xserver git update 15/5/2010

1 files changed, 374 insertions, 374 deletions

diff --git a/xorg-server/Xext/xselinux_label.c b/xorg-server/Xext/xselinux_label.c
index 9b5023a53..76e537abe 100644
--- a/xorg-server/Xext/xselinux_label.c
+++ b/xorg-server/Xext/xselinux_label.c
@@ -1,374 +1,374 @@
-/************************************************************
-
-Author: Eamon Walsh <ewalsh@tycho.nsa.gov>
-
-Permission to use, copy, modify, distribute, and sell this software and its
-documentation for any purpose is hereby granted without fee, provided that
-this permission notice appear in supporting documentation.  This permission
-notice shall be included in all copies or substantial portions of the
-Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-********************************************************/
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <selinux/label.h>
-
-#include "registry.h"
-#include "xselinuxint.h"
-
-/* selection and property atom cache */
-typedef struct {
-    SELinuxObjectRec prp;
-    SELinuxObjectRec sel;
-} SELinuxAtomRec;
-
-/* dynamic array */
-typedef struct {
-    unsigned size;
-    void **array;
-} SELinuxArrayRec;
-
-/* labeling handle */
-static struct selabel_handle *label_hnd;
-
-/* Array of object classes indexed by resource type */
-SELinuxArrayRec arr_types;
-/* Array of event SIDs indexed by event type */
-SELinuxArrayRec arr_events;
-/* Array of property and selection SID structures */
-SELinuxArrayRec arr_atoms;
-
-/*
- * Dynamic array helpers
- */
-static void *
-SELinuxArrayGet(SELinuxArrayRec *rec, unsigned key)
-{
-    return (rec->size > key) ? rec->array[key] : 0;
-}
-
-static int
-SELinuxArraySet(SELinuxArrayRec *rec, unsigned key, void *val)
-{
-    if (key >= rec->size) {
-	/* Need to increase size of array */
-	rec->array = xrealloc(rec->array, (key + 1) * sizeof(val));
-	if (!rec->array)
-	    return FALSE;
-	memset(rec->array + rec->size, 0, (key - rec->size + 1) * sizeof(val));
-	rec->size = key + 1;
-    }
-
-    rec->array[key] = val;
-    return TRUE;
-}
-
-static void
-SELinuxArrayFree(SELinuxArrayRec *rec, int free_elements)
-{
-    if (free_elements) {
-	unsigned i = rec->size;
-	while (i)
-	    xfree(rec->array[--i]);
-    }
-
-    xfree(rec->array);
-    rec->size = 0;
-    rec->array = NULL;
-}
-
-/*
- * Looks up a name in the selection or property mappings
- */
-static int
-SELinuxAtomToSIDLookup(Atom atom, SELinuxObjectRec *obj, int map, int polymap)
-{
-    const char *name = NameForAtom(atom);
-    security_context_t ctx;
-    int rc = Success;
-
-    obj->poly = 1;
-
-    /* Look in the mappings of names to contexts */
-    if (selabel_lookup_raw(label_hnd, &ctx, name, map) == 0) {
-	obj->poly = 0;
-    } else if (errno != ENOENT) {
-	ErrorF("SELinux: a property label lookup failed!\n");
-	return BadValue;
-    } else if (selabel_lookup_raw(label_hnd, &ctx, name, polymap) < 0) {
-	ErrorF("SELinux: a property label lookup failed!\n");
-	return BadValue;
-    }
-
-    /* Get a SID for context */
-    if (avc_context_to_sid_raw(ctx, &obj->sid) < 0) {
-	ErrorF("SELinux: a context_to_SID_raw call failed!\n");
-	rc = BadAlloc;
-    }
-
-    freecon(ctx);
-    return rc;
-}
-
-/*
- * Looks up the SID corresponding to the given property or selection atom
- */
-int
-SELinuxAtomToSID(Atom atom, int prop, SELinuxObjectRec **obj_rtn)
-{
-    SELinuxAtomRec *rec;
-    SELinuxObjectRec *obj;
-    int rc, map, polymap;
-
-    rec = SELinuxArrayGet(&arr_atoms, atom);
-    if (!rec) {
-	rec = xcalloc(1, sizeof(SELinuxAtomRec));
-	if (!rec || !SELinuxArraySet(&arr_atoms, atom, rec))
-	    return BadAlloc;
-    }
-
-    if (prop) {
-	obj = &rec->prp;
-	map = SELABEL_X_PROP;
-	polymap = SELABEL_X_POLYPROP;
-    } else {
-	obj = &rec->sel;
-	map = SELABEL_X_SELN;
-	polymap = SELABEL_X_POLYSELN;
-    }
-
-    if (!obj->sid) {
-	rc = SELinuxAtomToSIDLookup(atom, obj, map, polymap);
-	if (rc != Success)
-	    goto out;
-    }
-
-    *obj_rtn = obj;
-    rc = Success;
-out:
-    return rc;
-}
-
-/*
- * Looks up a SID for a selection/subject pair
- */
-int
-SELinuxSelectionToSID(Atom selection, SELinuxSubjectRec *subj,
-		      security_id_t *sid_rtn, int *poly_rtn)
-{
-    int rc;
-    SELinuxObjectRec *obj;
-    security_id_t tsid;
-
-    /* Get the default context and polyinstantiation bit */
-    rc = SELinuxAtomToSID(selection, 0, &obj);
-    if (rc != Success)
-	return rc;
-
-    /* Check for an override context next */
-    if (subj->sel_use_sid) {
-	tsid = subj->sel_use_sid;
-	goto out;
-    }
-
-    tsid = obj->sid;
-
-    /* Polyinstantiate if necessary to obtain the final SID */
-    if (obj->poly && avc_compute_member(subj->sid, obj->sid,
-					SECCLASS_X_SELECTION, &tsid) < 0) {
-	ErrorF("SELinux: a compute_member call failed!\n");
-	return BadValue;
-    }
-out:
-    *sid_rtn = tsid;
-    if (poly_rtn)
-	*poly_rtn = obj->poly;
-    return Success;
-}
-
-/*
- * Looks up a SID for a property/subject pair
- */
-int
-SELinuxPropertyToSID(Atom property, SELinuxSubjectRec *subj,
-		     security_id_t *sid_rtn, int *poly_rtn)
-{
-    int rc;
-    SELinuxObjectRec *obj;
-    security_id_t tsid, tsid2;
-
-    /* Get the default context and polyinstantiation bit */
-    rc = SELinuxAtomToSID(property, 1, &obj);
-    if (rc != Success)
-	return rc;
-
-    /* Check for an override context next */
-    if (subj->prp_use_sid) {
-	tsid = subj->prp_use_sid;
-	goto out;
-    }
-
-    /* Perform a transition */
-    if (avc_compute_create(subj->sid, obj->sid,
-			   SECCLASS_X_PROPERTY, &tsid) < 0) {
-	ErrorF("SELinux: a compute_create call failed!\n");
-	return BadValue;
-    }
-
-    /* Polyinstantiate if necessary to obtain the final SID */
-    if (obj->poly) {
-	tsid2 = tsid;
-	if (avc_compute_member(subj->sid, tsid2,
-			       SECCLASS_X_PROPERTY, &tsid) < 0) {
-	    ErrorF("SELinux: a compute_member call failed!\n");
-	    return BadValue;
-	}
-    }
-out:
-    *sid_rtn = tsid;
-    if (poly_rtn)
-	*poly_rtn = obj->poly;
-    return Success;
-}
-
-/*
- * Looks up the SID corresponding to the given event type
- */
-int
-SELinuxEventToSID(unsigned type, security_id_t sid_of_window,
-		  SELinuxObjectRec *sid_return)
-{
-    const char *name = LookupEventName(type);
-    security_id_t sid;
-    security_context_t ctx;
-    type &= 127;
-
-    sid = SELinuxArrayGet(&arr_events, type);
-    if (!sid) {
-	/* Look in the mappings of event names to contexts */
-	if (selabel_lookup_raw(label_hnd, &ctx, name, SELABEL_X_EVENT) < 0) {
-	    ErrorF("SELinux: an event label lookup failed!\n");
-	    return BadValue;
-	}
-	/* Get a SID for context */
-	if (avc_context_to_sid_raw(ctx, &sid) < 0) {
-	    ErrorF("SELinux: a context_to_SID_raw call failed!\n");
-	    freecon(ctx);
-	    return BadAlloc;
-	}
-	freecon(ctx);
-	/* Cache the SID value */
-	if (!SELinuxArraySet(&arr_events, type, sid))
-	    return BadAlloc;
-    }
-
-    /* Perform a transition to obtain the final SID */
-    if (avc_compute_create(sid_of_window, sid, SECCLASS_X_EVENT,
-			   &sid_return->sid) < 0) {
-	ErrorF("SELinux: a compute_create call failed!\n");
-	return BadValue;
-    }
-
-    return Success;
-}
-
-int
-SELinuxExtensionToSID(const char *name, security_id_t *sid_rtn)
-{
-    security_context_t ctx;
-
-    /* Look in the mappings of extension names to contexts */
-    if (selabel_lookup_raw(label_hnd, &ctx, name, SELABEL_X_EXT) < 0) {
-	ErrorF("SELinux: a property label lookup failed!\n");
-	return BadValue;
-    }
-    /* Get a SID for context */
-    if (avc_context_to_sid_raw(ctx, sid_rtn) < 0) {
-	ErrorF("SELinux: a context_to_SID_raw call failed!\n");
-	freecon(ctx);
-	return BadAlloc;
-    }
-    freecon(ctx);
-    return Success;
-}
-
-/*
- * Returns the object class corresponding to the given resource type.
- */
-security_class_t
-SELinuxTypeToClass(RESTYPE type)
-{
-    void *tmp;
-
-    tmp = SELinuxArrayGet(&arr_types, type & TypeMask);
-    if (!tmp) {
-	unsigned long class = SECCLASS_X_RESOURCE;
-
-	if (type & RC_DRAWABLE)
-	    class = SECCLASS_X_DRAWABLE;
-	else if (type == RT_GC)
-	    class = SECCLASS_X_GC;
-	else if (type == RT_FONT)
-	    class = SECCLASS_X_FONT;
-	else if (type == RT_CURSOR)
-	    class = SECCLASS_X_CURSOR;
-	else if (type == RT_COLORMAP)
-	    class = SECCLASS_X_COLORMAP;
-	else {
-	    /* Need to do a string lookup */
-	    const char *str = LookupResourceName(type);
-	    if (!strcmp(str, "PICTURE"))
-		class = SECCLASS_X_DRAWABLE;
-	    else if (!strcmp(str, "GLYPHSET"))
-		class = SECCLASS_X_FONT;
-	}
-
-	tmp = (void *)class;
-	SELinuxArraySet(&arr_types, type & TypeMask, tmp);
-    }
-
-    return (security_class_t)(unsigned long)tmp;
-}
-
-security_context_t
-SELinuxDefaultClientLabel(void)
-{
-    security_context_t ctx;
-
-    if (selabel_lookup_raw(label_hnd, &ctx, "remote", SELABEL_X_CLIENT) < 0)
-	FatalError("SELinux: failed to look up remote-client context\n");
-
-    return ctx;
-}
-
-void
-SELinuxLabelInit(void)
-{
-    struct selinux_opt selabel_option = { SELABEL_OPT_VALIDATE, (char *)1 };
-
-    label_hnd = selabel_open(SELABEL_CTX_X, &selabel_option, 1);
-    if (!label_hnd)
-	FatalError("SELinux: Failed to open x_contexts mapping in policy\n");
-}
-
-void
-SELinuxLabelReset(void)
-{
-    selabel_close(label_hnd);
-    label_hnd = NULL;
-
-    /* Free local state */
-    SELinuxArrayFree(&arr_types, 0);
-    SELinuxArrayFree(&arr_events, 0);
-    SELinuxArrayFree(&arr_atoms, 1);
-}
+/************************************************************

+

+Author: Eamon Walsh <ewalsh@tycho.nsa.gov>

+

+Permission to use, copy, modify, distribute, and sell this software and its

+documentation for any purpose is hereby granted without fee, provided that

+this permission notice appear in supporting documentation.  This permission

+notice shall be included in all copies or substantial portions of the

+Software.

+

+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE

+AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

+

+********************************************************/

+

+#ifdef HAVE_DIX_CONFIG_H

+#include <dix-config.h>

+#endif

+

+#include <selinux/label.h>

+

+#include "registry.h"

+#include "xselinuxint.h"

+

+/* selection and property atom cache */

+typedef struct {

+    SELinuxObjectRec prp;

+    SELinuxObjectRec sel;

+} SELinuxAtomRec;

+

+/* dynamic array */

+typedef struct {

+    unsigned size;

+    void **array;

+} SELinuxArrayRec;

+

+/* labeling handle */

+static struct selabel_handle *label_hnd;

+

+/* Array of object classes indexed by resource type */

+SELinuxArrayRec arr_types;

+/* Array of event SIDs indexed by event type */

+SELinuxArrayRec arr_events;

+/* Array of property and selection SID structures */

+SELinuxArrayRec arr_atoms;

+

+/*

+ * Dynamic array helpers

+ */

+static void *

+SELinuxArrayGet(SELinuxArrayRec *rec, unsigned key)

+{

+    return (rec->size > key) ? rec->array[key] : 0;

+}

+

+static int

+SELinuxArraySet(SELinuxArrayRec *rec, unsigned key, void *val)

+{

+    if (key >= rec->size) {

+	/* Need to increase size of array */

+	rec->array = realloc(rec->array, (key + 1) * sizeof(val));

+	if (!rec->array)

+	    return FALSE;

+	memset(rec->array + rec->size, 0, (key - rec->size + 1) * sizeof(val));

+	rec->size = key + 1;

+    }

+

+    rec->array[key] = val;

+    return TRUE;

+}

+

+static void

+SELinuxArrayFree(SELinuxArrayRec *rec, int free_elements)

+{

+    if (free_elements) {

+	unsigned i = rec->size;

+	while (i)

+	    free(rec->array[--i]);

+    }

+

+    free(rec->array);

+    rec->size = 0;

+    rec->array = NULL;

+}

+

+/*

+ * Looks up a name in the selection or property mappings

+ */

+static int

+SELinuxAtomToSIDLookup(Atom atom, SELinuxObjectRec *obj, int map, int polymap)

+{

+    const char *name = NameForAtom(atom);

+    security_context_t ctx;

+    int rc = Success;

+

+    obj->poly = 1;

+

+    /* Look in the mappings of names to contexts */

+    if (selabel_lookup_raw(label_hnd, &ctx, name, map) == 0) {

+	obj->poly = 0;

+    } else if (errno != ENOENT) {

+	ErrorF("SELinux: a property label lookup failed!\n");

+	return BadValue;

+    } else if (selabel_lookup_raw(label_hnd, &ctx, name, polymap) < 0) {

+	ErrorF("SELinux: a property label lookup failed!\n");

+	return BadValue;

+    }

+

+    /* Get a SID for context */

+    if (avc_context_to_sid_raw(ctx, &obj->sid) < 0) {

+	ErrorF("SELinux: a context_to_SID_raw call failed!\n");

+	rc = BadAlloc;

+    }

+

+    freecon(ctx);

+    return rc;

+}

+

+/*

+ * Looks up the SID corresponding to the given property or selection atom

+ */

+int

+SELinuxAtomToSID(Atom atom, int prop, SELinuxObjectRec **obj_rtn)

+{

+    SELinuxAtomRec *rec;

+    SELinuxObjectRec *obj;

+    int rc, map, polymap;

+

+    rec = SELinuxArrayGet(&arr_atoms, atom);

+    if (!rec) {

+	rec = calloc(1, sizeof(SELinuxAtomRec));

+	if (!rec || !SELinuxArraySet(&arr_atoms, atom, rec))

+	    return BadAlloc;

+    }

+

+    if (prop) {

+	obj = &rec->prp;

+	map = SELABEL_X_PROP;

+	polymap = SELABEL_X_POLYPROP;

+    } else {

+	obj = &rec->sel;

+	map = SELABEL_X_SELN;

+	polymap = SELABEL_X_POLYSELN;

+    }

+

+    if (!obj->sid) {

+	rc = SELinuxAtomToSIDLookup(atom, obj, map, polymap);

+	if (rc != Success)

+	    goto out;

+    }

+

+    *obj_rtn = obj;

+    rc = Success;

+out:

+    return rc;

+}

+

+/*

+ * Looks up a SID for a selection/subject pair

+ */

+int

+SELinuxSelectionToSID(Atom selection, SELinuxSubjectRec *subj,

+		      security_id_t *sid_rtn, int *poly_rtn)

+{

+    int rc;

+    SELinuxObjectRec *obj;

+    security_id_t tsid;

+

+    /* Get the default context and polyinstantiation bit */

+    rc = SELinuxAtomToSID(selection, 0, &obj);

+    if (rc != Success)

+	return rc;

+

+    /* Check for an override context next */

+    if (subj->sel_use_sid) {

+	tsid = subj->sel_use_sid;

+	goto out;

+    }

+

+    tsid = obj->sid;

+

+    /* Polyinstantiate if necessary to obtain the final SID */

+    if (obj->poly && avc_compute_member(subj->sid, obj->sid,

+					SECCLASS_X_SELECTION, &tsid) < 0) {

+	ErrorF("SELinux: a compute_member call failed!\n");

+	return BadValue;

+    }

+out:

+    *sid_rtn = tsid;

+    if (poly_rtn)

+	*poly_rtn = obj->poly;

+    return Success;

+}

+

+/*

+ * Looks up a SID for a property/subject pair

+ */

+int

+SELinuxPropertyToSID(Atom property, SELinuxSubjectRec *subj,

+		     security_id_t *sid_rtn, int *poly_rtn)

+{

+    int rc;

+    SELinuxObjectRec *obj;

+    security_id_t tsid, tsid2;

+

+    /* Get the default context and polyinstantiation bit */

+    rc = SELinuxAtomToSID(property, 1, &obj);

+    if (rc != Success)

+	return rc;

+

+    /* Check for an override context next */

+    if (subj->prp_use_sid) {

+	tsid = subj->prp_use_sid;

+	goto out;

+    }

+

+    /* Perform a transition */

+    if (avc_compute_create(subj->sid, obj->sid,

+			   SECCLASS_X_PROPERTY, &tsid) < 0) {

+	ErrorF("SELinux: a compute_create call failed!\n");

+	return BadValue;

+    }

+

+    /* Polyinstantiate if necessary to obtain the final SID */

+    if (obj->poly) {

+	tsid2 = tsid;

+	if (avc_compute_member(subj->sid, tsid2,

+			       SECCLASS_X_PROPERTY, &tsid) < 0) {

+	    ErrorF("SELinux: a compute_member call failed!\n");

+	    return BadValue;

+	}

+    }

+out:

+    *sid_rtn = tsid;

+    if (poly_rtn)

+	*poly_rtn = obj->poly;

+    return Success;

+}

+

+/*

+ * Looks up the SID corresponding to the given event type

+ */

+int

+SELinuxEventToSID(unsigned type, security_id_t sid_of_window,

+		  SELinuxObjectRec *sid_return)

+{

+    const char *name = LookupEventName(type);

+    security_id_t sid;

+    security_context_t ctx;

+    type &= 127;

+

+    sid = SELinuxArrayGet(&arr_events, type);

+    if (!sid) {

+	/* Look in the mappings of event names to contexts */

+	if (selabel_lookup_raw(label_hnd, &ctx, name, SELABEL_X_EVENT) < 0) {

+	    ErrorF("SELinux: an event label lookup failed!\n");

+	    return BadValue;

+	}

+	/* Get a SID for context */

+	if (avc_context_to_sid_raw(ctx, &sid) < 0) {

+	    ErrorF("SELinux: a context_to_SID_raw call failed!\n");

+	    freecon(ctx);

+	    return BadAlloc;

+	}

+	freecon(ctx);

+	/* Cache the SID value */

+	if (!SELinuxArraySet(&arr_events, type, sid))

+	    return BadAlloc;

+    }

+

+    /* Perform a transition to obtain the final SID */

+    if (avc_compute_create(sid_of_window, sid, SECCLASS_X_EVENT,

+			   &sid_return->sid) < 0) {

+	ErrorF("SELinux: a compute_create call failed!\n");

+	return BadValue;

+    }

+

+    return Success;

+}

+

+int

+SELinuxExtensionToSID(const char *name, security_id_t *sid_rtn)

+{

+    security_context_t ctx;

+

+    /* Look in the mappings of extension names to contexts */

+    if (selabel_lookup_raw(label_hnd, &ctx, name, SELABEL_X_EXT) < 0) {

+	ErrorF("SELinux: a property label lookup failed!\n");

+	return BadValue;

+    }

+    /* Get a SID for context */

+    if (avc_context_to_sid_raw(ctx, sid_rtn) < 0) {

+	ErrorF("SELinux: a context_to_SID_raw call failed!\n");

+	freecon(ctx);

+	return BadAlloc;

+    }

+    freecon(ctx);

+    return Success;

+}

+

+/*

+ * Returns the object class corresponding to the given resource type.

+ */

+security_class_t

+SELinuxTypeToClass(RESTYPE type)

+{

+    void *tmp;

+

+    tmp = SELinuxArrayGet(&arr_types, type & TypeMask);

+    if (!tmp) {

+	unsigned long class = SECCLASS_X_RESOURCE;

+

+	if (type & RC_DRAWABLE)

+	    class = SECCLASS_X_DRAWABLE;

+	else if (type == RT_GC)

+	    class = SECCLASS_X_GC;

+	else if (type == RT_FONT)

+	    class = SECCLASS_X_FONT;

+	else if (type == RT_CURSOR)

+	    class = SECCLASS_X_CURSOR;

+	else if (type == RT_COLORMAP)

+	    class = SECCLASS_X_COLORMAP;

+	else {

+	    /* Need to do a string lookup */

+	    const char *str = LookupResourceName(type);

+	    if (!strcmp(str, "PICTURE"))

+		class = SECCLASS_X_DRAWABLE;

+	    else if (!strcmp(str, "GLYPHSET"))

+		class = SECCLASS_X_FONT;

+	}

+

+	tmp = (void *)class;

+	SELinuxArraySet(&arr_types, type & TypeMask, tmp);

+    }

+

+    return (security_class_t)(unsigned long)tmp;

+}

+

+security_context_t

+SELinuxDefaultClientLabel(void)

+{

+    security_context_t ctx;

+

+    if (selabel_lookup_raw(label_hnd, &ctx, "remote", SELABEL_X_CLIENT) < 0)

+	FatalError("SELinux: failed to look up remote-client context\n");

+

+    return ctx;

+}

+

+void

+SELinuxLabelInit(void)

+{

+    struct selinux_opt selabel_option = { SELABEL_OPT_VALIDATE, (char *)1 };

+

+    label_hnd = selabel_open(SELABEL_CTX_X, &selabel_option, 1);

+    if (!label_hnd)

+	FatalError("SELinux: Failed to open x_contexts mapping in policy\n");

+}

+

+void

+SELinuxLabelReset(void)

+{

+    selabel_close(label_hnd);

+    label_hnd = NULL;

+

+    /* Free local state */

+    SELinuxArrayFree(&arr_types, 0);

+    SELinuxArrayFree(&arr_events, 0);

+    SELinuxArrayFree(&arr_atoms, 1);

+}