--- sourceforge.net/trunk/rdesktop/rdesktop.c 2001/09/14 03:38:39 29 +++ sourceforge.net/trunk/rdesktop/rdesktop.c 2003/06/19 11:51:18 427 @@ -1,156 +1,315 @@ -/* +/* -*- c-basic-offset: 8 -*- rdesktop: A Remote Desktop Protocol client. Entrypoint and utility functions - Copyright (C) Matthew Chapman 1999-2000 - + Copyright (C) Matthew Chapman 1999-2003 + This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. - + This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - + You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ -#include /* malloc realloc free */ +#include /* va_list va_start va_end */ #include /* read close getuid getgid getpid getppid gethostname */ #include /* open */ #include /* getpwuid */ +#include /* tcgetattr tcsetattr */ #include /* stat */ #include /* gettimeofday */ #include /* times */ +#include #include "rdesktop.h" +#ifdef EGD_SOCKET +#include /* socket connect */ +#include /* sockaddr_un */ +#endif + +#ifdef WITH_OPENSSL +#include +#else +#include "crypto/md5.h" +#endif + +char title[32] = ""; char username[16]; char hostname[16]; -int width = 800; +char keymapname[16]; +int keylayout = 0x409; /* Defaults to US keyboard layout */ +int width = 800; /* If width or height are reset to zero, the geometry will + be fetched from _NET_WORKAREA */ int height = 600; -int keylayout = 0x409; +int tcp_port_rdp = TCP_PORT_RDP; +int server_bpp = 8; +int win_button_size = 0; /* If zero, disable single app mode */ BOOL bitmap_compression = True; BOOL sendmotion = True; BOOL orders = True; -BOOL licence = True; -BOOL use_encryption = True; +BOOL encryption = True; +BOOL packet_encryption = True; BOOL desktop_save = True; BOOL fullscreen = False; - +BOOL grab_keyboard = True; +BOOL hide_decorations = False; +BOOL use_rdp5 = False; +extern BOOL owncolmap; + +#ifdef RDP2VNC +extern int rfb_port; +extern int defer_time; +void +rdp2vnc_connect(char *server, uint32 flags, char *domain, char *password, + char *shell, char *directory); +#endif /* Display usage information */ static void usage(char *program) { - STATUS("Usage: %s [options] server\n", program); - STATUS(" -u: user name\n"); - STATUS(" -d: domain\n"); - STATUS(" -s: shell\n"); - STATUS(" -c: working directory\n"); - STATUS(" -p: password (autologon)\n"); - STATUS(" -n: client hostname\n"); - STATUS(" -w: desktop width\n"); - STATUS(" -h: desktop height\n"); - STATUS(" -k: keyboard layout (hex)\n"); - STATUS(" -b: force bitmap updates\n"); - STATUS(" -m: do not send motion events\n"); - STATUS(" -l: do not request licence\n\n"); + fprintf(stderr, "rdesktop: A Remote Desktop Protocol client.\n"); + fprintf(stderr, "Version " VERSION ". Copyright (C) 1999-2003 Matt Chapman.\n"); + fprintf(stderr, "See http://www.rdesktop.org/ for more information.\n\n"); + + fprintf(stderr, "Usage: %s [options] server[:port]\n", program); +#ifdef RDP2VNC + fprintf(stderr, " -V: vnc port\n"); + fprintf(stderr, " -E: defer time (ms)\n"); +#endif + fprintf(stderr, " -u: user name\n"); + fprintf(stderr, " -d: domain\n"); + fprintf(stderr, " -s: shell\n"); + fprintf(stderr, " -S: caption button size (single application mode)\n"); + fprintf(stderr, " -c: working directory\n"); + fprintf(stderr, " -p: password (- to prompt)\n"); + fprintf(stderr, " -n: client hostname\n"); + fprintf(stderr, " -k: keyboard layout on terminal server (us,sv,gr,etc.)\n"); + fprintf(stderr, " -g: desktop geometry (WxH)\n"); + fprintf(stderr, " -f: full-screen mode\n"); + fprintf(stderr, " -b: force bitmap updates\n"); + fprintf(stderr, " -e: disable encryption (French TS)\n"); + fprintf(stderr, " -E: disable encryption of everything but the logon packet\n"); + fprintf(stderr, " -m: do not send motion events\n"); + fprintf(stderr, " -C: use private colour map\n"); + fprintf(stderr, " -K: keep window manager key bindings\n"); + fprintf(stderr, " -T: window title\n"); + fprintf(stderr, " -D: hide window manager decorations\n"); + fprintf(stderr, " -a: server bpp\n"); + fprintf(stderr, " -5: Use RDP5 (EXPERIMENTAL!)\n"); +} + +static BOOL +read_password(char *password, int size) +{ + struct termios tios; + BOOL ret = False; + int istty = 0; + char *p; + + if (tcgetattr(STDIN_FILENO, &tios) == 0) + { + fprintf(stderr, "Password: "); + tios.c_lflag &= ~ECHO; + tcsetattr(STDIN_FILENO, TCSANOW, &tios); + istty = 1; + } + + if (fgets(password, size, stdin) != NULL) + { + ret = True; + + /* strip final newline */ + p = strchr(password, '\n'); + if (p != NULL) + *p = 0; + } + + if (istty) + { + tios.c_lflag |= ECHO; + tcsetattr(STDIN_FILENO, TCSANOW, &tios); + fprintf(stderr, "\n"); + } + + return ret; } /* Client program */ int main(int argc, char *argv[]) { - struct passwd *pw; - char *server; - uint32 flags; + char server[64]; + char fullhostname[64]; char domain[16]; char password[16]; - char shell[32]; + char shell[128]; char directory[32]; - char title[32]; + BOOL prompt_password, rdp_retval = False; + struct passwd *pw; + uint32 flags; + char *p; int c; - - STATUS("rdesktop: A Remote Desktop Protocol client.\n"); - STATUS("Version " VERSION - ". Copyright (C) 1999-2000 Matt Chapman.\n"); - STATUS("See http://www.rdesktop.org/ for more information.\n\n"); + int username_option = 0; flags = RDP_LOGON_NORMAL; + prompt_password = False; domain[0] = password[0] = shell[0] = directory[0] = 0; + strcpy(keymapname, "en-us"); - while ((c = getopt(argc, argv, "u:d:s:c:p:n:g:k:mbleKFVh?")) != -1) +#ifdef RDP2VNC +#define VNCOPT "V:E:" +#else +#define VNCOPT +#endif + + while ((c = getopt(argc, argv, VNCOPT "u:d:s:S:c:p:n:k:g:a:fbeEmCKT:Dh?54")) != -1) { switch (c) { +#ifdef RDP2VNC + case 'V': + rfb_port = strtol(optarg, NULL, 10); + if (rfb_port < 100) + rfb_port += 5900; + break; + + case 'E': + defer_time = strtol(optarg, NULL, 10); + if (defer_time < 0) + defer_time = 0; + break; +#endif + case 'u': - strncpy(username, optarg, sizeof(username)); + STRNCPY(username, optarg, sizeof(username)); + username_option = 1; break; case 'd': - strncpy(domain, optarg, sizeof(domain)); + STRNCPY(domain, optarg, sizeof(domain)); break; - case 'p': - flags |= RDP_LOGON_AUTO; - strncpy(password, optarg, sizeof(password)); + case 's': + STRNCPY(shell, optarg, sizeof(shell)); break; - case 's': - strncpy(shell, optarg, sizeof(shell)); + case 'S': + if (!strcmp(optarg, "standard")) + { + win_button_size = 18; + break; + } + + win_button_size = strtol(optarg, &p, 10); + + if (*p) + { + error("invalid button size\n"); + return 1; + } + break; case 'c': - strncpy(directory, optarg, sizeof(directory)); + STRNCPY(directory, optarg, sizeof(directory)); + break; + + case 'p': + if ((optarg[0] == '-') && (optarg[1] == 0)) + { + prompt_password = True; + break; + } + + STRNCPY(password, optarg, sizeof(password)); + flags |= RDP_LOGON_AUTO; + + /* try to overwrite argument so it won't appear in ps */ + p = optarg; + while (*p) + *(p++) = 'X'; break; case 'n': - strncpy(hostname, optarg, sizeof(hostname)); + STRNCPY(hostname, optarg, sizeof(hostname)); + break; + + case 'k': + STRNCPY(keymapname, optarg, sizeof(keymapname)); break; + case 'g': + if (!strcmp(optarg, "workarea")) + { + width = height = 0; + break; + } + + width = strtol(optarg, &p, 10); + if (*p == 'x') + height = strtol(p + 1, NULL, 10); + + if ((width == 0) || (height == 0)) { - char *tgem = 0; - width = strtol(optarg, NULL, 10); - tgem = strchr(optarg, 'x'); - if ((tgem == 0) || (strlen(tgem) < 2)) - { - ERROR - ("-g: invalid parameter. Syntax example: -g 1024x768\n"); - exit(1); - } - height = strtol(tgem + 1, NULL, 10); + error("invalid geometry\n"); + return 1; } break; - case 'k': - keylayout = strtol(optarg, NULL, 16); - /* keylayout = find_keyb_code(optarg); */ - if (keylayout == 0) - return 0; + case 'f': + fullscreen = True; break; + case 'b': + orders = False; + break; + + case 'e': + encryption = False; + break; + case 'E': + packet_encryption = False; + break; case 'm': sendmotion = False; break; - case 'b': - orders = False; + case 'C': + owncolmap = True; break; - case 'l': - licence = False; + case 'K': + grab_keyboard = False; break; - case 'e': - use_encryption = False; + case 'T': + STRNCPY(title, optarg, sizeof(title)); break; - case 'F': - fullscreen = True; + case 'D': + hide_decorations = True; break; + case 'a': + server_bpp = strtol(optarg, NULL, 10); + if (server_bpp != 8 && server_bpp != 16 && server_bpp != 15 + && server_bpp != 24) + { + error("invalid server bpp\n"); + return 1; + } + break; + + case '5': + use_rdp5 = True; + break; case 'h': case '?': default: @@ -165,65 +324,160 @@ return 1; } - server = argv[optind]; + STRNCPY(server, argv[optind], sizeof(server)); + p = strchr(server, ':'); + if (p != NULL) + { + tcp_port_rdp = strtol(p + 1, NULL, 10); + *p = 0; + } - if (username[0] == 0) + if (!username_option) { pw = getpwuid(getuid()); if ((pw == NULL) || (pw->pw_name == NULL)) { - STATUS("Could not determine user name.\n"); + error("could not determine username, use -u\n"); return 1; } - strncpy(username, pw->pw_name, sizeof(username)); + STRNCPY(username, pw->pw_name, sizeof(username)); } if (hostname[0] == 0) { - if (gethostname(hostname, sizeof(hostname)) == -1) + if (gethostname(fullhostname, sizeof(fullhostname)) == -1) { - STATUS("Could not determine host name.\n"); + error("could not determine local hostname, use -n\n"); return 1; } + + p = strchr(fullhostname, '.'); + if (p != NULL) + *p = 0; + + STRNCPY(hostname, fullhostname, sizeof(hostname)); } - strcpy(title, "rdesktop - "); - strncat(title, server, sizeof(title)); + if (prompt_password && read_password(password, sizeof(password))) + flags |= RDP_LOGON_AUTO; - if (ui_create_window(title)) + if (title[0] == 0) { - if (!rdp_connect(server, flags, domain, password, shell, - directory)) - return 1; + strcpy(title, "rdesktop - "); + strncat(title, server, sizeof(title) - sizeof("rdesktop - ")); + } + +#ifdef RDP2VNC + rdp2vnc_connect(server, flags, domain, password, shell, directory); + return 0; +#else + + if (!ui_init()) + return 1; + + ipc_init(); // Must be run after ui_init, we need X to be setup. + + if (use_rdp5) + cliprdr_init(); // FIXME: Should perhaps be integrated into the channel management code? + + if (!rdp_connect(server, flags, domain, password, shell, directory)) + return 1; - STATUS("Connection successful.\n"); - rdp_main_loop(); + /* By setting encryption to False here, we have an encrypted login + packet but unencrypted transfer of other packets */ + if (!packet_encryption) + encryption = False; + + + DEBUG(("Connection successful.\n")); + memset(password, 0, sizeof(password)); + + if (ui_create_window()) + { + rdp_retval = rdp_main_loop(); ui_destroy_window(); } + DEBUG(("Disconnecting...\n")); rdp_disconnect(); - return 0; + ui_deinit(); + + if (True == rdp_retval) + return 0; + else + return 2; + +#endif + +} + +#ifdef EGD_SOCKET +/* Read 32 random bytes from PRNGD or EGD socket (based on OpenSSL RAND_egd) */ +static BOOL +generate_random_egd(uint8 * buf) +{ + struct sockaddr_un addr; + BOOL ret = False; + int fd; + + fd = socket(AF_UNIX, SOCK_STREAM, 0); + if (fd == -1) + return False; + + addr.sun_family = AF_UNIX; + memcpy(addr.sun_path, EGD_SOCKET, sizeof(EGD_SOCKET)); + if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1) + goto err; + + /* PRNGD and EGD use a simple communications protocol */ + buf[0] = 1; /* Non-blocking (similar to /dev/urandom) */ + buf[1] = 32; /* Number of requested random bytes */ + if (write(fd, buf, 2) != 2) + goto err; + + if ((read(fd, buf, 1) != 1) || (buf[0] == 0)) /* Available? */ + goto err; + + if (read(fd, buf, 32) != 32) + goto err; + + ret = True; + + err: + close(fd); + return ret; } +#endif /* Generate a 32-byte random for the secure transport code. */ void -generate_random(uint8 *random) +generate_random(uint8 * random) { struct stat st; struct tms tmsbuf; - uint32 *r = (uint32 *) random; - int fd; - - /* If we have a kernel random device, use it. */ - if ((fd = open("/dev/urandom", O_RDONLY)) != -1) + MD5_CTX md5; + uint32 *r; + int fd, n; + + /* If we have a kernel random device, try that first */ + if (((fd = open("/dev/urandom", O_RDONLY)) != -1) + || ((fd = open("/dev/random", O_RDONLY)) != -1)) { - read(fd, random, 32); + n = read(fd, random, 32); close(fd); - return; + if (n == 32) + return; } +#ifdef EGD_SOCKET + /* As a second preference use an EGD */ + if (generate_random_egd(random)) + return; +#endif + /* Otherwise use whatever entropy we can gather - ideas welcome. */ + r = (uint32 *) random; r[0] = (getpid()) | (getppid() << 16); r[1] = (getuid()) | (getgid() << 16); r[2] = times(&tmsbuf); /* system uptime (clocks) */ @@ -232,6 +486,13 @@ r[5] = st.st_atime; r[6] = st.st_mtime; r[7] = st.st_ctime; + + /* Hash both halves with MD5 to obscure possible patterns */ + MD5_Init(&md5); + MD5_Update(&md5, random, 16); + MD5_Final(random, &md5); + MD5_Update(&md5, random + 16, 16); + MD5_Final(random + 16, &md5); } /* malloc; exit if out of memory */ @@ -241,7 +502,7 @@ void *mem = malloc(size); if (mem == NULL) { - ERROR("xmalloc %d\n", size); + error("xmalloc %d\n", size); exit(1); } return mem; @@ -254,7 +515,7 @@ void *mem = realloc(oldmem, size); if (mem == NULL) { - ERROR("xrealloc %d\n", size); + error("xrealloc %d\n", size); exit(1); } return mem; @@ -267,32 +528,148 @@ free(mem); } -/* Produce a hex dump */ +/* report an error */ +void +error(char *format, ...) +{ + va_list ap; + + fprintf(stderr, "ERROR: "); + + va_start(ap, format); + vfprintf(stderr, format, ap); + va_end(ap); +} + +/* report a warning */ void -hexdump(unsigned char *p, unsigned int len) +warning(char *format, ...) +{ + va_list ap; + + fprintf(stderr, "WARNING: "); + + va_start(ap, format); + vfprintf(stderr, format, ap); + va_end(ap); +} + +/* report an unimplemented protocol feature */ +void +unimpl(char *format, ...) +{ + va_list ap; + + fprintf(stderr, "NOT IMPLEMENTED: "); + + va_start(ap, format); + vfprintf(stderr, format, ap); + va_end(ap); +} + +/* produce a hex dump */ +void +hexdump(unsigned char *p, int len) { unsigned char *line = p; - unsigned int thisline, offset = 0; - int i; + int i, thisline, offset = 0; while (offset < len) { - STATUS("%04x ", offset); + printf("%04x ", offset); thisline = len - offset; if (thisline > 16) thisline = 16; for (i = 0; i < thisline; i++) - STATUS("%02x ", line[i]) for (; i < 16; i++) - STATUS(" "); + printf("%02x ", line[i]); + + for (; i < 16; i++) + printf(" "); for (i = 0; i < thisline; i++) - STATUS("%c", - (line[i] >= 0x20 - && line[i] < 0x7f) ? line[i] : '.'); + printf("%c", (line[i] >= 0x20 && line[i] < 0x7f) ? line[i] : '.'); - STATUS("\n"); + printf("\n"); offset += thisline; line += thisline; } } + + +int +load_licence(unsigned char **data) +{ + char *home, *path; + struct stat st; + int fd, length; + + home = getenv("HOME"); + if (home == NULL) + return -1; + + path = (char *) xmalloc(strlen(home) + strlen(hostname) + sizeof("/.rdesktop/licence.")); + sprintf(path, "%s/.rdesktop/licence.%s", home, hostname); + + fd = open(path, O_RDONLY); + if (fd == -1) + return -1; + + if (fstat(fd, &st)) + return -1; + + *data = (uint8 *) xmalloc(st.st_size); + length = read(fd, *data, st.st_size); + close(fd); + xfree(path); + return length; +} + +void +save_licence(unsigned char *data, int length) +{ + char *home, *path, *tmppath; + int fd; + + home = getenv("HOME"); + if (home == NULL) + return; + + path = (char *) xmalloc(strlen(home) + strlen(hostname) + sizeof("/.rdesktop/licence.")); + + sprintf(path, "%s/.rdesktop", home); + if ((mkdir(path, 0700) == -1) && errno != EEXIST) + { + perror(path); + return; + } + + /* write licence to licence.hostname.new, then atomically rename to licence.hostname */ + + sprintf(path, "%s/.rdesktop/licence.%s", home, hostname); + tmppath = (char *) xmalloc(strlen(path) + sizeof(".new")); + strcpy(tmppath, path); + strcat(tmppath, ".new"); + + fd = open(tmppath, O_WRONLY | O_CREAT | O_TRUNC, 0600); + if (fd == -1) + { + perror(tmppath); + return; + } + + if (write(fd, data, length) != length) + { + perror(tmppath); + unlink(tmppath); + } + else if (rename(tmppath, path) == -1) + { + perror(path); + unlink(tmppath); + } + + close(fd); + xfree(tmppath); + xfree(path); +}