public async Task RetrieveCertificateAsync()
{
#region RetrieveCertificate
CertificateWithPolicy certificateWithPolicy = await client.GetCertificateWithPolicyAsync("MyCertificate");
#endregion
#region GetCertificate
Certificate certificate = await client.GetCertificateAsync(certificateWithPolicy.Name, certificateWithPolicy.Properties.Version);
#endregion
}
public async Task HelloWorldAsync()
{
// Environment variable with the Key Vault endpoint.
string keyVaultUrl = Environment.GetEnvironmentVariable("AZURE_KEYVAULT_URL");
// Instantiate a certificate client that will be used to call the service. Notice that the client is using
// default Azure credentials. To make default credentials work, ensure that environment variables 'AZURE_CLIENT_ID',
// 'AZURE_CLIENT_KEY' and 'AZURE_TENANT_ID' are set with the service principal credentials.
var client = new CertificateClient(new Uri(keyVaultUrl), new DefaultAzureCredential());
// Let's create a self signed certifiate using the default policy. If the certificiate
// already exists in the Key Vault, then a new version of the key is created.
string certName = $"defaultCert-{Guid.NewGuid()}";
CertificateOperation certOp = await client.StartCreateCertificateAsync(certName);
// Next let's wait on the certificate operation to complete. Note that certificate creation can last an indeterministic
// amount of time, so applications should only wait on the operation to complete in the case the issuance time is well
// known and within the scope of the application lifetime. In this case we are creating a self-signed certificate which
// should be issued in a relatively short amount of time.
CertificateWithPolicy certificate = await certOp.WaitCompletionAsync();
// At some time later we could get the created certificate along with it's policy from the Key Vault.
certificate = await client.GetCertificateWithPolicyAsync(certName);
Debug.WriteLine($"Certificate was returned with name {certificate.Name} which expires {certificate.Properties.Expires}");
// We find that the certificate has been compromised and we want to disable it so applications will no longer be able
// to access the compromised version of the certificate.
CertificateProperties certificateProperties = certificate.Properties;
certificateProperties.Enabled = false;
Certificate updatedCert = await client.UpdateCertificatePropertiesAsync(certificateProperties);
Debug.WriteLine($"Certificate enabled set to '{updatedCert.Properties.Enabled}'");
// We need to create a new version of the certificate that applications can use to replace the compromised certificate.
// Creating a certificate with the same name and policy as the compromised certificate will create another version of the
// certificate with similar properties to the original certificate
CertificateOperation newCertOp = await client.StartCreateCertificateAsync(certificate.Name, certificate.Policy);
CertificateWithPolicy newCert = await newCertOp.WaitCompletionAsync();
// The certificate is no longer needed, need to delete it from the Key Vault.
await client.DeleteCertificateAsync(certName);
// To ensure key is deleted on server side.
Assert.IsTrue(await WaitForDeletedKeyAsync(client, certName));
// If the keyvault is soft-delete enabled, then for permanent deletion, deleted key needs to be purged.
await client.PurgeDeletedCertificateAsync(certName);
}
