2 // Open Service Platform
3 // Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 // Licensed under the Apache License, Version 2.0 (the License);
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
9 // http://www.apache.org/licenses/LICENSE-2.0
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
19 * @file FSecCryptoRc4Cipher.h
20 * @brief This is the header file for the %Rc4Cipher class.
22 * This header file contains the declarations of the %Rc4Cipher class.
24 #ifndef _FSEC_CRYPTO_RC4_CIPHER_H_
25 #define _FSEC_CRYPTO_RC4_CIPHER_H_
27 #include <FSecCryptoISymmetricCipher.h>
32 namespace Tizen { namespace Security { namespace Crypto
35 class _SymmetricCipher;
38 * @brief This class provides methods for encryption and decryption operations using the RC4 algorithm.
42 * The %Rc4Cipher class provides a symmetric cipher using the RC4 algorithm.
43 * It sets appropriate values for the requested mode/key bit/padding scheme and cipher operation (CIPHER_ENCRYPT or CIPHER_DECRYPT) parameters. @n
45 * For more information on the class features, see <a href="../org.tizen.native.appprogramming/html/guide/security/ciphers.htm">Ciphers</a>.
47 * @see ISymmetricCipher
51 class _OSP_EXPORT_ Rc4Cipher
52 : public virtual ISymmetricCipher
53 , public Tizen::Base::Object
58 * The object is not fully constructed after this constructor is called. For full construction, @n
59 * the Construct() method must be called right after calling this constructor.
66 * This destructor overrides Tizen::Base::Object::~Object().
70 virtual ~Rc4Cipher(void);
73 * Constructs and initializes an instance of %Rc4Cipher with the specified parameters.
77 * @return An error code
78 * @param[in] transformation The only valid value for %Rc4Cipher for transformation is "NONE"
79 * @param[in] opMode The cipher operation mode @n
80 * The valid values for %Rc4Cipher are @c CIPHER_ENCRYPT and @c CIPHER_DECRYPT.
81 * @exception E_SUCCESS The method is successful.
82 * @exception E_OUT_OF_MEMORY The memory is insufficient.
83 * @exception E_INVALID_ARG A specified input parameter is invalid.
84 * @remarks If @c opMode is not matching the actual operation, the result of the operation is @c null and an exception is returned. @n
85 * For example, if @c opMode is set to @c CIPHER_ENCRYPT, @c CIPHER_WRAP, or @c CIPHER_UNWRAP and the DecryptN() method is used, then the result obtained is @c null and an exception is returned.
87 virtual result Construct(const Tizen::Base::String& transformation, enum CipherOperation opMode);
90 * Sets a symmetric key for encryption or decryption operation. @n
91 * The variable length key ranges from 40 bits to 256 bits, in steps of 8 bits.
95 * @return An error code
96 * @param[in] key An instance of ISecretKey
97 * @exception E_SUCCESS The method is successful.
98 * @exception E_INVALID_ARG The specified @c key is invalid.
99 * @exception E_OUT_OF_MEMORY The memory is insufficient.
101 virtual result SetKey(const Tizen::Security::ISecretKey& key);
104 * Sets the initial vector.
108 * @return An error code
109 * @param[in] initialVector The initial vector
110 * @exception E_SUCCESS The method is successful.
111 * @exception E_INVALID_ARG The specified input parameter is invalid.
112 * @exception E_OUT_OF_MEMORY The memory is insufficient.
114 virtual result SetInitialVector(const Tizen::Base::ByteBuffer& initialVector);
117 * Encrypts the data (single-part).
121 * @return A pointer to the Tizen::Base::ByteBuffer class that contains the output, @n
122 * else @c null if an error occurs
123 * @param[in] input An instance of Tizen::Base::ByteBuffer
124 * @exception E_SUCCESS The method is successful.
125 * @exception E_INVALID_ARG The specified instance of Tizen::Base::ByteBuffer is invalid or empty.
126 * @exception E_OUT_OF_MEMORY The memory is insufficient.
127 * @exception E_KEY_NOT_FOUND The specified key is not found.
128 * @exception E_INVALID_OPERATION The specified cipher operation mode for this method is invalid.
129 * @exception E_OVERFLOW This operation has caused the memory to overflow.
130 * @exception E_SYSTEM A system error has occurred. @n
131 * The method has failed to operate with the OpenSSL library, or
132 * the Tizen::Base::ByteBuffer operation has failed.
133 * @remarks The specific error code can be accessed using the GetLastResult() method.
134 * @remarks A secret key and an initial vector are set before calling this method.
136 virtual Tizen::Base::ByteBuffer* EncryptN(const Tizen::Base::ByteBuffer& input);
139 * Decrypts the data (single-part).
143 * @return A pointer to the Tizen::Base::ByteBuffer class that contains the output, @n
144 * else @c null if an error occurs
145 * @param[in] input An instance of Tizen::Base::ByteBuffer
146 * @exception E_SUCCESS The method is successful.
147 * @exception E_INVALID_ARG The specified instance of Tizen::Base::ByteBuffer is invalid or empty.
148 * @exception E_OUT_OF_MEMORY The memory is insufficient.
149 * @exception E_KEY_NOT_FOUND The specified key is not found.
150 * @exception E_INVALID_OPERATION The specified cipher operation mode for this method is invalid.
151 * @exception E_OVERFLOW This operation has caused the memory to overflow.
152 * @exception E_SYSTEM A system error has occurred. @n
153 * The method has failed to operate with the OpenSSL library, or
154 * the Tizen::Base::ByteBuffer operation has failed.
155 * @remarks The specific error code can be accessed using the GetLastResult() method.
156 * @remarks A secret key and an initial vector are set before calling this method.
158 virtual Tizen::Base::ByteBuffer* DecryptN(const Tizen::Base::ByteBuffer& input);
161 * Initializes a multiple-part encryption or decryption operation.
165 * @return An error code
166 * @exception E_SUCCESS The method is successful.
167 * @exception E_OUT_OF_MEMORY The memory is insufficient.
168 * @exception E_KEY_NOT_FOUND The specified key is not found.
169 * @exception E_INVALID_OPERATION The specified cipher operation mode for this method is invalid.
170 * @exception E_SYSTEM A system error has occurred. @n
171 * The method has failed to operate with the OpenSSL library.
172 * @remarks A secret key and an initial vector are set before calling this method.
174 virtual result Initialize(void);
177 * Updates a multiple-part encryption or decryption operation.
181 * @return A pointer to the Tizen::Base::ByteBuffer class that contains the output, @n
182 * else @c null if an error occurs
183 * @param[in] input An instance of Tizen::Base::ByteBuffer
184 * @exception E_SUCCESS The method is successful.
185 * @exception E_OUT_OF_MEMORY The memory is insufficient.
186 * @exception E_OVERFLOW This operation has caused the memory to overflow.
187 * @exception E_INVALID_ARG The specified instance of Tizen::Base::ByteBuffer is invalid or empty.
188 * @exception E_SYSTEM A system error has occurred. @n
189 * The method has failed to operate with the OpenSSL library, or
190 * the Tizen::Base::ByteBuffer operation has failed.
191 * @remarks The specific error code can be accessed using the GetLastResult() method.
193 virtual Tizen::Base::ByteBuffer* UpdateN(const Tizen::Base::ByteBuffer& input);
197 * Finalizes a multiple-part encryption or decryption operation.
201 * @return A pointer to the Tizen::Base::ByteBuffer class that contains the output, @n
202 * else @c null if an error occurs
203 * @exception E_SUCCESS The method is successful.
204 * @exception E_OUT_OF_MEMORY The memory is insufficient.
205 * @exception E_OVERFLOW This operation has caused the memory to overflow.
206 * @exception E_SYSTEM A system error has occurred. @n
207 * The method has failed to operate with the OpenSSL library, or
208 * the Tizen::Base::ByteBuffer operation has failed.
209 * @remarks This operation is not required for RC4. Always return @c null if this method is called.
211 virtual Tizen::Base::ByteBuffer* FinalizeN(void);
218 * @return A pointer to the Tizen::Base::ByteBuffer class that contains the output, @n
219 * else @c null if an error occurs
220 * @param[in] secretKey The secret key to wrap
221 * @remarks This operation is not supported in the %Rc4Cipher class.
222 * Therefore, this method always returns @c null.
223 * @remarks The @c E_UNSUPPORTED_ALGORITHM is returned using the GetLastResult() method.
225 virtual Tizen::Base::ByteBuffer* WrapN(const Tizen::Base::ByteBuffer& secretKey);
228 * Unwraps a previously wrapped key.
232 * @return A pointer to the Tizen::Base::ByteBuffer class that contains the output, @n
233 * else @c null if an error occurs
234 * @param[in] wrappedKey The wrapped key to unwrap
235 * @remarks This operation is not supported in the %Rc4Cipher class.
236 * Therefore, this method always returns @c null.
237 * @remarks The @c E_UNSUPPORTED_ALGORITHM is returned using the GetLastResult() method.
239 virtual Tizen::Base::ByteBuffer* UnwrapN(const Tizen::Base::ByteBuffer& wrappedKey);
244 // The implementation of this copy constructor is intentionally blank and declared as private to prohibit copying of objects.
248 Rc4Cipher(const Rc4Cipher& rhs);
251 // The implementation of this copy assignment operator is intentionally blank and declared as private to prohibit copying of objects.
255 Rc4Cipher& operator =(const Rc4Cipher& rhs);
258 _SymmetricCipher* __pSymmetricCipher;
259 const evp_cipher_st* __pCipherAlgorithm;
260 Tizen::Base::String __cipherAlgorithm;
262 class _Rc4CipherImpl* __pRc4CipherImpl;
263 friend class _Rc4CipherImpl;
267 } } } // Tizen::Security::Crypto
269 #endif // _FSEC_CRYPTO_RC4_CIPHER_H_