Signature.h

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/*
 * Copyright (c) 2004 X-Way Rights BV
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef _CLASS_BEE_SECURITY_SIGNATURE_H
#define _CLASS_BEE_SECURITY_SIGNATURE_H

#ifdef __cplusplus

#include "beecrypt/c++/lang/Object.h"
using beecrypt::lang::Object;
#include "beecrypt/c++/security/SignatureSpi.h"
using beecrypt::security::SignatureSpi;
#include "beecrypt/c++/security/NoSuchAlgorithmException.h"
using beecrypt::security::NoSuchAlgorithmException;
#include "beecrypt/c++/security/NoSuchProviderException.h"
using beecrypt::security::NoSuchProviderException;

namespace beecrypt {
    namespace security {
        class BEECRYPTCXXAPI Signature : public Object
        {
        protected:
            static const int UNINITIALIZED = 0;
            static const int VERIFY = 1;
            static const int SIGN = 2;

        public:
            static Signature* getInstance(const String& algorithm) throw (NoSuchAlgorithmException);
            static Signature* getInstance(const String& algorithm, const String& provider) throw (NoSuchAlgorithmException, NoSuchProviderException);
            static Signature* getInstance(const String& algorithm, const Provider& provider) throw (NoSuchAlgorithmException);

        protected:
            int state;

        private:
            SignatureSpi*   _sspi;
            const Provider* _prov;
            String          _algo;

        protected:
            Signature(SignatureSpi* spi, const Provider* provider, const String& algorithm);

        public:
            virtual ~Signature();

            AlgorithmParameters* getParameters() const;
            void setParameter(const AlgorithmParameterSpec&) throw (InvalidAlgorithmParameterException);

            void initSign(const PrivateKey&) throw (InvalidKeyException);
            void initSign(const PrivateKey&, SecureRandom*) throw (InvalidKeyException);

            void initVerify(const PublicKey&) throw (InvalidKeyException);

            bytearray* sign() throw (IllegalStateException, SignatureException);
            int sign(byte*, int, int) throw (ShortBufferException, IllegalStateException, SignatureException);
            int sign(bytearray&) throw (IllegalStateException, SignatureException);
            bool verify(const bytearray&) throw (IllegalStateException, SignatureException);
            bool verify(const byte*, int, int) throw (IllegalStateException, SignatureException);

            void update(byte) throw (IllegalStateException);
            void update(const byte*, int, int) throw (IllegalStateException);
            void update(const bytearray&) throw (IllegalStateException);

            const String& getAlgorithm() const throw ();
            const Provider& getProvider() const throw ();
        };
    }
}

#endif

#endif