2 * PuTTY key generation front end.
10 #define PUTTY_DO_GLOBALS
16 #define WM_DONEKEY (WM_XUSER + 1)
18 #define DEFAULT_KEYSIZE 1024
20 /* ----------------------------------------------------------------------
21 * Progress report code. This is really horrible :-)
23 #define PHASE1TOTAL 0x10000
24 #define PHASE2TOTAL 0x10000
25 #define PHASE3TOTAL 0x04000
27 #define PHASE2START (PHASE1TOTAL)
28 #define PHASE3START (PHASE1TOTAL + PHASE2TOTAL)
29 #define TOTALTOTAL (PHASE1TOTAL + PHASE2TOTAL + PHASE3TOTAL)
30 #define PROGRESSBIGRANGE 65535
31 #define DIVISOR ((TOTALTOTAL + PROGRESSBIGRANGE - 1) / PROGRESSBIGRANGE)
32 #define PROGRESSRANGE (TOTALTOTAL / DIVISOR)
34 unsigned phase1param, phase1current, phase1n;
35 unsigned phase2param, phase2current, phase2n;
40 static void progress_update(void *param, int phase, int iprogress) {
41 struct progress *p = (struct progress *)param;
42 unsigned progress = iprogress;
47 p->phase1param = 0x10000 + progress;
48 p->phase1current = 0x10000; p->phase1n = 0;
51 p->phase2param = 0x10000 + progress;
52 p->phase2current = 0x10000; p->phase2n = 0;
55 p->phase3mult = PHASE3TOTAL / progress;
58 while (p->phase1n < progress) {
60 p->phase1current *= p->phase1param;
61 p->phase1current /= 0x10000;
63 position = PHASE1START + 0x10000 - p->phase1current;
66 while (p->phase2n < progress) {
68 p->phase2current *= p->phase2param;
69 p->phase2current /= 0x10000;
71 position = PHASE2START + 0x10000 - p->phase2current;
74 position = PHASE3START + progress * p->phase3mult;
78 SendMessage(p->progbar, PBM_SETPOS, position / DIVISOR, 0);
83 #define PASSPHRASE_MAXLEN 512
85 struct PassphraseProcStruct {
91 * Dialog-box function for the passphrase box.
93 static int CALLBACK PassphraseProc(HWND hwnd, UINT msg,
94 WPARAM wParam, LPARAM lParam) {
95 static char *passphrase;
96 struct PassphraseProcStruct *p;
100 SetForegroundWindow(hwnd);
101 SetWindowPos (hwnd, HWND_TOP, 0, 0, 0, 0,
102 SWP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW);
103 p = (struct PassphraseProcStruct *)lParam;
104 passphrase = p->passphrase;
106 SetDlgItemText(hwnd, 101, p->comment);
110 switch (LOWORD(wParam)) {
120 case 102: /* edit box */
121 if (HIWORD(wParam) == EN_CHANGE) {
122 GetDlgItemText (hwnd, 102, passphrase, PASSPHRASE_MAXLEN-1);
123 passphrase[PASSPHRASE_MAXLEN-1] = '\0';
136 * Prompt for a key file. Assumes the filename buffer is of size
139 static int prompt_keyfile(HWND hwnd, char *dlgtitle,
140 char *filename, int save) {
142 memset(&of, 0, sizeof(of));
143 #ifdef OPENFILENAME_SIZE_VERSION_400
144 of.lStructSize = OPENFILENAME_SIZE_VERSION_400;
146 of.lStructSize = sizeof(of);
149 of.lpstrFilter = "All Files\0*\0\0\0";
150 of.lpstrCustomFilter = NULL;
152 of.lpstrFile = filename; *filename = '\0';
153 of.nMaxFile = FILENAME_MAX;
154 of.lpstrFileTitle = NULL;
155 of.lpstrInitialDir = NULL;
156 of.lpstrTitle = dlgtitle;
159 return GetSaveFileName(&of);
161 return GetOpenFileName(&of);
165 * This function is needed to link with the DES code. We need not
166 * have it do anything at all.
168 void logevent(char *msg) {
172 * Dialog-box function for the Licence box.
174 static int CALLBACK LicenceProc (HWND hwnd, UINT msg,
175 WPARAM wParam, LPARAM lParam) {
180 switch (LOWORD(wParam)) {
194 * Dialog-box function for the About box.
196 static int CALLBACK AboutProc (HWND hwnd, UINT msg,
197 WPARAM wParam, LPARAM lParam) {
200 SetDlgItemText (hwnd, 100, ver);
203 switch (LOWORD(wParam)) {
208 EnableWindow(hwnd, 0);
209 DialogBox (hinst, MAKEINTRESOURCE(214), NULL, LicenceProc);
210 EnableWindow(hwnd, 1);
211 SetActiveWindow(hwnd);
223 * Thread to generate a key.
225 struct rsa_key_thread_params {
226 HWND progressbar; /* notify this with progress */
227 HWND dialog; /* notify this on completion */
228 int keysize; /* bits in key */
232 static DWORD WINAPI generate_rsa_key_thread(void *param) {
233 struct rsa_key_thread_params *params =
234 (struct rsa_key_thread_params *)param;
235 struct progress prog;
236 prog.progbar = params->progressbar;
238 rsa_generate(params->key, params->aux,
239 params->keysize, progress_update, &prog);
241 PostMessage(params->dialog, WM_DONEKEY, 0, 0);
247 struct MainDlgState {
248 int collecting_entropy;
249 int generation_thread_exists;
251 int entropy_got, entropy_required, entropy_size;
258 static void hidemany(HWND hwnd, const int *ids, int hideit) {
260 ShowWindow(GetDlgItem(hwnd, *ids++), (hideit ? SW_HIDE : SW_SHOW));
264 static void setupbigedit(HWND hwnd, int id, struct RSAKey *key) {
268 dec1 = bignum_decimal(key->exponent);
269 dec2 = bignum_decimal(key->modulus);
270 buffer = malloc(strlen(dec1)+strlen(dec2)+
271 strlen(key->comment)+30);
272 sprintf(buffer, "%d %s %s %s",
273 ssh1_bignum_bitcount(key->modulus),
274 dec1, dec2, key->comment);
275 SetDlgItemText(hwnd, id, buffer);
282 * Dialog-box function for the main PuTTYgen dialog box.
284 static int CALLBACK MainDlgProc (HWND hwnd, UINT msg,
285 WPARAM wParam, LPARAM lParam) {
287 controlidstart = 100,
289 IDC_BOX_KEY, IDC_BOXT_KEY,
293 IDC_PKSTATIC, IDC_KEYDISPLAY,
294 IDC_FPSTATIC, IDC_FINGERPRINT,
295 IDC_COMMENTSTATIC, IDC_COMMENTEDIT,
296 IDC_PASSPHRASE1STATIC, IDC_PASSPHRASE1EDIT,
297 IDC_PASSPHRASE2STATIC, IDC_PASSPHRASE2EDIT,
298 IDC_BOX_ACTIONS, IDC_BOXT_ACTIONS,
299 IDC_GENSTATIC, IDC_GENERATE,
300 IDC_LOADSTATIC, IDC_LOAD,
301 IDC_SAVESTATIC, IDC_SAVE,
302 IDC_BOX_PARAMS, IDC_BOXT_PARAMS,
303 IDC_BITSSTATIC, IDC_BITS,
306 static const int nokey_ids[] = { IDC_NOKEY, 0 };
307 static const int generating_ids[] = { IDC_GENERATING, IDC_PROGRESS, 0 };
308 static const int gotkey_ids[] = {
309 IDC_PKSTATIC, IDC_KEYDISPLAY,
310 IDC_FPSTATIC, IDC_FINGERPRINT,
311 IDC_COMMENTSTATIC, IDC_COMMENTEDIT,
312 IDC_PASSPHRASE1STATIC, IDC_PASSPHRASE1EDIT,
313 IDC_PASSPHRASE2STATIC, IDC_PASSPHRASE2EDIT, 0 };
314 static const char generating_msg[] =
315 "Please wait while a key is generated...";
316 static const char entropy_msg[] =
317 "Please generate some randomness by moving the mouse over the blank area.";
318 struct MainDlgState *state;
322 state = malloc(sizeof(*state));
323 state->generation_thread_exists = FALSE;
324 state->key_exists = FALSE;
325 SetWindowLong(hwnd, GWL_USERDATA, (LONG)state);
327 struct ctlpos cp, cp2;
329 /* Accelerators used: acglops */
331 ctlposinit(&cp, hwnd, 10, 10, 10);
332 bartitle(&cp, "Public and private key generation for PuTTY",
335 IDC_BOX_KEY, IDC_BOXT_KEY);
337 statictext(&cp2, "No key.", IDC_NOKEY);
341 progressbar(&cp2, IDC_PROGRESS);
343 "&Public key for pasting into authorized_keys file:",
344 IDC_PKSTATIC, IDC_KEYDISPLAY, 7);
345 SendDlgItemMessage(hwnd, IDC_KEYDISPLAY, EM_SETREADONLY, 1, 0);
346 staticedit(&cp, "Key fingerprint:", IDC_FPSTATIC,
347 IDC_FINGERPRINT, 70);
348 SendDlgItemMessage(hwnd, IDC_FINGERPRINT, EM_SETREADONLY, 1, 0);
349 staticedit(&cp, "Key &comment:", IDC_COMMENTSTATIC,
350 IDC_COMMENTEDIT, 70);
351 staticpassedit(&cp, "Key p&assphrase:", IDC_PASSPHRASE1STATIC,
352 IDC_PASSPHRASE1EDIT, 70);
353 staticpassedit(&cp, "C&onfirm passphrase:", IDC_PASSPHRASE2STATIC,
354 IDC_PASSPHRASE2EDIT, 70);
356 beginbox(&cp, "Actions",
357 IDC_BOX_ACTIONS, IDC_BOXT_ACTIONS);
358 staticbtn(&cp, "Generate a public/private key pair",
359 IDC_GENSTATIC, "&Generate", IDC_GENERATE);
360 staticbtn(&cp, "Load an existing private key file",
361 IDC_LOADSTATIC, "&Load", IDC_LOAD);
362 staticbtn(&cp, "Save the generated key to a new file",
363 IDC_SAVESTATIC, "&Save", IDC_SAVE);
365 beginbox(&cp, "Parameters",
366 IDC_BOX_PARAMS, IDC_BOXT_PARAMS);
367 staticedit(&cp, "Number of &bits in a generated key:",
368 IDC_BITSSTATIC, IDC_BITS, 20);
371 SetDlgItemInt(hwnd, IDC_BITS, DEFAULT_KEYSIZE, FALSE);
374 * Initially, hide the progress bar and the key display,
375 * and show the no-key display. Also disable the Save
376 * button, because with no key we obviously can't save
379 hidemany(hwnd, nokey_ids, FALSE);
380 hidemany(hwnd, generating_ids, TRUE);
381 hidemany(hwnd, gotkey_ids, TRUE);
382 EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 0);
386 state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
387 if (state->collecting_entropy) {
388 state->entropy[state->entropy_got++] = lParam;
389 state->entropy[state->entropy_got++] = GetMessageTime();
390 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS,
391 state->entropy_got, 0);
392 if (state->entropy_got >= state->entropy_required) {
393 struct rsa_key_thread_params *params;
397 * Seed the entropy pool
399 random_add_heavynoise(state->entropy, state->entropy_size);
400 memset(state->entropy, 0, state->entropy_size);
401 free(state->entropy);
403 SetDlgItemText(hwnd, IDC_GENERATING, generating_msg);
404 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETRANGE, 0,
405 MAKELPARAM(0, PROGRESSRANGE));
406 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS, 0, 0);
408 params = malloc(sizeof(*params));
409 params->progressbar = GetDlgItem(hwnd, IDC_PROGRESS);
410 params->dialog = hwnd;
411 params->keysize = state->keysize;
412 params->key = &state->key;
413 params->aux = &state->aux;
415 if (!CreateThread(NULL, 0, generate_rsa_key_thread,
416 params, 0, &threadid)) {
417 MessageBox(hwnd, "Out of thread resources",
418 "Key generation error",
419 MB_OK | MB_ICONERROR);
422 state->generation_thread_exists = TRUE;
423 state->collecting_entropy = FALSE;
429 switch (LOWORD(wParam)) {
430 case IDC_COMMENTEDIT:
431 if (HIWORD(wParam) == EN_CHANGE) {
432 state = (struct MainDlgState *)
433 GetWindowLong(hwnd, GWL_USERDATA);
434 if (state->key_exists) {
435 HWND editctl = GetDlgItem(hwnd, IDC_COMMENTEDIT);
436 int len = GetWindowTextLength(editctl);
437 if (state->key.comment)
438 free(state->key.comment);
439 state->key.comment = malloc(len+1);
440 GetWindowText(editctl, state->key.comment, len+1);
445 EnableWindow(hwnd, 0);
446 DialogBox (hinst, MAKEINTRESOURCE(213), NULL, AboutProc);
447 EnableWindow(hwnd, 1);
448 SetActiveWindow(hwnd);
451 state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
452 if (!state->generation_thread_exists) {
453 hidemany(hwnd, nokey_ids, TRUE);
454 hidemany(hwnd, generating_ids, FALSE);
455 hidemany(hwnd, gotkey_ids, TRUE);
456 EnableWindow(GetDlgItem(hwnd, IDC_GENERATE), 0);
457 EnableWindow(GetDlgItem(hwnd, IDC_LOAD), 0);
458 EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 0);
459 state->key_exists = FALSE;
460 SetDlgItemText(hwnd, IDC_GENERATING, entropy_msg);
461 state->collecting_entropy = TRUE;
464 state->keysize = GetDlgItemInt(hwnd, IDC_BITS,
466 if (!ok) state->keysize = DEFAULT_KEYSIZE;
470 * My brief statistical tests on mouse movements
471 * suggest that there are about 2.5 bits of
472 * randomness in the x position, 2.5 in the y
473 * position, and 1.7 in the message time, making
474 * 5.7 bits of unpredictability per mouse movement.
475 * However, other people have told me it's far less
476 * than that, so I'm going to be stupidly cautious
477 * and knock that down to a nice round 2. With this
478 * method, we require two words per mouse movement,
479 * so with 2 bits per mouse movement we expect 2
480 * bits every 2 words.
482 state->entropy_required = (state->keysize/2) * 2;
483 state->entropy_got = 0;
484 state->entropy_size = (state->entropy_required *
485 sizeof(*state->entropy));
486 state->entropy = malloc(state->entropy_size);
488 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETRANGE, 0,
489 MAKELPARAM(0, state->entropy_required));
490 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS, 0, 0);
494 state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
495 if (state->key_exists) {
496 char filename[FILENAME_MAX];
497 char passphrase[PASSPHRASE_MAXLEN];
498 char passphrase2[PASSPHRASE_MAXLEN];
499 GetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT,
500 passphrase, sizeof(passphrase));
501 GetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT,
502 passphrase2, sizeof(passphrase2));
503 if (strcmp(passphrase, passphrase2)) {
505 "The two passphrases given do not match.",
507 MB_OK | MB_ICONERROR);
512 ret = MessageBox(hwnd,
513 "Are you sure you want to save this key\n"
514 "without a passphrase to protect it?",
516 MB_YESNO | MB_ICONWARNING);
520 if (prompt_keyfile(hwnd, "Save private key as:",
523 FILE *fp = fopen(filename, "r");
525 char buffer[FILENAME_MAX+80];
527 sprintf(buffer, "Overwrite existing file\n%.*s?",
528 FILENAME_MAX, filename);
529 ret = MessageBox(hwnd, buffer, "PuTTYgen Warning",
530 MB_YESNO | MB_ICONWARNING);
534 ret = saversakey(filename, &state->key, &state->aux,
535 *passphrase ? passphrase : NULL);
537 MessageBox(hwnd, "Unable to save key file",
539 MB_OK | MB_ICONERROR);
545 state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
546 if (!state->generation_thread_exists) {
547 char filename[FILENAME_MAX];
548 if (prompt_keyfile(hwnd, "Load private key:",
550 char passphrase[PASSPHRASE_MAXLEN];
554 struct PassphraseProcStruct pps;
555 struct RSAKey newkey;
556 struct RSAAux newaux;
558 needs_pass = rsakey_encrypted(filename, &comment);
559 pps.passphrase = passphrase;
560 pps.comment = comment;
564 dlgret = DialogBoxParam(hinst,
565 MAKEINTRESOURCE(210),
566 NULL, PassphraseProc,
574 ret = loadrsakey(filename, &newkey, &newaux,
577 if (comment) free(comment);
579 MessageBox(NULL, "Couldn't load private key.",
580 "PuTTYgen Error", MB_OK | MB_ICONERROR);
581 } else if (ret == 1) {
585 EnableWindow(GetDlgItem(hwnd, IDC_GENERATE), 1);
586 EnableWindow(GetDlgItem(hwnd, IDC_LOAD), 1);
587 EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 1);
589 * Now update the key controls with all the
594 SetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT,
596 SetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT,
598 SetDlgItemText(hwnd, IDC_COMMENTEDIT,
601 * Set the key fingerprint.
604 char *savecomment = state->key.comment;
605 state->key.comment = NULL;
606 rsa_fingerprint(buf, sizeof(buf), &state->key);
607 state->key.comment = savecomment;
609 SetDlgItemText(hwnd, IDC_FINGERPRINT, buf);
611 * Construct a decimal representation
612 * of the key, for pasting into
613 * .ssh/authorized_keys on a Unix box.
615 setupbigedit(hwnd, IDC_KEYDISPLAY, &state->key);
618 * Finally, hide the progress bar and show
621 hidemany(hwnd, nokey_ids, TRUE);
622 hidemany(hwnd, generating_ids, TRUE);
623 hidemany(hwnd, gotkey_ids, FALSE);
624 state->key_exists = TRUE;
632 state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
633 state->generation_thread_exists = FALSE;
634 state->key_exists = TRUE;
635 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS, PROGRESSRANGE, 0);
636 EnableWindow(GetDlgItem(hwnd, IDC_GENERATE), 1);
637 EnableWindow(GetDlgItem(hwnd, IDC_LOAD), 1);
638 EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 1);
640 * Invent a comment for the key. We'll do this by including
641 * the date in it. This will be so horrifyingly ugly that
642 * the user will immediately want to change it, which is
645 state->key.comment = malloc(30);
651 strftime(state->key.comment, 30, "rsa-key-%Y%m%d", tm);
655 * Now update the key controls with all the key data.
660 * Blank passphrase, initially. This isn't dangerous,
661 * because we will warn (Are You Sure?) before allowing
662 * the user to save an unprotected private key.
664 SetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT, "");
665 SetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT, "");
669 SetDlgItemText(hwnd, IDC_COMMENTEDIT, state->key.comment);
671 * Set the key fingerprint.
674 char *savecomment = state->key.comment;
675 state->key.comment = NULL;
676 rsa_fingerprint(buf, sizeof(buf), &state->key);
677 state->key.comment = savecomment;
679 SetDlgItemText(hwnd, IDC_FINGERPRINT, buf);
681 * Construct a decimal representation of the key, for
682 * pasting into .ssh/authorized_keys on a Unix box.
684 setupbigedit(hwnd, IDC_KEYDISPLAY, &state->key);
687 * Finally, hide the progress bar and show the key data.
689 hidemany(hwnd, nokey_ids, TRUE);
690 hidemany(hwnd, generating_ids, TRUE);
691 hidemany(hwnd, gotkey_ids, FALSE);
694 state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
702 int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show) {
703 InitCommonControls();
706 return DialogBox(hinst, MAKEINTRESOURCE(201), NULL, MainDlgProc) != IDOK;