/* Editor Settings: expandtabs and use 4 spaces for indentation
 * ex: set softtabstop=4 tabstop=8 expandtab shiftwidth=4: *
 * -*- mode: c, c-basic-offset: 4 -*- */

/*
 * Copyright Likewise Software    2004-2008
 * All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the license, or (at
 * your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser
 * General Public License for more details.  You should have received a copy
 * of the GNU Lesser General Public License along with this program.  If
 * not, see <http://www.gnu.org/licenses/>.
 *
 * LIKEWISE SOFTWARE MAKES THIS SOFTWARE AVAILABLE UNDER OTHER LICENSING
 * TERMS AS WELL.  IF YOU HAVE ENTERED INTO A SEPARATE LICENSE AGREEMENT
 * WITH LIKEWISE SOFTWARE, THEN YOU MAY ELECT TO USE THE SOFTWARE UNDER THE
 * TERMS OF THAT SOFTWARE LICENSE AGREEMENT INSTEAD OF THE TERMS OF THE GNU
 * LESSER GENERAL PUBLIC LICENSE, NOTWITHSTANDING THE ABOVE NOTICE.  IF YOU
 * HAVE QUESTIONS, OR WISH TO REQUEST A COPY OF THE ALTERNATE LICENSING
 * TERMS OFFERED BY LIKEWISE SOFTWARE, PLEASE CONTACT LIKEWISE SOFTWARE AT
 * license@likewisesoftware.com
 */

#include "includes.h"
#include "lam-group.h"
#include "lam-user.h"
#include "lam-auth.h"

void
LsaNssClearState(
    PVOID pState
    )
{
    PLSA_NSS_STATE pNssState = (PLSA_NSS_STATE)pState;

    LSA_LOG_PAM_DEBUG("Clearing LAM state");

    if (pNssState != NULL)
    {
        LW_SAFE_FREE_MEMORY(pNssState->pLastGroup);
        LW_SAFE_FREE_MEMORY(pNssState->pLastUser);
        LW_SAFE_FREE_STRING(pNssState->pszRegistryName);
    }
}

PVOID
LsaNssOpen(
    PCSTR pszName,
    PCSTR pszDomain,
    int mode,
    PSTR pszOptions
    )
{
    DWORD dwError = LW_ERROR_SUCCESS;
    PLSA_PAM_CONFIG pConfig = NULL;

    dwError = LsaPamGetConfig(&pConfig);
    BAIL_ON_LSA_ERROR(dwError);

    LsaPamSetLogLevel(pConfig->dwLogLevel);

    LSA_LOG_PAM_DEBUG(
            "Open called for '%s' with options '%s'",
            pszName,
            pszOptions);

    LsaNssClearState(&gNssState);

    dwError = LwAllocateString(
        pszName,
        &gNssState.pszRegistryName);
    BAIL_ON_LSA_ERROR(dwError);

    if (!strcasecmp(pszOptions, "debug"))
    {
        LsaPamSetLogLevel(LSA_PAM_LOG_LEVEL_DEBUG);
    }

cleanup:

    LSA_LOG_PAM_DEBUG("Open finishing with code %d", dwError);
    if (pConfig)
    {
        LsaPamFreeConfig(pConfig);
    }

    if (dwError != LW_ERROR_SUCCESS)
    {
        LsaNssMapErrorCode(dwError, &errno);
        return NULL;
    }
    else
    {
        return &gNssState;
    }

error:

    goto cleanup;
}

int
LsaNssGetEntry(
        PSTR pszKey,
        PSTR pszTable,
        PSTR* ppszAttributes,
        attrval_t* pResults,
        int iAttrCount
        )
{
    DWORD dwError = LW_ERROR_SUCCESS;
    int iIndex = 0;

    LSA_LOG_PAM_DEBUG(
            "Getting %d entry/ies in table '%s' for user '%s",
            iAttrCount,
            pszTable,
            pszKey);

    for (iIndex = 0; iIndex < iAttrCount; iIndex++)
    {
        LSA_LOG_PAM_DEBUG("Attr %d - '%s'",
                iIndex,
                ppszAttributes[iIndex]);
    }

    if (hLsaConnection == (HANDLE)NULL)
    {
        dwError = LsaOpenServer(&hLsaConnection);
        BAIL_ON_LSA_ERROR(dwError);
    }

    if (!strcmp(pszKey, "ALL"))
    {
        if (iAttrCount != 1)
        {
            dwError = EINVAL;
            BAIL_ON_LSA_ERROR(dwError);
        }

        if (!strcmp(pszTable, "user"))
        {
            if (strcmp(ppszAttributes[0], S_USERS))
            {
                dwError = EINVAL;
                BAIL_ON_LSA_ERROR(dwError);
            }
            else
            {
                dwError = LsaNssListUsers(
                        hLsaConnection,
                        &pResults[0]);
                BAIL_ON_LSA_ERROR(dwError);
            }
        }
        else if (!strcmp(pszTable, "group"))
        {
            if (strcmp(ppszAttributes[0], S_GROUPS))
            {
                dwError = EINVAL;
                BAIL_ON_LSA_ERROR(dwError);
            }
            else
            {
                dwError = LsaNssListGroups(
                        hLsaConnection,
                        &pResults[0]);
                BAIL_ON_LSA_ERROR(dwError);
            }
        }
        else
        {
            dwError = EINVAL;
            BAIL_ON_LSA_ERROR(dwError);
        }
    }
    else
    {
        if (!strcmp(pszTable, "user"))
        {
            dwError = LsaNssGetUserAttrs(
                    hLsaConnection,
                    pszKey,
                    ppszAttributes,
                    pResults,
                    iAttrCount);
            BAIL_ON_LSA_ERROR(dwError);
        }
        else if (!strcmp(pszTable, "group"))
        {
            dwError = LsaNssGetGroupAttrs(
                    hLsaConnection,
                    pszKey,
                    ppszAttributes,
                    pResults,
                    iAttrCount);
            BAIL_ON_LSA_ERROR(dwError);
        }
        else
        {
            dwError = EINVAL;
            BAIL_ON_LSA_ERROR(dwError);
        }
    }

cleanup:

    LSA_LOG_PAM_DEBUG("Getentry finishing with code %d", dwError);
    if (dwError != LW_ERROR_SUCCESS)
    {
        LsaNssMapErrorCode(dwError, &errno);
        return -1;
    }
    else
        return 0;

error:
    if (hLsaConnection != (HANDLE)NULL)
    {
        LsaCloseServer(hLsaConnection);
        hLsaConnection = (HANDLE)NULL;
    }

    goto cleanup;
}

attrlist_t **
LsaNssGetSupportedAttrs(
        VOID
        )
{
    static attrlist_t pList[] = {
        {S_ID, AL_GROUPATTR, SEC_INT},
        {S_PWD, AL_GROUPATTR, SEC_CHAR},
        {S_ADMIN, AL_GROUPATTR, SEC_BOOL},
        {S_ADMS, AL_GROUPATTR, SEC_LIST},
        {S_USERS, AL_GROUPATTR, SEC_LIST},
        {"SID", AL_GROUPATTR, SEC_CHAR},

        {S_ID, AL_USERATTR, SEC_INT},
        {S_PGID, AL_USERATTR, SEC_INT},
        {S_PWD, AL_USERATTR, SEC_CHAR},
        {S_HOME, AL_USERATTR, SEC_CHAR},
        {S_SHELL, AL_USERATTR, SEC_CHAR},
        {S_REGISTRY, AL_USERATTR, SEC_CHAR},
        {S_GECOS, AL_USERATTR, SEC_CHAR},
        {S_PGRP, AL_USERATTR, SEC_CHAR},
        {S_GROUPS, AL_USERATTR, SEC_LIST},
        {S_GROUPSIDS, AL_USERATTR, SEC_LIST},
        {S_LOCKED, AL_USERATTR, SEC_BOOL},
        {"SID", AL_USERATTR, SEC_CHAR},
        {"UPN", AL_USERATTR, SEC_CHAR},
    };
    static attrlist_t *ppList[] = {
        &pList[0],
        &pList[1],
        &pList[2],
        &pList[3],
        &pList[4],
        &pList[5],
        &pList[6],
        &pList[7],
        &pList[8],
        &pList[9],
        &pList[10],
        &pList[11],
        &pList[12],
        &pList[13],
        &pList[14],
        &pList[15],
        &pList[16],
        &pList[17],
        &pList[18],
        NULL
    };

    LSA_LOG_PAM_DEBUG("Returning the list of supported LAM attributes");
    return ppList;
}

int
LsaNssInitialize(struct secmethod_table *methods)
{
    memset(methods, 0, sizeof(*methods));
    methods->method_version = SECMETHOD_VERSION_520;
    methods->method_getgrgid = LsaNssGetGrGid;
    methods->method_getgrnam = LsaNssGetGrNam;
    methods->method_getgrset = LsaNssGetGrSet;
    methods->method_getgracct = LsaNssGetGrAcct;
    methods->method_getpwuid = LsaNssGetPwUid;
    methods->method_getpwnam = LsaNssGetPwNam;
    methods->method_getentry = LsaNssGetEntry;
    methods->method_attrlist = LsaNssGetSupportedAttrs;
    methods->method_authenticate = LsaNssAuthenticate;
    methods->method_normalize = LsaNssNormalizeUsername;
    methods->method_open = LsaNssOpen;
    methods->method_close = LsaNssClearState;
    methods->method_passwdexpired = LsaNssIsPasswordExpired;
    methods->method_chpass = LsaNssChangePassword;

    memset(&gNssState, 0, sizeof(gNssState));

    return AUTH_SUCCESS;
}