|
1 /* |
|
2 * Copyright (c) 2002-2009 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 "rijndael.h" |
|
20 #include "rijndaelshim.h" |
|
21 #include "rijndaeltables.h" |
|
22 #include "../common/inlines.h" |
|
23 #include <cryptostrength.h> |
|
24 |
|
25 const TUint KAESKeyBytes128 = 16; |
|
26 const TUint KAESKeyBytes192 = 24; |
|
27 const TUint KAESKeyBytes256 = 32; |
|
28 const TUint KAESBlockBytes = 16; |
|
29 |
|
30 /* CRijndael */ |
|
31 EXPORT_C CRijndael::CRijndael(void) |
|
32 { |
|
33 } |
|
34 |
|
35 void CRijndael::Reset() |
|
36 { |
|
37 // CRijndael is externally derivable. Don't delete this code |
|
38 SetKey(*iKey); |
|
39 } |
|
40 |
|
41 TInt CRijndael::KeySize() const |
|
42 { |
|
43 // CRijndael is externally derivable. Don't delete this code |
|
44 return (4*(iRounds+1)); |
|
45 } |
|
46 |
|
47 EXPORT_C CRijndael::~CRijndael() |
|
48 { |
|
49 // CRijndael is externally derivable. Don't delete this code |
|
50 delete iKey; |
|
51 } |
|
52 |
|
53 void CRijndael::ConstructL(const TDesC8& aKey) |
|
54 { |
|
55 // CRijndael is externally derivable. Don't delete this code |
|
56 TUint keySize = aKey.Size(); |
|
57 assert((keySize==KAESKeyBytes128)||(keySize==KAESKeyBytes192)||(keySize==KAESKeyBytes256)); |
|
58 iKey = aKey.AllocL(); |
|
59 iRounds = keySize/4 + 6; |
|
60 SetKey(aKey); |
|
61 } |
|
62 |
|
63 void CRijndael::SetKey(const TDesC8& aKey) |
|
64 { |
|
65 // CRijndael is externally derivable. Don't delete this code |
|
66 TUint keySize = aKey.Size(); |
|
67 TUint32 temp; |
|
68 TUint32* rk = &iK[0]; |
|
69 |
|
70 TUint i = 0; |
|
71 |
|
72 GetUserKeyBigEndian(rk, keySize/4, &aKey[0], keySize); |
|
73 |
|
74 switch(keySize) |
|
75 { |
|
76 case (KAESKeyBytes128): |
|
77 { |
|
78 FOREVER |
|
79 { |
|
80 temp = rk[3]; |
|
81 rk[4] = rk[0] ^ |
|
82 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 2)] & 0xff000000) ^ |
|
83 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 1)] & 0x00ff0000) ^ |
|
84 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 0)] & 0x0000ff00) ^ |
|
85 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 3)] & 0x000000ff) ^ |
|
86 RIJNDAEL_TABLE::rcon[i]; |
|
87 rk[5] = rk[1] ^ rk[4]; |
|
88 rk[6] = rk[2] ^ rk[5]; |
|
89 rk[7] = rk[3] ^ rk[6]; |
|
90 if (++i == 10) |
|
91 break; |
|
92 rk += 4; |
|
93 } |
|
94 } |
|
95 break; |
|
96 |
|
97 case (KAESKeyBytes192): |
|
98 { |
|
99 FOREVER |
|
100 { |
|
101 temp = rk[ 5]; |
|
102 rk[ 6] = rk[ 0] ^ |
|
103 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 2)] & 0xff000000) ^ |
|
104 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 1)] & 0x00ff0000) ^ |
|
105 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 0)] & 0x0000ff00) ^ |
|
106 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 3)] & 0x000000ff) ^ |
|
107 RIJNDAEL_TABLE::rcon[i]; |
|
108 rk[ 7] = rk[ 1] ^ rk[ 6]; |
|
109 rk[ 8] = rk[ 2] ^ rk[ 7]; |
|
110 rk[ 9] = rk[ 3] ^ rk[ 8]; |
|
111 if (++i == 8) |
|
112 break; |
|
113 rk[10] = rk[ 4] ^ rk[ 9]; |
|
114 rk[11] = rk[ 5] ^ rk[10]; |
|
115 rk += 6; |
|
116 } |
|
117 } |
|
118 break; |
|
119 |
|
120 case (KAESKeyBytes256): |
|
121 { |
|
122 FOREVER |
|
123 { |
|
124 temp = rk[ 7]; |
|
125 rk[ 8] = rk[ 0] ^ |
|
126 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 2)] & 0xff000000) ^ |
|
127 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 1)] & 0x00ff0000) ^ |
|
128 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 0)] & 0x0000ff00) ^ |
|
129 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 3)] & 0x000000ff) ^ |
|
130 RIJNDAEL_TABLE::rcon[i]; |
|
131 rk[ 9] = rk[ 1] ^ rk[ 8]; |
|
132 rk[10] = rk[ 2] ^ rk[ 9]; |
|
133 rk[11] = rk[ 3] ^ rk[10]; |
|
134 if (++i == 7) |
|
135 break; |
|
136 temp = rk[11]; |
|
137 rk[12] = rk[ 4] ^ |
|
138 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 3)] & 0xff000000) ^ |
|
139 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 2)] & 0x00ff0000) ^ |
|
140 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 1)] & 0x0000ff00) ^ |
|
141 (RIJNDAEL_TABLE::Te4[GETBYTE(temp, 0)] & 0x000000ff); |
|
142 rk[13] = rk[ 5] ^ rk[12]; |
|
143 rk[14] = rk[ 6] ^ rk[13]; |
|
144 rk[15] = rk[ 7] ^ rk[14]; |
|
145 |
|
146 rk += 8; |
|
147 } |
|
148 } |
|
149 break; |
|
150 |
|
151 default: |
|
152 assert(0); // Shouldn't get here, keeps compiler happy |
|
153 } |
|
154 } |
|
155 |
|
156 |
|
157 /* CAESEncryptor */ |
|
158 EXPORT_C CAESEncryptor* CAESEncryptor::NewL(const TDesC8& aKey) |
|
159 { |
|
160 return CAESEncryptorShim::NewL(aKey); |
|
161 } |
|
162 |
|
163 EXPORT_C CAESEncryptor* CAESEncryptor::NewLC(const TDesC8& aKey) |
|
164 { |
|
165 return CAESEncryptorShim::NewLC(aKey); |
|
166 } |
|
167 |
|
168 CAESEncryptor::CAESEncryptor() |
|
169 { |
|
170 } |
|
171 |
|
172 /* CAESDecryptor */ |
|
173 EXPORT_C CAESDecryptor* CAESDecryptor::NewL(const TDesC8& aKey) |
|
174 { |
|
175 return CAESDecryptorShim::NewL(aKey); |
|
176 } |
|
177 |
|
178 EXPORT_C CAESDecryptor* CAESDecryptor::NewLC(const TDesC8& aKey) |
|
179 { |
|
180 return CAESDecryptorShim::NewLC(aKey); |
|
181 } |
|
182 |
|
183 CAESDecryptor::CAESDecryptor() |
|
184 { |
|
185 } |
|
186 |
|
187 // All these methods have been replaced by the shim |
|
188 #ifdef _BullseyeCoverage |
|
189 #pragma suppress_warnings on |
|
190 #pragma BullseyeCoverage off |
|
191 #pragma suppress_warnings off |
|
192 #endif |
|
193 |
|
194 TInt CAESDecryptor::BlockSize() const |
|
195 { |
|
196 // Method replaced by shim |
|
197 ASSERT(EFalse); |
|
198 return 0; |
|
199 } |
|
200 |
|
201 void CAESDecryptor::Transform(TDes8& /*aBlock*/) |
|
202 { |
|
203 // Method replaced by shim |
|
204 ASSERT(EFalse); |
|
205 } |
|
206 |
|
207 void CAESDecryptor::SetKey(const TDesC8& /*aKey*/) |
|
208 { |
|
209 // Method replaced by shim |
|
210 ASSERT(EFalse); |
|
211 } |
|
212 |
|
213 TInt CAESEncryptor::BlockSize() const |
|
214 { |
|
215 // Method replaced by shim |
|
216 ASSERT(EFalse); |
|
217 return KAESBlockBytes; |
|
218 } |
|
219 |
|
220 void CAESEncryptor::Transform(TDes8& /*aBlock*/) |
|
221 { |
|
222 // Method replaced by shim |
|
223 ASSERT(EFalse); |
|
224 } |
|
225 |