des.java

jpeg2000编解码

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*/
    };
    
    private static void self_test()
    throws Exception {
        Cipher cryptor = Cipher.getInstance("DES", "Cryptix");
        RawSecretKey userKey;
        byte[] tmp, pt, ct;

        for (int i = 0; i < tests.length; i++) {
            userKey = new RawSecretKey("DES", Hex.fromString(tests[i][0]));
            pt = Hex.fromString(tests[i][1]);
            ct = Hex.fromString(tests[i][2]);

            cryptor.initEncrypt(userKey);
            tmp = cryptor.crypt(pt);
            if (!ArrayUtil.areEqual(ct, tmp))
                   throw new CryptixException("encrypt #"+ i +" failed");

            cryptor.initDecrypt(userKey);
            tmp = cryptor.crypt(ct);
               if (!ArrayUtil.areEqual(pt, tmp))
                throw new CryptixException("decrypt #"+ i +" failed");
        }
if (DEBUG && debuglevel > 0) debug("Self-test OK");
    }

/*
    private static void
    time_test(PrintWriter out, String keyStr, String plainStr, String cipherStr)
    throws InvalidKeyException {

        byte key[] = Hex.fromString(keyStr);
        byte plain[] = Hex.fromString(plainStr);
        byte cipher[] = Hex.fromString(cipherStr);
        DES des;
        out.println();
        out.println();
        out.println("Starting time tests ...");
        out.println();
        out.println("Calculating the approximate speed ...");
        out.println();

        int count=10;
        long begin;
        double d;
        do {
            des = new DES(key);
            long i;
            count *= 2;
            begin = System.currentTimeMillis();
            for (i=count; i!=0; i--)
                des.des(plain, 0, cipher, 0, true);
            d = System.currentTimeMillis() - begin;
        } while (d < 3000);

        count *= 2;
        out.println("Doing "+count+" encryptions");

        out.println("Calculating the real speed ...");
        out.println();

        begin = System.currentTimeMillis();
        for (int i = count; i != 0; i--) {
            des = new DES(key);
            des.des(plain, 0, cipher, 0, true);
        }
        d = (System.currentTimeMillis() - begin)/1000;
        out.println(count + " encryptions in " + d + " seconds");

        d = (double) count / d;
        out.println("DES encryptions per sec = " + d);
    }
*/
}

/* The DES cipher (in ECB mode).
 *
 * Parts of this code Copyright (C) 1996 Geoffrey Keating. All rights reserved.
 *
 * Its use is FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
 * as long as the following conditions are adhered to.
 * 
 * Copyright remains Geoffrey Keating's, and as such any Copyright notices in
 * the code are not to be removed.  If this code is used in a product,
 * Geoffrey Keating should be given attribution as the author of the parts used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by Geoffrey Keating
 *    ([e-mail])
 * 
 * THIS SOFTWARE IS PROVIDED BY GEOFFREY KEATING ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 */
/* Parts of this code (in particular, the string representing SP_TRANS)
 * are Copyright (C) 1995 Eric Young ([e-mail]). All rights reserved.
 *
 * Its use is FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
 * as long as the following conditions are adhered to.
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.  If this code is used in a product,
 * Eric Young should be given attribution as the author of the parts used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by Eric Young ([e-mail])
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */