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70 lines
3.0 KiB
C++
70 lines
3.0 KiB
C++
// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_CERT_DO_NOTHING_CT_VERIFIER_H_
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#define NET_CERT_DO_NOTHING_CT_VERIFIER_H_
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#include "base/macros.h"
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#include "net/base/net_export.h"
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#include "net/cert/ct_verifier.h"
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namespace net {
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// An implementation of CTVerifier that does not validate SCTs.
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//
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// SECURITY NOTE:
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// As Certificate Transparency is an essential part in safeguarding TLS
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// connections, disabling Certificate Transparency enforcement is a decision
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// that should not be taken lightly, and it should be made an explicit
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// decision rather than a potentially accidental decision (such as allowing
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// for a nullptr instance). By checking Certificate Transparency information,
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// typically via a net::MultiLogCTVerifier, and enforcing policies related
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// to Certificate Transparency provided by a net::CTPolicyEnforcer, developers
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// can help protect their users by ensuring that misissued TLS certificates
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// are detected.
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//
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// However, not every consumer of TLS certificates is using the Web PKI. For
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// example, they may be using connections authenticated out of band, or may
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// be using private or local PKIs for which Certificate Transparency is not
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// relevant. Alternatively, much like how a robust and secure TLS client
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// requires a regularly updated root certificate store, a robust and secure
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// Certificate Transparency client requires regular updates. However, since
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// some clients may not support regular updates, it may be intentional to
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// disable Certificate Transparency and choose a less-secure default
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// behavior.
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//
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// Consumers of this class should generally try to get a security or design
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// to discuss the type of net::X509Certificates they will be validating,
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// and determine whether or not Certificate Transparency is right for the
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// particular use case.
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//
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// Because of the complex nuances related to security tradeoffs, it is
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// expected that classes which expect a CTVerifier will require one to be
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// supplied, forcing the caller to make an intentional and explicit decision
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// about the appropriate security policy, rather than leaving it ambiguous,
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// such as via a nullptr. This class is intended to indicate an intentional
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// consideration of CT, and a decision to not support it.
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class NET_EXPORT DoNothingCTVerifier : public CTVerifier {
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public:
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DoNothingCTVerifier();
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~DoNothingCTVerifier() override;
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void Verify(base::StringPiece hostname,
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X509Certificate* cert,
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base::StringPiece stapled_ocsp_response,
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base::StringPiece sct_list_from_tls_extension,
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SignedCertificateTimestampAndStatusList* output_scts,
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const NetLogWithSource& net_log) override;
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void SetObserver(Observer* observer) override;
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Observer* GetObserver() const override;
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private:
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DISALLOW_COPY_AND_ASSIGN(DoNothingCTVerifier);
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};
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} // namespace net
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#endif // NET_CERT_DO_NOTHING_CT_VERIFIER_H_
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