/*-
* Copyright (c) 2017 Martin Matuska
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "archive_platform.h"
#if ARCHIVE_ACL_DARWIN
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#if HAVE_ERRNO_H
#include <errno.h>
#endif
#if HAVE_MEMBERSHIP_H
#include <membership.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_ACL_H
#define _ACL_PRIVATE /* For debugging */
#include <sys/acl.h>
#endif
#include "archive_entry.h"
#include "archive_private.h"
#include "archive_read_disk_private.h"
#include "archive_write_disk_private.h"
typedef struct {
const int a_perm; /* Libarchive permission or flag */
const int p_perm; /* Platform permission or flag */
} acl_perm_map_t;
static const acl_perm_map_t acl_nfs4_perm_map[] = {
{ARCHIVE_ENTRY_ACL_READ_DATA, ACL_READ_DATA},
{ARCHIVE_ENTRY_ACL_LIST_DIRECTORY, ACL_LIST_DIRECTORY},
{ARCHIVE_ENTRY_ACL_WRITE_DATA, ACL_WRITE_DATA},
{ARCHIVE_ENTRY_ACL_ADD_FILE, ACL_ADD_FILE},
{ARCHIVE_ENTRY_ACL_EXECUTE, ACL_EXECUTE},
{ARCHIVE_ENTRY_ACL_DELETE, ACL_DELETE},
{ARCHIVE_ENTRY_ACL_APPEND_DATA, ACL_APPEND_DATA},
{ARCHIVE_ENTRY_ACL_ADD_SUBDIRECTORY, ACL_ADD_SUBDIRECTORY},
{ARCHIVE_ENTRY_ACL_DELETE_CHILD, ACL_DELETE_CHILD},
{ARCHIVE_ENTRY_ACL_READ_ATTRIBUTES, ACL_READ_ATTRIBUTES},
{ARCHIVE_ENTRY_ACL_WRITE_ATTRIBUTES, ACL_WRITE_ATTRIBUTES},
{ARCHIVE_ENTRY_ACL_READ_NAMED_ATTRS, ACL_READ_EXTATTRIBUTES},
{ARCHIVE_ENTRY_ACL_WRITE_NAMED_ATTRS, ACL_WRITE_EXTATTRIBUTES},
{ARCHIVE_ENTRY_ACL_READ_ACL, ACL_READ_SECURITY},
{ARCHIVE_ENTRY_ACL_WRITE_ACL, ACL_WRITE_SECURITY},
{ARCHIVE_ENTRY_ACL_WRITE_OWNER, ACL_CHANGE_OWNER},
#if HAVE_DECL_ACL_SYNCHRONIZE
{ARCHIVE_ENTRY_ACL_SYNCHRONIZE, ACL_SYNCHRONIZE}
#endif
};
static const int acl_nfs4_perm_map_size =
(int)(sizeof(acl_nfs4_perm_map)/sizeof(acl_nfs4_perm_map[0]));
static const acl_perm_map_t acl_nfs4_flag_map[] = {
{ARCHIVE_ENTRY_ACL_ENTRY_INHERITED, ACL_ENTRY_INHERITED},
{ARCHIVE_ENTRY_ACL_ENTRY_FILE_INHERIT, ACL_ENTRY_FILE_INHERIT},
{ARCHIVE_ENTRY_ACL_ENTRY_DIRECTORY_INHERIT, ACL_ENTRY_DIRECTORY_INHERIT},
{ARCHIVE_ENTRY_ACL_ENTRY_NO_PROPAGATE_INHERIT, ACL_ENTRY_LIMIT_INHERIT},
{ARCHIVE_ENTRY_ACL_ENTRY_INHERIT_ONLY, ACL_ENTRY_ONLY_INHERIT}
};
static const int acl_nfs4_flag_map_size =
(int)(sizeof(acl_nfs4_flag_map)/sizeof(acl_nfs4_flag_map[0]));
static int translate_guid(struct archive *a, acl_entry_t acl_entry,
int *ae_id, int *ae_tag, const char **ae_name)
{
void *q;
uid_t ugid;
int r, idtype;
q = acl_get_qualifier(acl_entry);
if (q == NULL)
return (1);
r = mbr_uuid_to_id((const unsigned char *)q, &ugid, &idtype);
if (r != 0) {
acl_free(q);
return (1);
}
if (idtype == ID_TYPE_UID) {
*ae_tag = ARCHIVE_ENTRY_ACL_USER;
*ae_id = ugid;
*ae_name = archive_read_disk_uname(a, *ae_id);
} else if (idtype == ID_TYPE_GID) {
*ae_tag = ARCHIVE_ENTRY_ACL_GROUP;
*ae_id = ugid;
*ae_name = archive_read_disk_gname(a, *ae_id);
} else
r = 1;
acl_free(q);
return (r);
}
static void
add_trivial_nfs4_acl(struct archive_entry *entry)
{
mode_t mode;
int i;
const int rperm = ARCHIVE_ENTRY_ACL_READ_DATA;
const int wperm = ARCHIVE_ENTRY_ACL_WRITE_DATA |
ARCHIVE_ENTRY_ACL_APPEND_DATA;
const int eperm = ARCHIVE_ENTRY_ACL_EXECUTE;
const int pubset = ARCHIVE_ENTRY_ACL_READ_ATTRIBUTES |
ARCHIVE_ENTRY_ACL_READ_NAMED_ATTRS |
ARCHIVE_ENTRY_ACL_READ_ACL |
ARCHIVE_ENTRY_ACL_SYNCHRONIZE;
const int ownset = pubset | ARCHIVE_ENTRY_ACL_WRITE_ATTRIBUTES |
ARCHIVE_ENTRY_ACL_WRITE_NAMED_ATTRS |
ARCHIVE_ENTRY_ACL_WRITE_ACL |
ARCHIVE_ENTRY_ACL_WRITE_OWNER;
struct {
const int type;
const int tag;
int permset;
} tacl_entry[] = {
{ARCHIVE_ENTRY_ACL_TYPE_ALLOW, ARCHIVE_ENTRY_ACL_USER_OBJ, 0},
{ARCHIVE_ENTRY_ACL_TYPE_DENY, ARCHIVE_ENTRY_ACL_USER_OBJ, 0},
{ARCHIVE_ENTRY_ACL_TYPE_DENY, ARCHIVE_ENTRY_ACL_GROUP_OBJ, 0},
{ARCHIVE_ENTRY_ACL_TYPE_ALLOW, ARCHIVE_ENTRY_ACL_USER_OBJ, ownset},
{ARCHIVE_ENTRY_ACL_TYPE_ALLOW, ARCHIVE_ENTRY_ACL_GROUP_OBJ, pubset},
{ARCHIVE_ENTRY_ACL_TYPE_ALLOW, ARCHIVE_ENTRY_ACL_EVERYONE, pubset}
};
mode = archive_entry_mode(entry);
/* Permissions for everyone@ */
if (mode & 0004)
tacl_entry[5].permset |= rperm;
if (mode & 0002)
tacl_entry[5].permset |= wperm;
if (mode & 0001)
tacl_entry[5].permset |= eperm;
/* Permissions for group@ */
if (mode & 0040)
tacl_entry[4].permset |= rperm;
else if (mode & 0004)
tacl_entry[2].permset |= rperm;
if (mode & 0020)
tacl_entry[4].permset |= wperm;
else if (mode & 0002)
tacl_entry[2].permset |= wperm;
if (mode & 0010)
tacl_entry[4].permset |= eperm;
else if (mode & 0001)
tacl_entry[2].permset |= eperm;
/* Permissions for owner@ */
if (mode & 0400) {
tacl_entry[3].permset |= rperm;
if (!(mode & 0040) && (mode & 0004))
tacl_entry[0].permset |= rperm;
} else if ((mode & 0040) || (mode & 0004))
tacl_entry[1].permset |= rperm;
if (mode & 0200) {
tacl_entry[3].permset |= wperm;
if (!(mode & 0020) && (mode & 0002))
tacl_entry[0].permset |= wperm;
} else if ((mode & 0020) || (mode & 0002))
tacl_entry[1].permset |= wperm;
if (mode & 0100) {
tacl_entry[3].permset |= eperm;
if (!(mode & 0010) && (mode & 0001))
tacl_entry[0].permset |= eperm;
} else if ((mode & 0010) || (mode & 0001))
tacl_entry[1].permset |= eperm;
for (i = 0; i < 6; i++) {
if (tacl_entry[i].permset != 0) {
archive_entry_acl_add_entry(entry,
tacl_entry[i].type, tacl_entry[i].permset,
tacl_entry[i].tag, -1, NULL);
}
}
return;
}
static int
translate_acl(struct archive_read_disk *a,
struct archive_entry *entry, acl_t acl)
{
acl_tag_t acl_tag;
acl_flagset_t acl_flagset;
acl_entry_t acl_entry;
acl_permset_t acl_permset;
int i, entry_acl_type;
int r, s, ae_id, ae_tag, ae_perm;
const char *ae_name;
s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry);
if (s == -1) {
archive_set_error(&a->archive, errno,
"Failed to get first ACL entry");
return (ARCHIVE_WARN);
}
while (s == 0) {
ae_id = -1;
ae_name = NULL;
ae_perm = 0;
if (acl_get_tag_type(acl_entry, &acl_tag) != 0) {
archive_set_error(&a->archive, errno,
"Failed to get ACL tag type");
return (ARCHIVE_WARN);
}
switch (acl_tag) {
case ACL_EXTENDED_ALLOW:
entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_ALLOW;
r = translate_guid(&a->archive, acl_entry,
&ae_id, &ae_tag, &ae_name);
break;
case ACL_EXTENDED_DENY:
entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_DENY;
r = translate_guid(&a->archive, acl_entry,
&ae_id, &ae_tag, &ae_name);
break;
default:
/* Skip types that libarchive can't support. */
s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
continue;
}
/* Skip if translate_guid() above failed */
if (r != 0) {
s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
continue;
}
/*
* Libarchive stores "flag" (NFSv4 inheritance bits)
* in the ae_perm bitmap.
*
* acl_get_flagset_np() fails with non-NFSv4 ACLs
*/
if (acl_get_flagset_np(acl_entry, &acl_flagset) != 0) {
archive_set_error(&a->archive, errno,
"Failed to get flagset from a NFSv4 ACL entry");
return (ARCHIVE_WARN);
}
for (i = 0; i < acl_nfs4_flag_map_size; ++i) {
r = acl_get_flag_np(acl_flagset,
acl_nfs4_flag_map[i].p_perm);
if (r == -1) {
archive_set_error(&a->archive, errno,
"Failed to check flag in a NFSv4 "
"ACL flagset");
return (ARCHIVE_WARN);
} else if (r)
ae_perm |= acl_nfs4_flag_map[i].a_perm;
}
if (acl_get_permset(acl_entry, &acl_permset) != 0) {
archive_set_error(&a->archive, errno,
"Failed to get ACL permission set");
return (ARCHIVE_WARN);
}
for (i = 0; i < acl_nfs4_perm_map_size; ++i) {
/*
* acl_get_perm() is spelled differently on different
* platforms; see above.
*/
r = acl_get_perm_np(acl_permset,
acl_nfs4_perm_map[i].p_perm);
if (r == -1) {
archive_set_error(&a->archive, errno,
"Failed to check permission in an ACL "
"permission set");
return (ARCHIVE_WARN);
} else if (r)
ae_perm |= acl_nfs4_perm_map[i].a_perm;
}
#if !HAVE_DECL_ACL_SYNCHRONIZE
/* On Mac OS X without ACL_SYNCHRONIZE assume it is set */
ae_perm |= ARCHIVE_ENTRY_ACL_SYNCHRONIZE;
#endif
archive_entry_acl_add_entry(entry, entry_acl_type,
ae_perm, ae_tag,
ae_id, ae_name);
s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
}
return (ARCHIVE_OK);
}
static int
set_acl(struct archive *a, int fd, const char *name,
struct archive_acl *abstract_acl,
int ae_requested_type, const char *tname)
{
acl_t acl;
acl_entry_t acl_entry;
acl_permset_t acl_permset;
acl_flagset_t acl_flagset;
int ret;
int ae_type, ae_permset, ae_tag, ae_id;
uuid_t ae_uuid;
uid_t ae_uid;
gid_t ae_gid;
const char *ae_name;
int entries;
int i;
ret = ARCHIVE_OK;
entries = archive_acl_reset(abstract_acl, ae_requested_type);
if (entries == 0)
return (ARCHIVE_OK);
if (ae_requested_type != ARCHIVE_ENTRY_ACL_TYPE_NFS4) {
errno = ENOENT;
archive_set_error(a, errno, "Unsupported ACL type");
return (ARCHIVE_FAILED);
}
acl = acl_init(entries);
if (acl == (acl_t)NULL) {
archive_set_error(a, errno,
"Failed to initialize ACL working storage");
return (ARCHIVE_FAILED);
}
while (archive_acl_next(a, abstract_acl, ae_requested_type, &ae_type,
&ae_permset, &ae_tag, &ae_id, &ae_name) == ARCHIVE_OK) {
/*
* Mac OS doesn't support NFSv4 ACLs for
* owner@, group@ and everyone@.
* We skip any of these ACLs found.
*/
if (ae_tag == ARCHIVE_ENTRY_ACL_USER_OBJ ||
ae_tag == ARCHIVE_ENTRY_ACL_GROUP_OBJ ||
ae_tag == ARCHIVE_ENTRY_ACL_EVERYONE)
continue;
if (acl_create_entry(&acl, &acl_entry) != 0) {
archive_set_error(a, errno,
"Failed to create a new ACL entry");
ret = ARCHIVE_FAILED;
goto exit_free;
}
switch (ae_type) {
case ARCHIVE_ENTRY_ACL_TYPE_ALLOW:
acl_set_tag_type(acl_entry, ACL_EXTENDED_ALLOW);
break;
case ARCHIVE_ENTRY_ACL_TYPE_DENY:
acl_set_tag_type(acl_entry, ACL_EXTENDED_DENY);
break;
default:
/* We don't support any other types on MacOS */
continue;
}
switch (ae_tag) {
case ARCHIVE_ENTRY_ACL_USER:
ae_uid = archive_write_disk_uid(a, ae_name, ae_id);
if (mbr_uid_to_uuid(ae_uid, ae_uuid) != 0)
continue;
if (acl_set_qualifier(acl_entry, &ae_uuid) != 0)
continue;
break;
case ARCHIVE_ENTRY_ACL_GROUP:
ae_gid = archive_write_disk_gid(a, ae_name, ae_id);
if (mbr_gid_to_uuid(ae_gid, ae_uuid) != 0)
continue;
if (acl_set_qualifier(acl_entry, &ae_uuid) != 0)
continue;
break;
default:
archive_set_error(a, ARCHIVE_ERRNO_MISC,
"Unsupported ACL tag");
ret = ARCHIVE_FAILED;
goto exit_free;
}
if (acl_get_permset(acl_entry, &acl_permset) != 0) {
archive_set_error(a, errno,
"Failed to get ACL permission set");
ret = ARCHIVE_FAILED;
goto exit_free;
}
if (acl_clear_perms(acl_permset) != 0) {
archive_set_error(a, errno,
"Failed to clear ACL permissions");
ret = ARCHIVE_FAILED;
goto exit_free;
}
for (i = 0; i < acl_nfs4_perm_map_size; ++i) {
if (ae_permset & acl_nfs4_perm_map[i].a_perm) {
if (acl_add_perm(acl_permset,
acl_nfs4_perm_map[i].p_perm) != 0) {
archive_set_error(a, errno,
"Failed to add ACL permission");
ret = ARCHIVE_FAILED;
goto exit_free;
}
}
}
/*
* acl_get_flagset_np() fails with non-NFSv4 ACLs
*/
if (acl_get_flagset_np(acl_entry, &acl_flagset) != 0) {
archive_set_error(a, errno,
"Failed to get flagset from an NFSv4 ACL entry");
ret = ARCHIVE_FAILED;
goto exit_free;
}
if (acl_clear_flags_np(acl_flagset) != 0) {
archive_set_error(a, errno,
"Failed to clear flags from an NFSv4 ACL flagset");
ret = ARCHIVE_FAILED;
goto exit_free;
}
for (i = 0; i < acl_nfs4_flag_map_size; ++i) {
if (ae_permset & acl_nfs4_flag_map[i].a_perm) {
if (acl_add_flag_np(acl_flagset,
acl_nfs4_flag_map[i].p_perm) != 0) {
archive_set_error(a, errno,
"Failed to add flag to "
"NFSv4 ACL flagset");
ret = ARCHIVE_FAILED;
goto exit_free;
}
}
}
}
if (fd >= 0) {
if (acl_set_fd_np(fd, acl, ACL_TYPE_EXTENDED) == 0)
ret = ARCHIVE_OK;
else {
if (errno == EOPNOTSUPP) {
/* Filesystem doesn't support ACLs */
ret = ARCHIVE_OK;
} else {
archive_set_error(a, errno,
"Failed to set acl on fd: %s", tname);
ret = ARCHIVE_WARN;
}
}
} else if (acl_set_link_np(name, ACL_TYPE_EXTENDED, acl) != 0) {
if (errno == EOPNOTSUPP) {
/* Filesystem doesn't support ACLs */
ret = ARCHIVE_OK;
} else {
archive_set_error(a, errno, "Failed to set acl: %s",
tname);
ret = ARCHIVE_WARN;
}
}
exit_free:
acl_free(acl);
return (ret);
}
int
archive_read_disk_entry_setup_acls(struct archive_read_disk *a,
struct archive_entry *entry, int *fd)
{
const char *accpath;
acl_t acl;
int r;
accpath = NULL;
if (*fd < 0) {
accpath = archive_read_disk_entry_setup_path(a, entry, fd);
if (accpath == NULL)
return (ARCHIVE_WARN);
}
archive_entry_acl_clear(entry);
acl = NULL;
if (*fd >= 0)
acl = acl_get_fd_np(*fd, ACL_TYPE_EXTENDED);
else if (!a->follow_symlinks)
acl = acl_get_link_np(accpath, ACL_TYPE_EXTENDED);
else
acl = acl_get_file(accpath, ACL_TYPE_EXTENDED);
if (acl != NULL) {
r = translate_acl(a, entry, acl);
acl_free(acl);
acl = NULL;
if (r != ARCHIVE_OK) {
archive_set_error(&a->archive, errno,
"Couldn't translate NFSv4 ACLs");
}
/*
* Because Mac OS doesn't support owner@, group@ and everyone@
* ACLs we need to add NFSv4 ACLs mirroring the file mode to
* the archive entry. Otherwise extraction on non-Mac platforms
* would lead to an invalid file mode.
*/
if ((archive_entry_acl_types(entry) &
ARCHIVE_ENTRY_ACL_TYPE_NFS4) != 0)
add_trivial_nfs4_acl(entry);
return (r);
}
return (ARCHIVE_OK);
}
int
archive_write_disk_set_acls(struct archive *a, int fd, const char *name,
struct archive_acl *abstract_acl, __LA_MODE_T mode)
{
int ret = ARCHIVE_OK;
(void)mode; /* UNUSED */
if ((archive_acl_types(abstract_acl) &
ARCHIVE_ENTRY_ACL_TYPE_NFS4) != 0) {
ret = set_acl(a, fd, name, abstract_acl,
ARCHIVE_ENTRY_ACL_TYPE_NFS4, "nfs4");
}
return (ret);
}
#endif /* ARCHIVE_ACL_DARWIN */