signatureverifier.java

cisco－2950交换机的应用程序的源代码

// Decompiled by Jad v1.5.7g. Copyright 2000 Pavel Kouznetsov.
// Jad home page: http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi 
// Source File Name:   SignatureVerifier.java

package cisco.dsbu.cms.boot.internal;

import java.io.*;
import java.security.*;

class SignatureVerifier
{

    private static PublicKey publicKey;
    private MessageDigest msgDigest;
    private int archiveStatus;
    private byte digestData[];
    private int digestOffset;
    private static final int DIGEST_LENGTH = 20;
    private static final byte PUBLIC_KEY[] = {
        -84, -19, 0, 5, 115, 114, 0, 34, 115, 117, 
        110, 46, 115, 101, 99, 117, 114, 105, 116, 121, 
        46, 112, 114, 111, 118, 105, 100, 101, 114, 46, 
        68, 83, 65, 80, 117, 98, 108, 105, 99, 75, 
        101, 121, -42, 114, 125, 13, 4, 25, -21, 123, 
        2, 0, 1, 76, 0, 1, 121, 116, 0, 22, 
        76, 106, 97, 118, 97, 47, 109, 97, 116, 104, 
        47, 66, 105, 103, 73, 110, 116, 101, 103, 101, 
        114, 59, 120, 114, 0, 25, 115, 117, 110, 46, 
        115, 101, 99, 117, 114, 105, 116, 121, 46, 120, 
        53, 48, 57, 46, 88, 53, 48, 57, 75, 101, 
        121, -75, -96, 29, -66, 100, -102, 114, -90, 3, 
        0, 3, 76, 0, 5, 97, 108, 103, 105, 100, 
        116, 0, 31, 76, 115, 117, 110, 47, 115, 101, 
        99, 117, 114, 105, 116, 121, 47, 120, 53, 48, 
        57, 47, 65, 108, 103, 111, 114, 105, 116, 104, 
        109, 73, 100, 59, 91, 0, 10, 101, 110, 99, 
        111, 100, 101, 100, 75, 101, 121, 116, 0, 2, 
        91, 66, 91, 0, 3, 107, 101, 121, 113, 0, 
        126, 0, 4, 120, 112, 122, 0, 0, 1, -69, 
        48, -126, 1, -73, 48, -126, 1, 44, 6, 7, 
        42, -122, 72, -50, 56, 4, 1, 48, -126, 1, 
        31, 2, -127, -127, 0, -3, 127, 83, -127, 29, 
        117, 18, 41, 82, -33, 74, -100, 46, -20, -28, 
        -25, -10, 17, -73, 82, 60, -17, 68, 0, -61, 
        30, 63, -128, -74, 81, 38, 105, 69, 93, 64, 
        34, 81, -5, 89, 61, -115, 88, -6, -65, -59, 
        -11, -70, 48, -10, -53, -101, 85, 108, -41, -127, 
        59, -128, 29, 52, 111, -14, 102, 96, -73, 107, 
        -103, 80, -91, -92, -97, -97, -24, 4, 123, 16, 
        34, -62, 79, -69, -87, -41, -2, -73, -58, 27, 
        -8, 59, 87, -25, -58, -88, -90, 21, 15, 4, 
        -5, -125, -10, -45, -59, 30, -61, 2, 53, 84, 
        19, 90, 22, -111, 50, -10, 117, -13, -82, 43, 
        97, -41, 42, -17, -14, 34, 3, 25, -99, -47, 
        72, 1, -57, 2, 21, 0, -105, 96, 80, -113, 
        21, 35, 11, -52, -78, -110, -71, -126, -94, -21, 
        -124, 11, -16, 88, 28, -11, 2, -127, -127, 0, 
        -9, -31, -96, -123, -42, -101, 61, -34, -53, -68, 
        -85, 92, 54, -72, 87, -71, 121, -108, -81, -69, 
        -6, 58, -22, -126, -7, 87, 76, 11, 61, 7, 
        -126, 103, 81, 89, 87, -114, -70, -44, 89, 79, 
        -26, 113, 7, 16, -127, -128, -76, 73, 22, 113, 
        35, -24, 76, 40, 22, 19, -73, -49, 9, 50, 
        -116, -56, -90, -31, 60, 22, 122, -117, 84, 124, 
        -115, 40, -32, -93, -82, 30, 43, -77, -90, 117, 
        -111, 110, -93, 127, 11, -6, 33, 53, 98, -15, 
        -5, 98, 122, 1, 36, 59, -52, -92, -15, -66, 
        -88, 81, -112, -119, -88, -125, -33, -31, 90, -27, 
        -97, 6, -110, -117, 102, 94, -128, 123, 85, 37, 
        100, 1, 76, 59, -2, -49, 73, 42, 3, -127, 
        -124, 0, 2, -127, -128, 32, -95, 116, 18, -111, 
        110, 93, -12, 28, 114, 123, 81, -120, -67, 43, 
        -29, -121, 56, 23, 84, -15, -96, -122, -64, 83, 
        92, 80, 34, 2, 66, 3, -128, -65, 36, 29, 
        -119, 84, 3, 12, -53, 36, 103, -114, -55, -19, 
        -61, 78, -118, -54, -88, -71, 118, 54, 48, -28, 
        13, 16, 64, 96, -27, 56, 114, -88, -14, -113, 
        -102, 34, 79, -89, -56, 65, 65, -64, -49, -15, 
        73, 84, -85, 116, 104, -120, -53, 110, -62, -12, 
        -112, -82, 36, 62, -91, 43, -63, -4, 63, 65, 
        22, 82, -94, -120, 28, 108, -50, -21, 114, 83, 
        -32, 95, -82, -40, 18, -9, -107, -39, 17, 20, 
        67, -3, -50, 84, -64, -95, 62, 101, 63, 78, 
        35, 126, 9, 120, 115, 114, 0, 20, 106, 97, 
        118, 97, 46, 109, 97, 116, 104, 46, 66, 105, 
        103, 73, 110, 116, 101, 103, 101, 114, -116, -4, 
        -97, 31, -87, 59, -5, 29, 2, 0, 6, 73, 
        0, 8, 98, 105, 116, 67, 111, 117, 110, 116, 
        73, 0, 9, 98, 105, 116, 76, 101, 110, 103, 
        116, 104, 73, 0, 19, 102, 105, 114, 115, 116, 
        78, 111, 110, 122, 101, 114, 111, 66, 121, 116, 
        101, 78, 117, 109, 73, 0, 12, 108, 111, 119, 
        101, 115, 116, 83, 101, 116, 66, 105, 116, 73, 
        0, 6, 115, 105, 103, 110, 117, 109, 91, 0, 
        9, 109, 97, 103, 110, 105, 116, 117, 100, 101, 
        113, 0, 126, 0, 4, 120, 114, 0, 16, 106, 
        97, 118, 97, 46, 108, 97, 110, 103, 46, 78, 
        117, 109, 98, 101, 114, -122, -84, -107, 29, 11, 
        -108, -32, -117, 2, 0, 0, 120, 112, -1, -1, 
        -1, -1, 0, 0, 3, -2, -1, -1, -1, -2, 
        -1, -1, -1, -2, 0, 0, 0, 1, 117, 114, 
        0, 2, 91, 66, -84, -13, 23, -8, 6, 8, 
        84, -32, 2, 0, 0, 120, 112, 0, 0, 0, 
        -128, 32, -95, 116, 18, -111, 110, 93, -12, 28, 
        114, 123, 81, -120, -67, 43, -29, -121, 56, 23, 
        84, -15, -96, -122, -64, 83, 92, 80, 34, 2, 
        66, 3, -128, -65, 36, 29, -119, 84, 3, 12, 
        -53, 36, 103, -114, -55, -19, -61, 78, -118, -54, 
        -88, -71, 118, 54, 48, -28, 13, 16, 64, 96, 
        -27, 56, 114, -88, -14, -113, -102, 34, 79, -89, 
        -56, 65, 65, -64, -49, -15, 73, 84, -85, 116, 
        104, -120, -53, 110, -62, -12, -112, -82, 36, 62, 
        -91, 43, -63, -4, 63, 65, 22, 82, -94, -120, 
        28, 108, -50, -21, 114, 83, -32, 95, -82, -40, 
        18, -9, -107, -39, 17, 20, 67, -3, -50, 84, 
        -64, -95, 62, 101, 63, 78, 35, 126, 9
    };

    SignatureVerifier()
    {
        try
        {
            if(publicKey == null)
            {
                ObjectInputStream objectinputstream = new ObjectInputStream(new ByteArrayInputStream(PUBLIC_KEY));
                publicKey = (PublicKey)objectinputstream.readObject();
                objectinputstream.close();
            }
            msgDigest = MessageDigest.getInstance("SHA1");
            archiveStatus = 0;
        }
        catch(Exception exception)
        {
            exception.printStackTrace();
            archiveStatus = 2;
        }
    }

    void init(byte abyte0[])
    {
        try
        {
            DataInputStream datainputstream = new DataInputStream(new ByteArrayInputStream(abyte0));
            int i = datainputstream.readInt();
            int j = datainputstream.readInt();
            if(j != 20)
                throw new Exception("Unexpected digest length " + j);
            digestData = new byte[20 * i];
            datainputstream.readFully(digestData);
            digestOffset = 0;
            int k = datainputstream.readInt();
            byte abyte1[] = new byte[k];
            datainputstream.readFully(abyte1, 0, k);
            datainputstream.close();
            Signature signature = Signature.getInstance(publicKey.getAlgorithm());
            signature.initVerify(publicKey);
            signature.update(digestData);
            if(!signature.verify(abyte1))
                throw new Exception("Corrupted digests");
            archiveStatus = 1;
        }
        catch(Exception exception)
        {
            archiveStatus = 2;
            exception.printStackTrace();
        }
    }

    int verify(byte abyte0[])
    {
        if(archiveStatus != 1)
            return archiveStatus;
        int i;
        try
        {
            byte abyte1[] = msgDigest.digest(abyte0);
            int j = digestOffset;
            for(int k = 0; k < 20; k++)
                if(abyte1[k] != digestData[j++])
                    return 2;

            i = 1;
        }
        catch(Exception exception)
        {
            exception.printStackTrace();
            i = 2;
        }
        return i;
    }

    void advance()
    {
        digestOffset += 20;
    }

}