Add PKZIP appendix A and B

2026-09-22 22:57:11 +00:00 · 2024-04-28 02:02:58 -04:00
parent c4f14854c2
commit 6bc948784a
4 changed files with 853 additions and 1 deletions
--- a/PKZIP/AS400ExtraFieldAttribute.cs
+++ b/PKZIP/AS400ExtraFieldAttribute.cs
@@ -0,0 +1,26 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// AS/400 Extra Field (0x0065) Attribute [APPENDIX A]
+    /// </summary>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class AS400ExtraFieldAttribute : ExtensibleDataField
+    {
+        /// <summary>
+        /// Field length including length
+        /// </summary>
+        /// <remarks>Big-endian</remarks>
+        public ushort FieldLength { get; set; }
+
+        /// <summary>
+        /// Field code
+        /// </summary>
+        public AS400ExtraFieldAttributeFieldCode FieldCode { get; set; }
+
+        /// <summary>
+        /// Data
+        /// </summary>
+        /// <remarks>Variable byte length based on field code</remarks>
+        public byte[]? Data { get; set; }
+    }
+}
--- a/PKZIP/Enums.cs
+++ b/PKZIP/Enums.cs
@@ -207,6 +207,87 @@ namespace SabreTools.Models.PKZIP
        Reserved31 = 0b1000_0000_0000_0000_0000_0000_0000_0000,
    }

+    public enum AS400ExtraFieldAttributeFieldCode : ushort
+    {
+        /// <summary>
+        /// Source type i.e. CLP etc
+        /// </summary>
+        SourceType = 0x4001,
+
+        /// <summary>
+        /// The text description of the library
+        /// </summary>
+        LibraryTextDescription = 0x4002,
+
+        /// <summary>
+        /// The text description of the file
+        /// </summary>
+        FileTextDescription = 0x4003,
+
+        /// <summary>
+        /// The text description of the member
+        /// </summary>
+        MemberTextDescription = 0x4004,
+
+        /// <summary>
+        /// x'F0' or 0 is PF-DTA,  x'F1' or 1 is PF_SRC
+        /// </summary>
+        PFType = 0x4005,
+
+        /// <summary>
+        /// Database Type Code
+        /// </summary>
+        /// <remarks>1 byte</remarks>
+        DatabaseTypeCode = 0x4007,
+
+        /// <summary>
+        /// Database file and fields definition
+        /// </summary>
+        DatabaseFileAndFieldsDefinition = 0x4008,
+
+        /// <summary>
+        /// GZIP file type
+        /// </summary>
+        /// <remarks>2 bytes</remarks>
+        GZIPFileType = 0x4009,
+
+        /// <summary>
+        /// IFS code page
+        /// </summary>
+        /// <remarks>2 bytes</remarks>
+        IFSCodePage = 0x400B,
+
+        /// <summary>
+        /// IFS Time of last file status change
+        /// </summary>
+        /// <remarks>4 bytes</remarks>
+        IFSTimeOfLastFileStatusChange = 0x400C,
+
+        /// <summary>
+        /// IFS Access Time
+        /// </summary>
+        /// <remarks>4 bytes</remarks>
+        IFSAccessTime = 0x4001,
+
+        /// <summary>
+        /// IFS Modification time
+        /// </summary>
+        /// <remarks>4 bytes</remarks>
+        IFSModificationTime = 0x4001,
+
+        /// <summary>
+        /// Length of the records in the file
+        /// </summary>
+        /// <remarks>2 bytes</remarks>
+        RecordsLength = 0x4001,
+
+        /// <summary>
+        /// GZIP two words
+        /// </summary>
+        /// <remarks>8 bytes</remarks>
+        GZIPTwoWords = 0x4001,
+    }
+
    public enum CompressionMethod : ushort
    {
        /// <summary>
@@ -920,4 +1001,723 @@ namespace SabreTools.Models.PKZIP
         value is provided for mainframe data transfer support.
        */
    }
+
+    public enum ZOSExtraFieldAttributeFieldCode : ushort
+    {
+        /// <summary>
+        /// File Type
+        /// <summary>
+        /// </remarks>2 bytes</remarks>
+        FileType = 0x0001,
+
+        /// <summary>
+        /// NonVSAM Record Format
+        /// <summary>
+        /// </remarks>1 byte</remarks>
+        NonVSAMRecordFormat = 0x0002,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        /// </remarks></remarks>
+        Reserved03 = 0x0003,
+
+        /// <summary>
+        /// NonVSAM Block Size
+        /// <summary>
+        /// </remarks>2 bytes Big Endian</remarks>
+        NonVSAMBlockSize = 0x0004,
+
+        /// <summary>
+        /// Primary Space Allocation
+        /// <summary>
+        /// </remarks>3 bytes Big Endian</remarks>
+        PrimarySpaceAllocation = 0x0005,
+
+        /// <summary>
+        /// Secondary Space Allocation
+        /// <summary>
+        /// </remarks>3 bytes Big Endian</remarks>
+        SecondarySpaceAllocation = 0x0006,
+
+        /// <summary>
+        /// Space Allocation Type1 byte flag
+        /// <summary>
+        /// </remarks>1 byte</remarks>
+        SpaceAllocationType1ByteFlag = 0x0007,
+
+        /// <summary>
+        /// Modification Date
+        /// <summary>
+        /// </remarks>Retired with PKZIP 5.0 +</remarks>
+        ModificationDate = 0x0008,
+
+        /// <summary>
+        /// Expiration Date
+        /// <summary>
+        /// </remarks>Retired with PKZIP 5.0 +</remarks>
+        ExpirationDate = 0x0009,
+
+        /// <summary>
+        /// PDS Directory Block Allocation
+        /// <summary>
+        /// </remarks>3 bytes Big Endian binary value</remarks>
+        PDSDirectoryBlockAllocation = 0x000A,
+
+        /// <summary>
+        /// NonVSAM Volume List
+        /// <summary>
+        /// </remarks>variable</remarks>
+        NonVSAMVolumeList = 0x000B,
+
+        /// <summary>
+        /// UNIT Reference
+        /// <summary>
+        /// </remarks>Retired with PKZIP 5.0 +</remarks>
+        UNITReference = 0x000C,
+
+        /// <summary>
+        /// DF/SMS Management Class
+        /// <summary>
+        /// </remarks>8 bytes EBCDIC Text Value</remarks>
+        DFSMSManagementClass = 0x000D,
+
+        /// <summary>
+        /// DF/SMS Storage Class
+        /// <summary>
+        /// </remarks>8 bytes EBCDIC Text Value</remarks>
+        DFSMSStorageClass = 0x000E,
+
+        /// <summary>
+        /// DF/SMS Data Class
+        /// <summary>
+        /// </remarks>8 bytes EBCDIC Text Value</remarks>
+        DFSMSDataClass = 0x000F,
+
+        /// <summary>
+        /// PDS/PDSE Member Info
+        /// <summary>
+        /// </remarks>30 bytes</remarks>
+        PDSPDSEMemberInfo = 0x0010,
+
+        /// <summary>
+        /// VSAM sub-filetype
+        /// <summary>
+        /// </remarks>2 bytes</remarks>
+        VSAMSubFiletype = 0x0011,
+
+        /// <summary>
+        /// VSAM LRECL
+        /// <summary>
+        /// </remarks>13 bytes EBCDIC "(num_avg num_max)"</remarks>
+        VSAMLRECL = 0x0012,
+
+        /// <summary>
+        /// VSAM Cluster Name
+        /// <summary>
+        /// </remarks>Retired with PKZIP 5.0 +</remarks>
+        VSAMClusterName = 0x0013,
+
+        /// <summary>
+        /// VSAM KSDS Key Information
+        /// <summary>
+        /// </remarks>13 bytes EBCDIC "(num_length num_position)"</remarks>
+        VSAMKSDSKeyInformation = 0x0014,
+
+        /// <summary>
+        /// VSAM Average LRECL
+        /// <summary>
+        /// </remarks>5 bytes EBCDIC num_value padded with blanks</remarks>
+        VSAMAverageLRECL = 0x0015,
+
+        /// <summary>
+        /// VSAM Maximum LRECL
+        /// <summary>
+        /// </remarks>5 bytes EBCDIC num_value padded with blanks</remarks>
+        VSAMMaximumLRECL = 0x0016,
+
+        /// <summary>
+        /// VSAM KSDS Key Length
+        /// <summary>
+        /// </remarks>5 bytes EBCDIC num_value padded with blanks</remarks>
+        VSAMKSDSKeyLength = 0x0017,
+
+        /// <summary>
+        /// VSAM KSDS Key Position
+        /// <summary>
+        /// </remarks>5 bytes EBCDIC num_value padded with blanks</remarks>
+        VSAMKSDSKeyPosition = 0x0018,
+
+        /// <summary>
+        /// VSAM Data Name
+        /// <summary>
+        /// </remarks>1-44 bytes EBCDIC text string</remarks>
+        VSAMDataName = 0x0019,
+
+        /// <summary>
+        /// VSAM KSDS Index Name
+        /// <summary>
+        /// </remarks>1-44 bytes EBCDIC text string</remarks>
+        VSAMKSDSIndexName = 0x001A,
+
+        /// <summary>
+        /// VSAM Catalog Name
+        /// <summary>
+        /// </remarks>1-44 bytes EBCDIC text string</remarks>
+        VSAMCatalogName = 0x001B,
+
+        /// <summary>
+        /// VSAM Data Space Type
+        /// <summary>
+        /// </remarks>9 bytes EBCDIC text string</remarks>
+        VSAMDataSpaceType = 0x001C,
+
+        /// <summary>
+        /// VSAM Data Space Primary
+        /// <summary>
+        /// </remarks>9 bytes EBCDIC num_value left-justified</remarks>
+        VSAMDataSpacePrimary = 0x001D,
+
+        /// <summary>
+        /// VSAM Data Space Secondary
+        /// <summary>
+        /// </remarks>9 bytes EBCDIC num_value left-justified</remarks>
+        VSAMDataSpaceSecondary = 0x001E,
+
+        /// <summary>
+        /// VSAM Data Volume List
+        /// <summary>
+        /// </remarks>variable EBCDIC text list of 6-character Volume IDs</remarks>
+        VSAMDataVolumeList = 0x001F,
+
+        /// <summary>
+        /// VSAM Data Buffer Space
+        /// <summary>
+        /// </remarks>8 bytes EBCDIC num_value left-justified</remarks>
+        VSAMDataBufferSpace = 0x0020,
+
+        /// <summary>
+        /// VSAM Data CISIZE
+        /// <summary>
+        /// </remarks>5 bytes EBCDIC num_value left-justified</remarks>
+        VSAMDataCISIZE = 0x0021,
+
+        /// <summary>
+        /// VSAM Erase Flag
+        /// <summary>
+        /// </remarks>1 byte flag</remarks>
+        VSAMEraseFlag = 0x0022,
+
+        /// <summary>
+        /// VSAM Free CI %
+        /// <summary>
+        /// </remarks>3 bytes EBCDIC num_value left-justified</remarks>
+        VSAMFreeCIPercentage = 0x0023,
+
+        /// <summary>
+        /// VSAM Free CA %
+        /// <summary>
+        /// </remarks>3 bytes EBCDIC num_value left-justified</remarks>
+        VSAMFreeCAPercentage = 0x0024,
+
+        /// <summary>
+        /// VSAM Index Volume List
+        /// <summary>
+        /// </remarks>variable EBCDIC text list of 6-character Volume IDs</remarks>
+        VSAMIndexVolumeList = 0x0025,
+
+        /// <summary>
+        /// VSAM Ordered Flag
+        /// <summary>
+        /// </remarks>1 byte flag</remarks>
+        VSAMOrderedFlag = 0x0026,
+
+        /// <summary>
+        /// VSAM REUSE Flag
+        /// <summary>
+        /// </remarks>1 byte flag</remarks>
+        VSAMREUSEFlag = 0x0027,
+
+        /// <summary>
+        /// VSAM SPANNED Flag
+        /// <summary>
+        /// </remarks>1 byte flag</remarks>
+        VSAMSPANNEDFlag = 0x0028,
+
+        /// <summary>
+        /// VSAM Recovery Flag
+        /// <summary>
+        /// </remarks>1 byte flag</remarks>
+        VSAMRecoveryFlag = 0x0029,
+
+        /// <summary>
+        /// VSAM  WRITECHK  Flag
+        /// <summary>
+        /// </remarks>1 byte flag</remarks>
+        VSAMWRITECHKFlag = 0x002A,
+
+        /// <summary>
+        /// VSAM Cluster/Data SHROPTS
+        /// <summary>
+        /// </remarks>3 bytes EBCDIC "n,y"</remarks>
+        CSAMClusterDataSHROPTS = 0x002B,
+
+        /// <summary>
+        /// VSAM Index SHROPTS
+        /// <summary>
+        /// </remarks>3 bytes EBCDIC "n,y"</remarks>
+        VSAMIndexSHROPTS = 0x002C,
+
+        /// <summary>
+        /// VSAM Index Space Type
+        /// <summary>
+        /// </remarks>9 bytes EBCDIC text string</remarks>
+        VSAMIndexSpaceType = 0x002D,
+
+        /// <summary>
+        /// VSAM Index Space Primary
+        /// <summary>
+        /// </remarks>9 bytes EBCDIC num_value left-justified</remarks>
+        VSAMIndexSpacePrimary = 0x002E,
+
+        /// <summary>
+        /// VSAM Index Space Secondary
+        /// <summary>
+        /// </remarks>9 bytes EBCDIC num_value left-justified</remarks>
+        VSAMIndexSpaceSecondary = 0x002F,
+
+        /// <summary>
+        /// VSAM Index CISIZE
+        /// <summary>
+        /// </remarks>v</remarks>
+        VSAMIndexCISIZE = 0x0030,
+
+        /// <summary>
+        /// VSAM Index IMBED
+        /// <summary>
+        /// </remarks>1 byte flag</remarks>
+        VSAMIndexIMBED = 0x0031,
+
+        /// <summary>
+        /// VSAM Index Ordered Flag
+        /// <summary>
+        /// </remarks>1 byte flag</remarks>
+        VSAMIndexOrderedFlag = 0x0032,
+
+        /// <summary>
+        /// VSAM REPLICATE Flag
+        /// <summary>
+        /// </remarks>1 byte flag</remarks>
+        VSAMREPLICATEFlag = 0x0033,
+
+        /// <summary>
+        /// VSAM Index REUSE Flag
+        /// <summary>
+        /// </remarks>1 byte flag</remarks>
+        VSAMIndexREUSEFlag = 0x0034,
+
+        /// <summary>
+        /// VSAM Index WRITECHK Flag
+        /// <summary>
+        /// </remarks>1 byte flag Retired with PKZIP 5.0 +</remarks>
+        VSAMIndexWRITECHKFlag = 0x0035,
+
+        /// <summary>
+        /// VSAM Owner
+        /// <summary>
+        /// </remarks>8 bytes EBCDIC text string</remarks>
+        VSAMOwner = 0x0036,
+
+        /// <summary>
+        /// VSAM Index Owner
+        /// <summary>
+        /// </remarks>8 bytes EBCDIC text string</remarks>
+        VSAMIndexOwner = 0x0037,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved38 = 0x0038,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved39 = 0x0039,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved3A = 0x003A,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved3B = 0x003B,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved3C = 0x003C,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved3D = 0x003D,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved3E = 0x003E,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        ReservedeF = 0x003F,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved40 = 0x0040,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved41 = 0x0041,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved42 = 0x0042,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved43 = 0x0043,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved44 = 0x0044,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved45 = 0x0045,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved46 = 0x0046,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved47 = 0x0047,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved48 = 0x0048,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved49 = 0x0049,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved4A = 0x004A,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved4B = 0x004B,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved4C = 0x004C,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved4D = 0x004D,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved4E = 0x004E,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved4F = 0x004F,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved50 = 0x0050,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved51 = 0x0051,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved52 = 0x0052,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved53 = 0x0053,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved54 = 0x0054,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved55 = 0x0055,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved56 = 0x0056,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved57 = 0x0057,
+
+        /// <summary>
+        /// PDS/PDSE Member TTR Info
+        /// <summary>
+        /// </remarks>6 bytes  Big Endian</remarks>
+        PDSPDSEMemberTTRInfo = 0x0058,
+
+        /// <summary>
+        /// PDS 1st LMOD Text TTR
+        /// <summary>
+        /// </remarks>3 bytes  Big Endian</remarks>
+        PDSFirstLMODTextTTR = 0x0059,
+
+        /// <summary>
+        /// PDS LMOD EP Rec #
+        /// <summary>
+        /// </remarks>4 bytes  Big Endian</remarks>
+        PDSLMODEPRecNum = 0x005A,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved5B = 0x005B,
+
+        /// <summary>
+        /// Max Length of records
+        /// <summary>
+        /// </remarks>2 bytes  Big Endian</remarks>
+        MaxLengthOfRecords = 0x005C,
+
+        /// <summary>
+        /// PDSE Flag
+        /// <summary>
+        /// </remarks>1 byte flag</remarks>
+        PDSEFlag = 0x005D,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved5E = 0x005E,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved5F = 0x005F,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved60 = 0x0060,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved61 = 0x0061,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved62 = 0x0062,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved63 = 0x0063,
+
+        /// <summary>
+        /// Reserved
+        /// <summary>
+        Reserved64 = 0x0064,
+
+        /// <summary>
+        /// Last Date Referenced
+        /// <summary>
+        /// </remarks>4 bytes  Packed Hex "yyyymmdd"</remarks>
+        LastDateReferenced = 0x0065,
+
+        /// <summary>
+        /// Date Created
+        /// <summary>
+        /// </remarks>4 bytes  Packed Hex "yyyymmdd"</remarks>
+        DateCreated = 0x0066,
+
+        /// <summary>
+        /// GZIP two words
+        /// <summary>
+        /// </remarks>8 bytes</remarks>
+        GZIPTwoWords = 0x0068,
+
+        /// <summary>
+        /// Extended NOTE Location
+        /// <summary>
+        /// </remarks>12 bytes Big Endian</remarks>
+        ExtendedNOTELocation = 0x0071,
+
+        /// <summary>
+        /// Archive device UNIT
+        /// <summary>
+        /// </remarks>6 bytes  EBCDIC</remarks>
+        ArchiveDeviceUNIT = 0x0072,
+
+        /// <summary>
+        /// Archive 1st Volume
+        /// <summary>
+        /// </remarks>6 bytes  EBCDIC</remarks>
+        ArchiveFirstVolume = 0x0073,
+
+        /// <summary>
+        /// Archive 1st VOL File Seq#
+        /// <summary>
+        /// </remarks>2 bytes  Binary</remarks>
+        ArchiveFirstVolFileSeqNum = 0x0074,
+
+        /// <summary>
+        /// Native I/O Flags
+        /// <summary>
+        /// </remarks>2 bytes</remarks>
+        NativeIOFlags = 0x0075,
+
+        /// <summary>
+        /// Unix File Type
+        /// <summary>
+        /// </remarks>1 byte   enumerated</remarks>
+        UnixFileType = 0x0081,
+
+        /// <summary>
+        /// Unix File Format
+        /// <summary>
+        /// </remarks>1 byte   enumerated</remarks>
+        UnixFileFormat = 0x0082,
+
+        /// <summary>
+        /// Unix File Character Set Tag Info
+        /// <summary>
+        /// </remarks>4 bytes</remarks>
+        UnixFileCharacterSetTagInfo = 0x0083,
+
+        /// <summary>
+        /// ZIP Environmental Processing Info
+        /// <summary>
+        /// </remarks>4 bytes</remarks>
+        ZIPEnvironmentalProcessingInfo = 0x0090,
+
+        /// <summary>
+        /// EAV EATTR Flags
+        /// <summary>
+        /// </remarks>1 byte</remarks>
+        EAVEATTRFlags = 0x0091,
+
+        /// <summary>
+        /// DSNTYPE Flags
+        /// <summary>
+        /// </remarks>1 byte</remarks>
+        DSNTYPEFlags = 0x0092,
+
+        /// <summary>
+        /// Total Space Allocation (Cyls)
+        /// <summary>
+        /// </remarks>4 bytes  Big Endian</remarks>
+        TotalSpaceAllocationCyls = 0x0093,
+
+        /// <summary>
+        /// NONVSAM DSORG
+        /// <summary>
+        /// </remarks>2 bytes</remarks>
+        NONVSAMDSORG = 0x009D,
+
+        /// <summary>
+        /// Program Virtual Object Info
+        /// <summary>
+        /// </remarks>3 bytes</remarks>
+        ProgramVirtualObjectInfo = 0x009E,
+
+        /// <summary>
+        /// Encapsulated file Info
+        /// <summary>
+        /// </remarks>9 bytes</remarks>
+        EncapsulatedFileInfo = 0x009F,
+
+        /// <summary>
+        /// Cluster Log
+        /// <summary>
+        /// </remarks>4 bytes  Binary</remarks>
+        ClusterLog = 0x00A2,
+
+        /// <summary>
+        /// Cluster LSID Length
+        /// <summary>
+        /// </remarks>4 bytes  Binary</remarks>
+        ClusterLSIDLength = 0x00A3,
+
+        /// <summary>
+        /// Cluster LSID
+        /// <summary>
+        /// </remarks>26 bytes  EBCDIC</remarks>
+        ClusterLSID = 0x00A4,
+
+        /// <summary>
+        /// Unix File Creation Time
+        /// <summary>
+        /// </remarks>4 bytes</remarks>
+        UnixFileCreationTime = 0x400C,
+
+        /// <summary>
+        /// Unix File Access Time
+        /// <summary>
+        /// </remarks>4 bytes</remarks>
+        UnixFileAccessTime = 0x400D,
+
+        /// <summary>
+        /// Unix File Modification time
+        /// <summary>
+        /// </remarks>4 bytes</remarks>
+        UnixFileModificationTime = 0x400E,
+
+        /// <summary>
+        /// IBMCMPSC Compression Info
+        /// <summary>
+        /// </remarks>variable</remarks>
+        IBMCMPSCCompressionInfo = 0x4101,
+
+        /// <summary>
+        /// IBMCMPSC Compression Size
+        /// <summary>
+        /// </remarks>8 bytes  Big Endian</remarks>
+        IBMCMPSCCompressionSize = 0x4102,
+    }
 }
--- a/PKZIP/PolicyKeyDataRecordRecordExtraField.cs
+++ b/PKZIP/PolicyKeyDataRecordRecordExtraField.cs
@@ -1,7 +1,7 @@
 namespace SabreTools.Models.PKZIP
 {
    /// <summary>
-    /// TThe following is the layout of the Policy Key Data "extra" block.
+    /// The following is the layout of the Policy Key Data "extra" block.
    /// TData is a variable length, variable content field.  It holds
    /// information about encryptions and/or encryption key sources.
    /// Contact PKWARE for information on current TData structures.
--- a/PKZIP/ZOSExtraFieldAttribute.cs
+++ b/PKZIP/ZOSExtraFieldAttribute.cs
@@ -0,0 +1,26 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// z/OS Extra Field (0x0065) Attribute [APPENDIX B]
+    /// </summary>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class ZOSExtraFieldAttribute : ExtensibleDataField
+    {
+        /// <summary>
+        /// Field length including length
+        /// </summary>
+        /// <remarks>Big-endian</remarks>
+        public ushort FieldLength { get; set; }
+
+        /// <summary>
+        /// Field code
+        /// </summary>
+        public ZOSExtraFieldAttributeFieldCode FieldCode { get; set; }
+
+        /// <summary>
+        /// Data
+        /// </summary>
+        /// <remarks>Variable byte length based on field code</remarks>
+        public byte[]? Data { get; set; }
+    }
+}