(Unicode 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.

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

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#include <C_CkJsonObjectW.h>
#include <C_CkHttpW.h>
#include <C_CkStringBuilderW.h>
#include <C_CkCertW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJsonObjectW json;
    HCkHttpW http;
    HCkStringBuilderW sbResponse;
    int statusCode;
    HCkJsonObjectW jsonResp;
    HCkCertW cert;
    HCkStringBuilderW sbId;
    const wchar_t *certVersion;

    // 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 = CkJsonObjectW_Create();
    CkJsonObjectW_UpdateString(json,L"client_id",L"APP_ID");
    CkJsonObjectW_UpdateString(json,L"client_secret",L"APP_PASSWORD");
    CkJsonObjectW_UpdateString(json,L"resource",L"https://vault.azure.net");
    CkJsonObjectW_UpdateString(json,L"token_endpoint",L"https://login.microsoftonline.com/TENANT_ID/oauth2/token");

    http = CkHttpW_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.
    CkHttpW_putAuthToken(http,CkJsonObjectW_emit(json));

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

    sbResponse = CkStringBuilderW_Create();
    success = CkHttpW_QuickGetSb(http,L"https://VAULT_NAME.vault.azure.net/certificates/{$certName}?api-version=7.4",sbResponse);
    if (success == FALSE) {

        statusCode = CkHttpW_getLastStatus(http);
        if (statusCode == 0) {
            // We did not get a response from the server..
            wprintf(L"%s\n",CkHttpW_lastErrorText(http));
        }
        else {
            // We received a response, but it was an error.
            wprintf(L"Error response status code: %d\n",statusCode);
            wprintf(L"Error response:\n");
            wprintf(L"%s\n",CkStringBuilderW_getAsString(sbResponse));
        }

        CkJsonObjectW_Dispose(json);
        CkHttpW_Dispose(http);
        CkStringBuilderW_Dispose(sbResponse);
        return;
    }

    jsonResp = CkJsonObjectW_Create();
    CkJsonObjectW_LoadSb(jsonResp,sbResponse);
    CkJsonObjectW_putEmitCompact(jsonResp,FALSE);

    wprintf(L"%s\n",CkJsonObjectW_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 = CkCertW_Create();
    success = CkCertW_LoadFromBase64(cert,CkJsonObjectW_stringOf(jsonResp,L"cer"));
    if (success == FALSE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert));
        wprintf(L"Failed to load certificate from Base64 DER.\n");
        CkJsonObjectW_Dispose(json);
        CkHttpW_Dispose(http);
        CkStringBuilderW_Dispose(sbResponse);
        CkJsonObjectW_Dispose(jsonResp);
        CkCertW_Dispose(cert);
        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"
    sbId = CkStringBuilderW_Create();
    CkStringBuilderW_Append(sbId,CkJsonObjectW_stringOf(jsonResp,L"id"));
    certVersion = CkStringBuilderW_getAfterFinal(sbId,L"/",FALSE);
    wprintf(L"The key vault cert version is %s\n",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
    //     }
    //   }
    // }


    CkJsonObjectW_Dispose(json);
    CkHttpW_Dispose(http);
    CkStringBuilderW_Dispose(sbResponse);
    CkJsonObjectW_Dispose(jsonResp);
    CkCertW_Dispose(cert);
    CkStringBuilderW_Dispose(sbId);

    }