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#ifndef Pegasus_LocalAuthenticator_h
#define Pegasus_LocalAuthenticator_h

#include <Pegasus/Common/Config.h>
#include <Pegasus/Common/String.h>

#include <Pegasus/Security/Authentication/Linkage.h>

PEGASUS_NAMESPACE_BEGIN


/**
    This is an abstract class that the local authenticators will extend and
    provide the implementation. Sample implementation can be seen in
    SecureLocalAuthenticator.cpp
*/
class PEGASUS_SECURITY_LINKAGE LocalAuthenticator
{
public:

    /** constructor. */
    LocalAuthenticator() { };

    /** destructor. */
    virtual ~LocalAuthenticator() { };

    /** Verify the authentication of the requesting user.
        @param userName String containing the user name
        @param secretReceived String containing the authentication secret
        sent by the client.
        @param secretKept String containing the authentication secret that
        was sent to client as part of the challenge.
        @return true on successful authentication, false otherwise
    */
    virtual Boolean authenticate(
        const String& userName,
        const String& secretReceived,
        const String& secretKept) = 0;

    /** Construct and return the Peagaus Local authentication challenge header
        @param authType String containing the authentication type
        @param userName String containing the user name
        @param filePath String to store the authentication file path
        @param secret String to store the authentication secret
        @return A string containing the authentication challenge header.
    */
    virtual String getAuthResponseHeader(
        const String& authType,
        const String& userName,
        String& filePath,
        String& secret) = 0;

    /**
        Verify whether the user is valid.
        @param userName String containing the user name
        @return true on successful validation, false otherwise
    */
    virtual Boolean validateUser(const String& userName) = 0;
};


PEGASUS_NAMESPACE_END

#endif /* Pegasus_LocalAuthenticator_h */
