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;
BOOL hide_decorations = False;

/* 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[:port]\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, "   -K: keep window manager key bindings\n");
        fprintf(stderr, "   -T: window title\n");
        fprintf(stderr, "   -D: hide window manager decorations\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 server[64];
        char fullhostname[64];
        char domain[16];
        char password[16];
        char shell[128];
        char directory[32];
        BOOL prompt_password;
        struct passwd *pw;
        uint32 flags;
        char *p;
        int c;

        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:k:g:fbemKT:Dh?")) != -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 'K':
                                grab_keyboard = False;
                                break;

                        case 'T':
                                STRNCPY(title, optarg, sizeof(title));
                                break;

                        case 'D':
                                hide_decorations = True;
                                break;

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

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

        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)
        {
                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	astrand	262	BOOL hide_decorations = False;
59	matty	10
60			/* Display usage information */
61	matty	25	static void
62			usage(char *program)
63	matty	10	{
64	matthewc	122	fprintf(stderr, "rdesktop: A Remote Desktop Protocol client.\n");
65			fprintf(stderr, "Version " VERSION ". Copyright (C) 1999-2002 Matt Chapman.\n");
66			fprintf(stderr, "See http://www.rdesktop.org/ for more information.\n\n");
67
68	matthewc	222	fprintf(stderr, "Usage: %s [options] server[:port]\n", program);
69	astrand	111	fprintf(stderr, " -u: user name\n");
70			fprintf(stderr, " -d: domain\n");
71			fprintf(stderr, " -s: shell\n");
72			fprintf(stderr, " -c: working directory\n");
73	matthewc	211	fprintf(stderr, " -p: password (- to prompt)\n");
74	astrand	111	fprintf(stderr, " -n: client hostname\n");
75	matthewc	223	fprintf(stderr, " -k: keyboard layout on terminal server (us,sv,gr,etc.)\n");
76	astrand	111	fprintf(stderr, " -g: desktop geometry (WxH)\n");
77			fprintf(stderr, " -f: full-screen mode\n");
78			fprintf(stderr, " -b: force bitmap updates\n");
79			fprintf(stderr, " -e: disable encryption (French TS)\n");
80			fprintf(stderr, " -m: do not send motion events\n");
81			fprintf(stderr, " -K: keep window manager key bindings\n");
82	matthewc	223	fprintf(stderr, " -T: window title\n");
83	astrand	262	fprintf(stderr, " -D: hide window manager decorations\n");
84	matty	10	}
85
86	matthewc	211	static BOOL
87			read_password(char *password, int size)
88			{
89			struct termios tios;
90			BOOL ret = False;
91			int istty = 0;
92			char *p;
93
94			if (tcgetattr(STDIN_FILENO, &tios) == 0)
95			{
96			fprintf(stderr, "Password: ");
97			tios.c_lflag &= ~ECHO;
98			tcsetattr(STDIN_FILENO, TCSANOW, &tios);
99			istty = 1;
100			}
101
102			if (fgets(password, size, stdin) != NULL)
103			{
104			ret = True;
105
106			/* strip final newline */
107			p = strchr(password, '\n');
108			if (p != NULL)
109			*p = 0;
110			}
111
112			if (istty)
113			{
114			tios.c_lflag \|= ECHO;
115			tcsetattr(STDIN_FILENO, TCSANOW, &tios);
116			fprintf(stderr, "\n");
117			}
118
119			return ret;
120			}
121
122	matty	10	/* Client program */
123	matty	25	int
124			main(int argc, char *argv[])
125	matty	10	{
126	matthewc	222	char server[64];
127	matty	30	char fullhostname[64];
128	matty	21	char domain[16];
129			char password[16];
130	astrand	238	char shell[128];
131	matty	21	char directory[32];
132	matthewc	211	BOOL prompt_password;
133	matty	30	struct passwd *pw;
134			uint32 flags;
135	matthewc	222	char *p;
136	matty	10	int c;
137
138	matty	21	flags = RDP_LOGON_NORMAL;
139	matthewc	211	prompt_password = False;
140	matty	21	domain[0] = password[0] = shell[0] = directory[0] = 0;
141	matthewc	240	strcpy(keymapname, "en-us");
142	matty	21
143	astrand	262	while ((c = getopt(argc, argv, "u:d:s:c:p:n:k:g:fbemKT:Dh?")) != -1)
144	matty	10	{
145			switch (c)
146			{
147			case 'u':
148	matty	30	STRNCPY(username, optarg, sizeof(username));
149	matty	10	break;
150
151	matty	21	case 'd':
152	matty	30	STRNCPY(domain, optarg, sizeof(domain));
153	matty	21	break;
154
155			case 's':
156	matty	30	STRNCPY(shell, optarg, sizeof(shell));
157	matty	21	break;
158
159			case 'c':
160	matty	30	STRNCPY(directory, optarg, sizeof(directory));
161	matty	21	break;
162
163	matty	30	case 'p':
164	matthewc	211	if ((optarg[0] == '-') && (optarg[1] == 0))
165			{
166			prompt_password = True;
167			break;
168			}
169
170	matty	30	STRNCPY(password, optarg, sizeof(password));
171			flags \|= RDP_LOGON_AUTO;
172	matthewc	211
173			/* try to overwrite argument so it won't appear in ps */
174	n-ki	171	p = optarg;
175			while (*p)
176			*(p++) = 'X';
177	matty	30	break;
178
179	matty	10	case 'n':
180	matty	30	STRNCPY(hostname, optarg, sizeof(hostname));
181	matty	10	break;
182
183			case 'k':
184	astrand	82	STRNCPY(keymapname, optarg, sizeof(keymapname));
185	matty	10	break;
186
187	matty	30	case 'g':
188			width = strtol(optarg, &p, 10);
189			if (*p == 'x')
190	astrand	64	height = strtol(p + 1, NULL, 10);
191	matty	30
192			if ((width == 0) \|\| (height == 0))
193			{
194			error("invalid geometry\n");
195			return 1;
196			}
197	matty	10	break;
198
199	matty	30	case 'f':
200			fullscreen = True;
201			break;
202
203	matty	10	case 'b':
204			orders = False;
205			break;
206
207	matty	30	case 'e':
208			encryption = False;
209	matty	10	break;
210
211	matty	30	case 'm':
212			sendmotion = False;
213	matty	28	break;
214	matty	29
215	astrand	76	case 'K':
216			grab_keyboard = False;
217			break;
218
219	matthewc	223	case 'T':
220	matthewc	222	STRNCPY(title, optarg, sizeof(title));
221	astrand	107	break;
222
223	astrand	262	case 'D':
224			hide_decorations = True;
225			break;
226
227	matty	28	case 'h':
228	matty	10	case '?':
229			default:
230			usage(argv[0]);
231			return 1;
232			}
233			}
234
235			if (argc - optind < 1)
236			{
237			usage(argv[0]);
238			return 1;
239			}
240
241	matthewc	222	STRNCPY(server, argv[optind], sizeof(server));
242			p = strchr(server, ':');
243			if (p != NULL)
244			{
245			tcp_port_rdp = strtol(p + 1, NULL, 10);
246			*p = 0;
247			}
248	matty	10
249			if (username[0] == 0)
250			{
251			pw = getpwuid(getuid());
252			if ((pw == NULL) \|\| (pw->pw_name == NULL))
253			{
254	matty	30	error("could not determine username, use -u\n");
255	matty	10	return 1;
256			}
257
258	matty	30	STRNCPY(username, pw->pw_name, sizeof(username));
259	matty	10	}
260
261			if (hostname[0] == 0)
262			{
263	matty	30	if (gethostname(fullhostname, sizeof(fullhostname)) == -1)
264	matty	10	{
265	matty	30	error("could not determine local hostname, use -n\n");
266	matty	10	return 1;
267			}
268	matty	30
269			p = strchr(fullhostname, '.');
270			if (p != NULL)
271			*p = 0;
272
273			STRNCPY(hostname, fullhostname, sizeof(hostname));
274	matty	10	}
275
276	matthewc	211	if (prompt_password && read_password(password, sizeof(password)))
277			flags \|= RDP_LOGON_AUTO;
278	matty	30
279	matthewc	211	if (title[0] == 0)
280	astrand	107	{
281			strcpy(title, "rdesktop - ");
282			strncat(title, server, sizeof(title) - sizeof("rdesktop - "));
283			}
284	matty	12
285	astrand	82	if (!ui_init())
286			return 1;
287	astrand	66
288	matthewc	53	if (!rdp_connect(server, flags, domain, password, shell, directory))
289			return 1;
290
291	matthewc	122	DEBUG(("Connection successful.\n"));
292	matthewc	211	memset(password, 0, sizeof(password));
293	matthewc	53
294	jsorg71	100	if (ui_create_window())
295	matty	10	{
296			rdp_main_loop();
297			ui_destroy_window();
298			}
299
300	matthewc	122	DEBUG(("Disconnecting...\n"));
301	matthewc	53	rdp_disconnect();
302	matthewc	188	ui_deinit();
303	matty	10	return 0;
304			}
305
306	matthewc	220	#ifdef EGD_SOCKET
307			/* Read 32 random bytes from PRNGD or EGD socket (based on OpenSSL RAND_egd) */
308			static BOOL
309			generate_random_egd(uint8 * buf)
310			{
311			struct sockaddr_un addr;
312			BOOL ret = False;
313			int fd;
314
315			fd = socket(AF_UNIX, SOCK_STREAM, 0);
316			if (fd == -1)
317			return False;
318
319			addr.sun_family = AF_UNIX;
320			memcpy(addr.sun_path, EGD_SOCKET, sizeof(EGD_SOCKET));
321	astrand	259	if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1)
322	matthewc	220	goto err;
323
324			/* PRNGD and EGD use a simple communications protocol */
325	astrand	259	buf[0] = 1; /* Non-blocking (similar to /dev/urandom) */
326			buf[1] = 32; /* Number of requested random bytes */
327	matthewc	220	if (write(fd, buf, 2) != 2)
328			goto err;
329
330	astrand	259	if ((read(fd, buf, 1) != 1) \|\| (buf[0] == 0)) /* Available? */
331	matthewc	220	goto err;
332
333			if (read(fd, buf, 32) != 32)
334			goto err;
335
336			ret = True;
337
338	astrand	259	err:
339	matthewc	220	close(fd);
340			return ret;
341			}
342			#endif
343
344	matty	10	/* Generate a 32-byte random for the secure transport code. */
345	matty	25	void
346	astrand	64	generate_random(uint8 * random)
347	matty	10	{
348			struct stat st;
349	matty	22	struct tms tmsbuf;
350	matthewc	220	MD5_CTX md5;
351			uint32 *r;
352			int fd, n;
353	matty	10
354	matthewc	220	/* If we have a kernel random device, try that first */
355	matty	30	if (((fd = open("/dev/urandom", O_RDONLY)) != -1)
356			\|\| ((fd = open("/dev/random", O_RDONLY)) != -1))
357	matty	10	{
358	matthewc	220	n = read(fd, random, 32);
359	matty	10	close(fd);
360	matthewc	220	if (n == 32)
361			return;
362	matty	10	}
363
364	matthewc	220	#ifdef EGD_SOCKET
365			/* As a second preference use an EGD */
366			if (generate_random_egd(random))
367			return;
368			#endif
369
370	matty	10	/* Otherwise use whatever entropy we can gather - ideas welcome. */
371	astrand	259	r = (uint32 *) random;
372	matty	10	r[0] = (getpid()) \| (getppid() << 16);
373			r[1] = (getuid()) \| (getgid() << 16);
374	matty	24	r[2] = times(&tmsbuf); /* system uptime (clocks) */
375			gettimeofday((struct timeval ) &r[3], NULL); / sec and usec */
376	matty	10	stat("/tmp", &st);
377			r[5] = st.st_atime;
378			r[6] = st.st_mtime;
379			r[7] = st.st_ctime;
380	matthewc	220
381			/* Hash both halves with MD5 to obscure possible patterns */
382			MD5_Init(&md5);
383	astrand	259	MD5_Update(&md5, random, 16);
384	matthewc	220	MD5_Final(random, &md5);
385	astrand	259	MD5_Update(&md5, random + 16, 16);
386			MD5_Final(random + 16, &md5);
387	matty	10	}
388
389			/* malloc; exit if out of memory */
390	matty	25	void *
391			xmalloc(int size)
392	matty	10	{
393			void *mem = malloc(size);
394			if (mem == NULL)
395			{
396	matty	30	error("xmalloc %d\n", size);
397	matty	10	exit(1);
398			}
399			return mem;
400			}
401
402			/* realloc; exit if out of memory */
403	matty	25	void *
404			xrealloc(void *oldmem, int size)
405	matty	10	{
406			void *mem = realloc(oldmem, size);
407			if (mem == NULL)
408			{
409	matty	30	error("xrealloc %d\n", size);
410	matty	10	exit(1);
411			}
412			return mem;
413			}
414
415			/* free */
416	matty	25	void
417			xfree(void *mem)
418	matty	10	{
419			free(mem);
420			}
421
422	matty	30	/* report an error */
423	matty	25	void
424	matty	30	error(char *format, ...)
425			{
426			va_list ap;
427
428			fprintf(stderr, "ERROR: ");
429
430			va_start(ap, format);
431			vfprintf(stderr, format, ap);
432			va_end(ap);
433			}
434
435			/* report an unimplemented protocol feature */
436			void
437			unimpl(char *format, ...)
438			{
439			va_list ap;
440
441			fprintf(stderr, "NOT IMPLEMENTED: ");
442
443			va_start(ap, format);
444			vfprintf(stderr, format, ap);
445			va_end(ap);
446			}
447
448			/* produce a hex dump */
449			void
450	matty	25	hexdump(unsigned char *p, unsigned int len)
451	matty	10	{
452			unsigned char *line = p;
453			unsigned int thisline, offset = 0;
454			int i;
455
456			while (offset < len)
457			{
458	matthewc	169	printf("%04x ", offset);
459	matty	10	thisline = len - offset;
460			if (thisline > 16)
461			thisline = 16;
462
463			for (i = 0; i < thisline; i++)
464	matthewc	169	printf("%02x ", line[i]);
465	matty	10
466	matty	30	for (; i < 16; i++)
467	matthewc	169	printf(" ");
468	matty	30
469	matty	10	for (i = 0; i < thisline; i++)
470	matthewc	169	printf("%c", (line[i] >= 0x20 && line[i] < 0x7f) ? line[i] : '.');
471	matty	10
472	matthewc	169	printf("\n");
473	matty	10	offset += thisline;
474			line += thisline;
475			}
476			}
477	matthewc	39
478	matthewc	159	#ifdef SAVE_LICENCE
479	matthewc	39	int
480			load_licence(unsigned char **data)
481			{
482			char path[PATH_MAX];
483			char *home;
484			struct stat st;
485			int fd;
486
487			home = getenv("HOME");
488			if (home == NULL)
489			return -1;
490
491			STRNCPY(path, home, sizeof(path));
492	astrand	64	strncat(path, "/.rdesktop/licence", sizeof(path) - strlen(path) - 1);
493	matthewc	39
494			fd = open(path, O_RDONLY);
495			if (fd == -1)
496			return -1;
497
498			if (fstat(fd, &st))
499			return -1;
500
501			*data = xmalloc(st.st_size);
502			return read(fd, *data, st.st_size);
503			}
504
505			void
506			save_licence(unsigned char *data, int length)
507			{
508			char path[PATH_MAX];
509			char *home;
510			int fd;
511
512			home = getenv("HOME");
513			if (home == NULL)
514			return;
515
516			STRNCPY(path, home, sizeof(path));
517	astrand	64	strncat(path, "/.rdesktop", sizeof(path) - strlen(path) - 1);
518	matthewc	39	mkdir(path, 0700);
519
520	astrand	64	strncat(path, "/licence", sizeof(path) - strlen(path) - 1);
521	matthewc	39
522	astrand	64	fd = open(path, O_WRONLY \| O_CREAT \| O_TRUNC, 0600);
523	matthewc	39	if (fd == -1)
524			{
525			perror("open");
526			return;
527			}
528
529			write(fd, data, length);
530			close(fd);
531			}
532	matthewc	159	#endif