464 int sz = get16(extra, off + 2);
465 off += 4;
466 if (off + sz > len) // invalid data
467 break;
468 switch (tag) {
469 case EXTID_ZIP64:
470 if (doZIP64) {
471 // LOC extra zip64 entry MUST include BOTH original
472 // and compressed file size fields.
473 // If invalid zip64 extra fields, simply skip. Even
474 // it's rare, it's possible the entry size happens to
475 // be the magic value and it "accidently" has some
476 // bytes in extra match the id.
477 if (sz >= 16) {
478 size = get64(extra, off);
479 csize = get64(extra, off + 8);
480 }
481 }
482 break;
483 case EXTID_NTFS:
484 int pos = off + 4; // reserved 4 bytes
485 if (get16(extra, pos) != 0x0001 || get16(extra, pos + 2) != 24)
486 break;
487 mtime = winTimeToFileTime(get64(extra, pos + 4));
488 atime = winTimeToFileTime(get64(extra, pos + 12));
489 ctime = winTimeToFileTime(get64(extra, pos + 20));
490 break;
491 case EXTID_EXTT:
492 int flag = Byte.toUnsignedInt(extra[off]);
493 int sz0 = 1;
494 // The CEN-header extra field contains the modification
495 // time only, or no timestamp at all. 'sz' is used to
496 // flag its presence or absence. But if mtime is present
497 // in LOC it must be present in CEN as well.
498 if ((flag & 0x1) != 0 && (sz0 + 4) <= sz) {
499 mtime = unixTimeToFileTime(get32(extra, off + sz0));
500 sz0 += 4;
501 }
502 if ((flag & 0x2) != 0 && (sz0 + 4) <= sz) {
503 atime = unixTimeToFileTime(get32(extra, off + sz0));
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464 int sz = get16(extra, off + 2);
465 off += 4;
466 if (off + sz > len) // invalid data
467 break;
468 switch (tag) {
469 case EXTID_ZIP64:
470 if (doZIP64) {
471 // LOC extra zip64 entry MUST include BOTH original
472 // and compressed file size fields.
473 // If invalid zip64 extra fields, simply skip. Even
474 // it's rare, it's possible the entry size happens to
475 // be the magic value and it "accidently" has some
476 // bytes in extra match the id.
477 if (sz >= 16) {
478 size = get64(extra, off);
479 csize = get64(extra, off + 8);
480 }
481 }
482 break;
483 case EXTID_NTFS:
484 if (sz < 32) // reserved 4 bytes + tag 2 bytes + size 2 bytes
485 break; // m[a|c]time 24 bytes
486 int pos = off + 4; // reserved 4 bytes
487 if (get16(extra, pos) != 0x0001 || get16(extra, pos + 2) != 24)
488 break;
489 mtime = winTimeToFileTime(get64(extra, pos + 4));
490 atime = winTimeToFileTime(get64(extra, pos + 12));
491 ctime = winTimeToFileTime(get64(extra, pos + 20));
492 break;
493 case EXTID_EXTT:
494 int flag = Byte.toUnsignedInt(extra[off]);
495 int sz0 = 1;
496 // The CEN-header extra field contains the modification
497 // time only, or no timestamp at all. 'sz' is used to
498 // flag its presence or absence. But if mtime is present
499 // in LOC it must be present in CEN as well.
500 if ((flag & 0x1) != 0 && (sz0 + 4) <= sz) {
501 mtime = unixTimeToFileTime(get32(extra, off + sz0));
502 sz0 += 4;
503 }
504 if ((flag & 0x2) != 0 && (sz0 + 4) <= sz) {
505 atime = unixTimeToFileTime(get32(extra, off + sz0));
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