public static TokenHandleResult HandleIdpIdToken(Session session, idP idP, JWT JWT)
{
SqlCommand cmd = session.db.NewConnection.CreateCommand();
try
{
cmd.Parameters.AddWithValue("@IDPID@", idP.IdpID);
cmd.Parameters.AddWithValue("@SUBJECT@", JWT.Payload["sub"].ToString());
cmd.CommandText = "SELECT UserID FROM [Security.Users] WHERE [OpenID.IdpID] = @IDPID@ AND [OpenID.Subject] = @SUBJECT@";
SqlDataReader rdr = cmd.ExecuteReader();
try
{
if (rdr.HasRows)
{
if (session.UserID == Guid.Empty)
{
rdr.Read();
Guid UserID = rdr.GetGuid(0);
rdr.Close();
UserTools.Logon(session, UserID);
HandleJwtClaims(session, idP, JWT);
return(TokenHandleResult.Success);
}
else
{
return(TokenHandleResult.SubjectAlreadyBoundToAnotherAccount);
}
}
}
finally
{
rdr.Close();
}
if (session.UserID == Guid.Empty)
{
Guid newUserID = UserTools.CreateUser(session.db);
UserTools.Logon(session, newUserID);
}
cmd.Parameters.AddWithValue("@USERID@", session.UserID);
cmd.CommandText = "UPDATE [Security.Users] SET [OpenID.IdpID] = @IDPID@, [OpenID.Subject] = @SUBJECT@ WHERE UserID = @USERID@";
int affected = cmd.ExecuteNonQuery();
if (affected != 1)
{
return(TokenHandleResult.FailedToBindToCurrentUserAccount);
}
HandleJwtClaims(session, idP, JWT);
return(TokenHandleResult.Success);
}
finally
{
cmd.Connection.Close();
}
}
private static bool HandleJwtClaims(Session Session, idP idP, JWT JWT)
{
if (
idP.ClaimsEmail != null &&
idP.ClaimsEmail != "" &&
JWT.Payload.TryGetValue(idP.ClaimsEmail, out object oClaimEmail) &&
MailAddress.TryCreate(oClaimEmail.ToString(), out MailAddress mailAddress)
)
{
UserTools.SetUserEmail(Session.db, Session.UserID, mailAddress);
}
return(true);
}
public static async Task Login(HttpContext con)
{
Session session = con.InitializeSession();
idP idP = OpenID.GetIDP(session.db, Guid.Parse(con.Request.RouteValues["IdpID"].ToString()));
if (idP == null)
{
con.Response.Redirect("/_Error/OpenID/idp-does-not-exist");
return;
}
if (!con.Request.Query.ContainsKey("code") || con.Request.Query["code"] == "")
{
con.Response.Redirect("/_Error/OpenID/code-missing");
return;
}
string code = con.Request.Query["code"];
HttpClient hc = new();
HttpRequestMessage msg = new();
msg.RequestUri = new(idP.EndpointToken);
msg.Method = HttpMethod.Post;
if (idP.ClientSecret != null)
{
byte[] secret = Encoding.Default.GetBytes(HttpUtility.UrlEncode(idP.ClientID) + ":" + idP.ClientSecret);
msg.Headers.Authorization = new("Basic", Convert.ToBase64String(secret));
}
FormUrlEncodedContent form = new(new Dictionary <string, string>()
{
{ "grant_type", "authorization_code" },
{ "code", code },
{ "redirect_uri", idP.GetRedirectURI(session) },
{ "client_id", idP.ClientID }
});
msg.Content = new StreamContent(await form.ReadAsStreamAsync());
msg.Content.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
HttpResponseMessage hResponse = await hc.SendAsync(msg);
try
{
hResponse.EnsureSuccessStatusCode();
}
catch (Exception e)
{
con.Response.Redirect("/_Error/OpenID/token-endpoint-bad-status-response?msg=" + e.Message);
return;
}
Stream sResponse = await hResponse.Content.ReadAsStreamAsync();
Dictionary <string, object> jResposne;
try
{
jResposne = await JsonSerializer.DeserializeAsync <Dictionary <string, object> >(sResponse);
}
catch
{
con.Response.Redirect("/_Error/OpenID/jwt-deserialize-error");
return;
}
if (!jResposne.TryGetValue("id_token", out object idToken))
{
sResponse.Position = 0;
con.Response.Redirect("/_Error/OpenID/jwt-missing?idp_response=" + HttpUtility.UrlEncode(await new StreamReader(sResponse).ReadToEndAsync()));
return;
}
JWT JWT;
try
{
JWT = new(idToken.ToString());
}
catch
{
con.Response.Redirect("/_Error/OpenID/jwt-invalid");
return;
}
OpenID.TokenHandleResult result = OpenID.HandleIdpIdToken(session, idP, JWT);
if (result != OpenID.TokenHandleResult.Success)
{
con.Response.Redirect("/_Error/OpenID/" + result.ToString());
return;
}
con.Response.Redirect("/");
await Task.CompletedTask;
}