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os/security/crypto/weakcryptospi/source/spi/cryptospisetup/cryptopluginsloader.cpp
author sl
Tue, 10 Jun 2014 14:32:02 +0200
changeset 1 260cb5ec6c19
permissions -rw-r--r--
Update contrib. 
     1 /*

     2 * Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "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 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 * crypto plugins loader implementation

    16 * crypto spi state implementation

    17 *

    18 */

    19 

    20 

    21 /**

    22  @file

    23 */

    24 #include "cryptopluginsloader.h"

    25 #include <f32file.h>

    26 #include <cryptospi/cryptospidef.h>

    27 #include "cryptospiproperty.h"

    28 #include <e32property.h>

    29 

    30 using namespace CryptoSpi;

    31 

    32 _LIT(KPluginDir, "z:\\sys\\bin\\");

    33 

    34 HBufC *GetConfigFileNameL();

    35 

    36 //

    37 // Implementation of TCharacteristicsDll

    38 //

    39 TCharacteristicsDll::TCharacteristicsDll(const TAny* aCharacteristics, TInt aIndex)

    40 :iCharacteristics(aCharacteristics), iDllIndex(aIndex)

    41 	{

    42 	}

    43 

    44 void TCharacteristicsDll::ExternalizeL(RWriteStream& aStream)

    45 	{

    46 	const TCommonCharacteristics* common=reinterpret_cast<const TCommonCharacteristics*>(iCharacteristics);

    47 	switch (common->iInterfaceUID)

    48 		{

    49 	case KHashInterface:

    50 	case KAsyncHashInterface:

    51 		{

    52 		const THashCharacteristics* characteristics=reinterpret_cast<const THashCharacteristics*>(iCharacteristics);

    53 		characteristics->ExternalizeL(aStream);

    54 		}

    55 		break;

    56 	case KRandomInterface:

    57 	case KAsyncRandomInterface:

    58 		{

    59 		const TRandomCharacteristics* characteristics=reinterpret_cast<const TRandomCharacteristics*>(iCharacteristics);

    60 		characteristics->ExternalizeL(aStream);		

    61 		}

    62 		break;

    63 

    64 	case KSymmetricCipherInterface:

    65 	case KAsyncSymmetricCipherInterface:

    66 		{

    67 		const TSymmetricCipherCharacteristics* characteristics=reinterpret_cast<const TSymmetricCipherCharacteristics*>(iCharacteristics);

    68 		characteristics->ExternalizeL(aStream);		

    69 		}

    70 		break;

    71 

    72 	case KAsymmetricCipherInterface:

    73 	case KAsyncAsymmetricCipherInterface:

    74 		{

    75 		const TAsymmetricCipherCharacteristics* characteristics=reinterpret_cast<const TAsymmetricCipherCharacteristics*>(iCharacteristics);

    76 		characteristics->ExternalizeL(aStream);		

    77 		}

    78 		break;

    79 

    80 	case KSignerInterface:

    81 	case KVerifierInterface:

    82 	case KAsyncSignerInterface:

    83 	case KAsyncVerifierInterface:

    84 		{

    85 		const TAsymmetricSignatureCharacteristics* characteristics=reinterpret_cast<const TAsymmetricSignatureCharacteristics*>(iCharacteristics);

    86 		characteristics->ExternalizeL(aStream);		

    87 		}

    88 		break;

    89 	

    90 	case KKeyAgreementInterface:

    91 	case KAsyncKeyAgreementInterface:

    92 		{

    93 		const TKeyAgreementCharacteristics* characteristics=reinterpret_cast<const TKeyAgreementCharacteristics*>(iCharacteristics);

    94 		characteristics->ExternalizeL(aStream);

    95 		}

    96 		break;

    97 

    98 	case KKeypairGeneratorInterface:

    99 	case KAsyncKeypairGeneratorInterface:

   100 		{

   101 		const TAsymmetricKeypairGeneratorCharacteristics* characteristics=reinterpret_cast<const TAsymmetricKeypairGeneratorCharacteristics*>(iCharacteristics);

   102 		characteristics->ExternalizeL(aStream);

   103 		}

   104 		break;

   105 #ifdef SYMBIAN_SDP_IPSEC_VOIP_SUPPORT			

   106 	case KMacInterface:

   107 	case KAsyncMacInterface:

   108 		{

   109 		const TMacCharacteristics* characteristics=reinterpret_cast<const TMacCharacteristics*>(iCharacteristics);

   110 		characteristics->ExternalizeL(aStream);

   111 		}

   112 		break;

   113 #endif		

   114 	default:

   115 		User::Leave(KErrNotSupported); 

   116 		}

   117 		

   118 	aStream.WriteInt8L(iDllIndex);

   119 	}

   120 

   121 //

   122 // Implementation of CCharacteristicDllIndexList

   123 //

   124 CCharacteristicDllIndexList* CCharacteristicDllIndexList::NewL()

   125 	{

   126 	CCharacteristicDllIndexList* self=new(ELeave) CCharacteristicDllIndexList();

   127 	return self;

   128 	}

   129 

   130 CCharacteristicDllIndexList* CCharacteristicDllIndexList::NewLC()

   131 	{

   132 	CCharacteristicDllIndexList* self=new(ELeave) CCharacteristicDllIndexList();

   133 	CleanupStack::PushL(self);

   134 	return self;		

   135 	}

   136 

   137 CCharacteristicDllIndexList::CCharacteristicDllIndexList()

   138 	{

   139 	}

   140 

   141 CCharacteristicDllIndexList::~CCharacteristicDllIndexList()

   142 	{

   143 	iCharacteristicList.Close();	

   144 	}

   145 

   146 void CCharacteristicDllIndexList::ExternalizeL(RWriteStream& aStream)

   147 	{

   148 	TInt count=iCharacteristicList.Count();

   149 	aStream.WriteInt16L(count);

   150 	for (TInt i=0;i<count;i++)

   151 		{

   152 		iCharacteristicList[i].ExternalizeL(aStream);

   153 		}

   154 	}

   155 

   156 //

   157 // Implementation of CCryptoPluginsLoader

   158 //

   159 CCryptoPluginsLoader* CCryptoPluginsLoader::NewL()

   160 	{

   161 	CCryptoPluginsLoader* self=NewLC();

   162 	CleanupStack::Pop(self);

   163 	return self;

   164 	}

   165 

   166 CCryptoPluginsLoader* CCryptoPluginsLoader::NewLC()

   167 	{

   168 	CCryptoPluginsLoader* self=new(ELeave)CCryptoPluginsLoader();

   169 	CleanupStack::PushL(self);

   170 	self->ConstructL();

   171 	return self;

   172 	}

   173 	

   174 CCryptoPluginsLoader::CCryptoPluginsLoader()

   175 	{

   176 	}

   177 

   178 CCryptoPluginsLoader::~CCryptoPluginsLoader()

   179 	{

   180 	//Destroy the characteristic map

   181 	THashMapIter<TInt32, CCharacteristicDllIndexList*> it(iInterfaceCharacteristicsMap);

   182 	it.NextValue();

   183 	while (it.CurrentValue())

   184 		{

   185 		delete *it.CurrentValue();

   186 		it.NextValue();

   187 		}

   188 	iInterfaceCharacteristicsMap.Close();

   189 

   190 	//Unload the plugin DLLs and release the array

   191 	TInt dllCount=iPluginDllList.Count();

   192 	for (TInt i=0;i<dllCount;i++)

   193 		{

   194 		iPluginDllList[i].Close();	

   195 		}

   196 	iPluginDllList.Close();

   197 	iPluginNames.Close();

   198 	}

   199 

   200 void CCryptoPluginsLoader::ConstructL()

   201 	{

   202 	LoadPluginsL();

   203 	}

   204 

   205 void CCryptoPluginsLoader::LoadPluginsL()

   206 	{

   207 	HBufC *configFileBuf = GetConfigFileNameL();

   208 	CleanupStack::PushL(configFileBuf);

   209 	TPtr configFile(configFileBuf->Des());

   210 

   211 	RFs fs;

   212 	User::LeaveIfError(fs.Connect());

   213 	CleanupClosePushL(fs);

   214 

   215 	RFile file;

   216 	User::LeaveIfError(file.Open(fs, configFile, KEntryAttNormal));

   217 	CleanupClosePushL(file);

   218 

   219 	TFileText ft;

   220 	ft.Set(file);

   221 	TFileName line;

   222 	

   223 	User::LeaveIfError(ft.Read(line));

   224 		

   225 	//Load all the plugins

   226 	do

   227 		{	

   228 		TFileName filename;

   229 		filename.Append(KPluginDir);

   230 		filename.Append(line);

   231 

   232 		//Load...

   233 		RLibrary plugin;

   234 		TInt err=plugin.Load(filename);

   235 		if (err==KErrNone)

   236 			{

   237 			CleanupClosePushL(plugin);

   238 			iPluginDllList.AppendL(plugin);

   239 			CleanupStack::Pop(&plugin);

   240 			iPluginNames.AppendL(line);

   241 			}

   242 		}

   243 	while(ft.Read(line) == KErrNone);

   244 		

   245 		

   246 	CleanupStack::PopAndDestroy(&file);

   247 	CleanupStack::PopAndDestroy(&fs);

   248 	CleanupStack::PopAndDestroy(configFileBuf);

   249 	

   250 	BuildPluginCharacteristicsL();		

   251 	}

   252 

   253 void CCryptoPluginsLoader::BuildPluginCharacteristicsL()

   254 	{

   255 	TInt dllCount=iPluginDllList.Count();

   256 	TInt interfaceCount=sizeof(KInterfacesUids)/sizeof(KInterfacesUids[0]);

   257 	for (TInt i=0;i<dllCount;i++)

   258 		{

   259 		

   260 		//find the enumeration function pointer

   261 		EnumerateCharacteristicsFunc enumerateFunc=(EnumerateCharacteristicsFunc)iPluginDllList[i].Lookup(EEnumerateCharacteristicsOrdinal);

   262 		if (enumerateFunc)

   263 			{

   264 			for (TInt j=0;j<interfaceCount;j++)

   265 				{

   266 				BuildInterfaceCharacteristicsL(KInterfacesUids[j], enumerateFunc, i);

   267 				}

   268 			}

   269 		}

   270 	}	

   271 

   272 void CCryptoPluginsLoader::BuildInterfaceCharacteristicsL(TUid aInterfaceUid, 

   273 													EnumerateCharacteristicsFunc aEntryFunc,

   274 													TInt aDllIndex)

   275 	{

   276 	//Get the corresponding characteristics from the plug-in module

   277 	TInt numPlugins=0;

   278 	const TCharacteristics** p = aEntryFunc(aInterfaceUid, numPlugins);

   279 	

   280 	//characteristics are available

   281 	if (p)

   282 		{

   283 		//look for it first

   284 		CCharacteristicDllIndexList** charsListPtr=iInterfaceCharacteristicsMap.Find(aInterfaceUid.iUid);

   285 		CCharacteristicDllIndexList* charsList=NULL;

   286 		//create new one if it is not in the map

   287 		if (!charsListPtr)

   288 			{

   289 			charsList=CCharacteristicDllIndexList::NewLC();

   290 			iInterfaceCharacteristicsMap.InsertL(aInterfaceUid.iUid, charsList);

   291 			CleanupStack::Pop(charsList);

   292 			}

   293 		else

   294 			{

   295 			//Use the existing one.

   296 			charsList=*charsListPtr;

   297 			}

   298 		

   299 		for (TInt i=0; i<numPlugins; ++i)

   300 			{

   301 			// The pointer should never be null, but try to prevent

   302 			// rogue plug-ins from breaking the framework.

   303 			ASSERT(p);

   304 			if (p)

   305 				{

   306 				TCharacteristicsDll temp(*p, aDllIndex);

   307 				charsList->iCharacteristicList.AppendL(temp);

   308 				}

   309 			p++;							

   310 			}

   311 		}

   312 	}	

   313 

   314 void CCryptoPluginsLoader::CreatePluginConfigPropertyL()

   315 	{

   316 	RProcess thisProcess;

   317 	// sanity check that feature property category in common header equals SID of this process

   318 	ASSERT(KCryptoSpiPropertyCat == thisProcess.SecureId());

   319 	TSecurityPolicy readPolicy(TSecurityPolicy::EAlwaysPass);

   320 	TSecurityPolicy writePolicy(thisProcess.SecureId());

   321 	

   322 	TInt count=iPluginNames.Count();

   323 	TInt publishResult=KErrNone;

   324 	for (TInt i=0;i<count;i++)

   325 		{

   326 		publishResult = RProperty::Define(KPluginsConfigurationKey+i, RProperty::EByteArray, readPolicy, writePolicy);

   327 		if ((publishResult == KErrNone) || (publishResult == KErrAlreadyExists))

   328 			{

   329 			TSizeStream ss;

   330 			RWriteStream ws(&ss);

   331 			ws<<iPluginNames[i];

   332 	

   333 			HBufC8* buf = HBufC8::NewLC(ss.Size());

   334 			TPtr8 bufPtr(buf->Des());

   335 			RDesWriteStream dws(bufPtr);

   336 			dws<<iPluginNames[i];

   337 			dws.CommitL();

   338 			publishResult = RProperty::Set(KCryptoSpiPropertyCat, KPluginsConfigurationKey+i, bufPtr);

   339 			CleanupStack::PopAndDestroy(buf);

   340 			}

   341 		else

   342 			{

   343 			User::Leave(publishResult);

   344 			}

   345 		}

   346 	publishResult = RProperty::Define(KPluginsConfigurationKeyCount, RProperty::EInt, readPolicy, writePolicy);	

   347 	if ((publishResult == KErrNone) || (publishResult == KErrAlreadyExists))

   348 		{

   349 		publishResult = RProperty::Set(KCryptoSpiPropertyCat, KPluginsConfigurationKeyCount, count);

   350 		}

   351 	else

   352 		{

   353 		User::Leave(publishResult);

   354 		}

   355 	}

   356 

   357 void CCryptoPluginsLoader::CreateInterfacePropertyL(TInt32 aInterface)

   358 	{

   359 	TSizeStream ss;

   360 	RWriteStream ws(&ss);

   361 	ws.WriteInt32L(0);

   362 	DoCreateInterfacePropertyL(ws, aInterface);

   363 	

   364 	HBufC8* buf = HBufC8::NewLC(ss.Size());

   365 	TPtr8 bufPtr(buf->Des());

   366 	RDesWriteStream dws(bufPtr);

   367 	dws.WriteInt32L(ss.Size());

   368 	DoCreateInterfacePropertyL(dws, aInterface);

   369 	dws.CommitL();

   370 	User::LeaveIfError(RProperty::Set(KCryptoSpiPropertyCat, aInterface, bufPtr));

   371 	CleanupStack::PopAndDestroy(buf);	

   372 	}

   373 	

   374 void CCryptoPluginsLoader::DoCreateInterfacePropertyL(RWriteStream& aStream, TInt32 aInterface)

   375 	{

   376 	RProcess thisProcess;

   377 	// sanity check that feature property category in common header equals SID of this process

   378 	ASSERT(KCryptoSpiPropertyCat == thisProcess.SecureId());

   379 	TSecurityPolicy readPolicy(TSecurityPolicy::EAlwaysPass);

   380 	TSecurityPolicy writePolicy(thisProcess.SecureId());

   381 	

   382 	TInt publishResult = RProperty::Define(aInterface, RProperty::ELargeByteArray, readPolicy, writePolicy);

   383 	if ((publishResult == KErrNone) || (publishResult == KErrAlreadyExists))

   384 		{

   385 		CCharacteristicDllIndexList** charsListPtr=iInterfaceCharacteristicsMap.Find(aInterface);

   386 		if (charsListPtr)

   387 			{

   388 			(*charsListPtr)->ExternalizeL(aStream);

   389 			}

   390 		}

   391 	else

   392 		{

   393 		User::Leave(publishResult);

   394 		}		

   395 	}

   396 	

   397 //

   398 // Implementation of TSizeStream

   399 //

   400 void TSizeStream::DoWriteL(const TAny* /* aPtr */, TInt aLength)

   401 	{

   402 	iSize += aLength;

   403 	}

   404 

   405 _LIT(KPluginConfigFile, "z:\\resource\\cryptospi\\plug-ins.txt");

   406 HBufC *GetConfigFileNameL()

   407 	{

   408 	// Check the command line. It should be empty or a single decimal digit

   409 	TInt argsLen = User::CommandLineLength();

   410 

   411 	if(argsLen == 0)

   412 		{

   413 		// No arguments so return the default config file name

   414 		return KPluginConfigFile().AllocL();

   415 		}

   416 

   417 	// We only support a single digit argument

   418 	if(argsLen != 1)

   419 		{

   420 		User::Leave(KErrArgument);

   421 		}

   422 	

   423 

   424 	// Read the single char command line

   425 	TBuf<1> argsBuf;

   426 	User::CommandLine(argsBuf);

   427 		

   428 	// Check if it is a digit

   429 	TChar ch(argsBuf[0]);

   430 	if(!ch.IsDigit())

   431 		{

   432 		User::Leave(KErrArgument);

   433 		}

   434 

   435 	// Create buffer for config file name, inc space to append the digit

   436 	HBufC *configFileBuf = HBufC::NewL(KPluginConfigFile().Length()+1);

   437 	TPtr configFile(configFileBuf->Des());

   438 		

   439 	// Initialise it to the default file name

   440 	configFile = KPluginConfigFile;

   441 		

   442 	// Append the digit to the config file name

   443 	configFile.Append(ch);

   444 	

   445 	return configFileBuf;

   446 	}

   447 

   448 // End of file
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