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Microsoft JDBC Driver for SQL Server.
//---------------------------------------------------------------------------------------------------------------------------------
// File: SQLServerAeadAes256CbcHmac256Factory.java
//
//
// Microsoft JDBC Driver for SQL Server
// Copyright(c) Microsoft Corporation
// All rights reserved.
// MIT License
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files(the ""Software""),
// to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and / or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions :
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//---------------------------------------------------------------------------------------------------------------------------------
package com.microsoft.sqlserver.jdbc;
import java.io.UnsupportedEncodingException;
import java.sql.SQLException;
import java.text.MessageFormat;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import javax.xml.bind.DatatypeConverter;
/**
* Factory for SQLServerAeadAes256CbcHmac256Algorithm
*/
class SQLServerAeadAes256CbcHmac256Factory extends SQLServerEncryptionAlgorithmFactory{
// In future we can have more
private byte algorithmVersion=0x1;
private ConcurrentHashMap encryptionAlgorithms=new ConcurrentHashMap();
@Override
SQLServerEncryptionAlgorithm create(
SQLServerSymmetricKey columnEncryptionKey,
SQLServerEncryptionType encryptionType, String encryptionAlgorithm) throws SQLServerException {
assert(columnEncryptionKey!=null);
if(encryptionType!=SQLServerEncryptionType.Deterministic && encryptionType!=SQLServerEncryptionType.Randomized){
MessageFormat form =new MessageFormat(SQLServerException.getErrString("R_InvalidEncryptionType"));
Object[] msgArgs={encryptionType,encryptionAlgorithm,"'"+SQLServerEncryptionType.Deterministic+","+SQLServerEncryptionType.Randomized+"'"};
throw new SQLServerException(this, form.format(msgArgs), null, 0, false);
}
String factoryKey="";
try {
StringBuffer factoryKeyBuilder=new StringBuffer();
factoryKeyBuilder.append(
DatatypeConverter.printBase64Binary(
new String(
columnEncryptionKey.getRootKey(),
"UTF-8"
).getBytes()
)
);
factoryKeyBuilder.append(":");
factoryKeyBuilder.append(encryptionType);
factoryKeyBuilder.append(":");
factoryKeyBuilder.append(algorithmVersion);
factoryKey =factoryKeyBuilder.toString();
SQLServerAeadAes256CbcHmac256Algorithm aesAlgorithm;
if(!encryptionAlgorithms.containsKey(factoryKey)){
SQLServerAeadAes256CbcHmac256EncryptionKey encryptedKey = new SQLServerAeadAes256CbcHmac256EncryptionKey(columnEncryptionKey.getRootKey(), SQLServerAeadAes256CbcHmac256Algorithm.algorithmName);
aesAlgorithm = new SQLServerAeadAes256CbcHmac256Algorithm(encryptedKey, encryptionType, algorithmVersion);
encryptionAlgorithms.putIfAbsent(factoryKey, aesAlgorithm);
}
} catch (UnsupportedEncodingException e) {
MessageFormat form = new MessageFormat(
SQLServerException.getErrString("R_unsupportedEncoding"));
Object[] msgArgs = { "UTF-8" };
throw new SQLServerException(this, form.format(msgArgs), null, 0, false);
}
return encryptionAlgorithms.get(factoryKey);
}
}