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The FIPS 140-2 Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms certified to FIPS 140-2 level 1. This jar contains the debug version JCE provider and low-level API for the BC-FJA version 1.0.2.3, FIPS Certificate #3514. Please note the debug jar is not certified.

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/***************************************************************/
/******    DO NOT EDIT THIS CLASS bc-java SOURCE FILE     ******/
/***************************************************************/
package org.bouncycastle.crypto.internal;

import java.math.BigInteger;

/**
 * interface for classes implementing algorithms modeled similar to the Digital Signature Alorithm.
 */
public interface DSA
{
    /**
     * initialise the signer for signature generation or signature
     * verification.
     *
     * @param forSigning true if we are generating a signature, false
     * otherwise.
     * @param param key parameters for signature generation.
     */
    public void init(boolean forSigning, CipherParameters param);

    /**
     * sign the passed in message (usually the output of a hash function).
     *
     * @param message the message to be signed.
     * @return two big integers representing the r and s values respectively.
     */
    public BigInteger[] generateSignature(byte[] message);

    /**
     * verify the message message against the signature values r and s.
     *
     * @param message the message that was supposed to have been signed.
     * @param r the r signature value.
     * @param s the s signature value.
     */
    public boolean verifySignature(byte[] message, BigInteger  r, BigInteger s);
}