https://github.com/google/tink
Tip revision: 1f4cd38874ec0be85f5aa55ba86d95d18c3fd965 authored by Copybara-Service on 17 April 2024, 10:22:21 UTC
Merge pull request #735 from tink-crypto:dependabot/pip/python/examples/idna-3.7
Merge pull request #735 from tink-crypto:dependabot/pip/python/examples/idna-3.7
Tip revision: 1f4cd38
big_integer.h
// Copyright 2023 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
//
// 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.
//
////////////////////////////////////////////////////////////////////////////////
#ifndef TINK_BIG_INTEGER_H_
#define TINK_BIG_INTEGER_H_
#include <cstdint>
#include <string>
#include "absl/strings/string_view.h"
namespace crypto {
namespace tink {
// Stores a BigInteger value as a big endian encoded string. Removes leading
// zeros prior to creation. This class is particularly useful for working with
// certain primitives which use big integers types for the parameters and key
// material.
class BigInteger {
public:
// Copyable and movable.
BigInteger(const BigInteger& other) = default;
BigInteger& operator=(const BigInteger& other) = default;
BigInteger(BigInteger&& other) = default;
BigInteger& operator=(BigInteger&& other) = default;
// Creates a new BigInteger object that wraps a big endian encoded
// string and removes leading zeros.
explicit BigInteger(absl::string_view big_integer);
// Returns the value of this BigInteger object.
absl::string_view GetValue() const { return value_; }
int64_t SizeInBytes() const { return value_.size(); }
// Constant-time comparison operators.
bool operator==(const BigInteger& other) const;
bool operator!=(const BigInteger& other) const { return !(*this == other); }
private:
std::string value_;
};
} // namespace tink
} // namespace crypto
#endif // TINK_BIG_INTEGER_H_