protected override async Task <AuthenticationTicket> AuthenticateCoreAsync()
{
AuthenticationProperties properties = null;
try
{
string code = null;
string state = null;
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)
{
state = values[0];
}
properties = Options.StateDataFormat.Unprotect(state);
if (properties == null)
{
return(null);
}
// OAuth2 10.12 CSRF
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.ClientId) +
"&client_secret=" + Uri.EscapeDataString(Options.ClientSecret);
//Set accept header to request details as a JSON Object
_httpClient.DefaultRequestHeaders.Add("accept", "application/json");
HttpResponseMessage tokenResponse = await _httpClient.GetAsync(TokenEndpoint + "?" + tokenRequest, Request.CallCancelled);
tokenResponse.EnsureSuccessStatusCode();
string text = await tokenResponse.Content.ReadAsStringAsync();
//Parsing the string to a JSON Object
JObject jsonText = JObject.Parse(text);
//Extracting the access token from the JSON Object
JToken accessToken;
jsonText.TryGetValue("access_token", out accessToken);
//Set the expiration time 60 days (5183999 seconds)
string expires = "5183999";
//As Github required to include a User Agent in all requests, set User Agent in the request header
_httpClient.DefaultRequestHeaders.Add("user-agent", "OwinContrib Security Github");
HttpResponseMessage API_Response = await _httpClient.GetAsync(
ApiEndpoint + Uri.EscapeDataString(accessToken.ToString()), Request.CallCancelled);
API_Response.EnsureSuccessStatusCode();
text = await API_Response.Content.ReadAsStringAsync();
JObject user = JObject.Parse(text);
var context = new GithubAuthenticatedContext(Context, user, accessToken.ToString(), expires);
context.Identity = new ClaimsIdentity(
Options.AuthenticationType,
ClaimsIdentity.DefaultNameClaimType,
ClaimsIdentity.DefaultRoleClaimType);
//Add context properties to the Claims Identity
if (!string.IsNullOrEmpty(context.Id))
{
context.Identity.AddClaim(new Claim(ClaimTypes.NameIdentifier, context.Id, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.Email))
{
context.Identity.AddClaim(new Claim(ClaimTypes.Email, context.Email, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.UserName))
{
context.Identity.AddClaim(new Claim(ClaimTypes.Name, context.UserName, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.Url))
{
context.Identity.AddClaim(new Claim("urn:github:link", context.Url, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.Login))
{
context.Identity.AddClaim(new Claim("urn:github:login", context.Login, 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(GithubAuthenticatedContext context)
{
return(OnAuthenticated(context));
}
public virtual Task Authenticated(GithubAuthenticatedContext context)
{
return OnAuthenticated(context);
}
