Example usage for java.nio CharBuffer array

Introduction

In this page you can find the example usage for java.nio CharBuffer array.

Prototype

public final char[] array()

Source Link

Document

Returns the char array which this buffer is based on, if there is one.

Usage

From source file:org.janusgraph.graphdb.tinkerpop.gremlin.server.auth.HMACAuthenticator.java

private String generateToken(final String username, final String salt, final String time) {
    try {/*from ww w  .  ja  v  a 2s . co m*/
        final CharBuffer secretAndSalt = CharBuffer.allocate(secret.length + salt.length() + 1);
        secretAndSalt.put(secret);
        secretAndSalt.put(":");
        secretAndSalt.put(salt);
        final String tokenPrefix = username + ":" + time.toString() + ":";
        final SecretKeySpec keySpec = new SecretKeySpec(toBytes(secretAndSalt.array()), hmacAlgo);
        final Mac hmac = Mac.getInstance(hmacAlgo);
        hmac.init(keySpec);
        hmac.update(username.getBytes());
        hmac.update(time.toString().getBytes());
        final Base64.Encoder encoder = Base64.getUrlEncoder();
        final byte[] hmacbytes = encoder.encode(hmac.doFinal());
        final byte[] tokenbytes = tokenPrefix.getBytes();
        final byte[] token = ByteBuffer.wrap(new byte[tokenbytes.length + hmacbytes.length]).put(tokenbytes)
                .put(hmacbytes).array();
        return new String(encoder.encode(token));
    } catch (Exception ex) {
        throw new RuntimeException(ex);
    }
}

From source file:org.janusgraph.graphdb.tinkerpop.gremlin.server.auth.HMACAuthenticator.java

private byte[] toBytes(char[] chars) {
    CharBuffer charBuffer = CharBuffer.wrap(chars);
    ByteBuffer byteBuffer = Charset.forName("UTF-8").encode(charBuffer);
    byte[] bytes = Arrays.copyOfRange(byteBuffer.array(), byteBuffer.position(), byteBuffer.limit());
    Arrays.fill(charBuffer.array(), '\u0000'); //Clear sensitive data from memory
    Arrays.fill(byteBuffer.array(), (byte) 0); //Clear sensitive data from memory
    return bytes;
}

From source file:org.nuxeo.common.codec.Crypto.java

/**
 * Utility method to get {@code char[]} from {@code bytes[]} since it is recommended to store passwords in
 * {@code char[]} rather than in {@code String}.<br>
 * The default charset of this Java virtual machine is used. There can be conversion issue with unmappable
 * characters: they will be replaced with the charset's default replacement string.
 *
 * @param bytes byte array to convert/* ww w  .  ja v a  2 s .  c om*/
 * @return the char array converted from {@code bytes} using the default charset.
 */
public static char[] getChars(byte[] bytes) {
    ByteBuffer byteBuffer = ByteBuffer.wrap(bytes);
    CharBuffer charBuffer = Charset.defaultCharset().decode(byteBuffer);
    return Arrays.copyOfRange(charBuffer.array(), 0, charBuffer.limit());
}

From source file:sh.isaac.provider.sync.git.gitblit.utils.ConnectionUtils.java

/**
 * To bytes.//w w w  .ja v a 2 s .  c o  m
 *
 * @param chars the chars
 * @return the byte[]
 */
private static byte[] toBytes(char[] chars) {
    final CharBuffer charBuffer = CharBuffer.wrap(chars);
    final ByteBuffer byteBuffer = Charset.forName("UTF-8").encode(charBuffer);
    final byte[] bytes = Arrays.copyOfRange(byteBuffer.array(), byteBuffer.position(), byteBuffer.limit());

    Arrays.fill(charBuffer.array(), '\u0000'); // clear sensitive data
    Arrays.fill(byteBuffer.array(), (byte) 0); // clear sensitive data
    return bytes;
}