b42c5eaa6a
Backed out changeset 84c2d1c04aa2 (bug 1313937) Backed out changeset 7cab9a1ea25f (bug 1313937) Backed out changeset affc7d1f130d (bug 1313937) Backed out changeset e13aacfe7944 (bug 1843066) Backed out changeset 21a9bee8f772 (bug 1843002) Backed out changeset d381b6365111 (bug 1843002)
1781 lines
59 KiB
C++
1781 lines
59 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsAttrValue.h"
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#include "nsCharSeparatedTokenizer.h"
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#include "nsContentUtils.h"
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#include "nsCSPUtils.h"
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#include "nsDebug.h"
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#include "nsCSPParser.h"
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#include "nsComponentManagerUtils.h"
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#include "nsIConsoleService.h"
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#include "nsIChannel.h"
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#include "nsICryptoHash.h"
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#include "nsIScriptError.h"
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#include "nsIStringBundle.h"
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#include "nsIURL.h"
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#include "nsNetUtil.h"
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#include "nsReadableUtils.h"
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#include "nsSandboxFlags.h"
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#include "nsServiceManagerUtils.h"
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#include "nsWhitespaceTokenizer.h"
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#include "mozilla/Components.h"
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#include "mozilla/dom/CSPDictionariesBinding.h"
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#include "mozilla/dom/Document.h"
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#include "mozilla/dom/SRIMetadata.h"
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#include "mozilla/StaticPrefs_security.h"
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using namespace mozilla;
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using mozilla::dom::SRIMetadata;
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#define DEFAULT_PORT -1
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static mozilla::LogModule* GetCspUtilsLog() {
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static mozilla::LazyLogModule gCspUtilsPRLog("CSPUtils");
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return gCspUtilsPRLog;
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}
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#define CSPUTILSLOG(args) \
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MOZ_LOG(GetCspUtilsLog(), mozilla::LogLevel::Debug, args)
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#define CSPUTILSLOGENABLED() \
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MOZ_LOG_TEST(GetCspUtilsLog(), mozilla::LogLevel::Debug)
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void CSP_PercentDecodeStr(const nsAString& aEncStr, nsAString& outDecStr) {
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outDecStr.Truncate();
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// helper function that should not be visible outside this methods scope
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struct local {
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static inline char16_t convertHexDig(char16_t aHexDig) {
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if (isNumberToken(aHexDig)) {
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return aHexDig - '0';
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}
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if (aHexDig >= 'A' && aHexDig <= 'F') {
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return aHexDig - 'A' + 10;
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}
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// must be a lower case character
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// (aHexDig >= 'a' && aHexDig <= 'f')
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return aHexDig - 'a' + 10;
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}
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};
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const char16_t *cur, *end, *hexDig1, *hexDig2;
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cur = aEncStr.BeginReading();
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end = aEncStr.EndReading();
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while (cur != end) {
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// if it's not a percent sign then there is
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// nothing to do for that character
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if (*cur != PERCENT_SIGN) {
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outDecStr.Append(*cur);
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cur++;
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continue;
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}
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// get the two hexDigs following the '%'-sign
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hexDig1 = cur + 1;
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hexDig2 = cur + 2;
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// if there are no hexdigs after the '%' then
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// there is nothing to do for us.
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if (hexDig1 == end || hexDig2 == end || !isValidHexDig(*hexDig1) ||
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!isValidHexDig(*hexDig2)) {
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outDecStr.Append(PERCENT_SIGN);
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cur++;
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continue;
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}
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// decode "% hexDig1 hexDig2" into a character.
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char16_t decChar =
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(local::convertHexDig(*hexDig1) << 4) + local::convertHexDig(*hexDig2);
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outDecStr.Append(decChar);
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// increment 'cur' to after the second hexDig
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cur = ++hexDig2;
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}
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}
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// The Content Security Policy should be inherited for
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// local schemes like: "about", "blob", "data", or "filesystem".
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// see: https://w3c.github.io/webappsec-csp/#initialize-document-csp
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bool CSP_ShouldResponseInheritCSP(nsIChannel* aChannel) {
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if (!aChannel) {
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return false;
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}
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nsCOMPtr<nsIURI> uri;
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nsresult rv = aChannel->GetURI(getter_AddRefs(uri));
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NS_ENSURE_SUCCESS(rv, false);
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bool isAbout = uri->SchemeIs("about");
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if (isAbout) {
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nsAutoCString aboutSpec;
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rv = uri->GetSpec(aboutSpec);
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NS_ENSURE_SUCCESS(rv, false);
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// also allow about:blank#foo
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if (StringBeginsWith(aboutSpec, "about:blank"_ns) ||
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StringBeginsWith(aboutSpec, "about:srcdoc"_ns)) {
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return true;
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}
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}
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return uri->SchemeIs("blob") || uri->SchemeIs("data") ||
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uri->SchemeIs("filesystem") || uri->SchemeIs("javascript");
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}
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void CSP_ApplyMetaCSPToDoc(mozilla::dom::Document& aDoc,
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const nsAString& aPolicyStr) {
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if (aDoc.IsLoadedAsData()) {
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return;
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}
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nsAutoString policyStr(
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nsContentUtils::TrimWhitespace<nsContentUtils::IsHTMLWhitespace>(
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aPolicyStr));
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if (policyStr.IsEmpty()) {
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return;
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}
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nsCOMPtr<nsIContentSecurityPolicy> csp = aDoc.GetCsp();
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if (!csp) {
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MOZ_ASSERT(false, "how come there is no CSP");
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return;
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}
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// Multiple CSPs (delivered through either header of meta tag) need to
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// be joined together, see:
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// https://w3c.github.io/webappsec/specs/content-security-policy/#delivery-html-meta-element
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nsresult rv =
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csp->AppendPolicy(policyStr,
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false, // csp via meta tag can not be report only
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true); // delivered through the meta tag
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NS_ENSURE_SUCCESS_VOID(rv);
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if (nsPIDOMWindowInner* inner = aDoc.GetInnerWindow()) {
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inner->SetCsp(csp);
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}
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aDoc.ApplySettingsFromCSP(false);
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}
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void CSP_GetLocalizedStr(const char* aName, const nsTArray<nsString>& aParams,
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nsAString& outResult) {
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nsCOMPtr<nsIStringBundle> keyStringBundle;
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nsCOMPtr<nsIStringBundleService> stringBundleService =
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mozilla::components::StringBundle::Service();
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NS_ASSERTION(stringBundleService, "String bundle service must be present!");
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stringBundleService->CreateBundle(
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"chrome://global/locale/security/csp.properties",
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getter_AddRefs(keyStringBundle));
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NS_ASSERTION(keyStringBundle, "Key string bundle must be available!");
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if (!keyStringBundle) {
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return;
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}
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keyStringBundle->FormatStringFromName(aName, aParams, outResult);
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}
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void CSP_LogStrMessage(const nsAString& aMsg) {
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nsCOMPtr<nsIConsoleService> console(
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do_GetService("@mozilla.org/consoleservice;1"));
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if (!console) {
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return;
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}
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nsString msg(aMsg);
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console->LogStringMessage(msg.get());
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}
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void CSP_LogMessage(const nsAString& aMessage, const nsAString& aSourceName,
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const nsAString& aSourceLine, uint32_t aLineNumber,
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uint32_t aColumnNumber, uint32_t aFlags,
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const nsACString& aCategory, uint64_t aInnerWindowID,
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bool aFromPrivateWindow) {
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nsCOMPtr<nsIConsoleService> console(
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do_GetService(NS_CONSOLESERVICE_CONTRACTID));
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nsCOMPtr<nsIScriptError> error(do_CreateInstance(NS_SCRIPTERROR_CONTRACTID));
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if (!console || !error) {
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return;
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}
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// Prepending CSP to the outgoing console message
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nsString cspMsg;
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CSP_GetLocalizedStr("CSPMessagePrefix",
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AutoTArray<nsString, 1>{nsString(aMessage)}, cspMsg);
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// Currently 'aSourceLine' is not logged to the console, because similar
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// information is already included within the source link of the message.
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// For inline violations however, the line and column number are 0 and
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// information contained within 'aSourceLine' can be really useful for devs.
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// E.g. 'aSourceLine' might be: 'onclick attribute on DIV element'.
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// In such cases we append 'aSourceLine' directly to the error message.
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if (!aSourceLine.IsEmpty() && aLineNumber == 0) {
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cspMsg.AppendLiteral(u"\nSource: ");
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cspMsg.Append(aSourceLine);
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}
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// Since we are leveraging csp errors as the category names which
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// we pass to devtools, we should prepend them with "CSP_" to
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// allow easy distincution in devtools code. e.g.
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// upgradeInsecureRequest -> CSP_upgradeInsecureRequest
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nsCString category("CSP_");
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category.Append(aCategory);
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nsresult rv;
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if (aInnerWindowID > 0) {
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rv = error->InitWithWindowID(cspMsg, aSourceName, aSourceLine, aLineNumber,
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aColumnNumber, aFlags, category,
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aInnerWindowID);
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} else {
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rv = error->Init(cspMsg, aSourceName, aSourceLine, aLineNumber,
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aColumnNumber, aFlags, category, aFromPrivateWindow,
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true /* from chrome context */);
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}
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if (NS_FAILED(rv)) {
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return;
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}
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console->LogMessage(error);
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}
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/**
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* Combines CSP_LogMessage and CSP_GetLocalizedStr into one call.
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*/
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void CSP_LogLocalizedStr(const char* aName, const nsTArray<nsString>& aParams,
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const nsAString& aSourceName,
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const nsAString& aSourceLine, uint32_t aLineNumber,
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uint32_t aColumnNumber, uint32_t aFlags,
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const nsACString& aCategory, uint64_t aInnerWindowID,
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bool aFromPrivateWindow) {
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nsAutoString logMsg;
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CSP_GetLocalizedStr(aName, aParams, logMsg);
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CSP_LogMessage(logMsg, aSourceName, aSourceLine, aLineNumber, aColumnNumber,
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aFlags, aCategory, aInnerWindowID, aFromPrivateWindow);
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}
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/* ===== Helpers ============================ */
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// This implements
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// https://w3c.github.io/webappsec-csp/#effective-directive-for-a-request.
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// However the spec doesn't currently cover all request destinations, which
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// we roughly represent using nsContentPolicyType.
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CSPDirective CSP_ContentTypeToDirective(nsContentPolicyType aType) {
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switch (aType) {
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case nsIContentPolicy::TYPE_IMAGE:
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case nsIContentPolicy::TYPE_IMAGESET:
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case nsIContentPolicy::TYPE_INTERNAL_IMAGE:
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case nsIContentPolicy::TYPE_INTERNAL_IMAGE_PRELOAD:
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case nsIContentPolicy::TYPE_INTERNAL_IMAGE_FAVICON:
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return nsIContentSecurityPolicy::IMG_SRC_DIRECTIVE;
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// BLock XSLT as script, see bug 910139
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case nsIContentPolicy::TYPE_XSLT:
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case nsIContentPolicy::TYPE_SCRIPT:
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case nsIContentPolicy::TYPE_INTERNAL_SCRIPT:
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case nsIContentPolicy::TYPE_INTERNAL_SCRIPT_PRELOAD:
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case nsIContentPolicy::TYPE_INTERNAL_MODULE:
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case nsIContentPolicy::TYPE_INTERNAL_MODULE_PRELOAD:
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case nsIContentPolicy::TYPE_INTERNAL_WORKER_IMPORT_SCRIPTS:
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case nsIContentPolicy::TYPE_INTERNAL_AUDIOWORKLET:
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case nsIContentPolicy::TYPE_INTERNAL_PAINTWORKLET:
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case nsIContentPolicy::TYPE_INTERNAL_CHROMEUTILS_COMPILED_SCRIPT:
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case nsIContentPolicy::TYPE_INTERNAL_FRAME_MESSAGEMANAGER_SCRIPT:
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// (https://github.com/w3c/webappsec-csp/issues/554)
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// Some of these types are not explicitly defined in the spec.
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//
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// Chrome seems to use script-src-elem for worklet!
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return nsIContentSecurityPolicy::SCRIPT_SRC_ELEM_DIRECTIVE;
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case nsIContentPolicy::TYPE_STYLESHEET:
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case nsIContentPolicy::TYPE_INTERNAL_STYLESHEET:
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case nsIContentPolicy::TYPE_INTERNAL_STYLESHEET_PRELOAD:
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return nsIContentSecurityPolicy::STYLE_SRC_ELEM_DIRECTIVE;
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case nsIContentPolicy::TYPE_FONT:
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case nsIContentPolicy::TYPE_INTERNAL_FONT_PRELOAD:
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return nsIContentSecurityPolicy::FONT_SRC_DIRECTIVE;
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case nsIContentPolicy::TYPE_MEDIA:
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case nsIContentPolicy::TYPE_INTERNAL_AUDIO:
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case nsIContentPolicy::TYPE_INTERNAL_VIDEO:
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case nsIContentPolicy::TYPE_INTERNAL_TRACK:
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return nsIContentSecurityPolicy::MEDIA_SRC_DIRECTIVE;
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case nsIContentPolicy::TYPE_WEB_MANIFEST:
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return nsIContentSecurityPolicy::WEB_MANIFEST_SRC_DIRECTIVE;
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case nsIContentPolicy::TYPE_INTERNAL_WORKER:
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case nsIContentPolicy::TYPE_INTERNAL_WORKER_STATIC_MODULE:
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case nsIContentPolicy::TYPE_INTERNAL_SHARED_WORKER:
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case nsIContentPolicy::TYPE_INTERNAL_SERVICE_WORKER:
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return nsIContentSecurityPolicy::WORKER_SRC_DIRECTIVE;
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case nsIContentPolicy::TYPE_SUBDOCUMENT:
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case nsIContentPolicy::TYPE_INTERNAL_FRAME:
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case nsIContentPolicy::TYPE_INTERNAL_IFRAME:
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return nsIContentSecurityPolicy::FRAME_SRC_DIRECTIVE;
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case nsIContentPolicy::TYPE_WEBSOCKET:
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case nsIContentPolicy::TYPE_XMLHTTPREQUEST:
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case nsIContentPolicy::TYPE_BEACON:
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case nsIContentPolicy::TYPE_PING:
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case nsIContentPolicy::TYPE_FETCH:
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case nsIContentPolicy::TYPE_INTERNAL_XMLHTTPREQUEST:
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case nsIContentPolicy::TYPE_INTERNAL_EVENTSOURCE:
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case nsIContentPolicy::TYPE_INTERNAL_FETCH_PRELOAD:
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case nsIContentPolicy::TYPE_WEB_IDENTITY:
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case nsIContentPolicy::TYPE_WEB_TRANSPORT:
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return nsIContentSecurityPolicy::CONNECT_SRC_DIRECTIVE;
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case nsIContentPolicy::TYPE_OBJECT:
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case nsIContentPolicy::TYPE_OBJECT_SUBREQUEST:
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case nsIContentPolicy::TYPE_INTERNAL_EMBED:
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case nsIContentPolicy::TYPE_INTERNAL_OBJECT:
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return nsIContentSecurityPolicy::OBJECT_SRC_DIRECTIVE;
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case nsIContentPolicy::TYPE_DTD:
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case nsIContentPolicy::TYPE_OTHER:
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case nsIContentPolicy::TYPE_SPECULATIVE:
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case nsIContentPolicy::TYPE_INTERNAL_DTD:
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case nsIContentPolicy::TYPE_INTERNAL_FORCE_ALLOWED_DTD:
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return nsIContentSecurityPolicy::DEFAULT_SRC_DIRECTIVE;
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// CSP does not apply to webrtc connections
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case nsIContentPolicy::TYPE_PROXIED_WEBRTC_MEDIA:
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// csp shold not block top level loads, e.g. in case
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// of a redirect.
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case nsIContentPolicy::TYPE_DOCUMENT:
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// CSP can not block csp reports
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case nsIContentPolicy::TYPE_CSP_REPORT:
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return nsIContentSecurityPolicy::NO_DIRECTIVE;
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case nsIContentPolicy::TYPE_SAVEAS_DOWNLOAD:
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case nsIContentPolicy::TYPE_UA_FONT:
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return nsIContentSecurityPolicy::NO_DIRECTIVE;
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// Fall through to error for all other directives
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// Note that we should never end up here for navigate-to
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case nsIContentPolicy::TYPE_INVALID:
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case nsIContentPolicy::TYPE_END:
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MOZ_ASSERT(false, "Can not map nsContentPolicyType to CSPDirective");
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// Do not add default: so that compilers can catch the missing case.
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}
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return nsIContentSecurityPolicy::DEFAULT_SRC_DIRECTIVE;
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}
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nsCSPHostSrc* CSP_CreateHostSrcFromSelfURI(nsIURI* aSelfURI) {
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// Create the host first
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nsCString host;
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aSelfURI->GetAsciiHost(host);
|
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nsCSPHostSrc* hostsrc = new nsCSPHostSrc(NS_ConvertUTF8toUTF16(host));
|
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hostsrc->setGeneratedFromSelfKeyword();
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|
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// Add the scheme.
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nsCString scheme;
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aSelfURI->GetScheme(scheme);
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hostsrc->setScheme(NS_ConvertUTF8toUTF16(scheme));
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// An empty host (e.g. for data:) indicates it's effectively a unique origin.
|
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// Please note that we still need to set the scheme on hostsrc (see above),
|
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// because it's used for reporting.
|
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if (host.EqualsLiteral("")) {
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hostsrc->setIsUniqueOrigin();
|
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// no need to query the port in that case.
|
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return hostsrc;
|
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}
|
||
|
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int32_t port;
|
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aSelfURI->GetPort(&port);
|
||
// Only add port if it's not default port.
|
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if (port > 0) {
|
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nsAutoString portStr;
|
||
portStr.AppendInt(port);
|
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hostsrc->setPort(portStr);
|
||
}
|
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return hostsrc;
|
||
}
|
||
|
||
bool CSP_IsEmptyDirective(const nsAString& aValue, const nsAString& aDir) {
|
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return (aDir.Length() == 0 && aValue.Length() == 0);
|
||
}
|
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bool CSP_IsDirective(const nsAString& aValue, CSPDirective aDir) {
|
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return aValue.LowerCaseEqualsASCII(CSP_CSPDirectiveToString(aDir));
|
||
}
|
||
|
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bool CSP_IsKeyword(const nsAString& aValue, enum CSPKeyword aKey) {
|
||
return aValue.LowerCaseEqualsASCII(CSP_EnumToUTF8Keyword(aKey));
|
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}
|
||
|
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bool CSP_IsQuotelessKeyword(const nsAString& aKey) {
|
||
nsString lowerKey;
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ToLowerCase(aKey, lowerKey);
|
||
|
||
nsAutoString keyword;
|
||
for (uint32_t i = 0; i < CSP_LAST_KEYWORD_VALUE; i++) {
|
||
// skipping the leading ' and trimming the trailing '
|
||
keyword.AssignASCII(gCSPUTF8Keywords[i] + 1);
|
||
keyword.Trim("'", false, true);
|
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if (lowerKey.Equals(keyword)) {
|
||
return true;
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/*
|
||
* Checks whether the current directive permits a specific
|
||
* scheme. This function is called from nsCSPSchemeSrc() and
|
||
* also nsCSPHostSrc.
|
||
* @param aEnforcementScheme
|
||
* The scheme that this directive allows
|
||
* @param aUri
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||
* The uri of the subresource load.
|
||
* @param aReportOnly
|
||
* Whether the enforced policy is report only or not.
|
||
* @param aUpgradeInsecure
|
||
* Whether the policy makes use of the directive
|
||
* 'upgrade-insecure-requests'.
|
||
* @param aFromSelfURI
|
||
* Whether a scheme was generated from the keyword 'self'
|
||
* which then allows schemeless sources to match ws and wss.
|
||
*/
|
||
|
||
bool permitsScheme(const nsAString& aEnforcementScheme, nsIURI* aUri,
|
||
bool aReportOnly, bool aUpgradeInsecure, bool aFromSelfURI) {
|
||
nsAutoCString scheme;
|
||
nsresult rv = aUri->GetScheme(scheme);
|
||
NS_ENSURE_SUCCESS(rv, false);
|
||
|
||
// no scheme to enforce, let's allow the load (e.g. script-src *)
|
||
if (aEnforcementScheme.IsEmpty()) {
|
||
return true;
|
||
}
|
||
|
||
// if the scheme matches, all good - allow the load
|
||
if (aEnforcementScheme.EqualsASCII(scheme.get())) {
|
||
return true;
|
||
}
|
||
|
||
// allow scheme-less sources where the protected resource is http
|
||
// and the load is https, see:
|
||
// http://www.w3.org/TR/CSP2/#match-source-expression
|
||
if (aEnforcementScheme.EqualsASCII("http")) {
|
||
if (scheme.EqualsASCII("https")) {
|
||
return true;
|
||
}
|
||
if ((scheme.EqualsASCII("ws") || scheme.EqualsASCII("wss")) &&
|
||
aFromSelfURI) {
|
||
return true;
|
||
}
|
||
}
|
||
if (aEnforcementScheme.EqualsASCII("https")) {
|
||
if (scheme.EqualsLiteral("wss") && aFromSelfURI) {
|
||
return true;
|
||
}
|
||
}
|
||
if (aEnforcementScheme.EqualsASCII("ws") && scheme.EqualsASCII("wss")) {
|
||
return true;
|
||
}
|
||
|
||
// Allow the load when enforcing upgrade-insecure-requests with the
|
||
// promise the request gets upgraded from http to https and ws to wss.
|
||
// See nsHttpChannel::Connect() and also WebSocket.cpp. Please note,
|
||
// the report only policies should not allow the load and report
|
||
// the error back to the page.
|
||
return (
|
||
(aUpgradeInsecure && !aReportOnly) &&
|
||
((scheme.EqualsASCII("http") &&
|
||
aEnforcementScheme.EqualsASCII("https")) ||
|
||
(scheme.EqualsASCII("ws") && aEnforcementScheme.EqualsASCII("wss"))));
|
||
}
|
||
|
||
/*
|
||
* A helper function for appending a CSP header to an existing CSP
|
||
* policy.
|
||
*
|
||
* @param aCsp the CSP policy
|
||
* @param aHeaderValue the header
|
||
* @param aReportOnly is this a report-only header?
|
||
*/
|
||
|
||
nsresult CSP_AppendCSPFromHeader(nsIContentSecurityPolicy* aCsp,
|
||
const nsAString& aHeaderValue,
|
||
bool aReportOnly) {
|
||
NS_ENSURE_ARG(aCsp);
|
||
|
||
// Need to tokenize the header value since multiple headers could be
|
||
// concatenated into one comma-separated list of policies.
|
||
// See RFC2616 section 4.2 (last paragraph)
|
||
nsresult rv = NS_OK;
|
||
for (const nsAString& policy :
|
||
nsCharSeparatedTokenizer(aHeaderValue, ',').ToRange()) {
|
||
rv = aCsp->AppendPolicy(policy, aReportOnly, false);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
{
|
||
CSPUTILSLOG(("CSP refined with policy: \"%s\"",
|
||
NS_ConvertUTF16toUTF8(policy).get()));
|
||
}
|
||
}
|
||
return NS_OK;
|
||
}
|
||
|
||
/* ===== nsCSPSrc ============================ */
|
||
|
||
nsCSPBaseSrc::nsCSPBaseSrc() : mInvalidated(false) {}
|
||
|
||
nsCSPBaseSrc::~nsCSPBaseSrc() = default;
|
||
|
||
// ::permits is only called for external load requests, therefore:
|
||
// nsCSPKeywordSrc and nsCSPHashSource fall back to this base class
|
||
// implementation which will never allow the load.
|
||
bool nsCSPBaseSrc::permits(nsIURI* aUri, const nsAString& aNonce,
|
||
bool aWasRedirected, bool aReportOnly,
|
||
bool aUpgradeInsecure, bool aParserCreated) const {
|
||
if (CSPUTILSLOGENABLED()) {
|
||
CSPUTILSLOG(
|
||
("nsCSPBaseSrc::permits, aUri: %s", aUri->GetSpecOrDefault().get()));
|
||
}
|
||
return false;
|
||
}
|
||
|
||
// ::allows is only called for inlined loads, therefore:
|
||
// nsCSPSchemeSrc, nsCSPHostSrc fall back
|
||
// to this base class implementation which will never allow the load.
|
||
bool nsCSPBaseSrc::allows(enum CSPKeyword aKeyword,
|
||
const nsAString& aHashOrNonce,
|
||
bool aParserCreated) const {
|
||
CSPUTILSLOG(("nsCSPBaseSrc::allows, aKeyWord: %s, a HashOrNonce: %s",
|
||
aKeyword == CSP_HASH ? "hash" : CSP_EnumToUTF8Keyword(aKeyword),
|
||
NS_ConvertUTF16toUTF8(aHashOrNonce).get()));
|
||
return false;
|
||
}
|
||
|
||
/* ====== nsCSPSchemeSrc ===================== */
|
||
|
||
nsCSPSchemeSrc::nsCSPSchemeSrc(const nsAString& aScheme) : mScheme(aScheme) {
|
||
ToLowerCase(mScheme);
|
||
}
|
||
|
||
nsCSPSchemeSrc::~nsCSPSchemeSrc() = default;
|
||
|
||
bool nsCSPSchemeSrc::permits(nsIURI* aUri, const nsAString& aNonce,
|
||
bool aWasRedirected, bool aReportOnly,
|
||
bool aUpgradeInsecure, bool aParserCreated) const {
|
||
if (CSPUTILSLOGENABLED()) {
|
||
CSPUTILSLOG(
|
||
("nsCSPSchemeSrc::permits, aUri: %s", aUri->GetSpecOrDefault().get()));
|
||
}
|
||
MOZ_ASSERT((!mScheme.EqualsASCII("")), "scheme can not be the empty string");
|
||
if (mInvalidated) {
|
||
return false;
|
||
}
|
||
return permitsScheme(mScheme, aUri, aReportOnly, aUpgradeInsecure, false);
|
||
}
|
||
|
||
bool nsCSPSchemeSrc::visit(nsCSPSrcVisitor* aVisitor) const {
|
||
return aVisitor->visitSchemeSrc(*this);
|
||
}
|
||
|
||
void nsCSPSchemeSrc::toString(nsAString& outStr) const {
|
||
outStr.Append(mScheme);
|
||
outStr.AppendLiteral(":");
|
||
}
|
||
|
||
/* ===== nsCSPHostSrc ======================== */
|
||
|
||
nsCSPHostSrc::nsCSPHostSrc(const nsAString& aHost)
|
||
: mHost(aHost),
|
||
mGeneratedFromSelfKeyword(false),
|
||
mIsUniqueOrigin(false),
|
||
mWithinFrameAncstorsDir(false) {
|
||
ToLowerCase(mHost);
|
||
}
|
||
|
||
nsCSPHostSrc::~nsCSPHostSrc() = default;
|
||
|
||
/*
|
||
* Checks whether the current directive permits a specific port.
|
||
* @param aEnforcementScheme
|
||
* The scheme that this directive allows
|
||
* (used to query the default port for that scheme)
|
||
* @param aEnforcementPort
|
||
* The port that this directive allows
|
||
* @param aResourceURI
|
||
* The uri of the subresource load
|
||
*/
|
||
bool permitsPort(const nsAString& aEnforcementScheme,
|
||
const nsAString& aEnforcementPort, nsIURI* aResourceURI) {
|
||
// If enforcement port is the wildcard, don't block the load.
|
||
if (aEnforcementPort.EqualsASCII("*")) {
|
||
return true;
|
||
}
|
||
|
||
int32_t resourcePort;
|
||
nsresult rv = aResourceURI->GetPort(&resourcePort);
|
||
if (NS_FAILED(rv) && aEnforcementPort.IsEmpty()) {
|
||
// If we cannot get a Port (e.g. because of an Custom Protocol handler)
|
||
// We need to check if a default port is associated with the Scheme
|
||
if (aEnforcementScheme.IsEmpty()) {
|
||
return false;
|
||
}
|
||
int defaultPortforScheme =
|
||
NS_GetDefaultPort(NS_ConvertUTF16toUTF8(aEnforcementScheme).get());
|
||
|
||
// If there is no default port associated with the Scheme (
|
||
// defaultPortforScheme == -1) or it is an externally handled protocol (
|
||
// defaultPortforScheme == 0 ) and the csp does not enforce a port - we can
|
||
// allow not having a port
|
||
return (defaultPortforScheme == -1 || defaultPortforScheme == -0);
|
||
}
|
||
// Avoid unnecessary string creation/manipulation and don't block the
|
||
// load if the resource to be loaded uses the default port for that
|
||
// scheme and there is no port to be enforced.
|
||
// Note, this optimization relies on scheme checks within permitsScheme().
|
||
if (resourcePort == DEFAULT_PORT && aEnforcementPort.IsEmpty()) {
|
||
return true;
|
||
}
|
||
|
||
// By now we know at that either the resourcePort does not use the default
|
||
// port or there is a port restriction to be enforced. A port value of -1
|
||
// corresponds to the protocol's default port (eg. -1 implies port 80 for
|
||
// http URIs), in such a case we have to query the default port of the
|
||
// resource to be loaded.
|
||
if (resourcePort == DEFAULT_PORT) {
|
||
nsAutoCString resourceScheme;
|
||
rv = aResourceURI->GetScheme(resourceScheme);
|
||
NS_ENSURE_SUCCESS(rv, false);
|
||
resourcePort = NS_GetDefaultPort(resourceScheme.get());
|
||
}
|
||
|
||
// If there is a port to be enforced and the ports match, then
|
||
// don't block the load.
|
||
nsString resourcePortStr;
|
||
resourcePortStr.AppendInt(resourcePort);
|
||
if (aEnforcementPort.Equals(resourcePortStr)) {
|
||
return true;
|
||
}
|
||
|
||
// If there is no port to be enforced, query the default port for the load.
|
||
nsString enforcementPort(aEnforcementPort);
|
||
if (enforcementPort.IsEmpty()) {
|
||
// For scheme less sources, our parser always generates a scheme
|
||
// which is the scheme of the protected resource.
|
||
MOZ_ASSERT(!aEnforcementScheme.IsEmpty(),
|
||
"need a scheme to query default port");
|
||
int32_t defaultEnforcementPort =
|
||
NS_GetDefaultPort(NS_ConvertUTF16toUTF8(aEnforcementScheme).get());
|
||
enforcementPort.Truncate();
|
||
enforcementPort.AppendInt(defaultEnforcementPort);
|
||
}
|
||
|
||
// If default ports match, don't block the load
|
||
if (enforcementPort.Equals(resourcePortStr)) {
|
||
return true;
|
||
}
|
||
|
||
// Additional port matching where the regular URL matching algorithm
|
||
// treats insecure ports as matching their secure variants.
|
||
// default port for http is :80
|
||
// default port for https is :443
|
||
if (enforcementPort.EqualsLiteral("80") &&
|
||
resourcePortStr.EqualsLiteral("443")) {
|
||
return true;
|
||
}
|
||
|
||
// ports do not match, block the load.
|
||
return false;
|
||
}
|
||
|
||
bool nsCSPHostSrc::permits(nsIURI* aUri, const nsAString& aNonce,
|
||
bool aWasRedirected, bool aReportOnly,
|
||
bool aUpgradeInsecure, bool aParserCreated) const {
|
||
if (CSPUTILSLOGENABLED()) {
|
||
CSPUTILSLOG(
|
||
("nsCSPHostSrc::permits, aUri: %s", aUri->GetSpecOrDefault().get()));
|
||
}
|
||
|
||
if (mInvalidated || mIsUniqueOrigin) {
|
||
return false;
|
||
}
|
||
|
||
// we are following the enforcement rules from the spec, see:
|
||
// http://www.w3.org/TR/CSP11/#match-source-expression
|
||
|
||
// 4.3) scheme matching: Check if the scheme matches.
|
||
if (!permitsScheme(mScheme, aUri, aReportOnly, aUpgradeInsecure,
|
||
mGeneratedFromSelfKeyword)) {
|
||
return false;
|
||
}
|
||
|
||
// The host in nsCSpHostSrc should never be empty. In case we are enforcing
|
||
// just a specific scheme, the parser should generate a nsCSPSchemeSource.
|
||
NS_ASSERTION((!mHost.IsEmpty()), "host can not be the empty string");
|
||
|
||
// Before we can check if the host matches, we have to
|
||
// extract the host part from aUri.
|
||
nsAutoCString uriHost;
|
||
nsresult rv = aUri->GetAsciiHost(uriHost);
|
||
NS_ENSURE_SUCCESS(rv, false);
|
||
|
||
nsString decodedUriHost;
|
||
CSP_PercentDecodeStr(NS_ConvertUTF8toUTF16(uriHost), decodedUriHost);
|
||
|
||
// 2) host matching: Enforce a single *
|
||
if (mHost.EqualsASCII("*")) {
|
||
// The single ASTERISK character (*) does not match a URI's scheme of a type
|
||
// designating a globally unique identifier (such as blob:, data:, or
|
||
// filesystem:) At the moment firefox does not support filesystem; but for
|
||
// future compatibility we support it in CSP according to the spec,
|
||
// see: 4.2.2 Matching Source Expressions Note, that allowlisting any of
|
||
// these schemes would call nsCSPSchemeSrc::permits().
|
||
if (aUri->SchemeIs("blob") || aUri->SchemeIs("data") ||
|
||
aUri->SchemeIs("filesystem")) {
|
||
return false;
|
||
}
|
||
|
||
// If no scheme is present there also wont be a port and folder to check
|
||
// which means we can return early
|
||
if (mScheme.IsEmpty()) {
|
||
return true;
|
||
}
|
||
}
|
||
// 4.5) host matching: Check if the allowed host starts with a wilcard.
|
||
else if (mHost.First() == '*') {
|
||
NS_ASSERTION(
|
||
mHost[1] == '.',
|
||
"Second character needs to be '.' whenever host starts with '*'");
|
||
|
||
// Eliminate leading "*", but keeping the FULL STOP (.) thereafter before
|
||
// checking if the remaining characters match
|
||
nsString wildCardHost = mHost;
|
||
wildCardHost = Substring(wildCardHost, 1, wildCardHost.Length() - 1);
|
||
if (!StringEndsWith(decodedUriHost, wildCardHost)) {
|
||
return false;
|
||
}
|
||
}
|
||
// 4.6) host matching: Check if hosts match.
|
||
else if (!mHost.Equals(decodedUriHost)) {
|
||
return false;
|
||
}
|
||
|
||
// Port matching: Check if the ports match.
|
||
if (!permitsPort(mScheme, mPort, aUri)) {
|
||
return false;
|
||
}
|
||
|
||
// 4.9) Path matching: If there is a path, we have to enforce
|
||
// path-level matching, unless the channel got redirected, see:
|
||
// http://www.w3.org/TR/CSP11/#source-list-paths-and-redirects
|
||
if (!aWasRedirected && !mPath.IsEmpty()) {
|
||
// converting aUri into nsIURL so we can strip query and ref
|
||
// example.com/test#foo -> example.com/test
|
||
// example.com/test?val=foo -> example.com/test
|
||
nsCOMPtr<nsIURL> url = do_QueryInterface(aUri);
|
||
if (!url) {
|
||
NS_ASSERTION(false, "can't QI into nsIURI");
|
||
return false;
|
||
}
|
||
nsAutoCString uriPath;
|
||
rv = url->GetFilePath(uriPath);
|
||
NS_ENSURE_SUCCESS(rv, false);
|
||
|
||
if (mWithinFrameAncstorsDir) {
|
||
// no path matching for frame-ancestors to not leak any path information.
|
||
return true;
|
||
}
|
||
|
||
nsString decodedUriPath;
|
||
CSP_PercentDecodeStr(NS_ConvertUTF8toUTF16(uriPath), decodedUriPath);
|
||
|
||
// check if the last character of mPath is '/'; if so
|
||
// we just have to check loading resource is within
|
||
// the allowed path.
|
||
if (mPath.Last() == '/') {
|
||
if (!StringBeginsWith(decodedUriPath, mPath)) {
|
||
return false;
|
||
}
|
||
}
|
||
// otherwise mPath refers to a specific file, and we have to
|
||
// check if the loading resource matches the file.
|
||
else {
|
||
if (!mPath.Equals(decodedUriPath)) {
|
||
return false;
|
||
}
|
||
}
|
||
}
|
||
|
||
// At the end: scheme, host, port and path match -> allow the load.
|
||
return true;
|
||
}
|
||
|
||
bool nsCSPHostSrc::visit(nsCSPSrcVisitor* aVisitor) const {
|
||
return aVisitor->visitHostSrc(*this);
|
||
}
|
||
|
||
void nsCSPHostSrc::toString(nsAString& outStr) const {
|
||
if (mGeneratedFromSelfKeyword) {
|
||
outStr.AppendLiteral("'self'");
|
||
return;
|
||
}
|
||
|
||
// If mHost is a single "*", we append the wildcard and return.
|
||
if (mHost.EqualsASCII("*") && mScheme.IsEmpty() && mPort.IsEmpty()) {
|
||
outStr.Append(mHost);
|
||
return;
|
||
}
|
||
|
||
// append scheme
|
||
outStr.Append(mScheme);
|
||
|
||
// append host
|
||
outStr.AppendLiteral("://");
|
||
outStr.Append(mHost);
|
||
|
||
// append port
|
||
if (!mPort.IsEmpty()) {
|
||
outStr.AppendLiteral(":");
|
||
outStr.Append(mPort);
|
||
}
|
||
|
||
// append path
|
||
outStr.Append(mPath);
|
||
}
|
||
|
||
void nsCSPHostSrc::setScheme(const nsAString& aScheme) {
|
||
mScheme = aScheme;
|
||
ToLowerCase(mScheme);
|
||
}
|
||
|
||
void nsCSPHostSrc::setPort(const nsAString& aPort) { mPort = aPort; }
|
||
|
||
void nsCSPHostSrc::appendPath(const nsAString& aPath) { mPath.Append(aPath); }
|
||
|
||
/* ===== nsCSPKeywordSrc ===================== */
|
||
|
||
nsCSPKeywordSrc::nsCSPKeywordSrc(enum CSPKeyword aKeyword)
|
||
: mKeyword(aKeyword) {
|
||
NS_ASSERTION((aKeyword != CSP_SELF),
|
||
"'self' should have been replaced in the parser");
|
||
}
|
||
|
||
nsCSPKeywordSrc::~nsCSPKeywordSrc() = default;
|
||
|
||
bool nsCSPKeywordSrc::permits(nsIURI* aUri, const nsAString& aNonce,
|
||
bool aWasRedirected, bool aReportOnly,
|
||
bool aUpgradeInsecure,
|
||
bool aParserCreated) const {
|
||
// no need to check for invalidated, this will always return false unless
|
||
// it is an nsCSPKeywordSrc for 'strict-dynamic', which should allow non
|
||
// parser created scripts.
|
||
return ((mKeyword == CSP_STRICT_DYNAMIC) && !aParserCreated);
|
||
}
|
||
|
||
bool nsCSPKeywordSrc::allows(enum CSPKeyword aKeyword,
|
||
const nsAString& aHashOrNonce,
|
||
bool aParserCreated) const {
|
||
CSPUTILSLOG(
|
||
("nsCSPKeywordSrc::allows, aKeyWord: %s, aHashOrNonce: %s, mInvalidated: "
|
||
"%s",
|
||
CSP_EnumToUTF8Keyword(aKeyword),
|
||
NS_ConvertUTF16toUTF8(aHashOrNonce).get(),
|
||
mInvalidated ? "true" : "false"));
|
||
|
||
if (mInvalidated) {
|
||
// only 'self', 'report-sample' and 'unsafe-inline' are keywords that can be
|
||
// ignored. Please note that the parser already translates 'self' into a uri
|
||
// (see assertion in constructor).
|
||
MOZ_ASSERT(mKeyword == CSP_UNSAFE_INLINE || mKeyword == CSP_REPORT_SAMPLE,
|
||
"should only invalidate unsafe-inline");
|
||
return false;
|
||
}
|
||
// either the keyword allows the load or the policy contains 'strict-dynamic',
|
||
// in which case we have to make sure the script is not parser created before
|
||
// allowing the load and also eval & wasm-eval should be blocked even if
|
||
// 'strict-dynamic' is present. Should be allowed only if 'unsafe-eval' is
|
||
// present.
|
||
return ((mKeyword == aKeyword) ||
|
||
((mKeyword == CSP_STRICT_DYNAMIC) && !aParserCreated &&
|
||
aKeyword != CSP_UNSAFE_EVAL && aKeyword != CSP_WASM_UNSAFE_EVAL));
|
||
}
|
||
|
||
bool nsCSPKeywordSrc::visit(nsCSPSrcVisitor* aVisitor) const {
|
||
return aVisitor->visitKeywordSrc(*this);
|
||
}
|
||
|
||
void nsCSPKeywordSrc::toString(nsAString& outStr) const {
|
||
outStr.Append(CSP_EnumToUTF16Keyword(mKeyword));
|
||
}
|
||
|
||
/* ===== nsCSPNonceSrc ==================== */
|
||
|
||
nsCSPNonceSrc::nsCSPNonceSrc(const nsAString& aNonce) : mNonce(aNonce) {}
|
||
|
||
nsCSPNonceSrc::~nsCSPNonceSrc() = default;
|
||
|
||
bool nsCSPNonceSrc::permits(nsIURI* aUri, const nsAString& aNonce,
|
||
bool aWasRedirected, bool aReportOnly,
|
||
bool aUpgradeInsecure, bool aParserCreated) const {
|
||
if (CSPUTILSLOGENABLED()) {
|
||
CSPUTILSLOG(("nsCSPNonceSrc::permits, aUri: %s, aNonce: %s",
|
||
aUri->GetSpecOrDefault().get(),
|
||
NS_ConvertUTF16toUTF8(aNonce).get()));
|
||
}
|
||
|
||
if (aReportOnly && aWasRedirected && aNonce.IsEmpty()) {
|
||
/* Fix for Bug 1505412
|
||
* If we land here, we're currently handling a script-preload which got
|
||
* redirected. Preloads do not have any info about the nonce assiociated.
|
||
* Because of Report-Only the preload passes the 1st CSP-check so the
|
||
* preload does not get retried with a nonce attached.
|
||
* Currently we're relying on the script-manager to
|
||
* provide a fake loadinfo to check the preloads against csp.
|
||
* So during HTTPChannel->OnRedirect we cant check csp for this case.
|
||
* But as the script-manager already checked the csp,
|
||
* a report would already have been send,
|
||
* if the nonce didnt match.
|
||
* So we can pass the check here for Report-Only Cases.
|
||
*/
|
||
MOZ_ASSERT(aParserCreated == false,
|
||
"Skipping nonce-check is only allowed for Preloads");
|
||
return true;
|
||
}
|
||
|
||
// nonces can not be invalidated by strict-dynamic
|
||
return mNonce.Equals(aNonce);
|
||
}
|
||
|
||
bool nsCSPNonceSrc::allows(enum CSPKeyword aKeyword,
|
||
const nsAString& aHashOrNonce,
|
||
bool aParserCreated) const {
|
||
CSPUTILSLOG(("nsCSPNonceSrc::allows, aKeyWord: %s, a HashOrNonce: %s",
|
||
CSP_EnumToUTF8Keyword(aKeyword),
|
||
NS_ConvertUTF16toUTF8(aHashOrNonce).get()));
|
||
|
||
if (aKeyword != CSP_NONCE) {
|
||
return false;
|
||
}
|
||
// nonces can not be invalidated by strict-dynamic
|
||
return mNonce.Equals(aHashOrNonce);
|
||
}
|
||
|
||
bool nsCSPNonceSrc::visit(nsCSPSrcVisitor* aVisitor) const {
|
||
return aVisitor->visitNonceSrc(*this);
|
||
}
|
||
|
||
void nsCSPNonceSrc::toString(nsAString& outStr) const {
|
||
outStr.Append(CSP_EnumToUTF16Keyword(CSP_NONCE));
|
||
outStr.Append(mNonce);
|
||
outStr.AppendLiteral("'");
|
||
}
|
||
|
||
/* ===== nsCSPHashSrc ===================== */
|
||
|
||
nsCSPHashSrc::nsCSPHashSrc(const nsAString& aAlgo, const nsAString& aHash)
|
||
: mAlgorithm(aAlgo), mHash(aHash) {
|
||
// Only the algo should be rewritten to lowercase, the hash must remain the
|
||
// same.
|
||
ToLowerCase(mAlgorithm);
|
||
// Normalize the base64url encoding to base64 encoding:
|
||
char16_t* cur = mHash.BeginWriting();
|
||
char16_t* end = mHash.EndWriting();
|
||
|
||
for (; cur < end; ++cur) {
|
||
if (char16_t('-') == *cur) {
|
||
*cur = char16_t('+');
|
||
}
|
||
if (char16_t('_') == *cur) {
|
||
*cur = char16_t('/');
|
||
}
|
||
}
|
||
}
|
||
|
||
nsCSPHashSrc::~nsCSPHashSrc() = default;
|
||
|
||
bool nsCSPHashSrc::allows(enum CSPKeyword aKeyword,
|
||
const nsAString& aHashOrNonce,
|
||
bool aParserCreated) const {
|
||
CSPUTILSLOG(("nsCSPHashSrc::allows, aKeyWord: %s, a HashOrNonce: %s",
|
||
CSP_EnumToUTF8Keyword(aKeyword),
|
||
NS_ConvertUTF16toUTF8(aHashOrNonce).get()));
|
||
|
||
if (aKeyword != CSP_HASH) {
|
||
return false;
|
||
}
|
||
|
||
// hashes can not be invalidated by strict-dynamic
|
||
|
||
// Convert aHashOrNonce to UTF-8
|
||
NS_ConvertUTF16toUTF8 utf8_hash(aHashOrNonce);
|
||
|
||
nsCOMPtr<nsICryptoHash> hasher;
|
||
nsresult rv = NS_NewCryptoHash(NS_ConvertUTF16toUTF8(mAlgorithm),
|
||
getter_AddRefs(hasher));
|
||
NS_ENSURE_SUCCESS(rv, false);
|
||
|
||
rv = hasher->Update((uint8_t*)utf8_hash.get(), utf8_hash.Length());
|
||
NS_ENSURE_SUCCESS(rv, false);
|
||
|
||
nsAutoCString hash;
|
||
rv = hasher->Finish(true, hash);
|
||
NS_ENSURE_SUCCESS(rv, false);
|
||
|
||
return NS_ConvertUTF16toUTF8(mHash).Equals(hash);
|
||
}
|
||
|
||
bool nsCSPHashSrc::visit(nsCSPSrcVisitor* aVisitor) const {
|
||
return aVisitor->visitHashSrc(*this);
|
||
}
|
||
|
||
void nsCSPHashSrc::toString(nsAString& outStr) const {
|
||
outStr.AppendLiteral("'");
|
||
outStr.Append(mAlgorithm);
|
||
outStr.AppendLiteral("-");
|
||
outStr.Append(mHash);
|
||
outStr.AppendLiteral("'");
|
||
}
|
||
|
||
/* ===== nsCSPReportURI ===================== */
|
||
|
||
nsCSPReportURI::nsCSPReportURI(nsIURI* aURI) : mReportURI(aURI) {}
|
||
|
||
nsCSPReportURI::~nsCSPReportURI() = default;
|
||
|
||
bool nsCSPReportURI::visit(nsCSPSrcVisitor* aVisitor) const { return false; }
|
||
|
||
void nsCSPReportURI::toString(nsAString& outStr) const {
|
||
nsAutoCString spec;
|
||
nsresult rv = mReportURI->GetSpec(spec);
|
||
if (NS_FAILED(rv)) {
|
||
return;
|
||
}
|
||
outStr.AppendASCII(spec.get());
|
||
}
|
||
|
||
/* ===== nsCSPSandboxFlags ===================== */
|
||
|
||
nsCSPSandboxFlags::nsCSPSandboxFlags(const nsAString& aFlags) : mFlags(aFlags) {
|
||
ToLowerCase(mFlags);
|
||
}
|
||
|
||
nsCSPSandboxFlags::~nsCSPSandboxFlags() = default;
|
||
|
||
bool nsCSPSandboxFlags::visit(nsCSPSrcVisitor* aVisitor) const { return false; }
|
||
|
||
void nsCSPSandboxFlags::toString(nsAString& outStr) const {
|
||
outStr.Append(mFlags);
|
||
}
|
||
|
||
/* ===== nsCSPDirective ====================== */
|
||
|
||
nsCSPDirective::nsCSPDirective(CSPDirective aDirective) {
|
||
mDirective = aDirective;
|
||
}
|
||
|
||
nsCSPDirective::~nsCSPDirective() {
|
||
for (uint32_t i = 0; i < mSrcs.Length(); i++) {
|
||
delete mSrcs[i];
|
||
}
|
||
}
|
||
|
||
// This check only considers types "script-like"
|
||
// (https://fetch.spec.whatwg.org/#request-destination-script-like) that can
|
||
// also have integrity metadata.
|
||
static bool IsScriptLikeWithIntegrity(nsContentPolicyType aType) {
|
||
switch (aType) {
|
||
case nsIContentPolicy::TYPE_SCRIPT:
|
||
case nsIContentPolicy::TYPE_INTERNAL_SCRIPT:
|
||
case nsIContentPolicy::TYPE_INTERNAL_SCRIPT_PRELOAD:
|
||
case nsIContentPolicy::TYPE_INTERNAL_MODULE:
|
||
case nsIContentPolicy::TYPE_INTERNAL_MODULE_PRELOAD:
|
||
return true;
|
||
default:
|
||
return false;
|
||
}
|
||
}
|
||
|
||
// https://www.w3.org/TR/SRI/#parse-metadata
|
||
// This function is similar to SRICheck::IntegrityMetadata, but also keeps
|
||
// SRI metadata with weaker hashes.
|
||
// CSP treats "no metadata" and empty results the same way.
|
||
static nsTArray<SRIMetadata> ParseSRIMetadata(const nsAString& aMetadata) {
|
||
// Step 1. Let result be the empty set.
|
||
// Step 2. Let empty be equal to true.
|
||
nsTArray<SRIMetadata> result;
|
||
|
||
NS_ConvertUTF16toUTF8 metadataList(aMetadata);
|
||
nsAutoCString token;
|
||
|
||
// Step 3. For each token returned by splitting metadata on spaces:
|
||
nsCWhitespaceTokenizer tokenizer(metadataList);
|
||
while (tokenizer.hasMoreTokens()) {
|
||
token = tokenizer.nextToken();
|
||
// Step 3.1. Set empty to false.
|
||
// Step 3.3. Parse token per the grammar in integrity metadata.
|
||
SRIMetadata metadata(token);
|
||
// Step 3.2. If token is not a valid metadata, skip the remaining steps, and
|
||
// proceed to the next token.
|
||
if (metadata.IsMalformed()) {
|
||
continue;
|
||
}
|
||
|
||
// Step 3.4. Let algorithm be the alg component of token.
|
||
// Step 3.5. If algorithm is a hash function recognized by the user agent,
|
||
// add the
|
||
// parsed token to result.
|
||
if (metadata.IsAlgorithmSupported()) {
|
||
result.AppendElement(metadata);
|
||
}
|
||
}
|
||
|
||
// Step 4. Return no metadata if empty is true, otherwise return result.
|
||
return result;
|
||
}
|
||
|
||
bool nsCSPDirective::permits(CSPDirective aDirective, nsILoadInfo* aLoadInfo,
|
||
nsIURI* aUri, const nsAString& aNonce,
|
||
bool aWasRedirected, bool aReportOnly,
|
||
bool aUpgradeInsecure, bool aParserCreated) const {
|
||
MOZ_ASSERT(equals(aDirective) || isDefaultDirective());
|
||
|
||
if (CSPUTILSLOGENABLED()) {
|
||
CSPUTILSLOG(
|
||
("nsCSPDirective::permits, aUri: %s", aUri->GetSpecOrDefault().get()));
|
||
}
|
||
|
||
// https://w3c.github.io/webappsec-csp/#script-pre-request
|
||
if (aLoadInfo) {
|
||
// Step 1. If request’s destination is script-like:
|
||
if (IsScriptLikeWithIntegrity(aLoadInfo->InternalContentPolicyType()) &&
|
||
StaticPrefs::security_csp_external_hashes_enabled()) {
|
||
MOZ_ASSERT(aDirective == CSPDirective::SCRIPT_SRC_ELEM_DIRECTIVE);
|
||
|
||
// Step 1.2. Let integrity expressions be the set of source expressions in
|
||
// directive’s value that match the hash-source grammar.
|
||
nsTArray<nsCSPHashSrc*> integrityExpressions;
|
||
for (uint32_t i = 0; i < mSrcs.Length(); i++) {
|
||
if (mSrcs[i]->isHash()) {
|
||
integrityExpressions.AppendElement(
|
||
static_cast<nsCSPHashSrc*>(mSrcs[i]));
|
||
}
|
||
}
|
||
|
||
// Step 1.3. If integrity expressions is not empty:
|
||
if (!integrityExpressions.IsEmpty()) {
|
||
// Step 1.3.1. Let integrity sources be the result of executing the
|
||
// algorithm defined in [SRI 3.3.3 Parse metadata] on request’s
|
||
// integrity metadata.
|
||
nsAutoString integrityMetadata;
|
||
aLoadInfo->GetIntegrityMetadata(integrityMetadata);
|
||
|
||
nsTArray<SRIMetadata> integritySources =
|
||
ParseSRIMetadata(integrityMetadata);
|
||
MOZ_ASSERT(
|
||
integritySources.IsEmpty() == integrityMetadata.IsEmpty(),
|
||
"The integrity metadata should be only be empty, "
|
||
"when the parsed string was completely empty, otherwise it should "
|
||
"include at least one valid hash");
|
||
|
||
// Step 1.3.2. If integrity sources is "no metadata" or an empty set,
|
||
// skip the remaining substeps.
|
||
if (!integritySources.IsEmpty()) {
|
||
// Step 1.3.3. Let bypass due to integrity match be true.
|
||
bool bypass = true;
|
||
|
||
nsAutoCString sourceAlgorithmUTF8;
|
||
nsAutoCString sourceHashUTF8;
|
||
nsAutoString sourceAlgorithm;
|
||
nsAutoString sourceHash;
|
||
nsAutoString algorithm;
|
||
nsAutoString hash;
|
||
|
||
// Step 1.3.4. For each source of integrity sources:
|
||
for (const SRIMetadata& source : integritySources) {
|
||
source.GetAlgorithm(&sourceAlgorithmUTF8);
|
||
sourceAlgorithm = NS_ConvertUTF8toUTF16(sourceAlgorithmUTF8);
|
||
source.GetHash(0, &sourceHashUTF8);
|
||
sourceHash = NS_ConvertUTF8toUTF16(sourceHashUTF8);
|
||
|
||
// Step 1.3.4.1 If directive’s value does not contain a source
|
||
// expression whose hash-algorithm is an ASCII case-insensitive
|
||
// match for source’s hash-algorithm, and whose base64-value is
|
||
// identical to source’s base64-value, then set bypass due to
|
||
// integrity match to false.
|
||
bool found = false;
|
||
for (const nsCSPHashSrc* hashSrc : integrityExpressions) {
|
||
hashSrc->getAlgorithm(algorithm);
|
||
hashSrc->getHash(hash);
|
||
|
||
// The nsCSPHashSrc constructor lowercases algorithm, so this
|
||
// is case-insensitive.
|
||
if (sourceAlgorithm == algorithm && sourceHash == hash) {
|
||
found = true;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (!found) {
|
||
bypass = false;
|
||
break;
|
||
}
|
||
}
|
||
|
||
// Step 1.3.5. If bypass due to integrity match is true, return
|
||
// "Allowed".
|
||
if (bypass) {
|
||
return true;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
for (uint32_t i = 0; i < mSrcs.Length(); i++) {
|
||
if (mSrcs[i]->permits(aUri, aNonce, aWasRedirected, aReportOnly,
|
||
aUpgradeInsecure, aParserCreated)) {
|
||
return true;
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
bool nsCSPDirective::allows(enum CSPKeyword aKeyword,
|
||
const nsAString& aHashOrNonce,
|
||
bool aParserCreated) const {
|
||
CSPUTILSLOG(("nsCSPDirective::allows, aKeyWord: %s, a HashOrNonce: %s",
|
||
CSP_EnumToUTF8Keyword(aKeyword),
|
||
NS_ConvertUTF16toUTF8(aHashOrNonce).get()));
|
||
|
||
for (uint32_t i = 0; i < mSrcs.Length(); i++) {
|
||
if (mSrcs[i]->allows(aKeyword, aHashOrNonce, aParserCreated)) {
|
||
return true;
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
void nsCSPDirective::toString(nsAString& outStr) const {
|
||
// Append directive name
|
||
outStr.AppendASCII(CSP_CSPDirectiveToString(mDirective));
|
||
outStr.AppendLiteral(" ");
|
||
|
||
// Append srcs
|
||
StringJoinAppend(outStr, u" "_ns, mSrcs,
|
||
[](nsAString& dest, nsCSPBaseSrc* cspBaseSrc) {
|
||
cspBaseSrc->toString(dest);
|
||
});
|
||
}
|
||
|
||
void nsCSPDirective::toDomCSPStruct(mozilla::dom::CSP& outCSP) const {
|
||
mozilla::dom::Sequence<nsString> srcs;
|
||
nsString src;
|
||
if (NS_WARN_IF(!srcs.SetCapacity(mSrcs.Length(), mozilla::fallible))) {
|
||
MOZ_ASSERT(false,
|
||
"Not enough memory for 'sources' sequence in "
|
||
"nsCSPDirective::toDomCSPStruct().");
|
||
return;
|
||
}
|
||
for (uint32_t i = 0; i < mSrcs.Length(); i++) {
|
||
src.Truncate();
|
||
mSrcs[i]->toString(src);
|
||
if (!srcs.AppendElement(src, mozilla::fallible)) {
|
||
MOZ_ASSERT(false,
|
||
"Failed to append to 'sources' sequence in "
|
||
"nsCSPDirective::toDomCSPStruct().");
|
||
}
|
||
}
|
||
|
||
switch (mDirective) {
|
||
case nsIContentSecurityPolicy::DEFAULT_SRC_DIRECTIVE:
|
||
outCSP.mDefault_src.Construct();
|
||
outCSP.mDefault_src.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::SCRIPT_SRC_DIRECTIVE:
|
||
outCSP.mScript_src.Construct();
|
||
outCSP.mScript_src.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::OBJECT_SRC_DIRECTIVE:
|
||
outCSP.mObject_src.Construct();
|
||
outCSP.mObject_src.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::STYLE_SRC_DIRECTIVE:
|
||
outCSP.mStyle_src.Construct();
|
||
outCSP.mStyle_src.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::IMG_SRC_DIRECTIVE:
|
||
outCSP.mImg_src.Construct();
|
||
outCSP.mImg_src.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::MEDIA_SRC_DIRECTIVE:
|
||
outCSP.mMedia_src.Construct();
|
||
outCSP.mMedia_src.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::FRAME_SRC_DIRECTIVE:
|
||
outCSP.mFrame_src.Construct();
|
||
outCSP.mFrame_src.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::FONT_SRC_DIRECTIVE:
|
||
outCSP.mFont_src.Construct();
|
||
outCSP.mFont_src.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::CONNECT_SRC_DIRECTIVE:
|
||
outCSP.mConnect_src.Construct();
|
||
outCSP.mConnect_src.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::REPORT_URI_DIRECTIVE:
|
||
outCSP.mReport_uri.Construct();
|
||
outCSP.mReport_uri.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::FRAME_ANCESTORS_DIRECTIVE:
|
||
outCSP.mFrame_ancestors.Construct();
|
||
outCSP.mFrame_ancestors.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::WEB_MANIFEST_SRC_DIRECTIVE:
|
||
outCSP.mManifest_src.Construct();
|
||
outCSP.mManifest_src.Value() = std::move(srcs);
|
||
return;
|
||
// not supporting REFLECTED_XSS_DIRECTIVE
|
||
|
||
case nsIContentSecurityPolicy::BASE_URI_DIRECTIVE:
|
||
outCSP.mBase_uri.Construct();
|
||
outCSP.mBase_uri.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::FORM_ACTION_DIRECTIVE:
|
||
outCSP.mForm_action.Construct();
|
||
outCSP.mForm_action.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::BLOCK_ALL_MIXED_CONTENT:
|
||
outCSP.mBlock_all_mixed_content.Construct();
|
||
// does not have any srcs
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::UPGRADE_IF_INSECURE_DIRECTIVE:
|
||
outCSP.mUpgrade_insecure_requests.Construct();
|
||
// does not have any srcs
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::CHILD_SRC_DIRECTIVE:
|
||
outCSP.mChild_src.Construct();
|
||
outCSP.mChild_src.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::SANDBOX_DIRECTIVE:
|
||
outCSP.mSandbox.Construct();
|
||
outCSP.mSandbox.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::WORKER_SRC_DIRECTIVE:
|
||
outCSP.mWorker_src.Construct();
|
||
outCSP.mWorker_src.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::SCRIPT_SRC_ELEM_DIRECTIVE:
|
||
outCSP.mScript_src_elem.Construct();
|
||
outCSP.mScript_src_elem.Value() = std::move(srcs);
|
||
return;
|
||
|
||
case nsIContentSecurityPolicy::SCRIPT_SRC_ATTR_DIRECTIVE:
|
||
outCSP.mScript_src_attr.Construct();
|
||
outCSP.mScript_src_attr.Value() = std::move(srcs);
|
||
return;
|
||
|
||
default:
|
||
NS_ASSERTION(false, "cannot find directive to convert CSP to JSON");
|
||
}
|
||
}
|
||
|
||
void nsCSPDirective::getReportURIs(nsTArray<nsString>& outReportURIs) const {
|
||
NS_ASSERTION((mDirective == nsIContentSecurityPolicy::REPORT_URI_DIRECTIVE),
|
||
"not a report-uri directive");
|
||
|
||
// append uris
|
||
nsString tmpReportURI;
|
||
for (uint32_t i = 0; i < mSrcs.Length(); i++) {
|
||
tmpReportURI.Truncate();
|
||
mSrcs[i]->toString(tmpReportURI);
|
||
outReportURIs.AppendElement(tmpReportURI);
|
||
}
|
||
}
|
||
|
||
bool nsCSPDirective::visitSrcs(nsCSPSrcVisitor* aVisitor) const {
|
||
for (uint32_t i = 0; i < mSrcs.Length(); i++) {
|
||
if (!mSrcs[i]->visit(aVisitor)) {
|
||
return false;
|
||
}
|
||
}
|
||
return true;
|
||
}
|
||
|
||
bool nsCSPDirective::equals(CSPDirective aDirective) const {
|
||
return (mDirective == aDirective);
|
||
}
|
||
|
||
void nsCSPDirective::getDirName(nsAString& outStr) const {
|
||
outStr.AppendASCII(CSP_CSPDirectiveToString(mDirective));
|
||
}
|
||
|
||
bool nsCSPDirective::hasReportSampleKeyword() const {
|
||
for (nsCSPBaseSrc* src : mSrcs) {
|
||
if (src->isReportSample()) {
|
||
return true;
|
||
}
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
/* =============== nsCSPChildSrcDirective ============= */
|
||
|
||
nsCSPChildSrcDirective::nsCSPChildSrcDirective(CSPDirective aDirective)
|
||
: nsCSPDirective(aDirective),
|
||
mRestrictFrames(false),
|
||
mRestrictWorkers(false) {}
|
||
|
||
nsCSPChildSrcDirective::~nsCSPChildSrcDirective() = default;
|
||
|
||
bool nsCSPChildSrcDirective::equals(CSPDirective aDirective) const {
|
||
if (aDirective == nsIContentSecurityPolicy::FRAME_SRC_DIRECTIVE) {
|
||
return mRestrictFrames;
|
||
}
|
||
if (aDirective == nsIContentSecurityPolicy::WORKER_SRC_DIRECTIVE) {
|
||
return mRestrictWorkers;
|
||
}
|
||
return (mDirective == aDirective);
|
||
}
|
||
|
||
/* =============== nsCSPScriptSrcDirective ============= */
|
||
|
||
nsCSPScriptSrcDirective::nsCSPScriptSrcDirective(CSPDirective aDirective)
|
||
: nsCSPDirective(aDirective) {}
|
||
|
||
nsCSPScriptSrcDirective::~nsCSPScriptSrcDirective() = default;
|
||
|
||
bool nsCSPScriptSrcDirective::equals(CSPDirective aDirective) const {
|
||
if (aDirective == nsIContentSecurityPolicy::WORKER_SRC_DIRECTIVE) {
|
||
return mRestrictWorkers;
|
||
}
|
||
if (aDirective == nsIContentSecurityPolicy::SCRIPT_SRC_ELEM_DIRECTIVE) {
|
||
return mRestrictScriptElem;
|
||
}
|
||
if (aDirective == nsIContentSecurityPolicy::SCRIPT_SRC_ATTR_DIRECTIVE) {
|
||
return mRestrictScriptAttr;
|
||
}
|
||
return mDirective == aDirective;
|
||
}
|
||
|
||
/* =============== nsCSPStyleSrcDirective ============= */
|
||
|
||
nsCSPStyleSrcDirective::nsCSPStyleSrcDirective(CSPDirective aDirective)
|
||
: nsCSPDirective(aDirective) {}
|
||
|
||
nsCSPStyleSrcDirective::~nsCSPStyleSrcDirective() = default;
|
||
|
||
bool nsCSPStyleSrcDirective::equals(CSPDirective aDirective) const {
|
||
if (aDirective == nsIContentSecurityPolicy::STYLE_SRC_ELEM_DIRECTIVE) {
|
||
return mRestrictStyleElem;
|
||
}
|
||
if (aDirective == nsIContentSecurityPolicy::STYLE_SRC_ATTR_DIRECTIVE) {
|
||
return mRestrictStyleAttr;
|
||
}
|
||
return mDirective == aDirective;
|
||
}
|
||
|
||
/* =============== nsBlockAllMixedContentDirective ============= */
|
||
|
||
nsBlockAllMixedContentDirective::nsBlockAllMixedContentDirective(
|
||
CSPDirective aDirective)
|
||
: nsCSPDirective(aDirective) {}
|
||
|
||
nsBlockAllMixedContentDirective::~nsBlockAllMixedContentDirective() = default;
|
||
|
||
void nsBlockAllMixedContentDirective::toString(nsAString& outStr) const {
|
||
outStr.AppendASCII(CSP_CSPDirectiveToString(
|
||
nsIContentSecurityPolicy::BLOCK_ALL_MIXED_CONTENT));
|
||
}
|
||
|
||
void nsBlockAllMixedContentDirective::getDirName(nsAString& outStr) const {
|
||
outStr.AppendASCII(CSP_CSPDirectiveToString(
|
||
nsIContentSecurityPolicy::BLOCK_ALL_MIXED_CONTENT));
|
||
}
|
||
|
||
/* =============== nsUpgradeInsecureDirective ============= */
|
||
|
||
nsUpgradeInsecureDirective::nsUpgradeInsecureDirective(CSPDirective aDirective)
|
||
: nsCSPDirective(aDirective) {}
|
||
|
||
nsUpgradeInsecureDirective::~nsUpgradeInsecureDirective() = default;
|
||
|
||
void nsUpgradeInsecureDirective::toString(nsAString& outStr) const {
|
||
outStr.AppendASCII(CSP_CSPDirectiveToString(
|
||
nsIContentSecurityPolicy::UPGRADE_IF_INSECURE_DIRECTIVE));
|
||
}
|
||
|
||
void nsUpgradeInsecureDirective::getDirName(nsAString& outStr) const {
|
||
outStr.AppendASCII(CSP_CSPDirectiveToString(
|
||
nsIContentSecurityPolicy::UPGRADE_IF_INSECURE_DIRECTIVE));
|
||
}
|
||
|
||
/* ===== nsCSPPolicy ========================= */
|
||
|
||
nsCSPPolicy::nsCSPPolicy()
|
||
: mUpgradeInsecDir(nullptr),
|
||
mReportOnly(false),
|
||
mDeliveredViaMetaTag(false) {
|
||
CSPUTILSLOG(("nsCSPPolicy::nsCSPPolicy"));
|
||
}
|
||
|
||
nsCSPPolicy::~nsCSPPolicy() {
|
||
CSPUTILSLOG(("nsCSPPolicy::~nsCSPPolicy"));
|
||
|
||
for (uint32_t i = 0; i < mDirectives.Length(); i++) {
|
||
delete mDirectives[i];
|
||
}
|
||
}
|
||
|
||
bool nsCSPPolicy::permits(CSPDirective aDir, nsILoadInfo* aLoadInfo,
|
||
nsIURI* aUri, bool aWasRedirected, bool aSpecific,
|
||
nsAString& outViolatedDirective) const {
|
||
if (CSPUTILSLOGENABLED()) {
|
||
CSPUTILSLOG(("nsCSPPolicy::permits, aUri: %s, aDir: %d, aSpecific: %s",
|
||
aUri->GetSpecOrDefault().get(), aDir,
|
||
aSpecific ? "true" : "false"));
|
||
}
|
||
|
||
NS_ASSERTION(aUri, "permits needs an uri to perform the check!");
|
||
outViolatedDirective.Truncate();
|
||
|
||
bool parserCreated = false;
|
||
nsAutoString nonce;
|
||
if (aLoadInfo) {
|
||
parserCreated = aLoadInfo->GetParserCreatedScript();
|
||
MOZ_ALWAYS_SUCCEEDS(aLoadInfo->GetCspNonce(nonce));
|
||
}
|
||
|
||
nsCSPDirective* defaultDir = nullptr;
|
||
|
||
// Try to find a relevant directive
|
||
// These directive arrays are short (1-5 elements), not worth using a
|
||
// hashtable.
|
||
for (uint32_t i = 0; i < mDirectives.Length(); i++) {
|
||
if (mDirectives[i]->equals(aDir)) {
|
||
if (!mDirectives[i]->permits(aDir, aLoadInfo, aUri, nonce, aWasRedirected,
|
||
mReportOnly, mUpgradeInsecDir,
|
||
parserCreated)) {
|
||
mDirectives[i]->getDirName(outViolatedDirective);
|
||
return false;
|
||
}
|
||
return true;
|
||
}
|
||
if (mDirectives[i]->isDefaultDirective()) {
|
||
defaultDir = mDirectives[i];
|
||
}
|
||
}
|
||
|
||
// If the above loop runs through, we haven't found a matching directive.
|
||
// Avoid relooping, just store the result of default-src while looping.
|
||
if (!aSpecific && defaultDir) {
|
||
if (!defaultDir->permits(aDir, aLoadInfo, aUri, nonce, aWasRedirected,
|
||
mReportOnly, mUpgradeInsecDir, parserCreated)) {
|
||
defaultDir->getDirName(outViolatedDirective);
|
||
return false;
|
||
}
|
||
return true;
|
||
}
|
||
|
||
// Nothing restricts this, so we're allowing the load
|
||
// See bug 764937
|
||
return true;
|
||
}
|
||
|
||
bool nsCSPPolicy::allows(CSPDirective aDirective, enum CSPKeyword aKeyword,
|
||
const nsAString& aHashOrNonce,
|
||
bool aParserCreated) const {
|
||
CSPUTILSLOG(("nsCSPPolicy::allows, aKeyWord: %s, a HashOrNonce: %s",
|
||
CSP_EnumToUTF8Keyword(aKeyword),
|
||
NS_ConvertUTF16toUTF8(aHashOrNonce).get()));
|
||
|
||
nsCSPDirective* defaultDir = nullptr;
|
||
|
||
// Try to find a matching directive
|
||
for (uint32_t i = 0; i < mDirectives.Length(); i++) {
|
||
if (mDirectives[i]->isDefaultDirective()) {
|
||
defaultDir = mDirectives[i];
|
||
continue;
|
||
}
|
||
if (mDirectives[i]->equals(aDirective)) {
|
||
if (mDirectives[i]->allows(aKeyword, aHashOrNonce, aParserCreated)) {
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
}
|
||
|
||
// If the above loop runs through, we haven't found a matching directive.
|
||
// Avoid relooping, just store the result of default-src while looping.
|
||
if (defaultDir) {
|
||
return defaultDir->allows(aKeyword, aHashOrNonce, aParserCreated);
|
||
}
|
||
|
||
// Allowing the load; see Bug 885433
|
||
// a) inline scripts (also unsafe eval) should only be blocked
|
||
// if there is a [script-src] or [default-src]
|
||
// b) inline styles should only be blocked
|
||
// if there is a [style-src] or [default-src]
|
||
return true;
|
||
}
|
||
|
||
void nsCSPPolicy::toString(nsAString& outStr) const {
|
||
StringJoinAppend(outStr, u"; "_ns, mDirectives,
|
||
[](nsAString& dest, nsCSPDirective* cspDirective) {
|
||
cspDirective->toString(dest);
|
||
});
|
||
}
|
||
|
||
void nsCSPPolicy::toDomCSPStruct(mozilla::dom::CSP& outCSP) const {
|
||
outCSP.mReport_only = mReportOnly;
|
||
|
||
for (uint32_t i = 0; i < mDirectives.Length(); ++i) {
|
||
mDirectives[i]->toDomCSPStruct(outCSP);
|
||
}
|
||
}
|
||
|
||
bool nsCSPPolicy::hasDirective(CSPDirective aDir) const {
|
||
for (uint32_t i = 0; i < mDirectives.Length(); i++) {
|
||
if (mDirectives[i]->equals(aDir)) {
|
||
return true;
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
bool nsCSPPolicy::allowsNavigateTo(nsIURI* aURI, bool aWasRedirected,
|
||
bool aEnforceAllowlist) const {
|
||
bool allowsNavigateTo = true;
|
||
|
||
for (unsigned long i = 0; i < mDirectives.Length(); i++) {
|
||
if (mDirectives[i]->equals(
|
||
nsIContentSecurityPolicy::NAVIGATE_TO_DIRECTIVE)) {
|
||
// Early return if we can skip the allowlist AND 'unsafe-allow-redirects'
|
||
// is present.
|
||
if (!aEnforceAllowlist &&
|
||
mDirectives[i]->allows(CSP_UNSAFE_ALLOW_REDIRECTS, u""_ns, false)) {
|
||
return true;
|
||
}
|
||
// Otherwise, check against the allowlist.
|
||
if (!mDirectives[i]->permits(
|
||
nsIContentSecurityPolicy::NAVIGATE_TO_DIRECTIVE, nullptr, aURI,
|
||
u""_ns, aWasRedirected, false, false, false)) {
|
||
allowsNavigateTo = false;
|
||
}
|
||
}
|
||
}
|
||
|
||
return allowsNavigateTo;
|
||
}
|
||
|
||
/*
|
||
* Use this function only after ::allows() returned 'false'. Most and
|
||
* foremost it's used to get the violated directive before sending reports.
|
||
* The parameter outDirective is the equivalent of 'outViolatedDirective'
|
||
* for the ::permits() function family.
|
||
*/
|
||
void nsCSPPolicy::getDirectiveStringAndReportSampleForContentType(
|
||
CSPDirective aDirective, nsAString& outDirective,
|
||
bool* aReportSample) const {
|
||
MOZ_ASSERT(aReportSample);
|
||
*aReportSample = false;
|
||
|
||
nsCSPDirective* defaultDir = nullptr;
|
||
for (uint32_t i = 0; i < mDirectives.Length(); i++) {
|
||
if (mDirectives[i]->isDefaultDirective()) {
|
||
defaultDir = mDirectives[i];
|
||
continue;
|
||
}
|
||
if (mDirectives[i]->equals(aDirective)) {
|
||
mDirectives[i]->getDirName(outDirective);
|
||
*aReportSample = mDirectives[i]->hasReportSampleKeyword();
|
||
return;
|
||
}
|
||
}
|
||
// if we haven't found a matching directive yet,
|
||
// the contentType must be restricted by the default directive
|
||
if (defaultDir) {
|
||
defaultDir->getDirName(outDirective);
|
||
*aReportSample = defaultDir->hasReportSampleKeyword();
|
||
return;
|
||
}
|
||
NS_ASSERTION(false, "Can not query directive string for contentType!");
|
||
outDirective.AppendLiteral("couldNotQueryViolatedDirective");
|
||
}
|
||
|
||
void nsCSPPolicy::getDirectiveAsString(CSPDirective aDir,
|
||
nsAString& outDirective) const {
|
||
for (uint32_t i = 0; i < mDirectives.Length(); i++) {
|
||
if (mDirectives[i]->equals(aDir)) {
|
||
mDirectives[i]->toString(outDirective);
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
|
||
/*
|
||
* Helper function that returns the underlying bit representation of sandbox
|
||
* flags. The function returns SANDBOXED_NONE if there are no sandbox
|
||
* directives.
|
||
*/
|
||
uint32_t nsCSPPolicy::getSandboxFlags() const {
|
||
for (uint32_t i = 0; i < mDirectives.Length(); i++) {
|
||
if (mDirectives[i]->equals(nsIContentSecurityPolicy::SANDBOX_DIRECTIVE)) {
|
||
nsAutoString flags;
|
||
mDirectives[i]->toString(flags);
|
||
|
||
if (flags.IsEmpty()) {
|
||
return SANDBOX_ALL_FLAGS;
|
||
}
|
||
|
||
nsAttrValue attr;
|
||
attr.ParseAtomArray(flags);
|
||
|
||
return nsContentUtils::ParseSandboxAttributeToFlags(&attr);
|
||
}
|
||
}
|
||
|
||
return SANDBOXED_NONE;
|
||
}
|
||
|
||
void nsCSPPolicy::getReportURIs(nsTArray<nsString>& outReportURIs) const {
|
||
for (uint32_t i = 0; i < mDirectives.Length(); i++) {
|
||
if (mDirectives[i]->equals(
|
||
nsIContentSecurityPolicy::REPORT_URI_DIRECTIVE)) {
|
||
mDirectives[i]->getReportURIs(outReportURIs);
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
|
||
bool nsCSPPolicy::visitDirectiveSrcs(CSPDirective aDir,
|
||
nsCSPSrcVisitor* aVisitor) const {
|
||
for (uint32_t i = 0; i < mDirectives.Length(); i++) {
|
||
if (mDirectives[i]->equals(aDir)) {
|
||
return mDirectives[i]->visitSrcs(aVisitor);
|
||
}
|
||
}
|
||
return false;
|
||
}
|