Add a ServerProofVerifier interface to QUIC.
This is a server-side equivalent of ProofVerifier. It is used to verify a
client's certificate chain. It will only be used when the server needs to
request client certificates.
ServerProofVerifier drops the VerifyProof() function (not used in TLS 1.3) and
the |hostname|, |ocsp_response|, and |cert_sct| parameters of VerifyCertChain()
(those aren't really meaningful to a server).
See go/quic-tls-client-certificates for the full design doc and context.
gfe-relnote: no functional changes (only adds an interface).
PiperOrigin-RevId: 291429810
Change-Id: Ifd7deb6e72294b2626572b6555e3b5e2976b286e
diff --git a/quic/core/crypto/server_proof_verifier.h b/quic/core/crypto/server_proof_verifier.h
new file mode 100644
index 0000000..94fe131
--- /dev/null
+++ b/quic/core/crypto/server_proof_verifier.h
@@ -0,0 +1,42 @@
+// Copyright (c) 2020 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef QUICHE_QUIC_CORE_CRYPTO_SERVER_PROOF_VERIFIER_H_
+#define QUICHE_QUIC_CORE_CRYPTO_SERVER_PROOF_VERIFIER_H_
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "net/third_party/quiche/src/quic/core/crypto/proof_verifier.h"
+#include "net/third_party/quiche/src/quic/core/quic_types.h"
+
+namespace quic {
+
+// A ServerProofVerifier checks the certificate chain presented by a client.
+class QUIC_EXPORT_PRIVATE ServerProofVerifier {
+ public:
+ virtual ~ServerProofVerifier() {}
+
+ // VerifyCertChain checks that |certs| is a valid chain. On success, it
+ // returns QUIC_SUCCESS. On failure, it returns QUIC_FAILURE and sets
+ // |*error_details| to a description of the problem. In either case it may set
+ // |*details|, which the caller takes ownership of.
+ //
+ // |context| specifies an implementation specific struct (which may be nullptr
+ // for some implementations) that provides useful information for the
+ // verifier, e.g. logging handles.
+ //
+ // This function may also return QUIC_PENDING, in which case the
+ // ServerProofVerifier will call back, on the original thread, via |callback|
+ // when complete. In this case, the ServerProofVerifier will take ownership of
+ // |callback|.
+ virtual QuicAsyncStatus VerifyCertChain(
+ const std::vector<std::string>& certs,
+ std::string* error_details,
+ std::unique_ptr<ProofVerifierCallback> callback) = 0;
+};
+
+} // namespace quic
+#endif // QUICHE_QUIC_CORE_CRYPTO_SERVER_PROOF_VERIFIER_H_
