Add m-esr52 at 52.6.0

1 files changed, 299 insertions, 0 deletions

diff --git a/caps/nsJSPrincipals.cpp b/caps/nsJSPrincipals.cpp
new file mode 100644
index 000000000..0f3afa14e
--- /dev/null
+++ b/caps/nsJSPrincipals.cpp
@@ -0,0 +1,299 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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 "xpcpublic.h"
+#include "nsString.h"
+#include "nsIObjectOutputStream.h"
+#include "nsIObjectInputStream.h"
+#include "nsJSPrincipals.h"
+#include "plstr.h"
+#include "nsXPIDLString.h"
+#include "nsCOMPtr.h"
+#include "nsIServiceManager.h"
+#include "nsMemory.h"
+#include "nsStringBuffer.h"
+
+#include "mozilla/dom/StructuredCloneTags.h"
+// for mozilla::dom::workers::kJSPrincipalsDebugToken
+#include "mozilla/dom/workers/Workers.h"
+#include "mozilla/ipc/BackgroundUtils.h"
+
+using namespace mozilla;
+using namespace mozilla::ipc;
+
+NS_IMETHODIMP_(MozExternalRefCountType)
+nsJSPrincipals::AddRef()
+{
+  MOZ_ASSERT(NS_IsMainThread());
+  NS_PRECONDITION(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(NS_IsMainThread());
+  NS_PRECONDITION(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 if (debugToken == dom::workers::kJSPrincipalsDebugToken) {
+        fprintf(stderr, "Web Worker principal singleton (%p)\n", this);
+    } 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
+ReadSuffixAndSpec(JSStructuredCloneReader* aReader,
+                  PrincipalOriginAttributes& aAttrs,
+                  nsACString& aSpec)
+{
+    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;
+    }
+
+    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) {
+        PrincipalOriginAttributes attrs;
+        nsAutoCString dummy;
+        if (!ReadSuffixAndSpec(aReader, attrs, dummy)) {
+            return false;
+        }
+        aInfo = NullPrincipalInfo(attrs);
+    } 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.whitelist().AppendElement(sub);
+        }
+
+        aInfo = expanded;
+    } else if (aTag == SCTAG_DOM_CONTENT_PRINCIPAL) {
+        PrincipalOriginAttributes attrs;
+        nsAutoCString spec;
+        if (!ReadSuffixAndSpec(aReader, attrs, spec)) {
+            return false;
+        }
+
+        aInfo = ContentPrincipalInfo(attrs, void_t(), spec);
+    } else {
+        MOZ_CRASH("unexpected principal structured clone tag");
+    }
+
+    return true;
+}
+
+/* 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);
+
+    if (NS_WARN_IF(!NS_IsMainThread())) {
+        xpc::Throw(aCx, NS_ERROR_UNCATCHABLE_EXCEPTION);
+        return false;
+    }
+
+    PrincipalInfo info;
+    if (!ReadPrincipalInfo(aReader, aTag, info)) {
+        return false;
+    }
+
+    nsresult rv;
+    nsCOMPtr<nsIPrincipal> prin = PrincipalInfoToPrincipal(info, &rv);
+    if (NS_WARN_IF(NS_FAILED(rv))) {
+        xpc::Throw(aCx, NS_ERROR_DOM_DATA_CLONE_ERR);
+        return false;
+    }
+
+    *aOutPrincipals = get(prin.forget().take());
+    return true;
+}
+
+static bool
+WriteSuffixAndSpec(JSStructuredCloneWriter* aWriter,
+                   const PrincipalOriginAttributes& aAttrs,
+                   const nsCString& aSpec)
+{
+  nsAutoCString suffix;
+  aAttrs.CreateSuffix(suffix);
+
+  return JS_WriteUint32Pair(aWriter, suffix.Length(), aSpec.Length()) &&
+         JS_WriteBytes(aWriter, suffix.get(), suffix.Length()) &&
+         JS_WriteBytes(aWriter, aSpec.get(), aSpec.Length());
+}
+
+static bool
+WritePrincipalInfo(JSStructuredCloneWriter* aWriter, const PrincipalInfo& aInfo)
+{
+    if (aInfo.type() == PrincipalInfo::TNullPrincipalInfo) {
+        const NullPrincipalInfo& nullInfo = aInfo;
+        return JS_WriteUint32Pair(aWriter, SCTAG_DOM_NULL_PRINCIPAL, 0) &&
+               WriteSuffixAndSpec(aWriter, nullInfo.attrs(), EmptyCString());
+    }
+    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.whitelist().Length(), 0)) {
+            return false;
+        }
+
+        for (uint32_t i = 0; i < expanded.whitelist().Length(); i++) {
+            if (!WritePrincipalInfo(aWriter, expanded.whitelist()[i])) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    MOZ_ASSERT(aInfo.type() == PrincipalInfo::TContentPrincipalInfo);
+    const ContentPrincipalInfo& cInfo = aInfo;
+    return JS_WriteUint32Pair(aWriter, SCTAG_DOM_CONTENT_PRINCIPAL, 0) &&
+           WriteSuffixAndSpec(aWriter, cInfo.attrs(), cInfo.spec());
+}
+
+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);
+}