01be712432
couple of error messages (not sure whether scewed was meant to be skewed or screwed :)) git-svn-id: svn://svn.code.sf.net/p/rdesktop/code/trunk/rdesktop@296 423420c4-83ab-492f-b58f-81f9feb106b5
663 lines
13 KiB
C
663 lines
13 KiB
C
/*
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rdesktop: A Remote Desktop Protocol client.
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Entrypoint and utility functions
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Copyright (C) Matthew Chapman 1999-2002
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdarg.h> /* va_list va_start va_end */
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#include <unistd.h> /* read close getuid getgid getpid getppid gethostname */
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#include <fcntl.h> /* open */
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#include <errno.h> /* save licence uses it. */
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#include <pwd.h> /* getpwuid */
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#include <termios.h> /* tcgetattr tcsetattr */
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#include <sys/stat.h> /* stat */
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#include <sys/time.h> /* gettimeofday */
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#include <sys/times.h> /* times */
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#include "rdesktop.h"
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#ifdef EGD_SOCKET
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#include <sys/socket.h> /* socket connect */
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#include <sys/un.h> /* sockaddr_un */
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#endif
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#ifdef WITH_OPENSSL
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#include <openssl/md5.h>
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#else
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#include "crypto/md5.h"
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#endif
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char title[32] = "";
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char username[16];
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char hostname[16];
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char keymapname[16];
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int keylayout = 0x409; /* Defaults to US keyboard layout */
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int width = 800; /* If width or height are reset to zero, the geometry will
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be fetched from _NET_WORKAREA */
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int height = 600;
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int tcp_port_rdp = TCP_PORT_RDP;
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BOOL bitmap_compression = True;
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BOOL sendmotion = True;
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BOOL orders = True;
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BOOL encryption = True;
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BOOL desktop_save = True;
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BOOL fullscreen = False;
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BOOL grab_keyboard = True;
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BOOL hide_decorations = False;
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extern BOOL owncolmap;
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/* Display usage information */
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static void
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usage(char *program)
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{
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fprintf(stderr, "rdesktop: A Remote Desktop Protocol client.\n");
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fprintf(stderr, "Version " VERSION ". Copyright (C) 1999-2002 Matt Chapman.\n");
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fprintf(stderr, "See http://www.rdesktop.org/ for more information.\n\n");
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fprintf(stderr, "Usage: %s [options] server[:port]\n", program);
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fprintf(stderr, " -u: user name\n");
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fprintf(stderr, " -d: domain\n");
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fprintf(stderr, " -s: shell\n");
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fprintf(stderr, " -c: working directory\n");
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fprintf(stderr, " -p: password (- to prompt)\n");
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fprintf(stderr, " -n: client hostname\n");
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fprintf(stderr, " -k: keyboard layout on terminal server (us,sv,gr,etc.)\n");
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fprintf(stderr, " -g: desktop geometry (WxH)\n");
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fprintf(stderr, " -f: full-screen mode\n");
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fprintf(stderr, " -b: force bitmap updates\n");
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fprintf(stderr, " -e: disable encryption (French TS)\n");
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fprintf(stderr, " -m: do not send motion events\n");
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fprintf(stderr, " -C: use private colour map\n");
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fprintf(stderr, " -K: keep window manager key bindings\n");
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fprintf(stderr, " -T: window title\n");
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fprintf(stderr, " -D: hide window manager decorations\n");
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}
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static BOOL
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read_password(char *password, int size)
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{
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struct termios tios;
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BOOL ret = False;
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int istty = 0;
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char *p;
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if (tcgetattr(STDIN_FILENO, &tios) == 0)
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{
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fprintf(stderr, "Password: ");
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tios.c_lflag &= ~ECHO;
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tcsetattr(STDIN_FILENO, TCSANOW, &tios);
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istty = 1;
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}
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if (fgets(password, size, stdin) != NULL)
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{
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ret = True;
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/* strip final newline */
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p = strchr(password, '\n');
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if (p != NULL)
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*p = 0;
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}
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if (istty)
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{
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tios.c_lflag |= ECHO;
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tcsetattr(STDIN_FILENO, TCSANOW, &tios);
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fprintf(stderr, "\n");
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}
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return ret;
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}
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/* Client program */
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int
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main(int argc, char *argv[])
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{
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char server[64];
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char fullhostname[64];
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char domain[16];
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char password[16];
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char shell[128];
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char directory[32];
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BOOL prompt_password;
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struct passwd *pw;
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uint32 flags;
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char *p;
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int c;
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int username_option = 0;
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flags = RDP_LOGON_NORMAL;
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prompt_password = False;
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domain[0] = password[0] = shell[0] = directory[0] = 0;
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strcpy(keymapname, "en-us");
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while ((c = getopt(argc, argv, "u:d:s:c:p:n:k:g:fbemCKT:Dh?")) != -1)
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{
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switch (c)
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{
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case 'u':
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STRNCPY(username, optarg, sizeof(username));
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username_option = 1;
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break;
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case 'd':
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STRNCPY(domain, optarg, sizeof(domain));
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break;
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case 's':
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STRNCPY(shell, optarg, sizeof(shell));
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break;
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case 'c':
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STRNCPY(directory, optarg, sizeof(directory));
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break;
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case 'p':
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if ((optarg[0] == '-') && (optarg[1] == 0))
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{
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prompt_password = True;
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break;
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}
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STRNCPY(password, optarg, sizeof(password));
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flags |= RDP_LOGON_AUTO;
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/* try to overwrite argument so it won't appear in ps */
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p = optarg;
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while (*p)
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*(p++) = 'X';
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break;
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case 'n':
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STRNCPY(hostname, optarg, sizeof(hostname));
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break;
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case 'k':
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STRNCPY(keymapname, optarg, sizeof(keymapname));
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break;
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case 'g':
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if (!strcmp(optarg, "workarea"))
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{
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width = height = 0;
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break;
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}
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width = strtol(optarg, &p, 10);
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if (*p == 'x')
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height = strtol(p + 1, NULL, 10);
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if ((width == 0) || (height == 0))
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{
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error("invalid geometry\n");
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return 1;
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}
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break;
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case 'f':
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fullscreen = True;
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break;
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case 'b':
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orders = False;
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break;
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case 'e':
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encryption = False;
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break;
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case 'm':
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sendmotion = False;
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break;
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case 'C':
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owncolmap = True;
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break;
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case 'K':
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grab_keyboard = False;
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break;
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case 'T':
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STRNCPY(title, optarg, sizeof(title));
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break;
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case 'D':
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hide_decorations = True;
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break;
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case 'h':
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case '?':
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default:
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usage(argv[0]);
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return 1;
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}
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}
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if (argc - optind < 1)
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{
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usage(argv[0]);
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return 1;
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}
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STRNCPY(server, argv[optind], sizeof(server));
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p = strchr(server, ':');
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if (p != NULL)
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{
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tcp_port_rdp = strtol(p + 1, NULL, 10);
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*p = 0;
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}
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if (!username_option)
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{
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pw = getpwuid(getuid());
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if ((pw == NULL) || (pw->pw_name == NULL))
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{
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error("could not determine username, use -u\n");
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return 1;
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}
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STRNCPY(username, pw->pw_name, sizeof(username));
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}
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if (hostname[0] == 0)
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{
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if (gethostname(fullhostname, sizeof(fullhostname)) == -1)
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{
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error("could not determine local hostname, use -n\n");
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return 1;
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}
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p = strchr(fullhostname, '.');
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if (p != NULL)
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*p = 0;
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STRNCPY(hostname, fullhostname, sizeof(hostname));
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}
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if (prompt_password && read_password(password, sizeof(password)))
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flags |= RDP_LOGON_AUTO;
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if (title[0] == 0)
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{
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strcpy(title, "rdesktop - ");
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strncat(title, server, sizeof(title) - sizeof("rdesktop - "));
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}
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if (!ui_init())
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return 1;
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if (!rdp_connect(server, flags, domain, password, shell, directory))
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return 1;
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DEBUG(("Connection successful.\n"));
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memset(password, 0, sizeof(password));
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if (ui_create_window())
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{
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rdp_main_loop();
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ui_destroy_window();
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}
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DEBUG(("Disconnecting...\n"));
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rdp_disconnect();
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ui_deinit();
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return 0;
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}
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#ifdef EGD_SOCKET
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/* Read 32 random bytes from PRNGD or EGD socket (based on OpenSSL RAND_egd) */
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static BOOL
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generate_random_egd(uint8 * buf)
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{
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struct sockaddr_un addr;
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BOOL ret = False;
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int fd;
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fd = socket(AF_UNIX, SOCK_STREAM, 0);
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if (fd == -1)
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return False;
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addr.sun_family = AF_UNIX;
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memcpy(addr.sun_path, EGD_SOCKET, sizeof(EGD_SOCKET));
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if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1)
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goto err;
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/* PRNGD and EGD use a simple communications protocol */
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buf[0] = 1; /* Non-blocking (similar to /dev/urandom) */
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buf[1] = 32; /* Number of requested random bytes */
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if (write(fd, buf, 2) != 2)
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goto err;
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if ((read(fd, buf, 1) != 1) || (buf[0] == 0)) /* Available? */
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goto err;
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if (read(fd, buf, 32) != 32)
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goto err;
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ret = True;
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err:
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close(fd);
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return ret;
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}
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#endif
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/* Generate a 32-byte random for the secure transport code. */
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void
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generate_random(uint8 * random)
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{
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struct stat st;
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struct tms tmsbuf;
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MD5_CTX md5;
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uint32 *r;
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int fd, n;
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/* If we have a kernel random device, try that first */
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if (((fd = open("/dev/urandom", O_RDONLY)) != -1)
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|| ((fd = open("/dev/random", O_RDONLY)) != -1))
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{
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n = read(fd, random, 32);
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close(fd);
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if (n == 32)
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return;
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}
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#ifdef EGD_SOCKET
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/* As a second preference use an EGD */
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if (generate_random_egd(random))
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return;
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#endif
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/* Otherwise use whatever entropy we can gather - ideas welcome. */
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r = (uint32 *) random;
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r[0] = (getpid()) | (getppid() << 16);
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r[1] = (getuid()) | (getgid() << 16);
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r[2] = times(&tmsbuf); /* system uptime (clocks) */
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gettimeofday((struct timeval *) &r[3], NULL); /* sec and usec */
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stat("/tmp", &st);
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r[5] = st.st_atime;
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r[6] = st.st_mtime;
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r[7] = st.st_ctime;
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/* Hash both halves with MD5 to obscure possible patterns */
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MD5_Init(&md5);
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MD5_Update(&md5, random, 16);
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MD5_Final(random, &md5);
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MD5_Update(&md5, random + 16, 16);
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MD5_Final(random + 16, &md5);
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}
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/* malloc; exit if out of memory */
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void *
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xmalloc(int size)
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{
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void *mem = malloc(size);
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if (mem == NULL)
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{
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error("xmalloc %d\n", size);
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exit(1);
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}
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return mem;
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}
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/* realloc; exit if out of memory */
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void *
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xrealloc(void *oldmem, int size)
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{
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void *mem = realloc(oldmem, size);
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if (mem == NULL)
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{
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error("xrealloc %d\n", size);
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exit(1);
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}
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return mem;
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}
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/* free */
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void
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xfree(void *mem)
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{
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free(mem);
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}
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/* report an error */
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void
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error(char *format, ...)
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{
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va_list ap;
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fprintf(stderr, "ERROR: ");
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va_start(ap, format);
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vfprintf(stderr, format, ap);
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va_end(ap);
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}
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/* report a warning */
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void
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warning(char *format, ...)
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{
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va_list ap;
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fprintf(stderr, "WARNING: ");
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va_start(ap, format);
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vfprintf(stderr, format, ap);
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va_end(ap);
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}
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/* report an unimplemented protocol feature */
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void
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unimpl(char *format, ...)
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{
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va_list ap;
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fprintf(stderr, "NOT IMPLEMENTED: ");
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va_start(ap, format);
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vfprintf(stderr, format, ap);
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va_end(ap);
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}
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/* produce a hex dump */
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void
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hexdump(unsigned char *p, unsigned int len)
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{
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unsigned char *line = p;
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unsigned int thisline, offset = 0;
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int i;
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while (offset < len)
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{
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printf("%04x ", offset);
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thisline = len - offset;
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if (thisline > 16)
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thisline = 16;
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for (i = 0; i < thisline; i++)
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printf("%02x ", line[i]);
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for (; i < 16; i++)
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printf(" ");
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for (i = 0; i < thisline; i++)
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printf("%c", (line[i] >= 0x20 && line[i] < 0x7f) ? line[i] : '.');
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printf("\n");
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offset += thisline;
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line += thisline;
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}
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}
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#ifdef SAVE_LICENCE
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int
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load_licence(unsigned char **data)
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{
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char *path;
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char *home;
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struct stat st;
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int fd;
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home = getenv("HOME");
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if (home == NULL)
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return -1;
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path = xmalloc(strlen(home) + strlen(hostname) + 20);
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sprintf(path, "%s/.rdesktop/licence.%s", home, hostname);
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fd = open(path, O_RDONLY);
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if (fd == -1)
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return -1;
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if (fstat(fd, &st))
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return -1;
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*data = xmalloc(st.st_size);
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return read(fd, *data, st.st_size);
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}
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void
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save_licence(unsigned char *data, int length)
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{
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char *fpath; /* file path for licence */
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char *fname, *fnamewrk; /* file name for licence .inkl path. */
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char *home;
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uint32 y;
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struct flock fnfl;
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int fnfd, fnwrkfd, i, wlen;
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struct stream s, *s_ptr;
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uint32 len;
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/* Construct a stream, so that we can use macros to extract the
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* licence.
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*/
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s_ptr = &s;
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s_ptr->p = data;
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/* Skip first two bytes */
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in_uint16(s_ptr, len);
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/* Skip three strings */
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for (i = 0; i < 3; i++)
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{
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in_uint32(s_ptr, len);
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s_ptr->p += len;
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/* Make sure that we won't be past the end of data after
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* reading the next length value
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*/
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if ((s_ptr->p) + 4 > data + length)
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{
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printf("Error in parsing licence key.\n");
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printf("Strings %d end value %x > supplied length (%x)\n",
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i, s_ptr->p, data + length);
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return;
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}
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}
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in_uint32(s_ptr, len);
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if (s_ptr->p + len > data + length)
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{
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printf("Error in parsing licence key.\n");
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printf("End of licence %x > supplied length (%x)\n", s_ptr->p + len, data + length);
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|
return;
|
|
}
|
|
|
|
home = getenv("HOME");
|
|
if (home == NULL)
|
|
return;
|
|
|
|
/* set and create the directory -- if it doesn't exist. */
|
|
fpath = xmalloc(strlen(home) + 11);
|
|
STRNCPY(fpath, home, strlen(home) + 1);
|
|
|
|
sprintf(fpath, "%s/.rdesktop", fpath);
|
|
if (mkdir(fpath, 0700) == -1 && errno != EEXIST)
|
|
{
|
|
perror("mkdir");
|
|
exit(1);
|
|
}
|
|
|
|
/* set the real licence filename, and put a write lock on it. */
|
|
fname = xmalloc(strlen(fpath) + strlen(hostname) + 10);
|
|
sprintf(fname, "%s/licence.%s", fpath, hostname);
|
|
fnfd = open(fname, O_RDONLY);
|
|
if (fnfd != -1)
|
|
{
|
|
fnfl.l_type = F_WRLCK;
|
|
fnfl.l_whence = SEEK_SET;
|
|
fnfl.l_start = 0;
|
|
fnfl.l_len = 1;
|
|
fcntl(fnfd, F_SETLK, &fnfl);
|
|
}
|
|
|
|
/* create a temporary licence file */
|
|
fnamewrk = xmalloc(strlen(fname) + 12);
|
|
for (y = 0;; y++)
|
|
{
|
|
sprintf(fnamewrk, "%s.%lu", fname, y);
|
|
fnwrkfd = open(fnamewrk, O_WRONLY | O_CREAT | O_EXCL, 0600);
|
|
if (fnwrkfd == -1)
|
|
{
|
|
if (errno == EINTR || errno == EEXIST)
|
|
continue;
|
|
perror("create");
|
|
exit(1);
|
|
}
|
|
break;
|
|
}
|
|
/* write to the licence file */
|
|
for (y = 0; y < len;)
|
|
{
|
|
do
|
|
{
|
|
wlen = write(fnwrkfd, s_ptr->p + y, len - y);
|
|
}
|
|
while (wlen == -1 && errno == EINTR);
|
|
if (wlen < 1)
|
|
{
|
|
perror("write");
|
|
unlink(fnamewrk);
|
|
exit(1);
|
|
}
|
|
y += wlen;
|
|
}
|
|
|
|
/* close the file and rename it to fname */
|
|
if (close(fnwrkfd) == -1)
|
|
{
|
|
perror("close");
|
|
unlink(fnamewrk);
|
|
exit(1);
|
|
}
|
|
if (rename(fnamewrk, fname) == -1)
|
|
{
|
|
perror("rename");
|
|
unlink(fnamewrk);
|
|
exit(1);
|
|
}
|
|
/* close the file lock on fname */
|
|
if (fnfd != -1)
|
|
{
|
|
fnfl.l_type = F_UNLCK;
|
|
fnfl.l_whence = SEEK_SET;
|
|
fnfl.l_start = 0;
|
|
fnfl.l_len = 1;
|
|
fcntl(fnfd, F_SETLK, &fnfl);
|
|
close(fnfd);
|
|
}
|
|
|
|
}
|
|
#endif
|