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1 /* |
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2 * Copyright (c) 2002-2009 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 <des.h> |
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20 #include "desshim.h" |
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21 |
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22 const TInt KDESBlockBytes = 8; |
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23 const TInt KDESKeyBytes = 8; |
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24 |
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25 CDES::~CDES() |
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26 { |
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27 } |
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28 |
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29 CDES::CDES() |
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30 { |
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31 } |
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32 |
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33 typedef TUint8 TKeyDES[KDESKeyBytes]; |
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34 const TInt KKnownWeakKeysCount = 16; |
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35 |
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36 const TKeyDES weak_keys[KKnownWeakKeysCount] = |
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37 { |
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38 /* weak keys */ |
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39 {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}, |
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40 {0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE}, |
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41 {0x1E,0x1E,0x1E,0x1E,0x0E,0x0E,0x0E,0x0E}, |
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42 {0xE0,0xE0,0xE0,0xE0,0xF0,0xF0,0xF0,0xF0}, |
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43 {0x00,0xFE,0x00,0xFE,0x00,0xFE,0x00,0xFE}, |
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44 {0xFE,0x00,0xFE,0x00,0xFE,0x00,0xFE,0x00}, |
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45 {0x1E,0xE0,0x1E,0xE0,0x0E,0xF0,0x0E,0xF0}, |
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46 {0xE0,0x1E,0xE0,0x1E,0xF0,0x0E,0xF0,0x0E}, |
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47 {0x00,0xE0,0x00,0xE0,0x00,0xF0,0x00,0xF0}, |
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48 {0xE0,0x00,0xE0,0x00,0xF0,0x00,0xF0,0x00}, |
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49 {0x1E,0xFE,0x1E,0xFE,0x0E,0xFE,0x0E,0xFE}, |
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50 {0xFE,0x1E,0xFE,0x1E,0xFE,0x0E,0xFE,0x0E}, |
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51 {0x00,0x1E,0x00,0x1E,0x00,0x0E,0x00,0x0E}, |
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52 {0x1E,0x00,0x1E,0x00,0x0E,0x00,0x0E,0x00}, |
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53 {0xE0,0xFE,0xE0,0xFE,0xF0,0xFE,0xF0,0xFE}, |
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54 {0xFE,0xE0,0xFE,0xE0,0xFE,0xF0,0xFE,0xF0} |
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55 }; |
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56 |
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57 EXPORT_C TBool CDES::IsWeakKey(const TDesC8& aKey) |
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58 { |
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59 TKeyDES key; |
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60 TInt index = 0; |
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61 //Reset parity bits |
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62 for(; index < KDESKeyBytes; index++) |
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63 { |
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64 key[index] = aKey[index] & 0xFE; |
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65 } |
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66 |
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67 TBool weak = EFalse; |
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68 //Compare key with potential weak keys without parity |
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69 for (index=0; index < KKnownWeakKeysCount; index++) |
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70 { |
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71 if (Mem::Compare(weak_keys[index], KDESKeyBytes, &key[0], KDESKeyBytes)==0) |
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72 { |
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73 weak = ETrue; |
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74 break; |
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75 } |
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76 } |
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77 return weak; |
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78 } |
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79 |
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80 /* CDESEncryptor */ |
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81 EXPORT_C CDESEncryptor* CDESEncryptor::NewL(const TDesC8& aKey, TBool /*aCheckWeakKey*/) |
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82 { |
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83 return CDESEncryptorShim::NewL(aKey); |
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84 } |
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85 |
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86 EXPORT_C CDESEncryptor* CDESEncryptor::NewLC(const TDesC8& aKey, TBool /*aCheckWeakKey*/) |
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87 { |
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88 return CDESEncryptorShim::NewLC(aKey); |
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89 } |
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90 |
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91 CDESEncryptor::CDESEncryptor() |
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92 { |
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93 } |
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94 |
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95 /* CDESDecryptor */ |
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96 EXPORT_C CDESDecryptor* CDESDecryptor::NewL(const TDesC8& aKey, TBool /*aCheckWeakKey*/) |
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97 { |
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98 return CDESDecryptorShim::NewL(aKey); |
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99 } |
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100 |
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101 EXPORT_C CDESDecryptor* CDESDecryptor::NewLC(const TDesC8& aKey, TBool /*aCheckWeakKey*/) |
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102 { |
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103 return CDESDecryptorShim::NewLC(aKey); |
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104 } |
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105 |
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106 CDESDecryptor::CDESDecryptor() |
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107 { |
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108 } |
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109 |
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110 // All these methods have been replaced by the shim |
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111 #ifdef _BullseyeCoverage |
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112 #pragma suppress_warnings on |
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113 #pragma BullseyeCoverage off |
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114 #pragma suppress_warnings off |
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115 #endif |
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116 |
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117 void CDES::Transform(TDes8& /*aBlock*/) |
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118 { |
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119 // Method replaced by shim |
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120 ASSERT(EFalse); |
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121 } |
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122 |
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123 TInt CDES::BlockSize() const |
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124 { |
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125 // Method replaced by shim |
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126 ASSERT(EFalse); |
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127 return KDESBlockBytes; |
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128 } |
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129 |
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130 TInt CDES::KeySize() const |
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131 { |
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132 // Method replaced by shim |
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133 ASSERT(EFalse); |
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134 return KDESKeyBytes; |
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135 } |
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136 |
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137 void CDES::Reset() |
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138 { |
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139 // Method replaced by shim |
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140 ASSERT(EFalse); |
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141 } |
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142 |
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143 void CDES::SetKey(const TDesC8& /*aKey*/, TUint32* /*aKeyBuffer*/) |
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144 { |
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145 // Method replaced by shim |
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146 ASSERT(EFalse); |
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147 } |
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148 |
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149 void CDES::ConstructL(const TDesC8& /*aKey*/, TBool /*aCheckWeakKey*/) |
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150 { |
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151 // Method replaced by shim |
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152 ASSERT(EFalse); |
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153 } |
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154 |
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155 void CDESDecryptor::SetKey(const TDesC8& /*aKey*/, TUint32* /*aKeyBuffer*/) |
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156 { |
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157 // Method replaced by shim |
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158 ASSERT(EFalse); |
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159 } |