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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /security/integrity/integrity.h
Initial import
Diffstat (limited to 'security/integrity/integrity.h')
-rw-r--r--security/integrity/integrity.h186
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diff --git a/security/integrity/integrity.h b/security/integrity/integrity.h
new file mode 100644
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+++ b/security/integrity/integrity.h
@@ -0,0 +1,186 @@
+/*
+ * 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>
+#include <linux/key.h>
+
+/* iint action cache flags */
+#define IMA_MEASURE 0x00000001
+#define IMA_MEASURED 0x00000002
+#define IMA_APPRAISE 0x00000004
+#define IMA_APPRAISED 0x00000008
+/*#define IMA_COLLECT 0x00000010 do not use this flag */
+#define IMA_COLLECTED 0x00000020
+#define IMA_AUDIT 0x00000040
+#define IMA_AUDITED 0x00000080
+
+/* iint cache flags */
+#define IMA_ACTION_FLAGS 0xff000000
+#define IMA_DIGSIG 0x01000000
+#define IMA_DIGSIG_REQUIRED 0x02000000
+#define IMA_PERMIT_DIRECTIO 0x04000000
+#define IMA_NEW_FILE 0x08000000
+
+#define IMA_DO_MASK (IMA_MEASURE | IMA_APPRAISE | IMA_AUDIT | \
+ IMA_APPRAISE_SUBMASK)
+#define IMA_DONE_MASK (IMA_MEASURED | IMA_APPRAISED | IMA_AUDITED | \
+ IMA_COLLECTED | IMA_APPRAISED_SUBMASK)
+
+/* iint subaction appraise cache flags */
+#define IMA_FILE_APPRAISE 0x00000100
+#define IMA_FILE_APPRAISED 0x00000200
+#define IMA_MMAP_APPRAISE 0x00000400
+#define IMA_MMAP_APPRAISED 0x00000800
+#define IMA_BPRM_APPRAISE 0x00001000
+#define IMA_BPRM_APPRAISED 0x00002000
+#define IMA_MODULE_APPRAISE 0x00004000
+#define IMA_MODULE_APPRAISED 0x00008000
+#define IMA_FIRMWARE_APPRAISE 0x00010000
+#define IMA_FIRMWARE_APPRAISED 0x00020000
+#define IMA_APPRAISE_SUBMASK (IMA_FILE_APPRAISE | IMA_MMAP_APPRAISE | \
+ IMA_BPRM_APPRAISE | IMA_MODULE_APPRAISE | \
+ IMA_FIRMWARE_APPRAISE)
+#define IMA_APPRAISED_SUBMASK (IMA_FILE_APPRAISED | IMA_MMAP_APPRAISED | \
+ IMA_BPRM_APPRAISED | IMA_MODULE_APPRAISED | \
+ IMA_FIRMWARE_APPRAISED)
+
+enum evm_ima_xattr_type {
+ IMA_XATTR_DIGEST = 0x01,
+ EVM_XATTR_HMAC,
+ EVM_IMA_XATTR_DIGSIG,
+ IMA_XATTR_DIGEST_NG,
+ IMA_XATTR_LAST
+};
+
+struct evm_ima_xattr_data {
+ u8 type;
+ u8 digest[SHA1_DIGEST_SIZE];
+} __packed;
+
+#define IMA_MAX_DIGEST_SIZE 64
+
+struct ima_digest_data {
+ u8 algo;
+ u8 length;
+ union {
+ struct {
+ u8 unused;
+ u8 type;
+ } sha1;
+ struct {
+ u8 type;
+ u8 algo;
+ } ng;
+ u8 data[2];
+ } xattr;
+ u8 digest[0];
+} __packed;
+
+/*
+ * signature format v2 - for using with asymmetric keys
+ */
+struct signature_v2_hdr {
+ uint8_t type; /* xattr type */
+ uint8_t version; /* signature format version */
+ uint8_t hash_algo; /* Digest algorithm [enum pkey_hash_algo] */
+ uint32_t keyid; /* IMA key identifier - not X509/PGP specific */
+ uint16_t sig_size; /* signature size */
+ uint8_t sig[0]; /* signature payload */
+} __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 long flags;
+ enum integrity_status ima_file_status:4;
+ enum integrity_status ima_mmap_status:4;
+ enum integrity_status ima_bprm_status:4;
+ enum integrity_status ima_module_status:4;
+ enum integrity_status ima_firmware_status:4;
+ enum integrity_status evm_status:4;
+ struct ima_digest_data *ima_hash;
+};
+
+/* rbtree tree calls to lookup, insert, delete
+ * integrity data associated with an inode.
+ */
+struct integrity_iint_cache *integrity_iint_find(struct inode *inode);
+
+int integrity_kernel_read(struct file *file, loff_t offset,
+ char *addr, unsigned long count);
+int __init integrity_read_file(const char *path, char **data);
+
+#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);
+
+int __init integrity_init_keyring(const unsigned int id);
+int __init integrity_load_x509(const unsigned int id, char *path);
+#else
+
+static inline int integrity_digsig_verify(const unsigned int id,
+ const char *sig, int siglen,
+ const char *digest, int digestlen)
+{
+ return -EOPNOTSUPP;
+}
+
+static inline int integrity_init_keyring(const unsigned int id)
+{
+ return 0;
+}
+
+#endif /* CONFIG_INTEGRITY_SIGNATURE */
+
+#ifdef CONFIG_INTEGRITY_ASYMMETRIC_KEYS
+int asymmetric_verify(struct key *keyring, const char *sig,
+ int siglen, const char *data, int datalen);
+#else
+static inline int asymmetric_verify(struct key *keyring, const char *sig,
+ int siglen, const char *data, int datalen)
+{
+ return -EOPNOTSUPP;
+}
+#endif
+
+#ifdef CONFIG_IMA_LOAD_X509
+void __init ima_load_x509(void);
+#else
+static inline void ima_load_x509(void)
+{
+}
+#endif
+
+#ifdef CONFIG_INTEGRITY_AUDIT
+/* 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);
+#else
+static inline void integrity_audit_msg(int audit_msgno, struct inode *inode,
+ const unsigned char *fname,
+ const char *op, const char *cause,
+ int result, int info)
+{
+}
+#endif