334 lines
10 KiB
Go
334 lines
10 KiB
Go
// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cryptobyte
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import (
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"bytes"
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encoding_asn1 "encoding/asn1"
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"math/big"
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"reflect"
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"testing"
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"time"
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"golang.org/x/crypto/cryptobyte/asn1"
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)
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type readASN1Test struct {
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name string
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in []byte
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tag asn1.Tag
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ok bool
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out interface{}
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}
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var readASN1TestData = []readASN1Test{
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{"valid", []byte{0x30, 2, 1, 2}, 0x30, true, []byte{1, 2}},
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{"truncated", []byte{0x30, 3, 1, 2}, 0x30, false, nil},
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{"zero length of length", []byte{0x30, 0x80}, 0x30, false, nil},
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{"invalid long form length", []byte{0x30, 0x81, 1, 1}, 0x30, false, nil},
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{"non-minimal length", append([]byte{0x30, 0x82, 0, 0x80}, make([]byte, 0x80)...), 0x30, false, nil},
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{"invalid tag", []byte{0xa1, 3, 0x4, 1, 1}, 31, false, nil},
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{"high tag", []byte{0x1f, 0x81, 0x80, 0x01, 2, 1, 2}, 0xff /* actually 0x4001, but tag is uint8 */, false, nil},
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}
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func TestReadASN1(t *testing.T) {
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for _, test := range readASN1TestData {
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t.Run(test.name, func(t *testing.T) {
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var in, out String = test.in, nil
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ok := in.ReadASN1(&out, test.tag)
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if ok != test.ok || ok && !bytes.Equal(out, test.out.([]byte)) {
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t.Errorf("in.ReadASN1() = %v, want %v; out = %v, want %v", ok, test.ok, out, test.out)
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}
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})
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}
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}
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func TestReadASN1Optional(t *testing.T) {
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var empty String
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var present bool
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ok := empty.ReadOptionalASN1(nil, &present, 0xa0)
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if !ok || present {
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t.Errorf("empty.ReadOptionalASN1() = %v, want true; present = %v want false", ok, present)
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}
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var in, out String = []byte{0xa1, 3, 0x4, 1, 1}, nil
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ok = in.ReadOptionalASN1(&out, &present, 0xa0)
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if !ok || present {
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t.Errorf("in.ReadOptionalASN1() = %v, want true, present = %v, want false", ok, present)
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}
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ok = in.ReadOptionalASN1(&out, &present, 0xa1)
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wantBytes := []byte{4, 1, 1}
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if !ok || !present || !bytes.Equal(out, wantBytes) {
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t.Errorf("in.ReadOptionalASN1() = %v, want true; present = %v, want true; out = %v, want = %v", ok, present, out, wantBytes)
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}
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}
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var optionalOctetStringTestData = []struct {
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readASN1Test
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present bool
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}{
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{readASN1Test{"empty", []byte{}, 0xa0, true, []byte{}}, false},
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{readASN1Test{"invalid", []byte{0xa1, 3, 0x4, 2, 1}, 0xa1, false, []byte{}}, true},
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{readASN1Test{"missing", []byte{0xa1, 3, 0x4, 1, 1}, 0xa0, true, []byte{}}, false},
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{readASN1Test{"present", []byte{0xa1, 3, 0x4, 1, 1}, 0xa1, true, []byte{1}}, true},
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}
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func TestReadASN1OptionalOctetString(t *testing.T) {
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for _, test := range optionalOctetStringTestData {
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t.Run(test.name, func(t *testing.T) {
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in := String(test.in)
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var out []byte
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var present bool
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ok := in.ReadOptionalASN1OctetString(&out, &present, test.tag)
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if ok != test.ok || present != test.present || !bytes.Equal(out, test.out.([]byte)) {
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t.Errorf("in.ReadOptionalASN1OctetString() = %v, want %v; present = %v want %v; out = %v, want %v", ok, test.ok, present, test.present, out, test.out)
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}
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})
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}
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}
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const defaultInt = -1
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var optionalIntTestData = []readASN1Test{
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{"empty", []byte{}, 0xa0, true, defaultInt},
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{"invalid", []byte{0xa1, 3, 0x2, 2, 127}, 0xa1, false, 0},
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{"missing", []byte{0xa1, 3, 0x2, 1, 127}, 0xa0, true, defaultInt},
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{"present", []byte{0xa1, 3, 0x2, 1, 42}, 0xa1, true, 42},
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}
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func TestReadASN1OptionalInteger(t *testing.T) {
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for _, test := range optionalIntTestData {
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t.Run(test.name, func(t *testing.T) {
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in := String(test.in)
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var out int
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ok := in.ReadOptionalASN1Integer(&out, test.tag, defaultInt)
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if ok != test.ok || ok && out != test.out.(int) {
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t.Errorf("in.ReadOptionalASN1Integer() = %v, want %v; out = %v, want %v", ok, test.ok, out, test.out)
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}
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})
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}
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}
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func TestReadASN1IntegerSigned(t *testing.T) {
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testData64 := []struct {
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in []byte
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out int64
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}{
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{[]byte{2, 3, 128, 0, 0}, -0x800000},
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{[]byte{2, 2, 255, 0}, -256},
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{[]byte{2, 2, 255, 127}, -129},
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{[]byte{2, 1, 128}, -128},
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{[]byte{2, 1, 255}, -1},
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{[]byte{2, 1, 0}, 0},
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{[]byte{2, 1, 1}, 1},
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{[]byte{2, 1, 2}, 2},
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{[]byte{2, 1, 127}, 127},
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{[]byte{2, 2, 0, 128}, 128},
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{[]byte{2, 2, 1, 0}, 256},
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{[]byte{2, 4, 0, 128, 0, 0}, 0x800000},
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}
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for i, test := range testData64 {
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in := String(test.in)
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var out int64
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ok := in.ReadASN1Integer(&out)
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if !ok || out != test.out {
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t.Errorf("#%d: in.ReadASN1Integer() = %v, want true; out = %d, want %d", i, ok, out, test.out)
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}
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}
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// Repeat the same cases, reading into a big.Int.
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t.Run("big.Int", func(t *testing.T) {
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for i, test := range testData64 {
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in := String(test.in)
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var out big.Int
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ok := in.ReadASN1Integer(&out)
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if !ok || out.Int64() != test.out {
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t.Errorf("#%d: in.ReadASN1Integer() = %v, want true; out = %d, want %d", i, ok, out.Int64(), test.out)
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}
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}
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})
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// Repeat with the implicit-tagging functions
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t.Run("WithTag", func(t *testing.T) {
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for i, test := range testData64 {
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tag := asn1.Tag((i * 3) % 32).ContextSpecific()
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testData := make([]byte, len(test.in))
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copy(testData, test.in)
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// Alter the tag of the test case.
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testData[0] = uint8(tag)
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in := String(testData)
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var out int64
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ok := in.ReadASN1Int64WithTag(&out, tag)
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if !ok || out != test.out {
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t.Errorf("#%d: in.ReadASN1Int64WithTag() = %v, want true; out = %d, want %d", i, ok, out, test.out)
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}
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var b Builder
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b.AddASN1Int64WithTag(test.out, tag)
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result, err := b.Bytes()
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if err != nil {
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t.Errorf("#%d: AddASN1Int64WithTag failed: %s", i, err)
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continue
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}
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if !bytes.Equal(result, testData) {
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t.Errorf("#%d: AddASN1Int64WithTag: got %x, want %x", i, result, testData)
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}
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}
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})
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}
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func TestReadASN1IntegerUnsigned(t *testing.T) {
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testData := []struct {
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in []byte
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out uint64
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}{
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{[]byte{2, 1, 0}, 0},
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{[]byte{2, 1, 1}, 1},
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{[]byte{2, 1, 2}, 2},
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{[]byte{2, 1, 127}, 127},
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{[]byte{2, 2, 0, 128}, 128},
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{[]byte{2, 2, 1, 0}, 256},
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{[]byte{2, 4, 0, 128, 0, 0}, 0x800000},
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{[]byte{2, 8, 127, 255, 255, 255, 255, 255, 255, 255}, 0x7fffffffffffffff},
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{[]byte{2, 9, 0, 128, 0, 0, 0, 0, 0, 0, 0}, 0x8000000000000000},
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{[]byte{2, 9, 0, 255, 255, 255, 255, 255, 255, 255, 255}, 0xffffffffffffffff},
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}
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for i, test := range testData {
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in := String(test.in)
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var out uint64
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ok := in.ReadASN1Integer(&out)
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if !ok || out != test.out {
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t.Errorf("#%d: in.ReadASN1Integer() = %v, want true; out = %d, want %d", i, ok, out, test.out)
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}
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}
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}
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func TestReadASN1IntegerInvalid(t *testing.T) {
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testData := []String{
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[]byte{3, 1, 0}, // invalid tag
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// truncated
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[]byte{2, 1},
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[]byte{2, 2, 0},
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// not minimally encoded
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[]byte{2, 2, 0, 1},
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[]byte{2, 2, 0xff, 0xff},
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}
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for i, test := range testData {
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var out int64
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if test.ReadASN1Integer(&out) {
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t.Errorf("#%d: in.ReadASN1Integer() = true, want false (out = %d)", i, out)
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}
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}
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}
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func TestASN1ObjectIdentifier(t *testing.T) {
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testData := []struct {
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in []byte
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ok bool
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out []int
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}{
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{[]byte{}, false, []int{}},
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{[]byte{6, 0}, false, []int{}},
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{[]byte{5, 1, 85}, false, []int{2, 5}},
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{[]byte{6, 1, 85}, true, []int{2, 5}},
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{[]byte{6, 2, 85, 0x02}, true, []int{2, 5, 2}},
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{[]byte{6, 4, 85, 0x02, 0xc0, 0x00}, true, []int{2, 5, 2, 0x2000}},
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{[]byte{6, 3, 0x81, 0x34, 0x03}, true, []int{2, 100, 3}},
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{[]byte{6, 7, 85, 0x02, 0xc0, 0x80, 0x80, 0x80, 0x80}, false, []int{}},
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}
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for i, test := range testData {
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in := String(test.in)
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var out encoding_asn1.ObjectIdentifier
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ok := in.ReadASN1ObjectIdentifier(&out)
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if ok != test.ok || ok && !out.Equal(test.out) {
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t.Errorf("#%d: in.ReadASN1ObjectIdentifier() = %v, want %v; out = %v, want %v", i, ok, test.ok, out, test.out)
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continue
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}
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var b Builder
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b.AddASN1ObjectIdentifier(out)
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result, err := b.Bytes()
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if builderOk := err == nil; test.ok != builderOk {
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t.Errorf("#%d: error from Builder.Bytes: %s", i, err)
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continue
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}
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if test.ok && !bytes.Equal(result, test.in) {
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t.Errorf("#%d: reserialisation didn't match, got %x, want %x", i, result, test.in)
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continue
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}
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}
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}
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func TestReadASN1GeneralizedTime(t *testing.T) {
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testData := []struct {
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in string
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ok bool
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out time.Time
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}{
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{"20100102030405Z", true, time.Date(2010, 01, 02, 03, 04, 05, 0, time.UTC)},
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{"20100102030405", false, time.Time{}},
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{"20100102030405+0607", true, time.Date(2010, 01, 02, 03, 04, 05, 0, time.FixedZone("", 6*60*60+7*60))},
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{"20100102030405-0607", true, time.Date(2010, 01, 02, 03, 04, 05, 0, time.FixedZone("", -6*60*60-7*60))},
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/* These are invalid times. However, the time package normalises times
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* and they were accepted in some versions. See #11134. */
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{"00000100000000Z", false, time.Time{}},
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{"20101302030405Z", false, time.Time{}},
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{"20100002030405Z", false, time.Time{}},
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{"20100100030405Z", false, time.Time{}},
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{"20100132030405Z", false, time.Time{}},
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{"20100231030405Z", false, time.Time{}},
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{"20100102240405Z", false, time.Time{}},
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{"20100102036005Z", false, time.Time{}},
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{"20100102030460Z", false, time.Time{}},
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{"-20100102030410Z", false, time.Time{}},
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{"2010-0102030410Z", false, time.Time{}},
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{"2010-0002030410Z", false, time.Time{}},
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{"201001-02030410Z", false, time.Time{}},
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{"20100102-030410Z", false, time.Time{}},
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{"2010010203-0410Z", false, time.Time{}},
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{"201001020304-10Z", false, time.Time{}},
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}
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for i, test := range testData {
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in := String(append([]byte{byte(asn1.GeneralizedTime), byte(len(test.in))}, test.in...))
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var out time.Time
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ok := in.ReadASN1GeneralizedTime(&out)
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if ok != test.ok || ok && !reflect.DeepEqual(out, test.out) {
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t.Errorf("#%d: in.ReadASN1GeneralizedTime() = %v, want %v; out = %q, want %q", i, ok, test.ok, out, test.out)
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}
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}
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}
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func TestReadASN1BitString(t *testing.T) {
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testData := []struct {
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in []byte
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ok bool
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out encoding_asn1.BitString
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}{
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{[]byte{}, false, encoding_asn1.BitString{}},
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{[]byte{0x00}, true, encoding_asn1.BitString{}},
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{[]byte{0x07, 0x00}, true, encoding_asn1.BitString{Bytes: []byte{0}, BitLength: 1}},
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{[]byte{0x07, 0x01}, false, encoding_asn1.BitString{}},
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{[]byte{0x07, 0x40}, false, encoding_asn1.BitString{}},
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{[]byte{0x08, 0x00}, false, encoding_asn1.BitString{}},
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{[]byte{0xff}, false, encoding_asn1.BitString{}},
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{[]byte{0xfe, 0x00}, false, encoding_asn1.BitString{}},
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}
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for i, test := range testData {
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in := String(append([]byte{3, byte(len(test.in))}, test.in...))
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var out encoding_asn1.BitString
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ok := in.ReadASN1BitString(&out)
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if ok != test.ok || ok && (!bytes.Equal(out.Bytes, test.out.Bytes) || out.BitLength != test.out.BitLength) {
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t.Errorf("#%d: in.ReadASN1BitString() = %v, want %v; out = %v, want %v", i, ok, test.ok, out, test.out)
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}
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}
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}
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