You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1135 lines
26 KiB
1135 lines
26 KiB
/**
|
|
* xrdp: A Remote Desktop Protocol server.
|
|
*
|
|
* Copyright (C) Jay Sorg 2004-2014
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
* mcs layer
|
|
*/
|
|
|
|
#include "libxrdp.h"
|
|
#include "log.h"
|
|
|
|
/*****************************************************************************/
|
|
struct xrdp_mcs *APP_CC
|
|
xrdp_mcs_create(struct xrdp_sec *owner, struct trans *trans,
|
|
struct stream *client_mcs_data,
|
|
struct stream *server_mcs_data)
|
|
{
|
|
struct xrdp_mcs *self;
|
|
|
|
DEBUG((" in xrdp_mcs_create"));
|
|
self = (struct xrdp_mcs *)g_malloc(sizeof(struct xrdp_mcs), 1);
|
|
self->sec_layer = owner;
|
|
self->userid = 1;
|
|
self->chanid = 1001;
|
|
self->client_mcs_data = client_mcs_data;
|
|
self->server_mcs_data = server_mcs_data;
|
|
self->iso_layer = xrdp_iso_create(self, trans);
|
|
self->channel_list = list_create();
|
|
DEBUG((" out xrdp_mcs_create"));
|
|
return self;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
void APP_CC
|
|
xrdp_mcs_delete(struct xrdp_mcs *self)
|
|
{
|
|
struct mcs_channel_item *channel_item;
|
|
int index;
|
|
int count;
|
|
|
|
if (self == 0)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/* here we have to free the channel items and anything in them */
|
|
count = self->channel_list->count;
|
|
|
|
for (index = count - 1; index >= 0; index--)
|
|
{
|
|
channel_item = (struct mcs_channel_item *)
|
|
list_get_item(self->channel_list, index);
|
|
g_free(channel_item);
|
|
}
|
|
|
|
list_delete(self->channel_list);
|
|
|
|
xrdp_iso_delete(self->iso_layer);
|
|
/* make sure we get null pointer exception if struct is used again. */
|
|
DEBUG(("xrdp_mcs_delete processed"))
|
|
g_memset(self, 0, sizeof(struct xrdp_mcs)) ;
|
|
g_free(self);
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* This function sends channel join confirm */
|
|
/* returns error = 1 ok = 0 */
|
|
static int APP_CC
|
|
xrdp_mcs_send_cjcf(struct xrdp_mcs *self, int userid, int chanid)
|
|
{
|
|
struct stream *s;
|
|
|
|
DEBUG((" in xrdp_mcs_send_cjcf"));
|
|
make_stream(s);
|
|
init_stream(s, 8192);
|
|
|
|
if (xrdp_iso_init(self->iso_layer, s) != 0)
|
|
{
|
|
free_stream(s);
|
|
DEBUG((" out xrdp_mcs_send_cjcf error"));
|
|
return 1;
|
|
}
|
|
|
|
out_uint8(s, (MCS_CJCF << 2) | 2);
|
|
out_uint8(s, 0);
|
|
out_uint16_be(s, userid);
|
|
out_uint16_be(s, chanid); /* TODO Explain why we send this two times */
|
|
out_uint16_be(s, chanid);
|
|
s_mark_end(s);
|
|
|
|
if (xrdp_iso_send(self->iso_layer, s) != 0)
|
|
{
|
|
free_stream(s);
|
|
DEBUG((" out xrdp_mcs_send_cjcf error"));
|
|
return 1;
|
|
}
|
|
|
|
free_stream(s);
|
|
DEBUG((" out xrdp_mcs_send_cjcf"));
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
int APP_CC
|
|
xrdp_mcs_recv(struct xrdp_mcs *self, struct stream *s, int *chan)
|
|
{
|
|
int appid;
|
|
int opcode;
|
|
int len;
|
|
int userid;
|
|
int chanid;
|
|
DEBUG((" in xrdp_mcs_recv"));
|
|
|
|
while (1)
|
|
{
|
|
if (xrdp_iso_recv(self->iso_layer, s) != 0)
|
|
{
|
|
DEBUG((" out xrdp_mcs_recv, xrdp_iso_recv return non zero"));
|
|
g_writeln("xrdp_mcs_recv: xrdp_iso_recv failed");
|
|
return 1;
|
|
}
|
|
|
|
if (!s_check_rem(s, 1))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
in_uint8(s, opcode);
|
|
appid = opcode >> 2;
|
|
|
|
if (appid == MCS_DPUM) /* Disconnect Provider Ultimatum */
|
|
{
|
|
g_writeln("received Disconnect Provider Ultimatum");
|
|
DEBUG((" out xrdp_mcs_recv appid != MCS_DPUM"));
|
|
return 1;
|
|
}
|
|
|
|
/* this is channels getting added from the client */
|
|
if (appid == MCS_CJRQ)
|
|
{
|
|
|
|
if (!s_check_rem(s, 4))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
in_uint16_be(s, userid);
|
|
in_uint16_be(s, chanid);
|
|
log_message(LOG_LEVEL_DEBUG,"MCS_CJRQ - channel join request received");
|
|
DEBUG(("xrdp_mcs_recv adding channel %4.4x", chanid));
|
|
|
|
if (xrdp_mcs_send_cjcf(self, userid, chanid) != 0)
|
|
{
|
|
log_message(LOG_LEVEL_ERROR,"Non handled error from xrdp_mcs_send_cjcf") ;
|
|
}
|
|
|
|
s = libxrdp_force_read(self->iso_layer->trans);
|
|
if (s == 0)
|
|
{
|
|
g_writeln("xrdp_mcs_recv: libxrdp_force_read failed");
|
|
return 1;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
if (appid == MCS_SDRQ || appid == MCS_SDIN)
|
|
{
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
log_message(LOG_LEVEL_DEBUG,"Received an unhandled appid:%d",appid);
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
if (appid != MCS_SDRQ)
|
|
{
|
|
DEBUG((" out xrdp_mcs_recv err got 0x%x need MCS_SDRQ", appid));
|
|
return 1;
|
|
}
|
|
|
|
if (!s_check_rem(s, 6))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
in_uint8s(s, 2);
|
|
in_uint16_be(s, *chan);
|
|
in_uint8s(s, 1);
|
|
in_uint8(s, len);
|
|
|
|
if (len & 0x80)
|
|
{
|
|
if (!s_check_rem(s, 1))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8s(s, 1);
|
|
}
|
|
|
|
DEBUG((" out xrdp_mcs_recv"));
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_mcs_ber_parse_header(struct xrdp_mcs *self, struct stream *s,
|
|
int tag_val, int *len)
|
|
{
|
|
int tag;
|
|
int l;
|
|
int i;
|
|
|
|
if (tag_val > 0xff)
|
|
{
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint16_be(s, tag);
|
|
}
|
|
else
|
|
{
|
|
if (!s_check_rem(s, 1))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8(s, tag);
|
|
}
|
|
|
|
if (tag != tag_val)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (!s_check_rem(s, 1))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
in_uint8(s, l);
|
|
|
|
if (l & 0x80)
|
|
{
|
|
l = l & ~0x80;
|
|
*len = 0;
|
|
|
|
while (l > 0)
|
|
{
|
|
if (!s_check_rem(s, 1))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8(s, i);
|
|
*len = (*len << 8) | i;
|
|
l--;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
*len = l;
|
|
}
|
|
|
|
if (s_check(s))
|
|
{
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_mcs_parse_domain_params(struct xrdp_mcs *self, struct stream *s)
|
|
{
|
|
int len;
|
|
|
|
if (xrdp_mcs_ber_parse_header(self, s, MCS_TAG_DOMAIN_PARAMS, &len) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if ((len < 0) || !s_check_rem(s, len))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
in_uint8s(s, len);
|
|
|
|
if (s_check(s))
|
|
{
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_mcs_recv_connect_initial(struct xrdp_mcs *self)
|
|
{
|
|
int len;
|
|
struct stream *s;
|
|
|
|
s = libxrdp_force_read(self->iso_layer->trans);
|
|
if (s == 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (xrdp_iso_recv(self->iso_layer, s) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (xrdp_mcs_ber_parse_header(self, s, MCS_CONNECT_INITIAL, &len) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (xrdp_mcs_ber_parse_header(self, s, BER_TAG_OCTET_STRING, &len) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if ((len < 0) || !s_check_rem(s, len))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
in_uint8s(s, len);
|
|
|
|
if (xrdp_mcs_ber_parse_header(self, s, BER_TAG_OCTET_STRING, &len) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if ((len < 0) || !s_check_rem(s, len))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
in_uint8s(s, len);
|
|
|
|
if (xrdp_mcs_ber_parse_header(self, s, BER_TAG_BOOLEAN, &len) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if ((len < 0) || !s_check_rem(s, len))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
in_uint8s(s, len);
|
|
|
|
if (xrdp_mcs_parse_domain_params(self, s) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (xrdp_mcs_parse_domain_params(self, s) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (xrdp_mcs_parse_domain_params(self, s) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (xrdp_mcs_ber_parse_header(self, s, BER_TAG_OCTET_STRING, &len) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/* mcs data can not be zero length */
|
|
if ((len <= 0) || (len > 16 * 1024))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (!s_check_rem(s, len))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/* make a copy of client mcs data */
|
|
init_stream(self->client_mcs_data, len);
|
|
out_uint8a(self->client_mcs_data, s->p, len);
|
|
in_uint8s(s, len);
|
|
s_mark_end(self->client_mcs_data);
|
|
|
|
if (s_check_end(s))
|
|
{
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_mcs_recv_edrq(struct xrdp_mcs *self)
|
|
{
|
|
int opcode;
|
|
struct stream *s;
|
|
|
|
DEBUG((" in xrdp_mcs_recv_edrq"));
|
|
|
|
s = libxrdp_force_read(self->iso_layer->trans);
|
|
if (s == 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (xrdp_iso_recv(self->iso_layer, s) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (!s_check_rem(s, 1))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
in_uint8(s, opcode);
|
|
|
|
if ((opcode >> 2) != MCS_EDRQ)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (!s_check_rem(s, 4))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
in_uint8s(s, 2);
|
|
in_uint8s(s, 2);
|
|
|
|
if (opcode & 2)
|
|
{
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint16_be(s, self->userid);
|
|
}
|
|
|
|
if (!(s_check_end(s)))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
DEBUG((" out xrdp_mcs_recv_edrq"));
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_mcs_recv_aurq(struct xrdp_mcs *self)
|
|
{
|
|
int opcode;
|
|
struct stream *s;
|
|
|
|
DEBUG((" in xrdp_mcs_recv_aurq"));
|
|
|
|
s = libxrdp_force_read(self->iso_layer->trans);
|
|
if (s == 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (xrdp_iso_recv(self->iso_layer, s) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (!s_check_rem(s, 1))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
in_uint8(s, opcode);
|
|
|
|
if ((opcode >> 2) != MCS_AURQ)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (opcode & 2)
|
|
{
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint16_be(s, self->userid);
|
|
}
|
|
|
|
if (!(s_check_end(s)))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
DEBUG((" out xrdp_mcs_recv_aurq"));
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_mcs_send_aucf(struct xrdp_mcs *self)
|
|
{
|
|
struct stream *s;
|
|
|
|
DEBUG((" in xrdp_mcs_send_aucf"));
|
|
make_stream(s);
|
|
init_stream(s, 8192);
|
|
|
|
if (xrdp_iso_init(self->iso_layer, s) != 0)
|
|
{
|
|
free_stream(s);
|
|
DEBUG((" out xrdp_mcs_send_aucf error"));
|
|
return 1;
|
|
}
|
|
|
|
out_uint8(s, ((MCS_AUCF << 2) | 2));
|
|
out_uint8s(s, 1);
|
|
out_uint16_be(s, self->userid);
|
|
s_mark_end(s);
|
|
|
|
if (xrdp_iso_send(self->iso_layer, s) != 0)
|
|
{
|
|
free_stream(s);
|
|
DEBUG((" out xrdp_mcs_send_aucf error"));
|
|
return 1;
|
|
}
|
|
|
|
free_stream(s);
|
|
DEBUG((" out xrdp_mcs_send_aucf"));
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_mcs_recv_cjrq(struct xrdp_mcs *self)
|
|
{
|
|
int opcode;
|
|
struct stream *s;
|
|
|
|
s = libxrdp_force_read(self->iso_layer->trans);
|
|
if (s == 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (xrdp_iso_recv(self->iso_layer, s) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (!s_check_rem(s, 1))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
in_uint8(s, opcode);
|
|
|
|
if ((opcode >> 2) != MCS_CJRQ)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (!s_check_rem(s, 4))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
in_uint8s(s, 4);
|
|
|
|
if (opcode & 2)
|
|
{
|
|
if (!s_check_rem(s, 2))
|
|
{
|
|
return 1;
|
|
}
|
|
in_uint8s(s, 2);
|
|
}
|
|
|
|
if (!(s_check_end(s)))
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_mcs_ber_out_header(struct xrdp_mcs *self, struct stream *s,
|
|
int tag_val, int len)
|
|
{
|
|
if (tag_val > 0xff)
|
|
{
|
|
out_uint16_be(s, tag_val);
|
|
}
|
|
else
|
|
{
|
|
out_uint8(s, tag_val);
|
|
}
|
|
|
|
if (len >= 0x80)
|
|
{
|
|
out_uint8(s, 0x82);
|
|
out_uint16_be(s, len);
|
|
}
|
|
else
|
|
{
|
|
out_uint8(s, len);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_mcs_ber_out_int8(struct xrdp_mcs *self, struct stream *s, int value)
|
|
{
|
|
xrdp_mcs_ber_out_header(self, s, BER_TAG_INTEGER, 1);
|
|
out_uint8(s, value);
|
|
return 0;
|
|
}
|
|
|
|
#if 0 /* not used */
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_mcs_ber_out_int16(struct xrdp_mcs *self, struct stream *s, int value)
|
|
{
|
|
xrdp_mcs_ber_out_header(self, s, BER_TAG_INTEGER, 2);
|
|
out_uint8(s, (value >> 8));
|
|
out_uint8(s, value);
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_mcs_ber_out_int24(struct xrdp_mcs *self, struct stream *s, int value)
|
|
{
|
|
xrdp_mcs_ber_out_header(self, s, BER_TAG_INTEGER, 3);
|
|
out_uint8(s, (value >> 16));
|
|
out_uint8(s, (value >> 8));
|
|
out_uint8(s, value);
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_mcs_out_domain_params(struct xrdp_mcs *self, struct stream *s,
|
|
int max_channels,
|
|
int max_users, int max_tokens,
|
|
int max_pdu_size)
|
|
{
|
|
xrdp_mcs_ber_out_header(self, s, MCS_TAG_DOMAIN_PARAMS, 26);
|
|
xrdp_mcs_ber_out_int8(self, s, max_channels);
|
|
xrdp_mcs_ber_out_int8(self, s, max_users);
|
|
xrdp_mcs_ber_out_int8(self, s, max_tokens);
|
|
xrdp_mcs_ber_out_int8(self, s, 1);
|
|
xrdp_mcs_ber_out_int8(self, s, 0);
|
|
xrdp_mcs_ber_out_int8(self, s, 1);
|
|
xrdp_mcs_ber_out_int24(self, s, max_pdu_size);
|
|
xrdp_mcs_ber_out_int8(self, s, 2);
|
|
return 0;
|
|
}
|
|
/*****************************************************************************/
|
|
/* prepare server gcc data to send in mcs response msg */
|
|
int APP_CC
|
|
xrdp_mcs_out_gcc_data(struct xrdp_sec *self)
|
|
{
|
|
struct stream *s;
|
|
int num_channels_even;
|
|
int num_channels;
|
|
int index;
|
|
int channel;
|
|
int gcc_size;
|
|
char* gcc_size_ptr;
|
|
char* ud_ptr;
|
|
|
|
num_channels = self->mcs_layer->channel_list->count;
|
|
num_channels_even = num_channels + (num_channels & 1);
|
|
s = &(self->server_mcs_data);
|
|
init_stream(s, 8192);
|
|
out_uint16_be(s, 5); /* AsnBerObjectIdentifier */
|
|
out_uint16_be(s, 0x14);
|
|
out_uint8(s, 0x7c);
|
|
out_uint16_be(s, 1); /* -- */
|
|
out_uint8(s, 0x2a); /* ConnectPDULen */
|
|
out_uint8(s, 0x14);
|
|
out_uint8(s, 0x76);
|
|
out_uint8(s, 0x0a);
|
|
out_uint8(s, 1);
|
|
out_uint8(s, 1);
|
|
out_uint8(s, 0);
|
|
out_uint16_le(s, 0xc001);
|
|
out_uint8(s, 0);
|
|
out_uint8(s, 0x4d); /* M */
|
|
out_uint8(s, 0x63); /* c */
|
|
out_uint8(s, 0x44); /* D */
|
|
out_uint8(s, 0x6e); /* n */
|
|
/* GCC Response Total Length - 2 bytes , set later */
|
|
gcc_size_ptr = s->p; /* RDPGCCUserDataResponseLength */
|
|
out_uint8s(s, 2);
|
|
ud_ptr = s->p; /* User Data */
|
|
|
|
out_uint16_le(s, SEC_TAG_SRV_INFO);
|
|
if (self->mcs_layer->iso_layer->rdpNegData)
|
|
{
|
|
out_uint16_le(s, 12); /* len */
|
|
}
|
|
else
|
|
{
|
|
out_uint16_le(s, 8); /* len */
|
|
}
|
|
out_uint8(s, 4); /* 4 = rdp5 1 = rdp4 */
|
|
out_uint8(s, 0);
|
|
out_uint8(s, 8);
|
|
out_uint8(s, 0);
|
|
if (self->mcs_layer->iso_layer->rdpNegData)
|
|
{
|
|
/* RequestedProtocol */
|
|
out_uint32_le(s, self->mcs_layer->iso_layer->requestedProtocol);
|
|
}
|
|
out_uint16_le(s, SEC_TAG_SRV_CHANNELS);
|
|
out_uint16_le(s, 8 + (num_channels_even * 2)); /* len */
|
|
out_uint16_le(s, MCS_GLOBAL_CHANNEL); /* 1003, 0x03eb main channel */
|
|
out_uint16_le(s, num_channels); /* number of other channels */
|
|
|
|
for (index = 0; index < num_channels_even; index++)
|
|
{
|
|
if (index < num_channels)
|
|
{
|
|
channel = MCS_GLOBAL_CHANNEL + (index + 1);
|
|
out_uint16_le(s, channel);
|
|
}
|
|
else
|
|
{
|
|
out_uint16_le(s, 0);
|
|
}
|
|
}
|
|
|
|
if (self->rsa_key_bytes == 64)
|
|
{
|
|
g_writeln("xrdp_sec_out_mcs_data: using 512 bit RSA key");
|
|
out_uint16_le(s, SEC_TAG_SRV_CRYPT);
|
|
out_uint16_le(s, 0x00ec); /* len is 236 */
|
|
out_uint32_le(s, self->crypt_method);
|
|
out_uint32_le(s, self->crypt_level);
|
|
out_uint32_le(s, 32); /* 32 bytes random len */
|
|
out_uint32_le(s, 0xb8); /* 184 bytes rsa info(certificate) len */
|
|
out_uint8a(s, self->server_random, 32);
|
|
/* here to end is certificate */
|
|
/* HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ */
|
|
/* TermService\Parameters\Certificate */
|
|
out_uint32_le(s, 1);
|
|
out_uint32_le(s, 1);
|
|
out_uint32_le(s, 1);
|
|
out_uint16_le(s, SEC_TAG_PUBKEY); /* 0x0006 */
|
|
out_uint16_le(s, 0x005c); /* 92 bytes length of SEC_TAG_PUBKEY */
|
|
out_uint32_le(s, SEC_RSA_MAGIC); /* 0x31415352 'RSA1' */
|
|
out_uint32_le(s, 0x0048); /* 72 bytes modulus len */
|
|
out_uint32_be(s, 0x00020000); /* bit len */
|
|
out_uint32_be(s, 0x3f000000); /* data len */
|
|
out_uint8a(s, self->pub_exp, 4); /* pub exp */
|
|
out_uint8a(s, self->pub_mod, 64); /* pub mod */
|
|
out_uint8s(s, 8); /* pad */
|
|
out_uint16_le(s, SEC_TAG_KEYSIG); /* 0x0008 */
|
|
out_uint16_le(s, 72); /* len */
|
|
out_uint8a(s, self->pub_sig, 64); /* pub sig */
|
|
out_uint8s(s, 8); /* pad */
|
|
}
|
|
else if (self->rsa_key_bytes == 256)
|
|
{
|
|
g_writeln("xrdp_sec_out_mcs_data: using 2048 bit RSA key");
|
|
out_uint16_le(s, SEC_TAG_SRV_CRYPT);
|
|
out_uint16_le(s, 0x01ac); /* len is 428 */
|
|
out_uint32_le(s, self->crypt_method);
|
|
out_uint32_le(s, self->crypt_level);
|
|
out_uint32_le(s, 32); /* 32 bytes random len */
|
|
out_uint32_le(s, 0x178); /* 376 bytes rsa info(certificate) len */
|
|
out_uint8a(s, self->server_random, 32);
|
|
/* here to end is certificate */
|
|
/* HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ */
|
|
/* TermService\Parameters\Certificate */
|
|
out_uint32_le(s, 1);
|
|
out_uint32_le(s, 1);
|
|
out_uint32_le(s, 1);
|
|
out_uint16_le(s, SEC_TAG_PUBKEY); /* 0x0006 */
|
|
out_uint16_le(s, 0x011c); /* 284 bytes length of SEC_TAG_PUBKEY */
|
|
out_uint32_le(s, SEC_RSA_MAGIC); /* 0x31415352 'RSA1' */
|
|
out_uint32_le(s, 0x0108); /* 264 bytes modulus len */
|
|
out_uint32_be(s, 0x00080000); /* bit len */
|
|
out_uint32_be(s, 0xff000000); /* data len */
|
|
out_uint8a(s, self->pub_exp, 4); /* pub exp */
|
|
out_uint8a(s, self->pub_mod, 256); /* pub mod */
|
|
out_uint8s(s, 8); /* pad */
|
|
out_uint16_le(s, SEC_TAG_KEYSIG); /* 0x0008 */
|
|
out_uint16_le(s, 72); /* len */
|
|
out_uint8a(s, self->pub_sig, 64); /* pub sig */
|
|
out_uint8s(s, 8); /* pad */
|
|
}
|
|
else if (self->rsa_key_bytes == 0) /* no security */
|
|
{
|
|
g_writeln("xrdp_sec_out_mcs_data: using no security");
|
|
out_uint16_le(s, SEC_TAG_SRV_CRYPT);
|
|
out_uint16_le(s, 12); /* len is 12 */
|
|
out_uint32_le(s, self->crypt_method);
|
|
out_uint32_le(s, self->crypt_level);
|
|
}
|
|
else
|
|
{
|
|
g_writeln("xrdp_sec_out_mcs_data: error");
|
|
}
|
|
/* end certificate */
|
|
s_mark_end(s);
|
|
|
|
gcc_size = (int)(s->end - ud_ptr) | 0x8000;
|
|
gcc_size_ptr[0] = gcc_size >> 8;
|
|
gcc_size_ptr[1] = gcc_size;
|
|
|
|
return 0;
|
|
}
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
static int APP_CC
|
|
xrdp_mcs_send_connect_response(struct xrdp_mcs *self)
|
|
{
|
|
int data_len;
|
|
struct stream *s;
|
|
|
|
DEBUG((" in xrdp_mcs_send_connect_response"));
|
|
make_stream(s);
|
|
init_stream(s, 8192);
|
|
data_len = (int) (self->server_mcs_data->end - self->server_mcs_data->data);
|
|
xrdp_iso_init(self->iso_layer, s);
|
|
//TODO: we should calculate the whole length include MCS_CONNECT_RESPONSE
|
|
xrdp_mcs_ber_out_header(self, s, MCS_CONNECT_RESPONSE,
|
|
data_len > 0x80 ? data_len + 38 : data_len + 36);
|
|
xrdp_mcs_ber_out_header(self, s, BER_TAG_RESULT, 1);
|
|
out_uint8(s, 0);
|
|
xrdp_mcs_ber_out_header(self, s, BER_TAG_INTEGER, 1);
|
|
out_uint8(s, 0);
|
|
xrdp_mcs_out_domain_params(self, s, 22, 3, 0, 0xfff8);
|
|
xrdp_mcs_ber_out_header(self, s, BER_TAG_OCTET_STRING, data_len);
|
|
/* mcs data */
|
|
out_uint8a(s, self->server_mcs_data->data, data_len);
|
|
s_mark_end(s);
|
|
|
|
if (xrdp_iso_send(self->iso_layer, s) != 0)
|
|
{
|
|
free_stream(s);
|
|
DEBUG((" out xrdp_mcs_send_connect_response error"));
|
|
return 1;
|
|
}
|
|
|
|
free_stream(s);
|
|
DEBUG((" out xrdp_mcs_send_connect_response"));
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
int APP_CC
|
|
xrdp_mcs_incoming(struct xrdp_mcs *self)
|
|
{
|
|
int index;
|
|
|
|
DEBUG((" in xrdp_mcs_incoming"));
|
|
|
|
if (xrdp_mcs_recv_connect_initial(self) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/* in xrdp_sec.c */
|
|
if (xrdp_sec_process_mcs_data(self->sec_layer) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (xrdp_mcs_out_gcc_data(self->sec_layer) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (xrdp_mcs_send_connect_response(self) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (xrdp_mcs_recv_edrq(self) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (xrdp_mcs_recv_aurq(self) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (xrdp_mcs_send_aucf(self) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
for (index = 0; index < self->channel_list->count + 2; index++)
|
|
{
|
|
if (xrdp_mcs_recv_cjrq(self) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
if (xrdp_mcs_send_cjcf(self, self->userid,
|
|
self->userid + MCS_USERCHANNEL_BASE + index) != 0)
|
|
{
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
DEBUG((" out xrdp_mcs_incoming"));
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
int APP_CC
|
|
xrdp_mcs_init(struct xrdp_mcs *self, struct stream *s)
|
|
{
|
|
xrdp_iso_init(self->iso_layer, s);
|
|
s_push_layer(s, mcs_hdr, 8);
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
/* Inform the callback that an mcs packet has been sent. This is needed so
|
|
the module can send any high priority mcs packets like audio. */
|
|
static int APP_CC
|
|
xrdp_mcs_call_callback(struct xrdp_mcs *self)
|
|
{
|
|
int rv;
|
|
struct xrdp_session *session;
|
|
|
|
rv = 0;
|
|
/* if there is a callback, call it here */
|
|
session = self->sec_layer->rdp_layer->session;
|
|
|
|
if (session != 0)
|
|
{
|
|
if (session->callback != 0)
|
|
{
|
|
/* in xrdp_wm.c */
|
|
rv = session->callback(session->id, 0x5556, 0, 0, 0, 0);
|
|
}
|
|
else
|
|
{
|
|
g_writeln("in xrdp_mcs_send, session->callback is nil");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
g_writeln("in xrdp_mcs_send, session is nil");
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
int APP_CC
|
|
xrdp_mcs_send(struct xrdp_mcs *self, struct stream *s, int chan)
|
|
{
|
|
int len;
|
|
char *lp;
|
|
//static int max_len = 0;
|
|
|
|
DEBUG((" in xrdp_mcs_send"));
|
|
s_pop_layer(s, mcs_hdr);
|
|
len = (s->end - s->p) - 8;
|
|
|
|
if (len > 8192 * 2)
|
|
{
|
|
g_writeln("error in xrdp_mcs_send, size too big: %d bytes", len);
|
|
}
|
|
|
|
//if (len > max_len)
|
|
//{
|
|
// max_len = len;
|
|
// g_printf("mcs max length is %d\r\n", max_len);
|
|
//}
|
|
//g_printf("mcs length %d max length is %d\r\n", len, max_len);
|
|
//g_printf("mcs length %d\r\n", len);
|
|
out_uint8(s, MCS_SDIN << 2);
|
|
out_uint16_be(s, self->userid);
|
|
out_uint16_be(s, chan);
|
|
out_uint8(s, 0x70);
|
|
|
|
if (len >= 128)
|
|
{
|
|
len = len | 0x8000;
|
|
out_uint16_be(s, len);
|
|
}
|
|
else
|
|
{
|
|
out_uint8(s, len);
|
|
/* move everything up one byte */
|
|
lp = s->p;
|
|
|
|
while (lp < s->end)
|
|
{
|
|
lp[0] = lp[1];
|
|
lp++;
|
|
}
|
|
|
|
s->end--;
|
|
}
|
|
|
|
if (xrdp_iso_send(self->iso_layer, s) != 0)
|
|
{
|
|
DEBUG((" out xrdp_mcs_send error"));
|
|
return 1;
|
|
}
|
|
|
|
/* todo, do we need to call this for every mcs packet,
|
|
maybe every 5 or so */
|
|
if (chan == MCS_GLOBAL_CHANNEL)
|
|
{
|
|
xrdp_mcs_call_callback(self);
|
|
}
|
|
|
|
DEBUG((" out xrdp_mcs_send"));
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Internal help function to close the socket
|
|
* @param self
|
|
*/
|
|
void APP_CC
|
|
close_rdp_socket(struct xrdp_mcs *self)
|
|
{
|
|
if (self->iso_layer != 0)
|
|
{
|
|
if (self->iso_layer->trans != 0)
|
|
{
|
|
trans_shutdown_tls_mode(self->iso_layer->trans);
|
|
g_tcp_close(self->iso_layer->trans->sck);
|
|
self->iso_layer->trans->sck = 0 ;
|
|
g_writeln("xrdp_mcs_disconnect - socket closed");
|
|
return;
|
|
}
|
|
}
|
|
g_writeln("Failed to close socket");
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/* returns error */
|
|
int APP_CC
|
|
xrdp_mcs_disconnect(struct xrdp_mcs *self)
|
|
{
|
|
struct stream *s;
|
|
|
|
DEBUG((" in xrdp_mcs_disconnect"));
|
|
make_stream(s);
|
|
init_stream(s, 8192);
|
|
|
|
if (xrdp_iso_init(self->iso_layer, s) != 0)
|
|
{
|
|
free_stream(s);
|
|
close_rdp_socket(self);
|
|
DEBUG((" out xrdp_mcs_disconnect error - 1"));
|
|
return 1;
|
|
}
|
|
|
|
out_uint8(s, (MCS_DPUM << 2) | 1);
|
|
out_uint8(s, 0x80);
|
|
s_mark_end(s);
|
|
|
|
if (xrdp_iso_send(self->iso_layer, s) != 0)
|
|
{
|
|
free_stream(s);
|
|
close_rdp_socket(self);
|
|
DEBUG((" out xrdp_mcs_disconnect error - 2"));
|
|
return 1;
|
|
}
|
|
|
|
free_stream(s);
|
|
close_rdp_socket(self);
|
|
DEBUG(("xrdp_mcs_disconnect - close sent"));
|
|
return 0;
|
|
}
|