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:LicenseGenerator.java

/**
 * //  w  w w .  j  av  a2 s. c o m
 * 
 * 
 * @param src
 *            ??
 * 
 * @param key
 *            8?
 * 
 * @return ??
 * 
 * @throws Exception
 * 
 */

public static byte[] decrypt(byte[] src, byte[] key) throws Exception {

    // DES????

    SecureRandom sr = new SecureRandom();

    // ?DESKeySpec

    DESKeySpec dks = new DESKeySpec(key);

    // ?DESKeySpec??

    // SecretKey

    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");

    SecretKey securekey = keyFactory.generateSecret(dks);

    // Cipher??

    Cipher cipher = Cipher.getInstance("DES");

    // Cipher

    cipher.init(Cipher.DECRYPT_MODE, securekey, sr);

    // ??

    // ??

    return cipher.doFinal(src);

}

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From source file:org.securityfilter.authenticator.persistent.DefaultPersistentLoginManager.java

/**
 * Set the Encryptin Key used to create a secret key, the secret key is passed
 * to the Cipher object to be used during encryption and decryption of cookie
 * values./*from w  w  w  .j av  a  2 s .com*/
 * <p>
 * <i>NOTE: This entry in the config file must NOT appear before any of the other
 * encryption config entries</i>
 *
 * @param encryptionkey          A String containing the encryption key as
 *                               defined in config file. This is a required
 *                               config entry if protection is set to ALL or ENCRYPTION.
 */
public void setEncryptionKey(String encryptionkey) {
    this.encryptionKey = encryptionkey;
    try {
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(encryptionAlgorithm);
        byte[] desKeyData = encryptionkey.getBytes();
        DESKeySpec desKeySpec = new DESKeySpec(desKeyData);
        secretKey = keyFactory.generateSecret(desKeySpec);
    } catch (Exception e) {
        System.out.println("Error: " + e);
        e.printStackTrace();
    }
}

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From source file:org.bremersee.common.security.crypto.password.PasswordEncoderImpl.java

/**
 * <p>/*from   ww w.  j a  v a 2 s.co  m*/
 * Computes an odd DES key from 56 bits represented as a 7-bytes array.
 * </p>
 * <p>
 * Keeps elements from index {@code offset} to index
 * {@code offset + 7} of supplied array.
 * </p>
 *
 * @param keyData a byte array containing the 56 bits used to compute the DES
 *                key
 * @param offset  the offset of the first element of the 56-bits key data
 * @return the odd DES key generated
 * @throws InvalidKeyException      when key is invalid
 * @throws NoSuchAlgorithmException when algorithm is not available
 * @throws InvalidKeySpecException  when key spec is invalid
 */
private static Key computeDESKey(final byte[] keyData, final int offset)
        throws InvalidKeyException, NoSuchAlgorithmException, InvalidKeySpecException {

    byte[] desKeyData = new byte[8];
    int[] k = new int[7];

    for (int i = 0; i < 7; i++)
        k[i] = unsignedByteToInt(keyData[offset + i]);

    desKeyData[0] = (byte) (k[0] >>> 1);
    desKeyData[1] = (byte) (((k[0] & 0x01) << 6) | (k[1] >>> 2));
    desKeyData[2] = (byte) (((k[1] & 0x03) << 5) | (k[2] >>> 3));
    desKeyData[3] = (byte) (((k[2] & 0x07) << 4) | (k[3] >>> 4));
    desKeyData[4] = (byte) (((k[3] & 0x0F) << 3) | (k[4] >>> 5));
    desKeyData[5] = (byte) (((k[4] & 0x1F) << 2) | (k[5] >>> 6));
    desKeyData[6] = (byte) (((k[5] & 0x3F) << 1) | (k[6] >>> 7));
    desKeyData[7] = (byte) (k[6] & 0x7F);

    for (int i = 0; i < 8; i++)
        desKeyData[i] = (byte) (unsignedByteToInt(desKeyData[i]) << 1);

    KeySpec desKeySpec = new DESKeySpec(desKeyData);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    return keyFactory.generateSecret(desKeySpec);
}

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From source file:com.pdftron.pdf.utils.Utils.java

public static String decryptIt(Context context, String value) {
    String cryptoPass = context.getString(context.getApplicationInfo().labelRes);
    try {//from ww  w .java 2 s .  c o m
        DESKeySpec keySpec = new DESKeySpec(cryptoPass.getBytes("UTF8"));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey key = keyFactory.generateSecret(keySpec);

        byte[] encrypedPwdBytes = Base64.decode(value, Base64.DEFAULT);
        // cipher is not thread safe
        Cipher cipher = Cipher.getInstance("DES");
        cipher.init(Cipher.DECRYPT_MODE, key);
        byte[] decrypedValueBytes = (cipher.doFinal(encrypedPwdBytes));

        String decrypedValue = new String(decrypedValueBytes);
        Log.d("MiscUtils", "Decrypted: " + value + " -> " + decrypedValue);
        return decrypedValue;

    } catch (Exception e) {
        Log.e(e.getClass().getName(), e.getMessage());
    }
    return value;
}

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From source file:com.pdftron.pdf.utils.Utils.java

public static String encryptIt(Context context, String value) {
    String cryptoPass = context.getString(context.getApplicationInfo().labelRes);
    try {//from   w ww  .ja  v a  2  s  .  c om
        DESKeySpec keySpec = new DESKeySpec(cryptoPass.getBytes("UTF8"));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey key = keyFactory.generateSecret(keySpec);

        byte[] clearText = value.getBytes("UTF8");
        // Cipher is not thread safe
        Cipher cipher = Cipher.getInstance("DES");
        cipher.init(Cipher.ENCRYPT_MODE, key);

        String encrypedValue = Base64.encodeToString(cipher.doFinal(clearText), Base64.DEFAULT);
        Log.d("MiscUtils", "Encrypted: " + value + " -> " + encrypedValue);
        return encrypedValue;

    } catch (Exception e) {
        Log.d(e.getClass().getName(), e.getMessage());
    }
    return value;
}

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From source file:dev.ukanth.ufirewall.Api.java

/**
 * Encrypt the password/*from   w  w  w .jav a2  s. co m*/
 * @param key
 * @param data
 * @return
 */
public static String hideCrypt(String key, String data) {
    if (key == null || data == null)
        return null;
    String encodeStr = null;
    try {
        DESKeySpec desKeySpec = new DESKeySpec(key.getBytes(charsetName));
        SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance(algorithm);
        SecretKey secretKey = secretKeyFactory.generateSecret(desKeySpec);
        byte[] dataBytes = data.getBytes(charsetName);
        Cipher cipher = Cipher.getInstance(algorithm);
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        encodeStr = Base64.encodeToString(cipher.doFinal(dataBytes), base64Mode);

    } catch (Exception e) {
        Log.e(TAG, e.getLocalizedMessage());
    }
    return encodeStr;
}

---

From source file:dev.ukanth.ufirewall.Api.java

/**
 * Decrypt the password//from   ww w. j a  va2  s . co  m
 * @param key
 * @param data
 * @return
 */
public static String unhideCrypt(String key, String data) {
    if (key == null || data == null)
        return null;

    String decryptStr = null;
    try {
        byte[] dataBytes = Base64.decode(data, base64Mode);
        DESKeySpec desKeySpec = new DESKeySpec(key.getBytes(charsetName));
        SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance(algorithm);
        SecretKey secretKey = secretKeyFactory.generateSecret(desKeySpec);
        Cipher cipher = Cipher.getInstance(algorithm);
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        byte[] dataBytesDecrypted = (cipher.doFinal(dataBytes));
        decryptStr = new String(dataBytesDecrypted);
    } catch (Exception e) {
        Log.e(TAG, e.getLocalizedMessage());
    }
    return decryptStr;
}

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From source file:com.flexoodb.common.FlexUtils.java

static public String encryptdes(String passkey, String texttoencrypt) throws Exception {
    Security.addProvider(new com.sun.crypto.provider.SunJCE());
    byte key[] = passkey.trim().getBytes();
    DESKeySpec desKeySpec = new DESKeySpec(key);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    SecretKey desKey = keyFactory.generateSecret(desKeySpec);

    Cipher desCipher;/*from ww  w . ja va  2  s .  c o m*/

    // Create the cipher
    desCipher = Cipher.getInstance("DES/ECB/PKCS5Padding");

    // Initialize the cipher for encryption
    desCipher.init(Cipher.ENCRYPT_MODE, desKey);

    // initialize base 64 encoding
    //org.apache.axis.encoding.Base64 base64 = new org.apache.axis.encoding.Base64();
    byte[] cleartext = texttoencrypt.getBytes();

    // Encrypt the cleartext
    byte[] ciphertext = desCipher.doFinal(cleartext);

    // encode to base64
    ciphertext = org.apache.axis.encoding.Base64.encode(ciphertext).getBytes();

    return new String(ciphertext);
}

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From source file:com.flexoodb.common.FlexUtils.java

static public String decryptdes(String passkey, String texttoencrypt) throws Exception {
    Security.addProvider(new com.sun.crypto.provider.SunJCE());

    byte key[] = passkey.trim().getBytes();
    DESKeySpec desKeySpec = new DESKeySpec(key);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    SecretKey desKey = keyFactory.generateSecret(desKeySpec);

    Cipher desCipher;//  www.  j ava 2 s  .  co  m

    // Create the cipher
    desCipher = Cipher.getInstance("DES/ECB/PKCS5Padding");

    // initialize base64 handler
    //org.apache.axis.encoding.Base64 base64 = new org.apache.axis.encoding.Base64();

    // decode from base64 first
    byte[] ciphertext = org.apache.axis.encoding.Base64.decode(new String(texttoencrypt.getBytes()));

    // Initialize the same cipher for decryption
    desCipher.init(Cipher.DECRYPT_MODE, desKey);

    // Decrypt the ciphertext
    byte[] cleartext1 = desCipher.doFinal(ciphertext);

    return new String(cleartext1);

}

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