2 // Copyright (c) 2012 Samsung Electronics Co., Ltd.
4 // Licensed under the Apache License, Version 2.0 (the License);
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
8 // http://www.apache.org/licenses/LICENSE-2.0
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
18 * @file FSecCryptoCastCipher.h
19 * @brief This is the header file for the %CastCipher class.
21 * This header file contains the declarations of the %CastCipher class.
23 #ifndef _FSEC_CRYPTO_CAST_CIPHER_H_
24 #define _FSEC_CRYPTO_CAST_CIPHER_H_
26 #include <FSecCryptoISymmetricCipher.h>
31 namespace Tizen { namespace Security { namespace Crypto
34 class _SymmetricCipher;
37 * @brief This class provides methods for encryption and decryption using the CAST-128 algorithm.
41 * The %CastCipher class provides a symmetric cipher using the CAST-128 algorithm.
42 * Set appropriate values for the requested mode/key bit/padding scheme and cipher operation mode (::CIPHER_ENCRYPT
43 * 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_ CastCipher
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 ~CastCipher(void);
73 * Initializes this instance of %CastCipher with the specified parameters.
77 * @return An error code
78 * @param[in] transformation The name of the requested key bit/padding scheme @n
79 * The valid values for %CastCipher are "128/PKCS7PADDING" and "128/NOPADDING".
80 * @param[in] opMode The cipher operation mode @n
81 * The valid values for %CastCipher are @c CIPHER_ENCRYPT and @c CIPHER_DECRYPT.
82 * @exception E_SUCCESS The method is successful.
83 * @exception E_OUT_OF_MEMORY The memory is insufficient.
84 * @exception E_INVALID_ARG A specified input parameter is invalid, or the specified @c opMode does not contain a valid value for the cipher operation.
85 * @remarks If @c opMode is not matching the actual operation, the result of the operation is @c null and an exception is returned. @n
86 * 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.
88 virtual result Construct(const Tizen::Base::String& transformation, enum CipherOperation opMode);
91 * Sets a symmetric key for encryption or decryption.
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 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).
120 * @pre Before calling this method, a secret key and an initial vector should be set using SetKey() and SetInitialVector().
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.
135 virtual Tizen::Base::ByteBuffer* EncryptN(const Tizen::Base::ByteBuffer& input);
138 * Decrypts the data (single-part).
141 * @pre Before calling this method, a secret key and an initial vector should be set using SetKey() and SetInitialVector().
142 * @return A pointer to the Tizen::Base::ByteBuffer class that contains the output, @n
143 * else @c null if an error occurs
144 * @param[in] input An instance of Tizen::Base::ByteBuffer
145 * @exception E_SUCCESS The method is successful.
146 * @exception E_INVALID_ARG The specified instance of Tizen::Base::ByteBuffer is invalid or empty.
147 * @exception E_OUT_OF_MEMORY The memory is insufficient.
148 * @exception E_KEY_NOT_FOUND The specified key is not found.
149 * @exception E_INVALID_OPERATION The specified cipher operation mode for this method is invalid.
150 * @exception E_OVERFLOW This operation has caused the memory to overflow.
151 * @exception E_SYSTEM A system error has occurred. @n
152 * The method has failed to operate with the openssl library, or
153 * the Tizen::Base::ByteBuffer operation has failed.
154 * @remarks The specific error code can be accessed using the GetLastResult() method.
156 virtual Tizen::Base::ByteBuffer* DecryptN(const Tizen::Base::ByteBuffer& input);
159 * Initializes a multiple-part encryption or decryption operation.
162 * @pre Before calling this method, a secret key and an initial vector should be set using SetKey() and SetInitialVector().
163 * @return An error code
164 * @exception E_SUCCESS The method is successful.
165 * @exception E_OUT_OF_MEMORY The memory is insufficient.
166 * @exception E_KEY_NOT_FOUND The specified key is not found.
167 * @exception E_INVALID_OPERATION The specified cipher operation mode for this method is invalid.
168 * @exception E_SYSTEM A system error has occurred. @n
169 * The method has failed to operate with the openssl library.
171 virtual result Initialize(void);
174 * Updates a multiple-part encryption or decryption operation.
178 * @return A pointer to the Tizen::Base::ByteBuffer class that contains the output, @n
179 * else @c null if an error occurs
180 * @param[in] input An instance of Tizen::Base::ByteBuffer
181 * @exception E_SUCCESS The method is successful.
182 * @exception E_OUT_OF_MEMORY The memory is insufficient.
183 * @exception E_OVERFLOW This operation has caused the memory to overflow.
184 * @exception E_INVALID_ARG The specified instance of Tizen::Base::ByteBuffer is invalid or empty.
185 * @exception E_SYSTEM A system error has occurred. @n
186 * The method has failed to operate with the openssl library, or
187 * the Tizen::Base::ByteBuffer operation has failed.
188 * @remarks The specific error code can be accessed using the GetLastResult() method.
190 virtual Tizen::Base::ByteBuffer* UpdateN(const Tizen::Base::ByteBuffer& input);
193 * Finalizes a multiple-part encryption or decryption operation.
197 * @return A pointer to the Tizen::Base::ByteBuffer class that contains the output, @n
198 * else @c null if an error occurs
199 * @exception E_SUCCESS The method is successful.
200 * @exception E_OUT_OF_MEMORY The memory is insufficient.
201 * @exception E_OVERFLOW This operation has caused the memory to overflow.
202 * @exception E_SYSTEM A system error has occurred. @n
203 * The method has failed to operate with the openssl library, or
204 * the Tizen::Base::ByteBuffer operation has failed.
205 * @remarks The specific error code can be accessed using the GetLastResult() method.
207 virtual Tizen::Base::ByteBuffer* FinalizeN(void);
214 * @return A pointer to the Tizen::Base::ByteBuffer class that contains the output, @n
215 * else @c null if an error occurs
216 * @param[in] secretKey The secret key to wrap
217 * @remarks This operation is not supported in the %CastCipher class.
218 * Therefore, this method always returns @c null.
219 * @remarks The @c E_UNSUPPORTED_ALGORITHM exception is returned if the GetLastResult() method is called.
221 virtual Tizen::Base::ByteBuffer* WrapN(const Tizen::Base::ByteBuffer& secretKey);
224 * Unwraps a previously wrapped key.
228 * @return A pointer to the Tizen::Base::ByteBuffer class that contains the output, @n
229 * else @c null if an error occurs
230 * @param[in] wrappedKey The wrapped key to unwrap
231 * @remarks This operation is not supported in the %CastCipher class.
232 * Therefore, this method always returns @c null.
233 * @remarks The @c E_UNSUPPORTED_ALGORITHM exception is returned if the GetLastResult() method is called.
235 virtual Tizen::Base::ByteBuffer* UnwrapN(const Tizen::Base::ByteBuffer& wrappedKey);
240 // The implementation of this copy constructor is intentionally blank and declared as private to prohibit copying of objects.
244 CastCipher(const CastCipher& rhs);
247 // The implementation of this copy assignment operator is intentionally blank and declared as private to prohibit copying of objects.
251 CastCipher& operator =(const CastCipher& rhs);
254 _SymmetricCipher* __pSymmetricCipher;
255 const evp_cipher_st* __pCipherAlgorithm;
256 Tizen::Base::String __cipherAlgorithm;
258 class _CastCipherImpl* __pCastCipherImpl;
259 friend class _CastCipherImpl;
263 } } } //Tizen::Security::Crypto
265 #endif //_FSEC_CRYPTO_CAST_CIPHER_H_