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109 lines
2.9 KiB
109 lines
2.9 KiB
/*
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This file is part of the TDE project
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Copyright (C) 2011 Timothy Pearson <kb9vqf@pearsoncomputing.net>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <dirent.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/select.h>
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#include <sys/time.h>
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#include <termios.h>
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#include <signal.h>
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#include <tqstring.h>
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#include "config.h"
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#define FIFO_FILE "/tmp/ksocket-global/tsak"
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// #define DEBUG
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int main (int argc, char *argv[])
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{
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int mPipe_fd;
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char readbuf[128];
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int numread;
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pid_t parentproc = getppid();
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#ifdef DEBUG
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printf("Parent pid is: %d\n\r", parentproc);
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#endif
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char parentexecutable[8192];
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TQString procparent = TQString("/proc/%1/exe").arg(parentproc);
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int chars = readlink(procparent.ascii(), parentexecutable, sizeof(parentexecutable));
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parentexecutable[chars] = 0;
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parentexecutable[8191] = 0;
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procparent = parentexecutable;
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#ifdef DEBUG
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printf("Parent executable name and full path is: %s\n\r", procparent.ascii());
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#endif
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TQString tdeBinaryPath = TQString(KDE_BINDIR "/");
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#ifdef DEBUG
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printf("The TDE binary path is: %s\n\r", tdeBinaryPath.ascii());
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#endif
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if (!procparent.startsWith(tdeBinaryPath)) {
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printf("Unauthorized path detected in calling process\n\r");
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return 2;
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}
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else {
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procparent = procparent.mid(tdeBinaryPath.length());
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#ifdef DEBUG
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printf("Parent executable name is: %s\n\r", procparent.ascii());
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#endif
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if ((procparent == "ksmserver") || (procparent == "kdesktop_lock") || (procparent == "kdm")) {
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// OK, the calling process is authorized to retrieve SAK data
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// First, flush the buffer
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mPipe_fd = open(FIFO_FILE, O_RDWR | O_NONBLOCK);
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numread = 1;
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while (numread > 0) {
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numread = read(mPipe_fd, readbuf, 128);
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}
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// Now wait for SAK press
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mPipe_fd = open(FIFO_FILE, O_RDWR);
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if (mPipe_fd > -1) {
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numread = read(mPipe_fd, readbuf, 128);
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readbuf[numread] = 0;
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readbuf[127] = 0;
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close(mPipe_fd);
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if (strcmp(readbuf, "SAK\n\r") == 0) {
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return 0;
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}
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else {
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return 1;
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}
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}
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}
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else {
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printf("Unauthorized calling process detected\n\r");
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return 3;
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}
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}
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return 4;
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} |