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

private static byte[] getRawKey(byte[] seed) throws Exception {
    KeyGenerator kgen = KeyGenerator.getInstance("AES");
    SecureRandom sr = SecureRandom.getInstance("SHA1PRNG");
    sr.setSeed(seed);/*from  w  ww .  ja  v  a  2s  . 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:org.oscarehr.common.hl7.v2.oscar_to_oscar.SendingUtils.java

private static SecretKey createSecretKey() throws NoSuchAlgorithmException {
    KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
    keyGenerator.init(128);/*from w ww. j a  va  2 s  . c om*/
    return (keyGenerator.generateKey());
}

From source file:de.hybris.platform.b2b.punchout.services.impl.SymmetricManager.java

public static String getKey() {
    String key = null;/*ww w.java 2 s.c  o  m*/
    try {
        final KeyGenerator kgen = KeyGenerator.getInstance(ALGORITHM);
        kgen.init(KEY_SIZE);
        // Generate the secret key specs.
        final SecretKey skey = kgen.generateKey();
        final byte[] raw = skey.getEncoded();
        key = new Base64().encodeAsString(raw);
    } catch (final NoSuchAlgorithmException e) {
        // should never happen
        LOG.error("System was unable to generate the key.", e);
    }
    return key;
}

From source file:com.hernandez.rey.crypto.TripleDES.java

/**
 * Generate a secret TripleDES encryption/decryption key
 * //from  w w w. j a  va2s  .c o  m
 * @return the secret key generated
 * @throws NoSuchAlgorithmException
 */
public static SecretKey generateKey() throws NoSuchAlgorithmException {
    // Get a key generator for Triple DES (a.k.a DESede)
    final KeyGenerator keygen = KeyGenerator.getInstance("DESede");
    // Use it to generate a key
    return keygen.generateKey();
}

From source file:com.wabacus.util.DesEncryptTools.java

public static boolean createEncryptKey(File file) {
    SecretKey deskey = null;//from w  w  w  .  ja  va 2 s  . co  m
    try {
        KeyGenerator keygen = KeyGenerator.getInstance("DESede");
        deskey = keygen.generateKey();
    } catch (NoSuchAlgorithmException e) {
        throw new WabacusConfigLoadingException("?", e);
    }
    if (deskey == null)
        return false;
    FileOutputStream fos = null;
    ObjectOutputStream oos = null;
    try {
        fos = new FileOutputStream(file);
        oos = new ObjectOutputStream(fos);
        oos.writeObject(deskey);
    } catch (FileNotFoundException e) {
        throw new WabacusConfigLoadingException(
                "?" + file.getPath(), e);
    } catch (IOException e) {
        throw new WabacusConfigLoadingException(
                "?" + file.getPath() + "", e);
    } finally {
        try {
            if (fos != null)
                fos.close();
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
        try {
            if (oos != null)
                oos.close();
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
    }
    return true;
}

From source file:org.apache.juddi.v3.client.cryptor.TripleDESCrytor.java

/**
 * generates a new key/*from w  ww . jav a  2 s. c o m*/
 * @return a new key
 */
public static String GEN() {
    KeyGenerator kgen;
    try {
        kgen = KeyGenerator.getInstance(DESEDE_ENCRYPTION_SCHEME);
        kgen.init(168);
        SecretKey skey = kgen.generateKey();
        byte[] raw = skey.getEncoded();
        return new String(Base64.encodeBase64(raw));
    } catch (Exception ex) {
        ex.printStackTrace();
        ;
    }
    return null;
}

From source file:Main.java

private static byte[] getRawKey(byte[] paramArrayOfByte) throws Exception {
    KeyGenerator localKeyGenerator = KeyGenerator.getInstance("AES");
    SecureRandom localSecureRandom = SecureRandom.getInstance("SHA1PRNG", "Crypto");
    localSecureRandom.setSeed(paramArrayOfByte);
    localKeyGenerator.init(128, localSecureRandom);
    return localKeyGenerator.generateKey().getEncoded();
}

From source file:com.shenit.commons.codec.CodecUtils.java

/**
 * ??//from  w  w  w .  ja  va2s. c o  m
 * 
 * @return
 */
public static byte[] generateRandomKey(String codec) {
    SecureRandom sr = new SecureRandom();
    // DES?KeyGenerator
    KeyGenerator kg;
    try {
        kg = KeyGenerator.getInstance(codec);
        kg.init(sr);
        // ?
        Key secret = kg.generateKey();
        // ??
        return secret.getEncoded();
    } catch (NoSuchAlgorithmException e) {
        LOG.warn("[generateKey] not supported algorithm -> " + codec);
    }
    return null;
}

From source file:yoyo.framework.standard.shared.SecurityUtils.java

/**
 * ???/*from w ww .ja v a  2  s. c om*/
 * <ul>
 * <li>AES256bit?????</li>
 * <li>SHA1PRNG???????URL?BASE64?????</li>
 * </ul>
 * @return ?(URL?BASE64)
 */
public static String createKey() {
    try {
        final KeyGenerator generator = KeyGenerator.getInstance(ALGO_NAME);
        generator.init(KEY_LENGTH, SecureRandom.getInstance(RAND_NAME));
        return Base64.encodeBase64URLSafeString(generator.generateKey().getEncoded());
    } catch (final NoSuchAlgorithmException e) {
        throw new IllegalArgumentException(e);
    }
}

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

/**
 * ?AES,?128,192,256?.//from  ww w.j  av a2s  .c o  m
 */
public static byte[] generateAesKey(int keysize) {
    try {
        KeyGenerator keyGenerator = KeyGenerator.getInstance(AES);
        keyGenerator.init(keysize);
        SecretKey secretKey = keyGenerator.generateKey();
        return secretKey.getEncoded();
    } catch (GeneralSecurityException e) {
        throw Exceptions.unchecked(e);
    }
}