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.initSign(sKey);


        s.update(data);


        sigBytes = s.sign();


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


        s.initVerify(vKey);

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        s.initSign(sKey);


        s.update(data);


        sigBytes = s.sign();


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


        s.initVerify(vKey);

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        s.initSign(sKey);


        s.update(data);


        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("DSA", "BC");
        
        s.initVerify(vKey);

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        s.initSign(sKey);


        s.update(data);


        byte[]  sigBytes = s.sign();


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


        s.initVerify(vKey);

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        //
        s.initSign(sKey);
        
        s.update(data);
        
        byte[]  sigBytes = s.sign();
        
        s = Signature.getInstance("DSA", "BC");
        
        s.initVerify(vKey);

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        s.initSign(sKey);
        
        s.update(data);
        
        sigBytes = s.sign();
        
        s = Signature.getInstance("DSA", "SUN");
        
        s.initVerify(vKey);

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        sig.initSign(kp.getPrivate());


        sig.update(dummySha1);


        byte[] sigBytes = sig.sign();


        sig.initVerify(kp.getPublic());


        sig.update(dummySha1);

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    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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      throws GeneralSecurityException {


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




  /**
   * Returns the signature algorithm to be used for the provided private key.

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