1 |
/* |
2 |
rdesktop: A Remote Desktop Protocol client. |
3 |
Entrypoint and utility functions |
4 |
Copyright (C) Matthew Chapman 1999-2002 |
5 |
|
6 |
This program is free software; you can redistribute it and/or modify |
7 |
it under the terms of the GNU General Public License as published by |
8 |
the Free Software Foundation; either version 2 of the License, or |
9 |
(at your option) any later version. |
10 |
|
11 |
This program is distributed in the hope that it will be useful, |
12 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 |
GNU General Public License for more details. |
15 |
|
16 |
You should have received a copy of the GNU General Public License |
17 |
along with this program; if not, write to the Free Software |
18 |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
19 |
*/ |
20 |
|
21 |
#include <stdarg.h> /* va_list va_start va_end */ |
22 |
#include <unistd.h> /* read close getuid getgid getpid getppid gethostname */ |
23 |
#include <fcntl.h> /* open */ |
24 |
#include <pwd.h> /* getpwuid */ |
25 |
#include <limits.h> /* PATH_MAX */ |
26 |
#include <termios.h> /* tcgetattr tcsetattr */ |
27 |
#include <sys/stat.h> /* stat */ |
28 |
#include <sys/time.h> /* gettimeofday */ |
29 |
#include <sys/times.h> /* times */ |
30 |
#include "rdesktop.h" |
31 |
|
32 |
#ifdef EGD_SOCKET |
33 |
#include <sys/socket.h> /* socket connect */ |
34 |
#include <sys/un.h> /* sockaddr_un */ |
35 |
#endif |
36 |
|
37 |
#ifdef WITH_OPENSSL |
38 |
#include <openssl/md5.h> |
39 |
#else |
40 |
#include "crypto/md5.h" |
41 |
#endif |
42 |
|
43 |
char title[32] = ""; |
44 |
char username[16]; |
45 |
char hostname[16]; |
46 |
char keymapname[16]; |
47 |
int keylayout = 0x409; /* Defaults to US keyboard layout */ |
48 |
int width = 800; |
49 |
int height = 600; |
50 |
int tcp_port_rdp = TCP_PORT_RDP; |
51 |
BOOL bitmap_compression = True; |
52 |
BOOL sendmotion = True; |
53 |
BOOL orders = True; |
54 |
BOOL encryption = True; |
55 |
BOOL desktop_save = True; |
56 |
BOOL fullscreen = False; |
57 |
BOOL grab_keyboard = True; |
58 |
|
59 |
/* Display usage information */ |
60 |
static void |
61 |
usage(char *program) |
62 |
{ |
63 |
fprintf(stderr, "rdesktop: A Remote Desktop Protocol client.\n"); |
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fprintf(stderr, "Version " VERSION ". Copyright (C) 1999-2002 Matt Chapman.\n"); |
65 |
fprintf(stderr, "See http://www.rdesktop.org/ for more information.\n\n"); |
66 |
|
67 |
fprintf(stderr, "Usage: %s [options] server[:port]\n", program); |
68 |
fprintf(stderr, " -u: user name\n"); |
69 |
fprintf(stderr, " -d: domain\n"); |
70 |
fprintf(stderr, " -s: shell\n"); |
71 |
fprintf(stderr, " -c: working directory\n"); |
72 |
fprintf(stderr, " -p: password (- to prompt)\n"); |
73 |
fprintf(stderr, " -n: client hostname\n"); |
74 |
fprintf(stderr, " -k: keyboard layout on terminal server (us,sv,gr etc.)\n"); |
75 |
fprintf(stderr, " -g: desktop geometry (WxH)\n"); |
76 |
fprintf(stderr, " -f: full-screen mode\n"); |
77 |
fprintf(stderr, " -b: force bitmap updates\n"); |
78 |
fprintf(stderr, " -e: disable encryption (French TS)\n"); |
79 |
fprintf(stderr, " -m: do not send motion events\n"); |
80 |
fprintf(stderr, " -K: keep window manager key bindings\n"); |
81 |
fprintf(stderr, " -w: window title\n"); |
82 |
} |
83 |
|
84 |
static BOOL |
85 |
read_password(char *password, int size) |
86 |
{ |
87 |
struct termios tios; |
88 |
BOOL ret = False; |
89 |
int istty = 0; |
90 |
char *p; |
91 |
|
92 |
if (tcgetattr(STDIN_FILENO, &tios) == 0) |
93 |
{ |
94 |
fprintf(stderr, "Password: "); |
95 |
tios.c_lflag &= ~ECHO; |
96 |
tcsetattr(STDIN_FILENO, TCSANOW, &tios); |
97 |
istty = 1; |
98 |
} |
99 |
|
100 |
if (fgets(password, size, stdin) != NULL) |
101 |
{ |
102 |
ret = True; |
103 |
|
104 |
/* strip final newline */ |
105 |
p = strchr(password, '\n'); |
106 |
if (p != NULL) |
107 |
*p = 0; |
108 |
} |
109 |
|
110 |
if (istty) |
111 |
{ |
112 |
tios.c_lflag |= ECHO; |
113 |
tcsetattr(STDIN_FILENO, TCSANOW, &tios); |
114 |
fprintf(stderr, "\n"); |
115 |
} |
116 |
|
117 |
return ret; |
118 |
} |
119 |
|
120 |
/* Client program */ |
121 |
int |
122 |
main(int argc, char *argv[]) |
123 |
{ |
124 |
char server[64]; |
125 |
char fullhostname[64]; |
126 |
char domain[16]; |
127 |
char password[16]; |
128 |
char shell[32]; |
129 |
char directory[32]; |
130 |
BOOL prompt_password; |
131 |
struct passwd *pw; |
132 |
uint32 flags; |
133 |
char *p; |
134 |
int c; |
135 |
|
136 |
flags = RDP_LOGON_NORMAL; |
137 |
prompt_password = False; |
138 |
domain[0] = password[0] = shell[0] = directory[0] = 0; |
139 |
strcpy(keymapname, "us"); |
140 |
|
141 |
while ((c = getopt(argc, argv, "u:d:s:c:p:n:k:g:fbemKw:h?")) != -1) |
142 |
{ |
143 |
switch (c) |
144 |
{ |
145 |
case 'u': |
146 |
STRNCPY(username, optarg, sizeof(username)); |
147 |
break; |
148 |
|
149 |
case 'd': |
150 |
STRNCPY(domain, optarg, sizeof(domain)); |
151 |
break; |
152 |
|
153 |
case 's': |
154 |
STRNCPY(shell, optarg, sizeof(shell)); |
155 |
break; |
156 |
|
157 |
case 'c': |
158 |
STRNCPY(directory, optarg, sizeof(directory)); |
159 |
break; |
160 |
|
161 |
case 'p': |
162 |
if ((optarg[0] == '-') && (optarg[1] == 0)) |
163 |
{ |
164 |
prompt_password = True; |
165 |
break; |
166 |
} |
167 |
|
168 |
STRNCPY(password, optarg, sizeof(password)); |
169 |
flags |= RDP_LOGON_AUTO; |
170 |
|
171 |
/* try to overwrite argument so it won't appear in ps */ |
172 |
p = optarg; |
173 |
while (*p) |
174 |
*(p++) = 'X'; |
175 |
break; |
176 |
|
177 |
case 'n': |
178 |
STRNCPY(hostname, optarg, sizeof(hostname)); |
179 |
break; |
180 |
|
181 |
case 'k': |
182 |
STRNCPY(keymapname, optarg, sizeof(keymapname)); |
183 |
break; |
184 |
|
185 |
case 'g': |
186 |
width = strtol(optarg, &p, 10); |
187 |
if (*p == 'x') |
188 |
height = strtol(p + 1, NULL, 10); |
189 |
|
190 |
if ((width == 0) || (height == 0)) |
191 |
{ |
192 |
error("invalid geometry\n"); |
193 |
return 1; |
194 |
} |
195 |
break; |
196 |
|
197 |
case 'f': |
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fullscreen = True; |
199 |
break; |
200 |
|
201 |
case 'b': |
202 |
orders = False; |
203 |
break; |
204 |
|
205 |
case 'e': |
206 |
encryption = False; |
207 |
break; |
208 |
|
209 |
case 'm': |
210 |
sendmotion = False; |
211 |
break; |
212 |
|
213 |
case 'K': |
214 |
grab_keyboard = False; |
215 |
break; |
216 |
|
217 |
case 'w': |
218 |
STRNCPY(title, optarg, sizeof(title)); |
219 |
break; |
220 |
|
221 |
case 'h': |
222 |
case '?': |
223 |
default: |
224 |
usage(argv[0]); |
225 |
return 1; |
226 |
} |
227 |
} |
228 |
|
229 |
if (argc - optind < 1) |
230 |
{ |
231 |
usage(argv[0]); |
232 |
return 1; |
233 |
} |
234 |
|
235 |
STRNCPY(server, argv[optind], sizeof(server)); |
236 |
p = strchr(server, ':'); |
237 |
if (p != NULL) |
238 |
{ |
239 |
tcp_port_rdp = strtol(p + 1, NULL, 10); |
240 |
*p = 0; |
241 |
} |
242 |
|
243 |
if (username[0] == 0) |
244 |
{ |
245 |
pw = getpwuid(getuid()); |
246 |
if ((pw == NULL) || (pw->pw_name == NULL)) |
247 |
{ |
248 |
error("could not determine username, use -u\n"); |
249 |
return 1; |
250 |
} |
251 |
|
252 |
STRNCPY(username, pw->pw_name, sizeof(username)); |
253 |
} |
254 |
|
255 |
if (hostname[0] == 0) |
256 |
{ |
257 |
if (gethostname(fullhostname, sizeof(fullhostname)) == -1) |
258 |
{ |
259 |
error("could not determine local hostname, use -n\n"); |
260 |
return 1; |
261 |
} |
262 |
|
263 |
p = strchr(fullhostname, '.'); |
264 |
if (p != NULL) |
265 |
*p = 0; |
266 |
|
267 |
STRNCPY(hostname, fullhostname, sizeof(hostname)); |
268 |
} |
269 |
|
270 |
if (prompt_password && read_password(password, sizeof(password))) |
271 |
flags |= RDP_LOGON_AUTO; |
272 |
|
273 |
if (title[0] == 0) |
274 |
{ |
275 |
strcpy(title, "rdesktop - "); |
276 |
strncat(title, server, sizeof(title) - sizeof("rdesktop - ")); |
277 |
} |
278 |
|
279 |
if (!ui_init()) |
280 |
return 1; |
281 |
|
282 |
if (!rdp_connect(server, flags, domain, password, shell, directory)) |
283 |
return 1; |
284 |
|
285 |
DEBUG(("Connection successful.\n")); |
286 |
memset(password, 0, sizeof(password)); |
287 |
|
288 |
if (ui_create_window()) |
289 |
{ |
290 |
rdp_main_loop(); |
291 |
ui_destroy_window(); |
292 |
} |
293 |
|
294 |
DEBUG(("Disconnecting...\n")); |
295 |
rdp_disconnect(); |
296 |
ui_deinit(); |
297 |
return 0; |
298 |
} |
299 |
|
300 |
#ifdef EGD_SOCKET |
301 |
/* Read 32 random bytes from PRNGD or EGD socket (based on OpenSSL RAND_egd) */ |
302 |
static BOOL |
303 |
generate_random_egd(uint8 * buf) |
304 |
{ |
305 |
struct sockaddr_un addr; |
306 |
BOOL ret = False; |
307 |
int fd; |
308 |
|
309 |
fd = socket(AF_UNIX, SOCK_STREAM, 0); |
310 |
if (fd == -1) |
311 |
return False; |
312 |
|
313 |
addr.sun_family = AF_UNIX; |
314 |
memcpy(addr.sun_path, EGD_SOCKET, sizeof(EGD_SOCKET)); |
315 |
if (connect(fd, (struct sockaddr *)&addr, sizeof(addr)) == -1) |
316 |
goto err; |
317 |
|
318 |
/* PRNGD and EGD use a simple communications protocol */ |
319 |
buf[0] = 1; /* Non-blocking (similar to /dev/urandom) */ |
320 |
buf[1] = 32; /* Number of requested random bytes */ |
321 |
if (write(fd, buf, 2) != 2) |
322 |
goto err; |
323 |
|
324 |
if ((read(fd, buf, 1) != 1) || (buf[0] == 0)) /* Available? */ |
325 |
goto err; |
326 |
|
327 |
if (read(fd, buf, 32) != 32) |
328 |
goto err; |
329 |
|
330 |
ret = True; |
331 |
|
332 |
err: |
333 |
close(fd); |
334 |
return ret; |
335 |
} |
336 |
#endif |
337 |
|
338 |
/* Generate a 32-byte random for the secure transport code. */ |
339 |
void |
340 |
generate_random(uint8 * random) |
341 |
{ |
342 |
struct stat st; |
343 |
struct tms tmsbuf; |
344 |
MD5_CTX md5; |
345 |
uint32 *r; |
346 |
int fd, n; |
347 |
|
348 |
/* If we have a kernel random device, try that first */ |
349 |
if (((fd = open("/dev/urandom", O_RDONLY)) != -1) |
350 |
|| ((fd = open("/dev/random", O_RDONLY)) != -1)) |
351 |
{ |
352 |
n = read(fd, random, 32); |
353 |
close(fd); |
354 |
if (n == 32) |
355 |
return; |
356 |
} |
357 |
|
358 |
#ifdef EGD_SOCKET |
359 |
/* As a second preference use an EGD */ |
360 |
if (generate_random_egd(random)) |
361 |
return; |
362 |
#endif |
363 |
|
364 |
/* Otherwise use whatever entropy we can gather - ideas welcome. */ |
365 |
r = (uint32 *)random; |
366 |
r[0] = (getpid()) | (getppid() << 16); |
367 |
r[1] = (getuid()) | (getgid() << 16); |
368 |
r[2] = times(&tmsbuf); /* system uptime (clocks) */ |
369 |
gettimeofday((struct timeval *) &r[3], NULL); /* sec and usec */ |
370 |
stat("/tmp", &st); |
371 |
r[5] = st.st_atime; |
372 |
r[6] = st.st_mtime; |
373 |
r[7] = st.st_ctime; |
374 |
|
375 |
/* Hash both halves with MD5 to obscure possible patterns */ |
376 |
MD5_Init(&md5); |
377 |
MD5_Update(&md5, random, 16); |
378 |
MD5_Final(random, &md5); |
379 |
MD5_Update(&md5, random+16, 16); |
380 |
MD5_Final(random+16, &md5); |
381 |
} |
382 |
|
383 |
/* malloc; exit if out of memory */ |
384 |
void * |
385 |
xmalloc(int size) |
386 |
{ |
387 |
void *mem = malloc(size); |
388 |
if (mem == NULL) |
389 |
{ |
390 |
error("xmalloc %d\n", size); |
391 |
exit(1); |
392 |
} |
393 |
return mem; |
394 |
} |
395 |
|
396 |
/* realloc; exit if out of memory */ |
397 |
void * |
398 |
xrealloc(void *oldmem, int size) |
399 |
{ |
400 |
void *mem = realloc(oldmem, size); |
401 |
if (mem == NULL) |
402 |
{ |
403 |
error("xrealloc %d\n", size); |
404 |
exit(1); |
405 |
} |
406 |
return mem; |
407 |
} |
408 |
|
409 |
/* free */ |
410 |
void |
411 |
xfree(void *mem) |
412 |
{ |
413 |
free(mem); |
414 |
} |
415 |
|
416 |
/* report an error */ |
417 |
void |
418 |
error(char *format, ...) |
419 |
{ |
420 |
va_list ap; |
421 |
|
422 |
fprintf(stderr, "ERROR: "); |
423 |
|
424 |
va_start(ap, format); |
425 |
vfprintf(stderr, format, ap); |
426 |
va_end(ap); |
427 |
} |
428 |
|
429 |
/* report an unimplemented protocol feature */ |
430 |
void |
431 |
unimpl(char *format, ...) |
432 |
{ |
433 |
va_list ap; |
434 |
|
435 |
fprintf(stderr, "NOT IMPLEMENTED: "); |
436 |
|
437 |
va_start(ap, format); |
438 |
vfprintf(stderr, format, ap); |
439 |
va_end(ap); |
440 |
} |
441 |
|
442 |
/* produce a hex dump */ |
443 |
void |
444 |
hexdump(unsigned char *p, unsigned int len) |
445 |
{ |
446 |
unsigned char *line = p; |
447 |
unsigned int thisline, offset = 0; |
448 |
int i; |
449 |
|
450 |
while (offset < len) |
451 |
{ |
452 |
printf("%04x ", offset); |
453 |
thisline = len - offset; |
454 |
if (thisline > 16) |
455 |
thisline = 16; |
456 |
|
457 |
for (i = 0; i < thisline; i++) |
458 |
printf("%02x ", line[i]); |
459 |
|
460 |
for (; i < 16; i++) |
461 |
printf(" "); |
462 |
|
463 |
for (i = 0; i < thisline; i++) |
464 |
printf("%c", (line[i] >= 0x20 && line[i] < 0x7f) ? line[i] : '.'); |
465 |
|
466 |
printf("\n"); |
467 |
offset += thisline; |
468 |
line += thisline; |
469 |
} |
470 |
} |
471 |
|
472 |
#ifdef SAVE_LICENCE |
473 |
int |
474 |
load_licence(unsigned char **data) |
475 |
{ |
476 |
char path[PATH_MAX]; |
477 |
char *home; |
478 |
struct stat st; |
479 |
int fd; |
480 |
|
481 |
home = getenv("HOME"); |
482 |
if (home == NULL) |
483 |
return -1; |
484 |
|
485 |
STRNCPY(path, home, sizeof(path)); |
486 |
strncat(path, "/.rdesktop/licence", sizeof(path) - strlen(path) - 1); |
487 |
|
488 |
fd = open(path, O_RDONLY); |
489 |
if (fd == -1) |
490 |
return -1; |
491 |
|
492 |
if (fstat(fd, &st)) |
493 |
return -1; |
494 |
|
495 |
*data = xmalloc(st.st_size); |
496 |
return read(fd, *data, st.st_size); |
497 |
} |
498 |
|
499 |
void |
500 |
save_licence(unsigned char *data, int length) |
501 |
{ |
502 |
char path[PATH_MAX]; |
503 |
char *home; |
504 |
int fd; |
505 |
|
506 |
home = getenv("HOME"); |
507 |
if (home == NULL) |
508 |
return; |
509 |
|
510 |
STRNCPY(path, home, sizeof(path)); |
511 |
strncat(path, "/.rdesktop", sizeof(path) - strlen(path) - 1); |
512 |
mkdir(path, 0700); |
513 |
|
514 |
strncat(path, "/licence", sizeof(path) - strlen(path) - 1); |
515 |
|
516 |
fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0600); |
517 |
if (fd == -1) |
518 |
{ |
519 |
perror("open"); |
520 |
return; |
521 |
} |
522 |
|
523 |
write(fd, data, length); |
524 |
close(fd); |
525 |
} |
526 |
#endif |