public X509Configurer<H> subjectPrincipalRegex(String subjectPrincipalRegex) {
		SubjectDnX509PrincipalExtractor principalExtractor = new SubjectDnX509PrincipalExtractor();
		principalExtractor.setSubjectDnRegex(subjectPrincipalRegex);
		this.x509PrincipalExtractor = principalExtractor;
		return this;
	}