I have an application set up with Azure ACS and .net 4.5 using claims. My application uses dropbox also. I was wondering if i could let users identify them self with dropbox alone.
I get a token from dropbox when the user logs in with dropbox and a unique id. Where in the .net pipe do i tell it that i have authenticated a user, such the principals are set on the next request also.
To make the example simple, lets say i have a form with two inputs. name,pass. If the name is 1234 and pass is 1234. then i would like to tell the asp.net pipeline that the user is authenticated. Is this possible? or do i need to create custom token handlers an such to integrate it into WIF?
Update
I found this: I would like comments on the solution, if there are security concerns i should be aware off.
var sam = FederatedAuthentication.SessionAuthenticationModule;
if (sam != null)
{
var cp = new ClaimsPrincipal(new ClaimsIdentity(new List<Claim> {new Claim("Provider","Dropbox")}, "OAuth"));
var transformer = FederatedAuthentication.FederationConfiguration.IdentityConfiguration.ClaimsAuthenticationManager;
if (transformer != null)
{
cp = transformer.Authenticate(String.Empty, cp);
}
var token = new SessionSecurityToken(cp);
sam.WriteSessionTokenToCookie(token);
}
All code:
public HttpResponseMessage get_reply_from_dropbox(string reply_from)
{
var response = this.Request.CreateResponse(HttpStatusCode.Redirect);
var q = this.Request.GetQueryNameValuePairs();
var uid = q.FirstOrDefault(k => k.Key == "uid");
if (!string.IsNullOrEmpty(uid.Value))
{
var sam = FederatedAuthentication.SessionAuthenticationModule;
if (sam != null)
{
var cp = new ClaimsPrincipal(new ClaimsIdentity(new List<Claim> {new Claim("Provider","Dropbox")}, "OAuth"));
var transformer = FederatedAuthentication.FederationConfiguration.IdentityConfiguration.ClaimsAuthenticationManager;
if (transformer != null)
{
cp = transformer.Authenticate(String.Empty, cp);
}
var token = new SessionSecurityToken(cp);
sam.WriteSessionTokenToCookie(token);
}
}
response.Headers.Location = new Uri(reply_from);
return response;
}
public async Task<string> get_request_token_url(string reply_to)
{
var client = new HttpClient();
client.DefaultRequestHeaders.Authorization =
new AuthenticationHeaderValue("OAuth",
string.Format("oauth_version=\"1.0\", oauth_signature_method=\"PLAINTEXT\", oauth_consumer_key=\"{0}\", oauth_signature=\"{1}&\"",
"<dropboxkey>","<dropboxsecret>"));
var data = await client.GetStringAsync("https://api.dropbox.com/1/oauth/request_token");
var pars = data.Split('&').ToDictionary(k=>k.Substring(0,k.IndexOf('=')),v=>v.Substring(v.IndexOf('=')+1));
return "https://www.dropbox.com/1/oauth/authorize?oauth_token=" + pars["oauth_token"]
+ "&oauth_callback=<MYSITE>/api/dropbox/get_reply_from_dropbox?reply_from=" + reply_to;
}
It works by the user request the authentication url, when the user authenticates my app it returns to get_reply_from_dropbox and logs in the user.
I offcause needs to handle some other stuff also, like what if the request do not come from dropbox.