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.

        catch (Exception e)
        {
            throw new IllegalArgumentException("exception encoding TBS cert request - " + e);
        }


        this.sigBits = new DERBitString(sig.sign());
    }


    /**
     * return the public key associated with the certification request -
     * the public key is created using the BC provider.

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        catch (IOException ioe)
        {
            throw new SignatureException(ioe.getMessage());
        }


        sigBits = sig.sign();
    }


    private ASN1Primitive getKeySpec() throws NoSuchAlgorithmException,
            InvalidKeySpecException, NoSuchProviderException
    {

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            sig.initSign(key);
        }


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


        return sig.sign();
    }


    static byte[] calculateSignature(
        DERObjectIdentifier sigOid,
        String              sigName,

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            sig.initSign(key);
        }


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


        return sig.sign();
    }


    static X509Principal convertPrincipal(
        X500Principal principal)
    {

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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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        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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        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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        sgr.initSign(sKey, k);


        sgr.update(message);


        byte[]  sigBytes = sgr.sign();


        sgr = Signature.getInstance(oid.getId(), "BC");


        sgr.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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