// Copyright 2026 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

#ifndef THIRD_PARTY_CREDENTIO_FORMATS_ZIP_HASHER_DATA_H_
#define THIRD_PARTY_CREDENTIO_FORMATS_ZIP_HASHER_DATA_H_

#include <cstdint>

#include "absl/base/nullability.h"
#include "absl/status/statusor.h"
#include "absl/types/span.h"
#include "crypto/algorithms.h"
#include "formats/zip/reader.h"
#include "proto/collection_data_hash_assertion.pb.h"
#include "riegeli/bytes/reader.h"

namespace credentio {

// Produces a "template" CollectionDataHashAssertion. This assertion will have
// the same contents as an assertion produced by DigestCollectionDataHash,
// except for the specific hash value for each file in the ZIP archive.
absl::StatusOr<CollectionDataHashAssertion> CollectionDataHashTemplate(
    absl::Span<const ZipReader::FileEntry> file_entries, HashAlgorithm alg);

// Creates a CollectionDataHashAssertion for the given asset.
absl::StatusOr<CollectionDataHashAssertion> DigestCollectionDataHash(
    riegeli::Reader* absl_nonnull source, HashAlgorithm alg,
    absl::Span<const ZipReader::FileEntry> file_entries,
    uint64_t central_directory_offset);

}  // namespace credentio

#endif  // THIRD_PARTY_CREDENTIO_FORMATS_ZIP_HASHER_DATA_H_