protected MobileServicePKCEAuthentication(MobileServiceClient client, string provider, string uriScheme, IDictionary <string, string> parameters)
: base(client, provider, parameters)
{
if (client == null)
{
throw new ArgumentNullException("client");
}
if (string.IsNullOrWhiteSpace(uriScheme))
{
throw new ArgumentException("uriScheme");
}
this.client = client;
this.CodeVerifier = GetCodeVerifier();
this.CallbackUri = new Uri(MobileServiceUrlBuilder.CombileSchemeAndPath(uriScheme, "easyauth.callback"));
var path = MobileServiceUrlBuilder.CombinePaths(LoginAsyncUriFragment, this.ProviderName);
if (!string.IsNullOrEmpty(this.Client.LoginUriPrefix))
{
path = MobileServiceUrlBuilder.CombinePaths(this.Client.LoginUriPrefix, this.ProviderName);
}
var loginParameters = parameters != null ? new Dictionary <string, string>(parameters) : new Dictionary <string, string>();
loginParameters.Add("post_login_redirect_url", this.CallbackUri.AbsoluteUri);
loginParameters.Add("code_challenge", GetSha256Hash(this.CodeVerifier));
loginParameters.Add("code_challenge_method", "S256");
loginParameters.Add("session_mode", "token");
var loginQueryString = MobileServiceUrlBuilder.GetQueryString(loginParameters, false);
var loginPathAndQuery = MobileServiceUrlBuilder.CombinePathAndQuery(path, loginQueryString);
this.LoginUri = new Uri(this.Client.MobileAppUri, loginPathAndQuery);
if (this.Client.AlternateLoginHost != null)
{
this.LoginUri = new Uri(this.Client.AlternateLoginHost, loginPathAndQuery);
}
}