OffThreadCSPContext.h

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/* 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/. */

#ifndef mozilla_dom_OffThreadCSPContext_h_

#define mozilla_dom_OffThreadCSPContext_h_

#include "mozilla/Result.h"

#include "mozilla/UniquePtr.h"

#include "mozilla/dom/nsCSPUtils.h"

#include "mozilla/ipc/PBackgroundSharedTypes.h"

#include "nscore.h"

class nsIContentSecurityPolicy;

namespace mozilla::dom {

// A minimal version of nsCSPContext that can run on worker and worklet threads.

class OffThreadCSPContext final {

 public:

  explicit OffThreadCSPContext(mozilla::ipc::CSPInfo&& aInfo)

      : mCSPInfo(aInfo) {}

  static Result<UniquePtr<OffThreadCSPContext>, nsresult> CreateFromCSP(

      nsIContentSecurityPolicy* aCSP);

  const mozilla::ipc::CSPInfo& CSPInfo() const { return mCSPInfo; }

  const nsTArray<UniquePtr<const nsCSPPolicy>>& Policies();

  bool IsEvalAllowed(bool& aReportViolation);

  bool IsWasmEvalAllowed(bool& aReportViolation);

 private:

  void EnsureIPCPoliciesRead();

  // Thread boundaries require us to not only store a CSP object, but also a

  // serialized version of the CSP. Reason being: Serializing a CSP to a CSPInfo

  // needs to happen on the main thread, but storing the CSPInfo needs to happen

  // on the worker/worklet thread.

  mozilla::ipc::CSPInfo mCSPInfo;

  // This is created lazily by parsing the policies in CSPInfo on the

  // worker/worklet thread.

  nsTArray<UniquePtr<const nsCSPPolicy>> mPolicies;

};

}  // namespace mozilla::dom

#endif  // mozilla_dom_OffThreadCSPContext_h_