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Java example source code file (PlatformPCSC.java)

This example Java source code file (PlatformPCSC.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

ioexception, lib1, pc\/sc, pcsc_framework, platformpcsc, privilegedaction, scard_absent, scard_negotiable, scard_protocol_raw, scard_protocol_t1, security, string, sunos, throwable, using

The PlatformPCSC.java Java example source code

/*
 * Copyright (c) 2005, 2012, 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 sun.security.smartcardio;

import java.io.File;
import java.io.IOException;

import java.security.AccessController;
import java.security.PrivilegedAction;

import sun.security.util.Debug;

/**
 * Platform specific code and functions for Unix / MUSCLE based PC/SC
 * implementations.
 *
 * @since   1.6
 * @author  Andreas Sterbenz
 */
class PlatformPCSC {

    static final Debug debug = Debug.getInstance("pcsc");

    static final Throwable initException;

    private final static String PROP_NAME = "sun.security.smartcardio.library";

    private final static String LIB1 = "/usr/$LIBISA/libpcsclite.so";
    private final static String LIB2 = "/usr/local/$LIBISA/libpcsclite.so";
    private final static String PCSC_FRAMEWORK = "/System/Library/Frameworks/PCSC.framework/Versions/Current/PCSC";

    PlatformPCSC() {
        // empty
    }

    static {
        initException = AccessController.doPrivileged(new PrivilegedAction<Throwable>() {
            public Throwable run() {
                try {
                    System.loadLibrary("j2pcsc");
                    String library = getLibraryName();
                    if (debug != null) {
                        debug.println("Using PC/SC library: " + library);
                    }
                    initialize(library);
                    return null;
                } catch (Throwable e) {
                    return e;
                }
            }
        });
    }

    // expand $LIBISA to the system specific directory name for libraries
    private static String expand(String lib) {
        int k = lib.indexOf("$LIBISA");
        if (k == -1) {
            return lib;
        }
        String s1 = lib.substring(0, k);
        String s2 = lib.substring(k + 7);
        String libDir;
        if ("64".equals(System.getProperty("sun.arch.data.model"))) {
            if ("SunOS".equals(System.getProperty("os.name"))) {
                libDir = "lib/64";
            } else {
                // assume Linux convention
                libDir = "lib64";
            }
        } else {
            // must be 32-bit
            libDir = "lib";
        }
        String s = s1 + libDir + s2;
        return s;
    }

    private static String getLibraryName() throws IOException {
        // if system property is set, use that library
        String lib = expand(System.getProperty(PROP_NAME, "").trim());
        if (lib.length() != 0) {
            return lib;
        }
        lib = expand(LIB1);
        if (new File(lib).isFile()) {
            // if LIB1 exists, use that
            return lib;
        }
        lib = expand(LIB2);
        if (new File(lib).isFile()) {
            // if LIB2 exists, use that
            return lib;
        }
        lib = PCSC_FRAMEWORK;
        if (new File(lib).isFile()) {
            // if PCSC.framework exists, use that
            return lib;
        }
        throw new IOException("No PC/SC library found on this system");
    }

    private static native void initialize(String libraryName);

    // PCSC constants defined differently under Windows and MUSCLE
    // MUSCLE version
    final static int SCARD_PROTOCOL_T0     =  0x0001;
    final static int SCARD_PROTOCOL_T1     =  0x0002;
    final static int SCARD_PROTOCOL_RAW    =  0x0004;

    final static int SCARD_UNKNOWN         =  0x0001;
    final static int SCARD_ABSENT          =  0x0002;
    final static int SCARD_PRESENT         =  0x0004;
    final static int SCARD_SWALLOWED       =  0x0008;
    final static int SCARD_POWERED         =  0x0010;
    final static int SCARD_NEGOTIABLE      =  0x0020;
    final static int SCARD_SPECIFIC        =  0x0040;

}

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