public static string GetDefaultCacheFilename(string apiUrl)
{
var home = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData, Environment.SpecialFolderOption.Create);
var hash = SHA256.Create().ComputeHash(Encoding.UTF8.GetBytes(apiUrl));
var file = JsonWebSigner.Base64UrlEncoded(hash) + ".lets-encrypt.cache.json";
return(Path.Combine(home, file));
}
public async Task Init(string email, CancellationToken token = default(CancellationToken))
{
_accountKey = new RSACryptoServiceProvider(4096);
// retrieve the API directory
(_directory, _) = await SendAsync <APIDirectory>(HttpMethod.Get, new Uri("directory", UriKind.Relative), null, token);
// check for account
if (File.Exists(_cachePath))
{
bool success;
try
{
RegistrationCache.SetInstance(RegistrationCache.LoadCacheFromFile(_cachePath));
_accountKey.ImportCspBlob(RegistrationCache.Instance.AccountKey);
_encryptor = new JsonWebSigner(_accountKey, RegistrationCache.Instance.Location.ToString());
success = true;
}
catch
{
success = false;
}
if (success)
{
return;
}
}
// no account found, create a new account
_encryptor = new JsonWebSigner(_accountKey, null);
var(account, response) = await SendAsync <Account>(HttpMethod.Post, _directory.NewAccount, new Account
{
// we validate this in the UI before we get here, so that is fine
TermsOfServiceAgreed = true,
Contacts = new[] { "mailto:" + email },
}, token);
_encryptor.SetKeyId(account);
if (account.Status != "valid")
{
throw new InvalidOperationException("Account status is not valid, was: " + account.Status + Environment.NewLine + response);
}
RegistrationCache.SetInstance(new RegistrationCache
{
Location = account.Location,
AccountKey = _accountKey.ExportCspBlob(true),
Id = account.Id,
Key = account.Key
});
RegistrationCache.SaveInstance(_cachePath);
}
