com.microsoft.sqlserver.jdbc.SQLServerAeadAes256CbcHmac256Factory Maven / Gradle / Ivy

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Microsoft JDBC Driver for SQL Server.
There is a newer version: 12.8.1.jre11
//---------------------------------------------------------------------------------------------------------------------------------
// 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);
	}

}