/*
   Bacula(R) - The Network Backup Solution

   Copyright (C) 2000-2020 Kern Sibbald

   The original author of Bacula is Kern Sibbald, with contributions
   from many others, a complete list can be found in the file AUTHORS.

   You may use this file and others of this release according to the
   license defined in the LICENSE file, which includes the Affero General
   Public License, v3.0 ("AGPLv3") and some additional permissions and
   terms pursuant to its AGPLv3 Section 7.

   This notice must be preserved when any source code is
   conveyed and/or propagated.

   Bacula(R) is a registered trademark of Kern Sibbald.
*/
/*
 *  Enable backup privileges for Win32 systems.
 *
 *    Kern Sibbald, May MMIII
 *
 */

#include "bacula.h"
#include "find.h"
#include "jcr.h"


/*=============================================================*/
/*                                                             */
/*                 * * *  U n i x * * * *                      */
/*                                                             */
/*=============================================================*/

#if !defined(HAVE_WIN32)

int enable_backup_privileges(JCR *jcr, int ignore_errors)
 { return 0; }


#endif



/*=============================================================*/
/*                                                             */
/*                 * * *  W i n 3 2 * * * *                    */
/*                                                             */
/*=============================================================*/

#if defined(HAVE_WIN32)

void win_error(JCR *jcr, const char *prefix, DWORD lerror);

static int
enable_priv(JCR *jcr, HANDLE hToken, const char *name, int ignore_errors)
{
    TOKEN_PRIVILEGES tkp;
    DWORD lerror;

    if (!(p_LookupPrivilegeValue && p_AdjustTokenPrivileges)) {
       return 0;                      /* not avail on this OS */
    }

    // Get the LUID for the security privilege.
    if (!p_LookupPrivilegeValue(NULL, name,  &tkp.Privileges[0].Luid)) {
       win_error(jcr, "LookupPrivilegeValue", GetLastError());
       return 0;
    }

    /* Set the security privilege for this process. */
    tkp.PrivilegeCount = 1;
    tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
    p_AdjustTokenPrivileges(hToken, FALSE, &tkp, sizeof(TOKEN_PRIVILEGES), NULL, NULL);
    lerror = GetLastError();
    if (lerror != ERROR_SUCCESS) {
       if (!ignore_errors) {
          char buf[200];
          strcpy(buf, _("AdjustTokenPrivileges set "));
          bstrncat(buf, name, sizeof(buf));
          win_error(jcr, buf, lerror);
       }
       return 0;
    }
    return 1;
}

/*
 * Setup privileges we think we will need.  We probably do not need
 *  the SE_SECURITY_NAME, but since nothing seems to be working,
 *  we get it hoping to fix the problems.
 */
int enable_backup_privileges(JCR *jcr, int ignore_errors)
{
    HANDLE hToken, hProcess;
    int stat = 0;

    if (!p_OpenProcessToken) {
       return 0;                      /* No avail on this OS */
    }

    hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, GetCurrentProcessId());

    // Get a token for this process.
    if (!p_OpenProcessToken(hProcess,
            TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken)) {
       if (!ignore_errors) {
          win_error(jcr, "OpenProcessToken", GetLastError());
       }
       /* Forge on anyway */
    }

    /* Return a bit map of permissions set. */
    if (enable_priv(jcr, hToken, SE_BACKUP_NAME, ignore_errors)) {
       stat |= 1<<1;
    }
    if (enable_priv(jcr, hToken, SE_RESTORE_NAME, ignore_errors)) {
       stat |= 1<<2;
    }
    if (enable_priv(jcr, hToken, SE_SECURITY_NAME, ignore_errors)) {
       stat |= 1<<0;
    }
    if (enable_priv(jcr, hToken, SE_TAKE_OWNERSHIP_NAME, ignore_errors)) {
       stat |= 1<<3;
    }
    if (enable_priv(jcr, hToken, SE_ASSIGNPRIMARYTOKEN_NAME, ignore_errors)) {
       stat |= 1<<4;
    }
    if (enable_priv(jcr, hToken, SE_SYSTEM_ENVIRONMENT_NAME, ignore_errors)) {
       stat |= 1<<5;
    }
    if (enable_priv(jcr, hToken, SE_CREATE_TOKEN_NAME, ignore_errors)) {
       stat |= 1<<6;
    }
    if (enable_priv(jcr, hToken, SE_MACHINE_ACCOUNT_NAME, ignore_errors)) {
       stat |= 1<<7;
    }
    if (enable_priv(jcr, hToken, SE_TCB_NAME, ignore_errors)) {
       stat |= 1<<8;
    }
    if (enable_priv(jcr, hToken, SE_CREATE_PERMANENT_NAME, ignore_errors)) {
       stat |= 1<<10;
    }

    if (stat) {
       stat |= 1<<9;
    }

    CloseHandle(hToken);
    CloseHandle(hProcess);
    return stat;
}

#endif  /* HAVE_WIN32 */
