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 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #if defined(_KERNEL)
30 #include <sys/systm.h>
31 #include <sys/sunddi.h>
32 #include <sys/ctype.h>
33 #else
34 #include <stdio.h>
35 #include <unistd.h>
36 #include <strings.h>
37 #include <libnvpair.h>
38 #include <ctype.h>
39 #endif
40 /* XXX includes zfs_context.h, so why bother with the above? */
41 #include <sys/dsl_deleg.h>
42 #include "zfs_prop.h"
43 #include "zfs_deleg.h"
44 #include "zfs_namecheck.h"
45
46 /*
47 * permission table
48 *
49 * Keep this table in sorted order
50 *
51 * This table is used for displaying all permissions for
52 * zfs allow
53 */
54
55 zfs_deleg_perm_tab_t zfs_deleg_perm_tab[] = {
56 {ZFS_DELEG_PERM_ALLOW, ZFS_DELEG_NOTE_ALLOW},
57 {ZFS_DELEG_PERM_CLONE, ZFS_DELEG_NOTE_CLONE },
58 {ZFS_DELEG_PERM_CREATE, ZFS_DELEG_NOTE_CREATE },
59 {ZFS_DELEG_PERM_DESTROY, ZFS_DELEG_NOTE_DESTROY },
60 {ZFS_DELEG_PERM_MOUNT, ZFS_DELEG_NOTE_MOUNT },
61 {ZFS_DELEG_PERM_PROMOTE, ZFS_DELEG_NOTE_PROMOTE },
62 {ZFS_DELEG_PERM_RECEIVE, ZFS_DELEG_NOTE_RECEIVE },
63 {ZFS_DELEG_PERM_RENAME, ZFS_DELEG_NOTE_RENAME },
64 {ZFS_DELEG_PERM_ROLLBACK, ZFS_DELEG_NOTE_ROLLBACK },
65 {ZFS_DELEG_PERM_SNAPSHOT, ZFS_DELEG_NOTE_SNAPSHOT },
66 {ZFS_DELEG_PERM_SHARE, ZFS_DELEG_NOTE_SHARE },
67 {ZFS_DELEG_PERM_SEND, ZFS_DELEG_NOTE_NONE },
68 {ZFS_DELEG_PERM_USERPROP, ZFS_DELEG_NOTE_USERPROP },
69 {ZFS_DELEG_PERM_CRYPTO_DSL, ZFS_DELEG_NOTE_CRYPTO_DSL },
70 {ZFS_DELEG_PERM_CRYPTO_DSL_CHANGE, ZFS_DELEG_NOTE_CRYPTO_DSL_CHANGE },
71 {NULL, ZFS_DELEG_NOTE_NONE }
72 };
73
74 static int
75 zfs_valid_permission_name(const char *perm)
76 {
77 if (zfs_deleg_canonicalize_perm(perm))
78 return (0);
79
80 return (permset_namecheck(perm, NULL, NULL));
81 }
82
83 const char *
84 zfs_deleg_canonicalize_perm(const char *perm)
85 {
86 int i;
87 zfs_prop_t prop;
88
89 for (i = 0; zfs_deleg_perm_tab[i].z_perm != NULL; i++) {
90 if (strcmp(perm, zfs_deleg_perm_tab[i].z_perm) == 0)
91 return (perm);
92 }
93
94 prop = zfs_name_to_prop(perm);
95 if (prop != ZPROP_INVAL && zfs_prop_delegatable(prop))
96 return (zfs_prop_to_name(prop));
97 return (NULL);
98
99 }
100
101 static int
102 zfs_validate_who(char *who)
103 {
104 char *p;
105
106 if (who[2] != ZFS_DELEG_FIELD_SEP_CHR)
107 return (-1);
108
109 switch (who[0]) {
110 case ZFS_DELEG_USER:
111 case ZFS_DELEG_GROUP:
112 case ZFS_DELEG_USER_SETS:
113 case ZFS_DELEG_GROUP_SETS:
114 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
115 return (-1);
116 for (p = &who[3]; *p; p++)
117 if (!isdigit(*p))
118 return (-1);
119 break;
120
121 case ZFS_DELEG_NAMED_SET:
122 case ZFS_DELEG_NAMED_SET_SETS:
123 if (who[1] != ZFS_DELEG_NA)
124 return (-1);
125 return (permset_namecheck(&who[3], NULL, NULL));
126
127 case ZFS_DELEG_CREATE:
128 case ZFS_DELEG_CREATE_SETS:
129 if (who[1] != ZFS_DELEG_NA)
130 return (-1);
131 if (who[3] != '\0')
132 return (-1);
133 break;
134
135 case ZFS_DELEG_EVERYONE:
136 case ZFS_DELEG_EVERYONE_SETS:
137 if (who[1] != ZFS_DELEG_LOCAL && who[1] != ZFS_DELEG_DESCENDENT)
138 return (-1);
139 if (who[3] != '\0')
140 return (-1);
141 break;
142
143 default:
144 return (-1);
145 }
146
147 return (0);
148 }
149
150 int
151 zfs_deleg_verify_nvlist(nvlist_t *nvp)
152 {
153 nvpair_t *who, *perm_name;
154 nvlist_t *perms;
155 int error;
156
157 if (nvp == NULL)
158 return (-1);
159
160 who = nvlist_next_nvpair(nvp, NULL);
161 if (who == NULL)
162 return (-1);
163
164 do {
165 if (zfs_validate_who(nvpair_name(who)))
166 return (-1);
167
168 error = nvlist_lookup_nvlist(nvp, nvpair_name(who), &perms);
169
170 if (error && error != ENOENT)
171 return (-1);
172 if (error == ENOENT)
173 continue;
174
175 perm_name = nvlist_next_nvpair(perms, NULL);
176 if (perm_name == NULL) {
177 return (-1);
178 }
179 do {
180 error = zfs_valid_permission_name(
181 nvpair_name(perm_name));
182 if (error)
183 return (-1);
184 } while (perm_name = nvlist_next_nvpair(perms, perm_name));
185 } while (who = nvlist_next_nvpair(nvp, who));
186 return (0);
187 }
188
189 /*
190 * Construct the base attribute name. The base attribute names
191 * are the "key" to locate the jump objects which contain the actual
192 * permissions. The base attribute names are encoded based on
193 * type of entry and whether it is a local or descendent permission.
194 *
195 * Arguments:
196 * attr - attribute name return string, attribute is assumed to be
197 * ZFS_MAX_DELEG_NAME long.
198 * type - type of entry to construct
199 * inheritchr - inheritance type (local,descendent, or NA for create and
200 * permission set definitions
201 * data - is either a permission set name or a 64 bit uid/gid.
202 */
203 void
204 zfs_deleg_whokey(char *attr, zfs_deleg_who_type_t type,
205 char inheritchr, void *data)
206 {
207 int len = ZFS_MAX_DELEG_NAME;
208 uint64_t *id = data;
209
210 switch (type) {
211 case ZFS_DELEG_USER:
212 case ZFS_DELEG_GROUP:
213 case ZFS_DELEG_USER_SETS:
214 case ZFS_DELEG_GROUP_SETS:
215 (void) snprintf(attr, len, "%c%c%c%lld", type, inheritchr,
216 ZFS_DELEG_FIELD_SEP_CHR, (longlong_t)*id);
217 break;
218 case ZFS_DELEG_NAMED_SET_SETS:
219 case ZFS_DELEG_NAMED_SET:
220 (void) snprintf(attr, len, "%c-%c%s", type,
221 ZFS_DELEG_FIELD_SEP_CHR, (char *)data);
222 break;
223 case ZFS_DELEG_CREATE:
224 case ZFS_DELEG_CREATE_SETS:
225 (void) snprintf(attr, len, "%c-%c", type,
226 ZFS_DELEG_FIELD_SEP_CHR);
227 break;
228 case ZFS_DELEG_EVERYONE:
229 case ZFS_DELEG_EVERYONE_SETS:
230 (void) snprintf(attr, len, "%c%c%c", type, inheritchr,
231 ZFS_DELEG_FIELD_SEP_CHR);
232 break;
233 default:
234 ASSERT(!"bad zfs_deleg_who_type_t");
235 }
236 }