Example usage for javax.crypto SecretKeyFactory getInstance

Introduction

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

Prototype

public static final SecretKeyFactory getInstance(String algorithm, Provider provider)
        throws NoSuchAlgorithmException 

Source Link

Document

Returns a SecretKeyFactory object that converts secret keys of the specified algorithm.

Usage

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
    byte[] input = "www.java2s.com".getBytes();
    byte[] keyBytes = new byte[] { 0x73, 0x2f, 0x2d, 0x33, (byte) 0xc8, 0x01, 0x73, 0x2b, 0x72, 0x06, 0x75,
            0x6c, (byte) 0xbd, 0x44, (byte) 0xf9, (byte) 0xc1, (byte) 0xc1, 0x03, (byte) 0xdd, (byte) 0xd9,
            0x7c, 0x7c, (byte) 0xbe, (byte) 0x8e };
    byte[] ivBytes = new byte[] { (byte) 0xb0, 0x7b, (byte) 0xf5, 0x22, (byte) 0xc8, (byte) 0xd6, 0x08,
            (byte) 0xb8 };

    // encrypt the data using precalculated keys

    Cipher cEnc = Cipher.getInstance("DESede/CBC/PKCS7Padding", "BC");

    cEnc.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(keyBytes, "DESede"), new IvParameterSpec(ivBytes));

    byte[] out = cEnc.doFinal(input);

    // decrypt the data using PBE

    char[] password = "password".toCharArray();
    byte[] salt = new byte[] { 0x7d, 0x60, 0x43, 0x5f, 0x02, (byte) 0xe9, (byte) 0xe0, (byte) 0xae };
    int iterationCount = 2048;
    PBEKeySpec pbeSpec = new PBEKeySpec(password);
    SecretKeyFactory keyFact = SecretKeyFactory.getInstance("PBEWithSHAAnd3KeyTripleDES", "BC");

    Cipher cDec = Cipher.getInstance("PBEWithSHAAnd3KeyTripleDES", "BC");
    Key sKey = keyFact.generateSecret(pbeSpec);

    cDec.init(Cipher.DECRYPT_MODE, sKey, new PBEParameterSpec(salt, iterationCount));

    System.out.println("cipher : " + new String(out));
    System.out.println("gen key: " + new String(sKey.getEncoded()));
    System.out.println("gen iv : " + new String(cDec.getIV()));
    System.out.println("plain  : " + new String(cDec.doFinal(out)));
}

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From source file:com.aspose.showcase.qrcodegen.web.api.util.StringEncryptor.java

public static String encrypt(String data, String password) throws Exception {

    Security.addProvider(new BouncyCastleProvider());
    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding", "BC");

    final Random r = new SecureRandom();
    byte[] salt = new byte[SALT_SIZE];
    r.nextBytes(salt);//from w  w  w  . j ava 2 s . com

    SecretKeyFactory fact = SecretKeyFactory.getInstance("PBEWITHMD5AND128BITAES-CBC-OPENSSL", "BC");

    cipher.init(Cipher.ENCRYPT_MODE,
            fact.generateSecret(new PBEKeySpec(password.toCharArray(), salt, PBE_KEY_SALE_SIZE)));

    byte[] encVal = cipher.doFinal(data.getBytes());

    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    // writing encrypted data along with the salt in the format readable by
    // open ssl api
    bos.write("Salted__".getBytes());
    bos.write(salt);
    bos.write(encVal);
    String encryptedValue = new String(Base64.encode(bos.toByteArray()));
    bos.close();

    return encryptedValue;

}

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From source file:com.aspose.showcase.qrcodegen.web.api.util.StringEncryptor.java

public static String decrypt(String encryptedData, String password) throws Exception {

    Security.addProvider(new BouncyCastleProvider());

    byte[] encrypted = Base64.decode(encryptedData);

    Cipher cipher0 = Cipher.getInstance("AES/CBC/PKCS5Padding", "BC");

    // Openssl puts SALTED__ then the 8 byte salt at the start of the file.
    // We simply copy it out.
    byte[] salt = new byte[SALT_SIZE];
    System.arraycopy(encrypted, SALT_SIZE, salt, 0, SALT_SIZE);

    SecretKeyFactory fact = SecretKeyFactory.getInstance("PBEWITHMD5AND128BITAES-CBC-OPENSSL", "BC");
    cipher0.init(Cipher.DECRYPT_MODE,
            fact.generateSecret(new PBEKeySpec(password.toCharArray(), salt, PBE_KEY_SALE_SIZE)));

    // Decrypt the rest of the byte array (after stripping off the salt)
    byte[] decValue = cipher0.doFinal(encrypted, SALT_STRIP_LENGTH, encrypted.length - SALT_STRIP_LENGTH);

    return new String(decValue);
}

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From source file:com.sirius.utils.encrypt.DESEncryptor.java

private Key getKey(Object key) throws Exception {
    if (key instanceof String) {
        DESKeySpec dks = new DESKeySpec(((String) key).getBytes());
        SecretKeyFactory skf = SecretKeyFactory.getInstance(ALGORITHM, security_provider);
        return skf.generateSecret(dks);
    } else {/*from  ww w.  ja v a  2 s .  c om*/
        throw new EncryptException("Invilid key.");
    }
}

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From source file:com.the_incognito.darry.incognitochatmessengertest.BouncyCastleImplementation.java

private static Key generateKeySpec(String key) throws NoSuchAlgorithmException, InvalidKeySpecException {
    SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256", new BouncyCastleProvider());
    char password[] = key.toCharArray();
    byte salt[] = "salt".getBytes();
    KeySpec spec = new PBEKeySpec(password, salt, 65536, 128);
    SecretKey tmp = factory.generateSecret(spec);
    SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "AES");
    return secret;
    //To change body of generated methods, choose Tools | Templates.
}

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From source file:com.the_incognito.darry.incognitochatmessengertest.BouncyCastleImplementation.java

public static String hmacSha256(String key, String value) {
    try {//from w w w  . ja va 2 s  . co  m
        //System.out.println(Base64.getEncoder().encodeToString(keyBytes));
        // Get an hmac_sha256 key from the raw key bytes
        System.out.println("First HMAC on = " + value);
        SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256",
                new BouncyCastleProvider());
        char password[] = key.toCharArray();
        byte salt[] = "salt".getBytes();
        KeySpec spec = new PBEKeySpec(password, salt, 65536, 256);
        SecretKey tmp = factory.generateSecret(spec);
        SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "HmacSHA256");

        // Get an hmac_sha256 Mac instance and initialize with the signing key
        Mac mac = Mac.getInstance("HmacSHA256", new BouncyCastleProvider());
        mac.init(secret);

        // Compute the hmac on input data bytes
        byte[] rawHmac = mac.doFinal(value.getBytes());

        // Convert raw bytes to Hex
        byte[] hexBytes = new Hex().encode(rawHmac);
        //  Covert array of Hex bytes to a String
        return new String(hexBytes, "UTF-8");
    } catch (Exception e) {
        throw new RuntimeException(e);
    }

}

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From source file:org.apache.nifi.processors.standard.util.PasswordBasedEncryptor.java

public PasswordBasedEncryptor(final String algorithm, final String providerName, final char[] password,
        KeyDerivationFunction kdf) {//from w  ww .  j  a  v a  2 s.co m
    super();
    try {
        // initialize cipher
        this.cipher = Cipher.getInstance(algorithm, providerName);
        this.kdf = kdf;

        if (isOpenSSLKDF()) {
            this.saltSize = OPENSSL_EVP_SALT_SIZE;
            this.iterationsCount = OPENSSL_EVP_KDF_ITERATIONS;
        } else {
            int algorithmBlockSize = cipher.getBlockSize();
            this.saltSize = (algorithmBlockSize > 0) ? algorithmBlockSize : DEFAULT_SALT_SIZE;
        }

        // initialize SecretKey from password
        final PBEKeySpec pbeKeySpec = new PBEKeySpec(password);
        final SecretKeyFactory factory = SecretKeyFactory.getInstance(algorithm, providerName);
        this.secretKey = factory.generateSecret(pbeKeySpec);
    } catch (Exception e) {
        throw new ProcessException(e);
    }
}

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From source file:edu.vt.middleware.crypt.CryptProvider.java

/**
 * <p>This finds a <code>SecretKeyFactory</code> using the known providers and
 * the supplied algorithm parameter.</p>
 *
 * @param  algorithm  <code>String</code> name
 *
 * @return  <code>SecretKeyFactory</code>
 *
 * @throws  CryptException  if the algorithm is not available from any
 * provider or if the provider is not available in the environment
 *//*from   w  w w  . j a  va 2 s.  co m*/
public static SecretKeyFactory getSecretKeyFactory(final String algorithm) throws CryptException {
    final Log logger = LogFactory.getLog(CryptProvider.class);
    SecretKeyFactory kf = null;
    for (int i = 0; i < providers.length; i++) {
        try {
            kf = SecretKeyFactory.getInstance(algorithm, providers[i]);
        } catch (NoSuchAlgorithmException e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Could not find algorithm " + algorithm + " in " + providers[i]);
            }
        } catch (NoSuchProviderException e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Could not find provider " + providers[i]);
            }
        } finally {
            if (kf != null) {
                break;
            }
        }
    }
    if (kf == null) {
        try {
            kf = SecretKeyFactory.getInstance(algorithm);
        } catch (NoSuchAlgorithmException e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Could not find algorithm " + algorithm);
            }
            throw new CryptException(e.getMessage());
        }
    }
    return kf;
}

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From source file:com.the_incognito.darry.incognitochatmessengertest.BouncyCastleImplementation.java

public static boolean isValid(String plainText, String HMAC, String key) {
    try {/* w ww. j  a  v a 2 s .co  m*/
        System.out.println("HMAC on = " + plainText);
        SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256",
                new BouncyCastleProvider());
        char password[] = key.toCharArray();
        byte salt[] = "salt".getBytes();
        KeySpec spec = new PBEKeySpec(password, salt, 65536, 256);
        SecretKey tmp = factory.generateSecret(spec);
        SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "HmacSHA256");
        // Get an hmac_sha1 Mac instance and initialize with the signing key
        Mac mac = Mac.getInstance("HmacSHA256", new BouncyCastleProvider());
        mac.init(secret);
        // Compute the hmac on input data bytes
        byte[] rawHmac = mac.doFinal(plainText.getBytes());
        // Convert raw bytes to Hex
        byte[] hexBytes = new Hex().encode(rawHmac);

        //  Covert array of Hex bytes to a String
        String check = new String(hexBytes, "UTF-8");
        System.out.println("Checking = " + check);
        return check.equals(HMAC);
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

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From source file:org.openintents.safe.CryptoHelper.java

/**
 * Initialize the class.  Sets the encryption level for the instance
 * and generates the secret key factory.
 *
 * @param Strength/*from ww  w  . java 2s .  c  o  m*/
 */
private void initialize(int Strength) {
    switch (Strength) {
    case EncryptionMedium:
        algorithm = algorithmMedium;
        break;
    case EncryptionStrong:
        algorithm = algorithmStrong;
        break;
    }
    pbeParamSpec = new PBEParameterSpec(salt, count);
    try {
        keyFac = SecretKeyFactory.getInstance(algorithm, "BC");
    } catch (NoSuchAlgorithmException e) {
        Log.e(TAG, "CryptoHelper(): " + e.toString());
    } catch (NoSuchProviderException e) {
        Log.e(TAG, "CryptoHelper(): " + e.toString());
    }
}

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