Examples of java.security.Signature.sign()

java.security.Signature.sign()
Returns the signature bytes of all the data updated. The format of the signature depends on the underlying signature scheme.
A call to this method resets this signature object to the state it was in when previously initialized for signing via a call to initSign(PrivateKey). That is, the object is reset and available to generate another signature from the same signer, if desired, via new calls to update and sign. @return the signature bytes of the signing operation's result. @exception SignatureException if this signature object is notinitialized properly or if this signature algorithm is unable to process the input data provided.

        
        s.setParameter(new PSSParameterSpec("SHA-512", "MGF1", new MGF1ParameterSpec("SHA-512"), 0, 1));
        s.initSign(privKey);


        s.update(msg1a);
        sig = s.sign();


        pss = s.getParameters();
        
        if (!arrayEquals(sig1c, sig))
        {

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        byte[] fixedRandomBytes = new byte[saltLen];
        random.nextBytes(fixedRandomBytes);


        normalSig.initSign(privKey, new FixedSecureRandom(fixedRandomBytes));
        normalSig.update(sampleMessage);
        byte[] normalResult = normalSig.sign();


        MessageDigest digest = MessageDigest.getInstance(digestOID.getId(), "BC");
        byte[] hash = digest.digest(sampleMessage);


        Signature rawSig = Signature.getInstance("RAWRSASSA-PSS", "BC");

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        // Need to init the params explicitly to avoid having a 'raw' variety of every PSS algorithm
        rawSig.setParameter(spec);


        rawSig.initSign(privKey, new FixedSecureRandom(fixedRandomBytes));
        rawSig.update(hash);
        byte[] rawResult = rawSig.sign();


        if (!Arrays.areEqual(normalResult, rawResult))
        {
            fail("raw mode signature differs from normal one");
        }

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


        sgr.update(message);


        byte[]  sigBytes = sgr.sign();


        sgr.initVerify(vKey);


        sgr.update(message);

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        sgr.initSign(sKey, k);


        sgr.update(message);
        
        byte[]  sigBytes = sgr.sign();


        sgr.initVerify(vKey);


        sgr.update(message);

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        s.initSign(sKey);


        s.update(data);


        byte[] sigBytes = s.sign();


        s = Signature.getInstance("ECDSA", "BC");


        s.initVerify(vKey);

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        s.initSign(sKey);


        s.update(data);


        byte[] sigBytes = s.sign();


        s = Signature.getInstance("ECDSA", "BC");


        s.initVerify(vKey);

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


        sgr.update(message);


        byte[] sigBytes = sgr.sign();


        sgr.initVerify(pair.getPublic());


        sgr.update(message);

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


        sgr.update(message);


        byte[] sigBytes = sgr.sign();


        sgr.initVerify(vKey);


        sgr.update(message);

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        try
        {
            sig.update(tbsResp.getEncoded(ASN1Encoding.DER));


            bitSig = new DERBitString(sig.sign());
        }
        catch (Exception e)
        {
            throw new OCSPException("exception processing TBSRequest: " + e, e);
        }

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