X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/593a1d5fd87cdf5b46dd5fcb84467b432cea0f91..bca245acd4c03fd752d1a45f011ad495e60fe53d:/security/mac_process.c?ds=sidebyside

diff --git a/security/mac_process.c b/security/mac_process.c
index 4ed4d53b7..31d539af2 100644
--- a/security/mac_process.c
+++ b/security/mac_process.c
@@ -1,8 +1,8 @@
 /*
- * Copyright (c) 2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2007-2010 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- * 
+ *
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
@@ -11,10 +11,10 @@
  * unlawful or unlicensed copies of an Apple operating system, or to
  * circumvent, violate, or enable the circumvention or violation of, any
  * terms of an Apple operating system software license agreement.
- * 
+ *
  * Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this file.
- * 
+ *
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
@@ -22,7 +22,7 @@
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.
- * 
+ *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 
@@ -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)
@@ -83,10 +86,11 @@ mac_cred_label_alloc(void)
 	struct label *label;
 
 	label = mac_labelzone_alloc(MAC_WAITOK);
-	if (label == NULL)
-		return (NULL);
+	if (label == NULL) {
+		return NULL;
+	}
 	MAC_PERFORM(cred_label_init, label);
-	return (label);
+	return label;
 }
 
 void
@@ -102,6 +106,12 @@ 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)
 {
@@ -114,13 +124,12 @@ mac_cred_label_externalize_audit(struct proc *p, struct mac *mac)
 	    mac->m_string, mac->m_buflen);
 
 	kauth_cred_unref(&cr);
-	return (error);
+	return error;
 }
 
 void
 mac_cred_label_destroy(kauth_cred_t cred)
 {
-
 	mac_cred_label_free(cred->cr_label);
 	cred->cr_label = NULL;
 }
@@ -133,7 +142,7 @@ mac_cred_label_externalize(struct label *label, char *elements,
 
 	error = MAC_EXTERNALIZE(cred, label, elements, outbuf, outbuflen);
 
-	return (error);
+	return error;
 }
 
 int
@@ -143,7 +152,7 @@ mac_cred_label_internalize(struct label *label, char *string)
 
 	error = MAC_INTERNALIZE(cred, label, string);
 
-	return (error);
+	return error;
 }
 
 /*
@@ -157,7 +166,7 @@ mac_cred_label_associate_fork(kauth_cred_t cred, proc_t proc)
 {
 	MAC_PERFORM(cred_label_associate_fork, cred, proc);
 }
-	
+
 /*
  * Initialize MAC label for the first kernel process, from which other
  * kernel processes and threads are spawned.
@@ -165,7 +174,6 @@ mac_cred_label_associate_fork(kauth_cred_t cred, proc_t proc)
 void
 mac_cred_label_associate_kernel(kauth_cred_t cred)
 {
-
 	MAC_PERFORM(cred_label_associate_kernel, cred);
 }
 
@@ -176,7 +184,6 @@ mac_cred_label_associate_kernel(kauth_cred_t cred)
 void
 mac_cred_label_associate_user(kauth_cred_t cred)
 {
-
 	MAC_PERFORM(cred_label_associate_user, cred);
 }
 
@@ -188,7 +195,6 @@ mac_cred_label_associate_user(kauth_cred_t cred)
 void
 mac_cred_label_associate(struct ucred *parent_cred, struct ucred *child_cred)
 {
-
 	MAC_PERFORM(cred_label_associate, parent_cred, child_cred);
 }
 
@@ -201,29 +207,36 @@ mac_execve_enter(user_addr_t mac_p, struct image_params *imgp)
 	int error;
 	size_t ulen;
 
-	if (mac_p == USER_ADDR_NULL)
-		return (0);
+	if (mac_p == USER_ADDR_NULL) {
+		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;
 	}
-	if (error)
-		return (error);
 
 	error = mac_check_structmac_consistent(&mac);
-	if (error)
-		return (error);
+	if (error) {
+		return error;
+	}
 
 	execlabel = mac_cred_label_alloc();
 	MALLOC(buffer, char *, mac.m_buflen, M_MACTEMP, M_WAITOK);
 	error = copyinstr(CAST_USER_ADDR_T(mac.m_string), buffer, mac.m_buflen, &ulen);
-	if (error)
+	if (error) {
 		goto out;
+	}
 	AUDIT_ARG(mac_string, buffer);
 
 	error = mac_cred_label_internalize(execlabel, buffer);
@@ -234,20 +247,24 @@ out:
 	}
 	imgp->ip_execlabelp = execlabel;
 	FREE(buffer, M_MACTEMP);
-	return (error);
+	return error;
 }
 
 /*
  * 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);
@@ -258,12 +275,16 @@ 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);
 
-	return (error);
+	return error;
 }
 
 int
@@ -271,25 +292,16 @@ mac_cred_check_visible(kauth_cred_t u1, kauth_cred_t u2)
 {
 	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_visible, u1, u2);
 
-
-	return (error);
-}
-
-/*                                                                                                    
- * called with process locked.                                                                        
- */
-void mac_proc_set_enforce(proc_t p, int enforce_flags)
-{
-        p->p_mac_enforce |= enforce_flags;
+	return error;
 }
 
 int
@@ -298,17 +310,41 @@ 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)) {
+		return 0;
+	}
 
 	cred = kauth_cred_proc_ref(curp);
 	MAC_CHECK(proc_check_debug, cred, proc);
 	kauth_cred_unref(&cred);
 
-	return (error);
+	return error;
+}
+
+int
+mac_proc_check_dump_core(struct proc *proc)
+{
+	int 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(proc)) {
+		return 0;
+	}
+
+	MAC_CHECK(proc_check_dump_core, proc);
+
+	return error;
 }
 
 int
@@ -317,15 +353,21 @@ 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)) {
+		return 0;
+	}
 
 	cred = kauth_cred_proc_ref(curp);
 	MAC_CHECK(proc_check_fork, cred, curp);
 	kauth_cred_unref(&cred);
 
-	return (error);
+	return error;
 }
 
 int
@@ -335,7 +377,7 @@ mac_proc_check_get_task_name(struct ucred *cred, struct proc *p)
 
 	MAC_CHECK(proc_check_get_task_name, cred, p);
 
-	return (error);
+	return error;
 }
 
 int
@@ -345,213 +387,305 @@ mac_proc_check_get_task(struct ucred *cred, struct proc *p)
 
 	MAC_CHECK(proc_check_get_task, cred, p);
 
-	return (error);
+	return error;
 }
 
 int
-mac_proc_check_mprotect(proc_t proc,
-    user_addr_t addr, user_size_t size, int prot)
+mac_proc_check_expose_task(struct ucred *cred, struct proc *p)
 {
-	kauth_cred_t cred;
 	int error;
 
-	if (!mac_vm_enforce ||
-	    !mac_proc_check_enforce(proc, MAC_VM_ENFORCE))
-		return (0);
+	MAC_CHECK(proc_check_expose_task, cred, p);
 
-	cred = kauth_cred_proc_ref(proc);
-	MAC_CHECK(proc_check_mprotect, cred, proc, addr, size, prot);
-	kauth_cred_unref(&cred);
+	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);
+	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_prot_copy_allow(proc_t proc)
+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 (!mac_vm_enforce) return (0);
-	
+
+#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)) {
+		return 0;
+	}
+
 	cred = kauth_cred_proc_ref(proc);
-	MAC_CHECK(proc_check_map_prot_copy_allow, cred, proc);
+	MAC_CHECK(proc_check_map_anon, proc, cred, u_addr, u_size, prot, flags, maxprot);
 	kauth_cred_unref(&cred);
-	
-	return (error);
+
+	return error;
 }
-				   
+
 int
-mac_proc_check_sched(proc_t curp, struct proc *proc)
+mac_proc_check_mprotect(proc_t proc,
+    user_addr_t addr, user_size_t size, int prot)
 {
 	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)) {
+		return 0;
+	}
 
-
-	if (!mac_proc_enforce ||
-	    !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-		return (0);
-
-	cred = kauth_cred_proc_ref(curp);
-	MAC_CHECK(proc_check_sched, cred, proc);
+	cred = kauth_cred_proc_ref(proc);
+	MAC_CHECK(proc_check_mprotect, cred, proc, addr, size, prot);
 	kauth_cred_unref(&cred);
 
-	return (error);
+	return error;
 }
 
 int
-mac_proc_check_signal(proc_t curp, struct proc *proc, int signum)
+mac_proc_check_run_cs_invalid(proc_t proc)
 {
-	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
 
+	MAC_CHECK(proc_check_run_cs_invalid, proc);
 
-	if (!mac_proc_enforce ||
-	    !mac_proc_check_enforce(curp, MAC_PROC_ENFORCE))
-		return (0);
-
-	cred = kauth_cred_proc_ref(curp);
-	MAC_CHECK(proc_check_signal, cred, proc, signum);
-	kauth_cred_unref(&cred);
-
-	return (error);
+	return error;
 }
 
 int
-mac_proc_check_wait(proc_t curp, struct proc *proc)
+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)) {
+		return 0;
+	}
 
 	cred = kauth_cred_proc_ref(curp);
-	MAC_CHECK(proc_check_wait, cred, proc);
+	MAC_CHECK(proc_check_sched, cred, proc);
 	kauth_cred_unref(&cred);
 
-	return (error);
+	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_signal(proc_t curp, struct proc *proc, int signum)
 {
+	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)) {
+		return 0;
+	}
 
-	MAC_CHECK(proc_check_setlcid, p0, p, pid, lcid);
-	return (error);
+	cred = kauth_cred_proc_ref(curp);
+	MAC_CHECK(proc_check_signal, cred, proc, signum);
+	kauth_cred_unref(&cred);
+
+	return error;
 }
 
 int
-mac_proc_check_getlcid (struct proc *p0, struct proc *p, pid_t pid)
+mac_proc_check_syscall_unix(proc_t curp, int scnum)
 {
 	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)) {
+		return 0;
+	}
 
-	MAC_CHECK(proc_check_getlcid, p0, p, pid);
-	return (error);
-}
+	MAC_CHECK(proc_check_syscall_unix, curp, scnum);
 
-void
-mac_lctx_notify_create (struct proc *p, struct lctx *l)
-{
-	MAC_PERFORM(lctx_notify_create, p, l);
+	return error;
 }
 
-void
-mac_lctx_notify_join (struct proc *p, struct lctx *l)
+int
+mac_proc_check_wait(proc_t curp, struct proc *proc)
 {
-	MAC_PERFORM(lctx_notify_join, p, l);
-}
+	kauth_cred_t cred;
+	int error;
 
-void
-mac_lctx_notify_leave (struct proc *p, struct lctx *l)
-{
-	MAC_PERFORM(lctx_notify_leave, 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)) {
+		return 0;
+	}
 
-struct label *
-mac_lctx_label_alloc(void)
-{
-	struct label *label;
+	cred = kauth_cred_proc_ref(curp);
+	MAC_CHECK(proc_check_wait, cred, proc);
+	kauth_cred_unref(&cred);
 
-	label = mac_labelzone_alloc(MAC_WAITOK);
-	if (label == NULL)
-		return (NULL);
-	MAC_PERFORM(lctx_label_init, label);
-	return (label);
+	return error;
 }
 
 void
-mac_lctx_label_free(struct label *label)
+mac_proc_notify_exit(struct proc *proc)
 {
-
-	MAC_PERFORM(lctx_label_destroy, label);
-	mac_labelzone_free(label);
+	MAC_PERFORM(proc_notify_exit, proc);
 }
 
 int
-mac_lctx_label_externalize(struct label *label, char *elements,
-    char *outbuf, size_t outbuflen)
+mac_proc_check_suspend_resume(proc_t curp, int sr)
 {
+	kauth_cred_t cred;
 	int error;
 
-	error = MAC_EXTERNALIZE(lctx, label, elements, outbuf, outbuflen);
+#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)) {
+		return 0;
+	}
+
+	cred = kauth_cred_proc_ref(curp);
+	MAC_CHECK(proc_check_suspend_resume, cred, curp, sr);
+	kauth_cred_unref(&cred);
 
-	return (error);
+	return error;
 }
 
 int
-mac_lctx_label_internalize(struct label *label, char *string)
+mac_proc_check_ledger(proc_t curp, proc_t proc, int ledger_op)
 {
-	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)) {
+		return 0;
+	}
 
-	error = MAC_INTERNALIZE(lctx, label, string);
+	cred = kauth_cred_proc_ref(curp);
+	MAC_CHECK(proc_check_ledger, cred, proc, ledger_op);
+	kauth_cred_unref(&cred);
 
-	return (error);
+	return error;
 }
 
-void
-mac_lctx_label_update(struct lctx *l, struct label *newlabel)
+int
+mac_proc_check_proc_info(proc_t curp, proc_t target, int callnum, int flavor)
 {
+	kauth_cred_t cred;
+	int error = 0;
 
-	MAC_PERFORM(lctx_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)) {
+		return 0;
+	}
+
+	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_check_label_update(struct lctx *l, struct label *newlabel)
+mac_proc_check_get_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)) {
+		return 0;
+	}
 
-	return (error);
-}
-#endif	/* LCTX */
+	cred = kauth_cred_proc_ref(curp);
+	MAC_CHECK(proc_check_get_cs_info, cred, target, op);
+	kauth_cred_unref(&cred);
 
+	return error;
+}
 
-void
-mac_thread_userret(int code, int error, struct thread *thread)
+int
+mac_proc_check_set_cs_info(proc_t curp, proc_t target, unsigned int op)
 {
+	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)) {
+		return 0;
+	}
+
+	cred = kauth_cred_proc_ref(curp);
+	MAC_CHECK(proc_check_set_cs_info, cred, target, op);
+	kauth_cred_unref(&cred);
 
-	if (mac_late)
-		MAC_PERFORM(thread_userret, code, error, thread);
+	return error;
 }