kem-pbkdf2 {
{field . {map}}
{field a {str} =pbkdf2}
{field cek {bin} >0} {# wrapped CEK}
{field hash {str} >0} {# hash algorithm identifier}
{field iter {int} >0} {# number of iterations}
{field salt {bin} >0}
{field wrap {str} >0} {# key wrapping algorithm identifier}
}