Create a Computer Request Including IP address Subject Alternative Name
c#, certenroll, self-signed
Solution
InitializeFromString does not accept an AlternativeNameType of XCN_CERT_ALT_NAME_IP_ADDRESS**. You have to use InitializeFromRawData instead. The error is something of a misnomer because it's not actually the value parameter that's the issue, it's the type, but hey.
InitializeFromRawData takes a string as input (because this is Microsoft, not Ronseal), so you need to encode your raw data as a string so it can turn it in to raw data again:
String ipBase64 = Convert.ToBase64String(ip.GetAddressBytes());
nameClass.InitializeFromRawData(AlternativeNameType.XCN_CERT_ALT_NAME_IP_ADDRESS, EncodingType.XCN_CRYPT_STRING_BASE64, ipBase64);
About as intuitive as an Escher artpiece.
** Source: http://msdn.microsoft.com/en-us/library/windows/desktop/aa375024%28v=vs.85%29.aspx
Problem
I'm trying to create a request with IP address SAN. This is the function that is responsible for creating the CAlternativeName: ``` public static CAlternativeNameClass GetCurrentIpName() { //get current machine IP address IPAddress ip = GetCurrentIp(); if (ip == null) { return null; } try { CAlternativeNameClass nameClass = new CAlternativeNameClass(); nameClass.InitializeFromString(AlternativeNameType.XCN_CERT_ALT_NAME_IP_ADDRESS, ip.ToString()); return nameClass; } catch (Exception e) { Console.WriteLine(e); return null; } } ``` The problem is that I'm getting the next error: ``` System.ArgumentException: Value does not fall within the expected range. at CERTENROLLLib.CAlternativeNameClass.InitializeFromString(AlternativeNameType Type, String strValue) ``` What am I doing wrong?