.NET Core C#

Subject Alternative Name for ICP Brasil Certs

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Demonstrates how to access the multiple names contained in the Subject Alternative Name of a certificate. This example is for an ICP Brasil certificate. .NET Core C#

bool success = false;

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

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

// If the cert's Subject Alternative Name contains multiple values, each specified by an OID,
// then the Rfc822Name property returns XML.
string subjectAltNameXml = cert.Rfc822Name;

Debug.WriteLine(subjectAltNameXml);

// Here's a sample of the subjectAltNameXml:

// <SubjectAltName>
//     <name type="oid" oid="2.16.76.1.3.4">290999653223955019700000000000000000000150424SRJUXPTS</name>
//     <name type="oid" oid="2.16.76.1.3.2">JOAO SILVA</name>
//     <name type="oid" oid="2.16.76.1.3.3">02408939000115</name>
//     <name type="oid" oid="2.16.76.1.3.7">000000000000</name>
// </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]");
    Debug.WriteLine(oid + ": " + name);
    i = i + 1;
}