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:com.healthcit.cacure.utils.PasswordService.java

private static byte[] getRawKey(byte[] seed) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
    sr.setSeed(seed);/*from w w  w. j a  v  a  2  s  . c o  m*/
    kgen.init(128, sr); // 192 and 256 bits may not be available   
    SecretKey skey = kgen.generateKey();
    byte[] raw = skey.getEncoded();
    return raw;
}

From source file:com.keybox.manage.util.KeyStoreUtil.java

/**
 * create new keystore//  w ww  . j av a  2s .  c  o m
 */
private static void initializeKeyStore() {
    try {
        keyStore = KeyStore.getInstance("JCEKS");
        //create keystore
        keyStore.load(null, KEYSTORE_PASS);

        //set encryption key
        KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
        keyGenerator.init(128);
        KeyStoreUtil.setSecret(KeyStoreUtil.ENCRYPTION_KEY_ALIAS, keyGenerator.generateKey().getEncoded());

        //write keystore
        FileOutputStream fos = new FileOutputStream(keyStoreFile);
        keyStore.store(fos, KEYSTORE_PASS);
        fos.close();
    } catch (Exception ex) {
        log.error(ex.toString(), ex);
    }
}

From source file:org.silverpeas.core.security.encryption.ContentEncryptionServiceTest.java

/**
 * Generates a key for an AES enciphering.
 * @return the key in hexadecimal.//from  ww w  . j ava 2 s  . co m
 * @throws Exception if the key cannot be generated.
 */
public static String generateAESKey() throws Exception {
    KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
    keyGenerator.init(256);
    SecretKey skey = keyGenerator.generateKey();
    return EncodingUtil.asHex(skey.getEncoded());
}

From source file:org.sakaiproject.linktool.LinkToolUtil.java

/**
 * Generate a random salt, and write it to a file
 * // w w w .  ja v  a 2s  .c o m
 * @param dirname
 *        writes to file saltname in this 
 *        directory. dirname assumed to end in /
 */

private static void gensalt(String dirname) {
    try {
        // Generate a key for the HMAC-SHA1 keyed-hashing algorithm
        KeyGenerator keyGen = KeyGenerator.getInstance("HmacSHA1");
        SecretKey key = keyGen.generateKey();
        writeKey(key, dirname + saltname);
    } catch (Exception e) {
        M_log.warn("Error generating salt", e);
    }
}

From source file:Main.java

private static byte[] getRawKey(byte[] seed) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    //  SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");
    sr.setSeed(seed);/*from w w  w . j a va  2  s .  c o  m*/
    kgen.init(128, sr); // 192 and 256 bits may not be available
    SecretKey skey = kgen.generateKey();
    byte[] raw = skey.getEncoded();
    return raw;
}

From source file:com.joyent.manta.client.crypto.SecretKeyUtils.java

/**
 * Generates a new symmetric key using the specified cipher.
 *
 * @param algorithm cipher to generate key for
 * @param bits number of bits of key//from  www  .  ja v  a 2 s  .  c o  m
 * @return new instance of key
 * @throws NoSuchAlgorithmException thrown when no cipher is available by the passed name
 */
public static SecretKey generate(final String algorithm, final int bits) throws NoSuchAlgorithmException {
    Validate.notNull(algorithm, "Cipher must not be null");
    Validate.isTrue(bits > 0, "Cipher bits must be greater than zero");

    KeyGenerator symKeyGenerator = KeyGenerator.getInstance(algorithm,
            ExternalSecurityProviderLoader.getPreferredProvider());
    symKeyGenerator.init(bits);
    return symKeyGenerator.generateKey();
}

From source file:com.bluepixel.security.manager.ServerClient_test.java

private static SecretKey getSecretKey() throws NoSuchAlgorithmException {
    KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
    keyGenerator.init(128);// w w w .  j  av  a2 s  .c  o m
    SecretKey key = keyGenerator.generateKey();
    return key;
}

From source file:org.bigmouth.nvwa.utils.degist.NativeAesUtils.java

public static String encryptAES(byte[] input, String key) throws Exception {
    byte[] crypted = null;
    javax.crypto.KeyGenerator kgen = javax.crypto.KeyGenerator.getInstance("AES");
    SecureRandom secureRandom = SecureRandom.getInstance("SHA1PRNG");
    secureRandom.setSeed(key.getBytes());
    kgen.init(128, secureRandom);//from   ww w.  j  a  v a2s  . c o m
    SecretKey secretKey = kgen.generateKey();
    byte[] enCodeFormat = secretKey.getEncoded();
    SecretKeySpec skey = new SecretKeySpec(enCodeFormat, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.ENCRYPT_MODE, skey);
    crypted = cipher.doFinal(input);
    return new String(Hex.encode(crypted));
}

From source file:pepperim.util.IMCrypt.java

/**
 * Generates a random string to be used as AES encryption key
 * @return random AES encryption key//w w  w .ja  v a 2s.co m
 */
public static String AES_genKey() {
    try {
        KeyGenerator kgen = KeyGenerator.getInstance("AES");

        kgen.init(128);
        SecretKey skey = kgen.generateKey();
        byte[] raw = skey.getEncoded();

        return binToHex(raw);

    } catch (NoSuchAlgorithmException e) {
        Main.log(e.getMessage());
        return "";
    }
}

From source file:Main.java

private static byte[] getRawKey(byte[] seed) throws Exception {
    KeyGenerator kGen = KeyGenerator.getInstance("AES");
    SecureRandom sr;//  ww  w .  j  av a2s.c  o m
    if (android.os.Build.VERSION.SDK_INT >= 17) {
        sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");
    } else {
        sr = SecureRandom.getInstance("SHA1PRNG");
    }
    sr.setSeed(seed);
    kGen.init(128, sr);
    SecretKey sKey = kGen.generateKey();
    return sKey.getEncoded();
}