org.bouncycastle.tls.crypto.TlsMAC Maven / Gradle / Ivy
package org.bouncycastle.tls.crypto;
/**
* Interface for MAC services.
*/
public interface TlsMAC
{
/**
* Set the key to be used by the MAC implementation supporting this service.
*
* @param key array holding the MAC key.
* @param keyOff offset into the array the key starts at.
* @param keyLen length of the key in the array.
*/
void setKey(byte[] key, int keyOff, int keyLen);
/**
* Update the MAC with the passed in input.
*
* @param input input array containing the data.
* @param inOff offset into the input array the input starts at.
* @param length the length of the input data.
*/
void update(byte[] input, int inOff, int length);
/**
* Return calculated MAC for any input passed in.
*
* @return the MAC value.
*/
byte[] calculateMAC();
/**
* Write the calculated MAC to an output buffer.
*
* @param output output array to write the MAC to.
* @param outOff offset into the output array to write the MAC to.
*/
void calculateMAC(byte[] output, int outOff);
/**
* Return the length of the MAC generated by this service.
*
* @return the MAC length.
*/
int getMacLength();
/**
* Reset the MAC underlying this service.
*/
void reset();
}