/*

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

* verifier abstract interface

*

*/

/**

 @file

 @publishedPartner

 @released

*/

#ifndef __CRYPTOAPI_VERIFIER_H__

#define __CRYPTOAPI_VERIFIER_H__

namespace CryptoSpi

	{

	/**

	The Verifier definition. Intended to allow plug-ins

	to implement extensible signature verifier functionality, and to work with all

	known existing  signature algorithms, e.g. DSA, RSA etc

	*/

	class MVerifier : public MSignatureBase

		{

	public:

		/**

		Verify the signature

		@param aInput	The hash of the message to be verified

		@param aSignature	The signature of the hash

		@param aVerificationResult	Indicates the success or failure of the verification

		@leave ...	Any of the crypto error codes defined in 

  					cryptospi_errs.h or any of the system-wide error codes.

		*/

		virtual void VerifyL(const TDesC8& aInput, const CCryptoParams& aSignature, TBool& aVerificationResult) = 0;

		/**

		Unsign the signature

		@param aOutput	The unsigned hash

		@param aSignature	The signature of the hash

		@leave ...	Any of the crypto error codes defined in 

  					cryptospi_errs.h or any of the system-wide error codes.

		*/

		virtual void InverseSignL(HBufC8*& aOutput, const CCryptoParams& aSignature) = 0;

		};

	class MAsyncVerifier : public MSignatureBase

		{

	public:

		/**

		Verify the signature

		@param aInput	The hash of the message to be verified

		@param aSignature	The signature of the hash

		@param aVerificationResult	Indicates the success or failure of the verification

		@param aRequestStatus

		@leave ...	Any of the crypto error codes defined in 

  					cryptospi_errs.h or any of the system-wide error codes.

		*/

		virtual void VerifyL(const TDesC8& aInput, const CCryptoParams& aSignature, TBool& aVerificationResult, TRequestStatus& aRequestStatus) = 0;

		/**

		Unsign the signature

		@param aOutput	The unsigned hash

		@param aSignature	The signature of the hash

		@param aRequestStatus the request status.

		@leave ...	Any of the crypto error codes defined in 

  					cryptospi_errs.h or any of the system-wide error codes.

		*/

		virtual void InverseSignL(HBufC8*& aOutput, const CCryptoParams& aSignature, TRequestStatus& aRequestStatus) = 0;

		/**

		Cancel the outstanding request

		*/

		virtual void Cancel() = 0;

		};

	} //namespace CryptoSpi

#endif //__CRYPTOAPI_VERIFIER_H__