From 3323eec921efd815178a23107ab63588c605c0b2 Mon Sep 17 00:00:00 2001 From: Mimi Zohar Date: Wed, 4 Feb 2009 09:06:58 -0500 Subject: integrity: IMA as an integrity service provider IMA provides hardware (TPM) based measurement and attestation for file measurements. As the Trusted Computing (TPM) model requires, IMA measures all files before they are accessed in any way (on the integrity_bprm_check, integrity_path_check and integrity_file_mmap hooks), and commits the measurements to the TPM. Once added to the TPM, measurements can not be removed. In addition, IMA maintains a list of these file measurements, which can be used to validate the aggregate value stored in the TPM. The TPM can sign these measurements, and thus the system can prove, to itself and to a third party, the system's integrity in a way that cannot be circumvented by malicious or compromised software. - alloc ima_template_entry before calling ima_store_template() - log ima_add_boot_aggregate() failure - removed unused IMA_TEMPLATE_NAME_LEN - replaced hard coded string length with #define name Signed-off-by: Mimi Zohar Signed-off-by: James Morris --- include/linux/audit.h | 5 +++++ include/linux/ima.h | 10 ++++++++++ 2 files changed, 15 insertions(+) (limited to 'include') diff --git a/include/linux/audit.h b/include/linux/audit.h index 26c4f6f65a46..8d1f67789b53 100644 --- a/include/linux/audit.h +++ b/include/linux/audit.h @@ -125,6 +125,11 @@ #define AUDIT_LAST_KERN_ANOM_MSG 1799 #define AUDIT_ANOM_PROMISCUOUS 1700 /* Device changed promiscuous mode */ #define AUDIT_ANOM_ABEND 1701 /* Process ended abnormally */ +#define AUDIT_INTEGRITY_DATA 1800 /* Data integrity verification */ +#define AUDIT_INTEGRITY_METADATA 1801 /* Metadata integrity verification */ +#define AUDIT_INTEGRITY_STATUS 1802 /* Integrity enable status */ +#define AUDIT_INTEGRITY_HASH 1803 /* Integrity HASH type */ +#define AUDIT_INTEGRITY_PCR 1804 /* PCR invalidation msgs */ #define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */ diff --git a/include/linux/ima.h b/include/linux/ima.h index 4ed1e4d962e2..dcc3664feee8 100644 --- a/include/linux/ima.h +++ b/include/linux/ima.h @@ -12,6 +12,15 @@ #ifndef _LINUX_IMA_H #define _LINUX_IMA_H +#ifdef CONFIG_IMA +extern int ima_bprm_check(struct linux_binprm *bprm); +extern int ima_inode_alloc(struct inode *inode); +extern void ima_inode_free(struct inode *inode); +extern int ima_path_check(struct path *path, int mask); +extern void ima_file_free(struct file *file); +extern int ima_file_mmap(struct file *file, unsigned long prot); + +#else static inline int ima_bprm_check(struct linux_binprm *bprm) { return 0; @@ -41,4 +50,5 @@ static inline int ima_file_mmap(struct file *file, unsigned long prot) { return 0; } +#endif /* CONFIG_IMA_H */ #endif /* _LINUX_IMA_H */ -- cgit v1.2.3