// Berkeley Open Infrastructure for Network Computing
// http://boinc.berkeley.edu
// Copyright (C) 2005 University of California
//
// This 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 software 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.
//
// To view the GNU Lesser General Public License visit
// http://www.gnu.org/copyleft/lesser.html
// or write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//

#include "stdafx.h"
#include "boinccas.h"
#include "CASetPermissionBOINCData.h"
#include "dirops.h"

#define CUSTOMACTION_NAME               _T("CASetPermissionBOINCData")
#define CUSTOMACTION_PROGRESSTITLE      _T("Setting permissions on the BOINC Data directory.")


/////////////////////////////////////////////////////////////////////
// 
// Function:    
//
// Description: 
//
/////////////////////////////////////////////////////////////////////
CASetPermissionBOINCData::CASetPermissionBOINCData(MSIHANDLE hMSIHandle) :
    BOINCCABase(hMSIHandle, CUSTOMACTION_NAME, CUSTOMACTION_PROGRESSTITLE)
{}


/////////////////////////////////////////////////////////////////////
// 
// Function:    
//
// Description: 
//
/////////////////////////////////////////////////////////////////////
CASetPermissionBOINCData::~CASetPermissionBOINCData()
{
    BOINCCABase::~BOINCCABase();
}


/////////////////////////////////////////////////////////////////////
// 
// Function:    
//
// Description: 
//
/////////////////////////////////////////////////////////////////////
UINT CASetPermissionBOINCData::OnExecution()
{
    DWORD               dwRes = 0;
    PACL                pACL = NULL;
    ULONGLONG           rgSidSY[(SECURITY_MAX_SID_SIZE+sizeof(ULONGLONG)-1)/sizeof(ULONGLONG)]={0};
    ULONGLONG           rgSidBA[(SECURITY_MAX_SID_SIZE+sizeof(ULONGLONG)-1)/sizeof(ULONGLONG)]={0};
    ULONGLONG           rgSidBU[(SECURITY_MAX_SID_SIZE+sizeof(ULONGLONG)-1)/sizeof(ULONGLONG)]={0};
    PSID                pInstallingUserSID = NULL;
    DWORD               dwSidSize;
    EXPLICIT_ACCESS     ea[6];
    ULONG               ulEntries = 0;
    tstring             strUserSID;
    tstring             strBOINCAdminsGroupAlias;
    tstring             strBOINCUsersGroupAlias;
    tstring             strBOINCProjectsGroupAlias;
    tstring             strBOINCDataDirectory;
    tstring             strEnableProtectedApplicationExecution;
    tstring             strEnableUseByAllUsers;
    UINT                uiReturnValue;

    uiReturnValue = GetProperty( _T("UserSID"), strUserSID );
    if ( uiReturnValue ) return uiReturnValue;

    uiReturnValue = GetProperty( _T("BOINC_ADMINS_GROUPNAME"), strBOINCAdminsGroupAlias );
    if ( uiReturnValue ) return uiReturnValue;

    uiReturnValue = GetProperty( _T("BOINC_USERS_GROUPNAME"), strBOINCUsersGroupAlias );
    if ( uiReturnValue ) return uiReturnValue;

    uiReturnValue = GetProperty( _T("BOINC_PROJECTS_GROUPNAME"), strBOINCProjectsGroupAlias );
    if ( uiReturnValue ) return uiReturnValue;

    uiReturnValue = GetProperty( _T("DATADIR"), strBOINCDataDirectory );
    if ( uiReturnValue ) return uiReturnValue;

    uiReturnValue = GetProperty( _T("ENABLEPROTECTEDAPPLICATIONEXECUTION3"), strEnableProtectedApplicationExecution );
    if ( uiReturnValue ) return uiReturnValue;

    uiReturnValue = GetProperty( _T("ENABLEUSEBYALLUSERS"), strEnableUseByAllUsers );
    if ( uiReturnValue ) return uiReturnValue;


    // Initialize an EXPLICIT_ACCESS structure for all ACEs.
    ZeroMemory(&ea, 6 * sizeof(EXPLICIT_ACCESS));

    // Create a SID for the SYSTEM.
    dwSidSize = sizeof( rgSidSY );
    if(!CreateWellKnownSid(WinLocalSystemSid, NULL, rgSidSY, &dwSidSize))
    {
        LogMessage(
            INSTALLMESSAGE_ERROR,
            NULL, 
            NULL,
            NULL,
            GetLastError(),
            _T("CreateWellKnownSid Error for SYSTEM")
        );
        return ERROR_INSTALL_FAILURE;
    }

    // Create a SID for the Administrators group.
    dwSidSize = sizeof( rgSidBA );
    if(!CreateWellKnownSid(WinBuiltinAdministratorsSid, NULL, rgSidBA, &dwSidSize))
    {
        LogMessage(
            INSTALLMESSAGE_ERROR,
            NULL, 
            NULL,
            NULL,
            GetLastError(),
            _T("CreateWellKnownSid Error for BUILTIN\\Administrators")
        );
        return ERROR_INSTALL_FAILURE;
    }

    // Create a SID for the Users group.
    dwSidSize = sizeof( rgSidBU );
    if(!CreateWellKnownSid(WinBuiltinUsersSid, NULL, rgSidBU, &dwSidSize))
    {
        LogMessage(
            INSTALLMESSAGE_ERROR,
            NULL, 
            NULL,
            NULL,
            GetLastError(),
            _T("CreateWellKnownSid Error for BUILTIN\\Users")
        );
        return ERROR_INSTALL_FAILURE;
    }

    // Create a SID for the current logged in user.
    if(!ConvertStringSidToSid(strUserSID.c_str(), &pInstallingUserSID)) 
    {
        LogMessage(
            INSTALLMESSAGE_ERROR,
            NULL, 
            NULL,
            NULL,
            GetLastError(),
            _T("ConvertStringSidToSid Error for Installing User")
        );
        return ERROR_INSTALL_FAILURE;
    }

    // Handle the non-service install scenario
    //
    if (_T("1") != strEnableProtectedApplicationExecution) {

        ulEntries = 3;

        // SYSTEM
        ea[0].grfAccessPermissions = GENERIC_ALL;
        ea[0].grfAccessMode = SET_ACCESS;
        ea[0].grfInheritance = SUB_CONTAINERS_AND_OBJECTS_INHERIT;
        ea[0].Trustee.TrusteeForm = TRUSTEE_IS_SID;
        ea[0].Trustee.TrusteeType = TRUSTEE_IS_WELL_KNOWN_GROUP;
        ea[0].Trustee.ptstrName = (LPTSTR)rgSidSY;

        // Administrators
        ea[1].grfAccessPermissions = GENERIC_ALL;
        ea[1].grfAccessMode = SET_ACCESS;
        ea[1].grfInheritance = SUB_CONTAINERS_AND_OBJECTS_INHERIT;
        ea[1].Trustee.TrusteeForm = TRUSTEE_IS_SID;
        ea[1].Trustee.TrusteeType = TRUSTEE_IS_WELL_KNOWN_GROUP;
        ea[1].Trustee.ptstrName = (LPTSTR)rgSidBA;

        // Installing User
        ea[2].grfAccessPermissions = GENERIC_ALL;
        ea[2].grfAccessMode = SET_ACCESS;
        ea[2].grfInheritance = SUB_CONTAINERS_AND_OBJECTS_INHERIT;
        ea[2].Trustee.TrusteeForm = TRUSTEE_IS_SID;
        ea[2].Trustee.TrusteeType = TRUSTEE_IS_USER;
        ea[2].Trustee.ptstrName = (LPTSTR)pInstallingUserSID;

        // Users
        if (_T("1") == strEnableUseByAllUsers) {
            ulEntries = 4;

            ea[3].grfAccessPermissions = GENERIC_ALL;
            ea[3].grfAccessMode = SET_ACCESS;
            ea[3].grfInheritance= SUB_CONTAINERS_AND_OBJECTS_INHERIT;
            ea[3].Trustee.TrusteeForm = TRUSTEE_IS_SID;
            ea[3].Trustee.TrusteeType = TRUSTEE_IS_WELL_KNOWN_GROUP;
            ea[3].Trustee.ptstrName  = (LPTSTR)rgSidBU;
        }

    } else {

        ulEntries = 5;

        // SYSTEM
        ea[0].grfAccessPermissions = GENERIC_ALL;
        ea[0].grfAccessMode = SET_ACCESS;
        ea[0].grfInheritance = SUB_CONTAINERS_AND_OBJECTS_INHERIT;
        ea[0].Trustee.TrusteeForm = TRUSTEE_IS_SID;
        ea[0].Trustee.TrusteeType = TRUSTEE_IS_WELL_KNOWN_GROUP;
        ea[0].Trustee.ptstrName = (LPTSTR)rgSidSY;

        // Administrators
        ea[1].grfAccessPermissions = GENERIC_ALL;
        ea[1].grfAccessMode = SET_ACCESS;
        ea[1].grfInheritance = SUB_CONTAINERS_AND_OBJECTS_INHERIT;
        ea[1].Trustee.TrusteeForm = TRUSTEE_IS_SID;
        ea[1].Trustee.TrusteeType = TRUSTEE_IS_WELL_KNOWN_GROUP;
        ea[1].Trustee.ptstrName = (LPTSTR)rgSidBA;

        // boinc_admins
        ea[2].grfAccessPermissions = GENERIC_ALL;
        ea[2].grfAccessMode = SET_ACCESS;
        ea[2].grfInheritance = SUB_CONTAINERS_AND_OBJECTS_INHERIT;
        ea[2].Trustee.TrusteeForm = TRUSTEE_IS_NAME;
        ea[2].Trustee.TrusteeType = TRUSTEE_IS_GROUP;
        ea[2].Trustee.ptstrName = (LPTSTR)strBOINCAdminsGroupAlias.c_str();

        // boinc_users
        ea[3].grfAccessPermissions = GENERIC_READ|GENERIC_EXECUTE;
        ea[3].grfAccessMode = SET_ACCESS;
        ea[3].grfInheritance = SUB_CONTAINERS_AND_OBJECTS_INHERIT;
        ea[3].Trustee.TrusteeForm = TRUSTEE_IS_NAME;
        ea[3].Trustee.TrusteeType = TRUSTEE_IS_GROUP;
        ea[3].Trustee.ptstrName = (LPTSTR)strBOINCUsersGroupAlias.c_str();

        // boinc_projects
        ea[4].grfAccessPermissions = FILE_TRAVERSE;
        ea[4].grfAccessMode = SET_ACCESS;
        ea[4].grfInheritance = SUB_CONTAINERS_AND_OBJECTS_INHERIT;
        ea[4].Trustee.TrusteeForm = TRUSTEE_IS_NAME;
        ea[4].Trustee.TrusteeType = TRUSTEE_IS_GROUP;
        ea[4].Trustee.ptstrName = (LPTSTR)strBOINCProjectsGroupAlias.c_str();

        // Users
        if (_T("1") == strEnableUseByAllUsers) {
            ulEntries = 6;

            ea[5].grfAccessPermissions = GENERIC_READ|GENERIC_EXECUTE;
            ea[5].grfAccessMode = SET_ACCESS;
            ea[5].grfInheritance= SUB_CONTAINERS_AND_OBJECTS_INHERIT;
            ea[5].Trustee.TrusteeForm = TRUSTEE_IS_SID;
            ea[5].Trustee.TrusteeType = TRUSTEE_IS_WELL_KNOWN_GROUP;
            ea[5].Trustee.ptstrName  = (LPTSTR)rgSidBU;
        }

    }

    // Create a new ACL that contains the new ACEs.
    dwRes = SetEntriesInAcl(ulEntries, &ea[0], NULL, &pACL);
    if (ERROR_SUCCESS != dwRes) 
    {
        LogMessage(
            INSTALLMESSAGE_INFO,
            NULL, 
            NULL,
            NULL,
            GetLastError(),
            _T("SetEntriesInAcl Error")
        );
        LogMessage(
            INSTALLMESSAGE_ERROR,
            NULL, 
            NULL,
            NULL,
            GetLastError(),
            _T("SetEntriesInAcl Error")
        );
        return ERROR_INSTALL_FAILURE;
    }

    // Set the ACL on the Data Directory itself.
    dwRes = SetNamedSecurityInfo( 
        (LPWSTR)strBOINCDataDirectory.c_str(),
        SE_FILE_OBJECT,
        DACL_SECURITY_INFORMATION | PROTECTED_DACL_SECURITY_INFORMATION,
        NULL,
        NULL,
        pACL,
        NULL
    );
    if (ERROR_SUCCESS != dwRes) 
    {
        LogMessage(
            INSTALLMESSAGE_INFO,
            NULL, 
            NULL,
            NULL,
            GetLastError(),
            _T("SetNamedSecurityInfo Error")
        );
        LogMessage(
            INSTALLMESSAGE_ERROR,
            NULL, 
            NULL,
            NULL,
            GetLastError(),
            _T("SetNamedSecurityInfo Error")
        );
        return ERROR_INSTALL_FAILURE;
    }

    // Set ACLs on all files and sub folders.
    RecursiveSetPermissions(strBOINCDataDirectory, pACL);


    if (pACL) 
        LocalFree(pACL);
    if (pInstallingUserSID != NULL) 
        FreeSid(pInstallingUserSID);

    return ERROR_SUCCESS;
}


/////////////////////////////////////////////////////////////////////
// 
// Function:    SetPermissionBOINCData
//
// Description: 
//
/////////////////////////////////////////////////////////////////////
UINT __stdcall SetPermissionBOINCData(MSIHANDLE hInstall)
{
    UINT uiReturnValue = 0;

    CASetPermissionBOINCData* pCA = new CASetPermissionBOINCData(hInstall);
    uiReturnValue = pCA->Execute();
    delete pCA;

    return uiReturnValue;
}