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1/* SPDX-License-Identifier: LGPL-2.1 */2/*3 *4 * Copyright (c) International Business Machines Corp., 20075 * Author(s): Steve French (sfrench@us.ibm.com)6 *7 */8 9#ifndef _CIFSACL_H10#define _CIFSACL_H11 12#include "../common/smbacl.h"13 14#define READ_BIT 0x415#define WRITE_BIT 0x216#define EXEC_BIT 0x117 18#define ACL_OWNER_MASK 070019#define ACL_GROUP_MASK 007020#define ACL_EVERYONE_MASK 000721 22#define UBITSHIFT 623#define GBITSHIFT 324 25/*26 * Security Descriptor length containing DACL with 3 ACEs (one each for27 * owner, group and world).28 */29#define DEFAULT_SEC_DESC_LEN (sizeof(struct smb_ntsd) + \30 sizeof(struct smb_acl) + \31 (sizeof(struct smb_ace) * 4))32 33/*34 * The current SMB3 form of security descriptor is similar to what was used for35 * cifs (see above) but some fields are split, and fields in the struct below36 * matches names of fields to the spec, MS-DTYP (see sections 2.4.5 and37 * 2.4.6). Note that "CamelCase" fields are used in this struct in order to38 * match the MS-DTYP and MS-SMB2 specs which define the wire format.39 */40struct smb3_sd {41 __u8 Revision; /* revision level, MUST be one */42 __u8 Sbz1; /* only meaningful if 'RM' flag set below */43 __le16 Control;44 __le32 OffsetOwner;45 __le32 OffsetGroup;46 __le32 OffsetSacl;47 __le32 OffsetDacl;48} __packed;49 50/* Meaning of 'Control' field flags */51#define ACL_CONTROL_SR 0x8000 /* Self relative */52#define ACL_CONTROL_RM 0x4000 /* Resource manager control bits */53#define ACL_CONTROL_PS 0x2000 /* SACL protected from inherits */54#define ACL_CONTROL_PD 0x1000 /* DACL protected from inherits */55#define ACL_CONTROL_SI 0x0800 /* SACL Auto-Inherited */56#define ACL_CONTROL_DI 0x0400 /* DACL Auto-Inherited */57#define ACL_CONTROL_SC 0x0200 /* SACL computed through inheritance */58#define ACL_CONTROL_DC 0x0100 /* DACL computed through inheritance */59#define ACL_CONTROL_SS 0x0080 /* Create server ACL */60#define ACL_CONTROL_DT 0x0040 /* DACL provided by trusted source */61#define ACL_CONTROL_SD 0x0020 /* SACL defaulted */62#define ACL_CONTROL_SP 0x0010 /* SACL is present on object */63#define ACL_CONTROL_DD 0x0008 /* DACL defaulted */64#define ACL_CONTROL_DP 0x0004 /* DACL is present on object */65#define ACL_CONTROL_GD 0x0002 /* Group was defaulted */66#define ACL_CONTROL_OD 0x0001 /* User was defaulted */67 68/* Meaning of AclRevision flags */69#define ACL_REVISION 0x02 /* See section 2.4.4.1 of MS-DTYP */70#define ACL_REVISION_DS 0x04 /* Additional AceTypes allowed */71 72struct smb3_acl {73 u8 AclRevision; /* revision level */74 u8 Sbz1; /* MBZ */75 __le16 AclSize;76 __le16 AceCount;77 __le16 Sbz2; /* MBZ */78} __packed;79 80/*81 * Used to store the special 'NFS SIDs' used to persist the POSIX uid and gid82 * See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx83 */84struct owner_sid {85 u8 Revision;86 u8 NumAuth;87 u8 Authority[6];88 __le32 SubAuthorities[3];89} __packed;90 91struct owner_group_sids {92 struct owner_sid owner;93 struct owner_sid group;94} __packed;95 96/*97 * Minimum security identifier can be one for system defined Users98 * and Groups such as NULL SID and World or Built-in accounts such99 * as Administrator and Guest and consists of100 * Revision + Num (Sub)Auths + Authority + Domain (one Subauthority)101 */102#define MIN_SID_LEN (1 + 1 + 6 + 4) /* in bytes */103 104/*105 * Minimum security descriptor can be one without any SACL and DACL and can106 * consist of revision, type, and two sids of minimum size for owner and group107 */108#define MIN_SEC_DESC_LEN (sizeof(struct smb_ntsd) + (2 * MIN_SID_LEN))109 110#endif /* _CIFSACL_H */111