C#

Azure Key Vault Get the Latest Version of a Certificate

See more Azure Key Vault Examples

Demonstrates how to get the latest version of a certificate in Azure Key Vault.

Note: This example requires Chilkat v9.5.0.96 or later.

C#

bool success = false;

//  This requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

//  See Azure Key Vault Get Certificates for a more detailed explanation
//  for how Chilkat is automatically getting the OAuth2 access token for your application.

//  Provide information needed for Chilkat to automatically get an OAuth2 access token as needed.
Chilkat.JsonObject json = new Chilkat.JsonObject();
json.UpdateString("client_id","APP_ID");
json.UpdateString("client_secret","APP_PASSWORD");
json.UpdateString("resource","https://vault.azure.net");
json.UpdateString("token_endpoint","https://login.microsoftonline.com/TENANT_ID/oauth2/token");

Chilkat.Http http = new Chilkat.Http();

//  Instead of providing an actual access token, we give Chilkat the information that allows it to 
//  automatically fetch the access token using the OAuth2 client credentials flow.
http.AuthToken = json.Emit();

//  Replace VAULT_NAME with the name of your Azure Key Vault.
http.SetUrlVar("certName","importCert01");

Chilkat.StringBuilder sbResponse = new Chilkat.StringBuilder();
success = http.QuickGetSb("https://VAULT_NAME.vault.azure.net/certificates/{$certName}?api-version=7.4",sbResponse);
if (success == false) {

    int statusCode = http.LastStatus;
    if (statusCode == 0) {
        //  We did not get a response from the server..
        Debug.WriteLine(http.LastErrorText);
    }
    else {
        //  We received a response, but it was an error.
        Debug.WriteLine("Error response status code: " + Convert.ToString(statusCode));
        Debug.WriteLine("Error response:");
        Debug.WriteLine(sbResponse.GetAsString());
    }

    return;
}

Chilkat.JsonObject jsonResp = new Chilkat.JsonObject();
jsonResp.LoadSb(sbResponse);
jsonResp.EmitCompact = false;

Debug.WriteLine(jsonResp.Emit());

//  A sample JSON response is show at the bottom.

//  Let's do two things with the result.
//  1) Load the DER of the cert into a Chilkat Cert object.
//  2) Get the Key Vault version id of the certificate.

Chilkat.Cert cert = new Chilkat.Cert();
success = cert.LoadFromBase64(jsonResp.StringOf("cer"));
if (success == false) {
    Debug.WriteLine(cert.LastErrorText);
    Debug.WriteLine("Failed to load certificate from Base64 DER.");
    return;
}

//  The Azure Key Vault's "version" of the certificate is the hex string at the end of the "id", "kid", and "sid" JSON members.
//  For example:  "7140c8755ed14839b5d86a9f7e7f0497"
Chilkat.StringBuilder sbId = new Chilkat.StringBuilder();
sbId.Append(jsonResp.StringOf("id"));
string certVersion = sbId.GetAfterFinal("/",false);
Debug.WriteLine("The key vault cert version is " + certVersion);

//  {
//    "id": "https://kvchilkat.vault.azure.net/certificates/importCert01/7140c8755ed14839b5d86a9f7e7f0497",
//    "kid": "https://kvchilkat.vault.azure.net/keys/importCert01/7140c8755ed14839b5d86a9f7e7f0497",
//    "sid": "https://kvchilkat.vault.azure.net/secrets/importCert01/7140c8755ed14839b5d86a9f7e7f0497",
//    "x5t": "I_e3776K5Q_6PN1HHvJoI2ZGQRQ",
//    "cer": "MIIGXjCCB .... cjTsi7yIY=",
//    "attributes": {
//      "enabled": true,
//      "nbf": 1633996800,
//      "exp": 1728691199,
//      "created": 1697411128,
//      "updated": 1697411128,
//      "recoveryLevel": "CustomizedRecoverable+Purgeable",
//      "recoverableDays": 7
//    },
//    "policy": {
//      "id": "https://kvchilkat.vault.azure.net/certificates/importCert01/policy",
//      "key_props": {
//        "exportable": true,
//        "kty": "RSA",
//        "key_size": 4096,
//        "reuse_key": false
//      },
//      "secret_props": {
//        "contentType": "application/x-pkcs12"
//      },
//      "x509_props": {
//        "subject": "CN=\"Chilkat Software, Inc.\", O=\"Chilkat Software, Inc.\", S=Illinois, C=US",
//        "ekus": [
//          "1.3.6.1.5.5.7.3.3"
//        ],
//        "key_usage": [
//          "digitalSignature"
//        ],
//        "validity_months": 37,
//        "basic_constraints": {
//          "ca": false
//        }
//      },
//      "lifetime_actions": [
//        {
//          "trigger": {
//            "lifetime_percentage": 80
//          },
//          "action": {
//            "action_type": "EmailContacts"
//          }
//        }
//      ],
//      "issuer": {
//        "name": "Unknown"
//      },
//      "attributes": {
//        "enabled": true,
//        "created": 1697411128,
//        "updated": 1697411128
//      }
//    }
//  }