src/main/java/com/amazon/dlic/auth/ldap/backend/LDAPAuthorizationBackend.java [1059:1110]:
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                    continue;
                }

                final Set<LdapName> in = resolveNestedRoles(nm, ldapConnection, userRoleName, depth, rolesearchEnabled,
                        nameRoleSearchBaseKeys);
                result.addAll(in);
            }
        }

        return result;
    }

    @Override
    public String getType() {
        return "ldap";
    }

    private boolean isValidDn(final String dn) {

        if (Strings.isNullOrEmpty(dn)) {
            return false;
        }

        try {
            new LdapName(dn);
        } catch (final Exception e) {
            return false;
        }

        return true;
    }

    private String getRoleFromEntry(final Connection ldapConnection, final LdapName ldapName, final String role) {

        if (ldapName == null || Strings.isNullOrEmpty(role)) {
            return null;
        }

        if("dn".equalsIgnoreCase(role)) {
            return ldapName.toString();
        }

        try {
            final LdapEntry roleEntry = LdapHelper.lookup(ldapConnection, ldapName.toString());

            if(roleEntry != null) {
                final LdapAttribute roleAttribute = roleEntry.getAttribute(role);
                if(roleAttribute != null) {
                    return Utils.getSingleStringValue(roleAttribute);
                }
            }
        } catch (LdapException e) {
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src/main/java/com/amazon/dlic/auth/ldap2/LDAPAuthorizationBackend2.java [506:557]:
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                    continue;
                }

                final Set<LdapName> in = resolveNestedRoles(nm, ldapConnection, userRoleName, depth, rolesearchEnabled,
                        nameRoleSearchBaseKeys);
                result.addAll(in);
            }
        }

        return result;
    }

    @Override
    public String getType() {
        return "ldap";
    }

    private boolean isValidDn(final String dn) {

        if (Strings.isNullOrEmpty(dn)) {
            return false;
        }

        try {
            new LdapName(dn);
        } catch (final Exception e) {
            return false;
        }

        return true;
    }

    private String getRoleFromEntry(final Connection ldapConnection, final LdapName ldapName, final String role) {

        if (ldapName == null || Strings.isNullOrEmpty(role)) {
            return null;
        }

        if("dn".equalsIgnoreCase(role)) {
            return ldapName.toString();
        }

        try {
            final LdapEntry roleEntry = LdapHelper.lookup(ldapConnection, ldapName.toString());

            if(roleEntry != null) {
                final LdapAttribute roleAttribute = roleEntry.getAttribute(role);
                if(roleAttribute != null) {
                    return Utils.getSingleStringValue(roleAttribute);
                }
            }
        } catch (LdapException e) {
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