Tomcat數據源鏈接池加密

咱們在使用Tomcat數據庫鏈接池的時候都是明文存儲數據庫用戶名和密碼的，例如：

<Resource name="ODS" type="javax.sql.DataSource" driverClassName="oracle.jdbc.driver.OracleDriver" url="jdbc:oracle:thin:@192.168.1.1:1521:dbid" username="oracle" password="oracle" maxIdle="4" maxActive="6" maxWait="5000" />

若是咱們不想讓數據庫的密碼暴露在web容器中怎麼辦呢？寫一個類繼承org.apache.commons.dbcp.BasicDataSourceFactory，而後指定factory=」*.EncryptedDataSourceFactory」爲你的自定義類，下面是相關代碼

package net.uni.ap.jdbc; import java.util.Enumeration; import java.util.Hashtable; import javax.naming.Context; import javax.naming.Name; import javax.naming.RefAddr; import javax.naming.Reference; import javax.naming.StringRefAddr; import org.apache.commons.dbcp.BasicDataSourceFactory; import com.fesco.fws.utils.TeaUtil; /** * * @author sunwill *
*/ public class EncryptedDataSourceFactory extends BasicDataSourceFactory { public Object getObjectInstance(Object obj, Name name, Context nameCtx, Hashtable environment) throws Exception { if (obj instanceof Reference) {
setUsername((Reference) obj); setPassword((Reference) obj); }
return super.getObjectInstance(obj, name, nameCtx, environment); } private void setUsername(Reference ref) throws Exception {
findDecryptAndReplace("username", ref); } private void setPassword(Reference ref) throws Exception {
findDecryptAndReplace("password", ref); } private void findDecryptAndReplace(String refType, Reference ref) throws Exception { int idx = find(refType, ref); String decrypted = decrypt(idx, ref); replace(idx, refType, decrypted, ref); }
private void replace(int idx, String refType, String newValue, Reference ref) throws Exception { ref.remove(idx);
ref.add(idx, new StringRefAddr(refType, newValue)); } private String decrypt(int idx, Reference ref) throws Exception { return TeaUtil.decryptByTea(ref.get(idx).getContent().toString()); }
private int find(String addrType, Reference ref) throws Exception {
Enumeration enu = ref.getAll(); for (int i = 0; enu.hasMoreElements(); i++) { RefAddr addr = (RefAddr) enu.nextElement(); if (addr.getType().compareTo(addrType) == 0) {
return i; } } throw new Exception("The "" + addrType + "" name/value pair was not found" + " in the Reference object. The reference Object is" + " " + ref.toString()); }}

其中紅色的地方是你的數據庫密碼解密方法，固然對應的也要有加密算法，加密後的串放到鏈接池的地方：

<Context path="">

<Resource name="ODS" type="javax.sql.DataSource"

driverClassName="oracle.jdbc.driver.OracleDriver"
factory="net.uni.ap.jdbc.EncryptedDataSourceFactory"
url="jdbc:oracle:thin:@192.168.1.1:1521:sid" username="oracle"
password="C65BD76C4CED33C446B289F64CAFACC5" maxIdle="4"
maxActive="6" maxWait="5000" /> </Context>