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//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftASN1 open source project
//
// Copyright (c) 2021 Apple Inc. and the SwiftASN1 project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.txt for the list of SwiftASN1 project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
import XCTest
@testable import SwiftASN1
final class GeneralizedTimeTests: XCTestCase {
private func assertRoundTrips<ASN1Object: DERParseable & DERSerializable & Equatable>(_ value: ASN1Object) throws {
var serializer = DER.Serializer()
try serializer.serialize(value)
let parsed = try ASN1Object(derEncoded: serializer.serializedBytes)
XCTAssertEqual(parsed, value)
}
func testSimpleGeneralizedTimeTestVectors() throws {
// This is a small set of generalized time test vectors derived from the ASN.1 docs.
// We store the byte payload here as a string.
let vectors: [(String, GeneralizedTime?)] = [
// Valid representations
(
"19920521000000Z",
try .init(year: 1992, month: 5, day: 21, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
),
(
"19920622123421Z",
try .init(year: 1992, month: 6, day: 22, hours: 12, minutes: 34, seconds: 21, fractionalSeconds: 0)
),
(
"19920722132100.3Z",
try .init(year: 1992, month: 7, day: 22, hours: 13, minutes: 21, seconds: 0, fractionalSeconds: 0.3)
),
(
"19851106210627.3Z",
try .init(year: 1985, month: 11, day: 6, hours: 21, minutes: 6, seconds: 27, fractionalSeconds: 0.3)
),
(
"19851106210627.14159Z",
try .init(year: 1985, month: 11, day: 6, hours: 21, minutes: 6, seconds: 27, fractionalSeconds: 0.14159)
),
(
"20210131000000Z",
try .init(year: 2021, month: 1, day: 31, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
), // only 31 days in January
(
"20210228000000Z",
try .init(year: 2021, month: 2, day: 28, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
), // only 28 days in February 2021
(
"20200229000000Z",
try .init(year: 2020, month: 2, day: 29, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
), // only 29 days in February 2020
(
"21000228000000Z",
try .init(year: 2100, month: 2, day: 28, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
), // only 28 days in February 2100
(
"20000229000000Z",
try .init(year: 2000, month: 2, day: 29, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
), // only 29 days in February 2000
(
"20210331000000Z",
try .init(year: 2021, month: 3, day: 31, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
), // only 31 days in March
(
"20210430000000Z",
try .init(year: 2021, month: 4, day: 30, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
), // only 30 days in April
(
"20210531000000Z",
try .init(year: 2021, month: 5, day: 31, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
), // only 31 days in May
(
"20210630000000Z",
try .init(year: 2021, month: 6, day: 30, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
), // only 30 days in June
(
"20210731000000Z",
try .init(year: 2021, month: 7, day: 31, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
), // only 31 days in July
(
"20210831000000Z",
try .init(year: 2021, month: 8, day: 31, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
), // only 31 days in August
(
"20210930000000Z",
try .init(year: 2021, month: 9, day: 30, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
), // only 30 days in September
(
"20211031000000Z",
try .init(year: 2021, month: 10, day: 31, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
), // only 31 days in October
(
"20211130000000Z",
try .init(year: 2021, month: 11, day: 30, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
), // only 30 days in November
(
"20211231000000Z",
try .init(year: 2021, month: 12, day: 31, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 0)
), // only 31 days in December
// Invalid representations
("19920520240000Z", nil), // midnight may not be 2400000
("19920622123421.0Z", nil), // spurious trailing zeros
("19920722132100.30Z", nil), // spurious trailing zeros
("19851106210627,3Z", nil), // comma as decimal separator
("1985110621.14159Z", nil), // missing minutes and seconds
("198511062106.14159Z", nil), // missing seconds
("19851106210627.3", nil), // missing trailing Z
("19851106210627.3-0500", nil), // explicit time zone
("20211300000000Z", nil), // there is no 13th month
("20210000000000Z", nil), // there is no zeroth month
("20210100000000Z", nil), // there is no zeroth day
("20210101000062Z", nil), // 62nd second is not allowed
("20210101236000Z", nil), // 60th minute is not allowed
("20210132000000Z", nil), // only 31 days in January
("20210229000000Z", nil), // only 28 days in February 2021
("20200230000000Z", nil), // only 29 days in February 2020
("21000229000000Z", nil), // only 28 days in February 2100
("20000230000000Z", nil), // only 29 days in February 2000
("20210332000000Z", nil), // only 31 days in March
("20210431000000Z", nil), // only 30 days in April
("20210532000000Z", nil), // only 31 days in May
("20210631000000Z", nil), // only 30 days in June
("20210732000000Z", nil), // only 31 days in July
("20210832000000Z", nil), // only 31 days in August
("20210931000000Z", nil), // only 30 days in September
("20211032000000Z", nil), // only 31 days in October
("20211131000000Z", nil), // only 30 days in November
("20211232000000Z", nil), // only 31 days in December
("20200101000000.9223372036854775808Z", nil), // Fractional part will overflow a 64-bit integer by adding
]
for (stringRepresentation, expectedResult) in vectors {
var serialized = [UInt8]()
serialized.writeIdentifier(ASN1Identifier.generalizedTime, constructed: false)
serialized.append(UInt8(stringRepresentation.utf8.count))
serialized.append(contentsOf: stringRepresentation.utf8)
let result = try? GeneralizedTime(derEncoded: serialized)
XCTAssertEqual(result, expectedResult)
if let expected = expectedResult {
try self.assertRoundTrips(expected)
}
}
}
func testCreatingOutOfBoundsValuesViaInitFails() throws {
func mustFail(_ code: @autoclosure () throws -> GeneralizedTime) {
XCTAssertThrowsError(try code())
}
// Invalid year, negative
mustFail(try .init(year: -1, month: 1, day: 1, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// Invalid month, zero.
mustFail(try .init(year: 2000, month: 0, day: 1, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// Invalid month, negative.
mustFail(try .init(year: 2000, month: -1, day: 1, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// Invalid month, too large.
mustFail(try .init(year: 2000, month: 13, day: 1, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// Invalid day, zero.
mustFail(try .init(year: 2000, month: 1, day: 0, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// Invalid day, negative.
mustFail(try .init(year: 2000, month: 1, day: -1, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// only 31 days in January
mustFail(try .init(year: 2000, month: 1, day: 32, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// only 28 days in February 2021
mustFail(try .init(year: 2021, month: 2, day: 29, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// only 29 days in February 2020
mustFail(try .init(year: 2020, month: 2, day: 30, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// only 28 days in February 2100
mustFail(try .init(year: 2100, month: 2, day: 29, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// only 29 days in February 2000
mustFail(try .init(year: 2000, month: 2, day: 30, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// only 31 days in March
mustFail(try .init(year: 2000, month: 3, day: 32, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// only 30 days in April
mustFail(try .init(year: 2000, month: 4, day: 31, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// only 31 days in May
mustFail(try .init(year: 2000, month: 5, day: 32, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// only 30 days in June
mustFail(try .init(year: 2000, month: 6, day: 31, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// only 31 days in July
mustFail(try .init(year: 2000, month: 7, day: 32, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// only 31 days in August
mustFail(try .init(year: 2000, month: 8, day: 32, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// only 30 days in September
mustFail(try .init(year: 2000, month: 9, day: 31, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// only 31 days in October
mustFail(try .init(year: 2000, month: 10, day: 32, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// only 30 days in November
mustFail(try .init(year: 2000, month: 11, day: 31, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// only 31 days in December
mustFail(try .init(year: 2000, month: 11, day: 32, hours: 1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// Invalid hour, negative
mustFail(try .init(year: 2000, month: 1, day: 1, hours: -1, minutes: 1, seconds: 1, fractionalSeconds: 0))
// Invalid hour, 24
mustFail(try .init(year: 2000, month: 1, day: 1, hours: 24, minutes: 0, seconds: 0, fractionalSeconds: 0))
// Invalid minute, negative
mustFail(try .init(year: 2000, month: 1, day: 1, hours: 0, minutes: -1, seconds: 1, fractionalSeconds: 0))
// Invalid minute, 60
mustFail(try .init(year: 2000, month: 1, day: 1, hours: 0, minutes: 60, seconds: 0, fractionalSeconds: 0))
// Invalid second, negative
mustFail(try .init(year: 2000, month: 1, day: 1, hours: 0, minutes: 0, seconds: -1, fractionalSeconds: 0))
// Invalid second, 62 (we allow some leap seconds)
mustFail(try .init(year: 2000, month: 1, day: 1, hours: 0, minutes: 0, seconds: 62, fractionalSeconds: 0))
// Invalid fractional seconds, negative
mustFail(try .init(year: 2000, month: 1, day: 1, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: -0.5))
// Invalid fractional seconds, greater than one
mustFail(try .init(year: 2000, month: 1, day: 1, hours: 0, minutes: 0, seconds: 0, fractionalSeconds: 1.1))
}
func testTruncatedRepresentationsRejected() throws {
func mustNotDeserialize(_ stringRepresentation: Substring) {
var serialized = [UInt8]()
serialized.writeIdentifier(ASN1Identifier.generalizedTime, constructed: false)
serialized.append(UInt8(stringRepresentation.utf8.count))
serialized.append(contentsOf: stringRepresentation.utf8)
XCTAssertThrowsError(try GeneralizedTime(derEncoded: serialized))
}
func deserializes(_ stringRepresentation: Substring) {
var serialized = [UInt8]()
serialized.writeIdentifier(ASN1Identifier.generalizedTime, constructed: false)
serialized.append(UInt8(stringRepresentation.utf8.count))
serialized.append(contentsOf: stringRepresentation.utf8)
XCTAssertNoThrow(try GeneralizedTime(derEncoded: serialized))
}
// Anything that doesn't end up in a Z must fail to deserialize.
let string = Substring("19851106210627.14159Z")
for distance in 0..<string.count {
let sliced = string.prefix(distance)
mustNotDeserialize(sliced)
}
deserializes(string)
// Adding some excess data should fail too.
for junkByteCount in 1...string.count {
let junked = string + string.prefix(junkByteCount)
mustNotDeserialize(junked)
}
}
func testRequiresAppropriateTag() throws {
let rawValue = "19920521000000Z".utf8
var invalidBytes = [UInt8]()
invalidBytes.writeIdentifier(ASN1Identifier.integer, constructed: false) // generalizedTime isn't an integer
invalidBytes.append(UInt8(rawValue.count))
invalidBytes.append(contentsOf: rawValue)
XCTAssertThrowsError(try GeneralizedTime(derEncoded: invalidBytes))
}
func testComparisons() throws {
enum ExpectedComparisonResult {
case lessThan
case equal
case greaterThan
}
let original = try GeneralizedTime(
year: 2020,
month: 03,
day: 03,
hours: 03,
minutes: 03,
seconds: 03,
fractionalSeconds: 0.105
)
func modify<Modifiable: AdditiveArithmetic>(
_ field: WritableKeyPath<GeneralizedTime, Modifiable>,
of time: GeneralizedTime,
by modifier: Modifiable
) -> GeneralizedTime {
var copy = time
copy[keyPath: field] += modifier
return copy
}
let integerTransformable: [WritableKeyPath<GeneralizedTime, Int>] = [
\.year, \.month, \.day, \.hours, \.minutes, \.seconds,
]
var transformationsAndResults: [(GeneralizedTime, ExpectedComparisonResult)] = []
transformationsAndResults.append((original, .equal))
for transform in integerTransformable {
transformationsAndResults.append((modify(transform, of: original, by: 1), .greaterThan))
transformationsAndResults.append((modify(transform, of: original, by: -1), .lessThan))
}
transformationsAndResults.append((modify(\.fractionalSeconds, of: original, by: 0.1), .greaterThan))
transformationsAndResults.append((modify(\.fractionalSeconds, of: original, by: -0.1), .lessThan))
transformationsAndResults.append(
(
try GeneralizedTime(
year: 2019,
month: 08,
day: 08,
hours: 08,
minutes: 08,
seconds: 08,
fractionalSeconds: 0.205
),
.lessThan
)
)
for (newValue, expectedResult) in transformationsAndResults {
switch expectedResult {
case .lessThan:
XCTAssertLessThan(newValue, original)
XCTAssertLessThanOrEqual(newValue, original)
XCTAssertGreaterThan(original, newValue)
XCTAssertGreaterThanOrEqual(original, newValue)
case .equal:
XCTAssertGreaterThanOrEqual(newValue, original)
XCTAssertGreaterThanOrEqual(original, newValue)
XCTAssertLessThanOrEqual(newValue, original)
XCTAssertLessThanOrEqual(original, newValue)
case .greaterThan:
XCTAssertGreaterThan(newValue, original)
XCTAssertGreaterThanOrEqual(newValue, original)
XCTAssertLessThan(original, newValue)
XCTAssertLessThanOrEqual(original, newValue)
}
}
}
}
|
