[sgt/putty] / puttygen.c

/*
 * PuTTY key generation front end.
 */

#include <windows.h>
#include <commctrl.h>
#include <time.h>
#include <stdio.h>
#include <stdlib.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->collecting_entropy = FALSE;
        state->entropy = NULL;
        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 < state->entropy_required) {
            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);
                state->collecting_entropy = FALSE;

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