4 * Copyright (c) International Business Machines Corp., 2007
5 * Author(s): Steve French (sfrench@us.ibm.com)
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #define NUM_AUTHS (6) /* number of authority fields */
27 #define SID_MAX_SUB_AUTHORITIES (15) /* max number of sub authority fields */
33 #define ACL_OWNER_MASK 0700
34 #define ACL_GROUP_MASK 0070
35 #define ACL_EVERYONE_MASK 0007
40 #define ACCESS_ALLOWED 0
41 #define ACCESS_DENIED 1
47 * Security Descriptor length containing DACL with 3 ACEs (one each for
48 * owner, group and world).
50 #define DEFAULT_SEC_DESC_LEN (sizeof(struct cifs_ntsd) + \
51 sizeof(struct cifs_acl) + \
52 (sizeof(struct cifs_ace) * 4))
55 * Maximum size of a string representation of a SID:
57 * The fields are unsigned values in decimal. So:
59 * u8: max 3 bytes in decimal
60 * u32: max 10 bytes in decimal
62 * "S-" + 3 bytes for version field + 15 for authority field + NULL terminator
64 * For authority field, max is when all 6 values are non-zero and it must be
65 * represented in hex. So "-0x" + 12 hex digits.
67 * Add 11 bytes for each subauthority field (10 bytes each + 1 for '-')
69 #define SID_STRING_BASE_SIZE (2 + 3 + 15 + 1)
70 #define SID_STRING_SUBAUTH_SIZE (11) /* size of a single subauth string */
73 __le16 revision; /* revision level */
79 } __attribute__((packed));
82 __u8 revision; /* revision level */
84 __u8 authority[NUM_AUTHS];
85 __le32 sub_auth[SID_MAX_SUB_AUTHORITIES]; /* sub_auth[num_subauth] */
86 } __attribute__((packed));
88 /* size of a struct cifs_sid, sans sub_auth array */
89 #define CIFS_SID_BASE_SIZE (1 + 1 + NUM_AUTHS)
92 __le16 revision; /* revision level */
95 } __attribute__((packed));
97 /* ACE types - see MS-DTYP 2.4.4.1 */
98 #define ACCESS_ALLOWED_ACE_TYPE 0x00
99 #define ACCESS_DENIED_ACE_TYPE 0x01
100 #define SYSTEM_AUDIT_ACE_TYPE 0x02
101 #define SYSTEM_ALARM_ACE_TYPE 0x03
102 #define ACCESS_ALLOWED_COMPOUND_ACE_TYPE 0x04
103 #define ACCESS_ALLOWED_OBJECT_ACE_TYPE 0x05
104 #define ACCESS_DENIED_OBJECT_ACE_TYPE 0x06
105 #define SYSTEM_AUDIT_OBJECT_ACE_TYPE 0x07
106 #define SYSTEM_ALARM_OBJECT_ACE_TYPE 0x08
107 #define ACCESS_ALLOWED_CALLBACK_ACE_TYPE 0x09
108 #define ACCESS_DENIED_CALLBACK_ACE_TYPE 0x0A
109 #define ACCESS_ALLOWED_CALLBACK_OBJECT_ACE_TYPE 0x0B
110 #define ACCESS_DENIED_CALLBACK_OBJECT_ACE_TYPE 0x0C
111 #define SYSTEM_AUDIT_CALLBACK_ACE_TYPE 0x0D
112 #define SYSTEM_ALARM_CALLBACK_ACE_TYPE 0x0E /* Reserved */
113 #define SYSTEM_AUDIT_CALLBACK_OBJECT_ACE_TYPE 0x0F
114 #define SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE 0x10 /* reserved */
115 #define SYSTEM_MANDATORY_LABEL_ACE_TYPE 0x11
116 #define SYSTEM_RESOURCE_ATTRIBUTE_ACE_TYPE 0x12
117 #define SYSTEM_SCOPED_POLICY_ID_ACE_TYPE 0x13
120 #define OBJECT_INHERIT_ACE 0x01
121 #define CONTAINER_INHERIT_ACE 0x02
122 #define NO_PROPAGATE_INHERIT_ACE 0x04
123 #define INHERIT_ONLY_ACE 0x08
124 #define INHERITED_ACE 0x10
125 #define SUCCESSFUL_ACCESS_ACE_FLAG 0x40
126 #define FAILED_ACCESS_ACE_FLAG 0x80
129 __u8 type; /* see above and MS-DTYP 2.4.4.1 */
133 struct cifs_sid sid; /* ie UUID of user or group who gets these perms */
134 } __attribute__((packed));
137 * The current SMB3 form of security descriptor is similar to what was used for
138 * cifs (see above) but some fields are split, and fields in the struct below
139 * matches names of fields to the spec, MS-DTYP (see sections 2.4.5 and
140 * 2.4.6). Note that "CamelCase" fields are used in this struct in order to
141 * match the MS-DTYP and MS-SMB2 specs which define the wire format.
144 __u8 Revision; /* revision level, MUST be one */
145 __u8 Sbz1; /* only meaningful if 'RM' flag set below */
153 /* Meaning of 'Control' field flags */
154 #define ACL_CONTROL_SR 0x8000 /* Self relative */
155 #define ACL_CONTROL_RM 0x4000 /* Resource manager control bits */
156 #define ACL_CONTROL_PS 0x2000 /* SACL protected from inherits */
157 #define ACL_CONTROL_PD 0x1000 /* DACL protected from inherits */
158 #define ACL_CONTROL_SI 0x0800 /* SACL Auto-Inherited */
159 #define ACL_CONTROL_DI 0x0400 /* DACL Auto-Inherited */
160 #define ACL_CONTROL_SC 0x0200 /* SACL computed through inheritance */
161 #define ACL_CONTROL_DC 0x0100 /* DACL computed through inheritence */
162 #define ACL_CONTROL_SS 0x0080 /* Create server ACL */
163 #define ACL_CONTROL_DT 0x0040 /* DACL provided by trusted source */
164 #define ACL_CONTROL_SD 0x0020 /* SACL defaulted */
165 #define ACL_CONTROL_SP 0x0010 /* SACL is present on object */
166 #define ACL_CONTROL_DD 0x0008 /* DACL defaulted */
167 #define ACL_CONTROL_DP 0x0004 /* DACL is present on object */
168 #define ACL_CONTROL_GD 0x0002 /* Group was defaulted */
169 #define ACL_CONTROL_OD 0x0001 /* User was defaulted */
171 /* Meaning of AclRevision flags */
172 #define ACL_REVISION 0x02 /* See section 2.4.4.1 of MS-DTYP */
173 #define ACL_REVISION_DS 0x04 /* Additional AceTypes allowed */
176 u8 AclRevision; /* revision level */
180 __le16 Sbz2; /* MBZ */
184 * Used to store the special 'NFS SIDs' used to persist the POSIX uid and gid
185 * See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx
191 __le32 SubAuthorities[3];
194 struct owner_group_sids {
195 struct owner_sid owner;
196 struct owner_sid group;
200 * Minimum security identifier can be one for system defined Users
201 * and Groups such as NULL SID and World or Built-in accounts such
202 * as Administrator and Guest and consists of
203 * Revision + Num (Sub)Auths + Authority + Domain (one Subauthority)
205 #define MIN_SID_LEN (1 + 1 + 6 + 4) /* in bytes */
208 * Minimum security descriptor can be one without any SACL and DACL and can
209 * consist of revision, type, and two sids of minimum size for owner and group
211 #define MIN_SEC_DESC_LEN (sizeof(struct cifs_ntsd) + (2 * MIN_SID_LEN))
213 #endif /* _CIFSACL_H */