66c81a3794
Vendor changes (FreeBSD-related): Break ACL read/write code into platform-specific source files Vendor bugfixes (FreeBSD-related): PR 867 (bsdcpio): show numeric uid/gid when names are not found PR 870 (seekable zip): accept files with valid ZIP64 EOCD headers PR 880 (pax): Fix handling of "size" pax header keyword PR 887 (crypto): Discard 3072 bytes instead of 1024 of first keystream OSS-Fuzz issue 806 (mtree): rework mtree_atol10 integer parser Unbreak static dependency on libbz2
372 lines
9.7 KiB
C
372 lines
9.7 KiB
C
/*-
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* Copyright (c) 2003-2009 Tim Kientzle
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* Copyright (c) 2010-2012 Michihiro NAKAJIMA
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* Copyright (c) 2016-2017 Martin Matuska
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "archive_platform.h"
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_ACL_H
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#define _ACL_PRIVATE /* For debugging */
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#include <sys/acl.h>
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#endif
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#include "archive_entry.h"
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#include "archive_private.h"
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#include "archive_read_disk_private.h"
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#include "archive_acl_maps.h"
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/*
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* Translate FreeBSD ACLs into libarchive internal structure
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*/
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static int
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translate_acl(struct archive_read_disk *a,
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struct archive_entry *entry, acl_t acl, int default_entry_acl_type)
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{
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#if ARCHIVE_ACL_FREEBSD_NFS4
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int brand;
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acl_flagset_t acl_flagset;
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#endif
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acl_tag_t acl_tag;
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acl_entry_t acl_entry;
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acl_permset_t acl_permset;
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acl_entry_type_t acl_type;
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int i, entry_acl_type, perm_map_size;
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const acl_perm_map_t *perm_map;
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int r, s, ae_id, ae_tag, ae_perm;
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void *q;
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const char *ae_name;
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#if ARCHIVE_ACL_FREEBSD_NFS4
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// FreeBSD "brands" ACLs as POSIX.1e or NFSv4
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// Make sure the "brand" on this ACL is consistent
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// with the default_entry_acl_type bits provided.
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if (acl_get_brand_np(acl, &brand) != 0) {
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archive_set_error(&a->archive, errno,
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"Failed to read ACL brand");
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return (ARCHIVE_WARN);
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}
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switch (brand) {
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case ACL_BRAND_POSIX:
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switch (default_entry_acl_type) {
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case ARCHIVE_ENTRY_ACL_TYPE_ACCESS:
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case ARCHIVE_ENTRY_ACL_TYPE_DEFAULT:
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break;
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default:
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archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
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"Invalid ACL entry type for POSIX.1e ACL");
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return (ARCHIVE_WARN);
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}
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break;
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case ACL_BRAND_NFS4:
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if (default_entry_acl_type & ~ARCHIVE_ENTRY_ACL_TYPE_NFS4) {
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archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
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"Invalid ACL entry type for NFSv4 ACL");
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return (ARCHIVE_WARN);
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}
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break;
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default:
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archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
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"Unknown ACL brand");
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return (ARCHIVE_WARN);
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}
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#endif
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s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry);
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if (s == -1) {
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archive_set_error(&a->archive, errno,
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"Failed to get first ACL entry");
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return (ARCHIVE_WARN);
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}
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while (s == 1) {
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ae_id = -1;
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ae_name = NULL;
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ae_perm = 0;
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if (acl_get_tag_type(acl_entry, &acl_tag) != 0) {
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archive_set_error(&a->archive, errno,
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"Failed to get ACL tag type");
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return (ARCHIVE_WARN);
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}
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switch (acl_tag) {
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case ACL_USER:
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q = acl_get_qualifier(acl_entry);
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if (q != NULL) {
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ae_id = (int)*(uid_t *)q;
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acl_free(q);
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ae_name = archive_read_disk_uname(&a->archive,
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ae_id);
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}
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ae_tag = ARCHIVE_ENTRY_ACL_USER;
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break;
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case ACL_GROUP:
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q = acl_get_qualifier(acl_entry);
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if (q != NULL) {
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ae_id = (int)*(gid_t *)q;
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acl_free(q);
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ae_name = archive_read_disk_gname(&a->archive,
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ae_id);
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}
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ae_tag = ARCHIVE_ENTRY_ACL_GROUP;
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break;
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case ACL_MASK:
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ae_tag = ARCHIVE_ENTRY_ACL_MASK;
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break;
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case ACL_USER_OBJ:
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ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
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break;
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case ACL_GROUP_OBJ:
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ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
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break;
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case ACL_OTHER:
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ae_tag = ARCHIVE_ENTRY_ACL_OTHER;
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break;
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#if ARCHIVE_ACL_FREEBSD_NFS4
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case ACL_EVERYONE:
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ae_tag = ARCHIVE_ENTRY_ACL_EVERYONE;
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break;
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#endif
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default:
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/* Skip types that libarchive can't support. */
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s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
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continue;
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}
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// XXX acl_type maps to allow/deny/audit/YYYY bits
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entry_acl_type = default_entry_acl_type;
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#if ARCHIVE_ACL_FREEBSD_NFS4
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if (default_entry_acl_type & ARCHIVE_ENTRY_ACL_TYPE_NFS4) {
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/*
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* acl_get_entry_type_np() fails with non-NFSv4 ACLs
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*/
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if (acl_get_entry_type_np(acl_entry, &acl_type) != 0) {
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archive_set_error(&a->archive, errno, "Failed "
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"to get ACL type from a NFSv4 ACL entry");
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return (ARCHIVE_WARN);
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}
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switch (acl_type) {
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case ACL_ENTRY_TYPE_ALLOW:
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entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_ALLOW;
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break;
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case ACL_ENTRY_TYPE_DENY:
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entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_DENY;
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break;
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case ACL_ENTRY_TYPE_AUDIT:
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entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_AUDIT;
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break;
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case ACL_ENTRY_TYPE_ALARM:
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entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_ALARM;
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break;
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default:
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archive_set_error(&a->archive, errno,
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"Invalid NFSv4 ACL entry type");
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return (ARCHIVE_WARN);
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}
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/*
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* Libarchive stores "flag" (NFSv4 inheritance bits)
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* in the ae_perm bitmap.
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*
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* acl_get_flagset_np() fails with non-NFSv4 ACLs
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*/
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if (acl_get_flagset_np(acl_entry, &acl_flagset) != 0) {
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archive_set_error(&a->archive, errno,
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"Failed to get flagset from a NFSv4 "
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"ACL entry");
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return (ARCHIVE_WARN);
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}
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for (i = 0; i < acl_nfs4_flag_map_size; ++i) {
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r = acl_get_flag_np(acl_flagset,
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acl_nfs4_flag_map[i].p_perm);
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if (r == -1) {
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archive_set_error(&a->archive, errno,
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"Failed to check flag in a NFSv4 "
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"ACL flagset");
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return (ARCHIVE_WARN);
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} else if (r)
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ae_perm |= acl_nfs4_flag_map[i].a_perm;
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}
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}
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#endif
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if (acl_get_permset(acl_entry, &acl_permset) != 0) {
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archive_set_error(&a->archive, errno,
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"Failed to get ACL permission set");
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return (ARCHIVE_WARN);
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}
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#if ARCHIVE_ACL_FREEBSD_NFS4
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if (default_entry_acl_type & ARCHIVE_ENTRY_ACL_TYPE_NFS4) {
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perm_map_size = acl_nfs4_perm_map_size;
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perm_map = acl_nfs4_perm_map;
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} else {
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#endif
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perm_map_size = acl_posix_perm_map_size;
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perm_map = acl_posix_perm_map;
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#if ARCHIVE_ACL_FREEBSD_NFS4
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}
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#endif
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for (i = 0; i < perm_map_size; ++i) {
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r = acl_get_perm_np(acl_permset, perm_map[i].p_perm);
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if (r == -1) {
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archive_set_error(&a->archive, errno,
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"Failed to check permission in an ACL "
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"permission set");
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return (ARCHIVE_WARN);
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} else if (r)
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ae_perm |= perm_map[i].a_perm;
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}
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archive_entry_acl_add_entry(entry, entry_acl_type,
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ae_perm, ae_tag,
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ae_id, ae_name);
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s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
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if (s == -1) {
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archive_set_error(&a->archive, errno,
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"Failed to get next ACL entry");
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return (ARCHIVE_WARN);
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}
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}
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return (ARCHIVE_OK);
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}
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int
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archive_read_disk_entry_setup_acls(struct archive_read_disk *a,
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struct archive_entry *entry, int *fd)
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{
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const char *accpath;
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acl_t acl;
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int r;
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accpath = NULL;
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if (*fd < 0) {
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accpath = archive_read_disk_entry_setup_path(a, entry, fd);
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if (accpath == NULL)
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return (ARCHIVE_WARN);
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}
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archive_entry_acl_clear(entry);
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acl = NULL;
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#if ARCHIVE_ACL_FREEBSD_NFS4
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/* Try NFSv4 ACL first. */
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if (*fd >= 0)
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acl = acl_get_fd_np(*fd, ACL_TYPE_NFS4);
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else if (!a->follow_symlinks)
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acl = acl_get_link_np(accpath, ACL_TYPE_NFS4);
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else
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acl = acl_get_file(accpath, ACL_TYPE_NFS4);
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/* Ignore "trivial" ACLs that just mirror the file mode. */
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if (acl != NULL && acl_is_trivial_np(acl, &r) == 0 && r == 1) {
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acl_free(acl);
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acl = NULL;
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return (ARCHIVE_OK);
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}
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if (acl != NULL) {
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r = translate_acl(a, entry, acl, ARCHIVE_ENTRY_ACL_TYPE_NFS4);
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acl_free(acl);
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acl = NULL;
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if (r != ARCHIVE_OK) {
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archive_set_error(&a->archive, errno,
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"Couldn't translate NFSv4 ACLs");
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}
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return (r);
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}
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#endif
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/* Retrieve access ACL from file. */
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if (*fd >= 0)
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acl = acl_get_fd_np(*fd, ACL_TYPE_ACCESS);
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#if HAVE_ACL_GET_LINK_NP
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else if (!a->follow_symlinks)
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acl = acl_get_link_np(accpath, ACL_TYPE_ACCESS);
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#else
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else if ((!a->follow_symlinks)
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&& (archive_entry_filetype(entry) == AE_IFLNK))
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/* We can't get the ACL of a symlink, so we assume it can't
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have one. */
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acl = NULL;
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#endif
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else
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acl = acl_get_file(accpath, ACL_TYPE_ACCESS);
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#if HAVE_ACL_IS_TRIVIAL_NP
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/* Ignore "trivial" ACLs that just mirror the file mode. */
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if (acl != NULL && acl_is_trivial_np(acl, &r) == 0 && r == 1) {
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acl_free(acl);
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acl = NULL;
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}
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#endif
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if (acl != NULL) {
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r = translate_acl(a, entry, acl, ARCHIVE_ENTRY_ACL_TYPE_ACCESS);
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acl_free(acl);
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acl = NULL;
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if (r != ARCHIVE_OK) {
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archive_set_error(&a->archive, errno,
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"Couldn't translate access ACLs");
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return (r);
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}
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}
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/* Only directories can have default ACLs. */
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if (S_ISDIR(archive_entry_mode(entry))) {
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if (*fd >= 0)
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acl = acl_get_fd_np(*fd, ACL_TYPE_DEFAULT);
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else
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acl = acl_get_file(accpath, ACL_TYPE_DEFAULT);
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if (acl != NULL) {
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r = translate_acl(a, entry, acl,
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ARCHIVE_ENTRY_ACL_TYPE_DEFAULT);
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acl_free(acl);
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if (r != ARCHIVE_OK) {
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archive_set_error(&a->archive, errno,
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"Couldn't translate default ACLs");
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return (r);
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}
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}
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}
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return (ARCHIVE_OK);
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}
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