/*++

Copyright (c) Microsoft Corporation. All rights reserved.

Module Name:

    raseapif.h

Abstract:

    Defines interface between a third party authentication module
    and the Remote Access Service PPP engine.

--*/

#ifndef _RASEAPIF_
#define _RASEAPIF_

#if _MSC_VER > 1000
#pragma once
#endif

#ifdef __cplusplus
extern "C" {
#endif

#if(WINVER >= 0x0500)

//
// Defines used for installtion of EAP DLL
//
// Custom EAP DLL (ex. Name=Sample.dll, Type=(decimal 40) regsitry installation)
//
// HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Rasman\PPP\EAP\40)
//      Path                (REG_EXPAND_SZ) %SystemRoot%\system32\sample.dll
//      ConfigUIPath        (REG_EXPAND_SZ) %SystemRoot%\system32\sample.dll
//      InteractiveUIPath   (REG_EXPAND_SZ) %SystemRoot%\system32\sample.dll
//      IdentityPath        (REG_EXPAND_SZ) %SystemRoot%\system32\sample.dll
//      FriendlyName        (REG_SZ) Sample EAP Protocol
//      RequireConfigUI     (REG_DWORD)     1
//      ConfigCLSID         (REG_SZ)        {0000031A-0000-0000-C000-000000000046}
//      StandaloneSupported (REG_DWORD)     1
//

#define RAS_EAP_REGISTRY_LOCATION   \
    TEXT("System\\CurrentControlSet\\Services\\Rasman\\PPP\\EAP")

#define RAS_EAP_VALUENAME_PATH                  TEXT("Path")
#define RAS_EAP_VALUENAME_CONFIGUI              TEXT("ConfigUIPath")
#define RAS_EAP_VALUENAME_INTERACTIVEUI         TEXT("InteractiveUIPath")
#define RAS_EAP_VALUENAME_IDENTITY              TEXT("IdentityPath")
#define RAS_EAP_VALUENAME_FRIENDLY_NAME         TEXT("FriendlyName")
#define RAS_EAP_VALUENAME_DEFAULT_DATA          TEXT("ConfigData")
#define RAS_EAP_VALUENAME_REQUIRE_CONFIGUI      TEXT("RequireConfigUI")
#define RAS_EAP_VALUENAME_ENCRYPTION            TEXT("MPPEEncryptionSupported")
#define RAS_EAP_VALUENAME_INVOKE_NAMEDLG        TEXT("InvokeUsernameDialog")
#define RAS_EAP_VALUENAME_INVOKE_PWDDLG         TEXT("InvokePasswordDialog")
#define RAS_EAP_VALUENAME_CONFIG_CLSID          TEXT("ConfigCLSID")
#define RAS_EAP_VALUENAME_STANDALONE_SUPPORTED  TEXT("StandaloneSupported")

typedef enum _RAS_AUTH_ATTRIBUTE_TYPE_
{
    raatMinimum = 0,                // Undefined
    raatUserName,                   // Value field is a Pointer
    raatUserPassword,               // Value field is a Pointer
    raatMD5CHAPPassword,            // Value field is a Pointer
    raatNASIPAddress,               // Value field is a 32 bit integral value
    raatNASPort,                    // Value field is a 32 bit integral value
    raatServiceType,                // Value field is a 32 bit integral value
    raatFramedProtocol,             // Value field is a 32 bit integral value
    raatFramedIPAddress,            // Value field is a 32 bit integral value
    raatFramedIPNetmask,            // Value field is a 32 bit integral value
    raatFramedRouting = 10,         // Value field is a 32 bit integral value
    raatFilterId,                   // Value field is a Pointer
    raatFramedMTU,                  // Value field is a 32 bit integral value
    raatFramedCompression,          // Value field is a 32 bit integral value
    raatLoginIPHost,                // Value field is a 32 bit integral value
    raatLoginService,               // Value field is a 32 bit integral value
    raatLoginTCPPort,               // Value field is a 32 bit integral value
    raatUnassigned17,               // Undefined
    raatReplyMessage,               // Value field is a Pointer
    raatCallbackNumber,             // Value field is a Pointer
    raatCallbackId =20,             // Value field is a Pointer
    raatUnassigned21,               // Undefined
    raatFramedRoute,                // Value field is a Pointer
    raatFramedIPXNetwork,           // Value field is a 32 bit integral value
    raatState,                      // Value field is a Pointer
    raatClass,                      // Value field is a Pointer
    raatVendorSpecific,             // Value field is a Pointer
    raatSessionTimeout,             // Value field is a 32 bit integral value
    raatIdleTimeout,                // Value field is a 32 bit integral value
    raatTerminationAction,          // Value field is a 32 bit integral value
    raatCalledStationId = 30,       // Value field is a Pointer
    raatCallingStationId,           // Value field is a Pointer
    raatNASIdentifier,              // Value field is a Pointer
    raatProxyState,                 // Value field is a Pointer
    raatLoginLATService,            // Value field is a Pointer
    raatLoginLATNode,               // Value field is a Pointer
    raatLoginLATGroup,              // Value field is a Pointer
    raatFramedAppleTalkLink,        // Value field is a 32 bit integral value
    raatFramedAppleTalkNetwork,     // Value field is a 32 bit integral value
    raatFramedAppleTalkZone,        // Value field is a Pointer
    raatAcctStatusType = 40,        // Value field is a 32 bit integral value
    raatAcctDelayTime,              // Value field is a 32 bit integral value
    raatAcctInputOctets,            // Value field is a 32 bit integral value
    raatAcctOutputOctets,           // Value field is a 32 bit integral value
    raatAcctSessionId,              // Value field is a Pointer
    raatAcctAuthentic,              // Value field is a 32 bit integral value
    raatAcctSessionTime,            // Value field is a 32 bit integral value
    raatAcctInputPackets,           // Value field is a 32 bit integral value
    raatAcctOutputPackets,          // Value field is a 32 bit integral value
    raatAcctTerminateCause,         // Value field is a 32 bit integral value
    raatAcctMultiSessionId = 50,    // Value field is a Pointer
    raatAcctLinkCount,              // Value field is a 32 bit integral value
    raatAcctEventTimeStamp = 55,    // Value field is a 32 bit integral value
    raatMD5CHAPChallenge = 60,      // Value field is a Pointer
    raatNASPortType,                // Value field is a 32 bit integral value
    raatPortLimit,                  // Value field is a 32 bit integral value
    raatLoginLATPort,               // Value field is a Pointer
    raatTunnelType,                 // Value field is a 32 bit integral value
    raatTunnelMediumType,           // Value field is a 32 bit integral value
    raatTunnelClientEndpoint,       // Value field is a Pointer
    raatTunnelServerEndpoint,       // Value field is a Pointer
    raatARAPPassword = 70,          // Value field is a Pointer
    raatARAPFeatures,               // Value field is a Pointer
    raatARAPZoneAccess,             // Value field is a 32 bit integral value
    raatARAPSecurity,               // Value field is a 32 bit integral value
    raatARAPSecurityData,           // Value field is a Pointer
    raatPasswordRetry,              // Value field is a 32 bit integral value
    raatPrompt,                     // Value field is a 32 bit integral value
    raatConnectInfo,                // Value field is a Pointer
    raatConfigurationToken,         // Value field is a Pointer
    raatEAPMessage,                 // Value field is a Pointer
    raatSignature = 80,             // Value field is a Pointer
    raatARAPChallengeResponse = 84, // Value field is a Pointer
    raatAcctInterimInterval = 85,   // Value field is a 32 bit integral value
    raatARAPGuestLogon = 8096,      // Value field is a 32 bit integral value
    raatCertificateEKU,             // Value field is a Pointer
    raatReserved = 0xFFFFFFFF       // Undefined

}RAS_AUTH_ATTRIBUTE_TYPE;


//
// VSA attribute ids for ARAP
//
#define  raatARAPChallenge              33
#define  raatARAPOldPassword            19
#define  raatARAPNewPassword            20
#define  raatARAPPasswordChangeReason   21

//
// Value is set to the 32 bit integral value or a pointer to data.
// 32 bit integral values should be in host format, not network format.
// Length for a 32 bit integral value can be 1, 2 or 4. The array of
// attributes must be terminated with an attribute of type raatMinimum.
//

typedef struct _RAS_AUTH_ATTRIBUTE
{
    RAS_AUTH_ATTRIBUTE_TYPE raaType;
    DWORD                   dwLength;
    PVOID                   Value;

}RAS_AUTH_ATTRIBUTE, *PRAS_AUTH_ATTRIBUTE;

//
// EAP packet codes from EAP spec.
//

#define EAPCODE_Request         1
#define EAPCODE_Response        2
#define EAPCODE_Success         3
#define EAPCODE_Failure         4

#define MAXEAPCODE              4

//
// Values of the fFlags field in PPP_EAP_INPUT
// These have the same values as the RASEAPF_ flags in ras.h
//

#define RAS_EAP_FLAG_ROUTER             0x00000001  // This is a router
#define RAS_EAP_FLAG_NON_INTERACTIVE    0x00000002  // No UI should be displayed
#define RAS_EAP_FLAG_LOGON              0x00000004  // The user data was
                                                    // obtained from Winlogon
#define RAS_EAP_FLAG_PREVIEW            0x00000008  // User has checked
                                                    // "Prompt for information
                                                    // before dialing"
#define RAS_EAP_FLAG_FIRST_LINK         0x00000010  // This is the first link
#define RAS_EAP_FLAG_MACHINE_AUTH       0x00000020  // Use the default machine cert
                                                    // or user cert based on the
                                                    // application logon context


typedef struct _PPP_EAP_PACKET
{
    BYTE    Code;       // 1-Request, 2-Response, 3-Success, 4-Failure

    BYTE    Id;         // Id of this packet

    BYTE    Length[2];  // Length of this packet

    BYTE    Data[1];    // Data - First byte is Type for Request/Response

}PPP_EAP_PACKET, *PPPP_EAP_PACKET;

#define PPP_EAP_PACKET_HDR_LEN  ( sizeof( PPP_EAP_PACKET ) - 1 )

//
// Interface structure between the engine and APs. This is passed to the
// AP's via the RasCpBegin call.
//

typedef struct _PPP_EAP_INPUT
{
    //
    // Size of this structure
    //

    DWORD       dwSizeInBytes;

    //
    // The following five fields are valid only in RasEapBegin call
    //

    DWORD       fFlags;         // See RAS_EAP_FLAG_*

    BOOL        fAuthenticator; // Act as authenticator or authenticatee

    WCHAR *     pwszIdentity;   // Users's identity

    WCHAR *     pwszPassword;   // Client's account password. Only valid when
                                // fAuthenticator is FALSE.

    BYTE        bInitialId;     // Initial packet identifier. Must be used for
                                // the first EAP packet sent by the DLL and
                                // incremented by one for each subsequent
                                // request packet.

    //
    // During the RasEapBegin call on the authenticator side, pUserAttributes
    // contains the set of attributes for the currently dialed in user, e.g.,
    // the port used, NAS IP Address, etc.
    //
    // When the fAuthenticationComplete flag is TRUE, pUserAttributes contains
    // attributes (if any) returned by the authentication provider.
    //
    // This memory is not owned by the EAP DLL and should be treated as
    // read-only.
    //

    RAS_AUTH_ATTRIBUTE * pUserAttributes;

    //
    // The next two fields are used only if the EAP DLL is using the
    // currently configured authentication provider ex: RADIUS or Windows NT
    // domain authentication, and the fAuthenticator field above is set to
    // TRUE.
    //

    //
    // Indicates that the authenticator has completed authentication.
    // Ignore this field if an authentication provider is not being used.
    //

    BOOL                fAuthenticationComplete;

    //
    // Result of the authentication process by the authentication provider.
    // NO_ERROR indicates success, otherwise it is a value from winerror.h,
    // raserror.h or mprerror.h indicating failure reason.
    //

    DWORD               dwAuthResultCode;

    //
    // Valid only on the authenticatee side. This may be used on the
    // authenticatee side to impersonate the user being authenticated.
    //

    OPTIONAL HANDLE     hTokenImpersonateUser;

    //
    // This variable should be examined only by the authenticatee side.
    // The EAP specification states that the success packet may be lost and
    // since it is a non-acknowledged packet, reception of an NCP packet should
    // be interpreted as a success packet. This varable is set to TRUE in this
    // case only on the authenticatee side
    //

    BOOL                fSuccessPacketReceived;

    //
    // Will be set to TRUE only when the user dismissed the interactive
    // UI that was invoked by the EAP dll
    //

    BOOL                fDataReceivedFromInteractiveUI;

    //
    // Data received from the Interactive UI. Will be set to
    // non-NULL when fDataReceivedFromInteractiveUI is set to TRUE and
    // RasEapInvokeInteractiveUI returned non-NULL data. This buffer will be
    // freed by the PPP engine on return from the RasEapMakeMessage call. A
    // copy of this data should be made in the EAP Dll's memory space.
    //

    OPTIONAL PBYTE      pDataFromInteractiveUI;

    //
    // Size in bytes of data pointed to by pInteractiveConnectionData. This may
    // be 0 if there was no data passed back by RasEapInvokeInteractiveUI.
    //

    DWORD               dwSizeOfDataFromInteractiveUI;

    //
    // Connection data received from the Config UI. Will be set to non-NULL
    // when the RasEapBegin call is made and the RasEapInvokeConfigUI
    // returned non-NULL data. This buffer will be freed by the PPP engine
    // on return from the RasEapBegin call. A copy of this data should
    // be made in the EAP Dll's memory space.
    //

    OPTIONAL PBYTE      pConnectionData;

    //
    // Size in bytes of data pointed to by pConnectionData. This may be
    // 0 if there was no data passed back by the RasEapInvokeConfigUI call.
    //

    DWORD               dwSizeOfConnectionData;

    //
    // User data received from the Identity UI or Interactive UI. Will be set
    // to non-NULL when the RasEapBegin call is made if such data exists.
    // This buffer will be freed by the PPP engine on return from the
    // RasEapBegin call. A copy of this data should be made in the EAP Dll's
    // memory space.
    //

    OPTIONAL PBYTE      pUserData;

    //
    // Size in bytes of data pointed to by pUserData. This may be 0 if there
    // is no data.
    //

    DWORD               dwSizeOfUserData;

    //
    // Reserved.
    //

    HANDLE              hReserved;

}PPP_EAP_INPUT, *PPPP_EAP_INPUT;

typedef enum _PPP_EAP_ACTION
{
    //
    // These actions are provided by the EAP DLL as output from the
    // RasEapMakeMessage API.  They tell the PPP engine what action (if any) to
    // take on the EAP DLL's behalf, and eventually inform the engine that the
    // EAP DLL has finished authentication.
    //

    EAPACTION_NoAction,     // Be passive, i.e. listen without timeout (default)
    EAPACTION_Authenticate, // Invoke the back-end authenticator.
    EAPACTION_Done,         // End auth session, dwAuthResultCode is set
    EAPACTION_SendAndDone,  // As above but send message without timeout first
    EAPACTION_Send,         // Send message, don't timeout waiting for reply
    EAPACTION_SendWithTimeout, // Send message, timeout if reply not received
    EAPACTION_SendWithTimeoutInteractive  // As above, but don't increment
                                          // retry count

}PPP_EAP_ACTION;

typedef struct _PPP_EAP_OUTPUT
{
    //
    // Size of this structure
    //

    DWORD                   dwSizeInBytes;

    //
    // Action that the PPP engine should take
    //

    PPP_EAP_ACTION          Action;

    //
    // dwAuthResultCode is valid only with an Action code of Done or
    // SendAndDone. Zero value indicates succesful authentication.
    // Non-zero indicates unsuccessful authentication with the value
    // indicating the reason for authentication failure.
    // Non-zero return codes should be only from winerror.h, raserror.h and
    // mprerror.h
    //

    DWORD                   dwAuthResultCode;

    //
    // When Action is EAPACTION_Authenticate, pUserAttributes may contain
    // additional attributes necessary to authenticate the user, e.g.,
    // User-Password. If no credentials are presented, the back-end
    // authenticator will assume the user is authentic and only retrieve
    // authorizations.
    //
    // When Action is EAPACTION_Done, EAPACTION_SendAndDone, or EAPACTION_Send,
    // pUserAttributes may contain additional attributes for the user. These
    // attributes will overwrite any attributes of the same type returned by
    // the back-end authenticator.
    //
    // It is up to the EAP DLL to free this memory in RasEapEnd call.
    //

    OPTIONAL RAS_AUTH_ATTRIBUTE * pUserAttributes;
    //
    // Flag set to true will cause the RasEapInvokeInteractiveUI call to be
    // made.
    //

    BOOL                    fInvokeInteractiveUI;

    //
    // Pointer to context data, if any, to be sent to the UI. The EAP dll
    // is responsible for freeing this buffer in the RasEapEnd call or when
    // a response from the user for this invocation is obtained.
    //

    OPTIONAL PBYTE          pUIContextData;

    //
    // Size in bytes of the data pointed to by pUIContextData. Ignored if
    // pUIContextData is NULL
    //

    DWORD                   dwSizeOfUIContextData;

    //
    // When set to TRUE, indicates that the information pointed to by
    // pConnectionData should be saved in the phonebook. Only valid on
    // the authenticatee side.
    //

    BOOL                    fSaveConnectionData;

    //
    // If fSaveConnectionData above is true, the data pointed to by
    // pConnectionData will be saved in the phonebook. This data
    // must be freed by the DLL when the RasEapEnd call is made.
    //

    OPTIONAL PBYTE          pConnectionData;

    //
    // Size, in bytes, of the data pointed to by pConnectionData
    //

    DWORD                   dwSizeOfConnectionData;

    //
    // When set to TRUE, indicates that the information pointed to by
    // pUserData should be saved in the registry for this user. Only valid
    // on the authenticatee side.
    //

    BOOL                    fSaveUserData;

    //
    // If fSaveUserData above is true, the data pointed to by pUserData will be
    // saved in the registry for this user. This data must be freed by the DLL
    // when the RasEapEnd call is made.
    //

    OPTIONAL PBYTE          pUserData;

    //
    // Size, in bytes, of the data pointed to by pUserData
    //

    DWORD                   dwSizeOfUserData;

}PPP_EAP_OUTPUT, *PPPP_EAP_OUTPUT;

typedef struct _PPP_EAP_INFO
{
    //
    // Size of this structure
    //

    DWORD   dwSizeInBytes;

    DWORD   dwEapTypeId;

    //
    // Called to initialize/uninitialize this module. This will be called before
    // any other call is made. fInitialize will be TRUE iff the module has to be
    // initialized. Must return errorcodes only from winerror.h, raserror.h or
    // mprerror.h
    //

    DWORD   (APIENTRY *RasEapInitialize)(   IN  BOOL        fInitialize );

    //
    // Called to get a context buffer for this EAP session and pass
    // initialization information. This will be called before any other
    // call is made, except RasEapInitialize. Must return errorcodes only from
    // winerror.h, raserror.h or mprerror.h
    //

    DWORD   (APIENTRY *RasEapBegin)( OUT VOID **             ppWorkBuffer,
                                     IN  PPP_EAP_INPUT *     pPppEapInput );

    //
    // Called to free the context buffer for this EAP session.
    // Called after this session is completed successfully or not, provided
    // the RasEapBegin call for this EAP session returned successfully.
    // Must return errorcodes only from winerror.h, raserror.h or mprerror.h
    //

    DWORD   (APIENTRY *RasEapEnd)(   IN  VOID *     pWorkBuffer );

    //
    // Called to process an incomming packet and/or send a packet.
    // cbSendPacket is the size in bytes of the buffer pointed to by
    // pSendPacket. Must return errorcodes only from winerror.h, raserror.h or
    // mprerror.h. Error return code indicates an error occurance during the
    // authentication process.
    //

    DWORD   (APIENTRY *RasEapMakeMessage)(
                            IN  VOID*               pWorkBuf,
                            IN  PPP_EAP_PACKET*     pReceivePacket,
                            OUT PPP_EAP_PACKET*     pSendPacket,
                            IN  DWORD               cbSendPacket,
                            OUT PPP_EAP_OUTPUT*     pEapOutput,
                            IN  PPP_EAP_INPUT*      pEapInput );

}PPP_EAP_INFO, *PPPP_EAP_INFO;

//
// RasEapGetInfo should be exported by the 3rd party EAP dll installed in the
// registry via the Path value.
//

DWORD APIENTRY
RasEapGetInfo(
    IN  DWORD           dwEapTypeId,
    OUT PPP_EAP_INFO*   pEapInfo
);

//
// RasEapFreeMemory should be exported by the 3rd party EAP dlls installed in
// the registry via the InteractiveUIPath, ConfigUIPath, and IdentityPath
// values.
//

DWORD APIENTRY
RasEapFreeMemory(
    IN  BYTE*           pMemory
);

//
// RasEapInvokeInteractiveUI and RasEapFreeMemory should be exported by the
// 3rd party EAP dll installed in the registry via the InteractiveUIPath
// value.
//

DWORD APIENTRY
RasEapInvokeInteractiveUI(
    IN  DWORD           dwEapTypeId,
    IN  HWND            hwndParent,
    IN  BYTE*           pUIContextData,
    IN  DWORD           dwSizeOfUIContextData,
    OUT BYTE**          ppDataFromInteractiveUI,
    OUT DWORD*          pdwSizeOfDataFromInteractiveUI
);

//
// RasEapInvokeConfigUI and RasEapFreeMemory should be exported by the
// 3rd party EAP dll installed in the registry via the ConfigUIPath value.
//

DWORD APIENTRY
RasEapInvokeConfigUI(
    IN  DWORD           dwEapTypeId,
    IN  HWND            hwndParent,
    IN  DWORD           dwFlags,
    IN  BYTE*           pConnectionDataIn,
    IN  DWORD           dwSizeOfConnectionDataIn,
    OUT BYTE**          ppConnectionDataOut,
    OUT DWORD*          pdwSizeOfConnectionDataOut
);

//
// RasEapGetIdentity and RasEapFreeMemory should be exported by the
// 3rd party EAP dll installed in the registry via the IdentityPath value.
//

DWORD APIENTRY
RasEapGetIdentity(
    IN  DWORD           dwEapTypeId,
    IN  HWND            hwndParent,
    IN  DWORD           dwFlags,
    IN  const WCHAR*    pwszPhonebook,
    IN  const WCHAR*    pwszEntry,
    IN  BYTE*           pConnectionDataIn,
    IN  DWORD           dwSizeOfConnectionDataIn,
    IN  BYTE*           pUserDataIn,
    IN  DWORD           dwSizeOfUserDataIn,
    OUT BYTE**          ppUserDataOut,
    OUT DWORD*          pdwSizeOfUserDataOut,
    OUT WCHAR**         ppwszIdentity
);

#endif /* WINVER >= 0x0500 */

#ifdef __cplusplus
}
#endif

#endif // _RASEAPIF_

