// Copyright 2009 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 asn1 import ( "bytes" "encoding/hex" "fmt" "math" "math/big" "reflect" "strings" "testing" "time" ) type boolTest struct { in []byte ok bool out bool } var boolTestData = []boolTest{ {[]byte{0x00}, true, false}, {[]byte{0xff}, true, true}, {[]byte{0x00, 0x00}, false, false}, {[]byte{0xff, 0xff}, false, false}, {[]byte{0x01}, false, false}, } func TestParseBool(t *testing.T) { for i, test := range boolTestData { ret, err := parseBool(test.in) if (err == nil) != test.ok { t.Errorf("#%d: Incorrect error result (did fail? %v, expected: %v)", i, err == nil, test.ok) } if test.ok && ret != test.out { t.Errorf("#%d: Bad result: %v (expected %v)", i, ret, test.out) } } } type int64Test struct { in []byte ok bool out int64 } var int64TestData = []int64Test{ {[]byte{0x00}, true, 0}, {[]byte{0x7f}, true, 127}, {[]byte{0x00, 0x80}, true, 128}, {[]byte{0x01, 0x00}, true, 256}, {[]byte{0x80}, true, -128}, {[]byte{0xff, 0x7f}, true, -129}, {[]byte{0xff}, true, -1}, {[]byte{0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, true, -9223372036854775808}, {[]byte{0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}, false, 0}, {[]byte{}, false, 0}, {[]byte{0x00, 0x7f}, false, 0}, {[]byte{0xff, 0xf0}, false, 0}, } func TestParseInt64(t *testing.T) { for i, test := range int64TestData { ret, err := parseInt64(test.in) if (err == nil) != test.ok { t.Errorf("#%d: Incorrect error result (did fail? %v, expected: %v)", i, err == nil, test.ok) } if test.ok && ret != test.out { t.Errorf("#%d: Bad result: %v (expected %v)", i, ret, test.out) } } } type int32Test struct { in []byte ok bool out int32 } var int32TestData = []int32Test{ {[]byte{0x00}, true, 0}, {[]byte{0x7f}, true, 127}, {[]byte{0x00, 0x80}, true, 128}, {[]byte{0x01, 0x00}, true, 256}, {[]byte{0x80}, true, -128}, {[]byte{0xff, 0x7f}, true, -129}, {[]byte{0xff}, true, -1}, {[]byte{0x80, 0x00, 0x00, 0x00}, true, -2147483648}, {[]byte{0x80, 0x00, 0x00, 0x00, 0x00}, false, 0}, {[]byte{}, false, 0}, {[]byte{0x00, 0x7f}, false, 0}, {[]byte{0xff, 0xf0}, false, 0}, } func TestParseInt32(t *testing.T) { for i, test := range int32TestData { ret, err := parseInt32(test.in) if (err == nil) != test.ok { t.Errorf("#%d: Incorrect error result (did fail? %v, expected: %v)", i, err == nil, test.ok) } if test.ok && ret != test.out { t.Errorf("#%d: Bad result: %v (expected %v)", i, ret, test.out) } } } var bigIntTests = []struct { in []byte ok bool base10 string }{ {[]byte{0xff}, true, "-1"}, {[]byte{0x00}, true, "0"}, {[]byte{0x01}, true, "1"}, {[]byte{0x00, 0xff}, true, "255"}, {[]byte{0xff, 0x00}, true, "-256"}, {[]byte{0x01, 0x00}, true, "256"}, {[]byte{}, false, ""}, {[]byte{0x00, 0x7f}, false, ""}, {[]byte{0xff, 0xf0}, false, ""}, } func TestParseBigInt(t *testing.T) { for i, test := range bigIntTests { ret, err := parseBigInt(test.in) if (err == nil) != test.ok { t.Errorf("#%d: Incorrect error result (did fail? %v, expected: %v)", i, err == nil, test.ok) } if test.ok { if ret.String() != test.base10 { t.Errorf("#%d: bad result from %x, got %s want %s", i, test.in, ret.String(), test.base10) } e, err := makeBigInt(ret) if err != nil { t.Errorf("%d: err=%q", i, err) continue } result := make([]byte, e.Len()) e.Encode(result) if !bytes.Equal(result, test.in) { t.Errorf("#%d: got %x from marshaling %s, want %x", i, result, ret, test.in) } } } } type bitStringTest struct { in []byte ok bool out []byte bitLength int } var bitStringTestData = []bitStringTest{ {[]byte{}, false, []byte{}, 0}, {[]byte{0x00}, true, []byte{}, 0}, {[]byte{0x07, 0x00}, true, []byte{0x00}, 1}, {[]byte{0x07, 0x01}, false, []byte{}, 0}, {[]byte{0x07, 0x40}, false, []byte{}, 0}, {[]byte{0x08, 0x00}, false, []byte{}, 0}, } func TestBitString(t *testing.T) { for i, test := range bitStringTestData { ret, err := parseBitString(test.in) if (err == nil) != test.ok { t.Errorf("#%d: Incorrect error result (did fail? %v, expected: %v)", i, err == nil, test.ok) } if err == nil { if test.bitLength != ret.BitLength || !bytes.Equal(ret.Bytes, test.out) { t.Errorf("#%d: Bad result: %v (expected %v %v)", i, ret, test.out, test.bitLength) } } } } func TestBitStringAt(t *testing.T) { bs := BitString{[]byte{0x82, 0x40}, 16} if bs.At(0) != 1 { t.Error("#1: Failed") } if bs.At(1) != 0 { t.Error("#2: Failed") } if bs.At(6) != 1 { t.Error("#3: Failed") } if bs.At(9) != 1 { t.Error("#4: Failed") } if bs.At(-1) != 0 { t.Error("#5: Failed") } if bs.At(17) != 0 { t.Error("#6: Failed") } } type bitStringRightAlignTest struct { in []byte inlen int out []byte } var bitStringRightAlignTests = []bitStringRightAlignTest{ {[]byte{0x80}, 1, []byte{0x01}}, {[]byte{0x80, 0x80}, 9, []byte{0x01, 0x01}}, {[]byte{}, 0, []byte{}}, {[]byte{0xce}, 8, []byte{0xce}}, {[]byte{0xce, 0x47}, 16, []byte{0xce, 0x47}}, {[]byte{0x34, 0x50}, 12, []byte{0x03, 0x45}}, } func TestBitStringRightAlign(t *testing.T) { for i, test := range bitStringRightAlignTests { bs := BitString{test.in, test.inlen} out := bs.RightAlign() if !bytes.Equal(out, test.out) { t.Errorf("#%d got: %x want: %x", i, out, test.out) } } } type objectIdentifierTest struct { in []byte ok bool out ObjectIdentifier // has base type[]int } var objectIdentifierTestData = []objectIdentifierTest{ {[]byte{}, false, []int{}}, {[]byte{85}, true, []int{2, 5}}, {[]byte{85, 0x02}, true, []int{2, 5, 2}}, {[]byte{85, 0x02, 0xc0, 0x00}, true, []int{2, 5, 2, 0x2000}}, {[]byte{0x81, 0x34, 0x03}, true, []int{2, 100, 3}}, {[]byte{85, 0x02, 0xc0, 0x80, 0x80, 0x80, 0x80}, false, []int{}}, } func TestObjectIdentifier(t *testing.T) { for i, test := range objectIdentifierTestData { ret, err := parseObjectIdentifier(test.in) if (err == nil) != test.ok { t.Errorf("#%d: Incorrect error result (did fail? %v, expected: %v)", i, err == nil, test.ok) } if err == nil { if !reflect.DeepEqual(test.out, ret) { t.Errorf("#%d: Bad result: %v (expected %v)", i, ret, test.out) } } } if s := ObjectIdentifier([]int{1, 2, 3, 4}).String(); s != "1.2.3.4" { t.Errorf("bad ObjectIdentifier.String(). Got %s, want 1.2.3.4", s) } } type timeTest struct { in string ok bool out time.Time } var utcTestData = []timeTest{ {"910506164540-0700", true, time.Date(1991, 05, 06, 16, 45, 40, 0, time.FixedZone("", -7*60*60))}, {"910506164540+0730", true, time.Date(1991, 05, 06, 16, 45, 40, 0, time.FixedZone("", 7*60*60+30*60))}, {"910506234540Z", true, time.Date(1991, 05, 06, 23, 45, 40, 0, time.UTC)}, {"9105062345Z", true, time.Date(1991, 05, 06, 23, 45, 0, 0, time.UTC)}, {"5105062345Z", true, time.Date(1951, 05, 06, 23, 45, 0, 0, time.UTC)}, {"a10506234540Z", false, time.Time{}}, {"91a506234540Z", false, time.Time{}}, {"9105a6234540Z", false, time.Time{}}, {"910506a34540Z", false, time.Time{}}, {"910506334a40Z", false, time.Time{}}, {"91050633444aZ", false, time.Time{}}, {"910506334461Z", false, time.Time{}}, {"910506334400Za", false, time.Time{}}, /* These are invalid times. However, the time package normalises times * and they were accepted in some versions. See #11134. */ {"000100000000Z", false, time.Time{}}, {"101302030405Z", false, time.Time{}}, {"100002030405Z", false, time.Time{}}, {"100100030405Z", false, time.Time{}}, {"100132030405Z", false, time.Time{}}, {"100231030405Z", false, time.Time{}}, {"100102240405Z", false, time.Time{}}, {"100102036005Z", false, time.Time{}}, {"100102030460Z", false, time.Time{}}, {"-100102030410Z", false, time.Time{}}, {"10-0102030410Z", false, time.Time{}}, {"10-0002030410Z", false, time.Time{}}, {"1001-02030410Z", false, time.Time{}}, {"100102-030410Z", false, time.Time{}}, {"10010203-0410Z", false, time.Time{}}, {"1001020304-10Z", false, time.Time{}}, } func TestUTCTime(t *testing.T) { for i, test := range utcTestData { ret, err := parseUTCTime([]byte(test.in)) if err != nil { if test.ok { t.Errorf("#%d: parseUTCTime(%q) = error %v", i, test.in, err) } continue } if !test.ok { t.Errorf("#%d: parseUTCTime(%q) succeeded, should have failed", i, test.in) continue } const format = "Jan _2 15:04:05 -0700 2006" // ignore zone name, just offset have := ret.Format(format) want := test.out.Format(format) if have != want { t.Errorf("#%d: parseUTCTime(%q) = %s, want %s", i, test.in, have, want) } } } var generalizedTimeTestData = []timeTest{ {"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{}}, } func TestGeneralizedTime(t *testing.T) { for i, test := range generalizedTimeTestData { ret, err := parseGeneralizedTime([]byte(test.in)) if (err == nil) != test.ok { t.Errorf("#%d: Incorrect error result (did fail? %v, expected: %v)", i, err == nil, test.ok) } if err == nil { if !reflect.DeepEqual(test.out, ret) { t.Errorf("#%d: Bad result: %q → %v (expected %v)", i, test.in, ret, test.out) } } } } type tagAndLengthTest struct { in []byte ok bool out tagAndLength } var tagAndLengthData = []tagAndLengthTest{ {[]byte{0x80, 0x01}, true, tagAndLength{2, 0, 1, false}}, {[]byte{0xa0, 0x01}, true, tagAndLength{2, 0, 1, true}}, {[]byte{0x02, 0x00}, true, tagAndLength{0, 2, 0, false}}, {[]byte{0xfe, 0x00}, true, tagAndLength{3, 30, 0, true}}, {[]byte{0x1f, 0x1f, 0x00}, true, tagAndLength{0, 31, 0, false}}, {[]byte{0x1f, 0x81, 0x00, 0x00}, true, tagAndLength{0, 128, 0, false}}, {[]byte{0x1f, 0x81, 0x80, 0x01, 0x00}, true, tagAndLength{0, 0x4001, 0, false}}, {[]byte{0x00, 0x81, 0x80}, true, tagAndLength{0, 0, 128, false}}, {[]byte{0x00, 0x82, 0x01, 0x00}, true, tagAndLength{0, 0, 256, false}}, {[]byte{0x00, 0x83, 0x01, 0x00}, false, tagAndLength{}}, {[]byte{0x1f, 0x85}, false, tagAndLength{}}, {[]byte{0x30, 0x80}, false, tagAndLength{}}, // Superfluous zeros in the length should be an error. {[]byte{0xa0, 0x82, 0x00, 0xff}, false, tagAndLength{}}, // Lengths up to the maximum size of an int should work. {[]byte{0xa0, 0x84, 0x7f, 0xff, 0xff, 0xff}, true, tagAndLength{2, 0, 0x7fffffff, true}}, // Lengths that would overflow an int should be rejected. {[]byte{0xa0, 0x84, 0x80, 0x00, 0x00, 0x00}, false, tagAndLength{}}, // Long length form may not be used for lengths that fit in short form. {[]byte{0xa0, 0x81, 0x7f}, false, tagAndLength{}}, // Tag numbers which would overflow int32 are rejected. (The value below is 2^31.) {[]byte{0x1f, 0x88, 0x80, 0x80, 0x80, 0x00, 0x00}, false, tagAndLength{}}, // Tag numbers that fit in an int32 are valid. (The value below is 2^31 - 1.) {[]byte{0x1f, 0x87, 0xFF, 0xFF, 0xFF, 0x7F, 0x00}, true, tagAndLength{tag: math.MaxInt32}}, // Long tag number form may not be used for tags that fit in short form. {[]byte{0x1f, 0x1e, 0x00}, false, tagAndLength{}}, } func TestParseTagAndLength(t *testing.T) { for i, test := range tagAndLengthData { tagAndLength, _, err := parseTagAndLength(test.in, 0) if (err == nil) != test.ok { t.Errorf("#%d: Incorrect error result (did pass? %v, expected: %v)", i, err == nil, test.ok) } if err == nil && !reflect.DeepEqual(test.out, tagAndLength) { t.Errorf("#%d: Bad result: %v (expected %v)", i, tagAndLength, test.out) } } } type parseFieldParametersTest struct { in string out fieldParameters } func newInt(n int) *int { return &n } func newInt64(n int64) *int64 { return &n } func newString(s string) *string { return &s } func newBool(b bool) *bool { return &b } var parseFieldParametersTestData []parseFieldParametersTest = []parseFieldParametersTest{ {"", fieldParameters{}}, {"ia5", fieldParameters{stringType: TagIA5String}}, {"generalized", fieldParameters{timeType: TagGeneralizedTime}}, {"utc", fieldParameters{timeType: TagUTCTime}}, {"printable", fieldParameters{stringType: TagPrintableString}}, {"numeric", fieldParameters{stringType: TagNumericString}}, {"optional", fieldParameters{optional: true}}, {"explicit", fieldParameters{explicit: true, tag: new(int)}}, {"application", fieldParameters{application: true, tag: new(int)}}, {"private", fieldParameters{private: true, tag: new(int)}}, {"optional,explicit", fieldParameters{optional: true, explicit: true, tag: new(int)}}, {"default:42", fieldParameters{defaultValue: newInt64(42)}}, {"tag:17", fieldParameters{tag: newInt(17)}}, {"optional,explicit,default:42,tag:17", fieldParameters{optional: true, explicit: true, defaultValue: newInt64(42), tag: newInt(17)}}, {"optional,explicit,default:42,tag:17,rubbish1", fieldParameters{optional: true, explicit: true, application: false, defaultValue: newInt64(42), tag: newInt(17), stringType: 0, timeType: 0, set: false, omitEmpty: false}}, {"set", fieldParameters{set: true}}, } func TestParseFieldParameters(t *testing.T) { for i, test := range parseFieldParametersTestData { f := parseFieldParameters(test.in) if !reflect.DeepEqual(f, test.out) { t.Errorf("#%d: Bad result: %v (expected %v)", i, f, test.out) } } } type TestObjectIdentifierStruct struct { OID ObjectIdentifier } type TestContextSpecificTags struct { A int `asn1:"tag:1"` } type TestContextSpecificTags2 struct { A int `asn1:"explicit,tag:1"` B int } type TestContextSpecificTags3 struct { S string `asn1:"tag:1,utf8"` } type TestElementsAfterString struct { S string A, B int } type TestBigInt struct { X *big.Int } type TestSet struct { Ints []int `asn1:"set"` } var unmarshalTestData = []struct { in []byte out any }{ {[]byte{0x02, 0x01, 0x42}, newInt(0x42)}, {[]byte{0x05, 0x00}, &RawValue{0, 5, false, []byte{}, []byte{0x05, 0x00}}}, {[]byte{0x30, 0x08, 0x06, 0x06, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d}, &TestObjectIdentifierStruct{[]int{1, 2, 840, 113549}}}, {[]byte{0x03, 0x04, 0x06, 0x6e, 0x5d, 0xc0}, &BitString{[]byte{110, 93, 192}, 18}}, {[]byte{0x30, 0x09, 0x02, 0x01, 0x01, 0x02, 0x01, 0x02, 0x02, 0x01, 0x03}, &[]int{1, 2, 3}}, {[]byte{0x02, 0x01, 0x10}, newInt(16)}, {[]byte{0x13, 0x04, 't', 'e', 's', 't'}, newString("test")}, {[]byte{0x16, 0x04, 't', 'e', 's', 't'}, newString("test")}, // Ampersand is allowed in PrintableString due to mistakes by major CAs. {[]byte{0x13, 0x05, 't', 'e', 's', 't', '&'}, newString("test&")}, {[]byte{0x16, 0x04, 't', 'e', 's', 't'}, &RawValue{0, 22, false, []byte("test"), []byte("\x16\x04test")}}, {[]byte{0x04, 0x04, 1, 2, 3, 4}, &RawValue{0, 4, false, []byte{1, 2, 3, 4}, []byte{4, 4, 1, 2, 3, 4}}}, {[]byte{0x30, 0x03, 0x81, 0x01, 0x01}, &TestContextSpecificTags{1}}, {[]byte{0x30, 0x08, 0xa1, 0x03, 0x02, 0x01, 0x01, 0x02, 0x01, 0x02}, &TestContextSpecificTags2{1, 2}}, {[]byte{0x30, 0x03, 0x81, 0x01, '@'}, &TestContextSpecificTags3{"@"}}, {[]byte{0x01, 0x01, 0x00}, newBool(false)}, {[]byte{0x01, 0x01, 0xff}, newBool(true)}, {[]byte{0x30, 0x0b, 0x13, 0x03, 0x66, 0x6f, 0x6f, 0x02, 0x01, 0x22, 0x02, 0x01, 0x33}, &TestElementsAfterString{"foo", 0x22, 0x33}}, {[]byte{0x30, 0x05, 0x02, 0x03, 0x12, 0x34, 0x56}, &TestBigInt{big.NewInt(0x123456)}}, {[]byte{0x30, 0x0b, 0x31, 0x09, 0x02, 0x01, 0x01, 0x02, 0x01, 0x02, 0x02, 0x01, 0x03}, &TestSet{Ints: []int{1, 2, 3}}}, {[]byte{0x12, 0x0b, '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ' '}, newString("0123456789 ")}, } func TestUnmarshal(t *testing.T) { for i, test := range unmarshalTestData { pv := reflect.New(reflect.TypeOf(test.out).Elem()) val := pv.Interface() _, err := Unmarshal(test.in, val) if err != nil { t.Errorf("Unmarshal failed at index %d %v", i, err) } if !reflect.DeepEqual(val, test.out) { t.Errorf("#%d:\nhave %#v\nwant %#v", i, val, test.out) } } } func TestUnmarshalWithNilOrNonPointer(t *testing.T) { tests := []struct { b []byte v any want string }{ {b: []byte{0x05, 0x00}, v: nil, want: "asn1: Unmarshal recipient value is nil"}, {b: []byte{0x05, 0x00}, v: RawValue{}, want: "asn1: Unmarshal recipient value is non-pointer asn1.RawValue"}, {b: []byte{0x05, 0x00}, v: (*RawValue)(nil), want: "asn1: Unmarshal recipient value is nil *asn1.RawValue"}, } for _, test := range tests { _, err := Unmarshal(test.b, test.v) if err == nil { t.Errorf("Unmarshal expecting error, got nil") continue } if g, w := err.Error(), test.want; g != w { t.Errorf("InvalidUnmarshalError mismatch\nGot: %q\nWant: %q", g, w) } } } type Certificate struct { TBSCertificate TBSCertificate SignatureAlgorithm AlgorithmIdentifier SignatureValue BitString } type TBSCertificate struct { Version int `asn1:"optional,explicit,default:0,tag:0"` SerialNumber RawValue SignatureAlgorithm AlgorithmIdentifier Issuer RDNSequence Validity Validity Subject RDNSequence PublicKey PublicKeyInfo } type AlgorithmIdentifier struct { Algorithm ObjectIdentifier } type RDNSequence []RelativeDistinguishedNameSET type RelativeDistinguishedNameSET []AttributeTypeAndValue type AttributeTypeAndValue struct { Type ObjectIdentifier Value any } type Validity struct { NotBefore, NotAfter time.Time } type PublicKeyInfo struct { Algorithm AlgorithmIdentifier PublicKey BitString } func TestCertificate(t *testing.T) { // This is a minimal, self-signed certificate that should parse correctly. var cert Certificate if _, err := Unmarshal(derEncodedSelfSignedCertBytes, &cert); err != nil { t.Errorf("Unmarshal failed: %v", err) } if !reflect.DeepEqual(cert, derEncodedSelfSignedCert) { t.Errorf("Bad result:\ngot: %+v\nwant: %+v", cert, derEncodedSelfSignedCert) } } func TestCertificateWithNUL(t *testing.T) { // This is the paypal NUL-hack certificate. It should fail to parse because // NUL isn't a permitted character in a PrintableString. var cert Certificate if _, err := Unmarshal(derEncodedPaypalNULCertBytes, &cert); err == nil { t.Error("Unmarshal succeeded, should not have") } } type rawStructTest struct { Raw RawContent A int } func TestRawStructs(t *testing.T) { var s rawStructTest input := []byte{0x30, 0x03, 0x02, 0x01, 0x50} rest, err := Unmarshal(input, &s) if len(rest) != 0 { t.Errorf("incomplete parse: %x", rest) return } if err != nil { t.Error(err) return } if s.A != 0x50 { t.Errorf("bad value for A: got %d want %d", s.A, 0x50) } if !bytes.Equal([]byte(s.Raw), input) { t.Errorf("bad value for Raw: got %x want %x", s.Raw, input) } } type oiEqualTest struct { first ObjectIdentifier second ObjectIdentifier same bool } var oiEqualTests = []oiEqualTest{ { ObjectIdentifier{1, 2, 3}, ObjectIdentifier{1, 2, 3}, true, }, { ObjectIdentifier{1}, ObjectIdentifier{1, 2, 3}, false, }, { ObjectIdentifier{1, 2, 3}, ObjectIdentifier{10, 11, 12}, false, }, } func TestObjectIdentifierEqual(t *testing.T) { for _, o := range oiEqualTests { if s := o.first.Equal(o.second); s != o.same { t.Errorf("ObjectIdentifier.Equal: got: %t want: %t", s, o.same) } } } var derEncodedSelfSignedCert = Certificate{ TBSCertificate: TBSCertificate{ Version: 0, SerialNumber: RawValue{Class: 0, Tag: 2, IsCompound: false, Bytes: []uint8{0x0, 0x8c, 0xc3, 0x37, 0x92, 0x10, 0xec, 0x2c, 0x98}, FullBytes: []byte{2, 9, 0x0, 0x8c, 0xc3, 0x37, 0x92, 0x10, 0xec, 0x2c, 0x98}}, SignatureAlgorithm: AlgorithmIdentifier{Algorithm: ObjectIdentifier{1, 2, 840, 113549, 1, 1, 5}}, Issuer: RDNSequence{ RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 6}, Value: "XX"}}, RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 8}, Value: "Some-State"}}, RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 7}, Value: "City"}}, RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 10}, Value: "Internet Widgits Pty Ltd"}}, RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 3}, Value: "false.example.com"}}, RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{1, 2, 840, 113549, 1, 9, 1}, Value: "false@example.com"}}, }, Validity: Validity{ NotBefore: time.Date(2009, 10, 8, 00, 25, 53, 0, time.UTC), NotAfter: time.Date(2010, 10, 8, 00, 25, 53, 0, time.UTC), }, Subject: RDNSequence{ RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 6}, Value: "XX"}}, RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 8}, Value: "Some-State"}}, RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 7}, Value: "City"}}, RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 10}, Value: "Internet Widgits Pty Ltd"}}, RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 3}, Value: "false.example.com"}}, RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{1, 2, 840, 113549, 1, 9, 1}, Value: "false@example.com"}}, }, PublicKey: PublicKeyInfo{ Algorithm: AlgorithmIdentifier{Algorithm: ObjectIdentifier{1, 2, 840, 113549, 1, 1, 1}}, PublicKey: BitString{ Bytes: []uint8{ 0x30, 0x48, 0x2, 0x41, 0x0, 0xcd, 0xb7, 0x63, 0x9c, 0x32, 0x78, 0xf0, 0x6, 0xaa, 0x27, 0x7f, 0x6e, 0xaf, 0x42, 0x90, 0x2b, 0x59, 0x2d, 0x8c, 0xbc, 0xbe, 0x38, 0xa1, 0xc9, 0x2b, 0xa4, 0x69, 0x5a, 0x33, 0x1b, 0x1d, 0xea, 0xde, 0xad, 0xd8, 0xe9, 0xa5, 0xc2, 0x7e, 0x8c, 0x4c, 0x2f, 0xd0, 0xa8, 0x88, 0x96, 0x57, 0x72, 0x2a, 0x4f, 0x2a, 0xf7, 0x58, 0x9c, 0xf2, 0xc7, 0x70, 0x45, 0xdc, 0x8f, 0xde, 0xec, 0x35, 0x7d, 0x2, 0x3, 0x1, 0x0, 0x1, }, BitLength: 592, }, }, }, SignatureAlgorithm: AlgorithmIdentifier{Algorithm: ObjectIdentifier{1, 2, 840, 113549, 1, 1, 5}}, SignatureValue: BitString{ Bytes: []uint8{ 0xa6, 0x7b, 0x6, 0xec, 0x5e, 0xce, 0x92, 0x77, 0x2c, 0xa4, 0x13, 0xcb, 0xa3, 0xca, 0x12, 0x56, 0x8f, 0xdc, 0x6c, 0x7b, 0x45, 0x11, 0xcd, 0x40, 0xa7, 0xf6, 0x59, 0x98, 0x4, 0x2, 0xdf, 0x2b, 0x99, 0x8b, 0xb9, 0xa4, 0xa8, 0xcb, 0xeb, 0x34, 0xc0, 0xf0, 0xa7, 0x8c, 0xf8, 0xd9, 0x1e, 0xde, 0x14, 0xa5, 0xed, 0x76, 0xbf, 0x11, 0x6f, 0xe3, 0x60, 0xaa, 0xfa, 0x88, 0x21, 0x49, 0x4, 0x35, }, BitLength: 512, }, } var derEncodedSelfSignedCertBytes = []byte{ 0x30, 0x82, 0x02, 0x18, 0x30, 0x82, 0x01, 0xc2, 0x02, 0x09, 0x00, 0x8c, 0xc3, 0x37, 0x92, 0x10, 0xec, 0x2c, 0x98, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05, 0x00, 0x30, 0x81, 0x92, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x58, 0x58, 0x31, 0x13, 0x30, 0x11, 0x06, 0x03, 0x55, 0x04, 0x08, 0x13, 0x0a, 0x53, 0x6f, 0x6d, 0x65, 0x2d, 0x53, 0x74, 0x61, 0x74, 0x65, 0x31, 0x0d, 0x30, 0x0b, 0x06, 0x03, 0x55, 0x04, 0x07, 0x13, 0x04, 0x43, 0x69, 0x74, 0x79, 0x31, 0x21, 0x30, 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0x37, 0x78, 0x41, 0x5b, 0xf7, 0x82, 0xa5, 0xf2, 0xba, 0x41, 0x25, 0x5a, 0x90, 0x1a, 0x1e, 0x45, 0x38, 0xa1, 0x52, 0x58, 0x75, 0x94, 0x26, 0x44, 0xfb, 0x20, 0x07, 0xba, 0x44, 0xcc, 0xe5, 0x4a, 0x2d, 0x72, 0x3f, 0x98, 0x47, 0xf6, 0x26, 0xdc, 0x05, 0x46, 0x05, 0x07, 0x63, 0x21, 0xab, 0x46, 0x9b, 0x9c, 0x78, 0xd5, 0x54, 0x5b, 0x3d, 0x0c, 0x1e, 0xc8, 0x64, 0x8c, 0xb5, 0x50, 0x23, 0x82, 0x6f, 0xdb, 0xb8, 0x22, 0x1c, 0x43, 0x96, 0x07, 0xa8, 0xbb, } var stringSliceTestData = [][]string{ {"foo", "bar"}, {"foo", "\\bar"}, {"foo", "\"bar\""}, {"foo", "åäö"}, } func TestStringSlice(t *testing.T) { for _, test := range stringSliceTestData { bs, err := Marshal(test) if err != nil { t.Error(err) } var res []string _, err = Unmarshal(bs, &res) if err != nil { t.Error(err) } if fmt.Sprintf("%v", res) != fmt.Sprintf("%v", test) { t.Errorf("incorrect marshal/unmarshal; %v != %v", res, test) } } } type explicitTaggedTimeTest struct { Time time.Time `asn1:"explicit,tag:0"` } var explicitTaggedTimeTestData = []struct { in []byte out explicitTaggedTimeTest }{ {[]byte{0x30, 0x11, 0xa0, 0xf, 0x17, 0xd, '9', '1', '0', '5', '0', '6', '1', '6', '4', '5', '4', '0', 'Z'}, explicitTaggedTimeTest{time.Date(1991, 05, 06, 16, 45, 40, 0, time.UTC)}}, {[]byte{0x30, 0x17, 0xa0, 0xf, 0x18, 0x13, '2', '0', '1', '0', '0', '1', '0', '2', '0', '3', '0', '4', '0', '5', '+', '0', '6', '0', '7'}, explicitTaggedTimeTest{time.Date(2010, 01, 02, 03, 04, 05, 0, time.FixedZone("", 6*60*60+7*60))}}, } func TestExplicitTaggedTime(t *testing.T) { // Test that a time.Time will match either tagUTCTime or // tagGeneralizedTime. for i, test := range explicitTaggedTimeTestData { var got explicitTaggedTimeTest _, err := Unmarshal(test.in, &got) if err != nil { t.Errorf("Unmarshal failed at index %d %v", i, err) } if !got.Time.Equal(test.out.Time) { t.Errorf("#%d: got %v, want %v", i, got.Time, test.out.Time) } } } type implicitTaggedTimeTest struct { Time time.Time `asn1:"tag:24"` } func TestImplicitTaggedTime(t *testing.T) { // An implicitly tagged time value, that happens to have an implicit // tag equal to a GENERALIZEDTIME, should still be parsed as a UTCTime. // (There's no "timeType" in fieldParameters to determine what type of // time should be expected when implicitly tagged.) der := []byte{0x30, 0x0f, 0x80 | 24, 0xd, '9', '1', '0', '5', '0', '6', '1', '6', '4', '5', '4', '0', 'Z'} var result implicitTaggedTimeTest if _, err := Unmarshal(der, &result); err != nil { t.Fatalf("Error while parsing: %s", err) } if expected := time.Date(1991, 05, 06, 16, 45, 40, 0, time.UTC); !result.Time.Equal(expected) { t.Errorf("Wrong result. Got %v, want %v", result.Time, expected) } } type truncatedExplicitTagTest struct { Test int `asn1:"explicit,tag:0"` } func TestTruncatedExplicitTag(t *testing.T) { // This crashed Unmarshal in the past. See #11154. der := []byte{ 0x30, // SEQUENCE 0x02, // two bytes long 0xa0, // context-specific, tag 0 0x30, // 48 bytes long } var result truncatedExplicitTagTest if _, err := Unmarshal(der, &result); err == nil { t.Error("Unmarshal returned without error") } } type invalidUTF8Test struct { Str string `asn1:"utf8"` } func TestUnmarshalInvalidUTF8(t *testing.T) { data := []byte("0\x05\f\x03a\xc9c") var result invalidUTF8Test _, err := Unmarshal(data, &result) const expectedSubstring = "UTF" if err == nil { t.Fatal("Successfully unmarshaled invalid UTF-8 data") } else if !strings.Contains(err.Error(), expectedSubstring) { t.Fatalf("Expected error to mention %q but error was %q", expectedSubstring, err.Error()) } } func TestMarshalNilValue(t *testing.T) { nilValueTestData := []any{ nil, struct{ V any }{}, } for i, test := range nilValueTestData { if _, err := Marshal(test); err == nil { t.Fatalf("#%d: successfully marshaled nil value", i) } } } type unexported struct { X int y int } type exported struct { X int Y int } func TestUnexportedStructField(t *testing.T) { want := StructuralError{"struct contains unexported fields"} _, err := Marshal(unexported{X: 5, y: 1}) if err != want { t.Errorf("got %v, want %v", err, want) } bs, err := Marshal(exported{X: 5, Y: 1}) if err != nil { t.Fatal(err) } var u unexported _, err = Unmarshal(bs, &u) if err != want { t.Errorf("got %v, want %v", err, want) } } func TestNull(t *testing.T) { marshaled, err := Marshal(NullRawValue) if err != nil { t.Fatal(err) } if !bytes.Equal(NullBytes, marshaled) { t.Errorf("Expected Marshal of NullRawValue to yield %x, got %x", NullBytes, marshaled) } unmarshaled := RawValue{} if _, err := Unmarshal(NullBytes, &unmarshaled); err != nil { t.Fatal(err) } unmarshaled.FullBytes = NullRawValue.FullBytes if len(unmarshaled.Bytes) == 0 { // DeepEqual considers a nil slice and an empty slice to be different. unmarshaled.Bytes = NullRawValue.Bytes } if !reflect.DeepEqual(NullRawValue, unmarshaled) { t.Errorf("Expected Unmarshal of NullBytes to yield %v, got %v", NullRawValue, unmarshaled) } } func TestExplicitTagRawValueStruct(t *testing.T) { type foo struct { A RawValue `asn1:"optional,explicit,tag:5"` B []byte `asn1:"optional,explicit,tag:6"` } before := foo{B: []byte{1, 2, 3}} derBytes, err := Marshal(before) if err != nil { t.Fatal(err) } var after foo if rest, err := Unmarshal(derBytes, &after); err != nil || len(rest) != 0 { t.Fatal(err) } got := fmt.Sprintf("%#v", after) want := fmt.Sprintf("%#v", before) if got != want { t.Errorf("got %s, want %s (DER: %x)", got, want, derBytes) } } func TestTaggedRawValue(t *testing.T) { type taggedRawValue struct { A RawValue `asn1:"tag:5"` } type untaggedRawValue struct { A RawValue } const isCompound = 0x20 const tag = 5 tests := []struct { shouldMatch bool derBytes []byte }{ {false, []byte{0x30, 3, TagInteger, 1, 1}}, {true, []byte{0x30, 3, (ClassContextSpecific << 6) | tag, 1, 1}}, {true, []byte{0x30, 3, (ClassContextSpecific << 6) | tag | isCompound, 1, 1}}, {false, []byte{0x30, 3, (ClassApplication << 6) | tag | isCompound, 1, 1}}, {false, []byte{0x30, 3, (ClassPrivate << 6) | tag | isCompound, 1, 1}}, } for i, test := range tests { var tagged taggedRawValue if _, err := Unmarshal(test.derBytes, &tagged); (err == nil) != test.shouldMatch { t.Errorf("#%d: unexpected result parsing %x: %s", i, test.derBytes, err) } // An untagged RawValue should accept anything. var untagged untaggedRawValue if _, err := Unmarshal(test.derBytes, &untagged); err != nil { t.Errorf("#%d: unexpected failure parsing %x with untagged RawValue: %s", i, test.derBytes, err) } } } var bmpStringTests = []struct { decoded string encodedHex string }{ {"", "0000"}, // Example from https://tools.ietf.org/html/rfc7292#appendix-B. {"Beavis", "0042006500610076006900730000"}, // Some characters from the "Letterlike Symbols Unicode block". {"\u2115 - Double-struck N", "21150020002d00200044006f00750062006c0065002d00730074007200750063006b0020004e0000"}, } func TestBMPString(t *testing.T) { for i, test := range bmpStringTests { encoded, err := hex.DecodeString(test.encodedHex) if err != nil { t.Fatalf("#%d: failed to decode from hex string", i) } decoded, err := parseBMPString(encoded) if err != nil { t.Errorf("#%d: decoding output gave an error: %s", i, err) continue } if decoded != test.decoded { t.Errorf("#%d: decoding output resulted in %q, but it should have been %q", i, decoded, test.decoded) continue } } } func TestNonMinimalEncodedOID(t *testing.T) { h, err := hex.DecodeString("060a2a80864886f70d01010b") if err != nil { t.Fatalf("failed to decode from hex string: %s", err) } var oid ObjectIdentifier _, err = Unmarshal(h, &oid) if err == nil { t.Fatalf("accepted non-minimally encoded oid") } }