Example usage for javax.crypto.spec DESKeySpec DESKeySpec

Introduction

In this page you can find the example usage for javax.crypto.spec DESKeySpec DESKeySpec.

Prototype

public DESKeySpec(byte[] key) throws InvalidKeyException 

Source Link

Document

Creates a DESKeySpec object using the first 8 bytes in key as the key material for the DES key.

Usage

From source file:MainClass.java

public static void main(String args[]) throws Exception {
    ObjectInputStream ois = new ObjectInputStream(new FileInputStream("keyfile"));
    DESKeySpec ks = new DESKeySpec((byte[]) ois.readObject());
    SecretKeyFactory skf = SecretKeyFactory.getInstance("DES");
    SecretKey key = skf.generateSecret(ks);

    Cipher c = Cipher.getInstance("DES/CFB8/NoPadding");
    c.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec((byte[]) ois.readObject()));
    CipherInputStream cis = new CipherInputStream(new FileInputStream("ciphertext"), c);
    BufferedReader br = new BufferedReader(new InputStreamReader(cis));
    System.out.println(br.readLine());
}

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From source file:TestCipher.java

public static void main(String args[]) throws Exception {
    Set set = new HashSet();
    Random random = new Random();
    for (int i = 0; i < 10; i++) {
        Point point = new Point(random.nextInt(1000), random.nextInt(2000));
        set.add(point);//from ww w  . j a  va 2  s  . com
    }
    int last = random.nextInt(5000);

    // Create Key
    byte key[] = password.getBytes();
    DESKeySpec desKeySpec = new DESKeySpec(key);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    SecretKey secretKey = keyFactory.generateSecret(desKeySpec);

    // Create Cipher
    Cipher desCipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
    desCipher.init(Cipher.ENCRYPT_MODE, secretKey);

    // Create stream
    FileOutputStream fos = new FileOutputStream("out.des");
    BufferedOutputStream bos = new BufferedOutputStream(fos);
    CipherOutputStream cos = new CipherOutputStream(bos, desCipher);
    ObjectOutputStream oos = new ObjectOutputStream(cos);

    // Write objects
    oos.writeObject(set);
    oos.writeInt(last);
    oos.flush();
    oos.close();

    // Change cipher mode
    desCipher.init(Cipher.DECRYPT_MODE, secretKey);

    // Create stream
    FileInputStream fis = new FileInputStream("out.des");
    BufferedInputStream bis = new BufferedInputStream(fis);
    CipherInputStream cis = new CipherInputStream(bis, desCipher);
    ObjectInputStream ois = new ObjectInputStream(cis);

    // Read objects
    Set set2 = (Set) ois.readObject();
    int last2 = ois.readInt();
    ois.close();

    // Compare original with what was read back
    int count = 0;
    if (set.equals(set2)) {
        System.out.println("Set1: " + set);
        System.out.println("Set2: " + set2);
        System.out.println("Sets are okay.");
        count++;
    }
    if (last == last2) {
        System.out.println("int1: " + last);
        System.out.println("int2: " + last2);
        System.out.println("ints are okay.");
        count++;
    }
    if (count != 2) {
        System.out.println("Problem during encryption/decryption");
    }
}

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From source file:MainClass.java

public static void main(String args[]) throws Exception {

    KeyGenerator keyGen = KeyGenerator.getInstance("DES");
    SecureRandom random = SecureRandom.getInstance("SHA1PRNG", "SUN");
    random.setSeed(101L);//from  ww  w . j  a va  2s . c o  m
    keyGen.init(56, random);
    SecretKey sKey = keyGen.generateKey();
    SecretKeyFactory kfactory = SecretKeyFactory.getInstance("DES");

    DESKeySpec kspec = (DESKeySpec) kfactory.getKeySpec(sKey, DESKeySpec.class);

    System.out.println(sKey);
    FileOutputStream fos = new FileOutputStream("secretKeys");
    ObjectOutputStream oos = new ObjectOutputStream(fos);

    oos.writeObject(kspec.getKey());

    FileInputStream fin = new FileInputStream("secretKeys");
    ObjectInputStream ois = new ObjectInputStream(fin);

    byte[] kMaterial = (byte[]) ois.readObject();

    DESKeySpec keyspec = new DESKeySpec(kMaterial);
    SecretKey newKey = kfactory.generateSecret(keyspec);
    System.out.println(newKey);
    System.out.println("Do the keys equal :" + newKey.equals(sKey));

}

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From source file:DataStudioCrak.java

public static void main(String[] args) {
    String company = "labthink";
    byte[] companyByteArray = company.getBytes();
    byte[] companyByteIntArray = intToByteArray(compute(companyByteArray, companyByteArray.length));
    // byte[] ff = "zhulixia".getBytes();
    byte[] snByte = new byte[32];
    byte[] byte1 = new byte[] { 7, 1 };
    byte[] byte2 = "zhaodapengpojiehahahahahaha".getBytes();
    byte[] byte3 = new byte[] { 127 };
    byte[] snMain = new byte[24];
    System.arraycopy(byte1, 0, snMain, 0, 2);
    System.arraycopy(byte2, 0, snMain, 2, 17);
    System.arraycopy(companyByteIntArray, 0, snMain, 19, 4);
    System.arraycopy(byte3, 0, snMain, 23, 1);
    //  1 - single license,2 - site license ,3 educational license
    snMain[2] = (byte) 1;
    int intSn = compute(snMain, snMain.length);
    System.out.println("intSn=" + intSn);
    byte[] key1 = "dddd".getBytes();
    byte[] key2 = intToByteArray(intSn);
    byte[] key = new byte[8];
    System.arraycopy(key1, 0, key, 0, 4);
    System.arraycopy(key2, 0, key, 4, 4);

    byte encodedSnMain[] = new byte[snMain.length];
    try {/*w w  w. j a  va 2s  .co m*/
        DESKeySpec deskeyspec = new DESKeySpec(key);
        javax.crypto.SecretKey secretkey = SecretKeyFactory.getInstance("DES").generateSecret(deskeyspec);
        Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
        cipher.init(Cipher.ENCRYPT_MODE, secretkey);
        cipher.update(snMain, 0, snMain.length, encodedSnMain);
        cipher.doFinal();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    System.arraycopy(key1, 0, snByte, 0, 4);
    System.arraycopy(key2, 0, snByte, 28, 4);
    System.arraycopy(encodedSnMain, 0, snByte, 4, 24);
    char[] snCharArray = Hex.encodeHex(snByte);
    String sn = new String(snCharArray);
    System.out.println("sn=" + sn);
}

---

From source file:net.labthink.run.DataStudioCrak.java

public static void main(String[] args) {
    String company = "Labthink";
    byte[] companyByteArray = company.getBytes();
    byte[] companyByteIntArray = intToByteArray(compute(companyByteArray, companyByteArray.length));
    // byte[] ff = "zhulixia".getBytes();
    byte[] snByte = new byte[32];
    byte[] byte1 = new byte[] { 7, 1 };
    byte[] byte2 = "zhaodapengpojiehahahahahaha".getBytes();
    byte[] byte3 = new byte[] { 127 };
    byte[] snMain = new byte[24];
    System.arraycopy(byte1, 0, snMain, 0, 2);
    System.arraycopy(byte2, 0, snMain, 2, 17);
    System.arraycopy(companyByteIntArray, 0, snMain, 19, 4);
    System.arraycopy(byte3, 0, snMain, 23, 1);
    //  1 - single license,2 - site license ,3 educational license
    snMain[2] = (byte) 1;
    int intSn = compute(snMain, snMain.length);
    System.out.println("intSn=" + intSn);
    byte[] key1 = "dddd".getBytes();
    byte[] key2 = intToByteArray(intSn);
    byte[] key = new byte[8];
    System.arraycopy(key1, 0, key, 0, 4);
    System.arraycopy(key2, 0, key, 4, 4);

    byte encodedSnMain[] = new byte[snMain.length];
    try {//from  w w  w. j a  v a  2 s . c  o  m
        DESKeySpec deskeyspec = new DESKeySpec(key);
        javax.crypto.SecretKey secretkey = SecretKeyFactory.getInstance("DES").generateSecret(deskeyspec);
        Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
        cipher.init(Cipher.ENCRYPT_MODE, secretkey);
        cipher.update(snMain, 0, snMain.length, encodedSnMain);
        cipher.doFinal();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    System.arraycopy(key1, 0, snByte, 0, 4);
    System.arraycopy(key2, 0, snByte, 28, 4);
    System.arraycopy(encodedSnMain, 0, snByte, 4, 24);
    char[] snCharArray = Hex.encodeHex(snByte);
    String sn = new String(snCharArray);
    System.out.println("sn=" + sn);
}

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From source file:uk.ac.ox.webauth.crypto.DesCbcCrc.java

public static void main(String[] args) throws Exception {
    /* mod-crc-32 tests from RFC 3961 section A.5:
       mod-crc-32("foo") =                                     33 bc 32 73
       mod-crc-32("test0123456789") =                          d6 88 3e b8
       mod-crc-32("MASSACHVSETTS INSTITVTE OF TECHNOLOGY") =   f7 80 41 e3
       mod-crc-32(8000) =                                      4b 98 83 3b
       mod-crc-32(0008) =                                      32 88 db 0e
       mod-crc-32(0080) =                                      20 83 b8 ed
       mod-crc-32(80) =                                        20 83 b8 ed
       mod-crc-32(80000000) =                                  3b b6 59 ed
       mod-crc-32(00000001) =                                  96 30 07 77
    *///from   w  w w.j  a v a  2s . c  o m
    test_modifiedCRC32(new String(Hex.encodeHex("foo".getBytes())), "33bc3273");
    test_modifiedCRC32(new String(Hex.encodeHex("test0123456789".getBytes())), "d6883eb8");
    test_modifiedCRC32(new String(Hex.encodeHex("MASSACHVSETTS INSTITVTE OF TECHNOLOGY".getBytes())),
            "f78041e3");
    test_modifiedCRC32("8000", "4b98833b");
    test_modifiedCRC32("0008", "3288db0e");
    test_modifiedCRC32("0080", "2083b8ed");
    test_modifiedCRC32("80", "2083b8ed");
    test_modifiedCRC32("80000000", "3bb659ed");
    test_modifiedCRC32("00000001", "96300777");
    SecretKeyFactory factory = SecretKeyFactory.getInstance("DES");
    KeySpec spec = new DESKeySpec(new byte[8]);
    SecretKey secretKey = factory.generateSecret(spec);
    ASN1Encodable apo = new APOptions();
    DesCbcCrc dcc = new DesCbcCrc(secretKey);
    byte[] encrypted = dcc.encrypt(apo);
    apo = dcc.decrypt(encrypted);
    System.out.println("Encrypt-decrypt test successful.");
}

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From source file:Main.java

public static String deCrypto(String txt, String key) {
    SecretKeyFactory skeyFactory = null;
    Cipher cipher = null;/*from  www.j a  v  a  2s  .  c  o  m*/
    byte[] btxts = null;
    try {
        DESKeySpec desKeySpec = new DESKeySpec(key.getBytes());
        skeyFactory = SecretKeyFactory.getInstance("DES");
        cipher = Cipher.getInstance("DES");
        SecretKey deskey = skeyFactory.generateSecret(desKeySpec);
        cipher.init(Cipher.DECRYPT_MODE, deskey);
        btxts = new byte[txt.length() / 2];
        for (int i = 0, count = txt.length(); i < count; i += 2) {
            btxts[i / 2] = (byte) Integer.parseInt(txt.substring(i, i + 2), 16);
        }
        return (new String(cipher.doFinal(btxts)));
    } catch (Exception e) {
        e.printStackTrace();
    }

    return null;

}

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From source file:Main.java

public static String enCrypto(String txt, String key) {

    if (txt != null && !"".equals(txt) && !"null".equals(txt)) {

        try {/*from  w ww.  j  ava2 s .c om*/

            StringBuffer sb = new StringBuffer();
            DESKeySpec desKeySpec = new DESKeySpec(key.getBytes());
            SecretKeyFactory skeyFactory = null;
            Cipher cipher = null;
            try {
                skeyFactory = SecretKeyFactory.getInstance("DES");
                cipher = Cipher.getInstance("DES");
            } catch (NoSuchAlgorithmException e) {
                e.printStackTrace();
            }
            SecretKey deskey = skeyFactory.generateSecret(desKeySpec);
            cipher.init(Cipher.ENCRYPT_MODE, deskey);
            byte[] cipherText = cipher.doFinal(txt.getBytes());
            for (int n = 0; n < cipherText.length; n++) {
                String stmp = (java.lang.Integer.toHexString(cipherText[n] & 0XFF));
                if (stmp.length() == 1) {
                    sb.append("0" + stmp);
                } else {
                    sb.append(stmp);
                }
            }
            return sb.toString().toUpperCase(Locale.US);

        } catch (Exception e) {

            e.printStackTrace();
        }
    }
    return null;
}

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From source file:Encrypt.java

private static String decrypt(String message) throws Exception {
    byte[] bytesrc = convertHexString(message);
    Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
    DESKeySpec desKeySpec = new DESKeySpec(key.getBytes("UTF-8"));
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
    IvParameterSpec iv = new IvParameterSpec(key.getBytes("UTF-8"));

    cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);
    byte[] retByte = cipher.doFinal(bytesrc);
    return new String(retByte);
}

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From source file:Main.java

public static Key getDESKey(byte[] key) throws Exception {
    DESKeySpec des = new DESKeySpec(key);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    return keyFactory.generateSecret(des);
}

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