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Diffstat (limited to '')
-rw-r--r-- | security/nss/lib/mozpkix/include/pkix/Time.h | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/security/nss/lib/mozpkix/include/pkix/Time.h b/security/nss/lib/mozpkix/include/pkix/Time.h new file mode 100644 index 0000000000..5402430370 --- /dev/null +++ b/security/nss/lib/mozpkix/include/pkix/Time.h @@ -0,0 +1,142 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This code is made available to you under your choice of the following sets + * of licensing terms: + */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + */ +/* Copyright 2014 Mozilla Contributors + * + * 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 mozilla_pkix_Time_h +#define mozilla_pkix_Time_h + +#include <stdint.h> +#include <ctime> +#include <limits> + +#include "mozpkix/Result.h" + +namespace mozilla { +namespace pkix { + +// Time with a range from the first second of year 0 (AD) through at least the +// last second of year 9999, which is the range of legal times in X.509 and +// OCSP. This type has second-level precision. The time zone is always UTC. +// +// Pass by value, not by reference. +class Time final { + public: + // Construct an uninitialized instance. + // + // This will fail to compile because there is no default constructor: + // Time x; + // + // This will succeed, leaving the time uninitialized: + // Time x(Time::uninitialized); + enum Uninitialized { uninitialized }; + explicit Time(Uninitialized) {} + + bool operator==(const Time& other) const { + return elapsedSecondsAD == other.elapsedSecondsAD; + } + bool operator>(const Time& other) const { + return elapsedSecondsAD > other.elapsedSecondsAD; + } + bool operator>=(const Time& other) const { + return elapsedSecondsAD >= other.elapsedSecondsAD; + } + bool operator<(const Time& other) const { + return elapsedSecondsAD < other.elapsedSecondsAD; + } + bool operator<=(const Time& other) const { + return elapsedSecondsAD <= other.elapsedSecondsAD; + } + + Result AddSeconds(uint64_t seconds) { + if (std::numeric_limits<uint64_t>::max() - elapsedSecondsAD < seconds) { + return Result::FATAL_ERROR_INVALID_ARGS; // integer overflow + } + elapsedSecondsAD += seconds; + return Success; + } + + Result SubtractSeconds(uint64_t seconds) { + if (seconds > elapsedSecondsAD) { + return Result::FATAL_ERROR_INVALID_ARGS; // integer overflow + } + elapsedSecondsAD -= seconds; + return Success; + } + + static const uint64_t ONE_DAY_IN_SECONDS = + UINT64_C(24) * UINT64_C(60) * UINT64_C(60); + + private: + // This constructor is hidden to prevent accidents like this: + // + // Time foo(time_t t) + // { + // // WRONG! 1970-01-01-00:00:00 == time_t(0), but not Time(0)! + // return Time(t); + // } + explicit Time(uint64_t aElapsedSecondsAD) + : elapsedSecondsAD(aElapsedSecondsAD) {} + friend Time TimeFromElapsedSecondsAD(uint64_t); + friend class Duration; + + uint64_t elapsedSecondsAD; +}; + +inline Time TimeFromElapsedSecondsAD(uint64_t aElapsedSecondsAD) { + return Time(aElapsedSecondsAD); +} + +Time Now(); + +// Note the epoch is the unix epoch (ie 00:00:00 UTC, 1 January 1970) +Time TimeFromEpochInSeconds(uint64_t secondsSinceEpoch); + +// Note the epoch is the unix epoch (ie 00:00:00 UTC, 1 January 1970) +Result SecondsSinceEpochFromTime(Time time, uint64_t* outSeconds); + +class Duration final { + public: + Duration(Time timeA, Time timeB) + : durationInSeconds( + timeA < timeB ? timeB.elapsedSecondsAD - timeA.elapsedSecondsAD + : timeA.elapsedSecondsAD - timeB.elapsedSecondsAD) {} + + explicit Duration(uint64_t aDurationInSeconds) + : durationInSeconds(aDurationInSeconds) {} + + bool operator>(const Duration& other) const { + return durationInSeconds > other.durationInSeconds; + } + bool operator<(const Duration& other) const { + return durationInSeconds < other.durationInSeconds; + } + + private: + friend Result SecondsSinceEpochFromTime(Time time, uint64_t* outSeconds); + + uint64_t durationInSeconds; +}; +} // namespace pkix +} // namespace mozilla + +#endif // mozilla_pkix_Time_h |