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Complete analysis of the magic ASN.1 stuff in RSASSA signatures
[sgt/putty] / puttygen.c
CommitLineData
6e522441 1/*
2 * PuTTY key generation front end.
3 */
4
5#include <windows.h>
6#include <commctrl.h>
7#include <time.h>
6e522441 8#include <stdio.h>
49bad831 9#include <stdlib.h>
6e522441 10
11#define PUTTY_DO_GLOBALS
12
13#include "putty.h"
14#include "ssh.h"
15#include "winstuff.h"
16
17#define WM_DONEKEY (WM_XUSER + 1)
18
0c2986d0 19#define DEFAULT_KEYSIZE 1024
6e522441 20
6e522441 21/* ----------------------------------------------------------------------
22 * Progress report code. This is really horrible :-)
23 */
24#define PHASE1TOTAL 0x10000
25#define PHASE2TOTAL 0x10000
26#define PHASE3TOTAL 0x04000
27#define PHASE1START 0
28#define PHASE2START (PHASE1TOTAL)
29#define PHASE3START (PHASE1TOTAL + PHASE2TOTAL)
30#define TOTALTOTAL (PHASE1TOTAL + PHASE2TOTAL + PHASE3TOTAL)
31#define PROGRESSBIGRANGE 65535
32#define DIVISOR ((TOTALTOTAL + PROGRESSBIGRANGE - 1) / PROGRESSBIGRANGE)
33#define PROGRESSRANGE (TOTALTOTAL / DIVISOR)
34struct progress {
35 unsigned phase1param, phase1current, phase1n;
36 unsigned phase2param, phase2current, phase2n;
37 unsigned phase3mult;
38 HWND progbar;
39};
40
41static void progress_update(void *param, int phase, int iprogress) {
42 struct progress *p = (struct progress *)param;
43 unsigned progress = iprogress;
44 int position;
45
46 switch (phase) {
47 case -1:
48 p->phase1param = 0x10000 + progress;
49 p->phase1current = 0x10000; p->phase1n = 0;
50 return;
51 case -2:
52 p->phase2param = 0x10000 + progress;
53 p->phase2current = 0x10000; p->phase2n = 0;
54 return;
55 case -3:
56 p->phase3mult = PHASE3TOTAL / progress;
57 return;
58 case 1:
59 while (p->phase1n < progress) {
60 p->phase1n++;
61 p->phase1current *= p->phase1param;
62 p->phase1current /= 0x10000;
63 }
64 position = PHASE1START + 0x10000 - p->phase1current;
65 break;
66 case 2:
67 while (p->phase2n < progress) {
68 p->phase2n++;
69 p->phase2current *= p->phase2param;
70 p->phase2current /= 0x10000;
71 }
72 position = PHASE2START + 0x10000 - p->phase2current;
73 break;
74 case 3:
75 position = PHASE3START + progress * p->phase3mult;
76 break;
77 }
78
79 SendMessage(p->progbar, PBM_SETPOS, position / DIVISOR, 0);
80}
81
82extern char ver[];
83
84#define PASSPHRASE_MAXLEN 512
85
86struct PassphraseProcStruct {
87 char *passphrase;
88 char *comment;
89};
90
91/*
92 * Dialog-box function for the passphrase box.
93 */
94static int CALLBACK PassphraseProc(HWND hwnd, UINT msg,
95 WPARAM wParam, LPARAM lParam) {
96 static char *passphrase;
97 struct PassphraseProcStruct *p;
98
99 switch (msg) {
100 case WM_INITDIALOG:
101 SetForegroundWindow(hwnd);
102 SetWindowPos (hwnd, HWND_TOP, 0, 0, 0, 0,
103 SWP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW);
65a22376 104
105 /*
106 * Centre the window.
107 */
108 { /* centre the window */
109 RECT rs, rd;
110 HWND hw;
111
112 hw = GetDesktopWindow();
113 if (GetWindowRect (hw, &rs) && GetWindowRect (hwnd, &rd))
114 MoveWindow (hwnd, (rs.right + rs.left + rd.left - rd.right)/2,
115 (rs.bottom + rs.top + rd.top - rd.bottom)/2,
116 rd.right-rd.left, rd.bottom-rd.top, TRUE);
117 }
118
6e522441 119 p = (struct PassphraseProcStruct *)lParam;
120 passphrase = p->passphrase;
121 if (p->comment)
122 SetDlgItemText(hwnd, 101, p->comment);
123 *passphrase = 0;
124 return 0;
125 case WM_COMMAND:
126 switch (LOWORD(wParam)) {
127 case IDOK:
128 if (*passphrase)
129 EndDialog (hwnd, 1);
130 else
131 MessageBeep (0);
132 return 0;
133 case IDCANCEL:
134 EndDialog (hwnd, 0);
135 return 0;
136 case 102: /* edit box */
137 if (HIWORD(wParam) == EN_CHANGE) {
138 GetDlgItemText (hwnd, 102, passphrase, PASSPHRASE_MAXLEN-1);
139 passphrase[PASSPHRASE_MAXLEN-1] = '\0';
140 }
141 return 0;
142 }
143 return 0;
144 case WM_CLOSE:
145 EndDialog (hwnd, 0);
146 return 0;
147 }
148 return 0;
149}
150
151/*
152 * Prompt for a key file. Assumes the filename buffer is of size
153 * FILENAME_MAX.
154 */
155static int prompt_keyfile(HWND hwnd, char *dlgtitle,
156 char *filename, int save) {
157 OPENFILENAME of;
158 memset(&of, 0, sizeof(of));
159#ifdef OPENFILENAME_SIZE_VERSION_400
160 of.lStructSize = OPENFILENAME_SIZE_VERSION_400;
161#else
162 of.lStructSize = sizeof(of);
163#endif
164 of.hwndOwner = hwnd;
165 of.lpstrFilter = "All Files\0*\0\0\0";
166 of.lpstrCustomFilter = NULL;
167 of.nFilterIndex = 1;
168 of.lpstrFile = filename; *filename = '\0';
169 of.nMaxFile = FILENAME_MAX;
170 of.lpstrFileTitle = NULL;
171 of.lpstrInitialDir = NULL;
172 of.lpstrTitle = dlgtitle;
173 of.Flags = 0;
174 if (save)
175 return GetSaveFileName(&of);
176 else
177 return GetOpenFileName(&of);
178}
179
180/*
181 * This function is needed to link with the DES code. We need not
182 * have it do anything at all.
183 */
184void logevent(char *msg) {
185}
186
187/*
188 * Dialog-box function for the Licence box.
189 */
190static int CALLBACK LicenceProc (HWND hwnd, UINT msg,
191 WPARAM wParam, LPARAM lParam) {
192 switch (msg) {
193 case WM_INITDIALOG:
65a22376 194 /*
195 * Centre the window.
196 */
197 { /* centre the window */
198 RECT rs, rd;
199 HWND hw;
200
201 hw = GetDesktopWindow();
202 if (GetWindowRect (hw, &rs) && GetWindowRect (hwnd, &rd))
203 MoveWindow (hwnd, (rs.right + rs.left + rd.left - rd.right)/2,
204 (rs.bottom + rs.top + rd.top - rd.bottom)/2,
205 rd.right-rd.left, rd.bottom-rd.top, TRUE);
206 }
207
6e522441 208 return 1;
209 case WM_COMMAND:
210 switch (LOWORD(wParam)) {
211 case IDOK:
212 EndDialog(hwnd, 1);
213 return 0;
214 }
215 return 0;
216 case WM_CLOSE:
217 EndDialog(hwnd, 1);
218 return 0;
219 }
220 return 0;
221}
222
223/*
224 * Dialog-box function for the About box.
225 */
226static int CALLBACK AboutProc (HWND hwnd, UINT msg,
227 WPARAM wParam, LPARAM lParam) {
228 switch (msg) {
229 case WM_INITDIALOG:
65a22376 230 /*
231 * Centre the window.
232 */
233 { /* centre the window */
234 RECT rs, rd;
235 HWND hw;
236
237 hw = GetDesktopWindow();
238 if (GetWindowRect (hw, &rs) && GetWindowRect (hwnd, &rd))
239 MoveWindow (hwnd, (rs.right + rs.left + rd.left - rd.right)/2,
240 (rs.bottom + rs.top + rd.top - rd.bottom)/2,
241 rd.right-rd.left, rd.bottom-rd.top, TRUE);
242 }
243
6e522441 244 SetDlgItemText (hwnd, 100, ver);
245 return 1;
246 case WM_COMMAND:
247 switch (LOWORD(wParam)) {
248 case IDOK:
249 EndDialog(hwnd, 1);
250 return 0;
251 case 101:
252 EnableWindow(hwnd, 0);
253 DialogBox (hinst, MAKEINTRESOURCE(214), NULL, LicenceProc);
254 EnableWindow(hwnd, 1);
255 SetActiveWindow(hwnd);
256 return 0;
257 }
258 return 0;
259 case WM_CLOSE:
260 EndDialog(hwnd, 1);
261 return 0;
262 }
263 return 0;
264}
265
266/*
267 * Thread to generate a key.
268 */
269struct rsa_key_thread_params {
270 HWND progressbar; /* notify this with progress */
271 HWND dialog; /* notify this on completion */
0c2986d0 272 int keysize; /* bits in key */
6e522441 273 struct RSAKey *key;
6e522441 274};
275static DWORD WINAPI generate_rsa_key_thread(void *param) {
276 struct rsa_key_thread_params *params =
277 (struct rsa_key_thread_params *)param;
278 struct progress prog;
279 prog.progbar = params->progressbar;
280
65a22376 281 rsa_generate(params->key, params->keysize, progress_update, &prog);
6e522441 282
283 PostMessage(params->dialog, WM_DONEKEY, 0, 0);
284
dcbde236 285 sfree(params);
6e522441 286 return 0;
287}
288
289struct MainDlgState {
290 int collecting_entropy;
291 int generation_thread_exists;
292 int key_exists;
293 int entropy_got, entropy_required, entropy_size;
0c2986d0 294 int keysize;
65a22376 295 int ssh2;
296 char **commentptr; /* points to key.comment or ssh2key.comment */
297 struct ssh2_userkey ssh2key;
6e522441 298 unsigned *entropy;
299 struct RSAKey key;
6e522441 300};
301
302static void hidemany(HWND hwnd, const int *ids, int hideit) {
303 while (*ids) {
304 ShowWindow(GetDlgItem(hwnd, *ids++), (hideit ? SW_HIDE : SW_SHOW));
305 }
306}
307
65a22376 308static void setupbigedit1(HWND hwnd, int id, struct RSAKey *key) {
6e522441 309 char *buffer;
310 char *dec1, *dec2;
311
312 dec1 = bignum_decimal(key->exponent);
313 dec2 = bignum_decimal(key->modulus);
dcbde236 314 buffer = smalloc(strlen(dec1)+strlen(dec2)+
315 strlen(key->comment)+30);
6e522441 316 sprintf(buffer, "%d %s %s %s",
317 ssh1_bignum_bitcount(key->modulus),
318 dec1, dec2, key->comment);
319 SetDlgItemText(hwnd, id, buffer);
dcbde236 320 sfree(dec1);
321 sfree(dec2);
322 sfree(buffer);
6e522441 323}
324
65a22376 325static void setupbigedit2(HWND hwnd, int id, struct ssh2_userkey *key) {
326 unsigned char *pub_blob;
327 char *buffer, *p;
328 int pub_len, buflen;
329 int i;
330
331 pub_blob = key->alg->public_blob(key->data, &pub_len);
332 buffer = smalloc(strlen(key->alg->name) + 4*((pub_len+2)/3) +
333 strlen(key->comment) + 3);
334 strcpy(buffer, key->alg->name);
335 p = buffer + strlen(buffer);
336 *p++ = ' ';
337 i = 0;
338 while (i < pub_len) {
339 int n = (pub_len-i < 3 ? pub_len-i : 3);
340 base64_encode_atom(pub_blob+i, n, p);
341 i += n;
342 p += 4;
343 }
344 *p++ = ' ';
345 strcpy(p, key->comment);
346 SetDlgItemText(hwnd, id, buffer);
347 sfree(pub_blob);
348 sfree(buffer);
349}
350
6e522441 351/*
352 * Dialog-box function for the main PuTTYgen dialog box.
353 */
354static int CALLBACK MainDlgProc (HWND hwnd, UINT msg,
355 WPARAM wParam, LPARAM lParam) {
356 enum {
357 controlidstart = 100,
358 IDC_TITLE,
630ce4de 359 IDC_BOX_KEY,
6e522441 360 IDC_NOKEY,
361 IDC_GENERATING,
362 IDC_PROGRESS,
363 IDC_PKSTATIC, IDC_KEYDISPLAY,
364 IDC_FPSTATIC, IDC_FINGERPRINT,
365 IDC_COMMENTSTATIC, IDC_COMMENTEDIT,
a5470c60 366 IDC_PASSPHRASE1STATIC, IDC_PASSPHRASE1EDIT,
367 IDC_PASSPHRASE2STATIC, IDC_PASSPHRASE2EDIT,
630ce4de 368 IDC_BOX_ACTIONS,
6e522441 369 IDC_GENSTATIC, IDC_GENERATE,
370 IDC_LOADSTATIC, IDC_LOAD,
371 IDC_SAVESTATIC, IDC_SAVE,
630ce4de 372 IDC_BOX_PARAMS,
65a22376 373 IDC_TYPESTATIC, IDC_KEYSSH1, IDC_KEYSSH2RSA,
0c2986d0 374 IDC_BITSSTATIC, IDC_BITS,
6e522441 375 IDC_ABOUT,
376 };
377 static const int nokey_ids[] = { IDC_NOKEY, 0 };
378 static const int generating_ids[] = { IDC_GENERATING, IDC_PROGRESS, 0 };
379 static const int gotkey_ids[] = {
380 IDC_PKSTATIC, IDC_KEYDISPLAY,
381 IDC_FPSTATIC, IDC_FINGERPRINT,
382 IDC_COMMENTSTATIC, IDC_COMMENTEDIT,
a5470c60 383 IDC_PASSPHRASE1STATIC, IDC_PASSPHRASE1EDIT,
384 IDC_PASSPHRASE2STATIC, IDC_PASSPHRASE2EDIT, 0 };
6e522441 385 static const char generating_msg[] =
386 "Please wait while a key is generated...";
387 static const char entropy_msg[] =
47c98e43 388 "Please generate some randomness by moving the mouse over the blank area.";
6e522441 389 struct MainDlgState *state;
390
391 switch (msg) {
392 case WM_INITDIALOG:
65a22376 393 /*
394 * Centre the window.
395 */
396 { /* centre the window */
397 RECT rs, rd;
398 HWND hw;
399
400 hw = GetDesktopWindow();
401 if (GetWindowRect (hw, &rs) && GetWindowRect (hwnd, &rd))
402 MoveWindow (hwnd, (rs.right + rs.left + rd.left - rd.right)/2,
403 (rs.bottom + rs.top + rd.top - rd.bottom)/2,
404 rd.right-rd.left, rd.bottom-rd.top, TRUE);
405 }
406
dcbde236 407 state = smalloc(sizeof(*state));
6e522441 408 state->generation_thread_exists = FALSE;
b8957e43 409 state->collecting_entropy = FALSE;
410 state->entropy = NULL;
6e522441 411 state->key_exists = FALSE;
412 SetWindowLong(hwnd, GWL_USERDATA, (LONG)state);
413 {
414 struct ctlpos cp, cp2;
415
a5470c60 416 /* Accelerators used: acglops */
417
6e522441 418 ctlposinit(&cp, hwnd, 10, 10, 10);
419 bartitle(&cp, "Public and private key generation for PuTTY",
420 IDC_TITLE);
421 beginbox(&cp, "Key",
630ce4de 422 IDC_BOX_KEY);
6e522441 423 cp2 = cp;
424 statictext(&cp2, "No key.", IDC_NOKEY);
425 cp2 = cp;
426 statictext(&cp2, "",
427 IDC_GENERATING);
428 progressbar(&cp2, IDC_PROGRESS);
429 bigeditctrl(&cp,
430 "&Public key for pasting into authorized_keys file:",
431 IDC_PKSTATIC, IDC_KEYDISPLAY, 7);
432 SendDlgItemMessage(hwnd, IDC_KEYDISPLAY, EM_SETREADONLY, 1, 0);
433 staticedit(&cp, "Key fingerprint:", IDC_FPSTATIC,
65a22376 434 IDC_FINGERPRINT, 75);
6e522441 435 SendDlgItemMessage(hwnd, IDC_FINGERPRINT, EM_SETREADONLY, 1, 0);
436 staticedit(&cp, "Key &comment:", IDC_COMMENTSTATIC,
65a22376 437 IDC_COMMENTEDIT, 75);
a5470c60 438 staticpassedit(&cp, "Key p&assphrase:", IDC_PASSPHRASE1STATIC,
65a22376 439 IDC_PASSPHRASE1EDIT, 75);
a5470c60 440 staticpassedit(&cp, "C&onfirm passphrase:", IDC_PASSPHRASE2STATIC,
65a22376 441 IDC_PASSPHRASE2EDIT, 75);
6e522441 442 endbox(&cp);
443 beginbox(&cp, "Actions",
630ce4de 444 IDC_BOX_ACTIONS);
6e522441 445 staticbtn(&cp, "Generate a public/private key pair",
446 IDC_GENSTATIC, "&Generate", IDC_GENERATE);
447 staticbtn(&cp, "Load an existing private key file",
448 IDC_LOADSTATIC, "&Load", IDC_LOAD);
449 staticbtn(&cp, "Save the generated key to a new file",
450 IDC_SAVESTATIC, "&Save", IDC_SAVE);
451 endbox(&cp);
ec68f104 452 beginbox(&cp, "Parameters",
630ce4de 453 IDC_BOX_PARAMS);
65a22376 454 radioline(&cp, "Type of key to generate:", IDC_TYPESTATIC, 2,
455 "SSH&1 (RSA)", IDC_KEYSSH1,
456 "SSH2 &RSA", IDC_KEYSSH2RSA, NULL);
47c98e43 457 staticedit(&cp, "Number of &bits in a generated key:",
0c2986d0 458 IDC_BITSSTATIC, IDC_BITS, 20);
459 endbox(&cp);
6e522441 460 }
65a22376 461 CheckRadioButton(hwnd, IDC_KEYSSH1, IDC_KEYSSH2RSA, IDC_KEYSSH1);
0c2986d0 462 SetDlgItemInt(hwnd, IDC_BITS, DEFAULT_KEYSIZE, FALSE);
463
6e522441 464 /*
465 * Initially, hide the progress bar and the key display,
466 * and show the no-key display. Also disable the Save
467 * button, because with no key we obviously can't save
468 * anything.
469 */
470 hidemany(hwnd, nokey_ids, FALSE);
471 hidemany(hwnd, generating_ids, TRUE);
472 hidemany(hwnd, gotkey_ids, TRUE);
473 EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 0);
474
475 return 1;
476 case WM_MOUSEMOVE:
477 state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
b8957e43 478 if (state->collecting_entropy &&
479 state->entropy &&
480 state->entropy_got < state->entropy_required) {
6e522441 481 state->entropy[state->entropy_got++] = lParam;
482 state->entropy[state->entropy_got++] = GetMessageTime();
483 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS,
484 state->entropy_got, 0);
485 if (state->entropy_got >= state->entropy_required) {
486 struct rsa_key_thread_params *params;
487 DWORD threadid;
488
489 /*
490 * Seed the entropy pool
491 */
492 random_add_heavynoise(state->entropy, state->entropy_size);
493 memset(state->entropy, 0, state->entropy_size);
dcbde236 494 sfree(state->entropy);
b8957e43 495 state->collecting_entropy = FALSE;
6e522441 496
497 SetDlgItemText(hwnd, IDC_GENERATING, generating_msg);
498 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETRANGE, 0,
499 MAKELPARAM(0, PROGRESSRANGE));
500 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS, 0, 0);
501
dcbde236 502 params = smalloc(sizeof(*params));
6e522441 503 params->progressbar = GetDlgItem(hwnd, IDC_PROGRESS);
504 params->dialog = hwnd;
0c2986d0 505 params->keysize = state->keysize;
6e522441 506 params->key = &state->key;
6e522441 507
508 if (!CreateThread(NULL, 0, generate_rsa_key_thread,
509 params, 0, &threadid)) {
510 MessageBox(hwnd, "Out of thread resources",
511 "Key generation error",
512 MB_OK | MB_ICONERROR);
dcbde236 513 sfree(params);
6e522441 514 } else {
515 state->generation_thread_exists = TRUE;
6e522441 516 }
517 }
518 }
519 break;
520 case WM_COMMAND:
521 switch (LOWORD(wParam)) {
522 case IDC_COMMENTEDIT:
523 if (HIWORD(wParam) == EN_CHANGE) {
524 state = (struct MainDlgState *)
525 GetWindowLong(hwnd, GWL_USERDATA);
526 if (state->key_exists) {
527 HWND editctl = GetDlgItem(hwnd, IDC_COMMENTEDIT);
528 int len = GetWindowTextLength(editctl);
65a22376 529 if (*state->commentptr)
530 sfree(*state->commentptr);
531 *state->commentptr = smalloc(len+1);
532 GetWindowText(editctl, *state->commentptr, len+1);
6e522441 533 }
534 }
535 break;
536 case IDC_ABOUT:
537 EnableWindow(hwnd, 0);
538 DialogBox (hinst, MAKEINTRESOURCE(213), NULL, AboutProc);
539 EnableWindow(hwnd, 1);
540 SetActiveWindow(hwnd);
541 return 0;
542 case IDC_GENERATE:
543 state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
544 if (!state->generation_thread_exists) {
e28350d4 545 BOOL ok;
546 state->keysize = GetDlgItemInt(hwnd, IDC_BITS,
547 &ok, FALSE);
548 if (!ok) state->keysize = DEFAULT_KEYSIZE;
65a22376 549 /* If we ever introduce a new key type, check it here! */
550 state->ssh2 = !IsDlgButtonChecked(hwnd, IDC_KEYSSH1);
e28350d4 551 if (state->keysize < 256) {
552 int ret = MessageBox(hwnd,
553 "PuTTYgen will not generate a key"
554 " smaller than 256 bits.\n"
555 "Key length reset to 256. Continue?",
556 "PuTTYgen Warning",
557 MB_ICONWARNING | MB_OKCANCEL);
558 if (ret != IDOK)
559 break;
560 state->keysize = 256;
561 SetDlgItemInt(hwnd, IDC_BITS, 256, FALSE);
562 }
6e522441 563 hidemany(hwnd, nokey_ids, TRUE);
564 hidemany(hwnd, generating_ids, FALSE);
565 hidemany(hwnd, gotkey_ids, TRUE);
566 EnableWindow(GetDlgItem(hwnd, IDC_GENERATE), 0);
567 EnableWindow(GetDlgItem(hwnd, IDC_LOAD), 0);
568 EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 0);
569 state->key_exists = FALSE;
570 SetDlgItemText(hwnd, IDC_GENERATING, entropy_msg);
571 state->collecting_entropy = TRUE;
572
573 /*
574 * My brief statistical tests on mouse movements
47c98e43 575 * suggest that there are about 2.5 bits of
576 * randomness in the x position, 2.5 in the y
6e522441 577 * position, and 1.7 in the message time, making
47c98e43 578 * 5.7 bits of unpredictability per mouse movement.
579 * However, other people have told me it's far less
580 * than that, so I'm going to be stupidly cautious
581 * and knock that down to a nice round 2. With this
582 * method, we require two words per mouse movement,
583 * so with 2 bits per mouse movement we expect 2
584 * bits every 2 words.
6e522441 585 */
47c98e43 586 state->entropy_required = (state->keysize/2) * 2;
6e522441 587 state->entropy_got = 0;
588 state->entropy_size = (state->entropy_required *
589 sizeof(*state->entropy));
dcbde236 590 state->entropy = smalloc(state->entropy_size);
6e522441 591
592 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETRANGE, 0,
593 MAKELPARAM(0, state->entropy_required));
594 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS, 0, 0);
595 }
596 break;
597 case IDC_SAVE:
598 state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
599 if (state->key_exists) {
600 char filename[FILENAME_MAX];
601 char passphrase[PASSPHRASE_MAXLEN];
a5470c60 602 char passphrase2[PASSPHRASE_MAXLEN];
603 GetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT,
604 passphrase, sizeof(passphrase));
605 GetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT,
606 passphrase2, sizeof(passphrase2));
607 if (strcmp(passphrase, passphrase2)) {
608 MessageBox(hwnd,
609 "The two passphrases given do not match.",
610 "PuTTYgen Error",
611 MB_OK | MB_ICONERROR);
612 break;
613 }
6e522441 614 if (!*passphrase) {
615 int ret;
616 ret = MessageBox(hwnd,
617 "Are you sure you want to save this key\n"
618 "without a passphrase to protect it?",
619 "PuTTYgen Warning",
620 MB_YESNO | MB_ICONWARNING);
621 if (ret != IDYES)
622 break;
623 }
624 if (prompt_keyfile(hwnd, "Save private key as:",
625 filename, 1)) {
bdea0743 626 int ret;
18790478 627 FILE *fp = fopen(filename, "r");
628 if (fp) {
18790478 629 char buffer[FILENAME_MAX+80];
630 fclose(fp);
631 sprintf(buffer, "Overwrite existing file\n%.*s?",
632 FILENAME_MAX, filename);
633 ret = MessageBox(hwnd, buffer, "PuTTYgen Warning",
634 MB_YESNO | MB_ICONWARNING);
635 if (ret != IDYES)
636 break;
637 }
65a22376 638 if (state->ssh2) {
639 ret = ssh2_save_userkey(filename, &state->ssh2key,
640 *passphrase ? passphrase : NULL);
641 } else {
642 ret = saversakey(filename, &state->key,
643 *passphrase ? passphrase : NULL);
644 }
bdea0743 645 if (ret <= 0) {
646 MessageBox(hwnd, "Unable to save key file",
647 "PuTTYgen Error",
648 MB_OK | MB_ICONERROR);
649 }
6e522441 650 }
651 }
652 break;
653 case IDC_LOAD:
654 state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
655 if (!state->generation_thread_exists) {
656 char filename[FILENAME_MAX];
657 if (prompt_keyfile(hwnd, "Load private key:",
658 filename, 0)) {
659 char passphrase[PASSPHRASE_MAXLEN];
660 int needs_pass;
65a22376 661 int ver;
6e522441 662 int ret;
663 char *comment;
664 struct PassphraseProcStruct pps;
65a22376 665 struct RSAKey newkey1;
666 struct ssh2_userkey *newkey2;
667
668 ver = keyfile_version(filename);
669 if (ver == 0) {
670 MessageBox(NULL, "Couldn't load private key.",
671 "PuTTYgen Error", MB_OK | MB_ICONERROR);
672 break;
673 }
6e522441 674
65a22376 675 comment = NULL;
676 if (ver == 1)
677 needs_pass = rsakey_encrypted(filename, &comment);
678 else
679 needs_pass = ssh2_userkey_encrypted(filename, &comment);
6e522441 680 pps.passphrase = passphrase;
681 pps.comment = comment;
682 do {
683 if (needs_pass) {
684 int dlgret;
685 dlgret = DialogBoxParam(hinst,
686 MAKEINTRESOURCE(210),
687 NULL, PassphraseProc,
688 (LPARAM)&pps);
689 if (!dlgret) {
690 ret = -2;
691 break;
692 }
693 } else
694 *passphrase = '\0';
65a22376 695 if (ver == 1)
696 ret = loadrsakey(filename, &newkey1, passphrase);
697 else {
698 newkey2 = ssh2_load_userkey(filename, passphrase);
699 if (newkey2 == SSH2_WRONG_PASSPHRASE)
700 ret = -1;
701 else if (!newkey2)
702 ret = 0;
703 else
704 ret = 1;
705 }
6e522441 706 } while (ret == -1);
dcbde236 707 if (comment) sfree(comment);
6e522441 708 if (ret == 0) {
709 MessageBox(NULL, "Couldn't load private key.",
710 "PuTTYgen Error", MB_OK | MB_ICONERROR);
711 } else if (ret == 1) {
6e522441 712 EnableWindow(GetDlgItem(hwnd, IDC_GENERATE), 1);
713 EnableWindow(GetDlgItem(hwnd, IDC_LOAD), 1);
714 EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 1);
715 /*
716 * Now update the key controls with all the
717 * key data.
718 */
719 {
a5470c60 720 SetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT,
721 passphrase);
722 SetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT,
6e522441 723 passphrase);
65a22376 724 if (ver == 1) {
725 char buf[128];
726 char *savecomment;
727
728 state->ssh2 = FALSE;
729 state->commentptr = &state->key.comment;
730 state->key = newkey1;
731
732 /*
733 * Set the key fingerprint.
734 */
735 savecomment = state->key.comment;
6e522441 736 state->key.comment = NULL;
737 rsa_fingerprint(buf, sizeof(buf), &state->key);
738 state->key.comment = savecomment;
65a22376 739
740 SetDlgItemText(hwnd, IDC_FINGERPRINT, buf);
741 /*
742 * Construct a decimal representation
743 * of the key, for pasting into
744 * .ssh/authorized_keys on a Unix box.
745 */
746 setupbigedit1(hwnd, IDC_KEYDISPLAY, &state->key);
747 } else {
748 char *fp;
749 char *savecomment;
750
751 state->ssh2 = TRUE;
752 state->commentptr = &state->ssh2key.comment;
753 state->ssh2key = *newkey2; /* structure copy */
754 sfree(newkey2);
755
756 savecomment = state->ssh2key.comment;
757 state->ssh2key.comment = NULL;
758 fp = state->
759 ssh2key.alg->fingerprint(state->ssh2key.data);
760 state->ssh2key.comment = savecomment;
761
762 SetDlgItemText(hwnd, IDC_FINGERPRINT, fp);
763 sfree(fp);
764
765 setupbigedit2(hwnd, IDC_KEYDISPLAY, &state->ssh2key);
766 }
767 SetDlgItemText(hwnd, IDC_COMMENTEDIT,
768 *state->commentptr);
6e522441 769 }
770 /*
771 * Finally, hide the progress bar and show
772 * the key data.
773 */
774 hidemany(hwnd, nokey_ids, TRUE);
775 hidemany(hwnd, generating_ids, TRUE);
776 hidemany(hwnd, gotkey_ids, FALSE);
777 state->key_exists = TRUE;
778 }
779 }
780 }
781 break;
782 }
783 return 0;
784 case WM_DONEKEY:
785 state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
786 state->generation_thread_exists = FALSE;
787 state->key_exists = TRUE;
788 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS, PROGRESSRANGE, 0);
789 EnableWindow(GetDlgItem(hwnd, IDC_GENERATE), 1);
790 EnableWindow(GetDlgItem(hwnd, IDC_LOAD), 1);
791 EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 1);
3b4c5899 792 if (state->ssh2) {
793 state->ssh2key.data = &state->key;
794 state->ssh2key.alg = &ssh_rsa;
65a22376 795 state->commentptr = &state->ssh2key.comment;
3b4c5899 796 } else {
65a22376 797 state->commentptr = &state->key.comment;
3b4c5899 798 }
6e522441 799 /*
800 * Invent a comment for the key. We'll do this by including
801 * the date in it. This will be so horrifyingly ugly that
802 * the user will immediately want to change it, which is
803 * what we want :-)
804 */
65a22376 805 *state->commentptr = smalloc(30);
6e522441 806 {
807 time_t t;
808 struct tm *tm;
809 time(&t);
810 tm = localtime(&t);
65a22376 811 strftime(*state->commentptr, 30, "rsa-key-%Y%m%d", tm);
6e522441 812 }
813
814 /*
815 * Now update the key controls with all the key data.
816 */
817 {
65a22376 818 char *savecomment;
6e522441 819 /*
820 * Blank passphrase, initially. This isn't dangerous,
821 * because we will warn (Are You Sure?) before allowing
822 * the user to save an unprotected private key.
823 */
a5470c60 824 SetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT, "");
825 SetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT, "");
6e522441 826 /*
827 * Set the comment.
828 */
65a22376 829 SetDlgItemText(hwnd, IDC_COMMENTEDIT, *state->commentptr);
6e522441 830 /*
831 * Set the key fingerprint.
832 */
65a22376 833 savecomment = *state->commentptr;
834 *state->commentptr = NULL;
835 if (state->ssh2) {
836 char *fp;
837 fp = state->ssh2key.alg->fingerprint(state->ssh2key.data);
838 SetDlgItemText(hwnd, IDC_FINGERPRINT, fp);
839 sfree(fp);
840 } else {
841 char buf[128];
6e522441 842 rsa_fingerprint(buf, sizeof(buf), &state->key);
65a22376 843 SetDlgItemText(hwnd, IDC_FINGERPRINT, buf);
6e522441 844 }
65a22376 845 *state->commentptr = savecomment;
6e522441 846 /*
847 * Construct a decimal representation of the key, for
848 * pasting into .ssh/authorized_keys on a Unix box.
849 */
65a22376 850 if (state->ssh2) {
851 setupbigedit2(hwnd, IDC_KEYDISPLAY, &state->ssh2key);
852 } else {
853 setupbigedit1(hwnd, IDC_KEYDISPLAY, &state->key);
854 }
6e522441 855 }
856 /*
857 * Finally, hide the progress bar and show the key data.
858 */
859 hidemany(hwnd, nokey_ids, TRUE);
860 hidemany(hwnd, generating_ids, TRUE);
861 hidemany(hwnd, gotkey_ids, FALSE);
862 break;
863 case WM_CLOSE:
864 state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
dcbde236 865 sfree(state);
6e522441 866 EndDialog(hwnd, 1);
867 return 0;
868 }
869 return 0;
870}
871
872int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show) {
8b8cf871 873 InitCommonControls();
6e522441 874 hinst = inst;
875 random_init();
876 return DialogBox(hinst, MAKEINTRESOURCE(201), NULL, MainDlgProc) != IDOK;
877}
Simon Tatham's PuTTY GUI SSH client; import of svn://svn.tartarus.org/sgt/putty