/// <summary>
/// Gets a certificate from an Azure key vault
/// Caches the certficate in memory for 2 hours
/// </summary>
/// <param name="certName"></param>
/// <returns>The certificate bundle or null if it does not exist</returns>
public static async Task <CertificateBundle> GetCertificateValueAsync(string certName)
{
try
{
var azureServiceTokenProvider = new AzureServiceTokenProvider();
var keyVaultClient = new KeyVaultClient(new KeyVaultClient.AuthenticationCallback(azureServiceTokenProvider.KeyVaultTokenCallback));
var key = $"CERT{certName}";
var cert = await CacheAsideHelper.GetOrAddAsync(async() => await keyVaultClient.GetCertificateAsync(VaultName, certName).ConfigureAwait(false), new TimeSpan(CacheHours, 0, 0), key);
return(cert);
}
catch (KeyVaultErrorException ex)
{
if (ex.Body.Error.Code == "CertificateNotFound")
{
return(null);
}
throw;
}
}
/// <summary>
/// Gets a secret from an Azure key vault
/// Caches the secret in memory for 2 hours
/// </summary>
/// <param name="secretName"></param>
/// <returns>The secret value or string.Empty if it does not exist</returns>
public static async Task <string> GetSecretValueAsync(string secretName)
{
try
{
var azureServiceTokenProvider = new AzureServiceTokenProvider();
var keyVaultClient = new KeyVaultClient(new KeyVaultClient.AuthenticationCallback(azureServiceTokenProvider.KeyVaultTokenCallback));
var key = $"SECRET{secretName}";
var secret = await CacheAsideHelper.GetOrAddAsync(async() => await keyVaultClient.GetSecretAsync(VaultName, secretName).ConfigureAwait(false), new TimeSpan(CacheHours, 0, 0), key);
return(secret?.Value ?? string.Empty);
}
catch (KeyVaultErrorException ex)
{
if (ex.Body.Error.Code == "SecretNotFound")
{
return(string.Empty); // secret does not exist - return blank
}
throw;
}
}