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winscard_clnt.c
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winscard_clnt.c
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/*
* MUSCLE SmartCard Development ( https://pcsclite.apdu.fr/ )
*
* Copyright (C) 1999-2004
* David Corcoran <[email protected]>
* Copyright (C) 2003-2004
* Damien Sauveron <[email protected]>
* Copyright (C) 2005
* Martin Paljak <[email protected]>
* Copyright (C) 2002-2011
* Ludovic Rousseau <[email protected]>
* Copyright (C) 2009
* Jean-Luc Giraud <[email protected]>
*
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. The name of the author may not be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @file
* @defgroup API API
* @brief Handles smart card reader communications and
* forwarding requests over message queues.
*
* Here is exposed the API for client applications.
*
* \anchor differences
* @attention
* Known \ref differences with Microsoft Windows WinSCard implementation:
*
* -# SCardStatus()
* @par
* SCardStatus() returns a bit field on pcsc-lite but a enumeration on
* Windows.
* @par
* This difference may be resolved in a future version of pcsc-lite.
* The bit-fields would then only contain one bit set.
* @par
* You can have a @b portable code using:
* @code
* if (dwState & SCARD_PRESENT)
* {
* // card is present
* }
* @endcode
* -# \ref SCARD_E_UNSUPPORTED_FEATURE
* @par
* Windows may return ERROR_NOT_SUPPORTED instead of
* \ref SCARD_E_UNSUPPORTED_FEATURE
* @par
* This difference will not be corrected. pcsc-lite only uses
* SCARD_E_* error codes.
* -# \ref SCARD_E_UNSUPPORTED_FEATURE
* @par
* For historical reasons the value of \ref SCARD_E_UNSUPPORTED_FEATURE
* is \p 0x8010001F in pcsc-lite but \p 0x80100022 in Windows WinSCard.
* You should not have any problem if you always use the symbolic name.
* @par
* The value \p 0x8010001F is also used for \ref SCARD_E_UNEXPECTED on
* pcsc-lite but \ref SCARD_E_UNEXPECTED is never returned by
* pcsc-lite. So \p 0x8010001F does always mean
* \ref SCARD_E_UNSUPPORTED_FEATURE.
* @par
* Applications like rdesktop that allow a Windows application to
* talk to pcsc-lite should take care of this difference and convert
* the value between the two worlds.
* -# SCardConnect()
* @par
* If \ref SCARD_SHARE_DIRECT is used the reader is accessed in
* shared mode (like with \ref SCARD_SHARE_SHARED) and not in
* exclusive mode (like with \ref SCARD_SHARE_EXCLUSIVE) as on
* Windows.
* -# SCardConnect() & SCardReconnect()
* @par
* pdwActiveProtocol is not set to \ref SCARD_PROTOCOL_UNDEFINED if
* \ref SCARD_SHARE_DIRECT is used but the card has @b already
* negotiated its protocol.
* -# SCardReconnect()
* @par
* Any PC/SC transaction held by the process is still valid after
* SCardReconnect() returned. On Windows the PC/SC transactions are
* released and a new call to SCardBeginTransaction() must be done.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/un.h>
#include <errno.h>
#include <stddef.h>
#include <sys/time.h>
#include <pthread.h>
#include <sys/wait.h>
#include "misc.h"
#include "pcscd.h"
#include "winscard.h"
#include "debuglog.h"
#include "readerfactory.h"
#include "eventhandler.h"
#include "sys_generic.h"
#include "winscard_msg.h"
#include "utils.h"
/* Display, on stderr, a trace of the WinSCard calls with arguments and
* results */
//#define DO_TRACE
/* Profile the execution time of WinSCard calls */
//#define DO_PROFILE
/** used for backward compatibility */
#define SCARD_PROTOCOL_ANY_OLD 0x1000
#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif
static char sharing_shall_block = TRUE;
#define COLOR_RED "\33[01;31m"
#define COLOR_GREEN "\33[32m"
#define COLOR_BLUE "\33[34m"
#define COLOR_MAGENTA "\33[35m"
#define COLOR_NORMAL "\33[0m"
#ifdef DO_TRACE
#include <stdio.h>
#include <stdarg.h>
static void trace(const char *func, const char direction, const char *fmt, ...)
{
va_list args;
fprintf(stderr, COLOR_GREEN "%c " COLOR_BLUE "[%lX] " COLOR_GREEN "%s ",
direction, pthread_self(), func);
fprintf(stderr, COLOR_MAGENTA);
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
fprintf(stderr, COLOR_NORMAL "\n");
}
#define API_TRACE_IN(...) trace(__FUNCTION__, '<', __VA_ARGS__);
#define API_TRACE_OUT(...) trace(__FUNCTION__, '>', __VA_ARGS__);
#else
#define API_TRACE_IN(...)
#define API_TRACE_OUT(...)
#endif
#ifdef DO_PROFILE
#define PROFILE_FILE "/tmp/pcsc_profile"
#include <stdio.h>
#include <sys/time.h>
/* we can profile a maximum of 5 simultaneous calls */
#define MAX_THREADS 5
pthread_t threads[MAX_THREADS];
struct timeval profile_time_start[MAX_THREADS];
FILE *profile_fd;
char profile_tty;
#define PROFILE_START profile_start();
#define PROFILE_END(rv) profile_end(__FUNCTION__, rv);
static void profile_start(void)
{
static char initialized = FALSE;
pthread_t t;
int i;
if (!initialized)
{
char filename[80];
initialized = TRUE;
sprintf(filename, "%s-%d", PROFILE_FILE, getuid());
profile_fd = fopen(filename, "a+");
if (NULL == profile_fd)
{
fprintf(stderr, COLOR_RED "Can't open %s: %s" COLOR_NORMAL "\n",
PROFILE_FILE, strerror(errno));
exit(-1);
}
fprintf(profile_fd, "\nStart a new profile\n");
if (isatty(fileno(stderr)))
profile_tty = TRUE;
else
profile_tty = FALSE;
}
t = pthread_self();
for (i=0; i<MAX_THREADS; i++)
if (pthread_equal(0, threads[i]))
{
threads[i] = t;
break;
}
gettimeofday(&profile_time_start[i], NULL);
} /* profile_start */
static void profile_end(const char *f, LONG rv)
{
struct timeval profile_time_end;
long d;
pthread_t t;
int i;
gettimeofday(&profile_time_end, NULL);
t = pthread_self();
for (i=0; i<MAX_THREADS; i++)
if (pthread_equal(t, threads[i]))
break;
if (i>=MAX_THREADS)
{
fprintf(stderr, COLOR_BLUE " WARNING: no start info for %s\n", f);
return;
}
d = time_sub(&profile_time_end, &profile_time_start[i]);
/* free this entry */
threads[i] = 0;
if (profile_tty)
{
if (rv != SCARD_S_SUCCESS)
fprintf(stderr,
COLOR_RED "RESULT %s " COLOR_MAGENTA "%ld "
COLOR_BLUE "0x%08lX %s" COLOR_NORMAL "\n",
f, d, rv, pcsc_stringify_error(rv));
else
fprintf(stderr, COLOR_RED "RESULT %s " COLOR_MAGENTA "%ld"
COLOR_NORMAL "\n", f, d);
}
fprintf(profile_fd, "%s %ld\n", f, d);
fflush(profile_fd);
} /* profile_end */
#else
#define PROFILE_START
#define PROFILE_END(rv)
#endif
/**
* Represents an Application Context Channel.
* A channel belongs to an Application Context (\c _psContextMap).
*/
struct _psChannelMap
{
SCARDHANDLE hCard;
LPSTR readerName;
};
typedef struct _psChannelMap CHANNEL_MAP;
static int CHANNEL_MAP_seeker(const void *el, const void *key)
{
const CHANNEL_MAP * channelMap = el;
if ((el == NULL) || (key == NULL))
{
Log3(PCSC_LOG_CRITICAL,
"CHANNEL_MAP_seeker called with NULL pointer: el=%p, key=%p",
el, key);
return 0;
}
if (channelMap->hCard == *(SCARDHANDLE *)key)
return 1;
return 0;
}
/**
* @brief Represents an Application Context on the Client side.
*
* An Application Context contains Channels (\c _psChannelMap).
*/
struct _psContextMap
{
DWORD dwClientID; /**< Client Connection ID */
SCARDCONTEXT hContext; /**< Application Context ID */
pthread_mutex_t mMutex; /**< Mutex for this context */
list_t channelMapList;
char cancellable; /**< We are in a cancellable call */
};
/**
* @brief Represents an Application Context on the Client side.
*
* typedef of _psContextMap
*/
typedef struct _psContextMap SCONTEXTMAP;
static list_t contextMapList;
static int SCONTEXTMAP_seeker(const void *el, const void *key)
{
const SCONTEXTMAP * contextMap = el;
if ((el == NULL) || (key == NULL))
{
Log3(PCSC_LOG_CRITICAL,
"SCONTEXTMAP_seeker called with NULL pointer: el=%p, key=%p",
el, key);
return 0;
}
if (contextMap->hContext == *(SCARDCONTEXT *) key)
return 1;
return 0;
}
/**
* Make sure the initialization code is executed only once.
*/
static short isExecuted = 0;
/**
* Ensure that some functions be accessed in thread-safe mode.
* These function's names finishes with "TH".
*/
static pthread_mutex_t clientMutex = PTHREAD_MUTEX_INITIALIZER;
/**
* Area used to read status information about the readers.
*/
static READER_STATE readerStates[PCSCLITE_MAX_READERS_CONTEXTS];
/** Protocol Control Information for T=0 */
PCSC_API const SCARD_IO_REQUEST g_rgSCardT0Pci = { SCARD_PROTOCOL_T0, sizeof(SCARD_IO_REQUEST) };
/** Protocol Control Information for T=1 */
PCSC_API const SCARD_IO_REQUEST g_rgSCardT1Pci = { SCARD_PROTOCOL_T1, sizeof(SCARD_IO_REQUEST) };
/** Protocol Control Information for raw access */
PCSC_API const SCARD_IO_REQUEST g_rgSCardRawPci = { SCARD_PROTOCOL_RAW, sizeof(SCARD_IO_REQUEST) };
static LONG SCardAddContext(SCARDCONTEXT, DWORD);
static SCONTEXTMAP * SCardGetAndLockContext(SCARDCONTEXT);
static SCONTEXTMAP * SCardGetContextTH(SCARDCONTEXT);
static void SCardRemoveContext(SCARDCONTEXT);
static void SCardCleanContext(SCONTEXTMAP *);
static LONG SCardAddHandle(SCARDHANDLE, SCONTEXTMAP *, LPCSTR);
static LONG SCardGetContextChannelAndLockFromHandle(SCARDHANDLE,
/*@out@*/ SCONTEXTMAP * *, /*@out@*/ CHANNEL_MAP * *);
static LONG SCardGetContextAndChannelFromHandleTH(SCARDHANDLE,
/*@out@*/ SCONTEXTMAP * *, /*@out@*/ CHANNEL_MAP * *);
static void SCardRemoveHandle(SCARDHANDLE);
static LONG SCardGetSetAttrib(SCARDHANDLE hCard, int command, DWORD dwAttrId,
LPBYTE pbAttr, LPDWORD pcbAttrLen);
static LONG getReaderStates(SCONTEXTMAP * currentContextMap);
static LONG getReaderStatesAndRegisterForEvents(SCONTEXTMAP * currentContextMap);
static LONG unregisterFromEvents(SCONTEXTMAP * currentContextMap);
/*
* Thread safety functions
*/
/**
* @brief Locks a mutex so another thread must wait to use this
* function.
*
* Wrapper to the function pthread_mutex_lock().
*/
inline static void SCardLockThread(void)
{
pthread_mutex_lock(&clientMutex);
}
/**
* @brief Unlocks a mutex so another thread may use the client.
*
* Wrapper to the function pthread_mutex_unlock().
*/
inline static void SCardUnlockThread(void)
{
pthread_mutex_unlock(&clientMutex);
}
/**
* @brief Tell if a context index from the Application Context vector \c
* _psContextMap is valid or not.
*
* @param[in] hContext Application Context whose index will be find.
*
* @return \c TRUE if the context exists
* @return \c FALSE if the context does not exist
*/
static int SCardGetContextValidity(SCARDCONTEXT hContext)
{
SCONTEXTMAP * currentContextMap;
SCardLockThread();
currentContextMap = SCardGetContextTH(hContext);
SCardUnlockThread();
return currentContextMap != NULL;
}
static LONG SCardEstablishContextTH(DWORD, LPCVOID, LPCVOID,
/*@out@*/ LPSCARDCONTEXT);
/**
* @brief Creates an Application Context to the PC/SC Resource Manager.
*
* This must be the first WinSCard function called in a PC/SC application.
* Each thread of an application shall use its own \ref SCARDCONTEXT, unless
* calling \ref SCardCancel(), which MUST be called with the same context as the
* context used to call \ref SCardGetStatusChange().
*
* @ingroup API
* @param[in] dwScope Scope of the establishment.
* This can either be a local or remote connection.
* - \ref SCARD_SCOPE_USER - Not used.
* - \ref SCARD_SCOPE_TERMINAL - Not used.
* - \ref SCARD_SCOPE_GLOBAL - Not used.
* - \ref SCARD_SCOPE_SYSTEM - Services on the local machine.
* @param[in] pvReserved1 Reserved for future use.
* @param[in] pvReserved2 Reserved for future use.
* @param[out] phContext Returned Application Context.
*
* @return Error code.
* @retval SCARD_S_SUCCESS Successful (\ref SCARD_S_SUCCESS)
* @retval SCARD_E_INVALID_PARAMETER \p phContext is null (\ref SCARD_E_INVALID_PARAMETER)
* @retval SCARD_E_INVALID_VALUE Invalid scope type passed (\ref SCARD_E_INVALID_VALUE )
* @retval SCARD_E_NO_MEMORY There is no free slot to store \p hContext (\ref SCARD_E_NO_MEMORY)
* @retval SCARD_E_NO_SERVICE The server is not running (\ref SCARD_E_NO_SERVICE)
* @retval SCARD_F_COMM_ERROR An internal communications error has been detected (\ref SCARD_F_COMM_ERROR)
* @retval SCARD_F_INTERNAL_ERROR An internal consistency check failed (\ref SCARD_F_INTERNAL_ERROR)
*
* @code
* SCARDCONTEXT hContext;
* LONG rv;
* ...
* rv = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL, &hContext);
* @endcode
*/
LONG SCardEstablishContext(DWORD dwScope, LPCVOID pvReserved1,
LPCVOID pvReserved2, LPSCARDCONTEXT phContext)
{
LONG rv;
API_TRACE_IN("%ld, %p, %p", dwScope, pvReserved1, pvReserved2)
PROFILE_START
/* Check if the server is running */
rv = SCardCheckDaemonAvailability();
if (rv != SCARD_S_SUCCESS)
goto end;
SCardLockThread();
rv = SCardEstablishContextTH(dwScope, pvReserved1,
pvReserved2, phContext);
SCardUnlockThread();
end:
PROFILE_END(rv)
API_TRACE_OUT("%ld", *phContext)
return rv;
}
/**
* @brief Creates a communication context to the PC/SC Resource
* Manager.
*
* This function should not be called directly. Instead, the thread-safe
* function SCardEstablishContext() should be called.
*
* @param[in] dwScope Scope of the establishment.
* This can either be a local or remote connection.
* - \ref SCARD_SCOPE_USER - Not used.
* - \ref SCARD_SCOPE_TERMINAL - Not used.
* - \ref SCARD_SCOPE_GLOBAL - Not used.
* - \ref SCARD_SCOPE_SYSTEM - Services on the local machine.
* @param[in] pvReserved1 Reserved for future use. Can be used for remote connection.
* @param[in] pvReserved2 Reserved for future use.
* @param[out] phContext Returned reference to this connection.
*
* @return Connection status.
* @retval SCARD_S_SUCCESS Successful (\ref SCARD_S_SUCCESS)
* @retval SCARD_E_INVALID_PARAMETER \p phContext is null. (\ref SCARD_E_INVALID_PARAMETER)
* @retval SCARD_E_INVALID_VALUE Invalid scope type passed (\ref SCARD_E_INVALID_VALUE)
* @retval SCARD_E_NO_MEMORY There is no free slot to store \p hContext (\ref SCARD_E_NO_MEMORY)
* @retval SCARD_E_NO_SERVICE The server is not running (\ref SCARD_E_NO_SERVICE)
* @retval SCARD_F_COMM_ERROR An internal communications error has been detected (\ref SCARD_F_COMM_ERROR)
* @retval SCARD_F_INTERNAL_ERROR An internal consistency check failed (\ref SCARD_F_INTERNAL_ERROR)
*/
static LONG SCardEstablishContextTH(DWORD dwScope,
/*@unused@*/ LPCVOID pvReserved1,
/*@unused@*/ LPCVOID pvReserved2, LPSCARDCONTEXT phContext)
{
LONG rv;
struct establish_struct scEstablishStruct;
uint32_t dwClientID = 0;
(void)pvReserved1;
(void)pvReserved2;
if (phContext == NULL)
return SCARD_E_INVALID_PARAMETER;
else
*phContext = 0;
/*
* Do this only once:
* - Initialize context list.
*/
if (isExecuted == 0)
{
int lrv;
/* NOTE: The list will never be freed (No API call exists to
* "close all contexts".
* Applications which load and unload the library will leak
* the list's internal structures. */
lrv = list_init(&contextMapList);
if (lrv < 0)
{
Log2(PCSC_LOG_CRITICAL, "list_init failed with return value: %d",
lrv);
return SCARD_E_NO_MEMORY;
}
lrv = list_attributes_seeker(&contextMapList,
SCONTEXTMAP_seeker);
if (lrv <0)
{
Log2(PCSC_LOG_CRITICAL,
"list_attributes_seeker failed with return value: %d", lrv);
list_destroy(&contextMapList);
return SCARD_E_NO_MEMORY;
}
if (getenv("PCSCLITE_NO_BLOCKING"))
{
Log1(PCSC_LOG_INFO, "Disable shared blocking");
sharing_shall_block = FALSE;
}
isExecuted = 1;
}
/* Establishes a connection to the server */
if (ClientSetupSession(&dwClientID) != 0)
{
return SCARD_E_NO_SERVICE;
}
{ /* exchange client/server protocol versions */
struct version_struct veStr;
veStr.major = PROTOCOL_VERSION_MAJOR;
veStr.minor = PROTOCOL_VERSION_MINOR;
veStr.rv = SCARD_S_SUCCESS;
rv = MessageSendWithHeader(CMD_VERSION, dwClientID, sizeof(veStr),
&veStr);
if (rv != SCARD_S_SUCCESS)
goto cleanup;
/* Read a message from the server */
rv = MessageReceive(&veStr, sizeof(veStr), dwClientID);
if (rv != SCARD_S_SUCCESS)
{
Log1(PCSC_LOG_CRITICAL,
"Your pcscd is too old and does not support CMD_VERSION");
rv = SCARD_F_COMM_ERROR;
goto cleanup;
}
Log3(PCSC_LOG_INFO, "Server is protocol version %d:%d",
veStr.major, veStr.minor);
if (veStr.rv != SCARD_S_SUCCESS)
{
rv = veStr.rv;
goto cleanup;
}
}
again:
/*
* Try to establish an Application Context with the server
*/
scEstablishStruct.dwScope = dwScope;
scEstablishStruct.hContext = 0;
scEstablishStruct.rv = SCARD_S_SUCCESS;
rv = MessageSendWithHeader(SCARD_ESTABLISH_CONTEXT, dwClientID,
sizeof(scEstablishStruct), (void *) &scEstablishStruct);
if (rv != SCARD_S_SUCCESS)
goto cleanup;
/*
* Read the response from the server
*/
rv = MessageReceive(&scEstablishStruct, sizeof(scEstablishStruct),
dwClientID);
if (rv != SCARD_S_SUCCESS)
goto cleanup;
if (scEstablishStruct.rv != SCARD_S_SUCCESS)
{
rv = scEstablishStruct.rv;
goto cleanup;
}
/* check we do not reuse an existing hContext */
if (NULL != SCardGetContextTH(scEstablishStruct.hContext))
/* we do not need to release the allocated context since
* SCardReleaseContext() does nothing on the server side */
goto again;
*phContext = scEstablishStruct.hContext;
/*
* Allocate the new hContext - if allocator full return an error
*/
rv = SCardAddContext(*phContext, dwClientID);
return rv;
cleanup:
ClientCloseSession(dwClientID);
return rv;
}
/**
* @brief Destroys a communication context to the PC/SC Resource
* Manager. This must be the last function called in a PC/SC application.
*
* @ingroup API
* @param[in] hContext Connection context to be closed.
*
* @return Connection status.
* @retval SCARD_S_SUCCESS Successful (\ref SCARD_S_SUCCESS)
* @retval SCARD_E_NO_SERVICE The server is not running (\ref SCARD_E_NO_SERVICE)
* @retval SCARD_E_INVALID_HANDLE Invalid \p hContext handle (\ref SCARD_E_INVALID_HANDLE)
* @retval SCARD_F_COMM_ERROR An internal communications error has been detected (\ref SCARD_F_COMM_ERROR)
*
* @code
* SCARDCONTEXT hContext;
* LONG rv;
* ...
* rv = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL, &hContext);
* rv = SCardReleaseContext(hContext);
* @endcode
*/
LONG SCardReleaseContext(SCARDCONTEXT hContext)
{
LONG rv;
struct release_struct scReleaseStruct;
SCONTEXTMAP * currentContextMap;
API_TRACE_IN("%ld", hContext)
PROFILE_START
/*
* Make sure this context has been opened
* and get currentContextMap
*/
currentContextMap = SCardGetAndLockContext(hContext);
if (NULL == currentContextMap)
{
rv = SCARD_E_INVALID_HANDLE;
goto error;
}
scReleaseStruct.hContext = hContext;
scReleaseStruct.rv = SCARD_S_SUCCESS;
rv = MessageSendWithHeader(SCARD_RELEASE_CONTEXT,
currentContextMap->dwClientID,
sizeof(scReleaseStruct), (void *) &scReleaseStruct);
if (rv != SCARD_S_SUCCESS)
goto end;
/*
* Read a message from the server
*/
rv = MessageReceive(&scReleaseStruct, sizeof(scReleaseStruct),
currentContextMap->dwClientID);
if (rv != SCARD_S_SUCCESS)
goto end;
rv = scReleaseStruct.rv;
end:
(void)pthread_mutex_unlock(¤tContextMap->mMutex);
/*
* Remove the local context from the stack
*/
SCardLockThread();
SCardRemoveContext(hContext);
SCardUnlockThread();
error:
PROFILE_END(rv)
API_TRACE_OUT("")
return rv;
}
/**
* @brief Establishes a connection to the reader specified in \p * szReader.
*
* @ingroup API
* @param[in] hContext Connection context to the PC/SC Resource Manager.
* @param[in] szReader Reader name to connect to.
* @param[in] dwShareMode Mode of connection type: exclusive or shared.
* - \ref SCARD_SHARE_SHARED - This application will allow others to share
* the reader.
* - \ref SCARD_SHARE_EXCLUSIVE - This application will NOT allow others to
* share the reader.
* - \ref SCARD_SHARE_DIRECT - Direct control of the reader, even without a
* card. \ref SCARD_SHARE_DIRECT can be used before using SCardControl() to
* send control commands to the reader even if a card is not present in the
* reader. Contrary to Windows winscard behavior, the reader is accessed in
* shared mode and not exclusive mode.
* @param[in] dwPreferredProtocols Desired protocol use.
* - 0 - valid only if dwShareMode is SCARD_SHARE_DIRECT
* - \ref SCARD_PROTOCOL_T0 - Use the T=0 protocol.
* - \ref SCARD_PROTOCOL_T1 - Use the T=1 protocol.
* - \ref SCARD_PROTOCOL_RAW - Use with memory type cards.
* \p dwPreferredProtocols is a bit mask of acceptable protocols for the
* connection. You can use (\ref SCARD_PROTOCOL_T0 | \ref SCARD_PROTOCOL_T1) if
* you do not have a preferred protocol.
* @param[out] phCard Handle to this connection.
* @param[out] pdwActiveProtocol Established protocol to this connection.
*
* @return Error code.
* @retval SCARD_S_SUCCESS Successful (\ref SCARD_S_SUCCESS)
* @retval SCARD_E_INVALID_HANDLE Invalid \p hContext handle (\ref SCARD_E_INVALID_HANDLE)
* @retval SCARD_E_INVALID_PARAMETER \p phCard or \p pdwActiveProtocol is NULL (\ref SCARD_E_INVALID_PARAMETER)
* @retval SCARD_E_INVALID_VALUE Invalid sharing mode, requested protocol, or reader name (\ref SCARD_E_INVALID_VALUE)
* @retval SCARD_E_NO_SERVICE The server is not running (\ref SCARD_E_NO_SERVICE)
* @retval SCARD_E_NO_SMARTCARD No smart card present (\ref SCARD_E_NO_SMARTCARD)
* @retval SCARD_E_PROTO_MISMATCH Requested protocol is unknown (\ref SCARD_E_PROTO_MISMATCH)
* @retval SCARD_E_READER_UNAVAILABLE Could not power up the reader or card (\ref SCARD_E_READER_UNAVAILABLE)
* @retval SCARD_E_SHARING_VIOLATION Someone else has exclusive rights (\ref SCARD_E_SHARING_VIOLATION)
* @retval SCARD_E_UNKNOWN_READER \p szReader is NULL (\ref SCARD_E_UNKNOWN_READER)
* @retval SCARD_E_UNSUPPORTED_FEATURE Protocol not supported (\ref SCARD_E_UNSUPPORTED_FEATURE)
* @retval SCARD_F_COMM_ERROR An internal communications error has been detected (\ref SCARD_F_COMM_ERROR)
* @retval SCARD_F_INTERNAL_ERROR An internal consistency check failed (\ref SCARD_F_INTERNAL_ERROR)
* @retval SCARD_W_UNPOWERED_CARD Card is not powered (\ref SCARD_W_UNPOWERED_CARD)
* @retval SCARD_W_UNRESPONSIVE_CARD Card is mute (\ref SCARD_W_UNRESPONSIVE_CARD)
*
* @code
* SCARDCONTEXT hContext;
* SCARDHANDLE hCard;
* DWORD dwActiveProtocol;
* LONG rv;
* ...
* rv = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL, &hContext);
* rv = SCardConnect(hContext, "Reader X", SCARD_SHARE_SHARED,
* SCARD_PROTOCOL_T0, &hCard, &dwActiveProtocol);
* @endcode
*/
LONG SCardConnect(SCARDCONTEXT hContext, LPCSTR szReader,
DWORD dwShareMode, DWORD dwPreferredProtocols, LPSCARDHANDLE phCard,
LPDWORD pdwActiveProtocol)
{
LONG rv;
struct connect_struct scConnectStruct;
SCONTEXTMAP * currentContextMap;
PROFILE_START
API_TRACE_IN("%ld %s %ld %ld", hContext, szReader, dwShareMode, dwPreferredProtocols)
/*
* Check for NULL parameters
*/
if (phCard == NULL || pdwActiveProtocol == NULL)
return SCARD_E_INVALID_PARAMETER;
else
*phCard = 0;
if (szReader == NULL)
return SCARD_E_UNKNOWN_READER;
/*
* Check for uninitialized strings
*/
if (strlen(szReader) > MAX_READERNAME)
return SCARD_E_INVALID_VALUE;
/*
* Make sure this context has been opened
*/
currentContextMap = SCardGetAndLockContext(hContext);
if (NULL == currentContextMap)
return SCARD_E_INVALID_HANDLE;
memset(scConnectStruct.szReader, 0, sizeof scConnectStruct.szReader);
strncpy(scConnectStruct.szReader, szReader, sizeof scConnectStruct.szReader);
scConnectStruct.szReader[sizeof scConnectStruct.szReader -1] = '\0';
scConnectStruct.hContext = hContext;
scConnectStruct.dwShareMode = dwShareMode;
scConnectStruct.dwPreferredProtocols = dwPreferredProtocols;
scConnectStruct.hCard = 0;
scConnectStruct.dwActiveProtocol = 0;
scConnectStruct.rv = SCARD_S_SUCCESS;
rv = MessageSendWithHeader(SCARD_CONNECT, currentContextMap->dwClientID,
sizeof(scConnectStruct), (void *) &scConnectStruct);
if (rv != SCARD_S_SUCCESS)
goto end;
/*
* Read a message from the server
*/
rv = MessageReceive(&scConnectStruct, sizeof(scConnectStruct),
currentContextMap->dwClientID);
if (rv != SCARD_S_SUCCESS)
goto end;
*phCard = scConnectStruct.hCard;
*pdwActiveProtocol = scConnectStruct.dwActiveProtocol;
if (scConnectStruct.rv == SCARD_S_SUCCESS)
{
/*
* Keep track of the handle locally
*/
rv = SCardAddHandle(*phCard, currentContextMap, szReader);
}
else
rv = scConnectStruct.rv;
end:
(void)pthread_mutex_unlock(¤tContextMap->mMutex);
PROFILE_END(rv)
API_TRACE_OUT("%d", *pdwActiveProtocol)
return rv;
}
/**
* @brief Reestablishes a connection to a reader that was
* previously connected to using SCardConnect().
*
* In a multi application environment it is possible for an application to
* reset the card in shared mode. When this occurs any other application trying
* to access certain commands will be returned the value \ref
* SCARD_W_RESET_CARD. When this occurs SCardReconnect() must be called in
* order to acknowledge that the card was reset and allow it to change its
* state accordingly.
*
* @ingroup API
* @param[in] hCard Handle to a previous call to connect.
* @param[in] dwShareMode Mode of connection type: exclusive/shared.
* - \ref SCARD_SHARE_SHARED - This application will allow others to share
* the reader.
* - \ref SCARD_SHARE_EXCLUSIVE - This application will NOT allow others to
* share the reader.
* @param[in] dwPreferredProtocols Desired protocol use.
* - \ref SCARD_PROTOCOL_T0 - Use the T=0 protocol.
* - \ref SCARD_PROTOCOL_T1 - Use the T=1 protocol.
* - \ref SCARD_PROTOCOL_RAW - Use with memory type cards.
* \p dwPreferredProtocols is a bit mask of acceptable protocols for
* the connection. You can use (SCARD_PROTOCOL_T0 | SCARD_PROTOCOL_T1)
* if you do not have a preferred protocol.
* @param[in] dwInitialization Desired action taken on the card/reader.
* - \ref SCARD_LEAVE_CARD - Do nothing.
* - \ref SCARD_RESET_CARD - Reset the card (warm reset).
* - \ref SCARD_UNPOWER_CARD - Power down the card (cold reset).
* - \ref SCARD_EJECT_CARD - Eject the card.
* @param[out] pdwActiveProtocol Established protocol to this connection.
*
* @return Error code.
* @retval SCARD_S_SUCCESS Successful (\ref SCARD_S_SUCCESS)
* @retval SCARD_E_INVALID_HANDLE Invalid \p hCard handle (\ref SCARD_E_INVALID_HANDLE)
* @retval SCARD_E_INVALID_PARAMETER \p phContext is null. (\ref SCARD_E_INVALID_PARAMETER)
* @retval SCARD_E_INVALID_VALUE Invalid sharing mode, requested protocol, or reader name (\ref SCARD_E_INVALID_VALUE)
* @retval SCARD_E_NO_SERVICE The server is not running (\ref SCARD_E_NO_SERVICE)
* @retval SCARD_E_NO_SMARTCARD No smart card present (\ref SCARD_E_NO_SMARTCARD)
* @retval SCARD_E_PROTO_MISMATCH Requested protocol is unknown (\ref SCARD_E_PROTO_MISMATCH)
* @retval SCARD_E_READER_UNAVAILABLE The reader has been removed (\ref SCARD_E_READER_UNAVAILABLE)
* @retval SCARD_E_SHARING_VIOLATION Someone else has exclusive rights (\ref SCARD_E_SHARING_VIOLATION)
* @retval SCARD_E_UNSUPPORTED_FEATURE Protocol not supported (\ref SCARD_E_UNSUPPORTED_FEATURE)
* @retval SCARD_F_COMM_ERROR An internal communications error has been detected (\ref SCARD_F_COMM_ERROR)
* @retval SCARD_F_INTERNAL_ERROR An internal consistency check failed (\ref SCARD_F_INTERNAL_ERROR)
* @retval SCARD_W_REMOVED_CARD The smart card has been removed (\ref SCARD_W_REMOVED_CARD)
* @retval SCARD_W_UNRESPONSIVE_CARD Card is mute (\ref SCARD_W_UNRESPONSIVE_CARD)
*
* @code
* SCARDCONTEXT hContext;
* SCARDHANDLE hCard;
* DWORD dwActiveProtocol, dwSendLength, dwRecvLength;
* LONG rv;
* BYTE pbRecvBuffer[10];
* BYTE pbSendBuffer[] = {0xC0, 0xA4, 0x00, 0x00, 0x02, 0x3F, 0x00};
* ...
* rv = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL, &hContext);
* rv = SCardConnect(hContext, "Reader X", SCARD_SHARE_SHARED,
* SCARD_PROTOCOL_T0, &hCard, &dwActiveProtocol);
* ...
* dwSendLength = sizeof(pbSendBuffer);
* dwRecvLength = sizeof(pbRecvBuffer);
* rv = SCardTransmit(hCard, SCARD_PCI_T0, pbSendBuffer, dwSendLength,
* &pioRecvPci, pbRecvBuffer, &dwRecvLength);
* / * Card has been reset by another application * /
* if (rv == SCARD_W_RESET_CARD)
* {
* rv = SCardReconnect(hCard, SCARD_SHARE_SHARED, SCARD_PROTOCOL_T0,
* SCARD_RESET_CARD, &dwActiveProtocol);
* }
* @endcode
*/
LONG SCardReconnect(SCARDHANDLE hCard, DWORD dwShareMode,
DWORD dwPreferredProtocols, DWORD dwInitialization,
LPDWORD pdwActiveProtocol)
{
LONG rv;
struct reconnect_struct scReconnectStruct;
SCONTEXTMAP * currentContextMap;
CHANNEL_MAP * pChannelMap;
PROFILE_START
API_TRACE_IN("%ld %ld %ld", hCard, dwShareMode, dwPreferredProtocols)
if (pdwActiveProtocol == NULL)
return SCARD_E_INVALID_PARAMETER;
/* Retry loop for blocking behaviour */
retry:
/*
* Make sure this handle has been opened
*/
rv = SCardGetContextChannelAndLockFromHandle(hCard, ¤tContextMap,
&pChannelMap);
if (rv == -1)
return SCARD_E_INVALID_HANDLE;
scReconnectStruct.hCard = hCard;
scReconnectStruct.dwShareMode = dwShareMode;
scReconnectStruct.dwPreferredProtocols = dwPreferredProtocols;
scReconnectStruct.dwInitialization = dwInitialization;
scReconnectStruct.dwActiveProtocol = *pdwActiveProtocol;
scReconnectStruct.rv = SCARD_S_SUCCESS;
rv = MessageSendWithHeader(SCARD_RECONNECT, currentContextMap->dwClientID,
sizeof(scReconnectStruct), (void *) &scReconnectStruct);
if (rv != SCARD_S_SUCCESS)
goto end;
/*
* Read a message from the server
*/
rv = MessageReceive(&scReconnectStruct, sizeof(scReconnectStruct),