|
sl@0
|
1 |
/*
|
|
sl@0
|
2 |
* Copyright (c) 2006-2010 Nokia Corporation and/or its subsidiary(-ies).
|
|
sl@0
|
3 |
* All rights reserved.
|
|
sl@0
|
4 |
* This component and the accompanying materials are made available
|
|
sl@0
|
5 |
* under the terms of the License "Eclipse Public License v1.0"
|
|
sl@0
|
6 |
* which accompanies this distribution, and is available
|
|
sl@0
|
7 |
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
|
|
sl@0
|
8 |
*
|
|
sl@0
|
9 |
* Initial Contributors:
|
|
sl@0
|
10 |
* Nokia Corporation - initial contribution.
|
|
sl@0
|
11 |
*
|
|
sl@0
|
12 |
* Contributors:
|
|
sl@0
|
13 |
*
|
|
sl@0
|
14 |
* Description:
|
|
sl@0
|
15 |
*
|
|
sl@0
|
16 |
*/
|
|
sl@0
|
17 |
|
|
sl@0
|
18 |
|
|
sl@0
|
19 |
#include "rijndaelimpl.h"
|
|
sl@0
|
20 |
#include <cryptospi/keys.h>
|
|
sl@0
|
21 |
|
|
sl@0
|
22 |
#include "rijndaeltables.h"
|
|
sl@0
|
23 |
#include "../../../source/common/inlines.h"
|
|
sl@0
|
24 |
#include "pluginconfig.h"
|
|
sl@0
|
25 |
#include "symmetriccipherimpl.h"
|
|
sl@0
|
26 |
#include <cryptostrength.h>
|
|
sl@0
|
27 |
|
|
sl@0
|
28 |
using namespace SoftwareCrypto;
|
|
sl@0
|
29 |
|
|
sl@0
|
30 |
const TUint KAESKeyBytes128 = 16;
|
|
sl@0
|
31 |
const TUint KAESKeyBytes192 = 24;
|
|
sl@0
|
32 |
const TUint KAESKeyBytes256 = 32;
|
|
sl@0
|
33 |
const TUint KAESBlockBytes = 16;
|
|
sl@0
|
34 |
|
|
sl@0
|
35 |
/* CRijndaelmpl*/
|
|
sl@0
|
36 |
CRijndaelImpl::CRijndaelImpl(
|
|
sl@0
|
37 |
TUid aCryptoMode,
|
|
sl@0
|
38 |
TUid aOperationMode,
|
|
sl@0
|
39 |
TUid aPadding,
|
|
sl@0
|
40 |
TUid aImplementationUid) :
|
|
sl@0
|
41 |
CSymmetricBlockCipherImpl(KAESBlockBytes, aCryptoMode, aOperationMode, aPadding),
|
|
sl@0
|
42 |
iImplementationUid(aImplementationUid)
|
|
sl@0
|
43 |
{
|
|
sl@0
|
44 |
}
|
|
sl@0
|
45 |
|
|
sl@0
|
46 |
CRijndaelImpl* CRijndaelImpl::NewL(const CKey& aKey, TUid aCryptoMode, TUid aOperationMode,
|
|
sl@0
|
47 |
TUid aPadding, TUid aImplementationUid)
|
|
sl@0
|
48 |
{
|
|
sl@0
|
49 |
CRijndaelImpl* self = CRijndaelImpl::NewLC(aKey, aCryptoMode, aOperationMode,
|
|
sl@0
|
50 |
aPadding, aImplementationUid);
|
|
sl@0
|
51 |
CleanupStack::Pop(self);
|
|
sl@0
|
52 |
return self;
|
|
sl@0
|
53 |
}
|
|
sl@0
|
54 |
|
|
sl@0
|
55 |
CRijndaelImpl* CRijndaelImpl::NewLC(const CKey& aKey, TUid aCryptoMode, TUid aOperationMode,
|
|
sl@0
|
56 |
TUid aPadding, TUid aImplementationUid)
|
|
sl@0
|
57 |
{
|
|
sl@0
|
58 |
CRijndaelImpl* self = new(ELeave) CRijndaelImpl(aCryptoMode, aOperationMode, aPadding,
|
|
sl@0
|
59 |
aImplementationUid);
|
|
sl@0
|
60 |
CleanupStack::PushL(self);
|
|
sl@0
|
61 |
self->ConstructL(aKey);
|
|
sl@0
|
62 |
|
|
sl@0
|
63 |
const TDesC8& keyContent = aKey.GetTDesC8L(KSymmetricKeyParameterUid);
|
|
sl@0
|
64 |
TCrypto::IsSymmetricWeakEnoughL(BytesToBits(keyContent.Size()) - keyContent.Size());
|
|
sl@0
|
65 |
return self;
|
|
sl@0
|
66 |
}
|
|
sl@0
|
67 |
|
|
sl@0
|
68 |
CRijndaelImpl::~CRijndaelImpl()
|
|
sl@0
|
69 |
{
|
|
sl@0
|
70 |
// make sure key information isn't visible to other processes if the
|
|
sl@0
|
71 |
// page is reused.
|
|
sl@0
|
72 |
Mem::FillZ(&iK, sizeof(iK));
|
|
sl@0
|
73 |
}
|
|
sl@0
|
74 |
|
|
sl@0
|
75 |
void CRijndaelImpl::ConstructL(const CKey& aKey)
|
|
sl@0
|
76 |
{
|
|
sl@0
|
77 |
CSymmetricBlockCipherImpl::ConstructL(aKey);
|
|
sl@0
|
78 |
SetKeySchedule();
|
|
sl@0
|
79 |
}
|
|
sl@0
|
80 |
|
|
sl@0
|
81 |
CExtendedCharacteristics* CRijndaelImpl::CreateExtendedCharacteristicsL()
|
|
sl@0
|
82 |
{
|
|
sl@0
|
83 |
// All Symbian software plug-ins have unlimited concurrency, cannot be reserved
|
|
sl@0
|
84 |
// for exclusive use and are not CERTIFIED to be standards compliant.
|
|
sl@0
|
85 |
return CExtendedCharacteristics::NewL(KMaxTInt, EFalse);
|
|
sl@0
|
86 |
}
|
|
sl@0
|
87 |
|
|
sl@0
|
88 |
const CExtendedCharacteristics* CRijndaelImpl::GetExtendedCharacteristicsL()
|
|
sl@0
|
89 |
{
|
|
sl@0
|
90 |
return CRijndaelImpl::CreateExtendedCharacteristicsL();
|
|
sl@0
|
91 |
}
|
|
sl@0
|
92 |
|
|
sl@0
|
93 |
TUid CRijndaelImpl::ImplementationUid() const
|
|
sl@0
|
94 |
{
|
|
sl@0
|
95 |
return iImplementationUid;
|
|
sl@0
|
96 |
}
|
|
sl@0
|
97 |
|
|
sl@0
|
98 |
TBool CRijndaelImpl::IsValidKeyLength(TInt aKeyBytes) const
|
|
sl@0
|
99 |
{
|
|
sl@0
|
100 |
switch(aKeyBytes)
|
|
sl@0
|
101 |
{
|
|
sl@0
|
102 |
case KAESKeyBytes128:
|
|
sl@0
|
103 |
case KAESKeyBytes192:
|
|
sl@0
|
104 |
case KAESKeyBytes256:
|
|
sl@0
|
105 |
return ETrue;
|
|
sl@0
|
106 |
default:
|
|
sl@0
|
107 |
return EFalse;
|
|
sl@0
|
108 |
}
|
|
sl@0
|
109 |
}
|
|
sl@0
|
110 |
|
|
sl@0
|
111 |
void CRijndaelImpl::SetKeySchedule()
|
|
sl@0
|
112 |
{
|
|
sl@0
|
113 |
iRounds = iKeyBytes/4 + 6;
|
|
sl@0
|
114 |
if (iCryptoMode.iUid == KCryptoModeEncrypt)
|
|
sl@0
|
115 |
{
|
|
sl@0
|
116 |
SetEncryptKeySchedule(*iKey, &iK[0]);
|
|
sl@0
|
117 |
}
|
|
sl@0
|
118 |
else
|
|
sl@0
|
119 |
{
|
|
sl@0
|
120 |
ASSERT(iCryptoMode.iUid == KCryptoModeDecrypt);
|
|
sl@0
|
121 |
SetDecryptKeySchedule(*iKey, &iK[0]);
|
|
sl@0
|
122 |
}
|
|
sl@0
|
123 |
}
|
|
sl@0
|
124 |
|
|
sl@0
|
125 |
void CRijndaelImpl::TransformEncrypt(
|
|
sl@0
|
126 |
TUint8* aBuffer,
|
|
sl@0
|
127 |
TUint aNumBlocks)
|
|
sl@0
|
128 |
{
|
|
sl@0
|
129 |
for (TInt i = 0; i < aNumBlocks; ++i)
|
|
sl@0
|
130 |
{
|
|
sl@0
|
131 |
ModeEncryptStart(aBuffer);
|
|
sl@0
|
132 |
|
|
sl@0
|
133 |
TUint32 s0, s1, s2, s3, t0, t1, t2, t3;
|
|
sl@0
|
134 |
const TUint32* rk = &iK[0];
|
|
sl@0
|
135 |
|
|
sl@0
|
136 |
/*
|
|
sl@0
|
137 |
* map byte array block to cipher state
|
|
sl@0
|
138 |
* and add initial round key:
|
|
sl@0
|
139 |
*/
|
|
sl@0
|
140 |
GetBlockBigEndian(aBuffer, s0, s1, s2, s3);
|
|
sl@0
|
141 |
s0 ^= rk[0];
|
|
sl@0
|
142 |
s1 ^= rk[1];
|
|
sl@0
|
143 |
s2 ^= rk[2];
|
|
sl@0
|
144 |
s3 ^= rk[3];
|
|
sl@0
|
145 |
/*
|
|
sl@0
|
146 |
* Nr - 1 full rounds:
|
|
sl@0
|
147 |
*/
|
|
sl@0
|
148 |
TUint r = iRounds >> 1;
|
|
sl@0
|
149 |
FOREVER
|
|
sl@0
|
150 |
{
|
|
sl@0
|
151 |
t0 =
|
|
sl@0
|
152 |
RIJNDAEL_TABLE::Te0[GETBYTE(s0, 3)] ^
|
|
sl@0
|
153 |
RIJNDAEL_TABLE::Te1[GETBYTE(s1, 2)] ^
|
|
sl@0
|
154 |
RIJNDAEL_TABLE::Te2[GETBYTE(s2, 1)] ^
|
|
sl@0
|
155 |
RIJNDAEL_TABLE::Te3[GETBYTE(s3, 0)] ^
|
|
sl@0
|
156 |
rk[4];
|
|
sl@0
|
157 |
t1 =
|
|
sl@0
|
158 |
RIJNDAEL_TABLE::Te0[GETBYTE(s1, 3)] ^
|
|
sl@0
|
159 |
RIJNDAEL_TABLE::Te1[GETBYTE(s2, 2)] ^
|
|
sl@0
|
160 |
RIJNDAEL_TABLE::Te2[GETBYTE(s3, 1)] ^
|
|
sl@0
|
161 |
RIJNDAEL_TABLE::Te3[GETBYTE(s0, 0)] ^
|
|
sl@0
|
162 |
rk[5];
|
|
sl@0
|
163 |
t2 =
|
|
sl@0
|
164 |
RIJNDAEL_TABLE::Te0[GETBYTE(s2, 3)] ^
|
|
sl@0
|
165 |
RIJNDAEL_TABLE::Te1[GETBYTE(s3, 2)] ^
|
|
sl@0
|
166 |
RIJNDAEL_TABLE::Te2[GETBYTE(s0, 1)] ^
|
|
sl@0
|
167 |
RIJNDAEL_TABLE::Te3[GETBYTE(s1, 0)] ^
|
|
sl@0
|
168 |
rk[6];
|
|
sl@0
|
169 |
t3 =
|
|
sl@0
|
170 |
RIJNDAEL_TABLE::Te0[GETBYTE(s3, 3)] ^
|
|
sl@0
|
171 |
RIJNDAEL_TABLE::Te1[GETBYTE(s0, 2)] ^
|
|
sl@0
|
172 |
RIJNDAEL_TABLE::Te2[GETBYTE(s1, 1)] ^
|
|
sl@0
|
173 |
RIJNDAEL_TABLE::Te3[GETBYTE(s2, 0)] ^
|
|
sl@0
|
174 |
rk[7];
|
|
sl@0
|
175 |
|
|
sl@0
|
176 |
rk += 8;
|
|
sl@0
|
177 |
if (--r == 0)
|
|
sl@0
|
178 |
break;
|
|
sl@0
|
179 |
|
|
sl@0
|
180 |
s0 =
|
|
sl@0
|
181 |
RIJNDAEL_TABLE::Te0[GETBYTE(t0, 3)] ^
|
|
sl@0
|
182 |
RIJNDAEL_TABLE::Te1[GETBYTE(t1, 2)] ^
|
|
sl@0
|
183 |
RIJNDAEL_TABLE::Te2[GETBYTE(t2, 1)] ^
|
|
sl@0
|
184 |
RIJNDAEL_TABLE::Te3[GETBYTE(t3, 0)] ^
|
|
sl@0
|
185 |
rk[0];
|
|
sl@0
|
186 |
s1 =
|
|
sl@0
|
187 |
RIJNDAEL_TABLE::Te0[GETBYTE(t1, 3)] ^
|
|
sl@0
|
188 |
RIJNDAEL_TABLE::Te1[GETBYTE(t2, 2)] ^
|
|
sl@0
|
189 |
RIJNDAEL_TABLE::Te2[GETBYTE(t3, 1)] ^
|
|
sl@0
|
190 |
RIJNDAEL_TABLE::Te3[GETBYTE(t0, 0)] ^
|
|
sl@0
|
191 |
rk[1];
|
|
sl@0
|
192 |
s2 =
|
|
sl@0
|
193 |
RIJNDAEL_TABLE::Te0[GETBYTE(t2, 3)] ^
|
|
sl@0
|
194 |
RIJNDAEL_TABLE::Te1[GETBYTE(t3, 2)] ^
|
|
sl@0
|
195 |
RIJNDAEL_TABLE::Te2[GETBYTE(t0, 1)] ^
|
|
sl@0
|
196 |
RIJNDAEL_TABLE::Te3[GETBYTE(t1, 0)] ^
|
|
sl@0
|
197 |
rk[2];
|
|
sl@0
|
198 |
s3 =
|
|
sl@0
|
199 |
RIJNDAEL_TABLE::Te0[GETBYTE(t3, 3)] ^
|
|
sl@0
|
200 |
RIJNDAEL_TABLE::Te1[GETBYTE(t0, 2)] ^
|
|
sl@0
|
201 |
RIJNDAEL_TABLE::Te2[GETBYTE(t1, 1)] ^
|
|
sl@0
|
202 |
RIJNDAEL_TABLE::Te3[GETBYTE(t2, 0)] ^
|
|
sl@0
|
203 |
rk[3];
|
|
sl@0
|
204 |
}
|
|
sl@0
|
205 |
/*
|
|
sl@0
|
206 |
* apply last round and
|
|
sl@0
|
207 |
* map cipher state to byte array block:
|
|
sl@0
|
208 |
*/
|
|
sl@0
|
209 |
|
|
sl@0
|
210 |
s0 =
|
|
sl@0
|
211 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t0, 3)] & 0xff000000) ^
|
|
sl@0
|
212 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t1, 2)] & 0x00ff0000) ^
|
|
sl@0
|
213 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t2, 1)] & 0x0000ff00) ^
|
|
sl@0
|
214 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t3, 0)] & 0x000000ff) ^
|
|
sl@0
|
215 |
rk[0];
|
|
sl@0
|
216 |
s1 =
|
|
sl@0
|
217 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t1, 3)] & 0xff000000) ^
|
|
sl@0
|
218 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t2, 2)] & 0x00ff0000) ^
|
|
sl@0
|
219 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t3, 1)] & 0x0000ff00) ^
|
|
sl@0
|
220 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t0, 0)] & 0x000000ff) ^
|
|
sl@0
|
221 |
rk[1];
|
|
sl@0
|
222 |
s2 =
|
|
sl@0
|
223 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t2, 3)] & 0xff000000) ^
|
|
sl@0
|
224 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t3, 2)] & 0x00ff0000) ^
|
|
sl@0
|
225 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t0, 1)] & 0x0000ff00) ^
|
|
sl@0
|
226 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t1, 0)] & 0x000000ff) ^
|
|
sl@0
|
227 |
rk[2];
|
|
sl@0
|
228 |
s3 =
|
|
sl@0
|
229 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t3, 3)] & 0xff000000) ^
|
|
sl@0
|
230 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t0, 2)] & 0x00ff0000) ^
|
|
sl@0
|
231 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t1, 1)] & 0x0000ff00) ^
|
|
sl@0
|
232 |
(RIJNDAEL_TABLE::Te4[GETBYTE(t2, 0)] & 0x000000ff) ^
|
|
sl@0
|
233 |
rk[3];
|
|
sl@0
|
234 |
|
|
sl@0
|
235 |
PutBlockBigEndian(aBuffer, s0, s1, s2, s3);
|
|
sl@0
|
236 |
ModeEncryptEnd(aBuffer);
|
|
sl@0
|
237 |
aBuffer += KAESBlockBytes;
|
|
sl@0
|
238 |
}
|
|
sl@0
|
239 |
}
|
|
sl@0
|
240 |
|
|
sl@0
|
241 |
void CRijndaelImpl::TransformDecrypt(
|
|
sl@0
|
242 |
TUint8* aBuffer,
|
|
sl@0
|
243 |
TUint aNumBlocks)
|
|
sl@0
|
244 |
{
|
|
sl@0
|
245 |
for (TInt i = 0; i < aNumBlocks; ++i)
|
|
sl@0
|
246 |
{
|
|
sl@0
|
247 |
ModeDecryptStart(aBuffer);
|
|
sl@0
|
248 |
|
|
sl@0
|
249 |
TUint32 s0, s1, s2, s3, t0, t1, t2, t3;
|
|
sl@0
|
250 |
const TUint32* rk = &iK[0];
|
|
sl@0
|
251 |
|
|
sl@0
|
252 |
/*
|
|
sl@0
|
253 |
* map byte array block to cipher state
|
|
sl@0
|
254 |
* and add initial round key:
|
|
sl@0
|
255 |
*/
|
|
sl@0
|
256 |
GetBlockBigEndian(aBuffer, s0, s1, s2, s3);
|
|
sl@0
|
257 |
|
|
sl@0
|
258 |
s0 ^= rk[0];
|
|
sl@0
|
259 |
s1 ^= rk[1];
|
|
sl@0
|
260 |
s2 ^= rk[2];
|
|
sl@0
|
261 |
s3 ^= rk[3];
|
|
sl@0
|
262 |
/*
|
|
sl@0
|
263 |
* Nr - 1 full rounds:
|
|
sl@0
|
264 |
*/
|
|
sl@0
|
265 |
TUint r = iRounds >> 1;
|
|
sl@0
|
266 |
FOREVER
|
|
sl@0
|
267 |
{
|
|
sl@0
|
268 |
t0 =
|
|
sl@0
|
269 |
RIJNDAEL_TABLE::Td0[GETBYTE(s0, 3)] ^
|
|
sl@0
|
270 |
RIJNDAEL_TABLE::Td1[GETBYTE(s3, 2)] ^
|
|
sl@0
|
271 |
RIJNDAEL_TABLE::Td2[GETBYTE(s2, 1)] ^
|
|
sl@0
|
272 |
RIJNDAEL_TABLE::Td3[GETBYTE(s1, 0)] ^
|
|
sl@0
|
273 |
rk[4];
|
|
sl@0
|
274 |
t1 =
|
|
sl@0
|
275 |
RIJNDAEL_TABLE::Td0[GETBYTE(s1, 3)] ^
|
|
sl@0
|
276 |
RIJNDAEL_TABLE::Td1[GETBYTE(s0, 2)] ^
|
|
sl@0
|
277 |
RIJNDAEL_TABLE::Td2[GETBYTE(s3, 1)] ^
|
|
sl@0
|
278 |
RIJNDAEL_TABLE::Td3[GETBYTE(s2, 0)] ^
|
|
sl@0
|
279 |
rk[5];
|
|
sl@0
|
280 |
t2 =
|
|
sl@0
|
281 |
RIJNDAEL_TABLE::Td0[GETBYTE(s2, 3)] ^
|
|
sl@0
|
282 |
RIJNDAEL_TABLE::Td1[GETBYTE(s1, 2)] ^
|
|
sl@0
|
283 |
RIJNDAEL_TABLE::Td2[GETBYTE(s0, 1)] ^
|
|
sl@0
|
284 |
RIJNDAEL_TABLE::Td3[GETBYTE(s3, 0)] ^
|
|
sl@0
|
285 |
rk[6];
|
|
sl@0
|
286 |
t3 =
|
|
sl@0
|
287 |
RIJNDAEL_TABLE::Td0[GETBYTE(s3, 3)] ^
|
|
sl@0
|
288 |
RIJNDAEL_TABLE::Td1[GETBYTE(s2, 2)] ^
|
|
sl@0
|
289 |
RIJNDAEL_TABLE::Td2[GETBYTE(s1, 1)] ^
|
|
sl@0
|
290 |
RIJNDAEL_TABLE::Td3[GETBYTE(s0, 0)] ^
|
|
sl@0
|
291 |
rk[7];
|
|
sl@0
|
292 |
|
|
sl@0
|
293 |
rk += 8;
|
|
sl@0
|
294 |
if (--r == 0)
|
|
sl@0
|
295 |
break;
|
|
sl@0
|
296 |
|
|
sl@0
|
297 |
s0 =
|
|
sl@0
|
298 |
RIJNDAEL_TABLE::Td0[GETBYTE(t0, 3)] ^
|
|
sl@0
|
299 |
RIJNDAEL_TABLE::Td1[GETBYTE(t3, 2)] ^
|
|
sl@0
|
300 |
RIJNDAEL_TABLE::Td2[GETBYTE(t2, 1)] ^
|
|
sl@0
|
301 |
RIJNDAEL_TABLE::Td3[GETBYTE(t1, 0)] ^
|
|
sl@0
|
302 |
rk[0];
|
|
sl@0
|
303 |
s1 =
|
|
sl@0
|
304 |
RIJNDAEL_TABLE::Td0[GETBYTE(t1, 3)] ^
|
|
sl@0
|
305 |
RIJNDAEL_TABLE::Td1[GETBYTE(t0, 2)] ^
|
|
sl@0
|
306 |
RIJNDAEL_TABLE::Td2[GETBYTE(t3, 1)] ^
|
|
sl@0
|
307 |
RIJNDAEL_TABLE::Td3[GETBYTE(t2, 0)] ^
|
|
sl@0
|
308 |
rk[1];
|
|
sl@0
|
309 |
s2 =
|
|
sl@0
|
310 |
RIJNDAEL_TABLE::Td0[GETBYTE(t2, 3)] ^
|
|
sl@0
|
311 |
RIJNDAEL_TABLE::Td1[GETBYTE(t1, 2)] ^
|
|
sl@0
|
312 |
RIJNDAEL_TABLE::Td2[GETBYTE(t0, 1)] ^
|
|
sl@0
|
313 |
RIJNDAEL_TABLE::Td3[GETBYTE(t3, 0)] ^
|
|
sl@0
|
314 |
rk[2];
|
|
sl@0
|
315 |
s3 =
|
|
sl@0
|
316 |
RIJNDAEL_TABLE::Td0[GETBYTE(t3, 3)] ^
|
|
sl@0
|
317 |
RIJNDAEL_TABLE::Td1[GETBYTE(t2, 2)] ^
|
|
sl@0
|
318 |
RIJNDAEL_TABLE::Td2[GETBYTE(t1, 1)] ^
|
|
sl@0
|
319 |
RIJNDAEL_TABLE::Td3[GETBYTE(t0, 0)] ^
|
|
sl@0
|
320 |
rk[3];
|
|
sl@0
|
321 |
}
|
|
sl@0
|
322 |
/*
|
|
sl@0
|
323 |
* apply last round and
|
|
sl@0
|
324 |
* map cipher state to byte array block:
|
|
sl@0
|
325 |
*/
|
|
sl@0
|
326 |
s0 =
|
|
sl@0
|
327 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t0, 3)] & 0xff000000) ^
|
|
sl@0
|
328 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t3, 2)] & 0x00ff0000) ^
|
|
sl@0
|
329 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t2, 1)] & 0x0000ff00) ^
|
|
sl@0
|
330 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t1, 0)] & 0x000000ff) ^
|
|
sl@0
|
331 |
rk[0];
|
|
sl@0
|
332 |
s1 =
|
|
sl@0
|
333 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t1, 3)] & 0xff000000) ^
|
|
sl@0
|
334 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t0, 2)] & 0x00ff0000) ^
|
|
sl@0
|
335 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t3, 1)] & 0x0000ff00) ^
|
|
sl@0
|
336 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t2, 0)] & 0x000000ff) ^
|
|
sl@0
|
337 |
rk[1];
|
|
sl@0
|
338 |
s2 =
|
|
sl@0
|
339 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t2, 3)] & 0xff000000) ^
|
|
sl@0
|
340 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t1, 2)] & 0x00ff0000) ^
|
|
sl@0
|
341 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t0, 1)] & 0x0000ff00) ^
|
|
sl@0
|
342 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t3, 0)] & 0x000000ff) ^
|
|
sl@0
|
343 |
rk[2];
|
|
sl@0
|
344 |
s3 =
|
|
sl@0
|
345 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t3, 3)] & 0xff000000) ^
|
|
sl@0
|
346 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t2, 2)] & 0x00ff0000) ^
|
|
sl@0
|
347 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t1, 1)] & 0x0000ff00) ^
|
|
sl@0
|
348 |
(RIJNDAEL_TABLE::Td4[GETBYTE(t0, 0)] & 0x000000ff) ^
|
|
sl@0
|
349 |
rk[3];
|
|
sl@0
|
350 |
PutBlockBigEndian(aBuffer, s0, s1, s2, s3);
|
|
sl@0
|
351 |
ModeDecryptEnd(aBuffer);
|
|
sl@0
|
352 |
aBuffer += KAESBlockBytes;
|
|
sl@0
|
353 |
}
|
|
sl@0
|
354 |
}
|
|
sl@0
|
355 |
|
|
sl@0
|
356 |
void CRijndaelImpl::SetEncryptKeySchedule(const TDesC8& aKey, TUint32* aKeySchedule)
|
|
sl@0
|
357 |
{
|
|
sl@0
|
358 |
TUint keySize = aKey.Length();
|
|
sl@0
|
359 |
TUint32 temp;
|
|
sl@0
|
360 |
TUint32* rk = aKeySchedule;
|
|
sl@0
|
361 |
|
|
sl@0
|
362 |
TUint i = 0;
|
|
sl@0
|
363 |
|
|
sl@0
|
364 |
GetUserKeyBigEndian(rk, keySize/4, &aKey[0], keySize);
|
|
sl@0
|
365 |
|
|
sl@0
|
366 |
switch(keySize)
|
|
sl@0
|
367 |
{
|
|
sl@0
|
368 |
case (KAESKeyBytes128):
|
|
sl@0
|
369 |
{
|
|
sl@0
|
370 |
FOREVER
|
|
sl@0
|
371 |
{
|
|
sl@0
|
372 |
temp = rk[3];
|
|
sl@0
|
373 |
rk[4] = rk[0] ^
|
|
sl@0
|
374 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 2)] & 0xff000000) ^
|
|
sl@0
|
375 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 1)] & 0x00ff0000) ^
|
|
sl@0
|
376 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 0)] & 0x0000ff00) ^
|
|
sl@0
|
377 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 3)] & 0x000000ff) ^
|
|
sl@0
|
378 |
RIJNDAEL_TABLE::rcon[i];
|
|
sl@0
|
379 |
rk[5] = rk[1] ^ rk[4];
|
|
sl@0
|
380 |
rk[6] = rk[2] ^ rk[5];
|
|
sl@0
|
381 |
rk[7] = rk[3] ^ rk[6];
|
|
sl@0
|
382 |
if (++i == 10)
|
|
sl@0
|
383 |
break;
|
|
sl@0
|
384 |
rk += 4;
|
|
sl@0
|
385 |
}
|
|
sl@0
|
386 |
}
|
|
sl@0
|
387 |
break;
|
|
sl@0
|
388 |
|
|
sl@0
|
389 |
case (KAESKeyBytes192):
|
|
sl@0
|
390 |
{
|
|
sl@0
|
391 |
FOREVER
|
|
sl@0
|
392 |
{
|
|
sl@0
|
393 |
temp = rk[ 5];
|
|
sl@0
|
394 |
rk[ 6] = rk[ 0] ^
|
|
sl@0
|
395 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 2)] & 0xff000000) ^
|
|
sl@0
|
396 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 1)] & 0x00ff0000) ^
|
|
sl@0
|
397 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 0)] & 0x0000ff00) ^
|
|
sl@0
|
398 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 3)] & 0x000000ff) ^
|
|
sl@0
|
399 |
RIJNDAEL_TABLE::rcon[i];
|
|
sl@0
|
400 |
rk[ 7] = rk[ 1] ^ rk[ 6];
|
|
sl@0
|
401 |
rk[ 8] = rk[ 2] ^ rk[ 7];
|
|
sl@0
|
402 |
rk[ 9] = rk[ 3] ^ rk[ 8];
|
|
sl@0
|
403 |
if (++i == 8)
|
|
sl@0
|
404 |
break;
|
|
sl@0
|
405 |
rk[10] = rk[ 4] ^ rk[ 9];
|
|
sl@0
|
406 |
rk[11] = rk[ 5] ^ rk[10];
|
|
sl@0
|
407 |
rk += 6;
|
|
sl@0
|
408 |
}
|
|
sl@0
|
409 |
}
|
|
sl@0
|
410 |
break;
|
|
sl@0
|
411 |
|
|
sl@0
|
412 |
case (KAESKeyBytes256):
|
|
sl@0
|
413 |
{
|
|
sl@0
|
414 |
FOREVER
|
|
sl@0
|
415 |
{
|
|
sl@0
|
416 |
temp = rk[ 7];
|
|
sl@0
|
417 |
rk[ 8] = rk[ 0] ^
|
|
sl@0
|
418 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 2)] & 0xff000000) ^
|
|
sl@0
|
419 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 1)] & 0x00ff0000) ^
|
|
sl@0
|
420 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 0)] & 0x0000ff00) ^
|
|
sl@0
|
421 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 3)] & 0x000000ff) ^
|
|
sl@0
|
422 |
RIJNDAEL_TABLE::rcon[i];
|
|
sl@0
|
423 |
rk[ 9] = rk[ 1] ^ rk[ 8];
|
|
sl@0
|
424 |
rk[10] = rk[ 2] ^ rk[ 9];
|
|
sl@0
|
425 |
rk[11] = rk[ 3] ^ rk[10];
|
|
sl@0
|
426 |
if (++i == 7)
|
|
sl@0
|
427 |
break;
|
|
sl@0
|
428 |
temp = rk[11];
|
|
sl@0
|
429 |
rk[12] = rk[ 4] ^
|
|
sl@0
|
430 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 3)] & 0xff000000) ^
|
|
sl@0
|
431 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 2)] & 0x00ff0000) ^
|
|
sl@0
|
432 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 1)] & 0x0000ff00) ^
|
|
sl@0
|
433 |
(RIJNDAEL_TABLE::Te4[GETBYTE(temp, 0)] & 0x000000ff);
|
|
sl@0
|
434 |
rk[13] = rk[ 5] ^ rk[12];
|
|
sl@0
|
435 |
rk[14] = rk[ 6] ^ rk[13];
|
|
sl@0
|
436 |
rk[15] = rk[ 7] ^ rk[14];
|
|
sl@0
|
437 |
|
|
sl@0
|
438 |
rk += 8;
|
|
sl@0
|
439 |
}
|
|
sl@0
|
440 |
}
|
|
sl@0
|
441 |
break;
|
|
sl@0
|
442 |
|
|
sl@0
|
443 |
default:
|
|
sl@0
|
444 |
assert(0); // Shouldn't get here, keeps compiler happy
|
|
sl@0
|
445 |
}
|
|
sl@0
|
446 |
}
|
|
sl@0
|
447 |
|
|
sl@0
|
448 |
void CRijndaelImpl::SetDecryptKeySchedule(const TDesC8& aKey, TUint32* aKeySchedule)
|
|
sl@0
|
449 |
{
|
|
sl@0
|
450 |
SetEncryptKeySchedule(aKey, aKeySchedule);
|
|
sl@0
|
451 |
|
|
sl@0
|
452 |
TUint i, j;
|
|
sl@0
|
453 |
TUint32* rk = aKeySchedule;
|
|
sl@0
|
454 |
TUint32 temp;
|
|
sl@0
|
455 |
|
|
sl@0
|
456 |
// invert the order of the round keys
|
|
sl@0
|
457 |
for (i = 0, j = 4*iRounds; i < j; i += 4, j -= 4)
|
|
sl@0
|
458 |
{
|
|
sl@0
|
459 |
temp = rk[i ]; rk[i ] = rk[j ]; rk[j ] = temp;
|
|
sl@0
|
460 |
temp = rk[i + 1]; rk[i + 1] = rk[j + 1]; rk[j + 1] = temp;
|
|
sl@0
|
461 |
temp = rk[i + 2]; rk[i + 2] = rk[j + 2]; rk[j + 2] = temp;
|
|
sl@0
|
462 |
temp = rk[i + 3]; rk[i + 3] = rk[j + 3]; rk[j + 3] = temp;
|
|
sl@0
|
463 |
}
|
|
sl@0
|
464 |
|
|
sl@0
|
465 |
// apply the inverse MixColumn transform to all round keys but the first and the last
|
|
sl@0
|
466 |
for (i = 1; i < iRounds; i++)
|
|
sl@0
|
467 |
{
|
|
sl@0
|
468 |
rk += 4;
|
|
sl@0
|
469 |
rk[0] =
|
|
sl@0
|
470 |
RIJNDAEL_TABLE::Td0[RIJNDAEL_TABLE::Te4[GETBYTE(rk[0], 3)] & 0xff] ^
|
|
sl@0
|
471 |
RIJNDAEL_TABLE::Td1[RIJNDAEL_TABLE::Te4[GETBYTE(rk[0], 2)] & 0xff] ^
|
|
sl@0
|
472 |
RIJNDAEL_TABLE::Td2[RIJNDAEL_TABLE::Te4[GETBYTE(rk[0], 1)] & 0xff] ^
|
|
sl@0
|
473 |
RIJNDAEL_TABLE::Td3[RIJNDAEL_TABLE::Te4[GETBYTE(rk[0], 0)] & 0xff];
|
|
sl@0
|
474 |
rk[1] =
|
|
sl@0
|
475 |
RIJNDAEL_TABLE::Td0[RIJNDAEL_TABLE::Te4[GETBYTE(rk[1], 3)] & 0xff] ^
|
|
sl@0
|
476 |
RIJNDAEL_TABLE::Td1[RIJNDAEL_TABLE::Te4[GETBYTE(rk[1], 2)] & 0xff] ^
|
|
sl@0
|
477 |
RIJNDAEL_TABLE::Td2[RIJNDAEL_TABLE::Te4[GETBYTE(rk[1], 1)] & 0xff] ^
|
|
sl@0
|
478 |
RIJNDAEL_TABLE::Td3[RIJNDAEL_TABLE::Te4[GETBYTE(rk[1], 0)] & 0xff];
|
|
sl@0
|
479 |
rk[2] =
|
|
sl@0
|
480 |
RIJNDAEL_TABLE::Td0[RIJNDAEL_TABLE::Te4[GETBYTE(rk[2], 3)] & 0xff] ^
|
|
sl@0
|
481 |
RIJNDAEL_TABLE::Td1[RIJNDAEL_TABLE::Te4[GETBYTE(rk[2], 2)] & 0xff] ^
|
|
sl@0
|
482 |
RIJNDAEL_TABLE::Td2[RIJNDAEL_TABLE::Te4[GETBYTE(rk[2], 1)] & 0xff] ^
|
|
sl@0
|
483 |
RIJNDAEL_TABLE::Td3[RIJNDAEL_TABLE::Te4[GETBYTE(rk[2], 0)] & 0xff];
|
|
sl@0
|
484 |
rk[3] =
|
|
sl@0
|
485 |
RIJNDAEL_TABLE::Td0[RIJNDAEL_TABLE::Te4[GETBYTE(rk[3], 3)] & 0xff] ^
|
|
sl@0
|
486 |
RIJNDAEL_TABLE::Td1[RIJNDAEL_TABLE::Te4[GETBYTE(rk[3], 2)] & 0xff] ^
|
|
sl@0
|
487 |
RIJNDAEL_TABLE::Td2[RIJNDAEL_TABLE::Te4[GETBYTE(rk[3], 1)] & 0xff] ^
|
|
sl@0
|
488 |
RIJNDAEL_TABLE::Td3[RIJNDAEL_TABLE::Te4[GETBYTE(rk[3], 0)] & 0xff];
|
|
sl@0
|
489 |
}
|
|
sl@0
|
490 |
}
|