[sgt/putty] / puttygen.c

/*
 * PuTTY key generation front end.
 */

#include <windows.h>
#include <commctrl.h>
#include <time.h>
#include <stdio.h>

#define PUTTY_DO_GLOBALS

#include "putty.h"
#include "ssh.h"
#include "winstuff.h"

#define WM_DONEKEY (WM_XUSER + 1)

#define DEFAULT_KEYSIZE 1024

/* ----------------------------------------------------------------------
 * Progress report code. This is really horrible :-)
 */
#define PHASE1TOTAL 0x10000
#define PHASE2TOTAL 0x10000
#define PHASE3TOTAL 0x04000
#define PHASE1START 0
#define PHASE2START (PHASE1TOTAL)
#define PHASE3START (PHASE1TOTAL + PHASE2TOTAL)
#define TOTALTOTAL  (PHASE1TOTAL + PHASE2TOTAL + PHASE3TOTAL)
#define PROGRESSBIGRANGE 65535
#define DIVISOR     ((TOTALTOTAL + PROGRESSBIGRANGE - 1) / PROGRESSBIGRANGE)
#define PROGRESSRANGE (TOTALTOTAL / DIVISOR)
struct progress {
    unsigned phase1param, phase1current, phase1n;
    unsigned phase2param, phase2current, phase2n;
    unsigned phase3mult;
    HWND progbar;
};

static void progress_update(void *param, int phase, int iprogress) {
    struct progress *p = (struct progress *)param;
    unsigned progress = iprogress;
    int position;

    switch (phase) {
      case -1:
        p->phase1param = 0x10000 + progress;
        p->phase1current = 0x10000; p->phase1n = 0;
        return;
      case -2:
        p->phase2param = 0x10000 + progress;
        p->phase2current = 0x10000; p->phase2n = 0;
        return;
      case -3:
        p->phase3mult = PHASE3TOTAL / progress;
        return;
      case 1:
        while (p->phase1n < progress) {
            p->phase1n++;
            p->phase1current *= p->phase1param;
            p->phase1current /= 0x10000;
        }
        position = PHASE1START + 0x10000 - p->phase1current;
        break;
      case 2:
        while (p->phase2n < progress) {
            p->phase2n++;
            p->phase2current *= p->phase2param;
            p->phase2current /= 0x10000;
        }
        position = PHASE2START + 0x10000 - p->phase2current;
        break;
      case 3:
        position = PHASE3START + progress * p->phase3mult;
        break;
    }

    SendMessage(p->progbar, PBM_SETPOS, position / DIVISOR, 0);
}

extern char ver[];

#define PASSPHRASE_MAXLEN 512

struct PassphraseProcStruct {
    char *passphrase;
    char *comment;
};

/*
 * Dialog-box function for the passphrase box.
 */
static int CALLBACK PassphraseProc(HWND hwnd, UINT msg,
                                   WPARAM wParam, LPARAM lParam) {
    static char *passphrase;
    struct PassphraseProcStruct *p;

    switch (msg) {
      case WM_INITDIALOG:
        SetForegroundWindow(hwnd);
        SetWindowPos (hwnd, HWND_TOP, 0, 0, 0, 0,
                      SWP_NOMOVE | SWP_NOSIZE | SWP_SHOWWINDOW);
        p = (struct PassphraseProcStruct *)lParam;
        passphrase = p->passphrase;
        if (p->comment)
            SetDlgItemText(hwnd, 101, p->comment);
        *passphrase = 0;
        return 0;
      case WM_COMMAND:
	switch (LOWORD(wParam)) {
	  case IDOK:
	    if (*passphrase)
		EndDialog (hwnd, 1);
	    else
		MessageBeep (0);
	    return 0;
	  case IDCANCEL:
	    EndDialog (hwnd, 0);
	    return 0;
          case 102:                    /* edit box */
	    if (HIWORD(wParam) == EN_CHANGE) {
                GetDlgItemText (hwnd, 102, passphrase, PASSPHRASE_MAXLEN-1);
                passphrase[PASSPHRASE_MAXLEN-1] = '\0';
            }
            return 0;
	}
	return 0;
      case WM_CLOSE:
	EndDialog (hwnd, 0);
	return 0;
    }
    return 0;
}

/*
 * Prompt for a key file. Assumes the filename buffer is of size
 * FILENAME_MAX.
 */
static int prompt_keyfile(HWND hwnd, char *dlgtitle,
                          char *filename, int save) {
    OPENFILENAME of;
    memset(&of, 0, sizeof(of));
#ifdef OPENFILENAME_SIZE_VERSION_400
    of.lStructSize = OPENFILENAME_SIZE_VERSION_400;
#else
    of.lStructSize = sizeof(of);
#endif
    of.hwndOwner = hwnd;
    of.lpstrFilter = "All Files\0*\0\0\0";
    of.lpstrCustomFilter = NULL;
    of.nFilterIndex = 1;
    of.lpstrFile = filename; *filename = '\0';
    of.nMaxFile = FILENAME_MAX;
    of.lpstrFileTitle = NULL;
    of.lpstrInitialDir = NULL;
    of.lpstrTitle = dlgtitle;
    of.Flags = 0;
    if (save)
        return GetSaveFileName(&of);
    else
        return GetOpenFileName(&of);
}

/*
 * This function is needed to link with the DES code. We need not
 * have it do anything at all.
 */
void logevent(char *msg) {
}

/*
 * Dialog-box function for the Licence box.
 */
static int CALLBACK LicenceProc (HWND hwnd, UINT msg,
				 WPARAM wParam, LPARAM lParam) {
    switch (msg) {
      case WM_INITDIALOG:
	return 1;
      case WM_COMMAND:
	switch (LOWORD(wParam)) {
	  case IDOK:
            EndDialog(hwnd, 1);
	    return 0;
	}
	return 0;
      case WM_CLOSE:
	EndDialog(hwnd, 1);
	return 0;
    }
    return 0;
}

/*
 * Dialog-box function for the About box.
 */
static int CALLBACK AboutProc (HWND hwnd, UINT msg,
			       WPARAM wParam, LPARAM lParam) {
    switch (msg) {
      case WM_INITDIALOG:
        SetDlgItemText (hwnd, 100, ver);
	return 1;
      case WM_COMMAND:
	switch (LOWORD(wParam)) {
	  case IDOK:
            EndDialog(hwnd, 1);
	    return 0;
	  case 101:
	    EnableWindow(hwnd, 0);
	    DialogBox (hinst, MAKEINTRESOURCE(214), NULL, LicenceProc);
	    EnableWindow(hwnd, 1);
            SetActiveWindow(hwnd);
	    return 0;
	}
	return 0;
      case WM_CLOSE:
        EndDialog(hwnd, 1);
	return 0;
    }
    return 0;
}

/*
 * Thread to generate a key.
 */
struct rsa_key_thread_params {
    HWND progressbar;                  /* notify this with progress */
    HWND dialog;                       /* notify this on completion */
    int keysize;		       /* bits in key */
    struct RSAKey *key;
    struct RSAAux *aux;
};
static DWORD WINAPI generate_rsa_key_thread(void *param) {
    struct rsa_key_thread_params *params =
        (struct rsa_key_thread_params *)param;
    struct progress prog;
    prog.progbar = params->progressbar;

    rsa_generate(params->key, params->aux,
		 params->keysize, progress_update, &prog);

    PostMessage(params->dialog, WM_DONEKEY, 0, 0);

    free(params);
    return 0;
}

struct MainDlgState {
    int collecting_entropy;
    int generation_thread_exists;
    int key_exists;
    int entropy_got, entropy_required, entropy_size;
    int keysize;
    unsigned *entropy;
    struct RSAKey key;
    struct RSAAux aux;
};

static void hidemany(HWND hwnd, const int *ids, int hideit) {
    while (*ids) {
        ShowWindow(GetDlgItem(hwnd, *ids++), (hideit ? SW_HIDE : SW_SHOW));
    }
}

static void setupbigedit(HWND hwnd, int id, struct RSAKey *key) {
    char *buffer;
    char *dec1, *dec2;

    dec1 = bignum_decimal(key->exponent);
    dec2 = bignum_decimal(key->modulus);
    buffer = malloc(strlen(dec1)+strlen(dec2)+
                    strlen(key->comment)+30);
    sprintf(buffer, "%d %s %s %s",
            ssh1_bignum_bitcount(key->modulus),
            dec1, dec2, key->comment);
    SetDlgItemText(hwnd, id, buffer);
    free(dec1);
    free(dec2);
    free(buffer);
}

/*
 * Dialog-box function for the main PuTTYgen dialog box.
 */
static int CALLBACK MainDlgProc (HWND hwnd, UINT msg,
                                 WPARAM wParam, LPARAM lParam) {
    enum {
        controlidstart = 100,
        IDC_TITLE,
        IDC_BOX_KEY, IDC_BOXT_KEY,
        IDC_NOKEY,
        IDC_GENERATING,
        IDC_PROGRESS,
        IDC_PKSTATIC, IDC_KEYDISPLAY,
        IDC_FPSTATIC, IDC_FINGERPRINT,
        IDC_COMMENTSTATIC, IDC_COMMENTEDIT,
        IDC_PASSPHRASE1STATIC, IDC_PASSPHRASE1EDIT,
        IDC_PASSPHRASE2STATIC, IDC_PASSPHRASE2EDIT,
        IDC_BOX_ACTIONS, IDC_BOXT_ACTIONS,
        IDC_GENSTATIC, IDC_GENERATE,
        IDC_LOADSTATIC, IDC_LOAD,
        IDC_SAVESTATIC, IDC_SAVE,
        IDC_BOX_PARAMS, IDC_BOXT_PARAMS,
        IDC_BITSSTATIC, IDC_BITS,
        IDC_ABOUT,
    };
    static const int nokey_ids[] = { IDC_NOKEY, 0 };
    static const int generating_ids[] = { IDC_GENERATING, IDC_PROGRESS, 0 };
    static const int gotkey_ids[] = {
        IDC_PKSTATIC, IDC_KEYDISPLAY,
        IDC_FPSTATIC, IDC_FINGERPRINT,
        IDC_COMMENTSTATIC, IDC_COMMENTEDIT,
        IDC_PASSPHRASE1STATIC, IDC_PASSPHRASE1EDIT,
        IDC_PASSPHRASE2STATIC, IDC_PASSPHRASE2EDIT, 0 };
    static const char generating_msg[] =
        "Please wait while a key is generated...";
    static const char entropy_msg[] =
        "Please generate some randomness by moving the mouse over the blank area.";
    struct MainDlgState *state;

    switch (msg) {
      case WM_INITDIALOG:
        state = malloc(sizeof(*state));
        state->generation_thread_exists = FALSE;
        state->key_exists = FALSE;
        SetWindowLong(hwnd, GWL_USERDATA, (LONG)state);
        {
            struct ctlpos cp, cp2;

	    /* Accelerators used: acglops */

            ctlposinit(&cp, hwnd, 10, 10, 10);
            bartitle(&cp, "Public and private key generation for PuTTY",
                    IDC_TITLE);
            beginbox(&cp, "Key",
                     IDC_BOX_KEY, IDC_BOXT_KEY);
            cp2 = cp;
            statictext(&cp2, "No key.", IDC_NOKEY);
            cp2 = cp;
            statictext(&cp2, "",
                       IDC_GENERATING);
            progressbar(&cp2, IDC_PROGRESS);
            bigeditctrl(&cp,
                        "&Public key for pasting into authorized_keys file:",
                        IDC_PKSTATIC, IDC_KEYDISPLAY, 7);
            SendDlgItemMessage(hwnd, IDC_KEYDISPLAY, EM_SETREADONLY, 1, 0);
            staticedit(&cp, "Key fingerprint:", IDC_FPSTATIC,
                       IDC_FINGERPRINT, 70);
            SendDlgItemMessage(hwnd, IDC_FINGERPRINT, EM_SETREADONLY, 1, 0);
            staticedit(&cp, "Key &comment:", IDC_COMMENTSTATIC,
                       IDC_COMMENTEDIT, 70);
            staticpassedit(&cp, "Key p&assphrase:", IDC_PASSPHRASE1STATIC,
                           IDC_PASSPHRASE1EDIT, 70);
            staticpassedit(&cp, "C&onfirm passphrase:", IDC_PASSPHRASE2STATIC,
                           IDC_PASSPHRASE2EDIT, 70);
            endbox(&cp);
            beginbox(&cp, "Actions",
                     IDC_BOX_ACTIONS, IDC_BOXT_ACTIONS);
            staticbtn(&cp, "Generate a public/private key pair",
                      IDC_GENSTATIC, "&Generate", IDC_GENERATE);
            staticbtn(&cp, "Load an existing private key file",
                      IDC_LOADSTATIC, "&Load", IDC_LOAD);
            staticbtn(&cp, "Save the generated key to a new file",
                      IDC_SAVESTATIC, "&Save", IDC_SAVE);
            endbox(&cp);
            beginbox(&cp, "Parameters",
                     IDC_BOX_PARAMS, IDC_BOXT_PARAMS);
            staticedit(&cp, "Number of &bits in a generated key:",
		       IDC_BITSSTATIC, IDC_BITS, 20);
            endbox(&cp);
        }
	SetDlgItemInt(hwnd, IDC_BITS, DEFAULT_KEYSIZE, FALSE);

        /*
         * Initially, hide the progress bar and the key display,
         * and show the no-key display. Also disable the Save
         * button, because with no key we obviously can't save
         * anything.
         */
        hidemany(hwnd, nokey_ids, FALSE);
        hidemany(hwnd, generating_ids, TRUE);
        hidemany(hwnd, gotkey_ids, TRUE);
        EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 0);

	return 1;
      case WM_MOUSEMOVE:
        state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
        if (state->collecting_entropy) {
            state->entropy[state->entropy_got++] = lParam;
            state->entropy[state->entropy_got++] = GetMessageTime();
            SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS,
                               state->entropy_got, 0);
            if (state->entropy_got >= state->entropy_required) {
                struct rsa_key_thread_params *params;
                DWORD threadid;

                /*
                 * Seed the entropy pool
                 */
                random_add_heavynoise(state->entropy, state->entropy_size);
                memset(state->entropy, 0, state->entropy_size);
                free(state->entropy);

                SetDlgItemText(hwnd, IDC_GENERATING, generating_msg);
                SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETRANGE, 0,
                                   MAKELPARAM(0, PROGRESSRANGE));
                SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS, 0, 0);

                params = malloc(sizeof(*params));
                params->progressbar = GetDlgItem(hwnd, IDC_PROGRESS);
                params->dialog = hwnd;
		params->keysize = state->keysize;
                params->key = &state->key;
                params->aux = &state->aux;

                if (!CreateThread(NULL, 0, generate_rsa_key_thread,
                                  params, 0, &threadid)) {
                    MessageBox(hwnd, "Out of thread resources",
                               "Key generation error",
                               MB_OK | MB_ICONERROR);
                    free(params);
                } else {
                    state->generation_thread_exists = TRUE;
                    state->collecting_entropy = FALSE;
                }
            }
        }
        break;
      case WM_COMMAND:
	switch (LOWORD(wParam)) {
	  case IDC_COMMENTEDIT:
	    if (HIWORD(wParam) == EN_CHANGE) {
                state = (struct MainDlgState *)
                    GetWindowLong(hwnd, GWL_USERDATA);
                if (state->key_exists) {
                    HWND editctl = GetDlgItem(hwnd, IDC_COMMENTEDIT);
                    int len = GetWindowTextLength(editctl);
                    if (state->key.comment)
                        free(state->key.comment);
                    state->key.comment = malloc(len+1);
                    GetWindowText(editctl, state->key.comment, len+1);
                }                
            }
	    break;
	  case IDC_ABOUT:
	    EnableWindow(hwnd, 0);
	    DialogBox (hinst, MAKEINTRESOURCE(213), NULL, AboutProc);
	    EnableWindow(hwnd, 1);
            SetActiveWindow(hwnd);
	    return 0;
          case IDC_GENERATE:
            state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
            if (!state->generation_thread_exists) {
                hidemany(hwnd, nokey_ids, TRUE);
                hidemany(hwnd, generating_ids, FALSE);
                hidemany(hwnd, gotkey_ids, TRUE);
                EnableWindow(GetDlgItem(hwnd, IDC_GENERATE), 0);
                EnableWindow(GetDlgItem(hwnd, IDC_LOAD), 0);
                EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 0);
                state->key_exists = FALSE;
                SetDlgItemText(hwnd, IDC_GENERATING, entropy_msg);
                state->collecting_entropy = TRUE;
		{
		    BOOL ok;
		    state->keysize = GetDlgItemInt(hwnd, IDC_BITS,
						   &ok, FALSE);
		    if (!ok) state->keysize = DEFAULT_KEYSIZE;
		}

                /*
                 * My brief statistical tests on mouse movements
                 * suggest that there are about 2.5 bits of
                 * randomness in the x position, 2.5 in the y
                 * position, and 1.7 in the message time, making
                 * 5.7 bits of unpredictability per mouse movement.
                 * However, other people have told me it's far less
                 * than that, so I'm going to be stupidly cautious
                 * and knock that down to a nice round 2. With this
                 * method, we require two words per mouse movement,
                 * so with 2 bits per mouse movement we expect 2
                 * bits every 2 words.
                 */
                state->entropy_required = (state->keysize/2) * 2;
                state->entropy_got = 0;
                state->entropy_size = (state->entropy_required *
                                       sizeof(*state->entropy));
                state->entropy = malloc(state->entropy_size);

                SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETRANGE, 0,
                                   MAKELPARAM(0, state->entropy_required));
                SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS, 0, 0);
            }
            break;
          case IDC_SAVE:
            state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
            if (state->key_exists) {
                char filename[FILENAME_MAX];
                char passphrase[PASSPHRASE_MAXLEN];
                char passphrase2[PASSPHRASE_MAXLEN];
                GetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT,
                               passphrase, sizeof(passphrase));
                GetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT,
                               passphrase2, sizeof(passphrase2));
		if (strcmp(passphrase, passphrase2)) {
                    MessageBox(hwnd,
			       "The two passphrases given do not match.",
			       "PuTTYgen Error",
			       MB_OK | MB_ICONERROR);
		    break;
		}
                if (!*passphrase) {
                    int ret;
                    ret = MessageBox(hwnd,
                                     "Are you sure you want to save this key\n"
                                     "without a passphrase to protect it?",
                                     "PuTTYgen Warning",
                                     MB_YESNO | MB_ICONWARNING);
                    if (ret != IDYES)
                        break;
                }
                if (prompt_keyfile(hwnd, "Save private key as:",
                                   filename, 1)) {
		    int ret;
		    FILE *fp = fopen(filename, "r");
		    if (fp) {
			char buffer[FILENAME_MAX+80];
			fclose(fp);
			sprintf(buffer, "Overwrite existing file\n%.*s?",
				FILENAME_MAX, filename);
			ret = MessageBox(hwnd, buffer, "PuTTYgen Warning",
					 MB_YESNO | MB_ICONWARNING);
			if (ret != IDYES)
			    break;
		    }
                    ret = saversakey(filename, &state->key, &state->aux,
				     *passphrase ? passphrase : NULL);
		    if (ret <= 0) {
			MessageBox(hwnd, "Unable to save key file",
				   "PuTTYgen Error",
				   MB_OK | MB_ICONERROR);
		    }
                }
            }
            break;
          case IDC_LOAD:
            state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
            if (!state->generation_thread_exists) {
                char filename[FILENAME_MAX];
                if (prompt_keyfile(hwnd, "Load private key:",
                                   filename, 0)) {
                    char passphrase[PASSPHRASE_MAXLEN];
                    int needs_pass;
                    int ret;
                    char *comment;
                    struct PassphraseProcStruct pps;
                    struct RSAKey newkey;
                    struct RSAAux newaux;

                    needs_pass = rsakey_encrypted(filename, &comment);
                    pps.passphrase = passphrase;
                    pps.comment = comment;
                    do {
                        if (needs_pass) {
                            int dlgret;
                            dlgret = DialogBoxParam(hinst,
                                                    MAKEINTRESOURCE(210),
                                                    NULL, PassphraseProc,
                                                    (LPARAM)&pps);
                            if (!dlgret) {
                                ret = -2;
                                break;
                            }
                        } else
                            *passphrase = '\0';
                        ret = loadrsakey(filename, &newkey, &newaux,
                                         passphrase);
                    } while (ret == -1);
                    if (comment) free(comment);
                    if (ret == 0) {
                        MessageBox(NULL, "Couldn't load private key.",
                                   "PuTTYgen Error", MB_OK | MB_ICONERROR);
                    } else if (ret == 1) {
                        state->key = newkey;
                        state->aux = newaux;

                        EnableWindow(GetDlgItem(hwnd, IDC_GENERATE), 1);
                        EnableWindow(GetDlgItem(hwnd, IDC_LOAD), 1);
                        EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 1);
                        /*
                         * Now update the key controls with all the
                         * key data.
                         */
                        {
                            char buf[128];
                            SetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT,
                                           passphrase);
                            SetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT,
                                           passphrase);
                            SetDlgItemText(hwnd, IDC_COMMENTEDIT,
                                           state->key.comment);
                            /*
                             * Set the key fingerprint.
                             */
                            {
                                char *savecomment = state->key.comment;
                                state->key.comment = NULL;
                                rsa_fingerprint(buf, sizeof(buf), &state->key);
                                state->key.comment = savecomment;
                            }
                            SetDlgItemText(hwnd, IDC_FINGERPRINT, buf);
                            /*
                             * Construct a decimal representation
                             * of the key, for pasting into
                             * .ssh/authorized_keys on a Unix box.
                             */
                            setupbigedit(hwnd, IDC_KEYDISPLAY, &state->key);
                        }
                        /*
                         * Finally, hide the progress bar and show
                         * the key data.
                         */
                        hidemany(hwnd, nokey_ids, TRUE);
                        hidemany(hwnd, generating_ids, TRUE);
                        hidemany(hwnd, gotkey_ids, FALSE);
                        state->key_exists = TRUE;
                    }
                }
            }
            break;
	}
	return 0;
      case WM_DONEKEY:
        state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
        state->generation_thread_exists = FALSE;
        state->key_exists = TRUE;
        SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS, PROGRESSRANGE, 0);
        EnableWindow(GetDlgItem(hwnd, IDC_GENERATE), 1);
        EnableWindow(GetDlgItem(hwnd, IDC_LOAD), 1);
        EnableWindow(GetDlgItem(hwnd, IDC_SAVE), 1);
        /*
         * Invent a comment for the key. We'll do this by including
         * the date in it. This will be so horrifyingly ugly that
         * the user will immediately want to change it, which is
         * what we want :-)
         */
        state->key.comment = malloc(30);
        {
            time_t t;
            struct tm *tm;
            time(&t);
            tm = localtime(&t);
            strftime(state->key.comment, 30, "rsa-key-%Y%m%d", tm);
        }
            
        /*
         * Now update the key controls with all the key data.
         */
        {
            char buf[128];
            /*
             * Blank passphrase, initially. This isn't dangerous,
             * because we will warn (Are You Sure?) before allowing
             * the user to save an unprotected private key.
             */
            SetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT, "");
            SetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT, "");
            /*
             * Set the comment.
             */
            SetDlgItemText(hwnd, IDC_COMMENTEDIT, state->key.comment);
            /*
             * Set the key fingerprint.
             */
            {
                char *savecomment = state->key.comment;
                state->key.comment = NULL;
                rsa_fingerprint(buf, sizeof(buf), &state->key);
                state->key.comment = savecomment;
            }
            SetDlgItemText(hwnd, IDC_FINGERPRINT, buf);
            /*
             * Construct a decimal representation of the key, for
             * pasting into .ssh/authorized_keys on a Unix box.
             */
            setupbigedit(hwnd, IDC_KEYDISPLAY, &state->key);
        }
        /*
         * Finally, hide the progress bar and show the key data.
         */
        hidemany(hwnd, nokey_ids, TRUE);
        hidemany(hwnd, generating_ids, TRUE);
        hidemany(hwnd, gotkey_ids, FALSE);
        break;
      case WM_CLOSE:
        state = (struct MainDlgState *)GetWindowLong(hwnd, GWL_USERDATA);
        free(state);
        EndDialog(hwnd, 1);
	return 0;
    }
    return 0;
}

int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show) {
    InitCommonControls();
    hinst = inst;
    random_init();
    return DialogBox(hinst, MAKEINTRESOURCE(201), NULL, MainDlgProc) != IDOK;
}
Commit	Line	Data
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>
	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
0c2986d0	18	#define DEFAULT_KEYSIZE 1024
6e522441	19
6e522441	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 */
0c2986d0	228	int keysize; /* bits in key */
6e522441	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
0c2986d0	238	rsa_generate(params->key, params->aux,
0c2986d0	239	params->keysize, progress_update, &prog);
6e522441	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;
0c2986d0	252	int keysize;
6e522441	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,
a5470c60	296	IDC_PASSPHRASE1STATIC, IDC_PASSPHRASE1EDIT,
a5470c60	297	IDC_PASSPHRASE2STATIC, IDC_PASSPHRASE2EDIT,
6e522441	298	IDC_BOX_ACTIONS, IDC_BOXT_ACTIONS,
	299	IDC_GENSTATIC, IDC_GENERATE,
	300	IDC_LOADSTATIC, IDC_LOAD,
	301	IDC_SAVESTATIC, IDC_SAVE,
0c2986d0	302	IDC_BOX_PARAMS, IDC_BOXT_PARAMS,
0c2986d0	303	IDC_BITSSTATIC, IDC_BITS,
6e522441	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,
a5470c60	312	IDC_PASSPHRASE1STATIC, IDC_PASSPHRASE1EDIT,
a5470c60	313	IDC_PASSPHRASE2STATIC, IDC_PASSPHRASE2EDIT, 0 };
6e522441	314	static const char generating_msg[] =
	315	"Please wait while a key is generated...";
	316	static const char entropy_msg[] =
47c98e43	317	"Please generate some randomness by moving the mouse over the blank area.";
6e522441	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
a5470c60	329	/* Accelerators used: acglops */
a5470c60	330
6e522441	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);
a5470c60	351	staticpassedit(&cp, "Key p&assphrase:", IDC_PASSPHRASE1STATIC,
	352	IDC_PASSPHRASE1EDIT, 70);
	353	staticpassedit(&cp, "C&onfirm passphrase:", IDC_PASSPHRASE2STATIC,
	354	IDC_PASSPHRASE2EDIT, 70);
6e522441	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);
ec68f104	365	beginbox(&cp, "Parameters",
ec68f104	366	IDC_BOX_PARAMS, IDC_BOXT_PARAMS);
47c98e43	367	staticedit(&cp, "Number of &bits in a generated key:",
0c2986d0	368	IDC_BITSSTATIC, IDC_BITS, 20);
0c2986d0	369	endbox(&cp);
6e522441	370	}
0c2986d0	371	SetDlgItemInt(hwnd, IDC_BITS, DEFAULT_KEYSIZE, FALSE);
0c2986d0	372
6e522441	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;
0c2986d0	411	params->keysize = state->keysize;
6e522441	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;
0c2986d0	462	{
	463	BOOL ok;
	464	state->keysize = GetDlgItemInt(hwnd, IDC_BITS,
	465	&ok, FALSE);
	466	if (!ok) state->keysize = DEFAULT_KEYSIZE;
	467	}
6e522441	468
	469	/*
	470	* My brief statistical tests on mouse movements
47c98e43	471	* suggest that there are about 2.5 bits of
47c98e43	472	* randomness in the x position, 2.5 in the y
6e522441	473	* position, and 1.7 in the message time, making
47c98e43	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.
6e522441	481	*/
47c98e43	482	state->entropy_required = (state->keysize/2) * 2;
6e522441	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];
a5470c60	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	}
6e522441	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)) {
bdea0743	522	int ret;
18790478	523	FILE *fp = fopen(filename, "r");
18790478	524	if (fp) {
18790478	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	}
bdea0743	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	}
6e522441	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];
a5470c60	594	SetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT,
	595	passphrase);
	596	SetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT,
6e522441	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	*/
a5470c60	664	SetDlgItemText(hwnd, IDC_PASSPHRASE1EDIT, "");
a5470c60	665	SetDlgItemText(hwnd, IDC_PASSPHRASE2EDIT, "");
6e522441	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) {
8b8cf871	703	InitCommonControls();
6e522441	704	hinst = inst;
	705	random_init();
	706	return DialogBox(hinst, MAKEINTRESOURCE(201), NULL, MainDlgProc) != IDOK;
	707	}