*/
#include "includes.h"
-RCSID("$Id$");
+RCSID("$OpenBSD: ssh.c,v 1.56 2000/06/20 01:39:44 markus Exp $");
#include <openssl/evp.h>
#include <openssl/dsa.h>
#ifdef HAVE___PROGNAME
extern char *__progname;
#else /* HAVE___PROGNAME */
-const char *__progname = "ssh";
+static const char *__progname = "ssh";
#endif /* HAVE___PROGNAME */
/* Flag indicating whether IPv4 or IPv6. This can be set on the command line.
fprintf(stderr, "Options:\n");
fprintf(stderr, " -l user Log in using this user name.\n");
fprintf(stderr, " -n Redirect input from /dev/null.\n");
+ fprintf(stderr, " -A Enable authentication agent forwarding.\n");
fprintf(stderr, " -a Disable authentication agent forwarding.\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.\n");
fprintf(stderr, " -i file Identity for RSA authentication (default: ~/.ssh/identity).\n");
fprintf(stderr, " -t Tty; allocate a tty even if command is given.\n");
case 'a':
options.forward_agent = 0;
break;
+ case 'A':
+ options.forward_agent = 1;
+ break;
#ifdef AFS
case 'k':
options.kerberos_tgt_passing = 0;
if (ciphers_valid(optarg)) {
/* SSH2 only */
options.ciphers = xstrdup(optarg);
+ options.cipher = SSH_CIPHER_ILLEGAL;
} else {
/* SSH1 only */
options.cipher = cipher_number(optarg);
/* Initialize the command to execute on remote host. */
buffer_init(&command);
- OpenSSL_add_all_algorithms();
-
+ SSLeay_add_all_algorithms();
+
/*
* Save the command to execute on the remote host in a buffer. There
* is no limit on the length of the command, except by the maximum
return exit_status;
}
+void
+x11_get_proto(char *proto, int proto_len, char *data, int data_len)
+{
+ char line[512];
+ FILE *f;
+ int got_data = 0, i;
+
+ if (options.xauth_location) {
+ /* Try to get Xauthority information for the display. */
+ snprintf(line, sizeof line, "%.100s list %.200s 2>/dev/null",
+ options.xauth_location, getenv("DISPLAY"));
+ f = popen(line, "r");
+ if (f && fgets(line, sizeof(line), f) &&
+ sscanf(line, "%*s %s %s", proto, data) == 2)
+ got_data = 1;
+ if (f)
+ pclose(f);
+ }
+ /*
+ * If we didn't get authentication data, just make up some
+ * data. The forwarding code will check the validity of the
+ * response anyway, and substitute this data. The X11
+ * server, however, will ignore this fake data and use
+ * whatever authentication mechanisms it was using otherwise
+ * for the local connection.
+ */
+ if (!got_data) {
+ u_int32_t rand = 0;
+
+ strlcpy(proto, "MIT-MAGIC-COOKIE-1", proto_len);
+ for (i = 0; i < 16; i++) {
+ if (i % 4 == 0)
+ rand = arc4random();
+ snprintf(data + 2 * i, data_len - 2 * i, "%02x", rand & 0xff);
+ rand >>= 8;
+ }
+ }
+}
+
int
ssh_session(void)
{
}
/* Request X11 forwarding if enabled and DISPLAY is set. */
if (options.forward_x11 && getenv("DISPLAY") != NULL) {
- char line[512], proto[512], data[512];
- FILE *f;
- int forwarded = 0, got_data = 0, i;
-
-#ifdef XAUTH_PATH
- /* Try to get Xauthority information for the display. */
- snprintf(line, sizeof line, "%.100s list %.200s 2>/dev/null",
- XAUTH_PATH, getenv("DISPLAY"));
- f = popen(line, "r");
- if (f && fgets(line, sizeof(line), f) &&
- sscanf(line, "%*s %s %s", proto, data) == 2)
- got_data = 1;
- if (f)
- pclose(f);
-#endif /* XAUTH_PATH */
- /*
- * If we didn't get authentication data, just make up some
- * data. The forwarding code will check the validity of the
- * response anyway, and substitute this data. The X11
- * server, however, will ignore this fake data and use
- * whatever authentication mechanisms it was using otherwise
- * for the local connection.
- */
- if (!got_data) {
- u_int32_t rand = 0;
-
- strlcpy(proto, "MIT-MAGIC-COOKIE-1", 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);
- rand >>= 8;
- }
- }
- /*
- * Got local authentication reasonable information. Request
- * forwarding with authentication spoofing.
- */
+ char proto[512], data[512];
+ /* Get reasonable local authentication information. */
+ x11_get_proto(proto, sizeof proto, data, sizeof data);
+ /* Request forwarding with authentication spoofing. */
debug("Requesting X11 forwarding with authentication spoofing.");
- x11_request_forwarding_with_spoofing(proto, data);
+ x11_request_forwarding_with_spoofing(0, proto, data);
/* Read response from the server. */
type = packet_read(&plen);
if (type == SSH_SMSG_SUCCESS) {
- forwarded = 1;
interactive = 1;
- } else if (type == SSH_SMSG_FAILURE)
+ } else if (type == SSH_SMSG_FAILURE) {
log("Warning: Remote host denied X11 forwarding.");
- else
+ } else {
packet_disconnect("Protocol error waiting for X11 forwarding");
+ }
}
/* Tell the packet module whether this is an interactive session. */
packet_set_interactive(interactive, options.keepalives);
packet_send();
/* XXX wait for reply */
}
+ if (options.forward_x11 &&
+ getenv("DISPLAY") != NULL) {
+ char proto[512], data[512];
+ /* Get reasonable local authentication information. */
+ x11_get_proto(proto, sizeof proto, data, sizeof data);
+ /* Request forwarding with authentication spoofing. */
+ debug("Requesting X11 forwarding with authentication spoofing.");
+ x11_request_forwarding_with_spoofing(id, proto, data);
+ /* XXX wait for reply */
+ }
+
len = buffer_len(&command);
if (len > 0) {
if (len > 900)
andersk / openssh.git / blobdiff