V ověření proti AD lze nyní nastavit UPN suffix pro vyhledání objektu uživatele v AD. Pokud uživatel se zadaným suffixem nebude nalezen, použije se jako suffix název domény.
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package info.bukova.isspst.security;
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import org.springframework.ldap.core.DirContextOperations;
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import org.springframework.ldap.core.DistinguishedName;
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import org.springframework.ldap.support.LdapUtils;
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import org.springframework.security.authentication.AccountExpiredException;
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import org.springframework.security.authentication.BadCredentialsException;
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import org.springframework.security.authentication.CredentialsExpiredException;
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import org.springframework.security.authentication.DisabledException;
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import org.springframework.security.authentication.LockedException;
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import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
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import org.springframework.security.core.GrantedAuthority;
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import org.springframework.security.core.authority.AuthorityUtils;
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import org.springframework.security.core.authority.SimpleGrantedAuthority;
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import org.springframework.security.ldap.SpringSecurityLdapTemplate;
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import org.springframework.security.ldap.authentication.AbstractLdapAuthenticationProvider;
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import org.springframework.util.Assert;
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import org.springframework.util.StringUtils;
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import javax.naming.AuthenticationException;
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import javax.naming.Context;
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import javax.naming.NamingException;
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import javax.naming.OperationNotSupportedException;
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import javax.naming.directory.DirContext;
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import javax.naming.directory.SearchControls;
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import javax.naming.ldap.InitialLdapContext;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Hashtable;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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public class AdAuthenticationProvider extends AbstractLdapAuthenticationProvider{
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private static final Pattern SUB_ERROR_CODE = Pattern.compile(".*data\\s([0-9a-f]{3,4}).*");
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// Error codes
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private static final int USERNAME_NOT_FOUND = 0x525;
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private static final int INVALID_PASSWORD = 0x52e;
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private static final int NOT_PERMITTED = 0x530;
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private static final int PASSWORD_EXPIRED = 0x532;
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private static final int ACCOUNT_DISABLED = 0x533;
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private static final int ACCOUNT_EXPIRED = 0x701;
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private static final int PASSWORD_NEEDS_RESET = 0x773;
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private static final int ACCOUNT_LOCKED = 0x775;
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private final String domain;
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private final String rootDn;
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private final String url;
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private final String upnSuffix;
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private boolean convertSubErrorCodesToExceptions;
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// Only used to allow tests to substitute a mock LdapContext
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ContextFactory contextFactory = new ContextFactory();
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/**
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* @param domain the domain for which authentication should take place
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*/
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// public ActiveDirectoryLdapAuthenticationProvider(String domain) {
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// this (domain, null);
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// }
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/**
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* @param domain the domain name (may be null or empty)
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* @param url an LDAP url (or multiple URLs)
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*/
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public AdAuthenticationProvider(String domain, String upnSuffix, String url) {
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Assert.isTrue(StringUtils.hasText(url), "Url cannot be empty");
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this.domain = StringUtils.hasText(domain) ? domain.toLowerCase() : null;
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//this.url = StringUtils.hasText(url) ? url : null;
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this.url = url;
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this.upnSuffix = upnSuffix;
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rootDn = this.domain == null ? null : rootDnFromDomain(this.domain);
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}
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@Override
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protected DirContextOperations doAuthentication(UsernamePasswordAuthenticationToken auth) {
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String username = auth.getName();
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String password = (String)auth.getCredentials();
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DirContext ctx = bindAsUser(username, password);
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try {
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return searchForUser(ctx, username);
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} catch (NamingException e) {
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logger.error("Failed to locate directory entry for authenticated user: " + username, e);
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throw badCredentials();
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} finally {
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LdapUtils.closeContext(ctx);
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}
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}
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/**
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* Creates the user authority list from the values of the {@code memberOf} attribute obtained from the user's
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* Active Directory entry.
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*/
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@Override
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protected Collection<? extends GrantedAuthority> loadUserAuthorities(DirContextOperations userData, String username, String password) {
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String[] groups = userData.getStringAttributes("memberOf");
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if (groups == null) {
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logger.debug("No values for 'memberOf' attribute.");
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return AuthorityUtils.NO_AUTHORITIES;
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}
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if (logger.isDebugEnabled()) {
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logger.debug("'memberOf' attribute values: " + Arrays.asList(groups));
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}
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ArrayList<GrantedAuthority> authorities = new ArrayList<GrantedAuthority>(groups.length);
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for (String group : groups) {
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authorities.add(new SimpleGrantedAuthority(new DistinguishedName(group).removeLast().getValue()));
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}
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return authorities;
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}
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private DirContext bindAsUser(String username, String password) {
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// TODO. add DNS lookup based on domain
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final String bindUrl = url;
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Hashtable<String,String> env = new Hashtable<String,String>();
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env.put(Context.SECURITY_AUTHENTICATION, "simple");
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String bindPrincipal = createBindPrincipal(username);
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env.put(Context.SECURITY_PRINCIPAL, bindPrincipal);
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env.put(Context.PROVIDER_URL, bindUrl);
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env.put(Context.SECURITY_CREDENTIALS, password);
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env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
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try {
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return contextFactory.createContext(env);
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} catch (NamingException e) {
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if ((e instanceof AuthenticationException) || (e instanceof OperationNotSupportedException)) {
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handleBindException(bindPrincipal, e);
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throw badCredentials();
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} else {
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throw LdapUtils.convertLdapException(e);
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}
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}
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}
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void handleBindException(String bindPrincipal, NamingException exception) {
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if (logger.isDebugEnabled()) {
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logger.debug("Authentication for " + bindPrincipal + " failed:" + exception);
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}
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int subErrorCode = parseSubErrorCode(exception.getMessage());
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if (subErrorCode > 0) {
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logger.info("Active Directory authentication failed: " + subCodeToLogMessage(subErrorCode));
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if (convertSubErrorCodesToExceptions) {
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raiseExceptionForErrorCode(subErrorCode);
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}
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} else {
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logger.debug("Failed to locate AD-specific sub-error code in message");
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}
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}
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int parseSubErrorCode(String message) {
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Matcher m = SUB_ERROR_CODE.matcher(message);
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if (m.matches()) {
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return Integer.parseInt(m.group(1), 16);
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}
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return -1;
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}
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void raiseExceptionForErrorCode(int code) {
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switch (code) {
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case PASSWORD_EXPIRED:
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throw new CredentialsExpiredException(messages.getMessage("LdapAuthenticationProvider.credentialsExpired",
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"User credentials have expired"));
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case ACCOUNT_DISABLED:
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throw new DisabledException(messages.getMessage("LdapAuthenticationProvider.disabled",
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"User is disabled"));
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case ACCOUNT_EXPIRED:
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throw new AccountExpiredException(messages.getMessage("LdapAuthenticationProvider.expired",
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"User account has expired"));
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case ACCOUNT_LOCKED:
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throw new LockedException(messages.getMessage("LdapAuthenticationProvider.locked",
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"User account is locked"));
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}
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}
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String subCodeToLogMessage(int code) {
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switch (code) {
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case USERNAME_NOT_FOUND:
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return "User was not found in directory";
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case INVALID_PASSWORD:
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return "Supplied password was invalid";
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case NOT_PERMITTED:
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return "User not permitted to logon at this time";
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case PASSWORD_EXPIRED:
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return "Password has expired";
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case ACCOUNT_DISABLED:
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return "Account is disabled";
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case ACCOUNT_EXPIRED:
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return "Account expired";
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case PASSWORD_NEEDS_RESET:
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return "User must reset password";
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case ACCOUNT_LOCKED:
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return "Account locked";
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}
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return "Unknown (error code " + Integer.toHexString(code) +")";
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}
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private BadCredentialsException badCredentials() {
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return new BadCredentialsException(messages.getMessage(
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"LdapAuthenticationProvider.badCredentials", "Bad credentials"));
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}
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private DirContextOperations searchForUser(DirContext ctx, String username) throws NamingException {
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SearchControls searchCtls = new SearchControls();
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searchCtls.setSearchScope(SearchControls.SUBTREE_SCOPE);
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String searchFilter = "(&(objectClass=user)(userPrincipalName={0}))";
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final String bindPrincipal = createBindPrincipal(username);
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final String searchDn = createSearchDn(username);
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String searchRoot = rootDn != null ? rootDn : searchRootFromPrincipal(bindPrincipal);
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DirContextOperations ctxOp;
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try {
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ctxOp = SpringSecurityLdapTemplate.searchForSingleEntryInternal(ctx, searchCtls, searchRoot, searchFilter,
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new Object[]{searchDn});
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if (ctxOp != null) {
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return ctxOp;
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}
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} catch (Exception e) {
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logger.warn("UPN " + searchDn + " not found. Falling back to search with domain UPN suffix.");
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}
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return SpringSecurityLdapTemplate.searchForSingleEntryInternal(ctx, searchCtls, searchRoot, searchFilter,
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new Object[]{bindPrincipal});
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}
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private String searchRootFromPrincipal(String bindPrincipal) {
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int atChar = bindPrincipal.lastIndexOf('@');
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if (atChar < 0) {
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logger.debug("User principal '" + bindPrincipal + "' does not contain the domain, and no domain has been configured");
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throw badCredentials();
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}
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return rootDnFromDomain(bindPrincipal.substring(atChar+ 1, bindPrincipal.length()));
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}
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private String rootDnFromDomain(String domain) {
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String[] tokens = StringUtils.tokenizeToStringArray(domain, ".");
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StringBuilder root = new StringBuilder();
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for (String token : tokens) {
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if (root.length() > 0) {
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root.append(',');
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}
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root.append("dc=").append(token);
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}
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return root.toString();
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}
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String createBindPrincipal(String username) {
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if (domain == null || username.toLowerCase().endsWith(domain)) {
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return username;
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}
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return username + "@" + domain;
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}
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String createSearchDn(String username) {
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if (upnSuffix == null) {
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return createBindPrincipal(username);
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}
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return username + "@" + upnSuffix;
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}
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/**
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* By default, a failed authentication (LDAP error 49) will result in a {@code BadCredentialsException}.
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* <p>
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* If this property is set to {@code true}, the exception message from a failed bind attempt will be parsed
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* for the AD-specific error code and a {@link CredentialsExpiredException}, {@link DisabledException},
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* {@link AccountExpiredException} or {@link LockedException} will be thrown for the corresponding codes. All
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* other codes will result in the default {@code BadCredentialsException}.
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*
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* @param convertSubErrorCodesToExceptions {@code true} to raise an exception based on the AD error code.
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*/
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public void setConvertSubErrorCodesToExceptions(boolean convertSubErrorCodesToExceptions) {
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this.convertSubErrorCodesToExceptions = convertSubErrorCodesToExceptions;
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}
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static class ContextFactory {
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DirContext createContext(Hashtable<?,?> env) throws NamingException {
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return new InitialLdapContext(env, null);
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}
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}
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}
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@ -1,3 +1,4 @@
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ad.domain=bukova.net
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ad.upnSuffix=bukova.info
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ad.ldapUrl=ldap://192.168.25.110/
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ad.allowedGroup=ucitele
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