Revert "Certificate Transparency: Code for unpacking EV cert hashes whitelist"

net/cert/ct_ev_whitelist.h

-// Copyright 2014 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 NET_CERT_CT_EV_WHITELIST_H_
-#define NET_CERT_CT_EV_WHITELIST_H_
-
-#include <set>
-#include <string>
-
-#include "base/files/file_path.h"
-#include "net/base/net_export.h"
-
-namespace net {
-
-namespace ct {
-
-namespace internal {
-
-// Abstraction over a stream of bits, to be read independently
-// of the bytes they're packed into. Bits are read MSB-first from the stream.
-// It is limited to 64-bit reads and is inefficient as a design choice - Since
-// it is used infrequently to unpack the Golomb-coded EV certificate hashes
-// whitelist in a blocking thread.
-//
-// This class is declared here so it can be tested.
-class NET_EXPORT_PRIVATE BitStreamReader {
- public:
-  BitStreamReader(const char* source, size_t length);
-
-  // Reads unary-encoded number into |out|. Returns true if
-  // there was at least one bit to read, false otherwise.
-  bool ReadUnaryEncoding(uint64* out);
-  // Reads |num_bits| (up to 64) into |out|. |out| is filled from the MSB to the
-  // LSB. If |num_bits| is less than 64, the most significant |64 - num_bits|
-  // bits are unused and left as zeros. Returns true if the stream had the
-  // requested |num_bits|, false otherwise.
-  bool ReadBits(uint8 num_bits, uint64* out);
-  // Returns the number of bits left in the stream.
-  uint64 BitsLeft() const;
-
- private:
-  // Reads a single bit. Within a byte, the bits are read from the MSB to the
-  // LSB.
-  uint8 ReadBit();
-
-  const char* const source_;
-  const size_t length_;
-
-  // Index of the byte currently being read from.
-  uint64 current_byte_;
-  // Index of the last bit read within |current_byte_|. Since bits are read
-  // from the MSB to the LSB, this value is initialized to 7 and decremented
-  // after each read.
-  int8 current_bit_;
-};
-
-// Given a Golomb-coded list of hashes in |compressed_whitelist|, unpack into
-// |uncompressed_list|. Returns true if the format of the compressed whitelist
-// is valid, false otherwise.
-NET_EXPORT_PRIVATE bool UncompressEVWhitelist(
-    const std::string& compressed_whitelist,
-    std::set<std::string>* uncompressed_list);
-
-// Sets the given |ev_whitelist| into the global context.
-// Note that |ev_whitelist| will contain the old EV whitelist data after this
-// call as the implementation is using set::swap() to efficiently switch the
-// sets.
-NET_EXPORT_PRIVATE void SetEVWhitelistData(std::set<std::string>& ev_whitelist);
-
-}  // namespace internal
-
-// Sets the global EV certificate hashes whitelist from
-// |compressed_whitelist_file| in the global context, after uncompressing it.
-// If the data in |compressed_whitelist_file| is not a valid compressed
-// whitelist, does nothing.
-NET_EXPORT void SetEVWhitelistFromFile(
-    const base::FilePath& compressed_whitelist_file);
-
-// Returns true if the |certificate_hash| appears in the EV certificate hashes
-// whitelist.
-NET_EXPORT bool IsCertificateHashInWhitelist(
-    const std::string& certificate_hash);
-
-// Returns true if the global EV certificate hashes whitelist is non-empty,
-// false otherwise.
-NET_EXPORT bool HasValidEVWhitelist();
-
-}  // namespace ct
-
-}  // namespace net
-
-#endif  // NET_CERT_CT_EV_WHITELIST_H_