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// Copyright The Notary Project Authors.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package ber
import (
"reflect"
"testing"
"math"
)
func TestConvertToDER(t *testing.T) {
var testBytes = make([]byte, math.MaxInt8)
// primitive identifier
testBytes[0] = 0x1f
testBytes[1] = 0xa0
testBytes[2] = 0x20
// length
testBytes[3] = 0x84
testBytes[4] = 0xFF
testBytes[5] = 0xFF
testBytes[6] = 0xFF
testBytes[7] = 0xFF
type data struct {
name string
ber []byte
der []byte
expectError bool
}
testData := []data{
{
name: "Constructed value",
ber: []byte{
// Constructed value
0x30,
// Constructed value length
0x2e,
// Type identifier
0x06,
// Type length
0x09,
// Type content
0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01,
// Value identifier
0x04,
// Value length in BER
0x81, 0x20,
// Value content
0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,
0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,
0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55,
},
der: []byte{
// Constructed value
0x30,
// Constructed value length
0x2d,
// Type identifier
0x06,
// Type length
0x09,
// Type content
0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01,
// Value identifier
0x04,
// Value length in BER
0x20,
// Value content
0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,
0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,
0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55,
},
expectError: false,
},
{
name: "Primitive value",
ber: []byte{
// Primitive value
// identifier
0x1f, 0x20,
// length
0x81, 0x01,
// content
0x01,
},
der: []byte{
// Primitive value
// identifier
0x1f, 0x20,
// length
0x01,
// content
0x01,
},
expectError: false,
},
{
name: "Constructed value in constructed value",
ber: []byte{
// Constructed value
0x30,
// Constructed value length
0x2d,
// Constructed value identifier
0x26,
// Type length
0x2b,
// Value identifier
0x04,
// Value length in BER
0x81, 0x28,
// Value content
0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02,
0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,
0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,
0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55,
},
der: []byte{
// Constructed value
0x30,
// Constructed value length
0x2c,
// Constructed value identifier
0x26,
// Type length
0x2a,
// Value identifier
0x04,
// Value length in BER
0x28,
// Value content
0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02,
0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,
0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,
0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55,
},
expectError: false,
},
{
name: "empty",
ber: []byte{},
der: []byte{},
expectError: true,
},
{
name: "identifier high tag number form",
ber: []byte{
// Primitive value
// identifier
0x1f, 0xa0, 0x20,
// length
0x81, 0x01,
// content
0x01,
},
der: []byte{
// Primitive value
// identifier
0x1f, 0xa0, 0x20,
// length
0x01,
// content
0x01,
},
expectError: false,
},
{
name: "EarlyEOF for identifier high tag number form",
ber: []byte{
// Primitive value
// identifier
0x1f, 0xa0,
},
der: []byte{},
expectError: true,
},
{
name: "EarlyEOF for length",
ber: []byte{
// Primitive value
// identifier
0x1f, 0xa0, 0x20,
},
der: []byte{},
expectError: true,
},
{
name: "Unsupport indefinite-length",
ber: []byte{
// Primitive value
// identifier
0x1f, 0xa0, 0x20,
// length
0x80,
},
der: []byte{},
expectError: true,
},
{
name: "length greater than 4 bytes",
ber: []byte{
// Primitive value
// identifier
0x1f, 0xa0, 0x20,
// length
0x85,
},
der: []byte{},
expectError: true,
},
{
name: "long form length EarlyEOF ",
ber: []byte{
// Primitive value
// identifier
0x1f, 0xa0, 0x20,
// length
0x84,
},
der: []byte{},
expectError: true,
},
{
name: "length greater than content",
ber: []byte{
// Primitive value
// identifier
0x1f, 0xa0, 0x20,
// length
0x02,
},
der: []byte{},
expectError: true,
},
{
name: "trailing data",
ber: []byte{
// Primitive value
// identifier
0x1f, 0xa0, 0x20,
// length
0x02,
// content
0x01, 0x02, 0x03,
},
der: []byte{},
expectError: true,
},
{
name: "EarlyEOF in constructed value",
ber: []byte{
// Constructed value
0x30,
// Constructed value length
0x2c,
// Constructed value identifier
0x26,
// Type length
0x2b,
// Value identifier
0x04,
// Value length in BER
0x81, 0x28,
// Value content
0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02,
0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,
0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,
0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8,
},
expectError: true,
},
{
name: "length greater > int32",
ber: testBytes[:],
der: []byte{},
expectError: true,
},
{
name: "long form length greather than subsequent octets length ",
ber: []byte{
// Primitive value
// identifier
0x1f, 0xa0, 0x20,
// length
0x81, 0x09,
// content
0x01,
},
der: []byte{},
expectError: true,
},
}
for _, tt := range testData {
der, err := ConvertToDER(tt.ber)
if !tt.expectError && err != nil {
t.Errorf("ConvertToDER() error = %v, but expect no error", err)
return
}
if tt.expectError && err == nil {
t.Errorf("ConvertToDER() error = nil, but expect error")
}
if !tt.expectError && !reflect.DeepEqual(der, tt.der) {
t.Errorf("got = %v, want %v", der, tt.der)
}
}
}
func TestDecodeIdentifier(t *testing.T) {
t.Run("identifier is empty", func(t *testing.T) {
_, _, err := decodeIdentifier([]byte{})
if err == nil {
t.Errorf("decodeIdentifier() error = nil, but expect error")
}
})
}
func TestDecodeLength(t *testing.T) {
t.Run("length is empty", func(t *testing.T) {
_, _, err := decodeLength([]byte{})
if err == nil {
t.Errorf("decodeLength() error = nil, but expect error")
}
})
}
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