Add selinux_check_access function. Needed for passwd, chfn, chsh
This commit is contained in:
Dan Walsh
parent
3f542ebbed
commit
a8fa8756a9
|
|
@ -1,3 +1,33 @@
|
|||
diff --git a/libselinux/include/selinux/selinux.h b/libselinux/include/selinux/selinux.h
|
||||
index d29b0c1..792e68e 100644
|
||||
--- a/libselinux/include/selinux/selinux.h
|
||||
+++ b/libselinux/include/selinux/selinux.h
|
||||
@@ -500,6 +500,25 @@ extern const char *selinux_colors_path(void);
|
||||
extern const char *selinux_netfilter_context_path(void);
|
||||
extern const char *selinux_path(void);
|
||||
|
||||
+/**
|
||||
+ * selinux_check_access - Check permissions and perform appropriate auditing.
|
||||
+ * @scon: source security context
|
||||
+ * @tcon: target security context
|
||||
+ * @tclass: target security class string
|
||||
+ * @perm: requested permissions string, interpreted based on @tclass
|
||||
+ * @auditdata: auxiliary audit data
|
||||
+ *
|
||||
+ * Check the AVC to determine whether the @perm permissions are granted
|
||||
+ * for the SID pair (@scon, @tcon), interpreting the permissions
|
||||
+ * based on @tclass.
|
||||
+ * Return %0 if all @perm permissions are granted, -%1 with
|
||||
+ * @errno set to %EACCES if any permissions are denied or to another
|
||||
+ * value upon other errors.
|
||||
+ * If auditing or logging is configured the appropriate callbacks will be called
|
||||
+ * and passed the auditdata field
|
||||
+ */
|
||||
+extern int selinux_check_access(const security_context_t scon, const security_context_t tcon, const char *tclass, const char *perm, void *auditdata);
|
||||
+
|
||||
/* Check a permission in the passwd class.
|
||||
Return 0 if granted or -1 otherwise. */
|
||||
extern int selinux_check_passwd_access(access_vector_t requested);
|
||||
diff --git a/libselinux/man/man3/matchpathcon.3 b/libselinux/man/man3/matchpathcon.3
|
||||
index cdbb252..e2a4371 100644
|
||||
--- a/libselinux/man/man3/matchpathcon.3
|
||||
|
|
@ -20,6 +50,29 @@ index cdbb252..e2a4371 100644
|
|||
.sp
|
||||
.B matchpathcon_fini
|
||||
frees the memory allocated by a prior call to
|
||||
diff --git a/libselinux/man/man3/security_compute_av.3 b/libselinux/man/man3/security_compute_av.3
|
||||
index f2d9f30..1e36952 100644
|
||||
--- a/libselinux/man/man3/security_compute_av.3
|
||||
+++ b/libselinux/man/man3/security_compute_av.3
|
||||
@@ -24,6 +24,8 @@ the SELinux policy database in the kernel.
|
||||
.BI "int security_get_initial_context(const char *" name ", security_context_t
|
||||
"con );
|
||||
.sp
|
||||
+.BI "int selinux_check_access(const security_context_t " scon, " const security_context_t " tcon, " const char *" class, " const char *" perm, "void *" auditdata);
|
||||
+.sp
|
||||
.BI "int selinux_check_passwd_access(access_vector_t " requested );
|
||||
.sp
|
||||
.BI "int checkPasswdAccess(access_vector_t " requested );
|
||||
@@ -74,6 +76,9 @@ source context. It is mainly used by
|
||||
is used to get the context of a kernel initial security identifier specified by
|
||||
.I name
|
||||
|
||||
+.B selinux_check_access
|
||||
+is used to check if the source context has the access permission for the specified class on the target context.
|
||||
+
|
||||
.B selinux_check_passwd_access
|
||||
is used to check for a permission in the
|
||||
.I passwd
|
||||
diff --git a/libselinux/man/man3/selabel_open.3 b/libselinux/man/man3/selabel_open.3
|
||||
index 8674e37..89bb4d3 100644
|
||||
--- a/libselinux/man/man3/selabel_open.3
|
||||
|
|
@ -43,6 +96,27 @@ index 8674e37..89bb4d3 100644
|
|||
.BR selinux_set_callback (3),
|
||||
.BR selinux (8)
|
||||
-
|
||||
diff --git a/libselinux/man/man3/selinux_check_access.3 b/libselinux/man/man3/selinux_check_access.3
|
||||
new file mode 100644
|
||||
index 0000000..a60bca4
|
||||
--- /dev/null
|
||||
+++ b/libselinux/man/man3/selinux_check_access.3
|
||||
@@ -0,0 +1 @@
|
||||
+.so man3/security_compute_av.3
|
||||
diff --git a/libselinux/src/avc.c b/libselinux/src/avc.c
|
||||
index 74591b4..e7ad31d 100644
|
||||
--- a/libselinux/src/avc.c
|
||||
+++ b/libselinux/src/avc.c
|
||||
@@ -165,6 +165,9 @@ int avc_init(const char *prefix,
|
||||
struct avc_node *new;
|
||||
int i, rc = 0;
|
||||
|
||||
+ if (avc_running)
|
||||
+ return 0;
|
||||
+
|
||||
if (prefix)
|
||||
strncpy(avc_prefix, prefix, AVC_PREFIX_SIZE - 1);
|
||||
|
||||
diff --git a/libselinux/src/callbacks.c b/libselinux/src/callbacks.c
|
||||
index b245364..7c47222 100644
|
||||
--- a/libselinux/src/callbacks.c
|
||||
|
|
@ -55,6 +129,51 @@ index b245364..7c47222 100644
|
|||
va_start(ap, fmt);
|
||||
rc = vfprintf(stderr, fmt, ap);
|
||||
va_end(ap);
|
||||
diff --git a/libselinux/src/checkAccess.c b/libselinux/src/checkAccess.c
|
||||
index c1982c7..37ccc15 100644
|
||||
--- a/libselinux/src/checkAccess.c
|
||||
+++ b/libselinux/src/checkAccess.c
|
||||
@@ -4,8 +4,40 @@
|
||||
#include <errno.h>
|
||||
#include "selinux_internal.h"
|
||||
#include <selinux/flask.h>
|
||||
+#include <selinux/avc.h>
|
||||
#include <selinux/av_permissions.h>
|
||||
|
||||
+static pthread_once_t once = PTHREAD_ONCE_INIT;
|
||||
+
|
||||
+static void avc_init_once(void)
|
||||
+{
|
||||
+ avc_open(NULL, 0);
|
||||
+}
|
||||
+
|
||||
+int selinux_check_access(const security_context_t scon, const security_context_t tcon, const char *class, const char *perm, void *aux) {
|
||||
+ int status = -1;
|
||||
+ int rc = -1;
|
||||
+ security_id_t scon_id;
|
||||
+ security_id_t tcon_id;
|
||||
+ security_class_t sclass;
|
||||
+ access_vector_t av;
|
||||
+
|
||||
+ if (is_selinux_enabled() == 0)
|
||||
+ return 0;
|
||||
+
|
||||
+ __selinux_once(once, avc_init_once);
|
||||
+
|
||||
+ if ((rc = avc_context_to_sid(scon, &scon_id)) < 0) return rc;
|
||||
+
|
||||
+ if ((rc = avc_context_to_sid(tcon, &tcon_id)) < 0) return rc;
|
||||
+
|
||||
+ if ((sclass = string_to_security_class(class)) == 0) return status;
|
||||
+
|
||||
+ if ((av = string_to_av_perm(sclass, perm)) == 0) return status;
|
||||
+
|
||||
+ return (avc_has_perm (scon_id, tcon_id, sclass, av, NULL, aux);
|
||||
+}
|
||||
+
|
||||
int selinux_check_passwd_access(access_vector_t requested)
|
||||
{
|
||||
int status = -1;
|
||||
diff --git a/libselinux/src/label_file.c b/libselinux/src/label_file.c
|
||||
index 3b8346d..02f3f98 100644
|
||||
--- a/libselinux/src/label_file.c
|
||||
|
|
|
|||
|
|
@ -7,7 +7,7 @@
|
|||
Summary: SELinux library and simple utilities
|
||||
Name: libselinux
|
||||
Version: 2.1.6
|
||||
Release: 2%{?dist}
|
||||
Release: 3%{?dist}
|
||||
License: Public Domain
|
||||
Group: System Environment/Libraries
|
||||
Source: %{name}-%{version}.tgz
|
||||
|
|
@ -231,6 +231,9 @@ rm -rf %{buildroot}
|
|||
%{ruby_sitearch}/selinux.so
|
||||
|
||||
%changelog
|
||||
* Wed Oct 19 2011 Dan Walsh <dwalsh@redhat.com> - 2.1.6-3
|
||||
- Add selinux_check_access function. Needed for passwd, chfn, chsh
|
||||
|
||||
* Thu Sep 22 2011 Dan Walsh <dwalsh@redhat.com> - 2.1.6-2
|
||||
- Handle situation where selinux=0 passed to the kernel and both /selinux and
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue