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feat: Delphi backend + JS↔Delphi bridge (clipboard, tray, auto-lock)

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Introduces the Delphi 12 FMX backend (PMServer) that hosts the embedded
WebView2 vault on 127.0.0.1, and a native bridge between JS and Delphi
that wires three privacy-focused features:

1. Secure clipboard
   Copying a password registers the Win32 "ExcludeClipboardContentFromMonitorProcessing"
   format alongside CF_UNICODETEXT, so Win+V clipboard history never sees
   the value. Auto-clears after 30s via TTimer. Bridge.copySecure() in
   app.js routes all password/username/secret copy paths through the
   native layer when running inside the Delphi WebView2 (falls back to
   navigator.clipboard for the PHP standalone).

2. Tray icon (X-to-tray when server running)
   Closing the dev panel hides both the form HWND and the TFMAppClass
   per-process proxy window that owns the FMX taskbar entry — the form's
   HWND alone is not the taskbar-visible one in FMX (took some iteration
   to discover). Tray menu: Open, Lock vault, Quit. Clipboard is force-
   cleared on minimize as extra safety. First-time minimize fires a
   balloon notification so the user knows the app is still running.

3. Auto-lock on Windows session lock (Win+L)
   wtsapi32.dll!WTSRegisterSessionNotification on a dedicated message-only
   window. On WM_WTSSESSION_CHANGE / WTS_SESSION_LOCK, the bridge calls
   ExecuteJavaScript('lockVault()'). Same path used by the tray "Lock vault"
   menu item.

Bridge architecture:
 - JS → Delphi via cmd:// URLs intercepted in OnBeforeNavigate
   (pattern lifted from DeskInsight Monaco). Currently exposes
   cmd://clipboard/copy?text=...&clear=... and cmd://clipboard/clear.
 - Delphi → JS via TTMSFNCWebBrowser.ExecuteJavaScript with guarded
   calls (typeof check) so the bridge degrades cleanly if app.js isn't
   loaded yet.

Files:
 - Source/PM.Bridge.pas (new) — TSecureClipboard + TPMBridge
 - UMainForm.pas/.fmx — bridge wiring, FormCloseQuery intercept, tray
   callbacks (BridgeTrayRestore / BridgeLockRequest / BridgeQuit)
 - js/app.js — Bridge object, 5 navigator.clipboard sites migrated to
   Bridge.copySecure with PHP-compatible fallback, Bridge.onTrayRestore
   handler that resets the auto-lock timer

.gitignore extended with Delphi build artifacts (*.dcu, Win32/, Win64/,
__history/, __recovery/, *.identcache, *.dsk, *.local, etc.) so source
checkouts stay clean.
This commit is contained in:
Zaki
2026-05-22 23:47:57 +01:00
parent 159e02ae81
commit 506aee7e6f
28 changed files with 6172 additions and 1458 deletions
Download Patch File Download Diff File Expand all files Collapse all files
delphi-backend/Handlers/PM.Handler.Auth.pas
+343
View File
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unit PM.Handler.Auth;
(*
/register POST body {username, masterPassword} -> {message,token,userId,salt,csrfToken}
/login POST body {username, masterPassword} -> {message,token,userId,salt,csrfToken}
/logout POST auth + csrf -> {message}
/reauth POST auth + csrf + body{masterPassword} -> {message}
Hashing strategy:
- Delphi creates new accounts with PBKDF2-SHA256 100k iterations (hash_algo='pbkdf2'),
same format as PHP hash_pbkdf2. PHP can verify these too.
- For login, we read hash_algo:
pbkdf2 -> verify natively
bcrypt -> reject with clear message (bcrypt verify not implemented yet)
*)
interface
implementation
uses
System.SysUtils, System.JSON, System.Classes,
FireDAC.Comp.Client,
IdCustomHTTPServer,
PM.Router, PM.JSON, PM.Database, PM.Crypto,
PM.Session, PM.RateLimit, PM.Audit;
const
PBKDF2_ITERATIONS = 100000;
DEFAULT_FOLDERS: array[0..4] of string = ('All', 'Social', 'Banking', 'Work', 'Personal');
procedure EnsureDefaultFolders(AUserId: Integer);
var
LQ: TFDQuery;
I: Integer;
begin
DB.Lock;
try
LQ := TFDQuery.Create(nil);
try
LQ.Connection := DB.Connection;
LQ.SQL.Text :=
'INSERT OR IGNORE INTO folders (user_id, name) VALUES (:uid, :name)';
for I := Low(DEFAULT_FOLDERS) to High(DEFAULT_FOLDERS) do
begin
LQ.ParamByName('uid').AsInteger := AUserId;
LQ.ParamByName('name').AsString := DEFAULT_FOLDERS[I];
LQ.ExecSQL;
end;
finally
LQ.Free;
end;
finally
DB.Unlock;
end;
end;
procedure SendAuthSuccess(AResponse: TIdHTTPResponseInfo;
AUserId: Integer; const AToken, ASalt, ACSRFToken: string);
var
LObj: TJSONObject;
begin
LObj := TJSONObject.Create;
LObj.AddPair('message', 'OK');
LObj.AddPair('token', AToken);
LObj.AddPair('userId', TJSONNumber.Create(AUserId));
LObj.AddPair('salt', ASalt);
LObj.AddPair('csrfToken', ACSRFToken);
TJSONHelper.SendJSON(AResponse, LObj);
end;
// ===== /register =============================================================
procedure HandleRegister(ARequest: TIdHTTPRequestInfo;
AResponse: TIdHTTPResponseInfo; const AParams: TArray<string>);
var
LBody: TJSONObject;
LUser, LPwd, LSalt, LHash, LToken, LCSRF, LIP: string;
LQ: TFDQuery;
LUserId: Integer;
begin
LIP := GetClientIP(ARequest);
if CheckRateLimit(LIP) >= 5 then
begin
TJSONHelper.SendError(AResponse, 429, 'Too many attempts. Try again later.');
Exit;
end;
LBody := TJSONHelper.ReadBody(ARequest);
try
LUser := Trim(LBody.GetValue<string>('username', ''));
LPwd := LBody.GetValue<string>('masterPassword', '');
finally
LBody.Free;
end;
if (Length(LUser) < 3) or (Length(LPwd) < 8) then
begin
TJSONHelper.SendError(AResponse, 400, 'Min 3/8 chars');
Exit;
end;
DB.Lock;
try
LQ := TFDQuery.Create(nil);
try
LQ.Connection := DB.Connection;
LQ.SQL.Text := 'SELECT id FROM users WHERE username = :u';
LQ.ParamByName('u').AsString := LUser;
LQ.Open;
if not LQ.IsEmpty then
begin
TJSONHelper.SendError(AResponse, 409, 'Username exists');
Exit;
end;
finally
LQ.Free;
end;
LSalt := RandomHex(32);
LHash := PBKDF2_SHA256_Hex(LPwd, LSalt, PBKDF2_ITERATIONS);
LQ := TFDQuery.Create(nil);
try
LQ.Connection := DB.Connection;
LQ.SQL.Text :=
'INSERT INTO users (username, password_hash, salt, hash_algo) ' +
'VALUES (:u, :h, :s, ''pbkdf2'')';
LQ.ParamByName('u').AsString := LUser;
LQ.ParamByName('h').AsString := LHash;
LQ.ParamByName('s').AsString := LSalt;
LQ.ExecSQL;
LUserId := DB.Connection.GetLastAutoGenValue('users');
finally
LQ.Free;
end;
finally
DB.Unlock;
end;
EnsureDefaultFolders(LUserId);
CreateSession(LUserId, LToken, LCSRF);
LogAudit(LUserId, 'register', LIP);
SendAuthSuccess(AResponse, LUserId, LToken, LSalt, LCSRF);
end;
// ===== /login ================================================================
procedure HandleLogin(ARequest: TIdHTTPRequestInfo;
AResponse: TIdHTTPResponseInfo; const AParams: TArray<string>);
var
LBody: TJSONObject;
LUser, LPwd, LSalt, LStoredHash, LAlgo, LToken, LCSRF, LIP: string;
LUserId: Integer;
LQ: TFDQuery;
LComputed: string;
LValid: Boolean;
begin
LIP := GetClientIP(ARequest);
if CheckRateLimit(LIP) >= 10 then
begin
TJSONHelper.SendError(AResponse, 429, 'Too many attempts. Try again later.');
Exit;
end;
LBody := TJSONHelper.ReadBody(ARequest);
try
LUser := Trim(LBody.GetValue<string>('username', ''));
LPwd := LBody.GetValue<string>('masterPassword', '');
finally
LBody.Free;
end;
DB.Lock;
try
LQ := TFDQuery.Create(nil);
try
LQ.Connection := DB.Connection;
LQ.SQL.Text :=
'SELECT id, password_hash, salt, hash_algo FROM users WHERE username = :u';
LQ.ParamByName('u').AsString := LUser;
LQ.Open;
if LQ.IsEmpty then
begin
RecordAttempt(LIP);
TJSONHelper.SendError(AResponse, 401, 'Invalid credentials');
Exit;
end;
LUserId := LQ.FieldByName('id').AsInteger;
LStoredHash := LQ.FieldByName('password_hash').AsString;
LSalt := LQ.FieldByName('salt').AsString;
LAlgo := LQ.FieldByName('hash_algo').AsString;
if LAlgo = '' then LAlgo := 'pbkdf2';
finally
LQ.Free;
end;
finally
DB.Unlock;
end;
LValid := False;
if SameText(LAlgo, 'pbkdf2') then
begin
LComputed := PBKDF2_SHA256_Hex(LPwd, LSalt, PBKDF2_ITERATIONS);
LValid := ConstantTimeEquals(LComputed, LStoredHash);
end
else if SameText(LAlgo, 'bcrypt') then
begin
// Not implemented in Delphi backend yet
RecordAttempt(LIP);
LogAudit(LUserId, 'failed_login_bcrypt', LIP);
TJSONHelper.SendError(AResponse, 501,
'This account was created with bcrypt (PHP). The Delphi backend does ' +
'not verify bcrypt yet. Register a new account here, or login via PHP.');
Exit;
end;
if not LValid then
begin
RecordAttempt(LIP);
LogAudit(LUserId, 'failed_login', LIP);
TJSONHelper.SendError(AResponse, 401, 'Invalid credentials');
Exit;
end;
ClearAttempts(LIP);
DeleteAllUserSessions(LUserId);
EnsureDefaultFolders(LUserId);
CreateSession(LUserId, LToken, LCSRF);
LogAudit(LUserId, 'login', LIP);
SendAuthSuccess(AResponse, LUserId, LToken, LSalt, LCSRF);
end;
// ===== /logout ===============================================================
procedure HandleLogout(ARequest: TIdHTTPRequestInfo;
AResponse: TIdHTTPResponseInfo; const AParams: TArray<string>);
var
LUserId: Integer;
LToken, LAuth: string;
begin
try
LUserId := Authenticate(ARequest, AResponse);
RequireCSRF(ARequest, AResponse, LUserId);
except
on ESessionRejected do Exit;
end;
LAuth := ARequest.RawHeaders.Values['Authorization'];
if LAuth.StartsWith('Bearer ', True) then
begin
LToken := Copy(LAuth, 8, MaxInt);
DeleteSessionByTokenHash(SHA256Hex(LToken));
end;
LogAudit(LUserId, 'logout', GetClientIP(ARequest));
TJSONHelper.SendOK(AResponse, 'Logged out');
end;
// ===== /reauth ===============================================================
procedure HandleReauth(ARequest: TIdHTTPRequestInfo;
AResponse: TIdHTTPResponseInfo; const AParams: TArray<string>);
var
LUserId: Integer;
LBody: TJSONObject;
LPwd, LStoredHash, LSalt, LAlgo, LIP, LComputed: string;
LQ: TFDQuery;
LValid: Boolean;
begin
try
LUserId := Authenticate(ARequest, AResponse);
RequireCSRF(ARequest, AResponse, LUserId);
except
on ESessionRejected do Exit;
end;
LIP := GetClientIP(ARequest);
if CheckRateLimit(LIP) >= 5 then
begin
TJSONHelper.SendError(AResponse, 429, 'Too many attempts. Try again later.');
Exit;
end;
LBody := TJSONHelper.ReadBody(ARequest);
try
LPwd := LBody.GetValue<string>('masterPassword', '');
finally
LBody.Free;
end;
DB.Lock;
try
LQ := TFDQuery.Create(nil);
try
LQ.Connection := DB.Connection;
LQ.SQL.Text := 'SELECT password_hash, salt, hash_algo FROM users WHERE id = :uid';
LQ.ParamByName('uid').AsInteger := LUserId;
LQ.Open;
if LQ.IsEmpty then
begin
RecordAttempt(LIP);
TJSONHelper.SendError(AResponse, 401, 'User not found');
Exit;
end;
LStoredHash := LQ.FieldByName('password_hash').AsString;
LSalt := LQ.FieldByName('salt').AsString;
LAlgo := LQ.FieldByName('hash_algo').AsString;
if LAlgo = '' then LAlgo := 'pbkdf2';
finally
LQ.Free;
end;
finally
DB.Unlock;
end;
LValid := False;
if SameText(LAlgo, 'pbkdf2') then
begin
LComputed := PBKDF2_SHA256_Hex(LPwd, LSalt, PBKDF2_ITERATIONS);
LValid := ConstantTimeEquals(LComputed, LStoredHash);
end;
if not LValid then
begin
RecordAttempt(LIP);
LogAudit(LUserId, 'failed_reauth', LIP);
TJSONHelper.SendError(AResponse, 401, 'Invalid password');
Exit;
end;
ClearAttempts(LIP);
LogAudit(LUserId, 'reauth', LIP);
TJSONHelper.SendOK(AResponse, 'OK');
end;
initialization
Router.Register('POST', '/register', HandleRegister);
Router.Register('POST', '/login', HandleLogin);
Router.Register('POST', '/logout', HandleLogout);
Router.Register('POST', '/reauth', HandleReauth);
end.