2 * PuTTY key generation front end.
13 #define PUTTY_DO_GLOBALS
19 #define WM_DONEKEY (WM_XUSER + 1)
25 * - prompt before overwriting an existing file
26 * - check the return value from saversakey()
27 * - test the generated keys for actual working-RSA-key-hood
31 /* ----------------------------------------------------------------------
32 * Progress report code. This is really horrible :-)
34 #define PHASE1TOTAL 0x10000
35 #define PHASE2TOTAL 0x10000
36 #define PHASE3TOTAL 0x04000
38 #define PHASE2START (PHASE1TOTAL)
39 #define PHASE3START (PHASE1TOTAL + PHASE2TOTAL)
40 #define TOTALTOTAL (PHASE1TOTAL + PHASE2TOTAL + PHASE3TOTAL)
41 #define PROGRESSBIGRANGE 65535
42 #define DIVISOR ((TOTALTOTAL + PROGRESSBIGRANGE - 1) / PROGRESSBIGRANGE)
43 #define PROGRESSRANGE (TOTALTOTAL / DIVISOR)
45 unsigned phase1param
, phase1current
, phase1n
;
46 unsigned phase2param
, phase2current
, phase2n
;
51 static void progress_update(void *param
, int phase
, int iprogress
) {
52 struct progress
*p
= (struct progress
*)param
;
53 unsigned progress
= iprogress
;
58 p
->phase1param
= 0x10000 + progress
;
59 p
->phase1current
= 0x10000; p
->phase1n
= 0;
62 p
->phase2param
= 0x10000 + progress
;
63 p
->phase2current
= 0x10000; p
->phase2n
= 0;
66 p
->phase3mult
= PHASE3TOTAL
/ progress
;
69 while (p
->phase1n
< progress
) {
71 p
->phase1current
*= p
->phase1param
;
72 p
->phase1current
/= 0x10000;
74 position
= PHASE1START
+ 0x10000 - p
->phase1current
;
77 while (p
->phase2n
< progress
) {
79 p
->phase2current
*= p
->phase2param
;
80 p
->phase2current
/= 0x10000;
82 position
= PHASE2START
+ 0x10000 - p
->phase2current
;
85 position
= PHASE3START
+ progress
* p
->phase3mult
;
89 SendMessage(p
->progbar
, PBM_SETPOS
, position
/ DIVISOR
, 0);
94 #define PASSPHRASE_MAXLEN 512
96 struct PassphraseProcStruct
{
102 * Dialog-box function for the passphrase box.
104 static int CALLBACK
PassphraseProc(HWND hwnd
, UINT msg
,
105 WPARAM wParam
, LPARAM lParam
) {
106 static char *passphrase
;
107 struct PassphraseProcStruct
*p
;
111 SetForegroundWindow(hwnd
);
112 SetWindowPos (hwnd
, HWND_TOP
, 0, 0, 0, 0,
113 SWP_NOMOVE
| SWP_NOSIZE
| SWP_SHOWWINDOW
);
114 p
= (struct PassphraseProcStruct
*)lParam
;
115 passphrase
= p
->passphrase
;
117 SetDlgItemText(hwnd
, 101, p
->comment
);
121 switch (LOWORD(wParam
)) {
131 case 102: /* edit box */
132 if (HIWORD(wParam
) == EN_CHANGE
) {
133 GetDlgItemText (hwnd
, 102, passphrase
, PASSPHRASE_MAXLEN
-1);
134 passphrase
[PASSPHRASE_MAXLEN
-1] = '\0';
147 * Prompt for a key file. Assumes the filename buffer is of size
150 static int prompt_keyfile(HWND hwnd
, char *dlgtitle
,
151 char *filename
, int save
) {
153 memset(&of
, 0, sizeof(of
));
154 #ifdef OPENFILENAME_SIZE_VERSION_400
155 of
.lStructSize
= OPENFILENAME_SIZE_VERSION_400
;
157 of
.lStructSize
= sizeof(of
);
160 of
.lpstrFilter
= "All Files\0*\0\0\0";
161 of
.lpstrCustomFilter
= NULL
;
163 of
.lpstrFile
= filename
; *filename
= '\0';
164 of
.nMaxFile
= FILENAME_MAX
;
165 of
.lpstrFileTitle
= NULL
;
166 of
.lpstrInitialDir
= NULL
;
167 of
.lpstrTitle
= dlgtitle
;
170 return GetSaveFileName(&of
);
172 return GetOpenFileName(&of
);
176 * This function is needed to link with the DES code. We need not
177 * have it do anything at all.
179 void logevent(char *msg
) {
183 * Dialog-box function for the Licence box.
185 static int CALLBACK
LicenceProc (HWND hwnd
, UINT msg
,
186 WPARAM wParam
, LPARAM lParam
) {
191 switch (LOWORD(wParam
)) {
205 * Dialog-box function for the About box.
207 static int CALLBACK
AboutProc (HWND hwnd
, UINT msg
,
208 WPARAM wParam
, LPARAM lParam
) {
211 SetDlgItemText (hwnd
, 100, ver
);
214 switch (LOWORD(wParam
)) {
219 EnableWindow(hwnd
, 0);
220 DialogBox (hinst
, MAKEINTRESOURCE(214), NULL
, LicenceProc
);
221 EnableWindow(hwnd
, 1);
222 SetActiveWindow(hwnd
);
234 * Thread to generate a key.
236 struct rsa_key_thread_params
{
237 HWND progressbar
; /* notify this with progress */
238 HWND dialog
; /* notify this on completion */
242 static DWORD WINAPI
generate_rsa_key_thread(void *param
) {
243 struct rsa_key_thread_params
*params
=
244 (struct rsa_key_thread_params
*)param
;
245 struct progress prog
;
246 prog
.progbar
= params
->progressbar
;
248 rsa_generate(params
->key
, params
->aux
, KEYSIZE
, progress_update
, &prog
);
250 PostMessage(params
->dialog
, WM_DONEKEY
, 0, 0);
256 struct MainDlgState
{
257 int collecting_entropy
;
258 int generation_thread_exists
;
260 int entropy_got
, entropy_required
, entropy_size
;
266 static void hidemany(HWND hwnd
, const int *ids
, int hideit
) {
268 ShowWindow(GetDlgItem(hwnd
, *ids
++), (hideit ? SW_HIDE
: SW_SHOW
));
272 static void setupbigedit(HWND hwnd
, int id
, struct RSAKey
*key
) {
276 dec1
= bignum_decimal(key
->exponent
);
277 dec2
= bignum_decimal(key
->modulus
);
278 buffer
= malloc(strlen(dec1
)+strlen(dec2
)+
279 strlen(key
->comment
)+30);
280 sprintf(buffer
, "%d %s %s %s",
281 ssh1_bignum_bitcount(key
->modulus
),
282 dec1
, dec2
, key
->comment
);
283 SetDlgItemText(hwnd
, id
, buffer
);
290 * Dialog-box function for the main PuTTYgen dialog box.
292 static int CALLBACK
MainDlgProc (HWND hwnd
, UINT msg
,
293 WPARAM wParam
, LPARAM lParam
) {
295 controlidstart
= 100,
297 IDC_BOX_KEY
, IDC_BOXT_KEY
,
301 IDC_PKSTATIC
, IDC_KEYDISPLAY
,
302 IDC_FPSTATIC
, IDC_FINGERPRINT
,
303 IDC_COMMENTSTATIC
, IDC_COMMENTEDIT
,
304 IDC_PASSPHRASE1STATIC
, IDC_PASSPHRASE1EDIT
,
305 IDC_PASSPHRASE2STATIC
, IDC_PASSPHRASE2EDIT
,
306 IDC_BOX_ACTIONS
, IDC_BOXT_ACTIONS
,
307 IDC_GENSTATIC
, IDC_GENERATE
,
308 IDC_LOADSTATIC
, IDC_LOAD
,
309 IDC_SAVESTATIC
, IDC_SAVE
,
312 static const int nokey_ids
[] = { IDC_NOKEY
, 0 };
313 static const int generating_ids
[] = { IDC_GENERATING
, IDC_PROGRESS
, 0 };
314 static const int gotkey_ids
[] = {
315 IDC_PKSTATIC
, IDC_KEYDISPLAY
,
316 IDC_FPSTATIC
, IDC_FINGERPRINT
,
317 IDC_COMMENTSTATIC
, IDC_COMMENTEDIT
,
318 IDC_PASSPHRASE1STATIC
, IDC_PASSPHRASE1EDIT
,
319 IDC_PASSPHRASE2STATIC
, IDC_PASSPHRASE2EDIT
, 0 };
320 static const char generating_msg
[] =
321 "Please wait while a key is generated...";
322 static const char entropy_msg
[] =
323 "Please move the mouse in this window to generate randomness";
324 struct MainDlgState
*state
;
328 state
= malloc(sizeof(*state
));
329 state
->generation_thread_exists
= FALSE
;
330 state
->key_exists
= FALSE
;
331 SetWindowLong(hwnd
, GWL_USERDATA
, (LONG
)state
);
333 struct ctlpos cp
, cp2
;
335 /* Accelerators used: acglops */
337 ctlposinit(&cp
, hwnd
, 10, 10, 10);
338 bartitle(&cp
, "Public and private key generation for PuTTY",
341 IDC_BOX_KEY
, IDC_BOXT_KEY
);
343 statictext(&cp2
, "No key.", IDC_NOKEY
);
347 progressbar(&cp2
, IDC_PROGRESS
);
349 "&Public key for pasting into authorized_keys file:",
350 IDC_PKSTATIC
, IDC_KEYDISPLAY
, 7);
351 SendDlgItemMessage(hwnd
, IDC_KEYDISPLAY
, EM_SETREADONLY
, 1, 0);
352 staticedit(&cp
, "Key fingerprint:", IDC_FPSTATIC
,
353 IDC_FINGERPRINT
, 70);
354 SendDlgItemMessage(hwnd
, IDC_FINGERPRINT
, EM_SETREADONLY
, 1, 0);
355 staticedit(&cp
, "Key &comment:", IDC_COMMENTSTATIC
,
356 IDC_COMMENTEDIT
, 70);
357 staticpassedit(&cp
, "Key p&assphrase:", IDC_PASSPHRASE1STATIC
,
358 IDC_PASSPHRASE1EDIT
, 70);
359 staticpassedit(&cp
, "C&onfirm passphrase:", IDC_PASSPHRASE2STATIC
,
360 IDC_PASSPHRASE2EDIT
, 70);
362 beginbox(&cp
, "Actions",
363 IDC_BOX_ACTIONS
, IDC_BOXT_ACTIONS
);
364 staticbtn(&cp
, "Generate a public/private key pair",
365 IDC_GENSTATIC
, "&Generate", IDC_GENERATE
);
366 staticbtn(&cp
, "Load an existing private key file",
367 IDC_LOADSTATIC
, "&Load", IDC_LOAD
);
368 staticbtn(&cp
, "Save the generated key to a new file",
369 IDC_SAVESTATIC
, "&Save", IDC_SAVE
);
373 * Initially, hide the progress bar and the key display,
374 * and show the no-key display. Also disable the Save
375 * button, because with no key we obviously can't save
378 hidemany(hwnd
, nokey_ids
, FALSE
);
379 hidemany(hwnd
, generating_ids
, TRUE
);
380 hidemany(hwnd
, gotkey_ids
, TRUE
);
381 EnableWindow(GetDlgItem(hwnd
, IDC_SAVE
), 0);
385 state
= (struct MainDlgState
*)GetWindowLong(hwnd
, GWL_USERDATA
);
386 if (state
->collecting_entropy
) {
387 state
->entropy
[state
->entropy_got
++] = lParam
;
388 state
->entropy
[state
->entropy_got
++] = GetMessageTime();
389 SendDlgItemMessage(hwnd
, IDC_PROGRESS
, PBM_SETPOS
,
390 state
->entropy_got
, 0);
391 if (state
->entropy_got
>= state
->entropy_required
) {
392 struct rsa_key_thread_params
*params
;
396 * Seed the entropy pool
398 random_add_heavynoise(state
->entropy
, state
->entropy_size
);
399 memset(state
->entropy
, 0, state
->entropy_size
);
400 free(state
->entropy
);
402 SetDlgItemText(hwnd
, IDC_GENERATING
, generating_msg
);
403 SendDlgItemMessage(hwnd
, IDC_PROGRESS
, PBM_SETRANGE
, 0,
404 MAKELPARAM(0, PROGRESSRANGE
));
405 SendDlgItemMessage(hwnd
, IDC_PROGRESS
, PBM_SETPOS
, 0, 0);
407 params
= malloc(sizeof(*params
));
408 params
->progressbar
= GetDlgItem(hwnd
, IDC_PROGRESS
);
409 params
->dialog
= hwnd
;
410 params
->key
= &state
->key
;
411 params
->aux
= &state
->aux
;
413 if (!CreateThread(NULL
, 0, generate_rsa_key_thread
,
414 params
, 0, &threadid
)) {
415 MessageBox(hwnd
, "Out of thread resources",
416 "Key generation error",
417 MB_OK
| MB_ICONERROR
);
420 state
->generation_thread_exists
= TRUE
;
421 state
->collecting_entropy
= FALSE
;
427 switch (LOWORD(wParam
)) {
428 case IDC_COMMENTEDIT
:
429 if (HIWORD(wParam
) == EN_CHANGE
) {
430 state
= (struct MainDlgState
*)
431 GetWindowLong(hwnd
, GWL_USERDATA
);
432 if (state
->key_exists
) {
433 HWND editctl
= GetDlgItem(hwnd
, IDC_COMMENTEDIT
);
434 int len
= GetWindowTextLength(editctl
);
435 if (state
->key
.comment
)
436 free(state
->key
.comment
);
437 state
->key
.comment
= malloc(len
+1);
438 GetWindowText(editctl
, state
->key
.comment
, len
+1);
443 EnableWindow(hwnd
, 0);
444 DialogBox (hinst
, MAKEINTRESOURCE(213), NULL
, AboutProc
);
445 EnableWindow(hwnd
, 1);
446 SetActiveWindow(hwnd
);
449 state
= (struct MainDlgState
*)GetWindowLong(hwnd
, GWL_USERDATA
);
450 if (!state
->generation_thread_exists
) {
451 hidemany(hwnd
, nokey_ids
, TRUE
);
452 hidemany(hwnd
, generating_ids
, FALSE
);
453 hidemany(hwnd
, gotkey_ids
, TRUE
);
454 EnableWindow(GetDlgItem(hwnd
, IDC_GENERATE
), 0);
455 EnableWindow(GetDlgItem(hwnd
, IDC_LOAD
), 0);
456 EnableWindow(GetDlgItem(hwnd
, IDC_SAVE
), 0);
457 state
->key_exists
= FALSE
;
458 SetDlgItemText(hwnd
, IDC_GENERATING
, entropy_msg
);
459 state
->collecting_entropy
= TRUE
;
462 * My brief statistical tests on mouse movements
463 * suggest that there are about 5 bits of
464 * randomness in the x position, 5 in the y
465 * position, and 1.7 in the message time, making
466 * 11.7 bits of unpredictability per mouse
467 * movement. However, other people have told me
468 * it's far less than that, so I'm going to be
469 * stupidly cautious and knock that down to a nice
472 state
->entropy_required
= (KEYSIZE
/ 4) * 2;
473 state
->entropy_got
= 0;
474 state
->entropy_size
= (state
->entropy_required
*
475 sizeof(*state
->entropy
));
476 state
->entropy
= malloc(state
->entropy_size
);
478 SendDlgItemMessage(hwnd
, IDC_PROGRESS
, PBM_SETRANGE
, 0,
479 MAKELPARAM(0, state
->entropy_required
));
480 SendDlgItemMessage(hwnd
, IDC_PROGRESS
, PBM_SETPOS
, 0, 0);
484 state
= (struct MainDlgState
*)GetWindowLong(hwnd
, GWL_USERDATA
);
485 if (state
->key_exists
) {
486 char filename
[FILENAME_MAX
];
487 char passphrase
[PASSPHRASE_MAXLEN
];
488 char passphrase2
[PASSPHRASE_MAXLEN
];
489 GetDlgItemText(hwnd
, IDC_PASSPHRASE1EDIT
,
490 passphrase
, sizeof(passphrase
));
491 GetDlgItemText(hwnd
, IDC_PASSPHRASE2EDIT
,
492 passphrase2
, sizeof(passphrase2
));
493 if (strcmp(passphrase
, passphrase2
)) {
495 "The two passphrases given do not match.",
497 MB_OK
| MB_ICONERROR
);
502 ret
= MessageBox(hwnd
,
503 "Are you sure you want to save this key\n"
504 "without a passphrase to protect it?",
506 MB_YESNO
| MB_ICONWARNING
);
510 if (prompt_keyfile(hwnd
, "Save private key as:",
512 /* FIXME: prompt before overwriting */
513 saversakey(filename
, &state
->key
, &state
->aux
,
514 *passphrase ? passphrase
: NULL
);
515 /* FIXME: check return value */
520 state
= (struct MainDlgState
*)GetWindowLong(hwnd
, GWL_USERDATA
);
521 if (!state
->generation_thread_exists
) {
522 char filename
[FILENAME_MAX
];
523 if (prompt_keyfile(hwnd
, "Load private key:",
525 char passphrase
[PASSPHRASE_MAXLEN
];
529 struct PassphraseProcStruct pps
;
530 struct RSAKey newkey
;
531 struct RSAAux newaux
;
533 needs_pass
= rsakey_encrypted(filename
, &comment
);
534 pps
.passphrase
= passphrase
;
535 pps
.comment
= comment
;
539 dlgret
= DialogBoxParam(hinst
,
540 MAKEINTRESOURCE(210),
541 NULL
, PassphraseProc
,
549 ret
= loadrsakey(filename
, &newkey
, &newaux
,
552 if (comment
) free(comment
);
554 MessageBox(NULL
, "Couldn't load private key.",
555 "PuTTYgen Error", MB_OK
| MB_ICONERROR
);
556 } else if (ret
== 1) {
560 EnableWindow(GetDlgItem(hwnd
, IDC_GENERATE
), 1);
561 EnableWindow(GetDlgItem(hwnd
, IDC_LOAD
), 1);
562 EnableWindow(GetDlgItem(hwnd
, IDC_SAVE
), 1);
564 * Now update the key controls with all the
569 SetDlgItemText(hwnd
, IDC_PASSPHRASE1EDIT
,
571 SetDlgItemText(hwnd
, IDC_PASSPHRASE2EDIT
,
573 SetDlgItemText(hwnd
, IDC_COMMENTEDIT
,
576 * Set the key fingerprint.
579 char *savecomment
= state
->key
.comment
;
580 state
->key
.comment
= NULL
;
581 rsa_fingerprint(buf
, sizeof(buf
), &state
->key
);
582 state
->key
.comment
= savecomment
;
584 SetDlgItemText(hwnd
, IDC_FINGERPRINT
, buf
);
586 * Construct a decimal representation
587 * of the key, for pasting into
588 * .ssh/authorized_keys on a Unix box.
590 setupbigedit(hwnd
, IDC_KEYDISPLAY
, &state
->key
);
593 * Finally, hide the progress bar and show
596 hidemany(hwnd
, nokey_ids
, TRUE
);
597 hidemany(hwnd
, generating_ids
, TRUE
);
598 hidemany(hwnd
, gotkey_ids
, FALSE
);
599 state
->key_exists
= TRUE
;
607 state
= (struct MainDlgState
*)GetWindowLong(hwnd
, GWL_USERDATA
);
608 state
->generation_thread_exists
= FALSE
;
609 state
->key_exists
= TRUE
;
610 SendDlgItemMessage(hwnd
, IDC_PROGRESS
, PBM_SETPOS
, PROGRESSRANGE
, 0);
611 EnableWindow(GetDlgItem(hwnd
, IDC_GENERATE
), 1);
612 EnableWindow(GetDlgItem(hwnd
, IDC_LOAD
), 1);
613 EnableWindow(GetDlgItem(hwnd
, IDC_SAVE
), 1);
615 * Invent a comment for the key. We'll do this by including
616 * the date in it. This will be so horrifyingly ugly that
617 * the user will immediately want to change it, which is
620 state
->key
.comment
= malloc(30);
626 strftime(state
->key
.comment
, 30, "rsa-key-%Y%m%d", tm
);
630 * Now update the key controls with all the key data.
635 * Blank passphrase, initially. This isn't dangerous,
636 * because we will warn (Are You Sure?) before allowing
637 * the user to save an unprotected private key.
639 SetDlgItemText(hwnd
, IDC_PASSPHRASE1EDIT
, "");
640 SetDlgItemText(hwnd
, IDC_PASSPHRASE2EDIT
, "");
644 SetDlgItemText(hwnd
, IDC_COMMENTEDIT
, state
->key
.comment
);
646 * Set the key fingerprint.
649 char *savecomment
= state
->key
.comment
;
650 state
->key
.comment
= NULL
;
651 rsa_fingerprint(buf
, sizeof(buf
), &state
->key
);
652 state
->key
.comment
= savecomment
;
654 SetDlgItemText(hwnd
, IDC_FINGERPRINT
, buf
);
656 * Construct a decimal representation of the key, for
657 * pasting into .ssh/authorized_keys on a Unix box.
659 setupbigedit(hwnd
, IDC_KEYDISPLAY
, &state
->key
);
662 * Finally, hide the progress bar and show the key data.
664 hidemany(hwnd
, nokey_ids
, TRUE
);
665 hidemany(hwnd
, generating_ids
, TRUE
);
666 hidemany(hwnd
, gotkey_ids
, FALSE
);
669 state
= (struct MainDlgState
*)GetWindowLong(hwnd
, GWL_USERDATA
);
677 int WINAPI
WinMain(HINSTANCE inst
, HINSTANCE prev
, LPSTR cmdline
, int show
) {
678 InitCommonControls();
681 return DialogBox(hinst
, MAKEINTRESOURCE(201), NULL
, MainDlgProc
) != IDOK
;