- (djm) Merge OpenBSD changes:
- markus@cvs.openbsd.org 2000/11/06 16:04:56
[channels.c channels.h clientloop.c nchan.c serverloop.c]
[session.c ssh.c]
agent forwarding and -R for ssh2, based on work from
jhuuskon@messi.uku.fi
- markus@cvs.openbsd.org 2000/11/06 16:13:27
[ssh.c sshconnect.c sshd.c]
do not disabled rhosts(rsa) if server port > 1024; from
pekkas@netcore.fi
- markus@cvs.openbsd.org 2000/11/06 16:16:35
[sshconnect.c]
downgrade client to 1.3 if server is 1.4; help from mdb@juniper.net
- markus@cvs.openbsd.org 2000/11/09 18:04:40
[auth1.c]
typo; from mouring@pconline.com
- markus@cvs.openbsd.org 2000/11/12 12:03:28
[ssh-agent.c]
off-by-one when removing a key from the agent
- markus@cvs.openbsd.org 2000/11/12 12:50:39
[auth-rh-rsa.c auth2.c authfd.c authfd.h]
[authfile.c hostfile.c kex.c kex.h key.c key.h myproposal.h]
[readconf.c readconf.h rsa.c rsa.h servconf.c servconf.h ssh-add.c]
[ssh-agent.c ssh-keygen.1 ssh-keygen.c ssh.1 ssh.c ssh_config]
[sshconnect1.c sshconnect2.c sshd.8 sshd.c sshd_config ssh-dss.c]
[ssh-dss.h ssh-rsa.c ssh-rsa.h dsa.c dsa.h]
add support for RSA to SSH2. please test.
there are now 3 types of keys: RSA1 is used by ssh-1 only,
RSA and DSA are used by SSH2.
you can use 'ssh-keygen -t rsa -f ssh2_rsa_file' to generate RSA
keys for SSH2 and use the RSA keys for hostkeys or for user keys.
SSH2 RSA or DSA keys are added to .ssh/authorised_keys2 as before.
- (djm) Fix up Makefile and Redhat init script to create RSA host keys
- (djm) Change to interim version
diff --git a/clientloop.c b/clientloop.c
index bccb9be..8f16d2f 100644
--- a/clientloop.c
+++ b/clientloop.c
@@ -59,7 +59,7 @@
*/
#include "includes.h"
-RCSID("$OpenBSD: clientloop.c,v 1.39 2000/10/27 07:48:22 markus Exp $");
+RCSID("$OpenBSD: clientloop.c,v 1.40 2000/11/06 23:04:56 markus Exp $");
#include "xmalloc.h"
#include "ssh.h"
@@ -75,6 +75,10 @@
#include "buffer.h"
#include "bufaux.h"
+#include <openssl/dsa.h>
+#include <openssl/rsa.h>
+#include "key.h"
+#include "authfd.h"
/* import options */
extern Options options;
@@ -1016,13 +1020,99 @@
quit_pending = 1;
}
+Channel *
+client_request_forwarded_tcpip(const char *request_type, int rchan)
+{
+ Channel* c = NULL;
+ char *listen_address, *originator_address;
+ int listen_port, originator_port;
+ int sock, newch;
+
+ /* Get rest of the packet */
+ listen_address = packet_get_string(NULL);
+ listen_port = packet_get_int();
+ originator_address = packet_get_string(NULL);
+ originator_port = packet_get_int();
+ packet_done();
+
+ debug("client_request_forwarded_tcpip: listen %s port %d, originator %s port %d",
+ listen_address, listen_port, originator_address, originator_port);
+
+ sock = channel_connect_by_listen_adress(listen_port);
+ if (sock >= 0) {
+ newch = channel_new("forwarded-tcpip",
+ SSH_CHANNEL_OPEN, sock, sock, -1,
+ CHAN_TCP_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
+ xstrdup(originator_address), 1);
+ c = channel_lookup(newch);
+ }
+ xfree(originator_address);
+ xfree(listen_address);
+ return c;
+}
+
+Channel*
+client_request_x11(const char *request_type, int rchan)
+{
+ Channel *c = NULL;
+ char *originator;
+ int originator_port;
+ int sock, newch;
+
+ if (!options.forward_x11) {
+ error("Warning: ssh server tried X11 forwarding.");
+ error("Warning: this is probably a break in attempt by a malicious server.");
+ return NULL;
+ }
+ originator = packet_get_string(NULL);
+ if (datafellows & SSH_BUG_X11FWD) {
+ debug2("buggy server: x11 request w/o originator_port");
+ originator_port = 0;
+ } else {
+ originator_port = packet_get_int();
+ }
+ packet_done();
+ /* XXX check permission */
+ sock = x11_connect_display();
+ if (sock >= 0) {
+ newch = channel_new("x11",
+ SSH_CHANNEL_X11_OPEN, sock, sock, -1,
+ CHAN_TCP_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, 0,
+ xstrdup("x11"), 1);
+ c = channel_lookup(newch);
+ }
+ xfree(originator);
+ return c;
+}
+
+Channel*
+client_request_agent(const char *request_type, int rchan)
+{
+ Channel *c = NULL;
+ int sock, newch;
+
+ if (!options.forward_agent) {
+ error("Warning: ssh server tried agent forwarding.");
+ error("Warning: this is probably a break in attempt by a malicious server.");
+ return NULL;
+ }
+ sock = ssh_get_authentication_socket();
+ if (sock >= 0) {
+ newch = channel_new("authentication agent connection",
+ SSH_CHANNEL_OPEN, sock, sock, -1,
+ CHAN_X11_WINDOW_DEFAULT, CHAN_TCP_WINDOW_DEFAULT, 0,
+ xstrdup("authentication agent connection"), 1);
+ c = channel_lookup(newch);
+ }
+ return c;
+}
+
/* XXXX move to generic input handler */
void
client_input_channel_open(int type, int plen, void *ctxt)
{
Channel *c = NULL;
char *ctype;
- int id;
unsigned int len;
int rchan;
int rmaxpack;
@@ -1036,28 +1126,12 @@
debug("client_input_channel_open: ctype %s rchan %d win %d max %d",
ctype, rchan, rwindow, rmaxpack);
- if (strcmp(ctype, "x11") == 0 && options.forward_x11) {
- int sock;
- char *originator;
- int originator_port;
- originator = packet_get_string(NULL);
- if (datafellows & SSH_BUG_X11FWD) {
- debug2("buggy server: x11 request w/o originator_port");
- originator_port = 0;
- } else {
- originator_port = packet_get_int();
- }
- packet_done();
- /* XXX check permission */
- xfree(originator);
- /* XXX move to channels.c */
- sock = x11_connect_display();
- if (sock >= 0) {
- id = channel_new("x11", SSH_CHANNEL_X11_OPEN,
- sock, sock, -1, CHAN_X11_WINDOW_DEFAULT,
- CHAN_X11_PACKET_DEFAULT, 0, xstrdup("x11"), 1);
- c = channel_lookup(id);
- }
+ if (strcmp(ctype, "forwarded-tcpip") == 0) {
+ c = client_request_forwarded_tcpip(ctype, rchan);
+ } else if (strcmp(ctype, "x11") == 0) {
+ c = client_request_x11(ctype, rchan);
+ } else if (strcmp(ctype, "auth-agent@openssh.com") == 0) {
+ c = client_request_agent(ctype, rchan);
}
/* XXX duplicate : */
if (c != NULL) {