[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/Kconfig b/ap/os/linux/linux-3.4.x/security/integrity/Kconfig
new file mode 100644
index 0000000..5bd1cc1
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/Kconfig
@@ -0,0 +1,21 @@
+#
+config INTEGRITY
+ def_bool y
+ depends on IMA || EVM
+
+config INTEGRITY_SIGNATURE
+ boolean "Digital signature verification using multiple keyrings"
+ depends on INTEGRITY && KEYS
+ default n
+ select SIGNATURE
+ help
+ This option enables digital signature verification support
+ using multiple keyrings. It defines separate keyrings for each
+ of the different use cases - evm, ima, and modules.
+ Different keyrings improves search performance, but also allow
+ to "lock" certain keyring to prevent adding new keys.
+ This is useful for evm and module keyrings, when keys are
+ usually only added from initramfs.
+
+source security/integrity/ima/Kconfig
+source security/integrity/evm/Kconfig
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/Makefile b/ap/os/linux/linux-3.4.x/security/integrity/Makefile
new file mode 100644
index 0000000..d43799c
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/Makefile
@@ -0,0 +1,13 @@
+#
+# Makefile for caching inode integrity data (iint)
+#
+
+obj-$(CONFIG_INTEGRITY) += integrity.o
+obj-$(CONFIG_INTEGRITY_SIGNATURE) += digsig.o
+
+integrity-y := iint.o
+
+subdir-$(CONFIG_IMA) += ima
+obj-$(CONFIG_IMA) += ima/built-in.o
+subdir-$(CONFIG_EVM) += evm
+obj-$(CONFIG_EVM) += evm/built-in.o
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/digsig.c b/ap/os/linux/linux-3.4.x/security/integrity/digsig.c
new file mode 100644
index 0000000..2dc167d
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/digsig.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2011 Intel Corporation
+ *
+ * Author:
+ * Dmitry Kasatkin <dmitry.kasatkin@intel.com>
+ *
+ * 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, version 2 of the License.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/err.h>
+#include <linux/rbtree.h>
+#include <linux/key-type.h>
+#include <linux/digsig.h>
+
+#include "integrity.h"
+
+static struct key *keyring[INTEGRITY_KEYRING_MAX];
+
+static const char *keyring_name[INTEGRITY_KEYRING_MAX] = {
+ "_evm",
+ "_module",
+ "_ima",
+};
+
+int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
+ const char *digest, int digestlen)
+{
+ if (id >= INTEGRITY_KEYRING_MAX)
+ return -EINVAL;
+
+ if (!keyring[id]) {
+ keyring[id] =
+ request_key(&key_type_keyring, keyring_name[id], NULL);
+ if (IS_ERR(keyring[id])) {
+ int err = PTR_ERR(keyring[id]);
+ pr_err("no %s keyring: %d\n", keyring_name[id], err);
+ keyring[id] = NULL;
+ return err;
+ }
+ }
+
+ return digsig_verify(keyring[id], sig, siglen, digest, digestlen);
+}
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/evm/Kconfig b/ap/os/linux/linux-3.4.x/security/integrity/evm/Kconfig
new file mode 100644
index 0000000..afbb59d
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/evm/Kconfig
@@ -0,0 +1,13 @@
+config EVM
+ boolean "EVM support"
+ depends on SECURITY && KEYS && (TRUSTED_KEYS=y || TRUSTED_KEYS=n)
+ select CRYPTO_HMAC
+ select CRYPTO_MD5
+ select CRYPTO_SHA1
+ select ENCRYPTED_KEYS
+ default n
+ help
+ EVM protects a file's security extended attributes against
+ integrity attacks.
+
+ If you are unsure how to answer this question, answer N.
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/evm/Makefile b/ap/os/linux/linux-3.4.x/security/integrity/evm/Makefile
new file mode 100644
index 0000000..7393c41
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/evm/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for building the Extended Verification Module(EVM)
+#
+obj-$(CONFIG_EVM) += evm.o
+
+evm-y := evm_main.o evm_crypto.o evm_secfs.o
+evm-$(CONFIG_FS_POSIX_ACL) += evm_posix_acl.o
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/evm/evm.h b/ap/os/linux/linux-3.4.x/security/integrity/evm/evm.h
new file mode 100644
index 0000000..c885247
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/evm/evm.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2005-2010 IBM Corporation
+ *
+ * Authors:
+ * Mimi Zohar <zohar@us.ibm.com>
+ * Kylene Hall <kjhall@us.ibm.com>
+ *
+ * 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, version 2 of the License.
+ *
+ * File: evm.h
+ *
+ */
+
+#ifndef __INTEGRITY_EVM_H
+#define __INTEGRITY_EVM_H
+
+#include <linux/xattr.h>
+#include <linux/security.h>
+
+#include "../integrity.h"
+
+extern int evm_initialized;
+extern char *evm_hmac;
+extern char *evm_hash;
+
+extern struct crypto_shash *hmac_tfm;
+extern struct crypto_shash *hash_tfm;
+
+/* List of EVM protected security xattrs */
+extern char *evm_config_xattrnames[];
+
+extern int evm_init_key(void);
+extern int evm_update_evmxattr(struct dentry *dentry,
+ const char *req_xattr_name,
+ const char *req_xattr_value,
+ size_t req_xattr_value_len);
+extern int evm_calc_hmac(struct dentry *dentry, const char *req_xattr_name,
+ const char *req_xattr_value,
+ size_t req_xattr_value_len, char *digest);
+extern int evm_calc_hash(struct dentry *dentry, const char *req_xattr_name,
+ const char *req_xattr_value,
+ size_t req_xattr_value_len, char *digest);
+extern int evm_init_hmac(struct inode *inode, const struct xattr *xattr,
+ char *hmac_val);
+extern int evm_init_secfs(void);
+extern void evm_cleanup_secfs(void);
+
+#endif
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/evm/evm_crypto.c b/ap/os/linux/linux-3.4.x/security/integrity/evm/evm_crypto.c
new file mode 100644
index 0000000..62fa2c5
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/evm/evm_crypto.c
@@ -0,0 +1,257 @@
+/*
+ * Copyright (C) 2005-2010 IBM Corporation
+ *
+ * Authors:
+ * Mimi Zohar <zohar@us.ibm.com>
+ * Kylene Hall <kjhall@us.ibm.com>
+ *
+ * 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, version 2 of the License.
+ *
+ * File: evm_crypto.c
+ * Using root's kernel master key (kmk), calculate the HMAC
+ */
+
+#include <linux/module.h>
+#include <linux/crypto.h>
+#include <linux/xattr.h>
+#include <keys/encrypted-type.h>
+#include <crypto/hash.h>
+#include "evm.h"
+
+#define EVMKEY "evm-key"
+#define MAX_KEY_SIZE 128
+static unsigned char evmkey[MAX_KEY_SIZE];
+static int evmkey_len = MAX_KEY_SIZE;
+
+struct crypto_shash *hmac_tfm;
+struct crypto_shash *hash_tfm;
+
+static DEFINE_MUTEX(mutex);
+
+static struct shash_desc *init_desc(char type)
+{
+ long rc;
+ char *algo;
+ struct crypto_shash **tfm;
+ struct shash_desc *desc;
+
+ if (type == EVM_XATTR_HMAC) {
+ tfm = &hmac_tfm;
+ algo = evm_hmac;
+ } else {
+ tfm = &hash_tfm;
+ algo = evm_hash;
+ }
+
+ if (*tfm == NULL) {
+ mutex_lock(&mutex);
+ if (*tfm)
+ goto out;
+ *tfm = crypto_alloc_shash(algo, 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(*tfm)) {
+ rc = PTR_ERR(*tfm);
+ pr_err("Can not allocate %s (reason: %ld)\n", algo, rc);
+ *tfm = NULL;
+ mutex_unlock(&mutex);
+ return ERR_PTR(rc);
+ }
+ if (type == EVM_XATTR_HMAC) {
+ rc = crypto_shash_setkey(*tfm, evmkey, evmkey_len);
+ if (rc) {
+ crypto_free_shash(*tfm);
+ *tfm = NULL;
+ mutex_unlock(&mutex);
+ return ERR_PTR(rc);
+ }
+ }
+out:
+ mutex_unlock(&mutex);
+ }
+
+ desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(*tfm),
+ GFP_KERNEL);
+ if (!desc)
+ return ERR_PTR(-ENOMEM);
+
+ desc->tfm = *tfm;
+ desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ rc = crypto_shash_init(desc);
+ if (rc) {
+ kfree(desc);
+ return ERR_PTR(rc);
+ }
+ return desc;
+}
+
+/* Protect against 'cutting & pasting' security.evm xattr, include inode
+ * specific info.
+ *
+ * (Additional directory/file metadata needs to be added for more complete
+ * protection.)
+ */
+static void hmac_add_misc(struct shash_desc *desc, struct inode *inode,
+ char *digest)
+{
+ struct h_misc {
+ unsigned long ino;
+ __u32 generation;
+ uid_t uid;
+ gid_t gid;
+ umode_t mode;
+ } hmac_misc;
+
+ memset(&hmac_misc, 0, sizeof hmac_misc);
+ hmac_misc.ino = inode->i_ino;
+ hmac_misc.generation = inode->i_generation;
+ hmac_misc.uid = inode->i_uid;
+ hmac_misc.gid = inode->i_gid;
+ hmac_misc.mode = inode->i_mode;
+ crypto_shash_update(desc, (const u8 *)&hmac_misc, sizeof hmac_misc);
+ crypto_shash_final(desc, digest);
+}
+
+/*
+ * Calculate the HMAC value across the set of protected security xattrs.
+ *
+ * Instead of retrieving the requested xattr, for performance, calculate
+ * the hmac using the requested xattr value. Don't alloc/free memory for
+ * each xattr, but attempt to re-use the previously allocated memory.
+ */
+static int evm_calc_hmac_or_hash(struct dentry *dentry,
+ const char *req_xattr_name,
+ const char *req_xattr_value,
+ size_t req_xattr_value_len,
+ char type, char *digest)
+{
+ struct inode *inode = dentry->d_inode;
+ struct shash_desc *desc;
+ char **xattrname;
+ size_t xattr_size = 0;
+ char *xattr_value = NULL;
+ int error;
+ int size;
+
+ if (!inode->i_op || !inode->i_op->getxattr)
+ return -EOPNOTSUPP;
+ desc = init_desc(type);
+ if (IS_ERR(desc))
+ return PTR_ERR(desc);
+
+ error = -ENODATA;
+ for (xattrname = evm_config_xattrnames; *xattrname != NULL; xattrname++) {
+ if ((req_xattr_name && req_xattr_value)
+ && !strcmp(*xattrname, req_xattr_name)) {
+ error = 0;
+ crypto_shash_update(desc, (const u8 *)req_xattr_value,
+ req_xattr_value_len);
+ continue;
+ }
+ size = vfs_getxattr_alloc(dentry, *xattrname,
+ &xattr_value, xattr_size, GFP_NOFS);
+ if (size == -ENOMEM) {
+ error = -ENOMEM;
+ goto out;
+ }
+ if (size < 0)
+ continue;
+
+ error = 0;
+ xattr_size = size;
+ crypto_shash_update(desc, (const u8 *)xattr_value, xattr_size);
+ }
+ hmac_add_misc(desc, inode, digest);
+
+out:
+ kfree(xattr_value);
+ kfree(desc);
+ return error;
+}
+
+int evm_calc_hmac(struct dentry *dentry, const char *req_xattr_name,
+ const char *req_xattr_value, size_t req_xattr_value_len,
+ char *digest)
+{
+ return evm_calc_hmac_or_hash(dentry, req_xattr_name, req_xattr_value,
+ req_xattr_value_len, EVM_XATTR_HMAC, digest);
+}
+
+int evm_calc_hash(struct dentry *dentry, const char *req_xattr_name,
+ const char *req_xattr_value, size_t req_xattr_value_len,
+ char *digest)
+{
+ return evm_calc_hmac_or_hash(dentry, req_xattr_name, req_xattr_value,
+ req_xattr_value_len, IMA_XATTR_DIGEST, digest);
+}
+
+/*
+ * Calculate the hmac and update security.evm xattr
+ *
+ * Expects to be called with i_mutex locked.
+ */
+int evm_update_evmxattr(struct dentry *dentry, const char *xattr_name,
+ const char *xattr_value, size_t xattr_value_len)
+{
+ struct inode *inode = dentry->d_inode;
+ struct evm_ima_xattr_data xattr_data;
+ int rc = 0;
+
+ rc = evm_calc_hmac(dentry, xattr_name, xattr_value,
+ xattr_value_len, xattr_data.digest);
+ if (rc == 0) {
+ xattr_data.type = EVM_XATTR_HMAC;
+ rc = __vfs_setxattr_noperm(dentry, XATTR_NAME_EVM,
+ &xattr_data,
+ sizeof(xattr_data), 0);
+ } else if (rc == -ENODATA && inode->i_op->removexattr) {
+ rc = inode->i_op->removexattr(dentry, XATTR_NAME_EVM);
+ }
+ return rc;
+}
+
+int evm_init_hmac(struct inode *inode, const struct xattr *lsm_xattr,
+ char *hmac_val)
+{
+ struct shash_desc *desc;
+
+ desc = init_desc(EVM_XATTR_HMAC);
+ if (IS_ERR(desc)) {
+ printk(KERN_INFO "init_desc failed\n");
+ return PTR_ERR(desc);
+ }
+
+ crypto_shash_update(desc, lsm_xattr->value, lsm_xattr->value_len);
+ hmac_add_misc(desc, inode, hmac_val);
+ kfree(desc);
+ return 0;
+}
+
+/*
+ * Get the key from the TPM for the SHA1-HMAC
+ */
+int evm_init_key(void)
+{
+ struct key *evm_key;
+ struct encrypted_key_payload *ekp;
+ int rc = 0;
+
+ evm_key = request_key(&key_type_encrypted, EVMKEY, NULL);
+ if (IS_ERR(evm_key))
+ return -ENOENT;
+
+ down_read(&evm_key->sem);
+ ekp = evm_key->payload.data;
+ if (ekp->decrypted_datalen > MAX_KEY_SIZE) {
+ rc = -EINVAL;
+ goto out;
+ }
+ memcpy(evmkey, ekp->decrypted_data, ekp->decrypted_datalen);
+out:
+ /* burn the original key contents */
+ memset(ekp->decrypted_data, 0, ekp->decrypted_datalen);
+ up_read(&evm_key->sem);
+ key_put(evm_key);
+ return rc;
+}
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/evm/evm_main.c b/ap/os/linux/linux-3.4.x/security/integrity/evm/evm_main.c
new file mode 100644
index 0000000..d96b7f6
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/evm/evm_main.c
@@ -0,0 +1,463 @@
+/*
+ * Copyright (C) 2005-2010 IBM Corporation
+ *
+ * Author:
+ * Mimi Zohar <zohar@us.ibm.com>
+ * Kylene Hall <kjhall@us.ibm.com>
+ *
+ * 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, version 2 of the License.
+ *
+ * File: evm_main.c
+ * implements evm_inode_setxattr, evm_inode_post_setxattr,
+ * evm_inode_removexattr, and evm_verifyxattr
+ */
+
+#include <linux/module.h>
+#include <linux/crypto.h>
+#include <linux/xattr.h>
+#include <linux/integrity.h>
+#include <linux/evm.h>
+#include <crypto/hash.h>
+#include "evm.h"
+
+int evm_initialized;
+
+char *evm_hmac = "hmac(sha1)";
+char *evm_hash = "sha1";
+
+char *evm_config_xattrnames[] = {
+#ifdef CONFIG_SECURITY_SELINUX
+ XATTR_NAME_SELINUX,
+#endif
+#ifdef CONFIG_SECURITY_SMACK
+ XATTR_NAME_SMACK,
+#endif
+ XATTR_NAME_CAPS,
+ NULL
+};
+
+static int evm_fixmode;
+static int __init evm_set_fixmode(char *str)
+{
+ if (strncmp(str, "fix", 3) == 0)
+ evm_fixmode = 1;
+ return 0;
+}
+__setup("evm=", evm_set_fixmode);
+
+static int evm_find_protected_xattrs(struct dentry *dentry)
+{
+ struct inode *inode = dentry->d_inode;
+ char **xattr;
+ int error;
+ int count = 0;
+
+ if (!inode->i_op || !inode->i_op->getxattr)
+ return -EOPNOTSUPP;
+
+ for (xattr = evm_config_xattrnames; *xattr != NULL; xattr++) {
+ error = inode->i_op->getxattr(dentry, *xattr, NULL, 0);
+ if (error < 0) {
+ if (error == -ENODATA)
+ continue;
+ return error;
+ }
+ count++;
+ }
+
+ return count;
+}
+
+/*
+ * evm_verify_hmac - calculate and compare the HMAC with the EVM xattr
+ *
+ * Compute the HMAC on the dentry's protected set of extended attributes
+ * and compare it against the stored security.evm xattr.
+ *
+ * For performance:
+ * - use the previoulsy retrieved xattr value and length to calculate the
+ * HMAC.)
+ * - cache the verification result in the iint, when available.
+ *
+ * Returns integrity status
+ */
+static enum integrity_status evm_verify_hmac(struct dentry *dentry,
+ const char *xattr_name,
+ char *xattr_value,
+ size_t xattr_value_len,
+ struct integrity_iint_cache *iint)
+{
+ struct evm_ima_xattr_data *xattr_data = NULL;
+ struct evm_ima_xattr_data calc;
+ enum integrity_status evm_status = INTEGRITY_PASS;
+ int rc, xattr_len;
+
+ if (iint && iint->evm_status == INTEGRITY_PASS)
+ return iint->evm_status;
+
+ /* if status is not PASS, try to check again - against -ENOMEM */
+
+ /* first need to know the sig type */
+ rc = vfs_getxattr_alloc(dentry, XATTR_NAME_EVM, (char **)&xattr_data, 0,
+ GFP_NOFS);
+ if (rc <= 0) {
+ if (rc == 0)
+ evm_status = INTEGRITY_FAIL; /* empty */
+ else if (rc == -ENODATA) {
+ rc = evm_find_protected_xattrs(dentry);
+ if (rc > 0)
+ evm_status = INTEGRITY_NOLABEL;
+ else if (rc == 0)
+ evm_status = INTEGRITY_NOXATTRS; /* new file */
+ }
+ goto out;
+ }
+
+ xattr_len = rc - 1;
+
+ /* check value type */
+ switch (xattr_data->type) {
+ case EVM_XATTR_HMAC:
+ rc = evm_calc_hmac(dentry, xattr_name, xattr_value,
+ xattr_value_len, calc.digest);
+ if (rc)
+ break;
+ rc = memcmp(xattr_data->digest, calc.digest,
+ sizeof(calc.digest));
+ if (rc)
+ rc = -EINVAL;
+ break;
+ case EVM_IMA_XATTR_DIGSIG:
+ rc = evm_calc_hash(dentry, xattr_name, xattr_value,
+ xattr_value_len, calc.digest);
+ if (rc)
+ break;
+ rc = integrity_digsig_verify(INTEGRITY_KEYRING_EVM,
+ xattr_data->digest, xattr_len,
+ calc.digest, sizeof(calc.digest));
+ if (!rc) {
+ /* we probably want to replace rsa with hmac here */
+ evm_update_evmxattr(dentry, xattr_name, xattr_value,
+ xattr_value_len);
+ }
+ break;
+ default:
+ rc = -EINVAL;
+ break;
+ }
+
+ if (rc)
+ evm_status = (rc == -ENODATA) ?
+ INTEGRITY_NOXATTRS : INTEGRITY_FAIL;
+out:
+ if (iint)
+ iint->evm_status = evm_status;
+ kfree(xattr_data);
+ return evm_status;
+}
+
+static int evm_protected_xattr(const char *req_xattr_name)
+{
+ char **xattrname;
+ int namelen;
+ int found = 0;
+
+ namelen = strlen(req_xattr_name);
+ for (xattrname = evm_config_xattrnames; *xattrname != NULL; xattrname++) {
+ if ((strlen(*xattrname) == namelen)
+ && (strncmp(req_xattr_name, *xattrname, namelen) == 0)) {
+ found = 1;
+ break;
+ }
+ if (strncmp(req_xattr_name,
+ *xattrname + XATTR_SECURITY_PREFIX_LEN,
+ strlen(req_xattr_name)) == 0) {
+ found = 1;
+ break;
+ }
+ }
+ return found;
+}
+
+/**
+ * evm_verifyxattr - verify the integrity of the requested xattr
+ * @dentry: object of the verify xattr
+ * @xattr_name: requested xattr
+ * @xattr_value: requested xattr value
+ * @xattr_value_len: requested xattr value length
+ *
+ * Calculate the HMAC for the given dentry and verify it against the stored
+ * security.evm xattr. For performance, use the xattr value and length
+ * previously retrieved to calculate the HMAC.
+ *
+ * Returns the xattr integrity status.
+ *
+ * This function requires the caller to lock the inode's i_mutex before it
+ * is executed.
+ */
+enum integrity_status evm_verifyxattr(struct dentry *dentry,
+ const char *xattr_name,
+ void *xattr_value, size_t xattr_value_len,
+ struct integrity_iint_cache *iint)
+{
+ if (!evm_initialized || !evm_protected_xattr(xattr_name))
+ return INTEGRITY_UNKNOWN;
+
+ if (!iint) {
+ iint = integrity_iint_find(dentry->d_inode);
+ if (!iint)
+ return INTEGRITY_UNKNOWN;
+ }
+ return evm_verify_hmac(dentry, xattr_name, xattr_value,
+ xattr_value_len, iint);
+}
+EXPORT_SYMBOL_GPL(evm_verifyxattr);
+
+/*
+ * evm_verify_current_integrity - verify the dentry's metadata integrity
+ * @dentry: pointer to the affected dentry
+ *
+ * Verify and return the dentry's metadata integrity. The exceptions are
+ * before EVM is initialized or in 'fix' mode.
+ */
+static enum integrity_status evm_verify_current_integrity(struct dentry *dentry)
+{
+ struct inode *inode = dentry->d_inode;
+
+ if (!evm_initialized || !S_ISREG(inode->i_mode) || evm_fixmode)
+ return 0;
+ return evm_verify_hmac(dentry, NULL, NULL, 0, NULL);
+}
+
+/*
+ * evm_protect_xattr - protect the EVM extended attribute
+ *
+ * Prevent security.evm from being modified or removed without the
+ * necessary permissions or when the existing value is invalid.
+ *
+ * The posix xattr acls are 'system' prefixed, which normally would not
+ * affect security.evm. An interesting side affect of writing posix xattr
+ * acls is their modifying of the i_mode, which is included in security.evm.
+ * For posix xattr acls only, permit security.evm, even if it currently
+ * doesn't exist, to be updated.
+ */
+static int evm_protect_xattr(struct dentry *dentry, const char *xattr_name,
+ const void *xattr_value, size_t xattr_value_len)
+{
+ enum integrity_status evm_status;
+
+ if (strcmp(xattr_name, XATTR_NAME_EVM) == 0) {
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ } else if (!evm_protected_xattr(xattr_name)) {
+ if (!posix_xattr_acl(xattr_name))
+ return 0;
+ evm_status = evm_verify_current_integrity(dentry);
+ if ((evm_status == INTEGRITY_PASS) ||
+ (evm_status == INTEGRITY_NOXATTRS))
+ return 0;
+ return -EPERM;
+ }
+ evm_status = evm_verify_current_integrity(dentry);
+ return evm_status == INTEGRITY_PASS ? 0 : -EPERM;
+}
+
+/**
+ * evm_inode_setxattr - protect the EVM extended attribute
+ * @dentry: pointer to the affected dentry
+ * @xattr_name: pointer to the affected extended attribute name
+ * @xattr_value: pointer to the new extended attribute value
+ * @xattr_value_len: pointer to the new extended attribute value length
+ *
+ * Before allowing the 'security.evm' protected xattr to be updated,
+ * verify the existing value is valid. As only the kernel should have
+ * access to the EVM encrypted key needed to calculate the HMAC, prevent
+ * userspace from writing HMAC value. Writing 'security.evm' requires
+ * requires CAP_SYS_ADMIN privileges.
+ */
+int evm_inode_setxattr(struct dentry *dentry, const char *xattr_name,
+ const void *xattr_value, size_t xattr_value_len)
+{
+ const struct evm_ima_xattr_data *xattr_data = xattr_value;
+
+ if (strcmp(xattr_name, XATTR_NAME_EVM) == 0) {
+ if (!xattr_value_len)
+ return -EINVAL;
+ if (xattr_data->type != EVM_IMA_XATTR_DIGSIG)
+ return -EPERM;
+ }
+ return evm_protect_xattr(dentry, xattr_name, xattr_value,
+ xattr_value_len);
+}
+
+/**
+ * evm_inode_removexattr - protect the EVM extended attribute
+ * @dentry: pointer to the affected dentry
+ * @xattr_name: pointer to the affected extended attribute name
+ *
+ * Removing 'security.evm' requires CAP_SYS_ADMIN privileges and that
+ * the current value is valid.
+ */
+int evm_inode_removexattr(struct dentry *dentry, const char *xattr_name)
+{
+ return evm_protect_xattr(dentry, xattr_name, NULL, 0);
+}
+
+/**
+ * evm_inode_post_setxattr - update 'security.evm' to reflect the changes
+ * @dentry: pointer to the affected dentry
+ * @xattr_name: pointer to the affected extended attribute name
+ * @xattr_value: pointer to the new extended attribute value
+ * @xattr_value_len: pointer to the new extended attribute value length
+ *
+ * Update the HMAC stored in 'security.evm' to reflect the change.
+ *
+ * No need to take the i_mutex lock here, as this function is called from
+ * __vfs_setxattr_noperm(). The caller of which has taken the inode's
+ * i_mutex lock.
+ */
+void evm_inode_post_setxattr(struct dentry *dentry, const char *xattr_name,
+ const void *xattr_value, size_t xattr_value_len)
+{
+ if (!evm_initialized || (!evm_protected_xattr(xattr_name)
+ && !posix_xattr_acl(xattr_name)))
+ return;
+
+ evm_update_evmxattr(dentry, xattr_name, xattr_value, xattr_value_len);
+ return;
+}
+
+/**
+ * evm_inode_post_removexattr - update 'security.evm' after removing the xattr
+ * @dentry: pointer to the affected dentry
+ * @xattr_name: pointer to the affected extended attribute name
+ *
+ * Update the HMAC stored in 'security.evm' to reflect removal of the xattr.
+ */
+void evm_inode_post_removexattr(struct dentry *dentry, const char *xattr_name)
+{
+ struct inode *inode = dentry->d_inode;
+
+ if (!evm_initialized || !evm_protected_xattr(xattr_name))
+ return;
+
+ mutex_lock(&inode->i_mutex);
+ evm_update_evmxattr(dentry, xattr_name, NULL, 0);
+ mutex_unlock(&inode->i_mutex);
+ return;
+}
+
+/**
+ * evm_inode_setattr - prevent updating an invalid EVM extended attribute
+ * @dentry: pointer to the affected dentry
+ */
+int evm_inode_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ unsigned int ia_valid = attr->ia_valid;
+ enum integrity_status evm_status;
+
+ if (!(ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID)))
+ return 0;
+ evm_status = evm_verify_current_integrity(dentry);
+ if ((evm_status == INTEGRITY_PASS) ||
+ (evm_status == INTEGRITY_NOXATTRS))
+ return 0;
+ return -EPERM;
+}
+
+/**
+ * evm_inode_post_setattr - update 'security.evm' after modifying metadata
+ * @dentry: pointer to the affected dentry
+ * @ia_valid: for the UID and GID status
+ *
+ * For now, update the HMAC stored in 'security.evm' to reflect UID/GID
+ * changes.
+ *
+ * This function is called from notify_change(), which expects the caller
+ * to lock the inode's i_mutex.
+ */
+void evm_inode_post_setattr(struct dentry *dentry, int ia_valid)
+{
+ if (!evm_initialized)
+ return;
+
+ if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID))
+ evm_update_evmxattr(dentry, NULL, NULL, 0);
+ return;
+}
+
+/*
+ * evm_inode_init_security - initializes security.evm
+ */
+int evm_inode_init_security(struct inode *inode,
+ const struct xattr *lsm_xattr,
+ struct xattr *evm_xattr)
+{
+ struct evm_ima_xattr_data *xattr_data;
+ int rc;
+
+ if (!evm_initialized || !evm_protected_xattr(lsm_xattr->name))
+ return 0;
+
+ xattr_data = kzalloc(sizeof(*xattr_data), GFP_NOFS);
+ if (!xattr_data)
+ return -ENOMEM;
+
+ xattr_data->type = EVM_XATTR_HMAC;
+ rc = evm_init_hmac(inode, lsm_xattr, xattr_data->digest);
+ if (rc < 0)
+ goto out;
+
+ evm_xattr->value = xattr_data;
+ evm_xattr->value_len = sizeof(*xattr_data);
+ evm_xattr->name = kstrdup(XATTR_EVM_SUFFIX, GFP_NOFS);
+ return 0;
+out:
+ kfree(xattr_data);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(evm_inode_init_security);
+
+static int __init init_evm(void)
+{
+ int error;
+
+ error = evm_init_secfs();
+ if (error < 0) {
+ printk(KERN_INFO "EVM: Error registering secfs\n");
+ goto err;
+ }
+
+ return 0;
+err:
+ return error;
+}
+
+static void __exit cleanup_evm(void)
+{
+ evm_cleanup_secfs();
+ if (hmac_tfm)
+ crypto_free_shash(hmac_tfm);
+ if (hash_tfm)
+ crypto_free_shash(hash_tfm);
+}
+
+/*
+ * evm_display_config - list the EVM protected security extended attributes
+ */
+static int __init evm_display_config(void)
+{
+ char **xattrname;
+
+ for (xattrname = evm_config_xattrnames; *xattrname != NULL; xattrname++)
+ printk(KERN_INFO "EVM: %s\n", *xattrname);
+ return 0;
+}
+
+pure_initcall(evm_display_config);
+late_initcall(init_evm);
+
+MODULE_DESCRIPTION("Extended Verification Module");
+MODULE_LICENSE("GPL");
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/evm/evm_posix_acl.c b/ap/os/linux/linux-3.4.x/security/integrity/evm/evm_posix_acl.c
new file mode 100644
index 0000000..b1753e9
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/evm/evm_posix_acl.c
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2011 IBM Corporation
+ *
+ * Author:
+ * Mimi Zohar <zohar@us.ibm.com>
+ *
+ * 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, version 2 of the License.
+ */
+
+#include <linux/module.h>
+#include <linux/xattr.h>
+
+int posix_xattr_acl(char *xattr)
+{
+ int xattr_len = strlen(xattr);
+
+ if ((strlen(XATTR_NAME_POSIX_ACL_ACCESS) == xattr_len)
+ && (strncmp(XATTR_NAME_POSIX_ACL_ACCESS, xattr, xattr_len) == 0))
+ return 1;
+ if ((strlen(XATTR_NAME_POSIX_ACL_DEFAULT) == xattr_len)
+ && (strncmp(XATTR_NAME_POSIX_ACL_DEFAULT, xattr, xattr_len) == 0))
+ return 1;
+ return 0;
+}
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/evm/evm_secfs.c b/ap/os/linux/linux-3.4.x/security/integrity/evm/evm_secfs.c
new file mode 100644
index 0000000..ac76299
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/evm/evm_secfs.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2010 IBM Corporation
+ *
+ * Authors:
+ * Mimi Zohar <zohar@us.ibm.com>
+ *
+ * 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, version 2 of the License.
+ *
+ * File: evm_secfs.c
+ * - Used to signal when key is on keyring
+ * - Get the key and enable EVM
+ */
+
+#include <linux/uaccess.h>
+#include <linux/module.h>
+#include "evm.h"
+
+static struct dentry *evm_init_tpm;
+
+/**
+ * evm_read_key - read() for <securityfs>/evm
+ *
+ * @filp: file pointer, not actually used
+ * @buf: where to put the result
+ * @count: maximum to send along
+ * @ppos: where to start
+ *
+ * Returns number of bytes read or error code, as appropriate
+ */
+static ssize_t evm_read_key(struct file *filp, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ char temp[80];
+ ssize_t rc;
+
+ if (*ppos != 0)
+ return 0;
+
+ sprintf(temp, "%d", evm_initialized);
+ rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
+
+ return rc;
+}
+
+/**
+ * evm_write_key - write() for <securityfs>/evm
+ * @file: file pointer, not actually used
+ * @buf: where to get the data from
+ * @count: bytes sent
+ * @ppos: where to start
+ *
+ * Used to signal that key is on the kernel key ring.
+ * - get the integrity hmac key from the kernel key ring
+ * - create list of hmac protected extended attributes
+ * Returns number of bytes written or error code, as appropriate
+ */
+static ssize_t evm_write_key(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ char temp[80];
+ int i, error;
+
+ if (!capable(CAP_SYS_ADMIN) || evm_initialized)
+ return -EPERM;
+
+ if (count >= sizeof(temp) || count == 0)
+ return -EINVAL;
+
+ if (copy_from_user(temp, buf, count) != 0)
+ return -EFAULT;
+
+ temp[count] = '\0';
+
+ if ((sscanf(temp, "%d", &i) != 1) || (i != 1))
+ return -EINVAL;
+
+ error = evm_init_key();
+ if (!error) {
+ evm_initialized = 1;
+ pr_info("EVM: initialized\n");
+ } else
+ pr_err("EVM: initialization failed\n");
+ return count;
+}
+
+static const struct file_operations evm_key_ops = {
+ .read = evm_read_key,
+ .write = evm_write_key,
+};
+
+int __init evm_init_secfs(void)
+{
+ int error = 0;
+
+ evm_init_tpm = securityfs_create_file("evm", S_IRUSR | S_IRGRP,
+ NULL, NULL, &evm_key_ops);
+ if (!evm_init_tpm || IS_ERR(evm_init_tpm))
+ error = -EFAULT;
+ return error;
+}
+
+void __exit evm_cleanup_secfs(void)
+{
+ if (evm_init_tpm)
+ securityfs_remove(evm_init_tpm);
+}
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/iint.c b/ap/os/linux/linux-3.4.x/security/integrity/iint.c
new file mode 100644
index 0000000..399641c
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/iint.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright (C) 2008 IBM Corporation
+ *
+ * Authors:
+ * Mimi Zohar <zohar@us.ibm.com>
+ *
+ * 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, version 2 of the
+ * License.
+ *
+ * File: integrity_iint.c
+ * - implements the integrity hooks: integrity_inode_alloc,
+ * integrity_inode_free
+ * - cache integrity information associated with an inode
+ * using a rbtree tree.
+ */
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/rbtree.h>
+#include "integrity.h"
+
+static struct rb_root integrity_iint_tree = RB_ROOT;
+static DEFINE_SPINLOCK(integrity_iint_lock);
+static struct kmem_cache *iint_cache __read_mostly;
+
+int iint_initialized;
+
+/*
+ * __integrity_iint_find - return the iint associated with an inode
+ */
+static struct integrity_iint_cache *__integrity_iint_find(struct inode *inode)
+{
+ struct integrity_iint_cache *iint;
+ struct rb_node *n = integrity_iint_tree.rb_node;
+
+ assert_spin_locked(&integrity_iint_lock);
+
+ while (n) {
+ iint = rb_entry(n, struct integrity_iint_cache, rb_node);
+
+ if (inode < iint->inode)
+ n = n->rb_left;
+ else if (inode > iint->inode)
+ n = n->rb_right;
+ else
+ break;
+ }
+ if (!n)
+ return NULL;
+
+ return iint;
+}
+
+/*
+ * integrity_iint_find - return the iint associated with an inode
+ */
+struct integrity_iint_cache *integrity_iint_find(struct inode *inode)
+{
+ struct integrity_iint_cache *iint;
+
+ if (!IS_IMA(inode))
+ return NULL;
+
+ spin_lock(&integrity_iint_lock);
+ iint = __integrity_iint_find(inode);
+ spin_unlock(&integrity_iint_lock);
+
+ return iint;
+}
+
+static void iint_free(struct integrity_iint_cache *iint)
+{
+ iint->version = 0;
+ iint->flags = 0UL;
+ iint->evm_status = INTEGRITY_UNKNOWN;
+ kmem_cache_free(iint_cache, iint);
+}
+
+/**
+ * integrity_inode_alloc - allocate an iint associated with an inode
+ * @inode: pointer to the inode
+ */
+int integrity_inode_alloc(struct inode *inode)
+{
+ struct rb_node **p;
+ struct rb_node *new_node, *parent = NULL;
+ struct integrity_iint_cache *new_iint, *test_iint;
+ int rc;
+
+ new_iint = kmem_cache_alloc(iint_cache, GFP_NOFS);
+ if (!new_iint)
+ return -ENOMEM;
+
+ new_iint->inode = inode;
+ new_node = &new_iint->rb_node;
+
+ mutex_lock(&inode->i_mutex); /* i_flags */
+ spin_lock(&integrity_iint_lock);
+
+ p = &integrity_iint_tree.rb_node;
+ while (*p) {
+ parent = *p;
+ test_iint = rb_entry(parent, struct integrity_iint_cache,
+ rb_node);
+ rc = -EEXIST;
+ if (inode < test_iint->inode)
+ p = &(*p)->rb_left;
+ else if (inode > test_iint->inode)
+ p = &(*p)->rb_right;
+ else
+ goto out_err;
+ }
+
+ inode->i_flags |= S_IMA;
+ rb_link_node(new_node, parent, p);
+ rb_insert_color(new_node, &integrity_iint_tree);
+
+ spin_unlock(&integrity_iint_lock);
+ mutex_unlock(&inode->i_mutex); /* i_flags */
+
+ return 0;
+out_err:
+ spin_unlock(&integrity_iint_lock);
+ mutex_unlock(&inode->i_mutex); /* i_flags */
+ iint_free(new_iint);
+
+ return rc;
+}
+
+/**
+ * integrity_inode_free - called on security_inode_free
+ * @inode: pointer to the inode
+ *
+ * Free the integrity information(iint) associated with an inode.
+ */
+void integrity_inode_free(struct inode *inode)
+{
+ struct integrity_iint_cache *iint;
+
+ if (!IS_IMA(inode))
+ return;
+
+ spin_lock(&integrity_iint_lock);
+ iint = __integrity_iint_find(inode);
+ rb_erase(&iint->rb_node, &integrity_iint_tree);
+ spin_unlock(&integrity_iint_lock);
+
+ iint_free(iint);
+}
+
+static void init_once(void *foo)
+{
+ struct integrity_iint_cache *iint = foo;
+
+ memset(iint, 0, sizeof *iint);
+ iint->version = 0;
+ iint->flags = 0UL;
+ mutex_init(&iint->mutex);
+ iint->evm_status = INTEGRITY_UNKNOWN;
+}
+
+static int __init integrity_iintcache_init(void)
+{
+ iint_cache =
+ kmem_cache_create("iint_cache", sizeof(struct integrity_iint_cache),
+ 0, SLAB_PANIC, init_once);
+ iint_initialized = 1;
+ return 0;
+}
+security_initcall(integrity_iintcache_init);
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/ima/Kconfig b/ap/os/linux/linux-3.4.x/security/integrity/ima/Kconfig
new file mode 100644
index 0000000..35664fe
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/ima/Kconfig
@@ -0,0 +1,56 @@
+# IBM Integrity Measurement Architecture
+#
+config IMA
+ bool "Integrity Measurement Architecture(IMA)"
+ depends on SECURITY
+ select INTEGRITY
+ select SECURITYFS
+ select CRYPTO
+ select CRYPTO_HMAC
+ select CRYPTO_MD5
+ select CRYPTO_SHA1
+ select TCG_TPM if HAS_IOMEM && !UML
+ select TCG_TIS if TCG_TPM && X86
+ help
+ The Trusted Computing Group(TCG) runtime Integrity
+ Measurement Architecture(IMA) maintains a list of hash
+ values of executables and other sensitive system files,
+ as they are read or executed. If an attacker manages
+ to change the contents of an important system file
+ being measured, we can tell.
+
+ If your system has a TPM chip, then IMA also maintains
+ an aggregate integrity value over this list inside the
+ TPM hardware, so that the TPM can prove to a third party
+ whether or not critical system files have been modified.
+ Read <http://www.usenix.org/events/sec04/tech/sailer.html>
+ to learn more about IMA.
+ If unsure, say N.
+
+config IMA_MEASURE_PCR_IDX
+ int
+ depends on IMA
+ range 8 14
+ default 10
+ help
+ IMA_MEASURE_PCR_IDX determines the TPM PCR register index
+ that IMA uses to maintain the integrity aggregate of the
+ measurement list. If unsure, use the default 10.
+
+config IMA_AUDIT
+ bool
+ depends on IMA
+ default y
+ help
+ This option adds a kernel parameter 'ima_audit', which
+ allows informational auditing messages to be enabled
+ at boot. If this option is selected, informational integrity
+ auditing messages can be enabled with 'ima_audit=1' on
+ the kernel command line.
+
+config IMA_LSM_RULES
+ bool
+ depends on IMA && AUDIT && (SECURITY_SELINUX || SECURITY_SMACK)
+ default y
+ help
+ Disabling this option will disregard LSM based policy rules.
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/ima/Makefile b/ap/os/linux/linux-3.4.x/security/integrity/ima/Makefile
new file mode 100644
index 0000000..5690c02
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/ima/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for building Trusted Computing Group's(TCG) runtime Integrity
+# Measurement Architecture(IMA).
+#
+
+obj-$(CONFIG_IMA) += ima.o
+
+ima-y := ima_fs.o ima_queue.o ima_init.o ima_main.o ima_crypto.o ima_api.o \
+ ima_policy.o ima_audit.o
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/ima/ima.h b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima.h
new file mode 100644
index 0000000..3ccf7ac
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima.h
@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2005,2006,2007,2008 IBM Corporation
+ *
+ * Authors:
+ * Reiner Sailer <sailer@watson.ibm.com>
+ * Mimi Zohar <zohar@us.ibm.com>
+ *
+ * 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, version 2 of the
+ * License.
+ *
+ * File: ima.h
+ * internal Integrity Measurement Architecture (IMA) definitions
+ */
+
+#ifndef __LINUX_IMA_H
+#define __LINUX_IMA_H
+
+#include <linux/types.h>
+#include <linux/crypto.h>
+#include <linux/security.h>
+#include <linux/hash.h>
+#include <linux/tpm.h>
+#include <linux/audit.h>
+
+#include "../integrity.h"
+
+enum ima_show_type { IMA_SHOW_BINARY, IMA_SHOW_ASCII };
+enum tpm_pcrs { TPM_PCR0 = 0, TPM_PCR8 = 8 };
+
+/* digest size for IMA, fits SHA1 or MD5 */
+#define IMA_DIGEST_SIZE SHA1_DIGEST_SIZE
+#define IMA_EVENT_NAME_LEN_MAX 255
+
+#define IMA_HASH_BITS 9
+#define IMA_MEASURE_HTABLE_SIZE (1 << IMA_HASH_BITS)
+
+/* set during initialization */
+extern int ima_initialized;
+extern int ima_used_chip;
+extern char *ima_hash;
+
+/* IMA inode template definition */
+struct ima_template_data {
+ u8 digest[IMA_DIGEST_SIZE]; /* sha1/md5 measurement hash */
+ char file_name[IMA_EVENT_NAME_LEN_MAX + 1]; /* name + \0 */
+};
+
+struct ima_template_entry {
+ u8 digest[IMA_DIGEST_SIZE]; /* sha1 or md5 measurement hash */
+ const char *template_name;
+ int template_len;
+ struct ima_template_data template;
+};
+
+struct ima_queue_entry {
+ struct hlist_node hnext; /* place in hash collision list */
+ struct list_head later; /* place in ima_measurements list */
+ struct ima_template_entry *entry;
+};
+extern struct list_head ima_measurements; /* list of all measurements */
+
+/* declarations */
+void integrity_audit_msg(int audit_msgno, struct inode *inode,
+ const unsigned char *fname, const char *op,
+ const char *cause, int result, int info);
+
+/* Internal IMA function definitions */
+int ima_init(void);
+void ima_cleanup(void);
+int ima_fs_init(void);
+void ima_fs_cleanup(void);
+int ima_inode_alloc(struct inode *inode);
+int ima_add_template_entry(struct ima_template_entry *entry, int violation,
+ const char *op, struct inode *inode);
+int ima_calc_hash(struct file *file, char *digest);
+int ima_calc_template_hash(int template_len, void *template, char *digest);
+int ima_calc_boot_aggregate(char *digest);
+void ima_add_violation(struct inode *inode, const unsigned char *filename,
+ const char *op, const char *cause);
+
+/*
+ * used to protect h_table and sha_table
+ */
+extern spinlock_t ima_queue_lock;
+
+struct ima_h_table {
+ atomic_long_t len; /* number of stored measurements in the list */
+ atomic_long_t violations;
+ struct hlist_head queue[IMA_MEASURE_HTABLE_SIZE];
+};
+extern struct ima_h_table ima_htable;
+
+static inline unsigned long ima_hash_key(u8 *digest)
+{
+ return hash_long(*digest, IMA_HASH_BITS);
+}
+
+/* LIM API function definitions */
+int ima_must_measure(struct inode *inode, int mask, int function);
+int ima_collect_measurement(struct integrity_iint_cache *iint,
+ struct file *file);
+void ima_store_measurement(struct integrity_iint_cache *iint, struct file *file,
+ const unsigned char *filename);
+int ima_store_template(struct ima_template_entry *entry, int violation,
+ struct inode *inode);
+void ima_template_show(struct seq_file *m, void *e, enum ima_show_type show);
+
+/* rbtree tree calls to lookup, insert, delete
+ * integrity data associated with an inode.
+ */
+struct integrity_iint_cache *integrity_iint_insert(struct inode *inode);
+struct integrity_iint_cache *integrity_iint_find(struct inode *inode);
+
+/* IMA policy related functions */
+enum ima_hooks { FILE_CHECK = 1, FILE_MMAP, BPRM_CHECK };
+
+int ima_match_policy(struct inode *inode, enum ima_hooks func, int mask);
+void ima_init_policy(void);
+void ima_update_policy(void);
+ssize_t ima_parse_add_rule(char *);
+void ima_delete_rules(void);
+
+/* LSM based policy rules require audit */
+#ifdef CONFIG_IMA_LSM_RULES
+
+#define security_filter_rule_init security_audit_rule_init
+#define security_filter_rule_match security_audit_rule_match
+
+#else
+
+static inline int security_filter_rule_init(u32 field, u32 op, char *rulestr,
+ void **lsmrule)
+{
+ return -EINVAL;
+}
+
+static inline int security_filter_rule_match(u32 secid, u32 field, u32 op,
+ void *lsmrule,
+ struct audit_context *actx)
+{
+ return -EINVAL;
+}
+#endif /* CONFIG_IMA_LSM_RULES */
+#endif
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_api.c b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_api.c
new file mode 100644
index 0000000..88a2788
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_api.c
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2008 IBM Corporation
+ *
+ * Author: Mimi Zohar <zohar@us.ibm.com>
+ *
+ * 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, version 2 of the
+ * License.
+ *
+ * File: ima_api.c
+ * Implements must_measure, collect_measurement, store_measurement,
+ * and store_template.
+ */
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include "ima.h"
+static const char *IMA_TEMPLATE_NAME = "ima";
+
+/*
+ * ima_store_template - store ima template measurements
+ *
+ * Calculate the hash of a template entry, add the template entry
+ * to an ordered list of measurement entries maintained inside the kernel,
+ * and also update the aggregate integrity value (maintained inside the
+ * configured TPM PCR) over the hashes of the current list of measurement
+ * entries.
+ *
+ * Applications retrieve the current kernel-held measurement list through
+ * the securityfs entries in /sys/kernel/security/ima. The signed aggregate
+ * TPM PCR (called quote) can be retrieved using a TPM user space library
+ * and is used to validate the measurement list.
+ *
+ * Returns 0 on success, error code otherwise
+ */
+int ima_store_template(struct ima_template_entry *entry,
+ int violation, struct inode *inode)
+{
+ const char *op = "add_template_measure";
+ const char *audit_cause = "hashing_error";
+ int result;
+
+ memset(entry->digest, 0, sizeof(entry->digest));
+ entry->template_name = IMA_TEMPLATE_NAME;
+ entry->template_len = sizeof(entry->template);
+
+ if (!violation) {
+ result = ima_calc_template_hash(entry->template_len,
+ &entry->template,
+ entry->digest);
+ if (result < 0) {
+ integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode,
+ entry->template_name, op,
+ audit_cause, result, 0);
+ return result;
+ }
+ }
+ result = ima_add_template_entry(entry, violation, op, inode);
+ return result;
+}
+
+/*
+ * ima_add_violation - add violation to measurement list.
+ *
+ * Violations are flagged in the measurement list with zero hash values.
+ * By extending the PCR with 0xFF's instead of with zeroes, the PCR
+ * value is invalidated.
+ */
+void ima_add_violation(struct inode *inode, const unsigned char *filename,
+ const char *op, const char *cause)
+{
+ struct ima_template_entry *entry;
+ int violation = 1;
+ int result;
+
+ /* can overflow, only indicator */
+ atomic_long_inc(&ima_htable.violations);
+
+ entry = kmalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry) {
+ result = -ENOMEM;
+ goto err_out;
+ }
+ memset(&entry->template, 0, sizeof(entry->template));
+ strncpy(entry->template.file_name, filename, IMA_EVENT_NAME_LEN_MAX);
+ result = ima_store_template(entry, violation, inode);
+ if (result < 0)
+ kfree(entry);
+err_out:
+ integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode, filename,
+ op, cause, result, 0);
+}
+
+/**
+ * ima_must_measure - measure decision based on policy.
+ * @inode: pointer to inode to measure
+ * @mask: contains the permission mask (MAY_READ, MAY_WRITE, MAY_EXECUTE)
+ * @function: calling function (FILE_CHECK, BPRM_CHECK, FILE_MMAP)
+ *
+ * The policy is defined in terms of keypairs:
+ * subj=, obj=, type=, func=, mask=, fsmagic=
+ * subj,obj, and type: are LSM specific.
+ * func: FILE_CHECK | BPRM_CHECK | FILE_MMAP
+ * mask: contains the permission mask
+ * fsmagic: hex value
+ *
+ * Return 0 to measure. For matching a DONT_MEASURE policy, no policy,
+ * or other error, return an error code.
+*/
+int ima_must_measure(struct inode *inode, int mask, int function)
+{
+ int must_measure;
+
+ must_measure = ima_match_policy(inode, function, mask);
+ return must_measure ? 0 : -EACCES;
+}
+
+/*
+ * ima_collect_measurement - collect file measurement
+ *
+ * Calculate the file hash, if it doesn't already exist,
+ * storing the measurement and i_version in the iint.
+ *
+ * Must be called with iint->mutex held.
+ *
+ * Return 0 on success, error code otherwise
+ */
+int ima_collect_measurement(struct integrity_iint_cache *iint,
+ struct file *file)
+{
+ int result = -EEXIST;
+
+ if (!(iint->flags & IMA_MEASURED)) {
+ u64 i_version = file->f_dentry->d_inode->i_version;
+
+ memset(iint->digest, 0, IMA_DIGEST_SIZE);
+ result = ima_calc_hash(file, iint->digest);
+ if (!result)
+ iint->version = i_version;
+ }
+ return result;
+}
+
+/*
+ * ima_store_measurement - store file measurement
+ *
+ * Create an "ima" template and then store the template by calling
+ * ima_store_template.
+ *
+ * We only get here if the inode has not already been measured,
+ * but the measurement could already exist:
+ * - multiple copies of the same file on either the same or
+ * different filesystems.
+ * - the inode was previously flushed as well as the iint info,
+ * containing the hashing info.
+ *
+ * Must be called with iint->mutex held.
+ */
+void ima_store_measurement(struct integrity_iint_cache *iint,
+ struct file *file, const unsigned char *filename)
+{
+ const char *op = "add_template_measure";
+ const char *audit_cause = "ENOMEM";
+ int result = -ENOMEM;
+ struct inode *inode = file->f_dentry->d_inode;
+ struct ima_template_entry *entry;
+ int violation = 0;
+
+ entry = kmalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry) {
+ integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode, filename,
+ op, audit_cause, result, 0);
+ return;
+ }
+ memset(&entry->template, 0, sizeof(entry->template));
+ memcpy(entry->template.digest, iint->digest, IMA_DIGEST_SIZE);
+ strncpy(entry->template.file_name, filename, IMA_EVENT_NAME_LEN_MAX);
+
+ result = ima_store_template(entry, violation, inode);
+ if (!result || result == -EEXIST)
+ iint->flags |= IMA_MEASURED;
+ if (result < 0)
+ kfree(entry);
+}
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_audit.c b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_audit.c
new file mode 100644
index 0000000..21e96bf
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_audit.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2008 IBM Corporation
+ * Author: Mimi Zohar <zohar@us.ibm.com>
+ *
+ * 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, version 2 of the License.
+ *
+ * File: integrity_audit.c
+ * Audit calls for the integrity subsystem
+ */
+
+#include <linux/fs.h>
+#include <linux/gfp.h>
+#include <linux/audit.h>
+#include "ima.h"
+
+static int ima_audit;
+
+#ifdef CONFIG_IMA_AUDIT
+
+/* ima_audit_setup - enable informational auditing messages */
+static int __init ima_audit_setup(char *str)
+{
+ unsigned long audit;
+
+ if (!strict_strtoul(str, 0, &audit))
+ ima_audit = audit ? 1 : 0;
+ return 1;
+}
+__setup("ima_audit=", ima_audit_setup);
+#endif
+
+void integrity_audit_msg(int audit_msgno, struct inode *inode,
+ const unsigned char *fname, const char *op,
+ const char *cause, int result, int audit_info)
+{
+ struct audit_buffer *ab;
+
+ if (!ima_audit && audit_info == 1) /* Skip informational messages */
+ return;
+
+ ab = audit_log_start(current->audit_context, GFP_KERNEL, audit_msgno);
+ audit_log_format(ab, "pid=%d uid=%u auid=%u ses=%u",
+ current->pid, current_cred()->uid,
+ audit_get_loginuid(current),
+ audit_get_sessionid(current));
+ audit_log_task_context(ab);
+ audit_log_format(ab, " op=");
+ audit_log_string(ab, op);
+ audit_log_format(ab, " cause=");
+ audit_log_string(ab, cause);
+ audit_log_format(ab, " comm=");
+ audit_log_untrustedstring(ab, current->comm);
+ if (fname) {
+ audit_log_format(ab, " name=");
+ audit_log_untrustedstring(ab, fname);
+ }
+ if (inode) {
+ audit_log_format(ab, " dev=");
+ audit_log_untrustedstring(ab, inode->i_sb->s_id);
+ audit_log_format(ab, " ino=%lu", inode->i_ino);
+ }
+ audit_log_format(ab, " res=%d", !result);
+ audit_log_end(ab);
+}
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_crypto.c b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_crypto.c
new file mode 100644
index 0000000..9b3ade7
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_crypto.c
@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2005,2006,2007,2008 IBM Corporation
+ *
+ * Authors:
+ * Mimi Zohar <zohar@us.ibm.com>
+ * Kylene Hall <kjhall@us.ibm.com>
+ *
+ * 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, version 2 of the License.
+ *
+ * File: ima_crypto.c
+ * Calculates md5/sha1 file hash, template hash, boot-aggreate hash
+ */
+
+#include <linux/kernel.h>
+#include <linux/file.h>
+#include <linux/crypto.h>
+#include <linux/scatterlist.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include "ima.h"
+
+static int init_desc(struct hash_desc *desc)
+{
+ int rc;
+
+ desc->tfm = crypto_alloc_hash(ima_hash, 0, CRYPTO_ALG_ASYNC);
+ if (IS_ERR(desc->tfm)) {
+ pr_info("IMA: failed to load %s transform: %ld\n",
+ ima_hash, PTR_ERR(desc->tfm));
+ rc = PTR_ERR(desc->tfm);
+ return rc;
+ }
+ desc->flags = 0;
+ rc = crypto_hash_init(desc);
+ if (rc)
+ crypto_free_hash(desc->tfm);
+ return rc;
+}
+
+/*
+ * Calculate the MD5/SHA1 file digest
+ */
+int ima_calc_hash(struct file *file, char *digest)
+{
+ struct hash_desc desc;
+ struct scatterlist sg[1];
+ loff_t i_size, offset = 0;
+ char *rbuf;
+ int rc;
+
+ rc = init_desc(&desc);
+ if (rc != 0)
+ return rc;
+
+ rbuf = kzalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!rbuf) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ i_size = i_size_read(file->f_dentry->d_inode);
+ while (offset < i_size) {
+ int rbuf_len;
+
+ rbuf_len = kernel_read(file, offset, rbuf, PAGE_SIZE);
+ if (rbuf_len < 0) {
+ rc = rbuf_len;
+ break;
+ }
+ if (rbuf_len == 0)
+ break;
+ offset += rbuf_len;
+ sg_init_one(sg, rbuf, rbuf_len);
+
+ rc = crypto_hash_update(&desc, sg, rbuf_len);
+ if (rc)
+ break;
+ }
+ kfree(rbuf);
+ if (!rc)
+ rc = crypto_hash_final(&desc, digest);
+out:
+ crypto_free_hash(desc.tfm);
+ return rc;
+}
+
+/*
+ * Calculate the hash of a given template
+ */
+int ima_calc_template_hash(int template_len, void *template, char *digest)
+{
+ struct hash_desc desc;
+ struct scatterlist sg[1];
+ int rc;
+
+ rc = init_desc(&desc);
+ if (rc != 0)
+ return rc;
+
+ sg_init_one(sg, template, template_len);
+ rc = crypto_hash_update(&desc, sg, template_len);
+ if (!rc)
+ rc = crypto_hash_final(&desc, digest);
+ crypto_free_hash(desc.tfm);
+ return rc;
+}
+
+static void __init ima_pcrread(int idx, u8 *pcr)
+{
+ if (!ima_used_chip)
+ return;
+
+ if (tpm_pcr_read(TPM_ANY_NUM, idx, pcr) != 0)
+ pr_err("IMA: Error Communicating to TPM chip\n");
+}
+
+/*
+ * Calculate the boot aggregate hash
+ */
+int __init ima_calc_boot_aggregate(char *digest)
+{
+ struct hash_desc desc;
+ struct scatterlist sg;
+ u8 pcr_i[IMA_DIGEST_SIZE];
+ int rc, i;
+
+ rc = init_desc(&desc);
+ if (rc != 0)
+ return rc;
+
+ /* cumulative sha1 over tpm registers 0-7 */
+ for (i = TPM_PCR0; i < TPM_PCR8; i++) {
+ ima_pcrread(i, pcr_i);
+ /* now accumulate with current aggregate */
+ sg_init_one(&sg, pcr_i, IMA_DIGEST_SIZE);
+ rc = crypto_hash_update(&desc, &sg, IMA_DIGEST_SIZE);
+ }
+ if (!rc)
+ crypto_hash_final(&desc, digest);
+ crypto_free_hash(desc.tfm);
+ return rc;
+}
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_fs.c b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_fs.c
new file mode 100644
index 0000000..e1aa2b4
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_fs.c
@@ -0,0 +1,386 @@
+/*
+ * Copyright (C) 2005,2006,2007,2008 IBM Corporation
+ *
+ * Authors:
+ * Kylene Hall <kjhall@us.ibm.com>
+ * Reiner Sailer <sailer@us.ibm.com>
+ * Mimi Zohar <zohar@us.ibm.com>
+ *
+ * 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, version 2 of the
+ * License.
+ *
+ * File: ima_fs.c
+ * implemenents security file system for reporting
+ * current measurement list and IMA statistics
+ */
+#include <linux/fcntl.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/seq_file.h>
+#include <linux/rculist.h>
+#include <linux/rcupdate.h>
+#include <linux/parser.h>
+
+#include "ima.h"
+
+static int valid_policy = 1;
+#define TMPBUFLEN 12
+static ssize_t ima_show_htable_value(char __user *buf, size_t count,
+ loff_t *ppos, atomic_long_t *val)
+{
+ char tmpbuf[TMPBUFLEN];
+ ssize_t len;
+
+ len = scnprintf(tmpbuf, TMPBUFLEN, "%li\n", atomic_long_read(val));
+ return simple_read_from_buffer(buf, count, ppos, tmpbuf, len);
+}
+
+static ssize_t ima_show_htable_violations(struct file *filp,
+ char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return ima_show_htable_value(buf, count, ppos, &ima_htable.violations);
+}
+
+static const struct file_operations ima_htable_violations_ops = {
+ .read = ima_show_htable_violations,
+ .llseek = generic_file_llseek,
+};
+
+static ssize_t ima_show_measurements_count(struct file *filp,
+ char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return ima_show_htable_value(buf, count, ppos, &ima_htable.len);
+
+}
+
+static const struct file_operations ima_measurements_count_ops = {
+ .read = ima_show_measurements_count,
+ .llseek = generic_file_llseek,
+};
+
+/* returns pointer to hlist_node */
+static void *ima_measurements_start(struct seq_file *m, loff_t *pos)
+{
+ loff_t l = *pos;
+ struct ima_queue_entry *qe;
+
+ /* we need a lock since pos could point beyond last element */
+ rcu_read_lock();
+ list_for_each_entry_rcu(qe, &ima_measurements, later) {
+ if (!l--) {
+ rcu_read_unlock();
+ return qe;
+ }
+ }
+ rcu_read_unlock();
+ return NULL;
+}
+
+static void *ima_measurements_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ struct ima_queue_entry *qe = v;
+
+ /* lock protects when reading beyond last element
+ * against concurrent list-extension
+ */
+ rcu_read_lock();
+ qe = list_entry_rcu(qe->later.next,
+ struct ima_queue_entry, later);
+ rcu_read_unlock();
+ (*pos)++;
+
+ return (&qe->later == &ima_measurements) ? NULL : qe;
+}
+
+static void ima_measurements_stop(struct seq_file *m, void *v)
+{
+}
+
+static void ima_putc(struct seq_file *m, void *data, int datalen)
+{
+ while (datalen--)
+ seq_putc(m, *(char *)data++);
+}
+
+/* print format:
+ * 32bit-le=pcr#
+ * char[20]=template digest
+ * 32bit-le=template name size
+ * char[n]=template name
+ * eventdata[n]=template specific data
+ */
+static int ima_measurements_show(struct seq_file *m, void *v)
+{
+ /* the list never shrinks, so we don't need a lock here */
+ struct ima_queue_entry *qe = v;
+ struct ima_template_entry *e;
+ int namelen;
+ u32 pcr = CONFIG_IMA_MEASURE_PCR_IDX;
+
+ /* get entry */
+ e = qe->entry;
+ if (e == NULL)
+ return -1;
+
+ /*
+ * 1st: PCRIndex
+ * PCR used is always the same (config option) in
+ * little-endian format
+ */
+ ima_putc(m, &pcr, sizeof pcr);
+
+ /* 2nd: template digest */
+ ima_putc(m, e->digest, IMA_DIGEST_SIZE);
+
+ /* 3rd: template name size */
+ namelen = strlen(e->template_name);
+ ima_putc(m, &namelen, sizeof namelen);
+
+ /* 4th: template name */
+ ima_putc(m, (void *)e->template_name, namelen);
+
+ /* 5th: template specific data */
+ ima_template_show(m, (struct ima_template_data *)&e->template,
+ IMA_SHOW_BINARY);
+ return 0;
+}
+
+static const struct seq_operations ima_measurments_seqops = {
+ .start = ima_measurements_start,
+ .next = ima_measurements_next,
+ .stop = ima_measurements_stop,
+ .show = ima_measurements_show
+};
+
+static int ima_measurements_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &ima_measurments_seqops);
+}
+
+static const struct file_operations ima_measurements_ops = {
+ .open = ima_measurements_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static void ima_print_digest(struct seq_file *m, u8 *digest)
+{
+ int i;
+
+ for (i = 0; i < IMA_DIGEST_SIZE; i++)
+ seq_printf(m, "%02x", *(digest + i));
+}
+
+void ima_template_show(struct seq_file *m, void *e, enum ima_show_type show)
+{
+ struct ima_template_data *entry = e;
+ int namelen;
+
+ switch (show) {
+ case IMA_SHOW_ASCII:
+ ima_print_digest(m, entry->digest);
+ seq_printf(m, " %s\n", entry->file_name);
+ break;
+ case IMA_SHOW_BINARY:
+ ima_putc(m, entry->digest, IMA_DIGEST_SIZE);
+
+ namelen = strlen(entry->file_name);
+ ima_putc(m, &namelen, sizeof namelen);
+ ima_putc(m, entry->file_name, namelen);
+ default:
+ break;
+ }
+}
+
+/* print in ascii */
+static int ima_ascii_measurements_show(struct seq_file *m, void *v)
+{
+ /* the list never shrinks, so we don't need a lock here */
+ struct ima_queue_entry *qe = v;
+ struct ima_template_entry *e;
+
+ /* get entry */
+ e = qe->entry;
+ if (e == NULL)
+ return -1;
+
+ /* 1st: PCR used (config option) */
+ seq_printf(m, "%2d ", CONFIG_IMA_MEASURE_PCR_IDX);
+
+ /* 2nd: SHA1 template hash */
+ ima_print_digest(m, e->digest);
+
+ /* 3th: template name */
+ seq_printf(m, " %s ", e->template_name);
+
+ /* 4th: template specific data */
+ ima_template_show(m, (struct ima_template_data *)&e->template,
+ IMA_SHOW_ASCII);
+ return 0;
+}
+
+static const struct seq_operations ima_ascii_measurements_seqops = {
+ .start = ima_measurements_start,
+ .next = ima_measurements_next,
+ .stop = ima_measurements_stop,
+ .show = ima_ascii_measurements_show
+};
+
+static int ima_ascii_measurements_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &ima_ascii_measurements_seqops);
+}
+
+static const struct file_operations ima_ascii_measurements_ops = {
+ .open = ima_ascii_measurements_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static ssize_t ima_write_policy(struct file *file, const char __user *buf,
+ size_t datalen, loff_t *ppos)
+{
+ char *data = NULL;
+ ssize_t result;
+
+ if (datalen >= PAGE_SIZE)
+ datalen = PAGE_SIZE - 1;
+
+ /* No partial writes. */
+ result = -EINVAL;
+ if (*ppos != 0)
+ goto out;
+
+ result = -ENOMEM;
+ data = kmalloc(datalen + 1, GFP_KERNEL);
+ if (!data)
+ goto out;
+
+ *(data + datalen) = '\0';
+
+ result = -EFAULT;
+ if (copy_from_user(data, buf, datalen))
+ goto out;
+
+ result = ima_parse_add_rule(data);
+out:
+ if (result < 0)
+ valid_policy = 0;
+ kfree(data);
+ return result;
+}
+
+static struct dentry *ima_dir;
+static struct dentry *binary_runtime_measurements;
+static struct dentry *ascii_runtime_measurements;
+static struct dentry *runtime_measurements_count;
+static struct dentry *violations;
+static struct dentry *ima_policy;
+
+static atomic_t policy_opencount = ATOMIC_INIT(1);
+/*
+ * ima_open_policy: sequentialize access to the policy file
+ */
+static int ima_open_policy(struct inode * inode, struct file * filp)
+{
+ /* No point in being allowed to open it if you aren't going to write */
+ if (!(filp->f_flags & O_WRONLY))
+ return -EACCES;
+ if (atomic_dec_and_test(&policy_opencount))
+ return 0;
+ return -EBUSY;
+}
+
+/*
+ * ima_release_policy - start using the new measure policy rules.
+ *
+ * Initially, ima_measure points to the default policy rules, now
+ * point to the new policy rules, and remove the securityfs policy file,
+ * assuming a valid policy.
+ */
+static int ima_release_policy(struct inode *inode, struct file *file)
+{
+ if (!valid_policy) {
+ ima_delete_rules();
+ valid_policy = 1;
+ atomic_set(&policy_opencount, 1);
+ return 0;
+ }
+ ima_update_policy();
+ securityfs_remove(ima_policy);
+ ima_policy = NULL;
+ return 0;
+}
+
+static const struct file_operations ima_measure_policy_ops = {
+ .open = ima_open_policy,
+ .write = ima_write_policy,
+ .release = ima_release_policy,
+ .llseek = generic_file_llseek,
+};
+
+int __init ima_fs_init(void)
+{
+ ima_dir = securityfs_create_dir("ima", NULL);
+ if (IS_ERR(ima_dir))
+ return -1;
+
+ binary_runtime_measurements =
+ securityfs_create_file("binary_runtime_measurements",
+ S_IRUSR | S_IRGRP, ima_dir, NULL,
+ &ima_measurements_ops);
+ if (IS_ERR(binary_runtime_measurements))
+ goto out;
+
+ ascii_runtime_measurements =
+ securityfs_create_file("ascii_runtime_measurements",
+ S_IRUSR | S_IRGRP, ima_dir, NULL,
+ &ima_ascii_measurements_ops);
+ if (IS_ERR(ascii_runtime_measurements))
+ goto out;
+
+ runtime_measurements_count =
+ securityfs_create_file("runtime_measurements_count",
+ S_IRUSR | S_IRGRP, ima_dir, NULL,
+ &ima_measurements_count_ops);
+ if (IS_ERR(runtime_measurements_count))
+ goto out;
+
+ violations =
+ securityfs_create_file("violations", S_IRUSR | S_IRGRP,
+ ima_dir, NULL, &ima_htable_violations_ops);
+ if (IS_ERR(violations))
+ goto out;
+
+ ima_policy = securityfs_create_file("policy",
+ S_IWUSR,
+ ima_dir, NULL,
+ &ima_measure_policy_ops);
+ if (IS_ERR(ima_policy))
+ goto out;
+
+ return 0;
+out:
+ securityfs_remove(runtime_measurements_count);
+ securityfs_remove(ascii_runtime_measurements);
+ securityfs_remove(binary_runtime_measurements);
+ securityfs_remove(ima_dir);
+ securityfs_remove(ima_policy);
+ return -1;
+}
+
+void __exit ima_fs_cleanup(void)
+{
+ securityfs_remove(violations);
+ securityfs_remove(runtime_measurements_count);
+ securityfs_remove(ascii_runtime_measurements);
+ securityfs_remove(binary_runtime_measurements);
+ securityfs_remove(ima_dir);
+ securityfs_remove(ima_policy);
+}
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_init.c b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_init.c
new file mode 100644
index 0000000..17f1f06
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_init.c
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2005,2006,2007,2008 IBM Corporation
+ *
+ * Authors:
+ * Reiner Sailer <sailer@watson.ibm.com>
+ * Leendert van Doorn <leendert@watson.ibm.com>
+ * Mimi Zohar <zohar@us.ibm.com>
+ *
+ * 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, version 2 of the
+ * License.
+ *
+ * File: ima_init.c
+ * initialization and cleanup functions
+ */
+#include <linux/module.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include "ima.h"
+
+/* name for boot aggregate entry */
+static const char *boot_aggregate_name = "boot_aggregate";
+int ima_used_chip;
+
+/* Add the boot aggregate to the IMA measurement list and extend
+ * the PCR register.
+ *
+ * Calculate the boot aggregate, a SHA1 over tpm registers 0-7,
+ * assuming a TPM chip exists, and zeroes if the TPM chip does not
+ * exist. Add the boot aggregate measurement to the measurement
+ * list and extend the PCR register.
+ *
+ * If a tpm chip does not exist, indicate the core root of trust is
+ * not hardware based by invalidating the aggregate PCR value.
+ * (The aggregate PCR value is invalidated by adding one value to
+ * the measurement list and extending the aggregate PCR value with
+ * a different value.) Violations add a zero entry to the measurement
+ * list and extend the aggregate PCR value with ff...ff's.
+ */
+static void __init ima_add_boot_aggregate(void)
+{
+ struct ima_template_entry *entry;
+ const char *op = "add_boot_aggregate";
+ const char *audit_cause = "ENOMEM";
+ int result = -ENOMEM;
+ int violation = 1;
+
+ entry = kmalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry)
+ goto err_out;
+
+ memset(&entry->template, 0, sizeof(entry->template));
+ strncpy(entry->template.file_name, boot_aggregate_name,
+ IMA_EVENT_NAME_LEN_MAX);
+ if (ima_used_chip) {
+ violation = 0;
+ result = ima_calc_boot_aggregate(entry->template.digest);
+ if (result < 0) {
+ audit_cause = "hashing_error";
+ kfree(entry);
+ goto err_out;
+ }
+ }
+ result = ima_store_template(entry, violation, NULL);
+ if (result < 0)
+ kfree(entry);
+ return;
+err_out:
+ integrity_audit_msg(AUDIT_INTEGRITY_PCR, NULL, boot_aggregate_name, op,
+ audit_cause, result, 0);
+}
+
+int __init ima_init(void)
+{
+ u8 pcr_i[IMA_DIGEST_SIZE];
+ int rc;
+
+ ima_used_chip = 0;
+ rc = tpm_pcr_read(TPM_ANY_NUM, 0, pcr_i);
+ if (rc == 0)
+ ima_used_chip = 1;
+
+ if (!ima_used_chip)
+ pr_info("IMA: No TPM chip found, activating TPM-bypass!\n");
+
+ ima_add_boot_aggregate(); /* boot aggregate must be first entry */
+ ima_init_policy();
+
+ return ima_fs_init();
+}
+
+void __exit ima_cleanup(void)
+{
+ ima_fs_cleanup();
+}
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_main.c b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_main.c
new file mode 100644
index 0000000..1eff5cb
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_main.c
@@ -0,0 +1,241 @@
+/*
+ * Copyright (C) 2005,2006,2007,2008 IBM Corporation
+ *
+ * Authors:
+ * Reiner Sailer <sailer@watson.ibm.com>
+ * Serge Hallyn <serue@us.ibm.com>
+ * Kylene Hall <kylene@us.ibm.com>
+ * Mimi Zohar <zohar@us.ibm.com>
+ *
+ * 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, version 2 of the
+ * License.
+ *
+ * File: ima_main.c
+ * implements the IMA hooks: ima_bprm_check, ima_file_mmap,
+ * and ima_file_check.
+ */
+#include <linux/module.h>
+#include <linux/file.h>
+#include <linux/binfmts.h>
+#include <linux/mount.h>
+#include <linux/mman.h>
+#include <linux/slab.h>
+#include <linux/ima.h>
+
+#include "ima.h"
+
+int ima_initialized;
+
+char *ima_hash = "sha1";
+static int __init hash_setup(char *str)
+{
+ if (strncmp(str, "md5", 3) == 0)
+ ima_hash = "md5";
+ return 1;
+}
+__setup("ima_hash=", hash_setup);
+
+/*
+ * ima_rdwr_violation_check
+ *
+ * Only invalidate the PCR for measured files:
+ * - Opening a file for write when already open for read,
+ * results in a time of measure, time of use (ToMToU) error.
+ * - Opening a file for read when already open for write,
+ * could result in a file measurement error.
+ *
+ */
+static void ima_rdwr_violation_check(struct file *file)
+{
+ struct dentry *dentry = file->f_path.dentry;
+ struct inode *inode = dentry->d_inode;
+ fmode_t mode = file->f_mode;
+ int rc;
+ bool send_tomtou = false, send_writers = false;
+
+ if (!S_ISREG(inode->i_mode) || !ima_initialized)
+ return;
+
+ mutex_lock(&inode->i_mutex); /* file metadata: permissions, xattr */
+
+ if (mode & FMODE_WRITE) {
+ if (atomic_read(&inode->i_readcount) && IS_IMA(inode))
+ send_tomtou = true;
+ goto out;
+ }
+
+ rc = ima_must_measure(inode, MAY_READ, FILE_CHECK);
+ if (rc < 0)
+ goto out;
+
+ if (atomic_read(&inode->i_writecount) > 0)
+ send_writers = true;
+out:
+ mutex_unlock(&inode->i_mutex);
+
+ if (send_tomtou)
+ ima_add_violation(inode, dentry->d_name.name, "invalid_pcr",
+ "ToMToU");
+ if (send_writers)
+ ima_add_violation(inode, dentry->d_name.name, "invalid_pcr",
+ "open_writers");
+}
+
+static void ima_check_last_writer(struct integrity_iint_cache *iint,
+ struct inode *inode,
+ struct file *file)
+{
+ fmode_t mode = file->f_mode;
+
+ mutex_lock(&iint->mutex);
+ if (mode & FMODE_WRITE &&
+ atomic_read(&inode->i_writecount) == 1 &&
+ iint->version != inode->i_version)
+ iint->flags &= ~IMA_MEASURED;
+ mutex_unlock(&iint->mutex);
+}
+
+/**
+ * ima_file_free - called on __fput()
+ * @file: pointer to file structure being freed
+ *
+ * Flag files that changed, based on i_version
+ */
+void ima_file_free(struct file *file)
+{
+ struct inode *inode = file->f_dentry->d_inode;
+ struct integrity_iint_cache *iint;
+
+ if (!iint_initialized || !S_ISREG(inode->i_mode))
+ return;
+
+ iint = integrity_iint_find(inode);
+ if (!iint)
+ return;
+
+ ima_check_last_writer(iint, inode, file);
+}
+
+static int process_measurement(struct file *file, const unsigned char *filename,
+ int mask, int function)
+{
+ struct inode *inode = file->f_dentry->d_inode;
+ struct integrity_iint_cache *iint;
+ int rc = 0;
+
+ if (!ima_initialized || !S_ISREG(inode->i_mode))
+ return 0;
+
+ rc = ima_must_measure(inode, mask, function);
+ if (rc != 0)
+ return rc;
+retry:
+ iint = integrity_iint_find(inode);
+ if (!iint) {
+ rc = integrity_inode_alloc(inode);
+ if (!rc || rc == -EEXIST)
+ goto retry;
+ return rc;
+ }
+
+ mutex_lock(&iint->mutex);
+
+ rc = iint->flags & IMA_MEASURED ? 1 : 0;
+ if (rc != 0)
+ goto out;
+
+ rc = ima_collect_measurement(iint, file);
+ if (!rc)
+ ima_store_measurement(iint, file, filename);
+out:
+ mutex_unlock(&iint->mutex);
+ return rc;
+}
+
+/**
+ * ima_file_mmap - based on policy, collect/store measurement.
+ * @file: pointer to the file to be measured (May be NULL)
+ * @prot: contains the protection that will be applied by the kernel.
+ *
+ * Measure files being mmapped executable based on the ima_must_measure()
+ * policy decision.
+ *
+ * Return 0 on success, an error code on failure.
+ * (Based on the results of appraise_measurement().)
+ */
+int ima_file_mmap(struct file *file, unsigned long prot)
+{
+ int rc;
+
+ if (!file)
+ return 0;
+ if (prot & PROT_EXEC)
+ rc = process_measurement(file, file->f_dentry->d_name.name,
+ MAY_EXEC, FILE_MMAP);
+ return 0;
+}
+
+/**
+ * ima_bprm_check - based on policy, collect/store measurement.
+ * @bprm: contains the linux_binprm structure
+ *
+ * The OS protects against an executable file, already open for write,
+ * from being executed in deny_write_access() and an executable file,
+ * already open for execute, from being modified in get_write_access().
+ * So we can be certain that what we verify and measure here is actually
+ * what is being executed.
+ *
+ * Return 0 on success, an error code on failure.
+ * (Based on the results of appraise_measurement().)
+ */
+int ima_bprm_check(struct linux_binprm *bprm)
+{
+ int rc;
+
+ rc = process_measurement(bprm->file, bprm->filename,
+ MAY_EXEC, BPRM_CHECK);
+ return 0;
+}
+
+/**
+ * ima_path_check - based on policy, collect/store measurement.
+ * @file: pointer to the file to be measured
+ * @mask: contains MAY_READ, MAY_WRITE or MAY_EXECUTE
+ *
+ * Measure files based on the ima_must_measure() policy decision.
+ *
+ * Always return 0 and audit dentry_open failures.
+ * (Return code will be based upon measurement appraisal.)
+ */
+int ima_file_check(struct file *file, int mask)
+{
+ int rc;
+
+ ima_rdwr_violation_check(file);
+ rc = process_measurement(file, file->f_dentry->d_name.name,
+ mask & (MAY_READ | MAY_WRITE | MAY_EXEC),
+ FILE_CHECK);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ima_file_check);
+
+static int __init init_ima(void)
+{
+ int error;
+
+ error = ima_init();
+ ima_initialized = 1;
+ return error;
+}
+
+static void __exit cleanup_ima(void)
+{
+ ima_cleanup();
+}
+
+late_initcall(init_ima); /* Start IMA after the TPM is available */
+
+MODULE_DESCRIPTION("Integrity Measurement Architecture");
+MODULE_LICENSE("GPL");
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_policy.c b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_policy.c
new file mode 100644
index 0000000..d6aab27
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_policy.c
@@ -0,0 +1,492 @@
+/*
+ * Copyright (C) 2008 IBM Corporation
+ * Author: Mimi Zohar <zohar@us.ibm.com>
+ *
+ * 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, version 2 of the License.
+ *
+ * ima_policy.c
+ * - initialize default measure policy rules
+ *
+ */
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/security.h>
+#include <linux/magic.h>
+#include <linux/parser.h>
+#include <linux/slab.h>
+
+#include "ima.h"
+
+/* flags definitions */
+#define IMA_FUNC 0x0001
+#define IMA_MASK 0x0002
+#define IMA_FSMAGIC 0x0004
+#define IMA_UID 0x0008
+
+enum ima_action { UNKNOWN = -1, DONT_MEASURE = 0, MEASURE };
+
+#define MAX_LSM_RULES 6
+enum lsm_rule_types { LSM_OBJ_USER, LSM_OBJ_ROLE, LSM_OBJ_TYPE,
+ LSM_SUBJ_USER, LSM_SUBJ_ROLE, LSM_SUBJ_TYPE
+};
+
+struct ima_measure_rule_entry {
+ struct list_head list;
+ enum ima_action action;
+ unsigned int flags;
+ enum ima_hooks func;
+ int mask;
+ unsigned long fsmagic;
+ uid_t uid;
+ struct {
+ void *rule; /* LSM file metadata specific */
+ int type; /* audit type */
+ } lsm[MAX_LSM_RULES];
+};
+
+/*
+ * Without LSM specific knowledge, the default policy can only be
+ * written in terms of .action, .func, .mask, .fsmagic, and .uid
+ */
+
+/*
+ * The minimum rule set to allow for full TCB coverage. Measures all files
+ * opened or mmap for exec and everything read by root. Dangerous because
+ * normal users can easily run the machine out of memory simply building
+ * and running executables.
+ */
+static struct ima_measure_rule_entry default_rules[] = {
+ {.action = DONT_MEASURE,.fsmagic = PROC_SUPER_MAGIC,.flags = IMA_FSMAGIC},
+ {.action = DONT_MEASURE,.fsmagic = SYSFS_MAGIC,.flags = IMA_FSMAGIC},
+ {.action = DONT_MEASURE,.fsmagic = DEBUGFS_MAGIC,.flags = IMA_FSMAGIC},
+ {.action = DONT_MEASURE,.fsmagic = TMPFS_MAGIC,.flags = IMA_FSMAGIC},
+ {.action = DONT_MEASURE,.fsmagic = SECURITYFS_MAGIC,.flags = IMA_FSMAGIC},
+ {.action = DONT_MEASURE,.fsmagic = SELINUX_MAGIC,.flags = IMA_FSMAGIC},
+ {.action = MEASURE,.func = FILE_MMAP,.mask = MAY_EXEC,
+ .flags = IMA_FUNC | IMA_MASK},
+ {.action = MEASURE,.func = BPRM_CHECK,.mask = MAY_EXEC,
+ .flags = IMA_FUNC | IMA_MASK},
+ {.action = MEASURE,.func = FILE_CHECK,.mask = MAY_READ,.uid = 0,
+ .flags = IMA_FUNC | IMA_MASK | IMA_UID},
+};
+
+static LIST_HEAD(measure_default_rules);
+static LIST_HEAD(measure_policy_rules);
+static struct list_head *ima_measure;
+
+static DEFINE_MUTEX(ima_measure_mutex);
+
+static bool ima_use_tcb __initdata;
+static int __init default_policy_setup(char *str)
+{
+ ima_use_tcb = 1;
+ return 1;
+}
+__setup("ima_tcb", default_policy_setup);
+
+/**
+ * ima_match_rules - determine whether an inode matches the measure rule.
+ * @rule: a pointer to a rule
+ * @inode: a pointer to an inode
+ * @func: LIM hook identifier
+ * @mask: requested action (MAY_READ | MAY_WRITE | MAY_APPEND | MAY_EXEC)
+ *
+ * Returns true on rule match, false on failure.
+ */
+static bool ima_match_rules(struct ima_measure_rule_entry *rule,
+ struct inode *inode, enum ima_hooks func, int mask)
+{
+ struct task_struct *tsk = current;
+ const struct cred *cred = current_cred();
+ int i;
+
+ if ((rule->flags & IMA_FUNC) && rule->func != func)
+ return false;
+ if ((rule->flags & IMA_MASK) && rule->mask != mask)
+ return false;
+ if ((rule->flags & IMA_FSMAGIC)
+ && rule->fsmagic != inode->i_sb->s_magic)
+ return false;
+ if ((rule->flags & IMA_UID) && rule->uid != cred->uid)
+ return false;
+ for (i = 0; i < MAX_LSM_RULES; i++) {
+ int rc = 0;
+ u32 osid, sid;
+
+ if (!rule->lsm[i].rule)
+ continue;
+
+ switch (i) {
+ case LSM_OBJ_USER:
+ case LSM_OBJ_ROLE:
+ case LSM_OBJ_TYPE:
+ security_inode_getsecid(inode, &osid);
+ rc = security_filter_rule_match(osid,
+ rule->lsm[i].type,
+ Audit_equal,
+ rule->lsm[i].rule,
+ NULL);
+ break;
+ case LSM_SUBJ_USER:
+ case LSM_SUBJ_ROLE:
+ case LSM_SUBJ_TYPE:
+ security_task_getsecid(tsk, &sid);
+ rc = security_filter_rule_match(sid,
+ rule->lsm[i].type,
+ Audit_equal,
+ rule->lsm[i].rule,
+ NULL);
+ default:
+ break;
+ }
+ if (!rc)
+ return false;
+ }
+ return true;
+}
+
+/**
+ * ima_match_policy - decision based on LSM and other conditions
+ * @inode: pointer to an inode for which the policy decision is being made
+ * @func: IMA hook identifier
+ * @mask: requested action (MAY_READ | MAY_WRITE | MAY_APPEND | MAY_EXEC)
+ *
+ * Measure decision based on func/mask/fsmagic and LSM(subj/obj/type)
+ * conditions.
+ *
+ * (There is no need for locking when walking the policy list,
+ * as elements in the list are never deleted, nor does the list
+ * change.)
+ */
+int ima_match_policy(struct inode *inode, enum ima_hooks func, int mask)
+{
+ struct ima_measure_rule_entry *entry;
+
+ list_for_each_entry(entry, ima_measure, list) {
+ bool rc;
+
+ rc = ima_match_rules(entry, inode, func, mask);
+ if (rc)
+ return entry->action;
+ }
+ return 0;
+}
+
+/**
+ * ima_init_policy - initialize the default measure rules.
+ *
+ * ima_measure points to either the measure_default_rules or the
+ * the new measure_policy_rules.
+ */
+void __init ima_init_policy(void)
+{
+ int i, entries;
+
+ /* if !ima_use_tcb set entries = 0 so we load NO default rules */
+ if (ima_use_tcb)
+ entries = ARRAY_SIZE(default_rules);
+ else
+ entries = 0;
+
+ for (i = 0; i < entries; i++)
+ list_add_tail(&default_rules[i].list, &measure_default_rules);
+ ima_measure = &measure_default_rules;
+}
+
+/**
+ * ima_update_policy - update default_rules with new measure rules
+ *
+ * Called on file .release to update the default rules with a complete new
+ * policy. Once updated, the policy is locked, no additional rules can be
+ * added to the policy.
+ */
+void ima_update_policy(void)
+{
+ const char *op = "policy_update";
+ const char *cause = "already exists";
+ int result = 1;
+ int audit_info = 0;
+
+ if (ima_measure == &measure_default_rules) {
+ ima_measure = &measure_policy_rules;
+ cause = "complete";
+ result = 0;
+ }
+ integrity_audit_msg(AUDIT_INTEGRITY_STATUS, NULL,
+ NULL, op, cause, result, audit_info);
+}
+
+enum {
+ Opt_err = -1,
+ Opt_measure = 1, Opt_dont_measure,
+ Opt_obj_user, Opt_obj_role, Opt_obj_type,
+ Opt_subj_user, Opt_subj_role, Opt_subj_type,
+ Opt_func, Opt_mask, Opt_fsmagic, Opt_uid
+};
+
+static match_table_t policy_tokens = {
+ {Opt_measure, "measure"},
+ {Opt_dont_measure, "dont_measure"},
+ {Opt_obj_user, "obj_user=%s"},
+ {Opt_obj_role, "obj_role=%s"},
+ {Opt_obj_type, "obj_type=%s"},
+ {Opt_subj_user, "subj_user=%s"},
+ {Opt_subj_role, "subj_role=%s"},
+ {Opt_subj_type, "subj_type=%s"},
+ {Opt_func, "func=%s"},
+ {Opt_mask, "mask=%s"},
+ {Opt_fsmagic, "fsmagic=%s"},
+ {Opt_uid, "uid=%s"},
+ {Opt_err, NULL}
+};
+
+static int ima_lsm_rule_init(struct ima_measure_rule_entry *entry,
+ char *args, int lsm_rule, int audit_type)
+{
+ int result;
+
+ if (entry->lsm[lsm_rule].rule)
+ return -EINVAL;
+
+ entry->lsm[lsm_rule].type = audit_type;
+ result = security_filter_rule_init(entry->lsm[lsm_rule].type,
+ Audit_equal, args,
+ &entry->lsm[lsm_rule].rule);
+ if (!entry->lsm[lsm_rule].rule)
+ return -EINVAL;
+ return result;
+}
+
+static void ima_log_string(struct audit_buffer *ab, char *key, char *value)
+{
+ audit_log_format(ab, "%s=", key);
+ audit_log_untrustedstring(ab, value);
+ audit_log_format(ab, " ");
+}
+
+static int ima_parse_rule(char *rule, struct ima_measure_rule_entry *entry)
+{
+ struct audit_buffer *ab;
+ char *p;
+ int result = 0;
+
+ ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_INTEGRITY_RULE);
+
+ entry->uid = -1;
+ entry->action = UNKNOWN;
+ while ((p = strsep(&rule, " \t")) != NULL) {
+ substring_t args[MAX_OPT_ARGS];
+ int token;
+ unsigned long lnum;
+
+ if (result < 0)
+ break;
+ if ((*p == '\0') || (*p == ' ') || (*p == '\t'))
+ continue;
+ token = match_token(p, policy_tokens, args);
+ switch (token) {
+ case Opt_measure:
+ ima_log_string(ab, "action", "measure");
+
+ if (entry->action != UNKNOWN)
+ result = -EINVAL;
+
+ entry->action = MEASURE;
+ break;
+ case Opt_dont_measure:
+ ima_log_string(ab, "action", "dont_measure");
+
+ if (entry->action != UNKNOWN)
+ result = -EINVAL;
+
+ entry->action = DONT_MEASURE;
+ break;
+ case Opt_func:
+ ima_log_string(ab, "func", args[0].from);
+
+ if (entry->func)
+ result = -EINVAL;
+
+ if (strcmp(args[0].from, "FILE_CHECK") == 0)
+ entry->func = FILE_CHECK;
+ /* PATH_CHECK is for backwards compat */
+ else if (strcmp(args[0].from, "PATH_CHECK") == 0)
+ entry->func = FILE_CHECK;
+ else if (strcmp(args[0].from, "FILE_MMAP") == 0)
+ entry->func = FILE_MMAP;
+ else if (strcmp(args[0].from, "BPRM_CHECK") == 0)
+ entry->func = BPRM_CHECK;
+ else
+ result = -EINVAL;
+ if (!result)
+ entry->flags |= IMA_FUNC;
+ break;
+ case Opt_mask:
+ ima_log_string(ab, "mask", args[0].from);
+
+ if (entry->mask)
+ result = -EINVAL;
+
+ if ((strcmp(args[0].from, "MAY_EXEC")) == 0)
+ entry->mask = MAY_EXEC;
+ else if (strcmp(args[0].from, "MAY_WRITE") == 0)
+ entry->mask = MAY_WRITE;
+ else if (strcmp(args[0].from, "MAY_READ") == 0)
+ entry->mask = MAY_READ;
+ else if (strcmp(args[0].from, "MAY_APPEND") == 0)
+ entry->mask = MAY_APPEND;
+ else
+ result = -EINVAL;
+ if (!result)
+ entry->flags |= IMA_MASK;
+ break;
+ case Opt_fsmagic:
+ ima_log_string(ab, "fsmagic", args[0].from);
+
+ if (entry->fsmagic) {
+ result = -EINVAL;
+ break;
+ }
+
+ result = strict_strtoul(args[0].from, 16,
+ &entry->fsmagic);
+ if (!result)
+ entry->flags |= IMA_FSMAGIC;
+ break;
+ case Opt_uid:
+ ima_log_string(ab, "uid", args[0].from);
+
+ if (entry->uid != -1) {
+ result = -EINVAL;
+ break;
+ }
+
+ result = strict_strtoul(args[0].from, 10, &lnum);
+ if (!result) {
+ entry->uid = (uid_t) lnum;
+ if (entry->uid != lnum)
+ result = -EINVAL;
+ else
+ entry->flags |= IMA_UID;
+ }
+ break;
+ case Opt_obj_user:
+ ima_log_string(ab, "obj_user", args[0].from);
+ result = ima_lsm_rule_init(entry, args[0].from,
+ LSM_OBJ_USER,
+ AUDIT_OBJ_USER);
+ break;
+ case Opt_obj_role:
+ ima_log_string(ab, "obj_role", args[0].from);
+ result = ima_lsm_rule_init(entry, args[0].from,
+ LSM_OBJ_ROLE,
+ AUDIT_OBJ_ROLE);
+ break;
+ case Opt_obj_type:
+ ima_log_string(ab, "obj_type", args[0].from);
+ result = ima_lsm_rule_init(entry, args[0].from,
+ LSM_OBJ_TYPE,
+ AUDIT_OBJ_TYPE);
+ break;
+ case Opt_subj_user:
+ ima_log_string(ab, "subj_user", args[0].from);
+ result = ima_lsm_rule_init(entry, args[0].from,
+ LSM_SUBJ_USER,
+ AUDIT_SUBJ_USER);
+ break;
+ case Opt_subj_role:
+ ima_log_string(ab, "subj_role", args[0].from);
+ result = ima_lsm_rule_init(entry, args[0].from,
+ LSM_SUBJ_ROLE,
+ AUDIT_SUBJ_ROLE);
+ break;
+ case Opt_subj_type:
+ ima_log_string(ab, "subj_type", args[0].from);
+ result = ima_lsm_rule_init(entry, args[0].from,
+ LSM_SUBJ_TYPE,
+ AUDIT_SUBJ_TYPE);
+ break;
+ case Opt_err:
+ ima_log_string(ab, "UNKNOWN", p);
+ result = -EINVAL;
+ break;
+ }
+ }
+ if (!result && (entry->action == UNKNOWN))
+ result = -EINVAL;
+
+ audit_log_format(ab, "res=%d", !result);
+ audit_log_end(ab);
+ return result;
+}
+
+/**
+ * ima_parse_add_rule - add a rule to measure_policy_rules
+ * @rule - ima measurement policy rule
+ *
+ * Uses a mutex to protect the policy list from multiple concurrent writers.
+ * Returns the length of the rule parsed, an error code on failure
+ */
+ssize_t ima_parse_add_rule(char *rule)
+{
+ const char *op = "update_policy";
+ char *p;
+ struct ima_measure_rule_entry *entry;
+ ssize_t result, len;
+ int audit_info = 0;
+
+ /* Prevent installed policy from changing */
+ if (ima_measure != &measure_default_rules) {
+ integrity_audit_msg(AUDIT_INTEGRITY_STATUS, NULL,
+ NULL, op, "already exists",
+ -EACCES, audit_info);
+ return -EACCES;
+ }
+
+ entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry) {
+ integrity_audit_msg(AUDIT_INTEGRITY_STATUS, NULL,
+ NULL, op, "-ENOMEM", -ENOMEM, audit_info);
+ return -ENOMEM;
+ }
+
+ INIT_LIST_HEAD(&entry->list);
+
+ p = strsep(&rule, "\n");
+ len = strlen(p) + 1;
+
+ if (*p == '#') {
+ kfree(entry);
+ return len;
+ }
+
+ result = ima_parse_rule(p, entry);
+ if (result) {
+ kfree(entry);
+ integrity_audit_msg(AUDIT_INTEGRITY_STATUS, NULL,
+ NULL, op, "invalid policy", result,
+ audit_info);
+ return result;
+ }
+
+ mutex_lock(&ima_measure_mutex);
+ list_add_tail(&entry->list, &measure_policy_rules);
+ mutex_unlock(&ima_measure_mutex);
+
+ return len;
+}
+
+/* ima_delete_rules called to cleanup invalid policy */
+void ima_delete_rules(void)
+{
+ struct ima_measure_rule_entry *entry, *tmp;
+
+ mutex_lock(&ima_measure_mutex);
+ list_for_each_entry_safe(entry, tmp, &measure_policy_rules, list) {
+ list_del(&entry->list);
+ kfree(entry);
+ }
+ mutex_unlock(&ima_measure_mutex);
+}
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_queue.c b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_queue.c
new file mode 100644
index 0000000..55a6271
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/ima/ima_queue.c
@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2005,2006,2007,2008 IBM Corporation
+ *
+ * Authors:
+ * Serge Hallyn <serue@us.ibm.com>
+ * Reiner Sailer <sailer@watson.ibm.com>
+ * Mimi Zohar <zohar@us.ibm.com>
+ *
+ * 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, version 2 of the
+ * License.
+ *
+ * File: ima_queue.c
+ * Implements queues that store template measurements and
+ * maintains aggregate over the stored measurements
+ * in the pre-configured TPM PCR (if available).
+ * The measurement list is append-only. No entry is
+ * ever removed or changed during the boot-cycle.
+ */
+#include <linux/module.h>
+#include <linux/rculist.h>
+#include <linux/slab.h>
+#include "ima.h"
+
+#define AUDIT_CAUSE_LEN_MAX 32
+
+LIST_HEAD(ima_measurements); /* list of all measurements */
+
+/* key: inode (before secure-hashing a file) */
+struct ima_h_table ima_htable = {
+ .len = ATOMIC_LONG_INIT(0),
+ .violations = ATOMIC_LONG_INIT(0),
+ .queue[0 ... IMA_MEASURE_HTABLE_SIZE - 1] = HLIST_HEAD_INIT
+};
+
+/* mutex protects atomicity of extending measurement list
+ * and extending the TPM PCR aggregate. Since tpm_extend can take
+ * long (and the tpm driver uses a mutex), we can't use the spinlock.
+ */
+static DEFINE_MUTEX(ima_extend_list_mutex);
+
+/* lookup up the digest value in the hash table, and return the entry */
+static struct ima_queue_entry *ima_lookup_digest_entry(u8 *digest_value)
+{
+ struct ima_queue_entry *qe, *ret = NULL;
+ unsigned int key;
+ struct hlist_node *pos;
+ int rc;
+
+ key = ima_hash_key(digest_value);
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(qe, pos, &ima_htable.queue[key], hnext) {
+ rc = memcmp(qe->entry->digest, digest_value, IMA_DIGEST_SIZE);
+ if (rc == 0) {
+ ret = qe;
+ break;
+ }
+ }
+ rcu_read_unlock();
+ return ret;
+}
+
+/* ima_add_template_entry helper function:
+ * - Add template entry to measurement list and hash table.
+ *
+ * (Called with ima_extend_list_mutex held.)
+ */
+static int ima_add_digest_entry(struct ima_template_entry *entry)
+{
+ struct ima_queue_entry *qe;
+ unsigned int key;
+
+ qe = kmalloc(sizeof(*qe), GFP_KERNEL);
+ if (qe == NULL) {
+ pr_err("IMA: OUT OF MEMORY ERROR creating queue entry.\n");
+ return -ENOMEM;
+ }
+ qe->entry = entry;
+
+ INIT_LIST_HEAD(&qe->later);
+ list_add_tail_rcu(&qe->later, &ima_measurements);
+
+ atomic_long_inc(&ima_htable.len);
+ key = ima_hash_key(entry->digest);
+ hlist_add_head_rcu(&qe->hnext, &ima_htable.queue[key]);
+ return 0;
+}
+
+static int ima_pcr_extend(const u8 *hash)
+{
+ int result = 0;
+
+ if (!ima_used_chip)
+ return result;
+
+ result = tpm_pcr_extend(TPM_ANY_NUM, CONFIG_IMA_MEASURE_PCR_IDX, hash);
+ if (result != 0)
+ pr_err("IMA: Error Communicating to TPM chip, result: %d\n",
+ result);
+ return result;
+}
+
+/* Add template entry to the measurement list and hash table,
+ * and extend the pcr.
+ */
+int ima_add_template_entry(struct ima_template_entry *entry, int violation,
+ const char *op, struct inode *inode)
+{
+ u8 digest[IMA_DIGEST_SIZE];
+ const char *audit_cause = "hash_added";
+ char tpm_audit_cause[AUDIT_CAUSE_LEN_MAX];
+ int audit_info = 1;
+ int result = 0, tpmresult = 0;
+
+ mutex_lock(&ima_extend_list_mutex);
+ if (!violation) {
+ memcpy(digest, entry->digest, sizeof digest);
+ if (ima_lookup_digest_entry(digest)) {
+ audit_cause = "hash_exists";
+ result = -EEXIST;
+ goto out;
+ }
+ }
+
+ result = ima_add_digest_entry(entry);
+ if (result < 0) {
+ audit_cause = "ENOMEM";
+ audit_info = 0;
+ goto out;
+ }
+
+ if (violation) /* invalidate pcr */
+ memset(digest, 0xff, sizeof digest);
+
+ tpmresult = ima_pcr_extend(digest);
+ if (tpmresult != 0) {
+ snprintf(tpm_audit_cause, AUDIT_CAUSE_LEN_MAX, "TPM_error(%d)",
+ tpmresult);
+ audit_cause = tpm_audit_cause;
+ audit_info = 0;
+ }
+out:
+ mutex_unlock(&ima_extend_list_mutex);
+ integrity_audit_msg(AUDIT_INTEGRITY_PCR, inode,
+ entry->template.file_name,
+ op, audit_cause, result, audit_info);
+ return result;
+}
diff --git a/ap/os/linux/linux-3.4.x/security/integrity/integrity.h b/ap/os/linux/linux-3.4.x/security/integrity/integrity.h
new file mode 100644
index 0000000..7a25ece
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/security/integrity/integrity.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2009-2010 IBM Corporation
+ *
+ * Authors:
+ * Mimi Zohar <zohar@us.ibm.com>
+ *
+ * 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, version 2 of the
+ * License.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/integrity.h>
+#include <crypto/sha.h>
+
+/* iint cache flags */
+#define IMA_MEASURED 0x01
+
+enum evm_ima_xattr_type {
+ IMA_XATTR_DIGEST = 0x01,
+ EVM_XATTR_HMAC,
+ EVM_IMA_XATTR_DIGSIG,
+};
+
+struct evm_ima_xattr_data {
+ u8 type;
+ u8 digest[SHA1_DIGEST_SIZE];
+} __attribute__((packed));
+
+/* integrity data associated with an inode */
+struct integrity_iint_cache {
+ struct rb_node rb_node; /* rooted in integrity_iint_tree */
+ struct inode *inode; /* back pointer to inode in question */
+ u64 version; /* track inode changes */
+ unsigned char flags;
+ u8 digest[SHA1_DIGEST_SIZE];
+ struct mutex mutex; /* protects: version, flags, digest */
+ enum integrity_status evm_status;
+};
+
+/* rbtree tree calls to lookup, insert, delete
+ * integrity data associated with an inode.
+ */
+struct integrity_iint_cache *integrity_iint_insert(struct inode *inode);
+struct integrity_iint_cache *integrity_iint_find(struct inode *inode);
+
+#define INTEGRITY_KEYRING_EVM 0
+#define INTEGRITY_KEYRING_MODULE 1
+#define INTEGRITY_KEYRING_IMA 2
+#define INTEGRITY_KEYRING_MAX 3
+
+#ifdef CONFIG_INTEGRITY_SIGNATURE
+
+int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
+ const char *digest, int digestlen);
+
+#else
+
+static inline int integrity_digsig_verify(const unsigned int id,
+ const char *sig, int siglen,
+ const char *digest, int digestlen)
+{
+ return -EOPNOTSUPP;
+}
+
+#endif /* CONFIG_INTEGRITY_SIGNATURE */
+
+/* set during initialization */
+extern int iint_initialized;