private DnsResourceDataNextDomainSecure3(DnsSecNSec3HashAlgorithm hashAlgorithm, DnsSecNSec3Flags flags, ushort iterations, DataSegment salt,
DataSegment nextHashedOwnerName, DnsTypeBitmaps typeBitmaps)
: base(hashAlgorithm, flags, iterations, salt)
{
if (nextHashedOwnerName.Length > byte.MaxValue)
{
throw new ArgumentOutOfRangeException("nextHashedOwnerName", nextHashedOwnerName.Length,
string.Format(CultureInfo.InvariantCulture, "Cannot bigger than {0}.", byte.MaxValue));
}
NextHashedOwnerName = nextHashedOwnerName;
_typeBitmaps = typeBitmaps;
}
internal override DnsResourceData CreateInstance(DnsDatagram dns, int offsetInDns, int length)
{
DnsDomainName nextDomainName;
int nextDomainNameLength;
if (!DnsDomainName.TryParse(dns, offsetInDns, length, out nextDomainName, out nextDomainNameLength))
{
return(null);
}
offsetInDns += nextDomainNameLength;
length -= nextDomainNameLength;
DnsTypeBitmaps typeBitmaps = DnsTypeBitmaps.CreateInstance(dns.Buffer, dns.StartOffset + offsetInDns, length);
if (typeBitmaps == null)
{
return(null);
}
return(new DnsResourceDataNextDomainSecure(nextDomainName, typeBitmaps));
}
internal override DnsResourceData CreateInstance(DataSegment data)
{
DnsSecNSec3HashAlgorithm hashAlgorithm;
DnsSecNSec3Flags flags;
ushort iterations;
DataSegment salt;
if (!TryReadParameters(data, out hashAlgorithm, out flags, out iterations, out salt))
{
return(null);
}
int nextHashedOwnerNameLengthOffset = GetParametersLength(salt.Length);
if (data.Length - nextHashedOwnerNameLengthOffset < sizeof(byte))
{
return(null);
}
int nextHashedOwnerNameOffset = nextHashedOwnerNameLengthOffset + sizeof(byte);
int nextHashedOwnerNameLength = data[nextHashedOwnerNameLengthOffset];
if (data.Length - nextHashedOwnerNameOffset < nextHashedOwnerNameLength)
{
return(null);
}
DataSegment nextHashedOwnerName = data.Subsegment(nextHashedOwnerNameOffset, nextHashedOwnerNameLength);
int typeBitmapsOffset = nextHashedOwnerNameOffset + nextHashedOwnerNameLength;
DnsTypeBitmaps typeBitmaps = DnsTypeBitmaps.CreateInstance(data.Buffer, data.StartOffset + typeBitmapsOffset, data.Length - typeBitmapsOffset);
if (typeBitmaps == null)
{
return(null);
}
return(new DnsResourceDataNextDomainSecure3(hashAlgorithm, flags, iterations, salt, nextHashedOwnerName, typeBitmaps));
}
private DnsResourceDataNextDomainSecure(DnsDomainName nextDomainName, DnsTypeBitmaps typeBitmaps)
{
NextDomainName = nextDomainName;
_typeBitmaps = typeBitmaps;
}