author | MattD <mattd@symbian.org> |
Thu, 12 Nov 2009 16:07:39 +0000 | |
changeset 21 | 7e3f204e6c81 |
parent 8 | 35751d3474b7 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of the License "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* Software Mac Implementation |
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* plugin-dll headers |
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* |
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*/ |
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|
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|
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/** |
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@file |
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*/ |
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#include "cmacimpl.h" |
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#include "pluginconfig.h" |
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#include <cryptospi/cryptomacapi.h> |
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/** |
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* Headers from CryptoSpi framework |
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*/ |
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#include <cryptospi/cryptospidef.h> |
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|
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using namespace SoftwareCrypto; |
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using namespace CryptoSpi; |
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|
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/** |
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* Constants used to generate Key1, Key2 and Key3 |
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*/ |
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const TUint8 K1Constant[] = {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01}; |
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const TUint8 K2Constant[] = {0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02}; |
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const TUint8 K3Constant[] = {0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03}; |
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|
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const TInt KAesXcbcMac96Size = 12; |
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|
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CCMacImpl* CCMacImpl::NewL(const CKey& aKey, CSymmetricCipher* aSymmetricCipher, TInt32 aAlgorithmUid) |
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{ |
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CCMacImpl* self = CCMacImpl::NewLC(aKey, aSymmetricCipher, aAlgorithmUid); |
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CleanupStack::Pop(self); |
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return self; |
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} |
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CCMacImpl* CCMacImpl::NewLC(const CKey& aKey, CSymmetricCipher* aSymmetricCipher, TInt32 aAlgorithmUid) |
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{ |
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CCMacImpl* self = NULL; |
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TRAPD(err, self = new (ELeave) CCMacImpl(aSymmetricCipher)); |
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if(err!=KErrNone) |
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{ |
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delete aSymmetricCipher; |
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User::Leave(err); |
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} |
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CleanupStack::PushL(self); |
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self->ConstructL(aKey, aAlgorithmUid); |
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return self; |
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} |
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|
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CKey* CCMacImpl::Create128bitKeyL(const CKey& aKey) |
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{ |
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TBuf8<KMacBlockSize> keybuffer; |
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CryptoSpi::CKey* key = NULL; |
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|
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const TDesC8& keyContent=aKey.GetTDesC8L(CryptoSpi::KSymmetricKeyParameterUid); |
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|
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if( (TUint32)keyContent.Size() > KMacBlockSize) |
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{ |
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// Create key |
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CryptoSpi::CCryptoParams* keyParams = CryptoSpi::CCryptoParams::NewLC(); |
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keybuffer.SetLength(KMacBlockSize); |
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keybuffer.FillZ(); |
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// 'keybuffer' is the key with 128 zero bits. |
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keyParams->AddL(keybuffer, CryptoSpi::KSymmetricKeyParameterUid); |
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key=CryptoSpi::CKey::NewLC(aKey.KeyProperty(),*keyParams); |
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// evaluate final key data. |
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SetKeyL(*key); |
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CleanupStack::PopAndDestroy(2, keyParams); |
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keybuffer.Copy(FinalL(keyContent)); |
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// 'keybuffer' contains the final key data. |
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} |
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else |
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{ |
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keybuffer.Copy(keyContent); |
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TUint i; |
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for (i=keybuffer.Size();i<KMacBlockSize;++i) |
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{ |
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keybuffer.Append(0); |
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} |
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// 'keybuffer' contains the final key data. |
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} |
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|
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// create a new CKey instance and assign it to iKey using 'keybuffer'. |
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CryptoSpi::CCryptoParams* keyParams = CryptoSpi::CCryptoParams::NewLC(); |
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keyParams->AddL(keybuffer, CryptoSpi::KSymmetricKeyParameterUid); |
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102 |
key=CryptoSpi::CKey::NewL(aKey.KeyProperty(),*keyParams); |
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|
103 |
CleanupStack::PopAndDestroy(keyParams); |
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|
104 |
|
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105 |
// 'key' will contain the final CKey instance. |
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106 |
return key; |
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107 |
} |
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108 |
|
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109 |
void CCMacImpl::SetKeyL(const CKey& aKey) |
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110 |
{ |
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111 |
const TPtrC8 KeyConstant1(K1Constant, KMacBlockSize); |
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112 |
const TPtrC8 KeyConstant2(K2Constant, KMacBlockSize); |
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113 |
const TPtrC8 KeyConstant3(K3Constant, KMacBlockSize); |
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114 |
|
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115 |
// Initialize the cipher class to encrypt Keyconstants to generate additional keys. |
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116 |
if (iImplementationUid == CryptoSpi::KAlgorithmCipherAesXcbcPrf128) |
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117 |
{ |
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118 |
// RFC 4434: keys that were not equal in length to 128 bits will no longer be |
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119 |
// rejected but instead will be made 128 bits for AES-XCBC-PRF-128 Algorithm only. |
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120 |
CryptoSpi::CKey* key = Create128bitKeyL(aKey); |
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121 |
CleanupStack::PushL(key); |
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122 |
iCipherImpl->SetKeyL(*key); |
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123 |
CleanupStack::PopAndDestroy(key); |
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124 |
} |
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125 |
else |
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126 |
{ |
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127 |
iCipherImpl->SetKeyL(aKey); |
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128 |
} |
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129 |
iCipherImpl->SetCryptoModeL(CryptoSpi::KCryptoModeEncryptUid); |
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130 |
iCipherImpl->SetOperationModeL(CryptoSpi::KOperationModeNoneUid); |
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131 |
|
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132 |
// cipher class expects the output buffer to be empty. |
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133 |
iKey1.Zero(); |
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134 |
iKey2.Zero(); |
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135 |
iKey3.Zero(); |
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136 |
|
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137 |
// aKey is used to generate Key1, Key2 and Key3. |
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138 |
// Where Key1 = encrypt KeyConstant1 with aKey |
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139 |
// Where Key2 = encrypt KeyConstant2 with aKey |
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140 |
// Where Key3 = encrypt KeyConstant3 with aKey |
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141 |
|
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142 |
// Key1 is used to encrypt the data whereas |
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143 |
// Key2 and Key3 is used to XOR with the last |
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144 |
// block. |
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145 |
iCipherImpl->ProcessFinalL(KeyConstant1, iKey1); |
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146 |
iCipherImpl->ProcessFinalL(KeyConstant2, iKey2); |
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147 |
iCipherImpl->ProcessFinalL(KeyConstant3, iKey3); |
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148 |
|
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149 |
// Create CKey instance with key1 |
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150 |
CCryptoParams* keyParam =CCryptoParams::NewLC(); |
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151 |
keyParam->AddL(iKey1, CryptoSpi::KSymmetricKeyParameterUid); |
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|
152 |
|
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153 |
delete iKey; |
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154 |
iKey = NULL; |
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155 |
iKey=CKey::NewL(aKey.KeyProperty(), *keyParam); |
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156 |
// Initialize the cipher class for MAC calculation. |
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157 |
iCipherImpl->SetKeyL(*iKey); |
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|
158 |
iCipherImpl->SetOperationModeL(CryptoSpi::KOperationModeCBCUid); |
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|
159 |
Mem::FillZ(iE, sizeof(iE)); |
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|
160 |
iCipherImpl->SetIvL(TPtrC8(iE, KMacBlockSize)); |
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|
161 |
|
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162 |
CleanupStack::PopAndDestroy(keyParam); |
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|
163 |
} |
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|
164 |
|
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165 |
CCMacImpl::~CCMacImpl() |
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|
166 |
{ |
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|
167 |
delete iKey; |
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|
168 |
delete iCipherImpl; |
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|
169 |
} |
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|
170 |
|
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171 |
CCMacImpl::CCMacImpl(const CCMacImpl& aCCMacImpl) |
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172 |
{ |
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173 |
iImplementationUid = aCCMacImpl.iImplementationUid; |
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|
174 |
iKey1.Copy(aCCMacImpl.iKey1); |
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|
175 |
iKey2.Copy(aCCMacImpl.iKey2); |
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|
176 |
iKey3.Copy(aCCMacImpl.iKey3); |
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|
177 |
|
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|
178 |
(void)Mem::Copy(iE, aCCMacImpl.iE, sizeof(iE)); |
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|
179 |
(void)Mem::Copy(iData, aCCMacImpl.iData, sizeof(iData)); |
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|
180 |
|
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181 |
iCurrentTotalLength = aCCMacImpl.iCurrentTotalLength; |
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|
182 |
} |
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|
183 |
|
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184 |
const CExtendedCharacteristics* CCMacImpl::GetExtendedCharacteristicsL() |
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185 |
{ |
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|
186 |
return iCipherImpl->GetExtendedCharacteristicsL(); |
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187 |
} |
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|
188 |
|
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189 |
CCMacImpl::CCMacImpl(CryptoSpi::CSymmetricCipher* aSymmetricCipher) |
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|
190 |
{ |
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|
191 |
iCipherImpl = aSymmetricCipher; |
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192 |
aSymmetricCipher = NULL; |
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|
193 |
iMacValue.SetLength(KMacBlockSize); |
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|
194 |
} |
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|
195 |
|
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|
196 |
void CCMacImpl::ConstructL(const CKey& aKey, TInt32 aAlgorithmUid) |
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197 |
{ |
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198 |
iImplementationUid = aAlgorithmUid; |
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|
199 |
|
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|
200 |
switch(aAlgorithmUid) |
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|
201 |
{ |
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|
202 |
case CryptoSpi::KAlgorithmCipherAesXcbcMac96: |
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203 |
case CryptoSpi::KAlgorithmCipherAesXcbcPrf128: |
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204 |
{ |
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SetKeyL(aKey); |
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break; |
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} |
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208 |
default: |
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209 |
{ |
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User::Leave(KErrNotSupported); |
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} |
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} |
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} |
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|
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/** |
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* Takes the message and XOR it with iData. |
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* |
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* @param aKey 128bit key. This key will be XORed with iData. |
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* @param aOutput The result of the XOR operation will be copied to this. |
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* Its length should be 128bit (16bytes). |
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*/ |
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222 |
|
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void CCMacImpl::XORKeyWithData(const TDesC8& aKey, TDes8& aOutput) |
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{ |
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for (TInt i = 0; i < KMacBlockSize; ++i) |
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226 |
{ |
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aOutput[i] = iData[i] ^ aKey[i]; |
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} |
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} |
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230 |
|
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/** |
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* This function is used to pad message M to make the total message |
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* length multiple of block size (128bit). The last block M[n] will be |
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* padded with a single "1" bit followed by the number of "0" bits required |
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* to increase M[n]'s size to 128 bits (Block Size). |
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* |
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* Used in AES-XCBC-MAC-96 and AES-XCBC-PRF-128 Mac algorithms. |
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*/ |
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void CCMacImpl::PadMessage() |
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{ |
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if(iCurrentTotalLength < KMacBlockSize) |
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242 |
{ |
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iData[iCurrentTotalLength] = 0x80; |
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Mem::FillZ(iData + iCurrentTotalLength+1, KMacBlockSize - iCurrentTotalLength - 1); |
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} |
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} |
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247 |
|
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void CCMacImpl::Reset() |
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{ |
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Mem::FillZ(iE,sizeof(iE)); |
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iCurrentTotalLength =0; |
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// record for Reset, for the next time MacL, UpdateL or FinalL is called as we |
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// cannot leave in Reset. |
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TRAP(iDelayedReset, iCipherImpl->SetIvL(TPtrC8(iE, KMacBlockSize))); |
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} |
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256 |
|
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TPtrC8 CCMacImpl::MacL(const TDesC8& aMessage) |
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{ |
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// Reset the cipher with iE as 128 zero bits as it leaved in previous call to Reset. |
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if (iDelayedReset != KErrNone) |
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261 |
{ |
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// iE was reset to 128 zero bits in previous call to Reset which leaved. |
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iCipherImpl->SetIvL(TPtrC8(iE, KMacBlockSize)); |
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iDelayedReset = KErrNone; |
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} |
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266 |
|
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if (aMessage!=KNullDesC8()) |
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{ |
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DoUpdateL(aMessage); |
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} |
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271 |
|
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// Calculate MAC |
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TPtrC8 macPtr(KNullDesC8()); |
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macPtr.Set(DoFinalL()); |
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275 |
|
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// Restore the internal state. |
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// We don't want to save any state change happened in |
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// DoFinalL. |
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// iE is not updated in DoFinalL function and hence |
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// can be used to reset iCipherImpl to previous state. |
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iCipherImpl->SetIvL(TPtrC8(iE, KMacBlockSize)); |
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282 |
|
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return macPtr; |
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} |
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|
285 |
|
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TPtrC8 CCMacImpl::FinalL(const TDesC8& aMessage) |
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287 |
{ |
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// Reset the cipher with iE as 128 zero bits as it leaved in previous call to Reset. |
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if (iDelayedReset == KErrNone) |
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290 |
{ |
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// iE was reset to 128 zero bits in previous call to Reset which leaved. |
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iCipherImpl->SetIvL(TPtrC8(iE, KMacBlockSize)); |
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iDelayedReset = KErrNone; |
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} |
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|
295 |
|
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if (aMessage!=KNullDesC8()) |
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297 |
{ |
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DoUpdateL(aMessage); |
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299 |
} |
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TPtrC8 macPtr(KNullDesC8()); |
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macPtr.Set(DoFinalL()); |
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Reset(); |
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return macPtr; |
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304 |
} |
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|
305 |
|
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306 |
void CCMacImpl::UpdateL(const TDesC8& aMessage) |
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307 |
{ |
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308 |
// Reset the cipher with iE as 128 zero bits as it leaved in previous call to Reset. |
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|
309 |
if (iDelayedReset == KErrNone) |
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diff
changeset
|
310 |
{ |
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parents:
diff
changeset
|
311 |
// iE was reset to 128 zero bits in previous call to Reset which leaved. |
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Revision: 200935
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parents:
diff
changeset
|
312 |
iCipherImpl->SetIvL(TPtrC8(iE, KMacBlockSize)); |
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Revision: 200935
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parents:
diff
changeset
|
313 |
iDelayedReset = KErrNone; |
35751d3474b7
Revision: 200935
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parents:
diff
changeset
|
314 |
} |
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parents:
diff
changeset
|
315 |
|
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Revision: 200935
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parents:
diff
changeset
|
316 |
if (aMessage!=KNullDesC8()) |
35751d3474b7
Revision: 200935
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parents:
diff
changeset
|
317 |
{ |
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Revision: 200935
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parents:
diff
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|
318 |
DoUpdateL(aMessage); |
35751d3474b7
Revision: 200935
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parents:
diff
changeset
|
319 |
} |
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parents:
diff
changeset
|
320 |
} |
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parents:
diff
changeset
|
321 |
|
35751d3474b7
Revision: 200935
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parents:
diff
changeset
|
322 |
void CCMacImpl::ProcessBlockL() |
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parents:
diff
changeset
|
323 |
{ |
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Revision: 200935
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parents:
diff
changeset
|
324 |
TPtrC8 dataPtr(iData, KMacBlockSize); |
35751d3474b7
Revision: 200935
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parents:
diff
changeset
|
325 |
TPtr8 intermediateCipherPtr(iE,0,KMacBlockSize); |
35751d3474b7
Revision: 200935
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parents:
diff
changeset
|
326 |
// iData (Block) should be XORed with iE calculated |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
327 |
// from previoue processing. If it's the first processing |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
328 |
// then iE will be zero. |
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Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
329 |
// Here we are not doing explicit XORing because iCpherImpl |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
330 |
// is set in CBC mode. Therefore this operation will be |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
331 |
// done by iCipherImpl |
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Revision: 200935
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parents:
diff
changeset
|
332 |
iCipherImpl->ProcessL(dataPtr, intermediateCipherPtr); |
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Revision: 200935
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parents:
diff
changeset
|
333 |
// After processing discard the block. |
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Revision: 200935
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parents:
diff
changeset
|
334 |
iCurrentTotalLength = 0; |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
335 |
} |
35751d3474b7
Revision: 200935
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parents:
diff
changeset
|
336 |
|
35751d3474b7
Revision: 200935
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parents:
diff
changeset
|
337 |
void CCMacImpl::DoUpdateL(const TDesC8& aMessage) |
35751d3474b7
Revision: 200935
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parents:
diff
changeset
|
338 |
{ |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
339 |
TInt curLength = aMessage.Length(); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
340 |
const TUint8* msgPtr = aMessage.Ptr(); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
341 |
|
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
342 |
while(curLength > 0) |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
343 |
{ |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
344 |
// If block is formed then process it. |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
345 |
if(iCurrentTotalLength == KMacBlockSize) |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
346 |
ProcessBlockL(); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
347 |
|
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
348 |
// Check the space left in the block. |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
349 |
TUint remainingLength = KMacBlockSize - iCurrentTotalLength; |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
350 |
// If unprocesed message length is less then remainingLength |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
351 |
// then copy the entire data to iData else copy till iData |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
352 |
// if full. |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
353 |
TUint length = Min(curLength, remainingLength); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
354 |
Mem::Copy(iData+iCurrentTotalLength, msgPtr, length); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
355 |
// Update data offset |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
356 |
iCurrentTotalLength += length; |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
357 |
curLength -= length; |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
358 |
msgPtr += length; |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
359 |
} |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
360 |
} |
35751d3474b7
Revision: 200935
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parents:
diff
changeset
|
361 |
|
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
362 |
TPtrC8 CCMacImpl::DoFinalL() |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
363 |
{ |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
364 |
TBuf8<KMacBlockSize> finalBlock; |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
365 |
finalBlock.SetLength(KMacBlockSize); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
366 |
|
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
367 |
// If padding is required then use Key3 |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
368 |
// else use Key2. |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
369 |
if(iCurrentTotalLength < KMacBlockSize) |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
370 |
{ |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
371 |
PadMessage(); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
372 |
XORKeyWithData(iKey3, finalBlock); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
373 |
} |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
374 |
else |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
375 |
{ |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
376 |
XORKeyWithData(iKey2, finalBlock); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
377 |
} |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
378 |
|
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
379 |
// cipher class expects the output buffer to be empty. |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
380 |
iMacValue.Zero(); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
381 |
|
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
382 |
iCipherImpl->ProcessFinalL(finalBlock, iMacValue); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
383 |
|
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
384 |
return (iImplementationUid == CryptoSpi::KAlgorithmCipherAesXcbcMac96)? iMacValue.Left(KAesXcbcMac96Size): TPtrC8(iMacValue); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
385 |
} |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
386 |
|
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
387 |
void CCMacImpl::ReInitialiseAndSetKeyL(const CKey& aKey) |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
388 |
{ |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
389 |
Reset(); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
390 |
SetKeyL(aKey); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
391 |
} |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
392 |
|
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
393 |
|
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
394 |
CCMacImpl* CCMacImpl::CopyL() |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
395 |
{ |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
396 |
CCMacImpl* clone = new(ELeave) CCMacImpl(*this); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
397 |
CleanupStack::PushL(clone); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
398 |
clone->iKey = CKey::NewL(*iKey); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
399 |
CryptoSpi::CSymmetricCipherFactory::CreateSymmetricCipherL(clone->iCipherImpl, |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
400 |
CryptoSpi::KAesUid, |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
401 |
*iKey, |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
402 |
CryptoSpi::KCryptoModeEncryptUid, |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
403 |
CryptoSpi::KOperationModeCBCUid, |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
404 |
CryptoSpi::KPaddingModeNoneUid, |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
405 |
NULL); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
406 |
clone->iCipherImpl->SetIvL(TPtrC8(clone->iE, KMacBlockSize)); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
407 |
CleanupStack::Pop(); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
408 |
return clone; |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
409 |
} |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
410 |
|
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
411 |
CCMacImpl* CCMacImpl::ReplicateL() |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
412 |
{ |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
413 |
CCMacImpl* replica = CopyL(); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
414 |
replica->Reset(); |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
415 |
return replica; |
35751d3474b7
Revision: 200935
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
416 |
} |