(C# UWP/WinRT) Subject Alternative Name

Demonstrates the usage of the SubjectAlternativeName property to get the certificate SAN (subject alternative name) as XML.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

// Note: Not all certificates contain a Subject Alternative Name.
// If it does not, the SubjectAlternativeName property will contain the empty string.

Chilkat.Cert cert = new Chilkat.Cert();

bool success = cert.LoadFromFile("qa_data/certs/testIcpBrasil.cer");
if (success == false) {
    Debug.WriteLine(cert.LastErrorText);
    return;
}

string subjectAltNameXml = cert.SubjectAlternativeName;

Debug.WriteLine(subjectAltNameXml);

// Here's a sample of the subjectAltNameXml:

// <?xml version="1.0" encoding="utf-8"?>
// <SubjectAltName>
//     <name type="oid" oid="2.16.76.1.3.4">...</name>
//     <name type="oid" oid="2.16.76.1.3.2">...</name>
//     <name type="oid" oid="2.16.76.1.3.3">...</name>
//     <name type="oid" oid="2.16.76.1.3.7">...</name>
//     <rfc822Name>...</rfc822Name>
// </SubjectAltName>

// The XML can be parsed like this:

Chilkat.Xml xml = new Chilkat.Xml();

xml.LoadXml(subjectAltNameXml);

string oid;
string name;

int i = 0;
int count_i = xml.NumChildrenHavingTag("name");
while (i < count_i) {
    xml.I = i;
    oid = xml.ChilkatPath("name[i]|(oid)");
    name = xml.GetChildContent("name[i]");
    i = i + 1;
}

string rfc822Name = xml.GetChildContent("rfc822Name");