63027: Adding evalInSandbox to JS component loader script-context, to permit
JS components to execute script code with restricted privileges and
controlled access to their (privileged) environment. r=brendan,
sr=jband.
This commit is contained in:
shaver%mozilla.org
Родитель
181ee38b92
Коммит
1fe0824c25
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@ -49,6 +49,7 @@
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#ifndef XPCONNECT_STANDALONE
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#include "nsIScriptSecurityManager.h"
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#include "nsIScriptObjectOwner.h"
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#include "nsIURL.h"
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#endif
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#ifndef NO_SUBSCRIPT_LOADER
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#include "mozJSSubScriptLoader.h"
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@ -84,8 +85,65 @@ const char kScriptErrorContractID[] = "@mozilla.org/scripterror;1";
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const char kObserverServiceContractID[] = NS_OBSERVERSERVICE_CONTRACTID;
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#ifndef XPCONNECT_STANDALONE
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const char kScriptSecurityManagerContractID[] = NS_SCRIPTSECURITYMANAGER_CONTRACTID;
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const char kStandardURLContractID[] = "@mozilla.org/network/standard-url;1";
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#endif
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JS_STATIC_DLL_CALLBACK(void)
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Reporter(JSContext *cx, const char *message, JSErrorReport *rep)
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{
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nsresult rv;
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/* Use the console service to register the error. */
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nsCOMPtr<nsIConsoleService> consoleService =
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do_GetService(kConsoleServiceContractID);
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/*
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* Make an nsIScriptError, populate it with information from this
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* error, then log it with the console service. The UI can then
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* poll the service to update the JavaScript console.
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*/
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nsCOMPtr<nsIScriptError> errorObject =
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do_CreateInstance(kScriptErrorContractID);
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if (consoleService && errorObject) {
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/*
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* Got an error object; prepare appropriate-width versions of
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* various arguments to it.
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*/
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nsAutoString fileUni;
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fileUni.AssignWithConversion(rep->filename);
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PRUint32 column = rep->uctokenptr - rep->uclinebuf;
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rv = errorObject->Init(NS_REINTERPRET_CAST(const PRUnichar*,
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rep->ucmessage),
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fileUni.get(),
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NS_REINTERPRET_CAST(const PRUnichar*,
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rep->uclinebuf),
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rep->lineno, column, rep->flags,
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"component javascript");
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if (NS_SUCCEEDED(rv)) {
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rv = consoleService->LogMessage(errorObject);
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if (NS_SUCCEEDED(rv)) {
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// We're done! Skip return to fall thru to stderr
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// printout, for the benefit of those invoking the
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// browser with -console
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// return;
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}
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}
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}
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/*
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* If any of the above fails for some reason, fall back to
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* printing to stderr.
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*/
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fprintf(stderr, "JS Component Loader: %s %s:%d\n"
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" %s\n",
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JSREPORT_IS_WARNING(rep->flags) ? "WARNING" : "ERROR",
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rep->filename, rep->lineno,
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message ? message : "<no message>");
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}
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JS_STATIC_DLL_CALLBACK(JSBool)
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Dump(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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@ -120,9 +178,141 @@ Debug(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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#endif
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}
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#ifndef XPCONNECT_STANDALONE
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static JSFunctionSpec gSandboxFun[] = {
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{"dump", Dump, 1 },
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{"debug", Debug, 1 },
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{0}
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};
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static JSBool
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sandbox_enumerate(JSContext *cx, JSObject *obj)
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{
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return JS_EnumerateStandardClasses(cx, obj);
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}
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static JSBool
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sandbox_resolve(JSContext *cx, JSObject *obj, jsval id)
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{
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JSBool resolved;
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return JS_ResolveStandardClass(cx, obj, id, &resolved);
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}
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static JSClass js_SandboxClass = {
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"Sandbox", 0,
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JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub,
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sandbox_enumerate, sandbox_resolve, JS_ConvertStub, JS_FinalizeStub,
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JSCLASS_NO_OPTIONAL_MEMBERS
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};
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JS_STATIC_DLL_CALLBACK(JSBool)
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NewSandbox(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
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{
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nsresult rv;
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nsCOMPtr<nsIXPConnect> xpc = do_GetService(kXPConnectServiceContractID,
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&rv);
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if (!xpc) {
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JS_ReportError(cx, "Unable to get XPConnect service: %08lx", rv);
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return JS_FALSE;
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}
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/*
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* We're not likely to see much action on this context, so keep stack-arena
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* chunk size small to reduce bloat.
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*/
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JSContext *sandcx = JS_NewContext(JS_GetRuntime(cx), 1024);
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if (!sandcx) {
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JS_ReportOutOfMemory(cx);
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return JS_FALSE;
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}
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JSBool ok = JS_FALSE;
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JSObject *sandbox = JS_NewObject(sandcx, &js_SandboxClass, nsnull, nsnull);
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if (!sandbox)
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goto out;
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JS_SetGlobalObject(sandcx, sandbox);
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ok = JS_DefineFunctions(sandcx, sandbox, gSandboxFun) &&
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NS_SUCCEEDED(xpc->InitClasses(sandcx, sandbox));
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*rval = OBJECT_TO_JSVAL(sandbox);
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out:
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JS_DestroyContext(sandcx);
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return ok;
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}
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JS_STATIC_DLL_CALLBACK(JSBool)
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EvalInSandbox(JSContext *cx, JSObject *obj, uintN argc, jsval *argv,
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jsval *rval)
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{
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JSPrincipals* jsPrincipals;
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JSString* source;
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const jschar * URL;
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JSObject* sandbox;
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if (!JS_ConvertArguments(cx, argc, argv, "SoW", &source, &sandbox, &URL))
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return JS_FALSE;
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if (!JS_InstanceOf(cx, sandbox, &js_SandboxClass, NULL)) {
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JSClass *clasp = JS_GetClass(cx, sandbox);
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const char *className = clasp ? clasp->name : "<unknown!>";
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JS_ReportError(cx,
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"evalInSandbox passed object of class %s instead of Sandbox", className);
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return JS_FALSE;
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}
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NS_ConvertUCS2toUTF8 URL8((const PRUnichar *)URL);
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nsCOMPtr<nsIURL> iURL;
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nsCOMPtr<nsIStandardURL> stdUrl =
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do_CreateInstance(kStandardURLContractID);
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if (!stdUrl ||
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NS_FAILED(stdUrl->Init(nsIStandardURL::URLTYPE_STANDARD, 80,
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URL8.get(), nsnull)) ||
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!(iURL = do_QueryInterface(stdUrl))) {
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JS_ReportError(cx, "Can't create URL for evalInSandbox");
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return JS_FALSE;
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}
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nsCOMPtr<nsIPrincipal> principal;
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nsCOMPtr<nsIScriptSecurityManager> secman =
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do_GetService(kScriptSecurityManagerContractID);
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if (!secman ||
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NS_FAILED(secman->GetCodebasePrincipal(iURL,
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getter_AddRefs(principal))) ||
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!principal ||
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NS_FAILED(principal->GetJSPrincipals(&jsPrincipals)) ||
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!jsPrincipals) {
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JS_ReportError(cx, "Can't get principals for evalInSandbox");
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return JS_FALSE;
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}
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JSContext *sandcx = JS_NewContext(JS_GetRuntime(cx), 8192);
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if (!sandcx) {
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JS_ReportError(cx, "Can't prepare context for evalInSandbox");
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return JS_FALSE;
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}
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JS_SetGlobalObject(sandcx, sandbox);
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JS_SetErrorReporter(sandcx, Reporter);
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JSBool ok = JS_EvaluateUCScriptForPrincipals(sandcx, sandbox, jsPrincipals,
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JS_GetStringChars(source),
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JS_GetStringLength(source),
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URL8.get(), 1, rval);
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JS_DestroyContext(sandcx);
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return ok;
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}
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#endif /* XPCONNECT_STANDALONE */
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static JSFunctionSpec gGlobalFun[] = {
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{"dump", Dump, 1 },
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{"debug", Debug, 1 },
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#ifndef XPCONNECT_STANDALONE
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{"Sandbox", NewSandbox, 0 },
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{"evalInSandbox", EvalInSandbox, 3 },
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#endif
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{0}
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};
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@ -275,61 +465,6 @@ mozJSComponentLoader::GetFactory(const nsIID &aCID,
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return rv;
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}
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JS_STATIC_DLL_CALLBACK(void)
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Reporter(JSContext *cx, const char *message, JSErrorReport *rep)
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{
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nsresult rv;
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/* Use the console service to register the error. */
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nsCOMPtr<nsIConsoleService> consoleService =
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do_GetService(kConsoleServiceContractID);
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/*
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* Make an nsIScriptError, populate it with information from this
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* error, then log it with the console service. The UI can then
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* poll the service to update the JavaScript console.
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*/
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nsCOMPtr<nsIScriptError> errorObject =
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do_CreateInstance(kScriptErrorContractID);
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if (consoleService != nsnull && errorObject != nsnull) {
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/*
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* Got an error object; prepare appropriate-width versions of
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* various arguments to it.
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*/
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nsAutoString fileUni;
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fileUni.AssignWithConversion(rep->filename);
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const PRUnichar *newFileUni = fileUni.ToNewUnicode();
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PRUint32 column = rep->uctokenptr - rep->uclinebuf;
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rv = errorObject->Init(NS_REINTERPRET_CAST(const PRUnichar*, rep->ucmessage), newFileUni, NS_REINTERPRET_CAST(const PRUnichar*, rep->uclinebuf),
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rep->lineno, column, rep->flags,
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"component javascript");
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nsMemory::Free((void *)newFileUni);
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if (NS_SUCCEEDED(rv)) {
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rv = consoleService->LogMessage(errorObject);
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if (NS_SUCCEEDED(rv)) {
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// We're done! Skip return to fall thru to stderr
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// printout, for the benefit of those invoking the
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// browser with -console.
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// return;
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}
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}
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}
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/*
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* If any of the above fails for some reason, fall back to
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* printing to stderr.
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*/
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fprintf(stderr, "JS Component Loader: %s %s:%d\n"
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" %s\n",
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JSREPORT_IS_WARNING(rep->flags) ? "WARNING" : "ERROR",
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rep->filename, rep->lineno,
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message ? message : "<no message>");
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}
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NS_IMETHODIMP
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mozJSComponentLoader::Init(nsIComponentManager *aCompMgr, nsISupports *aReg)
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{
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@ -612,7 +747,7 @@ mozJSComponentLoader::AutoRegisterComponent(PRInt32 when,
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#endif
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rv = AttemptRegistration(component, PR_FALSE);
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#ifdef DEBUG_shaver
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#ifdef DEBUG_shaver_off
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if (NS_SUCCEEDED(rv))
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fprintf(stderr, "registered module %s\n", (const char *)leafName);
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else if (rv == NS_ERROR_FACTORY_REGISTER_AGAIN)
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@ -788,7 +923,7 @@ mozJSComponentLoader::RegisterDeferredComponents(PRInt32 aWhen,
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PRUint32 count;
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rv = mDeferredComponents.Count(&count);
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#ifdef DEBUG_shaver
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#ifdef DEBUG_shaver_off
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fprintf(stderr, "mJCL: registering deferred (%d)\n", count);
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#endif
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if (NS_FAILED(rv) || !count)
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@ -808,7 +943,7 @@ mozJSComponentLoader::RegisterDeferredComponents(PRInt32 aWhen,
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}
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}
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#ifdef DEBUG_shaver
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#ifdef DEBUG_shaver_off
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rv = mDeferredComponents.Count(&count);
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if (NS_SUCCEEDED(rv)) {
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if (*aRegistered)
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@ -866,7 +1001,7 @@ mozJSComponentLoader::ModuleForLocation(const char *registryLocation,
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if (NS_FAILED(rv)) {
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#ifdef DEBUG_shaver
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fprintf(stderr, "WrapNative(%p,%p,nsIComponentManager) failed: %x\n",
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(JSContext*)cx, mCompMgr, rv);
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(void *)(JSContext*)cx, (void *)mCompMgr, rv);
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#endif
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return nsnull;
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}
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@ -1078,7 +1213,7 @@ mozJSComponentLoader::UnloadAll(PRInt32 aWhen)
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JS_MaybeGC(cx);
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}
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#ifdef DEBUG_shaver
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#ifdef DEBUG_shaver_off
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fprintf(stderr, "mJCL: UnloadAll(%d)\n", aWhen);
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#endif
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