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authorLinus Torvalds <torvalds@linux-foundation.org>2008-04-18 18:18:30 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-18 18:18:30 -0700
commit3925e6fc1f774048404fdd910b0345b06c699eb4 (patch)
treec9a58417d9492f39f7fe81d4721d674c34dd8be2 /security/security.c
parent334d094504c2fe1c44211ecb49146ae6bca8c321 (diff)
parent7cea51be4e91edad05bd834f3235b45c57783f0d (diff)
downloadlinux-2.6.34-ux500-3925e6fc1f774048404fdd910b0345b06c699eb4.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6: security: fix up documentation for security_module_enable Security: Introduce security= boot parameter Audit: Final renamings and cleanup SELinux: use new audit hooks, remove redundant exports Audit: internally use the new LSM audit hooks LSM/Audit: Introduce generic Audit LSM hooks SELinux: remove redundant exports Netlink: Use generic LSM hook Audit: use new LSM hooks instead of SELinux exports SELinux: setup new inode/ipc getsecid hooks LSM: Introduce inode_getsecid and ipc_getsecid hooks
Diffstat (limited to 'security/security.c')
-rw-r--r--security/security.c73
1 files changed, 72 insertions, 1 deletions
diff --git a/security/security.c b/security/security.c
index 54affd0ce6a..2e250c7028e 100644
--- a/security/security.c
+++ b/security/security.c
@@ -17,6 +17,8 @@
#include <linux/kernel.h>
#include <linux/security.h>
+/* Boot-time LSM user choice */
+static __initdata char chosen_lsm[SECURITY_NAME_MAX + 1];
/* things that live in dummy.c */
extern struct security_operations dummy_security_ops;
@@ -67,13 +69,47 @@ int __init security_init(void)
return 0;
}
+/* Save user chosen LSM */
+static int __init choose_lsm(char *str)
+{
+ strncpy(chosen_lsm, str, SECURITY_NAME_MAX);
+ return 1;
+}
+__setup("security=", choose_lsm);
+
+/**
+ * security_module_enable - Load given security module on boot ?
+ * @ops: a pointer to the struct security_operations that is to be checked.
+ *
+ * Each LSM must pass this method before registering its own operations
+ * to avoid security registration races. This method may also be used
+ * to check if your LSM is currently loaded during kernel initialization.
+ *
+ * Return true if:
+ * -The passed LSM is the one chosen by user at boot time,
+ * -or user didsn't specify a specific LSM and we're the first to ask
+ * for registeration permissoin,
+ * -or the passed LSM is currently loaded.
+ * Otherwise, return false.
+ */
+int __init security_module_enable(struct security_operations *ops)
+{
+ if (!*chosen_lsm)
+ strncpy(chosen_lsm, ops->name, SECURITY_NAME_MAX);
+ else if (strncmp(ops->name, chosen_lsm, SECURITY_NAME_MAX))
+ return 0;
+
+ return 1;
+}
+
/**
* register_security - registers a security framework with the kernel
* @ops: a pointer to the struct security_options that is to be registered
*
* This function is to allow a security module to register itself with the
* kernel security subsystem. Some rudimentary checking is done on the @ops
- * value passed to this function.
+ * value passed to this function. You'll need to check first if your LSM
+ * is allowed to register its @ops by calling security_module_enable(@ops).
*
* If there is already a security module registered with the kernel,
* an error will be returned. Otherwise 0 is returned on success.
@@ -523,6 +559,11 @@ int security_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer
return security_ops->inode_listsecurity(inode, buffer, buffer_size);
}
+void security_inode_getsecid(const struct inode *inode, u32 *secid)
+{
+ security_ops->inode_getsecid(inode, secid);
+}
+
int security_file_permission(struct file *file, int mask)
{
return security_ops->file_permission(file, mask);
@@ -712,6 +753,11 @@ int security_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
return security_ops->ipc_permission(ipcp, flag);
}
+void security_ipc_getsecid(struct kern_ipc_perm *ipcp, u32 *secid)
+{
+ security_ops->ipc_getsecid(ipcp, secid);
+}
+
int security_msg_msg_alloc(struct msg_msg *msg)
{
return security_ops->msg_msg_alloc_security(msg);
@@ -1111,3 +1157,28 @@ int security_key_permission(key_ref_t key_ref,
}
#endif /* CONFIG_KEYS */
+
+#ifdef CONFIG_AUDIT
+
+int security_audit_rule_init(u32 field, u32 op, char *rulestr, void **lsmrule)
+{
+ return security_ops->audit_rule_init(field, op, rulestr, lsmrule);
+}
+
+int security_audit_rule_known(struct audit_krule *krule)
+{
+ return security_ops->audit_rule_known(krule);
+}
+
+void security_audit_rule_free(void *lsmrule)
+{
+ security_ops->audit_rule_free(lsmrule);
+}
+
+int security_audit_rule_match(u32 secid, u32 field, u32 op, void *lsmrule,
+ struct audit_context *actx)
+{
+ return security_ops->audit_rule_match(secid, field, op, lsmrule, actx);
+}
+
+#endif /* CONFIG_AUDIT */