142 lines
4.4 KiB
C++
142 lines
4.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This code is made available to you under your choice of the following sets
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* of licensing terms:
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*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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/* Copyright 2014 GNU Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef mozilla_pkix_Time_h
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#define mozilla_pkix_Time_h
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#include <stdint.h>
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#include <ctime>
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#include <limits>
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#include "mozpkix/Result.h"
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namespace mozilla {
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namespace pkix {
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// Time with a range from the first second of year 0 (AD) through at least the
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// last second of year 9999, which is the range of legal times in X.509 and
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// OCSP. This type has second-level precision. The time zone is always UTC.
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//
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// Pass by value, not by reference.
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class Time final {
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public:
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// Construct an uninitialized instance.
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//
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// This will fail to compile because there is no default constructor:
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// Time x;
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//
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// This will succeed, leaving the time uninitialized:
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// Time x(Time::uninitialized);
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enum Uninitialized { uninitialized };
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explicit Time(Uninitialized) {}
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bool operator==(const Time& other) const {
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return elapsedSecondsAD == other.elapsedSecondsAD;
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}
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bool operator>(const Time& other) const {
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return elapsedSecondsAD > other.elapsedSecondsAD;
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}
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bool operator>=(const Time& other) const {
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return elapsedSecondsAD >= other.elapsedSecondsAD;
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}
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bool operator<(const Time& other) const {
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return elapsedSecondsAD < other.elapsedSecondsAD;
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}
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bool operator<=(const Time& other) const {
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return elapsedSecondsAD <= other.elapsedSecondsAD;
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}
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Result AddSeconds(uint64_t seconds) {
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if (std::numeric_limits<uint64_t>::max() - elapsedSecondsAD < seconds) {
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return Result::FATAL_ERROR_INVALID_ARGS; // integer overflow
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}
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elapsedSecondsAD += seconds;
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return Success;
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}
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Result SubtractSeconds(uint64_t seconds) {
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if (seconds > elapsedSecondsAD) {
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return Result::FATAL_ERROR_INVALID_ARGS; // integer overflow
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}
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elapsedSecondsAD -= seconds;
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return Success;
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}
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static const uint64_t ONE_DAY_IN_SECONDS =
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UINT64_C(24) * UINT64_C(60) * UINT64_C(60);
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private:
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// This constructor is hidden to prevent accidents like this:
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//
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// Time foo(time_t t)
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// {
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// // WRONG! 1970-01-01-00:00:00 == time_t(0), but not Time(0)!
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// return Time(t);
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// }
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explicit Time(uint64_t aElapsedSecondsAD)
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: elapsedSecondsAD(aElapsedSecondsAD) {}
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friend Time TimeFromElapsedSecondsAD(uint64_t);
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friend class Duration;
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uint64_t elapsedSecondsAD;
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};
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inline Time TimeFromElapsedSecondsAD(uint64_t aElapsedSecondsAD) {
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return Time(aElapsedSecondsAD);
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}
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Time Now();
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// Note the epoch is the unix epoch (ie 00:00:00 UTC, 1 January 1970)
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Time TimeFromEpochInSeconds(uint64_t secondsSinceEpoch);
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// Note the epoch is the unix epoch (ie 00:00:00 UTC, 1 January 1970)
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Result SecondsSinceEpochFromTime(Time time, uint64_t* outSeconds);
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class Duration final {
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public:
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Duration(Time timeA, Time timeB)
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: durationInSeconds(
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timeA < timeB ? timeB.elapsedSecondsAD - timeA.elapsedSecondsAD
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: timeA.elapsedSecondsAD - timeB.elapsedSecondsAD) {}
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explicit Duration(uint64_t aDurationInSeconds)
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: durationInSeconds(aDurationInSeconds) {}
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bool operator>(const Duration& other) const {
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return durationInSeconds > other.durationInSeconds;
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}
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bool operator<(const Duration& other) const {
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return durationInSeconds < other.durationInSeconds;
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}
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private:
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friend Result SecondsSinceEpochFromTime(Time time, uint64_t* outSeconds);
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uint64_t durationInSeconds;
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};
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} // namespace pkix
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} // namespace mozilla
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#endif // mozilla_pkix_Time_h
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