smf/smfcredentialmgr/smfcredmgrserver/src/smfcredmgrdbuser.cpp
changeset 14 a469c0e6e7fb
child 18 013a02bf2bb0
equal deleted inserted replaced
13:b5d63d5fc252 14:a469c0e6e7fb
       
     1 /**
       
     2  * Copyright (c) 2010 Sasken Communication Technologies Ltd.
       
     3  * All rights reserved.
       
     4  * This component and the accompanying materials are made available
       
     5  * under the terms of the "Eclipse Public License v1.0"
       
     6  * which accompanies  this distribution, and is available
       
     7  * at the URL "http://www.eclipse.org/legal/epl-v10.html"
       
     8  *
       
     9  * Initial Contributors:
       
    10  * Pritam Roy Biswas, Sasken Communication Technologies Ltd - Initial contribution
       
    11  *
       
    12  * Description:
       
    13  * This file contains routines to handle the data-base operations like insertion, query etc. 
       
    14  * on Credential Manager Server Database
       
    15  */
       
    16 
       
    17 #include <BAUTILS.H>
       
    18 #include "smfcredmgrdbuser.h"
       
    19 #include "smfcredmgrdb.h"
       
    20 
       
    21 CSmfCredMgrDbUser* CSmfCredMgrDbUser::NewL(CSmfCredMgrServerSession* aSession)
       
    22 	{
       
    23 	CSmfCredMgrDbUser* self = CSmfCredMgrDbUser::NewLC(aSession);
       
    24 	CleanupStack::Pop(self);
       
    25 	return (self);
       
    26 	}
       
    27 
       
    28 CSmfCredMgrDbUser* CSmfCredMgrDbUser::NewLC(CSmfCredMgrServerSession* aSession)
       
    29 	{
       
    30 	CSmfCredMgrDbUser* self = new (ELeave) CSmfCredMgrDbUser(aSession);
       
    31 	CleanupStack::PushL(self);
       
    32 	self->ConstructL();
       
    33 	return (self);
       
    34 	}
       
    35 
       
    36 void CSmfCredMgrDbUser::ConstructL()
       
    37 	{
       
    38 	TInt err = iFileSession.Connect();
       
    39 	User::LeaveIfError(err);
       
    40 
       
    41 	iFileSession.SetSessionToPrivate(EDriveC);
       
    42 
       
    43 	TFileName dbFileName;
       
    44 	iFileSession.PrivatePath(dbFileName);
       
    45 	TFindFile PrivFolder(iFileSession);
       
    46 
       
    47 	// find drive-private path
       
    48 	if (KErrNone == PrivFolder.FindByDir(dbFileName, KNullDesC))
       
    49 		{
       
    50 		dbFileName.Copy(PrivFolder.File());
       
    51 		dbFileName.Append(KSmfCredMgrDbFileName);
       
    52 		iDbFilePathName = dbFileName;
       
    53 		if (BaflUtils::FileExists(iFileSession, dbFileName))
       
    54 			{
       
    55 			//err = iDataBase.Open(dbFileName);
       
    56 			User::LeaveIfError(iDataBase.Open(dbFileName));
       
    57 			RSqlDatabase::TIsolationLevel isolationLevel =
       
    58 					RSqlDatabase::EReadUncommitted;
       
    59 			iDataBase.SetIsolationLevel(isolationLevel);
       
    60 			}
       
    61 		else
       
    62 			{
       
    63 			//file not present
       
    64 			User::Leave(KErrNotFound);
       
    65 			}
       
    66 		}
       
    67 	else
       
    68 		{
       
    69 		//path not present
       
    70 		User::Leave(KErrPathNotFound);
       
    71 		}
       
    72 	}
       
    73 
       
    74 CSmfCredMgrDbUser::CSmfCredMgrDbUser(CSmfCredMgrServerSession* aSession) :
       
    75 	iSession(aSession)
       
    76 	{
       
    77 	}
       
    78 
       
    79 CSmfCredMgrDbUser::~CSmfCredMgrDbUser()
       
    80 	{
       
    81 	iFileSession.Close();
       
    82 	iDataBase.Close();
       
    83 	}
       
    84 
       
    85 TInt CSmfCredMgrDbUser::PluginIDTableInsert(const TDesC& aPluginId,
       
    86 		const TDesC& aAuthAppId, TBool aEnableFlag)
       
    87 	{
       
    88 	TInt err(KErrNone);
       
    89 	RSqlStatement sqlStatement;
       
    90 	RSqlDatabase db;
       
    91 
       
    92 	err = db.Open(iDbFilePathName);
       
    93 	__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
    94 
       
    95 	err = sqlStatement.Prepare(db, KSmfPluginIDTableInsert);
       
    96 	TInt paramIndex(KErrNone);
       
    97 
       
    98 	TBuf<KMaxBufSize> pluginbuf(aPluginId);
       
    99 
       
   100 	paramIndex = sqlStatement.ParameterIndex(_L(":Val1"));
       
   101 	err = sqlStatement.BindText(paramIndex, pluginbuf);
       
   102 
       
   103 	paramIndex = sqlStatement.ParameterIndex(_L(":Val2"));
       
   104 	err = sqlStatement.BindText(paramIndex, aAuthAppId);
       
   105 
       
   106 	paramIndex = sqlStatement.ParameterIndex(_L(":Val3"));
       
   107 	err = sqlStatement.BindInt(paramIndex, aEnableFlag);
       
   108 
       
   109 	err = db.Exec(KBegin);
       
   110 	__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   111 	err = sqlStatement.Exec();
       
   112 	if (KSqlErrConstraint == err)
       
   113 		{
       
   114 		//Table already present.
       
   115 		}
       
   116 	else if (err < KErrNone)
       
   117 		{
       
   118 		__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   119 		}
       
   120 
       
   121 	err = db.Exec(KCommit);
       
   122 	__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   123 
       
   124 	//if commit fails we have to roll back
       
   125 	if (err < KErrNone)
       
   126 		{
       
   127 		err = db.Exec(KRollback);
       
   128 		}
       
   129 	sqlStatement.Close();
       
   130 	db.Close();
       
   131 	if (err >= 0)
       
   132 		{
       
   133 		return KErrNone;
       
   134 		}
       
   135 	return err;
       
   136 	}
       
   137 
       
   138 TInt CSmfCredMgrDbUser::URLTableInsert(const TDesC& aAuthAppId,
       
   139 		const TDesC& aURL)
       
   140 	{
       
   141 	TInt err(KErrNone);
       
   142 	RSqlStatement sqlStatement;
       
   143 	RSqlDatabase db;
       
   144 
       
   145 	err = db.Open(iDbFilePathName);
       
   146 	__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   147 
       
   148 	err = sqlStatement.Prepare(db, KSmfURLTableInsert);
       
   149 	TInt paramIndex(KErrNone);
       
   150 
       
   151 	paramIndex = sqlStatement.ParameterIndex(_L(":Val1"));
       
   152 	err = sqlStatement.BindText(paramIndex, aAuthAppId);
       
   153 
       
   154 	TBuf<KMaxBufSize> urlbuf(aURL);
       
   155 
       
   156 	paramIndex = sqlStatement.ParameterIndex(_L(":Val2"));
       
   157 	err = sqlStatement.BindText(paramIndex, urlbuf);
       
   158 
       
   159 	err = db.Exec(KBegin);
       
   160 	__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   161 	err = sqlStatement.Exec();
       
   162 	if (KSqlErrConstraint == err)
       
   163 		{
       
   164 		//Table already present.
       
   165 		}
       
   166 	else if (err < KErrNone)
       
   167 		{
       
   168 		__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   169 		}
       
   170 
       
   171 	err = db.Exec(KCommit);
       
   172 	__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   173 
       
   174 	//if commit fails we have to roll back
       
   175 	if (err < KErrNone)
       
   176 		{
       
   177 		err = db.Exec(KRollback);
       
   178 		}
       
   179 	sqlStatement.Close();
       
   180 	db.Close();
       
   181 	if (err >= 0)
       
   182 		{
       
   183 		return KErrNone;
       
   184 		}
       
   185 	return err;
       
   186 	}
       
   187 
       
   188 TInt CSmfCredMgrDbUser::RegTokenValidityTableInsert(const TDesC& aRegToken,
       
   189 		const TDesC& aAuthAppId, const TUint aValidity)
       
   190 	{
       
   191 	TInt err(KErrNone);
       
   192 	RSqlStatement sqlStatement;
       
   193 	RSqlDatabase db;
       
   194 
       
   195 	TBuf<KMaxBufSize> regTokenBuf(aRegToken);
       
   196 
       
   197 	err = db.Open(iDbFilePathName);
       
   198 	__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   199 
       
   200 	err = sqlStatement.Prepare(db, KSmfRegTokenValidityTableInsert);
       
   201 	TInt paramIndex(KErrNone);
       
   202 
       
   203 	paramIndex = sqlStatement.ParameterIndex(_L(":Val1"));
       
   204 	err = sqlStatement.BindText(paramIndex, aRegToken);
       
   205 
       
   206 	paramIndex = sqlStatement.ParameterIndex(_L(":Val2"));
       
   207 	err = sqlStatement.BindText(paramIndex, aAuthAppId);
       
   208 
       
   209 	paramIndex = sqlStatement.ParameterIndex(_L(":Val3"));
       
   210 	err = sqlStatement.BindInt(paramIndex, aValidity);
       
   211 
       
   212 	err = db.Exec(KBegin);
       
   213 	__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   214 	err = sqlStatement.Exec();
       
   215 	if (KSqlErrConstraint == err)
       
   216 		{
       
   217 		//Table already present.
       
   218 		}
       
   219 	else if (err < KErrNone)
       
   220 		{
       
   221 		__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   222 		}
       
   223 
       
   224 	err = db.Exec(KCommit);
       
   225 	__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   226 
       
   227 	//if commit fails we have to roll back
       
   228 	if (err < KErrNone)
       
   229 		{
       
   230 		err = db.Exec(KRollback);
       
   231 		}
       
   232 	sqlStatement.Close();
       
   233 	db.Close();
       
   234 	if (err >= 0)
       
   235 		{
       
   236 		return KErrNone;
       
   237 		}
       
   238 	return err;
       
   239 
       
   240 	}
       
   241 
       
   242 TInt CSmfCredMgrDbUser::AuthParamsTableInsert(const TDesC& aAuthAppId,
       
   243 		const TDesC& aKey, const TDesC& aSecret)
       
   244 	{
       
   245 	TInt err(KErrNone);
       
   246 	RSqlStatement sqlStatement;
       
   247 	RSqlDatabase db;
       
   248 
       
   249 	TBuf<KMaxBufSize> keyBuf(aKey);
       
   250 	TBuf<KMaxBufSize> secretBuf(aSecret);
       
   251 
       
   252 	err = db.Open(iDbFilePathName);
       
   253 	__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   254 
       
   255 	err = sqlStatement.Prepare(db, KSmfAuthParamsTableInsert);
       
   256 	TInt paramIndex(KErrNone);
       
   257 
       
   258 	paramIndex = sqlStatement.ParameterIndex(_L(":Val1"));
       
   259 	err = sqlStatement.BindText(paramIndex, aAuthAppId);
       
   260 
       
   261 	paramIndex = sqlStatement.ParameterIndex(_L(":Val2"));
       
   262 	err = sqlStatement.BindText(paramIndex, keyBuf);
       
   263 
       
   264 	paramIndex = sqlStatement.ParameterIndex(_L(":Val3"));
       
   265 	err = sqlStatement.BindText(paramIndex, secretBuf);
       
   266 
       
   267 	err = db.Exec(KBegin);
       
   268 	__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   269 	err = sqlStatement.Exec();
       
   270 	if (KSqlErrConstraint == err)
       
   271 		{
       
   272 		//Table already present.
       
   273 		}
       
   274 	else if (err < KErrNone)
       
   275 		{
       
   276 		__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   277 		}
       
   278 
       
   279 	err = db.Exec(KCommit);
       
   280 	__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   281 
       
   282 	//if commit fails we have to roll back
       
   283 	if (err < KErrNone)
       
   284 		{
       
   285 		err = db.Exec(KRollback);
       
   286 		}
       
   287 	sqlStatement.Close();
       
   288 	db.Close();
       
   289 	if (err >= 0)
       
   290 		{
       
   291 		return KErrNone;
       
   292 		}
       
   293 	return err;
       
   294 	}
       
   295 
       
   296 void CSmfCredMgrDbUser::readFlagInPluginIdTable(const TDesC& aPluginID,
       
   297 		TInt& aFlag)
       
   298 	{
       
   299 	TInt err(KErrNone);
       
   300 
       
   301 	RSqlStatement sqlReadStatement;
       
   302 	TInt paramIndex(KErrNone);
       
   303 
       
   304 	err = sqlReadStatement.Prepare(iDataBase, KSmfDbReadFlagInPluginTable);
       
   305 
       
   306 	paramIndex = sqlReadStatement.ParameterIndex(_L(":iID"));
       
   307 	err = sqlReadStatement.BindText(paramIndex, aPluginID);
       
   308 
       
   309 	while ((err = sqlReadStatement.Next()) == KSqlAtRow)
       
   310 		{
       
   311 		//sometimes sqlStmt.Next returns KSqlAtRow even if no row is present
       
   312 		if (!sqlReadStatement.IsNull(0))
       
   313 			{
       
   314 			aFlag = sqlReadStatement.ColumnInt(0);
       
   315 			}
       
   316 		}
       
   317 	sqlReadStatement.Close();
       
   318 	}
       
   319 
       
   320 void CSmfCredMgrDbUser::readAuthAppIdInPluginIdTable(const TDesC& aPluginID,
       
   321 		TDes& aAuthAppId)
       
   322 	{
       
   323 	TInt err(KErrNone);
       
   324 
       
   325 	RSqlStatement sqlReadStatement;
       
   326 	TInt paramIndex(KErrNone);
       
   327 
       
   328 	err = sqlReadStatement.Prepare(iDataBase, KSmfDbReadAuthAppIdInPluginTable);
       
   329 
       
   330 	paramIndex = sqlReadStatement.ParameterIndex(_L(":iID"));
       
   331 	err = sqlReadStatement.BindText(paramIndex, aPluginID);
       
   332 
       
   333 	while ((err = sqlReadStatement.Next()) == KSqlAtRow)
       
   334 		{
       
   335 		//sometimes sqlStmt.Next returns KSqlAtRow even if no row is present
       
   336 		if (!sqlReadStatement.IsNull(0))
       
   337 			{
       
   338 			sqlReadStatement.ColumnText(0, aAuthAppId);
       
   339 			}
       
   340 		}
       
   341 	sqlReadStatement.Close();
       
   342 	}
       
   343 
       
   344 void CSmfCredMgrDbUser::readAuthTokens(const TDesC& aAuthAppId, RArray<
       
   345 		TSmfAuthToken>& aArray)
       
   346 	{
       
   347 	TInt err(KErrNone);
       
   348 
       
   349 	RSqlStatement sqlReadStatement;
       
   350 	TInt paramIndex(KErrNone);
       
   351 
       
   352 	err = sqlReadStatement.Prepare(iDataBase, KSmfDbReadAuthTokens);
       
   353 	paramIndex = sqlReadStatement.ParameterIndex(_L(":iID"));
       
   354 	err = sqlReadStatement.BindText(paramIndex, aAuthAppId);
       
   355 
       
   356 	while ((err = sqlReadStatement.Next()) == KSqlAtRow)
       
   357 		{
       
   358 		//sometimes sqlStmt.Next returns KSqlAtRow even if no row is present
       
   359 		if (!sqlReadStatement.IsNull(0))
       
   360 			{
       
   361 			TSmfAuthToken Set;
       
   362 
       
   363 			Set.iKey = HBufC::NewL(KMaxAuthTokenLength);
       
   364 			Set.iSecret = HBufC::NewL(KMaxAuthTokenLength);
       
   365 
       
   366 			TBuf<KMaxBufSize> keyBuf;
       
   367 			TBuf<KMaxBufSize> secretBuf;
       
   368 
       
   369 			sqlReadStatement.ColumnText(0, keyBuf);
       
   370 			sqlReadStatement.ColumnText(1, secretBuf);
       
   371 
       
   372 			Set.iKey->Des().Copy(keyBuf);
       
   373 			Set.iSecret->Des().Copy(secretBuf);
       
   374 			//add it to the array
       
   375 			aArray.Append(Set);
       
   376 
       
   377 			}
       
   378 		else
       
   379 			{
       
   380 			__ASSERT_DEBUG( 0, User::Invariant());
       
   381 			}
       
   382 		}
       
   383 	sqlReadStatement.Close();
       
   384 	}
       
   385 
       
   386 void CSmfCredMgrDbUser::fetchPluginList(const TDesC& aRegToken, RPointerArray<
       
   387 		HBufC>& aArray)
       
   388 	{
       
   389 	TBuf<KMaxBufSize> authAppID;
       
   390 	readAuthAppIdInRegTokenTable(aRegToken, authAppID);
       
   391 	readPluginId(authAppID, aArray);
       
   392 	}
       
   393 
       
   394 void CSmfCredMgrDbUser::readAuthAppIdInRegTokenTable(const TDesC& aRegToken,
       
   395 		TDes& aAuthAppId)
       
   396 	{
       
   397 	TInt err(KErrNone);
       
   398 
       
   399 	RSqlStatement sqlReadStatement;
       
   400 	TInt paramIndex(KErrNone);
       
   401 	TInt64 duration;
       
   402 	TBuf<KMaxBufSize> tokenBuf(aRegToken);
       
   403 	err = sqlReadStatement.Prepare(iDataBase,
       
   404 			KSmfDbReadAuthAppIdInRegTokenTable);
       
   405 	paramIndex = sqlReadStatement.ParameterIndex(_L(":iID"));
       
   406 	err = sqlReadStatement.BindText(paramIndex, tokenBuf);
       
   407 
       
   408 	while ((err = sqlReadStatement.Next()) == KSqlAtRow)
       
   409 		{
       
   410 		//sometimes sqlStmt.Next returns KSqlAtRow even if no row is present
       
   411 		if (!sqlReadStatement.IsNull(0))
       
   412 			{
       
   413 			duration = sqlReadStatement.ColumnInt(1);
       
   414 			if (duration) //to be checked with epoch date-time
       
   415 				{
       
   416 				sqlReadStatement.ColumnText(0, aAuthAppId);
       
   417 				}
       
   418 			}
       
   419 		else
       
   420 			{
       
   421 			__ASSERT_DEBUG( 0, User::Invariant());
       
   422 			}
       
   423 		}
       
   424 	sqlReadStatement.Close();
       
   425 	}
       
   426 void CSmfCredMgrDbUser::readPluginId(const TDesC& aAuthAppId, RPointerArray<
       
   427 		HBufC>& aArray)
       
   428 	{
       
   429 	TInt err(KErrNone);
       
   430 	RSqlStatement sqlReadStatement;
       
   431 	TInt paramIndex(KErrNone);
       
   432 	TInt flag;
       
   433 
       
   434 	err = sqlReadStatement.Prepare(iDataBase, KSmfDbReadPluginID);
       
   435 	paramIndex = sqlReadStatement.ParameterIndex(_L(":iID"));
       
   436 	err = sqlReadStatement.BindText(paramIndex, aAuthAppId);
       
   437 
       
   438 	while ((err = sqlReadStatement.Next()) == KSqlAtRow)
       
   439 		{
       
   440 		//sometimes sqlStmt.Next returns KSqlAtRow even if no row is present
       
   441 		if (!sqlReadStatement.IsNull(0))
       
   442 			{
       
   443 			flag = sqlReadStatement.ColumnInt(1);
       
   444 			if (flag > 0)
       
   445 				{
       
   446 				TBuf<KMaxBufSize> pluginbuf;
       
   447 				HBufC* buf = HBufC::NewL(KMaxBufSize);
       
   448 				sqlReadStatement.ColumnText(0, pluginbuf);
       
   449 				buf->Des().Copy(pluginbuf);
       
   450 				aArray.Append(buf);
       
   451 				}
       
   452 			}
       
   453 		else
       
   454 			{
       
   455 			__ASSERT_DEBUG( 0, User::Invariant());
       
   456 			}
       
   457 		}
       
   458 	sqlReadStatement.Close();
       
   459 	}
       
   460 
       
   461 void CSmfCredMgrDbUser::readURL(const TDesC& aAuthAppId,
       
   462 		RPointerArray<HBufC>& aArray)
       
   463 	{
       
   464 	TInt err(KErrNone);
       
   465 
       
   466 	RSqlStatement sqlReadStatement;
       
   467 	TInt paramIndex(KErrNone);
       
   468 
       
   469 	err = sqlReadStatement.Prepare(iDataBase, KSmfDbReadURL);
       
   470 	paramIndex = sqlReadStatement.ParameterIndex(_L(":iID"));
       
   471 	err = sqlReadStatement.BindText(paramIndex, aAuthAppId);
       
   472 
       
   473 	while ((err = sqlReadStatement.Next()) == KSqlAtRow)
       
   474 		{
       
   475 		//sometimes sqlStmt.Next returns KSqlAtRow even if no row is present
       
   476 		if (!sqlReadStatement.IsNull(0))
       
   477 			{
       
   478 			TBuf<KMaxBufSize> urlBuf;
       
   479 			HBufC* buf = HBufC::NewL(KMaxBufSize);
       
   480 			sqlReadStatement.ColumnText(0, urlBuf);
       
   481 			buf->Des().Copy(urlBuf);
       
   482 			aArray.Append(buf);
       
   483 			}
       
   484 		else
       
   485 			{
       
   486 			__ASSERT_DEBUG( 0, User::Invariant());
       
   487 			}
       
   488 		}
       
   489 	sqlReadStatement.Close();
       
   490 	}
       
   491 
       
   492 void CSmfCredMgrDbUser::readValidity(const TDesC& aAuthAppId, TInt64& aValidity)
       
   493 	{
       
   494 	TInt err(KErrNone);
       
   495 
       
   496 	RSqlStatement sqlReadStatement;
       
   497 	TInt paramIndex(KErrNone);
       
   498 
       
   499 	err = sqlReadStatement.Prepare(iDataBase, KSmfDbReadValidity);
       
   500 	paramIndex = sqlReadStatement.ParameterIndex(_L(":iID"));
       
   501 	err = sqlReadStatement.BindText(paramIndex, aAuthAppId);
       
   502 
       
   503 	while ((err = sqlReadStatement.Next()) == KSqlAtRow)
       
   504 		{
       
   505 		//sometimes sqlStmt.Next returns KSqlAtRow even if no row is present
       
   506 		if (!sqlReadStatement.IsNull(0))
       
   507 			{
       
   508 			aValidity = sqlReadStatement.ColumnInt64(1);
       
   509 			}
       
   510 		else
       
   511 			{
       
   512 			__ASSERT_DEBUG( 0, User::Invariant());
       
   513 			}
       
   514 		}
       
   515 	sqlReadStatement.Close();
       
   516 
       
   517 	}
       
   518 
       
   519 void CSmfCredMgrDbUser::readRegistrationToken(const TDesC& aAuthAppId,
       
   520 		TDesC& aRegToken)
       
   521 	{
       
   522 	TInt err(KErrNone);
       
   523 
       
   524 	RSqlStatement sqlReadStatement;
       
   525 	TInt paramIndex(KErrNone);
       
   526 
       
   527 	err = sqlReadStatement.Prepare(iDataBase, KSmfDbReadRegistrationToken);
       
   528 	paramIndex = sqlReadStatement.ParameterIndex(_L(":iID"));
       
   529 	err = sqlReadStatement.BindText(paramIndex, aAuthAppId);
       
   530 
       
   531 	while ((err = sqlReadStatement.Next()) == KSqlAtRow)
       
   532 		{
       
   533 		//sometimes sqlStmt.Next returns KSqlAtRow even if no row is present
       
   534 		if (!sqlReadStatement.IsNull(0))
       
   535 			{
       
   536 			aRegToken = sqlReadStatement.ColumnTextL(0);//aKey.AllocL();
       
   537 			}
       
   538 		else
       
   539 			{
       
   540 			__ASSERT_DEBUG( 0, User::Invariant());
       
   541 			}
       
   542 		}
       
   543 	sqlReadStatement.Close();
       
   544 	}
       
   545 
       
   546 TInt CSmfCredMgrDbUser::updatePlugin(const TDesC& aPluginID,
       
   547 		const TBool& aFlag, const TDesC& aOldPluginID)
       
   548 	{
       
   549 	TInt err(KErrNone);
       
   550 	RSqlStatement sqlStatement;
       
   551 	TInt paramIndex(KErrNone);
       
   552 	TBuf<KMaxBufSize> newPluginBuf(aPluginID);
       
   553 	TBuf<KMaxBufSize> OldPluginBuf(aOldPluginID);
       
   554 	RSqlDatabase db;
       
   555 
       
   556 	err = db.Open(iDbFilePathName);
       
   557 	__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   558 
       
   559 	err = sqlStatement.Prepare(db, KUpdatePluginID);
       
   560 
       
   561 	paramIndex = sqlStatement.ParameterIndex(_L(":iText"));
       
   562 	err = sqlStatement.BindText(paramIndex, newPluginBuf);
       
   563 
       
   564 	paramIndex = sqlStatement.ParameterIndex(_L(":iFlag"));
       
   565 	err = sqlStatement.BindInt(paramIndex, aFlag);
       
   566 
       
   567 	paramIndex = sqlStatement.ParameterIndex(_L(":iID"));
       
   568 	err = sqlStatement.BindText(paramIndex, OldPluginBuf);
       
   569 
       
   570 	err = db.Exec(KBegin);
       
   571 	__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   572 	err = sqlStatement.Exec();
       
   573 	if (KSqlErrConstraint == err)
       
   574 		{
       
   575 		//
       
   576 		}
       
   577 	else if (err < KErrNone)
       
   578 		{
       
   579 		__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   580 		}
       
   581 
       
   582 	err = db.Exec(KCommit);
       
   583 	__ASSERT_DEBUG( (err >= KErrNone), User::Invariant());
       
   584 
       
   585 	//if commit fails we have to roll back
       
   586 	if (err < KErrNone)
       
   587 		{
       
   588 		err = db.Exec(KRollback);
       
   589 		}
       
   590 	sqlStatement.Close();
       
   591 	db.Close();
       
   592 	if (err >= 0)
       
   593 		{
       
   594 		return KErrNone;
       
   595 		}
       
   596 	return err;
       
   597 	}