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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 * |
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16 */ |
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17 |
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18 |
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19 #include "desshim.h" |
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20 |
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21 #include "cryptosymmetriccipherapi.h" |
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22 #include <cryptospi/cryptospidef.h> |
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23 #include <cryptospi/plugincharacteristics.h> |
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24 #include "keys.h" |
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25 #include <cryptostrength.h> |
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26 |
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27 #include "../common/inlines.h" |
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28 |
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29 using namespace CryptoSpi; |
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30 |
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31 // CDESEncryptorShim //////////////////////////////////////////////////////// |
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32 CDESEncryptorShim* CDESEncryptorShim::NewL(const TDesC8& aKey) |
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33 { |
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34 CDESEncryptorShim* self = CDESEncryptorShim::NewLC(aKey); |
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35 CleanupStack::Pop(self); |
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36 return self; |
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37 } |
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38 |
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39 CDESEncryptorShim* CDESEncryptorShim::NewLC(const TDesC8& aKey) |
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40 { |
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41 CDESEncryptorShim* self = new (ELeave) CDESEncryptorShim(); |
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42 CleanupStack::PushL(self); |
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43 self->ConstructL(aKey); |
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44 // DES only used 7 bits out of every key byte |
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45 TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()) - aKey.Size()); |
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46 return self; |
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47 } |
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48 |
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49 CDESEncryptorShim::CDESEncryptorShim() |
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50 { |
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51 } |
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52 |
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53 CDESEncryptorShim::~CDESEncryptorShim() |
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54 { |
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55 delete iSymmetricCipherImpl; |
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56 delete iKey; |
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57 } |
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58 |
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59 void CDESEncryptorShim::ConstructL(const TDesC8& aKey) |
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60 { |
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61 TKeyProperty keyProperty = {KDesUid, KNullUid, KSymmetricKey, KNonEmbeddedKeyUid}; |
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62 CCryptoParams* keyParam =CCryptoParams::NewLC(); |
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63 keyParam->AddL(aKey, KSymmetricKeyParameterUid); |
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64 iKey=CKey::NewL(keyProperty, *keyParam); |
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65 CleanupStack::PopAndDestroy(keyParam); |
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66 CSymmetricCipherFactory::CreateSymmetricCipherL( |
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67 iSymmetricCipherImpl, |
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68 KDesUid, |
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69 *iKey, |
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70 KCryptoModeEncryptUid, |
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71 KOperationModeECBUid, |
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72 KPaddingModeNoneUid, |
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73 NULL); |
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74 } |
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75 |
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76 TInt CDESEncryptorShim::BlockSize() const |
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77 { |
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78 // SPI returns block size in BITS |
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79 return BitsToBytes(iSymmetricCipherImpl->BlockSize()); |
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80 } |
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81 |
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82 TInt CDESEncryptorShim::KeySize() const |
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83 { |
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84 return iSymmetricCipherImpl->KeySize(); |
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85 } |
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86 |
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87 void CDESEncryptorShim::Transform(TDes8& aBlock) |
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88 { |
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89 iOutputBlock.Zero(); |
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90 TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aBlock, iOutputBlock);) |
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91 aBlock = iOutputBlock; |
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92 } |
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93 |
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94 void CDESEncryptorShim::Reset() |
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95 { |
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96 iSymmetricCipherImpl->Reset(); |
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97 } |
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98 |
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99 TInt CDESEncryptorShim::Extension_(TUint aExtensionId, TAny*& a0, TAny* /*a1*/) |
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100 { |
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101 TInt ret(KErrNotSupported); |
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102 |
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103 if (CryptoSpi::KSymmetricCipherInterface == aExtensionId && iSymmetricCipherImpl) |
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104 { |
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105 a0=iSymmetricCipherImpl; |
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106 ret=KErrNone; |
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107 } |
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108 return ret; |
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109 } |
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110 |
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111 // CDESDecryptorShim //////////////////////////////////////////////////////// |
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112 CDESDecryptorShim* CDESDecryptorShim::NewL(const TDesC8& aKey) |
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113 { |
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114 CDESDecryptorShim* self = CDESDecryptorShim::NewLC(aKey); |
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115 CleanupStack::Pop(self); |
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116 return self; |
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117 } |
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118 |
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119 |
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120 CDESDecryptorShim* CDESDecryptorShim::NewLC(const TDesC8& aKey) |
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121 { |
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122 CDESDecryptorShim* self = new (ELeave) CDESDecryptorShim(); |
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123 CleanupStack::PushL(self); |
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124 self->ConstructL(aKey); |
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125 // DES only used 7 bits out of every key byte |
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126 TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()) - aKey.Size()); |
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127 return self; |
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128 } |
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129 |
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130 CDESDecryptorShim::CDESDecryptorShim() |
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131 { |
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132 } |
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133 |
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134 CDESDecryptorShim::~CDESDecryptorShim() |
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135 { |
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136 delete iSymmetricCipherImpl; |
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137 delete iKey; |
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138 } |
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139 |
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140 |
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141 void CDESDecryptorShim::ConstructL(const TDesC8& aKey) |
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142 { |
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143 TKeyProperty keyProperty = {KDesUid, KNullUid, KSymmetricKey, KNonEmbeddedKeyUid}; |
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144 CCryptoParams* keyParam =CCryptoParams::NewLC(); |
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145 keyParam->AddL(aKey, KSymmetricKeyParameterUid); |
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146 iKey=CKey::NewL(keyProperty, *keyParam); |
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147 CleanupStack::PopAndDestroy(keyParam); |
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148 CSymmetricCipherFactory::CreateSymmetricCipherL( |
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149 iSymmetricCipherImpl, |
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150 KDesUid, |
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151 *iKey, |
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152 KCryptoModeDecryptUid, |
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153 KOperationModeECBUid, |
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154 KPaddingModeNoneUid, |
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155 NULL); |
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156 } |
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157 |
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158 TInt CDESDecryptorShim::BlockSize() const |
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159 { |
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160 // SPI returns block size in BITS |
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161 return BitsToBytes(iSymmetricCipherImpl->BlockSize()); |
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162 } |
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163 |
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164 TInt CDESDecryptorShim::KeySize() const |
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165 { |
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166 return iSymmetricCipherImpl->KeySize(); |
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167 } |
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168 |
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169 void CDESDecryptorShim::Transform(TDes8& aBlock) |
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170 { |
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171 iOutputBlock.Zero(); |
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172 TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aBlock, iOutputBlock);) |
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173 aBlock = iOutputBlock; |
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174 } |
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175 |
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176 void CDESDecryptorShim::Reset() |
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177 { |
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178 iSymmetricCipherImpl->Reset(); |
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179 } |
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180 |
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181 TInt CDESDecryptorShim::Extension_(TUint aExtensionId, TAny*& a0, TAny* /*a1*/) |
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182 { |
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183 TInt ret(KErrNotSupported); |
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184 |
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185 if (CryptoSpi::KSymmetricCipherInterface == aExtensionId && iSymmetricCipherImpl) |
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186 { |
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187 a0=iSymmetricCipherImpl; |
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188 ret=KErrNone; |
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189 } |
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190 return ret; |
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191 } |