(C++) Get Certificate User Principal Name (UPN)

See more Certificates Examples

Note: This example requires Chilkat v9.5.0.90 or greater due to fixes made in getting the UPN from the SAN.

Chilkat C/C++ Library Downloads
MS Visual C/C++ C++ Builder Linux C/C++ Alpine Linux C/C++	MacOS C/C++ iOS C/C++ Android C/C++ MinGW C/C++

#include <CkCert.h>
#include <CkXml.h>

void ChilkatSample(void)
    {
    CkCert cert;

    bool success = cert.LoadFromFile("qa_data/certs/sample.cer");
    if (success == false) {
        std::cout << cert.lastErrorText() << "\r\n";
        return;
    }

    CkXml xml;
    xml.LoadXml(cert.subjectAlternativeName());
    std::cout << xml.getXml() << "\r\n";

    // A certificate with a User Principal Name in the SAN might have this:

    // <SubjectAltName>
    //     <rfc822Name>joe@example.com</rfc822Name>
    //     <name type="oid" oid="1.3.6.1.4.1.311.20.2.3">joe@example.com</name>
    // </SubjectAltName>

    // The OID 1.3.6.1.4.1.311.20.2.3 is for the User Principal Name.
    const char *upn = xml.chilkatPath("/A/name,oid,1.3.6.1.4.1.311.20.2.3|*");
    if (xml.get_LastMethodSuccess() == false) {
        std::cout << "No user principle name." << "\r\n";
    }
    else {
        std::cout << "User Principle Name = " << upn << "\r\n";
    }
    }