Example usage for javax.crypto KeyGenerator generateKey

Introduction

In this page you can find the example usage for javax.crypto KeyGenerator generateKey.

Prototype

public final SecretKey generateKey()

Source Link

Document

Generates a secret key.

Usage

From source file:cl.niclabs.tscrypto.common.messages.EncryptedData.java

private static SecretKeySpec generateAESKey() {
    SecretKeySpec skeySpec = null;
    try {/*from   www.j  a va  2  s  . c  om*/
        KeyGenerator keyGen = KeyGenerator.getInstance("AES");
        keyGen.init(KEYSIZE_AES);

        // Generate the secret key specs.
        SecretKey secretKey = keyGen.generateKey();

        skeySpec = new SecretKeySpec(secretKey.getEncoded(), "AES");
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    }

    return skeySpec;
}

From source file:com.liferay.util.Encryptor.java

public static Key generateKey(String algorithm) throws EncryptorException {
    try {/* w w w . j a v  a  2s  . c o  m*/
        Security.addProvider(getProvider());

        KeyGenerator generator = KeyGenerator.getInstance(algorithm);
        generator.init(56, new SecureRandom());

        Key key = generator.generateKey();

        return key;
    } catch (Exception e) {
        throw new EncryptorException(e);
    }
}

From source file:org.apache.juddi.webconsole.AES.java

/**
 * generates an AES based off of the selected key size
 *
 * @param keysize/* w ww .j  av a 2  s .c  o m*/
 * @return may return null if the key is not of a supported size by the
 * current jdk
 */
public static String GEN(int keysize) {
    KeyGenerator kgen;
    try {
        kgen = KeyGenerator.getInstance("AES");
        kgen.init(keysize);
        SecretKey skey = kgen.generateKey();
        byte[] raw = skey.getEncoded();
        return Base64.encodeBase64String(raw);
    } catch (Exception ex) {
        log.fatal("error generating key", ex);
    }
    return null;
}

From source file:org.apache.juddi.adminconsole.AES.java

/**
 * generates an AES based off of the selected key size
 *
 * @param keysize/*from  w  w  w  .  java  2 s .c  o  m*/
 * @return may return null if the key is not of a supported size by the
 * current jdk
 */
public static String GEN(int keysize) {
    KeyGenerator kgen;
    try {
        kgen = KeyGenerator.getInstance("AES");
        kgen.init(keysize);
        SecretKey skey = kgen.generateKey();
        byte[] raw = skey.getEncoded();
        return new String(Base64.encodeBase64(raw), Charset.defaultCharset());
    } catch (Exception ex) {
        log.fatal("error generating key", ex);
    }
    return null;
}

From source file:org.kuali.rice.core.impl.encryption.DemonstrationGradeEncryptionServiceImpl.java

/**
 * //from   w w  w  .  j  a  v  a 2s.c o m
 * This method generates keys. This method is implementation specific and should not be present in any general purpose interface
 * extracted from this class.
 * 
 * @return
 * @throws Exception
 */
public static String generateEncodedKey() throws Exception {
    KeyGenerator keygen = KeyGenerator.getInstance("DES");
    SecretKey desKey = keygen.generateKey();

    // Create the cipher
    Cipher cipher = Cipher.getInstance(ALGORITHM);
    cipher.init((Cipher.WRAP_MODE), desKey);

    SecretKeyFactory desFactory = SecretKeyFactory.getInstance("DES");
    DESKeySpec desSpec = (DESKeySpec) desFactory.getKeySpec(desKey, javax.crypto.spec.DESKeySpec.class);
    byte[] rawDesKey = desSpec.getKey();

    return new String(Base64.encodeBase64(rawDesKey));
}

From source file:org.javaweb.utils.EncryptUtils.java

/**
 * ?AES /*from   w w  w.j  av  a 2s . c o  m*/
 *
 * @param length
 * @return
 * @throws NoSuchAlgorithmException
 */
public static String getAESKey(int length) throws NoSuchAlgorithmException {
    KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
    keyGenerator.init(length);
    SecretKey secretKey = keyGenerator.generateKey();

    return HexUtils.bytes2HexString(secretKey.getEncoded());
}

From source file:com.miyue.util.Cryptos.java

/**
 * ?HMAC-SHA1,,160?(20)./* www  . ja va  2  s .  c o  m*/
 * HMAC-SHA1?, RFC2401160?(20).
 */
public static byte[] generateHmacSha1Key() {
    try {
        KeyGenerator keyGenerator = KeyGenerator.getInstance(HMACSHA1);
        keyGenerator.init(DEFAULT_HMACSHA1_KEYSIZE);
        SecretKey secretKey = keyGenerator.generateKey();
        return secretKey.getEncoded();
    } catch (GeneralSecurityException e) {
        throw Exceptions.unchecked(e);
    }
}

From source file:io.manasobi.utils.CryptoUtils.java

/**
 * ?   ?. ??  ?  ??  ?  ?.//from ww  w. j  a  va2  s .  c o  m
 *
 * @return ?? ??  Hex ?  
 */
public static String generateHexDESKey() {

    byte[] rawKey = null;

    try {

        KeyGenerator keyGenerator = KeyGenerator.getInstance(ALGORITHM);

        SecretKey secretKey = keyGenerator.generateKey();

        SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance(ALGORITHM);

        DESedeKeySpec desEdeSpec = (DESedeKeySpec) secretKeyFactory.getKeySpec(secretKey,
                javax.crypto.spec.DESedeKeySpec.class);

        rawKey = desEdeSpec.getKey();

    } catch (Exception e) {

        throw new CryptoUtilsException(e.getMessage());
    }

    return new String(Hex.encodeHex(rawKey));
}

From source file:com.credomatic.gprod.db2query2csv.Security.java

/**
 * Cifra una cadena de carateres utilizando el algoritmo AES y una llave (128, 256, o 512 bits). 
 * @param KeySize tamao de la llave autogenerada para relizar el cifrado
 * @param value cadena de caracteres que sera cifrada
 * @return instancia de tipo ${@link SecurityParams} con el resultado del proceso de cifrado
 *//* w ww .j  a  va2 s . c o m*/
public static SecurityParams encrypt(int KeySize, String value) {

    SecurityParams result = null;
    try {
        // Get the KeyGenerator
        final KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(KeySize);

        // Generate the secret key specs.
        final SecretKey skey = kgen.generateKey();
        final byte[] raw = skey.getEncoded();
        final SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
        final Cipher cipher = Cipher.getInstance("AES");

        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
        final String key = new Base64().encodeAsString(raw);
        final String encrypt = (new Base64()).encodeAsString(cipher.doFinal(value.getBytes()));

        result = new SecurityParams(encrypt, key, KeySize);

    } catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | IllegalBlockSizeException
            | BadPaddingException ex) {
        Logger.getLogger(Security.class.getName()).log(Level.SEVERE, null, ex);
    }
    return result;
}

From source file:com.qubit.solution.fenixedu.bennu.webservices.services.client.WebServiceClientHandler.java

private static byte[] generateAESKey() throws NoSuchAlgorithmException {
    KeyGenerator generator;
    try {//www.  j  a  v a  2 s.c om
        generator = KeyGenerator.getInstance("AES");
        generator.init(128);
        return generator.generateKey().getEncoded();
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    }
}