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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 ASN1StringTests: 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 testUTF8StringEncoding() throws {
var serializer = DER.Serializer()
let originalString = ASN1UTF8String(contentBytes: [1, 2, 3, 4])
try serializer.serialize(originalString)
XCTAssertEqual(serializer.serializedBytes, [12, 4, 1, 2, 3, 4])
}
func testUTF8StringRoundTrips() throws {
try self.assertRoundTrips(ASN1UTF8String(contentBytes: [1, 2, 3, 4]))
}
func testUTF8StringContiguousBytes() throws {
let string = ASN1UTF8String(contentBytes: [1, 2, 3, 4])
string.withUnsafeBytes { XCTAssertTrue($0.elementsEqual([1, 2, 3, 4])) }
}
func testTeletexStringEncoding() throws {
var serializer = DER.Serializer()
let originalString = ASN1TeletexString(contentBytes: [1, 2, 3, 4])
try serializer.serialize(originalString)
XCTAssertEqual(serializer.serializedBytes, [20, 4, 1, 2, 3, 4])
}
func testTeletexStringRoundTrips() throws {
try self.assertRoundTrips(ASN1TeletexString(contentBytes: [1, 2, 3, 4]))
}
func testTeletexStringContiguousBytes() throws {
let string = ASN1TeletexString(contentBytes: [1, 2, 3, 4])
string.withUnsafeBytes { XCTAssertTrue($0.elementsEqual([1, 2, 3, 4])) }
}
func testPrintableStringEncoding() throws {
var serializer = DER.Serializer()
let originalString = try ASN1PrintableString(contentBytes: [0x54, 0x65, 0x73, 0x74])
try serializer.serialize(originalString)
XCTAssertEqual(serializer.serializedBytes, [19, 4, 0x54, 0x65, 0x73, 0x74])
}
func testPrintableStringRoundTrips() throws {
try self.assertRoundTrips(ASN1PrintableString(contentBytes: [0x54, 0x65, 0x73, 0x74]))
}
func testPrintableStringContiguousBytes() throws {
let string = try ASN1PrintableString(contentBytes: [0x54, 0x65, 0x73, 0x74])
string.withUnsafeBytes { XCTAssertTrue($0.elementsEqual([0x54, 0x65, 0x73, 0x74])) }
}
func testUniversalStringEncoding() throws {
var serializer = DER.Serializer()
let originalString = ASN1UniversalString(contentBytes: [1, 2, 3, 4])
try serializer.serialize(originalString)
XCTAssertEqual(serializer.serializedBytes, [28, 4, 1, 2, 3, 4])
}
func testUniversalStringRoundTrips() throws {
try self.assertRoundTrips(ASN1UniversalString(contentBytes: [1, 2, 3, 4]))
}
func testUniversalStringContiguousBytes() throws {
let string = ASN1UniversalString(contentBytes: [1, 2, 3, 4])
string.withUnsafeBytes { XCTAssertTrue($0.elementsEqual([1, 2, 3, 4])) }
}
func testBMPStringEncoding() throws {
var serializer = DER.Serializer()
let originalString = ASN1BMPString(contentBytes: [1, 2, 3, 4])
try serializer.serialize(originalString)
XCTAssertEqual(serializer.serializedBytes, [30, 4, 1, 2, 3, 4])
}
func testBMPStringRoundTrips() throws {
try self.assertRoundTrips(ASN1BMPString(contentBytes: [1, 2, 3, 4]))
}
func testBMPStringContiguousBytes() throws {
let string = ASN1BMPString(contentBytes: [1, 2, 3, 4])
string.withUnsafeBytes { XCTAssertTrue($0.elementsEqual([1, 2, 3, 4])) }
}
func testUTF8StringCanCreateAString() throws {
let string = "hello, world!"
let utf8String = ASN1UTF8String(string)
let newString = String(utf8String)
XCTAssertEqual(newString, string)
}
func testPrintableStringCanCreateAString() throws {
let string = "hello, world"
let utf8String = try ASN1PrintableString(string)
let newString = String(utf8String)
XCTAssertEqual(newString, string)
}
func testIA5StringCanCreateAString() throws {
let string = "hello, world"
let ia5String = try ASN1IA5String(string)
let newString = String(ia5String)
XCTAssertEqual(newString, string)
}
func testPrintableStringRejectsCharacters() throws {
let allBytes = (UInt8(0)...UInt8.max)
let invalidBytes = (UInt8(0)...UInt8(255)).filter {
switch $0 {
case UInt8(ascii: "a")...UInt8(ascii: "z"),
UInt8(ascii: "A")...UInt8(ascii: "Z"),
UInt8(ascii: "0")...UInt8(ascii: "9"),
UInt8(ascii: "'"), UInt8(ascii: "("),
UInt8(ascii: ")"), UInt8(ascii: "+"),
UInt8(ascii: "-"), UInt8(ascii: "?"),
UInt8(ascii: ":"), UInt8(ascii: "/"),
UInt8(ascii: "="), UInt8(ascii: " "),
UInt8(ascii: ","), UInt8(ascii: "."):
return false
default:
return true
}
}
let validBytes = allBytes.filter { !invalidBytes.contains($0) }
for byte in invalidBytes {
XCTAssertThrowsError(try ASN1PrintableString(contentBytes: [byte]))
XCTAssertThrowsError(try ASN1PrintableString(String(UnicodeScalar(byte))))
XCTAssertThrowsError(try ASN1PrintableString(derEncoded: [0x13, 1, byte]))
}
for byte in validBytes {
XCTAssertNoThrow(try ASN1PrintableString(contentBytes: [byte]))
XCTAssertNoThrow(try ASN1PrintableString(String(UnicodeScalar(byte))))
XCTAssertNoThrow(try ASN1PrintableString(derEncoded: [0x13, 1, byte]))
}
}
func testIA5StringRejectsCharacters() throws {
let invalidBytes = (UInt8(128)...(UInt8.max))
let validBytes = (UInt8(0)..<UInt8(128))
for byte in invalidBytes {
XCTAssertThrowsError(try ASN1IA5String(contentBytes: [byte]))
XCTAssertThrowsError(try ASN1IA5String(String(UnicodeScalar(byte))))
XCTAssertThrowsError(try ASN1IA5String(derEncoded: [0x16, 1, byte]))
}
for byte in validBytes {
XCTAssertNoThrow(try ASN1IA5String(contentBytes: [byte]))
XCTAssertNoThrow(try ASN1IA5String(String(UnicodeScalar(byte))))
XCTAssertNoThrow(try ASN1IA5String(derEncoded: [0x16, 1, byte]))
}
}
}
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