Java tutorial
package org.bouncycastle.crypto.params; import org.bouncycastle.crypto.CipherParameters; public class KeyParameter implements CipherParameters { private byte[] key; public KeyParameter(byte[] key) { this(key, 0, key.length); } public KeyParameter(byte[] key, int keyOff, int keyLen) { this.key = new byte[keyLen]; System.arraycopy(key, keyOff, this.key, 0, keyLen); } public byte[] getKey() { return key; } }