X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/2d21ac55c334faf3a56e5634905ed6987fc787d4..3903760236c30e3b5ace7a4eefac3a269d68957c:/security/mac_process.c

diff --git a/security/mac_process.c b/security/mac_process.c
index 20ca2fb64..193507f5d 100644
--- a/security/mac_process.c
+++ b/security/mac_process.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2007-2010 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -72,10 +72,13 @@
 #include <sys/proc_internal.h>
 #include <sys/kauth.h>
 #include <sys/imgact.h>
+#include <mach/mach_types.h>
+#include <kern/task.h>
 
 #include <security/mac_internal.h>
+#include <security/mac_mach_internal.h>
 
-#include <bsd/bsm/audit_kernel.h>
+#include <bsd/security/audit/audit.h>
 
 struct label *
 mac_cred_label_alloc(void)
@@ -102,6 +105,12 @@ mac_cred_label_free(struct label *label)
 	mac_labelzone_free(label);
 }
 
+int
+mac_cred_label_compare(struct label *a, struct label *b)
+{
+	return (bcmp(a, b, sizeof (*a)) == 0);
+}
+
 int
 mac_cred_label_externalize_audit(struct proc *p, struct mac *mac)
 {
@@ -205,12 +214,15 @@ mac_execve_enter(user_addr_t mac_p, struct image_params *imgp)
 		return (0);
 
 	if (IS_64BIT_PROCESS(current_proc())) {
-		error = copyin(mac_p, &mac, sizeof(mac));
+		struct user64_mac mac64;
+		error = copyin(mac_p, &mac64, sizeof(mac64));
+		mac.m_buflen = mac64.m_buflen;
+		mac.m_string = mac64.m_string;
 	} else {
-		struct mac mac32;
+		struct user32_mac mac32;
 		error = copyin(mac_p, &mac32, sizeof(mac32));
 		mac.m_buflen = mac32.m_buflen;
-		mac.m_string = CAST_USER_ADDR_T(mac32.m_string);
+		mac.m_string = mac32.m_string;
 	}
 	if (error)
 		return (error);
@@ -241,13 +253,17 @@ out:
  * When the subject's label changes, it may require revocation of privilege
  * to mapped objects.  This can't be done on-the-fly later with a unified
  * buffer cache.
+ *
+ * XXX:		CRF_MAC_ENFORCE should be in a kauth_cred_t field, rather
+ * XXX:		than a posix_cred_t field.
  */
 void
 mac_cred_label_update(kauth_cred_t cred, struct label *newlabel)
 {
+	posix_cred_t pcred = posix_cred_get(cred);
 
 	/* force label to be part of "matching" for credential */
-	cred->cr_flags |= CRF_MAC_ENFORCE;
+	pcred->cr_flags |= CRF_MAC_ENFORCE;
 
 	/* inform the policies of the update */
 	MAC_PERFORM(cred_label_update, cred, newlabel);
@@ -258,8 +274,11 @@ mac_cred_check_label_update(kauth_cred_t cred, struct label *newlabel)
 {
 	int error;
 
-	if (!mac_proc_enforce)
-		return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+    /* 21167099 - only check if we allow write */
+    if (!mac_proc_enforce)
+        return 0;
+#endif
 
 	MAC_CHECK(cred_check_label_update, cred, newlabel);
 
@@ -271,16 +290,14 @@ mac_cred_check_visible(kauth_cred_t u1, kauth_cred_t u2)
 {
 	int error;
 
-
-
+#if SECURITY_MAC_CHECK_ENFORCE
+	/* 21167099 - only check if we allow write */
 	if (!mac_proc_enforce)
-		return (0);
-
-
+		return 0;
+#endif
 
 	MAC_CHECK(cred_check_visible, u1, u2);
 
-
 	return (error);
 }
 
@@ -298,11 +315,13 @@ mac_proc_check_debug(proc_t curp, struct proc *proc)
 	kauth_cred_t cred;
 	int error;
 
-
-
-	if (!mac_proc_enforce ||
-	    !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-		return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+	/* 21167099 - only check if we allow write */
+	if (!mac_proc_enforce)
+		return 0;
+#endif
+	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+		return 0;
 
 	cred = kauth_cred_proc_ref(curp);
 	MAC_CHECK(proc_check_debug, cred, proc);
@@ -317,9 +336,13 @@ mac_proc_check_fork(proc_t curp)
 	kauth_cred_t cred;
 	int error;
 
-	if (!mac_proc_enforce ||
-	    !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-		return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+	/* 21167099 - only check if we allow write */
+	if (!mac_proc_enforce)
+		return 0;
+#endif
+	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+		return 0;
 
 	cred = kauth_cred_proc_ref(curp);
 	MAC_CHECK(proc_check_fork, cred, curp);
@@ -348,6 +371,53 @@ mac_proc_check_get_task(struct ucred *cred, struct proc *p)
 	return (error);
 }
 
+int
+mac_proc_check_expose_task(struct ucred *cred, struct proc *p)
+{
+	int error;
+
+	MAC_CHECK(proc_check_expose_task, cred, p);
+
+	return (error);
+}
+
+int
+mac_proc_check_inherit_ipc_ports(struct proc *p, struct vnode *cur_vp, off_t cur_offset, struct vnode *img_vp, off_t img_offset, struct vnode *scriptvp)
+{
+	int error;
+
+	MAC_CHECK(proc_check_inherit_ipc_ports, p, cur_vp, cur_offset, img_vp, img_offset, scriptvp);
+
+	return (error);
+}
+
+/*
+ * The type of maxprot in proc_check_map_anon must be equivalent to vm_prot_t
+ * (defined in <mach/vm_prot.h>). mac_policy.h does not include any header
+ * files, so cannot use the typedef itself.
+ */
+int
+mac_proc_check_map_anon(proc_t proc, user_addr_t u_addr,
+    user_size_t u_size, int prot, int flags, int *maxprot)
+{
+	kauth_cred_t cred;
+	int error;
+
+#if SECURITY_MAC_CHECK_ENFORCE
+	/* 21167099 - only check if we allow write */
+	if (!mac_vm_enforce)
+		return 0;
+#endif
+	if (!mac_proc_check_enforce(proc, MAC_VM_ENFORCE))
+		return (0);
+
+	cred = kauth_cred_proc_ref(proc);
+	MAC_CHECK(proc_check_map_anon, proc, cred, u_addr, u_size, prot, flags, maxprot);
+	kauth_cred_unref(&cred);
+
+	return (error);
+}
+
 int
 mac_proc_check_mprotect(proc_t proc,
     user_addr_t addr, user_size_t size, int prot)
@@ -355,8 +425,12 @@ mac_proc_check_mprotect(proc_t proc,
 	kauth_cred_t cred;
 	int error;
 
-	if (!mac_vm_enforce ||
-	    !mac_proc_check_enforce(proc, MAC_VM_ENFORCE))
+#if SECURITY_MAC_CHECK_ENFORCE
+	/* 21167099 - only check if we allow write */
+	if (!mac_vm_enforce)
+		return 0;
+#endif
+	if (!mac_proc_check_enforce(proc, MAC_VM_ENFORCE))
 		return (0);
 
 	cred = kauth_cred_proc_ref(proc);
@@ -366,17 +440,35 @@ mac_proc_check_mprotect(proc_t proc,
 	return (error);
 }
 
+int
+mac_proc_check_run_cs_invalid(proc_t proc)
+{
+	int error;
+	
+#if SECURITY_MAC_CHECK_ENFORCE
+    /* 21167099 - only check if we allow write */
+    if (!mac_vm_enforce)
+        return 0;
+#endif
+	
+	MAC_CHECK(proc_check_run_cs_invalid, proc);
+	
+	return (error);
+}
+				   
 int
 mac_proc_check_sched(proc_t curp, struct proc *proc)
 {
 	kauth_cred_t cred;
 	int error;
 
-
-
-	if (!mac_proc_enforce ||
-	    !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-		return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+	/* 21167099 - only check if we allow write */
+	if (!mac_proc_enforce)
+		return 0;
+#endif
+	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+		return 0;
 
 	cred = kauth_cred_proc_ref(curp);
 	MAC_CHECK(proc_check_sched, cred, proc);
@@ -391,11 +483,13 @@ mac_proc_check_signal(proc_t curp, struct proc *proc, int signum)
 	kauth_cred_t cred;
 	int error;
 
-
-
-	if (!mac_proc_enforce ||
-	    !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-		return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+	/* 21167099 - only check if we allow write */
+	if (!mac_proc_enforce)
+		return 0;
+#endif
+	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+		return 0;
 
 	cred = kauth_cred_proc_ref(curp);
 	MAC_CHECK(proc_check_signal, cred, proc, signum);
@@ -410,11 +504,13 @@ mac_proc_check_wait(proc_t curp, struct proc *proc)
 	kauth_cred_t cred;
 	int error;
 
-
-
-	if (!mac_proc_enforce ||
-	    !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-		return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+	/* 21167099 - only check if we allow write */
+	if (!mac_proc_enforce)
+		return 0;
+#endif
+	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+		return 0;
 
 	cred = kauth_cred_proc_ref(curp);
 	MAC_CHECK(proc_check_wait, cred, proc);
@@ -423,120 +519,129 @@ mac_proc_check_wait(proc_t curp, struct proc *proc)
 	return (error);
 }
 
-#if CONFIG_LCTX
-/*
- * Login Context
- */
-
 int
-mac_proc_check_setlcid (struct proc *p0, struct proc *p,
-			pid_t pid, pid_t lcid)
+mac_proc_check_suspend_resume(proc_t curp, int sr)
 {
+	kauth_cred_t cred;
 	int error;
 
-	if (!mac_proc_enforce ||
-	    !mac_proc_check_enforce(p0, MAC_PROC_ENFORCE))
-		return (0);
+#if SECURITY_MAC_CHECK_ENFORCE
+	/* 21167099 - only check if we allow write */
+	if (!mac_proc_enforce)
+		return 0;
+#endif
+	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+		return 0;
+
+	cred = kauth_cred_proc_ref(curp);
+	MAC_CHECK(proc_check_suspend_resume, cred, curp, sr);
+	kauth_cred_unref(&cred);
 
-	MAC_CHECK(proc_check_setlcid, p0, p, pid, lcid);
 	return (error);
 }
 
 int
-mac_proc_check_getlcid (struct proc *p0, struct proc *p, pid_t pid)
+mac_proc_check_ledger(proc_t curp, proc_t proc, int ledger_op)
 {
-	int error;
-
-	if (!mac_proc_enforce ||
-	    !mac_proc_check_enforce(p0, MAC_PROC_ENFORCE))
-		return (0);
-
-	MAC_CHECK(proc_check_getlcid, p0, p, pid);
-	return (error);
-}
+	kauth_cred_t cred;
+	int error = 0;
 
-void
-mac_lctx_notify_create (struct proc *p, struct lctx *l)
-{
-	MAC_PERFORM(lctx_notify_create, p, l);
-}
+#if SECURITY_MAC_CHECK_ENFORCE
+	/* 21167099 - only check if we allow write */
+	if (!mac_proc_enforce)
+		return 0;
+#endif
+	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+		return 0;
 
-void
-mac_lctx_notify_join (struct proc *p, struct lctx *l)
-{
-	MAC_PERFORM(lctx_notify_join, p, l);
-}
+	cred = kauth_cred_proc_ref(curp);
+	MAC_CHECK(proc_check_ledger, cred, proc, ledger_op);
+	kauth_cred_unref(&cred);
 
-void
-mac_lctx_notify_leave (struct proc *p, struct lctx *l)
-{
-	MAC_PERFORM(lctx_notify_leave, p, l);
+	return (error);
 }
 
-struct label *
-mac_lctx_label_alloc(void)
+int
+mac_proc_check_cpumon(proc_t curp)
 {
-	struct label *label;
+	kauth_cred_t cred;
+	int error = 0;
 
-	label = mac_labelzone_alloc(MAC_WAITOK);
-	if (label == NULL)
-		return (NULL);
-	MAC_PERFORM(lctx_label_init, label);
-	return (label);
-}
+#if SECURITY_MAC_CHECK_ENFORCE
+	/* 21167099 - only check if we allow write */
+	if (!mac_proc_enforce)
+		return 0;
+#endif
+	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+		return 0;
 
-void
-mac_lctx_label_free(struct label *label)
-{
+	cred = kauth_cred_proc_ref(curp);
+	MAC_CHECK(proc_check_cpumon, cred);
+	kauth_cred_unref(&cred);
 
-	MAC_PERFORM(lctx_label_destroy, label);
-	mac_labelzone_free(label);
+	return (error);
 }
 
 int
-mac_lctx_label_externalize(struct label *label, char *elements,
-    char *outbuf, size_t outbuflen)
+mac_proc_check_proc_info(proc_t curp, proc_t target, int callnum, int flavor)
 {
-	int error;
+	kauth_cred_t cred;
+	int error = 0;
+
+#if SECURITY_MAC_CHECK_ENFORCE
+	/* 21167099 - only check if we allow write */
+	if (!mac_proc_enforce)
+		return 0;
+#endif
+	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+		return 0;
 
-	error = MAC_EXTERNALIZE(lctx, label, elements, outbuf, outbuflen);
+	cred = kauth_cred_proc_ref(curp);
+	MAC_CHECK(proc_check_proc_info, cred, target, callnum, flavor);
+	kauth_cred_unref(&cred);
 
 	return (error);
 }
 
 int
-mac_lctx_label_internalize(struct label *label, char *string)
+mac_proc_check_get_cs_info(proc_t curp, proc_t target, unsigned int op)
 {
-	int error;
-
-	error = MAC_INTERNALIZE(lctx, label, string);
+	kauth_cred_t cred;
+	int error = 0;
 
-	return (error);
-}
+#if SECURITY_MAC_CHECK_ENFORCE
+	/* 21167099 - only check if we allow write */
+	if (!mac_proc_enforce)
+		return 0;
+#endif
+	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+		return 0;
 
-void
-mac_lctx_label_update(struct lctx *l, struct label *newlabel)
-{
+	cred = kauth_cred_proc_ref(curp);
+	MAC_CHECK(proc_check_get_cs_info, cred, target, op);
+	kauth_cred_unref(&cred);
 
-	MAC_PERFORM(lctx_label_update, l, newlabel);
+	return (error);
 }
 
 int
-mac_lctx_check_label_update(struct lctx *l, struct label *newlabel)
+mac_proc_check_set_cs_info(proc_t curp, proc_t target, unsigned int op)
 {
-	int error;
+	kauth_cred_t cred;
+	int error = 0;
 
-	MAC_CHECK(lctx_check_label_update, l, newlabel);
+#if SECURITY_MAC_CHECK_ENFORCE
+	/* 21167099 - only check if we allow write */
+	if (!mac_proc_enforce)
+		return 0;
+#endif
+	if (!mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
+		return 0;
+
+	cred = kauth_cred_proc_ref(curp);
+	MAC_CHECK(proc_check_set_cs_info, cred, target, op);
+	kauth_cred_unref(&cred);
 
 	return (error);
 }
-#endif	/* LCTX */
-
 
-void
-mac_thread_userret(int code, int error, struct thread *thread)
-{
-
-	if (mac_late)
-		MAC_PERFORM(thread_userret, code, error, thread);
-}