(Delphi DLL) 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.

For more information, see https://learn.microsoft.com/en-us/rest/api/keyvault/certificates/get-certificate/get-certificate?tabs=HTTP

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, StringBuilder, Cert, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
json: HCkJsonObject;
http: HCkHttp;
sbResponse: HCkStringBuilder;
statusCode: Integer;
jsonResp: HCkJsonObject;
cert: HCkCert;
sbId: HCkStringBuilder;
certVersion: PWideChar;

begin
// 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.
json := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'client_id','APP_ID');
CkJsonObject_UpdateString(json,'client_secret','APP_PASSWORD');
CkJsonObject_UpdateString(json,'resource','https://vault.azure.net');
CkJsonObject_UpdateString(json,'token_endpoint','https://login.microsoftonline.com/TENANT_ID/oauth2/token');

http := CkHttp_Create();

// 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.
CkHttp_putAuthToken(http,CkJsonObject__emit(json));

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

sbResponse := CkStringBuilder_Create();
success := CkHttp_QuickGetSb(http,'https://VAULT_NAME.vault.azure.net/certificates/{$certName}?api-version=7.4',sbResponse);
if (success = False) then
  begin

    statusCode := CkHttp_getLastStatus(http);
    if (statusCode = 0) then
      begin
        // We did not get a response from the server..
        Memo1.Lines.Add(CkHttp__lastErrorText(http));
      end
    else
      begin
        // We received a response, but it was an error.
        Memo1.Lines.Add('Error response status code: ' + IntToStr(statusCode));
        Memo1.Lines.Add('Error response:');
        Memo1.Lines.Add(CkStringBuilder__getAsString(sbResponse));
      end;
    Exit;
  end;

jsonResp := CkJsonObject_Create();
CkJsonObject_LoadSb(jsonResp,sbResponse);
CkJsonObject_putEmitCompact(jsonResp,False);

Memo1.Lines.Add(CkJsonObject__emit(jsonResp));

// 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.

cert := CkCert_Create();
success := CkCert_LoadFromBase64(cert,CkJsonObject__stringOf(jsonResp,'cer'));
if (success = False) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(cert));
    Memo1.Lines.Add('Failed to load certificate from Base64 DER.');
    Exit;
  end;

// 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"
sbId := CkStringBuilder_Create();
CkStringBuilder_Append(sbId,CkJsonObject__stringOf(jsonResp,'id'));
certVersion := CkStringBuilder__getAfterFinal(sbId,'/',False);
Memo1.Lines.Add('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
//     }
//   }
// }

CkJsonObject_Dispose(json);
CkHttp_Dispose(http);
CkStringBuilder_Dispose(sbResponse);
CkJsonObject_Dispose(jsonResp);
CkCert_Dispose(cert);
CkStringBuilder_Dispose(sbId);

end;