// ========================================================================
// Authors : Van den Broeke Iris, Deville Daniel, Dubois Roger, Greg Wilkins
// Copyright (c) 2001 Deville Daniel. All rights reserved.
// Permission to use, copy, modify and distribute this software
// for non-commercial or commercial purposes and without fee is
// hereby granted provided that this copyright notice appears in
// all copies.
// ========================================================================
package net.lightbody.bmp.proxy.jetty.http.handler;
import net.lightbody.bmp.proxy.jetty.http.*;
import net.lightbody.bmp.proxy.jetty.log.LogFactory;
import net.lightbody.bmp.proxy.jetty.util.*;
import org.apache.commons.logging.Log;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.security.Principal;
import java.util.*;
/* ------------------------------------------------------------ */
/** Handler to authenticate access using the Apache's .htaccess files.
*
* @version HTAccessHandler v1.0a
* @author Van den Broeke Iris
* @author Deville Daniel
* @author Dubois Roger
* @author Greg Wilkins
* @author Konstantin Metlov
*
*/
public class HTAccessHandler extends AbstractHttpHandler
{
private static Log log = LogFactory.getLog(HTAccessHandler.class);
String _default=null;
String _accessFile=".htaccess";
transient HashMap _htCache=new HashMap();
/* ------------------------------------------------------------ */
public void handle(String pathInContext,
String pathParams,
HttpRequest request,
HttpResponse response)
throws HttpException,IOException
{
String user=null;
String password=null;
boolean IPValid=true;
if(log.isDebugEnabled())log.debug("HTAccessHandler pathInContext="+pathInContext);
String credentials=request.getField(HttpFields.__Authorization);
if (credentials!=null)
{
credentials=credentials.substring(credentials.indexOf(' ')+1);
credentials=B64Code.decode(credentials,StringUtil.__ISO_8859_1);
int i=credentials.indexOf(':');
user=credentials.substring(0,i);
password=credentials.substring(i+1);
if(log.isDebugEnabled())log.debug("User="+user+", password="+
"******************************".substring(0,password.length()));
}
HTAccess ht=null;
try
{
Resource resource=null;
String directory=pathInContext.endsWith("/")
?pathInContext:
URI.parentPath(pathInContext);
// Look for htAccess resource
while (directory!=null)
{
String htPath=directory+_accessFile;
resource=getHttpContext().getResource(htPath);
if(log.isDebugEnabled())log.debug("directory="+directory+" resource="+resource);
if (resource!=null && resource.exists() && !resource.isDirectory())
break;
resource=null;
directory=URI.parentPath(directory);
}
// Try default directory
if (resource==null && _default!=null)
{
resource=Resource.newResource(_default);
if (!resource.exists() || resource.isDirectory())
return;
}
if (resource==null)
return;
if(log.isDebugEnabled())log.debug("HTACCESS="+resource);
ht=(HTAccess)_htCache.get(resource);
if (ht==null || ht.getLastModified()!=resource.lastModified())
{
ht=new HTAccess(resource);
_htCache.put(resource,ht);
if(log.isDebugEnabled())log.debug("HTCache loaded "+ht);
}
// prevent access to htaccess files
if (pathInContext.endsWith(_accessFile))
{
response.sendError(HttpResponse.__403_Forbidden);
request.setHandled(true);
return;
}
// See if there is a config problem
if (ht.isForbidden())
{
log.warn("Mis-configured htaccess: "+ht);
response.sendError(HttpResponse.__403_Forbidden);
request.setHandled(true);
return;
}
//first see if we need to handle based on method type
Map methods=ht.getMethods();
if (methods.size()>0 && !methods.containsKey(request.getMethod()))
return; //Nothing to check
// Check the accesss
int satisfy=ht.getSatisfy();
// second check IP address
IPValid=ht.checkAccess("",request.getRemoteAddr());
if(log.isDebugEnabled())log.debug("IPValid = "+IPValid);
// If IP is correct and satify is ANY then access is allowed
if (IPValid==true && satisfy==HTAccess.ANY)
return;
// If IP is NOT correct and satify is ALL then access is forbidden
if (IPValid==false && satisfy==HTAccess.ALL)
{
response.sendError(HttpResponse.__403_Forbidden);
request.setHandled(true);
return;
}
// set required page
if (!ht.checkAuth(user,password,getHttpContext(),request))
{
log.debug("Auth Failed");
response.setField(HttpFields.__WwwAuthenticate,"basic realm="+ht.getName());
response.sendError(HttpResponse.__401_Unauthorized);
response.commit();
request.setHandled(true);
return;
}
// set user
if (user!=null)
{
request.setAuthType(SecurityConstraint.__BASIC_AUTH);
request.setAuthUser(user);
}
}
catch (Exception ex)
{
log.warn(LogSupport.EXCEPTION,ex);
if (ht!=null)
{
response.sendError(HttpResponse.__500_Internal_Server_Error);
request.setHandled(true);
}
}
}
/* ------------------------------------------------------------ */
/** set functions for the following .xml administration statements.
*
* <Call name="addHandler">
* <Arg>
* <New class="org.mortbay.http.handler.HTAccessHandler">
* <Set name="Default">./etc/htaccess</Set>
* <Set name="AccessFile">.htaccess</Set>
* </New>
* </Arg>
* </Call>
*
*/
public void setDefault(String dir)
{
_default=dir;
}
/* ------------------------------------------------------------ */
public void setAccessFile(String anArg)
{
if (anArg==null)
_accessFile=".htaccess";
else
_accessFile=anArg;
}
/* ------------------------------------------------------------ */
/* ------------------------------------------------------------ */
/* ------------------------------------------------------------ */
private static class HTAccess
{
// private boolean _debug = false;
static final int ANY=0;
static final int ALL=1;
static final String USER="user";
static final String GROUP="group";
static final String VALID_USER="valid-user";
/* ------------------------------------------------------------ */
String _userFile;
Resource _userResource;
HashMap _users=null;
long _userModified;
/* ------------------------------------------------------------ */
String _groupFile;
Resource _groupResource;
HashMap _groups=null;
long _groupModified;
int _satisfy=0;
String _type;
String _name;
HashMap _methods=new HashMap();
HashSet _requireEntities=new HashSet();
String _requireName;
int _order;
ArrayList _allowList=new ArrayList();
ArrayList _denyList=new ArrayList();
long _lastModified;
boolean _forbidden=false;
/* ------------------------------------------------------------ */
public HTAccess(Resource resource)
{
BufferedReader htin=null;
try
{
htin=new BufferedReader(new InputStreamReader(resource.getInputStream()));
parse(htin);
_lastModified=resource.lastModified();
if (_userFile!=null)
{
_userResource=Resource.newResource(_userFile);
if (!_userResource.exists())
{
_forbidden=true;
log.warn("Could not find ht user file: "+_userFile);
}
else
if(log.isDebugEnabled())log.debug("user file: "+_userResource);
}
if (_groupFile!=null)
{
_groupResource=Resource.newResource(_groupFile);
if (!_groupResource.exists())
{
_forbidden=true;
log.warn("Could not find ht group file: "+_groupResource);
}
else
if(log.isDebugEnabled())log.debug("group file: "+_groupResource);
}
}
catch (IOException e)
{
_forbidden=true;
log.warn(LogSupport.EXCEPTION,e);
}
}
/* ------------------------------------------------------------ */
public boolean isForbidden()
{
return _forbidden;
}
/* ------------------------------------------------------------ */
public HashMap getMethods()
{
return _methods;
}
/* ------------------------------------------------------------ */
public long getLastModified()
{
return _lastModified;
}
/* ------------------------------------------------------------ */
public Resource getUserResource()
{
return _userResource;
}
/* ------------------------------------------------------------ */
public Resource getGroupResource()
{
return _groupResource;
}
/* ------------------------------------------------------------ */
public int getSatisfy()
{
return (_satisfy);
}
/* ------------------------------------------------------------ */
public String getName()
{
return _name;
}
/* ------------------------------------------------------------ */
public String getType()
{
return _type;
}
/* ------------------------------------------------------------ */
public boolean checkAccess(String host,String ip)
{
String elm;
boolean alp=false;
boolean dep=false;
// if no allows and no deny defined, then return true
if (_allowList.size()==0 && _denyList.size()==0)
return (true);
// looping for allows
for (int i=0;i<_allowList.size();i++)
{
elm=(String)_allowList.get(i);
if (elm.equals("all"))
{
alp=true;
break;
}
else
{
char c=elm.charAt(0);
if (c>='0' && c<='9')
{
// ip
if (ip.startsWith(elm))
{
alp=true;
break;
}
}
else
{
// hostname
if (host.endsWith(elm))
{
alp=true;
break;
}
}
}
}
// looping for denies
for (int i=0;i<_denyList.size();i++)
{
elm=(String)_denyList.get(i);
if (elm.equals("all"))
{
dep=true;
break;
}
else
{
char c=elm.charAt(0);
if (c>='0' && c<='9')
{ // ip
if (ip.startsWith(elm))
{
dep=true;
break;
}
}
else
{ // hostname
if (host.endsWith(elm))
{
dep=true;
break;
}
}
}
}
if (_order<0) //deny,allow
return !dep || alp;
//mutual failure == allow,deny
return alp && !dep;
}
/* ------------------------------------------------------------ */
public boolean checkAuth(String user,
String pass,
HttpContext context,
HttpRequest request)
{
if (_requireName==null)
return true;
// Authenticate with realm
UserRealm realm=context.getRealm();
Principal principal=realm==null?null:realm.authenticate(user,pass,request);
if (principal==null)
{
// Have to authenticate the user with the password file
String code=getUserCode(user);
String salt=code!=null?code.substring(0,2):user;
String cred=(user!=null&&pass!=null)?UnixCrypt.crypt(pass,salt):null;
if (code==null || (code.equals("") && !pass.equals("")) || !code.equals(cred))
return false;
}
if (_requireName.equalsIgnoreCase(USER))
{
if (_requireEntities.contains(user))
return true;
}
else if (_requireName.equalsIgnoreCase(GROUP))
{
ArrayList gps=getUserGroups(user);
if (gps!=null)
for (int g=gps.size();g-->0;)
if (_requireEntities.contains(gps.get(g)))
return true;
}
else if (_requireName.equalsIgnoreCase(VALID_USER))
{
return true;
}
return false;
}
/* ------------------------------------------------------------ */
public boolean isAccessLimited()
{
if (_allowList.size()>0 || _denyList.size()>0)
return true;
else
return false;
}
/* ------------------------------------------------------------ */
public boolean isAuthLimited()
{
if (_requireName!=null)
return true;
else
return false;
}
/* ------------------------------------------------------------ */
private String getUserCode(String user)
{
if (_userResource==null)
return null;
if (_users==null || _userModified!=_userResource.lastModified())
{
if(log.isDebugEnabled())log.debug("LOAD "+_userResource);
_users=new HashMap();
BufferedReader ufin=null;
try
{
ufin=new BufferedReader(new InputStreamReader(_userResource.getInputStream()));
_userModified=_userResource.lastModified();
String line;
while ((line=ufin.readLine())!=null)
{
line=line.trim();
if (line.startsWith("#")) continue;
int spos=line.indexOf(':');
if (spos<0)
continue;
String u=line.substring(0,spos).trim();
String p=line.substring(spos+1).trim();
_users.put(u,p);
}
}
catch (IOException e)
{
log.warn(LogSupport.EXCEPTION,e);
}
finally
{
try
{
if (ufin!=null) ufin.close();
}
catch (IOException e2)
{
log.warn(LogSupport.EXCEPTION,e2);
}
}
}
return (String)_users.get(user);
}
/* ------------------------------------------------------------ */
private ArrayList getUserGroups(String group)
{
if (_groupResource==null)
return null;
if (_groups==null || _groupModified!=_groupResource.lastModified())
{
if(log.isDebugEnabled())log.debug("LOAD "+_groupResource);
_groups=new HashMap();
BufferedReader ufin=null;
try
{
ufin=new BufferedReader(new InputStreamReader(_groupResource.getInputStream()));
_groupModified=_groupResource.lastModified();
String line;
while ((line=ufin.readLine())!=null)
{
line=line.trim();
if (line.startsWith("#") || line.length()==0) continue;
StringTokenizer tok=new StringTokenizer(line,": \t");
if (!tok.hasMoreTokens())
continue;
String g=tok.nextToken();
if (!tok.hasMoreTokens())
continue;
while (tok.hasMoreTokens())
{
String u=tok.nextToken();
ArrayList gl=(ArrayList)_groups.get(u);
if (gl==null)
{
gl=new ArrayList();
_groups.put(u,gl);
}
gl.add(g);
}
}
}
catch (IOException e)
{
log.warn(LogSupport.EXCEPTION,e);
}
finally
{
try
{
if (ufin!=null) ufin.close();
}
catch (IOException e2)
{
log.warn(LogSupport.EXCEPTION,e2);
}
}
}
return (ArrayList)_groups.get(group);
}
/* ------------------------------------------------------------ */
public String toString()
{
StringBuffer buf=new StringBuffer();
buf.append("AuthUserFile=");
buf.append(_userFile);
buf.append(", AuthGroupFile=");
buf.append(_groupFile);
buf.append(", AuthName=");
buf.append(_name);
buf.append(", AuthType=");
buf.append(_type);
buf.append(", Methods=");
buf.append(_methods);
buf.append(", satisfy=");
buf.append(_satisfy);
if (_order<0)
buf.append(", order=deny,allow");
else if (_order>0)
buf.append(", order=allow,deny");
else
buf.append(", order=mutual-failure");
buf.append(", Allow from=");
buf.append(_allowList);
buf.append(", deny from=");
buf.append(_denyList);
buf.append(", requireName=");
buf.append(_requireName);
buf.append(" ");
buf.append(_requireEntities);
return buf.toString();
}
/* ------------------------------------------------------------ */
private void parse(BufferedReader htin)
throws IOException
{
String line;
while ((line=htin.readLine())!=null)
{
line=line.trim();
if (line.startsWith("#"))
continue;
else if (line.startsWith("AuthUserFile"))
{
_userFile=line.substring(13).trim();
}
else if (line.startsWith("AuthGroupFile"))
{
_groupFile=line.substring(14).trim();
}
else if (line.startsWith("AuthName"))
{
_name=line.substring(8).trim();
}
else if (line.startsWith("AuthType"))
{
_type=line.substring(8).trim();
}
//else if (line.startsWith("<Limit")) {
else if (line.startsWith("<Limit"))
{
int limit=line.length();
int endp=line.indexOf('>');
StringTokenizer tkns;
if (endp<0) endp=limit;
tkns=new StringTokenizer(line.substring(6,endp));
while (tkns.hasMoreTokens())
{
_methods.put(tkns.nextToken(),Boolean.TRUE);
}
while ((line=htin.readLine())!=null)
{
line=line.trim();
if (line.startsWith("#"))
continue;
else if (line.startsWith("satisfy"))
{
int pos1=7;
limit=line.length();
while ((pos1<limit) && (line.charAt(pos1)<=' ')) pos1++;
int pos2=pos1;
while ((pos2<limit) && (line.charAt(pos2)>' ')) pos2++;
String l_string=line.substring(pos1,pos2);
if (l_string.equals("all"))
_satisfy=1;
else if (l_string.equals("any")) _satisfy=0;
}
else if (line.startsWith("require"))
{
int pos1=7;
limit=line.length();
while ((pos1<limit) && (line.charAt(pos1)<=' ')) pos1++;
int pos2=pos1;
while ((pos2<limit) && (line.charAt(pos2)>' ')) pos2++;
_requireName=line.substring(pos1,pos2).toLowerCase();
if (USER.equals(_requireName))
_requireName=USER;
else if (GROUP.equals(_requireName))
_requireName=GROUP;
else if (VALID_USER.equals(_requireName))
_requireName=VALID_USER;
pos1=pos2+1;
if (pos1<limit)
{
while ((pos1<limit) && (line.charAt(pos1)<=' ')) pos1++;
tkns=new StringTokenizer(line.substring(pos1));
while (tkns.hasMoreTokens())
{
_requireEntities.add(tkns.nextToken());
}
}
}
else if (line.startsWith("order"))
{
if(log.isDebugEnabled())log.debug("orderline="+line+"order="+_order);
if (line.indexOf("allow,deny")>0)
{
log.debug("==>allow+deny");
_order=1;
}
else if (line.indexOf("deny,allow")>0)
{
log.debug("==>deny,allow");
_order=-1;
}
else if (line.indexOf("mutual-failure")>0)
{
log.debug("==>mutual");
_order=0;
}
else
{
}
}
else if (line.startsWith("allow from"))
{
int pos1=10;
limit=line.length();
while ((pos1<limit) && (line.charAt(pos1)<=' ')) pos1++;
if(log.isDebugEnabled())log.debug("allow process:"+line.substring(pos1));
tkns=new StringTokenizer(line.substring(pos1));
while (tkns.hasMoreTokens())
{
_allowList.add(tkns.nextToken());
}
}
else if (line.startsWith("deny from"))
{
int pos1=9;
limit=line.length();
while ((pos1<limit) && (line.charAt(pos1)<=' ')) pos1++;
if(log.isDebugEnabled())log.debug("deny process:"+line.substring(pos1));
tkns=new StringTokenizer(line.substring(pos1));
while (tkns.hasMoreTokens())
{
_denyList.add(tkns.nextToken());
}
}
else if (line.startsWith("</Limit>")) break;
}
}
}
}
}
}