text: // Copyright (c) 2013 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_COMMON_CERT_SET_H_
  #define QUICHE_QUIC_CORE_CRYPTO_COMMON_CERT_SET_H_
  
  #include <cstdint>
  
  #include "quic/core/crypto/crypto_protocol.h"
  #include "quic/platform/api/quic_export.h"
  #include "common/platform/api/quiche_string_piece.h"
  
  namespace quic {
  
  // CommonCertSets is an interface to an object that contains a number of common
  // certificate sets and can match against them.
  class QUIC_EXPORT_PRIVATE CommonCertSets {
   public:
    virtual ~CommonCertSets();
  
    // GetInstanceQUIC returns the standard QUIC common certificate sets.
    static const CommonCertSets* GetInstanceQUIC();
  
    // GetCommonHashes returns a quiche::QuicheStringPiece containing the hashes
    // of common sets supported by this object. The 64-bit hashes are concatenated
    // in the quiche::QuicheStringPiece.
    virtual quiche::QuicheStringPiece GetCommonHashes() const = 0;
  
    // GetCert returns a specific certificate (at index |index|) in the common
    // set identified by |hash|. If no such certificate is known, an empty
    // quiche::QuicheStringPiece is returned.
    virtual quiche::QuicheStringPiece GetCert(uint64_t hash,
                                              uint32_t index) const = 0;
  
    // MatchCert tries to find |cert| in one of the common certificate sets
    // identified by |common_set_hashes|. On success it puts the hash of the
    // set in |out_hash|, the index of |cert| in the set in |out_index| and
    // returns true. Otherwise it returns false.
    virtual bool MatchCert(quiche::QuicheStringPiece cert,
                           quiche::QuicheStringPiece common_set_hashes,
                           uint64_t* out_hash,
                           uint32_t* out_index) const = 0;
  };
  
  }  // namespace quic
  
  #endif  // QUICHE_QUIC_CORE_CRYPTO_COMMON_CERT_SET_H_
  