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xrdp-proprietary/sesman/chansrv/smartcard_pcsc.c

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/**
* xrdp: A Remote Desktop Protocol server.
*
* Copyright (C) Jay Sorg 2013 jay.sorg@gmail.com
*
* 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.
*
*/
/*
* smartcard redirection support, PCSC daemon standin
* this will act like pcsc daemon
* pcsc lib and daemon write struct on unix domain socket for communication
*/
#define JAY_TODO_CONTEXT 0
#define JAY_TODO_WIDE 1
#define PCSC_STANDIN 1
#include "os_calls.h"
#include "smartcard.h"
#include "log.h"
#include "irp.h"
#include "devredir.h"
#include "trans.h"
#include "chansrv.h"
#if PCSC_STANDIN
#define LLOG_LEVEL 11
#define LLOGLN(_level, _args) \
do \
{ \
if (_level < LLOG_LEVEL) \
{ \
g_write("chansrv:smartcard_pcsc [%10.10u]: ", g_time3()); \
g_writeln _args ; \
} \
} \
while (0)
#define XRDP_PCSC_STATE_NONE 0
#define XRDP_PCSC_STATE_GOT_EC (1 << 0) /* establish context */
#define XRDP_PCSC_STATE_GOT_LR (1 << 1) /* list readers */
#define XRDP_PCSC_STATE_GOT_RC (1 << 2) /* release context */
#define XRDP_PCSC_STATE_GOT_GSC (1 << 3) /* get status change */
#define XRDP_PCSC_STATE_GOT_C (1 << 4) /* connect */
/* TODO: put this in con */
static int g_xrdp_pcsc_state = XRDP_PCSC_STATE_NONE;
extern int g_display_num; /* in chansrv.c */
/*****************************************************************************/
struct pcsc_client
{
struct trans *con;
};
static struct pcsc_client *g_head = 0;
static struct pcsc_client *g_tail = 0;
static struct trans *g_lis = 0;
static struct trans *g_con = 0; /* todo, remove this */
static char g_pcsclite_ipc_dir[256] = "";
static int g_pub_file_fd = 0;
/*****************************************************************************/
int APP_CC
scard_pcsc_get_wait_objs(tbus *objs, int *count, int *timeout)
{
LLOGLN(0, ("scard_pcsc_get_wait_objs"));
if (g_lis != 0)
{
trans_get_wait_objs(g_lis, objs, count);
}
if (g_con != 0)
{
trans_get_wait_objs(g_con, objs, count);
}
return 0;
}
/*****************************************************************************/
int APP_CC
scard_pcsc_check_wait_objs(void)
{
LLOGLN(0, ("scard_pcsc_check_wait_objs"));
if (g_lis != 0)
{
trans_check_wait_objs(g_lis);
}
if (g_con != 0)
{
trans_check_wait_objs(g_con);
}
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
scard_process_establish_context(struct trans *con, struct stream *in_s)
{
int dwScope;
LLOGLN(0, ("scard_process_establish_context:"));
if (g_xrdp_pcsc_state & XRDP_PCSC_STATE_GOT_EC)
{
LLOGLN(0, ("scard_process_establish_context: opps"));
return 1;
}
g_xrdp_pcsc_state |= XRDP_PCSC_STATE_GOT_EC;
in_uint32_le(in_s, dwScope);
LLOGLN(0, ("scard_process_establish_context: dwScope 0x%8.8x", dwScope));
scard_send_establish_context(con, dwScope);
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
scard_function_establish_context_return(struct trans *con,
struct stream *in_s,
int len)
{
int bytes;
tui32 context;
tui32 context_len;
struct stream *out_s;
LLOGLN(0, ("scard_function_establish_context_return:"));
if ((g_xrdp_pcsc_state & XRDP_PCSC_STATE_GOT_EC) == 0)
{
LLOGLN(0, ("scard_function_establish_context_return: opps"));
return 1;
}
g_xrdp_pcsc_state &= ~XRDP_PCSC_STATE_GOT_EC;
in_uint8s(in_s, 28);
in_uint32_le(in_s, context_len);
if (context_len != 4)
{
LLOGLN(0, ("scard_function_establish_context_return: opps"));
return 1;
}
in_uint32_le(in_s, context);
LLOGLN(0, ("scard_function_establish_context_return: context 0x%8.8x", context));
out_s = trans_get_out_s(con, 8192);
s_push_layer(out_s, iso_hdr, 8);
out_uint32_le(out_s, context);
out_uint32_le(out_s, 0); /* SCARD_S_SUCCESS status */
s_mark_end(out_s);
bytes = (int) (out_s->end - out_s->data);
s_pop_layer(out_s, iso_hdr);
out_uint32_le(out_s, bytes - 8);
out_uint32_le(out_s, 0x01); /* SCARD_ESTABLISH_CONTEXT 0x01 */
return trans_force_write(con);
}
/*****************************************************************************/
/* returns error */
int APP_CC
scard_process_release_context(struct trans *con, struct stream *in_s)
{
int hContext;
LLOGLN(0, ("scard_process_release_context:"));
if (g_xrdp_pcsc_state & XRDP_PCSC_STATE_GOT_RC)
{
LLOGLN(0, ("scard_process_establish_context: opps"));
return 1;
}
g_xrdp_pcsc_state |= XRDP_PCSC_STATE_GOT_RC;
in_uint32_le(in_s, hContext);
LLOGLN(0, ("scard_process_release_context: hContext 0x%8.8x", hContext));
scard_send_release_context(con, hContext);
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
scard_function_release_context_return(struct trans *con,
struct stream *in_s,
int len)
{
int bytes;
struct stream *out_s;
tui32 context;
LLOGLN(0, ("scard_function_release_context_return:"));
if ((g_xrdp_pcsc_state & XRDP_PCSC_STATE_GOT_RC) == 0)
{
LLOGLN(0, ("scard_function_release_context_return: opps"));
return 1;
}
g_xrdp_pcsc_state &= ~XRDP_PCSC_STATE_GOT_RC;
out_s = trans_get_out_s(con, 8192);
s_push_layer(out_s, iso_hdr, 8);
out_uint32_le(out_s, 0); /* SCARD_S_SUCCESS status */
s_mark_end(out_s);
bytes = (int) (out_s->end - out_s->data);
s_pop_layer(out_s, iso_hdr);
out_uint32_le(out_s, bytes - 8);
out_uint32_le(out_s, 0x02); /* SCARD_RELEASE_CONTEXT 0x02 */
return trans_force_write(con);
}
/*****************************************************************************/
/* returns error */
int APP_CC
scard_process_list_readers(struct trans *con, struct stream *in_s)
{
int hContext;
LLOGLN(0, ("scard_process_list_readers:"));
if (g_xrdp_pcsc_state & XRDP_PCSC_STATE_GOT_LR)
{
LLOGLN(0, ("scard_process_list_readers: opps"));
return 1;
}
g_xrdp_pcsc_state |= XRDP_PCSC_STATE_GOT_LR;
in_uint32_le(in_s, hContext);
LLOGLN(0, ("scard_process_list_readers: dwScope 0x%8.8x", hContext));
scard_send_list_readers(con, hContext, 1);
return 0;
}
/*****************************************************************************/
int APP_CC
scard_function_list_readers_return(struct trans *con,
struct stream *in_s,
int len)
{
struct stream *out_s;
int chr;
int readers;
int rn_index;
int index;
int bytes;
twchar reader_name[100];
char lreader_name[16][100];
LLOGLN(10, ("scard_function_list_readers_return:"));
g_hexdump(in_s->p, len);
if ((g_xrdp_pcsc_state & XRDP_PCSC_STATE_GOT_LR) == 0)
{
LLOGLN(10, ("scard_function_list_readers_return: opps"));
return 1;
}
g_xrdp_pcsc_state &= ~XRDP_PCSC_STATE_GOT_LR;
g_memset(reader_name, 0, sizeof(reader_name));
g_memset(lreader_name, 0, sizeof(lreader_name));
in_uint8s(in_s, 28);
len -= 28;
in_uint32_le(in_s, len);
g_writeln("len %d", len);
rn_index = 0;
readers = 0;
while (len > 0)
{
in_uint16_le(in_s, chr);
len -= 2;
if (chr == 0)
{
if (reader_name[0] != 0)
{
g_wcstombs(lreader_name[readers], reader_name, 99);
g_writeln("1 %s", lreader_name[readers]);
g_memset(reader_name, 0, sizeof(reader_name));
readers++;
}
reader_name[0] = 0;
rn_index = 0;
}
else
{
reader_name[rn_index] = chr;
rn_index++;
}
}
if (rn_index > 0)
{
if (reader_name[0] != 0)
{
g_wcstombs(lreader_name[readers], reader_name, 99);
g_writeln("2 %s", lreader_name[readers]);
g_memset(reader_name, 0, sizeof(reader_name));
readers++;
}
}
out_s = trans_get_out_s(con, 8192);
s_push_layer(out_s, iso_hdr, 8);
out_uint32_le(out_s, readers);
for (index = 0; index < readers; index++)
{
g_writeln("3 - %s", lreader_name[index]);
out_uint8a(out_s, lreader_name[index], 100);
}
out_uint32_le(out_s, 0); /* SCARD_S_SUCCESS status */
s_mark_end(out_s);
bytes = (int) (out_s->end - out_s->data);
s_pop_layer(out_s, iso_hdr);
out_uint32_le(out_s, bytes - 8);
out_uint32_le(out_s, 0x03); /* SCARD_LIST_READERS 0x03 */
return trans_force_write(con);
}
/*****************************************************************************/
/* returns error */
int APP_CC
scard_process_connect(struct trans *con, struct stream *in_s)
{
int hContext;
char szReader[100];
READER_STATE rs;
LLOGLN(0, ("scard_process_connect:"));
if (g_xrdp_pcsc_state & XRDP_PCSC_STATE_GOT_C)
{
LLOGLN(0, ("scard_process_connect: opps"));
return 1;
}
g_memset(&rs, 0, sizeof(rs));
g_xrdp_pcsc_state |= XRDP_PCSC_STATE_GOT_C;
in_uint32_le(in_s, hContext);
in_uint8a(in_s, szReader, 100);
in_uint32_le(in_s, rs.shared_mode_flag);
in_uint32_le(in_s, rs.preferred_protocol);
LLOGLN(0, ("scard_process_connect: dwShareMode 0x%8.8x "
"dwPreferredProtocols 0x%8.8x", rs.shared_mode_flag,
rs.preferred_protocol));
scard_send_connect(con, hContext, 1, &rs);
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
scard_process_get_status_change(struct trans *con, struct stream *in_s)
{
int index;
int hContext;
int dwTimeout;
int cReaders;
READER_STATE *rsa;
LLOGLN(0, ("scard_process_get_status_change:"));
if (g_xrdp_pcsc_state & XRDP_PCSC_STATE_GOT_GSC)
{
LLOGLN(0, ("scard_process_get_status_change: opps"));
return 1;
}
in_uint32_le(in_s, hContext);
in_uint32_le(in_s, dwTimeout);
in_uint32_le(in_s, cReaders);
if ((cReaders < 0) || (cReaders > 16))
{
LLOGLN(0, ("scard_process_get_status_change: bad cReaders %d", cReaders));
return 1;
}
rsa = (READER_STATE *) g_malloc(sizeof(READER_STATE) * cReaders, 1);
for (index = 0; index < cReaders; index++)
{
in_uint8a(in_s, rsa[index].reader_name, 100);
LLOGLN(10, ("scard_process_get_status_change: reader_name %s",
rsa[index].reader_name));
in_uint32_le(in_s, rsa[index].current_state);
LLOGLN(10, ("scard_process_get_status_change: current_state %d",
rsa[index].current_state));
in_uint32_le(in_s, rsa[index].event_state);
LLOGLN(10, ("scard_process_get_status_change: event_state %d",
rsa[index].event_state));
in_uint32_le(in_s, rsa[index].atr_len);
LLOGLN(10, ("scard_process_get_status_change: atr_len %d",
rsa[index].atr_len));
in_uint8a(in_s, rsa[index].atr, 36);
}
LLOGLN(0, ("scard_process_get_status_change: hContext 0x%8.8x dwTimeout "
"%d cReaders %d", hContext, dwTimeout, cReaders));
g_xrdp_pcsc_state |= XRDP_PCSC_STATE_GOT_GSC;
scard_send_get_status_change(con, hContext, 1, dwTimeout, cReaders, rsa);
g_free(rsa);
return 0;
}
/*****************************************************************************/
int APP_CC
scard_function_get_status_change_return(struct trans *con,
struct stream *in_s,
int len)
{
int bytes;
int index;
int cReaders;
tui32 current_state;
tui32 event_state;
tui32 atr_len; /* number of bytes in atr[] */
tui8 atr[36];
struct stream *out_s;
LLOGLN(0, ("scard_function_get_status_change_return:"));
g_hexdump(in_s->p, len);
if ((g_xrdp_pcsc_state & XRDP_PCSC_STATE_GOT_GSC) == 0)
{
LLOGLN(0, ("scard_function_establish_context_return: opps"));
return 1;
}
g_xrdp_pcsc_state &= ~XRDP_PCSC_STATE_GOT_GSC;
in_uint8s(in_s, 28);
in_uint32_le(in_s, cReaders);
if (cReaders > 0)
{
out_s = trans_get_out_s(con, 8192);
s_push_layer(out_s, iso_hdr, 8);
out_uint32_le(out_s, cReaders);
for (index = 0; index < cReaders; index++)
{
in_uint32_le(in_s, current_state);
out_uint32_le(out_s, current_state);
in_uint32_le(in_s, event_state);
out_uint32_le(out_s, event_state);
in_uint32_le(in_s, atr_len);
out_uint32_le(out_s, atr_len);
in_uint8a(in_s, atr, 36);
out_uint8a(out_s, atr, 36);
}
out_uint32_le(out_s, 0); /* SCARD_S_SUCCESS status */
s_mark_end(out_s);
bytes = (int) (out_s->end - out_s->data);
s_pop_layer(out_s, iso_hdr);
out_uint32_le(out_s, bytes - 8);
out_uint32_le(out_s, 0x0C); /* SCARD_ESTABLISH_CONTEXT 0x0C */
return trans_force_write(con);
}
return 0;
}
/*****************************************************************************/
/* returns error */
int APP_CC
scard_process_msg(struct trans *con, struct stream *in_s, int command)
{
int rv;
LLOGLN(0, ("scard_process_msg: command 0x%4.4x", command));
rv = 0;
switch (command)
{
case 0x01: /* SCARD_ESTABLISH_CONTEXT */
LLOGLN(0, ("scard_process_msg: SCARD_ESTABLISH_CONTEXT"));
rv = scard_process_establish_context(con, in_s);
break;
case 0x02: /* SCARD_RELEASE_CONTEXT */
LLOGLN(0, ("scard_process_msg: SCARD_RELEASE_CONTEXT"));
rv = scard_process_release_context(con, in_s);
break;
case 0x03: /* SCARD_LIST_READERS */
LLOGLN(0, ("scard_process_msg: SCARD_LIST_READERS"));
rv = scard_process_list_readers(con, in_s);
break;
case 0x04: /* SCARD_CONNECT */
LLOGLN(0, ("scard_process_msg: SCARD_CONNECT"));
rv = scard_process_connect(con, in_s);
break;
case 0x05: /* SCARD_RECONNECT */
LLOGLN(0, ("scard_process_msg: SCARD_RECONNECT"));
break;
case 0x06: /* SCARD_DISCONNECT */
LLOGLN(0, ("scard_process_msg: SCARD_DISCONNECT"));
break;
case 0x07: /* SCARD_BEGIN_TRANSACTION */
LLOGLN(0, ("scard_process_msg: SCARD_BEGIN_TRANSACTION"));
break;
case 0x08: /* SCARD_END_TRANSACTION */
LLOGLN(0, ("scard_process_msg: SCARD_END_TRANSACTION"));
break;
case 0x09: /* SCARD_TRANSMIT */
LLOGLN(0, ("scard_process_msg: SCARD_TRANSMIT"));
break;
case 0x0A: /* SCARD_CONTROL */
LLOGLN(0, ("scard_process_msg: SCARD_CONTROL"));
break;
case 0x0B: /* SCARD_STATUS */
LLOGLN(0, ("scard_process_msg: SCARD_STATUS"));
break;
case 0x0C: /* SCARD_GET_STATUS_CHANGE */
LLOGLN(0, ("scard_process_msg: SCARD_GET_STATUS_CHANGE"));
rv = scard_process_get_status_change(con, in_s);
break;
case 0x0D: /* SCARD_CANCEL */
LLOGLN(0, ("scard_process_msg: SCARD_CANCEL"));
break;
case 0x0E: /* SCARD_CANCEL_TRANSACTION */
LLOGLN(0, ("scard_process_msg: SCARD_CANCEL_TRANSACTION"));
break;
case 0x0F: /* SCARD_GET_ATTRIB */
LLOGLN(0, ("scard_process_msg: SCARD_GET_ATTRIB"));
break;
case 0x10: /* SCARD_SET_ATTRIB */
LLOGLN(0, ("scard_process_msg: SCARD_SET_ATTRIB"));
break;
default:
LLOGLN(0, ("scard_process_msg: unknown mtype 0x%4.4x", command));
rv = 1;
break;
}
return rv;
}
/*****************************************************************************/
/* returns error */
int DEFAULT_CC
my_pcsc_trans_data_in(struct trans *trans)
{
struct stream *s;
int id;
int size;
int command;
int error;
LLOGLN(0, ("my_pcsc_trans_data_in:"));
if (trans == 0)
{
return 0;
}
if (trans != g_con)
{
return 1;
}
s = trans_get_in_s(trans);
in_uint32_le(s, size);
in_uint32_le(s, command);
LLOGLN(0, ("my_pcsc_trans_data_in: size %d command %d", size, command));
error = trans_force_read(trans, size);
if (error == 0)
{
error = scard_process_msg(g_con, s, command);
}
return error;
}
/*****************************************************************************/
/* got a new connection from libpcsclite */
int DEFAULT_CC
my_pcsc_trans_conn_in(struct trans *trans, struct trans *new_trans)
{
LLOGLN(0, ("my_pcsc_trans_conn_in:"));
if (trans == 0)
{
return 1;
}
if (trans != g_lis)
{
return 1;
}
if (new_trans == 0)
{
return 1;
}
g_con = new_trans;
g_con->trans_data_in = my_pcsc_trans_data_in;
#if 1
g_con->header_size = 8;
#else
g_con->header_size = RXSHAREDSEGMENT_BYTES;
LLOGLN(0, ("my_pcsc_trans_conn_in: sizeof sharedSegmentMsg is %d",
sizeof(sharedSegmentMsg)));
#endif
return 0;
}
/*****************************************************************************/
int APP_CC
scard_pcsc_init(void)
{
char port[256];
char *home;
int disp;
int error;
int index;
LLOGLN(0, ("scard_pcsc_init:"));
if (g_lis == 0)
{
g_lis = trans_create(2, 8192, 8192);
//g_snprintf(g_pcsclite_ipc_dir, 255, "/tmp/.xrdp/pcsc%d", g_display_num);
home = g_getenv("HOME");
disp = g_display_num;
g_snprintf(g_pcsclite_ipc_dir, 255, "%s/.pcsc%d", home, disp);
if (g_directory_exist(g_pcsclite_ipc_dir))
{
if (g_remove_dir(g_pcsclite_ipc_dir) != 0)
{
LLOGLN(0, ("scard_pcsc_init: g_remove_dir failed"));
}
}
if (!g_create_dir(g_pcsclite_ipc_dir))
{
LLOGLN(0, ("scard_pcsc_init: g_create_dir failed"));
}
g_chmod_hex(g_pcsclite_ipc_dir, 0x1777);
g_snprintf(port, 255, "%s/pcscd.comm", g_pcsclite_ipc_dir);
g_lis->trans_conn_in = my_pcsc_trans_conn_in;
error = trans_listen(g_lis, port);
if (error != 0)
{
LLOGLN(0, ("scard_pcsc_init: trans_listen failed for port %s",
port));
return 1;
}
}
return 0;
}
/*****************************************************************************/
int APP_CC
scard_pcsc_deinit(void)
{
LLOGLN(0, ("scard_pcsc_deinit:"));
if (g_lis != 0)
{
trans_delete(g_lis);
g_lis = 0;
g_file_close(g_pub_file_fd);
g_pub_file_fd = 0;
if (g_remove_dir(g_pcsclite_ipc_dir) != 0)
{
LLOGLN(0, ("scard_pcsc_deinit: g_remove_dir failed"));
}
g_pcsclite_ipc_dir[0] = 0;
}
return 0;
}
#else
int APP_CC
scard_pcsc_get_wait_objs(tbus *objs, int *count, int *timeout)
{
return 0;
}
int APP_CC
scard_pcsc_check_wait_objs(void)
{
return 0;
}
int APP_CC
scard_pcsc_init(void)
{
return 0;
}
int APP_CC
scard_pcsc_deinit(void)
{
return 0;
}
#endif
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