(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

Chilkat C/C++ Library Downloads
MS Visual C/C++ Linux/CentOS C/C++ Alpine Linux C/C++ MAC OS X C/C++	armhf/aarch64 C/C++ C++ Builder iOS C/C++ Android C/C++	Solaris C/C++ MinGW C/C++

#include <C_CkJsonObject.h>
#include <C_CkHttp.h>
#include <C_CkStringBuilder.h>
#include <C_CkCert.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJsonObject json;
    HCkHttp http;
    HCkStringBuilder sbResponse;
    int statusCode;
    HCkJsonObject jsonResp;
    HCkCert cert;
    HCkStringBuilder sbId;
    const char *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 = 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) {

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

        CkJsonObject_Dispose(json);
        CkHttp_Dispose(http);
        CkStringBuilder_Dispose(sbResponse);
        return;
    }

    jsonResp = CkJsonObject_Create();
    CkJsonObject_LoadSb(jsonResp,sbResponse);
    CkJsonObject_putEmitCompact(jsonResp,FALSE);

    printf("%s\n",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) {
        printf("%s\n",CkCert_lastErrorText(cert));
        printf("Failed to load certificate from Base64 DER.\n");
        CkJsonObject_Dispose(json);
        CkHttp_Dispose(http);
        CkStringBuilder_Dispose(sbResponse);
        CkJsonObject_Dispose(jsonResp);
        CkCert_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 = CkStringBuilder_Create();
    CkStringBuilder_Append(sbId,CkJsonObject_stringOf(jsonResp,"id"));
    certVersion = CkStringBuilder_getAfterFinal(sbId,"/",FALSE);
    printf("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
    //     }
    //   }
    // }


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

    }