a95bae9e0a
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@712 ec53bebd-3082-4978-b11e-865c3cabbd6b
143 lines
3.0 KiB
C
143 lines
3.0 KiB
C
#include "kx.h"
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RCSID("$Id$");
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static int
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do_enccopy (int fd1, int fd2, int mode, des_cblock *iv,
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des_key_schedule schedule, int *num)
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{
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int ret;
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u_char buf[BUFSIZ];
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ret = read (fd1, buf, sizeof(buf));
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if (ret == 0)
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return 0;
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if (ret < 0) {
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fprintf (stderr, "%s: read: %s\n", prog, strerror (errno));
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return ret;
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}
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#ifndef NOENCRYPTION
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des_cfb64_encrypt (buf, buf, ret, schedule, iv,
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num, mode);
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#endif
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ret = krb_net_write (fd2, buf, ret);
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if (ret < 0) {
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fprintf (stderr, "%s: write: %s\n", prog, strerror (errno));
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return ret;
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}
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return 1;
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}
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/*
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* Copy data from `fd1' to `fd2', encrypting it. Data in the other
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* direction is of course, decrypted.
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*/
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int
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copy_encrypted (int fd1, int fd2, des_cblock *iv,
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des_key_schedule schedule)
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{
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des_cblock iv1, iv2;
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int num1 = 0, num2 = 0;
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memcpy (&iv1, iv, sizeof(iv1));
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memcpy (&iv2, iv, sizeof(iv2));
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for (;;) {
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fd_set fdset;
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int ret;
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FD_ZERO(&fdset);
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FD_SET(fd1, &fdset);
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FD_SET(fd2, &fdset);
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ret = select (max(fd1, fd2)+1, &fdset, NULL, NULL, NULL);
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if (ret < 0 && errno != EINTR) {
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fprintf (stderr, "%s: select: %s\n", prog, strerror (errno));
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return 1;
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}
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if (FD_ISSET(fd1, &fdset)) {
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ret = do_enccopy (fd1, fd2, DES_ENCRYPT, &iv1, schedule, &num1);
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if (ret <= 0)
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return ret;
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}
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if (FD_ISSET(fd2, &fdset)) {
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ret = do_enccopy (fd2, fd1, DES_DECRYPT, &iv2, schedule, &num2);
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if (ret <= 0)
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return ret;
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}
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}
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}
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/*
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* Signal handler that justs waits for the children when they die.
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*/
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RETSIGTYPE
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childhandler (int sig)
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{
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pid_t pid;
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int status;
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do {
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pid = waitpid (-1, &status, WNOHANG|WUNTRACED);
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} while(pid > 0);
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signal (SIGCHLD, childhandler);
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SIGRETURN(0);
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}
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/*
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* Allocate and listen on a local X server socket, display dnr.
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*/
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int
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get_local_xsocket (unsigned dnr)
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{
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int fd;
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struct sockaddr_un addr;
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fd = socket (AF_UNIX, SOCK_STREAM, 0);
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if (fd < 0) {
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fprintf (stderr, "%s: socket: %s\n", prog, strerror(errno));
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return fd;
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}
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addr.sun_family = AF_UNIX;
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sprintf (addr.sun_path, "/tmp/.X11-unix/X%u", dnr);
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unlink (addr.sun_path);
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if(bind (fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
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fprintf (stderr, "%s: bind: %s\n", prog,
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strerror(errno));
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return -1;
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}
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if (listen (fd, SOMAXCONN) < 0) {
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fprintf (stderr, "%s: listen: %s\n", prog,
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strerror(errno));
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return -1;
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}
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return fd;
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}
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/*
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*
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*/
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int
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connect_local_xsocket (unsigned dnr)
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{
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int fd;
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struct sockaddr_un addr;
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fd = socket (AF_UNIX, SOCK_STREAM, 0);
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if (fd < 0) {
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fprintf (stderr, "%s: socket: %s\n", prog, strerror(errno));
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return fd;
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}
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addr.sun_family = AF_UNIX;
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sprintf (addr.sun_path, "/tmp/.X11-unix/X%u", dnr);
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if (connect (fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
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fprintf (stderr, "%s: connect: %s\n", prog,
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strerror(errno));
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return -1;
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}
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return fd;
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}
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