Massive package refactoring

[lgpl/argeo-commons.git] / org.argeo.cms / src / org / argeo / cms / directory / ldap / IpaUtils.java

diff --git a/org.argeo.cms/src/org/argeo/cms/directory/ldap/IpaUtils.java b/org.argeo.cms/src/org/argeo/cms/directory/ldap/IpaUtils.java
new file mode 100644 (file)
index 0000000..a31cdac
--- /dev/null
+++ b/org.argeo.cms/src/org/argeo/cms/directory/ldap/IpaUtils.java
@@ -0,0 +1,141 @@
+package org.argeo.cms.directory.ldap;
+
+import java.io.IOException;
+import java.net.InetAddress;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.ArrayList;
+import java.util.Dictionary;
+import java.util.Hashtable;
+import java.util.List;
+import java.util.StringJoiner;
+
+import javax.naming.InvalidNameException;
+import javax.naming.ldap.LdapName;
+
+import org.argeo.api.acr.ldap.LdapAttrs;
+import org.argeo.cms.dns.DnsBrowser;
+import org.argeo.cms.runtime.DirectoryConf;
+
+/** Free IPA specific conventions. */
+public class IpaUtils {
+       public final static String IPA_USER_BASE = "cn=users";
+       public final static String IPA_GROUP_BASE = "cn=groups";
+       public final static String IPA_ROLE_BASE = "cn=roles";
+       public final static String IPA_SERVICE_BASE = "cn=services";
+
+       public final static String IPA_ACCOUNTS_BASE = "cn=accounts";
+
+       private final static String KRB_PRINCIPAL_NAME = LdapAttrs.krbPrincipalName.name().toLowerCase();
+
+       public final static String IPA_USER_DIRECTORY_CONFIG = DirectoryConf.userBase + "=" + IPA_USER_BASE + "&"
+                       + DirectoryConf.groupBase + "=" + IPA_GROUP_BASE + "&" + DirectoryConf.systemRoleBase + "=" + IPA_ROLE_BASE
+                       + "&" + DirectoryConf.readOnly + "=true";
+
+       @Deprecated
+       static String domainToUserDirectoryConfigPath(String realm) {
+               return domainToBaseDn(realm) + "?" + IPA_USER_DIRECTORY_CONFIG + "&" + DirectoryConf.realm.name() + "=" + realm;
+       }
+
+       public static void addIpaConfig(String realm, Dictionary<String, Object> properties) {
+               properties.put(DirectoryConf.baseDn.name(), domainToBaseDn(realm));
+               properties.put(DirectoryConf.realm.name(), realm);
+               properties.put(DirectoryConf.userBase.name(), IPA_USER_BASE);
+               properties.put(DirectoryConf.groupBase.name(), IPA_GROUP_BASE);
+               properties.put(DirectoryConf.systemRoleBase.name(), IPA_ROLE_BASE);
+               properties.put(DirectoryConf.readOnly.name(), Boolean.TRUE.toString());
+       }
+
+       public static String domainToBaseDn(String domain) {
+               String[] dcs = domain.split("\\.");
+               StringJoiner sj = new StringJoiner(",");
+               for (int i = 0; i < dcs.length; i++) {
+                       String dc = dcs[i];
+                       sj.add(LdapAttrs.dc.name() + '=' + dc.toLowerCase());
+               }
+               return IPA_ACCOUNTS_BASE + ',' + sj.toString();
+       }
+
+       public static LdapName kerberosToDn(String kerberosName) {
+               String[] kname = kerberosName.split("@");
+               String username = kname[0];
+               String baseDn = domainToBaseDn(kname[1]);
+               String dn;
+               if (!username.contains("/"))
+                       dn = LdapAttrs.uid + "=" + username + "," + IPA_USER_BASE + "," + baseDn;
+               else
+                       dn = KRB_PRINCIPAL_NAME + "=" + kerberosName + "," + IPA_SERVICE_BASE + "," + baseDn;
+               try {
+                       return new LdapName(dn);
+               } catch (InvalidNameException e) {
+                       throw new IllegalArgumentException("Badly formatted name for " + kerberosName + ": " + dn);
+               }
+       }
+
+       private IpaUtils() {
+
+       }
+
+       public static String kerberosDomainFromDns() {
+               String kerberosDomain;
+               try (DnsBrowser dnsBrowser = new DnsBrowser()) {
+                       InetAddress localhost = InetAddress.getLocalHost();
+                       String hostname = localhost.getHostName();
+                       String dnsZone = hostname.substring(hostname.indexOf('.') + 1);
+                       kerberosDomain = dnsBrowser.getRecord("_kerberos." + dnsZone, "TXT");
+                       return kerberosDomain;
+               } catch (IOException e) {
+                       throw new IllegalStateException("Cannot determine Kerberos domain from DNS", e);
+               }
+
+       }
+
+       public static Dictionary<String, Object> convertIpaUri(URI uri) {
+               String path = uri.getPath();
+               String kerberosRealm;
+               if (path == null || path.length() <= 1) {
+                       kerberosRealm = kerberosDomainFromDns();
+               } else {
+                       kerberosRealm = path.substring(1);
+               }
+
+               if (kerberosRealm == null)
+                       throw new IllegalStateException("No Kerberos domain available for " + uri);
+               // TODO intergrate CA certificate in truststore
+               // String schemeToUse = SCHEME_LDAPS;
+               String schemeToUse = DirectoryConf.SCHEME_LDAP;
+               List<String> ldapHosts;
+               String ldapHostsStr = uri.getHost();
+               if (ldapHostsStr == null || ldapHostsStr.trim().equals("")) {
+                       try (DnsBrowser dnsBrowser = new DnsBrowser()) {
+                               ldapHosts = dnsBrowser.getSrvRecordsAsHosts("_ldap._tcp." + kerberosRealm.toLowerCase(),
+                                               schemeToUse.equals(DirectoryConf.SCHEME_LDAP) ? true : false);
+                               if (ldapHosts == null || ldapHosts.size() == 0) {
+                                       throw new IllegalStateException("Cannot configure LDAP for IPA " + uri);
+                               } else {
+                                       ldapHostsStr = ldapHosts.get(0);
+                               }
+                       } catch (IOException e) {
+                               throw new IllegalStateException("Cannot convert IPA uri " + uri, e);
+                       }
+               } else {
+                       ldapHosts = new ArrayList<>();
+                       ldapHosts.add(ldapHostsStr);
+               }
+
+               StringBuilder uriStr = new StringBuilder();
+               try {
+                       for (String host : ldapHosts) {
+                               URI convertedUri = new URI(schemeToUse + "://" + host + "/");
+                               uriStr.append(convertedUri).append(' ');
+                       }
+               } catch (URISyntaxException e) {
+                       throw new IllegalStateException("Cannot convert IPA uri " + uri, e);
+               }
+
+               Hashtable<String, Object> res = new Hashtable<>();
+               res.put(DirectoryConf.uri.name(), uriStr.toString());
+               addIpaConfig(kerberosRealm, res);
+               return res;
+       }
+}