|
1 /* |
|
2 * Copyright (c) 2005 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 "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: Class for AES (in Counter Mode) encryption operations |
|
15 * |
|
16 */ |
|
17 |
|
18 |
|
19 |
|
20 |
|
21 #ifndef __SRTPAESCTRCRYPTO_H__ |
|
22 #define __SRTPAESCTRCRYPTO_H__ |
|
23 |
|
24 #include <e32base.h> |
|
25 |
|
26 |
|
27 class CSrtpAESCTRCrypto : public CBase |
|
28 { |
|
29 public: |
|
30 /** |
|
31 * Constructor. |
|
32 * @leave KErrNone if success, system-wide error code otherwise |
|
33 */ |
|
34 IMPORT_C static CSrtpAESCTRCrypto* NewL(); |
|
35 |
|
36 /** |
|
37 * AES CM cipher, produces generic keystream |
|
38 * @param aBitLength key length. |
|
39 * @param aKey Input key. |
|
40 * @param aIV Integer Value (IV). |
|
41 * Returns HBufC8* generated keystream |
|
42 */ |
|
43 IMPORT_C HBufC8* KeystreamL(TUint aBitLength, const TDesC8& aKey, const TDesC8& aIV ); |
|
44 |
|
45 /** |
|
46 * AES CM cipher, produces key stream and performs an XOR operation for the text |
|
47 * @param aKey Input key. |
|
48 * @param aIV Integer Value (IV). |
|
49 * @param aSrc source data which will be encrypted. |
|
50 * Returns HBufC8* decrypted/encrypted source |
|
51 */ |
|
52 IMPORT_C HBufC8* EncryptL(const TDesC8& aKey, const TDesC8& aIV, const TDesC8& aSrc); |
|
53 |
|
54 /** |
|
55 * Destructor |
|
56 */ |
|
57 ~CSrtpAESCTRCrypto(); |
|
58 private: |
|
59 /** |
|
60 * Default constructor. |
|
61 */ |
|
62 CSrtpAESCTRCrypto( ); |
|
63 |
|
64 /** |
|
65 * Increases IV's value by one. |
|
66 * Sets IV's last 32 bits to 0 if their value is max |
|
67 * @param aIV Integer Value (IV). |
|
68 */ |
|
69 void IncreaseIV(TDes8& iv); |
|
70 |
|
71 #ifdef EUNIT_TESTING |
|
72 friend class UT_CSrtpAESCTRCrypto; |
|
73 #endif |
|
74 }; |
|
75 |
|
76 #endif // __SrtpAESCTRCrypto_H__ |