undefined reference to `DeviceAuth_GetCertificatePath' in 20.10

Question

Az Sphere 20.10

Linking is giving undefined reference to `DeviceAuth_GetCertificatePath'

C:/Program Files (x86)/Microsoft Azure Sphere SDK/Sysroots/7/tools/gcc/real-ld.exe: CMakeFiles/PrivateNetworkServices.dir/main.c.obj: in function main': C:\Users\trt-dev6\azSphere\azure-sphere-samples-master\azure-sphere-samples-master\Samples\PrivateNetworkServices\out\ARM-Debug/../../main.c:448: undefined reference to DeviceAuth_GetCertificatePath'

Can anyone help resolve that please?

Answer 1

OK so it seems that to use DeviceAuth_GetCertificatePath

that you must add tlsutils to the list of libraries in cMakeLists.txt

So I guess failing to mention that is a deficiency of the azsphere documentation,

Answer 2

#define SSL_FILETYPE_PEM 1

 if (Application_IsDeviceAuthReady(&authReady) == 0) {
            if (authReady) {
                const char *certPath = DeviceAuth_GetCertificatePath();

                WOLFSSL_X509 *x509;
                x509 = wolfSSL_X509_load_certificate_file(certPath, SSL_FILETYPE_PEM);


                /* ------ EXTRACT CERTIFICATE ELEMENTS ------ */


                /* extract subjectName  */
                name = wolfSSL_X509_get_subject_name(x509);
                if (name == NULL)
                    Log_Debug("wolfSSL_X509_get_subject_name failed");
                else
                    Log_Debug("subject name:%s\n\r", wolfSSL_X509_NAME_oneline(name, subjectName, 80));

                /* extract issuerName  */
                name = wolfSSL_X509_get_issuer_name(x509);
                if (name == NULL)
                    Log_Debug("wolfSSL_X509_get_issuer_name failed");
                else
                    Log_Debug("issuer name:%s\n\r", wolfSSL_X509_NAME_oneline(name, issuerName, 80));

                // see https://www.wolfssl.com/forums/topic958-using-notbefore-notafter.html

                char *b = wolfSSL_X509_notBefore(x509);
                Log_Debug("not before:%s\n\r", &b[2]);
                char *a = wolfSSL_X509_notAfter(x509);
                Log_Debug("not after:%s\n\r", &a[2]);

                wolfSSL_X509_free(x509);
            }
        }

prints out (tenant ID changed)

subject name:

issuer name:/C=US/ST=Washington/L=Redmond/O=Microsoft Corporation/CN=tenanit-id-id-id

not before:201119111252Z

not after:201120121252Z