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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 * DES shim classes definition |
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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 /** |
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21 @file |
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22 @internalComponent |
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23 @released |
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24 */ |
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25 |
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26 #ifndef __DESSHIM_H__ |
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27 #define __DESSHIM_H__ |
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28 |
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29 #include <des.h> |
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30 |
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31 namespace CryptoSpi |
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32 { |
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33 class CSymmetricCipher; |
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34 class CKey; |
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35 } |
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36 |
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37 NONSHARABLE_CLASS(CDESEncryptorShim) : public CDESEncryptor |
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38 { |
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39 public: |
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40 /** |
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41 Creates an CDESEncryptorShim object which has the same interface |
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42 as DESEncryptor but delegates all work to a Crypto SPI plug-in. |
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43 |
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44 @param aKey The encryption key |
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45 @return A pointer to a CDESEncryptorShim instance |
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46 */ |
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47 static CDESEncryptorShim* NewL(const TDesC8& aKey); |
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48 |
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49 /** |
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50 Creates an CDESEncryptorShim object which has the same interface |
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51 as DESEncryptor but delegates all work to a Crypto SPI plug-in. |
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52 |
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53 A pointer to the new object is placed on the cleanup stack |
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54 |
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55 @param aKey The encryption key |
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56 @return A pointer to a CDESEncryptorShim instance |
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57 */ |
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58 static CDESEncryptorShim* NewLC(const TDesC8& aKey); |
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59 |
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60 // From CBlockTransform |
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61 TInt BlockSize() const; |
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62 void Transform(TDes8& aBlock); |
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63 void Reset(void); |
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64 TInt KeySize(void) const; |
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65 |
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66 /// Destructor |
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67 ~CDESEncryptorShim(); |
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68 |
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69 private: |
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70 /// Constructor |
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71 CDESEncryptorShim(); |
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72 void ConstructL(const TDesC8& aKey); |
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73 |
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74 // From CBase |
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75 TInt Extension_(TUint aExtensionId, TAny*& a0, TAny* a1); |
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76 |
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77 private: |
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78 /// SPI delegate |
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79 CryptoSpi::CSymmetricCipher* iSymmetricCipherImpl; |
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80 |
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81 /// SPI requires all key to passed as key-objects |
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82 CryptoSpi::CKey* iKey; |
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83 |
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84 /// Temporary output block, SPI does not overwrite input |
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85 /// DES uses 64bit blocks |
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86 TBuf8<16> iOutputBlock; |
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87 }; |
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88 |
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89 NONSHARABLE_CLASS(CDESDecryptorShim) : public CDESDecryptor |
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90 { |
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91 public: |
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92 /** |
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93 Creates an CDESDecryptorShim object which has the same interface |
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94 as DESDecryptor but delegates all work to a Crypto SPI plug-in. |
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95 |
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96 @param aKey The decryption key |
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97 @return A pointer to a CDESDecryptorShim instance |
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98 */ |
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99 static CDESDecryptorShim* NewL(const TDesC8& aKey); |
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100 |
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101 /** |
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102 Creates an CDESDecryptorShim object which has the same interface |
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103 as DESDecryptor but delegates all work to a Crypto SPI plug-in. |
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104 |
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105 A pointer to the new object is placed on the cleanup stack |
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106 |
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107 @param aKey The decryption key |
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108 @return A pointer to a CDESDecryptorShim instance |
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109 */ |
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110 static CDESDecryptorShim* NewLC(const TDesC8& aKey); |
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111 |
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112 // From CBlockTransform |
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113 TInt BlockSize() const; |
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114 void Transform(TDes8& aBlock); |
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115 void Reset(void); |
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116 TInt KeySize(void) const; |
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117 |
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118 /// Destructor |
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119 ~CDESDecryptorShim(); |
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120 |
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121 private: |
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122 /// Constructor |
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123 CDESDecryptorShim(); |
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124 void ConstructL(const TDesC8& aKey); |
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125 |
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126 /** |
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127 From CBase, to allow CBufferedTransform & CBlockChainingMode |
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128 to determine whether the functionality may be delegated to |
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129 the SPI object. |
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130 */ |
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131 TInt Extension_(TUint aExtensionId, TAny*& a0, TAny* a1); |
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132 |
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133 private: |
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134 /// SPI delegate |
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135 CryptoSpi::CSymmetricCipher* iSymmetricCipherImpl; |
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136 |
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137 /// SPI requires all key to passed as key-objects |
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138 CryptoSpi::CKey* iKey; |
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139 |
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140 /// Temporary output block, SPI does not overwrite input |
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141 /// DES uses 64bit blocks |
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142 TBuf8<16> iOutputBlock; |
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143 }; |
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144 |
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145 #endif // __DESSHIM_H__ |