1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright 2010 Nexenta Systems, Inc. All rights reserved.
24 * Copyright (c) 2013, 2015 by Delphix. All rights reserved.
25 * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
26 */
27
28#include <sys/zfs_context.h>
29
30#if defined(_KERNEL)
31#include <sys/sunddi.h>
32#include <sys/ctype.h>
33#else
34#include <stdio.h>
35#include <unistd.h>
36#include <libnvpair.h>
37#include <ctype.h>
38#endif
39#include <sys/strings.h>
40#include <sys/dsl_deleg.h>
41#include "zfs_prop.h"
42#include "zfs_deleg.h"
43#include "zfs_namecheck.h"
44
45zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = {
46	{ZFS_DELEG_PERM_ALLOW},
47	{ZFS_DELEG_PERM_BOOKMARK},
48	{ZFS_DELEG_PERM_CLONE},
49	{ZFS_DELEG_PERM_CREATE},
50	{ZFS_DELEG_PERM_DESTROY},
51	{ZFS_DELEG_PERM_DIFF},
52	{ZFS_DELEG_PERM_MOUNT},
53	{ZFS_DELEG_PERM_PROMOTE},
54	{ZFS_DELEG_PERM_RECEIVE},
55	{ZFS_DELEG_PERM_RENAME},
56	{ZFS_DELEG_PERM_ROLLBACK},
57	{ZFS_DELEG_PERM_SNAPSHOT},
58	{ZFS_DELEG_PERM_SHARE},
59	{ZFS_DELEG_PERM_SEND},
60	{ZFS_DELEG_PERM_USERPROP},
61	{ZFS_DELEG_PERM_USERQUOTA},
62	{ZFS_DELEG_PERM_GROUPQUOTA},
63	{ZFS_DELEG_PERM_USERUSED},
64	{ZFS_DELEG_PERM_GROUPUSED},
65	{ZFS_DELEG_PERM_USEROBJQUOTA},
66	{ZFS_DELEG_PERM_GROUPOBJQUOTA},
67	{ZFS_DELEG_PERM_USEROBJUSED},
68	{ZFS_DELEG_PERM_GROUPOBJUSED},
69	{ZFS_DELEG_PERM_HOLD},
70	{ZFS_DELEG_PERM_RELEASE},
71	{ZFS_DELEG_PERM_LOAD_KEY},
72	{ZFS_DELEG_PERM_CHANGE_KEY},
73	{ZFS_DELEG_PERM_PROJECTUSED},
74	{ZFS_DELEG_PERM_PROJECTQUOTA},
75	{ZFS_DELEG_PERM_PROJECTOBJUSED},
76	{ZFS_DELEG_PERM_PROJECTOBJQUOTA},
77	{NULL}
78};
79
80static int
81zfs_valid_permission_name(const char *perm)
82{
83	if (zfs_deleg_canonicalize_perm(perm))
84		return (0);
85
86	return (permset_namecheck(perm, NULL, NULL));
87}
88
89const char *
90zfs_deleg_canonicalize_perm(const char *perm)
91{
92	int i;
93	zfs_prop_t prop;
94
95	for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
96		if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
97			return (perm);
98	}
99
100	prop = zfs_name_to_prop(perm);
101	if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop))
102		return (zfs_prop_to_name(prop));
103	return (NULL);
104
105}
106
107static int
108zfs_validate_who(char *who)
109{
110	char *p;
111
112	if (who[2] != ZFS_DELEG_FIELD_SEP_CHR)
113		return (-1);
114
115	switch (who[0]) {
116	case ZFS_DELEG_USER:
117	case ZFS_DELEG_GROUP:
118	case ZFS_DELEG_USER_SETS:
119	case ZFS_DELEG_GROUP_SETS:
120		if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
121			return (-1);
122		for (p = &who[3]; *p; p++)
123			if (!isdigit(*p))
124				return (-1);
125		break;
126
127	case ZFS_DELEG_NAMED_SET:
128	case ZFS_DELEG_NAMED_SET_SETS:
129		if (who[1] != ZFS_DELEG_NA)
130			return (-1);
131		return (permset_namecheck(&who[3], NULL, NULL));
132
133	case ZFS_DELEG_CREATE:
134	case ZFS_DELEG_CREATE_SETS:
135		if (who[1] != ZFS_DELEG_NA)
136			return (-1);
137		if (who[3] != '\0')
138			return (-1);
139		break;
140
141	case ZFS_DELEG_EVERYONE:
142	case ZFS_DELEG_EVERYONE_SETS:
143		if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
144			return (-1);
145		if (who[3] != '\0')
146			return (-1);
147		break;
148
149	default:
150		return (-1);
151	}
152
153	return (0);
154}
155
156int
157zfs_deleg_verify_nvlist(nvlist_t *nvp)
158{
159	nvpair_t *who, *perm_name;
160	nvlist_t *perms;
161	int error;
162
163	if (nvp == NULL)
164		return (-1);
165
166	who = nvlist_next_nvpair(nvp, NULL);
167	if (who == NULL)
168		return (-1);
169
170	do {
171		if (zfs_validate_who(nvpair_name(who)))
172			return (-1);
173
174		error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms);
175
176		if (error && error != ENOENT)
177			return (-1);
178		if (error == ENOENT)
179			continue;
180
181		perm_name = nvlist_next_nvpair(perms, NULL);
182		if (perm_name == NULL) {
183			return (-1);
184		}
185		do {
186			error = zfs_valid_permission_name(
187			    nvpair_name(perm_name));
188			if (error)
189				return (-1);
190		} while ((perm_name = nvlist_next_nvpair(perms, perm_name))
191		    != NULL);
192	} while ((who = nvlist_next_nvpair(nvp, who)) != NULL);
193	return (0);
194}
195
196/*
197 * Construct the base attribute name.  The base attribute names
198 * are the "key" to locate the jump objects which contain the actual
199 * permissions.  The base attribute names are encoded based on
200 * type of entry and whether it is a local or descendent permission.
201 *
202 * Arguments:
203 * attr - attribute name return string, attribute is assumed to be
204 *        ZFS_MAX_DELEG_NAME long.
205 * type - type of entry to construct
206 * inheritchr - inheritance type (local,descendent, or NA for create and
207 *                               permission set definitions
208 * data - is either a permission set name or a 64 bit uid/gid.
209 */
210void
211zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type,
212    char inheritchr, void *data)
213{
214	int len = ZFS_MAX_DELEG_NAME;
215	uint64_t *id = data;
216
217	switch (type) {
218	case ZFS_DELEG_USER:
219	case ZFS_DELEG_GROUP:
220	case ZFS_DELEG_USER_SETS:
221	case ZFS_DELEG_GROUP_SETS:
222		(void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr,
223		    ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id);
224		break;
225	case ZFS_DELEG_NAMED_SET_SETS:
226	case ZFS_DELEG_NAMED_SET:
227		(void) snprintf(attr, len, "%c-%c%s", type,
228		    ZFS_DELEG_FIELD_SEP_CHR, (char *)data);
229		break;
230	case ZFS_DELEG_CREATE:
231	case ZFS_DELEG_CREATE_SETS:
232		(void) snprintf(attr, len, "%c-%c", type,
233		    ZFS_DELEG_FIELD_SEP_CHR);
234		break;
235	case ZFS_DELEG_EVERYONE:
236	case ZFS_DELEG_EVERYONE_SETS:
237		(void) snprintf(attr, len, "%c%c%c", type, inheritchr,
238		    ZFS_DELEG_FIELD_SEP_CHR);
239		break;
240	default:
241		ASSERT(!"bad zfs_deleg_who_type_t");
242	}
243}
244
245#if defined(_KERNEL)
246EXPORT_SYMBOL(zfs_deleg_verify_nvlist);
247EXPORT_SYMBOL(zfs_deleg_whokey);
248EXPORT_SYMBOL(zfs_deleg_canonicalize_perm);
249#endif
250