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.

        p = g.generateKeyPair();


        sKey = p.getPrivate();
        vKey = p.getPublic();


        s.initSign(sKey);


        s.update(data);


        sigBytes = s.sign();

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        PublicKey   vKey = p.getPublic();
        
        Signature           s = Signature.getInstance("DSA", "BC");
        byte[]              data = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 };
        
        s.initSign(sKey);
        
        s.update(data);
        
        byte[]  sigBytes = s.sign();

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        }


        Signature           s = Signature.getInstance("DSA", "BC");
        byte[]              data = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 };


        s.initSign(sKey);


        s.update(data);


        byte[]  sigBytes = s.sign();

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        PublicKey   vKey = p.getPublic();
        
        //
        // sign SUN - verify with BC 
        //
        s.initSign(sKey);
        
        s.update(data);
        
        byte[]  sigBytes = s.sign();

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        //
        // sign BC - verify with SUN
        //
        
        s.initSign(sKey);
        
        s.update(data);
        
        sigBytes = s.sign();

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        KeyPair          kp = kpGen.generateKeyPair();


        Signature        sig = Signature.getInstance("NONEwithDSA", "BC");


        sig.initSign(kp.getPrivate());


        sig.update(dummySha1);


        byte[] sigBytes = sig.sign();

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        Signature           sgr = Signature.getInstance("ECDSA", "BC");
        KeyFactory          f = KeyFactory.getInstance("ECDSA", "BC");
        PrivateKey          sKey = f.generatePrivate(priKey);
        PublicKey           vKey = f.generatePublic(pubKey);
        
        sgr.initSign(sKey, k);
        
        byte[] message = new byte[] { (byte)'a', (byte)'b', (byte)'c' };
        
        sgr.update(message);

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      throws NoSuchAlgorithmException, SignatureException,
      InvalidKeyException {


    Signature sign = Signature.getInstance(signature.getIdHash() + "with"
        + signature.getIdAlg());
    sign.initSign(signature.getKey());
    sign.update(value.getBytes(), 0, value.getBytes().length);
    return sign.sign();
  }


}

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                             String data,
                             SignatureAlgorithm algorithm)
      throws GeneralSecurityException {


    Signature signature = Signature.getInstance(algorithm.getJCAName());
    signature.initSign(key);
    signature.update(data.getBytes());
    return signature.sign();
  }

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  public String getSignature(String baseString, OAuthParameters oauthParameters)
      throws OAuthException {
    try {
      Signature signer = Signature.getInstance("SHA1withRSA");
      signer.initSign(privateKey);
      signer.update(baseString.getBytes("UTF-8"));
      return Base64.encode(signer.sign());
    } catch (NoSuchAlgorithmException e) {
      throw new OAuthException("Error generating signature", e);
    } catch (InvalidKeyException e) {

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