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Java utility collections, development by Nervousync Studio (NSYC)
/*
* Licensed to the Nervousync Studio (NSYC) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.nervousync.security.crypto;
import org.nervousync.commons.Globals;
import org.nervousync.security.config.CipherConfig;
import org.nervousync.enumerations.crypto.CryptoMode;
import org.nervousync.exceptions.crypto.CryptoException;
import javax.crypto.BadPaddingException;
import javax.crypto.IllegalBlockSizeException;
import java.io.ByteArrayOutputStream;
/**
* Abstract symmetric crypto adapter class
* 对称加密解密适配器的抽象类
*
* @author Steven Wee [email protected]
* @version $Revision: 1.0.0 $ $Date: Jan 13, 2012 13:16:24 $
*/
public abstract class SymmetricCryptoAdapter extends BaseCryptoAdapter {
/**
* Result data bytes output stream
* 结果数据二进制数组输出流
*/
private ByteArrayOutputStream byteArrayOutputStream;
/**
* Constructor for SymmetricCryptoAdapter
* 对称加密解密适配器的抽象类的构造方法
*
* @param cipherConfig Cipher configure
* 密码设置
* @param cryptoMode Crypto mode
* 加密解密模式
* @param cipherKey Crypto key
* 加密解密密钥
*
* @throws CryptoException
* If an error occurs when initialize cipher
* 当初始化加密解密实例对象时出现异常
*/
protected SymmetricCryptoAdapter(final CipherConfig cipherConfig, final CryptoMode cryptoMode,
final CipherKey cipherKey) throws CryptoException {
super(cipherConfig, cryptoMode, cipherKey);
this.reset();
}
/**
* Append parts of given binary data array to current adapter
* 追加给定的二进制字节数组到当前适配器
*
* @param dataBytes binary data array
* 二进制字节数组
* @param position Data begin position
* 数据起始坐标
* @param length Length of data append
* 追加的数据长度
*
* @throws CryptoException
* If an error occurs when process data
* 当处理数据时出现异常
*/
@Override
public final void append(final byte[] dataBytes, final int position, final int length) throws CryptoException {
if (dataBytes.length < (position + length)) {
throw new CryptoException(0x000000150001L, "Length_Not_Enough_Crypto_Error");
}
switch (this.cryptoMode) {
case ENCRYPT:
case DECRYPT:
this.byteArrayOutputStream.write(dataBytes, position, length);
break;
default:
throw new CryptoException(0x000000150003L, "Mode_Invalid_Crypto_Error");
}
}
/**
* Append parts of given binary data array to current adapter and calculate final result
* 追加给定的二进制字节数组到当前适配器并计算最终结果
*
* @param dataBytes binary data array
* 二进制字节数组
* @param position Data begin position
* 数据起始坐标
* @param length Length of data append
* 追加的数据长度
*
* @return Calculate result data byte array
* 计算的二进制字节数组结果
*
* @throws CryptoException
* If an error occurs when process data
* 当处理数据时出现异常
*/
@Override
public final byte[] finish(final byte[] dataBytes, final int position, final int length) throws CryptoException {
switch (this.cryptoMode) {
case ENCRYPT:
case DECRYPT:
try {
this.byteArrayOutputStream.write(dataBytes, position, length);
return this.cipher.doFinal(this.byteArrayOutputStream.toByteArray(), Globals.INITIALIZE_INT_VALUE,
this.byteArrayOutputStream.size());
} catch (IllegalBlockSizeException | BadPaddingException e) {
throw new CryptoException(0x000000150004L, "Process_Data_Crypto_Error", e);
} finally {
this.reset();
}
case SIGNATURE:
case VERIFY:
throw new CryptoException(0x00000015000CL, "Not_Support_Mode_Crypto_Error");
default:
throw new CryptoException(0x000000150003L, "Mode_Invalid_Crypto_Error");
}
}
/**
* Verify given signature data bytes is valid
* 验证给定的签名二进制数据是合法的
*
* @param signature signature data bytes
* 签名二进制数据
*
* @return Verify result
* 验证结果
*
* @throws CryptoException
* If an error occurs when process data
* 当处理数据时出现异常
*/
@Override
public final boolean verify(final byte[] signature) throws CryptoException {
throw new CryptoException(0x00000015000CL, "Not_Support_Mode_Crypto_Error");
}
/**
* Reset current adapter
* 重置当前适配器
*
* @throws CryptoException
* If an error occurs when process data
* 当处理数据时出现异常
*/
@Override
public final void reset() throws CryptoException {
switch (this.cryptoMode) {
case ENCRYPT:
case DECRYPT:
this.cipher = this.initCipher();
this.byteArrayOutputStream = new ByteArrayOutputStream();
break;
default:
throw new CryptoException(0x000000150003L, "Mode_Invalid_Crypto_Error");
}
}
}