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620 lines
19 KiB
620 lines
19 KiB
/**
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* xrdp: A Remote Desktop Protocol server.
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*
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* Copyright (C) Laxmikant Rashinkar 2013 LK.Rashinkar@gmail.com
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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/*
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* smartcard redirection support
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*/
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#include "os_calls.h"
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#include "smartcard.h"
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#include "log.h"
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#include "irp.h"
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#include "devredir.h"
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#include "smartcard_pcsc.h"
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/*
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* TODO
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*
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* o need to query client for build number and determine whether we should use
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* SCREDIR_VERSION_XP or SCREDIR_VERSION_LONGHORN
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*
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* o need to call scard_release_resources()
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*
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* o why is win 7 sending SCARD_IOCTL_ACCESS_STARTED_EVENT first
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* 0000 00 01 00 00 04 00 00 00 e0 00 09 00 00 00 00 00 ................
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* 0010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
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* 0020 28 b7 9d 02
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*/
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/*
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* Notes:
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*
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* XP and Server 2003 use version SCREDIR_VERSION_XP functions 5 - 58
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* Vista and Server 2008 use version SCREDIR_VERSION_LONGHORN functions 5 - 64
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* if TS Client's build number is >= 4,034 use SCREDIR_VERSION_LONGHORN
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*/
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/* module based logging */
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#define LOG_ERROR 0
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#define LOG_INFO 1
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#define LOG_DEBUG 2
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#ifndef LOG_LEVEL
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#define LOG_LEVEL LOG_DEBUG
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#endif
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#define log_error(_params...) \
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{ \
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g_write("[%10.10u]: SMART_CARD %s: %d : ERROR: ", \
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g_time3(), __func__, __LINE__); \
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g_writeln (_params); \
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}
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#define log_info(_params...) \
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{ \
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if (LOG_INFO <= LOG_LEVEL) \
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{ \
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g_write("[%10.10u]: SMART_CARD %s: %d : ", \
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g_time3(), __func__, __LINE__); \
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g_writeln (_params); \
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} \
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}
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#define log_debug(_params...) \
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{ \
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if (LOG_DEBUG <= LOG_LEVEL) \
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{ \
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g_write("[%10.10u]: SMART_CARD %s: %d : ", \
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g_time3(), __func__, __LINE__); \
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g_writeln (_params); \
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} \
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}
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/* [MS-RDPESC] 3.1.4 */
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#define SCARD_IOCTL_ESTABLISH_CONTEXT 0x00090014 /* EstablishContext */
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#define SCARD_IOCTL_RELEASE_CONTEXT 0x00090018 /* ReleaseContext */
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#define SCARD_IOCTL_IS_VALID_CONTEXT 0x0009001C /* IsValidContext */
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#define SCARD_IOCTL_LIST_READER_GROUPS 0x00090020 /* ListReaderGroups */
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#define SCARD_IOCTL_LIST_READERS_A 0x00090028 /* ListReaders ASCII */
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#define SCARD_IOCTL_LIST_READERS_W 0x0009002C /* ListReaders Wide */
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#define SCARD_IOCTL_INTRODUCE_READER_GROUP 0x00090050 /* IntroduceReaderGroup */
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#define SCARD_IOCTL_FORGET_READER_GROUP 0x00090058 /* ForgetReader */
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#define SCARD_IOCTL_INTRODUCE_READER 0x00090060 /* IntroduceReader */
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#define SCARD_IOCTL_FORGET_READER 0x00090068 /* IntroduceReader */
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#define SCARD_IOCTL_ADD_READER_TO_GROUP 0x00090070 /* AddReaderToGroup */
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#define SCARD_IOCTL_REMOVE_READER_FROM_GROUP 0x00090078 /* RemoveReaderFromGroup */
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#define SCARD_IOCTL_GET_STATUS_CHANGE 0x000900A0 /* GetStatusChangeA */
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#define SCARD_IOCTL_CANCEL 0x000900A8 /* Cancel */
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#define SCARD_IOCTL_CONNECT 0x000900AC /* ConnectA */
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#define SCARD_IOCTL_RECONNECT 0x000900B4 /* Reconnect */
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#define SCARD_IOCTL_DISCONNECT 0x000900B8 /* Disconnect */
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#define SCARD_IOCTL_BEGIN_TRANSACTION 0x000900BC /* BeginTransaction */
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#define SCARD_IOCTL_END_TRANSACTION 0x000900C0 /* EndTransaction */
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#define SCARD_IOCTL_STATE 0x000900C4 /* State */
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#define SCARD_IOCTL_STATUS 0x000900C8 /* StatusA */
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#define SCARD_IOCTL_TRANSMIT 0x000900D0 /* Transmit */
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#define SCARD_IOCTL_CONTROL 0x000900D4 /* Control */
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#define SCARD_IOCTL_GETATTRIB 0x000900D8 /* GetAttrib */
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#define SCARD_IOCTL_SETATTRIB 0x000900DC /* SetAttrib */
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#define SCARD_IOCTL_ACCESS_STARTED_EVENT 0x000900E0 /* SCardAccessStartedEvent */
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#define SCARD_IOCTL_LOCATE_CARDS_BY_ATR 0x000900E8 /* LocateCardsByATR */
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/* scope used in EstablishContextCall */
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#define SCARD_SCOPE_USER 0x00000000
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#define SCARD_SCOPE_TERMINAL 0x00000001
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#define SCARD_SCOPE_SYSTEM 0x00000002
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#define MAX_SMARTCARDS 16
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/* stores info about a smart card */
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typedef struct smartcard
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{
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tui32 DeviceId;
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char Context[16]; /* opaque context; save as passed to us */
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int Context_len; /* Context len in bytes */
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} SMARTCARD;
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SMARTCARD *smartcards[MAX_SMARTCARDS];
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int g_smartcards_inited = 0;
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extern tui32 g_completion_id;
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extern int g_rdpdr_chan_id; /* in chansrv.c */
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/* forward declarations specific to this file */
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static void scard_send_EstablishContext(IRP *irp, int scope);
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static void scard_send_ListReaders(IRP *irp, int wide);
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static struct stream *scard_make_new_ioctl(IRP *irp, tui32 ioctl);
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static int scard_add_new_device(tui32 device_id);
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static int scard_get_free_slot(void);
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static void scard_release_resources(void);
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static tui32 g_device_id = 0;
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static int g_scard_index = 0;
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/*****************************************************************************/
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int APP_CC
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scard_send_irp_establish_context(struct trans *con, int scope)
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{
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IRP *irp;
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if ((irp = devredir_irp_new()) == NULL)
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{
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log_error("system out of memory");
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return 1;
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}
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irp->scard_index = g_scard_index;
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irp->CompletionId = g_completion_id++;
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irp->DeviceId = g_device_id;
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irp->callback = scard_handle_EstablishContext_Return;
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irp->user_data = con;
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scard_send_EstablishContext(irp, scope);
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log_debug("leaving");
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return 0;
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}
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/*****************************************************************************/
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int APP_CC
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scard_send_irp_list_readers(struct trans *con)
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{
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IRP *irp;
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if ((irp = devredir_irp_new()) == NULL)
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{
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log_error("system out of memory");
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return 1;
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}
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irp->scard_index = g_scard_index;
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irp->CompletionId = g_completion_id++;
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irp->DeviceId = g_device_id;
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irp->callback = scard_handle_ListReaders_Return;
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irp->user_data = con;
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scard_send_ListReaders(irp, 1);
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log_debug("leaving");
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return 0;
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}
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/******************************************************************************
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** non static functions **
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******************************************************************************/
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void APP_CC
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scard_device_announce(tui32 device_id)
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{
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log_debug("entered: device_id=%d", device_id);
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if (g_smartcards_inited)
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{
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return;
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}
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g_memset(&smartcards, 0, sizeof(smartcards));
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g_smartcards_inited = 1;
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g_device_id = device_id;
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g_scard_index = scard_add_new_device(device_id);
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if (g_scard_index < 0)
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{
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log_debug("scard_add_new_device failed with DeviceId=%d", g_device_id);
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}
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else
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{
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log_debug("added smartcard with DeviceId=%d to list", g_device_id);
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}
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//scard_send_establish_context();
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}
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/******************************************************************************
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** callbacks into this module **
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******************************************************************************/
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void APP_CC
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scard_handle_EstablishContext_Return(struct stream *s, IRP *irp,
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tui32 DeviceId, tui32 CompletionId,
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tui32 IoStatus)
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{
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tui32 len;
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int tmp;
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SMARTCARD *sc;
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log_debug("entered");
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/* sanity check */
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if ((DeviceId != irp->DeviceId) || (CompletionId != irp->CompletionId))
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{
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log_error("DeviceId/CompletionId do not match those in IRP");
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return;
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}
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if (IoStatus != 0)
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{
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log_error("failed to establish context - device not usable");
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/* LK_TODO delete irp and smartcard entry */
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return;
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}
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sc = smartcards[irp->scard_index];
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/* get OutputBufferLen */
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xstream_rd_u32_le(s, len);
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/* LK_TODO */
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g_hexdump(s->p, len);
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xstream_rd_u32_le(s, tmp); /* should be len 8, LE, V1 */
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xstream_rd_u32_le(s, tmp); /* marshalling flag */
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xstream_rd_u32_le(s, tmp); /* ?? */
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xstream_rd_u32_le(s, tmp); /* ?? */
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xstream_rd_u32_le(s, tmp); /* ?? */
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xstream_rd_u32_le(s, tmp); /* ?? */
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xstream_rd_u32_le(s, tmp); /* ?? */
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xstream_rd_u32_le(s, len); /* len of context in bytes */
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sc->Context_len = len;
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xstream_copyout(sc->Context, s, len);
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if (LOG_LEVEL == LOG_DEBUG)
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{
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log_debug("dumping context (%d bytes)", sc->Context_len);
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g_hexdump(sc->Context, sc->Context_len);
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}
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//irp->callback = scard_handle_ListReaders_Return;
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//scard_send_ListReaders(irp, 1);
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scard_function_establish_context_return((struct trans *) (irp->user_data),
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((int*)(sc->Context))[0]);
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devredir_irp_delete(irp);
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/* LK_TODO need to delete IRP */
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log_debug("leaving");
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}
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/******************************************************************************/
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void APP_CC
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scard_handle_ListReaders_Return(struct stream *s, IRP *irp,
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tui32 DeviceId, tui32 CompletionId,
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tui32 IoStatus)
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{
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tui32 len;
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log_debug("entered");
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/* sanity check */
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if ((DeviceId != irp->DeviceId) || (CompletionId != irp->CompletionId))
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{
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log_error("DeviceId/CompletionId do not match those in IRP");
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return;
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}
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if (IoStatus != 0)
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{
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log_error("failed to list readers - device not usable");
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/* LK_TODO delete irp and smartcard entry */
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return;
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}
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/* get OutputBufferLen */
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xstream_rd_u32_le(s, len);
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scard_function_get_readers_state_return((struct trans *) (irp->user_data),
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s, len);
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/* LK_TODO */
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//log_debug("dumping %d bytes", len);
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//g_hexdump(s->p, len);
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log_debug("leaving");
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}
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/******************************************************************************
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** static functions local to this file **
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******************************************************************************/
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/**
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*
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*****************************************************************************/
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static void APP_CC
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scard_send_EstablishContext(IRP *irp, int scope)
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{
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struct stream *s;
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int bytes;
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if ((s = scard_make_new_ioctl(irp, SCARD_IOCTL_ESTABLISH_CONTEXT)) == NULL)
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{
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log_error("scard_make_new_ioctl failed");
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return;
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}
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xstream_wr_u32_le(s, 0x08); /* len */
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xstream_wr_u32_le(s, 0); /* unused */
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xstream_wr_u32_le(s, scope); /* Ioctl specific data */
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xstream_wr_u32_le(s, 0); /* don't know what this is, */
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/* but Win7 is sending it */
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/* get stream len */
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bytes = xstream_len(s);
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/* InputBufferLength is number of bytes AFTER 20 byte padding */
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*(s->data + 28) = bytes - 56;
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/* send to client */
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send_channel_data(g_rdpdr_chan_id, s->data, bytes);
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xstream_free(s);
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}
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/**
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*
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*****************************************************************************/
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static void APP_CC
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scard_send_ListReaders(IRP *irp, int wide)
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{
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/* see [MS-RDPESC] 2.2.2.4 */
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SMARTCARD *sc;
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struct stream *s;
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int bytes;
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tui32 ioctl;
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if ((sc = smartcards[irp->scard_index]) == NULL)
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{
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log_error("smartcards[%d] is NULL", irp->scard_index);
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return;
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}
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ioctl = (wide > 0) ? SCARD_IOCTL_LIST_READERS_W :
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SCARD_IOCTL_LIST_READERS_A;
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if ((s = scard_make_new_ioctl(irp, ioctl)) == NULL)
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return;
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xstream_wr_u32_le(s, 72); /* number of bytes to follow */
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xstream_seek(s, 0x1c); /* freerdp does not use this */
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/* insert context */
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xstream_wr_u32_le(s, sc->Context_len);
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xstream_copyin(s, sc->Context, sc->Context_len);
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xstream_wr_u32_le(s, 36); /* length of mszGroups */
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xstream_wr_u16_le(s, 0x0053);
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xstream_wr_u16_le(s, 0x0043);
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xstream_wr_u16_le(s, 0x0061);
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xstream_wr_u16_le(s, 0x0072);
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xstream_wr_u16_le(s, 0x0064);
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xstream_wr_u16_le(s, 0x0024);
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xstream_wr_u16_le(s, 0x0041);
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xstream_wr_u16_le(s, 0x006c);
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xstream_wr_u16_le(s, 0x006c);
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xstream_wr_u16_le(s, 0x0052);
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xstream_wr_u16_le(s, 0x0065);
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xstream_wr_u16_le(s, 0x0061);
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xstream_wr_u16_le(s, 0x0064);
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xstream_wr_u16_le(s, 0x0065);
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xstream_wr_u16_le(s, 0x0072);
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xstream_wr_u16_le(s, 0x0073);
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xstream_wr_u32_le(s, 0x00);
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/* get stream len */
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bytes = xstream_len(s);
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/* InputBufferLength is number of bytes AFTER 20 byte padding */
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*(s->data + 28) = bytes - 56;
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/* send to client */
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send_channel_data(g_rdpdr_chan_id, s->data, bytes);
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xstream_free(s);
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/*
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scard_device_control: dumping 120 bytes of data
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0000 00 08 00 00 58 00 00 00 2c 00 09 00 00 00 00 00 ....X...,.......
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0010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
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0020 01 10 08 00 cc cc cc cc 48 00 00 00 00 00 00 00 ........H.......
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0030 04 00 00 00 00 00 02 00 24 00 00 00 04 00 02 00 ........$.......
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0040 00 00 00 00 ff ff ff ff 04 00 00 00 84 db 03 01 ................
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0050 24 00 00 00 53 00 43 00 61 00 72 00 64 00 24 00 $...S.C.a.r.d.$.
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0060 41 00 6c 00 6c 00 52 00 65 00 61 00 64 00 65 00 A.l.l.R.e.a.d.e.
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0070 72 00 73 00 00 00 00 00 r.s.....
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scard_device_control: output_len=2048 input_len=88 ioctl_code=0x9002c
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*/
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/*
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scard_device_control: dumping 120 bytes of data
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0000 00 08 00 00 80 00 00 00 14 00 09 00 00 00 00 00 ................
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0010 2e 2e 00 00 00 00 00 00 02 00 00 00 00 00 00 00 ................
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0020 01 10 08 00 cc cc cc cc 48 00 00 00 00 00 00 00 ........H.......
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0030 02 00 00 00 00 00 00 00 72 64 00 00 00 00 00 00 ........rd......
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0040 81 27 00 00 00 00 00 00 04 00 00 00 84 b3 03 01 .'..............
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0050 24 00 00 00 53 00 43 00 61 00 72 00 64 00 24 00 $...S.C.a.r.d.$.
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0060 41 00 6c 00 6c 00 52 00 65 00 61 00 64 00 65 00 A.l.l.R.e.a.d.e.
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0070 72 00 73 00 00 00 00 00 r.s.....
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scard_device_control: output_len=2048 input_len=128 ioctl_code=0x90014
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*/
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}
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/**
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* Crate a new stream and insert specified IOCTL
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*
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* @param irp information about the I/O
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* @param ioctl the IOCTL code
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*
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* @return stream with IOCTL inserted in it, NULL on error
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*****************************************************************************/
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static struct stream * APP_CC
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scard_make_new_ioctl(IRP *irp, tui32 ioctl)
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{
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/*
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* format of device control request
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*
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* DeviceIoRequest
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* u16 RDPDR_CTYP_CORE
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* u16 PAKID_CORE_DEVICE_IOREQUEST
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* u32 DeviceId
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* u32 FileId
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* u32 CompletionId
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* u32 MajorFunction
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* u32 MinorFunction
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*
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* u32 OutputBufferLength SHOULD be 2048
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* u32 InputBufferLength
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* u32 IoControlCode
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* 20 bytes padding
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* xx bytes InputBuffer (variable)
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*/
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struct stream *s;
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xstream_new(s, 1024 * 3);
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if (s == NULL)
|
|
{
|
|
log_error("system out of memory");
|
|
return s;
|
|
}
|
|
|
|
devredir_insert_DeviceIoRequest(s,
|
|
irp->DeviceId,
|
|
irp->FileId,
|
|
irp->CompletionId,
|
|
IRP_MJ_DEVICE_CONTROL,
|
|
0);
|
|
|
|
xstream_wr_u32_le(s, 2048); /* OutputBufferLength */
|
|
xstream_wr_u32_le(s, 0); /* InputBufferLength - insert later */
|
|
xstream_wr_u32_le(s, ioctl); /* Ioctl Code */
|
|
xstream_seek(s, 20); /* padding */
|
|
|
|
/* [MS-RPCE] 2.2.6.1 */
|
|
xstream_wr_u32_le(s, 0x00081001); /* len 8, LE, v1 */
|
|
xstream_wr_u32_le(s, 0xcccccccc); /* filler */
|
|
|
|
return s;
|
|
}
|
|
|
|
/**
|
|
* Create a new smart card device entry and insert it into smartcards[]
|
|
*
|
|
* @param device_id DeviceId of new card
|
|
*
|
|
* @return index into smartcards[] on success, -1 on failure
|
|
*****************************************************************************/
|
|
|
|
static int APP_CC
|
|
scard_add_new_device(tui32 device_id)
|
|
{
|
|
int index;
|
|
SMARTCARD *sc;
|
|
|
|
if ((index = scard_get_free_slot()) < 0)
|
|
{
|
|
log_error("scard_get_free_slot failed");
|
|
return -1;
|
|
}
|
|
|
|
if ((sc = g_malloc(sizeof(SMARTCARD), 1)) == NULL)
|
|
{
|
|
log_error("system out of memory");
|
|
return -1;
|
|
}
|
|
|
|
sc->DeviceId = device_id;
|
|
smartcards[index] = sc;
|
|
|
|
return index;
|
|
}
|
|
|
|
/**
|
|
* Find first unused entry in smartcards
|
|
*
|
|
* @return index of first unused entry in smartcards or -1 if smartcards
|
|
* is full
|
|
*****************************************************************************/
|
|
|
|
static int APP_CC
|
|
scard_get_free_slot(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_SMARTCARDS; i++)
|
|
{
|
|
if (smartcards[i] == NULL)
|
|
{
|
|
log_debug("found free slot at index %d", i);
|
|
return i;
|
|
}
|
|
}
|
|
|
|
log_error("too many smart card devices; rejecting this one");
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Release resources prior to shutting down
|
|
*****************************************************************************/
|
|
|
|
static void APP_CC
|
|
scard_release_resources(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_SMARTCARDS; i++)
|
|
{
|
|
if (smartcards[i] != NULL)
|
|
{
|
|
g_free(smartcards[i]);
|
|
smartcards[i] = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
*
|
|
*****************************************************************************/
|
|
int APP_CC
|
|
scard_get_wait_objs(tbus *objs, int *count, int *timeout)
|
|
{
|
|
return scard_pcsc_get_wait_objs(objs, count, timeout);
|
|
}
|
|
|
|
/**
|
|
*
|
|
*****************************************************************************/
|
|
int APP_CC
|
|
scard_check_wait_objs(void)
|
|
{
|
|
return scard_pcsc_check_wait_objs();
|
|
}
|
|
|
|
/**
|
|
*
|
|
*****************************************************************************/
|
|
int APP_CC
|
|
scard_init(void)
|
|
{
|
|
log_debug("init")
|
|
return scard_pcsc_init();
|
|
}
|
|
|
|
/**
|
|
*
|
|
*****************************************************************************/
|
|
int APP_CC
|
|
scard_deinit(void)
|
|
{
|
|
log_debug("deinit")
|
|
return scard_pcsc_deinit();
|
|
}
|