postgresql-jdbc throws NoClassDefFoundError StringPreparation during SCRAM-SHA-256 authentication

Issue

• Connecting to a FIPS-enabled PostgreSQL server using the Red Hat-provided postgresql-jdbc package fails when scram-sha-256 authentication is configured. The connection attempt terminates abruptly with a java.lang.NoClassDefFoundError.

• When running a Java application attempting to establish a connection via the default JDBC driver, the following exception stack trace occurs:

      Exception in thread "main" java.lang.NoClassDefFoundError: com/ongres/scram/common/stringprep/StringPreparation
      at org.postgresql.core.v3.ConnectionFactoryImpl.doAuthentication(ConnectionFactoryImpl.java:759)
      at org.postgresql.core.v3.ConnectionFactoryImpl.tryConnect(ConnectionFactoryImpl.java:161)
      ...
      Caused by: java.lang.ClassNotFoundException: com.ongres.scram.common.stringprep.StringPreparation
      at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
      ...