windows-server-2003/ds/security/protocols/kerberos/client2/credman.cxx

//+-----------------------------------------------------------------------
//
// Microsoft Windows
//
// Copyright (c) Microsoft Corporation 2000
//
// File:        credman.cxx
//
// Contents:    Code for credentials APIs for the Kerberos package
//
//
// History:     23-Feb-2000   Created         Jeffspel
//
//------------------------------------------------------------------------


#include <kerb.hxx>
#include <kerbp.h>


#if DBG
static TCHAR THIS_FILE[]=TEXT(__FILE__);
#endif

extern "C"
{
#include <des.h>
}


//+-------------------------------------------------------------------------
//
//  Function:   KerbFreeCredmanCred
//
//  Synopsis:   Frees credman cred
//
//  Arguments:
//
//  Requires:
//
//  Returns:    NTSTATUS, typically ignored, as failure to update the credman
//              should not be fatal.
//
//  Notes:
//
//
//--------------------------------------------------------------------------
VOID
KerbFreeCredmanCred(
    IN PKERB_CREDMAN_CRED CredToFree
    )
{
    DsysAssert(CredToFree);
    KerbFreePrimaryCredentials(CredToFree->SuppliedCredentials, TRUE);
    KerbFreeString(&CredToFree->CredmanDomainName);
    KerbFreeString(&CredToFree->CredmanUserName);
    KerbFree(CredToFree);
}


//+-------------------------------------------------------------------------
//
//  Function:   KerbReferenceCredmanCred
//
//  Synopsis:   Frees credman cred
//
//  Arguments:
//
//  Requires:
//
//
//  Notes:
//
//
//--------------------------------------------------------------------------
VOID
KerbReferenceCredmanCred(
    IN PKERB_CREDMAN_CRED Cred,
    IN PKERB_LOGON_SESSION LogonSession,
    IN BOOLEAN Unlink
    )
{

    KerbReferenceListEntry(
            &LogonSession->CredmanCredentials,
            &Cred->ListEntry,
            Unlink
            );
}


//+-------------------------------------------------------------------------
//
//  Function:   KerbDereferenceCredmanCred
//
//  Synopsis:   Frees credman cred
//
//  Arguments:
//
//  Requires:
//
//  Returns:    NTSTATUS, typically ignored, as failure to update the credman
//              should not be fatal.
//
//  Notes:
//
//
//--------------------------------------------------------------------------
VOID
KerbDereferenceCredmanCred(
    IN PKERB_CREDMAN_CRED Cred,
    IN PKERBEROS_LIST CredmanList
    )
{

    if (KerbDereferenceListEntry(
            &Cred->ListEntry,
            CredmanList
            ))
    {
        KerbFreeCredmanCred(Cred);
    }

}


//+-------------------------------------------------------------------------
//
//  Function:   KerbFreeCredmanList
//
//  Synopsis:   Free a credman list from a logon session...
//
//  Arguments:
//
//  Requires:
//
//  Returns:    NTSTATUS, typically ignored, as failure to update the credman
//              should not be fatal.
//
//  Notes:
//
//
//--------------------------------------------------------------------------
VOID
KerbFreeCredmanList(
    KERBEROS_LIST CredmanList
    )
{
    PKERB_CREDMAN_CRED Cred;
    KerbLockList(&CredmanList);

    //
    // Go through the list of credman creds and dereferences them all
    //

    while (!IsListEmpty(&CredmanList.List))
    {

        Cred = CONTAINING_RECORD(
                    CredmanList.List.Flink,
                    KERB_CREDMAN_CRED,
                    ListEntry.Next
                    );


        // unlink cred from list
        KerbReferenceListEntry(
            &CredmanList,
            &Cred->ListEntry,
            TRUE
            );

        KerbDereferenceCredmanCred(
                Cred,
                &CredmanList
                );

    }

    SafeDeleteCriticalSection(&CredmanList.Lock);
}

//+-------------------------------------------------------------------------
//
//  Function:   KerbNotifyCredentialManager
//
//  Synopsis:   This function is used to notify the credential manager of a
//              password change event.   Note:  This will always be a MIT
//              session.
//
//  Arguments:
//
//  Requires:
//
//  Returns:    NTSTATUS, typically ignored, as failure to update the credman
//              should not be fatal.
//
//  Notes:
//
//
//--------------------------------------------------------------------------
VOID
KerbNotifyCredentialManager(
    IN PKERB_LOGON_SESSION LogonSession,
    IN PKERB_CHANGEPASSWORD_REQUEST ChangeRequest,
    IN PKERB_INTERNAL_NAME ClientName,
    IN PUNICODE_STRING RealmName
    )
{

    UNICODE_STRING ClientNameU = {0};
    KERBERR KerbErr;

    // FESTER:
    // We should only expect to get pwd change notification on
    // an MIT Realm pwd change, in which case, there isn't a concept of a
    // Netbios name ....

    KerbErr = KerbConvertKdcNameToString(
                    &ClientNameU,
                    ClientName,
                    NULL
                    );

    if (!KERB_SUCCESS(KerbErr))
    {
        return;
    }


    LsaINotifyPasswordChanged(
        NULL,
        &ClientNameU,
        RealmName,
        NULL,
        &ChangeRequest->OldPassword,
        &ChangeRequest->NewPassword,
        ChangeRequest->Impersonating
        );

    KerbFreeString(&ClientNameU);

}





//+-------------------------------------------------------------------------
//
//  Function:   KerbComparePasswords
//
//  Synopsis:   Verifies that two stored credentials are identical, simply
//              through comparison of KERB_ETYPE_RC4_HMAC_NT keys
//
//  Arguments:
//
//  Requires:
//
//  Returns:
//           NULL if the user name is not a marshalled cert, a pointer
//           to the
//
//  Notes:
//
//
//--------------------------------------------------------------------------

BOOL
KerbComparePasswords(
    IN PKERB_STORED_CREDENTIAL PwdList1,
    IN PKERB_STORED_CREDENTIAL PwdList2
    )
{

    PKERB_ENCRYPTION_KEY Key1 = NULL;
    PKERB_ENCRYPTION_KEY Key2 = NULL;
    ULONG Etype = KERB_ETYPE_RC4_HMAC_NT;

    Key1 = KerbGetKeyFromList(
            PwdList1,
            KERB_ETYPE_RC4_HMAC_NT
            );

    if (NULL == Key1)
    {
        Etype = KERB_ETYPE_DES_CBC_MD5;
       
        Key1 = KerbGetKeyFromList(
                    PwdList1,
                    Etype
                    );                 

        if (NULL == Key1)
        {
            D_DebugLog((DEB_ERROR, "Cred1 missing DES and RC4 key!\n"));
            DsysAssert(FALSE);
            return FALSE;
        }  
    }

    Key2 = KerbGetKeyFromList(
            PwdList2,
            Etype
            );

    if (NULL == Key2)
    {
        D_DebugLog((DEB_ERROR, "Cred2 missing %x key!\n", Etype));
        DsysAssert(FALSE);
        return FALSE;
    }

    return (RtlEqualMemory(
                Key1->keyvalue.value,
                Key2->keyvalue.value,
                Key1->keyvalue.length
                ));

}


//+-------------------------------------------------------------------------
//
//  Function:   KerbLogCredmanError
//
//  Synopsis:   Create an event log entry to help the user fixup their
//              credman credential.
//
//  Arguments:
//
//  Requires:
//
//  Returns:
//           NULL if the user name is not a marshalled cert, a pointer
//           to the
//
//  Notes:
//
//
//--------------------------------------------------------------------------
VOID
KerbLogCredmanError(
    IN PKERB_CREDMAN_CRED Cred,
    IN NTSTATUS Status
    )
{
    
    BOOLEAN CardError = FALSE;
    BOOLEAN Pkinit = (Cred->SuppliedCredentials->PublicKeyCreds != NULL);
    
    switch ( Status )
    {
    case STATUS_SMARTCARD_CARD_NOT_AUTHENTICATED:
    case STATUS_SMARTCARD_SUBSYSTEM_FAILURE:
    case STATUS_SMARTCARD_SILENT_CONTEXT:
        CardError = TRUE;
    case STATUS_NO_SUCH_USER:
    case STATUS_SMARTCARD_WRONG_PIN:
    case STATUS_WRONG_PASSWORD:
        break;
    default:
        return;
    } 
    

    //
    // If this is a *Session, e.g. RAS connection, and we have a card error, 
    // ask the user to reconnect.
    //
    if ((( Cred->CredentialFlags & RAS_CREDENTIAL ) != 0) &&
        ( CardError ))
    {
        KerbReportRasCardError(Status);
        return;
    }      

    KerbReportCredmanError(
         &Cred->SuppliedCredentials->UserName,
         &Cred->SuppliedCredentials->DomainName,
         Pkinit,
         Status
         );


}

//+-------------------------------------------------------------------------
//
//  Function:   KerbCheckUserNameForCert
//
//  Synopsis:   Looks at the passed in user name and determines if that
//              user name is a marshalled cert.  If it is the function
//              opens the user cert store and then attempts to find the
//              cert in the store.
//
//  Arguments:
//
//  Requires:
//
//  Returns:
//           NULL if the user name is not a marshalled cert, a pointer
//           to the
//
//  Notes:
//
//
//--------------------------------------------------------------------------

NTSTATUS
KerbCheckUserNameForCert(
    IN PLUID ClientLogonId,
    IN BOOLEAN fImpersonateClient,
    IN UNICODE_STRING *pUserName,
    OUT PCERT_CONTEXT *ppCertContext
    )
{
    CRED_MARSHAL_TYPE MarshalType;
    PCERT_CREDENTIAL_INFO pCertCredInfo = NULL;
    HCERTSTORE hCertStore = NULL;
    CRYPT_HASH_BLOB HashBlob;
    LPWSTR rgwszUserName;
    WCHAR FastUserName[(UNLEN + 1) * sizeof(WCHAR)];
    LPWSTR SlowUserName = NULL;
    BOOLEAN fImpersonating = FALSE;
    HANDLE ClientTokenHandle = NULL;
    NTSTATUS Status = STATUS_SUCCESS;

    *ppCertContext = NULL;

    // Switch to stackalloc routine when available.
    if( pUserName->Length+sizeof(WCHAR) <= sizeof(FastUserName) )
    {
        rgwszUserName = FastUserName;
    }
    else
    {
        SafeAllocaAllocate(SlowUserName, pUserName->Length+sizeof(WCHAR));

        if( SlowUserName == NULL )
        {
            Status = STATUS_INSUFFICIENT_RESOURCES;
            goto Cleanup;
        }
        rgwszUserName = SlowUserName;
    }


    RtlCopyMemory(
        rgwszUserName,
        pUserName->Buffer,
        pUserName->Length);
    rgwszUserName[pUserName->Length / sizeof(WCHAR)] = L'\0';


    //
    // unmarshall the cert cred info from the user name field
    // of the cred man cred
    //
    if (!CredUnmarshalCredentialW(
            rgwszUserName,
            &MarshalType,
            (void**)&pCertCredInfo
            ))
    {
        goto Cleanup;
    }
    if (CertCredential != MarshalType)
    {
        goto Cleanup;
    }

    // first need to impersonate the user so that we can call the
    // credential manager as that user
    // TODO: check if this fails.
    // don't do this until new ImpersonateLuid() is available.
    //
    if (NULL == ClientLogonId)
    {
        if (fImpersonateClient)
        {
            Status = LsaFunctions->ImpersonateClient();

            if (!NT_SUCCESS (Status))
            {
                goto Cleanup;
            }
        }
        else
        {
            goto Cleanup;
        }
    }
    else
    {
        Status = LsaFunctions->OpenTokenByLogonId(
                                    ClientLogonId,
                                    &ClientTokenHandle
                                    );
        if (!NT_SUCCESS(Status))
        {
            D_DebugLog((DEB_ERROR,"Unable to get the client token handle.\n"));
            goto Cleanup;
        }

        if(!SetThreadToken(NULL, ClientTokenHandle))
        {
            D_DebugLog((DEB_ERROR,"Unable to impersonate the client token handle.\n"));
            Status = STATUS_CANNOT_IMPERSONATE;
            goto Cleanup;
        }
    }

    fImpersonating = TRUE;

    // open a cert store if necessary
    if (NULL == hCertStore)
    {
        hCertStore = CertOpenStore(
                        CERT_STORE_PROV_SYSTEM_W,
                        0,
                        0,
                        CERT_SYSTEM_STORE_CURRENT_USER,
                        L"MY");
        if (NULL == hCertStore)
        {
            Status = SEC_E_NO_CREDENTIALS;
            D_DebugLog((DEB_ERROR,"Failed to open the user cert store even though a cert cred was found.\n"));
            goto Cleanup;
        }
    }

    // find the cert in the store which meets this hash
    HashBlob.cbData = sizeof(pCertCredInfo->rgbHashOfCert);
    HashBlob.pbData = pCertCredInfo->rgbHashOfCert;
    *ppCertContext = (PCERT_CONTEXT)CertFindCertificateInStore(
                                        hCertStore,
                                        X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
                                        0,
                                        CERT_FIND_HASH,
                                        &HashBlob,
                                        NULL);

    if (NULL == *ppCertContext)
    {
        Status = SEC_E_NO_CREDENTIALS;
        D_DebugLog((DEB_ERROR,"Failed to find cert in store even though a cert cred was found.\n"));
        goto Cleanup;
    }

Cleanup:
    if (NULL != hCertStore)
    {
        CertCloseStore(hCertStore, 0);
    }

    if (fImpersonating)
    {
        RevertToSelf();
    }

    if (NULL != pCertCredInfo)
    {
        CredFree (pCertCredInfo);
    }

    if(ClientTokenHandle != NULL)
    {
        CloseHandle( ClientTokenHandle );
    }

    SafeAllocaFree(SlowUserName);

    return Status;
}


// check username for domain/ or @ format
NTSTATUS
CredpParseUserName(
    IN OUT LPWSTR ParseName,
    OUT PUNICODE_STRING pUserName,
    OUT PUNICODE_STRING pDomainName
    )

/*++

Routine Description:

    This routine separates a passed in user name into domain and username.  A user name must have one
    of the following two syntaxes:

        <DomainName>\<UserName>
        <UserName>@<DnsDomainName>

    The name is considered to have the first syntax if the string contains an \.
    A string containing a @ is ambiguous since <UserName> may contain an @.

    For the second syntax, the last @ in the string is used since <UserName> may
    contain an @ but <DnsDomainName> cannot.

    NOTE - The function does not allocate the UNICODE_STRING buffers
    so these should not be freed (RtlInitUnicodeString is used)

Arguments:

    ParseName - Name of user to validate - will be modified

    pUserName - Returned pointing to canonical name inside of ParseName

    pDomainName - Returned pointing to domain name inside of ParseName


Return Values:

    The following status codes may be returned:

        STATUS_INVALID_ACCOUNT_NAME - The user name is not valid.

--*/

{
    NTSTATUS Status;

    LPWSTR SlashPointer;
    LPWSTR AtPointer;

    LPWSTR pTmpUserName = NULL;
    LPWSTR pTmpDomainName = NULL;

    //
    // NULL is invalid
    //

    if ( ParseName == NULL ) {
        Status = STATUS_INVALID_ACCOUNT_NAME;
        goto Cleanup;
    }

    //
    // Classify the input account name.
    //
    // The name is considered to be <DomainName>\<UserName> if the string
    // contains an \.
    //

    SlashPointer = wcsrchr( ParseName, L'\\' );

    if ( SlashPointer != NULL )
    {
        //
        // point the output strings
        //

        pTmpDomainName = ParseName;

        //
        // Skip the backslash
        //

        *SlashPointer = L'\0';
        SlashPointer ++;

        pTmpUserName = SlashPointer;
    //
    // Otherwise the name must be a UPN
    //
    }
    else
    {
        //
        // A UPN has the syntax <AccountName>@<DnsDomainName>.
        // If there are multiple @ signs,
        //  use the last one since an AccountName can have an @ in it.
        //
        //

        AtPointer = wcsrchr( ParseName, L'@' );
        if ( AtPointer == NULL )
        {
            // must be just <username>
            pTmpUserName = ParseName;
        }
        else
        {
            pTmpUserName = ParseName;
            *AtPointer = L'\0';
            AtPointer ++;

            pTmpDomainName = AtPointer;
        }
    }

    RtlInitUnicodeString( pUserName, pTmpUserName );
    RtlInitUnicodeString( pDomainName, pTmpDomainName );

    Status = STATUS_SUCCESS;

    //
    // Cleanup
    //
Cleanup:

    return Status;

}

NTSTATUS
CredpExtractMarshalledTargetInfo(
    IN  PUNICODE_STRING TargetServerName,
    OUT CREDENTIAL_TARGET_INFORMATIONW **pTargetInfo
    )
{
    NTSTATUS Status;

    //
    // LSA will set Length to include only the non-marshalled portion,
    // with MaximumLength trailing data to include marshalled portion.
    //

    if( (TargetServerName == NULL) ||
        (TargetServerName->Buffer == NULL) ||
        (TargetServerName->Length >= TargetServerName->MaximumLength) ||
        ((TargetServerName->MaximumLength - TargetServerName->Length) < CRED_MARSHALED_TI_SIZE_SIZE )
        )
    {
        return STATUS_SUCCESS;
    }

    //
    // Unmarshal the target info
    //

    Status = CredUnmarshalTargetInfo (
                    TargetServerName->Buffer,
                    TargetServerName->MaximumLength,
                    pTargetInfo,
                    NULL );

    if( !NT_SUCCESS(Status) )
    {
        if( Status == STATUS_INVALID_PARAMETER )
        {
            Status = STATUS_SUCCESS;
        }
    }

    return Status ;
}

//+-------------------------------------------------------------------------
//
//  Function:   KerbCheckForPKINITEnhKeyUsage
//
//  Synopsis:   Checks if the passed in cert context contains the
//              PKINIT enhanced key usage.
//
//  Arguments:  pCertContext - cert context to check for enh key usage
//
//  Requires:
//
//  Returns:    TRUE is success, FALSE is failure
//
//  Notes:
//
//
//--------------------------------------------------------------------------


BOOL
KerbCheckForPKINITEnhKeyUsage(
    IN PCERT_CONTEXT pCertContext
    )
{
    LPSTR pszClientAuthUsage = KERB_PKINIT_CLIENT_CERT_TYPE;
    PCERT_ENHKEY_USAGE pEnhKeyUsage = NULL;
    ULONG cbEnhKeyUsage = 0;
    ULONG i;
    BOOLEAN fRet = FALSE;

    if ( pCertContext == NULL )
    {
        return FALSE;
    }

    if (!CertGetEnhancedKeyUsage(
            pCertContext,
            CERT_FIND_EXT_ONLY_ENHKEY_USAGE_FLAG,
            NULL,
            &cbEnhKeyUsage))
    {
        goto Cleanup;
    }

    //
    // Allocate space for the key usage structure
    //

    SafeAllocaAllocate(pEnhKeyUsage, cbEnhKeyUsage);

    if (NULL == pEnhKeyUsage)
    {
        goto Cleanup;
    }

    if (!CertGetEnhancedKeyUsage(
            pCertContext,
            CERT_FIND_EXT_ONLY_ENHKEY_USAGE_FLAG,
            pEnhKeyUsage,
            &cbEnhKeyUsage))
    {
        goto Cleanup;
    }

    //
    // Enumerate through the enh key usages looking for the PKINIT one
    //

    for (i=0;i<pEnhKeyUsage->cUsageIdentifier;i++)
    {
        if (0 == strcmp(pszClientAuthUsage, pEnhKeyUsage->rgpszUsageIdentifier[i]))
        {
            fRet = TRUE;
            goto Cleanup;
        }
    }

Cleanup:

    SafeAllocaFree(pEnhKeyUsage);

    return fRet;
}


//+-------------------------------------------------------------------------
//
//  Function:   KerbAddCertCredToPrimaryCredential
//
//  Synopsis:   Adds cert context and Pin info to the kerb credential
//              structure.
//
//  Arguments:  pCertContext - logon session
//              pCertCredInfo - cert cred manager info
//              pKerbCred - credential to be updated
//
//  Requires:
//
//  Returns:
//
//  Notes:
//
//
//--------------------------------------------------------------------------

NTSTATUS
KerbAddCertCredToPrimaryCredential(
    IN PKERB_LOGON_SESSION pLogonSession,
    IN PUNICODE_STRING pTargetName,
    IN PCERT_CONTEXT pCertContext,
    IN PUNICODE_STRING pPin,
    IN ULONG CredFlags,
    IN OUT PKERB_PRIMARY_CREDENTIAL *ppCredMgrCred
    )

{
    UNICODE_STRING UserName = {0};
    UNICODE_STRING DomainName = {0};  // get the domain from the UPN in the cert
    PKERB_PRIMARY_CREDENTIAL pOldCred;
    PKERB_PRIMARY_CREDENTIAL pNewCred = NULL;
    NTSTATUS Status = STATUS_SUCCESS;

    //
    // Get the client name from the cert.
    // Place it in the return location
    //
    Status = KerbGetPrincipalNameFromCertificate(pCertContext, &UserName);
    if (!NT_SUCCESS(Status))
    {
        goto Cleanup;
    }

    //
    // Initialize the primary credentials structure
    //

    Status = KerbInitPrimaryCreds(
                pLogonSession,
                &UserName,
                &DomainName,
                pTargetName,
                pPin,
                TRUE,
                pCertContext,
                &pNewCred
                );
    if (!NT_SUCCESS(Status))
    {
        goto Cleanup;
    }

    pNewCred->PublicKeyCreds->InitializationInfo |= CredFlags;

    Status  = KerbInitializePkCreds(
                    pNewCred->PublicKeyCreds
                    );
    if (!NT_SUCCESS(Status))
    {
        goto Cleanup;
    }

    pOldCred = *ppCredMgrCred;
    *ppCredMgrCred = pNewCred;
    pNewCred = NULL;


    KerbFreePrimaryCredentials(pOldCred, TRUE);
Cleanup:
    KerbFreeString(&UserName);
    KerbFreePrimaryCredentials(pNewCred, TRUE);

    return Status;
}

//+-------------------------------------------------------------------------
//
//  Function:   KerbAddPasswordCredToPrimaryCredential
//
//  Synopsis:   Adds cert context and Pin info to the kerb credential
//              structure.
//
//  Arguments:  pCertContext - logon session
//              pCertCredInfo - cert cred manager info
//              pKerbCred - credential to be updated
//
//  Requires:
//
//  Returns:
//
//  Notes:
//
//
//--------------------------------------------------------------------------

NTSTATUS
KerbAddPasswordCredToPrimaryCredential(
    IN PKERB_LOGON_SESSION pLogonSession,
    IN PUNICODE_STRING pUserName,
    IN PUNICODE_STRING pTargetDomainName,
    IN PUNICODE_STRING pPassword,
    IN OUT PKERB_PRIMARY_CREDENTIAL *ppCredMgrCred
    )
{
    PKERB_PRIMARY_CREDENTIAL pOldCred;
    PKERB_PRIMARY_CREDENTIAL pNewCred = NULL;
    UNICODE_STRING RevealedPassword;
    NTSTATUS Status = STATUS_SUCCESS;

    RtlZeroMemory(&RevealedPassword, sizeof(RevealedPassword));
    Status = KerbDuplicatePassword(
                &RevealedPassword,
                pPassword
                );
    if (!NT_SUCCESS(Status))
    {
        goto Cleanup;
    }

    KerbRevealPassword( &RevealedPassword );

    //
    // Initialize the primary credentials structure
    //

    Status = KerbInitPrimaryCreds(
                pLogonSession,
                pUserName,
                pTargetDomainName,
                NULL,
                &RevealedPassword,
                FALSE,
                NULL,
                &pNewCred
                );
    if (!NT_SUCCESS(Status))
    {
        goto Cleanup;
    }

    pOldCred = *ppCredMgrCred;
    *ppCredMgrCred = pNewCred;
    pNewCred = NULL;


    KerbFreePrimaryCredentials(pOldCred, TRUE);
Cleanup:
    if ((0 != RevealedPassword.Length) && (NULL != RevealedPassword.Buffer))
    {
        RtlSecureZeroMemory(RevealedPassword.Buffer, RevealedPassword.Length);
        KerbFreeString(&RevealedPassword);
    }

    //
    // Don't leak password length
    //
    RevealedPassword.Length = RevealedPassword.MaximumLength = 0;
    KerbFreePrimaryCredentials(pNewCred, TRUE);

    return Status;
}


//+-------------------------------------------------------------------------
//
//  Function:   KerbCreateCredmanCred
//
//  Synopsis:   Goes to the credential manager to try and find
//              credentials for the specific target
//
//  Arguments:
//              CredToAdd - PrimaryCredential to add to credman cred
//              ppNewCred - IN OUT built cred, free w/ KerbFreeCredmanCred
//
//  Requires:
//
//  Returns:
//
//  Notes:
//
//
//--------------------------------------------------------------------------
NTSTATUS
KerbCreateCredmanCred(
    IN PKERB_PRIMARY_CREDENTIAL CredToAdd,
    IN ULONG AdditionalCredFlags,
    IN OUT PKERB_CREDMAN_CRED * ppNewCred
    )
{

    NTSTATUS Status = STATUS_SUCCESS;

    *ppNewCred = NULL;

    *ppNewCred = (PKERB_CREDMAN_CRED) KerbAllocate(sizeof(KERB_CREDMAN_CRED));
    if (NULL == *ppNewCred)
    {
        return STATUS_INSUFFICIENT_RESOURCES;
    }


    Status = KerbDuplicateStringEx(
                    &(*ppNewCred)->CredmanUserName,
                    &CredToAdd->UserName,
                    FALSE
                    );

    if (!NT_SUCCESS(Status))
    {
        goto Cleanup;
    }

    Status = KerbDuplicateStringEx(
                &(*ppNewCred)->CredmanDomainName,
                &CredToAdd->DomainName,
                FALSE
                );

    if (!NT_SUCCESS(Status))
    {
        goto Cleanup;
    }


    (*ppNewCred)->SuppliedCredentials = CredToAdd;
    (*ppNewCred)->CredentialFlags |= AdditionalCredFlags;

Cleanup:

    if (!NT_SUCCESS(Status))
    {
        KerbFreeCredmanCred(*ppNewCred);
        *ppNewCred = NULL;
    }


    return (Status);

}

//+-------------------------------------------------------------------------
//
//  Function:   KerbAddCredmanCredToLogonSession
//
//  Synopsis:   Goes to the credential manager to try and find
//              credentials for the specific target
//
//  Arguments:  pLogonSession - logon session
//              CredToMatch - PrimaryCredential to look for in logon session
//
//  Requires:   Hold logon session lock...
//
//  Returns:
//
//  Notes:  CredToMatch freed in this function...
//
//
//--------------------------------------------------------------------------
NTSTATUS
KerbAddCredmanCredToLogonSession(
    IN PKERB_LOGON_SESSION pLogonSession,
    IN PKERB_PRIMARY_CREDENTIAL CredToMatch,
    IN ULONG AdditionalCredFlags,
    IN OUT PKERB_CREDMAN_CRED *NewCred
    )
{

    NTSTATUS Status = STATUS_SUCCESS;
    PKERB_CREDMAN_CRED CredmanCred = NULL;

    PLIST_ENTRY ListEntry;
    BOOLEAN PublicKeyCred = FALSE;
    BOOLEAN Found = FALSE;

    *NewCred = NULL;


    //
    // First, make a determination if the cred's already listed
    // Replace w/ new one if password has changed.
    //

    KerbLockList(&pLogonSession->CredmanCredentials);


    //
    // Go through the list of logon sessions looking for the correct
    // credentials, if they exist...
    //

    for (ListEntry = pLogonSession->CredmanCredentials.List.Flink ;
         (ListEntry != &pLogonSession->CredmanCredentials.List && !Found);
         ListEntry = ListEntry->Flink )
    {
        CredmanCred = CONTAINING_RECORD(ListEntry, KERB_CREDMAN_CRED, ListEntry.Next);



        // We only match on UserName / DomainName for credman creds
        if(!RtlEqualUnicodeString(
                &CredToMatch->UserName,
                &CredmanCred->CredmanUserName,
                TRUE
                ))
        {
            continue;
        }


        if(!RtlEqualUnicodeString(
                &CredToMatch->DomainName,
                &CredmanCred->CredmanDomainName,
                TRUE
                ))
        {
            continue;
        }

        //
        // Differentiate between pkiint & password based structures
        //
        if ((CredmanCred->SuppliedCredentials->PublicKeyCreds != NULL) &&
            (CredToMatch->PublicKeyCreds != NULL))

        {
            if (!KerbComparePublicKeyCreds(
                    CredToMatch->PublicKeyCreds,
                    CredmanCred->SuppliedCredentials->PublicKeyCreds
                    ))
            {
                continue;
            }

            PublicKeyCred = TRUE;
        }


        Found = TRUE;
        *NewCred = CredmanCred;


    } // FOR


    if (Found)
    {
        KerbReferenceCredmanCred(
            *NewCred,
            pLogonSession,
            FALSE
            );

        D_DebugLog((DEB_TRACE_CRED, "Found match %p\n", (*NewCred)));

        //
        // Found one.  Now we've got to compare the pwd information, and
        // change it, if needed...
        //
        if (!PublicKeyCred)
        {
            //
            // Compare the password list, as the pwd may have changed...
            // Note:  This has the by-product of tossing old tickets, but
            // that's desirable if the pwd's changed, so user knows the creds
            // are bogus.
            //
            if (!KerbComparePasswords(
                    (*NewCred)->SuppliedCredentials->Passwords,
                    CredToMatch->Passwords
                    ))
            {

                D_DebugLog((DEB_ERROR, "Changing credman cred password\n"));

                PKERB_PRIMARY_CREDENTIAL OldPwds = (*NewCred)->SuppliedCredentials;
                (*NewCred)->SuppliedCredentials = CredToMatch;
                KerbFreePrimaryCredentials(OldPwds, TRUE);

                (*NewCred)->CredentialFlags &= ~KERB_CRED_TGT_AVAIL;

            }
            else
            {
                KerbFreePrimaryCredentials(CredToMatch, TRUE);
            }

        }
        else
        {
            //
            //  Free up the cred to match, since we already have a copy stored w/ our credential
            //
            KerbFreePrimaryCredentials(CredToMatch, TRUE);
        }


    }
    else // new cred, so prepare CredmanCred to add to list...
    {

        Status = KerbCreateCredmanCred(
                    CredToMatch,
                    AdditionalCredFlags,
                    NewCred
                    );

        if (!NT_SUCCESS(Status))
        {
            goto Cleanup;
        }

        KerbInsertListEntryTail(
            &((*NewCred)->ListEntry),
            &pLogonSession->CredmanCredentials
            );

        // add a ref for caller of this function.
        KerbReferenceCredmanCred(
            (*NewCred),
            pLogonSession,
            FALSE
            );
    }

    //
    // We need an initial TGT for this cred
    //
    if (((*NewCred)->CredentialFlags & KERB_CRED_TGT_AVAIL) == 0)
    {

        //
        // Get an initial TGT for this cred.
        //
        Status = KerbGetTicketGrantingTicket(
                    pLogonSession,
                    NULL,
                    (*NewCred),
                    NULL,
                    NULL,
                    NULL
                    );

        if (!NT_SUCCESS(Status))
        {
            DebugLog((DEB_ERROR, "Failed to get TGT for credman cred  - %x\n",Status));

            if( Status == STATUS_NO_LOGON_SERVERS )
            {
                //
                // negotiate treats NO_LOGON_SERVERS as a downgrade.
                // Nego allows downgrade for explicit creds, but not default creds.
                // Credman is basically explicit creds.  So over-ride the error code.
                //

                Status = SEC_E_TARGET_UNKNOWN;
            }

            goto Cleanup;
        }

        (*NewCred)->CredentialFlags |= KERB_CRED_TGT_AVAIL;
    }

Cleanup:

    KerbUnlockList(&pLogonSession->CredmanCredentials);

    return (Status);
}

//+-------------------------------------------------------------------------
//
//  Function:   KerbConvertCertCredential
//
//  Synopsis:   Converts a cert cred to a primary cred
//
//  Arguments:  pLogonSession - logon session
//              pTargetName - service name
//              pTargetDomainName - domain name
//              pTargetForestName - forest name
//              pKerbCred - credential to be allocated
//
//  Requires:   You've got to be impersonating when making this call.
//
//  Returns:
//
//  Notes:
//
//
//--------------------------------------------------------------------------
NTSTATUS
KerbConvertCertCredential(
        IN PKERB_LOGON_SESSION LogonSession,
        IN LPCWSTR MarshalledCredential,
        IN PUNICODE_STRING TargetName,
        IN OUT PKERB_PRIMARY_CREDENTIAL * PrimaryCredential
        )

{
    NTSTATUS                    Status;
    CRED_MARSHAL_TYPE           MarshalType;
    PCERT_CREDENTIAL_INFO       pCertCredInfo = NULL;
    PKERB_PRIMARY_CREDENTIAL    LocalCredential = NULL;
    HCERTSTORE                  hCertStore = NULL;
    CRYPT_HASH_BLOB             HashBlob;
    PCERT_CONTEXT               pCertContext = NULL;
    UNICODE_STRING              Pin = {0};

    *PrimaryCredential = NULL;

    //
    // unmarshal the cert cred info from the user name field
    // of the cred man cred
    //
    if (!CredUnmarshalCredentialW(
            MarshalledCredential,
            &MarshalType,
            (void**)&pCertCredInfo
            ))
    {
        Status = STATUS_LOGON_FAILURE;
        goto Cleanup;
    }

    if (CertCredential != MarshalType)
    {
        Status = STATUS_LOGON_FAILURE;
        goto Cleanup;
    }

    // open a cert store if necessary
    hCertStore = CertOpenStore(
                    CERT_STORE_PROV_SYSTEM_W,
                    0,
                    0,
                    CERT_SYSTEM_STORE_CURRENT_USER,
                    L"MY"
                    );

    if (NULL == hCertStore)
    {
        D_DebugLog((DEB_ERROR,"Failed to open the user cert store even though a cert cred was found.\n"));
        Status = STATUS_LOGON_FAILURE;
        goto Cleanup;
    }

    // find the cert in the store which meets this hash
    HashBlob.cbData = sizeof(pCertCredInfo->rgbHashOfCert);
    HashBlob.pbData = pCertCredInfo->rgbHashOfCert;
    pCertContext = (PCERT_CONTEXT)CertFindCertificateInStore(
                                        hCertStore,
                                        X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
                                        0,
                                        CERT_FIND_HASH,
                                        &HashBlob,
                                        pCertContext);

    if ( KerbCheckForPKINITEnhKeyUsage( pCertContext ) )
    {
        //
        // add the cert credential to the Kerb credential
        //
        // Cred man will no longer give us a pin, only the CSP
        // knows that information...
        //
        Status = KerbAddCertCredToPrimaryCredential(
                    LogonSession,
                    TargetName,
                    pCertContext,
                    &Pin,   // essentially, a NULL string
                    CONTEXT_INITIALIZED_WITH_CRED_MAN_CREDS,
                    &LocalCredential
                    );
        if (!NT_SUCCESS(Status))
        {
            D_DebugLog((DEB_WARN,"Failed to add the cert cred to the credential.\n"));
            goto Cleanup;
        }


    }
    else
    {
        //
        // Can't find the certificate
        //
        DebugLog((DEB_ERROR, "Can't find cert from credman\n"));

        //
        // TBD:
        // Log Event
        /*
            KerbReportCredmanError(ID_MISSING_CERT);

          */
        Status = STATUS_LOGON_FAILURE;
        goto Cleanup;
    }


    *PrimaryCredential = LocalCredential;
    LocalCredential = NULL;

Cleanup:

    if (NULL != pCertCredInfo)
    {
        CredFree(pCertCredInfo);
    }

    if (NULL != pCertContext)
    {
        CertFreeCertificateContext(pCertContext);
    }

    if ( LocalCredential )
    {
        KerbFree( LocalCredential );
    }

    if (NULL != hCertStore)
    {
        CertCloseStore(hCertStore, 0);
    }

    return (Status);
}







//+-------------------------------------------------------------------------
//
//  Function:   KerbCheckCredMgrForGivenTarget
//
//  Synopsis:   Goes to the credential manager to try and find
//              credentials for the specific target
//
//  Arguments:  pLogonSession - logon session
//              pTargetName - service name
//              pTargetDomainName - domain name
//              pTargetForestName - forest name
//              pKerbCred - credential to be allocated
//
//  Requires:
//
//  Returns:
//
//  Notes:
//
//
//--------------------------------------------------------------------------

NTSTATUS
KerbCheckCredMgrForGivenTarget(
    IN PKERB_LOGON_SESSION LogonSession,
    IN PKERB_CREDENTIAL Credential,
    IN PUNICODE_STRING SuppliedTargetName,
    IN PKERB_INTERNAL_NAME pTargetName,
    IN ULONG TargetInfoFlags,
    IN PUNICODE_STRING pTargetDomainName,
    IN PUNICODE_STRING pTargetForestName,
    IN OUT PKERB_CREDMAN_CRED *CredmanCred,
    IN OUT PBYTE *pbMarshalledTargetInfo,
    IN OUT ULONG *cbMarshalledTargetInfo
    )
{
    CREDENTIAL_TARGET_INFORMATIONW CredTargetInfo;
    ULONG cCreds = 0;
    PCREDENTIALW           *rgpCreds = NULL;
    PCREDENTIALW            CertCred = NULL;
    PCREDENTIALW            PasswordCred = NULL;
    PENCRYPTED_CREDENTIALW *rgpEncryptedCreds = NULL;
    LPWSTR pwszTargetName = NULL;
    LPWSTR pwszDomainName = NULL;
    LPWSTR pwszForestName = NULL;
    BOOLEAN Impersonating = FALSE;
    ULONG i;
    UNICODE_STRING CredManUserName = {0};
    UNICODE_STRING CredManDomainName = {0};
    UNICODE_STRING CredManTargetName = {0};
    UNICODE_STRING Password = {0};
    UNICODE_STRING RevealedPassword;
    HANDLE ClientTokenHandle = NULL;
    CREDENTIAL_TARGET_INFORMATIONW *pTargetInfo = NULL;
    NTSTATUS Status = STATUS_SUCCESS;
    PKERB_PRIMARY_CREDENTIAL pCredMgrCred = NULL;
    HANDLE ImpersonationToken = NULL;
    USHORT ClearBlobSize = 0;
    ULONG AdditionalCredFlags = 0;
    SECPKG_CALL_INFO CallInfo = {0};

    RtlZeroMemory(&CredTargetInfo, sizeof(CredTargetInfo));
    RtlZeroMemory(&RevealedPassword, sizeof(RevealedPassword));

    *CredmanCred = NULL;

    Status = CredpExtractMarshalledTargetInfo(
                        SuppliedTargetName,
                        &pTargetInfo
                        );

    if (!NT_SUCCESS(Status))
    {
        goto Cleanup;
    }

    if (!LsaFunctions->GetCallInfo(&CallInfo))
    {
        Status = STATUS_INTERNAL_ERROR;
        goto Cleanup;
    }

    //
    // Allocate space for the names
    //

    if (NULL != pTargetName)
    {
        //
        // want to use the second part of the SPN
        //
        if (pTargetName->NameCount > 1)
        {
            SafeAllocaAllocate(pwszTargetName, pTargetName->Names[1].Length + sizeof(WCHAR));

            if (NULL == pwszTargetName)
            {
                Status = STATUS_INSUFFICIENT_RESOURCES;
                goto Cleanup;
            }

            RtlCopyMemory(
                (PUCHAR)pwszTargetName,
                pTargetName->Names[1].Buffer,
                pTargetName->Names[1].Length);

            pwszTargetName[pTargetName->Names[1].Length / sizeof(WCHAR)] = L'\0';
            CredTargetInfo.DnsServerName = pwszTargetName;
            RtlInitUnicodeString(&CredManTargetName, pwszTargetName);
        }
    }

    if ((NULL != pTargetDomainName) && (0 != pTargetDomainName->Length) &&
        (NULL != pTargetDomainName->Buffer))
    {
        SafeAllocaAllocate(pwszDomainName, pTargetDomainName->Length + sizeof(WCHAR));

        if (NULL == pwszDomainName)
        {
            Status = STATUS_INSUFFICIENT_RESOURCES;
            goto Cleanup;
        }

        RtlCopyMemory(
            (PUCHAR)pwszDomainName,
            pTargetDomainName->Buffer,
            pTargetDomainName->Length);

        pwszDomainName[pTargetDomainName->Length / sizeof(WCHAR)] = L'\0';
        CredTargetInfo.DnsDomainName = pwszDomainName;
    }

    if ((NULL != pTargetForestName) && (0 != pTargetForestName->Length) &&
        (NULL != pTargetForestName->Buffer))
    {
        SafeAllocaAllocate(pwszForestName, pTargetForestName->Length + sizeof(WCHAR));

        if (NULL == pwszForestName)
        {
            Status = STATUS_INSUFFICIENT_RESOURCES;
            goto Cleanup;
        }

        RtlCopyMemory(
            (PUCHAR)pwszForestName,
            pTargetForestName->Buffer,
            pTargetForestName->Length);

        pwszForestName[pTargetForestName->Length / sizeof(WCHAR)] = L'\0';
        CredTargetInfo.DnsTreeName = pwszForestName;
    }

    CredTargetInfo.PackageName = KERBEROS_PACKAGE_NAME;

    //
    // if marshalled targetinfo supplied, use it instead.
    //

    if ( pTargetInfo )
    {
        CredTargetInfo.TargetName = pTargetInfo->TargetName;
        CredTargetInfo.NetbiosServerName = pTargetInfo->NetbiosServerName;
        CredTargetInfo.DnsServerName = pTargetInfo->DnsServerName;
        CredTargetInfo.NetbiosDomainName = pTargetInfo->NetbiosDomainName;
        CredTargetInfo.DnsDomainName = pTargetInfo->DnsDomainName;
        CredTargetInfo.DnsTreeName = pTargetInfo->DnsTreeName;
        CredTargetInfo.Flags |= pTargetInfo->Flags;
    }
    else
    {
        //
        // copy the names in to the memory and set the names
        // in the PCREDENTIAL_TARGET_INFORMATIONW struct
        //

        if (pwszTargetName)
        {
            CredTargetInfo.Flags |= CRED_TI_SERVER_FORMAT_UNKNOWN;
        }
        if (pwszDomainName)
        {
            CredTargetInfo.Flags |= CRED_TI_DOMAIN_FORMAT_UNKNOWN;
        }

        CredTargetInfo.Flags |= TargetInfoFlags;
    }

    // need to specify a flag to indicate that we don't know what we are
    // doing and both types of names should be checked.

    Status = LsaFunctions->CrediReadDomainCredentials(
                            &LogonSession->LogonId,
                            CREDP_FLAGS_IN_PROCESS,     // Allow password to be returned
                            &CredTargetInfo,
                            0,
                            &cCreds,
                            &rgpEncryptedCreds );

    rgpCreds = (PCREDENTIALW *) rgpEncryptedCreds;

    //
    // return a copy of the credential target info for kernel callers (MUP/DFS/RDR).
    //

    if (NT_SUCCESS(Status) || (CallInfo.Attributes & SECPKG_CALL_KERNEL_MODE))
    {
        CredMarshalTargetInfo(
            &CredTargetInfo,
            (PUSHORT*)pbMarshalledTargetInfo,
            cbMarshalledTargetInfo
            );
    }

    if (!NT_SUCCESS(Status))
    {
        // quiet these.
        if ((Status == STATUS_NOT_FOUND) ||(Status == STATUS_NO_SUCH_LOGON_SESSION) )
        {
            D_DebugLog((DEB_TRACE, "No credentials from the cred mgr!\n", Status));
        }
        else
        {
            DebugLog((DEB_WARN, "Failed to read credentials from the cred mgr 0x%x.\n", Status));
        }

        // indicate success so we proceed with default creds
        Status = STATUS_SUCCESS;
        goto Cleanup;
    }

    //
    // Look for cred types we understand.
    //
    for (i = 0; i < cCreds; i++)
    {
        if ((rgpCreds[i])->Type == CRED_TYPE_DOMAIN_CERTIFICATE)
        {
            CertCred = rgpCreds[i];
            ClearBlobSize = (USHORT) (rgpEncryptedCreds[i])->ClearCredentialBlobSize;
        }
        else if ((rgpCreds[i])->Type == CRED_TYPE_DOMAIN_PASSWORD)
        {
            PasswordCred = rgpCreds[i];
            ClearBlobSize = (USHORT) (rgpEncryptedCreds[i])->ClearCredentialBlobSize;
        }
    }

    if (!(CertCred || PasswordCred))
    {
        DebugLog((DEB_ERROR, "Found no credman creds we understand\n"));
        // indicate success so we proceed with default creds
        Status = STATUS_SUCCESS;
        goto Cleanup;
    }

    //
    // now evaluate the creds which were returned to determine
    // which one we should use.
    //
    // First choice is a certificate which may be
    // used for PKINIT.
    //
    if ( CertCred )
    {

        // check for the prompt now flag
        if (CertCred->Flags & CRED_FLAGS_PROMPT_NOW)
        {
            DebugLog((DEB_ERROR, "Asking for prompt on credman cred \n"));
            Status = STATUS_SMARTCARD_SILENT_CONTEXT;
            goto Cleanup;
        }


        if (!lstrcmpW(CRED_SESSION_WILDCARD_NAME_W, CertCred->TargetName))
        {
            AdditionalCredFlags |= RAS_CREDENTIAL;
        }



        if( !Impersonating )
        {

            //
            // Save off the old token, if it exists.
            //
            Status = NtOpenThreadToken(
                        NtCurrentThread(),
                        TOKEN_QUERY | TOKEN_IMPERSONATE,
                        TRUE,
                        &ImpersonationToken
                        );

            if (!NT_SUCCESS( Status ) && Status != STATUS_NO_TOKEN )
            {
                DebugLog((DEB_ERROR, "NtOpenThreadToken failed %x\n", Status));
                goto Cleanup;
            }

            Status = LsaFunctions->OpenTokenByLogonId(
                                        &LogonSession->LogonId,
                                        &ClientTokenHandle
                                        );
            if (!NT_SUCCESS(Status))
            {
                D_DebugLog((DEB_ERROR,"Unable to get the client token handle.\n"));
                goto Cleanup;
            }

            if(!SetThreadToken(NULL, ClientTokenHandle))
            {
                D_DebugLog((DEB_ERROR,"Unable to impersonate the client token handle.\n"));
                Status = STATUS_CANNOT_IMPERSONATE;
                goto Cleanup;
            }

            Impersonating = TRUE;
        }

        Status = KerbConvertCertCredential(
                        LogonSession,
                        CertCred->UserName,
                        &CredManTargetName,
                        &pCredMgrCred
                        );

        if (!NT_SUCCESS( Status ))
        {
            DebugLog((DEB_ERROR, "KerbConvertCertCredential failed %x\n", Status));
            goto Cleanup;
        }

    }
    else if ( PasswordCred )
    {

        // check for the prompt now flag
        if ( PasswordCred->Flags & CRED_FLAGS_PROMPT_NOW)
        {
            DebugLog((DEB_ERROR, "Asking for prompt on credman cred \n"));
            Status = SEC_E_LOGON_DENIED;
            goto Cleanup;
        }

        if (!lstrcmpW(CRED_SESSION_WILDCARD_NAME_W, PasswordCred->TargetName))
        {
            AdditionalCredFlags |= RAS_CREDENTIAL;
        }

        //
        // get the user name and domain name from the credential manager info
        //
        // NOTE - CredpParseUserName does not allocate the UNICODE_STRING
        // buffers so these should not be freed (RtlInitUnicodeString is used)
        //

        Status = CredpParseUserName(
                        PasswordCred->UserName,
                        &CredManUserName,
                        &CredManDomainName);

        if (!NT_SUCCESS(Status))
        {
            D_DebugLog((DEB_WARN,"Failed to parse the add the cert cred to the credential.\n"));
            goto Cleanup;
        }

        Password.Buffer = (LPWSTR)(PasswordCred->CredentialBlob);
        Password.MaximumLength = (USHORT)PasswordCred->CredentialBlobSize;
        Password.Length = ClearBlobSize;

        // add the cert credential to the Kerb credential
        Status = KerbAddPasswordCredToPrimaryCredential(
                        LogonSession,
                        &CredManUserName,
                        &CredManDomainName,
                        &Password,
                        &pCredMgrCred
                        );
        if (!NT_SUCCESS(Status))
        {
            DebugLog((DEB_WARN,"Failed to add the cred mgr password to the credential.\n"));
            goto Cleanup;
        }
    }
    else
    {
        //
        // NO creds found we can use.
        //
        DebugLog((DEB_ERROR, "No valid creds in credman\n"));
        Status = STATUS_NOT_FOUND;
        goto Cleanup;

    }

    //
    // We've built the credman cred, now go ahead and add it to the logon.
    //
    Status = KerbAddCredmanCredToLogonSession(
                        LogonSession,
                        pCredMgrCred, // note: freed by this fn
                        AdditionalCredFlags,
                        CredmanCred
                        );

    if (!NT_SUCCESS(Status))
    {
        DebugLog((DEB_ERROR, "Failed to add credman cred to logon session\n"));
        goto Cleanup;
    }

Cleanup:

    if (Impersonating)
    {
        if (ImpersonationToken != NULL)
        {
            SetThreadToken(NULL, ImpersonationToken);

        }
        else
        {
            RevertToSelf();
        }
    }

    if ( ImpersonationToken )
    {
        CloseHandle(ImpersonationToken);
    }

    if ( ClientTokenHandle )
    {
        CloseHandle( ClientTokenHandle );
    }

    if( pTargetInfo != NULL )
    {
        LocalFree( pTargetInfo );
    }

    SafeAllocaFree(pwszTargetName);
    SafeAllocaFree(pwszDomainName);
    SafeAllocaFree(pwszForestName);

    if (NULL != rgpCreds)
    {
        //
        // Free the returned credentials
        //

        LsaFunctions->CrediFreeCredentials(
                                cCreds,
                                rgpEncryptedCreds );
    }

    return Status;
}

NTSTATUS
CopyCredManCredentials(
    IN PLUID LogonId,
    CREDENTIAL_TARGET_INFORMATIONW* pTargetInfo,
    IN OUT PUNICODE_STRING pUserName,
    IN OUT PUNICODE_STRING pDomainName,
    IN OUT PUNICODE_STRING pPassword
    )

/*++

Routine Description:

    Look for a keyring credential entry for the specified domain, and copy to Context handle if found

Arguments:

    LogonId -- LogonId of the calling process.

    pTargetInfo -- Information on target to search for creds.

    Context - Points to the ContextHandle of the Context
        to be referenced.

Return Value:

    STATUS_SUCCESS -- All OK

    STATUS_NOT_FOUND - Credential couldn't be found.

    All others are real failures and should be returned to the caller.
--*/

{
    NTSTATUS Status;
    PCREDENTIALW *Credentials = NULL;
    PENCRYPTED_CREDENTIALW *EncryptedCredentials = NULL;
    ULONG CredentialCount;
    ULONG CredIndex;

    RtlInitUnicodeString(pUserName, NULL);
    RtlInitUnicodeString(pDomainName, NULL);
    RtlInitUnicodeString(pPassword, NULL);

    Status = LsaFunctions->CrediReadDomainCredentials(
                            LogonId,
                            CREDP_FLAGS_IN_PROCESS,     // Allow password to be returned
                            pTargetInfo,
                            0,  // no flags
                            &CredentialCount,
                            &EncryptedCredentials );

    Credentials = (PCREDENTIALW *) EncryptedCredentials;

    if(!NT_SUCCESS(Status))
    {
        //
        // Ideally, only STATUS_NO_SUCH_LOGON_SESSION should be converted to
        // STATUS_NOT_FOUND.  However, swallowing all failures and asserting
        // these specific two works around a bug in CrediReadDomainCredentials
        // which returns invalid parameter if the target is a user account name.
        // Eventually, CrediReadDomainCredentials should return a more appropriate
        // error in this case.
        //

        return STATUS_NOT_FOUND;
    }


    //
    // Loop through the list of credentials
    //

    for ( CredIndex=0; CredIndex<CredentialCount; CredIndex++ ) {

        UNICODE_STRING UserName;
        UNICODE_STRING DomainName;
        UNICODE_STRING TempString;

        //
        // only supports password credentials
        //

        if ( Credentials[CredIndex]->Type != CRED_TYPE_DOMAIN_PASSWORD ) {
            continue;
        }

        if ( Credentials[CredIndex]->Flags & CRED_FLAGS_PROMPT_NOW ) {
            Status = SEC_E_LOGON_DENIED;
            goto Cleanup;
        }

        //
        // Sanity check the credential
        //

        if ( Credentials[CredIndex]->UserName == NULL ) {
            Status = STATUS_NOT_FOUND;
            goto Cleanup;
        }

        //
        // Convert the UserName to domain name and user name
        //

        Status = CredpParseUserName(
                        Credentials[CredIndex]->UserName,
                        &UserName,
                        &DomainName
                        );

        if(!NT_SUCCESS(Status))
        {
            goto Cleanup;
        }

        if( DomainName.Buffer )
        {
            Status = KerbDuplicateString(pDomainName, &DomainName);
            if ( !NT_SUCCESS( Status ) )
            {
                goto Cleanup;
            }
        }



        if( UserName.Buffer )
        {
            Status = KerbDuplicateString(pUserName, &UserName);
            if ( !NT_SUCCESS( Status ) )
            {
                goto Cleanup;
            }
        }


        //
        // Free the existing password and add the new one
        //

        TempString.Buffer = (LPWSTR)Credentials[CredIndex]->CredentialBlob;
        TempString.MaximumLength = (USHORT) Credentials[CredIndex]->CredentialBlobSize;
        TempString.Length = (USHORT) EncryptedCredentials[CredIndex]->ClearCredentialBlobSize;

        // zero length password must be treated as blank or will assume it should use the
        // password of the currently logged in user.

        if ( TempString.Length == 0 )
        {
            TempString.Buffer = L"";
        }

        Status = KerbDuplicatePassword(pPassword, &TempString);
        if ( !NT_SUCCESS( Status ) )
        {
            goto Cleanup;
        }

        goto Cleanup;
    }

    Status = STATUS_NOT_FOUND;

Cleanup:

    if(!NT_SUCCESS(Status))
    {
        KerbFreeString( pUserName );
        KerbFreeString( pDomainName );
        KerbFreeString( pPassword );

        pUserName->Buffer = NULL;
        pDomainName->Buffer = NULL;
        pPassword->Buffer = NULL;
    }

    //
    // Free the returned credentials
    //

    LsaFunctions->CrediFreeCredentials(
                            CredentialCount,
                            EncryptedCredentials );

    return Status;
}



NTSTATUS
KerbProcessUserNameCredential(
    IN  PUNICODE_STRING MarshalledUserName,
    OUT PUNICODE_STRING UserName,
    OUT PUNICODE_STRING DomainName,
    OUT PUNICODE_STRING Password
    )
{

    WCHAR FastUserName[ UNLEN+1 ];
    LPWSTR SlowUserName = NULL;
    LPWSTR TempUserName;
    CRED_MARSHAL_TYPE CredMarshalType;
    PUSERNAME_TARGET_CREDENTIAL_INFO pCredentialUserName = NULL;

    CREDENTIAL_TARGET_INFORMATIONW TargetInfo;
    ULONG CredTypes;

    SECPKG_CLIENT_INFO ClientInfo;
    NTSTATUS Status = STATUS_NOT_FOUND;


    if( (MarshalledUserName->Length+sizeof(WCHAR)) <= sizeof(FastUserName) )
    {
        TempUserName = FastUserName;
    }
    else
    {
        SafeAllocaAllocate(SlowUserName, MarshalledUserName->Length + sizeof(WCHAR));

        if( SlowUserName == NULL )
        {
            return STATUS_INSUFFICIENT_RESOURCES;
        }

        TempUserName = SlowUserName;
    }


    //
    // copy the input to a NULL terminated string, then attempt to unmarshal it.
    //

    RtlCopyMemory(  TempUserName,
                    MarshalledUserName->Buffer,
                    MarshalledUserName->Length
                    );

    TempUserName[ MarshalledUserName->Length / sizeof(WCHAR) ] = L'\0';

    if(!CredUnmarshalCredentialW(
                        TempUserName,
                        &CredMarshalType,
                        (VOID**)&pCredentialUserName
                        ))
    {
        goto Cleanup;
    }

    if( (CredMarshalType != UsernameTargetCredential) )
    {
        goto Cleanup;
    }


    //
    // now query credential manager for a match.
    //

    Status = LsaFunctions->GetClientInfo(&ClientInfo);
    if(!NT_SUCCESS(Status))
    {
        goto Cleanup;
    }

    ZeroMemory( &TargetInfo, sizeof(TargetInfo) );

    CredTypes = CRED_TYPE_DOMAIN_PASSWORD;

    TargetInfo.Flags = CRED_TI_USERNAME_TARGET;
    TargetInfo.TargetName = pCredentialUserName->UserName;
    TargetInfo.PackageName = KERBEROS_PACKAGE_NAME;
    TargetInfo.CredTypeCount = 1;
    TargetInfo.CredTypes = &CredTypes;


    Status = CopyCredManCredentials(
                    &ClientInfo.LogonId,
                    &TargetInfo,
                    UserName,
                    DomainName,
                    Password
                    );

    if(!NT_SUCCESS(Status))
    {
        goto Cleanup;
    }

    KerbRevealPassword( Password );

Cleanup:

    if( pCredentialUserName != NULL )
    {
        CredFree( pCredentialUserName );
    }

    SafeAllocaFree( SlowUserName );

    return Status;
}






//+-------------------------------------------------------------------------
//
//  Function:   KerbMarshallMSVCredential
//
//  Synopsis:   Takes a SECPKG_SUPPLEMENTAL_CRED and bundles it up as a
//              PCREDENTIAL structure.
//
//  Arguments:  NtlmCred - Supplemental cred from PAC
//              MarshalledCred - credential being created.
//
//  Requires:
//
//  Returns:
//
//  Notes:
//
//
//--------------------------------------------------------------------------
NTSTATUS
KerbMarshallMSVCredential(
        IN PSECPKG_SUPPLEMENTAL_CRED NtlmCred,
        IN PUNICODE_STRING UserName,
        IN PUNICODE_STRING TargetName,
        IN OUT PKERB_QUERY_SUPPLEMENTAL_CREDS_RESPONSE * MarshalledCred,
        IN OUT PULONG Size
        )
{

    PKERB_QUERY_SUPPLEMENTAL_CREDS_RESPONSE  LocalCred = NULL;
    NTSTATUS                                 Status = STATUS_SUCCESS;
    PBYTE                                    Where;
    ULONG                                    LocalSize;


    LocalSize = (sizeof(KERB_QUERY_SUPPLEMENTAL_CREDS_RESPONSE) +
                    ROUND_UP_COUNT( UserName->MaximumLength, ALIGN_LPDWORD ) +
                    ROUND_UP_COUNT( TargetName->MaximumLength, ALIGN_LPDWORD ) +
                    ROUND_UP_COUNT( NtlmCred->CredentialSize, DESX_BLOCKLEN));


    LocalCred = (PKERB_QUERY_SUPPLEMENTAL_CREDS_RESPONSE) KerbAllocate(LocalSize);
    if (LocalCred == NULL)
    {
        Status = STATUS_NO_MEMORY;
        goto Cleanup;
    }

    Where = (PBYTE) LocalCred + sizeof(KERB_QUERY_SUPPLEMENTAL_CREDS_RESPONSE);

    RtlCopyMemory(
        Where,
        UserName->Buffer,
        UserName->MaximumLength
        );

    LocalCred->ReturnedCreds.Cred.UserName = (LPWSTR) Where;
    Where += ROUND_UP_COUNT(UserName->MaximumLength, ALIGN_LPDWORD);

    RtlCopyMemory(
        Where,
        TargetName->Buffer,
        TargetName->MaximumLength
        );

    LocalCred->ReturnedCreds.Cred.TargetName = (LPWSTR) Where;

    Where += ROUND_UP_COUNT(TargetName->MaximumLength, ALIGN_LPDWORD);

    RtlCopyMemory(
            Where,
            NtlmCred->Credentials,
            NtlmCred->CredentialSize
            );

    LocalCred->ReturnedCreds.ClearCredentialBlobSize = NtlmCred->CredentialSize;
    LocalCred->ReturnedCreds.Cred.CredentialBlob = Where;
    LocalCred->ReturnedCreds.Cred.CredentialBlobSize = NtlmCred->CredentialSize;

    LsaFunctions->LsaProtectMemory(
                    LocalCred->ReturnedCreds.Cred.CredentialBlob,
                    (ROUND_UP_COUNT(NtlmCred->CredentialSize, DESX_BLOCKLEN))
                    );


    LocalCred->ReturnedCreds.Cred.Flags = CRED_FLAGS_OWF_CRED_BLOB;
    LocalCred->ReturnedCreds.Cred.Type = CRED_TYPE_DOMAIN_PASSWORD;
    LocalCred->ReturnedCreds.Cred.Persist = CRED_PERSIST_SESSION;

    *MarshalledCred = LocalCred;
    LocalCred = NULL;
    *Size = LocalSize;

Cleanup:

    if (LocalCred)
    {
        KerbFree(LocalCred);
    }


    return Status;
}

//+-------------------------------------------------------------------------
//
//  Function:   KerbRetrieveOWF
//
//  Synopsis:   Converts a smartcard credential into a credential containing
//              the NT_OWF.
//
//  Arguments:  NtlmCred - Supplemental cred from PAC
//              MarshalledCred - credential being created.
//
//  Requires:
//
//  Returns:
//
//  Notes:
//
//
//--------------------------------------------------------------------------
NTSTATUS
KerbRetrieveOWF(
    IN PKERB_LOGON_SESSION LogonSession,
    IN PKERB_CREDENTIAL    Credential,
    IN PKERB_CREDMAN_CRED  CredmanCred,
    IN PUNICODE_STRING     CredTargetName,
    IN OUT PKERB_QUERY_SUPPLEMENTAL_CREDS_RESPONSE * Response,
    IN OUT PULONG                   ResponseSize
    )
{
    NTSTATUS Status;
    ULONG    i;

    PSECPKG_SUPPLEMENTAL_CRED_ARRAY     PacCreds = NULL;
    PSECPKG_SUPPLEMENTAL_CRED           NtlmCred = NULL;
    PKERB_TICKET_CACHE_ENTRY            NewTicket = NULL;
    PKERB_TICKET_CACHE_ENTRY            Tgt = NULL;
    UNICODE_STRING                      TempName = {0};
    UNICODE_STRING                      UserName = {0};
    UNICODE_STRING                      Package = {0};
    BOOLEAN                             CrossRealm = FALSE;
    LPWSTR                              tmp = NULL;
    KERB_TGT_REPLY                      TgtReply = {0};
    PKERB_INTERNAL_NAME                 TargetName = NULL;
    PNETLOGON_VALIDATION_SAM_INFO3      ValidationInfo = NULL;
    ULONG Size;

    PKERB_QUERY_SUPPLEMENTAL_CREDS_RESPONSE LocalResponse = NULL;

    *Response = NULL;
    *ResponseSize = 0;

    //
    // First get a TGT for U2U
    //
    KerbReadLockLogonSessions( LogonSession );
    
    Status = KerbGetTgtForService(
                LogonSession,
                Credential,
                CredmanCred,
                NULL,
                &TempName,  // no target realm
                KERB_TICKET_CACHE_PRIMARY_TGT,
                &Tgt,
                &CrossRealm
                );

    KerbUnlockLogonSessions( LogonSession );

    if (!NT_SUCCESS(Status))
    {
        DebugLog((DEB_ERROR, "KerbRetrieveOWF failed to get TGT: %#x\n", Status));
        goto Cleanup;
    }

    if (CrossRealm)
    {
        DsysAssert(CrossRealm == FALSE);
        Status = STATUS_INTERNAL_ERROR;
        goto Cleanup;
    }

    TgtReply.version = KERBEROS_VERSION;
    TgtReply.message_type = KRB_TGT_REP;
    TgtReply.ticket = Tgt->Ticket;

    DsysAssert(CredmanCred->CredmanDomainName.Length == 0);

    if (!KERB_SUCCESS(KerbConvertStringToKdcName(
        &TargetName,
        &CredmanCred->CredmanUserName
        )))
    {
        Status = STATUS_NO_MEMORY;
        goto Cleanup;
    }


    //
    // HACK HACK
    // KerbConvertStringToKdcName builds a bogus name type.
    //
    TargetName->NameType = KRB_NT_ENTERPRISE_PRINCIPAL;

    Status = KerbGetServiceTicket(
                LogonSession,
                Credential,
                CredmanCred,
                TargetName, // should be a UPN
                &Tgt->ClientDomainName,
                NULL,
                0,
                0,
                0,
                NULL,
                NULL,
                &TgtReply,
                &NewTicket,
                NULL
                );

    if (!NT_SUCCESS( Status ))
    {
        DebugLog((DEB_ERROR, "KerbGetServiceTicket failed - %x\n", Status ));
        goto Cleanup;
    }

    //
    // Pull the supplemental creds from the ticket.
    //
    Status = KerbGetCredsFromU2UTicket(
                NewTicket,
                Tgt,
                &PacCreds,
                &ValidationInfo
                );

    if (!NT_SUCCESS( Status))
    {
        DebugLog((DEB_ERROR, "KerbGetCredsFromTicket failed %x\n", Status));
        goto Cleanup;
    }

    RtlInitUnicodeString(
        &Package,
        NTLMSP_NAME
        );

    for ( i = 0; i < PacCreds->CredentialCount; i++ )
    {
        if (RtlEqualUnicodeString(
                &PacCreds->Credentials[i].PackageName,
                &Package,
                TRUE
                ))
        {
            NtlmCred = &PacCreds->Credentials[i];
            break;
        }
    }


    if (NtlmCred == NULL || ValidationInfo == NULL)
    {
        DebugLog((DEB_ERROR, "No NTLM creds %p or ValidationInfo %p found in PAC\n", NtlmCred, ValidationInfo));
        Status = STATUS_NOT_FOUND;
        DsysAssert(FALSE);
        goto Cleanup;
    }

    UserName.MaximumLength = ValidationInfo->EffectiveName.Length + ValidationInfo->LogonDomainName.Length + (2 * sizeof(WCHAR));
    UserName.Length = UserName.MaximumLength - sizeof(WCHAR);

    SafeAllocaAllocate(UserName.Buffer, UserName.MaximumLength);
    if (UserName.Buffer == NULL)
    {
        Status = STATUS_NO_MEMORY;
        goto Cleanup;
    }

    RtlZeroMemory(UserName.Buffer, UserName.MaximumLength);

    //
    // ntlm accepts empty domain name, therefore "\username" is valid
    //

    tmp = UserName.Buffer;

    RtlCopyMemory(
        tmp,
        ValidationInfo->LogonDomainName.Buffer,
        ValidationInfo->LogonDomainName.Length
        );

    tmp += (ValidationInfo->LogonDomainName.Length / sizeof(WCHAR));

    *tmp = L'\\';
    tmp++;

    RtlCopyMemory(
        tmp,
        ValidationInfo->EffectiveName.Buffer,
        ValidationInfo->EffectiveName.Length
        );

    //
    // Build the resultant CREDENTIAL for MSV.
    //

    Status = KerbMarshallMSVCredential(
                NtlmCred,
                &UserName,
                CredTargetName,
                &LocalResponse,
                &Size
                );

    if (!NT_SUCCESS( Status ))
    {
        DebugLog((DEB_ERROR, "KerbMarshalMSVCredential failed %x\n", Status));
        goto Cleanup;
    }

    *Response = LocalResponse;
    LocalResponse = NULL;

    *ResponseSize = Size;

Cleanup:

    if ( PacCreds )
    {
        MIDL_user_free( PacCreds );
    }


    if ( ValidationInfo )
    {
        MIDL_user_free( ValidationInfo );
    }

    SafeAllocaFree( UserName.Buffer );
    KerbFreeString( &TempName );

    if ( TargetName )
    {
        KerbFreeKdcName( &TargetName );
    }

    if ( NewTicket )
    {
        KerbDereferenceTicketCacheEntry( NewTicket );
    }

    if ( LocalResponse )
    {
        KerbFree(LocalResponse);
    }

    return Status;
}

//+-------------------------------------------------------------------------
//
//  Function:   KerbTicklePackage
//
//  Synopsis:
//
//  Effects:
//
//  Arguments:
//
//  Requires:   Readlock logon session
//
//  Returns:
//
//  Notes:  In order to optimize perf, we order this 1. current password,
//  2. "extra" credentials, 3. old passwords
//
//
//--------------------------------------------------------------------------
NTSTATUS
KerbTicklePackage(
    IN PKERB_LOGON_SESSION LogonSession,
    IN PUNICODE_STRING CredentialBlob
    )
{
    NTSTATUS                    Status;
    PKERB_PRIMARY_CREDENTIAL    CertCred = NULL;
    PKERB_CREDMAN_CRED          CredmanCred = NULL;
    UNICODE_STRING              TargetName;
    LPWSTR                      CredBlob = NULL;
    HANDLE                      OldToken = NULL, ClientToken = NULL;


    //
    // Fester:
    // If we ever extend this, we may need to change the value here.
    // For now, its just the *session
    //
    RtlInitUnicodeString(
        &TargetName,
        CRED_SESSION_WILDCARD_NAME_W
        );

    //
    // Make sure we pass a NULL terminated cred
    //
    SafeAllocaAllocate( CredBlob, ( CredentialBlob->MaximumLength + sizeof(WCHAR)));
    if ( CredBlob == NULL )
    {
        Status = STATUS_NO_MEMORY;
        goto Cleanup;
    }

    RtlZeroMemory( CredBlob, ( CredentialBlob->MaximumLength + sizeof(WCHAR)));
    RtlCopyMemory( CredBlob, CredentialBlob->Buffer, CredentialBlob->Length );


    //
    // Got to be impersonating to make this call...
    //
    Status = NtOpenThreadToken(
                NtCurrentThread(),
                TOKEN_QUERY | TOKEN_IMPERSONATE,
                TRUE,
                &OldToken
                );

    if (!NT_SUCCESS( Status ) && Status != STATUS_NO_TOKEN )
    {
        DebugLog((DEB_ERROR, "NtOpenThreadToken failed %x\n", Status));
        goto Cleanup;
    }

    Status = LsaFunctions->OpenTokenByLogonId(
                &LogonSession->LogonId,
                &ClientToken
                );

    if (!NT_SUCCESS(Status))
    {
        D_DebugLog((DEB_ERROR,"Unable to get the client token handle.\n"));
        goto Cleanup;
    }

    if(!SetThreadToken(NULL, ClientToken))
    {
        D_DebugLog((DEB_ERROR,"Unable to impersonate the client token handle.\n"));
        Status = STATUS_CANNOT_IMPERSONATE;
        goto Cleanup;
    }

    Status = KerbConvertCertCredential(
                LogonSession,
                CredBlob,
                &TargetName,
                &CertCred
                );

    if (!NT_SUCCESS( Status ))
    {
        D_DebugLog((DEB_ERROR, "Failed to convert cert cred %x\n", Status));
        goto Cleanup;
    }       
            
    KerbReadLockLogonSessions(LogonSession);

    Status = KerbAddCredmanCredToLogonSession(
                LogonSession,
                CertCred,  // note: freed by this fn, if necessary...
                RAS_CREDENTIAL,
                &CredmanCred
                );

    KerbUnlockLogonSessions(LogonSession);

    if (!NT_SUCCESS( Status ))
    {
        D_DebugLog((DEB_ERROR, "Failed to add credman cred %x\n", Status));
        goto Cleanup;
    }

Cleanup:

    if ( OldToken )
    {
        if (!SetThreadToken( NULL, OldToken ))
        {
            D_DebugLog((DEB_ERROR,"Unable to impersonate the client token handle.\n"));
            Status = STATUS_CANNOT_IMPERSONATE;
        }

        CloseHandle( OldToken );
    }
    else
    {
        RevertToSelf();
    }

    if ( ClientToken )
    {
        CloseHandle( ClientToken );

    }


    SafeAllocaFree( CredBlob );

    if ( CredmanCred )
    {
       KerbDereferenceCredmanCred(
            CredmanCred,
            &LogonSession->CredmanCredentials
            );
    }

    return Status;
}