492 lines
16 KiB
Diff
492 lines
16 KiB
Diff
diff --git a/libselinux/include/selinux/selinux.h b/libselinux/include/selinux/selinux.h
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index a4079aa..80ba628 100644
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--- a/libselinux/include/selinux/selinux.h
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+++ b/libselinux/include/selinux/selinux.h
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@@ -177,6 +177,7 @@ extern void selinux_set_callback(int type, union selinux_callback cb);
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#define SELINUX_WARNING 1
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#define SELINUX_INFO 2
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#define SELINUX_AVC 3
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+#define SELINUX_TRANS_DIR "/var/run/setrans"
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/* Compute an access decision. */
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extern int security_compute_av(const security_context_t scon,
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@@ -498,6 +499,7 @@ extern const char *selinux_policy_root(void);
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/* These functions return the paths to specific files under the
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policy root directory. */
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+extern const char *selinux_current_policy_path(void);
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extern const char *selinux_binary_policy_path(void);
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extern const char *selinux_failsafe_context_path(void);
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extern const char *selinux_removable_context_path(void);
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diff --git a/libselinux/man/man3/security_compute_av.3 b/libselinux/man/man3/security_compute_av.3
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index c6837fc..de62d26 100644
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--- a/libselinux/man/man3/security_compute_av.3
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+++ b/libselinux/man/man3/security_compute_av.3
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@@ -37,9 +37,9 @@ the SELinux policy database in the kernel
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.sp
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.BI "int security_compute_user_raw(security_context_t "scon ", const char *" username ", security_context_t **" con );
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.sp
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-.BI "int security_get_initial_context(const char *" name ", security_context_t " con );
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+.BI "int security_get_initial_context(const char *" name ", security_context_t *" con );
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.sp
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-.BI "int security_get_initial_context_raw(const char *" name ", security_context_t " con );
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+.BI "int security_get_initial_context_raw(const char *" name ", security_context_t *" con );
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.sp
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.BI "int selinux_check_access(const security_context_t " scon ", const security_context_t " tcon ", const char *" class ", const char *" perm ", void *" auditdata);
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.sp
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diff --git a/libselinux/man/man3/selinux_binary_policy_path.3 b/libselinux/man/man3/selinux_binary_policy_path.3
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index ec97dcf..503c52c 100644
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--- a/libselinux/man/man3/selinux_binary_policy_path.3
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+++ b/libselinux/man/man3/selinux_binary_policy_path.3
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@@ -1,6 +1,6 @@
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.TH "selinux_binary_policy_path" "3" "15 November 2004" "dwalsh@redhat.com" "SELinux API Documentation"
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.SH "NAME"
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-selinux_path, selinux_policy_root, selinux_binary_policy_path,
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+selinux_path, selinux_policy_root, selinux_binary_policy_path, selinux_current_policy_path,
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selinux_failsafe_context_path, selinux_removable_context_path,
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selinux_default_context_path, selinux_user_contexts_path,
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selinux_file_context_path, selinux_media_context_path,
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@@ -17,6 +17,8 @@ directories and files
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.sp
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.B const char *selinux_binary_policy_path(void);
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.sp
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+.B const char *selinux_current_policy_path(void);
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+.sp
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.B const char *selinux_failsafe_context_path(void);
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.sp
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.B const char *selinux_removable_context_path(void);
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@@ -55,6 +57,9 @@ returns the top-level policy directory.
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.BR selinux_binary_policy_path ()
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returns the binary policy file loaded into kernel.
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.sp
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+.BR selinux_current_policy_path ()
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+returns the currently loaded policy file from the kernel.
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+.sp
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.BR selinux_default_type_path ()
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returns the context file mapping roles to default types.
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.sp
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diff --git a/libselinux/man/man3/selinux_current_policy_path.3 b/libselinux/man/man3/selinux_current_policy_path.3
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new file mode 100644
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index 0000000..175a611
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--- /dev/null
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+++ b/libselinux/man/man3/selinux_current_policy_path.3
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@@ -0,0 +1 @@
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+.so man3/selinux_binary_policy_path.3
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diff --git a/libselinux/man/man8/selinux.8 b/libselinux/man/man8/selinux.8
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index a328866..50868e4 100644
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--- a/libselinux/man/man8/selinux.8
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+++ b/libselinux/man/man8/selinux.8
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@@ -37,20 +37,22 @@ The
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configuration file also controls what policy
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is active on the system. SELinux allows for multiple policies to be
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installed on the system, but only one policy may be active at any
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-given time. At present, two kinds of SELinux policy exist: targeted
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-and strict. The targeted policy is designed as a policy where most
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-processes operate without restrictions, and only specific services are
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+given time. At present, multiple kinds of SELinux policy exist: targeted,
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+mls for example. The targeted policy is designed as a policy where most
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+user processes operate without restrictions, and only specific services are
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placed into distinct security domains that are confined by the policy.
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For example, the user would run in a completely unconfined domain
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while the named daemon or apache daemon would run in a specific domain
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-tailored to its operation. The strict policy is designed as a policy
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-where all processes are partitioned into fine-grained security domains
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-and confined by policy. It is anticipated in the future that other
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-policies will be created (Multi-Level Security for example). You can
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+tailored to its operation. The MLS (Multi-Level Security) policy is designed
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+as a policy where all processes are partitioned into fine-grained security
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+domains and confined by policy. MLS also supports the Bell And LaPadula model, where processes are not only confined by the type but also the level of the data.
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+
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+You can
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define which policy you will run by setting the
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.B SELINUXTYPE
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environment variable within
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.IR /etc/selinux/config .
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+You must reboot and possibly relabel if you change the policy type to have it take effect on the system.
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The corresponding
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policy configuration for each such policy must be installed in the
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.I /etc/selinux/{SELINUXTYPE}/
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@@ -58,7 +60,7 @@ directories.
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A given SELinux policy can be customized further based on a set of
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compile-time tunable options and a set of runtime policy booleans.
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-.B \%system\-config\-securitylevel
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+.B \%system\-config\-selinux
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allows customization of these booleans and tunables.
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Many domains that are protected by SELinux also include SELinux man pages explaining how to customize their policy.
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@@ -86,11 +88,13 @@ This manual page was written by Dan Walsh <dwalsh@redhat.com>.
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.nh
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.BR booleans (8),
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.BR setsebool (8),
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-.BR selinuxenabled (8),
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+.BR sepolicy (8),
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+.BR system-config-selinux (8),
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.BR togglesebool (8),
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.BR restorecon (8),
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+.BR fixfiles (8),
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.BR setfiles (8),
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-.BR semange (8),
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+.BR semanage (8),
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.BR sepolicy(8)
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Every confined service on the system has a man page in the following format:
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diff --git a/libselinux/src/audit2why.c b/libselinux/src/audit2why.c
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index ffe381b..560bc25 100644
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--- a/libselinux/src/audit2why.c
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+++ b/libselinux/src/audit2why.c
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@@ -210,27 +210,12 @@ static int __policy_init(const char *init_path)
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return 1;
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}
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} else {
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- vers = sepol_policy_kern_vers_max();
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- if (vers < 0) {
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- snprintf(errormsg, sizeof(errormsg),
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- "Could not get policy version: %s\n",
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- strerror(errno));
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- PyErr_SetString( PyExc_ValueError, errormsg);
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- return 1;
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- }
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- snprintf(path, PATH_MAX, "%s.%d",
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- selinux_binary_policy_path(), vers);
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- fp = fopen(path, "r");
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- while (!fp && errno == ENOENT && --vers) {
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- snprintf(path, PATH_MAX, "%s.%d",
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- selinux_binary_policy_path(), vers);
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- fp = fopen(path, "r");
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- }
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+ fp = fopen(selinux_current_policy_path(), "r");
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if (!fp) {
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snprintf(errormsg, sizeof(errormsg),
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- "unable to open %s.%d: %s\n",
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- selinux_binary_policy_path(),
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- security_policyvers(), strerror(errno));
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+ "unable to open %s: %s\n",
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+ selinux_current_policy_path(),
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+ strerror(errno));
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PyErr_SetString( PyExc_ValueError, errormsg);
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return 1;
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}
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@@ -310,10 +295,12 @@ static PyObject *init(PyObject *self __attribute__((unused)), PyObject *args) {
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}
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#define RETURN(X) \
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- PyTuple_SetItem(result, 0, Py_BuildValue("i", X)); \
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- return result;
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+ { \
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+ return Py_BuildValue("iO", (X), Py_None); \
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+ }
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static PyObject *analyze(PyObject *self __attribute__((unused)) , PyObject *args) {
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+ char *reason_buf = NULL;
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security_context_t scon;
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security_context_t tcon;
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char *tclassstr;
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@@ -328,10 +315,6 @@ static PyObject *analyze(PyObject *self __attribute__((unused)) , PyObject *args
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struct sepol_av_decision avd;
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int rc;
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int i=0;
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- PyObject *result = PyTuple_New(2);
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- if (!result) return NULL;
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- Py_INCREF(Py_None);
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- PyTuple_SetItem(result, 1, Py_None);
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if (!PyArg_ParseTuple(args,(char *)"sssO!:audit2why",&scon,&tcon,&tclassstr,&PyList_Type, &listObj))
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return NULL;
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@@ -342,22 +325,21 @@ static PyObject *analyze(PyObject *self __attribute__((unused)) , PyObject *args
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/* should raise an error here. */
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if (numlines < 0) return NULL; /* Not a list */
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- if (!avc) {
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+ if (!avc)
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RETURN(NOPOLICY)
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- }
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rc = sepol_context_to_sid(scon, strlen(scon) + 1, &ssid);
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- if (rc < 0) {
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+ if (rc < 0)
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RETURN(BADSCON)
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- }
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+
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rc = sepol_context_to_sid(tcon, strlen(tcon) + 1, &tsid);
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- if (rc < 0) {
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+ if (rc < 0)
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RETURN(BADTCON)
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- }
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+
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tclass = string_to_security_class(tclassstr);
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- if (!tclass) {
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+ if (!tclass)
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RETURN(BADTCLASS)
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- }
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+
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/* Convert the permission list to an AV. */
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av = 0;
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@@ -377,21 +359,20 @@ static PyObject *analyze(PyObject *self __attribute__((unused)) , PyObject *args
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#endif
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perm = string_to_av_perm(tclass, permstr);
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- if (!perm) {
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+ if (!perm)
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RETURN(BADPERM)
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- }
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+
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av |= perm;
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}
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/* Reproduce the computation. */
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- rc = sepol_compute_av_reason(ssid, tsid, tclass, av, &avd, &reason);
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- if (rc < 0) {
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+ rc = sepol_compute_av_reason_buffer(ssid, tsid, tclass, av, &avd, &reason, &reason_buf, 0);
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+ if (rc < 0)
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RETURN(BADCOMPUTE)
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- }
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- if (!reason) {
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+ if (!reason)
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RETURN(ALLOW)
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- }
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+
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if (reason & SEPOL_COMPUTEAV_TE) {
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avc->ssid = ssid;
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avc->tsid = tsid;
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@@ -404,28 +385,34 @@ static PyObject *analyze(PyObject *self __attribute__((unused)) , PyObject *args
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RETURN(TERULE)
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}
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} else {
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- PyTuple_SetItem(result, 0, Py_BuildValue("i", BOOLEAN));
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+ PyObject *outboollist;
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struct boolean_t *b = bools;
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int len=0;
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while (b->name) {
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len++; b++;
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}
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b = bools;
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- PyObject *outboollist = PyTuple_New(len);
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+ outboollist = PyList_New(len);
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len=0;
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while(b->name) {
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- PyObject *bool = Py_BuildValue("(si)", b->name, b->active);
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- PyTuple_SetItem(outboollist, len++, bool);
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+ PyObject *bool_ = Py_BuildValue("(si)", b->name, b->active);
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+ PyList_SetItem(outboollist, len++, bool_);
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b++;
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}
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free(bools);
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- PyTuple_SetItem(result, 1, outboollist);
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- return result;
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+ /* 'N' steals the reference to outboollist */
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+ return Py_BuildValue("iN", BOOLEAN, outboollist);
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}
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}
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if (reason & SEPOL_COMPUTEAV_CONS) {
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- RETURN(CONSTRAINT);
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+ if (reason_buf) {
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+ PyObject *result = NULL;
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+ result = Py_BuildValue("is", CONSTRAINT, reason_buf);
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+ free(reason_buf);
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+ return result;
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+ }
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+ RETURN(CONSTRAINT)
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}
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if (reason & SEPOL_COMPUTEAV_RBAC)
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diff --git a/libselinux/src/avc.c b/libselinux/src/avc.c
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index 802a07f..6ff83a7 100644
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--- a/libselinux/src/avc.c
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+++ b/libselinux/src/avc.c
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@@ -827,6 +827,7 @@ int avc_has_perm(security_id_t ssid, security_id_t tsid,
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errsave = errno;
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avc_audit(ssid, tsid, tclass, requested, &avd, rc, auditdata);
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errno = errsave;
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+ if (!avc_enforcing) return 0;
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return rc;
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}
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diff --git a/libselinux/src/get_context_list.c b/libselinux/src/get_context_list.c
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index b9e8002..355730a 100644
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--- a/libselinux/src/get_context_list.c
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+++ b/libselinux/src/get_context_list.c
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@@ -426,7 +426,7 @@ int get_ordered_context_list(const char *user,
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/* Initialize ordering array. */
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ordering = malloc(nreach * sizeof(unsigned int));
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if (!ordering)
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- goto oom_order;
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+ goto failsafe;
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for (i = 0; i < nreach; i++)
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ordering[i] = nreach;
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@@ -435,7 +435,7 @@ int get_ordered_context_list(const char *user,
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fname_len = strlen(user_contexts_path) + strlen(user) + 2;
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fname = malloc(fname_len);
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if (!fname)
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- goto oom_order;
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+ goto failsafe;
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snprintf(fname, fname_len, "%s%s", user_contexts_path, user);
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fp = fopen(fname, "r");
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if (fp) {
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@@ -465,31 +465,28 @@ int get_ordered_context_list(const char *user,
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}
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}
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+ if (!nordered)
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+ goto failsafe;
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+
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/* Apply the ordering. */
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- if (nordered) {
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- co = malloc(nreach * sizeof(struct context_order));
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- if (!co)
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- goto oom_order;
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- for (i = 0; i < nreach; i++) {
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- co[i].con = reachable[i];
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- co[i].order = ordering[i];
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- }
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- qsort(co, nreach, sizeof(struct context_order), order_compare);
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- for (i = 0; i < nreach; i++)
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- reachable[i] = co[i].con;
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- free(co);
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+ co = malloc(nreach * sizeof(struct context_order));
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+ if (!co)
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+ goto failsafe;
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+ for (i = 0; i < nreach; i++) {
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+ co[i].con = reachable[i];
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+ co[i].order = ordering[i];
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}
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+ qsort(co, nreach, sizeof(struct context_order), order_compare);
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+ for (i = 0; i < nreach; i++)
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+ reachable[i] = co[i].con;
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+ free(co);
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- /* Return the ordered list.
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- If we successfully ordered it, then only report the ordered entries
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- to the caller. Otherwise, fall back to the entire reachable list. */
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- if (nordered && nordered < nreach) {
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+ /* Only report the ordered entries to the caller. */
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+ if (nordered < nreach) {
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for (i = nordered; i < nreach; i++)
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free(reachable[i]);
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reachable[nordered] = NULL;
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rc = nordered;
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- } else {
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- rc = nreach;
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}
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out:
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@@ -523,14 +520,6 @@ int get_ordered_context_list(const char *user,
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}
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rc = 1; /* one context in the list */
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goto out;
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-
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- oom_order:
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- /* Unable to order context list due to OOM condition.
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- Fall back to unordered reachable context list. */
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- fprintf(stderr, "%s: out of memory, unable to order list\n",
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- __FUNCTION__);
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- rc = nreach;
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- goto out;
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}
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|
|
|
hidden_def(get_ordered_context_list)
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|
diff --git a/libselinux/src/matchpathcon.c b/libselinux/src/matchpathcon.c
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index 2d7369e..2a00807 100644
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--- a/libselinux/src/matchpathcon.c
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+++ b/libselinux/src/matchpathcon.c
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@@ -2,6 +2,7 @@
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#include <string.h>
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#include <errno.h>
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#include <stdio.h>
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+#include <syslog.h>
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#include "selinux_internal.h"
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#include "label_internal.h"
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#include "callbacks.h"
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@@ -62,7 +63,7 @@ static void
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{
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va_list ap;
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va_start(ap, fmt);
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- vfprintf(stderr, fmt, ap);
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+ vsyslog(LOG_ERR, fmt, ap);
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va_end(ap);
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}
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diff --git a/libselinux/src/procattr.c b/libselinux/src/procattr.c
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index 6c5b45a..0a0dd3e 100644
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--- a/libselinux/src/procattr.c
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+++ b/libselinux/src/procattr.c
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@@ -257,6 +257,7 @@ out:
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free(context);
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return -1;
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} else {
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+ free(*prev_context);
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*prev_context = context;
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return 0;
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}
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diff --git a/libselinux/src/selinux_config.c b/libselinux/src/selinux_config.c
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index 296f357..4913c55 100644
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--- a/libselinux/src/selinux_config.c
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+++ b/libselinux/src/selinux_config.c
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@@ -8,6 +8,7 @@
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#include <limits.h>
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#include <unistd.h>
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#include <pthread.h>
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+#include "policy.h"
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#include "selinux_internal.h"
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#include "get_default_type_internal.h"
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@@ -303,6 +304,29 @@ const char *selinux_binary_policy_path(void)
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hidden_def(selinux_binary_policy_path)
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+const char *selinux_current_policy_path(void)
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+{
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+ int rc = 0;
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+ int vers = 0;
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+ static char policy_path[PATH_MAX];
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+
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+ snprintf(policy_path, sizeof(policy_path), "%s/policy", selinux_mnt);
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+ if (access(policy_path, F_OK) != 0 ) {
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+ vers = security_policyvers();
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+ do {
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+ /* Check prior versions to see if old policy is available */
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+ snprintf(policy_path, sizeof(policy_path), "%s.%d",
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+ selinux_binary_policy_path(), vers);
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+ } while ((rc = access(policy_path, F_OK)) && --vers > 0);
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+
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+ if (rc) return NULL;
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+ }
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+
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+ return policy_path;
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+}
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+
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+hidden_def(selinux_current_policy_path)
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+
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const char *selinux_file_context_path(void)
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{
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return get_path(FILE_CONTEXTS);
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diff --git a/libselinux/src/selinux_internal.h b/libselinux/src/selinux_internal.h
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index 2c7c85c..4a4aebc 100644
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--- a/libselinux/src/selinux_internal.h
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+++ b/libselinux/src/selinux_internal.h
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@@ -60,6 +60,7 @@ hidden_proto(selinux_mkload_policy)
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hidden_proto(security_setenforce)
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hidden_proto(security_deny_unknown)
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hidden_proto(selinux_boolean_sub)
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+ hidden_proto(selinux_current_policy_path)
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hidden_proto(selinux_binary_policy_path)
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hidden_proto(selinux_booleans_subs_path)
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hidden_proto(selinux_default_context_path)
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diff --git a/libselinux/src/setrans_internal.h b/libselinux/src/setrans_internal.h
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index a801ee8..b3bdca2 100644
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--- a/libselinux/src/setrans_internal.h
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+++ b/libselinux/src/setrans_internal.h
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@@ -1,6 +1,7 @@
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/* Author: Trusted Computer Solutions, Inc. */
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+#include <selinux/selinux.h>
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-#define SETRANS_UNIX_SOCKET "/var/run/setrans/.setrans-unix"
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+#define SETRANS_UNIX_SOCKET SELINUX_TRANS_DIR "/.setrans-unix"
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#define RAW_TO_TRANS_CONTEXT 2
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#define TRANS_TO_RAW_CONTEXT 3
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