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Server IP : 172.67.142.142 / Your IP : 104.23.243.116 [ Reverse IP ]
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Directory : /var/app/comcon24/cms/node_modules/unzipper/lib/Open/

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Current File : /var/app/comcon24/cms/node_modules/unzipper/lib/Open/unzip.js

var Promise = require('bluebird');
var Decrypt = require('../Decrypt');
var PullStream = require('../PullStream');
var Stream = require('stream');
var binary = require('binary');
var zlib = require('zlib');
var parseExtraField = require('../parseExtraField');
var Buffer = require('../Buffer');
var parseDateTime = require('../parseDateTime');

// Backwards compatibility for node versions < 8
if (!Stream.Writable || !Stream.Writable.prototype.destroy)
  Stream = require('readable-stream');

module.exports = function unzip(source,offset,_password, directoryVars) {
  var file = PullStream(),
      entry = Stream.PassThrough();

  var req = source.stream(offset);
  req.pipe(file).on('error', function(e) {
    entry.emit('error', e);
  });

  entry.vars = file.pull(30)
    .then(function(data) {
      var vars = binary.parse(data)
        .word32lu('signature')
        .word16lu('versionsNeededToExtract')
        .word16lu('flags')
        .word16lu('compressionMethod')
        .word16lu('lastModifiedTime')
        .word16lu('lastModifiedDate')
        .word32lu('crc32')
        .word32lu('compressedSize')
        .word32lu('uncompressedSize')
        .word16lu('fileNameLength')
        .word16lu('extraFieldLength')
        .vars;

      vars.lastModifiedDateTime = parseDateTime(vars.lastModifiedDate, vars.lastModifiedTime);

      return file.pull(vars.fileNameLength)
        .then(function(fileName) {
          vars.fileName = fileName.toString('utf8');
          return file.pull(vars.extraFieldLength);
        })
        .then(function(extraField) {
          var checkEncryption;
          vars.extra = parseExtraField(extraField, vars);
          // Ignore logal file header vars if the directory vars are available
          if (directoryVars && directoryVars.compressedSize) vars = directoryVars;

          if (vars.flags & 0x01) checkEncryption = file.pull(12)
            .then(function(header) {
              if (!_password)
                throw new Error('MISSING_PASSWORD');

              var decrypt = Decrypt();

              String(_password).split('').forEach(function(d) {
                decrypt.update(d);
              });

              for (var i=0; i < header.length; i++)
                header[i] = decrypt.decryptByte(header[i]);

              vars.decrypt = decrypt;
              vars.compressedSize -= 12;

              var check = (vars.flags & 0x8) ? (vars.lastModifiedTime >> 8) & 0xff : (vars.crc32 >> 24) & 0xff;
              if (header[11] !== check)
                throw new Error('BAD_PASSWORD');

              return vars;
            });

          return Promise.resolve(checkEncryption)
            .then(function() {
              entry.emit('vars',vars);
              return vars;
            });
        });
    });

    entry.vars.then(function(vars) {
      var fileSizeKnown = !(vars.flags & 0x08) || vars.compressedSize > 0,
          eof;

      var inflater = vars.compressionMethod ? zlib.createInflateRaw() : Stream.PassThrough();

      if (fileSizeKnown) {
        entry.size = vars.uncompressedSize;
        eof = vars.compressedSize;
      } else {
        eof = Buffer.alloc(4);
        eof.writeUInt32LE(0x08074b50, 0);
      }

      var stream = file.stream(eof);

      if (vars.decrypt)
        stream = stream.pipe(vars.decrypt.stream());

      stream
        .pipe(inflater)
        .on('error',function(err) { entry.emit('error',err);})
        .pipe(entry)
        .on('finish', function() {
          if(req.destroy)
            req.destroy()
          else if (req.abort)
            req.abort();
          else if (req.close)
            req.close();
          else if (req.push)
            req.push();
          else
            console.log('warning - unable to close stream');
        });
    })
    .catch(function(e) {
      entry.emit('error',e);
    });

  return entry;
};

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AnonSec Team