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89 lines
2.1 KiB
89 lines
2.1 KiB
#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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} |