|
1 /* |
|
2 * Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies). |
|
3 * All rights reserved. |
|
4 * This component and the accompanying materials are made available |
|
5 * under the terms of the License "Eclipse Public License v1.0" |
|
6 * which accompanies this distribution, and is available |
|
7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
8 * |
|
9 * Initial Contributors: |
|
10 * Nokia Corporation - initial contribution. |
|
11 * |
|
12 * Contributors: |
|
13 * |
|
14 * Description: |
|
15 * |
|
16 */ |
|
17 |
|
18 |
|
19 #include "3desshim.h" |
|
20 |
|
21 #include "cryptosymmetriccipherapi.h" |
|
22 #include <cryptospi/cryptospidef.h> |
|
23 #include <cryptospi/plugincharacteristics.h> |
|
24 #include "keys.h" |
|
25 #include <cryptostrength.h> |
|
26 #include "../common/inlines.h" |
|
27 |
|
28 using namespace CryptoSpi; |
|
29 |
|
30 // C3DESEncryptorShim //////////////////////////////////////////////////////// |
|
31 C3DESEncryptorShim* C3DESEncryptorShim::NewL(const TDesC8& aKey) |
|
32 { |
|
33 C3DESEncryptorShim* self = C3DESEncryptorShim::NewLC(aKey); |
|
34 CleanupStack::Pop(self); |
|
35 return self; |
|
36 } |
|
37 |
|
38 C3DESEncryptorShim* C3DESEncryptorShim::NewLC(const TDesC8& aKey) |
|
39 { |
|
40 C3DESEncryptorShim* self = new (ELeave) C3DESEncryptorShim(); |
|
41 CleanupStack::PushL(self); |
|
42 self->ConstructL(aKey); |
|
43 // DES only used 7 bits out of every key byte |
|
44 TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()) - aKey.Size()); |
|
45 return self; |
|
46 } |
|
47 |
|
48 C3DESEncryptorShim::C3DESEncryptorShim() |
|
49 { |
|
50 } |
|
51 |
|
52 C3DESEncryptorShim::~C3DESEncryptorShim() |
|
53 { |
|
54 delete iSymmetricCipherImpl; |
|
55 delete iKey; |
|
56 } |
|
57 |
|
58 void C3DESEncryptorShim::ConstructL(const TDesC8& aKey) |
|
59 { |
|
60 TKeyProperty keyProperty = {K3DesUid, KNullUid, KSymmetricKey, KNonEmbeddedKeyUid}; |
|
61 CCryptoParams* keyParam =CCryptoParams::NewLC(); |
|
62 keyParam->AddL(aKey, KSymmetricKeyParameterUid); |
|
63 iKey=CKey::NewL(keyProperty, *keyParam); |
|
64 CleanupStack::PopAndDestroy(keyParam); |
|
65 |
|
66 CSymmetricCipherFactory::CreateSymmetricCipherL( |
|
67 iSymmetricCipherImpl, |
|
68 K3DesUid, |
|
69 *iKey, |
|
70 KCryptoModeEncryptUid, |
|
71 KOperationModeECBUid, |
|
72 KPaddingModeNoneUid, |
|
73 NULL); |
|
74 } |
|
75 |
|
76 TInt C3DESEncryptorShim::BlockSize() const |
|
77 { |
|
78 // SPI returns block size in BITS |
|
79 return iSymmetricCipherImpl->BlockSize() >> 3; |
|
80 } |
|
81 |
|
82 TInt C3DESEncryptorShim::KeySize() const |
|
83 { |
|
84 return iSymmetricCipherImpl->KeySize(); |
|
85 } |
|
86 |
|
87 void C3DESEncryptorShim::Transform(TDes8& aBlock) |
|
88 { |
|
89 iOutputBlock.Zero(); |
|
90 TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aBlock, iOutputBlock);) |
|
91 aBlock = iOutputBlock; |
|
92 } |
|
93 |
|
94 void C3DESEncryptorShim::Reset() |
|
95 { |
|
96 iSymmetricCipherImpl->Reset(); |
|
97 } |
|
98 |
|
99 TInt C3DESEncryptorShim::Extension_(TUint aExtensionId, TAny*& a0, TAny* /*a1*/) |
|
100 { |
|
101 TInt ret(KErrExtensionNotSupported); |
|
102 |
|
103 if (CryptoSpi::KSymmetricCipherInterface == aExtensionId && iSymmetricCipherImpl) |
|
104 { |
|
105 a0=iSymmetricCipherImpl; |
|
106 ret=KErrNone; |
|
107 } |
|
108 return ret; |
|
109 } |
|
110 |
|
111 // C3DESDecryptorShim //////////////////////////////////////////////////////// |
|
112 C3DESDecryptorShim* C3DESDecryptorShim::NewL(const TDesC8& aKey) |
|
113 { |
|
114 C3DESDecryptorShim* self = C3DESDecryptorShim::NewLC(aKey); |
|
115 CleanupStack::Pop(self); |
|
116 return self; |
|
117 } |
|
118 |
|
119 |
|
120 C3DESDecryptorShim* C3DESDecryptorShim::NewLC(const TDesC8& aKey) |
|
121 { |
|
122 C3DESDecryptorShim* self = new (ELeave) C3DESDecryptorShim(); |
|
123 CleanupStack::PushL(self); |
|
124 self->ConstructL(aKey); |
|
125 // DES only used 7 bits out of every key byte |
|
126 TCrypto::IsSymmetricWeakEnoughL(BytesToBits(aKey.Size()) - aKey.Size()); |
|
127 return self; |
|
128 } |
|
129 |
|
130 C3DESDecryptorShim::C3DESDecryptorShim() |
|
131 { |
|
132 } |
|
133 |
|
134 C3DESDecryptorShim::~C3DESDecryptorShim() |
|
135 { |
|
136 delete iSymmetricCipherImpl; |
|
137 delete iKey; |
|
138 } |
|
139 |
|
140 |
|
141 void C3DESDecryptorShim::ConstructL(const TDesC8& aKey) |
|
142 { |
|
143 TKeyProperty keyProperty = {K3DesUid, KNullUid, KSymmetricKey, KNonEmbeddedKeyUid}; |
|
144 CCryptoParams* keyParam =CCryptoParams::NewLC(); |
|
145 keyParam->AddL(aKey, KSymmetricKeyParameterUid); |
|
146 iKey=CKey::NewL(keyProperty, *keyParam); |
|
147 CleanupStack::PopAndDestroy(keyParam); |
|
148 CSymmetricCipherFactory::CreateSymmetricCipherL( |
|
149 iSymmetricCipherImpl, |
|
150 K3DesUid, |
|
151 *iKey, |
|
152 KCryptoModeDecryptUid, |
|
153 KOperationModeECBUid, |
|
154 KPaddingModeNoneUid, |
|
155 NULL); |
|
156 } |
|
157 |
|
158 TInt C3DESDecryptorShim::BlockSize() const |
|
159 { |
|
160 // SPI returns block size in BITS |
|
161 return BitsToBytes(iSymmetricCipherImpl->BlockSize()); |
|
162 } |
|
163 |
|
164 TInt C3DESDecryptorShim::KeySize() const |
|
165 { |
|
166 return iSymmetricCipherImpl->KeySize(); |
|
167 } |
|
168 |
|
169 void C3DESDecryptorShim::Transform(TDes8& aBlock) |
|
170 { |
|
171 iOutputBlock.Zero(); |
|
172 TRAP_IGNORE(iSymmetricCipherImpl->ProcessL(aBlock, iOutputBlock);) |
|
173 aBlock = iOutputBlock; |
|
174 } |
|
175 |
|
176 void C3DESDecryptorShim::Reset() |
|
177 { |
|
178 iSymmetricCipherImpl->Reset(); |
|
179 } |
|
180 |
|
181 TInt C3DESDecryptorShim::Extension_(TUint aExtensionId, TAny*& a0, TAny* /*a1*/) |
|
182 { |
|
183 TInt ret(KErrExtensionNotSupported); |
|
184 |
|
185 if (CryptoSpi::KSymmetricCipherInterface == aExtensionId && iSymmetricCipherImpl) |
|
186 { |
|
187 a0=iSymmetricCipherImpl; |
|
188 ret=KErrNone; |
|
189 } |
|
190 return ret; |
|
191 } |