Example usage for javax.crypto Cipher getInstance

List of usage examples for javax.crypto Cipher getInstance

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Introduction

In this page you can find the example usage for javax.crypto Cipher getInstance.

Prototype

public static final Cipher getInstance(String transformation)
        throws NoSuchAlgorithmException, NoSuchPaddingException

Source Link

Document

Returns a Cipher object that implements the specified transformation.

Usage

From source file:de.adorsys.morphiaencryption.AES256CryptoProvider.java

@Override
public byte[] decrypt(byte[] encData) {
    try {//w w w.  j  a v a2  s  .  c o m
        Cipher cipher = Cipher.getInstance(AES_CBC_PKCS5_PADDING);
        cipher.init(Cipher.DECRYPT_MODE, key, getIV());
        byte[] decrypted = cipher.doFinal(encData);
        return decrypted;
    } catch (BadPaddingException | IllegalBlockSizeException | InvalidKeyException
            | InvalidAlgorithmParameterException | NoSuchAlgorithmException | NoSuchPaddingException e) {
        throw new CryptException(e);
    }
}

From source file:com.demandware.vulnapp.challenge.impl.ECBOracleChallenge.java

protected ECBOracleChallenge(String name) {
    super(name);/* www . j av  a2s .co  m*/
    this.keyType = "AES";
    this.encryptionType = "AES/ECB/NoPadding";
    try {
        SecretKey key = generateKey();
        this.eCipher = Cipher.getInstance(this.encryptionType);
        this.eCipher.init(Cipher.ENCRYPT_MODE, key);
        this.dCipher = Cipher.getInstance(this.encryptionType);
        this.dCipher.init(Cipher.DECRYPT_MODE, key);
    } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException e) {
        throw new SetupRuntimeException(e);
    }
    tryRoundtrip();
}

From source file:com.adaptris.security.password.AesCrypto.java

public String decode(String encrypted, String charset) throws PasswordException {

    String encryptedString = encrypted;
    String result;//from   w w  w. ja  va  2  s .com

    if (encrypted.startsWith(Password.PORTABLE_PASSWORD)) {
        encryptedString = encrypted.substring(Password.PORTABLE_PASSWORD.length());
    }
    try {
        Input input = new Input(encryptedString);
        input.read();
        SecretKey sessionKey = new SecretKeySpec(input.getSessionKey(), ALG);
        Cipher cipher = Cipher.getInstance(CIPHER);
        if (input.getSessionVector() != null) {
            IvParameterSpec spec = new IvParameterSpec(input.getSessionVector());
            cipher.init(Cipher.DECRYPT_MODE, sessionKey, spec);
        } else {
            cipher.init(Cipher.DECRYPT_MODE, sessionKey);
        }
        byte[] decrypted = cipher.doFinal(input.getEncryptedData());
        result = unseed(decrypted, charset);
    } catch (Exception e) {
        throw new PasswordException(e);
    }
    return result;
}

From source file:club.jmint.crossing.specs.Security.java

public static String desEncrypt(String data, String key) throws CrossException {
    String ret = null;//from   w w w  .  j  a  v  a2 s  . c o m
    try {
        DESKeySpec desKey = new DESKeySpec(key.getBytes("UTF-8"));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
        SecretKey securekey = keyFactory.generateSecret(desKey);

        Cipher cipher = Cipher.getInstance(CIPHER_DES_ALGORITHM);
        SecureRandom random = new SecureRandom();
        cipher.init(Cipher.ENCRYPT_MODE, securekey, random);
        byte[] results = cipher.doFinal(data.getBytes("UTF-8"));
        ret = Base64.encodeBase64String(results);
    } catch (Exception e) {
        CrossLog.printStackTrace(e);
        throw new CrossException(ErrorCode.COMMON_ERR_ENCRYPTION.getCode(),
                ErrorCode.COMMON_ERR_ENCRYPTION.getInfo());
    }
    return ret;
}

From source file:net.bioclipse.encryption.Encrypter.java

public String encrypt(String plaintext) {
    SecretKeyFactory keyFac;//  ww  w  . j  a va2 s.  com
    SecretKey pbeKey;
    Cipher pbeCipher;
    try {
        keyFac = SecretKeyFactory.getInstance(METHOD);
        pbeKey = keyFac.generateSecret(pbeKeySpec);
        pbeCipher = Cipher.getInstance(METHOD);
        pbeCipher.init(Cipher.ENCRYPT_MODE, pbeKey, pbeParamSpec);
        return new String(Base64.encodeBase64(pbeCipher.doFinal(plaintext.getBytes())));
    } catch (NoSuchAlgorithmException e) {
        throw new IllegalStateException(e);
    } catch (InvalidKeySpecException e) {
        throw new IllegalStateException(e);
    } catch (NoSuchPaddingException e) {
        throw new IllegalStateException(e);
    } catch (InvalidKeyException e) {
        throw new IllegalStateException(e);
    } catch (InvalidAlgorithmParameterException e) {
        throw new IllegalStateException(e);
    } catch (IllegalBlockSizeException e) {
        throw new IllegalStateException(e);
    } catch (BadPaddingException e) {
        throw new IllegalStateException(e);
    }
}

From source file:com.blackcrowsys.sinscrypto.AesEncryptor.java

@Override
public String decrypt(String secretkey, String iv, String toDecrypt)
        throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException,
        BadPaddingException, InvalidAlgorithmParameterException, DecoderException {
    Cipher cipher = Cipher.getInstance(AESMODE);
    SecretKeySpec secretKeySpec = new SecretKeySpec(secretkey.getBytes(), AES);
    cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, new IvParameterSpec(Hex.decodeHex(iv.toCharArray())));
    return new String(cipher.doFinal(Base64.decodeBase64(toDecrypt)));
}

From source file:com.amazonaws.cognito.devauthsample.AESEncryption.java

private static byte[] decrypt(byte[] cipherBytes, String key, byte[] iv) {
    try {//from ww  w.j a  v a2s .co m
        Cipher cipher = Cipher.getInstance(ENCRYPTION_ALGORITHM);
        AlgorithmParameters params = AlgorithmParameters.getInstance("AES");
        params.init(new IvParameterSpec(iv));
        cipher.init(Cipher.DECRYPT_MODE, getKey(key), params);
        return cipher.doFinal(cipherBytes);
    } catch (GeneralSecurityException e) {
        throw new RuntimeException("Failed to decrypt.", e);
    }
}

From source file:com.vmware.fdmsecprotomgmt.PasswdEncrypter.java

/**
 * Decrypt the encrypted value with provided key
 *//*from   w w  w  .  j  a v a2 s . c o  m*/
public static String decrypt(String key, String encryptedValue) {
    String decryptedString = null;
    try {
        IvParameterSpec iv = new IvParameterSpec(INIT_VECTOR.getBytes("UTF-8"));
        SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");

        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);

        decryptedString = new String(cipher.doFinal(Base64.decodeBase64(encryptedValue)));

    } catch (Exception ex) {
        System.out.println("Caught exception while decrypting string");
        ex.printStackTrace();
    }

    return decryptedString;
}

From source file:corner.util.crypto.Cryptor.java

/**
 * IO?,IO??,./*from  w w  w .j  a  v  a 2 s. c  o m*/
 * @param outFileName ??. 
 * @param keyFile ??.
 * @return ??.
 */
public static OutputStream encryptFileIO(String outFileName, String keyFile) {
    if (keyFile == null) {
        try {
            return new FileOutputStream(outFileName);
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        }
    }
    SecretKey key = null;

    //?
    ObjectInputStream keyis;
    try {
        keyis = new ObjectInputStream(new FileInputStream(keyFile));
        key = (SecretKey) keyis.readObject();
        keyis.close();
    } catch (FileNotFoundException e) {
        log.error("file not found!", e);
        throw new RuntimeException("file not found", e);
    } catch (IOException e) {
        log.error("io occour exception", e);
        throw new RuntimeException(e);
    } catch (ClassNotFoundException e) {
        log.error("Class Not Found  exception", e);
        throw new RuntimeException(e);
    }

    //keyCipher
    Cipher cipher = null;
    //?Cipher?

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

        cipher.init(Cipher.ENCRYPT_MODE, key);
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    } catch (NoSuchPaddingException e) {
        throw new RuntimeException(e);
    } catch (InvalidKeyException e) {
        throw new RuntimeException(e);
    }

    //???

    //
    CipherOutputStream out = null;
    try {
        out = new CipherOutputStream(new BufferedOutputStream(new FileOutputStream(outFileName)), cipher);
    } catch (FileNotFoundException e) {
        throw new RuntimeException(e);
    }

    return out;

}

From source file:com.charandeepmatta.oracle.sqldeveloper.DecodePasswordHash.java

private byte[] decryptPassword(final byte[] result) throws GeneralSecurityException {
    byte constant = result[0];
    if (constant != (byte) 5) {
        throw new IllegalArgumentException();
    }//from w w w.jav a 2  s  . co m
    byte[] secretKey = new byte[8];
    System.arraycopy(result, 1, secretKey, 0, 8);
    byte[] encryptedPassword = new byte[result.length - 9];
    System.arraycopy(result, 9, encryptedPassword, 0, encryptedPassword.length);
    byte[] iv = new byte[8];
    for (int i = 0; i < iv.length; i++) {
        iv[i] = 0;
    }
    Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
    cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(secretKey, "DES"), new IvParameterSpec(iv));
    return cipher.doFinal(encryptedPassword);
}