| 1 | // Copyright 2004-2007 Jean-Francois Poilpret |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package net.sourceforge.hivelock; |
| 16 | |
| 17 | import java.lang.reflect.InvocationHandler; |
| 18 | import java.lang.reflect.InvocationTargetException; |
| 19 | import java.lang.reflect.Method; |
| 20 | import java.lang.reflect.Proxy; |
| 21 | import java.security.Principal; |
| 22 | import java.util.Iterator; |
| 23 | import java.util.List; |
| 24 | |
| 25 | import org.apache.commons.logging.Log; |
| 26 | |
| 27 | import org.apache.hivemind.InterceptorStack; |
| 28 | import org.apache.hivemind.ServiceInterceptorFactory; |
| 29 | import org.apache.hivemind.internal.Module; |
| 30 | import org.apache.hivemind.methodmatch.MethodMatcher; |
| 31 | import org.apache.hivemind.service.MethodSignature; |
| 32 | |
| 33 | import net.sourceforge.hiveutils.collections.SetOperations; |
| 34 | |
| 35 | public class AuthorizationInterceptorFactory implements ServiceInterceptorFactory |
| 36 | { |
| 37 | public AuthorizationInterceptorFactory( SecurityService security, |
| 38 | PrincipalHelperService helper) |
| 39 | { |
| 40 | _security = security; |
| 41 | _helper = helper; |
| 42 | } |
| 43 | |
| 44 | public void createInterceptor( InterceptorStack stack, |
| 45 | Module invokingMod, |
| 46 | List parameters) |
| 47 | { |
| 48 | stack.push(Proxy.newProxyInstance( |
| 49 | invokingMod.getClassResolver().getClassLoader(), |
| 50 | new Class[] {stack.getServiceInterface()}, |
| 51 | new Interceptor(stack.getServiceLog(), |
| 52 | stack.peek(), |
| 53 | parameters))); |
| 54 | } |
| 55 | |
| 56 | private class Interceptor implements InvocationHandler |
| 57 | { |
| 58 | public Interceptor(Log logger, Object target, List parameters) |
| 59 | { |
| 60 | _logger = logger; |
| 61 | _target = target; |
| 62 | // Create method matcher for finding roles that can call a method |
| 63 | _methodMatcher = new MethodMatcher(); |
| 64 | AuthorizationContribution authorization; |
| 65 | Iterator i = parameters.iterator(); |
| 66 | while (i.hasNext()) |
| 67 | { |
| 68 | Object next = i.next(); |
| 69 | if (next instanceof AuthorizationContribution) |
| 70 | { |
| 71 | authorization = (AuthorizationContribution) next; |
| 72 | _methodMatcher.put( authorization.getPattern(), |
| 73 | authorization.getRoles()); |
| 74 | } |
| 75 | } |
| 76 | // Add default behavior: no role at all can access the method! |
| 77 | _methodMatcher.put( "*", EMPTY_ROLES); |
| 78 | } |
| 79 | |
| 80 | //CSOFF: IllegalThrowsCheck |
| 81 | public Object invoke(Object proxy, Method method, Object[] args) |
| 82 | throws Throwable |
| 83 | { |
| 84 | // Check user's credentials |
| 85 | checkAuthorization(method); |
| 86 | |
| 87 | try |
| 88 | { |
| 89 | return method.invoke(_target, args); |
| 90 | } |
| 91 | catch (InvocationTargetException e) |
| 92 | { |
| 93 | throw e.getTargetException(); |
| 94 | } |
| 95 | } |
| 96 | //CSON: IllegalThrowsCheck |
| 97 | |
| 98 | private void checkAuthorization(Method method) |
| 99 | { |
| 100 | MethodSignature signature = new MethodSignature(method); |
| 101 | String[] roles = (String[]) _methodMatcher.get(signature); |
| 102 | |
| 103 | // roles == null means everybody is allowed |
| 104 | if (roles == null) |
| 105 | { |
| 106 | return; |
| 107 | } |
| 108 | if (roles.length == 0) |
| 109 | { |
| 110 | _logger.warn("Method " + getMethodName(method) + " is forbidden for anybody"); |
| 111 | throw new SecurityException("Method " + getMethodName(method) + |
| 112 | " is forbidden for anybody"); |
| 113 | } |
| 114 | Principal principal = _security.getCurrentUser(); |
| 115 | // Check if both sets of roles intersect |
| 116 | if (principal == null) |
| 117 | { |
| 118 | _logger.warn("Unregistered user cannot access method " + getMethodName(method)); |
| 119 | throw new SecurityException("Unregistered user cannot access method " + |
| 120 | getMethodName(method)); |
| 121 | } |
| 122 | if (!SetOperations.intersects(roles, _helper.getRoles(principal))) |
| 123 | { |
| 124 | _logger.warn( principal.getName() + |
| 125 | " is not assigned role to access method " + |
| 126 | getMethodName(method)); |
| 127 | throw new SecurityException(principal.getName() + |
| 128 | " is not assigned role to access method " + |
| 129 | getMethodName(method)); |
| 130 | } |
| 131 | } |
| 132 | |
| 133 | private String getMethodName(Method method) |
| 134 | { |
| 135 | return method.getDeclaringClass().getName() + "." + method.getName(); |
| 136 | } |
| 137 | |
| 138 | private final Log _logger; |
| 139 | private final Object _target; |
| 140 | private final MethodMatcher _methodMatcher; |
| 141 | } |
| 142 | |
| 143 | private final SecurityService _security; |
| 144 | private final PrincipalHelperService _helper; |
| 145 | static private final String[] EMPTY_ROLES = {}; |
| 146 | } |