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

     2 * Copyright (c) 2007-2010 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 "dsashim.h"

    20 #include <cryptospi/cryptosignatureapi.h>

    21 #include <cryptospi/cryptospidef.h>

    22 #include <cryptospi/keys.h>

    23 #include "keyconverter.h"

    24 

    25 #include "../common/inlines.h"

    26 

    27 

    28 using namespace CryptoSpi;

    29 

    30 // CDsaSignerShim ////////////////////////////////////////////////////////

    31 

    32 CDsaSignerShim* CDsaSignerShim::NewL(const CDSAPrivateKey& aKey)

    33 	{

    34 	CDsaSignerShim* self = CDsaSignerShim::NewLC(aKey);

    35 	CleanupStack::Pop(self);

    36 	return self;

    37 	}

    38 

    39 CDsaSignerShim* CDsaSignerShim::NewLC(const CDSAPrivateKey& aKey)

    40 	{

    41 	CDsaSignerShim* self = new (ELeave) CDsaSignerShim(aKey);

    42 	CleanupStack::PushL(self);

    43 	self->ConstructL(aKey);

    44 	return self;

    45 	}

    46 

    47 CDsaSignerShim::CDsaSignerShim(const CDSAPrivateKey& aKey)

    48 	: CDSASigner(aKey)

    49 	{

    50 	}

    51 

    52 CDsaSignerShim::~CDsaSignerShim()

    53 	{

    54 	delete iSignerImpl;

    55 	delete iKey;

    56 	}

    57 

    58 void CDsaSignerShim::ConstructL(const CDSAPrivateKey& aKey)

    59 	{

    60 	iKey = KeyConverter::CreateKeyL(aKey);

    61 	CSignatureFactory::CreateSignerL(

    62 									iSignerImpl,

    63 									KDsaSignerUid,

    64 									*iKey,

    65 									KPaddingModeNoneUid,

    66 									NULL);

    67 	}

    68 

    69 

    70 CDSASignature* CDsaSignerShim::SignL(const TDesC8& aInput) const

    71 	{

    72 	//Sign the input data

    73 	CCryptoParams* signature = CCryptoParams::NewLC();

    74 	iSignerImpl->SignL(aInput, *signature);

    75 	

    76 	//Retrieve the R&S in DSA signature from the array 

    77 	const TInteger& cR=signature->GetBigIntL(KDsaSignatureParameterRUid);

    78 	const TInteger& cS=signature->GetBigIntL(KDsaSignatureParameterSUid);

    79 	

    80 	

    81 	//Make copies of the DSA signature

    82 	RInteger r=RInteger::NewL(cR);

    83 	CleanupClosePushL(r);

    84 	RInteger s=RInteger::NewL(cS);

    85 	CleanupClosePushL(s);	

    86 	

    87 	//Create the DSA signature object, the ownership of r&s is transfered to dsaSig

    88 	CDSASignature* dsaSig=CDSASignature::NewL(r, s);

    89 	

    90 	//Cleanup

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

    92 	CleanupStack::PopAndDestroy(signature);

    93 	

    94 	return dsaSig;

    95 	}

    96 

    97 TInt CDsaSignerShim::MaxInputLength() const

    98 	{

    99 	TInt maxInputLength=0; 

   100 	TRAPD(err, maxInputLength=iSignerImpl->GetMaximumInputLengthL())

   101 	if (err==KErrNone)

   102 		{

   103 		return maxInputLength;

   104 		}

   105 	else

   106 		{

   107 		return err;

   108 		}

   109 	}

   110 

   111 

   112 // CDsaVerifierShim ////////////////////////////////////////////////////////

   113 CDsaVerifierShim* CDsaVerifierShim::NewL(const CDSAPublicKey& aKey)

   114 	{

   115 	CDsaVerifierShim* self = CDsaVerifierShim::NewLC(aKey);

   116 	CleanupStack::Pop(self);

   117 	return self;

   118 	}

   119 

   120 CDsaVerifierShim* CDsaVerifierShim::NewLC(const CDSAPublicKey& aKey)

   121 	{

   122 	CDsaVerifierShim* self = new (ELeave) CDsaVerifierShim(aKey);

   123 	CleanupStack::PushL(self);

   124 	self->ConstructL(aKey);

   125 	return self;

   126 	}

   127 

   128 CDsaVerifierShim::CDsaVerifierShim(const CDSAPublicKey& aKey)

   129 	: CDSAVerifier(aKey)

   130 	{

   131 	}

   132 

   133 CDsaVerifierShim::~CDsaVerifierShim()

   134 	{

   135 	delete iVerifierImpl;

   136 	delete iKey;

   137 	}

   138 

   139 void CDsaVerifierShim::ConstructL(const CDSAPublicKey& aKey)

   140 	{

   141 	iKey = KeyConverter::CreateKeyL(aKey);

   142 	CSignatureFactory::CreateVerifierL(

   143 									iVerifierImpl,

   144 									KDsaVerifierUid,

   145 									*iKey,

   146 									KPaddingModeNoneUid,

   147 									NULL);

   148 											

   149 	}

   150 

   151 TBool CDsaVerifierShim::VerifyL(const TDesC8& aInput, const CDSASignature& aSignature) const

   152 	{

   153 	//create the array format dsa signature for the new crypto spi

   154 	CCryptoParams* dsaSig = CCryptoParams::NewLC();

   155 

   156 	dsaSig->AddL(aSignature.R(), KDsaSignatureParameterRUid);

   157 	dsaSig->AddL(aSignature.S(), KDsaSignatureParameterSUid);

   158 

   159 	//pass the signature and input to the new crypto spi to be verified

   160 	TBool verificationResult=EFalse;

   161 	iVerifierImpl->VerifyL(aInput, *dsaSig, verificationResult);

   162 

   163 	//Cleanup the array

   164 	CleanupStack::PopAndDestroy(dsaSig);

   165 

   166 	return verificationResult;

   167 	}

   168 

   169 TInt CDsaVerifierShim::MaxInputLength() const

   170 	{

   171 	TInt maxInputLength=0; 

   172 	TRAPD(err, maxInputLength=iVerifierImpl->GetMaximumInputLengthL())

   173 	if (err==KErrNone)

   174 		{

   175 		return maxInputLength;

   176 		}

   177 	else

   178 		{

   179 		return err;

   180 		}

   181 	}

   182
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