| // Copyright 2019 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "revocation_util.h" |
| |
| #include "encode_values.h" |
| #include "parse_values.h" |
| |
| namespace bssl { |
| |
| namespace { |
| |
| constexpr int64_t kMinValidTime = -62167219200; // 0000-01-01 00:00:00 UTC |
| constexpr int64_t kMaxValidTime = 253402300799; // 9999-12-31 23:59:59 UTC |
| |
| } // namespace |
| |
| bool CheckRevocationDateValid(const der::GeneralizedTime &this_update, |
| const der::GeneralizedTime *next_update, |
| int64_t verify_time_epoch_seconds, |
| std::optional<int64_t> max_age_seconds) { |
| if (verify_time_epoch_seconds > kMaxValidTime || |
| verify_time_epoch_seconds < kMinValidTime || |
| (max_age_seconds.has_value() && |
| (max_age_seconds.value() > kMaxValidTime || |
| max_age_seconds.value() < 0))) { |
| return false; |
| } |
| der::GeneralizedTime verify_time; |
| if (!der::EncodePosixTimeAsGeneralizedTime(verify_time_epoch_seconds, |
| &verify_time)) { |
| return false; |
| } |
| |
| if (this_update > verify_time) { |
| return false; // Response is not yet valid. |
| } |
| |
| if (next_update && (*next_update <= verify_time)) { |
| return false; // Response is no longer valid. |
| } |
| |
| if (max_age_seconds.has_value()) { |
| der::GeneralizedTime earliest_this_update; |
| if (!der::EncodePosixTimeAsGeneralizedTime( |
| verify_time_epoch_seconds - max_age_seconds.value(), |
| &earliest_this_update)) { |
| return false; |
| } |
| if (this_update < earliest_this_update) { |
| return false; // Response is too old. |
| } |
| } |
| |
| return true; |
| } |
| |
| } // namespace bssl |
