protected override async Task <AuthenticationTicket> AuthenticateCoreAsync()
{
AuthenticationProperties properties = null;
try
{
string code = null;
string csrf_state = null;
//obtaining the shortened state value from the cookie
HttpCookie csrfStateCookie = HttpContext.Current.Request.Cookies["csrf_state"];
string originalStateString = csrfStateCookie.Value;
IReadableStringCollection query = Request.Query;
IList <string> values = query.GetValues("code");
if (values != null && values.Count == 1)
{
code = values[0];
}
values = query.GetValues("state");
if (values != null && values.Count == 1)
{
csrf_state = values[0];
}
//verify sent and recieved state parameters for CSRF
if (csrf_state != originalStateString)
{
return(null);
}
//Obtain the original state value from cookie
HttpCookie stateCookie = HttpContext.Current.Request.Cookies["state"];
string state = stateCookie.Value;
properties = Options.StateDataFormat.Unprotect(state);
if (properties == null)
{
return(null);
}
if (!ValidateCorrelationId(properties, _logger))
{
return(new AuthenticationTicket(null, properties));
}
string requestPrefix = Request.Scheme + "://" + Request.Host;
string redirectUri = requestPrefix + Request.PathBase + Options.CallbackPath;
string tokenRequest = "grant_type=authorization_code" +
"&code=" + Uri.EscapeDataString(code) +
"&redirect_uri=" + Uri.EscapeDataString(redirectUri) +
"&client_id=" + Uri.EscapeDataString(Options.AppKey) +
"&client_secret=" + Uri.EscapeDataString(Options.AppSecret);
HttpRequestMessage request = new HttpRequestMessage();
HttpResponseMessage tokenResponse = await _httpClient.PostAsync(TokenEndpoint + "?" + tokenRequest, request.Content, Request.CallCancelled);
tokenResponse.EnsureSuccessStatusCode();
string text = await tokenResponse.Content.ReadAsStringAsync();
JObject tokenResult = JObject.Parse(text);
JToken access_token = tokenResult["access_token"] as JToken;
string accessToken = access_token.ToString();
//set expiration time of the access token to 2 months
string expires = "5183999";
HttpResponseMessage response = await _httpClient.GetAsync(
ApiEndpoint + "?access_token=" + Uri.EscapeDataString(accessToken), Request.CallCancelled);
response.EnsureSuccessStatusCode();
text = await response.Content.ReadAsStringAsync();
JObject user = JObject.Parse(text);
var context = new DropboxAuthenticatedContext(Context, user, accessToken, expires);
context.Identity = new ClaimsIdentity(
Options.AuthenticationType,
ClaimsIdentity.DefaultNameClaimType,
ClaimsIdentity.DefaultRoleClaimType);
if (!string.IsNullOrEmpty(context.UId))
{
context.Identity.AddClaim(new Claim(ClaimTypes.NameIdentifier, context.UId, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.DisplayName))
{
context.Identity.AddClaim(new Claim(ClaimsIdentity.DefaultNameClaimType, context.DisplayName, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.Email))
{
context.Identity.AddClaim(new Claim(ClaimTypes.Email, context.Email, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.Country))
{
context.Identity.AddClaim(new Claim(ClaimTypes.Country, context.Country, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.ReferralLink))
{
context.Identity.AddClaim(new Claim("urn:dropbox:referral_link", context.ReferralLink, XmlSchemaString, Options.AuthenticationType));
}
context.Properties = properties;
await Options.Provider.Authenticated(context);
return(new AuthenticationTicket(context.Identity, context.Properties));
}
catch (Exception ex)
{
_logger.WriteError(ex.Message);
}
return(new AuthenticationTicket(null, properties));
}
public virtual Task Authenticated(DropboxAuthenticatedContext context)
{
return(OnAuthenticated(context));
}
public virtual Task Authenticated(DropboxAuthenticatedContext context)
{
return OnAuthenticated(context);
}
