我正在使用Hibernate5和Postgres12.5。我正在尝试使用md5哈希密码进行身份验证。当我的应用程序尝试使用md5身份验证进行连接时，它不起作用，并且说是错误的密码。我可以通过psql登录使用密码，它的作品很好。我还使用jasypt（加密和解密密码的工具）解密了hibernate.cfg.xml文件中存储的密码，以检查加密的密码是什么，这也是正确的。如果我将postgres配置设置为trust，它就可以正常工作。
我的hibernate.cfg.xml文件如下所示：

<session-factory>
  <property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
  <property name="hibernate.connection.url">jdbc:postgresql://localhost:5432/mydatabasename</property>
  <property name="hibernate.connection.username">myusername</property>
  <property name="hibernate.connection.password">ENC(5aCn6qexVnhdt6BVIkqROYITzwxp9K)</property>
  <property name="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</property>
  <property name="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>

  <property name="hibernate.current_session_context_class">thread</property>

  <property name="hibernate.connection.encryptor_registered_name">configurationHibernateEncryptor</property>

  <property name="hibernate.connection.provider_class">org.jasypt.hibernate5.connectionprovider.EncryptedPasswordC3P0ConnectionProvider</property>

  Other non important properties...

 </session-factory>
</hibernate-configuration>

我的pg.hba.conf如下：

host    all             postgres        ::1/128                 md5
host    all             postgres        localhost               md5
host    databasename    myusername      all                     md5 
host    databasename    myusername      127.0.0.1/32            md5
host    databasename    myusername      ::1/128                 md5

我的hibernateutil.java如下：

import org.apache.log4j.Logger;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.jasypt.encryption.pbe.StandardPBEStringEncryptor;
import org.jasypt.hibernate5.encryptor.HibernatePBEEncryptorRegistry;

public class HibernateUtil
{
    private static Logger logger = Logger.getLogger(HibernateUtil.class);

    private static SessionFactory sessionFactory;

    private static Configuration configuration = null;

private HibernateUtil() 
     {  
     }  
     static
     {
         try 
         {
             StandardPBEStringEncryptor senc = new StandardPBEStringEncryptor();
             if (senc != null) 
             {
                 senc.setAlgorithm("PBEWithMD5AndDES");

                 senc.setPassword("privatekey");

                 HibernatePBEEncryptorRegistry hibReg = HibernatePBEEncryptorRegistry.getInstance();
                 if (hibReg != null)
                 {
                     hibReg.registerPBEStringEncryptor("configurationHibernateEncryptor", senc);
                 }
                 else
                 {
                     logger.error(new Throwable().fillInStackTrace().getStackTrace()[0].getMethodName()+
                                " Unable to register encryptor.");
                 }       
                 configuration = new Configuration();
                 sessionFactory = configuration.configure().buildSessionFactory();      
             }
         } 
         catch (Throwable ex) 
         {
             logger.error(new Throwable().fillInStackTrace().getStackTrace()[0].getMethodName()+
                        " Initial SessionFactory creation failed. " + ex);
             throw new ExceptionInInitializerError(ex);
         }
     }

如果有任何更多的信息，我可以提供请让我知道。谢谢你的帮助。