Source Code Cross Referenced for PKCS15File.java in  » 6.0-JDK-Modules » j2me » com » sun » satsa » util » pkcs15 » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » com.sun.satsa.util.pkcs15 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *   
003:         *
004:         * Copyright  1990-2007 Sun Microsystems, Inc. All Rights Reserved.
005:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
006:         * 
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU General Public License version
009:         * 2 only, as published by the Free Software Foundation.
010:         * 
011:         * This program is distributed in the hope that it will be useful, but
012:         * WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014:         * General Public License version 2 for more details (a copy is
015:         * included at /legal/license.txt).
016:         * 
017:         * You should have received a copy of the GNU General Public License
018:         * version 2 along with this work; if not, write to the Free Software
019:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA
021:         * 
022:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
023:         * Clara, CA 95054 or visit www.sun.com if you need additional
024:         * information or have any questions.
025:         */
026:        package com.sun.satsa.util.pkcs15;
027:
028:        import com.sun.satsa.util.*;
029:        import java.util.Vector;
030:        import java.io.IOException;
031:
032:        /**
033:         * This class represents PKCS15 file abstraction
034:         */
035:        public class PKCS15File {
036:            /** ODF path. */
037:            protected static final short ODFPath = 0x5031;
038:            /** EF(TokenInfo) path. */
039:            protected static final short TokenInfoPath = 0x5032;
040:            /** EF(UnusedSpace) path. */
041:            protected static final short UnusedSpace = 0x5033;
042:
043:            /** This vector contains objects loaded from directory file. */
044:            protected Vector loaderObjects;
045:            /** This vector contains locations of loaded objects. */
046:            protected Vector loaderLocations;
047:            /**
048:             * This vector contains locations of free space in directory
049:             * files. */
050:            protected Vector loaderFreeBlocks;
051:            /** Location */
052:            protected Location location;
053:            /** File system object. */
054:            protected FileSystemAbstract files;
055:
056:            /**
057:             * Create the object for the pointed file system and location
058:             * @param location Location required location
059:             * @param files FileSystemAbstract required file system
060:             */
061:            protected PKCS15File(Location location, FileSystemAbstract files) {
062:                this .location = location;
063:                this .files = files;
064:            }
065:
066:            /**
067:             * Create the object for the pointed file system
068:             * @param files FileSystemAbstract required file system
069:             */
070:            protected PKCS15File(FileSystemAbstract files) {
071:                this .files = files;
072:            }
073:
074:            /**
075:             * Initialises object loader.
076:             * @param objects vector for loaded objects or null
077:             * @param locations vector for object locations or null
078:             * @param freeBlocks vector for unused block locations or null
079:             */
080:            protected void resetLoader(Vector objects, Vector locations,
081:                    Vector freeBlocks) {
082:                loaderObjects = objects;
083:                loaderLocations = locations;
084:                loaderFreeBlocks = freeBlocks;
085:            }
086:
087:            /**
088:             * Parses directory file. Places results into vectors specified
089:             * <code>resetLoader</code> method.
090:             * @param path path to directory file
091:             * @throws TLVException if parsing error occurs
092:             * @throws IOException if I/O error occurs
093:             */
094:            protected void parseDF(short[] path) throws TLVException,
095:                    IOException {
096:                if (path.length > 1) {
097:                    files.select(path);
098:                } else {
099:                    files.select(path[0]);
100:                }
101:                doParseDF(files.readFile(), path, loaderObjects,
102:                        loaderLocations, loaderFreeBlocks);
103:            }
104:
105:            /**
106:             * Parses EF(DF).
107:             * @param data data to be parsed
108:             * @param path file path
109:             * @param objects method places objects from file into this vector.
110:             *        Can be null. Contains values of TLV type
111:             * @param locations method places location of objects into this
112:             *        vector. Can be null. Contains values of type Location.
113:             * @param freeBlocks method places locations of free memory in
114:             *        EF(DF) into this vector. Can be null. Contains values of
115:             *        type Location.
116:             * @throws TLVException if parsing error occurs
117:             */
118:            protected static void doParseDF(byte[] data, short[] path,
119:                    Vector objects, Vector locations, Vector freeBlocks)
120:                    throws TLVException {
121:                int start = 0;
122:                int current = 0;
123:                while (current < data.length) {
124:                    // free space - skip
125:                    if (data[current] == (byte) 0xff) {
126:                        current++;
127:                        continue;
128:                    }
129:                    // TLV object
130:                    TLV t = new TLV(data, current);
131:                    // empty one - skip
132:                    if (t.type == 0) {
133:                        current = t.valueOffset + t.length;
134:                        continue;
135:                    }
136:                    // real object
137:                    if (objects != null) {
138:                        objects.addElement(t);
139:                    }
140:                    if (locations != null) {
141:                        locations.addElement(new Location(path, current,
142:                                t.valueOffset + t.length - current));
143:                    }
144:                    if (freeBlocks != null && start < current) {
145:                        freeBlocks.addElement(new Location(path, start, current
146:                                - start));
147:                    }
148:                    current = t.valueOffset + t.length;
149:                    start = current;
150:                }
151:                if (start < current && freeBlocks != null) {
152:                    freeBlocks.addElement(new Location(path, start, current
153:                            - start));
154:                }
155:            }
156:
157:        }
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