windows/winpgen.c

   1 /*
   2  * PuTTY key generation front end (Windows).
   3  */
   4
   5 #include <time.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8
   9 #define PUTTY_DO_GLOBALS
  10
  11 #include "putty.h"
  12 #include "ssh.h"
  13
  14 #include <commctrl.h>
  15
  16 #ifdef MSVC4
  17 #define ICON_BIG        1
  18 #endif
  19
  20 #define WM_DONEKEY (WM_XUSER + 1)
  21
  22 #define DEFAULT_KEYSIZE 1024
  23
  24 static char *cmdline_keyfile = NULL;
  25
  26 /*
  27  * Print a modal (Really Bad) message box and perform a fatal exit.
  28  */
  29 void modalfatalbox(char *fmt, ...)
  30 {
  31     va_list ap;
  32     char *stuff;
  33
  34     va_start(ap, fmt);
  35     stuff = dupvprintf(fmt, ap);
  36     va_end(ap);
  37     MessageBox(NULL, stuff, "PuTTYgen Fatal Error",
  38                MB_SYSTEMMODAL | MB_ICONERROR | MB_OK);
  39     sfree(stuff);
  40     exit(1);
  41 }
  42
  43 /* ----------------------------------------------------------------------
  44  * Progress report code. This is really horrible :-)
  45  */
  46 #define PROGRESSRANGE 65535
  47 #define MAXPHASE 5
  48 struct progress {
  49     int nphases;
  50     struct {
  51         int exponential;
  52         unsigned startpoint, total;
  53         unsigned param, current, n;    /* if exponential */
  54         unsigned mult;                 /* if linear */
  55     } phases[MAXPHASE];
  56     unsigned total, divisor, range;
  57     HWND progbar;
  58 };
  59
  60 static void progress_update(void *param, int action, int phase, int iprogress)
  61 {
  62     struct progress *p = (struct progress *) param;
  63     unsigned progress = iprogress;
  64     int position;
  65
  66     if (action < PROGFN_READY && p->nphases < phase)
  67         p->nphases = phase;
  68     switch (action) {
  69       case PROGFN_INITIALISE:
  70         p->nphases = 0;
  71         break;
  72       case PROGFN_LIN_PHASE:
  73         p->phases[phase-1].exponential = 0;
  74         p->phases[phase-1].mult = p->phases[phase].total / progress;
  75         break;
  76       case PROGFN_EXP_PHASE:
  77         p->phases[phase-1].exponential = 1;
  78         p->phases[phase-1].param = 0x10000 + progress;
  79         p->phases[phase-1].current = p->phases[phase-1].total;
  80         p->phases[phase-1].n = 0;
  81         break;
  82       case PROGFN_PHASE_EXTENT:
  83         p->phases[phase-1].total = progress;
  84         break;
  85       case PROGFN_READY:
  86         {
  87             unsigned total = 0;
  88             int i;
  89             for (i = 0; i < p->nphases; i++) {
  90                 p->phases[i].startpoint = total;
  91                 total += p->phases[i].total;
  92             }
  93             p->total = total;
  94             p->divisor = ((p->total + PROGRESSRANGE - 1) / PROGRESSRANGE);
  95             p->range = p->total / p->divisor;
  96             SendMessage(p->progbar, PBM_SETRANGE, 0, MAKELPARAM(0, p->range));
  97         }
  98         break;
  99       case PROGFN_PROGRESS:
 100         if (p->phases[phase-1].exponential) {
 101             while (p->phases[phase-1].n < progress) {
 102                 p->phases[phase-1].n++;
 103                 p->phases[phase-1].current *= p->phases[phase-1].param;
 104                 p->phases[phase-1].current /= 0x10000;
 105             }
 106             position = (p->phases[phase-1].startpoint +
 107                         p->phases[phase-1].total - p->phases[phase-1].current);
 108         } else {
 109             position = (p->phases[phase-1].startpoint +
 110                         progress * p->phases[phase-1].mult);
 111         }
 112         SendMessage(p->progbar, PBM_SETPOS, position / p->divisor, 0);
 113         break;
 114     }
 115 }
 116
 117 extern char ver[];
 118
 119 #define PASSPHRASE_MAXLEN 512
 120
 121 struct PassphraseProcStruct {
 122     char *passphrase;
 123     char *comment;
 124 };
 125
 126 /*
 127  * Dialog-box function for the passphrase box.
 128  */
 129 static int CALLBACK PassphraseProc(HWND hwnd, UINT msg,
 130                                    WPARAM wParam, LPARAM lParam)
 131 {
 132     static char *passphrase = NULL;
 133     struct PassphraseProcStruct *p;
 134
 135     switch (msg) {
 136       case WM_INITDIALOG:
 137         SetForegroundWindow(hwnd);
 138         SetWindowPos(hwnd, HWND_TOP, 0, 0, 0, 0,
 139                      SWP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW);
 140
 141         /*
 142          * Centre the window.
 143          */
 144         {                              /* centre the window */
 145             RECT rs, rd;
 146             HWND hw;
 147
 148             hw = GetDesktopWindow();
 149             if (GetWindowRect(hw, &rs) && GetWindowRect(hwnd, &rd))
 150                 MoveWindow(hwnd,
 151                            (rs.right + rs.left + rd.left - rd.right) / 2,
 152                            (rs.bottom + rs.top + rd.top - rd.bottom) / 2,
 153                            rd.right - rd.left, rd.bottom - rd.top, TRUE);
 154         }
 155
 156         p = (struct PassphraseProcStruct *) lParam;
 157         passphrase = p->passphrase;
 158         if (p->comment)
 159             SetDlgItemText(hwnd, 101, p->comment);
 160         *passphrase = 0;
 161         SetDlgItemText(hwnd, 102, passphrase);
 162         return 0;
 163       case WM_COMMAND:
 164         switch (LOWORD(wParam)) {
 165           case IDOK:
 166             if (*passphrase)
 167                 EndDialog(hwnd, 1);
 168             else
 169                 MessageBeep(0);
 170             return 0;
 171           case IDCANCEL:
 172             EndDialog(hwnd, 0);
 173             return 0;
 174           case 102:                    /* edit box */
 175             if ((HIWORD(wParam) == EN_CHANGE) && passphrase) {
 176                 GetDlgItemText(hwnd, 102, passphrase,
 177                                PASSPHRASE_MAXLEN - 1);
 178                 passphrase[PASSPHRASE_MAXLEN - 1] = '\0';
 179             }
 180             return 0;
 181         }
 182         return 0;
 183       case WM_CLOSE:
 184         EndDialog(hwnd, 0);
 185         return 0;
 186     }
 187     return 0;
 188 }
 189
 190 /*
 191  * Prompt for a key file. Assumes the filename buffer is of size
 192  * FILENAME_MAX.
 193  */
 194 static int prompt_keyfile(HWND hwnd, char *dlgtitle,
 195                           char *filename, int save, int ppk)
 196 {
 197     OPENFILENAME of;
 198     memset(&of, 0, sizeof(of));
 199     of.hwndOwner = hwnd;
 200     if (ppk) {
 201         of.lpstrFilter = "PuTTY Private Key Files (*.ppk)\0*.ppk\0"
 202             "All Files (*.*)\0*\0\0\0";
 203         of.lpstrDefExt = ".ppk";
 204     } else {
 205         of.lpstrFilter = "All Files (*.*)\0*\0\0\0";
 206     }
 207     of.lpstrCustomFilter = NULL;
 208     of.nFilterIndex = 1;
 209     of.lpstrFile = filename;
 210     *filename = '\0';
 211     of.nMaxFile = FILENAME_MAX;
 212     of.lpstrFileTitle = NULL;
 213     of.lpstrTitle = dlgtitle;
 214     of.Flags = 0;
 215     return request_file(NULL, &of, FALSE, save);
 216 }
 217
 218 /*
 219  * Dialog-box function for the Licence box.
 220  */
 221 static int CALLBACK LicenceProc(HWND hwnd, UINT msg,
 222                                 WPARAM wParam, LPARAM lParam)
 223 {
 224     switch (msg) {
 225       case WM_INITDIALOG:
 226         /*
 227          * Centre the window.
 228          */
 229         {                              /* centre the window */
 230             RECT rs, rd;
 231             HWND hw;
 232
 233             hw = GetDesktopWindow();
 234             if (GetWindowRect(hw, &rs) && GetWindowRect(hwnd, &rd))
 235                 MoveWindow(hwnd,
 236                            (rs.right + rs.left + rd.left - rd.right) / 2,
 237                            (rs.bottom + rs.top + rd.top - rd.bottom) / 2,
 238                            rd.right - rd.left, rd.bottom - rd.top, TRUE);
 239         }
 240
 241         return 1;
 242       case WM_COMMAND:
 243         switch (LOWORD(wParam)) {
 244           case IDOK:
 245           case IDCANCEL:
 246             EndDialog(hwnd, 1);
 247             return 0;
 248         }
 249         return 0;
 250       case WM_CLOSE:
 251         EndDialog(hwnd, 1);
 252         return 0;
 253     }
 254     return 0;
 255 }
 256
 257 /*
 258  * Dialog-box function for the About box.
 259  */
 260 static int CALLBACK AboutProc(HWND hwnd, UINT msg,
 261                               WPARAM wParam, LPARAM lParam)
 262 {
 263     switch (msg) {
 264       case WM_INITDIALOG:
 265         /*
 266          * Centre the window.
 267          */
 268         {                              /* centre the window */
 269             RECT rs, rd;
 270             HWND hw;
 271
 272             hw = GetDesktopWindow();
 273             if (GetWindowRect(hw, &rs) && GetWindowRect(hwnd, &rd))
 274                 MoveWindow(hwnd,
 275                            (rs.right + rs.left + rd.left - rd.right) / 2,
 276                            (rs.bottom + rs.top + rd.top - rd.bottom) / 2,
 277                            rd.right - rd.left, rd.bottom - rd.top, TRUE);
 278         }
 279
 280         SetDlgItemText(hwnd, 100, ver);
 281         return 1;
 282       case WM_COMMAND:
 283         switch (LOWORD(wParam)) {
 284           case IDOK:
 285           case IDCANCEL:
 286             EndDialog(hwnd, 1);
 287             return 0;
 288           case 101:
 289             EnableWindow(hwnd, 0);
 290             DialogBox(hinst, MAKEINTRESOURCE(214), hwnd, LicenceProc);
 291             EnableWindow(hwnd, 1);
 292             SetActiveWindow(hwnd);
 293             return 0;
 294         }
 295         return 0;
 296       case WM_CLOSE:
 297         EndDialog(hwnd, 1);
 298         return 0;
 299     }
 300     return 0;
 301 }
 302
 303 /*
 304  * Thread to generate a key.
 305  */
 306 struct rsa_key_thread_params {
 307     HWND progressbar;                  /* notify this with progress */
 308     HWND dialog;                       /* notify this on completion */
 309     int keysize;                       /* bits in key */
 310     int is_dsa;
 311     struct RSAKey *key;
 312     struct dss_key *dsskey;
 313 };
 314 static DWORD WINAPI generate_rsa_key_thread(void *param)
 315 {
 316     struct rsa_key_thread_params *params =
 317         (struct rsa_key_thread_params *) param;
 318     struct progress prog;
 319     prog.progbar = params->progressbar;
 320
 321     progress_update(&prog, PROGFN_INITIALISE, 0, 0);
 322
 323     if (params->is_dsa)
 324         dsa_generate(params->dsskey, params->keysize, progress_update, &prog);
 325     else
 326         rsa_generate(params->key, params->keysize, progress_update, &prog);
 327
 328     PostMessage(params->dialog, WM_DONEKEY, 0, 0);
 329
 330     sfree(params);
 331     return 0;
 332 }
 333
 334 struct MainDlgState {
 335     int collecting_entropy;
 336     int generation_thread_exists;
 337     int key_exists;
 338     int entropy_got, entropy_required, entropy_size;
 339     int keysize;
 340     int ssh2, is_dsa;
 341     char **commentptr;                 /* points to key.comment or ssh2key.comment */
 342     struct ssh2_userkey ssh2key;
 343     unsigned *entropy;
 344     struct RSAKey key;
 345     struct dss_key dsskey;
 346     HMENU filemenu, keymenu, cvtmenu;
 347 };
 348
 349 static void hidemany(HWND hwnd, const int *ids, int hideit)
 350 {
 351     while (*ids) {
 352         ShowWindow(GetDlgItem(hwnd, *ids++), (hideit ? SW_HIDE : SW_SHOW));
 353     }
 354 }
 355
 356 static void setupbigedit1(HWND hwnd, int id, int idstatic, struct RSAKey *key)
 357 {
 358     char *buffer;
 359     char *dec1, *dec2;
 360
 361     dec1 = bignum_decimal(key->exponent);
 362     dec2 = bignum_decimal(key->modulus);
 363     buffer = dupprintf("%d %s %s %s", bignum_bitcount(key->modulus),
 364                        dec1, dec2, key->comment);
 365     SetDlgItemText(hwnd, id, buffer);
 366     SetDlgItemText(hwnd, idstatic,
 367                    "&Public key for pasting into authorized_keys file:");
 368     sfree(dec1);
 369     sfree(dec2);
 370     sfree(buffer);
 371 }
 372
 373 static void setupbigedit2(HWND hwnd, int id, int idstatic,
 374                           struct ssh2_userkey *key)
 375 {
 376     unsigned char *pub_blob;
 377     char *buffer, *p;
 378     int pub_len;
 379     int i;
 380
 381     pub_blob = key->alg->public_blob(key->data, &pub_len);
 382     buffer = snewn(strlen(key->alg->name) + 4 * ((pub_len + 2) / 3) +
 383                    strlen(key->comment) + 3, char);
 384     strcpy(buffer, key->alg->name);
 385     p = buffer + strlen(buffer);
 386     *p++ = ' ';
 387     i = 0;
 388     while (i < pub_len) {
 389         int n = (pub_len - i < 3 ? pub_len - i : 3);
 390         base64_encode_atom(pub_blob + i, n, p);
 391         i += n;
 392         p += 4;
 393     }
 394     *p++ = ' ';
 395     strcpy(p, key->comment);
 396     SetDlgItemText(hwnd, id, buffer);
 397     SetDlgItemText(hwnd, idstatic, "&Public key for pasting into "
 398                    "OpenSSH authorized_keys file:");
 399     sfree(pub_blob);
 400     sfree(buffer);
 401 }
 402
 403 static int save_ssh1_pubkey(char *filename, struct RSAKey *key)
 404 {
 405     char *dec1, *dec2;
 406     FILE *fp;
 407
 408     dec1 = bignum_decimal(key->exponent);
 409     dec2 = bignum_decimal(key->modulus);
 410     fp = fopen(filename, "wb");
 411     if (!fp)
 412         return 0;
 413     fprintf(fp, "%d %s %s %s\n",
 414             bignum_bitcount(key->modulus), dec1, dec2, key->comment);
 415     fclose(fp);
 416     sfree(dec1);
 417     sfree(dec2);
 418     return 1;
 419 }
 420
 421 /*
 422  * Warn about the obsolescent key file format.
 423  */
 424 void old_keyfile_warning(void)
 425 {
 426     static const char mbtitle[] = "PuTTY Key File Warning";
 427     static const char message[] =
 428         "You are loading an SSH-2 private key which has an\n"
 429         "old version of the file format. This means your key\n"
 430         "file is not fully tamperproof. Future versions of\n"
 431         "PuTTY may stop supporting this private key format,\n"
 432         "so we recommend you convert your key to the new\n"
 433         "format.\n"
 434         "\n"
 435         "Once the key is loaded into PuTTYgen, you can perform\n"
 436         "this conversion simply by saving it again.";
 437
 438     MessageBox(NULL, message, mbtitle, MB_OK);
 439 }
 440
 441 static int save_ssh2_pubkey(char *filename, struct ssh2_userkey *key)
 442 {
 443     unsigned char *pub_blob;
 444     char *p;
 445     int pub_len;
 446     int i, column;
 447     FILE *fp;
 448
 449     pub_blob = key->alg->public_blob(key->data, &pub_len);
 450
 451     fp = fopen(filename, "wb");
 452     if (!fp)
 453         return 0;
 454
 455     fprintf(fp, "---- BEGIN SSH2 PUBLIC KEY ----\n");
 456
 457     fprintf(fp, "Comment: \"");
 458     for (p = key->comment; *p; p++) {
 459         if (*p == '\\' || *p == '\"')
 460             fputc('\\', fp);
 461         fputc(*p, fp);
 462     }
 463     fprintf(fp, "\"\n");
 464
 465     i = 0;
 466     column = 0;
 467     while (i < pub_len) {
 468         char buf[5];
 469         int n = (pub_len - i < 3 ? pub_len - i : 3);
 470         base64_encode_atom(pub_blob + i, n, buf);
 471         i += n;
 472         buf[4] = '\0';
 473         fputs(buf, fp);
 474         if (++column >= 16) {
 475             fputc('\n', fp);
 476             column = 0;
 477         }
 478     }
 479     if (column > 0)
 480         fputc('\n', fp);
 481
 482     fprintf(fp, "---- END SSH2 PUBLIC KEY ----\n");
 483     fclose(fp);
 484     sfree(pub_blob);
 485     return 1;
 486 }
 487
 488 enum {
 489     controlidstart = 100,
 490     IDC_QUIT,
 491     IDC_TITLE,
 492     IDC_BOX_KEY,
 493     IDC_NOKEY,
 494     IDC_GENERATING,
 495     IDC_PROGRESS,
 496     IDC_PKSTATIC, IDC_KEYDISPLAY,
 497     IDC_FPSTATIC, IDC_FINGERPRINT,
 498     IDC_COMMENTSTATIC, IDC_COMMENTEDIT,
 499     IDC_PASSPHRASE1STATIC, IDC_PASSPHRASE1EDIT,
 500     IDC_PASSPHRASE2STATIC, IDC_PASSPHRASE2EDIT,
 501     IDC_BOX_ACTIONS,
 502     IDC_GENSTATIC, IDC_GENERATE,
 503     IDC_LOADSTATIC, IDC_LOAD,
 504     IDC_SAVESTATIC, IDC_SAVE, IDC_SAVEPUB,
 505     IDC_BOX_PARAMS,
 506     IDC_TYPESTATIC, IDC_KEYSSH1, IDC_KEYSSH2RSA, IDC_KEYSSH2DSA,
 507     IDC_BITSSTATIC, IDC_BITS,
 508     IDC_ABOUT,
 509     IDC_GIVEHELP,
 510     IDC_IMPORT, IDC_EXPORT_OPENSSH, IDC_EXPORT_SSHCOM
 511 };
 512
 513 static const int nokey_ids[] = { IDC_NOKEY, 0 };
 514 static const int generating_ids[] = { IDC_GENERATING, IDC_PROGRESS, 0 };
 515 static const int gotkey_ids[] = {
 516     IDC_PKSTATIC, IDC_KEYDISPLAY,
 517     IDC_FPSTATIC, IDC_FINGERPRINT,
 518     IDC_COMMENTSTATIC, IDC_COMMENTEDIT,
 519     IDC_PASSPHRASE1STATIC, IDC_PASSPHRASE1EDIT,
 520     IDC_PASSPHRASE2STATIC, IDC_PASSPHRASE2EDIT, 0
 521 };
 522
 523 /*
 524  * Small UI helper function to switch the state of the main dialog
 525  * by enabling and disabling controls and menu items.
 526  */
 527 void ui_set_state(HWND hwnd, struct MainDlgState *state, int status)
 528 {
 529     int type;
 530
 531     switch (status) {
 532       case 0:                          /* no key */
 533         hidemany(hwnd, nokey_ids, FALSE);
 534         hidemany(hwnd, generating_ids, TRUE);
 535         hidemany(hwnd, gotkey_ids, TRUE);
 536         EnableWindow(GetDlgItem(hwnd, IDC_GENERATE), 1);
 537         EnableWindow(GetDlgItem(hwnd, IDC_LOAD), 1);
 538         EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 0);
 539         EnableWindow(GetDlgItem(hwnd, IDC_SAVEPUB), 0);
 540         EnableWindow(GetDlgItem(hwnd, IDC_KEYSSH1), 1);
 541         EnableWindow(GetDlgItem(hwnd, IDC_KEYSSH2RSA), 1);
 542         EnableWindow(GetDlgItem(hwnd, IDC_KEYSSH2DSA), 1);
 543         EnableWindow(GetDlgItem(hwnd, IDC_BITS), 1);
 544         EnableMenuItem(state->filemenu, IDC_LOAD, MF_ENABLED|MF_BYCOMMAND);
 545         EnableMenuItem(state->filemenu, IDC_SAVE, MF_GRAYED|MF_BYCOMMAND);
 546         EnableMenuItem(state->filemenu, IDC_SAVEPUB, MF_GRAYED|MF_BYCOMMAND);
 547         EnableMenuItem(state->keymenu, IDC_GENERATE, MF_ENABLED|MF_BYCOMMAND);
 548         EnableMenuItem(state->keymenu, IDC_KEYSSH1, MF_ENABLED|MF_BYCOMMAND);
 549         EnableMenuItem(state->keymenu, IDC_KEYSSH2RSA, MF_ENABLED|MF_BYCOMMAND);
 550         EnableMenuItem(state->keymenu, IDC_KEYSSH2DSA, MF_ENABLED|MF_BYCOMMAND);
 551         EnableMenuItem(state->cvtmenu, IDC_IMPORT, MF_ENABLED|MF_BYCOMMAND);
 552         EnableMenuItem(state->cvtmenu, IDC_EXPORT_OPENSSH,
 553                        MF_GRAYED|MF_BYCOMMAND);
 554         EnableMenuItem(state->cvtmenu, IDC_EXPORT_SSHCOM,
 555                        MF_GRAYED|MF_BYCOMMAND);
 556         break;
 557       case 1:                          /* generating key */
 558         hidemany(hwnd, nokey_ids, TRUE);
 559         hidemany(hwnd, generating_ids, FALSE);
 560         hidemany(hwnd, gotkey_ids, TRUE);
 561         EnableWindow(GetDlgItem(hwnd, IDC_GENERATE), 0);
 562         EnableWindow(GetDlgItem(hwnd, IDC_LOAD), 0);
 563         EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 0);
 564         EnableWindow(GetDlgItem(hwnd, IDC_SAVEPUB), 0);
 565         EnableWindow(GetDlgItem(hwnd, IDC_KEYSSH1), 0);
 566         EnableWindow(GetDlgItem(hwnd, IDC_KEYSSH2RSA), 0);
 567         EnableWindow(GetDlgItem(hwnd, IDC_KEYSSH2DSA), 0);
 568         EnableWindow(GetDlgItem(hwnd, IDC_BITS), 0);
 569         EnableMenuItem(state->filemenu, IDC_LOAD, MF_GRAYED|MF_BYCOMMAND);
 570         EnableMenuItem(state->filemenu, IDC_SAVE, MF_GRAYED|MF_BYCOMMAND);
 571         EnableMenuItem(state->filemenu, IDC_SAVEPUB, MF_GRAYED|MF_BYCOMMAND);
 572         EnableMenuItem(state->keymenu, IDC_GENERATE, MF_GRAYED|MF_BYCOMMAND);
 573         EnableMenuItem(state->keymenu, IDC_KEYSSH1, MF_GRAYED|MF_BYCOMMAND);
 574         EnableMenuItem(state->keymenu, IDC_KEYSSH2RSA, MF_GRAYED|MF_BYCOMMAND);
 575         EnableMenuItem(state->keymenu, IDC_KEYSSH2DSA, MF_GRAYED|MF_BYCOMMAND);
 576         EnableMenuItem(state->cvtmenu, IDC_IMPORT, MF_GRAYED|MF_BYCOMMAND);
 577         EnableMenuItem(state->cvtmenu, IDC_EXPORT_OPENSSH,
 578                        MF_GRAYED|MF_BYCOMMAND);
 579         EnableMenuItem(state->cvtmenu, IDC_EXPORT_SSHCOM,
 580                        MF_GRAYED|MF_BYCOMMAND);
 581         break;
 582       case 2:
 583         hidemany(hwnd, nokey_ids, TRUE);
 584         hidemany(hwnd, generating_ids, TRUE);
 585         hidemany(hwnd, gotkey_ids, FALSE);
 586         EnableWindow(GetDlgItem(hwnd, IDC_GENERATE), 1);
 587         EnableWindow(GetDlgItem(hwnd, IDC_LOAD), 1);
 588         EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 1);
 589         EnableWindow(GetDlgItem(hwnd, IDC_SAVEPUB), 1);
 590         EnableWindow(GetDlgItem(hwnd, IDC_KEYSSH1), 1);
 591         EnableWindow(GetDlgItem(hwnd, IDC_KEYSSH2RSA), 1);
 592         EnableWindow(GetDlgItem(hwnd, IDC_KEYSSH2DSA), 1);
 593         EnableWindow(GetDlgItem(hwnd, IDC_BITS), 1);
 594         EnableMenuItem(state->filemenu, IDC_LOAD, MF_ENABLED|MF_BYCOMMAND);
 595         EnableMenuItem(state->filemenu, IDC_SAVE, MF_ENABLED|MF_BYCOMMAND);
 596         EnableMenuItem(state->filemenu, IDC_SAVEPUB, MF_ENABLED|MF_BYCOMMAND);
 597         EnableMenuItem(state->keymenu, IDC_GENERATE, MF_ENABLED|MF_BYCOMMAND);
 598         EnableMenuItem(state->keymenu, IDC_KEYSSH1, MF_ENABLED|MF_BYCOMMAND);
 599         EnableMenuItem(state->keymenu, IDC_KEYSSH2RSA,MF_ENABLED|MF_BYCOMMAND);
 600         EnableMenuItem(state->keymenu, IDC_KEYSSH2DSA,MF_ENABLED|MF_BYCOMMAND);
 601         EnableMenuItem(state->cvtmenu, IDC_IMPORT, MF_ENABLED|MF_BYCOMMAND);
 602         /*
 603          * Enable export menu items if and only if the key type
 604          * supports this kind of export.
 605          */
 606         type = state->ssh2 ? SSH_KEYTYPE_SSH2 : SSH_KEYTYPE_SSH1;
 607 #define do_export_menuitem(x,y) \
 608     EnableMenuItem(state->cvtmenu, x, MF_BYCOMMAND | \
 609                        (import_target_type(y)==type?MF_ENABLED:MF_GRAYED))
 610         do_export_menuitem(IDC_EXPORT_OPENSSH, SSH_KEYTYPE_OPENSSH);
 611         do_export_menuitem(IDC_EXPORT_SSHCOM, SSH_KEYTYPE_SSHCOM);
 612 #undef do_export_menuitem
 613         break;
 614     }
 615 }
 616
 617 void load_key_file(HWND hwnd, struct MainDlgState *state,
 618                    Filename filename, int was_import_cmd)
 619 {
 620     char passphrase[PASSPHRASE_MAXLEN];
 621     int needs_pass;
 622     int type, realtype;
 623     int ret;
 624     const char *errmsg = NULL;
 625     char *comment;
 626     struct PassphraseProcStruct pps;
 627     struct RSAKey newkey1;
 628     struct ssh2_userkey *newkey2 = NULL;
 629
 630     type = realtype = key_type(&filename);
 631     if (type != SSH_KEYTYPE_SSH1 &&
 632         type != SSH_KEYTYPE_SSH2 &&
 633         !import_possible(type)) {
 634         char *msg = dupprintf("Couldn't load private key (%s)",
 635                               key_type_to_str(type));
 636         message_box(msg, "PuTTYgen Error", MB_OK | MB_ICONERROR,
 637                     HELPCTXID(errors_cantloadkey));
 638         sfree(msg);
 639         return;
 640     }
 641
 642     if (type != SSH_KEYTYPE_SSH1 &&
 643         type != SSH_KEYTYPE_SSH2) {
 644         realtype = type;
 645         type = import_target_type(type);
 646     }
 647
 648     comment = NULL;
 649     if (realtype == SSH_KEYTYPE_SSH1)
 650         needs_pass = rsakey_encrypted(&filename, &comment);
 651     else if (realtype == SSH_KEYTYPE_SSH2)
 652         needs_pass =
 653         ssh2_userkey_encrypted(&filename, &comment);
 654     else
 655         needs_pass = import_encrypted(&filename, realtype,
 656                                       &comment);
 657     pps.passphrase = passphrase;
 658     pps.comment = comment;
 659     do {
 660         if (needs_pass) {
 661             int dlgret;
 662             dlgret = DialogBoxParam(hinst,
 663                                     MAKEINTRESOURCE(210),
 664                                     NULL, PassphraseProc,
 665                                     (LPARAM) &pps);
 666             if (!dlgret) {
 667                 ret = -2;
 668                 break;
 669             }
 670         } else
 671             *passphrase = '\0';
 672         if (type == SSH_KEYTYPE_SSH1) {
 673             if (realtype == type)
 674                 ret = loadrsakey(&filename, &newkey1,
 675                                  passphrase, &errmsg);
 676             else
 677                 ret = import_ssh1(&filename, realtype,
 678                                   &newkey1, passphrase, &errmsg);
 679         } else {
 680             if (realtype == type)
 681                 newkey2 = ssh2_load_userkey(&filename,
 682                                             passphrase, &errmsg);
 683             else
 684                 newkey2 = import_ssh2(&filename, realtype,
 685                                       passphrase, &errmsg);
 686             if (newkey2 == SSH2_WRONG_PASSPHRASE)
 687                 ret = -1;
 688             else if (!newkey2)
 689                 ret = 0;
 690             else
 691                 ret = 1;
 692         }
 693     } while (ret == -1);
 694     if (comment)
 695         sfree(comment);
 696     if (ret == 0) {
 697         char *msg = dupprintf("Couldn't load private key (%s)", errmsg);
 698         message_box(msg, "PuTTYgen Error", MB_OK | MB_ICONERROR,
 699                     HELPCTXID(errors_cantloadkey));
 700         sfree(msg);
 701     } else if (ret == 1) {
 702         /*
 703          * Now update the key controls with all the
 704          * key data.
 705          */
 706         {
 707             SetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT,
 708                            passphrase);
 709             SetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT,
 710                            passphrase);
 711             if (type == SSH_KEYTYPE_SSH1) {
 712                 char buf[128];
 713                 char *savecomment;
 714
 715                 state->ssh2 = FALSE;
 716                 state->commentptr = &state->key.comment;
 717                 state->key = newkey1;
 718
 719                 /*
 720                  * Set the key fingerprint.
 721                  */
 722                 savecomment = state->key.comment;
 723                 state->key.comment = NULL;
 724                 rsa_fingerprint(buf, sizeof(buf),
 725                                 &state->key);
 726                 state->key.comment = savecomment;
 727
 728                 SetDlgItemText(hwnd, IDC_FINGERPRINT, buf);
 729                 /*
 730                  * Construct a decimal representation
 731                  * of the key, for pasting into
 732                  * .ssh/authorized_keys on a Unix box.
 733                  */
 734                 setupbigedit1(hwnd, IDC_KEYDISPLAY,
 735                               IDC_PKSTATIC, &state->key);
 736             } else {
 737                 char *fp;
 738                 char *savecomment;
 739
 740                 state->ssh2 = TRUE;
 741                 state->commentptr =
 742                     &state->ssh2key.comment;
 743                 state->ssh2key = *newkey2;      /* structure copy */
 744                 sfree(newkey2);
 745
 746                 savecomment = state->ssh2key.comment;
 747                 state->ssh2key.comment = NULL;
 748                 fp =
 749                     state->ssh2key.alg->
 750                     fingerprint(state->ssh2key.data);
 751                 state->ssh2key.comment = savecomment;
 752
 753                 SetDlgItemText(hwnd, IDC_FINGERPRINT, fp);
 754                 sfree(fp);
 755
 756                 setupbigedit2(hwnd, IDC_KEYDISPLAY,
 757                               IDC_PKSTATIC, &state->ssh2key);
 758             }
 759             SetDlgItemText(hwnd, IDC_COMMENTEDIT,
 760                            *state->commentptr);
 761         }
 762         /*
 763          * Finally, hide the progress bar and show
 764          * the key data.
 765          */
 766         ui_set_state(hwnd, state, 2);
 767         state->key_exists = TRUE;
 768
 769         /*
 770          * If the user has imported a foreign key
 771          * using the Load command, let them know.
 772          * If they've used the Import command, be
 773          * silent.
 774          */
 775         if (realtype != type && !was_import_cmd) {
 776             char msg[512];
 777             sprintf(msg, "Successfully imported foreign key\n"
 778                     "(%s).\n"
 779                     "To use this key with PuTTY, you need to\n"
 780                     "use the \"Save private key\" command to\n"
 781                     "save it in PuTTY's own format.",
 782                     key_type_to_str(realtype));
 783             MessageBox(NULL, msg, "PuTTYgen Notice",
 784                        MB_OK | MB_ICONINFORMATION);
 785         }
 786     }
 787 }
 788
 789 /*
 790  * Dialog-box function for the main PuTTYgen dialog box.
 791  */
 792 static int CALLBACK MainDlgProc(HWND hwnd, UINT msg,
 793                                 WPARAM wParam, LPARAM lParam)
 794 {
 795     static const char generating_msg[] =
 796         "Please wait while a key is generated...";
 797     static const char entropy_msg[] =
 798         "Please generate some randomness by moving the mouse over the blank area.";
 799     struct MainDlgState *state;
 800
 801     switch (msg) {
 802       case WM_INITDIALOG:
 803         if (help_path)
 804             SetWindowLongPtr(hwnd, GWL_EXSTYLE,
 805                              GetWindowLongPtr(hwnd, GWL_EXSTYLE) |
 806                              WS_EX_CONTEXTHELP);
 807         else {
 808             /*
 809              * If we add a Help button, this is where we destroy it
 810              * if the help file isn't present.
 811              */
 812         }
 813         requested_help = FALSE;
 814         SendMessage(hwnd, WM_SETICON, (WPARAM) ICON_BIG,
 815                     (LPARAM) LoadIcon(hinst, MAKEINTRESOURCE(200)));
 816
 817         state = snew(struct MainDlgState);
 818         state->generation_thread_exists = FALSE;
 819         state->collecting_entropy = FALSE;
 820         state->entropy = NULL;
 821         state->key_exists = FALSE;
 822         SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR) state);
 823         {
 824             HMENU menu, menu1;
 825
 826             menu = CreateMenu();
 827
 828             menu1 = CreateMenu();
 829             AppendMenu(menu1, MF_ENABLED, IDC_LOAD, "&Load private key");
 830             AppendMenu(menu1, MF_ENABLED, IDC_SAVEPUB, "Save p&ublic key");
 831             AppendMenu(menu1, MF_ENABLED, IDC_SAVE, "&Save private key");
 832             AppendMenu(menu1, MF_SEPARATOR, 0, 0);
 833             AppendMenu(menu1, MF_ENABLED, IDC_QUIT, "E&xit");
 834             AppendMenu(menu, MF_POPUP | MF_ENABLED, (UINT) menu1, "&File");
 835             state->filemenu = menu1;
 836
 837             menu1 = CreateMenu();
 838             AppendMenu(menu1, MF_ENABLED, IDC_GENERATE, "&Generate key pair");
 839             AppendMenu(menu1, MF_SEPARATOR, 0, 0);
 840             AppendMenu(menu1, MF_ENABLED, IDC_KEYSSH1, "SSH-&1 key (RSA)");
 841             AppendMenu(menu1, MF_ENABLED, IDC_KEYSSH2RSA, "SSH-2 &RSA key");
 842             AppendMenu(menu1, MF_ENABLED, IDC_KEYSSH2DSA, "SSH-2 &DSA key");
 843             AppendMenu(menu, MF_POPUP | MF_ENABLED, (UINT) menu1, "&Key");
 844             state->keymenu = menu1;
 845
 846             menu1 = CreateMenu();
 847             AppendMenu(menu1, MF_ENABLED, IDC_IMPORT, "&Import key");
 848             AppendMenu(menu1, MF_SEPARATOR, 0, 0);
 849             AppendMenu(menu1, MF_ENABLED, IDC_EXPORT_OPENSSH,
 850                        "Export &OpenSSH key");
 851             AppendMenu(menu1, MF_ENABLED, IDC_EXPORT_SSHCOM,
 852                        "Export &ssh.com key");
 853             AppendMenu(menu, MF_POPUP | MF_ENABLED, (UINT) menu1,
 854                        "Con&versions");
 855             state->cvtmenu = menu1;
 856
 857             menu1 = CreateMenu();
 858             AppendMenu(menu1, MF_ENABLED, IDC_ABOUT, "&About");
 859             if (help_path)
 860                 AppendMenu(menu1, MF_ENABLED, IDC_GIVEHELP, "&Help");
 861             AppendMenu(menu, MF_POPUP | MF_ENABLED, (UINT) menu1, "&Help");
 862
 863             SetMenu(hwnd, menu);
 864         }
 865
 866         /*
 867          * Centre the window.
 868          */
 869         {                              /* centre the window */
 870             RECT rs, rd;
 871             HWND hw;
 872
 873             hw = GetDesktopWindow();
 874             if (GetWindowRect(hw, &rs) && GetWindowRect(hwnd, &rd))
 875                 MoveWindow(hwnd,
 876                            (rs.right + rs.left + rd.left - rd.right) / 2,
 877                            (rs.bottom + rs.top + rd.top - rd.bottom) / 2,
 878                            rd.right - rd.left, rd.bottom - rd.top, TRUE);
 879         }
 880
 881         {
 882             struct ctlpos cp, cp2;
 883
 884             /* Accelerators used: acglops1rbd */
 885
 886             ctlposinit(&cp, hwnd, 4, 4, 4);
 887             beginbox(&cp, "Key", IDC_BOX_KEY);
 888             cp2 = cp;
 889             statictext(&cp2, "No key.", 1, IDC_NOKEY);
 890             cp2 = cp;
 891             statictext(&cp2, "", 1, IDC_GENERATING);
 892             progressbar(&cp2, IDC_PROGRESS);
 893             bigeditctrl(&cp,
 894                         "&Public key for pasting into authorized_keys file:",
 895                         IDC_PKSTATIC, IDC_KEYDISPLAY, 5);
 896             SendDlgItemMessage(hwnd, IDC_KEYDISPLAY, EM_SETREADONLY, 1, 0);
 897             staticedit(&cp, "Key f&ingerprint:", IDC_FPSTATIC,
 898                        IDC_FINGERPRINT, 75);
 899             SendDlgItemMessage(hwnd, IDC_FINGERPRINT, EM_SETREADONLY, 1,
 900                                0);
 901             staticedit(&cp, "Key &comment:", IDC_COMMENTSTATIC,
 902                        IDC_COMMENTEDIT, 75);
 903             staticpassedit(&cp, "Key p&assphrase:", IDC_PASSPHRASE1STATIC,
 904                            IDC_PASSPHRASE1EDIT, 75);
 905             staticpassedit(&cp, "C&onfirm passphrase:",
 906                            IDC_PASSPHRASE2STATIC, IDC_PASSPHRASE2EDIT, 75);
 907             endbox(&cp);
 908             beginbox(&cp, "Actions", IDC_BOX_ACTIONS);
 909             staticbtn(&cp, "Generate a public/private key pair",
 910                       IDC_GENSTATIC, "&Generate", IDC_GENERATE);
 911             staticbtn(&cp, "Load an existing private key file",
 912                       IDC_LOADSTATIC, "&Load", IDC_LOAD);
 913             static2btn(&cp, "Save the generated key", IDC_SAVESTATIC,
 914                        "Save p&ublic key", IDC_SAVEPUB,
 915                        "&Save private key", IDC_SAVE);
 916             endbox(&cp);
 917             beginbox(&cp, "Parameters", IDC_BOX_PARAMS);
 918             radioline(&cp, "Type of key to generate:", IDC_TYPESTATIC, 3,
 919                       "SSH-&1 (RSA)", IDC_KEYSSH1,
 920                       "SSH-2 &RSA", IDC_KEYSSH2RSA,
 921                       "SSH-2 &DSA", IDC_KEYSSH2DSA, NULL);
 922             staticedit(&cp, "Number of &bits in a generated key:",
 923                        IDC_BITSSTATIC, IDC_BITS, 20);
 924             endbox(&cp);
 925         }
 926         CheckRadioButton(hwnd, IDC_KEYSSH1, IDC_KEYSSH2DSA, IDC_KEYSSH2RSA);
 927         CheckMenuRadioItem(state->keymenu, IDC_KEYSSH1, IDC_KEYSSH2DSA,
 928                            IDC_KEYSSH2RSA, MF_BYCOMMAND);
 929         SetDlgItemInt(hwnd, IDC_BITS, DEFAULT_KEYSIZE, FALSE);
 930
 931         /*
 932          * Initially, hide the progress bar and the key display,
 933          * and show the no-key display. Also disable the Save
 934          * buttons, because with no key we obviously can't save
 935          * anything.
 936          */
 937         ui_set_state(hwnd, state, 0);
 938
 939         /*
 940          * Load a key file if one was provided on the command line.
 941          */
 942         if (cmdline_keyfile)
 943             load_key_file(hwnd, state, filename_from_str(cmdline_keyfile), 0);
 944
 945         return 1;
 946       case WM_MOUSEMOVE:
 947         state = (struct MainDlgState *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
 948         if (state->collecting_entropy &&
 949             state->entropy && state->entropy_got < state->entropy_required) {
 950             state->entropy[state->entropy_got++] = lParam;
 951             state->entropy[state->entropy_got++] = GetMessageTime();
 952             SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS,
 953                                state->entropy_got, 0);
 954             if (state->entropy_got >= state->entropy_required) {
 955                 struct rsa_key_thread_params *params;
 956                 DWORD threadid;
 957
 958                 /*
 959                  * Seed the entropy pool
 960                  */
 961                 random_add_heavynoise(state->entropy, state->entropy_size);
 962                 memset(state->entropy, 0, state->entropy_size);
 963                 sfree(state->entropy);
 964                 state->collecting_entropy = FALSE;
 965
 966                 SetDlgItemText(hwnd, IDC_GENERATING, generating_msg);
 967                 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETRANGE, 0,
 968                                    MAKELPARAM(0, PROGRESSRANGE));
 969                 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS, 0, 0);
 970
 971                 params = snew(struct rsa_key_thread_params);
 972                 params->progressbar = GetDlgItem(hwnd, IDC_PROGRESS);
 973                 params->dialog = hwnd;
 974                 params->keysize = state->keysize;
 975                 params->is_dsa = state->is_dsa;
 976                 params->key = &state->key;
 977                 params->dsskey = &state->dsskey;
 978
 979                 if (!CreateThread(NULL, 0, generate_rsa_key_thread,
 980                                   params, 0, &threadid)) {
 981                     MessageBox(hwnd, "Out of thread resources",
 982                                "Key generation error",
 983                                MB_OK | MB_ICONERROR);
 984                     sfree(params);
 985                 } else {
 986                     state->generation_thread_exists = TRUE;
 987                 }
 988             }
 989         }
 990         break;
 991       case WM_COMMAND:
 992         switch (LOWORD(wParam)) {
 993           case IDC_KEYSSH1:
 994           case IDC_KEYSSH2RSA:
 995           case IDC_KEYSSH2DSA:
 996             {
 997                 state = (struct MainDlgState *)
 998                     GetWindowLongPtr(hwnd, GWLP_USERDATA);
 999                 if (!IsDlgButtonChecked(hwnd, LOWORD(wParam)))
1000                     CheckRadioButton(hwnd, IDC_KEYSSH1, IDC_KEYSSH2DSA,
1001                                      LOWORD(wParam));
1002                 CheckMenuRadioItem(state->keymenu, IDC_KEYSSH1, IDC_KEYSSH2DSA,
1003                                    LOWORD(wParam), MF_BYCOMMAND);
1004             }
1005             break;
1006           case IDC_QUIT:
1007             PostMessage(hwnd, WM_CLOSE, 0, 0);
1008             break;
1009           case IDC_COMMENTEDIT:
1010             if (HIWORD(wParam) == EN_CHANGE) {
1011                 state = (struct MainDlgState *)
1012                     GetWindowLongPtr(hwnd, GWLP_USERDATA);
1013                 if (state->key_exists) {
1014                     HWND editctl = GetDlgItem(hwnd, IDC_COMMENTEDIT);
1015                     int len = GetWindowTextLength(editctl);
1016                     if (*state->commentptr)
1017                         sfree(*state->commentptr);
1018                     *state->commentptr = snewn(len + 1, char);
1019                     GetWindowText(editctl, *state->commentptr, len + 1);
1020                     if (state->ssh2) {
1021                         setupbigedit2(hwnd, IDC_KEYDISPLAY, IDC_PKSTATIC,
1022                                       &state->ssh2key);
1023                     } else {
1024                         setupbigedit1(hwnd, IDC_KEYDISPLAY, IDC_PKSTATIC,
1025                                       &state->key);
1026                     }
1027                 }
1028             }
1029             break;
1030           case IDC_ABOUT:
1031             EnableWindow(hwnd, 0);
1032             DialogBox(hinst, MAKEINTRESOURCE(213), hwnd, AboutProc);
1033             EnableWindow(hwnd, 1);
1034             SetActiveWindow(hwnd);
1035             return 0;
1036           case IDC_GIVEHELP:
1037             if (HIWORD(wParam) == BN_CLICKED ||
1038                 HIWORD(wParam) == BN_DOUBLECLICKED) {
1039                 if (help_path) {
1040                     WinHelp(hwnd, help_path, HELP_COMMAND,
1041                             (DWORD)"JI(`',`puttygen.general')");
1042                     requested_help = TRUE;
1043                 }
1044             }
1045             return 0;
1046           case IDC_GENERATE:
1047             if (HIWORD(wParam) != BN_CLICKED &&
1048                 HIWORD(wParam) != BN_DOUBLECLICKED)
1049                 break;
1050             state =
1051                 (struct MainDlgState *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
1052             if (!state->generation_thread_exists) {
1053                 BOOL ok;
1054                 state->keysize = GetDlgItemInt(hwnd, IDC_BITS, &ok, FALSE);
1055                 if (!ok)
1056                     state->keysize = DEFAULT_KEYSIZE;
1057                 /* If we ever introduce a new key type, check it here! */
1058                 state->ssh2 = !IsDlgButtonChecked(hwnd, IDC_KEYSSH1);
1059                 state->is_dsa = IsDlgButtonChecked(hwnd, IDC_KEYSSH2DSA);
1060                 if (state->keysize < 256) {
1061                     int ret = MessageBox(hwnd,
1062                                          "PuTTYgen will not generate a key"
1063                                          " smaller than 256 bits.\n"
1064                                          "Key length reset to 256. Continue?",
1065                                          "PuTTYgen Warning",
1066                                          MB_ICONWARNING | MB_OKCANCEL);
1067                     if (ret != IDOK)
1068                         break;
1069                     state->keysize = 256;
1070                     SetDlgItemInt(hwnd, IDC_BITS, 256, FALSE);
1071                 }
1072                 ui_set_state(hwnd, state, 1);
1073                 SetDlgItemText(hwnd, IDC_GENERATING, entropy_msg);
1074                 state->key_exists = FALSE;
1075                 state->collecting_entropy = TRUE;
1076
1077                 /*
1078                  * My brief statistical tests on mouse movements
1079                  * suggest that there are about 2.5 bits of
1080                  * randomness in the x position, 2.5 in the y
1081                  * position, and 1.7 in the message time, making
1082                  * 5.7 bits of unpredictability per mouse movement.
1083                  * However, other people have told me it's far less
1084                  * than that, so I'm going to be stupidly cautious
1085                  * and knock that down to a nice round 2. With this
1086                  * method, we require two words per mouse movement,
1087                  * so with 2 bits per mouse movement we expect 2
1088                  * bits every 2 words.
1089                  */
1090                 state->entropy_required = (state->keysize / 2) * 2;
1091                 state->entropy_got = 0;
1092                 state->entropy_size = (state->entropy_required *
1093                                        sizeof(unsigned));
1094                 state->entropy = snewn(state->entropy_required, unsigned);
1095
1096                 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETRANGE, 0,
1097                                    MAKELPARAM(0, state->entropy_required));
1098                 SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS, 0, 0);
1099             }
1100             break;
1101           case IDC_SAVE:
1102           case IDC_EXPORT_OPENSSH:
1103           case IDC_EXPORT_SSHCOM:
1104             if (HIWORD(wParam) != BN_CLICKED)
1105                 break;
1106             state =
1107                 (struct MainDlgState *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
1108             if (state->key_exists) {
1109                 char filename[FILENAME_MAX];
1110                 char passphrase[PASSPHRASE_MAXLEN];
1111                 char passphrase2[PASSPHRASE_MAXLEN];
1112                 int type, realtype;
1113
1114                 if (state->ssh2)
1115                     realtype = SSH_KEYTYPE_SSH2;
1116                 else
1117                     realtype = SSH_KEYTYPE_SSH1;
1118
1119                 if (LOWORD(wParam) == IDC_EXPORT_OPENSSH)
1120                     type = SSH_KEYTYPE_OPENSSH;
1121                 else if (LOWORD(wParam) == IDC_EXPORT_SSHCOM)
1122                     type = SSH_KEYTYPE_SSHCOM;
1123                 else
1124                     type = realtype;
1125
1126                 if (type != realtype &&
1127                     import_target_type(type) != realtype) {
1128                     char msg[256];
1129                     sprintf(msg, "Cannot export an SSH-%d key in an SSH-%d"
1130                             " format", (state->ssh2 ? 2 : 1),
1131                             (state->ssh2 ? 1 : 2));
1132                     MessageBox(hwnd, msg,
1133                                "PuTTYgen Error", MB_OK | MB_ICONERROR);
1134                     break;
1135                 }
1136
1137                 GetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT,
1138                                passphrase, sizeof(passphrase));
1139                 GetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT,
1140                                passphrase2, sizeof(passphrase2));
1141                 if (strcmp(passphrase, passphrase2)) {
1142                     MessageBox(hwnd,
1143                                "The two passphrases given do not match.",
1144                                "PuTTYgen Error", MB_OK | MB_ICONERROR);
1145                     break;
1146                 }
1147                 if (!*passphrase) {
1148                     int ret;
1149                     ret = MessageBox(hwnd,
1150                                      "Are you sure you want to save this key\n"
1151                                      "without a passphrase to protect it?",
1152                                      "PuTTYgen Warning",
1153                                      MB_YESNO | MB_ICONWARNING);
1154                     if (ret != IDYES)
1155                         break;
1156                 }
1157                 if (prompt_keyfile(hwnd, "Save private key as:",
1158                                    filename, 1, (type == realtype))) {
1159                     int ret;
1160                     FILE *fp = fopen(filename, "r");
1161                     if (fp) {
1162                         char *buffer;
1163                         fclose(fp);
1164                         buffer = dupprintf("Overwrite existing file\n%s?",
1165                                            filename);
1166                         ret = MessageBox(hwnd, buffer, "PuTTYgen Warning",
1167                                          MB_YESNO | MB_ICONWARNING);
1168                         sfree(buffer);
1169                         if (ret != IDYES)
1170                             break;
1171                     }
1172
1173                     if (state->ssh2) {
1174                         Filename fn = filename_from_str(filename);
1175                         if (type != realtype)
1176                             ret = export_ssh2(&fn, type, &state->ssh2key,
1177                                               *passphrase ? passphrase : NULL);
1178                         else
1179                             ret = ssh2_save_userkey(&fn, &state->ssh2key,
1180                                                     *passphrase ? passphrase :
1181                                                     NULL);
1182                     } else {
1183                         Filename fn = filename_from_str(filename);
1184                         if (type != realtype)
1185                             ret = export_ssh1(&fn, type, &state->key,
1186                                               *passphrase ? passphrase : NULL);
1187                         else
1188                             ret = saversakey(&fn, &state->key,
1189                                              *passphrase ? passphrase : NULL);
1190                     }
1191                     if (ret <= 0) {
1192                         MessageBox(hwnd, "Unable to save key file",
1193                                    "PuTTYgen Error", MB_OK | MB_ICONERROR);
1194                     }
1195                 }
1196             }
1197             break;
1198           case IDC_SAVEPUB:
1199             if (HIWORD(wParam) != BN_CLICKED)
1200                 break;
1201             state =
1202                 (struct MainDlgState *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
1203             if (state->key_exists) {
1204                 char filename[FILENAME_MAX];
1205                 if (prompt_keyfile(hwnd, "Save public key as:",
1206                                    filename, 1, 0)) {
1207                     int ret;
1208                     FILE *fp = fopen(filename, "r");
1209                     if (fp) {
1210                         char *buffer;
1211                         fclose(fp);
1212                         buffer = dupprintf("Overwrite existing file\n%s?",
1213                                            filename);
1214                         ret = MessageBox(hwnd, buffer, "PuTTYgen Warning",
1215                                          MB_YESNO | MB_ICONWARNING);
1216                         sfree(buffer);
1217                         if (ret != IDYES)
1218                             break;
1219                     }
1220                     if (state->ssh2) {
1221                         ret = save_ssh2_pubkey(filename, &state->ssh2key);
1222                     } else {
1223                         ret = save_ssh1_pubkey(filename, &state->key);
1224                     }
1225                     if (ret <= 0) {
1226                         MessageBox(hwnd, "Unable to save key file",
1227                                    "PuTTYgen Error", MB_OK | MB_ICONERROR);
1228                     }
1229                 }
1230             }
1231             break;
1232           case IDC_LOAD:
1233           case IDC_IMPORT:
1234             if (HIWORD(wParam) != BN_CLICKED)
1235                 break;
1236             state =
1237                 (struct MainDlgState *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
1238             if (!state->generation_thread_exists) {
1239                 char filename[FILENAME_MAX];
1240                 if (prompt_keyfile(hwnd, "Load private key:",
1241                                    filename, 0, LOWORD(wParam)==IDC_LOAD))
1242                     load_key_file(hwnd, state, filename_from_str(filename),
1243                                   LOWORD(wParam) != IDC_LOAD);
1244             }
1245             break;
1246         }
1247         return 0;
1248       case WM_DONEKEY:
1249         state = (struct MainDlgState *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
1250         state->generation_thread_exists = FALSE;
1251         state->key_exists = TRUE;
1252         SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETRANGE, 0,
1253                            MAKELPARAM(0, PROGRESSRANGE));
1254         SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS, PROGRESSRANGE, 0);
1255         if (state->ssh2) {
1256             if (state->is_dsa) {
1257                 state->ssh2key.data = &state->dsskey;
1258                 state->ssh2key.alg = &ssh_dss;
1259             } else {
1260                 state->ssh2key.data = &state->key;
1261                 state->ssh2key.alg = &ssh_rsa;
1262             }
1263             state->commentptr = &state->ssh2key.comment;
1264         } else {
1265             state->commentptr = &state->key.comment;
1266         }
1267         /*
1268          * Invent a comment for the key. We'll do this by including
1269          * the date in it. This will be so horrifyingly ugly that
1270          * the user will immediately want to change it, which is
1271          * what we want :-)
1272          */
1273         *state->commentptr = snewn(30, char);
1274         {
1275             struct tm tm;
1276             tm = ltime();
1277             if (state->is_dsa)
1278                 strftime(*state->commentptr, 30, "dsa-key-%Y%m%d", &tm);
1279             else
1280                 strftime(*state->commentptr, 30, "rsa-key-%Y%m%d", &tm);
1281         }
1282
1283         /*
1284          * Now update the key controls with all the key data.
1285          */
1286         {
1287             char *savecomment;
1288             /*
1289              * Blank passphrase, initially. This isn't dangerous,
1290              * because we will warn (Are You Sure?) before allowing
1291              * the user to save an unprotected private key.
1292              */
1293             SetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT, "");
1294             SetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT, "");
1295             /*
1296              * Set the comment.
1297              */
1298             SetDlgItemText(hwnd, IDC_COMMENTEDIT, *state->commentptr);
1299             /*
1300              * Set the key fingerprint.
1301              */
1302             savecomment = *state->commentptr;
1303             *state->commentptr = NULL;
1304             if (state->ssh2) {
1305                 char *fp;
1306                 fp = state->ssh2key.alg->fingerprint(state->ssh2key.data);
1307                 SetDlgItemText(hwnd, IDC_FINGERPRINT, fp);
1308                 sfree(fp);
1309             } else {
1310                 char buf[128];
1311                 rsa_fingerprint(buf, sizeof(buf), &state->key);
1312                 SetDlgItemText(hwnd, IDC_FINGERPRINT, buf);
1313             }
1314             *state->commentptr = savecomment;
1315             /*
1316              * Construct a decimal representation of the key, for
1317              * pasting into .ssh/authorized_keys or
1318              * .ssh/authorized_keys2 on a Unix box.
1319              */
1320             if (state->ssh2) {
1321                 setupbigedit2(hwnd, IDC_KEYDISPLAY,
1322                               IDC_PKSTATIC, &state->ssh2key);
1323             } else {
1324                 setupbigedit1(hwnd, IDC_KEYDISPLAY,
1325                               IDC_PKSTATIC, &state->key);
1326             }
1327         }
1328         /*
1329          * Finally, hide the progress bar and show the key data.
1330          */
1331         ui_set_state(hwnd, state, 2);
1332         break;
1333       case WM_HELP:
1334         if (help_path) {
1335             int id = ((LPHELPINFO)lParam)->iCtrlId;
1336             char *topic = NULL;
1337             switch (id) {
1338               case IDC_GENERATING:
1339               case IDC_PROGRESS:
1340               case IDC_GENSTATIC:
1341               case IDC_GENERATE:
1342                 topic = "puttygen.generate"; break;
1343               case IDC_PKSTATIC:
1344               case IDC_KEYDISPLAY:
1345                 topic = "puttygen.pastekey"; break;
1346               case IDC_FPSTATIC:
1347               case IDC_FINGERPRINT:
1348                 topic = "puttygen.fingerprint"; break;
1349               case IDC_COMMENTSTATIC:
1350               case IDC_COMMENTEDIT:
1351                 topic = "puttygen.comment"; break;
1352               case IDC_PASSPHRASE1STATIC:
1353               case IDC_PASSPHRASE1EDIT:
1354               case IDC_PASSPHRASE2STATIC:
1355               case IDC_PASSPHRASE2EDIT:
1356                 topic = "puttygen.passphrase"; break;
1357               case IDC_LOADSTATIC:
1358               case IDC_LOAD:
1359                 topic = "puttygen.load"; break;
1360               case IDC_SAVESTATIC:
1361               case IDC_SAVE:
1362                 topic = "puttygen.savepriv"; break;
1363               case IDC_SAVEPUB:
1364                 topic = "puttygen.savepub"; break;
1365               case IDC_TYPESTATIC:
1366               case IDC_KEYSSH1:
1367               case IDC_KEYSSH2RSA:
1368               case IDC_KEYSSH2DSA:
1369                 topic = "puttygen.keytype"; break;
1370               case IDC_BITSSTATIC:
1371               case IDC_BITS:
1372                 topic = "puttygen.bits"; break;
1373               case IDC_IMPORT:
1374               case IDC_EXPORT_OPENSSH:
1375               case IDC_EXPORT_SSHCOM:
1376                 topic = "puttygen.conversions"; break;
1377             }
1378             if (topic) {
1379                 char *cmd = dupprintf("JI(`',`%s')", topic);
1380                 WinHelp(hwnd, help_path, HELP_COMMAND, (DWORD)cmd);
1381                 sfree(cmd);
1382                 requested_help = TRUE;
1383             } else {
1384                 MessageBeep(0);
1385             }
1386         }
1387         break;
1388       case WM_CLOSE:
1389         state = (struct MainDlgState *) GetWindowLongPtr(hwnd, GWLP_USERDATA);
1390         sfree(state);
1391         if (requested_help) {
1392             WinHelp(hwnd, help_path, HELP_QUIT, 0);
1393             requested_help = FALSE;
1394         }
1395         EndDialog(hwnd, 1);
1396         return 0;
1397     }
1398     return 0;
1399 }
1400
1401 void cleanup_exit(int code) { exit(code); }
1402
1403 int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show)
1404 {
1405     int argc;
1406     char **argv;
1407
1408     InitCommonControls();
1409     hinst = inst;
1410     hwnd = NULL;
1411
1412     /*
1413      * See if we can find our Help file.
1414      */
1415     {
1416         char b[2048], *p, *q, *r;
1417         FILE *fp;
1418         GetModuleFileName(NULL, b, sizeof(b) - 1);
1419         r = b;
1420         p = strrchr(b, '\\');
1421         if (p && p >= r) r = p+1;
1422         q = strrchr(b, ':');
1423         if (q && q >= r) r = q+1;
1424         strcpy(r, PUTTY_HELP_FILE);
1425         if ( (fp = fopen(b, "r")) != NULL) {
1426             help_path = dupstr(b);
1427             fclose(fp);
1428         } else
1429             help_path = NULL;
1430     }
1431
1432     split_into_argv(cmdline, &argc, &argv, NULL);
1433
1434     if (argc > 0) {
1435         if (!strcmp(argv[0], "-pgpfp")) {
1436             pgp_fingerprints();
1437             exit(1);
1438         } else {
1439             /*
1440              * Assume the first argument to be a private key file, and
1441              * attempt to load it.
1442              */
1443             cmdline_keyfile = argv[0];
1444         }
1445     }
1446
1447     random_ref();
1448     return DialogBox(hinst, MAKEINTRESOURCE(201), NULL,
1449                      MainDlgProc) != IDOK;
1450 }