jce/provider/DSABase.java

8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrompackage org.bouncycastle.jce.provider;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstromimport java.math.BigInteger;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstromimport java.security.SignatureException;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstromimport java.security.SignatureSpi;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstromimport java.security.PrivateKey;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstromimport java.security.InvalidKeyException;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstromimport java.security.spec.AlgorithmParameterSpec;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstromimport org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstromimport org.bouncycastle.asn1.x509.X509ObjectIdentifiers;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstromimport org.bouncycastle.crypto.DSA;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstromimport org.bouncycastle.crypto.Digest;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrompublic abstract class DSABase
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    extends SignatureSpi
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    implements PKCSObjectIdentifiers, X509ObjectIdentifiers
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom{
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    protected Digest                  digest;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    protected DSA                     signer;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    protected DSAEncoder              encoder;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    protected DSABase(
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        Digest                  digest,
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        DSA                     signer,
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        DSAEncoder              encoder)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        this.digest = digest;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        this.signer = signer;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        this.encoder = encoder;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    protected void engineInitSign(
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        PrivateKey privateKey)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    throws InvalidKeyException
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        engineInitSign(privateKey, null);
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    protected void engineUpdate(
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        byte    b)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        throws SignatureException
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        digest.update(b);
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    protected void engineUpdate(
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        byte[]  b,
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        int     off,
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        int     len)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        throws SignatureException
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        digest.update(b, off, len);
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    protected byte[] engineSign()
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        throws SignatureException
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        byte[]  hash = new byte[digest.getDigestSize()];
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        digest.doFinal(hash, 0);
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        try
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom            BigInteger[]    sig = signer.generateSignature(hash);
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom            return encoder.encode(sig[0], sig[1]);
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        catch (Exception e)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom            throw new SignatureException(e.toString());
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    protected boolean engineVerify(
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        byte[]  sigBytes)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        throws SignatureException
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        byte[]  hash = new byte[digest.getDigestSize()];
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        digest.doFinal(hash, 0);
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        BigInteger[]    sig;
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        try
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom            sig = encoder.decode(sigBytes);
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        catch (Exception e)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom            throw new SignatureException("error decoding signature bytes.");
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        return signer.verifySignature(hash, sig[0], sig[1]);
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    protected void engineSetParameter(
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        AlgorithmParameterSpec params)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        throw new UnsupportedOperationException("engineSetParameter unsupported");
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    /**
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom     * @deprecated replaced with <a href = "#engineSetParameter(java.security.spec.AlgorithmParameterSpec)">
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom     */
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    protected void engineSetParameter(
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        String  param,
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        Object  value)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        throw new UnsupportedOperationException("engineSetParameter unsupported");
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    /**
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom     * @deprecated
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom     */
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    protected Object engineGetParameter(
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        String      param)
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    {
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom        throw new UnsupportedOperationException("engineSetParameter unsupported");
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom    }
8212855a312dc8ebe081a3e08b1d2d8f8757af02Brian Carlstrom}