public void DnsRecordFactory_DsRecord() { var expectedDigest = "3490A6806D47F17A34C29E2CE80E8A999FFBE4BE"; var expectedBytes = Enumerable.Range(0, expectedDigest.Length) .Where(x => x % 2 == 0) .Select(x => Convert.ToByte(expectedDigest.Substring(x, 2), 16)) .ToArray(); var name = DnsString.Parse("example.com"); var writer = new DnsDatagramWriter(); writer.WriteInt16NetworkOrder(31589); writer.WriteByte(8); // algorithm writer.WriteByte(1); // type writer.WriteBytes(expectedBytes, expectedBytes.Length); var factory = GetFactory(writer.Data.ToArray()); var info = new ResourceRecordInfo(name, ResourceRecordType.DS, QueryClass.IN, 0, writer.Data.Count); var result = factory.GetRecord(info) as DsRecord; Assert.Equal(expectedBytes, result.Digest); Assert.Equal(expectedDigest, result.DigestAsString); Assert.Equal(31589, result.KeyTag); Assert.Equal(8, (int)result.Algorithm); Assert.Equal(1, result.DigestType); }
private static byte[] GetResponseBytes(DnsQueryResponse message, byte[] answerData) { using (var writer = new DnsDatagramWriter()) { writer.WriteUInt16NetworkOrder((ushort)message.Header.Id); writer.WriteUInt16NetworkOrder((ushort)message.Header.HeaderFlags); // lets iterate answers only, makse it easier //writer.WriteUInt16Network((ushort)message.Header.QuestionCount); writer.WriteUInt16NetworkOrder(0); writer.WriteUInt16NetworkOrder(1); //writer.WriteUInt16Network((ushort)message.Header.NameServerCount); writer.WriteUInt16NetworkOrder(0); //writer.WriteUInt16Network((ushort)message.Header.AdditionalCount); writer.WriteUInt16NetworkOrder(0); var answer = message.Answers.First(); writer.WriteHostName(answer.DomainName.Value); writer.WriteUInt16NetworkOrder((ushort)answer.RecordType); writer.WriteUInt16NetworkOrder((ushort)answer.RecordClass); writer.WriteUInt32NetworkOrder((uint)answer.TimeToLive); writer.WriteUInt16NetworkOrder((ushort)answerData.Length); //writer.Extend(answerData.Length); // the following data->length writer.WriteBytes(answerData, answerData.Length); return(writer.Data.ToArray()); } }
public void DnsRecordFactory_SRVRecord() { var name = DnsString.Parse("result.example.com"); using (var pool = new PooledBytes(DnsDatagramWriter.BufferSize)) { var writer = new DnsDatagramWriter(new ArraySegment <byte>(pool.Buffer)); writer.WriteBytes( new byte[] { 0, 1, 1, 0, 2, 3 }, 6); writer.WriteHostName(name.Value); var factory = GetFactory( writer.Data.ToArray(), out var reader); var info = new ResourceRecord( DnsString.Parse("query.example.com"), SrvRecord.ResourceRecordType, QueryClass.In, 0, writer.Data.Count); var result = factory.GetRecord( info, reader) as SrvRecord ?? throw new Exception(); Assert.Equal( result.Target, name); Assert.True(result.Priority == 1); Assert.True(result.Weight == 256); Assert.True(result.Port == 515); } }
public ArraySegment <byte> BlockCopyLarge() { using (var writer = new DnsDatagramWriter()) { writer.WriteBytes(sourceBig, sourceBig.Length); return(writer.Data); } }
public void DnsRecordFactory_SRVRecord() { var name = DnsString.Parse("result.example.com"); var writer = new DnsDatagramWriter(); writer.WriteBytes(new byte[] { 0, 1, 1, 0, 2, 3 }, 6); writer.WriteHostName(name.Value); var factory = GetFactory(writer.Data.ToArray()); var info = new ResourceRecordInfo("query.example.com", ResourceRecordType.SRV, QueryClass.IN, 0, writer.Data.Count); var result = factory.GetRecord(info) as SrvRecord; Assert.Equal(result.Target, name); Assert.True(result.Priority == 1); Assert.True(result.Weight == 256); Assert.True(result.Port == 515); }
public void DnsRecordFactory_RRSIGRecord() { var type = ResourceRecordType.NSEC; var algorithmNumber = DnsSecurityAlgorithm.ECDSAP256SHA256; var labels = 5; var originalTtl = 300; var signatureExpiration = 1589414400; var signatureInception = 1587600000; short keytag = 3942; var signersName = DnsString.Parse("result.example.com"); var signatureString = "kfyyKQoPZJFyOFSDqav7wj5XNRPqZssV2K2k8MJun28QSsCMHyWOjw9Hk4KofnEIUWNui3mMgAEFYbwoeRKkMf5uDAh6ryJ4veQNj86mgYJrpJppUplqlqJE8o1bx0I1VfwheL+M23bL5MnqSGiI5igmMDyeVUraVOO4RQyfGN0="; var signature = Convert.FromBase64String(signatureString); var writer = new DnsDatagramWriter(); writer.WriteInt16NetworkOrder((short)type); writer.WriteByte((byte)algorithmNumber); writer.WriteByte((byte)labels); writer.WriteInt32NetworkOrder(originalTtl); writer.WriteInt32NetworkOrder(signatureExpiration); writer.WriteInt32NetworkOrder(signatureInception); writer.WriteInt16NetworkOrder(keytag); writer.WriteHostName(signersName.Value); writer.WriteBytes(signature, signature.Length); var factory = GetFactory(writer.Data.ToArray()); var info = new ResourceRecordInfo("query.example.com", ResourceRecordType.RRSIG, QueryClass.IN, 0, writer.Data.Count); var result = factory.GetRecord(info) as RRSigRecord; Assert.Equal(type, result.CoveredType); Assert.Equal(algorithmNumber, result.Algorithm); Assert.Equal(labels, result.Labels); Assert.Equal(originalTtl, result.OriginalTtl); Assert.Equal(DateTimeOffset.FromUnixTimeSeconds(signatureExpiration), result.SignatureExpiration); Assert.Equal(DateTimeOffset.FromUnixTimeSeconds(signatureInception), result.SignatureInception); Assert.Equal(signersName.Value, result.SignersName); Assert.Equal(signature, result.Signature); Assert.Equal(signatureString, result.SignatureAsString); }
public void DnsRecordFactory_DnsKeyRecord() { var expectedPublicKey = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; var expectedBytes = Encoding.UTF8.GetBytes(expectedPublicKey); var name = DnsString.Parse("example.com"); var writer = new DnsDatagramWriter(); writer.WriteInt16NetworkOrder(256); writer.WriteByte(3); writer.WriteByte((byte)DnsSecurityAlgorithm.RSASHA256); writer.WriteBytes(expectedBytes, expectedBytes.Length); var factory = GetFactory(writer.Data.ToArray()); var info = new ResourceRecordInfo(name, ResourceRecordType.DNSKEY, QueryClass.IN, 0, writer.Data.Count); var result = factory.GetRecord(info) as DnsKeyRecord; Assert.Equal(expectedBytes, result.PublicKey); Assert.Equal(256, result.Flags); Assert.Equal(3, result.Protocol); Assert.Equal(DnsSecurityAlgorithm.RSASHA256, result.Algorithm); }