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author | Ahmed S. Darwish <darwish.07@gmail.com> | 2008-03-01 23:00:05 +0300 |
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committer | James Morris <jmorris@namei.org> | 2008-04-19 03:52:36 +0400 |
commit | 03d37d25e0f91b28c4b6d002be6221f1af4b19d8 (patch) | |
tree | de56538f7b6e7623d7cee2b0fcdc8f9764957252 /include/linux/security.h | |
parent | 6b89a74be0fbbc6cc639d5cf7dcf8e6ee0f120a7 (diff) | |
download | linux-03d37d25e0f91b28c4b6d002be6221f1af4b19d8.tar.xz |
LSM/Audit: Introduce generic Audit LSM hooks
Introduce a generic Audit interface for security modules
by adding the following new LSM hooks:
audit_rule_init(field, op, rulestr, lsmrule)
audit_rule_known(krule)
audit_rule_match(secid, field, op, rule, actx)
audit_rule_free(rule)
Those hooks are only available if CONFIG_AUDIT is enabled.
Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Ahmed S. Darwish <darwish.07@gmail.com>
Acked-by: James Morris <jmorris@namei.org>
Reviewed-by: Paul Moore <paul.moore@hp.com>
Diffstat (limited to 'include/linux/security.h')
-rw-r--r-- | include/linux/security.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/include/linux/security.h b/include/linux/security.h index 45717d9d9656..697f228daf19 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -37,6 +37,7 @@ extern unsigned securebits; struct ctl_table; +struct audit_krule; /* * These functions are in security/capability.c and are used @@ -1235,6 +1236,37 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts) * @secdata contains the security context. * @seclen contains the length of the security context. * + * Security hooks for Audit + * + * @audit_rule_init: + * Allocate and initialize an LSM audit rule structure. + * @field contains the required Audit action. Fields flags are defined in include/linux/audit.h + * @op contains the operator the rule uses. + * @rulestr contains the context where the rule will be applied to. + * @lsmrule contains a pointer to receive the result. + * Return 0 if @lsmrule has been successfully set, + * -EINVAL in case of an invalid rule. + * + * @audit_rule_known: + * Specifies whether given @rule contains any fields related to current LSM. + * @rule contains the audit rule of interest. + * Return 1 in case of relation found, 0 otherwise. + * + * @audit_rule_match: + * Determine if given @secid matches a rule previously approved + * by @audit_rule_known. + * @secid contains the security id in question. + * @field contains the field which relates to current LSM. + * @op contains the operator that will be used for matching. + * @rule points to the audit rule that will be checked against. + * @actx points to the audit context associated with the check. + * Return 1 if secid matches the rule, 0 if it does not, -ERRNO on failure. + * + * @audit_rule_free: + * Deallocate the LSM audit rule structure previously allocated by + * audit_rule_init. + * @rule contains the allocated rule + * * This is the main security structure. */ struct security_operations { @@ -1494,6 +1526,13 @@ struct security_operations { #endif /* CONFIG_KEYS */ +#ifdef CONFIG_AUDIT + int (*audit_rule_init)(u32 field, u32 op, char *rulestr, void **lsmrule); + int (*audit_rule_known)(struct audit_krule *krule); + int (*audit_rule_match)(u32 secid, u32 field, u32 op, void *lsmrule, + struct audit_context *actx); + void (*audit_rule_free)(void *lsmrule); +#endif /* CONFIG_AUDIT */ }; /* prototypes */ @@ -2700,5 +2739,38 @@ static inline int security_key_permission(key_ref_t key_ref, #endif #endif /* CONFIG_KEYS */ +#ifdef CONFIG_AUDIT +#ifdef CONFIG_SECURITY +int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule); +int security_audit_rule_known(struct audit_krule *krule); +int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule, + struct audit_context *actx); +void security_audit_rule_free(void *lsmrule); + +#else + +static inline int security_audit_rule_init(u32 field, u32 op, char *rulestr, + void **lsmrule) +{ + return 0; +} + +static inline int security_audit_rule_known(struct audit_krule *krule) +{ + return 0; +} + +static inline int security_audit_rule_match(u32 secid, u32 field, u32 op, + void *lsmrule, struct audit_context *actx) +{ + return 0; +} + +static inline void security_audit_rule_free(void *lsmrule) +{ } + +#endif /* CONFIG_SECURITY */ +#endif /* CONFIG_AUDIT */ + #endif /* ! __LINUX_SECURITY_H */ |