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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 <e32def.h> |
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20 #include "keys.h" |
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21 #include "asymmetriccipherimpl.h" |
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22 #include <cryptostrength.h> |
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23 #include <cryptospi/cryptospidef.h> |
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24 #include <cryptospi/plugincharacteristics.h> |
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25 #include "pluginconfig.h" |
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26 #include "common/inlines.h" |
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27 |
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28 using namespace SoftwareCrypto; |
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29 |
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30 CAsymmetricCipherImpl::CAsymmetricCipherImpl( |
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31 TUid aCryptoMode, |
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32 TUid aPaddingMode) : |
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33 iCryptoMode(aCryptoMode), |
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34 iPaddingMode(aPaddingMode) |
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35 { |
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36 } |
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37 |
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38 void CAsymmetricCipherImpl::ConstructL(const CKey& aKey) |
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39 { |
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40 DoSetCryptoModeL(iCryptoMode); |
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41 DoSetKeyL(aKey); |
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42 DoSetPaddingModeL(iPaddingMode); |
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43 } |
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44 |
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45 CAsymmetricCipherImpl::~CAsymmetricCipherImpl() |
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46 { |
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47 delete iKey; |
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48 delete iPadding; |
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49 } |
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50 |
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51 void CAsymmetricCipherImpl::Close() |
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52 { |
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53 delete this; |
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54 } |
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55 |
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56 void CAsymmetricCipherImpl::Reset() |
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57 { |
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58 } |
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59 |
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60 TAny* CAsymmetricCipherImpl::GetExtension(TUid /*aExtensionId*/) |
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61 { |
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62 return 0; |
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63 } |
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64 |
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65 void CAsymmetricCipherImpl::GetCharacteristicsL(const TAny*& aPluginCharacteristics) |
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66 { |
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67 TInt numCiphers = sizeof(KAsymmetricCipherCharacteristics)/sizeof(TAsymmetricCipherCharacteristics*); |
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68 TInt32 implUid = ImplementationUid().iUid; |
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69 for (TInt i = 0; i < numCiphers; ++i) |
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70 { |
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71 if (KAsymmetricCipherCharacteristics[i]->cmn.iImplementationUID == implUid) |
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72 { |
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73 aPluginCharacteristics = KAsymmetricCipherCharacteristics[i]; |
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74 break; |
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75 } |
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76 } |
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77 } |
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78 |
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79 void CAsymmetricCipherImpl::SetKeyL(const CKey& aKey) |
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80 { |
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81 DoSetKeyL(aKey); |
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82 } |
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83 |
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84 void CAsymmetricCipherImpl::DoSetKeyL(const CKey& aKey) |
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85 { |
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86 delete iKey; // delete any previous key |
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87 iKey = CKey::NewL(aKey); |
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88 } |
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89 |
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90 void CAsymmetricCipherImpl::SetCryptoModeL(TUid aCryptoMode) |
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91 { |
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92 DoSetCryptoModeL(aCryptoMode); |
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93 Reset(); |
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94 } |
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95 |
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96 void CAsymmetricCipherImpl::DoSetCryptoModeL(TUid aCryptoMode) |
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97 { |
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98 switch (aCryptoMode.iUid) |
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99 { |
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100 case KCryptoModeEncrypt: |
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101 case KCryptoModeDecrypt: |
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102 break; |
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103 default: |
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104 User::Leave(KErrNotSupported); |
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105 } |
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106 iCryptoMode = aCryptoMode; |
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107 } |
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108 |
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109 void CAsymmetricCipherImpl::SetPaddingModeL(TUid aPaddingMode) |
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110 { |
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111 DoSetPaddingModeL(aPaddingMode); |
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112 Reset(); |
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113 } |
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114 |
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115 void CAsymmetricCipherImpl::DoSetPaddingModeL(TUid aPaddingMode) |
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116 { |
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117 CPadding* padding(0); |
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118 TInt padlength = 0; |
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119 |
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120 switch (iCryptoMode.iUid) |
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121 { |
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122 case KCryptoModeEncrypt: |
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123 padlength = GetMaximumOutputLengthL(); |
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124 break; |
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125 case KCryptoModeDecrypt: |
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126 padlength = GetMaximumInputLengthL(); |
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127 break; |
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128 } |
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129 |
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130 switch (aPaddingMode.iUid) |
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131 { |
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132 case KPaddingModeNone: |
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133 padding = CPaddingNone::NewL(padlength); |
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134 break; |
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135 case KPaddingModePkcs1_v1_5_Encryption: |
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136 padding = CPaddingPKCS1Encryption::NewL(padlength); |
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137 break; |
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138 default: |
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139 User::Leave(KErrNotSupported); |
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140 } |
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141 |
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142 delete iPadding; |
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143 iPadding = padding; |
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144 iPaddingMode = aPaddingMode; |
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145 } |
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146 |
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147 // Methods implemented in subclass. No coverage here. |
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148 #ifdef _BullseyeCoverage |
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149 #pragma suppress_warnings on |
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150 #pragma BullseyeCoverage off |
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151 #pragma suppress_warnings off |
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152 #endif |
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153 TInt CAsymmetricCipherImpl::GetMaximumOutputLengthL() const |
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154 { |
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155 // Override in subclass |
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156 User::Leave(KErrNotSupported); |
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157 return 0; |
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158 } |
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159 |
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160 TInt CAsymmetricCipherImpl::GetMaximumInputLengthL() const |
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161 { |
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162 // Override in subclass |
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163 User::Leave(KErrNotSupported); |
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164 return 0; |
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165 } |
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166 |