| /* |
| * Copyright (c) 2009, 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.nio.zipfs; |
| |
| /** |
| * |
| * @author Xueming Shen |
| */ |
| |
| class ZipConstants { |
| /* |
| * Compression methods |
| */ |
| static final int METHOD_STORED = 0; |
| static final int METHOD_DEFLATED = 8; |
| static final int METHOD_DEFLATED64 = 9; |
| static final int METHOD_BZIP2 = 12; |
| static final int METHOD_LZMA = 14; |
| static final int METHOD_LZ77 = 19; |
| static final int METHOD_AES = 99; |
| |
| /* |
| * General purpose big flag |
| */ |
| static final int FLAG_ENCRYPTED = 0x01; |
| static final int FLAG_DATADESCR = 0x08; // crc, size and csize in dd |
| static final int FLAG_EFS = 0x800; // If this bit is set the filename and |
| // comment fields for this file must be |
| // encoded using UTF-8. |
| /* |
| * Header signatures |
| */ |
| static long LOCSIG = 0x04034b50L; // "PK\003\004" |
| static long EXTSIG = 0x08074b50L; // "PK\007\008" |
| static long CENSIG = 0x02014b50L; // "PK\001\002" |
| static long ENDSIG = 0x06054b50L; // "PK\005\006" |
| |
| /* |
| * Header sizes in bytes (including signatures) |
| */ |
| static final int LOCHDR = 30; // LOC header size |
| static final int EXTHDR = 16; // EXT header size |
| static final int CENHDR = 46; // CEN header size |
| static final int ENDHDR = 22; // END header size |
| |
| /* |
| * Local file (LOC) header field offsets |
| */ |
| static final int LOCVER = 4; // version needed to extract |
| static final int LOCFLG = 6; // general purpose bit flag |
| static final int LOCHOW = 8; // compression method |
| static final int LOCTIM = 10; // modification time |
| static final int LOCCRC = 14; // uncompressed file crc-32 value |
| static final int LOCSIZ = 18; // compressed size |
| static final int LOCLEN = 22; // uncompressed size |
| static final int LOCNAM = 26; // filename length |
| static final int LOCEXT = 28; // extra field length |
| |
| /* |
| * Extra local (EXT) header field offsets |
| */ |
| static final int EXTCRC = 4; // uncompressed file crc-32 value |
| static final int EXTSIZ = 8; // compressed size |
| static final int EXTLEN = 12; // uncompressed size |
| |
| /* |
| * Central directory (CEN) header field offsets |
| */ |
| static final int CENVEM = 4; // version made by |
| static final int CENVER = 6; // version needed to extract |
| static final int CENFLG = 8; // encrypt, decrypt flags |
| static final int CENHOW = 10; // compression method |
| static final int CENTIM = 12; // modification time |
| static final int CENCRC = 16; // uncompressed file crc-32 value |
| static final int CENSIZ = 20; // compressed size |
| static final int CENLEN = 24; // uncompressed size |
| static final int CENNAM = 28; // filename length |
| static final int CENEXT = 30; // extra field length |
| static final int CENCOM = 32; // comment length |
| static final int CENDSK = 34; // disk number start |
| static final int CENATT = 36; // internal file attributes |
| static final int CENATX = 38; // external file attributes |
| static final int CENOFF = 42; // LOC header offset |
| |
| /* |
| * End of central directory (END) header field offsets |
| */ |
| static final int ENDSUB = 8; // number of entries on this disk |
| static final int ENDTOT = 10; // total number of entries |
| static final int ENDSIZ = 12; // central directory size in bytes |
| static final int ENDOFF = 16; // offset of first CEN header |
| static final int ENDCOM = 20; // zip file comment length |
| |
| /* |
| * ZIP64 constants |
| */ |
| static final long ZIP64_ENDSIG = 0x06064b50L; // "PK\006\006" |
| static final long ZIP64_LOCSIG = 0x07064b50L; // "PK\006\007" |
| static final int ZIP64_ENDHDR = 56; // ZIP64 end header size |
| static final int ZIP64_LOCHDR = 20; // ZIP64 end loc header size |
| static final int ZIP64_EXTHDR = 24; // EXT header size |
| static final int ZIP64_EXTID = 0x0001; // Extra field Zip64 header ID |
| |
| static final int ZIP64_MINVAL32 = 0xFFFF; |
| static final long ZIP64_MINVAL = 0xFFFFFFFFL; |
| |
| /* |
| * Zip64 End of central directory (END) header field offsets |
| */ |
| static final int ZIP64_ENDLEN = 4; // size of zip64 end of central dir |
| static final int ZIP64_ENDVEM = 12; // version made by |
| static final int ZIP64_ENDVER = 14; // version needed to extract |
| static final int ZIP64_ENDNMD = 16; // number of this disk |
| static final int ZIP64_ENDDSK = 20; // disk number of start |
| static final int ZIP64_ENDTOD = 24; // total number of entries on this disk |
| static final int ZIP64_ENDTOT = 32; // total number of entries |
| static final int ZIP64_ENDSIZ = 40; // central directory size in bytes |
| static final int ZIP64_ENDOFF = 48; // offset of first CEN header |
| static final int ZIP64_ENDEXT = 56; // zip64 extensible data sector |
| |
| /* |
| * Zip64 End of central directory locator field offsets |
| */ |
| static final int ZIP64_LOCDSK = 4; // disk number start |
| static final int ZIP64_LOCOFF = 8; // offset of zip64 end |
| static final int ZIP64_LOCTOT = 16; // total number of disks |
| |
| /* |
| * Zip64 Extra local (EXT) header field offsets |
| */ |
| static final int ZIP64_EXTCRC = 4; // uncompressed file crc-32 value |
| static final int ZIP64_EXTSIZ = 8; // compressed size, 8-byte |
| static final int ZIP64_EXTLEN = 16; // uncompressed size, 8-byte |
| |
| /* |
| * Extra field header ID |
| */ |
| static final int EXTID_ZIP64 = 0x0001; // ZIP64 |
| static final int EXTID_NTFS = 0x000a; // NTFS |
| static final int EXTID_UNIX = 0x000d; // UNIX |
| static final int EXTID_EFS = 0x0017; // Strong Encryption |
| static final int EXTID_EXTT = 0x5455; // Info-ZIP Extended Timestamp |
| |
| /* |
| * fields access methods |
| */ |
| /////////////////////////////////////////////////////// |
| static final int CH(byte[] b, int n) { |
| return Byte.toUnsignedInt(b[n]); |
| } |
| |
| static final int SH(byte[] b, int n) { |
| return Byte.toUnsignedInt(b[n]) | (Byte.toUnsignedInt(b[n + 1]) << 8); |
| } |
| |
| static final long LG(byte[] b, int n) { |
| return ((SH(b, n)) | (SH(b, n + 2) << 16)) & 0xffffffffL; |
| } |
| |
| static final long LL(byte[] b, int n) { |
| return (LG(b, n)) | (LG(b, n + 4) << 32); |
| } |
| |
| static long getSig(byte[] b, int n) { return LG(b, n); } |
| |
| private static boolean pkSigAt(byte[] b, int n, int b1, int b2) { |
| return b[n] == 'P' & b[n + 1] == 'K' & b[n + 2] == b1 & b[n + 3] == b2; |
| } |
| |
| static boolean cenSigAt(byte[] b, int n) { return pkSigAt(b, n, 1, 2); } |
| static boolean locSigAt(byte[] b, int n) { return pkSigAt(b, n, 3, 4); } |
| static boolean endSigAt(byte[] b, int n) { return pkSigAt(b, n, 5, 6); } |
| static boolean extSigAt(byte[] b, int n) { return pkSigAt(b, n, 7, 8); } |
| static boolean end64SigAt(byte[] b, int n) { return pkSigAt(b, n, 6, 6); } |
| static boolean locator64SigAt(byte[] b, int n) { return pkSigAt(b, n, 6, 7); } |
| |
| // local file (LOC) header fields |
| static final long LOCSIG(byte[] b) { return LG(b, 0); } // signature |
| static final int LOCVER(byte[] b) { return SH(b, 4); } // version needed to extract |
| static final int LOCFLG(byte[] b) { return SH(b, 6); } // general purpose bit flags |
| static final int LOCHOW(byte[] b) { return SH(b, 8); } // compression method |
| static final long LOCTIM(byte[] b) { return LG(b, 10);} // modification time |
| static final long LOCCRC(byte[] b) { return LG(b, 14);} // crc of uncompressed data |
| static final long LOCSIZ(byte[] b) { return LG(b, 18);} // compressed data size |
| static final long LOCLEN(byte[] b) { return LG(b, 22);} // uncompressed data size |
| static final int LOCNAM(byte[] b) { return SH(b, 26);} // filename length |
| static final int LOCEXT(byte[] b) { return SH(b, 28);} // extra field length |
| |
| // extra local (EXT) header fields |
| static final long EXTCRC(byte[] b) { return LG(b, 4);} // crc of uncompressed data |
| static final long EXTSIZ(byte[] b) { return LG(b, 8);} // compressed size |
| static final long EXTLEN(byte[] b) { return LG(b, 12);} // uncompressed size |
| |
| // end of central directory header (END) fields |
| static final int ENDSUB(byte[] b) { return SH(b, 8); } // number of entries on this disk |
| static final int ENDTOT(byte[] b) { return SH(b, 10);} // total number of entries |
| static final long ENDSIZ(byte[] b) { return LG(b, 12);} // central directory size |
| static final long ENDOFF(byte[] b) { return LG(b, 16);} // central directory offset |
| static final int ENDCOM(byte[] b) { return SH(b, 20);} // size of zip file comment |
| static final int ENDCOM(byte[] b, int off) { return SH(b, off + 20);} |
| |
| // zip64 end of central directory recoder fields |
| static final long ZIP64_ENDTOD(byte[] b) { return LL(b, 24);} // total number of entries on disk |
| static final long ZIP64_ENDTOT(byte[] b) { return LL(b, 32);} // total number of entries |
| static final long ZIP64_ENDSIZ(byte[] b) { return LL(b, 40);} // central directory size |
| static final long ZIP64_ENDOFF(byte[] b) { return LL(b, 48);} // central directory offset |
| static final long ZIP64_LOCOFF(byte[] b) { return LL(b, 8);} // zip64 end offset |
| |
| // central directory header (CEN) fields |
| static final long CENSIG(byte[] b, int pos) { return LG(b, pos + 0); } |
| static final int CENVEM(byte[] b, int pos) { return SH(b, pos + 4); } |
| static final int CENVER(byte[] b, int pos) { return SH(b, pos + 6); } |
| static final int CENFLG(byte[] b, int pos) { return SH(b, pos + 8); } |
| static final int CENHOW(byte[] b, int pos) { return SH(b, pos + 10);} |
| static final long CENTIM(byte[] b, int pos) { return LG(b, pos + 12);} |
| static final long CENCRC(byte[] b, int pos) { return LG(b, pos + 16);} |
| static final long CENSIZ(byte[] b, int pos) { return LG(b, pos + 20);} |
| static final long CENLEN(byte[] b, int pos) { return LG(b, pos + 24);} |
| static final int CENNAM(byte[] b, int pos) { return SH(b, pos + 28);} |
| static final int CENEXT(byte[] b, int pos) { return SH(b, pos + 30);} |
| static final int CENCOM(byte[] b, int pos) { return SH(b, pos + 32);} |
| static final int CENDSK(byte[] b, int pos) { return SH(b, pos + 34);} |
| static final int CENATT(byte[] b, int pos) { return SH(b, pos + 36);} |
| static final long CENATX(byte[] b, int pos) { return LG(b, pos + 38);} |
| static final long CENOFF(byte[] b, int pos) { return LG(b, pos + 42);} |
| |
| /* The END header is followed by a variable length comment of size < 64k. */ |
| static final long END_MAXLEN = 0xFFFF + ENDHDR; |
| static final int READBLOCKSZ = 128; |
| } |