/// <summary>
/// Tries to write -> read -> clear a secret from the underlying persistence mechanism
/// </summary>
public void VerifyPersistence()
{
// do not use the _cacheAccessor for writing dummy data, as it might overwrite an actual token cache
var persitenceValidatationAccessor = CacheAccessor.CreateForPersistenceValidation();
try
{
_logger.LogInformation($"[Verify Persistence] Writing Data ");
persitenceValidatationAccessor.Write(Encoding.UTF8.GetBytes(PersistenceValidationDummyData));
_logger.LogInformation($"[Verify Persistence] Reading Data ");
var data = persitenceValidatationAccessor.Read();
if (data == null || data.Length == 0)
{
throw new MsalCachePersistenceException(
"Persistence check failed. Data was written but it could not be read. " +
"Possible cause: on Linux, LibSecret is installed but D-Bus isn't running because it cannot be started over SSH.");
}
string dataRead = Encoding.UTF8.GetString(data);
if (!string.Equals(PersistenceValidationDummyData, dataRead, StringComparison.Ordinal))
{
throw new MsalCachePersistenceException(
$"Persistence check failed. Data written {PersistenceValidationDummyData} is different from data read {dataRead}");
}
}
catch (InteropException e)
{
throw new MsalCachePersistenceException(
$"Persistence check failed. Reason: {e.Message}. OS error code {e.ErrorCode}.", e);
}
catch (Exception ex) when(!(ex is MsalCachePersistenceException))
{
throw new MsalCachePersistenceException("Persistence check failed. Inspect inner exception for details", ex);
}
finally
{
try
{
_logger.LogInformation($"[Verify Persistence] Clearing data");
persitenceValidatationAccessor.Clear();
}
catch (Exception e)
{
_logger.LogError($"[Verify Persistence] Could not clear the test data: " + e);
}
}
}