Examples with DESKeySpec javax.crypto.spec.DESKeySpec used on opensource projects

Example 21 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project cosmic by MissionCriticalCloud.

the class VncClient method encodePassword.

/**
 * Encode password using DES encryption with given challenge.
 *
 * @param challenge a random set of bytes.
 * @param password  a password
 * @return DES hash of password and challenge
 */
public byte[] encodePassword(final byte[] challenge, final String password) throws Exception {
    // VNC password consist of up to eight ASCII characters.
    // Padding
    final byte[] key = { 0, 0, 0, 0, 0, 0, 0, 0 };
    final byte[] passwordAsciiBytes = password.getBytes(RfbConstants.CHARSET);
    System.arraycopy(passwordAsciiBytes, 0, key, 0, Math.min(password.length(), 8));
    // Flip bytes (reverse bits) in key
    for (int i = 0; i < key.length; i++) {
        key[i] = flipByte(key[i]);
    }
    final KeySpec desKeySpec = new DESKeySpec(key);
    final SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("DES");
    final SecretKey secretKey = secretKeyFactory.generateSecret(desKeySpec);
    final Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
    cipher.init(Cipher.ENCRYPT_MODE, secretKey);
    final byte[] response = cipher.doFinal(challenge);
    return response;
}

Example 22 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project Lazy by l123456789jy.

the class DES method encrypt.

/**
 * 将字符串进行DES加密
 * @param source 未加密源字符串
 * @return 加密后字符串
 */
public String encrypt(String source) {
    byte[] retByte = null;
    // Create SecretKey object
    DESKeySpec dks = null;
    try {
        dks = new DESKeySpec(KEY);
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM);
        SecretKey securekey = keyFactory.generateSecret(dks);
        // Create IvParameterSpec object with initialization vector
        IvParameterSpec spec = new IvParameterSpec(IV);
        // Create Cipter object
        Cipher cipher = Cipher.getInstance(TRANSFORMATION);
        // Initialize Cipher object
        cipher.init(Cipher.ENCRYPT_MODE, securekey, spec);
        // Decrypting data
        retByte = cipher.doFinal(source.getBytes());
        String result = "";
        if (code == 0) {
            result = new String(retByte, "ISO-8859-1");
        } else if (code == 1) {
            result = Base64.encodeToString(retByte, false);
        } else {
            result = new String(retByte);
        }
        return result;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

Example 23 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project Lazy by l123456789jy.

the class DES method decrypt.

/**
 * 将DES加密的字符串解密
 * @param encrypted 加密过的字符串
 * @return 未加密源字符串
 */
public String decrypt(String encrypted) {
    byte[] retByte = null;
    // Create SecretKey object
    DESKeySpec dks = null;
    try {
        dks = new DESKeySpec(KEY);
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM);
        SecretKey securekey = keyFactory.generateSecret(dks);
        // Create IvParameterSpec object with initialization vector
        IvParameterSpec spec = new IvParameterSpec(IV);
        // Create Cipter object
        Cipher cipher = Cipher.getInstance(TRANSFORMATION);
        // Initialize Cipher object
        cipher.init(Cipher.DECRYPT_MODE, securekey, spec);
        if (code == 0) {
            retByte = encrypted.getBytes("ISO-8859-1");
        } else if (code == 1) {
            retByte = Base64.decode(encrypted);
        } else {
            retByte = encrypted.getBytes();
        }
        // Decrypting data
        retByte = cipher.doFinal(retByte);
        return new String(retByte, "utf-8");
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

Example 24 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project orientdb by orientechnologies.

the class ODESEncryption method configure.

public OEncryption configure(final String iOptions) {
    initialized = false;
    if (iOptions == null)
        throw new OSecurityException("DES encryption has been selected, but no key was found. Please configure it by passing the key as property at database create/open. The property key is: '" + OGlobalConfiguration.STORAGE_ENCRYPTION_KEY.getKey() + "'");
    try {
        final byte[] key = OBase64Utils.decode(iOptions);
        final DESKeySpec desKeySpec = new DESKeySpec(key);
        final SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM_NAME);
        theKey = keyFactory.generateSecret(desKeySpec);
        cipher = Cipher.getInstance(TRANSFORMATION);
    } catch (Exception e) {
        throw OException.wrapException(new OInvalidStorageEncryptionKeyException("Cannot initialize DES encryption with current key. Assure the key is a BASE64 - 64 bits long"), e);
    }
    this.initialized = true;
    return this;
}

Example 25 with DESKeySpec

use of javax.crypto.spec.DESKeySpec in project KJFrameForAndroid by kymjs.

the class CipherUtils method getDESKey.

/**
 * 返回可逆算法DES的密钥
 *
 * @param key
 *            前8字节将被用来生成密钥。
 * @return 生成的密钥
 * @throws Exception
 */
public static Key getDESKey(byte[] key) throws Exception {
    DESKeySpec des = new DESKeySpec(key);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    return keyFactory.generateSecret(des);
}