| /*- |
| * 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 */ |