Examples of java.security.Signature$SignatureImpl

java.security.Signature
Internal Signature implementation

    public final void verify(
        PublicKey   key)
        throws CertificateException, NoSuchAlgorithmException,
        InvalidKeyException, NoSuchProviderException, SignatureException
    {
        Signature   signature;
        String      sigName = X509SignatureUtil.getSignatureName(c.getSignatureAlgorithm());
        
        try
        {
            signature = Signature.getInstance(sigName, BouncyCastleProvider.PROVIDER_NAME);

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        String      sigProvider)
        throws CertificateException, NoSuchAlgorithmException,
        InvalidKeyException, NoSuchProviderException, SignatureException
    {
        String    sigName = X509SignatureUtil.getSignatureName(c.getSignatureAlgorithm());
        Signature signature = Signature.getInstance(sigName, sigProvider);
        
        checkSignature(key, signature);
    }

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        //
        // Verify the signature .. shows the response was generated
        // by someone who knew the associated private key
        //
        Signature sig = Signature.getInstance(sigAlg.getObjectId().getId(),
                "BC");
        sig.initVerify(pubkey);
        sig.update(content.getBytes());


        return sig.verify(sigBits);
    }

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    public void sign(PrivateKey priv_key, SecureRandom rand)
            throws NoSuchAlgorithmException, InvalidKeyException,
            SignatureException, NoSuchProviderException,
            InvalidKeySpecException
    {
        Signature sig = Signature.getInstance(sigAlg.getAlgorithm().getId(),
                "BC");


        if (rand != null)
        {
            sig.initSign(priv_key, rand);
        }
        else
        {
            sig.initSign(priv_key);
        }


        ASN1EncodableVector pkac = new ASN1EncodableVector();


        pkac.add(getKeySpec());
        pkac.add(new DERIA5String(challenge));


        try
        {
            sig.update(new DERSequence(pkac).getEncoded(ASN1Encoding.DER));
        }
        catch (IOException ioe)
        {
            throw new SignatureException(ioe.getMessage());
        }


        sigBits = sig.sign();
    }

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        PrivateKey          key,
        SecureRandom        random,
        ASN1Encodable       object)
        throws IOException, NoSuchAlgorithmException, InvalidKeyException, SignatureException
    {
        Signature sig;


        if (sigOid == null)
        {
            throw new IllegalStateException("no signature algorithm specified");
        }


        sig = X509Util.getSignatureInstance(sigName);


        if (random != null)
        {
            sig.initSign(key, random);
        }
        else
        {
            sig.initSign(key);
        }


        sig.update(object.toASN1Primitive().getEncoded(ASN1Encoding.DER));


        return sig.sign();
    }

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        PrivateKey          key,
        SecureRandom        random,
        ASN1Encodable       object)
        throws IOException, NoSuchProviderException, NoSuchAlgorithmException, InvalidKeyException, SignatureException
    {
        Signature sig;


        if (sigOid == null)
        {
            throw new IllegalStateException("no signature algorithm specified");
        }


        sig = X509Util.getSignatureInstance(sigName, provider);


        if (random != null)
        {
            sig.initSign(key, random);
        }
        else
        {
            sig.initSign(key);
        }


        sig.update(object.toASN1Primitive().getEncoded(ASN1Encoding.DER));


        return sig.sign();
    }

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            PublicKey   key,
            String      provider)
            throws CertificateException, NoSuchAlgorithmException,
            InvalidKeyException, NoSuchProviderException, SignatureException
    {
        Signature   signature = null;


        if (!cert.getSignatureAlgorithm().equals(cert.getAcinfo().getSignature()))
        {
            throw new CertificateException("Signature algorithm in certificate info not same as outer certificate");
        }


        signature = Signature.getInstance(cert.getSignatureAlgorithm().getObjectId().getId(), provider);


        signature.initVerify(key);


        try
        {
            signature.update(cert.getAcinfo().getEncoded());
        }
        catch (IOException e)
        {
            throw new SignatureException("Exception encoding certificate info object");
        }


        if (!signature.verify(this.getSignature()))
        {
            throw new InvalidKeyException("Public key presented not for certificate signature");
        }
    }

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        KeyPairGenerator    g = KeyPairGenerator.getInstance("ECDSA", "BC");


        g.initialize(ecSpec, new SecureRandom());


        Signature sgr = Signature.getInstance("ECDSA", "BC");
        KeyPair   pair = g.generateKeyPair();
        PrivateKey sKey = pair.getPrivate();
        PublicKey vKey = pair.getPublic();


        sgr.initSign(sKey);


        byte[] message = new byte[] { (byte)'a', (byte)'b', (byte)'c' };


        sgr.update(message);


        byte[]  sigBytes = sgr.sign();


        sgr.initVerify(vKey);


        sgr.update(message);


        if (!sgr.verify(sigBytes))
        {
            fail(name + " verification failed");
        }


        //

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        KeyPairGenerator    g = KeyPairGenerator.getInstance("ECGOST3410", "BC");


        g.initialize(ecSpec, new SecureRandom());


        Signature sgr = Signature.getInstance("ECGOST3410", "BC");
        KeyPair   pair = g.generateKeyPair();
        PrivateKey sKey = pair.getPrivate();
        PublicKey vKey = pair.getPublic();


        sgr.initSign(sKey);


        byte[] message = new byte[] { (byte)'a', (byte)'b', (byte)'c' };


        sgr.update(message);


        byte[]  sigBytes = sgr.sign();


        sgr.initVerify(vKey);


        sgr.update(message);


        if (!sgr.verify(sigBytes))
        {
            fail(name + " verification failed");
        }


        //

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        ECPublicKeySpec pubKey = new ECPublicKeySpec(
                curve.decodePoint(Hex.decode("025b6dc53bc61a2548ffb0f671472de6c9521a9d2d2534e65abfcbd5fe0c70")), // Q
                spec);


        Signature           sgr = Signature.getInstance("NONEwithECDSA", "BC");
        KeyFactory          f = KeyFactory.getInstance("ECDSA", "BC");
        PrivateKey          sKey = f.generatePrivate(priKey);
        PublicKey           vKey = f.generatePublic(pubKey);


        byte[] message = "abc".getBytes();

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