components/sync/base/hash_util.cc

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "components/sync/base/hash_util.h"

#include "base/base64.h"
#include "base/hash/sha1.h"
#include "base/notreached.h"
#include "base/strings/strcat.h"
#include "base/strings/string_number_conversions.h"
#include "components/sync/base/client_tag_hash.h"
#include "components/sync/base/model_type.h"
#include "components/sync/base/unique_position.h"
#include "components/sync/protocol/autofill_offer_specifics.pb.h"
#include "components/sync/protocol/autofill_specifics.pb.h"
#include "components/sync/protocol/entity_specifics.pb.h"

namespace syncer {

std::string GenerateUniquePositionSuffix(const ClientTagHash& client_tag_hash) {
  // TODO(crbug.com/351357559): move this logic closer to UniquePosition class
  // (use ClientTagHash instead of suffixes in API).
  std::string result = base::Base64Encode(
      base::SHA1Hash(base::as_byte_span(client_tag_hash.value())));
  CHECK_EQ(result.size(), UniquePosition::kSuffixLength);
  return result;
}

std::string GetUnhashedClientTagFromAutofillWalletSpecifics(
    const sync_pb::AutofillWalletSpecifics& specifics) {
  switch (specifics.type()) {
    case sync_pb::AutofillWalletSpecifics::MASKED_CREDIT_CARD:
      return specifics.masked_card().id();
    case sync_pb::AutofillWalletSpecifics::POSTAL_ADDRESS:
      return specifics.address().id();
    case sync_pb::AutofillWalletSpecifics::CUSTOMER_DATA:
      return specifics.customer_data().id();
    case sync_pb::AutofillWalletSpecifics::CREDIT_CARD_CLOUD_TOKEN_DATA:
      return specifics.cloud_token_data().instrument_token();
    case sync_pb::AutofillWalletSpecifics::PAYMENT_INSTRUMENT:
      // Append a string to the instrument ID, since the same ID may be used for
      // a MASKED_CREDIT_CARD entry.
      return base::StrCat(
          {"payment_instrument:",
           base::NumberToString(
               specifics.payment_instrument().instrument_id())});
    case sync_pb::AutofillWalletSpecifics::MASKED_IBAN:
      return std::string();
    case sync_pb::AutofillWalletSpecifics::UNKNOWN:
      NOTREACHED_IN_MIGRATION();
      return std::string();
  }
  return std::string();
}

std::string GetUnhashedClientTagFromAutofillOfferSpecifics(
    const sync_pb::AutofillOfferSpecifics& specifics) {
  return base::NumberToString(specifics.id());
}

}  // namespace syncer