You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
144 lines
3.8 KiB
144 lines
3.8 KiB
/*
|
|
This file is part of the TDE project
|
|
Copyright (C) 2011 Timothy Pearson <kb9vqf@pearsoncomputing.net>
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public License
|
|
along with this library; see the file COPYING.LIB. If not, write to
|
|
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <limits.h>
|
|
#include <dirent.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/select.h>
|
|
#include <sys/time.h>
|
|
#include <termios.h>
|
|
#include <signal.h>
|
|
|
|
#include <tqstring.h>
|
|
|
|
#include "config.h"
|
|
|
|
// #define DEBUG
|
|
|
|
inline int tde_sak_verify_calling_process()
|
|
{
|
|
bool authorized = false;
|
|
|
|
// Root always has access to everything...
|
|
if (getuid() == 0) {
|
|
return 0;
|
|
}
|
|
|
|
pid_t parentproc = getppid();
|
|
#ifdef DEBUG
|
|
printf("Parent pid is: %d\n\r", parentproc);
|
|
#endif
|
|
|
|
char parentexecutable[8192];
|
|
TQString procparent = TQString("/proc/%1/exe").arg(parentproc);
|
|
int chars = readlink(procparent.ascii(), parentexecutable, sizeof(parentexecutable));
|
|
parentexecutable[chars] = 0;
|
|
parentexecutable[8191] = 0;
|
|
procparent = parentexecutable;
|
|
#ifdef DEBUG
|
|
printf("Parent executable name and full path is: %s\n\r", procparent.ascii());
|
|
#endif
|
|
|
|
TQString tdeBinaryPath = TQString(KDE_BINDIR "/");
|
|
#ifdef DEBUG
|
|
printf("The TDE binary path is: %s\n\r", tdeBinaryPath.ascii());
|
|
#endif
|
|
|
|
if (!procparent.startsWith(tdeBinaryPath)) {
|
|
printf("Unauthorized path detected in calling process\n\r");
|
|
return 2;
|
|
}
|
|
else {
|
|
procparent = procparent.mid(tdeBinaryPath.length());
|
|
#ifdef DEBUG
|
|
printf("Parent executable name is: %s\n\r", procparent.ascii());
|
|
#endif
|
|
if ((procparent == "kdesktop") || (procparent == "kdesktop_lock") || (procparent == "kdm")) {
|
|
authorized = true;
|
|
}
|
|
else if (procparent == "tdeinit") {
|
|
printf("tdeinit detected\n\r");
|
|
// A bit more digging is needed to see if this is an authorized process or not
|
|
// Get the tdeinit command
|
|
char tdeinitcmdline[8192];
|
|
FILE *fp = fopen(TQString("/proc/%1/cmdline").arg(parentproc).ascii(),"r");
|
|
if (fp != NULL) {
|
|
if (fgets (tdeinitcmdline, 8192, fp) != NULL)
|
|
fclose (fp);
|
|
}
|
|
tdeinitcmdline[8191] = 0;
|
|
TQString tdeinitCommand = tdeinitcmdline;
|
|
|
|
// Also get the environment, specifically the path
|
|
TQString tdeinitEnvironment;
|
|
char tdeinitenviron[8192];
|
|
fp = fopen(TQString("/proc/%1/environ").arg(parentproc).ascii(),"r");
|
|
if (fp != NULL) {
|
|
int c;
|
|
int pos = 0;
|
|
do {
|
|
c = fgetc(fp);
|
|
tdeinitenviron[pos] = c;
|
|
pos++;
|
|
if (c == 0) {
|
|
TQString curEnvLine = tdeinitenviron;
|
|
if (curEnvLine.startsWith("PATH=")) {
|
|
tdeinitEnvironment = curEnvLine.mid(5);
|
|
}
|
|
pos = 0;
|
|
}
|
|
} while ((c != EOF) && (pos < 8192));
|
|
fclose (fp);
|
|
}
|
|
tdeinitenviron[8191] = 0;
|
|
|
|
#ifdef DEBUG
|
|
printf("Called executable name is: %s\n\r", tdeinitCommand.ascii());
|
|
printf("Environment is: %s\n\r", tdeinitEnvironment.ascii());
|
|
#endif
|
|
|
|
if ((tdeinitCommand == "kdesktop [tdeinit]") && (tdeinitEnvironment.startsWith(KDE_BINDIR))) {
|
|
authorized = true;
|
|
}
|
|
else {
|
|
return 4;
|
|
}
|
|
}
|
|
else {
|
|
printf("Unauthorized calling process detected\n\r");
|
|
return 3;
|
|
}
|
|
|
|
if (authorized == true) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 5;
|
|
}
|
|
|
|
#undef DEBUG |