///////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) Microsoft Corporation
//
// SYNOPSIS
//
//   Declares datastructures that are needed by eap methods on the Peer.
//
///////////////////////////////////////////////////////////////////////////////

#ifndef EAP_METHOD_AUTHENTICATOR_APIS_H
#define EAP_METHOD_AUTHENTICATOR_APIS_H
#pragma once

#ifndef __eapauthenticatortypes_h__
#include "EapAuthenticatorTypes.h"
#endif

#ifndef EAPAUTHENTICATORACTIONDEFINE_H
#include "EapAuthenticatorActionDefine.h"
#endif

#ifdef __cplusplus
extern "C" {
#endif

//
// Defines used for installation of EAP DLL
// HKLM\System\CCS\Services\Eaphost\Methods\[AuthorId]\[EapTypeId])
//
// Custom EAP DLL registry installation example:
//                     Name      =  Sample.dll, 
//                     AuthorId  =  311(Microsoft), 
//                     EapTypeId = (decimal 40) 
// HKLM\System\CCS\Services\Eaphost\Methods\311\40
//
//      AuthenticatorDllPath             (REG_EXPAND_SZ) %SystemRoot%\system32\sample.dll
//      AuthenticatorFriendlyName        (REG_SZ) Sample EAP Protocol

//
// Defines used for installation of EAP DLL
// HKLM\System\CCS\Services\Eaphost\Methods\[AuthorId]\254\[VendorId]\[EapTypeId])
//
// Custom Expanded EAP DLL registry installation example:
//                     Name      =  Sample.dll, 
//                     AuthorId  =  311(Microsoft),
//                     VendorId  =  311(Microsoft),
//                     EapTypeId = (decimal 40) 
// HKLM\System\CCS\Services\Eaphost\Methods\311\254\311\40
//
//      AuthenticatorDllPath             (REG_EXPAND_SZ) %SystemRoot%\system32\sample.dll
//      AuthenticatorFriendlyName        (REG_SZ) Sample EAP Protocol


//      ConfigCLSID         (REG_SZ)        {0000031A-0000-0000-C000-000000000046}
//      StandaloneSupported (REG_DWORD)     1
//


#define EAP_REGISTRY_LOCATION   \
    TEXT("System\\CurrentControlSet\\Services\\EapHost\\Methods")

#define EAP_AUTHENTICATOR_VALUENAME_DLL_PATH      TEXT("AuthenticatorDllPath")
#define EAP_AUTHENTICATOR_VALUENAME_FRIENDLY_NAME TEXT("AuthenticatorFriendlyName")
#define EAP_AUTHENTICATOR_VALUENAME_PROPERTIES   TEXT("Properties")
#define EAP_AUTHENTICATOR_VALUENAME_CONFIGUI TEXT("AuthenticatorConfigUIPath")

//For authenticator
// Are these needed any more? Or are we going to define better ways of 
// encapsulating them.
//#define EAP_AUTHENTICATOR_VALUENAME_CONFIG_CLSID      TEXT("ConfigCLSID")
//#define EAP_AUTHENTICATOR_VALUENAME_PER_POLICY_CONFIG TEXT("PerPolicyConfig")


// Structures used by EAP methods on the peer to communicate with the host.

// List of functions corresponding to the particular EAP method 
typedef struct _EAP_AUTHENTICATOR_METHOD_ROUTINES 
{  
   // FIXME: Why is the size needed?
   DWORD dwSizeInBytes;
   EAP_METHOD_TYPE* pEapType;


   DWORD (APIENTRY * EapMethodAuthenticatorInitialize) (
            IN EAP_METHOD_TYPE* pEapType, 
            OUT EAP_ERROR** ppEapError
            );

   DWORD (APIENTRY * EapMethodAuthenticatorBeginSession) (
         // Flags to qualify the authentication process.
         IN DWORD dwFlags,
         // Identity of the user being authenticated
         IN LPCWSTR pwszIdentity,
         // Pointer to an array of attributes. This array contains attributes that 
         // describe the entity being authenticated. 
         IN const EapAttributes* const pAttributeArray,
         // Specifies the size in bytes of the data pointed to by pConnectionData. 
         // If pConnectionData is NULL, this member is zero. 
         IN DWORD dwSizeofConnectionData,
         // Pointer to connection data received from the authentication protocol's 
         // configuration user interface.
         IN const BYTE* const pConnectionData,
         // This is the maximum size of an eap packet that the authenticator can send.
         IN DWORD dwMaxSendPacketSize,
         // The session handle that identifies the current authentication session.
         OUT EAP_SESSION_HANDLE* pSessionHandle,
         // On an unsuccessful call, this will contain any error information about
         // the failure. This will be null on a successful call.
         OUT EAP_ERROR** ppEapError
         );

   DWORD (APIENTRY * EapMethodAuthenticatorUpdateInnerMethodParams)(
         // context handle as returned from a successful call to 
         // EapAuthenticatorBeginSession
         IN EAP_SESSION_HANDLE sessionHandle,
         IN DWORD dwFlags,
         IN CONST WCHAR* pwszIdentity,
         // Pointer to an array of attributes. This array contains attributes that 
         // describe the entity being authenticated. 
         IN const EapAttributes* const pAttributeArray,
         // On an unsuccessful call, this will contain any error information about
         // the failure. This will be null on a successful call.
         OUT EAP_ERROR** ppEapError         
         );

      // The authenticator calls this any time it receives a packet that the eaphost
      // needs to process. This should be called only after a successful call to
      // EapAuthenticatorBeginSession.
   DWORD (APIENTRY * EapMethodAuthenticatorReceivePacket) (
            // context handle as returned from a successful call to 
            // EapAuthenticatorBeginSession
            IN EAP_SESSION_HANDLE sessionHandle,
            // Specifies the size, in bytes, of the buffer pointed to by 
            // pReceivePacket
            IN DWORD cbReceivePacket,
            // Pointer to a buffer that contains the incoming EAP data received by 
            // the supplicant.
            IN const EapPacket* const pReceivePacket,
            // This enumeration tells the supplicant to take an appropriate action.
            // The supplicant will typically look at this action and either call 
            // another method on eaphost or do something else on its own.
            OUT EAP_METHOD_AUTHENTICATOR_RESPONSE_ACTION* pEapOutput,
            // On an unsuccessful call, this will contain any error information about
            // the failure. This will be null on a successful call.      
            OUT EAP_ERROR** ppEapError
            );


   DWORD (APIENTRY * EapMethodAuthenticatorSendPacket) (
            // context handle as returned from a successful call to 
            // EapHostAuthenticatorBeginSession
            IN EAP_SESSION_HANDLE sessionHandle,
            // Id to use when constructing the SendPacket
            IN BYTE bPacketId,
            // Specifies the limit on the size, in bytes, on the packet generated
            // by eaphost. On a successful return, this will contain the size of the 
            // data added by the eap module.
            OUT DWORD* pcbSendPacket,
            // Pointer to a buffer that is allocated by the client and populated
            // by the eap module. The value of the incoming buffer is ignored and
            // the method populates it from the beginning of the buffer.
            OUT EapPacket* pSendPacket,
            // Timeout option for sending the packet
            OUT EAP_AUTHENTICATOR_SEND_TIMEOUT* pTimeout,
            // On an unsuccessful call, this will contain any error information about
            // the failure. This will be null on a successful call.      
            OUT EAP_ERROR** ppEapError
            );


      // Returns an array of attributes that the caller needs to act on.
      // The supplicant will call this when a call to 
      // EapHostAuthenticatorProcessRequestPacket returns EapHostAuthenticatorResponseRespond. 
   DWORD (APIENTRY * EapMethodAuthenticatorGetAttributes) (
         // context handle as returned from a successful call to 
         // EapHostAuthenticatorBeginSession
         IN EAP_SESSION_HANDLE sessionHandle,
         // Array of attributes that the caller needs to act on.
         OUT EapAttributes* pAttribs,
         OUT EAP_ERROR** ppEapError
         );


      // Sets an array of attributes that the caller wants the eap method to act 
      // on. 
   DWORD (APIENTRY * EapMethodAuthenticatorSetAttributes) (
         // context handle as returned from a successful call to 
         // EapHostAuthenticatorBeginSession
         IN EAP_SESSION_HANDLE sessionHandle,
         IN const EapAttributes* const pAttribs,
         // This enumeration tells the supplicant to take an appropriate action.
         // The supplicant will typically look at this action and either call 
         // another method on eaphost or do something else on its own.
         OUT EAP_METHOD_AUTHENTICATOR_RESPONSE_ACTION* pEapOutput,
         // On an unsuccessful call, this will contain any error information about
         // the failure. This will be null on a successful call.      
         OUT EAP_ERROR** ppEapError
         );


      // The authenticator will call this on completion of an authentication. This 
      // can happen in any of the following scenarios:
      // 1. A call to EapHostAuthenticatorReceivePacket returned 
      //    EAP_HOST_AUTHENTICATOR_RESPONSE_SUCCESS or EAP_HOST_AUTHENTICATOR_RESPONSE_FAILURE
      //    Even if the action returned above was a success, the authenticator can choose to call
      //    this method with a failure.
      // 2. The server can choose to terminate an authentication with a failure in the middle of
      //    an authentication.
   DWORD (APIENTRY * EapMethodAuthenticatorGetResult) (
         // context handle as returned from a successful call to 
         // EapHostPeerBeginSession
         IN EAP_SESSION_HANDLE sessionHandle,
         // A structure that indicates the result and any state that the 
         // supplicant needs to save for future authentications.
         OUT EAP_METHOD_AUTHENTICATOR_RESULT* pResult, 
         // On an unsuccessful call, this will contain any error information about
         // the failure. This will be null on a successful call.      
         OUT EAP_ERROR** ppEapError         
         );


      // Ends the authentication session. This cleans up any state that the eap 
      // method or eaphost might be keeping.
   DWORD (APIENTRY * EapMethodAuthenticatorEndSession) (
         // context handle as returned from a successful call to 
         // EapHostPeerBeginSession. This will be set to NULL on a successful call.
         IN EAP_SESSION_HANDLE sessionHandle, 
         // On an unsuccessful call, this will contain any error information about
         // the failure. This will be null on a successful call.      
         OUT EAP_ERROR** ppEapError
      );


   DWORD (APIENTRY * EapMethodAuthenticatorShutdown) (
            IN EAP_METHOD_TYPE* pEapType, 
            OUT EAP_ERROR** ppEapError
            );

} EAP_AUTHENTICATOR_METHOD_ROUTINES, *PEAP_AUTHENTICATOR_METHOD_ROUTINES;


//
// EAP Functions
//
void WINAPI EapMethodAuthenticatorFreeErrorMemory(IN EAP_ERROR* pEapError);
void WINAPI EapMethodAuthenticatorFreeMemory(
        IN void* pUIContextData
        );

DWORD EapMethodAuthenticatorGetInfo(
         IN EAP_METHOD_TYPE* pEapType, 
         OUT EAP_AUTHENTICATOR_METHOD_ROUTINES* pEapInfo, 
         OUT EAP_ERROR** ppEapError
         );

DWORD EapMethodAuthenticatorInitialize(
         IN EAP_METHOD_TYPE* pEapType, 
         OUT EAP_ERROR** ppEapError
         );

DWORD EapMethodAuthenticatorBeginSession(
      // Flags to qualify the authentication process.
      IN DWORD dwFlags,
      // Initial Id
      IN BYTE bInitialId,
      // Identity of the user being authenticated
      IN LPCWSTR pwszIdentity,
      // Pointer to an array of attributes. This array contains attributes that 
      // describe the entity being authenticated. 
      IN const EapAttributes* const pAttributeArray,
      // Specifies the size in bytes of the data pointed to by pConnectionData. 
      // If pConnectionData is NULL, this member is zero. 
      IN DWORD dwSizeofConnectionData,
      // Pointer to connection data received from the authentication protocol's 
      // configuration user interface.
      IN const BYTE* const pConnectionData,
      // This is the maximum size of an eap packet that the authenticator can send.
      IN DWORD dwMaxSendPacketSize,
      // The session handle that identifies the current authentication session.
      OUT EAP_SESSION_HANDLE* pSessionHandle,
      // On an unsuccessful call, this will contain any error information about
      // the failure. This will be null on a successful call.
      OUT EAP_ERROR** ppEapError
      );

DWORD EapMethodAuthenticatorUpdateInnerMethodParams(
         // context handle as returned from a successful call to 
         // EapAuthenticatorBeginSession
         IN EAP_SESSION_HANDLE sessionHandle,
         IN DWORD dwFlags,
         IN CONST WCHAR* pwszIdentity,
         // Pointer to an array of attributes. This array contains attributes that 
         // describe the entity being authenticated. 
         IN const EapAttributes* const pAttributeArray,
         // On an unsuccessful call, this will contain any error information about
         // the failure. This will be null on a successful call.
         OUT EAP_ERROR** ppEapError         
         );


   // The authenticator calls this any time it receives a packet that the eaphost
   // needs to process. This should be called only after a successful call to
   // EapAuthenticatorBeginSession.
DWORD EapMethodAuthenticatorReceivePacket(
         // context handle as returned from a successful call to 
         // EapAuthenticatorBeginSession
         IN EAP_SESSION_HANDLE sessionHandle,
         // Specifies the size, in bytes, of the buffer pointed to by 
         // pReceivePacket
         IN DWORD cbReceivePacket,
         // Pointer to a buffer that contains the incoming EAP data received by 
         // the supplicant.
         IN const EapPacket* const pReceivePacket,
         // This enumeration tells the supplicant to take an appropriate action.
         // The supplicant will typically look at this action and either call 
         // another method on eaphost or do something else on its own.
         OUT EAP_METHOD_AUTHENTICATOR_RESPONSE_ACTION* pEapOutput,
         // On an unsuccessful call, this will contain any error information about
         // the failure. This will be null on a successful call.      
         OUT EAP_ERROR** ppEapError
         );


DWORD EapMethodAuthenticatorSendPacket(
         // context handle as returned from a successful call to 
         // EapHostAuthenticatorBeginSession
         IN EAP_SESSION_HANDLE sessionHandle,
         // Id to use when constructing the SendPacket
         IN BYTE bPacketId,
         // Specifies the limit on the size, in bytes, on the packet generated
         // by eaphost. On a successful return, this will contain the size of the 
         // data added by the eap module.
         IN OUT DWORD* pcbSendPacket,
         // Pointer to a buffer that is allocated by the client and populated
         // by the eap module. The value of the incoming buffer is ignored and
         // the method populates it from the beginning of the buffer.
         OUT EapPacket* pSendPacket,
         // Timeout option for sending the packet
         OUT EAP_AUTHENTICATOR_SEND_TIMEOUT* pTimeout,
         // On an unsuccessful call, this will contain any error information about
         // the failure. This will be null on a successful call.
         OUT EAP_ERROR** ppEapError
         );


   // Returns an array of attributes that the caller needs to act on.
   // The supplicant will call this when a call to 
   // EapHostAuthenticatorProcessRequestPacket returns EapHostAuthenticatorResponseRespond. 
DWORD EapMethodAuthenticatorGetAttributes(
      // context handle as returned from a successful call to 
      // EapHostAuthenticatorBeginSession
      IN EAP_SESSION_HANDLE sessionHandle,
      // Array of attributes that the caller needs to act on.
      OUT EapAttributes* pAttribs,
      OUT EAP_ERROR** ppEapError
      );



   // Sets an array of attributes that the caller wants the eap method to act 
   // on. 
DWORD EapMethodAuthenticatorSetAttributes(
      // context handle as returned from a successful call to 
      // EapHostAuthenticatorBeginSession
      IN EAP_SESSION_HANDLE sessionHandle,
      IN const EapAttributes* const pAttribs,
      // This enumeration tells the supplicant to take an appropriate action.
      // The supplicant will typically look at this action and either call 
      // another method on eaphost or do something else on its own.
      OUT EAP_METHOD_AUTHENTICATOR_RESPONSE_ACTION* pEapOutput,
      // On an unsuccessful call, this will contain any error information about
      // the failure. This will be null on a successful call.      
      OUT EAP_ERROR** ppEapError
      );



   // The authenticator will call this on completion of an authentication. This 
   // can happen in any of the following scenarios:
   // 1. A call to EapHostAuthenticatorReceivePacket returned 
   //    EAP_HOST_AUTHENTICATOR_RESPONSE_SUCCESS or EAP_HOST_AUTHENTICATOR_RESPONSE_FAILURE
   //    Even if the action returned above was a success, the authenticator can choose to call
   //    this method with a failure.
   // 2. The server can choose to terminate an authentication with a failure in the middle of
   //    an authentication.
DWORD EapMethodAuthenticatorGetResult(
      // context handle as returned from a successful call to 
      // EapHostPeerBeginSession
      IN EAP_SESSION_HANDLE sessionHandle,
      // A structure that indicates the result and any state that the 
      // supplicant needs to save for future authentications.
      OUT EAP_METHOD_AUTHENTICATOR_RESULT* pResult, 
      // On an unsuccessful call, this will contain any error information about
      // the failure. This will be null on a successful call.      
      OUT EAP_ERROR** ppEapError         
      );


   // Ends the authentication session. This cleans up any state that the eap 
   // method or eaphost might be keeping.
DWORD EapMethodAuthenticatorEndSession(
      // context handle as returned from a successful call to 
      // EapHostPeerBeginSession. This will be set to NULL on a successful call.
      IN EAP_SESSION_HANDLE sessionHandle, 
      // On an unsuccessful call, this will contain any error information about
      // the failure. This will be null on a successful call.      
      OUT EAP_ERROR** ppEapError
   );


DWORD EapMethodAuthenticatorShutdown(
         IN EAP_METHOD_TYPE* pEapType, 
         OUT EAP_ERROR** ppEapError
         );


/// Config API

#define EAP_METHOD_AUTHENTICATOR_CONFIG_IS_IDENTITY_PRIVACY    0x1

DWORD WINAPI EapMethodAuthenticatorInvokeConfigUI(
                IN EAP_METHOD_TYPE* pEapMethodType,
                IN HWND hwndParent,
                IN DWORD dwFlags,
                IN LPCWSTR pwszMachineName,
                IN DWORD dwSizeOfConfigIn,
                IN BYTE* pConfigIn,
                OUT DWORD* pdwSizeOfConfigOut,
                OUT BYTE** ppConfigOut,
                OUT EAP_ERROR** ppEapError
                );

#ifdef __cplusplus
}
#endif

#endif // EAP_METHOD_AUTHENTICATOR_APIS_H