src/auth/Acl.cc

   1 /*
   2  * Copyright (C) 1996-2014 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #include "squid.h"
  10 #include "acl/Acl.h"
  11 #include "acl/FilledChecklist.h"
  12 #include "auth/Acl.h"
  13 #include "auth/AclProxyAuth.h"
  14 #include "auth/UserRequest.h"
  15 #include "client_side.h"
  16 #include "HttpRequest.h"
  17
  18 /**
  19  * \retval ACCESS_AUTH_REQUIRED credentials missing. challenge required.
  20  * \retval ACCESS_DENIED        user not authenticated (authentication error?)
  21  * \retval ACCESS_DUNNO         user authentication is in progress
  22  * \retval ACCESS_DENIED        user not authorized
  23  * \retval ACCESS_ALLOWED       user authenticated and authorized
  24  */
  25 allow_t
  26 AuthenticateAcl(ACLChecklist *ch)
  27 {
  28     ACLFilledChecklist *checklist = Filled(ch);
  29     HttpRequest *request = checklist->request;
  30     http_hdr_type headertype;
  31
  32     if (NULL == request) {
  33         fatal ("requiresRequest SHOULD have been true for this ACL!!");
  34         return ACCESS_DENIED;
  35     } else if (request->flags.sslBumped) {
  36         debugs(28, 5, "SslBumped request: It is an encapsulated request do not authenticate");
  37         checklist->auth_user_request = checklist->conn() != NULL ? checklist->conn()->getAuth() : request->auth_user_request;
  38         if (checklist->auth_user_request != NULL)
  39             return ACCESS_ALLOWED;
  40         else
  41             return ACCESS_DENIED;
  42     } else if (request->flags.accelerated) {
  43         /* WWW authorization on accelerated requests */
  44         headertype = HDR_AUTHORIZATION;
  45     } else if (request->flags.intercepted || request->flags.interceptTproxy) {
  46         debugs(28, DBG_IMPORTANT, "NOTICE: Authentication not applicable on intercepted requests.");
  47         return ACCESS_DENIED;
  48     } else {
  49         /* Proxy authorization on proxy requests */
  50         headertype = HDR_PROXY_AUTHORIZATION;
  51     }
  52
  53     /* get authed here */
  54     /* Note: this fills in auth_user_request when applicable */
  55     const AuthAclState result = Auth::UserRequest::tryToAuthenticateAndSetAuthUser(
  56                                     &checklist->auth_user_request, headertype, request,
  57                                     checklist->conn(), checklist->src_addr, checklist->al);
  58     switch (result) {
  59
  60     case AUTH_ACL_CANNOT_AUTHENTICATE:
  61         debugs(28, 4, HERE << "returning " << ACCESS_DENIED << " user authenticated but not authorised.");
  62         return ACCESS_DENIED;
  63
  64     case AUTH_AUTHENTICATED:
  65         return ACCESS_ALLOWED;
  66         break;
  67
  68     case AUTH_ACL_HELPER:
  69         if (checklist->goAsync(ProxyAuthLookup::Instance()))
  70             debugs(28, 4, "returning " << ACCESS_DUNNO << " sending credentials to helper.");
  71         else
  72             debugs(28, 2, "cannot go async; returning " << ACCESS_DUNNO);
  73         return ACCESS_DUNNO; // XXX: break this down into DUNNO, EXPIRED_OK, EXPIRED_BAD states
  74
  75     case AUTH_ACL_CHALLENGE:
  76         debugs(28, 4, HERE << "returning " << ACCESS_AUTH_REQUIRED << " sending authentication challenge.");
  77         /* Client is required to resend the request with correct authentication
  78          * credentials. (This may be part of a stateful auth protocol.)
  79          * The request is denied.
  80          */
  81         return ACCESS_AUTH_REQUIRED;
  82
  83     default:
  84         fatal("unexpected authenticateAuthenticate reply\n");
  85         return ACCESS_DENIED;
  86     }
  87 }