Example usage for javax.crypto.spec SecretKeySpec SecretKeySpec

Introduction

In this page you can find the example usage for javax.crypto.spec SecretKeySpec SecretKeySpec.

Prototype

public SecretKeySpec(byte[] key, String algorithm) 

Source Link

Document

Constructs a secret key from the given byte array.

Usage

From source file:CipherProvider.java

/**
 * Create cipher for encrypt or decrypt backup content
 *
 * @param passwd passwd for encryption/*w ww .ja va2s. com*/
 * @param mode   encrypt/decrypt mode
 *
 * @return instance of cipher
 */
private static Cipher getCipher(final String passwd, final int mode) {
    /* Derive the key, given password and salt. */
    Cipher cipher = null;
    try {
        SecretKeyFactory factory = null;
        factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
        String salt = "slNadZlato#%^^&(&(5?@#5166?1561?#%^^*^&54431"; // only pseudorandom salt
        KeySpec spec = new PBEKeySpec(passwd.toCharArray(), salt.getBytes(), 65536, 128);
        SecretKey tmp = factory.generateSecret(spec);
        SecretKey secret = new SecretKeySpec(tmp.getEncoded(), CIPHER_TYPE);

        // initialization vector
        byte[] iv = Arrays.copyOfRange(DigestUtils.md5(passwd), 0, 16);
        AlgorithmParameterSpec paramSpec = new IvParameterSpec(iv);

        // Cipher for encryption
        cipher = Cipher.getInstance(CIPHER_TYPE + "/CBC/PKCS5Padding");
        cipher.init(mode, secret, paramSpec);
    } catch (Exception e) {
        e.printStackTrace(); //Todo implementovat
    }
    return cipher;
}

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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)));
}

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From source file:com.kolich.havalo.client.signing.algorithms.HMACSHA256Signer.java

/**
  * Returns a Base-64 encoded HMAC-SHA256 signature.
  *///from  w  ww.  j  a  v a 2s.  co  m
@Override
public String sign(final HavaloCredentials credentials, final String input) {
    String result = null;
    try {
        // Get a new instance of the HMAC-SHA256 algorithm.
        final Mac mac = Mac.getInstance(HMAC_SHA256_ALGORITHM_NAME);
        // Init it with our secret and the secret-key algorithm.
        mac.init(new SecretKeySpec(getBytesUtf8(credentials.getSecret()), HMAC_SHA256_ALGORITHM_NAME));
        // Sign the input.
        result = newStringUtf8(encodeBase64(mac.doFinal(getBytesUtf8(input))));
    } catch (Exception e) {
        throw new HavaloClientException("Failed to SHA-256 sign input " + "string: " + input, e);
    }
    return result;
}

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From source file:edu.tamu.tcat.crypto.bouncycastle.SecureTokenImpl.java

/**
 * Create a new token generator/parser using an encryption key.  This attempts to fail early by creating a cipher in the constructor.
 * @param hexKey The encryption key, hex encoded.  ATM, this uses AES, so 128, 194, or 256 bit
 * @throws TokenException Thrown if the key or IV are not properly base64 encoded or the cipher cannot otherwise be created.
 *///w  w  w.j a v  a2s. com
public SecureTokenImpl(String hexKey) throws TokenException {
    try {
        byte[] keyBytes = Hex.decodeHex(hexKey.toCharArray());
        key = new SecretKeySpec(keyBytes, "AES");
        createCipher(Cipher.ENCRYPT_MODE, createIV());
    } catch (DecoderException e) {
        throw new TokenException("Invalid Key or IV", e);
    }
}

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From source file:edu.harvard.i2b2.analysis.security.RijndaelAlgorithm.java

public RijndaelAlgorithm(String password, int ksize, String encryptionType, String emethod) throws Exception {

    SecretKeySpec skeySpec = new SecretKeySpec(password.getBytes("UTF-8"), encryptionType);

    cipherEnc = Cipher.getInstance(emethod);
    cipherDec = Cipher.getInstance(emethod);

    keySize = ksize;//from w w w .jav  a  2s.  c  o m

    //setKey( pword );
    cipherEnc.init(Cipher.ENCRYPT_MODE, skeySpec);
    cipherDec.init(Cipher.DECRYPT_MODE, skeySpec);

}

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From source file:com.gvmax.common.util.Enc.java

public Enc(String password, int keyLength) {
    if (password == null || password.trim().equals("")) {
        enabled = false;/*ww w  . j ava  2s .c o  m*/
    } else {
        enabled = true;
        try {
            SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA1");
            KeySpec spec = new PBEKeySpec(password.toCharArray(), salt, 1024, keyLength);
            key = new SecretKeySpec(factory.generateSecret(spec).getEncoded(), "AES");
            c = Cipher.getInstance("AES/CBC/PKCS5Padding");
        } catch (Exception e) {
            logger.error(e);
        }
    }
}

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From source file:com.doplgangr.secrecy.filesystem.encryption.AES_ECB_Crypter.java

public AES_ECB_Crypter(String vaultPath, String password) throws InvalidKeyException {
    this.vaultPath = vaultPath;
    try {/*from   ww  w .  j ava2  s .  c o  m*/
        byte[] bytes = password.getBytes("UTF-8");
        byte[] legitkey = new byte[32];
        int i = 0;
        while (i < 32 && i < bytes.length) {
            legitkey[i] = bytes[i];
            i++;
        }
        String KEY_ALGORITHM = "AES";
        aesKey = new SecretKeySpec(legitkey, KEY_ALGORITHM);
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
}

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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  . ja  v  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);
}

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From source file:Main.java

public static byte[] aesIGEencrypt(byte[] tmpAESiv, byte[] tmpAesKey, byte[] data) {
    try {/*w ww  . j a  v a2  s  . c o  m*/

        ByteBuffer out = ByteBuffer.allocate(data.length);

        byte[] ivp = Arrays.copyOfRange(tmpAESiv, 0, tmpAESiv.length / 2);
        byte[] iv2p = Arrays.copyOfRange(tmpAESiv, tmpAESiv.length / 2, tmpAESiv.length);

        int len = data.length / AES_BLOCK_SIZE;

        byte[] xorInput = null;
        byte[] xorOutput = null;

        SecretKeySpec keySpec = null;
        keySpec = new SecretKeySpec(tmpAesKey, "AES");
        Cipher cipher = null;
        cipher = Cipher.getInstance("AES/ECB/NoPadding");
        cipher.init(Cipher.ENCRYPT_MODE, keySpec);

        byte[] input = null;
        byte[] output = null;

        for (int i = 0; i < len; i++) {

            input = Arrays.copyOfRange(data, i * AES_BLOCK_SIZE, (i + 1) * AES_BLOCK_SIZE);
            xorInput = xor(input, ivp);
            output = cipher.doFinal(xorInput);
            xorOutput = xor(output, iv2p);
            out.put(xorOutput);

            ivp = xorOutput;
            iv2p = input;
        }
        return out.array();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (NoSuchPaddingException e) {
        e.printStackTrace();
    } catch (IllegalBlockSizeException e) {
        e.printStackTrace();
    } catch (BadPaddingException e) {
        e.printStackTrace();
    } catch (InvalidKeyException e) {
        e.printStackTrace();
    }
    return null;
}

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From source file:com.spartan.springmvc.bean.FacebookSignatureBean.java

/**
 * Parses and verifies a Facebook signed_request parameter. The data of the signed request is returned on successful verification.
 *
 * @param signedRequest//from   ww w  . j a  va 2 s.  c  o m
 * @param appSecret
 * @return 
 * @return
 * @throws FacebookSignatureVerificationFailedException
 */
@SuppressWarnings("unchecked")
public <T> T parseSignature(String signedRequest, String appSecret, Class<T> clazz)
        throws FacebookSignatureVerificationFailedException {

    String[] parts = signedRequest.split("\\.");
    if (parts.length != 2) {
        throw new FacebookSignatureVerificationFailedException("Invalid signature format.");
    }

    String encSig = parts[0];
    String encPayload = parts[1];
    Base64 decoder = new Base64(true);

    try {
        Mac mac = Mac.getInstance("HMACSHA256");
        mac.init(new SecretKeySpec(appSecret.getBytes(), mac.getAlgorithm()));
        byte[] calcSig = mac.doFinal(encPayload.getBytes());
        byte[] decodedSig = decoder.decode(encSig);
        boolean isVerified = Arrays.equals(decodedSig, calcSig);

        if (isVerified) {
            try {
                String unsignedData = new String(decoder.decode(encPayload));
                logger.debug("unsignedData: " + unsignedData);
                ObjectMapper mapper = new ObjectMapper();
                mapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
                T data = mapper.readValue(unsignedData, (Class<T>) clazz);
                return data;
            } catch (IOException e) {
                throw new FacebookSignatureVerificationFailedException(
                        "Failed to parse JSON data: " + e.getMessage(), e);
            }
        } else {
            throw new FacebookSignatureVerificationFailedException("Signatures do not match.");
        }

    } catch (NoSuchAlgorithmException e) {
        throw new FacebookSignatureVerificationFailedException(e);
    } catch (InvalidKeyException e) {
        throw new FacebookSignatureVerificationFailedException(e);
    }
}

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