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:com.dc.tes.License.java

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

    // DES????/*from   w  ww .  ja v  a 2s .  c o m*/

    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.kuali.rice.krad.devtools.maintainablexml.EncryptionService.java

private SecretKey unwrapEncodedKeyOld(String key) throws Exception {
    KeyGenerator keygen = KeyGenerator.getInstance("DES");
    SecretKey desKey = keygen.generateKey();

    // Create the cipher
    Cipher cipher = Cipher.getInstance(ALGORITHM);
    cipher.init((Cipher.UNWRAP_MODE), desKey);

    byte[] bytes = Base64.decodeBase64(key.getBytes());

    // If decoding was done with commons-codec 1.3 and the key not ended with '='
    bytes[6] = 1;/*from  w  ww.ja v a 2 s  . co m*/
    bytes[7] = 1;

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

    DESKeySpec keyspec = new DESKeySpec(bytes);
    SecretKey k = desFactory.generateSecret(keyspec);

    return k;

}

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From source file:com.yaxin.utils.StringUtils.java

/**
 * /*from   ww  w .  j av a  2 s. co 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.xdi.util.security.StringEncrypter.java

/**
 * Decrypt a string encrypted with this encrypter
 * //ww w  .j ava2 s  .  c  o m
 * @param encryptedString
 *            Encrypted string
 * @return Decrypted string
 * @throws EncryptionException
 */
public String decrypt(final String encryptedString, String encryptionKey) throws EncryptionException {
    lock.lock();
    try {
        final byte[] keyAsBytes = encryptionKey.getBytes(StringEncrypter.UNICODE_FORMAT);
        String encryptionScheme = StringEncrypter.DESEDE_ENCRYPTION_SCHEME;
        KeySpec keySpec;
        if (encryptionScheme.equalsIgnoreCase(StringEncrypter.DESEDE_ENCRYPTION_SCHEME)) {
            keySpec = new DESedeKeySpec(keyAsBytes);
        } else if (encryptionScheme.equalsIgnoreCase(StringEncrypter.DES_ENCRYPTION_SCHEME)) {
            keySpec = new DESKeySpec(keyAsBytes);
        } else {
            throw new IllegalArgumentException("Encryption scheme not supported: " + encryptionScheme);
        }
        return decrypt(encryptedString, keySpec);
    } catch (final Exception e) {
        throw new EncryptionException(e);
    } finally {
        lock.unlock();
    }
}

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From source file:org.kuali.rice.kew.documentoperation.web.DocumentContentOperationAction.java

private SecretKey getSecretKey(String encryptionKey) throws Exception {
    KeyGenerator keygen = KeyGenerator.getInstance("DES");
    SecretKey desKey = keygen.generateKey();

    // Create the cipher
    Cipher cipher = Cipher.getInstance(ALGORITHM);
    cipher.init((Cipher.UNWRAP_MODE), desKey);

    byte[] bytes = Base64.decodeBase64(encryptionKey.getBytes());

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

    DESKeySpec keyspec = new DESKeySpec(bytes);
    desKey = desFactory.generateSecret(keyspec);
    // Create the cipher
    cipher.init((Cipher.WRAP_MODE), desKey);
    return desKey;
}

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From source file:com.ubipass.middleware.ems.EMSUtil.java

/**
 * set all licence parameters//from ww  w . ja  v a  2  s . c o  m
 * 
 * @throws Exception
 */
private static void setParameters() throws Exception {

    File file = new File(path + LICENCE_FILE);
    FileInputStream is;

    try {
        is = new FileInputStream(file);
    } catch (FileNotFoundException e) {
        throw new InvalidLicenseException();
    }

    Properties properties = new Properties();
    properties.load(is);

    userName = properties.getProperty("userName");
    licenceKey = properties.getProperty("licenceKey");

    if (userName == null || licenceKey == null) {
        throw new InvalidLicenseException();
    }

    // DES????
    SecureRandom sr = new SecureRandom();

    byte rawKeyData[] = (userName + "midware").getBytes();

    // ?DESKeySpec
    DESKeySpec dks = new DESKeySpec(rawKeyData);

    // ?DESKeySpec??
    // SecretKey
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    SecretKey key = keyFactory.generateSecret(dks);

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

    // ?Cipher
    cipher.init(Cipher.DECRYPT_MODE, key, sr);

    // ??
    licenceKey = new String(cipher.doFinal(Base64.decodeBase64(licenceKey.getBytes())));

    String tmpStr[] = licenceKey.split("-");

    if (tmpStr.length != 2)
        throw new InvalidLicenseException();

    licenceUser = tmpStr[0];
    licenceExpDate = tmpStr[1];

}

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From source file:com.glaf.core.security.SecurityUtils.java

/**
 * ??/*w w  w . j  a va2s  .c  o m*/
 * 
 * @param ctx
 *            
 * @param envelope
 *            ?
 * @param privateKey
 *            ?
 * @return key 
 */
public static Key openDigitalEnvelope(SecurityContext ctx, String envelope, Key privateKey) {
    try {
        Cipher cipher = Cipher.getInstance(ctx.getAsymmetryAlgorithm(), ctx.getJceProvider());
        cipher.init(Cipher.DECRYPT_MODE, privateKey);
        envelope = StringTools.replaceIgnoreCase(envelope, " ", "");
        byte[] key = cipher.doFinal(Base64.decodeBase64(envelope));

        SecretKeyFactory skf = SecretKeyFactory.getInstance(ctx.getSymmetryKeyAlgorithm(),
                ctx.getJceProvider());
        DESKeySpec keySpec = new DESKeySpec(key);
        Key symmetryKey = skf.generateSecret(keySpec);

        return symmetryKey;
    } catch (Exception ex) {
        throw new SecurityException(ex);
    }
}

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From source file:org.xdi.util.security.StringEncrypter.java

/**
 * Encrypt a string//from   w w w.  j a v  a2s . c  om
 * 
 * @param unencryptedString
 *            String to encrypt
 * @return Encrypted string (using scheme and key specified at construction)
 * @throws EncryptionException
 */
public String encrypt(final String unencryptedString, String encryptionKey) throws EncryptionException {
    lock.lock();
    try {
        final byte[] keyAsBytes = encryptionKey.getBytes(StringEncrypter.UNICODE_FORMAT);
        String encryptionScheme = StringEncrypter.DESEDE_ENCRYPTION_SCHEME;
        KeySpec keySpec;
        if (encryptionScheme.equalsIgnoreCase(StringEncrypter.DESEDE_ENCRYPTION_SCHEME)) {
            keySpec = new DESedeKeySpec(keyAsBytes);
        } else if (encryptionScheme.equalsIgnoreCase(StringEncrypter.DES_ENCRYPTION_SCHEME)) {
            keySpec = new DESKeySpec(keyAsBytes);
        } else {
            throw new IllegalArgumentException("Encryption scheme not supported: " + encryptionScheme);
        }

        return encrypt(unencryptedString, keySpec);
    } catch (final Exception e) {
        throw new EncryptionException(e);
    } finally {
        lock.unlock();
    }
}

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From source file:com.grazerss.EntryManager.java

private static SecretKey getSecretKey() throws InvalidKeyException, UnsupportedEncodingException,
        NoSuchAlgorithmException, InvalidKeySpecException {
    DESKeySpec keySpec = new DESKeySpec("EntryManager.class".getBytes("UTF8"));
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    SecretKey secretKey = keyFactory.generateSecret(keySpec);
    return secretKey;
}

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From source file:LicenseGenerator.java

/**
 * //from  w  w w.ja v a  2s .  c o  m
 * 
 * 
 * @param src
 *            ??
 * 
 * @param key
 *            8?
 * 
 * @return ??
 * 
 * @throws Exception
 * 
 */

public static byte[] encrypt(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.ENCRYPT_MODE, securekey, sr);

    // ??

    // ??

    return cipher.doFinal(src);

}

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