rdesktop/trunk/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;                /* If width or height are reset to zero, the geometry will 
                                   be fetched from _NET_WORKAREA */
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':
                                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))
                                {
                                        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	astrand	263	int width = 800; /* If width or height are reset to zero, the geometry will
49			be fetched from _NET_WORKAREA */
50	matthewc	160	int height = 600;
51	jsorg71	58	int tcp_port_rdp = TCP_PORT_RDP;
52	matty	28	BOOL bitmap_compression = True;
53	matty	29	BOOL sendmotion = True;
54	matty	10	BOOL orders = True;
55	matty	30	BOOL encryption = True;
56	matty	28	BOOL desktop_save = True;
57			BOOL fullscreen = False;
58	astrand	76	BOOL grab_keyboard = True;
59	astrand	262	BOOL hide_decorations = False;
60	matty	10
61			/* Display usage information */
62	matty	25	static void
63			usage(char *program)
64	matty	10	{
65	matthewc	122	fprintf(stderr, "rdesktop: A Remote Desktop Protocol client.\n");
66			fprintf(stderr, "Version " VERSION ". Copyright (C) 1999-2002 Matt Chapman.\n");
67			fprintf(stderr, "See http://www.rdesktop.org/ for more information.\n\n");
68
69	matthewc	222	fprintf(stderr, "Usage: %s [options] server[:port]\n", program);
70	astrand	111	fprintf(stderr, " -u: user name\n");
71			fprintf(stderr, " -d: domain\n");
72			fprintf(stderr, " -s: shell\n");
73			fprintf(stderr, " -c: working directory\n");
74	matthewc	211	fprintf(stderr, " -p: password (- to prompt)\n");
75	astrand	111	fprintf(stderr, " -n: client hostname\n");
76	matthewc	223	fprintf(stderr, " -k: keyboard layout on terminal server (us,sv,gr,etc.)\n");
77	astrand	111	fprintf(stderr, " -g: desktop geometry (WxH)\n");
78			fprintf(stderr, " -f: full-screen mode\n");
79			fprintf(stderr, " -b: force bitmap updates\n");
80			fprintf(stderr, " -e: disable encryption (French TS)\n");
81			fprintf(stderr, " -m: do not send motion events\n");
82			fprintf(stderr, " -K: keep window manager key bindings\n");
83	matthewc	223	fprintf(stderr, " -T: window title\n");
84	astrand	262	fprintf(stderr, " -D: hide window manager decorations\n");
85	matty	10	}
86
87	matthewc	211	static BOOL
88			read_password(char *password, int size)
89			{
90			struct termios tios;
91			BOOL ret = False;
92			int istty = 0;
93			char *p;
94
95			if (tcgetattr(STDIN_FILENO, &tios) == 0)
96			{
97			fprintf(stderr, "Password: ");
98			tios.c_lflag &= ~ECHO;
99			tcsetattr(STDIN_FILENO, TCSANOW, &tios);
100			istty = 1;
101			}
102
103			if (fgets(password, size, stdin) != NULL)
104			{
105			ret = True;
106
107			/* strip final newline */
108			p = strchr(password, '\n');
109			if (p != NULL)
110			*p = 0;
111			}
112
113			if (istty)
114			{
115			tios.c_lflag \|= ECHO;
116			tcsetattr(STDIN_FILENO, TCSANOW, &tios);
117			fprintf(stderr, "\n");
118			}
119
120			return ret;
121			}
122
123	matty	10	/* Client program */
124	matty	25	int
125			main(int argc, char *argv[])
126	matty	10	{
127	matthewc	222	char server[64];
128	matty	30	char fullhostname[64];
129	matty	21	char domain[16];
130			char password[16];
131	astrand	238	char shell[128];
132	matty	21	char directory[32];
133	matthewc	211	BOOL prompt_password;
134	matty	30	struct passwd *pw;
135			uint32 flags;
136	matthewc	222	char *p;
137	matty	10	int c;
138
139	matty	21	flags = RDP_LOGON_NORMAL;
140	matthewc	211	prompt_password = False;
141	matty	21	domain[0] = password[0] = shell[0] = directory[0] = 0;
142	matthewc	240	strcpy(keymapname, "en-us");
143	matty	21
144	astrand	262	while ((c = getopt(argc, argv, "u:d:s:c:p:n:k:g:fbemKT:Dh?")) != -1)
145	matty	10	{
146			switch (c)
147			{
148			case 'u':
149	matty	30	STRNCPY(username, optarg, sizeof(username));
150	matty	10	break;
151
152	matty	21	case 'd':
153	matty	30	STRNCPY(domain, optarg, sizeof(domain));
154	matty	21	break;
155
156			case 's':
157	matty	30	STRNCPY(shell, optarg, sizeof(shell));
158	matty	21	break;
159
160			case 'c':
161	matty	30	STRNCPY(directory, optarg, sizeof(directory));
162	matty	21	break;
163
164	matty	30	case 'p':
165	matthewc	211	if ((optarg[0] == '-') && (optarg[1] == 0))
166			{
167			prompt_password = True;
168			break;
169			}
170
171	matty	30	STRNCPY(password, optarg, sizeof(password));
172			flags \|= RDP_LOGON_AUTO;
173	matthewc	211
174			/* try to overwrite argument so it won't appear in ps */
175	n-ki	171	p = optarg;
176			while (*p)
177			*(p++) = 'X';
178	matty	30	break;
179
180	matty	10	case 'n':
181	matty	30	STRNCPY(hostname, optarg, sizeof(hostname));
182	matty	10	break;
183
184			case 'k':
185	astrand	82	STRNCPY(keymapname, optarg, sizeof(keymapname));
186	matty	10	break;
187
188	matty	30	case 'g':
189	astrand	263	if (!strcmp(optarg, "workarea"))
190			{
191			width = height = 0;
192			break;
193			}
194
195	matty	30	width = strtol(optarg, &p, 10);
196			if (*p == 'x')
197	astrand	64	height = strtol(p + 1, NULL, 10);
198	matty	30
199			if ((width == 0) \|\| (height == 0))
200			{
201			error("invalid geometry\n");
202			return 1;
203			}
204	matty	10	break;
205
206	matty	30	case 'f':
207			fullscreen = True;
208			break;
209
210	matty	10	case 'b':
211			orders = False;
212			break;
213
214	matty	30	case 'e':
215			encryption = False;
216	matty	10	break;
217
218	matty	30	case 'm':
219			sendmotion = False;
220	matty	28	break;
221	matty	29
222	astrand	76	case 'K':
223			grab_keyboard = False;
224			break;
225
226	matthewc	223	case 'T':
227	matthewc	222	STRNCPY(title, optarg, sizeof(title));
228	astrand	107	break;
229
230	astrand	262	case 'D':
231			hide_decorations = True;
232			break;
233
234	matty	28	case 'h':
235	matty	10	case '?':
236			default:
237			usage(argv[0]);
238			return 1;
239			}
240			}
241
242			if (argc - optind < 1)
243			{
244			usage(argv[0]);
245			return 1;
246			}
247
248	matthewc	222	STRNCPY(server, argv[optind], sizeof(server));
249			p = strchr(server, ':');
250			if (p != NULL)
251			{
252			tcp_port_rdp = strtol(p + 1, NULL, 10);
253			*p = 0;
254			}
255	matty	10
256			if (username[0] == 0)
257			{
258			pw = getpwuid(getuid());
259			if ((pw == NULL) \|\| (pw->pw_name == NULL))
260			{
261	matty	30	error("could not determine username, use -u\n");
262	matty	10	return 1;
263			}
264
265	matty	30	STRNCPY(username, pw->pw_name, sizeof(username));
266	matty	10	}
267
268			if (hostname[0] == 0)
269			{
270	matty	30	if (gethostname(fullhostname, sizeof(fullhostname)) == -1)
271	matty	10	{
272	matty	30	error("could not determine local hostname, use -n\n");
273	matty	10	return 1;
274			}
275	matty	30
276			p = strchr(fullhostname, '.');
277			if (p != NULL)
278			*p = 0;
279
280			STRNCPY(hostname, fullhostname, sizeof(hostname));
281	matty	10	}
282
283	matthewc	211	if (prompt_password && read_password(password, sizeof(password)))
284			flags \|= RDP_LOGON_AUTO;
285	matty	30
286	matthewc	211	if (title[0] == 0)
287	astrand	107	{
288			strcpy(title, "rdesktop - ");
289			strncat(title, server, sizeof(title) - sizeof("rdesktop - "));
290			}
291	matty	12
292	astrand	82	if (!ui_init())
293			return 1;
294	astrand	66
295	matthewc	53	if (!rdp_connect(server, flags, domain, password, shell, directory))
296			return 1;
297
298	matthewc	122	DEBUG(("Connection successful.\n"));
299	matthewc	211	memset(password, 0, sizeof(password));
300	matthewc	53
301	jsorg71	100	if (ui_create_window())
302	matty	10	{
303			rdp_main_loop();
304			ui_destroy_window();
305			}
306
307	matthewc	122	DEBUG(("Disconnecting...\n"));
308	matthewc	53	rdp_disconnect();
309	matthewc	188	ui_deinit();
310	matty	10	return 0;
311			}
312
313	matthewc	220	#ifdef EGD_SOCKET
314			/* Read 32 random bytes from PRNGD or EGD socket (based on OpenSSL RAND_egd) */
315			static BOOL
316			generate_random_egd(uint8 * buf)
317			{
318			struct sockaddr_un addr;
319			BOOL ret = False;
320			int fd;
321
322			fd = socket(AF_UNIX, SOCK_STREAM, 0);
323			if (fd == -1)
324			return False;
325
326			addr.sun_family = AF_UNIX;
327			memcpy(addr.sun_path, EGD_SOCKET, sizeof(EGD_SOCKET));
328	astrand	259	if (connect(fd, (struct sockaddr *) &addr, sizeof(addr)) == -1)
329	matthewc	220	goto err;
330
331			/* PRNGD and EGD use a simple communications protocol */
332	astrand	259	buf[0] = 1; /* Non-blocking (similar to /dev/urandom) */
333			buf[1] = 32; /* Number of requested random bytes */
334	matthewc	220	if (write(fd, buf, 2) != 2)
335			goto err;
336
337	astrand	259	if ((read(fd, buf, 1) != 1) \|\| (buf[0] == 0)) /* Available? */
338	matthewc	220	goto err;
339
340			if (read(fd, buf, 32) != 32)
341			goto err;
342
343			ret = True;
344
345	astrand	259	err:
346	matthewc	220	close(fd);
347			return ret;
348			}
349			#endif
350
351	matty	10	/* Generate a 32-byte random for the secure transport code. */
352	matty	25	void
353	astrand	64	generate_random(uint8 * random)
354	matty	10	{
355			struct stat st;
356	matty	22	struct tms tmsbuf;
357	matthewc	220	MD5_CTX md5;
358			uint32 *r;
359			int fd, n;
360	matty	10
361	matthewc	220	/* If we have a kernel random device, try that first */
362	matty	30	if (((fd = open("/dev/urandom", O_RDONLY)) != -1)
363			\|\| ((fd = open("/dev/random", O_RDONLY)) != -1))
364	matty	10	{
365	matthewc	220	n = read(fd, random, 32);
366	matty	10	close(fd);
367	matthewc	220	if (n == 32)
368			return;
369	matty	10	}
370
371	matthewc	220	#ifdef EGD_SOCKET
372			/* As a second preference use an EGD */
373			if (generate_random_egd(random))
374			return;
375			#endif
376
377	matty	10	/* Otherwise use whatever entropy we can gather - ideas welcome. */
378	astrand	259	r = (uint32 *) random;
379	matty	10	r[0] = (getpid()) \| (getppid() << 16);
380			r[1] = (getuid()) \| (getgid() << 16);
381	matty	24	r[2] = times(&tmsbuf); /* system uptime (clocks) */
382			gettimeofday((struct timeval ) &r[3], NULL); / sec and usec */
383	matty	10	stat("/tmp", &st);
384			r[5] = st.st_atime;
385			r[6] = st.st_mtime;
386			r[7] = st.st_ctime;
387	matthewc	220
388			/* Hash both halves with MD5 to obscure possible patterns */
389			MD5_Init(&md5);
390	astrand	259	MD5_Update(&md5, random, 16);
391	matthewc	220	MD5_Final(random, &md5);
392	astrand	259	MD5_Update(&md5, random + 16, 16);
393			MD5_Final(random + 16, &md5);
394	matty	10	}
395
396			/* malloc; exit if out of memory */
397	matty	25	void *
398			xmalloc(int size)
399	matty	10	{
400			void *mem = malloc(size);
401			if (mem == NULL)
402			{
403	matty	30	error("xmalloc %d\n", size);
404	matty	10	exit(1);
405			}
406			return mem;
407			}
408
409			/* realloc; exit if out of memory */
410	matty	25	void *
411			xrealloc(void *oldmem, int size)
412	matty	10	{
413			void *mem = realloc(oldmem, size);
414			if (mem == NULL)
415			{
416	matty	30	error("xrealloc %d\n", size);
417	matty	10	exit(1);
418			}
419			return mem;
420			}
421
422			/* free */
423	matty	25	void
424			xfree(void *mem)
425	matty	10	{
426			free(mem);
427			}
428
429	matty	30	/* report an error */
430	matty	25	void
431	matty	30	error(char *format, ...)
432			{
433			va_list ap;
434
435			fprintf(stderr, "ERROR: ");
436
437			va_start(ap, format);
438			vfprintf(stderr, format, ap);
439			va_end(ap);
440			}
441
442			/* report an unimplemented protocol feature */
443			void
444			unimpl(char *format, ...)
445			{
446			va_list ap;
447
448			fprintf(stderr, "NOT IMPLEMENTED: ");
449
450			va_start(ap, format);
451			vfprintf(stderr, format, ap);
452			va_end(ap);
453			}
454
455			/* produce a hex dump */
456			void
457	matty	25	hexdump(unsigned char *p, unsigned int len)
458	matty	10	{
459			unsigned char *line = p;
460			unsigned int thisline, offset = 0;
461			int i;
462
463			while (offset < len)
464			{
465	matthewc	169	printf("%04x ", offset);
466	matty	10	thisline = len - offset;
467			if (thisline > 16)
468			thisline = 16;
469
470			for (i = 0; i < thisline; i++)
471	matthewc	169	printf("%02x ", line[i]);
472	matty	10
473	matty	30	for (; i < 16; i++)
474	matthewc	169	printf(" ");
475	matty	30
476	matty	10	for (i = 0; i < thisline; i++)
477	matthewc	169	printf("%c", (line[i] >= 0x20 && line[i] < 0x7f) ? line[i] : '.');
478	matty	10
479	matthewc	169	printf("\n");
480	matty	10	offset += thisline;
481			line += thisline;
482			}
483			}
484	matthewc	39
485	matthewc	159	#ifdef SAVE_LICENCE
486	matthewc	39	int
487			load_licence(unsigned char **data)
488			{
489			char path[PATH_MAX];
490			char *home;
491			struct stat st;
492			int fd;
493
494			home = getenv("HOME");
495			if (home == NULL)
496			return -1;
497
498			STRNCPY(path, home, sizeof(path));
499	astrand	64	strncat(path, "/.rdesktop/licence", sizeof(path) - strlen(path) - 1);
500	matthewc	39
501			fd = open(path, O_RDONLY);
502			if (fd == -1)
503			return -1;
504
505			if (fstat(fd, &st))
506			return -1;
507
508			*data = xmalloc(st.st_size);
509			return read(fd, *data, st.st_size);
510			}
511
512			void
513			save_licence(unsigned char *data, int length)
514			{
515			char path[PATH_MAX];
516			char *home;
517			int fd;
518
519			home = getenv("HOME");
520			if (home == NULL)
521			return;
522
523			STRNCPY(path, home, sizeof(path));
524	astrand	64	strncat(path, "/.rdesktop", sizeof(path) - strlen(path) - 1);
525	matthewc	39	mkdir(path, 0700);
526
527	astrand	64	strncat(path, "/licence", sizeof(path) - strlen(path) - 1);
528	matthewc	39
529	astrand	64	fd = open(path, O_WRONLY \| O_CREAT \| O_TRUNC, 0600);
530	matthewc	39	if (fd == -1)
531			{
532			perror("open");
533			return;
534			}
535
536			write(fd, data, length);
537			close(fd);
538			}
539	matthewc	159	#endif