static void ssh2_pkt_addmp(Ssh, Bignum b);
static int ssh2_pkt_construct(Ssh);
static void ssh2_pkt_send(Ssh);
+static int do_ssh1_login(Ssh ssh, unsigned char *in, int inlen, int ispkt);
+static void do_ssh2_authconn(Ssh ssh, unsigned char *in, int inlen, int ispkt);
/*
* Buffer management constants. There are several of these for
static void ssh_throttle_all(Ssh ssh, int enable, int bufsize);
static void ssh2_set_window(struct ssh_channel *c, unsigned newwin);
static int ssh_sendbuffer(void *handle);
+static void ssh_do_close(Ssh ssh);
struct rdpkt1_state_tag {
long len, pad, biglen, to_read;
* potentially reconfigure port forwardings etc in mid-session.
*/
Config cfg;
+
+ /*
+ * Used to transfer data back from async agent callbacks.
+ */
+ void *agent_response;
+ int agent_response_len;
};
#define logevent(s) logevent(ssh->frontend, s)
sfree(buf);
}
-#define bombout(msg) ( ssh->state = SSH_STATE_CLOSED, \
- (ssh->s ? sk_close(ssh->s), ssh->s = NULL : 0), \
- logeventf msg, connection_fatal msg )
+#define bombout(msg) \
+ do { \
+ char *text = dupprintf msg; \
+ ssh_do_close(ssh); \
+ logevent(text); \
+ connection_fatal(ssh->frontend, "%s", text); \
+ sfree(text); \
+ } while (0)
static int ssh_channelcmp(void *av, void *bv)
{
if (ssh->cipher && detect_attack(ssh->crcda_ctx, ssh->pktin.data,
st->biglen, NULL)) {
- bombout((ssh,"Network attack (CRC compensation) detected!"));
- crReturn(0);
+ bombout(("Network attack (CRC compensation) detected!"));
+ crStop(0);
}
if (ssh->cipher)
st->realcrc = crc32(ssh->pktin.data, st->biglen - 4);
st->gotcrc = GET_32BIT(ssh->pktin.data + st->biglen - 4);
if (st->gotcrc != st->realcrc) {
- bombout((ssh,"Incorrect CRC received on packet"));
- crReturn(0);
+ bombout(("Incorrect CRC received on packet"));
+ crStop(0);
}
ssh->pktin.body = ssh->pktin.data + st->pad + 1;
ssh->pktin.type == SSH1_SMSG_AUTH_CCARD_CHALLENGE) {
long stringlen = GET_32BIT(ssh->pktin.body);
if (stringlen + 4 != ssh->pktin.length) {
- bombout((ssh,"Received data packet with bogus string length"));
- crReturn(0);
+ bombout(("Received data packet with bogus string length"));
+ crStop(0);
}
}
memcpy(buf + nowlen, ssh->pktin.body + 4, msglen);
buf[nowlen + msglen] = '\0';
/* logevent(buf); (this is now done within the bombout macro) */
- bombout((ssh,"Server sent disconnect message:\n\"%s\"", buf+nowlen));
- crReturn(0);
+ bombout(("Server sent disconnect message:\n\"%s\"", buf+nowlen));
+ crStop(0);
}
crFinish(0);
* do us any more damage.
*/
if (st->len < 0 || st->pad < 0 || st->len + st->pad < 0) {
- bombout((ssh,"Incoming packet was garbled on decryption"));
- crReturn(0);
+ bombout(("Incoming packet was garbled on decryption"));
+ crStop(0);
}
/*
if (ssh->scmac
&& !ssh->scmac->verify(ssh->sc_mac_ctx, ssh->pktin.data, st->len + 4,
st->incoming_sequence)) {
- bombout((ssh,"Incorrect MAC received on packet"));
- crReturn(0);
+ bombout(("Incorrect MAC received on packet"));
+ crStop(0);
}
st->incoming_sequence++; /* whether or not we MACed */
buf = dupprintf("Disconnection message text: %n%.*s",
&nowlen, msglen, ssh->pktin.data + 14);
logevent(buf);
- bombout((ssh,"Server sent disconnect message\ntype %d (%s):\n\"%s\"",
+ bombout(("Server sent disconnect message\ntype %d (%s):\n\"%s\"",
reason,
(reason > 0 && reason < lenof(ssh2_disconnect_reasons)) ?
ssh2_disconnect_reasons[reason] : "unknown",
buf+nowlen));
sfree(buf);
- crReturn(0);
+ crStop(0);
}
break;
case SSH2_MSG_IGNORE:
if (!p)
return NULL;
if (p[0] & 0x80) {
- bombout((ssh,"internal error: Can't handle negative mpints"));
+ bombout(("internal error: Can't handle negative mpints"));
return NULL;
}
b = bignum_from_bytes((unsigned char *)p, length);
s->proto2 = ssh_versioncmp(s->version, "1.99") >= 0;
if (ssh->cfg.sshprot == 0 && !s->proto1) {
- bombout((ssh,"SSH protocol version 1 required by user but not provided by server"));
- crReturn(0);
+ bombout(("SSH protocol version 1 required by user but not provided by server"));
+ crStop(0);
}
if (ssh->cfg.sshprot == 3 && !s->proto2) {
- bombout((ssh,"SSH protocol version 2 required by user but not provided by server"));
- crReturn(0);
+ bombout(("SSH protocol version 2 required by user but not provided by server"));
+ crStop(0);
}
if (s->proto2 && (ssh->cfg.sshprot >= 2 || !s->proto1)) {
ssh->version = 1;
ssh->s_rdpkt = ssh1_rdpkt;
}
+ update_specials_menu(ssh->frontend);
ssh->state = SSH_STATE_BEFORE_SIZE;
sfree(s->vstring);
crFinishV;
}
-static int ssh_closing(Plug plug, char *error_msg, int error_code,
- int calling_back)
+static void ssh_do_close(Ssh ssh)
{
- Ssh ssh = (Ssh) plug;
+ int i;
+ struct ssh_channel *c;
+
ssh->state = SSH_STATE_CLOSED;
if (ssh->s) {
sk_close(ssh->s);
ssh->s = NULL;
}
+ /*
+ * Now we must shut down any port and X forwardings going
+ * through this connection.
+ */
+ if (ssh->channels) {
+ for (i = 0; NULL != (c = index234(ssh->channels, i)); i++) {
+ switch (c->type) {
+ case CHAN_X11:
+ x11_close(c->u.x11.s);
+ break;
+ case CHAN_SOCKDATA:
+ pfd_close(c->u.pfd.s);
+ break;
+ }
+ del234(ssh->channels, c);
+ if (ssh->version == 2)
+ bufchain_clear(&c->v.v2.outbuffer);
+ sfree(c);
+ }
+ }
+}
+
+static int ssh_closing(Plug plug, char *error_msg, int error_code,
+ int calling_back)
+{
+ Ssh ssh = (Ssh) plug;
+ ssh_do_close(ssh);
if (error_msg) {
/* A socket error has occurred. */
logevent(error_msg);
- connection_fatal(ssh->frontend, error_msg);
+ connection_fatal(ssh->frontend, "%s", error_msg);
} else {
/* Otherwise, the remote side closed the connection normally. */
}
Ssh ssh = (Ssh) plug;
ssh_gotdata(ssh, (unsigned char *)data, len);
if (ssh->state == SSH_STATE_CLOSED) {
- if (ssh->s) {
- sk_close(ssh->s);
- ssh->s = NULL;
- }
+ ssh_do_close(ssh);
return 0;
}
return 1;
/* Agent channels require no buffer management. */
break;
case CHAN_SOCKDATA:
- pfd_override_throttle(c->u.x11.s, enable);
+ pfd_override_throttle(c->u.pfd.s, enable);
break;
}
}
return 0;
}
+void ssh_agent_callback(void *sshv, void *reply, int replylen)
+{
+ Ssh ssh = (Ssh) sshv;
+
+ ssh->agent_response = reply;
+ ssh->agent_response_len = replylen;
+
+ if (ssh->version == 1)
+ do_ssh1_login(ssh, NULL, -1, 0);
+ else
+ do_ssh2_authconn(ssh, NULL, -1, 0);
+}
+
+void ssh_agentf_callback(void *cv, void *reply, int replylen)
+{
+ struct ssh_channel *c = (struct ssh_channel *)cv;
+ Ssh ssh = c->ssh;
+ void *sentreply = reply;
+
+ if (!sentreply) {
+ /* Fake SSH_AGENT_FAILURE. */
+ sentreply = "\0\0\0\1\5";
+ replylen = 5;
+ }
+ if (ssh->version == 2) {
+ ssh2_add_channel_data(c, sentreply, replylen);
+ ssh2_try_send(c);
+ } else {
+ send_packet(ssh, SSH1_MSG_CHANNEL_DATA,
+ PKT_INT, c->remoteid,
+ PKT_INT, replylen,
+ PKT_DATA, sentreply, replylen,
+ PKT_END);
+ }
+ if (reply)
+ sfree(reply);
+}
+
/*
* Handle the key exchange and user authentication phases.
*/
crWaitUntil(ispkt);
if (ssh->pktin.type != SSH1_SMSG_PUBLIC_KEY) {
- bombout((ssh,"Public key packet not received"));
- crReturn(0);
+ bombout(("Public key packet not received"));
+ crStop(0);
}
logevent("Received public keys");
}
if (!cipher_chosen) {
if ((s->supported_ciphers_mask & (1 << SSH_CIPHER_3DES)) == 0)
- bombout((ssh,"Server violates SSH 1 protocol by not "
+ bombout(("Server violates SSH 1 protocol by not "
"supporting 3DES encryption"));
else
/* shouldn't happen */
- bombout((ssh,"No supported ciphers found"));
- crReturn(0);
+ bombout(("No supported ciphers found"));
+ crStop(0);
}
/* Warn about chosen cipher if necessary. */
crWaitUntil(ispkt);
if (ssh->pktin.type != SSH1_SMSG_SUCCESS) {
- bombout((ssh,"Encryption not successfully enabled"));
- crReturn(0);
+ bombout(("Encryption not successfully enabled"));
+ crStop(0);
}
logevent("Successfully started encryption");
* Terminate.
*/
logevent("No username provided. Abandoning session.");
- ssh->state = SSH_STATE_CLOSED;
- crReturn(1);
+ ssh_closing((Plug)ssh, NULL, 0, 0);
+ crStop(1);
}
} else {
int ret; /* need not be kept over crReturn */
/* Request the keys held by the agent. */
PUT_32BIT(s->request, 1);
s->request[4] = SSH1_AGENTC_REQUEST_RSA_IDENTITIES;
- agent_query(s->request, 5, &r, &s->responselen);
+ if (!agent_query(s->request, 5, &r, &s->responselen,
+ ssh_agent_callback, ssh)) {
+ do {
+ crReturn(0);
+ if (ispkt) {
+ bombout(("Unexpected data from server while waiting"
+ " for agent response"));
+ crStop(0);
+ }
+ } while (ispkt || inlen > 0);
+ r = ssh->agent_response;
+ s->responselen = ssh->agent_response_len;
+ }
s->response = (unsigned char *) r;
if (s->response && s->responselen >= 5 &&
s->response[4] == SSH1_AGENT_RSA_IDENTITIES_ANSWER) {
memcpy(q, s->session_id, 16);
q += 16;
PUT_32BIT(q, 1); /* response format */
- agent_query(agentreq, len + 4, &vret, &retlen);
+ if (!agent_query(agentreq, len + 4, &vret, &retlen,
+ ssh_agent_callback, ssh)) {
+ sfree(agentreq);
+ do {
+ crReturn(0);
+ if (ispkt) {
+ bombout(("Unexpected data from server"
+ " while waiting for agent"
+ " response"));
+ crStop(0);
+ }
+ } while (ispkt || inlen > 0);
+ vret = ssh->agent_response;
+ retlen = ssh->agent_response_len;
+ } else
+ sfree(agentreq);
ret = vret;
- sfree(agentreq);
if (ret) {
if (ret[4] == SSH1_AGENT_RSA_RESPONSE) {
logevent("Sending Pageant's response");
PKT_END);
logevent("Unable to authenticate");
connection_fatal(ssh->frontend, "Unable to authenticate");
- ssh->state = SSH_STATE_CLOSED;
- crReturn(1);
+ ssh_closing((Plug)ssh, NULL, 0, 0);
+ crStop(1);
}
} else {
/* Prompt may have come from server. We've munged it a bit, so
continue; /* go and try password */
}
if (ssh->pktin.type != SSH1_SMSG_AUTH_RSA_CHALLENGE) {
- bombout((ssh,"Bizarre response to offer of public key"));
- crReturn(0);
+ bombout(("Bizarre response to offer of public key"));
+ crStop(0);
}
{
" our public key.\r\n");
continue; /* go and try password */
} else if (ssh->pktin.type != SSH1_SMSG_SUCCESS) {
- bombout((ssh,"Bizarre response to RSA authentication response"));
- crReturn(0);
+ bombout(("Bizarre response to RSA authentication response"));
+ crStop(0);
}
break; /* we're through! */
c_write_str(ssh, "Access denied\r\n");
logevent("Authentication refused");
} else if (ssh->pktin.type != SSH1_SMSG_SUCCESS) {
- bombout((ssh,"Strange packet received, type %d", ssh->pktin.type));
- crReturn(0);
+ bombout(("Strange packet received, type %d", ssh->pktin.type));
+ crStop(0);
}
}
{
Ssh ssh = c->ssh;
+ if (ssh->state != SSH_STATE_SESSION) {
+ assert(ssh->state == SSH_STATE_CLOSED);
+ return;
+ }
+
if (c && !c->closes) {
/*
* If the channel's remoteid is -1, we have sent
{
Ssh ssh = c->ssh;
+ if (ssh->state != SSH_STATE_SESSION) {
+ assert(ssh->state == SSH_STATE_CLOSED);
+ return 0;
+ }
+
if (ssh->version == 1) {
send_packet(ssh, SSH1_MSG_CHANNEL_DATA,
PKT_INT, c->remoteid,
{
Ssh ssh = c->ssh;
+ if (ssh->state != SSH_STATE_SESSION) {
+ assert(ssh->state == SSH_STATE_CLOSED);
+ return;
+ }
+
if (ssh->version == 1) {
if (c->v.v1.throttling && bufsize < SSH1_BUFFER_LIMIT) {
c->v.v1.throttling = 0;
} while (!ispkt);
if (ssh->pktin.type != SSH1_SMSG_SUCCESS
&& ssh->pktin.type != SSH1_SMSG_FAILURE) {
- bombout((ssh,"Protocol confusion"));
- crReturnV;
+ bombout(("Protocol confusion"));
+ crStopV;
} else if (ssh->pktin.type == SSH1_SMSG_FAILURE) {
logevent("Agent forwarding refused");
} else {
} while (!ispkt);
if (ssh->pktin.type != SSH1_SMSG_SUCCESS
&& ssh->pktin.type != SSH1_SMSG_FAILURE) {
- bombout((ssh,"Protocol confusion"));
- crReturnV;
+ bombout(("Protocol confusion"));
+ crStopV;
} else if (ssh->pktin.type == SSH1_SMSG_FAILURE) {
logevent("X11 forwarding refused");
} else {
if (n < 255) sports[n++] = *ssh->portfwd_strptr++;
}
sports[n] = 0;
- if (*ssh->portfwd_strptr == '\t')
- ssh->portfwd_strptr++;
- n = 0;
- while (*ssh->portfwd_strptr && *ssh->portfwd_strptr != ':') {
- if (n < 255) host[n++] = *ssh->portfwd_strptr++;
- }
- host[n] = 0;
- if (*ssh->portfwd_strptr == ':')
+ if (type != 'D') {
+ if (*ssh->portfwd_strptr == '\t')
+ ssh->portfwd_strptr++;
+ n = 0;
+ while (*ssh->portfwd_strptr && *ssh->portfwd_strptr != ':') {
+ if (n < 255) host[n++] = *ssh->portfwd_strptr++;
+ }
+ host[n] = 0;
+ if (*ssh->portfwd_strptr == ':')
+ ssh->portfwd_strptr++;
+ n = 0;
+ while (*ssh->portfwd_strptr) {
+ if (n < 255) dports[n++] = *ssh->portfwd_strptr++;
+ }
+ dports[n] = 0;
ssh->portfwd_strptr++;
- n = 0;
- while (*ssh->portfwd_strptr) {
- if (n < 255) dports[n++] = *ssh->portfwd_strptr++;
- }
- dports[n] = 0;
- ssh->portfwd_strptr++;
- dport = atoi(dports);
- dserv = 0;
- if (dport == 0) {
- dserv = 1;
- dport = net_service_lookup(dports);
- if (!dport) {
- logeventf(ssh, "Service lookup failed for"
- " destination port \"%s\"", dports);
+ dport = atoi(dports);
+ dserv = 0;
+ if (dport == 0) {
+ dserv = 1;
+ dport = net_service_lookup(dports);
+ if (!dport) {
+ logeventf(ssh, "Service lookup failed for"
+ " destination port \"%s\"", dports);
+ }
}
+ } else {
+ while (*ssh->portfwd_strptr) ssh->portfwd_strptr++;
+ dport = dserv = -1;
}
sport = atoi(sports);
sserv = 0;
host,
(int)(dserv ? strlen(dports) : 0), dports,
dserv, "(", dport, dserv, ")");
+ } else if (type == 'D') {
+ pfd_addforward(NULL, -1, *saddr ? saddr : NULL,
+ sport, ssh, &ssh->cfg);
+ logeventf(ssh, "Local port %.*s%.*s%.*s%.*s%d%.*s"
+ " doing SOCKS dynamic forwarding",
+ (int)(*saddr?strlen(saddr):0), *saddr?saddr:NULL,
+ (int)(*saddr?1:0), ":",
+ (int)(sserv ? strlen(sports) : 0), sports,
+ sserv, "(", sport, sserv, ")");
} else {
struct ssh_rportfwd *pf;
pf = snew(struct ssh_rportfwd);
} while (!ispkt);
if (ssh->pktin.type != SSH1_SMSG_SUCCESS
&& ssh->pktin.type != SSH1_SMSG_FAILURE) {
- bombout((ssh,"Protocol confusion"));
- crReturnV;
+ bombout(("Protocol confusion"));
+ crStopV;
} else if (ssh->pktin.type == SSH1_SMSG_FAILURE) {
c_write_str(ssh, "Server refused port"
" forwarding\r\n");
} while (!ispkt);
if (ssh->pktin.type != SSH1_SMSG_SUCCESS
&& ssh->pktin.type != SSH1_SMSG_FAILURE) {
- bombout((ssh,"Protocol confusion"));
- crReturnV;
+ bombout(("Protocol confusion"));
+ crStopV;
} else if (ssh->pktin.type == SSH1_SMSG_FAILURE) {
c_write_str(ssh, "Server refused to allocate pty\r\n");
ssh->editing = ssh->echoing = 1;
} while (!ispkt);
if (ssh->pktin.type != SSH1_SMSG_SUCCESS
&& ssh->pktin.type != SSH1_SMSG_FAILURE) {
- bombout((ssh,"Protocol confusion"));
- crReturnV;
+ bombout(("Protocol confusion"));
+ crStopV;
} else if (ssh->pktin.type == SSH1_SMSG_FAILURE) {
c_write_str(ssh, "Server refused to compress\r\n");
}
ssh1_throttle(ssh, +1);
}
} else if (ssh->pktin.type == SSH1_MSG_DISCONNECT) {
- ssh->state = SSH_STATE_CLOSED;
+ ssh_closing((Plug)ssh, NULL, 0, 0);
logevent("Received disconnect request");
- crReturnV;
+ crStopV;
} else if (ssh->pktin.type == SSH1_SMSG_X11_OPEN) {
/* Remote side is trying to open a channel to talk to our
* X-Server. Give them back a local channel number. */
sfree(c);
}
} else {
- bombout((ssh,"Received CHANNEL_CLOSE%s for %s channel %d\n",
+ bombout(("Received CHANNEL_CLOSE%s for %s channel %d\n",
ssh->pktin.type == SSH1_MSG_CHANNEL_CLOSE ? "" :
"_CONFIRMATION", c ? "half-open" : "nonexistent",
i));
+ crStopV;
}
} else if (ssh->pktin.type == SSH1_MSG_CHANNEL_DATA) {
/* Data sent down one of our channels. */
struct ssh_channel *c;
c = find234(ssh->channels, &i, ssh_channelfind);
if (c) {
- int bufsize;
+ int bufsize = 0;
switch (c->type) {
case CHAN_X11:
bufsize = x11_send(c->u.x11.s, (char *)p, len);
c->u.a.lensofar += l;
}
if (c->u.a.lensofar == c->u.a.totallen) {
- void *reply, *sentreply;
+ void *reply;
int replylen;
- agent_query(c->u.a.message,
- c->u.a.totallen, &reply,
- &replylen);
- if (reply)
- sentreply = reply;
- else {
- /* Fake SSH_AGENT_FAILURE. */
- sentreply = "\0\0\0\1\5";
- replylen = 5;
- }
- send_packet(ssh, SSH1_MSG_CHANNEL_DATA,
- PKT_INT, c->remoteid,
- PKT_INT, replylen,
- PKT_DATA, sentreply, replylen,
- PKT_END);
- if (reply)
- sfree(reply);
+ if (agent_query(c->u.a.message,
+ c->u.a.totallen,
+ &reply, &replylen,
+ ssh_agentf_callback, c))
+ ssh_agentf_callback(c, reply, replylen);
sfree(c->u.a.message);
c->u.a.lensofar = 0;
}
* encrypted packet, we close the session once
* we've sent EXIT_CONFIRMATION.
*/
- ssh->state = SSH_STATE_CLOSED;
- crReturnV;
+ ssh_closing((Plug)ssh, NULL, 0, 0);
+ crStopV;
} else {
- bombout((ssh,"Strange packet received: type %d", ssh->pktin.type));
- crReturnV;
+ bombout(("Strange packet received: type %d", ssh->pktin.type));
+ crStopV;
}
} else {
while (inlen > 0) {
int i, j, len;
if (ssh->pktin.type != SSH2_MSG_KEXINIT) {
- bombout((ssh,"expected key exchange packet from server"));
- crReturn(0);
+ bombout(("expected key exchange packet from server"));
+ crStop(0);
}
ssh->kex = NULL;
ssh->hostkey = NULL;
}
}
if (!s->cscipher_tobe) {
- bombout((ssh,"Couldn't agree a client-to-server cipher (available: %s)",
+ bombout(("Couldn't agree a client-to-server cipher (available: %s)",
str ? str : "(null)"));
- crReturn(0);
+ crStop(0);
}
ssh2_pkt_getstring(ssh, &str, &len); /* server->client cipher */
}
}
if (!s->sccipher_tobe) {
- bombout((ssh,"Couldn't agree a server-to-client cipher (available: %s)",
+ bombout(("Couldn't agree a server-to-client cipher (available: %s)",
str ? str : "(null)"));
- crReturn(0);
+ crStop(0);
}
ssh2_pkt_getstring(ssh, &str, &len); /* client->server mac */
crWaitUntil(ispkt);
if (ssh->pktin.type != SSH2_MSG_KEX_DH_GEX_GROUP) {
- bombout((ssh,"expected key exchange group packet from server"));
- crReturn(0);
+ bombout(("expected key exchange group packet from server"));
+ crStop(0);
}
s->p = ssh2_pkt_getmp(ssh);
s->g = ssh2_pkt_getmp(ssh);
crWaitUntil(ispkt);
if (ssh->pktin.type != s->kex_reply_value) {
- bombout((ssh,"expected key exchange reply packet from server"));
- crReturn(0);
+ bombout(("expected key exchange reply packet from server"));
+ crStop(0);
}
ssh2_pkt_getstring(ssh, &s->hostkeydata, &s->hostkeylen);
s->f = ssh2_pkt_getmp(ssh);
if (!s->hkey ||
!ssh->hostkey->verifysig(s->hkey, s->sigdata, s->siglen,
(char *)s->exchange_hash, 20)) {
- bombout((ssh,"Server's host key did not match the signature supplied"));
- crReturn(0);
+ bombout(("Server's host key did not match the signature supplied"));
+ crStop(0);
}
/*
*/
crWaitUntil(ispkt);
if (ssh->pktin.type != SSH2_MSG_NEWKEYS) {
- bombout((ssh,"expected new-keys packet from server"));
- crReturn(0);
+ bombout(("expected new-keys packet from server"));
+ crStop(0);
}
/*
ssh2_pkt_send(ssh);
crWaitUntilV(ispkt);
if (ssh->pktin.type != SSH2_MSG_SERVICE_ACCEPT) {
- bombout((ssh,"Server refused user authentication protocol"));
- crReturnV;
+ bombout(("Server refused user authentication protocol"));
+ crStopV;
}
/*
* Terminate.
*/
logevent("No username provided. Abandoning session.");
- ssh->state = SSH_STATE_CLOSED;
- crReturnV;
+ ssh_closing((Plug)ssh, NULL, 0, 0);
+ crStopV;
}
} else {
int ret; /* need not be saved across crReturn */
if (!s->gotit)
s->curr_prompt = 0;
} else if (ssh->pktin.type != SSH2_MSG_USERAUTH_FAILURE) {
- bombout((ssh,"Strange packet received during authentication: type %d",
+ bombout(("Strange packet received during authentication: type %d",
ssh->pktin.type));
- crReturnV;
+ crStopV;
}
s->gotit = FALSE;
/* Request the keys held by the agent. */
PUT_32BIT(s->request, 1);
s->request[4] = SSH2_AGENTC_REQUEST_IDENTITIES;
- agent_query(s->request, 5, &r, &s->responselen);
+ if (!agent_query(s->request, 5, &r, &s->responselen,
+ ssh_agent_callback, ssh)) {
+ do {
+ crReturnV;
+ if (ispkt) {
+ bombout(("Unexpected data from server while"
+ " waiting for agent response"));
+ crStopV;
+ }
+ } while (ispkt || inlen > 0);
+ r = ssh->agent_response;
+ s->responselen = ssh->agent_response_len;
+ }
s->response = (unsigned char *) r;
if (s->response && s->responselen >= 5 &&
s->response[4] == SSH2_AGENT_IDENTITIES_ANSWER) {
s->q += ssh->pktout.length - 5;
/* And finally the (zero) flags word. */
PUT_32BIT(s->q, 0);
- agent_query(s->agentreq, s->len + 4, &vret, &s->retlen);
+ if (!agent_query(s->agentreq, s->len + 4,
+ &vret, &s->retlen,
+ ssh_agent_callback, ssh)) {
+ do {
+ crReturnV;
+ if (ispkt) {
+ bombout(("Unexpected data from server"
+ " while waiting for agent"
+ " response"));
+ crStopV;
+ }
+ } while (ispkt || inlen > 0);
+ vret = ssh->agent_response;
+ s->retlen = ssh->agent_response_len;
+ }
s->ret = vret;
sfree(s->agentreq);
if (s->ret) {
logevent("Unable to authenticate");
connection_fatal(ssh->frontend,
"Unable to authenticate");
- ssh->state = SSH_STATE_CLOSED;
- crReturnV;
+ ssh_closing((Plug)ssh, NULL, 0, 0);
+ crStopV;
}
} else {
int ret; /* need not be saved across crReturn */
" methods available");
ssh2_pkt_addstring(ssh, "en"); /* language tag */
ssh2_pkt_send(ssh);
- ssh->state = SSH_STATE_CLOSED;
- crReturnV;
+ ssh_closing((Plug)ssh, NULL, 0, 0);
+ crStopV;
}
}
} while (!s->we_are_in);
ssh2_pkt_send(ssh);
crWaitUntilV(ispkt);
if (ssh->pktin.type != SSH2_MSG_CHANNEL_OPEN_CONFIRMATION) {
- bombout((ssh,"Server refused to open a session"));
- crReturnV;
+ bombout(("Server refused to open a session"));
+ crStopV;
/* FIXME: error data comes back in FAILURE packet */
}
if (ssh2_pkt_getuint32(ssh) != ssh->mainchan->localid) {
- bombout((ssh,"Server's channel confirmation cited wrong channel"));
- crReturnV;
+ bombout(("Server's channel confirmation cited wrong channel"));
+ crStopV;
}
ssh->mainchan->remoteid = ssh2_pkt_getuint32(ssh);
ssh->mainchan->type = CHAN_MAINSESSION;
if (ssh->pktin.type != SSH2_MSG_CHANNEL_SUCCESS) {
if (ssh->pktin.type != SSH2_MSG_CHANNEL_FAILURE) {
- bombout((ssh,"Unexpected response to X11 forwarding request:"
+ bombout(("Unexpected response to X11 forwarding request:"
" packet type %d", ssh->pktin.type));
- crReturnV;
+ crStopV;
}
logevent("X11 forwarding refused");
} else {
if (n < 255) sports[n++] = *ssh->portfwd_strptr++;
}
sports[n] = 0;
- if (*ssh->portfwd_strptr == '\t')
- ssh->portfwd_strptr++;
- n = 0;
- while (*ssh->portfwd_strptr && *ssh->portfwd_strptr != ':') {
- if (n < 255) host[n++] = *ssh->portfwd_strptr++;
- }
- host[n] = 0;
- if (*ssh->portfwd_strptr == ':')
+ if (type != 'D') {
+ if (*ssh->portfwd_strptr == '\t')
+ ssh->portfwd_strptr++;
+ n = 0;
+ while (*ssh->portfwd_strptr && *ssh->portfwd_strptr != ':') {
+ if (n < 255) host[n++] = *ssh->portfwd_strptr++;
+ }
+ host[n] = 0;
+ if (*ssh->portfwd_strptr == ':')
+ ssh->portfwd_strptr++;
+ n = 0;
+ while (*ssh->portfwd_strptr) {
+ if (n < 255) dports[n++] = *ssh->portfwd_strptr++;
+ }
+ dports[n] = 0;
ssh->portfwd_strptr++;
- n = 0;
- while (*ssh->portfwd_strptr) {
- if (n < 255) dports[n++] = *ssh->portfwd_strptr++;
- }
- dports[n] = 0;
- ssh->portfwd_strptr++;
- dport = atoi(dports);
- dserv = 0;
- if (dport == 0) {
- dserv = 1;
- dport = net_service_lookup(dports);
- if (!dport) {
- logeventf(ssh, "Service lookup failed for destination"
- " port \"%s\"", dports);
+ dport = atoi(dports);
+ dserv = 0;
+ if (dport == 0) {
+ dserv = 1;
+ dport = net_service_lookup(dports);
+ if (!dport) {
+ logeventf(ssh, "Service lookup failed for destination"
+ " port \"%s\"", dports);
+ }
}
+ } else {
+ while (*ssh->portfwd_strptr) ssh->portfwd_strptr++;
+ dport = dserv = -1;
}
sport = atoi(sports);
sserv = 0;
host,
(int)(dserv ? strlen(dports) : 0), dports,
dserv, "(", dport, dserv, ")");
+ } else if (type == 'D') {
+ pfd_addforward(NULL, -1, *saddr ? saddr : NULL,
+ sport, ssh, &ssh->cfg);
+ logeventf(ssh, "Local port %.*s%.*s%.*s%.*s%d%.*s"
+ " doing SOCKS dynamic forwarding",
+ (int)(*saddr?strlen(saddr):0), *saddr?saddr:NULL,
+ (int)(*saddr?1:0), ":",
+ (int)(sserv ? strlen(sports) : 0), sports,
+ sserv, "(", sport, sserv, ")");
} else {
struct ssh_rportfwd *pf;
pf = snew(struct ssh_rportfwd);
if (ssh->pktin.type != SSH2_MSG_REQUEST_SUCCESS) {
if (ssh->pktin.type != SSH2_MSG_REQUEST_FAILURE) {
- bombout((ssh,"Unexpected response to port "
+ bombout(("Unexpected response to port "
"forwarding request: packet type %d",
ssh->pktin.type));
- crReturnV;
+ crStopV;
}
logevent("Server refused this port forwarding");
} else {
if (ssh->pktin.type != SSH2_MSG_CHANNEL_SUCCESS) {
if (ssh->pktin.type != SSH2_MSG_CHANNEL_FAILURE) {
- bombout((ssh,"Unexpected response to agent forwarding request:"
+ bombout(("Unexpected response to agent forwarding request:"
" packet type %d", ssh->pktin.type));
- crReturnV;
+ crStopV;
}
logevent("Agent forwarding refused");
} else {
if (ssh->pktin.type != SSH2_MSG_CHANNEL_SUCCESS) {
if (ssh->pktin.type != SSH2_MSG_CHANNEL_FAILURE) {
- bombout((ssh,"Unexpected response to pty request:"
+ bombout(("Unexpected response to pty request:"
" packet type %d", ssh->pktin.type));
- crReturnV;
+ crStopV;
}
c_write_str(ssh, "Server refused to allocate pty\r\n");
ssh->editing = ssh->echoing = 1;
} while (ssh->pktin.type == SSH2_MSG_CHANNEL_WINDOW_ADJUST);
if (ssh->pktin.type != SSH2_MSG_CHANNEL_SUCCESS) {
if (ssh->pktin.type != SSH2_MSG_CHANNEL_FAILURE) {
- bombout((ssh,"Unexpected response to shell/command request:"
+ bombout(("Unexpected response to shell/command request:"
" packet type %d", ssh->pktin.type));
- crReturnV;
+ crStopV;
}
/*
* We failed to start the command. If this is the
ssh->fallback_cmd = TRUE;
continue;
}
- bombout((ssh,"Server refused to start a shell/command"));
- crReturnV;
+ bombout(("Server refused to start a shell/command"));
+ crStopV;
} else {
logevent("Started a shell/command");
}
continue; /* extended but not stderr */
ssh2_pkt_getstring(ssh, &data, &length);
if (data) {
- int bufsize;
+ int bufsize = 0;
c->v.v2.locwindow -= length;
switch (c->type) {
case CHAN_MAINSESSION:
c->u.a.lensofar += l;
}
if (c->u.a.lensofar == c->u.a.totallen) {
- void *reply, *sentreply;
+ void *reply;
int replylen;
- agent_query(c->u.a.message,
- c->u.a.totallen, &reply,
- &replylen);
- if (reply)
- sentreply = reply;
- else {
- /* Fake SSH_AGENT_FAILURE. */
- sentreply = "\0\0\0\1\5";
- replylen = 5;
- }
- ssh2_add_channel_data(c, sentreply, replylen);
- s->try_send = TRUE;
- if (reply)
- sfree(reply);
+ if (agent_query(c->u.a.message,
+ c->u.a.totallen,
+ &reply, &replylen,
+ ssh_agentf_callback, c))
+ ssh_agentf_callback(c, reply, replylen);
sfree(c->u.a.message);
c->u.a.lensofar = 0;
}
c = find234(ssh->channels, &i, ssh_channelfind);
if (!c || ((int)c->remoteid) == -1) {
- bombout((ssh,"Received CHANNEL_CLOSE for %s channel %d\n",
+ bombout(("Received CHANNEL_CLOSE for %s channel %d\n",
c ? "half-open" : "nonexistent", i));
+ crStopV;
}
/* Do pre-close processing on the channel. */
switch (c->type) {
* See if that was the last channel left open.
*/
if (count234(ssh->channels) == 0) {
+ logevent("All channels closed. Disconnecting");
#if 0
/*
* We used to send SSH_MSG_DISCONNECT here,
* this is more polite than sending a
* DISCONNECT. So now we don't.
*/
- logevent("All channels closed. Disconnecting");
ssh2_pkt_init(ssh, SSH2_MSG_DISCONNECT);
ssh2_pkt_adduint32(ssh, SSH2_DISCONNECT_BY_APPLICATION);
ssh2_pkt_addstring(ssh, "All open channels closed");
ssh2_pkt_addstring(ssh, "en"); /* language tag */
ssh2_pkt_send(ssh);
#endif
- ssh->state = SSH_STATE_CLOSED;
- crReturnV;
+ ssh_closing((Plug)ssh, NULL, 0, 0);
+ crStopV;
}
continue; /* remote sends close; ignore (FIXME) */
} else if (ssh->pktin.type == SSH2_MSG_CHANNEL_WINDOW_ADJUST) {
ssh2_pkt_addstring(ssh, buf);
ssh2_pkt_addstring(ssh, "en"); /* language tag */
ssh2_pkt_send(ssh);
- connection_fatal("%s", buf);
- ssh->state = SSH_STATE_CLOSED;
- crReturnV;
+ connection_fatal(ssh->frontend, "%s", buf);
+ ssh_closing((Plug)ssh, NULL, 0, 0);
+ crStopV;
}
/*
int typelen;
char *peeraddr;
int peeraddrlen;
- int port;
+ int peerport;
char *error = NULL;
struct ssh_channel *c;
unsigned remid, winsize, pktsize;
remid = ssh2_pkt_getuint32(ssh);
winsize = ssh2_pkt_getuint32(ssh);
pktsize = ssh2_pkt_getuint32(ssh);
- ssh2_pkt_getstring(ssh, &peeraddr, &peeraddrlen);
- port = ssh2_pkt_getuint32(ssh);
if (typelen == 3 && !memcmp(type, "x11", 3)) {
- char *addrstr = snewn(peeraddrlen+1, char);
+ char *addrstr;
+
+ ssh2_pkt_getstring(ssh, &peeraddr, &peeraddrlen);
+ addrstr = snewn(peeraddrlen+1, char);
memcpy(addrstr, peeraddr, peeraddrlen);
peeraddr[peeraddrlen] = '\0';
+ peerport = ssh2_pkt_getuint32(ssh);
if (!ssh->X11_fwd_enabled)
error = "X11 forwarding is not enabled";
else if (x11_init(&c->u.x11.s, ssh->cfg.x11_display, c,
- ssh->x11auth, addrstr, port,
+ ssh->x11auth, addrstr, peerport,
&ssh->cfg) != NULL) {
error = "Unable to open an X11 connection";
} else {
int dummylen;
ssh2_pkt_getstring(ssh, &dummy, &dummylen);/* skip address */
pf.sport = ssh2_pkt_getuint32(ssh);
+ ssh2_pkt_getstring(ssh, &peeraddr, &peeraddrlen);
+ peerport = ssh2_pkt_getuint32(ssh);
realpf = find234(ssh->rportfwds, &pf, NULL);
if (realpf == NULL) {
error = "Remote port is not recognised";
ssh2_pkt_send(ssh);
}
} else {
- bombout((ssh,"Strange packet received: type %d", ssh->pktin.type));
- crReturnV;
+ bombout(("Strange packet received: type %d", ssh->pktin.type));
+ crStopV;
}
} else {
/*
ssh = snew(struct ssh_tag);
ssh->cfg = *cfg; /* STRUCTURE COPY */
+ ssh->version = 0; /* when not ready yet */
ssh->s = NULL;
ssh->cipher = NULL;
ssh->v1_cipher_ctx = NULL;
sfree(ssh->do_ssh2_authconn_state);
if (ssh->s)
- sk_close(ssh->s);
+ ssh_do_close(ssh);
sfree(ssh);
}
}
/*
+ * Return a list of the special codes that make sense in this
+ * protocol.
+ */
+static const struct telnet_special *ssh_get_specials(void *handle)
+{
+ Ssh ssh = (Ssh) handle;
+
+ if (ssh->version == 1) {
+ static const struct telnet_special ssh1_specials[] = {
+ {"IGNORE message", TS_NOP},
+ {NULL, 0}
+ };
+ return ssh1_specials;
+ } else if (ssh->version == 2) {
+ static const struct telnet_special ssh2_specials[] = {
+ {"Break", TS_BRK},
+ {"IGNORE message", TS_NOP},
+ {NULL, 0}
+ };
+ return ssh2_specials;
+ } else
+ return NULL;
+}
+
+/*
* Send Telnet special codes. TS_EOF is useful for `plink', so you
* can send an EOF and collect resulting output (e.g. `plink
* hostname sort').
ssh2_pkt_send(ssh);
}
logevent("Sent EOF message");
- } else if (code == TS_PING) {
+ } else if (code == TS_PING || code == TS_NOP) {
if (ssh->state == SSH_STATE_CLOSED
|| ssh->state == SSH_STATE_PREPACKET) return;
if (ssh->version == 1) {
ssh2_pkt_addstring_start(ssh);
ssh2_pkt_send(ssh);
}
+ } else if (code == TS_BRK) {
+ if (ssh->state == SSH_STATE_CLOSED
+ || ssh->state == SSH_STATE_PREPACKET) return;
+ if (ssh->version == 1) {
+ logevent("Unable to send BREAK signal in SSH1");
+ } else {
+ ssh2_pkt_init(ssh, SSH2_MSG_CHANNEL_REQUEST);
+ ssh2_pkt_adduint32(ssh, ssh->mainchan->remoteid);
+ ssh2_pkt_addstring(ssh, "break");
+ ssh2_pkt_addbool(ssh, 0);
+ ssh2_pkt_adduint32(ssh, 0); /* default break length */
+ ssh2_pkt_send(ssh);
+ }
} else {
/* do nothing */
}
static int ssh_return_exitcode(void *handle)
{
Ssh ssh = (Ssh) handle;
- return ssh->exitcode;
+ if (ssh->s != NULL)
+ return -1;
+ else
+ return (ssh->exitcode >= 0 ? ssh->exitcode : 0);
}
/*
ssh_sendbuffer,
ssh_size,
ssh_special,
+ ssh_get_specials,
ssh_socket,
ssh_return_exitcode,
ssh_sendok,
projects / u / mdw / putty / blobdiff