|
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 * software hmac implementation |
|
16 * software hmac implementation |
|
17 * |
|
18 */ |
|
19 |
|
20 |
|
21 /** |
|
22 @file |
|
23 */ |
|
24 |
|
25 #include "hmacimpl.h" |
|
26 #include "pluginconfig.h" |
|
27 #include "md2impl.h" |
|
28 #include "md5impl.h" |
|
29 #include "sha1impl.h" |
|
30 #include "keys.h" |
|
31 #include "md4impl.h" |
|
32 |
|
33 |
|
34 using namespace SoftwareCrypto; |
|
35 |
|
36 CHMacImpl* CHMacImpl::NewL(const CKey& aKey, MSoftwareHash* aHash) |
|
37 { |
|
38 CHMacImpl* self=NewLC(aKey, aHash); |
|
39 CleanupStack::Pop(); |
|
40 return self; |
|
41 } |
|
42 |
|
43 CHMacImpl* CHMacImpl::NewLC(const CKey& aKey, MSoftwareHash* aHash) |
|
44 { |
|
45 CHMacImpl* self=new(ELeave) CHMacImpl(); |
|
46 CleanupStack::PushL(self); |
|
47 self->ConstructL(aKey, aHash); |
|
48 return self; |
|
49 } |
|
50 |
|
51 CHMacImpl* CHMacImpl::NewL(MSoftwareHash* aHash) |
|
52 { |
|
53 CHMacImpl* self=NewLC(aHash); |
|
54 CleanupStack::Pop(); |
|
55 return self; |
|
56 } |
|
57 |
|
58 CHMacImpl* CHMacImpl::NewLC(MSoftwareHash* aHash) |
|
59 { |
|
60 CHMacImpl* self=new(ELeave) CHMacImpl(); |
|
61 CleanupStack::PushL(self); |
|
62 self->ConstructL(aHash); |
|
63 return self; |
|
64 } |
|
65 |
|
66 |
|
67 CHMacImpl::CHMacImpl() |
|
68 { |
|
69 } |
|
70 |
|
71 CHMacImpl::CHMacImpl(const CHMacImpl& aMD) |
|
72 : iDigest(NULL), iInnerPad(aMD.iInnerPad), |
|
73 iOuterPad(aMD.iOuterPad), iBlockSize(aMD.iBlockSize) |
|
74 { |
|
75 } |
|
76 |
|
77 CHMacImpl::~CHMacImpl() |
|
78 { |
|
79 if (iDigest) |
|
80 { |
|
81 iDigest->Close(); |
|
82 } |
|
83 } |
|
84 |
|
85 void CHMacImpl::ConstructL(const CKey& aKey, MSoftwareHash* aHash) |
|
86 { |
|
87 //Clone the hash implementation |
|
88 iDigest=static_cast<MSoftwareHash*>(aHash->ReplicateL()); |
|
89 InitBlockSizeL(); |
|
90 const TDesC8& keyContent=aKey.GetTDesC8L(KHmacKeyParameterUid); |
|
91 Initialise(keyContent); |
|
92 } |
|
93 |
|
94 void CHMacImpl::ConstructL(MSoftwareHash* aHash) |
|
95 { |
|
96 //Clone the hash implementation |
|
97 iDigest=static_cast<MSoftwareHash*>(aHash->ReplicateL()); |
|
98 InitBlockSizeL(); |
|
99 } |
|
100 |
|
101 void CHMacImpl::InitBlockSizeL() |
|
102 { |
|
103 const TCharacteristics* ptr(NULL); |
|
104 iDigest->GetCharacteristicsL(ptr); |
|
105 const THashCharacteristics* hashPtr=static_cast<const THashCharacteristics*>(ptr); |
|
106 iBlockSize = hashPtr->iBlockSize/8; |
|
107 |
|
108 iInnerPad.SetLength(iBlockSize); |
|
109 iOuterPad.SetLength(iBlockSize); |
|
110 iInnerPadCopy.SetLength(iBlockSize); |
|
111 iOuterPadCopy.SetLength(iBlockSize); |
|
112 } |
|
113 |
|
114 void CHMacImpl::Initialise(const TDesC8& aKey) |
|
115 { |
|
116 // initialisation |
|
117 if (iDigest) |
|
118 { |
|
119 iDigest->Reset(); |
|
120 if( (TUint32)aKey.Size() > iBlockSize) |
|
121 { |
|
122 iInnerPad = iDigest->Final(aKey); |
|
123 } |
|
124 else |
|
125 { |
|
126 iInnerPad = aKey; |
|
127 } |
|
128 |
|
129 TUint i; |
|
130 for (i=iInnerPad.Size();i<iBlockSize;i++) |
|
131 iInnerPad.Append(0); |
|
132 |
|
133 iOuterPad=iInnerPad; |
|
134 |
|
135 const TUint8 Magic1=0x36, Magic2=0x5c; |
|
136 for (i=0;i<iBlockSize;i++) |
|
137 { |
|
138 iInnerPad[i]^=Magic1; |
|
139 iOuterPad[i]^=Magic2; |
|
140 } |
|
141 //start inner hash |
|
142 iDigest->Hash(iInnerPad); |
|
143 } |
|
144 } |
|
145 |
|
146 MHash* CHMacImpl::CopyL() |
|
147 { |
|
148 CHMacImpl* that=new(ELeave) CHMacImpl(*this); |
|
149 CleanupStack::PushL(that); |
|
150 that->iDigest=iDigest ? static_cast<MSoftwareHash*>(iDigest->CopyL()) : NULL; |
|
151 CleanupStack::Pop(); |
|
152 return that; |
|
153 } |
|
154 |
|
155 MHash* CHMacImpl::ReplicateL() |
|
156 { |
|
157 CHMacImpl* that=new(ELeave) CHMacImpl(*this); |
|
158 CleanupStack::PushL(that); |
|
159 that->iDigest=iDigest ? static_cast<MSoftwareHash*>(iDigest->ReplicateL()) : NULL; |
|
160 that->Reset(); |
|
161 CleanupStack::Pop(); |
|
162 return that; |
|
163 } |
|
164 |
|
165 void CHMacImpl::Reset() |
|
166 { |
|
167 if (iDigest) |
|
168 { |
|
169 iDigest->Reset(); |
|
170 iDigest->Update(iInnerPad); |
|
171 } |
|
172 } |
|
173 |
|
174 TPtrC8 CHMacImpl::Hash(const TDesC8& aMessage) |
|
175 { |
|
176 TPtrC8 ptr(KNullDesC8()); |
|
177 TPtrC8 finalPtr(KNullDesC8()); |
|
178 StoreState(); |
|
179 if (iDigest) |
|
180 { |
|
181 ptr.Set(iDigest->Final(aMessage)); |
|
182 iDigest->Update(iOuterPad); |
|
183 finalPtr.Set(iDigest->Final(ptr)); |
|
184 } |
|
185 |
|
186 RestoreState(); |
|
187 |
|
188 if(iDigest) |
|
189 { |
|
190 iDigest->Update(aMessage); |
|
191 } |
|
192 |
|
193 |
|
194 |
|
195 return (finalPtr); |
|
196 } |
|
197 |
|
198 void CHMacImpl::Update(const TDesC8& aMessage) |
|
199 { |
|
200 if(iDigest) |
|
201 { |
|
202 iDigest->Update(aMessage); |
|
203 } |
|
204 } |
|
205 |
|
206 TPtrC8 CHMacImpl::Final(const TDesC8& aMessage) |
|
207 { |
|
208 TPtrC8 ptr(KNullDesC8()); |
|
209 if(iDigest) |
|
210 { |
|
211 ptr.Set(iDigest->Final(aMessage)); |
|
212 iDigest->Update(iOuterPad); |
|
213 iDigest->Final(ptr); |
|
214 Reset(); |
|
215 } |
|
216 return (ptr); |
|
217 } |
|
218 |
|
219 void CHMacImpl::RestoreState() |
|
220 { |
|
221 iOuterPad.Copy(iOuterPadCopy); |
|
222 iInnerPad.Copy(iInnerPadCopy); |
|
223 if (iDigest) |
|
224 { |
|
225 iDigest->RestoreState(); |
|
226 } |
|
227 } |
|
228 |
|
229 void CHMacImpl::StoreState() |
|
230 { |
|
231 iOuterPadCopy.Copy(iOuterPad); |
|
232 iInnerPadCopy.Copy(iInnerPad); |
|
233 if (iDigest) |
|
234 { |
|
235 iDigest->StoreState(); |
|
236 } |
|
237 } |
|
238 |
|
239 void CHMacImpl::SetKeyL(const CKey& aKey) |
|
240 { |
|
241 const TDesC8& keyContent=aKey.GetTDesC8L(KHmacKeyParameterUid); |
|
242 Initialise(keyContent); |
|
243 } |
|
244 |
|
245 void CHMacImpl::Close() |
|
246 { |
|
247 delete this; |
|
248 } |
|
249 |
|
250 void CHMacImpl::GetCharacteristicsL(const TCharacteristics*& aPluginCharacteristics) |
|
251 { |
|
252 iDigest->GetCharacteristicsL(aPluginCharacteristics); |
|
253 } |
|
254 |
|
255 const CExtendedCharacteristics* CHMacImpl::GetExtendedCharacteristicsL() |
|
256 { |
|
257 return iDigest->GetExtendedCharacteristicsL(); |
|
258 } |
|
259 |
|
260 // Methods which are not supported can be excluded from the coverage. |
|
261 #ifdef _BullseyeCoverage |
|
262 #pragma suppress_warnings on |
|
263 #pragma BullseyeCoverage off |
|
264 #pragma suppress_warnings off |
|
265 #endif |
|
266 |
|
267 TAny* CHMacImpl::GetExtension(TUid /*aExtensionId*/) |
|
268 { |
|
269 return NULL; |
|
270 } |
|
271 |
|
272 void CHMacImpl::SetOperationModeL(TUid /*aOperationMode*/) |
|
273 { |
|
274 User::Leave(KErrNotSupported); |
|
275 } |
|
276 |