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