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os/security/crypto/weakcryptospi/source/asymmetric/rsakeypairshim.cpp
author sl@SLION-WIN7.fritz.box
Fri, 15 Jun 2012 03:10:57 +0200
changeset 0 bde4ae8d615e
permissions -rw-r--r--
First public contribution. 
     1 /*

     2 * Copyright (c) 2007-2010 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 *

    16 */

    17 

    18 

    19 #include "rsakeypairshim.h"

    20 #include <cryptospi/cryptokeypairgeneratorapi.h>

    21 #include <cryptospi/keypair.h>

    22 #include <cryptospi/cryptoparams.h>

    23 #include <cryptospi/cryptospidef.h>

    24 

    25 using namespace CryptoSpi;

    26 

    27 /* CRSAKeyPair */

    28 

    29 const TUint KFermat4 = 65537;

    30 

    31 CRSAKeyPairShim* CRSAKeyPairShim::NewLC(TUint aModulusBits, TRSAPrivateKeyType aKeyType)

    32 	{

    33 	CRSAKeyPairShim* self = new(ELeave) CRSAKeyPairShim();

    34 	CleanupStack::PushL(self);

    35 	self->ConstructL(aModulusBits, aKeyType, KFermat4);

    36 	return self;

    37 	}

    38 

    39 CRSAKeyPairShim::~CRSAKeyPairShim(void)

    40 	{

    41 	}

    42 

    43 CRSAKeyPairShim::CRSAKeyPairShim(void)

    44 	{

    45 	}

    46 

    47 void CRSAKeyPairShim::ConstructL(TUint aModulusBits, TRSAPrivateKeyType aKeyType, TInt aPublicExponent)

    48 	{

    49 	CKeyPairGenerator* keyPairGeneratorImpl=NULL;

    50 	CKeyPairGeneratorFactory::CreateKeyPairGeneratorL(

    51 											keyPairGeneratorImpl,

    52 											KRSAKeyPairGeneratorUid,

    53 											NULL);

    54 	CleanupStack::PushL(keyPairGeneratorImpl);

    55 

    56 	// put the RSA parameters into an array

    57 	CCryptoParams* keyParameters = CCryptoParams::NewLC();

    58 	keyParameters->AddL(aPublicExponent, KRsaKeyParameterEUid);

    59 	if (aKeyType == EStandard)

    60 		{

    61 		keyParameters->AddL(KRsaPrivateKeyStandard, KRsaKeyTypeUid);

    62 		}

    63 	else if (aKeyType == EStandardCRT)

    64 		{

    65 		keyParameters->AddL(KRsaPrivateKeyCRT, KRsaKeyTypeUid);

    66 		}

    67 

    68 	// call the api to create an RSA key pair

    69 	CKeyPair* keyPair = 0;

    70 	keyPairGeneratorImpl->GenerateKeyPairL(aModulusBits, *keyParameters, keyPair);

    71 	

    72 	CleanupStack::PushL(keyPair);

    73 

    74 	/* 

    75 	 * Convert the CKeyPair to CRSAPrivateKey{CRT/Standard} and CRSAPublicKey

    76 	 * The public key becomes the owner of n and e RIntegers

    77 	 */

    78 	RInteger n = RInteger::NewL(keyPair->PublicKey().GetBigIntL(KRsaKeyParameterNUid));

    79 	CleanupClosePushL(n);

    80 	RInteger e = RInteger::NewL(keyPair->PublicKey().GetBigIntL(KRsaKeyParameterEUid));

    81 	CleanupClosePushL(e);

    82 	iPublic = CRSAPublicKey::NewL(n, e);

    83 

    84 	if (aKeyType == EStandard)

    85 		{

    86 		RInteger n = RInteger::NewL(keyPair->PrivateKey().GetBigIntL(KRsaKeyParameterNUid));

    87 		CleanupClosePushL(n);

    88 		RInteger d = RInteger::NewL(keyPair->PrivateKey().GetBigIntL(KRsaKeyParameterDUid));

    89 		CleanupClosePushL(d);

    90 		iPrivate = CRSAPrivateKeyStandard::NewL(n, d);

    91 		CleanupStack::Pop(2, &n);

    92 		}

    93 	else if (aKeyType == EStandardCRT)

    94 		{

    95 		RInteger n = RInteger::NewL(keyPair->PrivateKey().GetBigIntL(KRsaKeyParameterNUid));

    96 		CleanupClosePushL(n);

    97 		RInteger p = RInteger::NewL(keyPair->PrivateKey().GetBigIntL(KRsaKeyParameterPUid));

    98 		CleanupClosePushL(p);

    99 		RInteger q = RInteger::NewL(keyPair->PrivateKey().GetBigIntL(KRsaKeyParameterQUid));

   100 		CleanupClosePushL(q);

   101 		RInteger dp = RInteger::NewL(keyPair->PrivateKey().GetBigIntL(KRsaKeyParameterDPUid));

   102 		CleanupClosePushL(p);

   103 		RInteger dq = RInteger::NewL(keyPair->PrivateKey().GetBigIntL(KRsaKeyParameterDQUid));

   104 		CleanupClosePushL(q);

   105 		RInteger qinv = RInteger::NewL(keyPair->PrivateKey().GetBigIntL(KRsaKeyParameterQInvUid));

   106 		CleanupClosePushL(qinv);

   107 		iPrivate = CRSAPrivateKeyCRT::NewL(n, p, q, dp, dq, qinv);

   108 		CleanupStack::Pop(6, &n);

   109 		}

   110 	/*

   111 	 * cleanup stack - it should contain keyPairGeneratorImpl, keyParameters, keyPair, n, e

   112 	 */

   113 	CleanupStack::Pop(2, &n);

   114 	CleanupStack::PopAndDestroy(3, keyPairGeneratorImpl);

   115 	}
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