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-rw-r--r--fs/smb/client/cifsacl.h199
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diff --git a/fs/smb/client/cifsacl.h b/fs/smb/client/cifsacl.h
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+/* SPDX-License-Identifier: LGPL-2.1 */
+/*
+ *
+ * Copyright (c) International Business Machines Corp., 2007
+ * Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ */
+
+#ifndef _CIFSACL_H
+#define _CIFSACL_H
+
+#define NUM_AUTHS (6) /* number of authority fields */
+#define SID_MAX_SUB_AUTHORITIES (15) /* max number of sub authority fields */
+
+#define READ_BIT 0x4
+#define WRITE_BIT 0x2
+#define EXEC_BIT 0x1
+
+#define ACL_OWNER_MASK 0700
+#define ACL_GROUP_MASK 0070
+#define ACL_EVERYONE_MASK 0007
+
+#define UBITSHIFT 6
+#define GBITSHIFT 3
+
+#define ACCESS_ALLOWED 0
+#define ACCESS_DENIED 1
+
+#define SIDOWNER 1
+#define SIDGROUP 2
+
+/*
+ * Security Descriptor length containing DACL with 3 ACEs (one each for
+ * owner, group and world).
+ */
+#define DEFAULT_SEC_DESC_LEN (sizeof(struct cifs_ntsd) + \
+ sizeof(struct cifs_acl) + \
+ (sizeof(struct cifs_ace) * 4))
+
+/*
+ * Maximum size of a string representation of a SID:
+ *
+ * The fields are unsigned values in decimal. So:
+ *
+ * u8: max 3 bytes in decimal
+ * u32: max 10 bytes in decimal
+ *
+ * "S-" + 3 bytes for version field + 15 for authority field + NULL terminator
+ *
+ * For authority field, max is when all 6 values are non-zero and it must be
+ * represented in hex. So "-0x" + 12 hex digits.
+ *
+ * Add 11 bytes for each subauthority field (10 bytes each + 1 for '-')
+ */
+#define SID_STRING_BASE_SIZE (2 + 3 + 15 + 1)
+#define SID_STRING_SUBAUTH_SIZE (11) /* size of a single subauth string */
+
+struct cifs_ntsd {
+ __le16 revision; /* revision level */
+ __le16 type;
+ __le32 osidoffset;
+ __le32 gsidoffset;
+ __le32 sacloffset;
+ __le32 dacloffset;
+} __attribute__((packed));
+
+struct cifs_sid {
+ __u8 revision; /* revision level */
+ __u8 num_subauth;
+ __u8 authority[NUM_AUTHS];
+ __le32 sub_auth[SID_MAX_SUB_AUTHORITIES]; /* sub_auth[num_subauth] */
+} __attribute__((packed));
+
+/* size of a struct cifs_sid, sans sub_auth array */
+#define CIFS_SID_BASE_SIZE (1 + 1 + NUM_AUTHS)
+
+struct cifs_acl {
+ __le16 revision; /* revision level */
+ __le16 size;
+ __le32 num_aces;
+} __attribute__((packed));
+
+/* ACE types - see MS-DTYP 2.4.4.1 */
+#define ACCESS_ALLOWED_ACE_TYPE 0x00
+#define ACCESS_DENIED_ACE_TYPE 0x01
+#define SYSTEM_AUDIT_ACE_TYPE 0x02
+#define SYSTEM_ALARM_ACE_TYPE 0x03
+#define ACCESS_ALLOWED_COMPOUND_ACE_TYPE 0x04
+#define ACCESS_ALLOWED_OBJECT_ACE_TYPE 0x05
+#define ACCESS_DENIED_OBJECT_ACE_TYPE 0x06
+#define SYSTEM_AUDIT_OBJECT_ACE_TYPE 0x07
+#define SYSTEM_ALARM_OBJECT_ACE_TYPE 0x08
+#define ACCESS_ALLOWED_CALLBACK_ACE_TYPE 0x09
+#define ACCESS_DENIED_CALLBACK_ACE_TYPE 0x0A
+#define ACCESS_ALLOWED_CALLBACK_OBJECT_ACE_TYPE 0x0B
+#define ACCESS_DENIED_CALLBACK_OBJECT_ACE_TYPE 0x0C
+#define SYSTEM_AUDIT_CALLBACK_ACE_TYPE 0x0D
+#define SYSTEM_ALARM_CALLBACK_ACE_TYPE 0x0E /* Reserved */
+#define SYSTEM_AUDIT_CALLBACK_OBJECT_ACE_TYPE 0x0F
+#define SYSTEM_ALARM_CALLBACK_OBJECT_ACE_TYPE 0x10 /* reserved */
+#define SYSTEM_MANDATORY_LABEL_ACE_TYPE 0x11
+#define SYSTEM_RESOURCE_ATTRIBUTE_ACE_TYPE 0x12
+#define SYSTEM_SCOPED_POLICY_ID_ACE_TYPE 0x13
+
+/* ACE flags */
+#define OBJECT_INHERIT_ACE 0x01
+#define CONTAINER_INHERIT_ACE 0x02
+#define NO_PROPAGATE_INHERIT_ACE 0x04
+#define INHERIT_ONLY_ACE 0x08
+#define INHERITED_ACE 0x10
+#define SUCCESSFUL_ACCESS_ACE_FLAG 0x40
+#define FAILED_ACCESS_ACE_FLAG 0x80
+
+struct cifs_ace {
+ __u8 type; /* see above and MS-DTYP 2.4.4.1 */
+ __u8 flags;
+ __le16 size;
+ __le32 access_req;
+ struct cifs_sid sid; /* ie UUID of user or group who gets these perms */
+} __attribute__((packed));
+
+/*
+ * 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 inheritence */
+#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 */
+
+struct smb3_acl {
+ u8 AclRevision; /* revision level */
+ u8 Sbz1; /* MBZ */
+ __le16 AclSize;
+ __le16 AceCount;
+ __le16 Sbz2; /* MBZ */
+} __packed;
+
+/*
+ * Used to store the special 'NFS SIDs' used to persist the POSIX uid and gid
+ * See http://technet.microsoft.com/en-us/library/hh509017(v=ws.10).aspx
+ */
+struct owner_sid {
+ u8 Revision;
+ u8 NumAuth;
+ u8 Authority[6];
+ __le32 SubAuthorities[3];
+} __packed;
+
+struct owner_group_sids {
+ struct owner_sid owner;
+ struct owner_sid group;
+} __packed;
+
+/*
+ * 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 cifs_ntsd) + (2 * MIN_SID_LEN))
+
+#endif /* _CIFSACL_H */