1/* 2 * Copyright (c) 2009, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package jdk.nio.zipfs; 27 28/** 29 * 30 * @author Xueming Shen 31 */ 32 33class ZipConstants { 34 /* 35 * Compression methods 36 */ 37 static final int METHOD_STORED = 0; 38 static final int METHOD_DEFLATED = 8; 39 static final int METHOD_DEFLATED64 = 9; 40 static final int METHOD_BZIP2 = 12; 41 static final int METHOD_LZMA = 14; 42 static final int METHOD_LZ77 = 19; 43 static final int METHOD_AES = 99; 44 45 /* 46 * General purpose big flag 47 */ 48 static final int FLAG_ENCRYPTED = 0x01; 49 static final int FLAG_DATADESCR = 0x08; // crc, size and csize in dd 50 static final int FLAG_EFS = 0x800; // If this bit is set the filename and 51 // comment fields for this file must be 52 // encoded using UTF-8. 53 /* 54 * Header signatures 55 */ 56 static long LOCSIG = 0x04034b50L; // "PK\003\004" 57 static long EXTSIG = 0x08074b50L; // "PK\007\008" 58 static long CENSIG = 0x02014b50L; // "PK\001\002" 59 static long ENDSIG = 0x06054b50L; // "PK\005\006" 60 61 /* 62 * Header sizes in bytes (including signatures) 63 */ 64 static final int LOCHDR = 30; // LOC header size 65 static final int EXTHDR = 16; // EXT header size 66 static final int CENHDR = 46; // CEN header size 67 static final int ENDHDR = 22; // END header size 68 69 /* 70 * Local file (LOC) header field offsets 71 */ 72 static final int LOCVER = 4; // version needed to extract 73 static final int LOCFLG = 6; // general purpose bit flag 74 static final int LOCHOW = 8; // compression method 75 static final int LOCTIM = 10; // modification time 76 static final int LOCCRC = 14; // uncompressed file crc-32 value 77 static final int LOCSIZ = 18; // compressed size 78 static final int LOCLEN = 22; // uncompressed size 79 static final int LOCNAM = 26; // filename length 80 static final int LOCEXT = 28; // extra field length 81 82 /* 83 * Extra local (EXT) header field offsets 84 */ 85 static final int EXTCRC = 4; // uncompressed file crc-32 value 86 static final int EXTSIZ = 8; // compressed size 87 static final int EXTLEN = 12; // uncompressed size 88 89 /* 90 * Central directory (CEN) header field offsets 91 */ 92 static final int CENVEM = 4; // version made by 93 static final int CENVER = 6; // version needed to extract 94 static final int CENFLG = 8; // encrypt, decrypt flags 95 static final int CENHOW = 10; // compression method 96 static final int CENTIM = 12; // modification time 97 static final int CENCRC = 16; // uncompressed file crc-32 value 98 static final int CENSIZ = 20; // compressed size 99 static final int CENLEN = 24; // uncompressed size 100 static final int CENNAM = 28; // filename length 101 static final int CENEXT = 30; // extra field length 102 static final int CENCOM = 32; // comment length 103 static final int CENDSK = 34; // disk number start 104 static final int CENATT = 36; // internal file attributes 105 static final int CENATX = 38; // external file attributes 106 static final int CENOFF = 42; // LOC header offset 107 108 /* 109 * End of central directory (END) header field offsets 110 */ 111 static final int ENDSUB = 8; // number of entries on this disk 112 static final int ENDTOT = 10; // total number of entries 113 static final int ENDSIZ = 12; // central directory size in bytes 114 static final int ENDOFF = 16; // offset of first CEN header 115 static final int ENDCOM = 20; // zip file comment length 116 117 /* 118 * ZIP64 constants 119 */ 120 static final long ZIP64_ENDSIG = 0x06064b50L; // "PK\006\006" 121 static final long ZIP64_LOCSIG = 0x07064b50L; // "PK\006\007" 122 static final int ZIP64_ENDHDR = 56; // ZIP64 end header size 123 static final int ZIP64_LOCHDR = 20; // ZIP64 end loc header size 124 static final int ZIP64_EXTHDR = 24; // EXT header size 125 static final int ZIP64_EXTID = 0x0001; // Extra field Zip64 header ID 126 127 static final int ZIP64_MINVAL32 = 0xFFFF; 128 static final long ZIP64_MINVAL = 0xFFFFFFFFL; 129 130 /* 131 * Zip64 End of central directory (END) header field offsets 132 */ 133 static final int ZIP64_ENDLEN = 4; // size of zip64 end of central dir 134 static final int ZIP64_ENDVEM = 12; // version made by 135 static final int ZIP64_ENDVER = 14; // version needed to extract 136 static final int ZIP64_ENDNMD = 16; // number of this disk 137 static final int ZIP64_ENDDSK = 20; // disk number of start 138 static final int ZIP64_ENDTOD = 24; // total number of entries on this disk 139 static final int ZIP64_ENDTOT = 32; // total number of entries 140 static final int ZIP64_ENDSIZ = 40; // central directory size in bytes 141 static final int ZIP64_ENDOFF = 48; // offset of first CEN header 142 static final int ZIP64_ENDEXT = 56; // zip64 extensible data sector 143 144 /* 145 * Zip64 End of central directory locator field offsets 146 */ 147 static final int ZIP64_LOCDSK = 4; // disk number start 148 static final int ZIP64_LOCOFF = 8; // offset of zip64 end 149 static final int ZIP64_LOCTOT = 16; // total number of disks 150 151 /* 152 * Zip64 Extra local (EXT) header field offsets 153 */ 154 static final int ZIP64_EXTCRC = 4; // uncompressed file crc-32 value 155 static final int ZIP64_EXTSIZ = 8; // compressed size, 8-byte 156 static final int ZIP64_EXTLEN = 16; // uncompressed size, 8-byte 157 158 /* 159 * Extra field header ID 160 */ 161 static final int EXTID_ZIP64 = 0x0001; // ZIP64 162 static final int EXTID_NTFS = 0x000a; // NTFS 163 static final int EXTID_UNIX = 0x000d; // UNIX 164 static final int EXTID_EFS = 0x0017; // Strong Encryption 165 static final int EXTID_EXTT = 0x5455; // Info-ZIP Extended Timestamp 166 167 /* 168 * fields access methods 169 */ 170 /////////////////////////////////////////////////////// 171 static final int CH(byte[] b, int n) { 172 return Byte.toUnsignedInt(b[n]); 173 } 174 175 static final int SH(byte[] b, int n) { 176 return Byte.toUnsignedInt(b[n]) | (Byte.toUnsignedInt(b[n + 1]) << 8); 177 } 178 179 static final long LG(byte[] b, int n) { 180 return ((SH(b, n)) | (SH(b, n + 2) << 16)) & 0xffffffffL; 181 } 182 183 static final long LL(byte[] b, int n) { 184 return (LG(b, n)) | (LG(b, n + 4) << 32); 185 } 186 187 static long getSig(byte[] b, int n) { return LG(b, n); } 188 189 private static boolean pkSigAt(byte[] b, int n, int b1, int b2) { 190 return b[n] == 'P' & b[n + 1] == 'K' & b[n + 2] == b1 & b[n + 3] == b2; 191 } 192 193 static boolean cenSigAt(byte[] b, int n) { return pkSigAt(b, n, 1, 2); } 194 static boolean locSigAt(byte[] b, int n) { return pkSigAt(b, n, 3, 4); } 195 static boolean endSigAt(byte[] b, int n) { return pkSigAt(b, n, 5, 6); } 196 static boolean extSigAt(byte[] b, int n) { return pkSigAt(b, n, 7, 8); } 197 static boolean end64SigAt(byte[] b, int n) { return pkSigAt(b, n, 6, 6); } 198 static boolean locator64SigAt(byte[] b, int n) { return pkSigAt(b, n, 6, 7); } 199 200 // local file (LOC) header fields 201 static final long LOCSIG(byte[] b) { return LG(b, 0); } // signature 202 static final int LOCVER(byte[] b) { return SH(b, 4); } // version needed to extract 203 static final int LOCFLG(byte[] b) { return SH(b, 6); } // general purpose bit flags 204 static final int LOCHOW(byte[] b) { return SH(b, 8); } // compression method 205 static final long LOCTIM(byte[] b) { return LG(b, 10);} // modification time 206 static final long LOCCRC(byte[] b) { return LG(b, 14);} // crc of uncompressed data 207 static final long LOCSIZ(byte[] b) { return LG(b, 18);} // compressed data size 208 static final long LOCLEN(byte[] b) { return LG(b, 22);} // uncompressed data size 209 static final int LOCNAM(byte[] b) { return SH(b, 26);} // filename length 210 static final int LOCEXT(byte[] b) { return SH(b, 28);} // extra field length 211 212 // extra local (EXT) header fields 213 static final long EXTCRC(byte[] b) { return LG(b, 4);} // crc of uncompressed data 214 static final long EXTSIZ(byte[] b) { return LG(b, 8);} // compressed size 215 static final long EXTLEN(byte[] b) { return LG(b, 12);} // uncompressed size 216 217 // end of central directory header (END) fields 218 static final int ENDSUB(byte[] b) { return SH(b, 8); } // number of entries on this disk 219 static final int ENDTOT(byte[] b) { return SH(b, 10);} // total number of entries 220 static final long ENDSIZ(byte[] b) { return LG(b, 12);} // central directory size 221 static final long ENDOFF(byte[] b) { return LG(b, 16);} // central directory offset 222 static final int ENDCOM(byte[] b) { return SH(b, 20);} // size of zip file comment 223 static final int ENDCOM(byte[] b, int off) { return SH(b, off + 20);} 224 225 // zip64 end of central directory recoder fields 226 static final long ZIP64_ENDTOD(byte[] b) { return LL(b, 24);} // total number of entries on disk 227 static final long ZIP64_ENDTOT(byte[] b) { return LL(b, 32);} // total number of entries 228 static final long ZIP64_ENDSIZ(byte[] b) { return LL(b, 40);} // central directory size 229 static final long ZIP64_ENDOFF(byte[] b) { return LL(b, 48);} // central directory offset 230 static final long ZIP64_LOCOFF(byte[] b) { return LL(b, 8);} // zip64 end offset 231 232 // central directory header (CEN) fields 233 static final long CENSIG(byte[] b, int pos) { return LG(b, pos + 0); } 234 static final int CENVEM(byte[] b, int pos) { return SH(b, pos + 4); } 235 static final int CENVER(byte[] b, int pos) { return SH(b, pos + 6); } 236 static final int CENFLG(byte[] b, int pos) { return SH(b, pos + 8); } 237 static final int CENHOW(byte[] b, int pos) { return SH(b, pos + 10);} 238 static final long CENTIM(byte[] b, int pos) { return LG(b, pos + 12);} 239 static final long CENCRC(byte[] b, int pos) { return LG(b, pos + 16);} 240 static final long CENSIZ(byte[] b, int pos) { return LG(b, pos + 20);} 241 static final long CENLEN(byte[] b, int pos) { return LG(b, pos + 24);} 242 static final int CENNAM(byte[] b, int pos) { return SH(b, pos + 28);} 243 static final int CENEXT(byte[] b, int pos) { return SH(b, pos + 30);} 244 static final int CENCOM(byte[] b, int pos) { return SH(b, pos + 32);} 245 static final int CENDSK(byte[] b, int pos) { return SH(b, pos + 34);} 246 static final int CENATT(byte[] b, int pos) { return SH(b, pos + 36);} 247 static final long CENATX(byte[] b, int pos) { return LG(b, pos + 38);} 248 static final long CENOFF(byte[] b, int pos) { return LG(b, pos + 42);} 249 250 /* The END header is followed by a variable length comment of size < 64k. */ 251 static final long END_MAXLEN = 0xFFFF + ENDHDR; 252 static final int READBLOCKSZ = 128; 253} 254