package org.bouncycastle.tls.crypto.impl.jcajce;
import java.security.InvalidKeyException;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import org.bouncycastle.tls.crypto.TlsMAC;
/**
* A basic wrapper for a JCE Mac class to provide the needed functionality for TLS.
*/
public class JceTlsMAC
implements TlsMAC
{
private final String algorithm;
private Mac mac;
public JceTlsMAC(Mac mac, String algorithm)
{
this.mac = mac;
this.algorithm = algorithm;
}
public void setKey(byte[] key)
{
try
{
mac.init(new SecretKeySpec(key, algorithm));
}
catch (InvalidKeyException e)
{
e.printStackTrace();
}
}
public void update(byte[] input, int inOff, int length)
{
mac.update(input, inOff, length);
}
public byte[] calculateMAC()
{
return mac.doFinal();
}
public int getMacLength()
{
return mac.getMacLength();
}
public void reset()
{
mac.reset();
}
}