#include <sys/syscall.h>
#include <sys/kdebug.h>
+#include <sys/bsdtask_info.h>
#include <security/audit/audit.h>
#include <bsm/audit_kevents.h>
#include <kern/cpu_number.h>
#include <kern/host.h>
#include <kern/task.h>
+#include <kern/page_decrypt.h>
+
+#include <IOKit/IOReturn.h>
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
#include <vm/vm_pager.h>
#include <vm/vm_protos.h>
-/* XXX the following function should probably be static */
-kern_return_t map_fd_funneled(int, vm_object_offset_t, vm_offset_t *,
- boolean_t, vm_size_t);
-
/*
* XXX Internally, we use VM_PROT_* somewhat interchangeably, but the correct
* XXX usage is PROT_* from an interface perspective. Thus the values of
return(ENOSYS);
}
-/* USV: No! need to obsolete map_fd()! mmap() already supports 64 bits */
-kern_return_t
-map_fd(struct map_fd_args *args)
-{
- int fd = args->fd;
- vm_offset_t offset = args->offset;
- vm_offset_t *va = args->va;
- boolean_t findspace = args->findspace;
- vm_size_t size = args->size;
- kern_return_t ret;
-
- AUDIT_MACH_SYSCALL_ENTER(AUE_MAPFD);
- AUDIT_ARG(addr, CAST_DOWN(user_addr_t, args->va));
- AUDIT_ARG(fd, fd);
-
- ret = map_fd_funneled( fd, (vm_object_offset_t)offset, va, findspace, size);
-
- AUDIT_MACH_SYSCALL_EXIT(ret);
- return ret;
-}
-
-kern_return_t
-map_fd_funneled(
- int fd,
- vm_object_offset_t offset,
- vm_offset_t *va,
- boolean_t findspace,
- vm_size_t size)
+#if CONFIG_CODE_DECRYPTION
+int
+mremap_encrypted(__unused struct proc *p, struct mremap_encrypted_args *uap, __unused int32_t *retval)
{
- kern_return_t result;
- struct fileproc *fp;
- struct vnode *vp;
- void * pager;
- vm_offset_t map_addr=0;
- vm_size_t map_size;
- int err=0;
- vm_prot_t maxprot = VM_PROT_ALL;
- vm_map_t my_map;
- proc_t p = current_proc();
- struct vnode_attr vattr;
-
- my_map = current_map();
-
- /*
- * Find the inode; verify that it's a regular file.
- */
-
- err = fp_lookup(p, fd, &fp, 0);
- if (err)
- return(err);
-
- if (FILEGLOB_DTYPE(fp->f_fglob) != DTYPE_VNODE) {
- err = KERN_INVALID_ARGUMENT;
- goto bad;
- }
-
- if (!(fp->f_fglob->fg_flag & FREAD)) {
- err = KERN_PROTECTION_FAILURE;
- goto bad;
- }
-
- vp = (struct vnode *)fp->f_fglob->fg_data;
- err = vnode_getwithref(vp);
- if(err != 0)
- goto bad;
-
- if (vp->v_type != VREG) {
- (void)vnode_put(vp);
- err = KERN_INVALID_ARGUMENT;
- goto bad;
- }
-
-#if CONFIG_MACF
- err = mac_file_check_mmap(vfs_context_ucred(vfs_context_current()),
- fp->f_fglob, VM_PROT_DEFAULT, MAP_FILE, &maxprot);
- if (err) {
- (void)vnode_put(vp);
- goto bad;
- }
-#endif /* MAC */
-
-#if CONFIG_PROTECT
- /* check for content protection access */
- {
- err = cp_handle_vnop(vp, CP_READ_ACCESS | CP_WRITE_ACCESS, 0);
- if (err != 0) {
- (void) vnode_put(vp);
- goto bad;
- }
- }
-#endif /* CONFIG_PROTECT */
-
- AUDIT_ARG(vnpath, vp, ARG_VNODE1);
-
- /*
- * POSIX: mmap needs to update access time for mapped files
- */
- if ((vnode_vfsvisflags(vp) & MNT_NOATIME) == 0) {
- VATTR_INIT(&vattr);
- nanotime(&vattr.va_access_time);
- VATTR_SET_ACTIVE(&vattr, va_access_time);
- vnode_setattr(vp, &vattr, vfs_context_current());
- }
-
- if (offset & vm_map_page_mask(my_map)) {
- printf("map_fd: file offset not page aligned(%d : %s)\n",p->p_pid, p->p_comm);
- (void)vnode_put(vp);
- err = KERN_INVALID_ARGUMENT;
- goto bad;
- }
- map_size = vm_map_round_page(size, vm_map_page_mask(my_map));
-
- /*
- * Allow user to map in a zero length file.
- */
- if (size == 0) {
- (void)vnode_put(vp);
- err = KERN_SUCCESS;
- goto bad;
- }
- /*
- * Map in the file.
- */
- pager = (void *)ubc_getpager(vp);
- if (pager == NULL) {
- (void)vnode_put(vp);
- err = KERN_FAILURE;
- goto bad;
- }
-
- result = vm_map_64(
- my_map,
- &map_addr, map_size, (vm_offset_t)0,
- VM_FLAGS_ANYWHERE, pager, offset, TRUE,
- VM_PROT_DEFAULT, maxprot,
- VM_INHERIT_DEFAULT);
- if (result != KERN_SUCCESS) {
- (void)vnode_put(vp);
- err = result;
- goto bad;
- }
-
-
- if (!findspace) {
- //K64todo fix for 64bit user?
- uint32_t dst_addr;
- vm_map_copy_t tmp;
-
- if (copyin(CAST_USER_ADDR_T(va), &dst_addr, sizeof (dst_addr)) ||
- trunc_page(dst_addr) != dst_addr) {
- (void) vm_map_remove(
- my_map,
- map_addr, map_addr + map_size,
- VM_MAP_NO_FLAGS);
- (void)vnode_put(vp);
- err = KERN_INVALID_ADDRESS;
- goto bad;
- }
-
- result = vm_map_copyin(my_map, (vm_map_address_t)map_addr,
- (vm_map_size_t)map_size, TRUE, &tmp);
- if (result != KERN_SUCCESS) {
-
- (void) vm_map_remove(
- my_map,
- vm_map_trunc_page(map_addr,
- vm_map_page_mask(my_map)),
- vm_map_round_page(map_addr + map_size,
- vm_map_page_mask(my_map)),
- VM_MAP_NO_FLAGS);
- (void)vnode_put(vp);
- err = result;
- goto bad;
- }
-
- result = vm_map_copy_overwrite(my_map,
- (vm_map_address_t)dst_addr, tmp, FALSE);
- if (result != KERN_SUCCESS) {
- vm_map_copy_discard(tmp);
- (void)vnode_put(vp);
- err = result;
- goto bad;
- }
- } else {
- // K64todo bug compatible now, should fix for 64bit user
- uint32_t user_map_addr = CAST_DOWN_EXPLICIT(uint32_t, map_addr);
- if (copyout(&user_map_addr, CAST_USER_ADDR_T(va), sizeof (user_map_addr))) {
- (void) vm_map_remove(
- my_map,
- vm_map_trunc_page(map_addr,
- vm_map_page_mask(my_map)),
- vm_map_round_page(map_addr + map_size,
- vm_map_page_mask(my_map)),
- VM_MAP_NO_FLAGS);
- (void)vnode_put(vp);
- err = KERN_INVALID_ADDRESS;
- goto bad;
- }
- }
-
- ubc_setthreadcred(vp, current_proc(), current_thread());
- (void)vnode_put(vp);
- err = 0;
-bad:
- fp_drop(p, fd, fp, 0);
- return (err);
+ mach_vm_offset_t user_addr;
+ mach_vm_size_t user_size;
+ kern_return_t result;
+ vm_map_t user_map;
+ uint32_t cryptid;
+ cpu_type_t cputype;
+ cpu_subtype_t cpusubtype;
+ pager_crypt_info_t crypt_info;
+ const char * cryptname = 0;
+ char *vpath;
+ int len, ret;
+ struct proc_regioninfo_internal pinfo;
+ vnode_t vp;
+ uintptr_t vnodeaddr;
+ uint32_t vid;
+
+ AUDIT_ARG(addr, uap->addr);
+ AUDIT_ARG(len, uap->len);
+
+ user_map = current_map();
+ user_addr = (mach_vm_offset_t) uap->addr;
+ user_size = (mach_vm_size_t) uap->len;
+
+ cryptid = uap->cryptid;
+ cputype = uap->cputype;
+ cpusubtype = uap->cpusubtype;
+
+ if (user_addr & vm_map_page_mask(user_map)) {
+ /* UNIX SPEC: user address is not page-aligned, return EINVAL */
+ return EINVAL;
+ }
+
+ switch(cryptid) {
+ case 0:
+ /* not encrypted, just an empty load command */
+ return 0;
+ case 1:
+ cryptname="com.apple.unfree";
+ break;
+ case 0x10:
+ /* some random cryptid that you could manually put into
+ * your binary if you want NULL */
+ cryptname="com.apple.null";
+ break;
+ default:
+ return EINVAL;
+ }
+
+ if (NULL == text_crypter_create) return ENOTSUP;
+
+ ret = fill_procregioninfo_onlymappedvnodes( proc_task(p), user_addr, &pinfo, &vnodeaddr, &vid);
+ if (ret == 0 || !vnodeaddr) {
+ /* No really, this returns 0 if the memory address is not backed by a file */
+ return (EINVAL);
+ }
+
+ vp = (vnode_t)vnodeaddr;
+ if ((vnode_getwithvid(vp, vid)) == 0) {
+ MALLOC_ZONE(vpath, char *, MAXPATHLEN, M_NAMEI, M_WAITOK);
+ if(vpath == NULL) {
+ vnode_put(vp);
+ return (ENOMEM);
+ }
+
+ len = MAXPATHLEN;
+ ret = vn_getpath(vp, vpath, &len);
+ if(ret) {
+ FREE_ZONE(vpath, MAXPATHLEN, M_NAMEI);
+ vnode_put(vp);
+ return (ret);
+ }
+
+ vnode_put(vp);
+ } else {
+ return (EINVAL);
+ }
+
+#if 0
+ kprintf("%s vpath %s cryptid 0x%08x cputype 0x%08x cpusubtype 0x%08x range 0x%016llx size 0x%016llx\n",
+ __FUNCTION__, vpath, cryptid, cputype, cpusubtype, (uint64_t)user_addr, (uint64_t)user_size);
+#endif
+
+ /* set up decrypter first */
+ crypt_file_data_t crypt_data = {
+ .filename = vpath,
+ .cputype = cputype,
+ .cpusubtype = cpusubtype };
+ result = text_crypter_create(&crypt_info, cryptname, (void*)&crypt_data);
+ FREE_ZONE(vpath, MAXPATHLEN, M_NAMEI);
+
+ if(result) {
+ printf("%s: unable to create decrypter %s, kr=%d\n",
+ __FUNCTION__, cryptname, result);
+ if (result == kIOReturnNotPrivileged) {
+ /* text encryption returned decryption failure */
+ return (EPERM);
+ } else {
+ return (ENOMEM);
+ }
+ }
+
+ /* now remap using the decrypter */
+ result = vm_map_apple_protected(user_map, user_addr, user_addr+user_size, &crypt_info);
+ if (result) {
+ printf("%s: mapping failed with %d\n", __FUNCTION__, result);
+ crypt_info.crypt_end(crypt_info.crypt_ops);
+ return (EPERM);
+ }
+
+ return 0;
}
-
+#endif /* CONFIG_CODE_DECRYPTION */
projects / apple / xnu.git / blobdiff