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:Main.java

public static String encryption(String string) throws Exception {
    // TODO Auto-generated method stub

    //generate symmetric key
    KeyGenerator keygt = KeyGenerator.getInstance("AES");
    keygt.init(128);/*from ww  w. java2s . com*/
    SecretKey symkey = keygt.generateKey();

    //get it encoded
    byte[] aes_ba = symkey.getEncoded();

    //create cipher
    SecretKeySpec skeySpec = new SecretKeySpec(aes_ba, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec);

    //encryption
    byte[] EncSymbyteArray = cipher.doFinal(string.getBytes());

    //encrypt symKey with PublicKey
    //        Key pubKey = getPublicKey();

    Key pubKey = publicKey;

    //RSA cipher
    Cipher cipherAsm = Cipher.getInstance("RSA", "BC");
    cipherAsm.init(Cipher.ENCRYPT_MODE, pubKey);

    //RSA encryption
    byte[] asymEncsymKey = cipherAsm.doFinal(aes_ba);

    //           File f3 = new File(BASE_PATH,"enc.txt");
    //           File f3key = new File(BASE_PATH,"enckey.txt");
    //           File f3file = new File(BASE_PATH,"encfile.txt");
    //           writeToFile2(f3,f3key,f3file, asymEncsymKey, EncSymbyteArray);

    //byte != new String
    //return new String(byteMerger(asymEncsymKey, EncSymbyteArray));
    return Base64.encodeToString(byteMerger(asymEncsymKey, EncSymbyteArray), Base64.DEFAULT);

}

From source file:org.vosao.utils.CipherUtils.java

public static String generateKey() {
    try {//  w  w  w . jav a2 s .  co m
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        return new Base64().encodeToString(kgen.generateKey().getEncoded());
    } catch (NoSuchAlgorithmException e) {
        logger.error("Error generating secret key", e);
        return "";
    }
}

From source file:Main.java

private static Key getKey(Context mContext) {
    if (key == null) {
        try {//from ww w.  jav  a 2s.co m
            KeyGenerator _generator = KeyGenerator.getInstance("DES");
            _generator.init(new SecureRandom(mContext.getPackageName().getBytes()));
            key = _generator.generateKey();
            _generator = null;
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    return key;
}

From source file:Main.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 2s  .  c  o m
    kgen.init(128, sr);
    SecretKey sKey = kgen.generateKey();
    byte[] raw = sKey.getEncoded();

    return raw;
}

From source file:Main.java

private static byte[] getRawKey(byte[] seed) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");
    sr.setSeed(seed);/*from   w w  w . j a  va 2s  .  c  o m*/
    kgen.init(128, sr);
    SecretKey skey = kgen.generateKey();
    byte[] raw = skey.getEncoded();
    return raw;
}

From source file:Main.java

private static byte[] getRawKey(byte[] seed) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");
    sr.setSeed(seed);//  w w  w  . j a  va 2s  .co  m
    kgen.init(128, sr);
    SecretKey sKey = kgen.generateKey();
    byte[] raw = sKey.getEncoded();

    return raw;
}

From source file:models.logic.CipherDecipher.java

public static SecretKey generateKey() throws NoSuchAlgorithmException {
    KeyGenerator keyGenS = KeyGenerator.getInstance("AES");
    keyGenS.init(128);//w ww  .j a  v  a  2  s. co m
    SecretKey sKey = keyGenS.generateKey();

    return sKey;
}

From source file:Main.java

public static byte[] generateKey(String password) throws Exception {
    byte[] keyStart = password.getBytes("UTF-8");

    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG", "Crypto");
    sr.setSeed(keyStart);//from   w  w w .j  ava 2 s . c om
    kgen.init(128, sr);
    SecretKey skey = kgen.generateKey();
    return skey.getEncoded();
}

From source file:com.thoughtworks.go.server.util.EncryptionHelper.java

public static SecretKey generateAESKey() throws NoSuchAlgorithmException {
    KeyGenerator generator = KeyGenerator.getInstance("AES");
    generator.init(128); // The AES key size in number of bits
    return generator.generateKey();
}

From source file:org.apache.xml.security.samples.encryption.Encrypter.java

private static SecretKey GenerateAndStoreKeyEncryptionKey() throws Exception {

    String jceAlgorithmName = "DESede";
    KeyGenerator keyGenerator = KeyGenerator.getInstance(jceAlgorithmName);
    SecretKey kek = keyGenerator.generateKey();

    byte[] keyBytes = kek.getEncoded();
    File kekFile = new File("kek");
    FileOutputStream f = new FileOutputStream(kekFile);
    f.write(keyBytes);//from w ww . ja  va2  s. co  m
    f.close();
    System.out.println("Key encryption key stored in " + kekFile.toURL().toString());

    return kek;
}