1 /*

     2 * Copyright (c) 2008 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:  Base class for cipher algorithms which implements

    15  *                CSymmetricCipher.

    16  *

    17 */

    18 

    19 

    20 #ifndef STSSYMMETRICCIPHER_H

    21 #define STSSYMMETRICCIPHER_H

    22 

    23 //  INCLUDES

    24 #include <string>

    25 

    26 #include <openssl/evp.h>

    27 #include "stscipher.h"

    28 

    29 using namespace std;

    30 

    31 // CONSTANTS

    32 class CSymmetricCipher;

    33 class CBlockTransformation;

    34 class CPadding;

    35 

    36 namespace java

    37 {

    38 namespace satsa

    39 {

    40 // CLASS DECLARATION

    41 /**

    42  *  Base class for cipher algorithms which implements CSymmetricCipher.

    43  *  For every algorithm key validity must be checked in the subclasses

    44  *  because initialization with wrong size key causes a panic.

    45  *

    46  */

    47 class STSSymmetricCipher: public STSCipher

    48 {

    49 public:

    50     // Constructors and destructor

    51 

    52     /**

    53      * Destructor.

    54      */

    55     ~STSSymmetricCipher();

    56 

    57     static STSSymmetricCipher* Create(STSTransformation* aTransformation,

    58                                       int* errCode);

    59 

    60 public:

    61     // Functions from STSCipher

    62 

    63     jint DoInit(JNIEnv* aJni, const TCipherMode aMode,

    64                 const jstring aKeyAlgorithm, const jstring aKeyFormat,

    65                 const jbyteArray aKeyEncoded, const jbyteArray aParams);

    66 

    67     jint DoFinal(JNIEnv* aJni, jbyteArray aInput, jint aInputOffset,

    68                  jint aInputLength, jbyteArray aOutput, jint aOutputOffset);

    69 

    70     jint Update(JNIEnv* aJni, jbyteArray aInput, jint aInputOffset,

    71                 jint aInputLength, jbyteArray aOutput, jint aOutputOffset);

    72 

    73 protected:

    74 

    75     /**

    76      * C++ default constructor.

    77      */

    78     STSSymmetricCipher();

    79 

    80     int Construct(STSTransformation* aTransformation);

    81 

    82 private:

    83 

    84     // Provides symmetric cipher functionality.

    85     CSymmetricCipher* mCipher;

    86 

    87     // Bytes processed using Update method. Value is reset to 0 in Init

    88     // method.

    89     int mBytesProcessed;

    90 

    91     EVP_CIPHER_CTX *mCipherCtx;

    92     const EVP_CIPHER *mCipherType;

    93 

    94 };

    95 } // namespace satsa

    96 } // namespace java

    97 #endif // STSSYMMETRICCIPHER_H

    98 // End of File