_info *we_obj_info, int *checkresult)
+{
+ int i;
+ int rc;
+ struct we_req_q req;
+
+ we_req_q_init(&req, we_obj_info);
+
+ if ((we_req_q_search(&(req.data))) == NULL) {
+ rc = we_req_q_push(&req);
+ if (rc < 0) {
+ PRINT_ERROR(rc);
+ goto failure;
+ }
+ }
+
+#ifdef CONFIG_SECURITY_WHITEEGRET_DRIVER
+
+ for (i = 0; i < MAXCOMRETRY; i++) {
+ rc = send_we_obj_info(&req);
+
+ if (likely(req.finish_flag == START_EXEC)) {
+ break;
+ } else if (unlikely(rc == -ERESTARTSYS)) {
+ rc = -EINVAL;
+ break;
+ }
+ }
+
+ we_req_q_pop(&req);
+
+ if (unlikely(i >= MAXCOMRETRY) && req.finish_flag != START_EXEC) {
+ rc = -EINVAL;
+ PRINT_ERROR(rc);
+ }
+
+ *checkresult = req.permit;
+
+ return rc;
+
+#else
+
+ for (i = 0; i < MAXCOMRETRY; i++) {
+ rc = send_we_obj_info(we_obj_info);
+ if (rc < 0)
+ continue;
+
+ rc = wait_for_completion_interruptible_timeout(&(req.evt),
+ WEGENNLTIMEOUT);
+ if (rc <= 0) {
+ if (unlikely(rc == -ERESTARTSYS)) {
+ we_req_q_del(&(req.data));
+ rc = -EINVAL;
+ PRINT_ERROR(rc);
+ goto failure;
+ }
+ if (rc == 0)
+ rc = -ETIMEDOUT;
+ continue;
+ } else {
+ break;
+ }
+ }
+
+ if (unlikely(i >= MAXCOMRETRY)) {
+ we_req_q_del(&(req.data));
+ rc = -EINVAL;
+ PRINT_ERROR(rc);
+ goto failure;
+ }
+
+ *checkresult = result;
+
+ return 0;
+
+#endif /* CONFIG_SECURITY_WHITEEGRET_DRIVER */
+
+failure:
+#ifndef CONFIG_SECURITY_WHITEEGRET_DRIVER
+ up(&we_result_lock);
+#endif
+ return rc;
+}
+
+/**
+ * we_security_bprm_check_main - Target for security_bprm_check.
+ *
+ * @bprm: Pointer to struct linux_binprm.
+ *
+ * Returns 0 if succeeded, < 0 otherwise.
+ */
+int we_security_bprm_check_main(struct linux_binprm *bprm)
+{
+#ifdef CONFIG_SECURITY_WHITEEGRET_DRIVER
+ if (unlikely(!from_task))
+#else
+ if (unlikely(from_pid == -1))
+#endif
+ return 0;
+
+ return we_check_main(bprm->file);
+}
+
+/**
+ * we_security_mmap_check_main - Target for mmap_file.
+ *
+ * @file: Pointer to struct file to map.
+ * @reqprot: Protection requested by the application.
+ * @flags: Operational flags.
+ *
+ * Returns 0 if succeeded, < 0 otherwise.
+ */
+int we_security_mmap_check_main(struct file *file,
+ unsigned long reqprot, unsigned long flags) {
+#ifdef CONFIG_SECURITY_WHITEEGRET_DRIVER
+ if (unlikely(!from_task))
+#else
+ if (unlikely(from_pid == -1))
+#endif
+ return 0;
+
+ if (!(reqprot & PROT_EXEC))
+ return 0;
+
+ if ((flags & MAP_EXECUTABLE))
+ return 0;
+
+ if (!file)
+ return 0;
+
+ if (!file->f_path.dentry)
+ return 0;
+
+ return we_check_main(file);
+}
+
+#ifndef CONFIG_SECURITY_WHITEEGRET_DRIVER
+
+/**
+ * returntoexec - Record matching data and result.
+ *
+ * @result_: Result whether targeted object is included in the white list.
+ * @reqdata_: Pointer to struct we_req_data.
+ *
+ * Returns 0.
+ */
+int returntoexec(int result_, struct we_req_data *reqdata_)
+{
+ if (!result_)
+ result = -EPERM;
+ else
+ result = 0;
+ memcpy(&reqdata, reqdata_, sizeof(struct we_req_data));
+
+ return 0;
+}
+
+#endif
diff --git a/security/whiteegret/print_msg.h b/security/whiteegret/print_msg.h
new file mode 100644
index 0000000..2d6fe86
--- /dev/null
+++ b/security/whiteegret/print_msg.h
@@ -0,0 +1,19 @@
+/*
+ * WhiteEgret Linux Security Module
+ *
+ * Copyright (C) 2017 Toshiba Corporation
+ */
+
+#ifndef _PRINT_MSG_H
+#define _PRINT_MSG_H
+
+#include <linux/kernel.h>
+
+#define __STR(x) #x
+#define __STR2(x) __STR(x)
+#define ERROR_MSG "error %d at "__STR2(__LINE__)" on " __STR2(__FILE__)"\n"
+#define PRINT_ERROR(errno) pr_err("WhiteEgret: " ERROR_MSG, errno)
+#define PRINT_WARNING(fmt, ...) pr_warn("WhiteEgret: " fmt, ##__VA_ARGS__)
+#define PRINT_INFO(fmt, ...) pr_info("WhiteEgret: " fmt, ##__VA_ARGS__)
+
+#endif
diff --git a/security/whiteegret/request.c b/security/whiteegret/request.c
new file mode 100644
index 0000000..fc1da9b
--- /dev/null
+++ b/security/whiteegret/request.c
@@ -0,0 +1,248 @@
+/*
+ * WhiteEgret Linux Security Module
+ *
+ * Copyright (C) 2017 Toshiba Corporation
+ */
+
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/rwlock_types.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include "we_common.h"
+#include "request.h"
+#include "print_msg.h"
+
+#ifndef CONFIG_SECURITY_WHITEEGRET_DRIVER
+#include "gennl.h"
+#endif
+
+struct we_req_q_head we_q_head;
+
+static int match_we_req_data(struct we_req_data *data1,
+ struct we_req_data *data2);
+
+/**
+ * we_req_q_init - Initialize the global variable we_q_head.
+ *
+ * Returns 0.
+ */
+int we_req_q_head_init(void)
+{
+ rwlock_init(&(we_q_head.lock));
+ INIT_LIST_HEAD(&(we_q_head.head));
+#ifdef CONFIG_SECURITY_WHITEEGRET_DRIVER
+ init_waitqueue_head(&(we_q_head.waitq));
+#endif
+
+ return 0;
+}
+
+/**
+ * we_req_q_push - Add queue to tail of the list.
+ *
+ * @queue: Pointer to we_req_q to be added to the list.
+ *
+ * Returns 0.
+ */
+int we_req_q_push(struct we_req_q *queue)
+{
+#ifndef CONFIG_SECURITY_WHITEEGRET_DRIVER
+ init_completion(&(queue->evt));
+#endif
+
+ write_lock(&(we_q_head.lock));
+ list_add_tail(&(queue->queue), &we_q_head.head);
+ write_unlock(&(we_q_head.lock));
+
+ return 0;
+}
+
+/**
+ * we_req_q_search - Search data in the list.
+ *
+ * @data: Pointer to we_req_data to be searched in the list.
+ *
+ * Returns pointer to data if data is found in the list,
+ * NULL otherwise.
+ */
+struct we_req_q *we_req_q_search(struct we_req_data *data)
+{
+ struct list_head *p;
+ struct we_req_q *req;
+
+ read_lock(&(we_q_head.lock));
+
+ list_for_each(p, &(we_q_head.head)) {
+ req = list_entry(p, struct we_req_q, queue);
+
+ if (match_we_req_data(data, &(req->data))) {
+ read_unlock(&(we_q_head.lock));
+ return req;
+ }
+ }
+
+ read_unlock(&(we_q_head.lock));
+
+ return NULL;
+}
+
+#ifdef CONFIG_SECURITY_WHITEEGRET_DRIVER
+
+/**
+ * we_req_q_init - Initialize queue.
+ *
+ * @req: Pointer to we_req_q to be initialized.
+ * @info: Pointer to we_obj_info.
+ *
+ * Returns 0.
+ */
+int we_req_q_init(struct we_req_q *req, struct we_obj_info *info)
+{
+ req->finish_flag = STOP_EXEC;
+ req->data.we_obj_info = info;
+ req->permit = -EPERM;
+ init_waitqueue_head(&req->waitq);
+
+ return 0;
+}
+
+/**
+ * we_req_q_pop - Delete queue in the list.
+ *
+ * Returns 0.
+ */
+int we_req_q_pop(struct we_req_q *queue)
+{
+ write_lock(&(we_q_head.lock));
+ list_del(&queue->queue);
+ write_unlock(&(we_q_head.lock));
+
+ return 0;
+}
+
+/**
+ * match_we_req_data - Compare two we_req_data data.
+ *
+ * @data1: Pointer to we_req_data
+ * @data2: Pointer to we_req_data
+ *
+ * Returns 1 if all members of both we_req_data data are equal,
+ * 0 otherwise.
+ */
+static int match_we_req_data(struct we_req_data *data1,
+ struct we_req_data *data2)
+{
+ if (data1->we_obj_info->ppid == data2->we_obj_info->ppid)
+ return 1;
+
+ return 0;
+}
+
+/**
+ * we_req_q_cleanup - Cleaning up queues.
+ *
+ * Returns 0.
+ */
+int we_req_q_cleanup(void)
+{
+ struct list_head *p;
+ struct we_req_q *req;
+
+ write_lock(&(we_q_head.lock));
+ list_for_each(p, &we_q_head.head) {
+ req = list_entry(p, struct we_req_q, queue);
+ req->finish_flag = START_EXEC;
+ req->permit = -EINVAL;
+ }
+ write_unlock(&(we_q_head.lock));
+
+ return 0;
+}
+
+#else /* CONFIG_SECURITY_WHITEEGRET_DRIVER */
+
+/**
+ * we_req_q_init - Initialize queue.
+ *
+ * @req: Pointer to we_req_q to be initialized.
+ * @info: Pointer to we_obj_info.
+ *
+ * Returns 0.
+ */
+int we_req_q_init(struct we_req_q *req, struct we_obj_info *info)
+{
+ strncpy(req->data.shortname, info->shortname, SHORTNAMELENGTH);
+ req->data.seq = get_seq();
+
+ return 0;
+}
+
+/**
+ * we_req_q_specific_pull - Wait completion and delete queue in the list.
+ *
+ * @data: Pointer to we_req_data to be deleteed in the list.
+ *
+ * Returns WE_FOUND_REQUEST if data is found in the list,
+ * WE_NOT_FOUND_REQUEST otherwise.
+ */
+int we_req_q_specific_pull(struct we_req_data *data)
+{
+ struct we_req_q *req;
+
+ req = we_req_q_search(data);
+ if (req != NULL) {
+ write_lock(&(we_q_head.lock));
+ complete_all(&(req->evt));
+ list_del(&req->queue);
+ write_unlock(&(we_q_head.lock));
+ return WE_FOUND_REQUEST;
+ }
+
+ return WE_NOTFOUND_REQUEST;
+}
+
+/**
+ * we_req_q_del - Delete queue in the list.
+ *
+ * @data: Pointer to we_req_data to be deleteed in the list.
+ *
+ * Returns WE_FOUND_REQUEST if data is found in the list,
+ * WE_NOT_FOUND_REQUEST otherwise.
+ */
+int we_req_q_del(struct we_req_data *data)
+{
+ struct we_req_q *req;
+
+ req = we_req_q_search(data);
+ if (req != NULL) {
+ write_lock(&(we_q_head.lock));
+ list_del(&req->queue);
+ write_unlock(&(we_q_head.lock));
+ return WE_FOUND_REQUEST;
+ }
+
+ return WE_NOTFOUND_REQUEST;
+}
+
+/**
+ * match_we_req_data - Compare two we_req_data data.
+ *
+ * @data1: Pointer to we_req_data
+ * @data2: Pointer to we_req_data
+ *
+ * Returns 1 if all members of both we_req_data data are equal,
+ * 0 otherwise.
+ */
+static int match_we_req_data(struct we_req_data *data1,
+ struct we_req_data *data2)
+{
+ if (strncmp(data1->shortname, data2->shortname, SHORTNAMELENGTH) == 0) {
+ if (data1->seq == data2->seq)
+ return 1;
+ }
+
+ return 0;
+}
+
+#endif /* CONFIG_SECURITY_WHITEEGRET_DRIVER */
diff --git a/security/whiteegret/request.h b/security/whiteegret/request.h
new file mode 100644
index 0000000..1ad9439
--- /dev/null
+++ b/security/whiteegret/request.h
@@ -0,0 +1,79 @@
+/*
+ * WhiteEgret Linux Security Module
+ *
+ * Copyright (C) 2017 Toshiba Corporation
+ */
+
+#ifndef _REQUEST_H
+#define _REQUEST_H
+
+#include <linux/sched.h>
+#include <linux/wait.h>
+
+#include "we.h"
+
+struct we_req_q_head {
+ struct list_head head;
+ rwlock_t lock;
+#ifdef CONFIG_SECURITY_WHITEEGRET_DRIVER
+ wait_queue_head_t waitq;
+#endif
+};
+
+#ifdef CONFIG_SECURITY_WHITEEGRET_DRIVER
+
+#define STOP_EXEC 0
+#define START_EXEC 1
+
+extern struct we_req_q_head we_q_head;
+
+/* Structure for information of request from kernel space to user space */
+struct we_req_data {
+ struct we_obj_info *we_obj_info;
+};
+
+struct we_req_q {
+ struct list_head queue;
+ int finish_flag;
+ struct we_req_data data;
+ int permit;
+ wait_queue_head_t waitq;
+};
+
+int we_req_q_pop(struct we_req_q *queue);
+int we_req_q_cleanup(void);
+
+#else /* CONFIG_SECURITY_WHITEEGRET_DRIVER */
+
+#include <linux/completion.h>
+
+/* Return values of searching queue of requests */
+enum {
+ WE_NOTFOUND_REQUEST,
+ WE_FOUND_REQUEST
+};
+
+/* Structure for information of request from kernel space to user space */
+struct we_req_data {
+ char shortname[SHORTNAMELENGTH]; /* file name */
+ u32 seq; /* sequence number */
+};
+
+/* Structure for queue of requests */
+struct we_req_q {
+ struct list_head queue;
+ struct completion evt;
+ struct we_req_data data;
+};
+
+int we_req_q_specific_pull(struct we_req_data *data);
+int we_req_q_del(struct we_req_data *data);
+
+#endif /* CONFIG_SECURITY_WHITEEGRET_DRIVER */
+
+int we_req_q_head_init(void);
+int we_req_q_init(struct we_req_q *req, struct we_obj_info *info);
+int we_req_q_push(struct we_req_q *queue);
+struct we_req_q *we_req_q_search(struct we_req_data *data);
+
+#endif /* _REQUEST_H */
diff --git a/security/whiteegret/returntoexec.h
b/security/whiteegret/returntoexec.h
new file mode 100644
index 0000000..7fae897
--- /dev/null
+++ b/security/whiteegret/returntoexec.h
@@ -0,0 +1,14 @@
+/*
+ * WhiteEgret Linux Security Module
+ *
+ * Copyright (C) 2017 Toshiba Corporation
+ */
+
+#ifndef _RETURNTOEXEC_H
+#define _RETURNTOEXEC_H
+
+#include "request.h"
+
+int returntoexec(int result_, struct we_req_data *reqdata_);
+
+#endif
diff --git a/security/whiteegret/we.h b/security/whiteegret/we.h
new file mode 100644
index 0000000..4a357e6
--- /dev/null
+++ b/security/whiteegret/we.h
@@ -0,0 +1,72 @@
+/*
+ * WhiteEgret Linux Security Module
+ *
+ * Copyright (C) 2017 Toshiba Corporation
+ */
+
+#ifndef _WE_H
+#define _WE_H
+
+#include <linux/binfmts.h>
+#include <linux/version.h>
+#include "we_common.h"
+
+/*
+ * Initial size in byte of memory allocation to store the path
+ * of an object file
+ */
+#define EXPECTPATHSIZE 1023
+
+/*
+ * Default size in byte to expand block that stores the path
+ * of an object file when the memory block is too small
+ * to store the path
+ */
+#define ADDEDEXPECTPATHSIZE 1023
+
+/* Maximum length in byte of path of object file */
+#define MAXPATHSIZE 8184
+
+/*
+ * Maximum number of retry for sending the same message
+ * to user whitelisting application
+ */
+#define MAXCOMRETRY 3
+
+/* Timeout value in millisecond to aquire the semaphore */
+#define WERESULTTIMEOUT 1000
+
+#ifndef CONFIG_SECURITY_WHITEEGRET_DRIVER
+
+/*
+ * Timeout value in jiffies to wait response from
+ * user whitelisting application
+ */
+#define WEGENNLTIMEOUT 1000
+
+#endif
+
+/*
+ * Structure for an object to be tested whether it is contained
+ * in the whitelist or not
+ */
+struct we_obj_info {
+ char shortname[SHORTNAMELENGTH]; /* short name for the object */
+#ifdef CONFIG_SECURITY_WHITEEGRET_DRIVER
+ int pathsize;
+#endif
+ char *path; /* full path to the object */
+ pid_t pid;
+#ifdef CONFIG_SECURITY_WHITEEGRET_DRIVER
+ pid_t ppid;
+#endif
+};
+
+int we_security_bprm_check_main(struct linux_binprm *bprm);
+int we_security_mmap_check_main(struct file *file,
+ unsigned long reqprot, unsigned long flags);
+
+int we_specific_init(void);
+int we_specific_exit(void);
+
+#endif /* _WE_H */
diff --git a/security/whiteegret/we_common.h b/security/whiteegret/we_common.h
new file mode 100644
index 0000000..1288562
--- /dev/null
+++ b/security/whiteegret/we_common.h
@@ -0,0 +1,19 @@
+/*
+ * WhiteEgret Linux Security Module
+ *
+ * Copyright (C) 2017 Toshiba Corporation
+ */
+
+#ifndef _WE_COMMON_H
+#define _WE_COMMON_H
+
+/*
+ * Maximum length in byte of authentication credentials
+ * of user's whitelisting application
+ */
+#define AUTHINFOLENGTH 0
+
+/* Maximum length in byte of name of executable file */
+#define SHORTNAMELENGTH 256
+
+#endif /* _WE_COMMON_H */
--
2.9.3
