author | Santosh V Patil <santosh.v.patil@nokia.com> |
Tue, 29 Sep 2009 16:08:12 +0530 | |
changeset 6 | 50f2ff6984be |
parent 0 | 2c201484c85f |
permissions | -rw-r--r-- |
0
2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
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parents:
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1 |
/* |
2c201484c85f
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* Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies). |
2c201484c85f
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3 |
* All rights reserved. |
2c201484c85f
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4 |
* This component and the accompanying materials are made available |
2c201484c85f
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5 |
* under the terms of the License "Eclipse Public License v1.0" |
2c201484c85f
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6 |
* which accompanies this distribution, and is available |
2c201484c85f
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
2c201484c85f
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8 |
* |
2c201484c85f
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9 |
* Initial Contributors: |
2c201484c85f
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* Nokia Corporation - initial contribution. |
2c201484c85f
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11 |
* |
2c201484c85f
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* Contributors: |
2c201484c85f
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13 |
* |
2c201484c85f
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* Description: |
2c201484c85f
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* |
2c201484c85f
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*/ |
2c201484c85f
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|
2c201484c85f
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|
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Move the Security package to EPL, and add the implementations of the cryptographic algorithms
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#include "3des.h" |
2c201484c85f
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#include "../common/inlines.h" |
2c201484c85f
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#include "des.inl" |
2c201484c85f
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#include <cryptostrength.h> |
2c201484c85f
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|
2c201484c85f
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const TInt K3DESBlockBytes = 8; |
2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
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const TInt K3DESKeyBytes = 24; |
2c201484c85f
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const TInt KDESKeyBytes = 8; |
2c201484c85f
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|
2c201484c85f
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void C3DES::Transform(TDes8& aBlock) |
2c201484c85f
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{ |
2c201484c85f
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assert(aBlock.Size() == K3DESBlockBytes); |
2c201484c85f
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|
2c201484c85f
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parents:
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TUint32 l, r; |
2c201484c85f
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// Split the block into 2 word-sized big endian portions |
2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
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GetBlockBigEndian((TUint8*)&aBlock[0], l, r); |
2c201484c85f
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parents:
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|
2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
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parents:
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IPerm(l,r); |
2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
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|
2c201484c85f
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DoTransform(l, r, iK1); |
2c201484c85f
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DoTransform(r, l, iK2); |
2c201484c85f
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DoTransform(l, r, iK3); |
2c201484c85f
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|
2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
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FPerm(l,r); |
2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
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|
2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
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44 |
// Put the portions back into the block as little endian |
2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
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45 |
PutBlockBigEndian((TUint8*)&aBlock[0], r, l); |
2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
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} |
2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
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parents:
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|
2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
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48 |
TInt C3DES::BlockSize() const |
2c201484c85f
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{ |
2c201484c85f
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return K3DESBlockBytes; |
2c201484c85f
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} |
2c201484c85f
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|
2c201484c85f
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TInt C3DES::KeySize() const |
2c201484c85f
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{ |
2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
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return K3DESKeyBytes; |
2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
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} |
2c201484c85f
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|
2c201484c85f
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C3DES::C3DES() |
2c201484c85f
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{ |
2c201484c85f
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} |
2c201484c85f
Move the Security package to EPL, and add the implementations of the cryptographic algorithms
Santosh Patil <santosh.v.patil@nokia.com>
parents:
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|
2c201484c85f
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void C3DES::ConstructL(const TDesC8& aKey) |
2c201484c85f
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{ |
2c201484c85f
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assert(aKey.Size() == K3DESKeyBytes); |
2c201484c85f
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|
2c201484c85f
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iKey = aKey.AllocL(); |
2c201484c85f
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DoSetKey(*iKey); |
2c201484c85f
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} |
2c201484c85f
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|
2c201484c85f
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void C3DES::Reset() |
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{ |
2c201484c85f
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DoSetKey(*iKey); |
2c201484c85f
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} |
2c201484c85f
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parents:
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|
2c201484c85f
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/* C3DESEncryptor */ |
2c201484c85f
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|
2c201484c85f
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EXPORT_C C3DESEncryptor* C3DESEncryptor::NewL(const TDesC8& aKey) |
2c201484c85f
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{ |
2c201484c85f
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C3DESEncryptor* me = C3DESEncryptor::NewLC(aKey); |
2c201484c85f
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CleanupStack::Pop(me); |
2c201484c85f
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return (me); |
2c201484c85f
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82 |
} |
2c201484c85f
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83 |
|
2c201484c85f
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EXPORT_C C3DESEncryptor* C3DESEncryptor::NewLC(const TDesC8& aKey) |
2c201484c85f
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85 |
{ |
2c201484c85f
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86 |
C3DESEncryptor* me = new (ELeave) C3DESEncryptor(); |
2c201484c85f
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87 |
CleanupStack::PushL(me); |
2c201484c85f
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88 |
me->ConstructL(aKey); |
2c201484c85f
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89 |
// DES only used 7 bits out of every key byte |
2c201484c85f
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TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()) - aKey.Size()); |
2c201484c85f
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91 |
return (me); |
2c201484c85f
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92 |
} |
2c201484c85f
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93 |
|
2c201484c85f
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94 |
void C3DESEncryptor::DoSetKey(const TDesC8& aKey) |
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95 |
{ |
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96 |
// Encryptor key |
2c201484c85f
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97 |
SetKey(aKey.Mid(0, KDESKeyBytes), iK1); |
2c201484c85f
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98 |
// Decryptor key |
2c201484c85f
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99 |
SetKey(aKey.Mid(KDESKeyBytes, 2*KDESKeyBytes), iK2); |
2c201484c85f
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100 |
ReverseKeySchedule(iK2); // Reverse key schedule order |
2c201484c85f
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101 |
// Encryptor key |
2c201484c85f
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102 |
SetKey(aKey.Mid(2*KDESKeyBytes), iK3); |
2c201484c85f
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103 |
} |
2c201484c85f
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Santosh Patil <santosh.v.patil@nokia.com>
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104 |
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105 |
/* C3DESDecryptor */ |
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106 |
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107 |
EXPORT_C C3DESDecryptor* C3DESDecryptor::NewL(const TDesC8& aKey) |
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108 |
{ |
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109 |
C3DESDecryptor* me = C3DESDecryptor::NewLC(aKey); |
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110 |
CleanupStack::Pop(me); |
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111 |
return (me); |
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112 |
} |
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113 |
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114 |
EXPORT_C C3DESDecryptor* C3DESDecryptor::NewLC(const TDesC8& aKey) |
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115 |
{ |
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116 |
C3DESDecryptor* me = new (ELeave) C3DESDecryptor(); |
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117 |
CleanupStack::PushL(me); |
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118 |
me->ConstructL(aKey); |
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119 |
// DES only used 7 bits out of every key byte |
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120 |
TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()) - aKey.Size()); |
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121 |
return (me); |
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122 |
} |
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123 |
|
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124 |
void C3DESDecryptor::DoSetKey(const TDesC8& aKey) |
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125 |
{ |
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126 |
// 3DES decryption, reverse through key |
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127 |
// Decryptor key |
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128 |
CDES::SetKey(aKey.Mid(2*KDESKeyBytes), iK1); |
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129 |
ReverseKeySchedule(iK1); // Reverse key schedule order |
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130 |
|
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131 |
// Encryptor key |
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132 |
CDES::SetKey(aKey.Mid(KDESKeyBytes, 2*KDESKeyBytes), iK2); |
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133 |
|
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134 |
// Decryptor key |
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135 |
CDES::SetKey(aKey.Mid(0, KDESKeyBytes), iK3); |
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136 |
ReverseKeySchedule(iK3); // Reverse key schedule order |
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137 |
} |