trunk/rdesktop/rdesktop.c

/*
   rdesktop: A Remote Desktop Protocol client.
   Entrypoint and utility functions
   Copyright (C) Matthew Chapman 1999-2002

   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 <stdarg.h>             /* va_list va_start va_end */
#include <unistd.h>             /* read close getuid getgid getpid getppid gethostname */
#include <fcntl.h>              /* open */
#include <pwd.h>                /* getpwuid */
#include <limits.h>             /* PATH_MAX */
#include <termios.h>            /* tcgetattr tcsetattr */
#include <sys/stat.h>           /* stat */
#include <sys/time.h>           /* gettimeofday */
#include <sys/times.h>          /* times */
#include "rdesktop.h"

#ifdef EGD_SOCKET
#include <sys/socket.h>         /* socket connect */
#include <sys/un.h>             /* sockaddr_un */
#endif

#ifdef WITH_OPENSSL
#include <openssl/md5.h>
#else
#include "crypto/md5.h"
#endif

char title[32] = "";
char username[16];
char hostname[16];
char keymapname[16];
int keylayout = 0x409;          /* Defaults to US keyboard layout */
int width = 800;
int height = 600;
int tcp_port_rdp = TCP_PORT_RDP;
BOOL bitmap_compression = True;
BOOL sendmotion = True;
BOOL orders = True;
BOOL encryption = True;
BOOL desktop_save = True;
BOOL fullscreen = False;
BOOL grab_keyboard = True;

/* Display usage information */
static void
usage(char *program)
{
        fprintf(stderr, "rdesktop: A Remote Desktop Protocol client.\n");
        fprintf(stderr, "Version " VERSION ". Copyright (C) 1999-2002 Matt Chapman.\n");
        fprintf(stderr, "See http://www.rdesktop.org/ for more information.\n\n");

        fprintf(stderr, "Usage: %s [options] server\n", program);
        fprintf(stderr, "   -u: user name\n");
        fprintf(stderr, "   -d: domain\n");
        fprintf(stderr, "   -s: shell\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, "   -m: do not send motion events\n");
        fprintf(stderr, "   -t: rdp tcp port\n");
        fprintf(stderr, "   -K: keep window manager key bindings\n");
        fprintf(stderr, "   -w: window title\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[])
{
        char fullhostname[64];
        char domain[16];
        char password[16];
        char shell[32];
        char directory[32];
        BOOL prompt_password;
        struct passwd *pw;
        char *server, *p;
        uint32 flags;
        int c;

        flags = RDP_LOGON_NORMAL;
        prompt_password = False;
        domain[0] = password[0] = shell[0] = directory[0] = 0;
        strcpy(keymapname, "us");

        while ((c = getopt(argc, argv, "u:d:s:c:p:n:k:g:t:fbemKw:h?")) != -1)
        {
                switch (c)
                {
                        case 'u':
                                STRNCPY(username, optarg, sizeof(username));
                                break;

                        case 'd':
                                STRNCPY(domain, optarg, sizeof(domain));
                                break;

                        case 's':
                                STRNCPY(shell, optarg, sizeof(shell));
                                break;

                        case 'c':
                                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));
                                break;

                        case 'k':
                                STRNCPY(keymapname, optarg, sizeof(keymapname));
                                break;

                        case 'g':
                                width = strtol(optarg, &p, 10);
                                if (*p == 'x')
                                        height = strtol(p + 1, NULL, 10);

                                if ((width == 0) || (height == 0))
                                {
                                        error("invalid geometry\n");
                                        return 1;
                                }
                                break;

                        case 'f':
                                fullscreen = True;
                                break;

                        case 'b':
                                orders = False;
                                break;

                        case 'e':
                                encryption = False;
                                break;

                        case 'm':
                                sendmotion = False;
                                break;

                        case 't':
                                tcp_port_rdp = strtol(optarg, NULL, 10);
                                break;

                        case 'K':
                                grab_keyboard = False;
                                break;

                        case 'w':
                                strncpy(title, optarg, sizeof(title));
                                break;

                        case 'h':
                        case '?':
                        default:
                                usage(argv[0]);
                                return 1;
                }
        }

        if (argc - optind < 1)
        {
                usage(argv[0]);
                return 1;
        }

        server = argv[optind];

        if (username[0] == 0)
        {
                pw = getpwuid(getuid());
                if ((pw == NULL) || (pw->pw_name == NULL))
                {
                        error("could not determine username, use -u\n");
                        return 1;
                }

                STRNCPY(username, pw->pw_name, sizeof(username));
        }

        if (hostname[0] == 0)
        {
                if (gethostname(fullhostname, sizeof(fullhostname)) == -1)
                {
                        error("could not determine local hostname, use -n\n");
                        return 1;
                }

                p = strchr(fullhostname, '.');
                if (p != NULL)
                        *p = 0;

                STRNCPY(hostname, fullhostname, sizeof(hostname));
        }

        if (prompt_password && read_password(password, sizeof(password)))
                flags |= RDP_LOGON_AUTO;

        if (title[0] == 0)
        {
                strcpy(title, "rdesktop - ");
                strncat(title, server, sizeof(title) - sizeof("rdesktop - "));
        }

        if (!ui_init())
                return 1;

        if (!rdp_connect(server, flags, domain, password, shell, directory))
                return 1;

        DEBUG(("Connection successful.\n"));
        memset(password, 0, sizeof(password));

        if (ui_create_window())
        {
                rdp_main_loop();
                ui_destroy_window();
        }

        DEBUG(("Disconnecting...\n"));
        rdp_disconnect();
        ui_deinit();
        return 0;
}

#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)
{
        struct stat st;
        struct tms tmsbuf;
        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))
        {
                n = read(fd, random, 32);
                close(fd);
                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) */
        gettimeofday((struct timeval *) &r[3], NULL);   /* sec and usec */
        stat("/tmp", &st);
        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 */
void *
xmalloc(int size)
{
        void *mem = malloc(size);
        if (mem == NULL)
        {
                error("xmalloc %d\n", size);
                exit(1);
        }
        return mem;
}

/* realloc; exit if out of memory */
void *
xrealloc(void *oldmem, int size)
{
        void *mem = realloc(oldmem, size);
        if (mem == NULL)
        {
                error("xrealloc %d\n", size);
                exit(1);
        }
        return mem;
}

/* free */
void
xfree(void *mem)
{
        free(mem);
}

/* 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 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, unsigned int len)
{
        unsigned char *line = p;
        unsigned int thisline, offset = 0;
        int i;

        while (offset < len)
        {
                printf("%04x ", offset);
                thisline = len - offset;
                if (thisline > 16)
                        thisline = 16;

                for (i = 0; i < thisline; i++)
                        printf("%02x ", line[i]);

                for (; i < 16; i++)
                        printf("   ");

                for (i = 0; i < thisline; i++)
                        printf("%c", (line[i] >= 0x20 && line[i] < 0x7f) ? line[i] : '.');

                printf("\n");
                offset += thisline;
                line += thisline;
        }
}

#ifdef SAVE_LICENCE
int
load_licence(unsigned char **data)
{
        char path[PATH_MAX];
        char *home;
        struct stat st;
        int fd;

        home = getenv("HOME");
        if (home == NULL)
                return -1;

        STRNCPY(path, home, sizeof(path));
        strncat(path, "/.rdesktop/licence", sizeof(path) - strlen(path) - 1);

        fd = open(path, O_RDONLY);
        if (fd == -1)
                return -1;

        if (fstat(fd, &st))
                return -1;

        *data = xmalloc(st.st_size);
        return read(fd, *data, st.st_size);
}

void
save_licence(unsigned char *data, int length)
{
        char path[PATH_MAX];
        char *home;
        int fd;

        home = getenv("HOME");
        if (home == NULL)
                return;

        STRNCPY(path, home, sizeof(path));
        strncat(path, "/.rdesktop", sizeof(path) - strlen(path) - 1);
        mkdir(path, 0700);

        strncat(path, "/licence", sizeof(path) - strlen(path) - 1);

        fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0600);
        if (fd == -1)
        {
                perror("open");
                return;
        }

        write(fd, data, length);
        close(fd);
}
#endif
1	matty	10	/*
2			rdesktop: A Remote Desktop Protocol client.
3			Entrypoint and utility functions
4	matthewc	122	Copyright (C) Matthew Chapman 1999-2002
5	jsorg71	100
6	matty	10	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	jsorg71	100
11	matty	10	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	jsorg71	100
16	matty	10	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	matty	30	#include <stdarg.h> /* va_list va_start va_end */
22	matty	24	#include <unistd.h> /* read close getuid getgid getpid getppid gethostname */
23			#include <fcntl.h> /* open */
24			#include <pwd.h> /* getpwuid */
25	matthewc	39	#include <limits.h> /* PATH_MAX */
26	matthewc	211	#include <termios.h> /* tcgetattr tcsetattr */
27	matty	24	#include <sys/stat.h> /* stat */
28			#include <sys/time.h> /* gettimeofday */
29			#include <sys/times.h> /* times */
30	matty	10	#include "rdesktop.h"
31
32	matthewc	220	#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	astrand	107	char title[32] = "";
44	matty	10	char username[16];
45			char hostname[16];
46	matthewc	38	char keymapname[16];
47	astrand	66	int keylayout = 0x409; /* Defaults to US keyboard layout */
48	matthewc	160	int width = 800;
49			int height = 600;
50	jsorg71	58	int tcp_port_rdp = TCP_PORT_RDP;
51	matty	28	BOOL bitmap_compression = True;
52	matty	29	BOOL sendmotion = True;
53	matty	10	BOOL orders = True;
54	matty	30	BOOL encryption = True;
55	matty	28	BOOL desktop_save = True;
56			BOOL fullscreen = False;
57	astrand	76	BOOL grab_keyboard = True;
58	matty	10
59			/* Display usage information */
60	matty	25	static void
61			usage(char *program)
62	matty	10	{
63	matthewc	122	fprintf(stderr, "rdesktop: A Remote Desktop Protocol client.\n");
64			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	astrand	111	fprintf(stderr, "Usage: %s [options] server\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	matthewc	211	fprintf(stderr, " -p: password (- to prompt)\n");
73	astrand	111	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, " -t: rdp tcp port\n");
81			fprintf(stderr, " -K: keep window manager key bindings\n");
82			fprintf(stderr, " -w: window title\n");
83	matty	10	}
84
85	matthewc	211	static BOOL
86			read_password(char *password, int size)
87			{
88			struct termios tios;
89			BOOL ret = False;
90			int istty = 0;
91			char *p;
92
93			if (tcgetattr(STDIN_FILENO, &tios) == 0)
94			{
95			fprintf(stderr, "Password: ");
96			tios.c_lflag &= ~ECHO;
97			tcsetattr(STDIN_FILENO, TCSANOW, &tios);
98			istty = 1;
99			}
100
101			if (fgets(password, size, stdin) != NULL)
102			{
103			ret = True;
104
105			/* strip final newline */
106			p = strchr(password, '\n');
107			if (p != NULL)
108			*p = 0;
109			}
110
111			if (istty)
112			{
113			tios.c_lflag \|= ECHO;
114			tcsetattr(STDIN_FILENO, TCSANOW, &tios);
115			fprintf(stderr, "\n");
116			}
117
118			return ret;
119			}
120
121	matty	10	/* Client program */
122	matty	25	int
123			main(int argc, char *argv[])
124	matty	10	{
125	matty	30	char fullhostname[64];
126	matty	21	char domain[16];
127			char password[16];
128			char shell[32];
129			char directory[32];
130	matthewc	211	BOOL prompt_password;
131	matty	30	struct passwd *pw;
132			char server, p;
133			uint32 flags;
134	matty	10	int c;
135
136	matty	21	flags = RDP_LOGON_NORMAL;
137	matthewc	211	prompt_password = False;
138	matty	21	domain[0] = password[0] = shell[0] = directory[0] = 0;
139	matthewc	38	strcpy(keymapname, "us");
140	matty	21
141	matthewc	214	while ((c = getopt(argc, argv, "u:d:s:c:p:n:k:g:t:fbemKw:h?")) != -1)
142	matty	10	{
143			switch (c)
144			{
145			case 'u':
146	matty	30	STRNCPY(username, optarg, sizeof(username));
147	matty	10	break;
148
149	matty	21	case 'd':
150	matty	30	STRNCPY(domain, optarg, sizeof(domain));
151	matty	21	break;
152
153			case 's':
154	matty	30	STRNCPY(shell, optarg, sizeof(shell));
155	matty	21	break;
156
157			case 'c':
158	matty	30	STRNCPY(directory, optarg, sizeof(directory));
159	matty	21	break;
160
161	matty	30	case 'p':
162	matthewc	211	if ((optarg[0] == '-') && (optarg[1] == 0))
163			{
164			prompt_password = True;
165			break;
166			}
167
168	matty	30	STRNCPY(password, optarg, sizeof(password));
169			flags \|= RDP_LOGON_AUTO;
170	matthewc	211
171			/* try to overwrite argument so it won't appear in ps */
172	n-ki	171	p = optarg;
173			while (*p)
174			*(p++) = 'X';
175	matty	30	break;
176
177	matty	10	case 'n':
178	matty	30	STRNCPY(hostname, optarg, sizeof(hostname));
179	matty	10	break;
180
181			case 'k':
182	astrand	82	STRNCPY(keymapname, optarg, sizeof(keymapname));
183	matty	10	break;
184
185	matty	30	case 'g':
186			width = strtol(optarg, &p, 10);
187			if (*p == 'x')
188	astrand	64	height = strtol(p + 1, NULL, 10);
189	matty	30
190			if ((width == 0) \|\| (height == 0))
191			{
192			error("invalid geometry\n");
193			return 1;
194			}
195	matty	10	break;
196
197	matty	30	case 'f':
198			fullscreen = True;
199			break;
200
201	matty	10	case 'b':
202			orders = False;
203			break;
204
205	matty	30	case 'e':
206			encryption = False;
207	matty	10	break;
208
209	matty	30	case 'm':
210			sendmotion = False;
211	matty	28	break;
212	matty	29
213	jsorg71	58	case 't':
214			tcp_port_rdp = strtol(optarg, NULL, 10);
215			break;
216
217	astrand	76	case 'K':
218			grab_keyboard = False;
219			break;
220
221	astrand	107	case 'w':
222			strncpy(title, optarg, sizeof(title));
223			break;
224
225	matty	28	case 'h':
226	matty	10	case '?':
227			default:
228			usage(argv[0]);
229			return 1;
230			}
231			}
232
233			if (argc - optind < 1)
234			{
235			usage(argv[0]);
236			return 1;
237			}
238
239			server = argv[optind];
240
241			if (username[0] == 0)
242			{
243			pw = getpwuid(getuid());
244			if ((pw == NULL) \|\| (pw->pw_name == NULL))
245			{
246	matty	30	error("could not determine username, use -u\n");
247	matty	10	return 1;
248			}
249
250	matty	30	STRNCPY(username, pw->pw_name, sizeof(username));
251	matty	10	}
252
253			if (hostname[0] == 0)
254			{
255	matty	30	if (gethostname(fullhostname, sizeof(fullhostname)) == -1)
256	matty	10	{
257	matty	30	error("could not determine local hostname, use -n\n");
258	matty	10	return 1;
259			}
260	matty	30
261			p = strchr(fullhostname, '.');
262			if (p != NULL)
263			*p = 0;
264
265			STRNCPY(hostname, fullhostname, sizeof(hostname));
266	matty	10	}
267
268	matthewc	211	if (prompt_password && read_password(password, sizeof(password)))
269			flags \|= RDP_LOGON_AUTO;
270	matty	30
271	matthewc	211	if (title[0] == 0)
272	astrand	107	{
273			strcpy(title, "rdesktop - ");
274			strncat(title, server, sizeof(title) - sizeof("rdesktop - "));
275			}
276	matty	12
277	astrand	82	if (!ui_init())
278			return 1;
279	astrand	66
280	matthewc	53	if (!rdp_connect(server, flags, domain, password, shell, directory))
281			return 1;
282
283	matthewc	122	DEBUG(("Connection successful.\n"));
284	matthewc	211	memset(password, 0, sizeof(password));
285	matthewc	53
286	jsorg71	100	if (ui_create_window())
287	matty	10	{
288			rdp_main_loop();
289			ui_destroy_window();
290			}
291
292	matthewc	122	DEBUG(("Disconnecting...\n"));
293	matthewc	53	rdp_disconnect();
294	matthewc	188	ui_deinit();
295	matty	10	return 0;
296			}
297
298	matthewc	220	#ifdef EGD_SOCKET
299			/* Read 32 random bytes from PRNGD or EGD socket (based on OpenSSL RAND_egd) */
300			static BOOL
301			generate_random_egd(uint8 * buf)
302			{
303			struct sockaddr_un addr;
304			BOOL ret = False;
305			int fd;
306
307			fd = socket(AF_UNIX, SOCK_STREAM, 0);
308			if (fd == -1)
309			return False;
310
311			addr.sun_family = AF_UNIX;
312			memcpy(addr.sun_path, EGD_SOCKET, sizeof(EGD_SOCKET));
313			if (connect(fd, (struct sockaddr *)&addr, sizeof(addr)) == -1)
314			goto err;
315
316			/* PRNGD and EGD use a simple communications protocol */
317			buf[0] = 1; /* Non-blocking (similar to /dev/urandom) */
318			buf[1] = 32; /* Number of requested random bytes */
319			if (write(fd, buf, 2) != 2)
320			goto err;
321
322			if ((read(fd, buf, 1) != 1) \|\| (buf[0] == 0)) /* Available? */
323			goto err;
324
325			if (read(fd, buf, 32) != 32)
326			goto err;
327
328			ret = True;
329
330			err:
331			close(fd);
332			return ret;
333			}
334			#endif
335
336	matty	10	/* Generate a 32-byte random for the secure transport code. */
337	matty	25	void
338	astrand	64	generate_random(uint8 * random)
339	matty	10	{
340			struct stat st;
341	matty	22	struct tms tmsbuf;
342	matthewc	220	MD5_CTX md5;
343			uint32 *r;
344			int fd, n;
345	matty	10
346	matthewc	220	/* If we have a kernel random device, try that first */
347	matty	30	if (((fd = open("/dev/urandom", O_RDONLY)) != -1)
348			\|\| ((fd = open("/dev/random", O_RDONLY)) != -1))
349	matty	10	{
350	matthewc	220	n = read(fd, random, 32);
351	matty	10	close(fd);
352	matthewc	220	if (n == 32)
353			return;
354	matty	10	}
355
356	matthewc	220	#ifdef EGD_SOCKET
357			/* As a second preference use an EGD */
358			if (generate_random_egd(random))
359			return;
360			#endif
361
362	matty	10	/* Otherwise use whatever entropy we can gather - ideas welcome. */
363	matthewc	220	r = (uint32 *)random;
364	matty	10	r[0] = (getpid()) \| (getppid() << 16);
365			r[1] = (getuid()) \| (getgid() << 16);
366	matty	24	r[2] = times(&tmsbuf); /* system uptime (clocks) */
367			gettimeofday((struct timeval ) &r[3], NULL); / sec and usec */
368	matty	10	stat("/tmp", &st);
369			r[5] = st.st_atime;
370			r[6] = st.st_mtime;
371			r[7] = st.st_ctime;
372	matthewc	220
373			/* Hash both halves with MD5 to obscure possible patterns */
374			MD5_Init(&md5);
375			MD5_Update(&md5, random, 16);
376			MD5_Final(random, &md5);
377			MD5_Update(&md5, random+16, 16);
378			MD5_Final(random+16, &md5);
379	matty	10	}
380
381			/* malloc; exit if out of memory */
382	matty	25	void *
383			xmalloc(int size)
384	matty	10	{
385			void *mem = malloc(size);
386			if (mem == NULL)
387			{
388	matty	30	error("xmalloc %d\n", size);
389	matty	10	exit(1);
390			}
391			return mem;
392			}
393
394			/* realloc; exit if out of memory */
395	matty	25	void *
396			xrealloc(void *oldmem, int size)
397	matty	10	{
398			void *mem = realloc(oldmem, size);
399			if (mem == NULL)
400			{
401	matty	30	error("xrealloc %d\n", size);
402	matty	10	exit(1);
403			}
404			return mem;
405			}
406
407			/* free */
408	matty	25	void
409			xfree(void *mem)
410	matty	10	{
411			free(mem);
412			}
413
414	matty	30	/* report an error */
415	matty	25	void
416	matty	30	error(char *format, ...)
417			{
418			va_list ap;
419
420			fprintf(stderr, "ERROR: ");
421
422			va_start(ap, format);
423			vfprintf(stderr, format, ap);
424			va_end(ap);
425			}
426
427			/* report an unimplemented protocol feature */
428			void
429			unimpl(char *format, ...)
430			{
431			va_list ap;
432
433			fprintf(stderr, "NOT IMPLEMENTED: ");
434
435			va_start(ap, format);
436			vfprintf(stderr, format, ap);
437			va_end(ap);
438			}
439
440			/* produce a hex dump */
441			void
442	matty	25	hexdump(unsigned char *p, unsigned int len)
443	matty	10	{
444			unsigned char *line = p;
445			unsigned int thisline, offset = 0;
446			int i;
447
448			while (offset < len)
449			{
450	matthewc	169	printf("%04x ", offset);
451	matty	10	thisline = len - offset;
452			if (thisline > 16)
453			thisline = 16;
454
455			for (i = 0; i < thisline; i++)
456	matthewc	169	printf("%02x ", line[i]);
457	matty	10
458	matty	30	for (; i < 16; i++)
459	matthewc	169	printf(" ");
460	matty	30
461	matty	10	for (i = 0; i < thisline; i++)
462	matthewc	169	printf("%c", (line[i] >= 0x20 && line[i] < 0x7f) ? line[i] : '.');
463	matty	10
464	matthewc	169	printf("\n");
465	matty	10	offset += thisline;
466			line += thisline;
467			}
468			}
469	matthewc	39
470	matthewc	159	#ifdef SAVE_LICENCE
471	matthewc	39	int
472			load_licence(unsigned char **data)
473			{
474			char path[PATH_MAX];
475			char *home;
476			struct stat st;
477			int fd;
478
479			home = getenv("HOME");
480			if (home == NULL)
481			return -1;
482
483			STRNCPY(path, home, sizeof(path));
484	astrand	64	strncat(path, "/.rdesktop/licence", sizeof(path) - strlen(path) - 1);
485	matthewc	39
486			fd = open(path, O_RDONLY);
487			if (fd == -1)
488			return -1;
489
490			if (fstat(fd, &st))
491			return -1;
492
493			*data = xmalloc(st.st_size);
494			return read(fd, *data, st.st_size);
495			}
496
497			void
498			save_licence(unsigned char *data, int length)
499			{
500			char path[PATH_MAX];
501			char *home;
502			int fd;
503
504			home = getenv("HOME");
505			if (home == NULL)
506			return;
507
508			STRNCPY(path, home, sizeof(path));
509	astrand	64	strncat(path, "/.rdesktop", sizeof(path) - strlen(path) - 1);
510	matthewc	39	mkdir(path, 0700);
511
512	astrand	64	strncat(path, "/licence", sizeof(path) - strlen(path) - 1);
513	matthewc	39
514	astrand	64	fd = open(path, O_WRONLY \| O_CREAT \| O_TRUNC, 0600);
515	matthewc	39	if (fd == -1)
516			{
517			perror("open");
518			return;
519			}
520
521			write(fd, data, length);
522			close(fd);
523			}
524	matthewc	159	#endif