/// <summary>
/// For AuthenticationMode = Active, this gets invoked first when any request comes in.
/// But its best to keep it Passive for this logic to work.
/// This needs to go and fetch the identity claims from the 3rd party STS.
/// </summary>
protected override async Task <AuthenticationTicket> AuthenticateCoreAsync()
{
AuthenticationProperties properties = null;
try
{
string state = null;
var query = Request.Query;
var 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));
}
var thirdPartyState = properties.Dictionary[ThirdPartyStateKey];
properties.Dictionary.Remove(ThirdPartyStateKey);
var decodedThirdPartyState = DecodeState(thirdPartyState);
var thirdPartyClaims = await ValidateToken(decodedThirdPartyState.ClientId, decodedThirdPartyState.Token);
var context = new ThirdPartyAuthenticatedContext(Context)
{
Identity = new ClaimsIdentity(
Options.AuthenticationType,
ClaimsIdentity.DefaultNameClaimType,
ClaimsIdentity.DefaultRoleClaimType)
};
context.Identity.AddClaim(new Claim(ClaimTypes.NameIdentifier, thirdPartyClaims.Claims.Single(p => p.Type == ClaimTypes.NameIdentifier).Value, 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 Task Authenticated(ThirdPartyAuthenticatedContext context)
{
return(OnAuthenticated(context));
}
