check hosts in ssl certificates

This commit is contained in:
Mikaël Cluseau
2018-08-09 15:07:53 +02:00
parent 481115e0d0
commit 331f9ea96c
362 changed files with 2499 additions and 59344 deletions

View File

@ -1,333 +0,0 @@
// 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"
"golang.org/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)
}
}
}

View File

@ -1,428 +0,0 @@
// 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"
"errors"
"fmt"
"testing"
)
func builderBytesEq(b *Builder, want ...byte) error {
got := b.BytesOrPanic()
if !bytes.Equal(got, want) {
return fmt.Errorf("Bytes() = %v, want %v", got, want)
}
return nil
}
func TestContinuationError(t *testing.T) {
const errorStr = "TestContinuationError"
var b Builder
b.AddUint8LengthPrefixed(func(b *Builder) {
b.AddUint8(1)
panic(BuildError{Err: errors.New(errorStr)})
})
ret, err := b.Bytes()
if ret != nil {
t.Error("expected nil result")
}
if err == nil {
t.Fatal("unexpected nil error")
}
if s := err.Error(); s != errorStr {
t.Errorf("expected error %q, got %v", errorStr, s)
}
}
func TestContinuationNonError(t *testing.T) {
defer func() {
recover()
}()
var b Builder
b.AddUint8LengthPrefixed(func(b *Builder) {
b.AddUint8(1)
panic(1)
})
t.Error("Builder did not panic")
}
func TestGeneratedPanic(t *testing.T) {
defer func() {
recover()
}()
var b Builder
b.AddUint8LengthPrefixed(func(b *Builder) {
var p *byte
*p = 0
})
t.Error("Builder did not panic")
}
func TestBytes(t *testing.T) {
var b Builder
v := []byte("foobarbaz")
b.AddBytes(v[0:3])
b.AddBytes(v[3:4])
b.AddBytes(v[4:9])
if err := builderBytesEq(&b, v...); err != nil {
t.Error(err)
}
s := String(b.BytesOrPanic())
for _, w := range []string{"foo", "bar", "baz"} {
var got []byte
if !s.ReadBytes(&got, 3) {
t.Errorf("ReadBytes() = false, want true (w = %v)", w)
}
want := []byte(w)
if !bytes.Equal(got, want) {
t.Errorf("ReadBytes(): got = %v, want %v", got, want)
}
}
if len(s) != 0 {
t.Errorf("len(s) = %d, want 0", len(s))
}
}
func TestUint8(t *testing.T) {
var b Builder
b.AddUint8(42)
if err := builderBytesEq(&b, 42); err != nil {
t.Error(err)
}
var s String = b.BytesOrPanic()
var v uint8
if !s.ReadUint8(&v) {
t.Error("ReadUint8() = false, want true")
}
if v != 42 {
t.Errorf("v = %d, want 42", v)
}
if len(s) != 0 {
t.Errorf("len(s) = %d, want 0", len(s))
}
}
func TestUint16(t *testing.T) {
var b Builder
b.AddUint16(65534)
if err := builderBytesEq(&b, 255, 254); err != nil {
t.Error(err)
}
var s String = b.BytesOrPanic()
var v uint16
if !s.ReadUint16(&v) {
t.Error("ReadUint16() == false, want true")
}
if v != 65534 {
t.Errorf("v = %d, want 65534", v)
}
if len(s) != 0 {
t.Errorf("len(s) = %d, want 0", len(s))
}
}
func TestUint24(t *testing.T) {
var b Builder
b.AddUint24(0xfffefd)
if err := builderBytesEq(&b, 255, 254, 253); err != nil {
t.Error(err)
}
var s String = b.BytesOrPanic()
var v uint32
if !s.ReadUint24(&v) {
t.Error("ReadUint8() = false, want true")
}
if v != 0xfffefd {
t.Errorf("v = %d, want fffefd", v)
}
if len(s) != 0 {
t.Errorf("len(s) = %d, want 0", len(s))
}
}
func TestUint24Truncation(t *testing.T) {
var b Builder
b.AddUint24(0x10111213)
if err := builderBytesEq(&b, 0x11, 0x12, 0x13); err != nil {
t.Error(err)
}
}
func TestUint32(t *testing.T) {
var b Builder
b.AddUint32(0xfffefdfc)
if err := builderBytesEq(&b, 255, 254, 253, 252); err != nil {
t.Error(err)
}
var s String = b.BytesOrPanic()
var v uint32
if !s.ReadUint32(&v) {
t.Error("ReadUint8() = false, want true")
}
if v != 0xfffefdfc {
t.Errorf("v = %x, want fffefdfc", v)
}
if len(s) != 0 {
t.Errorf("len(s) = %d, want 0", len(s))
}
}
func TestUMultiple(t *testing.T) {
var b Builder
b.AddUint8(23)
b.AddUint32(0xfffefdfc)
b.AddUint16(42)
if err := builderBytesEq(&b, 23, 255, 254, 253, 252, 0, 42); err != nil {
t.Error(err)
}
var s String = b.BytesOrPanic()
var (
x uint8
y uint32
z uint16
)
if !s.ReadUint8(&x) || !s.ReadUint32(&y) || !s.ReadUint16(&z) {
t.Error("ReadUint8() = false, want true")
}
if x != 23 || y != 0xfffefdfc || z != 42 {
t.Errorf("x, y, z = %d, %d, %d; want 23, 4294901244, 5", x, y, z)
}
if len(s) != 0 {
t.Errorf("len(s) = %d, want 0", len(s))
}
}
func TestUint8LengthPrefixedSimple(t *testing.T) {
var b Builder
b.AddUint8LengthPrefixed(func(c *Builder) {
c.AddUint8(23)
c.AddUint8(42)
})
if err := builderBytesEq(&b, 2, 23, 42); err != nil {
t.Error(err)
}
var base, child String = b.BytesOrPanic(), nil
var x, y uint8
if !base.ReadUint8LengthPrefixed(&child) || !child.ReadUint8(&x) ||
!child.ReadUint8(&y) {
t.Error("parsing failed")
}
if x != 23 || y != 42 {
t.Errorf("want x, y == 23, 42; got %d, %d", x, y)
}
if len(base) != 0 {
t.Errorf("len(base) = %d, want 0", len(base))
}
if len(child) != 0 {
t.Errorf("len(child) = %d, want 0", len(child))
}
}
func TestUint8LengthPrefixedMulti(t *testing.T) {
var b Builder
b.AddUint8LengthPrefixed(func(c *Builder) {
c.AddUint8(23)
c.AddUint8(42)
})
b.AddUint8(5)
b.AddUint8LengthPrefixed(func(c *Builder) {
c.AddUint8(123)
c.AddUint8(234)
})
if err := builderBytesEq(&b, 2, 23, 42, 5, 2, 123, 234); err != nil {
t.Error(err)
}
var s, child String = b.BytesOrPanic(), nil
var u, v, w, x, y uint8
if !s.ReadUint8LengthPrefixed(&child) || !child.ReadUint8(&u) || !child.ReadUint8(&v) ||
!s.ReadUint8(&w) || !s.ReadUint8LengthPrefixed(&child) || !child.ReadUint8(&x) || !child.ReadUint8(&y) {
t.Error("parsing failed")
}
if u != 23 || v != 42 || w != 5 || x != 123 || y != 234 {
t.Errorf("u, v, w, x, y = %d, %d, %d, %d, %d; want 23, 42, 5, 123, 234",
u, v, w, x, y)
}
if len(s) != 0 {
t.Errorf("len(s) = %d, want 0", len(s))
}
if len(child) != 0 {
t.Errorf("len(child) = %d, want 0", len(child))
}
}
func TestUint8LengthPrefixedNested(t *testing.T) {
var b Builder
b.AddUint8LengthPrefixed(func(c *Builder) {
c.AddUint8(5)
c.AddUint8LengthPrefixed(func(d *Builder) {
d.AddUint8(23)
d.AddUint8(42)
})
c.AddUint8(123)
})
if err := builderBytesEq(&b, 5, 5, 2, 23, 42, 123); err != nil {
t.Error(err)
}
var base, child1, child2 String = b.BytesOrPanic(), nil, nil
var u, v, w, x uint8
if !base.ReadUint8LengthPrefixed(&child1) {
t.Error("parsing base failed")
}
if !child1.ReadUint8(&u) || !child1.ReadUint8LengthPrefixed(&child2) || !child1.ReadUint8(&x) {
t.Error("parsing child1 failed")
}
if !child2.ReadUint8(&v) || !child2.ReadUint8(&w) {
t.Error("parsing child2 failed")
}
if u != 5 || v != 23 || w != 42 || x != 123 {
t.Errorf("u, v, w, x = %d, %d, %d, %d, want 5, 23, 42, 123",
u, v, w, x)
}
if len(base) != 0 {
t.Errorf("len(base) = %d, want 0", len(base))
}
if len(child1) != 0 {
t.Errorf("len(child1) = %d, want 0", len(child1))
}
if len(base) != 0 {
t.Errorf("len(child2) = %d, want 0", len(child2))
}
}
func TestPreallocatedBuffer(t *testing.T) {
var buf [5]byte
b := NewBuilder(buf[0:0])
b.AddUint8(1)
b.AddUint8LengthPrefixed(func(c *Builder) {
c.AddUint8(3)
c.AddUint8(4)
})
b.AddUint16(1286) // Outgrow buf by one byte.
want := []byte{1, 2, 3, 4, 0}
if !bytes.Equal(buf[:], want) {
t.Errorf("buf = %v want %v", buf, want)
}
if err := builderBytesEq(b, 1, 2, 3, 4, 5, 6); err != nil {
t.Error(err)
}
}
func TestWriteWithPendingChild(t *testing.T) {
var b Builder
b.AddUint8LengthPrefixed(func(c *Builder) {
c.AddUint8LengthPrefixed(func(d *Builder) {
defer func() {
if recover() == nil {
t.Errorf("recover() = nil, want error; c.AddUint8() did not panic")
}
}()
c.AddUint8(2) // panics
defer func() {
if recover() == nil {
t.Errorf("recover() = nil, want error; b.AddUint8() did not panic")
}
}()
b.AddUint8(2) // panics
})
defer func() {
if recover() == nil {
t.Errorf("recover() = nil, want error; b.AddUint8() did not panic")
}
}()
b.AddUint8(2) // panics
})
}
// ASN.1
func TestASN1Int64(t *testing.T) {
tests := []struct {
in int64
want []byte
}{
{-0x800000, []byte{2, 3, 128, 0, 0}},
{-256, []byte{2, 2, 255, 0}},
{-129, []byte{2, 2, 255, 127}},
{-128, []byte{2, 1, 128}},
{-1, []byte{2, 1, 255}},
{0, []byte{2, 1, 0}},
{1, []byte{2, 1, 1}},
{2, []byte{2, 1, 2}},
{127, []byte{2, 1, 127}},
{128, []byte{2, 2, 0, 128}},
{256, []byte{2, 2, 1, 0}},
{0x800000, []byte{2, 4, 0, 128, 0, 0}},
}
for i, tt := range tests {
var b Builder
b.AddASN1Int64(tt.in)
if err := builderBytesEq(&b, tt.want...); err != nil {
t.Errorf("%v, (i = %d; in = %v)", err, i, tt.in)
}
var n int64
s := String(b.BytesOrPanic())
ok := s.ReadASN1Integer(&n)
if !ok || n != tt.in {
t.Errorf("s.ReadASN1Integer(&n) = %v, n = %d; want true, n = %d (i = %d)",
ok, n, tt.in, i)
}
if len(s) != 0 {
t.Errorf("len(s) = %d, want 0", len(s))
}
}
}
func TestASN1Uint64(t *testing.T) {
tests := []struct {
in uint64
want []byte
}{
{0, []byte{2, 1, 0}},
{1, []byte{2, 1, 1}},
{2, []byte{2, 1, 2}},
{127, []byte{2, 1, 127}},
{128, []byte{2, 2, 0, 128}},
{256, []byte{2, 2, 1, 0}},
{0x800000, []byte{2, 4, 0, 128, 0, 0}},
{0x7fffffffffffffff, []byte{2, 8, 127, 255, 255, 255, 255, 255, 255, 255}},
{0x8000000000000000, []byte{2, 9, 0, 128, 0, 0, 0, 0, 0, 0, 0}},
{0xffffffffffffffff, []byte{2, 9, 0, 255, 255, 255, 255, 255, 255, 255, 255}},
}
for i, tt := range tests {
var b Builder
b.AddASN1Uint64(tt.in)
if err := builderBytesEq(&b, tt.want...); err != nil {
t.Errorf("%v, (i = %d; in = %v)", err, i, tt.in)
}
var n uint64
s := String(b.BytesOrPanic())
ok := s.ReadASN1Integer(&n)
if !ok || n != tt.in {
t.Errorf("s.ReadASN1Integer(&n) = %v, n = %d; want true, n = %d (i = %d)",
ok, n, tt.in, i)
}
if len(s) != 0 {
t.Errorf("len(s) = %d, want 0", len(s))
}
}
}

View File

@ -1,154 +0,0 @@
// 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_test
import (
"errors"
"fmt"
"golang.org/x/crypto/cryptobyte"
"golang.org/x/crypto/cryptobyte/asn1"
)
func ExampleString_lengthPrefixed() {
// This is an example of parsing length-prefixed data (as found in, for
// example, TLS). Imagine a 16-bit prefixed series of 8-bit prefixed
// strings.
input := cryptobyte.String([]byte{0, 12, 5, 'h', 'e', 'l', 'l', 'o', 5, 'w', 'o', 'r', 'l', 'd'})
var result []string
var values cryptobyte.String
if !input.ReadUint16LengthPrefixed(&values) ||
!input.Empty() {
panic("bad format")
}
for !values.Empty() {
var value cryptobyte.String
if !values.ReadUint8LengthPrefixed(&value) {
panic("bad format")
}
result = append(result, string(value))
}
// Output: []string{"hello", "world"}
fmt.Printf("%#v\n", result)
}
func ExampleString_aSN1() {
// This is an example of parsing ASN.1 data that looks like:
// Foo ::= SEQUENCE {
// version [6] INTEGER DEFAULT 0
// data OCTET STRING
// }
input := cryptobyte.String([]byte{0x30, 12, 0xa6, 3, 2, 1, 2, 4, 5, 'h', 'e', 'l', 'l', 'o'})
var (
version int64
data, inner, versionBytes cryptobyte.String
haveVersion bool
)
if !input.ReadASN1(&inner, asn1.SEQUENCE) ||
!input.Empty() ||
!inner.ReadOptionalASN1(&versionBytes, &haveVersion, asn1.Tag(6).Constructed().ContextSpecific()) ||
(haveVersion && !versionBytes.ReadASN1Integer(&version)) ||
(haveVersion && !versionBytes.Empty()) ||
!inner.ReadASN1(&data, asn1.OCTET_STRING) ||
!inner.Empty() {
panic("bad format")
}
// Output: haveVersion: true, version: 2, data: hello
fmt.Printf("haveVersion: %t, version: %d, data: %s\n", haveVersion, version, string(data))
}
func ExampleBuilder_aSN1() {
// This is an example of building ASN.1 data that looks like:
// Foo ::= SEQUENCE {
// version [6] INTEGER DEFAULT 0
// data OCTET STRING
// }
version := int64(2)
data := []byte("hello")
const defaultVersion = 0
var b cryptobyte.Builder
b.AddASN1(asn1.SEQUENCE, func(b *cryptobyte.Builder) {
if version != defaultVersion {
b.AddASN1(asn1.Tag(6).Constructed().ContextSpecific(), func(b *cryptobyte.Builder) {
b.AddASN1Int64(version)
})
}
b.AddASN1OctetString(data)
})
result, err := b.Bytes()
if err != nil {
panic(err)
}
// Output: 300ca603020102040568656c6c6f
fmt.Printf("%x\n", result)
}
func ExampleBuilder_lengthPrefixed() {
// This is an example of building length-prefixed data (as found in,
// for example, TLS). Imagine a 16-bit prefixed series of 8-bit
// prefixed strings.
input := []string{"hello", "world"}
var b cryptobyte.Builder
b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) {
for _, value := range input {
b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) {
b.AddBytes([]byte(value))
})
}
})
result, err := b.Bytes()
if err != nil {
panic(err)
}
// Output: 000c0568656c6c6f05776f726c64
fmt.Printf("%x\n", result)
}
func ExampleBuilder_lengthPrefixOverflow() {
// Writing more data that can be expressed by the length prefix results
// in an error from Bytes().
tooLarge := make([]byte, 256)
var b cryptobyte.Builder
b.AddUint8LengthPrefixed(func(b *cryptobyte.Builder) {
b.AddBytes(tooLarge)
})
result, err := b.Bytes()
fmt.Printf("len=%d err=%s\n", len(result), err)
// Output: len=0 err=cryptobyte: pending child length 256 exceeds 1-byte length prefix
}
func ExampleBuilderContinuation_errorHandling() {
var b cryptobyte.Builder
// Continuations that panic with a BuildError will cause Bytes to
// return the inner error.
b.AddUint16LengthPrefixed(func(b *cryptobyte.Builder) {
b.AddUint32(0)
panic(cryptobyte.BuildError{Err: errors.New("example error")})
})
result, err := b.Bytes()
fmt.Printf("len=%d err=%s\n", len(result), err)
// Output: len=0 err=example error
}