JEE CDI not working in еntity converter

I'm new to JEE and have an issue with CDI that I can not figure out by myself.

I have a simple converter class in which I try to inject an object which have to provide the conversion logic, but injection seems not to work for this case. The converter class looks like this:

@Converter(autoApply=false)
public class String2ByteArrayConverter implements AttributeConverter<String, byte[]>
{
    @Inject
    private Crypto crypto;

    @Override
    public byte[] convertToDatabaseColumn(String usrReadable) 
    {
        return crypto.pg_encrypt(usrReadable);
    }

    @Override
    public String convertToEntityAttribute(byte[] dbType)
    {
        return crypto.pg_decrypt(dbType);
    }
}

When the @Converter is triggered it throws an NullPointerException because the property crypto is not being initialized from the container. Why is that?

I'm using Glassfish 4 and in all other cases @Injection works just fine.

Is it not possible to use CDI on converters?

Any help will be appreciated :)