Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 369 insertions, 0 deletions

diff --git a/caps/nsJSPrincipals.cpp b/caps/nsJSPrincipals.cpp
new file mode 100644
index 0000000000..d089bffdf5
--- /dev/null
+++ b/caps/nsJSPrincipals.cpp
@@ -0,0 +1,369 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsIPrincipal.h"
+#include "xpcpublic.h"
+#include "nsString.h"
+#include "nsJSPrincipals.h"
+#include "nsCOMPtr.h"
+#include "nsStringBuffer.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/StaticPtr.h"
+#include "mozilla/dom/StructuredCloneTags.h"
+#include "mozilla/ipc/BackgroundUtils.h"
+#include "mozilla/ipc/PBackgroundSharedTypes.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+using namespace mozilla::ipc;
+
+NS_IMETHODIMP_(MozExternalRefCountType)
+nsJSPrincipals::AddRef() {
+  MOZ_ASSERT(int32_t(refcount) >= 0, "illegal refcnt");
+  nsrefcnt count = ++refcount;
+  NS_LOG_ADDREF(this, count, "nsJSPrincipals", sizeof(*this));
+  return count;
+}
+
+NS_IMETHODIMP_(MozExternalRefCountType)
+nsJSPrincipals::Release() {
+  MOZ_ASSERT(0 != refcount, "dup release");
+  nsrefcnt count = --refcount;
+  NS_LOG_RELEASE(this, count, "nsJSPrincipals");
+  if (count == 0) {
+    delete this;
+  }
+
+  return count;
+}
+
+/* static */
+bool nsJSPrincipals::Subsume(JSPrincipals* jsprin, JSPrincipals* other) {
+  bool result;
+  nsresult rv = nsJSPrincipals::get(jsprin)->Subsumes(
+      nsJSPrincipals::get(other), &result);
+  return NS_SUCCEEDED(rv) && result;
+}
+
+/* static */
+void nsJSPrincipals::Destroy(JSPrincipals* jsprin) {
+  // The JS runtime can call this method during the last GC when
+  // nsScriptSecurityManager is destroyed. So we must not assume here that
+  // the security manager still exists.
+
+  nsJSPrincipals* nsjsprin = nsJSPrincipals::get(jsprin);
+
+  // We need to destroy the nsIPrincipal. We'll do this by adding
+  // to the refcount and calling release
+
+#ifdef NS_BUILD_REFCNT_LOGGING
+  // The refcount logging considers AddRef-to-1 to indicate creation,
+  // so trick it into thinking it's otherwise, but balance the
+  // Release() we do below.
+  nsjsprin->refcount++;
+  nsjsprin->AddRef();
+  nsjsprin->refcount--;
+#else
+  nsjsprin->refcount++;
+#endif
+  nsjsprin->Release();
+}
+
+#ifdef DEBUG
+
+// Defined here so one can do principals->dump() in the debugger
+JS_PUBLIC_API void JSPrincipals::dump() {
+  if (debugToken == nsJSPrincipals::DEBUG_TOKEN) {
+    nsAutoCString str;
+    nsresult rv = static_cast<nsJSPrincipals*>(this)->GetScriptLocation(str);
+    fprintf(stderr, "nsIPrincipal (%p) = %s\n", static_cast<void*>(this),
+            NS_SUCCEEDED(rv) ? str.get() : "(unknown)");
+  } else {
+    fprintf(stderr,
+            "!!! JSPrincipals (%p) is not nsJSPrincipals instance - bad token: "
+            "actual=0x%x expected=0x%x\n",
+            this, unsigned(debugToken), unsigned(nsJSPrincipals::DEBUG_TOKEN));
+  }
+}
+
+#endif
+
+/* static */
+bool nsJSPrincipals::ReadPrincipals(JSContext* aCx,
+                                    JSStructuredCloneReader* aReader,
+                                    JSPrincipals** aOutPrincipals) {
+  uint32_t tag;
+  uint32_t unused;
+  if (!JS_ReadUint32Pair(aReader, &tag, &unused)) {
+    return false;
+  }
+
+  if (tag != SCTAG_DOM_NULL_PRINCIPAL && tag != SCTAG_DOM_SYSTEM_PRINCIPAL &&
+      tag != SCTAG_DOM_CONTENT_PRINCIPAL &&
+      tag != SCTAG_DOM_EXPANDED_PRINCIPAL) {
+    xpc::Throw(aCx, NS_ERROR_DOM_DATA_CLONE_ERR);
+    return false;
+  }
+
+  return ReadKnownPrincipalType(aCx, aReader, tag, aOutPrincipals);
+}
+
+static bool ReadPrincipalInfo(JSStructuredCloneReader* aReader,
+                              OriginAttributes& aAttrs, nsACString& aSpec,
+                              nsACString& aOriginNoSuffix,
+                              nsACString& aBaseDomain) {
+  uint32_t suffixLength, specLength;
+  if (!JS_ReadUint32Pair(aReader, &suffixLength, &specLength)) {
+    return false;
+  }
+
+  nsAutoCString suffix;
+  if (!suffix.SetLength(suffixLength, fallible)) {
+    return false;
+  }
+
+  if (!JS_ReadBytes(aReader, suffix.BeginWriting(), suffixLength)) {
+    return false;
+  }
+
+  if (!aAttrs.PopulateFromSuffix(suffix)) {
+    return false;
+  }
+
+  if (!aSpec.SetLength(specLength, fallible)) {
+    return false;
+  }
+
+  if (!JS_ReadBytes(aReader, aSpec.BeginWriting(), specLength)) {
+    return false;
+  }
+
+  uint32_t originNoSuffixLength, dummy;
+  if (!JS_ReadUint32Pair(aReader, &originNoSuffixLength, &dummy)) {
+    return false;
+  }
+
+  MOZ_ASSERT(dummy == 0);
+  if (dummy != 0) {
+    return false;
+  }
+
+  if (!aOriginNoSuffix.SetLength(originNoSuffixLength, fallible)) {
+    return false;
+  }
+
+  if (!JS_ReadBytes(aReader, aOriginNoSuffix.BeginWriting(),
+                    originNoSuffixLength)) {
+    return false;
+  }
+
+  uint32_t baseDomainIsVoid, baseDomainLength;
+  if (!JS_ReadUint32Pair(aReader, &baseDomainIsVoid, &baseDomainLength)) {
+    return false;
+  }
+
+  if (baseDomainIsVoid != 0 && baseDomainIsVoid != 1) {
+    return false;
+  }
+
+  if (baseDomainIsVoid) {
+    if (baseDomainLength != 0) {
+      return false;
+    }
+
+    aBaseDomain.SetIsVoid(true);
+    return true;
+  }
+
+  if (!aBaseDomain.SetLength(baseDomainLength, fallible)) {
+    return false;
+  }
+
+  if (!JS_ReadBytes(aReader, aBaseDomain.BeginWriting(), baseDomainLength)) {
+    return false;
+  }
+
+  return true;
+}
+
+static bool ReadPrincipalInfo(JSStructuredCloneReader* aReader, uint32_t aTag,
+                              PrincipalInfo& aInfo) {
+  if (aTag == SCTAG_DOM_SYSTEM_PRINCIPAL) {
+    aInfo = SystemPrincipalInfo();
+  } else if (aTag == SCTAG_DOM_NULL_PRINCIPAL) {
+    OriginAttributes attrs;
+    nsAutoCString spec;
+    nsAutoCString originNoSuffix;
+    nsAutoCString baseDomain;
+    if (!::ReadPrincipalInfo(aReader, attrs, spec, originNoSuffix,
+                             baseDomain)) {
+      return false;
+    }
+    aInfo = NullPrincipalInfo(attrs, spec);
+  } else if (aTag == SCTAG_DOM_EXPANDED_PRINCIPAL) {
+    uint32_t length, unused;
+    if (!JS_ReadUint32Pair(aReader, &length, &unused)) {
+      return false;
+    }
+
+    ExpandedPrincipalInfo expanded;
+
+    for (uint32_t i = 0; i < length; i++) {
+      uint32_t tag;
+      if (!JS_ReadUint32Pair(aReader, &tag, &unused)) {
+        return false;
+      }
+
+      PrincipalInfo sub;
+      if (!ReadPrincipalInfo(aReader, tag, sub)) {
+        return false;
+      }
+      expanded.allowlist().AppendElement(sub);
+    }
+
+    aInfo = expanded;
+  } else if (aTag == SCTAG_DOM_CONTENT_PRINCIPAL) {
+    OriginAttributes attrs;
+    nsAutoCString spec;
+    nsAutoCString originNoSuffix;
+    nsAutoCString baseDomain;
+    if (!::ReadPrincipalInfo(aReader, attrs, spec, originNoSuffix,
+                             baseDomain)) {
+      return false;
+    }
+
+#ifdef FUZZING
+    if (originNoSuffix.IsEmpty()) {
+      return false;
+    }
+#endif
+
+    MOZ_DIAGNOSTIC_ASSERT(!originNoSuffix.IsEmpty());
+
+    // XXX: Do we care about mDomain for structured clone?
+    aInfo = ContentPrincipalInfo(attrs, originNoSuffix, spec, Nothing(),
+                                 baseDomain);
+  } else {
+#ifdef FUZZING
+    return false;
+#else
+    MOZ_CRASH("unexpected principal structured clone tag");
+#endif
+  }
+
+  return true;
+}
+
+/* static */
+bool nsJSPrincipals::ReadPrincipalInfo(JSStructuredCloneReader* aReader,
+                                       PrincipalInfo& aInfo) {
+  uint32_t tag, unused;
+  if (!JS_ReadUint32Pair(aReader, &tag, &unused)) {
+    return false;
+  }
+  return ::ReadPrincipalInfo(aReader, tag, aInfo);
+}
+
+/* static */
+bool nsJSPrincipals::ReadKnownPrincipalType(JSContext* aCx,
+                                            JSStructuredCloneReader* aReader,
+                                            uint32_t aTag,
+                                            JSPrincipals** aOutPrincipals) {
+  MOZ_ASSERT(aTag == SCTAG_DOM_NULL_PRINCIPAL ||
+             aTag == SCTAG_DOM_SYSTEM_PRINCIPAL ||
+             aTag == SCTAG_DOM_CONTENT_PRINCIPAL ||
+             aTag == SCTAG_DOM_EXPANDED_PRINCIPAL);
+
+  PrincipalInfo info;
+  if (!::ReadPrincipalInfo(aReader, aTag, info)) {
+    return false;
+  }
+
+  auto principalOrErr = PrincipalInfoToPrincipal(info);
+  if (NS_WARN_IF(principalOrErr.isErr())) {
+    xpc::Throw(aCx, NS_ERROR_DOM_DATA_CLONE_ERR);
+    return false;
+  }
+
+  nsCOMPtr<nsIPrincipal> principal = principalOrErr.unwrap();
+
+  *aOutPrincipals = get(principal.forget().take());
+  return true;
+}
+
+static bool WritePrincipalInfo(JSStructuredCloneWriter* aWriter,
+                               const OriginAttributes& aAttrs,
+                               const nsCString& aSpec,
+                               const nsCString& aOriginNoSuffix,
+                               const nsCString& aBaseDomain) {
+  nsAutoCString suffix;
+  aAttrs.CreateSuffix(suffix);
+
+  if (!(JS_WriteUint32Pair(aWriter, suffix.Length(), aSpec.Length()) &&
+        JS_WriteBytes(aWriter, suffix.get(), suffix.Length()) &&
+        JS_WriteBytes(aWriter, aSpec.get(), aSpec.Length()) &&
+        JS_WriteUint32Pair(aWriter, aOriginNoSuffix.Length(), 0) &&
+        JS_WriteBytes(aWriter, aOriginNoSuffix.get(),
+                      aOriginNoSuffix.Length()))) {
+    return false;
+  }
+
+  if (aBaseDomain.IsVoid()) {
+    return JS_WriteUint32Pair(aWriter, 1, 0);
+  }
+
+  return JS_WriteUint32Pair(aWriter, 0, aBaseDomain.Length()) &&
+         JS_WriteBytes(aWriter, aBaseDomain.get(), aBaseDomain.Length());
+}
+
+/* static */
+bool nsJSPrincipals::WritePrincipalInfo(JSStructuredCloneWriter* aWriter,
+                                        const PrincipalInfo& aInfo) {
+  if (aInfo.type() == PrincipalInfo::TNullPrincipalInfo) {
+    const NullPrincipalInfo& nullInfo = aInfo;
+    return JS_WriteUint32Pair(aWriter, SCTAG_DOM_NULL_PRINCIPAL, 0) &&
+           ::WritePrincipalInfo(aWriter, nullInfo.attrs(), nullInfo.spec(),
+                                ""_ns, ""_ns);
+  }
+  if (aInfo.type() == PrincipalInfo::TSystemPrincipalInfo) {
+    return JS_WriteUint32Pair(aWriter, SCTAG_DOM_SYSTEM_PRINCIPAL, 0);
+  }
+  if (aInfo.type() == PrincipalInfo::TExpandedPrincipalInfo) {
+    const ExpandedPrincipalInfo& expanded = aInfo;
+    if (!JS_WriteUint32Pair(aWriter, SCTAG_DOM_EXPANDED_PRINCIPAL, 0) ||
+        !JS_WriteUint32Pair(aWriter, expanded.allowlist().Length(), 0)) {
+      return false;
+    }
+
+    for (uint32_t i = 0; i < expanded.allowlist().Length(); i++) {
+      if (!WritePrincipalInfo(aWriter, expanded.allowlist()[i])) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  MOZ_ASSERT(aInfo.type() == PrincipalInfo::TContentPrincipalInfo);
+  const ContentPrincipalInfo& cInfo = aInfo;
+  return JS_WriteUint32Pair(aWriter, SCTAG_DOM_CONTENT_PRINCIPAL, 0) &&
+         ::WritePrincipalInfo(aWriter, cInfo.attrs(), cInfo.spec(),
+                              cInfo.originNoSuffix(), cInfo.baseDomain());
+}
+
+bool nsJSPrincipals::write(JSContext* aCx, JSStructuredCloneWriter* aWriter) {
+  PrincipalInfo info;
+  if (NS_WARN_IF(NS_FAILED(PrincipalToPrincipalInfo(this, &info)))) {
+    xpc::Throw(aCx, NS_ERROR_DOM_DATA_CLONE_ERR);
+    return false;
+  }
+
+  return WritePrincipalInfo(aWriter, info);
+}
+
+bool nsJSPrincipals::isSystemOrAddonPrincipal() {
+  JS::AutoSuppressGCAnalysis suppress;
+  return this->IsSystemPrincipal() ||
+         this->GetIsAddonOrExpandedAddonPrincipal();
+}