module.exports = {
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/* The local file header */
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LOCHDR : 30, // LOC header size
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LOCSIG : 0x04034b50, // "PK\003\004"
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LOCVER : 4, // version needed to extract
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LOCFLG : 6, // general purpose bit flag
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LOCHOW : 8, // compression method
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LOCTIM : 10, // modification time (2 bytes time, 2 bytes date)
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LOCCRC : 14, // uncompressed file crc-32 value
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LOCSIZ : 18, // compressed size
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LOCLEN : 22, // uncompressed size
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LOCNAM : 26, // filename length
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LOCEXT : 28, // extra field length
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/* The Data descriptor */
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EXTSIG : 0x08074b50, // "PK\007\008"
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EXTHDR : 16, // EXT header size
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EXTCRC : 4, // uncompressed file crc-32 value
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EXTSIZ : 8, // compressed size
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EXTLEN : 12, // uncompressed size
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/* The central directory file header */
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CENHDR : 46, // CEN header size
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CENSIG : 0x02014b50, // "PK\001\002"
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CENVEM : 4, // version made by
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CENVER : 6, // version needed to extract
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CENFLG : 8, // encrypt, decrypt flags
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CENHOW : 10, // compression method
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CENTIM : 12, // modification time (2 bytes time, 2 bytes date)
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CENCRC : 16, // uncompressed file crc-32 value
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CENSIZ : 20, // compressed size
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CENLEN : 24, // uncompressed size
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CENNAM : 28, // filename length
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CENEXT : 30, // extra field length
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CENCOM : 32, // file comment length
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CENDSK : 34, // volume number start
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CENATT : 36, // internal file attributes
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CENATX : 38, // external file attributes (host system dependent)
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CENOFF : 42, // LOC header offset
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/* The entries in the end of central directory */
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ENDHDR : 22, // END header size
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ENDSIG : 0x06054b50, // "PK\005\006"
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ENDSUB : 8, // number of entries on this disk
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ENDTOT : 10, // total number of entries
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ENDSIZ : 12, // central directory size in bytes
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ENDOFF : 16, // offset of first CEN header
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ENDCOM : 20, // zip file comment length
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END64HDR : 20, // zip64 END header size
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END64SIG : 0x07064b50, // zip64 Locator signature, "PK\006\007"
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END64START : 4, // number of the disk with the start of the zip64
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END64OFF : 8, // relative offset of the zip64 end of central directory
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END64NUMDISKS : 16, // total number of disks
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ZIP64SIG : 0x06064b50, // zip64 signature, "PK\006\006"
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ZIP64HDR : 56, // zip64 record minimum size
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ZIP64LEAD : 12, // leading bytes at the start of the record, not counted by the value stored in ZIP64SIZE
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ZIP64SIZE : 4, // zip64 size of the central directory record
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ZIP64VEM : 12, // zip64 version made by
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ZIP64VER : 14, // zip64 version needed to extract
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ZIP64DSK : 16, // zip64 number of this disk
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ZIP64DSKDIR : 20, // number of the disk with the start of the record directory
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ZIP64SUB : 24, // number of entries on this disk
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ZIP64TOT : 32, // total number of entries
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ZIP64SIZB : 40, // zip64 central directory size in bytes
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ZIP64OFF : 48, // offset of start of central directory with respect to the starting disk number
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ZIP64EXTRA : 56, // extensible data sector
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/* Compression methods */
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STORED : 0, // no compression
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SHRUNK : 1, // shrunk
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REDUCED1 : 2, // reduced with compression factor 1
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REDUCED2 : 3, // reduced with compression factor 2
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REDUCED3 : 4, // reduced with compression factor 3
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REDUCED4 : 5, // reduced with compression factor 4
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IMPLODED : 6, // imploded
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// 7 reserved for Tokenizing compression algorithm
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DEFLATED : 8, // deflated
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ENHANCED_DEFLATED: 9, // enhanced deflated
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PKWARE : 10,// PKWare DCL imploded
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// 11 reserved by PKWARE
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BZIP2 : 12, // compressed using BZIP2
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// 13 reserved by PKWARE
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LZMA : 14, // LZMA
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// 15-17 reserved by PKWARE
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IBM_TERSE : 18, // compressed using IBM TERSE
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IBM_LZ77 : 19, // IBM LZ77 z
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AES_ENCRYPT : 99, // WinZIP AES encryption method
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/* General purpose bit flag */
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// values can obtained with expression 2**bitnr
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FLG_ENC : 1, // Bit 0: encrypted file
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FLG_COMP1 : 2, // Bit 1, compression option
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FLG_COMP2 : 4, // Bit 2, compression option
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FLG_DESC : 8, // Bit 3, data descriptor
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FLG_ENH : 16, // Bit 4, enhanced deflating
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FLG_PATCH : 32, // Bit 5, indicates that the file is compressed patched data.
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FLG_STR : 64, // Bit 6, strong encryption (patented)
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// Bits 7-10: Currently unused.
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FLG_EFS : 2048, // Bit 11: Language encoding flag (EFS)
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// Bit 12: Reserved by PKWARE for enhanced compression.
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// Bit 13: encrypted the Central Directory (patented).
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// Bits 14-15: Reserved by PKWARE.
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FLG_MSK : 4096, // mask header values
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/* Load type */
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FILE : 2,
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BUFFER : 1,
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NONE : 0,
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/* 4.5 Extensible data fields */
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EF_ID : 0,
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EF_SIZE : 2,
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/* Header IDs */
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ID_ZIP64 : 0x0001,
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ID_AVINFO : 0x0007,
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ID_PFS : 0x0008,
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ID_OS2 : 0x0009,
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ID_NTFS : 0x000a,
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ID_OPENVMS : 0x000c,
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ID_UNIX : 0x000d,
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ID_FORK : 0x000e,
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ID_PATCH : 0x000f,
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ID_X509_PKCS7 : 0x0014,
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ID_X509_CERTID_F : 0x0015,
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ID_X509_CERTID_C : 0x0016,
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ID_STRONGENC : 0x0017,
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ID_RECORD_MGT : 0x0018,
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ID_X509_PKCS7_RL : 0x0019,
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ID_IBM1 : 0x0065,
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ID_IBM2 : 0x0066,
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ID_POSZIP : 0x4690,
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EF_ZIP64_OR_32 : 0xffffffff,
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EF_ZIP64_OR_16 : 0xffff,
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EF_ZIP64_SUNCOMP : 0,
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EF_ZIP64_SCOMP : 8,
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EF_ZIP64_RHO : 16,
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EF_ZIP64_DSN : 24
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};
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