* called by a name other than "ssh" or "Secure Shell".
*
* Copyright (c) 1999 Niels Provos. All rights reserved.
- * Copyright (c) 2000, 2001, 2002 Markus Friedl. All rights reserved.
+ * Copyright (c) 2000, 2001, 2002, 2003 Markus Friedl. All rights reserved.
*
* Modified to work with SSL by Niels Provos <provos@citi.umich.edu>
* in Canada (German citizen).
*/
#include "includes.h"
-RCSID("$OpenBSD: ssh.c,v 1.192 2003/05/11 20:30:25 markus Exp $");
+RCSID("$OpenBSD: ssh.c,v 1.212 2004/04/27 09:46:37 djm Exp $");
#include <openssl/evp.h>
#include <openssl/err.h>
#include "kex.h"
#include "mac.h"
#include "sshtty.h"
+#include "match.h"
#ifdef SMARTCARD
#include "scard.h"
char *__progname;
#endif
-/* Flag indicating whether IPv4 or IPv6. This can be set on the command line.
- Default value is AF_UNSPEC means both IPv4 and IPv6. */
-#ifdef IPV4_DEFAULT
-int IPv4or6 = AF_INET;
-#else
-int IPv4or6 = AF_UNSPEC;
-#endif
-
/* Flag indicating whether debug mode is on. This can be set on the command line. */
int debug_flag = 0;
static void
usage(void)
{
- fprintf(stderr, "Usage: %s [options] host [command]\n", __progname);
- fprintf(stderr, "Options:\n");
- fprintf(stderr, " -l user Log in using this user name.\n");
- fprintf(stderr, " -n Redirect input from " _PATH_DEVNULL ".\n");
- fprintf(stderr, " -F config Config file (default: ~/%s).\n",
- _PATH_SSH_USER_CONFFILE);
- fprintf(stderr, " -A Enable authentication agent forwarding.\n");
- fprintf(stderr, " -a Disable authentication agent forwarding (default).\n");
-#ifdef AFS
- fprintf(stderr, " -k Disable Kerberos ticket and AFS token forwarding.\n");
-#endif /* AFS */
- fprintf(stderr, " -X Enable X11 connection forwarding.\n");
- fprintf(stderr, " -x Disable X11 connection forwarding (default).\n");
- fprintf(stderr, " -i file Identity for public key authentication "
- "(default: ~/.ssh/identity)\n");
-#ifdef SMARTCARD
- fprintf(stderr, " -I reader Set smartcard reader.\n");
-#endif
- fprintf(stderr, " -t Tty; allocate a tty even if command is given.\n");
- fprintf(stderr, " -T Do not allocate a tty.\n");
- fprintf(stderr, " -v Verbose; display verbose debugging messages.\n");
- fprintf(stderr, " Multiple -v increases verbosity.\n");
- fprintf(stderr, " -V Display version number only.\n");
- fprintf(stderr, " -q Quiet; don't display any warning messages.\n");
- fprintf(stderr, " -f Fork into background after authentication.\n");
- fprintf(stderr, " -e char Set escape character; ``none'' = disable (default: ~).\n");
-
- fprintf(stderr, " -c cipher Select encryption algorithm\n");
- fprintf(stderr, " -m macs Specify MAC algorithms for protocol version 2.\n");
- fprintf(stderr, " -p port Connect to this port. Server must be on the same port.\n");
- fprintf(stderr, " -L listen-port:host:port Forward local port to remote address\n");
- fprintf(stderr, " -R listen-port:host:port Forward remote port to local address\n");
- fprintf(stderr, " These cause %s to listen for connections on a port, and\n", __progname);
- fprintf(stderr, " forward them to the other side by connecting to host:port.\n");
- fprintf(stderr, " -D port Enable dynamic application-level port forwarding.\n");
- fprintf(stderr, " -C Enable compression.\n");
- fprintf(stderr, " -N Do not execute a shell or command.\n");
- fprintf(stderr, " -g Allow remote hosts to connect to forwarded ports.\n");
- fprintf(stderr, " -1 Force protocol version 1.\n");
- fprintf(stderr, " -2 Force protocol version 2.\n");
- fprintf(stderr, " -4 Use IPv4 only.\n");
- fprintf(stderr, " -6 Use IPv6 only.\n");
- fprintf(stderr, " -o 'option' Process the option as if it was read from a configuration file.\n");
- fprintf(stderr, " -s Invoke command (mandatory) as SSH2 subsystem.\n");
- fprintf(stderr, " -b addr Local IP address.\n");
+ fprintf(stderr,
+"usage: ssh [-1246AaCfghkNnqsTtVvXxY] [-b bind_address] [-c cipher_spec]\n"
+" [-D port] [-e escape_char] [-F configfile] [-i identity_file]\n"
+" [-L port:host:hostport] [-l login_name] [-m mac_spec] [-o option]\n"
+" [-p port] [-R port:host:hostport] [user@]hostname [command]\n"
+ );
exit(1);
}
int i, opt, exit_status;
u_short fwd_port, fwd_host_port;
char sfwd_port[6], sfwd_host_port[6];
- char *p, *cp, buf[256];
+ char *p, *cp, *line, buf[256];
struct stat st;
struct passwd *pw;
int dummy;
extern int optind, optreset;
extern char *optarg;
- __progname = get_progname(av[0]);
+ __progname = ssh_get_progname(av[0]);
init_rng();
/*
*/
original_real_uid = getuid();
original_effective_uid = geteuid();
-
+
/*
* Use uid-swapping to give up root privileges for the duration of
* option processing. We will re-instantiate the rights when we are
again:
while ((opt = getopt(ac, av,
- "1246ab:c:e:fgi:kl:m:no:p:qstvxACD:F:I:L:NPR:TVX")) != -1) {
+ "1246ab:c:e:fgi:kl:m:no:p:qstvxACD:F:I:L:NPR:TVXY")) != -1) {
switch (opt) {
case '1':
options.protocol = SSH_PROTO_1;
options.protocol = SSH_PROTO_2;
break;
case '4':
- IPv4or6 = AF_INET;
+ options.address_family = AF_INET;
break;
case '6':
- IPv4or6 = AF_INET6;
+ options.address_family = AF_INET6;
break;
case 'n':
stdin_null_flag = 1;
case 'X':
options.forward_x11 = 1;
break;
+ case 'Y':
+ options.forward_x11 = 1;
+ options.forward_x11_trusted = 1;
+ break;
case 'g':
options.gateway_ports = 1;
break;
case 'A':
options.forward_agent = 1;
break;
-#ifdef AFS
case 'k':
- options.kerberos_tgt_passing = 0;
- options.afs_token_passing = 0;
+ options.gss_deleg_creds = 0;
break;
-#endif
case 'i':
if (stat(optarg, &st) < 0) {
fprintf(stderr, "Warning: Identity file %s "
tty_flag = 1;
break;
case 'v':
- if (0 == debug_flag) {
+ if (debug_flag == 0) {
debug_flag = 1;
options.log_level = SYSLOG_LEVEL_DEBUG1;
- } else if (options.log_level < SYSLOG_LEVEL_DEBUG3) {
- options.log_level++;
+ } else {
+ if (options.log_level < SYSLOG_LEVEL_DEBUG3)
+ options.log_level++;
break;
- } else
- fatal("Too high debugging level.");
+ }
/* fallthrough */
case 'V':
- fprintf(stderr,
- "%s, SSH protocols %d.%d/%d.%d, OpenSSL 0x%8.8lx\n",
- SSH_VERSION,
- PROTOCOL_MAJOR_1, PROTOCOL_MINOR_1,
- PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2,
- SSLeay());
+ fprintf(stderr, "%s, %s\n",
+ SSH_VERSION, SSLeay_version(SSLEAY_VERSION));
if (opt == 'V')
exit(0);
break;
optarg);
exit(1);
}
- add_local_forward(&options, fwd_port, "socks4", 0);
+ add_local_forward(&options, fwd_port, "socks", 0);
break;
case 'C':
break;
case 'o':
dummy = 1;
+ line = xstrdup(optarg);
if (process_config_line(&options, host ? host : "",
- optarg, "command-line", 0, &dummy) != 0)
+ line, "command-line", 0, &dummy) != 0)
exit(1);
+ xfree(line);
break;
case 's':
subsystem_flag = 1;
SSLeay_add_all_algorithms();
ERR_load_crypto_strings();
- channel_set_af(IPv4or6);
/* Initialize the command to execute on remote host. */
buffer_init(&command);
* file if the user specifies a config file on the command line.
*/
if (config != NULL) {
- if (!read_config_file(config, host, &options))
+ if (!read_config_file(config, host, &options, 0))
fatal("Can't open user config file %.100s: "
"%.100s", config, strerror(errno));
} else {
snprintf(buf, sizeof buf, "%.100s/%.100s", pw->pw_dir,
_PATH_SSH_USER_CONFFILE);
- (void)read_config_file(buf, host, &options);
+ (void)read_config_file(buf, host, &options, 1);
/* Read systemwide configuration file after use config. */
- (void)read_config_file(_PATH_HOST_CONFIG_FILE, host, &options);
+ (void)read_config_file(_PATH_HOST_CONFIG_FILE, host,
+ &options, 0);
}
/* Fill configuration defaults. */
fill_default_options(&options);
+ channel_set_af(options.address_family);
+
/* reinit */
log_init(av[0], options.log_level, SYSLOG_FACILITY_USER, 1);
if (options.hostname != NULL)
host = options.hostname;
+ /* force lowercase for hostkey matching */
+ if (options.host_key_alias != NULL) {
+ for (p = options.host_key_alias; *p; p++)
+ if (isupper(*p))
+ *p = tolower(*p);
+ }
+
if (options.proxy_command != NULL &&
strcmp(options.proxy_command, "none") == 0)
options.proxy_command = NULL;
- /* Disable rhosts authentication if not running as root. */
-#ifdef HAVE_CYGWIN
- /* Ignore uid if running under Windows */
- if (!options.use_privileged_port) {
-#else
- if (original_effective_uid != 0 || !options.use_privileged_port) {
-#endif
- debug("Rhosts Authentication disabled, "
- "originating port will not be trusted.");
- options.rhosts_authentication = 0;
- }
/* Open a connection to the remote host. */
-
- if (ssh_connect(host, &hostaddr, options.port, IPv4or6,
- options.connection_attempts,
+ if (ssh_connect(host, &hostaddr, options.port,
+ options.address_family, options.connection_attempts,
#ifdef HAVE_CYGWIN
options.use_privileged_port,
#else
packet_close();
/*
- * Send SIGHUP to proxy command if used. We don't wait() in
+ * Send SIGHUP to proxy command if used. We don't wait() in
* case it hangs and instead rely on init to reap the child
*/
if (proxy_command_pid > 1)
return exit_status;
}
+#define SSH_X11_PROTO "MIT-MAGIC-COOKIE-1"
+
static void
x11_get_proto(char **_proto, char **_data)
{
+ char cmd[1024];
char line[512];
+ char xdisplay[512];
static char proto[512], data[512];
FILE *f;
- int got_data = 0, i;
- char *display;
+ int got_data = 0, generated = 0, do_unlink = 0, i;
+ char *display, *xauthdir, *xauthfile;
struct stat st;
+ xauthdir = xauthfile = NULL;
*_proto = proto;
*_data = data;
proto[0] = data[0] = '\0';
+
if (!options.xauth_location ||
(stat(options.xauth_location, &st) == -1)) {
debug("No xauth program.");
debug("x11_get_proto: DISPLAY not set");
return;
}
- /* Try to get Xauthority information for the display. */
- if (strncmp(display, "localhost:", 10) == 0)
- /*
- * Handle FamilyLocal case where $DISPLAY does
- * not match an authorization entry. For this we
- * just try "xauth list unix:displaynum.screennum".
- * XXX: "localhost" match to determine FamilyLocal
- * is not perfect.
- */
- snprintf(line, sizeof line, "%s list unix:%s 2>"
- _PATH_DEVNULL, options.xauth_location, display+10);
- else
- snprintf(line, sizeof line, "%s list %.200s 2>"
- _PATH_DEVNULL, options.xauth_location, display);
- debug2("x11_get_proto: %s", line);
- f = popen(line, "r");
+ /*
+ * Handle FamilyLocal case where $DISPLAY does
+ * not match an authorization entry. For this we
+ * just try "xauth list unix:displaynum.screennum".
+ * XXX: "localhost" match to determine FamilyLocal
+ * is not perfect.
+ */
+ if (strncmp(display, "localhost:", 10) == 0) {
+ snprintf(xdisplay, sizeof(xdisplay), "unix:%s",
+ display + 10);
+ display = xdisplay;
+ }
+ if (options.forward_x11_trusted == 0) {
+ xauthdir = xmalloc(MAXPATHLEN);
+ xauthfile = xmalloc(MAXPATHLEN);
+ strlcpy(xauthdir, "/tmp/ssh-XXXXXXXXXX", MAXPATHLEN);
+ if (mkdtemp(xauthdir) != NULL) {
+ do_unlink = 1;
+ snprintf(xauthfile, MAXPATHLEN, "%s/xauthfile",
+ xauthdir);
+ snprintf(cmd, sizeof(cmd),
+ "%s -f %s generate %s " SSH_X11_PROTO
+ " untrusted timeout 1200 2>" _PATH_DEVNULL,
+ options.xauth_location, xauthfile, display);
+ debug2("x11_get_proto: %s", cmd);
+ if (system(cmd) == 0)
+ generated = 1;
+ }
+ }
+ snprintf(cmd, sizeof(cmd),
+ "%s %s%s list %s . 2>" _PATH_DEVNULL,
+ options.xauth_location,
+ generated ? "-f " : "" ,
+ generated ? xauthfile : "",
+ display);
+ debug2("x11_get_proto: %s", cmd);
+ f = popen(cmd, "r");
if (f && fgets(line, sizeof(line), f) &&
sscanf(line, "%*s %511s %511s", proto, data) == 2)
got_data = 1;
if (f)
pclose(f);
}
+
+ if (do_unlink) {
+ unlink(xauthfile);
+ rmdir(xauthdir);
+ }
+ if (xauthdir)
+ xfree(xauthdir);
+ if (xauthfile)
+ xfree(xauthfile);
+
/*
* If we didn't get authentication data, just make up some
* data. The forwarding code will check the validity of the
if (!got_data) {
u_int32_t rand = 0;
- logit("Warning: No xauth data; using fake authentication data for X11 forwarding.");
- strlcpy(proto, "MIT-MAGIC-COOKIE-1", sizeof proto);
+ logit("Warning: No xauth data; "
+ "using fake authentication data for X11 forwarding.");
+ strlcpy(proto, SSH_X11_PROTO, sizeof proto);
for (i = 0; i < 16; i++) {
if (i % 4 == 0)
rand = arc4random();
- snprintf(data + 2 * i, sizeof data - 2 * i, "%02x", rand & 0xff);
+ snprintf(data + 2 * i, sizeof data - 2 * i, "%02x",
+ rand & 0xff);
rand >>= 8;
}
}
}
void
-client_global_request_reply(int type, u_int32_t seq, void *ctxt)
+client_global_request_reply_fwd(int type, u_int32_t seq, void *ctxt)
{
int i;
i = client_global_request_id++;
- if (i >= options.num_remote_forwards) {
- debug("client_global_request_reply: too many replies %d > %d",
- i, options.num_remote_forwards);
+ if (i >= options.num_remote_forwards)
return;
- }
debug("remote forward %s for: listen %d, connect %s:%d",
type == SSH2_MSG_REQUEST_SUCCESS ? "success" : "failure",
options.remote_forwards[i].port,
packet_send();
}
+ /* Transfer any environment variables from client to server */
+ if (options.num_send_env != 0) {
+ int i, j, matched;
+ extern char **environ;
+ char *name, *val;
+
+ debug("Sending environment.");
+ for (i = 0; environ && environ[i] != NULL; i++) {
+ /* Split */
+ name = xstrdup(environ[i]);
+ if ((val = strchr(name, '=')) == NULL) {
+ free(name);
+ continue;
+ }
+ *val++ = '\0';
+
+ matched = 0;
+ for (j = 0; j < options.num_send_env; j++) {
+ if (match_pattern(name, options.send_env[j])) {
+ matched = 1;
+ break;
+ }
+ }
+ if (!matched) {
+ debug3("Ignored env %s", name);
+ free(name);
+ continue;
+ }
+
+ debug("Sending env %s = %s", name, val);
+ channel_request_start(id, "env", 0);
+ packet_put_cstring(name);
+ packet_put_cstring(val);
+ packet_send();
+ free(name);
+ }
+ }
+
len = buffer_len(&command);
if (len > 0) {
if (len > 900)
sizeof(Key *) * (SSH_MAX_IDENTITY_FILES - 1));
options.num_identity_files++;
options.identity_keys[0] = keys[i];
- options.identity_files[0] = xstrdup("smartcard key");;
+ options.identity_files[0] = sc_get_key_label(keys[i]);
}
if (options.num_identity_files > SSH_MAX_IDENTITY_FILES)
options.num_identity_files = SSH_MAX_IDENTITY_FILES;
andersk / openssh.git / blobdiff