main/modules/sbapi/sandbox.js

   1 /*
   2  * Portions copyright 2004-2007 Aaron Boodman
   3  * Copyright 2015 Ketmar Dark <ketmar@ketmar.no-ip.org>
   4  * Contributors: See contributors list in install.rdf and CREDITS
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * Note that this license applies only to the Greasemonkey extension source
  14  * files, not to the user scripts which it runs. User scripts are licensed
  15  * separately by their authors.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  23  * SOFTWARE.
  24  *
  25  * The above copyright notice and this permission notice shall be included in all
  26  * copies or substantial portions of the Software.
  27  */
  28 ////////////////////////////////////////////////////////////////////////////////
  29 let {GuerillaXmlHttpReqester} = require("sbapi/xmlhttprequest");
  30 let {ScriptStorage} = require("sbapi/scriptstorage");
  31 let {openTab} = require("sbapi/opentab");
  32
  33
  34 ////////////////////////////////////////////////////////////////////////////////
  35 function fileReadBinary (fl) {
  36   let istream = Cc["@mozilla.org/network/file-input-stream;1"].createInstance(Ci.nsIFileInputStream);
  37   istream.init(fl, -1, -1, false);
  38   let bstream = Cc["@mozilla.org/binaryinputstream;1"].createInstance(Ci.nsIBinaryInputStream);
  39   bstream.setInputStream(istream);
  40   let bytes = bstream.readBytes(bstream.available());
  41   bstream.close();
  42   return bytes;
  43 }
  44
  45
  46 ////////////////////////////////////////////////////////////////////////////////
  47 let ioSvc = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService);
  48
  49 function uriFromUrl (url, base) {
  50   let baseUri = null;
  51   if (typeof(base) === "string") {
  52     baseUri = uriFromUrl(base);
  53   } else if (base) {
  54     baseUri = base;
  55   }
  56   try {
  57     return ioSvc.newURI(url, null, baseUri);
  58   } catch (e) {
  59     return null;
  60   }
  61 }
  62
  63
  64 ////////////////////////////////////////////////////////////////////////////////
  65 // string aString: A string of data to be hashed.
  66 // string aAlg: optional; the hash algorithm to be used; possible values are: MD2, MD5, SHA1, SHA256, SHA384, and SHA512; defaults to SHA1
  67 // string aCharset: optional; the charset used by the passed string; defaults to UTF-8
  68 function cryptoHashStr (aString, aAlg, aCharset) {
  69   const PR_UINT32_MAX = 0xffffffff; // this tells updateFromStream to read the entire string
  70
  71   let str = ""+aString;
  72   let alg = (""+(aAlg||"SHA1")).trim().toUpperCase();
  73   let charset = (""+(aCharset||"UTF-8")).trim();
  74
  75   let chashObj = Cc["@mozilla.org/security/hash;1"].createInstance(Ci.nsICryptoHash);
  76
  77   try {
  78     chashObj.initWithString(alg);
  79   } catch (e) {
  80     logError("invalid hash algorithm: '"+aAlg+"'");
  81     throw new Error("invalid hash algorithm: '"+aAlg+"'");
  82   }
  83
  84   let uniconvObj = Cc["@mozilla.org/intl/scriptableunicodeconverter"].createInstance(Ci.nsIScriptableUnicodeConverter);
  85   try {
  86     uniconvObj.charset = charset;
  87   } catch (e) {
  88     logError("invalid charset: '"+aCharset+"'");
  89     throw new Error("invalid charset: '"+aCharset+"'");
  90   }
  91
  92   if (str) chashObj.updateFromStream(uniconvObj.convertToInputStream(str), PR_UINT32_MAX);
  93   let hash = chashObj.finish(false); // hash as raw octets
  94   return [("0"+hash.charCodeAt(i).toString(16)).slice(-2) for (i in hash)].join("");
  95 }
  96
  97
  98 ////////////////////////////////////////////////////////////////////////////////
  99 function safeHTMLParser (domWin, htmlstr, baseUrl) {
 100   //conlog("domWin: "+domWin);
 101   //conlog("htmlstr: "+htmlstr);
 102   //conlog("baseUrl: "+baseUrl);
 103   let doc = domWin.document.implementation.createDocument("", "", domWin.document.implementation.createDocumentType("html", "", ""));
 104   doc.appendChild(doc.createElement("html"));
 105   doc.documentElement.appendChild(doc.createElement("body"));
 106
 107   let baseUri = null, frag;
 108   if (typeof(baseUrl) !== "undefined") baseUri = uriFromUrl(baseUrl);
 109
 110   let pu = Cc["@mozilla.org/parserutils;1"].createInstance(Ci.nsIParserUtils);
 111   if (!pu) { logError("FUCKED!"); return null; }
 112
 113   frag = pu.parseFragment(htmlstr, 0, false, baseUri, doc.body);
 114   doc.adoptNode(frag);
 115   doc.body.appendChild(frag);
 116   return doc;
 117 }
 118
 119
 120 ////////////////////////////////////////////////////////////////////////////////
 121 function genUUID () {
 122   let uuidgen = Cc["@mozilla.org/uuid-generator;1"].createInstance(Ci.nsIUUIDGenerator);
 123   if (!uuidgen) throw new Error("no UUID generator available!");
 124   return uuidgen.generateUUID().toString();
 125 }
 126
 127
 128 ////////////////////////////////////////////////////////////////////////////////
 129 let storageObjects = {};
 130
 131
 132 function getStorageObject (nfo) {
 133   if (nfo.name in storageObjects) {
 134     return storageObjects[nfo.name];
 135   } else {
 136     let res = new ScriptStorage(nfo);
 137     storageObjects[nfo.name] = res;
 138     return res;
 139   }
 140 }
 141
 142
 143 exports.closeStorageObjects = function () {
 144   for (let k in storageObjects) {
 145     if (typeof(k) != "string") continue;
 146     let dbo = storageObjects[k];
 147     //if (typeof(dbo) != "object") continue;
 148     if (dbo.opened) {
 149       debuglog("freeing storage object for '", k, "'");
 150       dbo.close();
 151     }
 152   }
 153   storageObjects = {};
 154 };
 155
 156
 157 ////////////////////////////////////////////////////////////////////////////////
 158 exports.createSandbox = function (domWin, nfo, url) {
 159   let sandbox;
 160   let scres = nfo.resources;
 161
 162   if (nfo.unwrapped) {
 163     // create "unwrapped" sandbox
 164     sandbox = Cu.Sandbox(domWin, {
 165       sandboxName: "unwrapped",
 166       sandboxPrototype: domWin/*.wrappedJSObject*/,
 167       wantXrays: false,
 168     });
 169     // alias unsafeWindow for compatibility
 170     Cu.evalInSandbox("const unsafeWindow = window;", sandbox);
 171   } else {
 172     // create "real" sandbox
 173     sandbox = Cu.Sandbox(domWin, {
 174       sandboxName: nfo.name,
 175       sandboxPrototype: domWin/*.wrappedJSObject*/,
 176       wantXrays: true,
 177     });
 178
 179     // Note that because waivers aren't propagated between origins, we need the
 180     // unsafeWindow getter to live in the sandbox.  See http://bugzil.la/1043958
 181     let unsafeWindowGetter = new sandbox.Function("return (window.wrappedJSObject||window);");
 182     Object.defineProperty(sandbox, "unsafeWindow", {get: unsafeWindowGetter});
 183
 184     sandbox.GM_generateUUID = tieto(null, genUUID);
 185     sandbox.GM_cryptoHash = tieto(null, cryptoHashStr);
 186
 187     //Object.defineProperty(sandbox, "GM_safeHTMLParser", {get: function () tieto(null, safeHTMLParser, domWin)});
 188     sandbox.GM_safeHTMLParser = tieto(null, safeHTMLParser, domWin);
 189
 190     let scriptStorage = getStorageObject(nfo);
 191     sandbox.GM_getValue = tieto(scriptStorage, "getValue");
 192     sandbox.GM_setValue = tieto(scriptStorage, "setValue");
 193     sandbox.GM_deleteValue = tieto(scriptStorage, "deleteValue");
 194     sandbox.GM_listValues = tieto(scriptStorage, "listValues");
 195
 196     sandbox.GM_xmlhttpRequest = tieto(new GuerillaXmlHttpReqester(domWin, url, sandbox), "contentStartRequest");
 197
 198     sandbox.GM_addStyle = tieto(null, function (doc, cssstr) {
 199       var head = doc.getElementsByTagName("head")[0];
 200       if (head) {
 201         var style = doc.createElement("style");
 202         style.textContent = cssstr;
 203         style.type = "text/css";
 204         head.appendChild(style);
 205         return style;
 206       }
 207       return null;
 208     }, domWin.document);
 209
 210     sandbox.GM_openInTab = tieto(null, openTab, domWin);
 211
 212     sandbox.GM_getResourceText = tieto(null, function (name) {
 213       if (typeof(name) === "undefined") throw new Error("GM_getResourceText(): no name given!");
 214       name = ""+name;
 215       let rsrc = scres[name];
 216       if (!rsrc) throw new Error("GM_getResourceText(): no resource found: '"+name+"'");
 217       return fileReadText(rsrc.file);
 218     });
 219
 220     sandbox.GM_getResourceURL = tieto(null, function (name) {
 221       //logError("GM_getResourceURL(): stub!");
 222       //throw new Error("GM_getResourceURL() not implemented");
 223       if (typeof(name) === "undefined") throw new Error("GM_getResourceText(): no name given!");
 224       name = ""+name;
 225       let rsrc = scres[name];
 226       if (!rsrc) throw new Error("GM_getResourceText(): no resource found: '"+name+"'");
 227       let rawdata = fileReadBinary(rsrc.file);
 228       return "data:"+rsrc.contenttype+";base64,"+encodeURIComponent(btoa(rawdata));
 229     });
 230
 231     // stubs
 232     sandbox.GM_registerMenuCommand = tieto(null, function () { logError("GM_registerMenuCommand(): stub!"); });
 233     sandbox.GM_setClipboard = tieto(null, function () { logError("GM_setClipboard(): stub!"); });
 234   }
 235
 236   // provide log functions for both wrapped and unwrapped scripts
 237   if (!nfo.unwrapped || nfo.wantlog) {
 238     sandbox.conlog = tieto(null, conlog);
 239     sandbox.logError = tieto(null, logError);
 240     if (!nfo.unwrapped) sandbox.GM_log = tieto(null, conlog);
 241   }
 242
 243   Object.defineProperty(sandbox, "GM_info", {
 244     get: tieto(null, function () { logError("GM_info(): stub!"); return {}; }),
 245   });
 246
 247   return sandbox;
 248 }
 249
 250
 251 exports.runInSandbox = function (sandbox, nfo) {
 252   // eval the code, with anonymous wrappers when/if appropriate
 253   function evalLazyWrap (code, fileName) {
 254     try {
 255       Cu.evalInSandbox(code, sandbox, "ECMAv5", fileName, 1);
 256     } catch (e) {
 257       if ("return not in function" == e.message) {
 258         // we never anon wrap unless forced to by a "return not in a function" error
 259         logError("please, do not use `return` in top-level code in "+fileName+":"+e.lineNumber);
 260         Cu.evalInSandbox("(function(){ "+code+"\n})()", sandbox, "ECMAv5", fileName, 1);
 261       } else {
 262         // otherwise raise
 263         throw e;
 264       }
 265     }
 266   }
 267
 268   // eval the code, with a try/catch to report errors cleanly
 269   function evalNoThrow (code, fileName) {
 270     try {
 271       evalLazyWrap(code, fileName);
 272     } catch (e) {
 273       logException("UJS", e);
 274       return false;
 275     }
 276     return true;
 277   }
 278
 279   try {
 280     // eval libraries
 281     for (let fl of nfo.libs) {
 282       if (!fl.exists() || fl.isDirectory() || !fl.isReadable()) return;
 283       let text = fileReadText(fl);
 284       //conlog("*** lib: ", fl.path);
 285       if (!evalNoThrow(text, "libs/"+fl.name+".js")) return;
 286     }
 287     // eval includes
 288     for (let fl of nfo.incs) {
 289       if (!fl.exists() || fl.isDirectory() || !fl.isReadable()) return;
 290       let text = fileReadText(fl);
 291       //conlog("*** inc: ", fl.path);
 292       if (!evalNoThrow(text, nfo.name+"/"+fl.name+".js")) return;
 293     }
 294     // eval main script
 295     {
 296       if (!nfo.file.exists() || nfo.file.isDirectory() || !nfo.file.isReadable()) return;
 297       let text = fileReadText(nfo.file);
 298       //conlog("*** main: ", nfo.file.path);
 299       evalNoThrow(text, nfo.name+".js");
 300     }
 301   } catch (e) {
 302     logException("XUJS", e);
 303   }
 304 };