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protected void connect( LDAPConnection conn, String host, int port ) throws LDAPException { boolean needsPrivileges = true; /* Running stand-alone */ SecurityManager sec = SystemgetSecurityManager(); printDebug( "Security manager = " + sec ); if ( sec == null ) { printDebug( "No security manager" ); /* Not an applet; we can do what we want to */ needsPrivileges = false; /* Cannot do instanceof on an abstract class */ } else if ( sectoString()startsWith( "javalangNullSecurityManager") ) { printDebug( "No security manager" ); /* Not an applet; we can do what we want to */ needsPrivileges = false; } else if ( sectoString()startsWith( "netscapesecurityAppletSecurity" ) ) { /* Connecting to the local host */ try { if ( hostequalsIgnoreCase( javanetInetAddressgetLocalHost()getHostName() ) ) needsPrivileges = false; } catch ( javanetUnknownHostException e ) { } } if ( needsPrivileges ) { /* Running as applet Is PrivilegeManager around */ String mgr = "netscapesecurityPrivilegeManager"; try { Class c = ClassforName( mgr ); javalangreflectMethod[] m = cgetMethods(); if ( m != null ) { for( int i = 0; i < mlength; i++ ) { if ( m[i]getName()equals( "enablePrivilege" ) ) { try { Object[] args = new Object[1]; args[0] = new String( "UniversalConnect" ); m[i]invoke( null, args );
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printDebug( "UniversalConnect enabled" ); } catch ( Exception e ) { printDebug( "Exception on invoking " + "enablePrivilege: " + etoString() ); break; } break; } } } } catch ( ClassNotFoundException e ) { printDebug( "no " + mgr ); } } connconnect( host, port ); setDefaultReferralCredentials( conn ); }
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The setDefaultReferralCredentials method, illustrated in the block of code that follows, creates and con gures an object used to handle any referrals encountered during a search The object holds the DN and password used to authenticate to the original server When the Bean is referred to another LDAP server, the DN and password in the object are used to authenticate to the new server
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protected void setDefaultReferralCredentials( LDAPConnection conn ) { final LDAPConnection m_conn = conn; LDAPRebind rebind = new LDAPRebind() { public LDAPRebindAuth getRebindAuthentication( String host, int port ) { return new LDAPRebindAuth( m_conngetAuthenticationDN(), m_conngetAuthenticationPassword() ); } }; LDAPSearchConstraints cons = conngetSearchConstraints(); conssetReferrals( true ); conssetRebindProc( rebind ); }
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In the following block of code, error codes are de ned for use by derived classes as well as by clients Clients do not need to know about the extensive list of error codes in LDAPException
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/* * Variables */ /* Error codes from public static final public static final public static final public static final public static final public static final public static final
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search operations, etc */ int OK = 0; int INVALID_PARAMETER = 1; int CONNECT_ERROR = 2; int AUTHENTICATION_ERROR = 3; int PROPERTY_NOT_FOUND = 4; int AMBIGUOUS_RESULTS = 5; int NO_SUCH_OBJECT = 6;
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Finally, variables storing the Bean properties are declared:
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private boolean _debug = false; private int _errCode = 0; private String _host = new String("localhost"); private int _port = 389; private int _scope = LDAPConnectionSCOPE_SUB; private String _base = new String(""); private String _filter = new String(""); private String _authDN = new String(""); private String _authPassword = new String(""); private String _userName = new String(""); private String _userID = new String(""); transient private PropertyChangeSupport m_propSupport = new PropertyChangeSupport( this );
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Many applications, particularly server-side applications, use a directory solely to authenticate a user (to determine if a user is who he says he is) We ve already looked at authenticating to the directory, starting in 6 Not much to it So why do we need a JavaBean to do authentication The answer will become apparent very soon LDAPSimpleAuth, illustrated in Figure 10-2, is a JavaBean for LDAP authentication As with all other JavaBeans, LDAPSimpleAuth is serializable and has a constructor with no parameters For convenience, it also has constructors to allow setting
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