DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (d38398e5144e)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

'use strict';

const {
  classes: Cc,
  interfaces: Ci,
  utils: Cu,
  results: Cr
} = Components;

Cu.import('resource://gre/modules/Services.jsm');
Cu.import('resource://gre/modules/NetUtil.jsm');
Cu.import('resource://gre/modules/XPCOMUtils.jsm');

/** This little class ensures that redirects maintain an https:// origin */
function RedirectHttpsOnly() {}

RedirectHttpsOnly.prototype = {
  asyncOnChannelRedirect: function(oldChannel, newChannel, flags, callback) {
    if (newChannel.URI.scheme !== 'https') {
      callback.onRedirectVerifyCallback(Cr.NS_ERROR_ABORT);
    } else {
      callback.onRedirectVerifyCallback(Cr.NS_OK);
    }
  },

  getInterface: function(iid) {
    return this.QueryInterface(iid);
  },
  QueryInterface: XPCOMUtils.generateQI([Ci.nsIChannelEventSink])
};

/** This class loads a resource into a single string. ResourceLoader.load() is
 * the entry point. */
function ResourceLoader(res, rej) {
  this.resolve = res;
  this.reject = rej;
  this.data = '';
}

/** Loads the identified https:// URL. */
ResourceLoader.load = function(uri, doc) {
  return new Promise((resolve, reject) => {
    let listener = new ResourceLoader(resolve, reject);
    let ioChannel = NetUtil.newChannel({
      uri: uri,
      loadingNode: doc,
      securityFlags: Ci.nsILoadInfo.SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL,
      contentPolicyType: Ci.nsIContentPolicy.TYPE_INTERNAL_SCRIPT
    });

    ioChannel.loadGroup = doc.documentLoadGroup.QueryInterface(Ci.nsILoadGroup);
    ioChannel.notificationCallbacks = new RedirectHttpsOnly();
    ioChannel.asyncOpen2(listener);
  });
};

ResourceLoader.prototype = {
  onDataAvailable: function(request, context, input, offset, count) {
    let stream = Cc['@mozilla.org/scriptableinputstream;1']
      .createInstance(Ci.nsIScriptableInputStream);
    stream.init(input);
    this.data += stream.read(count);
  },

  onStartRequest: function (request, context) {},

  onStopRequest: function(request, context, status) {
    if (Components.isSuccessCode(status)) {
      var statusCode = request.QueryInterface(Ci.nsIHttpChannel).responseStatus;
      if (statusCode === 200) {
        this.resolve({ request: request, data: this.data });
      } else {
        this.reject(new Error('Non-200 response from server: ' + statusCode));
      }
    } else {
      this.reject(new Error('Load failed: ' + status));
    }
  },

  getInterface: function(iid) {
    return this.QueryInterface(iid);
  },
  QueryInterface: XPCOMUtils.generateQI([Ci.nsIStreamListener])
};

/**
 * A simple implementation of the WorkerLocation interface.
 */
function createLocationFromURI(uri) {
  return {
    href: uri.spec,
    protocol: uri.scheme + ':',
    host: uri.host + ((uri.port >= 0) ?
                      (':' + uri.port) : ''),
    port: uri.port,
    hostname: uri.host,
    pathname: uri.path.replace(/[#\?].*/, ''),
    search: uri.path.replace(/^[^\?]*/, '').replace(/#.*/, ''),
    hash: uri.hasRef ? ('#' + uri.ref) : '',
    origin: uri.prePath,
    toString: function() {
      return uri.spec;
    }
  };
}

/**
 * A javascript sandbox for running an IdP.
 *
 * @param domain (string) the domain of the IdP
 * @param protocol (string?) the protocol of the IdP [default: 'default']
 * @param win (obj) the current window
 * @throws if the domain or protocol aren't valid
 */
function IdpSandbox(domain, protocol, win) {
  this.source = IdpSandbox.createIdpUri(domain, protocol || "default");
  this.active = null;
  this.sandbox = null;
  this.window = win;
}

IdpSandbox.checkDomain = function(domain) {
  if (!domain || typeof domain !== 'string') {
    throw new Error('Invalid domain for identity provider: ' +
                    'must be a non-zero length string');
  }
};

/**
 * Checks that the IdP protocol is superficially sane.  In particular, we don't
 * want someone adding relative paths (e.g., '../../myuri'), which could be used
 * to move outside of /.well-known/ and into space that they control.
 */
IdpSandbox.checkProtocol = function(protocol) {
  let message = 'Invalid protocol for identity provider: ';
  if (!protocol || typeof protocol !== 'string') {
    throw new Error(message + 'must be a non-zero length string');
  }
  if (decodeURIComponent(protocol).match(/[\/\\]/)) {
    throw new Error(message + "must not include '/' or '\\'");
  }
};

/**
 * Turns a domain and protocol into a URI.  This does some aggressive checking
 * to make sure that we aren't being fooled somehow.  Throws on fooling.
 */
IdpSandbox.createIdpUri = function(domain, protocol) {
  IdpSandbox.checkDomain(domain);
  IdpSandbox.checkProtocol(protocol);

  let message = 'Invalid IdP parameters: ';
  try {
    let wkIdp = 'https://' + domain + '/.well-known/idp-proxy/' + protocol;
    let ioService = Components.classes['@mozilla.org/network/io-service;1']
                    .getService(Ci.nsIIOService);
    let uri = ioService.newURI(wkIdp);

    if (uri.hostPort !== domain) {
      throw new Error(message + 'domain is invalid');
    }
    if (uri.path.indexOf('/.well-known/idp-proxy/') !== 0) {
      throw new Error(message + 'must produce a /.well-known/idp-proxy/ URI');
    }

    return uri;
  } catch (e if (typeof e.result !== 'undefined' &&
                 e.result === Cr.NS_ERROR_MALFORMED_URI)) {
    throw new Error(message + 'must produce a valid URI');
  }
};

IdpSandbox.prototype = {
  isSame: function(domain, protocol) {
    return this.source.spec === IdpSandbox.createIdpUri(domain, protocol).spec;
  },

  start: function() {
    if (!this.active) {
      this.active = ResourceLoader.load(this.source, this.window.document)
        .then(result => this._createSandbox(result));
    }
    return this.active;
  },

  // Provides the sandbox with some useful facilities.  Initially, this is only
  // a minimal set; it is far easier to add more as the need arises, than to
  // take them back if we discover a mistake.
  _populateSandbox: function(uri) {
    this.sandbox.location = Cu.cloneInto(createLocationFromURI(uri),
                                         this.sandbox,
                                         { cloneFunctions: true });
  },

  _createSandbox: function(result) {
    let principal = Services.scriptSecurityManager
      .getChannelResultPrincipal(result.request);

    this.sandbox = Cu.Sandbox(principal, {
      sandboxName: 'IdP-' + this.source.host,
      wantComponents: false,
      wantExportHelpers: false,
      wantGlobalProperties: [
        'indexedDB', 'XMLHttpRequest', 'TextEncoder', 'TextDecoder',
        'URL', 'URLSearchParams', 'atob', 'btoa', 'Blob', 'crypto',
        'rtcIdentityProvider', 'fetch'
      ]
    });
    let registrar = this.sandbox.rtcIdentityProvider;
    if (!Cu.isXrayWrapper(registrar)) {
      throw new Error('IdP setup failed');
    }

    // have to use the ultimate URI, not the starting one to avoid
    // that origin stealing from the one that redirected to it
    this._populateSandbox(result.request.URI);
    try {
      Cu.evalInSandbox(result.data, this.sandbox,
                       'latest', result.request.URI.spec, 1);
    } catch (e) {
      // These can be passed straight on, because they are explicitly labelled
      // as being IdP errors by the IdP and we drop line numbers as a result.
      if (e.name === 'IdpError' || e.name === 'IdpLoginError') {
        throw e;
      }
      this._logError(e);
      throw new Error('Error in IdP, check console for details');
    }

    if (!registrar.hasIdp) {
      throw new Error('IdP failed to call rtcIdentityProvider.register()');
    }
    return registrar;
  },

  // Capture all the details from the error and log them to the console.  This
  // can't rethrow anything else because that could leak information about the
  // internal workings of the IdP across origins.
  _logError: function(e) {
    let winID = this.window.QueryInterface(Ci.nsIInterfaceRequestor)
        .getInterface(Ci.nsIDOMWindowUtils).currentInnerWindowID;
    let scriptError = Cc["@mozilla.org/scripterror;1"]
        .createInstance(Ci.nsIScriptError);
    scriptError.initWithWindowID(e.message, e.fileName, null,
                                 e.lineNumber, e.columnNumber,
                                 Ci.nsIScriptError.errorFlag,
                                 "content javascript", winID);
    let consoleService = Cc['@mozilla.org/consoleservice;1']
        .getService(Ci.nsIConsoleService);
    consoleService.logMessage(scriptError);
  },

  stop: function() {
    if (this.sandbox) {
      Cu.nukeSandbox(this.sandbox);
    }
    this.sandbox = null;
    this.active = null;
  },

  toString: function() {
    return this.source.spec;
  }
};

this.EXPORTED_SYMBOLS = ['IdpSandbox'];
this.IdpSandbox = IdpSandbox;