Java SecretKeyFactory類代碼示例

import javax.crypto.SecretKeyFactory; //導入依賴的package包/類
/**
* 加密
* @param datasource byte[]
* @param password String
* @return byte[]
*/
public static String encrypt(String datasource, String password) {
	try {
		if(StringUtils.trimToNull(datasource) == null){
			return null;
		}
		SecureRandom random = new SecureRandom();
		DESKeySpec desKey = new DESKeySpec(password.getBytes());
		// 創建一個密匙工廠，然後用它把DESKeySpec轉換成
		SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
		SecretKey securekey = keyFactory.generateSecret(desKey);
		// Cipher對象實際完成加密操作
		Cipher cipher = Cipher.getInstance("DES");
		// 用密匙初始化Cipher對象
		cipher.init(Cipher.ENCRYPT_MODE, securekey, random);
		// 現在，獲取數據並加密
		// 正式執行加密操作
		 return new BASE64Encoder().encode(cipher.doFinal(datasource.getBytes()));
		
	} catch (Throwable e) {
		e.printStackTrace();
	}
	return null;
}
 

import javax.crypto.SecretKeyFactory; //導入依賴的package包/類
private static byte[] calculatePbeMac(
    DERObjectIdentifier oid,
    byte[]              salt,
    int                 itCount,
    char[]              password,
    byte[]              data,
    String              provider)
    throws Exception
{
    SecretKeyFactory keyFact = SecretKeyFactory.getInstance(oid.getId(), provider);
    PBEParameterSpec defParams = new PBEParameterSpec(salt, itCount);
    PBEKeySpec pbeSpec = new PBEKeySpec(password);
    SecretKey key = keyFact.generateSecret(pbeSpec);

    Mac mac = Mac.getInstance(oid.getId(), provider);
    mac.init(key, defParams);
    mac.update(data);

    return mac.doFinal();
}
 

import javax.crypto.SecretKeyFactory; //導入依賴的package包/類
/**
 * A function that generates password-based AES & HMAC keys. It prints out exceptions but
 * doesn't throw them since none should be encountered. If they are
 * encountered, the return value is null.
 *
 * @param password The password to derive the keys from.
 * @return The AES & HMAC keys.
 * @throws GeneralSecurityException if AES is not implemented on this system,
 *                                  or a suitable RNG is not available
 */
public static SecretKeys generateKeyFromPassword(String password, byte[] salt) throws GeneralSecurityException {
    fixPrng();
    //Get enough random bytes for both the AES key and the HMAC key:
    KeySpec keySpec = new PBEKeySpec(password.toCharArray(), salt,
            PBE_ITERATION_COUNT, AES_KEY_LENGTH_BITS + HMAC_KEY_LENGTH_BITS);
    SecretKeyFactory keyFactory = SecretKeyFactory
            .getInstance(PBE_ALGORITHM);
    byte[] keyBytes = keyFactory.generateSecret(keySpec).getEncoded();

    // Split the random bytes into two parts:
    byte[] confidentialityKeyBytes = copyOfRange(keyBytes, 0, AES_KEY_LENGTH_BITS /8);
    byte[] integrityKeyBytes = copyOfRange(keyBytes, AES_KEY_LENGTH_BITS /8, AES_KEY_LENGTH_BITS /8 + HMAC_KEY_LENGTH_BITS /8);

    //Generate the AES key
    SecretKey confidentialityKey = new SecretKeySpec(confidentialityKeyBytes, CIPHER);

    //Generate the HMAC key
    SecretKey integrityKey = new SecretKeySpec(integrityKeyBytes, HMAC_ALGORITHM);

    return new SecretKeys(confidentialityKey, integrityKey);
}
 

import javax.crypto.SecretKeyFactory; //導入依賴的package包/類
private static byte[] PBKDF2(char[] secret, byte[] salt,
    int count, int keyLength) throws GeneralSecurityException {

    PBEKeySpec keySpec = new PBEKeySpec(secret, salt, count, keyLength);
    SecretKeyFactory skf =
            SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
    SecretKey key = skf.generateSecret(keySpec);
    byte[] result = key.getEncoded();

    return result;
}
 

import javax.crypto.SecretKeyFactory; //導入依賴的package包/類
public PKCS8EncodedKeySpec getEncodedPrivateKeySpec(String key, String password) throws Exception {
    String privateKeyPEM = key
            .replace("-----BEGIN ENCRYPTED PRIVATE KEY-----", "")
            .replace("-----END ENCRYPTED PRIVATE KEY-----", "")
            .replaceAll("\\s", "");

    // decode to get the binary DER representation
    byte[] privateKeyDER = Base64.getDecoder().decode(privateKeyPEM);

    EncryptedPrivateKeyInfo epkInfo = new EncryptedPrivateKeyInfo(privateKeyDER);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(epkInfo.getAlgName());
    PBEKeySpec pbeKeySpec = new PBEKeySpec(password.toCharArray());
    SecretKey pbeKey = keyFactory.generateSecret(pbeKeySpec);

    Cipher cipher = Cipher.getInstance(epkInfo.getAlgName());
    cipher.init(Cipher.DECRYPT_MODE, pbeKey, epkInfo.getAlgParameters());

    return epkInfo.getKeySpec(cipher);
}
 

import javax.crypto.SecretKeyFactory; //導入依賴的package包/類
/**
     * 數據解密，算法（DES）
     *
     * @param cryptData
     *            加密數據
     * @param desKey DES密鑰
     * @return 解密後的數據
     */
    public static String decrypt(String cryptData, byte[] desKey) {
        String decryptedData = null;
        try {
            // DES算法要求有一個可信任的隨機數源
            SecureRandom sr = new SecureRandom();
            DESKeySpec deskey = new DESKeySpec(desKey);
            // 創建一個密匙工廠，然後用它把DESKeySpec轉換成一個SecretKey對象
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
            SecretKey key = keyFactory.generateSecret(deskey);
            // 解密對象
            Cipher cipher = Cipher.getInstance("DES");
            cipher.init(Cipher.DECRYPT_MODE, key, sr);
            // 把字符串解碼為字節數組，並解密
            decryptedData = new String(cipher.doFinal(Base64.getDecoder().decode(cryptData)));
        } catch (Exception e) {
//            log.error("解密錯誤，錯誤信息：", e);
            throw new RuntimeException("解密錯誤，錯誤信息：", e);
        }
        return decryptedData;
    }
 

import javax.crypto.SecretKeyFactory; //導入依賴的package包/類
/**
 * DES
 * @param src
 * @param password
 * @return
 */
public static byte[] decrypt(byte []src, String password) {
    try {
        // DES算法要求有一個可信任的隨機數源
        SecureRandom random = new SecureRandom();
        // 創建一個DESKeySpec對象
        DESKeySpec desKey = new DESKeySpec(password.getBytes());
        // 創建一個密匙工廠
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        // 將DESKeySpec對象轉換成SecretKey對象
        SecretKey securekey = keyFactory.generateSecret(desKey);
        // Cipher對象實際完成解密操作
        Cipher cipher = Cipher.getInstance("DES");
        // 用密匙初始化Cipher對象
        cipher.init(Cipher.DECRYPT_MODE, securekey, random);
        // 真正開始解密操作
        return cipher.doFinal(src);
    } catch (Throwable e) {
        e.printStackTrace();
    }

    return null;
}
 

import javax.crypto.SecretKeyFactory; //導入依賴的package包/類
/**
 * DES加密
 * 
 * @author : chenssy
 * @date : 2016年5月20日 下午5:51:37
 *
 * @param data
 * 				待加密字符串
 * @param key
 * 				校驗位
 * @return
 */
   @SuppressWarnings("restriction")
protected static String encrypt(String data,String key) {  
       String encryptedData = null;  
       try {  
           // DES算法要求有一個可信任的隨機數源  
           SecureRandom sr = new SecureRandom();  
           DESKeySpec deskey = new DESKeySpec(key.getBytes());  
           // 創建一個密匙工廠，然後用它把DESKeySpec轉換成一個SecretKey對象  
           SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");  
           SecretKey secretKey = keyFactory.generateSecret(deskey);  
           // 加密對象  
           Cipher cipher = Cipher.getInstance("DES");  
           cipher.init(Cipher.ENCRYPT_MODE, secretKey, sr);  
           // 加密，並把字節數組編碼成字符串  
           encryptedData = new sun.misc.BASE64Encoder().encode(cipher.doFinal(data.getBytes()));  
       } catch (Exception e) {  
           throw new RuntimeException("加密錯誤，錯誤信息：", e);  
       }  
       return encryptedData;  
   }
 

import javax.crypto.SecretKeyFactory; //導入依賴的package包/類
private SecretKey getPBEKey(char[] password) throws IOException
{
    SecretKey skey = null;

    try {
        PBEKeySpec keySpec = new PBEKeySpec(password);
        SecretKeyFactory skFac = SecretKeyFactory.getInstance("PBE");
        skey = skFac.generateSecret(keySpec);
        keySpec.clearPassword();
    } catch (Exception e) {
       throw new IOException("getSecretKey failed: " +
                             e.getMessage(), e);
    }
    return skey;
}
 

import javax.crypto.SecretKeyFactory; //導入依賴的package包/類
/**
* 解密
* @param src byte[]
* @param password String
* @return String
* @throws Exception
*/
public static String decrypt(String decodeStr, String password) throws Exception {
	byte[] str=new BASE64Decoder().decodeBuffer(decodeStr);
	// DES算法要求有一個可信任的隨機數源
	SecureRandom random = new SecureRandom();
	// 創建一個DESKeySpec對象
	DESKeySpec desKey = new DESKeySpec(password.getBytes());
	// 創建一個密匙工廠
	SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
	// 將DESKeySpec對象轉換成SecretKey對象
	SecretKey securekey = keyFactory.generateSecret(desKey);
	// Cipher對象實際完成解密操作
	Cipher cipher = Cipher.getInstance("DES");
	// 用密匙初始化Cipher對象
	cipher.init(Cipher.DECRYPT_MODE, securekey, random);
	// 真正開始解密操作
	byte[] passByte=cipher.doFinal(str);
	return new String(passByte);
}
 

import javax.crypto.SecretKeyFactory; //導入依賴的package包/類
/**
 * @param salt an array of random bytes to use for each (un)obfuscation
 * @param applicationId application identifier, e.g. the package name
 * @param deviceId device identifier. Use as many sources as possible to
 *    create this unique identifier.
 */
public AESObfuscator(byte[] salt, String applicationId, String deviceId) {
    try {
        SecretKeyFactory factory = SecretKeyFactory.getInstance(KEYGEN_ALGORITHM);
        KeySpec keySpec =
            new PBEKeySpec((applicationId + deviceId).toCharArray(), salt, 1024, 256);
        SecretKey tmp = factory.generateSecret(keySpec);
        SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "AES");
        mEncryptor = Cipher.getInstance(CIPHER_ALGORITHM);
        mEncryptor.init(Cipher.ENCRYPT_MODE, secret, new IvParameterSpec(IV));
        mDecryptor = Cipher.getInstance(CIPHER_ALGORITHM);
        mDecryptor.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(IV));
    } catch (GeneralSecurityException e) {
        // This can't happen on a compatible Android device.
        throw new RuntimeException("Invalid environment", e);
    }
}
 

import javax.crypto.SecretKeyFactory; //導入依賴的package包/類
/**
 * The key is generating by SecretKeyFactory and its value just copying
 * in the key field of MySecretKey class. So, this is real key derived
 * using the given algo.
 */
public MyPBKDF2SecretKey(String passPhrase, String algo, byte[] salt1,
        int iterationCount, int keySize)
        throws InvalidKeySpecException, NoSuchAlgorithmException {
    algorithm = algo;
    salt = salt1;
    itereationCount = iterationCount;
    pass = passPhrase;

    PBEKeySpec spec = new PBEKeySpec(passPhrase.toCharArray(), salt,
            iterationCount, keySize);

    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(algo);

    SecretKey realKey = keyFactory.generateSecret(spec);

    keyLength = realKey.getEncoded().length;

    key = new byte[keyLength];
    System.arraycopy(realKey.getEncoded(), 0, key, 0, keyLength);
}
 

import javax.crypto.SecretKeyFactory; //導入依賴的package包/類
public boolean passwordsMatch(Object submittedPlaintext, String encrypted) {
    ByteSource plaintextBytes = ByteSource.Util.bytes(submittedPlaintext);
    if (encrypted == null || encrypted.length() == 0) {
        return plaintextBytes == null || plaintextBytes.isEmpty();
    } else {
        if (plaintextBytes == null || plaintextBytes.isEmpty()) {
            return false;
        }
    }
    String plaintext = new String(plaintextBytes.getBytes());
    String[] tokens = encrypted.split("\\$");
    int iterations = Integer.parseInt(tokens[1]);
    byte[] salt = tokens[2].getBytes();
    String hash = tokens[3];

    KeySpec spec = new PBEKeySpec(plaintext.toCharArray(), salt, iterations, 256);
    try {
        String algorithmName = getAlgorithmFullName(tokens[0]);
        SecretKeyFactory f = SecretKeyFactory.getInstance(algorithmName);
        return hash.equals(Base64.encodeToString(f.generateSecret(spec).getEncoded()));
    } catch (Exception e) {
        log.error(e.getMessage());
        return false;
    }
}
 

import javax.crypto.SecretKeyFactory; //導入依賴的package包/類
public static PKCS8EncodedKeySpec getEncodedPrivateKeySpec(String key, String password) throws Exception {
    String privateKeyPEM = key
            .replace("-----BEGIN ENCRYPTED PRIVATE KEY-----", "")
            .replace("-----END ENCRYPTED PRIVATE KEY-----", "")
            .replaceAll("\\s", "");

    // decode to get the binary DER representation
    byte[] privateKeyDER = Base64.getDecoder().decode(privateKeyPEM);

    EncryptedPrivateKeyInfo epkInfo = new EncryptedPrivateKeyInfo(privateKeyDER);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(epkInfo.getAlgName());
    PBEKeySpec pbeKeySpec = new PBEKeySpec(password.toCharArray());
    SecretKey pbeKey = keyFactory.generateSecret(pbeKeySpec);

    Cipher cipher = Cipher.getInstance(epkInfo.getAlgName());
    cipher.init(Cipher.DECRYPT_MODE, pbeKey, epkInfo.getAlgParameters());

    return epkInfo.getKeySpec(cipher);
}
 

import javax.crypto.SecretKeyFactory; //導入依賴的package包/類
private static PKCS8EncodedKeySpec readPrivateKey(File keyFile, Optional<String> keyPassword)
        throws IOException, GeneralSecurityException
{
    String content = Files.toString(keyFile, US_ASCII);

    Matcher matcher = KEY_PATTERN.matcher(content);
    if (!matcher.find()) {
        throw new KeyStoreException("found no private key: " + keyFile);
    }
    byte[] encodedKey = base64Decode(matcher.group(1));

    if (!keyPassword.isPresent()) {
        return new PKCS8EncodedKeySpec(encodedKey);
    }

    EncryptedPrivateKeyInfo encryptedPrivateKeyInfo = new EncryptedPrivateKeyInfo(encodedKey);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(encryptedPrivateKeyInfo.getAlgName());
    SecretKey secretKey = keyFactory.generateSecret(new PBEKeySpec(keyPassword.get().toCharArray()));

    Cipher cipher = Cipher.getInstance(encryptedPrivateKeyInfo.getAlgName());
    cipher.init(DECRYPT_MODE, secretKey, encryptedPrivateKeyInfo.getAlgParameters());

    return encryptedPrivateKeyInfo.getKeySpec(cipher);
}