Examples of java.security.Signature.initSign()

java.security.Signature.initSign()
Initialize this object for signing. If this method is called again with a different argument, it negates the effect of this call. @param privateKey the private key of the identity whose signatureis going to be generated. @exception InvalidKeyException if the key is invalid.

        {
            sig.initSign(key, random);
        }
        else
        {
            sig.initSign(key);
        }


        sig.update(object.getEncoded(ASN1Encodable.DER));


        return sig.sign();

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        sig = X509Util.getSignatureInstance(sigName, provider);


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

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        {
            sig.initSign(key, random);
        }
        else
        {
            sig.initSign(key);
        }


        sig.update(object.getEncoded(ASN1Encodable.DER));


        return sig.sign();

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     * @return
     */
    public byte[] generateSignature(byte[] data) {
        try {
            Signature sig = Signature.getInstance("SHA1withRSA");
            sig.initSign(prvKey);
            sig.update(data);


            ByteArrayWriter baw = new ByteArrayWriter();
            baw.writeString(getAlgorithmName());
            baw.writeBinaryString(sig.sign());

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     */
    public byte[] generateSignature(byte[] data)
        throws InvalidSignatureException {
        try {
            Signature sig = Signature.getInstance("SHA1withDSA");
            sig.initSign(prvkey);


            sig.update(data);


            byte[] signature = sig.sign();
            byte[] decoded = new byte[40];

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      Signature signature = null;
      try
      {
         signature = Signature.getInstance(algorithm);
         signature.initSign(key);
      }
      catch (Exception e)
      {
         throw new SignatureException(e);
      }

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            /* Signature */
            Signature sign = Signature.getInstance(algo, SOSSignature.provider);


            /* initialis. mit prived key */
            sign.initSign(privKey);


            /* lesen aus fileToSign und update() */
            FileInputStream fis = new FileInputStream(fileToSign);
            BufferedInputStream bufin = new BufferedInputStream(fis);
            byte[] buffer = new byte[1024];

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            else {
                sig = Signature.getInstance(signatureAlgorithm, provider);
            }
        }


        sig.initSign(signingKey);


        try
        {
            ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
            DEROutputStream         dOut = new DEROutputStream(bOut);

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            }
        }


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

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        {
            sig.initSign(key, random);
        }
        else
        {
            sig.initSign(key);
        }


        TBSCertificateStructure tbsCert = tbsGen.generateTBSCertificate();


        try

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