// Copyright 2011 Mark Cavage <mcavage@gmail.com> All rights reserved.
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const { test } = require('tap')
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const BerWriter = require('./writer')
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test('write byte', function (t) {
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const writer = new BerWriter()
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writer.writeByte(0xC2)
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 1, 'Wrong length')
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t.equal(ber[0], 0xC2, 'value wrong')
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t.end()
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})
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test('write 1 byte int', function (t) {
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const writer = new BerWriter()
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writer.writeInt(0x7f)
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 3, 'Wrong length for an int: ' + ber.length)
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t.equal(ber[0], 0x02, 'ASN.1 tag wrong (2) -> ' + ber[0])
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t.equal(ber[1], 0x01, 'length wrong(1) -> ' + ber[1])
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t.equal(ber[2], 0x7f, 'value wrong(3) -> ' + ber[2])
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t.end()
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})
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test('write 2 byte int', function (t) {
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const writer = new BerWriter()
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writer.writeInt(0x7ffe)
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 4, 'Wrong length for an int')
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t.equal(ber[0], 0x02, 'ASN.1 tag wrong')
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t.equal(ber[1], 0x02, 'length wrong')
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t.equal(ber[2], 0x7f, 'value wrong (byte 1)')
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t.equal(ber[3], 0xfe, 'value wrong (byte 2)')
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t.end()
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})
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test('write 3 byte int', function (t) {
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const writer = new BerWriter()
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writer.writeInt(0x7ffffe)
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 5, 'Wrong length for an int')
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t.equal(ber[0], 0x02, 'ASN.1 tag wrong')
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t.equal(ber[1], 0x03, 'length wrong')
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t.equal(ber[2], 0x7f, 'value wrong (byte 1)')
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t.equal(ber[3], 0xff, 'value wrong (byte 2)')
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t.equal(ber[4], 0xfe, 'value wrong (byte 3)')
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t.end()
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})
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test('write 4 byte int', function (t) {
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const writer = new BerWriter()
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writer.writeInt(0x7ffffffe)
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 6, 'Wrong length for an int')
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t.equal(ber[0], 0x02, 'ASN.1 tag wrong')
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t.equal(ber[1], 0x04, 'length wrong')
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t.equal(ber[2], 0x7f, 'value wrong (byte 1)')
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t.equal(ber[3], 0xff, 'value wrong (byte 2)')
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t.equal(ber[4], 0xff, 'value wrong (byte 3)')
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t.equal(ber[5], 0xfe, 'value wrong (byte 4)')
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t.end()
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})
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test('write 1 byte negative int', function (t) {
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const writer = new BerWriter()
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writer.writeInt(-128)
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 3, 'Wrong length for an int')
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t.equal(ber[0], 0x02, 'ASN.1 tag wrong')
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t.equal(ber[1], 0x01, 'length wrong')
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t.equal(ber[2], 0x80, 'value wrong (byte 1)')
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t.end()
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})
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test('write 2 byte negative int', function (t) {
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const writer = new BerWriter()
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writer.writeInt(-22400)
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 4, 'Wrong length for an int')
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t.equal(ber[0], 0x02, 'ASN.1 tag wrong')
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t.equal(ber[1], 0x02, 'length wrong')
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t.equal(ber[2], 0xa8, 'value wrong (byte 1)')
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t.equal(ber[3], 0x80, 'value wrong (byte 2)')
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t.end()
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})
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test('write 3 byte negative int', function (t) {
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const writer = new BerWriter()
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writer.writeInt(-481653)
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 5, 'Wrong length for an int')
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t.equal(ber[0], 0x02, 'ASN.1 tag wrong')
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t.equal(ber[1], 0x03, 'length wrong')
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t.equal(ber[2], 0xf8, 'value wrong (byte 1)')
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t.equal(ber[3], 0xa6, 'value wrong (byte 2)')
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t.equal(ber[4], 0x8b, 'value wrong (byte 3)')
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t.end()
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})
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test('write 4 byte negative int', function (t) {
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const writer = new BerWriter()
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writer.writeInt(-1522904131)
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 6, 'Wrong length for an int')
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t.equal(ber[0], 0x02, 'ASN.1 tag wrong')
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t.equal(ber[1], 0x04, 'length wrong')
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t.equal(ber[2], 0xa5, 'value wrong (byte 1)')
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t.equal(ber[3], 0x3a, 'value wrong (byte 2)')
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t.equal(ber[4], 0x53, 'value wrong (byte 3)')
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t.equal(ber[5], 0xbd, 'value wrong (byte 4)')
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t.end()
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})
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test('write boolean', function (t) {
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const writer = new BerWriter()
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writer.writeBoolean(true)
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writer.writeBoolean(false)
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 6, 'Wrong length')
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t.equal(ber[0], 0x01, 'tag wrong')
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t.equal(ber[1], 0x01, 'length wrong')
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t.equal(ber[2], 0xff, 'value wrong')
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t.equal(ber[3], 0x01, 'tag wrong')
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t.equal(ber[4], 0x01, 'length wrong')
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t.equal(ber[5], 0x00, 'value wrong')
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t.end()
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})
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test('write string', function (t) {
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const writer = new BerWriter()
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writer.writeString('hello world')
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 13, 'wrong length')
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t.equal(ber[0], 0x04, 'wrong tag')
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t.equal(ber[1], 11, 'wrong length')
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t.equal(ber.slice(2).toString('utf8'), 'hello world', 'wrong value')
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t.end()
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})
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test('write buffer', function (t) {
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const writer = new BerWriter()
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// write some stuff to start with
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writer.writeString('hello world')
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let ber = writer.buffer
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const buf = Buffer.from([0x04, 0x0b, 0x30, 0x09, 0x02, 0x01, 0x0f, 0x01, 0x01,
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0xff, 0x01, 0x01, 0xff])
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writer.writeBuffer(buf.slice(2, buf.length), 0x04)
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ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 26, 'wrong length')
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t.equal(ber[0], 0x04, 'wrong tag')
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t.equal(ber[1], 11, 'wrong length')
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t.equal(ber.slice(2, 13).toString('utf8'), 'hello world', 'wrong value')
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t.equal(ber[13], buf[0], 'wrong tag')
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t.equal(ber[14], buf[1], 'wrong length')
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for (let i = 13, j = 0; i < ber.length && j < buf.length; i++, j++) {
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t.equal(ber[i], buf[j], 'buffer contents not identical')
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}
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t.end()
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})
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test('write string array', function (t) {
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const writer = new BerWriter()
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writer.writeStringArray(['hello world', 'fubar!'])
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 21, 'wrong length')
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t.equal(ber[0], 0x04, 'wrong tag')
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t.equal(ber[1], 11, 'wrong length')
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t.equal(ber.slice(2, 13).toString('utf8'), 'hello world', 'wrong value')
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t.equal(ber[13], 0x04, 'wrong tag')
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t.equal(ber[14], 6, 'wrong length')
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t.equal(ber.slice(15).toString('utf8'), 'fubar!', 'wrong value')
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t.end()
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})
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test('resize internal buffer', function (t) {
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const writer = new BerWriter({ size: 2 })
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writer.writeString('hello world')
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 13, 'wrong length')
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t.equal(ber[0], 0x04, 'wrong tag')
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t.equal(ber[1], 11, 'wrong length')
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t.equal(ber.slice(2).toString('utf8'), 'hello world', 'wrong value')
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t.end()
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})
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test('sequence', function (t) {
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const writer = new BerWriter({ size: 25 })
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writer.startSequence()
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writer.writeString('hello world')
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writer.endSequence()
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 15, 'wrong length')
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t.equal(ber[0], 0x30, 'wrong tag')
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t.equal(ber[1], 13, 'wrong length')
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t.equal(ber[2], 0x04, 'wrong tag')
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t.equal(ber[3], 11, 'wrong length')
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t.equal(ber.slice(4).toString('utf8'), 'hello world', 'wrong value')
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t.end()
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})
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test('nested sequence', function (t) {
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const writer = new BerWriter({ size: 25 })
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writer.startSequence()
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writer.writeString('hello world')
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writer.startSequence()
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writer.writeString('hello world')
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writer.endSequence()
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writer.endSequence()
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 30, 'wrong length')
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t.equal(ber[0], 0x30, 'wrong tag')
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t.equal(ber[1], 28, 'wrong length')
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t.equal(ber[2], 0x04, 'wrong tag')
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t.equal(ber[3], 11, 'wrong length')
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t.equal(ber.slice(4, 15).toString('utf8'), 'hello world', 'wrong value')
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t.equal(ber[15], 0x30, 'wrong tag')
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t.equal(ber[16], 13, 'wrong length')
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t.equal(ber[17], 0x04, 'wrong tag')
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t.equal(ber[18], 11, 'wrong length')
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t.equal(ber.slice(19, 30).toString('utf8'), 'hello world', 'wrong value')
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t.end()
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})
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test('LDAP bind message', function (t) {
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const dn = 'cn=foo,ou=unit,o=test'
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const writer = new BerWriter()
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writer.startSequence()
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writer.writeInt(3) // msgid = 3
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writer.startSequence(0x60) // ldap bind
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writer.writeInt(3) // ldap v3
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writer.writeString(dn)
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writer.writeByte(0x80)
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writer.writeByte(0x00)
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writer.endSequence()
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writer.endSequence()
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const ber = writer.buffer
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t.ok(ber)
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t.equal(ber.length, 35, 'wrong length (buffer)')
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t.equal(ber[0], 0x30, 'wrong tag')
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t.equal(ber[1], 33, 'wrong length')
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t.equal(ber[2], 0x02, 'wrong tag')
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t.equal(ber[3], 1, 'wrong length')
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t.equal(ber[4], 0x03, 'wrong value')
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t.equal(ber[5], 0x60, 'wrong tag')
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t.equal(ber[6], 28, 'wrong length')
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t.equal(ber[7], 0x02, 'wrong tag')
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t.equal(ber[8], 1, 'wrong length')
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t.equal(ber[9], 0x03, 'wrong value')
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t.equal(ber[10], 0x04, 'wrong tag')
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t.equal(ber[11], dn.length, 'wrong length')
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t.equal(ber.slice(12, 33).toString('utf8'), dn, 'wrong value')
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t.equal(ber[33], 0x80, 'wrong tag')
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t.equal(ber[34], 0x00, 'wrong len')
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t.end()
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})
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test('Write OID', function (t) {
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const oid = '1.2.840.113549.1.1.1'
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const writer = new BerWriter()
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writer.writeOID(oid)
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const expected = Buffer.from([0x06, 0x09, 0x2a, 0x86,
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0x48, 0x86, 0xf7, 0x0d,
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0x01, 0x01, 0x01])
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const ber = writer.buffer
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t.equal(ber.compare(expected), 0)
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t.end()
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})
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test('appendBuffer appends a buffer', async t => {
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const expected = Buffer.from([0x04, 0x03, 0x66, 0x6f, 0x6f, 0x66, 0x6f, 0x6f])
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const writer = new BerWriter()
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writer.writeString('foo')
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writer.appendBuffer(Buffer.from('foo'))
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t.equal(Buffer.compare(writer.buffer, expected), 0)
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})
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