private String getFailedPrincipal(LoginState loginState) {
if (loginState == null) {
return null;
}
String principal = loginState.getUserDN();
if (principal != null) {
return DNUtils.DNtoName(principal);
}
principal = loginState.getFailureTokenId();
if (principal != null) {
return principal;
}
if (CollectionUtils.isNotEmpty(loginState.getAllReceivedCallbacks())) {
for (Callback[] cb : loginState.getAllReceivedCallbacks().values()) {
for (Callback aCb : cb) {
if (aCb instanceof NameCallback) {
return ((NameCallback) aCb).getName();
}
}
}
}
return null;
}
