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// Copyright 2024 Huawei Cloud Computing Technology Co., Ltd.
//
// 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
//
// http://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.
#include "src/buildtool/crypto/hash_info.hpp"
#include "fmt/core.h"
#include "gsl/gsl" // Ensures
#include "src/buildtool/common/protocol_traits.hpp"
#include "src/buildtool/crypto/hasher.hpp"
#include "src/utils/cpp/hex_string.hpp"
namespace {
inline constexpr auto kSHA1EmptyGitBlobHash =
"e69de29bb2d1d6434b8b29ae775ad8c2e48c5391";
} // namespace
HashInfo::HashInfo() noexcept
: hash_{kSHA1EmptyGitBlobHash},
hash_type_{HashFunction::Type::GitSHA1},
is_tree_{false} {}
auto HashInfo::Create(HashFunction::Type type,
std::string hash,
bool is_tree) noexcept
-> expected<HashInfo, std::string> {
if (auto error = HashInfo::ValidateInput(type, hash, is_tree)) {
return unexpected{*std::move(error)};
}
return HashInfo(std::move(hash), type, is_tree);
}
auto HashInfo::HashData(HashFunction hash_function,
std::string const& content,
bool is_tree) noexcept -> HashInfo {
auto const hash_digest = is_tree ? hash_function.HashTreeData(content)
: hash_function.HashBlobData(content);
return HashInfo{
hash_digest.HexString(),
hash_function.GetType(),
is_tree and ProtocolTraits::IsTreeAllowed(hash_function.GetType())};
}
auto HashInfo::HashFile(HashFunction hash_function,
std::filesystem::path const& path,
bool is_tree) noexcept
-> std::optional<std::pair<HashInfo, std::uintmax_t>> {
auto const hash_digest = is_tree ? hash_function.HashTreeFile(path)
: hash_function.HashBlobFile(path);
if (not hash_digest) {
return std::nullopt;
}
return std::pair{HashInfo{hash_digest->first.HexString(),
hash_function.GetType(),
is_tree and hash_function.GetType() ==
HashFunction::Type::GitSHA1},
hash_digest->second};
}
auto HashInfo::operator==(HashInfo const& other) const noexcept -> bool {
return hash_ == other.hash_ and is_tree_ == other.is_tree_;
}
auto HashInfo::ValidateInput(HashFunction::Type type,
std::string const& hash,
bool is_tree) noexcept
-> std::optional<std::string> {
if (is_tree and not ProtocolTraits::IsTreeAllowed(type)) {
return fmt::format(
"HashInfo: hash {} is expected to be {}.\nTrees are "
"not allowed in this mode.",
hash,
ToString(type));
}
if (auto const exp_size = HashFunction{type}.MakeHasher().GetHashLength();
hash.size() != exp_size) {
return fmt::format(
"HashInfo: hash {} is expected to be {}.\n It must have a length "
"of {}, but its length is {}.",
hash,
ToString(type),
exp_size,
hash.size());
}
if (not IsHexString(hash)) {
return fmt::format("HashInfo: Invalid hash {}", hash);
}
return std::nullopt;
}
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