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1 /* |
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2 * Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of the License "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * blocktransformationshim.cpp |
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16 * |
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17 */ |
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18 |
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19 |
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20 #include "bufferedtransformationshim.h" |
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21 |
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22 #include <cryptospi/cryptospidef.h> |
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23 #include <padding.h> |
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24 #include "cryptosymmetriccipherapi.h" |
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25 #include <cryptospi/plugincharacteristics.h> |
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26 #include "../common/inlines.h" |
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27 |
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28 // CBufferedEncryptorShim |
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29 CBufferedEncryptorShim::CBufferedEncryptorShim(CryptoSpi::CSymmetricCipher* aSymmetricCipherImpl) : |
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30 iSymmetricCipherImpl(aSymmetricCipherImpl) |
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31 { |
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32 } |
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33 |
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34 CBufferedEncryptorShim* CBufferedEncryptorShim::NewL(CBlockTransformation* aBT, CPadding* aPadding) |
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35 { |
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36 CBufferedEncryptorShim* self(0); |
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37 |
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38 // Check whether the block transform contains an SPI plug-in |
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39 TAny* implPtr(0); |
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40 TInt err = aBT->GetExtension(CryptoSpi::KSymmetricCipherInterface, implPtr, NULL); |
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41 if (err == KErrNone && implPtr) |
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42 { |
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43 CryptoSpi::CSymmetricCipher* impl(static_cast<CryptoSpi::CSymmetricCipher*>(implPtr)); |
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44 |
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45 const CryptoSpi::TCharacteristics* c(0); |
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46 impl->GetCharacteristicsL(c); |
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47 |
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48 const CryptoSpi::TSymmetricCipherCharacteristics* cipherCharacteristics( |
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49 static_cast<const CryptoSpi::TSymmetricCipherCharacteristics*>(c)); |
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50 |
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51 // See if the padding mode is recognised by CryptoSpi and if so, check |
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52 // whether the plug-in supports that padding mode. |
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53 TUid paddingMode; |
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54 TAny* paddingPtr = &paddingMode; |
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55 err = aPadding->GetExtension(CryptoSpi::KPaddingInterface, paddingPtr, 0); |
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56 if (err == KErrNone && cipherCharacteristics->IsPaddingModeSupported(paddingMode)) |
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57 { |
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58 impl->SetCryptoModeL(CryptoSpi::KCryptoModeEncryptUid); |
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59 impl->SetPaddingModeL(paddingMode); |
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60 self = new(ELeave) CBufferedEncryptorShim(impl); |
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61 CleanupStack::PushL(self); |
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62 self->ConstructL(aBT, aPadding); |
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63 CleanupStack::Pop(self); |
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64 } |
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65 } |
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66 return self; |
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67 } |
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68 |
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69 void CBufferedEncryptorShim::ConstructL(CBlockTransformation* aBT, CPadding* aPadding) |
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70 { |
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71 CBufferedEncryptor::ConstructL(aBT, aPadding); |
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72 } |
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73 |
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74 void CBufferedEncryptorShim::Process(const TDesC8& aInput, TDes8& aOutput) |
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75 { |
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76 TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aInput, aOutput);) |
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77 } |
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78 |
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79 TInt CBufferedEncryptorShim::MaxOutputLength(TInt aInputLength) const |
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80 { |
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81 return iSymmetricCipherImpl->MaxOutputLength(aInputLength); |
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82 } |
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83 |
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84 void CBufferedEncryptorShim::Reset() |
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85 { |
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86 iSymmetricCipherImpl->Reset(); |
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87 } |
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88 |
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89 TInt CBufferedEncryptorShim::BlockSize() const |
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90 { |
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91 return BitsToBytes(iSymmetricCipherImpl->BlockSize()); |
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92 } |
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93 |
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94 TInt CBufferedEncryptorShim::KeySize() const |
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95 { |
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96 return iSymmetricCipherImpl->KeySize(); |
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97 } |
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98 |
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99 void CBufferedEncryptorShim::ProcessFinalL(const TDesC8& aInput, TDes8& aOutput) |
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100 { |
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101 iSymmetricCipherImpl->ProcessFinalL(aInput, aOutput); |
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102 } |
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103 |
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104 TInt CBufferedEncryptorShim::MaxFinalOutputLength(TInt aInputLength) const |
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105 { |
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106 return iSymmetricCipherImpl->MaxFinalOutputLength(aInputLength); |
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107 } |
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108 |
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109 // CBufferedDecryptorShim |
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110 CBufferedDecryptorShim::CBufferedDecryptorShim(CryptoSpi::CSymmetricCipher* aSymmetricCipherImpl) : |
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111 iSymmetricCipherImpl(aSymmetricCipherImpl) |
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112 { |
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113 } |
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114 |
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115 CBufferedDecryptorShim* CBufferedDecryptorShim::NewL(CBlockTransformation* aBT, CPadding* aPadding) |
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116 { |
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117 CBufferedDecryptorShim* self(0); |
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118 |
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119 // Check whether the block transform contains an SPI plug-in |
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120 TAny* implPtr(0); |
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121 TInt err = aBT->GetExtension(CryptoSpi::KSymmetricCipherInterface, implPtr, NULL); |
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122 if (err == KErrNone && implPtr) |
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123 { |
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124 CryptoSpi::CSymmetricCipher* impl(static_cast<CryptoSpi::CSymmetricCipher*>(implPtr)); |
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125 |
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126 const CryptoSpi::TCharacteristics* c(0); |
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127 impl->GetCharacteristicsL(c); |
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128 |
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129 const CryptoSpi::TSymmetricCipherCharacteristics* cipherCharacteristics( |
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130 static_cast<const CryptoSpi::TSymmetricCipherCharacteristics*>(c)); |
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131 |
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132 // See if the padding mode is recognised by CryptoSpi and if so, check |
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133 // whether the plug-in supports that padding mode. |
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134 TUid paddingMode; |
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135 TAny* paddingPtr = &paddingMode; |
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136 err = aPadding->GetExtension(CryptoSpi::KPaddingInterface, paddingPtr, 0); |
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137 if (err == KErrNone && cipherCharacteristics->IsPaddingModeSupported(paddingMode)) |
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138 { |
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139 impl->SetCryptoModeL(CryptoSpi::KCryptoModeDecryptUid); |
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140 impl->SetPaddingModeL(paddingMode); |
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141 |
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142 self = new(ELeave) CBufferedDecryptorShim(impl); |
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143 CleanupStack::PushL(self); |
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144 self->ConstructL(aBT, aPadding); |
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145 CleanupStack::Pop(self); |
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146 } |
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147 } |
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148 return self; |
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149 } |
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150 |
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151 void CBufferedDecryptorShim::ConstructL(CBlockTransformation* aBT, CPadding* aPadding) |
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152 { |
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153 CBufferedDecryptor::ConstructL(aBT, aPadding); |
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154 } |
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155 |
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156 void CBufferedDecryptorShim::Process(const TDesC8& aInput, TDes8& aOutput) |
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157 { |
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158 TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aInput, aOutput);) |
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159 } |
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160 |
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161 TInt CBufferedDecryptorShim::MaxOutputLength(TInt aInputLength) const |
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162 { |
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163 return iSymmetricCipherImpl->MaxOutputLength(aInputLength); |
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164 } |
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165 |
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166 void CBufferedDecryptorShim::Reset() |
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167 { |
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168 iSymmetricCipherImpl->Reset(); |
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169 } |
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170 |
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171 TInt CBufferedDecryptorShim::BlockSize() const |
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172 { |
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173 return BitsToBytes(iSymmetricCipherImpl->BlockSize()); |
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174 } |
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175 |
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176 TInt CBufferedDecryptorShim::KeySize() const |
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177 { |
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178 return iSymmetricCipherImpl->KeySize(); |
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179 } |
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180 |
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181 void CBufferedDecryptorShim::ProcessFinalL(const TDesC8& aInput, TDes8& aOutput) |
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182 { |
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183 iSymmetricCipherImpl->ProcessFinalL(aInput, aOutput); |
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184 } |
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185 |
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186 TInt CBufferedDecryptorShim::MaxFinalOutputLength(TInt aInputLength) const |
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187 { |
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188 return iSymmetricCipherImpl->MaxFinalOutputLength(aInputLength); |
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189 } |