puttygen.c

   1 /*
   2  * PuTTY key generation front end.
   3  */
   4
   5 #include <windows.h>
   6 #include <commctrl.h>
   7 #include <time.h>
   8 #include <stdio.h>
   9
  10 #define PUTTY_DO_GLOBALS
  11
  12 #include "putty.h"
  13 #include "ssh.h"
  14 #include "winstuff.h"
  15
  16 #define WM_DONEKEY (WM_XUSER + 1)
  17
  18 #define DEFAULT_KEYSIZE 1024
  19
  20 /* ----------------------------------------------------------------------
  21  * Progress report code. This is really horrible :-)
  22  */
  23 #define PHASE1TOTAL 0x10000
  24 #define PHASE2TOTAL 0x10000
  25 #define PHASE3TOTAL 0x04000
  26 #define PHASE1START 0
  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)
  33 struct progress {
  34     unsigned phase1param, phase1current, phase1n;
  35     unsigned phase2param, phase2current, phase2n;
  36     unsigned phase3mult;
  37     HWND progbar;
  38 };
  39
  40 static void progress_update(void *param, int phase, int iprogress) {
  41     struct progress *p = (struct progress *)param;
  42     unsigned progress = iprogress;
  43     int position;
  44
  45     switch (phase) {
  46       case -1:
  47         p->phase1param = 0x10000 + progress;
  48         p->phase1current = 0x10000; p->phase1n = 0;
  49         return;
  50       case -2:
  51         p->phase2param = 0x10000 + progress;
  52         p->phase2current = 0x10000; p->phase2n = 0;
  53         return;
  54       case -3:
  55         p->phase3mult = PHASE3TOTAL / progress;
  56         return;
  57       case 1:
  58         while (p->phase1n < progress) {
  59             p->phase1n++;
  60             p->phase1current *= p->phase1param;
  61             p->phase1current /= 0x10000;
  62         }
  63         position = PHASE1START + 0x10000 - p->phase1current;
  64         break;
  65       case 2:
  66         while (p->phase2n < progress) {
  67             p->phase2n++;
  68             p->phase2current *= p->phase2param;
  69             p->phase2current /= 0x10000;
  70         }
  71         position = PHASE2START + 0x10000 - p->phase2current;
  72         break;
  73       case 3:
  74         position = PHASE3START + progress * p->phase3mult;
  75         break;
  76     }
  77
  78     SendMessage(p->progbar, PBM_SETPOS, position / DIVISOR, 0);
  79 }
  80
  81 extern char ver[];
  82
  83 #define PASSPHRASE_MAXLEN 512
  84
  85 struct PassphraseProcStruct {
  86     char *passphrase;
  87     char *comment;
  88 };
  89
  90 /*
  91  * Dialog-box function for the passphrase box.
  92  */
  93 static int CALLBACK PassphraseProc(HWND hwnd, UINT msg,
  94                                    WPARAM wParam, LPARAM lParam) {
  95     static char *passphrase;
  96     struct PassphraseProcStruct *p;
  97
  98     switch (msg) {
  99       case WM_INITDIALOG:
 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;
 105         if (p->comment)
 106             SetDlgItemText(hwnd, 101, p->comment);
 107         *passphrase = 0;
 108         return 0;
 109       case WM_COMMAND:
 110         switch (LOWORD(wParam)) {
 111           case IDOK:
 112             if (*passphrase)
 113                 EndDialog (hwnd, 1);
 114             else
 115                 MessageBeep (0);
 116             return 0;
 117           case IDCANCEL:
 118             EndDialog (hwnd, 0);
 119             return 0;
 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';
 124             }
 125             return 0;
 126         }
 127         return 0;
 128       case WM_CLOSE:
 129         EndDialog (hwnd, 0);
 130         return 0;
 131     }
 132     return 0;
 133 }
 134
 135 /*
 136  * Prompt for a key file. Assumes the filename buffer is of size
 137  * FILENAME_MAX.
 138  */
 139 static int prompt_keyfile(HWND hwnd, char *dlgtitle,
 140                           char *filename, int save) {
 141     OPENFILENAME of;
 142     memset(&of, 0, sizeof(of));
 143 #ifdef OPENFILENAME_SIZE_VERSION_400
 144     of.lStructSize = OPENFILENAME_SIZE_VERSION_400;
 145 #else
 146     of.lStructSize = sizeof(of);
 147 #endif
 148     of.hwndOwner = hwnd;
 149     of.lpstrFilter = "All Files\0*\0\0\0";
 150     of.lpstrCustomFilter = NULL;
 151     of.nFilterIndex = 1;
 152     of.lpstrFile = filename; *filename = '\0';
 153     of.nMaxFile = FILENAME_MAX;
 154     of.lpstrFileTitle = NULL;
 155     of.lpstrInitialDir = NULL;
 156     of.lpstrTitle = dlgtitle;
 157     of.Flags = 0;
 158     if (save)
 159         return GetSaveFileName(&of);
 160     else
 161         return GetOpenFileName(&of);
 162 }
 163
 164 /*
 165  * This function is needed to link with the DES code. We need not
 166  * have it do anything at all.
 167  */
 168 void logevent(char *msg) {
 169 }
 170
 171 /*
 172  * Dialog-box function for the Licence box.
 173  */
 174 static int CALLBACK LicenceProc (HWND hwnd, UINT msg,
 175                                  WPARAM wParam, LPARAM lParam) {
 176     switch (msg) {
 177       case WM_INITDIALOG:
 178         return 1;
 179       case WM_COMMAND:
 180         switch (LOWORD(wParam)) {
 181           case IDOK:
 182             EndDialog(hwnd, 1);
 183             return 0;
 184         }
 185         return 0;
 186       case WM_CLOSE:
 187         EndDialog(hwnd, 1);
 188         return 0;
 189     }
 190     return 0;
 191 }
 192
 193 /*
 194  * Dialog-box function for the About box.
 195  */
 196 static int CALLBACK AboutProc (HWND hwnd, UINT msg,
 197                                WPARAM wParam, LPARAM lParam) {
 198     switch (msg) {
 199       case WM_INITDIALOG:
 200         SetDlgItemText (hwnd, 100, ver);
 201         return 1;
 202       case WM_COMMAND:
 203         switch (LOWORD(wParam)) {
 204           case IDOK:
 205             EndDialog(hwnd, 1);
 206             return 0;
 207           case 101:
 208             EnableWindow(hwnd, 0);
 209             DialogBox (hinst, MAKEINTRESOURCE(214), NULL, LicenceProc);
 210             EnableWindow(hwnd, 1);
 211             SetActiveWindow(hwnd);
 212             return 0;
 213         }
 214         return 0;
 215       case WM_CLOSE:
 216         EndDialog(hwnd, 1);
 217         return 0;
 218     }
 219     return 0;
 220 }
 221
 222 /*
 223  * Thread to generate a key.
 224  */
 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 */
 229     struct RSAKey *key;
 230     struct RSAAux *aux;
 231 };
 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;
 237
 238     rsa_generate(params->key, params->aux,
 239                  params->keysize, progress_update, &prog);
 240
 241     PostMessage(params->dialog, WM_DONEKEY, 0, 0);
 242
 243     free(params);
 244     return 0;
 245 }
 246
 247 struct MainDlgState {
 248     int collecting_entropy;
 249     int generation_thread_exists;
 250     int key_exists;
 251     int entropy_got, entropy_required, entropy_size;
 252     int keysize;
 253     unsigned *entropy;
 254     struct RSAKey key;
 255     struct RSAAux aux;
 256 };
 257
 258 static void hidemany(HWND hwnd, const int *ids, int hideit) {
 259     while (*ids) {
 260         ShowWindow(GetDlgItem(hwnd, *ids++), (hideit ? SW_HIDE : SW_SHOW));
 261     }
 262 }
 263
 264 static void setupbigedit(HWND hwnd, int id, struct RSAKey *key) {
 265     char *buffer;
 266     char *dec1, *dec2;
 267
 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);
 276     free(dec1);
 277     free(dec2);
 278     free(buffer);
 279 }
 280
 281 /*
 282  * Dialog-box function for the main PuTTYgen dialog box.
 283  */
 284 static int CALLBACK MainDlgProc (HWND hwnd, UINT msg,
 285                                  WPARAM wParam, LPARAM lParam) {
 286     enum {
 287         controlidstart = 100,
 288         IDC_TITLE,
 289         IDC_BOX_KEY, IDC_BOXT_KEY,
 290         IDC_NOKEY,
 291         IDC_GENERATING,
 292         IDC_PROGRESS,
 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,
 304         IDC_ABOUT,
 305     };
 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;
 319
 320     switch (msg) {
 321       case WM_INITDIALOG:
 322         state = malloc(sizeof(*state));
 323         state->generation_thread_exists = FALSE;
 324         state->key_exists = FALSE;
 325         SetWindowLong(hwnd, GWL_USERDATA, (LONG)state);
 326         {
 327             struct ctlpos cp, cp2;
 328
 329             /* Accelerators used: acglops */
 330
 331             ctlposinit(&cp, hwnd, 10, 10, 10);
 332             bartitle(&cp, "Public and private key generation for PuTTY",
 333                     IDC_TITLE);
 334             beginbox(&cp, "Key",
 335                      IDC_BOX_KEY, IDC_BOXT_KEY);
 336             cp2 = cp;
 337             statictext(&cp2, "No key.", IDC_NOKEY);
 338             cp2 = cp;
 339             statictext(&cp2, "",
 340                        IDC_GENERATING);
 341             progressbar(&cp2, IDC_PROGRESS);
 342             bigeditctrl(&cp,
 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);
 355             endbox(&cp);
 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);
 364             endbox(&cp);
 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);
 369             endbox(&cp);
 370         }
 371         SetDlgItemInt(hwnd, IDC_BITS, DEFAULT_KEYSIZE, FALSE);
 372
 373         /*
 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
 377          * anything.
 378          */
 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);
 383
 384         return 1;
 385       case WM_MOUSEMOVE:
 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;
 394                 DWORD threadid;
 395
 396                 /*
 397                  * Seed the entropy pool
 398                  */
 399                 random_add_heavynoise(state->entropy, state->entropy_size);
 400                 memset(state->entropy, 0, state->entropy_size);
 401                 free(state->entropy);
 402
 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);
 407
 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;
 414
 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);
 420                     free(params);
 421                 } else {
 422                     state->generation_thread_exists = TRUE;
 423                     state->collecting_entropy = FALSE;
 424                 }
 425             }
 426         }
 427         break;
 428       case WM_COMMAND:
 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);
 441                 }
 442             }
 443             break;
 444           case IDC_ABOUT:
 445             EnableWindow(hwnd, 0);
 446             DialogBox (hinst, MAKEINTRESOURCE(213), NULL, AboutProc);
 447             EnableWindow(hwnd, 1);
 448             SetActiveWindow(hwnd);
 449             return 0;
 450           case IDC_GENERATE:
 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;
 462                 {
 463                     BOOL ok;
 464                     state->keysize = GetDlgItemInt(hwnd, IDC_BITS,
 465                                                    &ok, FALSE);
 466                     if (!ok) state->keysize = DEFAULT_KEYSIZE;
 467                 }
 468
 469                 /*
 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.
 481                  */
 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);
 487
 488                 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETRANGE, 0,
 489                                    MAKELPARAM(0, state->entropy_required));
 490                 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS, 0, 0);
 491             }
 492             break;
 493           case IDC_SAVE:
 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)) {
 504                     MessageBox(hwnd,
 505                                "The two passphrases given do not match.",
 506                                "PuTTYgen Error",
 507                                MB_OK | MB_ICONERROR);
 508                     break;
 509                 }
 510                 if (!*passphrase) {
 511                     int ret;
 512                     ret = MessageBox(hwnd,
 513                                      "Are you sure you want to save this key\n"
 514                                      "without a passphrase to protect it?",
 515                                      "PuTTYgen Warning",
 516                                      MB_YESNO | MB_ICONWARNING);
 517                     if (ret != IDYES)
 518                         break;
 519                 }
 520                 if (prompt_keyfile(hwnd, "Save private key as:",
 521                                    filename, 1)) {
 522                     int ret;
 523                     FILE *fp = fopen(filename, "r");
 524                     if (fp) {
 525                         char buffer[FILENAME_MAX+80];
 526                         fclose(fp);
 527                         sprintf(buffer, "Overwrite existing file\n%.*s?",
 528                                 FILENAME_MAX, filename);
 529                         ret = MessageBox(hwnd, buffer, "PuTTYgen Warning",
 530                                          MB_YESNO | MB_ICONWARNING);
 531                         if (ret != IDYES)
 532                             break;
 533                     }
 534                     ret = saversakey(filename, &state->key, &state->aux,
 535                                      *passphrase ? passphrase : NULL);
 536                     if (ret <= 0) {
 537                         MessageBox(hwnd, "Unable to save key file",
 538                                    "PuTTYgen Error",
 539                                    MB_OK | MB_ICONERROR);
 540                     }
 541                 }
 542             }
 543             break;
 544           case IDC_LOAD:
 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:",
 549                                    filename, 0)) {
 550                     char passphrase[PASSPHRASE_MAXLEN];
 551                     int needs_pass;
 552                     int ret;
 553                     char *comment;
 554                     struct PassphraseProcStruct pps;
 555                     struct RSAKey newkey;
 556                     struct RSAAux newaux;
 557
 558                     needs_pass = rsakey_encrypted(filename, &comment);
 559                     pps.passphrase = passphrase;
 560                     pps.comment = comment;
 561                     do {
 562                         if (needs_pass) {
 563                             int dlgret;
 564                             dlgret = DialogBoxParam(hinst,
 565                                                     MAKEINTRESOURCE(210),
 566                                                     NULL, PassphraseProc,
 567                                                     (LPARAM)&pps);
 568                             if (!dlgret) {
 569                                 ret = -2;
 570                                 break;
 571                             }
 572                         } else
 573                             *passphrase = '\0';
 574                         ret = loadrsakey(filename, &newkey, &newaux,
 575                                          passphrase);
 576                     } while (ret == -1);
 577                     if (comment) free(comment);
 578                     if (ret == 0) {
 579                         MessageBox(NULL, "Couldn't load private key.",
 580                                    "PuTTYgen Error", MB_OK | MB_ICONERROR);
 581                     } else if (ret == 1) {
 582                         state->key = newkey;
 583                         state->aux = newaux;
 584
 585                         EnableWindow(GetDlgItem(hwnd, IDC_GENERATE), 1);
 586                         EnableWindow(GetDlgItem(hwnd, IDC_LOAD), 1);
 587                         EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 1);
 588                         /*
 589                          * Now update the key controls with all the
 590                          * key data.
 591                          */
 592                         {
 593                             char buf[128];
 594                             SetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT,
 595                                            passphrase);
 596                             SetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT,
 597                                            passphrase);
 598                             SetDlgItemText(hwnd, IDC_COMMENTEDIT,
 599                                            state->key.comment);
 600                             /*
 601                              * Set the key fingerprint.
 602                              */
 603                             {
 604                                 char *savecomment = state->key.comment;
 605                                 state->key.comment = NULL;
 606                                 rsa_fingerprint(buf, sizeof(buf), &state->key);
 607                                 state->key.comment = savecomment;
 608                             }
 609                             SetDlgItemText(hwnd, IDC_FINGERPRINT, buf);
 610                             /*
 611                              * Construct a decimal representation
 612                              * of the key, for pasting into
 613                              * .ssh/authorized_keys on a Unix box.
 614                              */
 615                             setupbigedit(hwnd, IDC_KEYDISPLAY, &state->key);
 616                         }
 617                         /*
 618                          * Finally, hide the progress bar and show
 619                          * the key data.
 620                          */
 621                         hidemany(hwnd, nokey_ids, TRUE);
 622                         hidemany(hwnd, generating_ids, TRUE);
 623                         hidemany(hwnd, gotkey_ids, FALSE);
 624                         state->key_exists = TRUE;
 625                     }
 626                 }
 627             }
 628             break;
 629         }
 630         return 0;
 631       case WM_DONEKEY:
 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);
 639         /*
 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
 643          * what we want :-)
 644          */
 645         state->key.comment = malloc(30);
 646         {
 647             time_t t;
 648             struct tm *tm;
 649             time(&t);
 650             tm = localtime(&t);
 651             strftime(state->key.comment, 30, "rsa-key-%Y%m%d", tm);
 652         }
 653
 654         /*
 655          * Now update the key controls with all the key data.
 656          */
 657         {
 658             char buf[128];
 659             /*
 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.
 663              */
 664             SetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT, "");
 665             SetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT, "");
 666             /*
 667              * Set the comment.
 668              */
 669             SetDlgItemText(hwnd, IDC_COMMENTEDIT, state->key.comment);
 670             /*
 671              * Set the key fingerprint.
 672              */
 673             {
 674                 char *savecomment = state->key.comment;
 675                 state->key.comment = NULL;
 676                 rsa_fingerprint(buf, sizeof(buf), &state->key);
 677                 state->key.comment = savecomment;
 678             }
 679             SetDlgItemText(hwnd, IDC_FINGERPRINT, buf);
 680             /*
 681              * Construct a decimal representation of the key, for
 682              * pasting into .ssh/authorized_keys on a Unix box.
 683              */
 684             setupbigedit(hwnd, IDC_KEYDISPLAY, &state->key);
 685         }
 686         /*
 687          * Finally, hide the progress bar and show the key data.
 688          */
 689         hidemany(hwnd, nokey_ids, TRUE);
 690         hidemany(hwnd, generating_ids, TRUE);
 691         hidemany(hwnd, gotkey_ids, FALSE);
 692         break;
 693       case WM_CLOSE:
 694         state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
 695         free(state);
 696         EndDialog(hwnd, 1);
 697         return 0;
 698     }
 699     return 0;
 700 }
 701
 702 int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show) {
 703     InitCommonControls();
 704     hinst = inst;
 705     random_init();
 706     return DialogBox(hinst, MAKEINTRESOURCE(201), NULL, MainDlgProc) != IDOK;
 707 }