org.bouncycastle.operator.ContentVerifier Maven / Gradle / Ivy
package org.bouncycastle.operator;
import java.io.OutputStream;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
/**
* General interface for an operator that is able to verify a signature based
* on data in a stream of output.
*/
public interface ContentVerifier
{
/**
* Return the algorithm identifier describing the signature
* algorithm and parameters this verifier supports.
*
* @return algorithm oid and parameters.
*/
AlgorithmIdentifier getAlgorithmIdentifier();
/**
* Returns a stream that will accept data for the purpose of calculating
* a signature for later verification. Use org.bouncycastle.util.io.TeeOutputStream if you want to accumulate
* the data on the fly as well.
*
* @return an OutputStream
*/
OutputStream getOutputStream();
/**
* Return true if the expected value of the signature matches the data passed
* into the stream.
*
* @param expected expected value of the signature on the data.
* @return true if the signature verifies, false otherwise
*/
boolean verify(byte[] expected);
}