/// <summary>
/// Constructs an instance out of the algorithm, inception, expiration, mode, error, key and other fields.
/// </summary>
/// <param name="algorithm">
/// Name of the algorithm in domain name syntax.
/// The algorithm determines how the secret keying material agreed to using the TKEY RR is actually used to derive the algorithm specific key.
/// </param>
/// <param name="inception">
/// Number of seconds since the beginning of 1 January 1970 GMT ignoring leap seconds treated as modulo 2**32 using ring arithmetic.
/// In messages between a DNS resolver and a DNS server where this field is meaningful,
/// it is either the requested validity interval start for the keying material asked for or
/// specify the validity interval start of keying material provided.
///
/// To avoid different interpretations of the inception time in TKEY RRs,
/// resolvers and servers exchanging them must have the same idea of what time it is.
/// One way of doing this is with the NTP protocol [RFC 2030] but that or any other time synchronization used for this purpose must be done securely.
/// </param>
/// <param name="expiration">
/// Number of seconds since the beginning of 1 January 1970 GMT ignoring leap seconds treated as modulo 2**32 using ring arithmetic.
/// In messages between a DNS resolver and a DNS server where this field is meaningful,
/// it is either the requested validity interval end for the keying material asked for or
/// specify the validity interval end of keying material provided.
///
/// To avoid different interpretations of the expiration time in TKEY RRs,
/// resolvers and servers exchanging them must have the same idea of what time it is.
/// One way of doing this is with the NTP protocol [RFC 2030] but that or any other time synchronization used for this purpose must be done securely.
/// </param>
/// <param name="mode">
/// Specifies the general scheme for key agreement or the purpose of the TKEY DNS message.
/// Servers and resolvers supporting this specification must implement the Diffie-Hellman key agreement mode and the key deletion mode for queries.
/// All other modes are optional.
/// A server supporting TKEY that receives a TKEY request with a mode it does not support returns the BADMODE error.
/// </param>
/// <param name="error">
/// When the TKEY Error Field is non-zero in a response to a TKEY query, the DNS header RCODE field indicates no error.
/// However, it is possible if a TKEY is spontaneously included in a response the TKEY RR and DNS header error field
/// could have unrelated non-zero error codes.
/// </param>
/// <param name="key">The key exchange data. The meaning of this data depends on the mode.</param>
/// <param name="other">May be used in future extensions.</param>
public DnsResourceDataTransactionKey(DnsDomainName algorithm, SerialNumber32 inception, SerialNumber32 expiration, DnsTransactionKeyMode mode,
DnsResponseCode error, DataSegment key, DataSegment other)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
if (other == null)
{
throw new ArgumentNullException("other");
}
if (key.Length > ushort.MaxValue)
{
throw new ArgumentOutOfRangeException("key", key.Length,
string.Format(CultureInfo.InvariantCulture, "Cannot be longer than {0}", ushort.MaxValue));
}
if (other.Length > ushort.MaxValue)
{
throw new ArgumentOutOfRangeException("other", other.Length,
string.Format(CultureInfo.InvariantCulture, "Cannot be longer than {0}", ushort.MaxValue));
}
Algorithm = algorithm;
Inception = inception;
Expiration = expiration;
Mode = mode;
Error = error;
Key = key;
Other = other;
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < ConstantPartLength + DnsDomainName.RootLength)
{
return(null);
}
DnsDomainName algorithm;
int algorithmLength;
if (!DnsDomainName.TryParse(dns, offsetInDns, length - ConstantPartLength, out algorithm, out algorithmLength))
{
return(null);
}
offsetInDns += algorithmLength;
length -= algorithmLength;
if (length < ConstantPartLength)
{
return(null);
}
uint inception = dns.ReadUInt(offsetInDns + OffsetAfterAlgorithm.Inception, Endianity.Big);
uint expiration = dns.ReadUInt(offsetInDns + OffsetAfterAlgorithm.Expiration, Endianity.Big);
DnsTransactionKeyMode mode = (DnsTransactionKeyMode)dns.ReadUShort(offsetInDns + OffsetAfterAlgorithm.Mode, Endianity.Big);
DnsResponseCode error = (DnsResponseCode)dns.ReadUShort(offsetInDns + OffsetAfterAlgorithm.Error, Endianity.Big);
int keySize = dns.ReadUShort(offsetInDns + OffsetAfterAlgorithm.KeySize, Endianity.Big);
if (length < ConstantPartLength + keySize)
{
return(null);
}
DataSegment key = dns.Subsegment(offsetInDns + OffsetAfterAlgorithm.KeyData, keySize);
int totalReadAfterAlgorithm = OffsetAfterAlgorithm.KeyData + keySize;
offsetInDns += totalReadAfterAlgorithm;
length -= totalReadAfterAlgorithm;
int otherSize = dns.ReadUShort(offsetInDns, Endianity.Big);
if (length != sizeof(ushort) + otherSize)
{
return(null);
}
DataSegment other = dns.Subsegment(offsetInDns + sizeof(ushort), otherSize);
return(new DnsResourceDataTransactionKey(algorithm, inception, expiration, mode, error, key, other));
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
if (length < 17)
{
return((DnsResourceData)null);
}
DnsDomainName domainName;
int numBytesRead;
if (!DnsDomainName.TryParse(dns, offsetInDns, length - 16, out domainName, out numBytesRead))
{
return((DnsResourceData)null);
}
offsetInDns += numBytesRead;
length -= numBytesRead;
if (length < 16)
{
return((DnsResourceData)null);
}
uint num1 = dns.ReadUInt(offsetInDns, Endianity.Big);
uint num2 = dns.ReadUInt(offsetInDns + 4, Endianity.Big);
DnsTransactionKeyMode mode = (DnsTransactionKeyMode)dns.ReadUShort(offsetInDns + 8, Endianity.Big);
DnsResponseCode error = (DnsResponseCode)dns.ReadUShort(offsetInDns + 10, Endianity.Big);
int length1 = (int)dns.ReadUShort(offsetInDns + 12, Endianity.Big);
if (length < 16 + length1)
{
return((DnsResourceData)null);
}
DataSegment key = dns.Subsegment(offsetInDns + 14, length1);
int num3 = 14 + length1;
offsetInDns += num3;
length -= num3;
int length2 = (int)dns.ReadUShort(offsetInDns, Endianity.Big);
if (length != 2 + length2)
{
return((DnsResourceData)null);
}
DataSegment other = dns.Subsegment(offsetInDns + 2, length2);
return((DnsResourceData) new DnsResourceDataTransactionKey(domainName, (SerialNumber32)num1, (SerialNumber32)num2, mode, error, key, other));
}
public DnsResourceDataTransactionKey(DnsDomainName algorithm, SerialNumber32 inception, SerialNumber32 expiration, DnsTransactionKeyMode mode, DnsResponseCode error, DataSegment key, DataSegment other)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
if (other == null)
{
throw new ArgumentNullException("other");
}
if (key.Length > (int)ushort.MaxValue)
{
throw new ArgumentOutOfRangeException("key", (object)key.Length, string.Format((IFormatProvider)CultureInfo.InvariantCulture, "Cannot be longer than {0}", new object[1]
{
(object)ushort.MaxValue
}));
}
if (other.Length > (int)ushort.MaxValue)
{
throw new ArgumentOutOfRangeException("other", (object)other.Length, string.Format((IFormatProvider)CultureInfo.InvariantCulture, "Cannot be longer than {0}", new object[1]
{
(object)ushort.MaxValue
}));
}
this.Algorithm = algorithm;
this.Inception = inception;
this.Expiration = expiration;
this.Mode = mode;
this.Error = error;
this.Key = key;
this.Other = other;
}
