/* * Security Descriptor length containing DACL with 3 ACEs (one each for * owner, group and world).
*/ #define DEFAULT_SEC_DESC_LEN (sizeof(struct smb_ntsd) + \ sizeof(struct smb_acl) + \
(sizeof(struct smb_ace) * 4))
/* * The current SMB3 form of security descriptor is similar to what was used for * cifs (see above) but some fields are split, and fields in the struct below * matches names of fields to the spec, MS-DTYP (see sections 2.4.5 and * 2.4.6). Note that "CamelCase" fields are used in this struct in order to * match the MS-DTYP and MS-SMB2 specs which define the wire format.
*/ struct smb3_sd {
__u8 Revision; /* revision level, MUST be one */
__u8 Sbz1; /* only meaningful if 'RM' flag set below */
__le16 Control;
__le32 OffsetOwner;
__le32 OffsetGroup;
__le32 OffsetSacl;
__le32 OffsetDacl;
} __packed;
/* Meaning of 'Control' field flags */ #define ACL_CONTROL_SR 0x8000 /* Self relative */ #define ACL_CONTROL_RM 0x4000 /* Resource manager control bits */ #define ACL_CONTROL_PS 0x2000 /* SACL protected from inherits */ #define ACL_CONTROL_PD 0x1000 /* DACL protected from inherits */ #define ACL_CONTROL_SI 0x0800 /* SACL Auto-Inherited */ #define ACL_CONTROL_DI 0x0400 /* DACL Auto-Inherited */ #define ACL_CONTROL_SC 0x0200 /* SACL computed through inheritance */ #define ACL_CONTROL_DC 0x0100 /* DACL computed through inheritance */ #define ACL_CONTROL_SS 0x0080 /* Create server ACL */ #define ACL_CONTROL_DT 0x0040 /* DACL provided by trusted source */ #define ACL_CONTROL_SD 0x0020 /* SACL defaulted */ #define ACL_CONTROL_SP 0x0010 /* SACL is present on object */ #define ACL_CONTROL_DD 0x0008 /* DACL defaulted */ #define ACL_CONTROL_DP 0x0004 /* DACL is present on object */ #define ACL_CONTROL_GD 0x0002 /* Group was defaulted */ #define ACL_CONTROL_OD 0x0001 /* User was defaulted */
/* Meaning of AclRevision flags */ #define ACL_REVISION 0x02 /* See section 2.4.4.1 of MS-DTYP */ #define ACL_REVISION_DS 0x04 /* Additional AceTypes allowed */
/* * Minimum security identifier can be one for system defined Users * and Groups such as NULL SID and World or Built-in accounts such * as Administrator and Guest and consists of * Revision + Num (Sub)Auths + Authority + Domain (one Subauthority)
*/ #define MIN_SID_LEN (1 + 1 + 6 + 4) /* in bytes */
/* * Minimum security descriptor can be one without any SACL and DACL and can * consist of revision, type, and two sids of minimum size for owner and group
*/ #define MIN_SEC_DESC_LEN (sizeof(struct smb_ntsd) + (2 * MIN_SID_LEN))
#endif/* _CIFSACL_H */
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