Initial

resources/app/node_modules/unzipper/lib/parseExtraField.js

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+const parseBuffer = require('./parseBuffer');
+
+module.exports = function(extraField, vars) {
+  let extra;
+  // Find the ZIP64 header, if present.
+  while(!extra && extraField && extraField.length) {
+    const candidateExtra = parseBuffer.parse(extraField, [
+      ['signature', 2],
+      ['partSize', 2],
+    ]);
+
+    if(candidateExtra.signature === 0x0001) {
+      // parse buffer based on data in ZIP64 central directory; order is important!
+      const fieldsToExpect = [];
+      if (vars.uncompressedSize === 0xffffffff) fieldsToExpect.push(['uncompressedSize', 8]);
+      if (vars.compressedSize === 0xffffffff) fieldsToExpect.push(['compressedSize', 8]);
+      if (vars.offsetToLocalFileHeader === 0xffffffff) fieldsToExpect.push(['offsetToLocalFileHeader', 8]);
+
+      // slice off the 4 bytes for signature and partSize
+      extra = parseBuffer.parse(extraField.slice(4), fieldsToExpect);
+    } else {
+      // Advance the buffer to the next part.
+      // The total size of this part is the 4 byte header + partsize.
+      extraField = extraField.slice(candidateExtra.partSize + 4);
+    }
+  }
+
+  extra = extra || {};
+
+  if (vars.compressedSize === 0xffffffff)
+    vars.compressedSize = extra.compressedSize;
+
+  if (vars.uncompressedSize === 0xffffffff)
+    vars.uncompressedSize= extra.uncompressedSize;
+
+  if (vars.offsetToLocalFileHeader === 0xffffffff)
+    vars.offsetToLocalFileHeader = extra.offsetToLocalFileHeader;
+
+  return extra;
+};