diff options
Diffstat (limited to 'node_modules/adm-zip/headers/entryHeader.js')
| -rw-r--r-- | node_modules/adm-zip/headers/entryHeader.js | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/node_modules/adm-zip/headers/entryHeader.js b/node_modules/adm-zip/headers/entryHeader.js new file mode 100644 index 000000000..a29c70f15 --- /dev/null +++ b/node_modules/adm-zip/headers/entryHeader.js @@ -0,0 +1,261 @@ +var Utils = require("../util"),
+ Constants = Utils.Constants;
+
+/* The central directory file header */
+module.exports = function () {
+ var _verMade = 0x0A,
+ _version = 0x0A,
+ _flags = 0,
+ _method = 0,
+ _time = 0,
+ _crc = 0,
+ _compressedSize = 0,
+ _size = 0,
+ _fnameLen = 0,
+ _extraLen = 0,
+
+ _comLen = 0,
+ _diskStart = 0,
+ _inattr = 0,
+ _attr = 0,
+ _offset = 0;
+
+ var _dataHeader = {};
+
+ function setTime(val) {
+ var val = new Date(val);
+ _time = (val.getFullYear() - 1980 & 0x7f) << 25 // b09-16 years from 1980
+ | (val.getMonth() + 1) << 21 // b05-08 month
+ | val.getDay() << 16 // b00-04 hour
+
+ // 2 bytes time
+ | val.getHours() << 11 // b11-15 hour
+ | val.getMinutes() << 5 // b05-10 minute
+ | val.getSeconds() >> 1; // b00-04 seconds divided by 2
+ }
+
+ setTime(+new Date());
+
+ return {
+ get made () { return _verMade; },
+ set made (val) { _verMade = val; },
+
+ get version () { return _version; },
+ set version (val) { _version = val },
+
+ get flags () { return _flags },
+ set flags (val) { _flags = val; },
+
+ get method () { return _method; },
+ set method (val) { _method = val; },
+
+ get time () { return new Date(
+ ((_time >> 25) & 0x7f) + 1980,
+ ((_time >> 21) & 0x0f) - 1,
+ (_time >> 16) & 0x1f,
+ (_time >> 11) & 0x1f,
+ (_time >> 5) & 0x3f,
+ (_time & 0x1f) << 1
+ );
+ },
+ set time (val) {
+ setTime(val);
+ },
+
+ get crc () { return _crc; },
+ set crc (val) { _crc = val; },
+
+ get compressedSize () { return _compressedSize; },
+ set compressedSize (val) { _compressedSize = val; },
+
+ get size () { return _size; },
+ set size (val) { _size = val; },
+
+ get fileNameLength () { return _fnameLen; },
+ set fileNameLength (val) { _fnameLen = val; },
+
+ get extraLength () { return _extraLen },
+ set extraLength (val) { _extraLen = val; },
+
+ get commentLength () { return _comLen },
+ set commentLength (val) { _comLen = val },
+
+ get diskNumStart () { return _diskStart },
+ set diskNumStart (val) { _diskStart = val },
+
+ get inAttr () { return _inattr },
+ set inAttr (val) { _inattr = val },
+
+ get attr () { return _attr },
+ set attr (val) { _attr = val },
+
+ get offset () { return _offset },
+ set offset (val) { _offset = val },
+
+ get encripted () { return (_flags & 1) == 1 },
+
+ get entryHeaderSize () {
+ return Constants.CENHDR + _fnameLen + _extraLen + _comLen;
+ },
+
+ get realDataOffset () {
+ return _offset + Constants.LOCHDR + _dataHeader.fnameLen + _dataHeader.extraLen;
+ },
+
+ get dataHeader () {
+ return _dataHeader;
+ },
+
+ loadDataHeaderFromBinary : function(/*Buffer*/input) {
+ var data = input.slice(_offset, _offset + Constants.LOCHDR);
+ // 30 bytes and should start with "PK\003\004"
+ if (data.readUInt32LE(0) != Constants.LOCSIG) {
+ throw Utils.Errors.INVALID_LOC;
+ }
+ _dataHeader = {
+ // version needed to extract
+ version : data.readUInt16LE(Constants.LOCVER),
+ // general purpose bit flag
+ flags : data.readUInt16LE(Constants.LOCFLG),
+ // compression method
+ method : data.readUInt16LE(Constants.LOCHOW),
+ // modification time (2 bytes time, 2 bytes date)
+ time : data.readUInt32LE(Constants.LOCTIM),
+ // uncompressed file crc-32 value
+ crc : data.readUInt32LE(Constants.LOCCRC),
+ // compressed size
+ compressedSize : data.readUInt32LE(Constants.LOCSIZ),
+ // uncompressed size
+ size : data.readUInt32LE(Constants.LOCLEN),
+ // filename length
+ fnameLen : data.readUInt16LE(Constants.LOCNAM),
+ // extra field length
+ extraLen : data.readUInt16LE(Constants.LOCEXT)
+ }
+ },
+
+ loadFromBinary : function(/*Buffer*/data) {
+ // data should be 46 bytes and start with "PK 01 02"
+ if (data.length != Constants.CENHDR || data.readUInt32LE(0) != Constants.CENSIG) {
+ throw Utils.Errors.INVALID_CEN;
+ }
+ // version made by
+ _verMade = data.readUInt16LE(Constants.CENVEM);
+ // version needed to extract
+ _version = data.readUInt16LE(Constants.CENVER);
+ // encrypt, decrypt flags
+ _flags = data.readUInt16LE(Constants.CENFLG);
+ // compression method
+ _method = data.readUInt16LE(Constants.CENHOW);
+ // modification time (2 bytes time, 2 bytes date)
+ _time = data.readUInt32LE(Constants.CENTIM);
+ // uncompressed file crc-32 value
+ _crc = data.readUInt32LE(Constants.CENCRC);
+ // compressed size
+ _compressedSize = data.readUInt32LE(Constants.CENSIZ);
+ // uncompressed size
+ _size = data.readUInt32LE(Constants.CENLEN);
+ // filename length
+ _fnameLen = data.readUInt16LE(Constants.CENNAM);
+ // extra field length
+ _extraLen = data.readUInt16LE(Constants.CENEXT);
+ // file comment length
+ _comLen = data.readUInt16LE(Constants.CENCOM);
+ // volume number start
+ _diskStart = data.readUInt16LE(Constants.CENDSK);
+ // internal file attributes
+ _inattr = data.readUInt16LE(Constants.CENATT);
+ // external file attributes
+ _attr = data.readUInt32LE(Constants.CENATX);
+ // LOC header offset
+ _offset = data.readUInt32LE(Constants.CENOFF);
+ },
+
+ dataHeaderToBinary : function() {
+ // LOC header size (30 bytes)
+ var data = new Buffer(Constants.LOCHDR);
+ // "PK\003\004"
+ data.writeUInt32LE(Constants.LOCSIG, 0);
+ // version needed to extract
+ data.writeUInt16LE(_version, Constants.LOCVER);
+ // general purpose bit flag
+ data.writeUInt16LE(_flags, Constants.LOCFLG);
+ // compression method
+ data.writeUInt16LE(_method, Constants.LOCHOW);
+ // modification time (2 bytes time, 2 bytes date)
+ data.writeUInt32LE(_time, Constants.LOCTIM);
+ // uncompressed file crc-32 value
+ data.writeUInt32LE(_crc, Constants.LOCCRC);
+ // compressed size
+ data.writeUInt32LE(_compressedSize, Constants.LOCSIZ);
+ // uncompressed size
+ data.writeUInt32LE(_size, Constants.LOCLEN);
+ // filename length
+ data.writeUInt16LE(_fnameLen, Constants.LOCNAM);
+ // extra field length
+ data.writeUInt16LE(_extraLen, Constants.LOCEXT);
+ return data;
+ },
+
+ entryHeaderToBinary : function() {
+ // CEN header size (46 bytes)
+ var data = new Buffer(Constants.CENHDR + _fnameLen + _extraLen + _comLen);
+ // "PK\001\002"
+ data.writeUInt32LE(Constants.CENSIG, 0);
+ // version made by
+ data.writeUInt16LE(_verMade, Constants.CENVEM);
+ // version needed to extract
+ data.writeUInt16LE(_version, Constants.CENVER);
+ // encrypt, decrypt flags
+ data.writeUInt16LE(_flags, Constants.CENFLG);
+ // compression method
+ data.writeUInt16LE(_method, Constants.CENHOW);
+ // modification time (2 bytes time, 2 bytes date)
+ data.writeUInt32LE(_time, Constants.CENTIM);
+ // uncompressed file crc-32 value
+ data.writeInt32LE(_crc, Constants.CENCRC, true);
+ // compressed size
+ data.writeUInt32LE(_compressedSize, Constants.CENSIZ);
+ // uncompressed size
+ data.writeUInt32LE(_size, Constants.CENLEN);
+ // filename length
+ data.writeUInt16LE(_fnameLen, Constants.CENNAM);
+ // extra field length
+ data.writeUInt16LE(_extraLen, Constants.CENEXT);
+ // file comment length
+ data.writeUInt16LE(_comLen, Constants.CENCOM);
+ // volume number start
+ data.writeUInt16LE(_diskStart, Constants.CENDSK);
+ // internal file attributes
+ data.writeUInt16LE(_inattr, Constants.CENATT);
+ // external file attributes
+ data.writeUInt32LE(_attr, Constants.CENATX);
+ // LOC header offset
+ data.writeUInt32LE(_offset, Constants.CENOFF);
+ // fill all with
+ data.fill(0x00, Constants.CENHDR);
+ return data;
+ },
+
+ toString : function() {
+ return '{\n' +
+ '\t"made" : ' + _verMade + ",\n" +
+ '\t"version" : ' + _version + ",\n" +
+ '\t"flags" : ' + _flags + ",\n" +
+ '\t"method" : ' + Utils.methodToString(_method) + ",\n" +
+ '\t"time" : ' + _time + ",\n" +
+ '\t"crc" : 0x' + _crc.toString(16).toUpperCase() + ",\n" +
+ '\t"compressedSize" : ' + _compressedSize + " bytes,\n" +
+ '\t"size" : ' + _size + " bytes,\n" +
+ '\t"fileNameLength" : ' + _fnameLen + ",\n" +
+ '\t"extraLength" : ' + _extraLen + " bytes,\n" +
+ '\t"commentLength" : ' + _comLen + " bytes,\n" +
+ '\t"diskNumStart" : ' + _diskStart + ",\n" +
+ '\t"inAttr" : ' + _inattr + ",\n" +
+ '\t"attr" : ' + _attr + ",\n" +
+ '\t"offset" : ' + _offset + ",\n" +
+ '\t"entryHeaderSize" : ' + (Constants.CENHDR + _fnameLen + _extraLen + _comLen) + " bytes\n" +
+ '}';
+ }
+ }
+};
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