puttygen.c

大名鼎鼎的远程登录软件putty的Symbian版源码

		memset(state->entropy, 0, state->entropy_size);
		sfree(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 = snew(struct rsa_key_thread_params);
		params->progressbar = GetDlgItem(hwnd, IDC_PROGRESS);
		params->dialog = hwnd;
		params->keysize = state->keysize;
		params->is_dsa = state->is_dsa;
		params->key = &state->key;
		params->dsskey = &state->dsskey;

		if (!CreateThread(NULL, 0, generate_rsa_key_thread,
				  params, 0, &threadid)) {
		    MessageBox(hwnd, "Out of thread resources",
			       "Key generation error",
			       MB_OK | MB_ICONERROR);
		    sfree(params);
		} else {
		    state->generation_thread_exists = TRUE;
		}
	    }
	}
	break;
      case WM_COMMAND:
	switch (LOWORD(wParam)) {
	  case IDC_KEYSSH1:
	  case IDC_KEYSSH2RSA:
	  case IDC_KEYSSH2DSA:
	    {
		state = (struct MainDlgState *)
		    GetWindowLong(hwnd, GWL_USERDATA);
		if (!IsDlgButtonChecked(hwnd, LOWORD(wParam)))
		    CheckRadioButton(hwnd, IDC_KEYSSH1, IDC_KEYSSH2DSA,
				     LOWORD(wParam));
		CheckMenuRadioItem(state->keymenu, IDC_KEYSSH1, IDC_KEYSSH2DSA,
				   LOWORD(wParam), MF_BYCOMMAND);
	    }
	    break;
	  case IDC_QUIT:
	    PostMessage(hwnd, WM_CLOSE, 0, 0);
	    break;
	  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->commentptr)
			sfree(*state->commentptr);
		    *state->commentptr = snewn(len + 1, char);
		    GetWindowText(editctl, *state->commentptr, len + 1);
		    if (state->ssh2) {
			setupbigedit2(hwnd, IDC_KEYDISPLAY, IDC_PKSTATIC,
				      &state->ssh2key);
		    } else {
			setupbigedit1(hwnd, IDC_KEYDISPLAY, IDC_PKSTATIC,
				      &state->key);
		    }
		}
	    }
	    break;
	  case IDC_ABOUT:
	    EnableWindow(hwnd, 0);
	    DialogBox(hinst, MAKEINTRESOURCE(213), hwnd, AboutProc);
	    EnableWindow(hwnd, 1);
	    SetActiveWindow(hwnd);
	    return 0;
	  case IDC_GIVEHELP:
            if (HIWORD(wParam) == BN_CLICKED ||
                HIWORD(wParam) == BN_DOUBLECLICKED) {
                if (help_path) {
                    WinHelp(hwnd, help_path, HELP_COMMAND,
                            (DWORD)"JI(`',`puttygen.general')");
                    requested_help = TRUE;
                }
            }
	    return 0;
	  case IDC_GENERATE:
            if (HIWORD(wParam) != BN_CLICKED &&
                HIWORD(wParam) != BN_DOUBLECLICKED)
		break;
	    state =
		(struct MainDlgState *) GetWindowLong(hwnd, GWL_USERDATA);
	    if (!state->generation_thread_exists) {
		BOOL ok;
		state->keysize = GetDlgItemInt(hwnd, IDC_BITS, &ok, FALSE);
		if (!ok)
		    state->keysize = DEFAULT_KEYSIZE;
		/* If we ever introduce a new key type, check it here! */
		state->ssh2 = !IsDlgButtonChecked(hwnd, IDC_KEYSSH1);
		state->is_dsa = IsDlgButtonChecked(hwnd, IDC_KEYSSH2DSA);
		if (state->keysize < 256) {
		    int ret = MessageBox(hwnd,
					 "PuTTYgen will not generate a key"
					 " smaller than 256 bits.\n"
					 "Key length reset to 256. Continue?",
					 "PuTTYgen Warning",
					 MB_ICONWARNING | MB_OKCANCEL);
		    if (ret != IDOK)
			break;
		    state->keysize = 256;
		    SetDlgItemInt(hwnd, IDC_BITS, 256, FALSE);
		}
		ui_set_state(hwnd, state, 1);
		SetDlgItemText(hwnd, IDC_GENERATING, entropy_msg);
		state->key_exists = FALSE;
		state->collecting_entropy = TRUE;

		/*
		 * 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(unsigned));
		state->entropy = snewn(state->entropy_required, unsigned);

		SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETRANGE, 0,
				   MAKELPARAM(0, state->entropy_required));
		SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS, 0, 0);
	    }
	    break;
	  case IDC_SAVE:
          case IDC_EXPORT_OPENSSH:
          case IDC_EXPORT_SSHCOM:
	    if (HIWORD(wParam) != BN_CLICKED)
		break;
	    state =
		(struct MainDlgState *) GetWindowLong(hwnd, GWL_USERDATA);
	    if (state->key_exists) {
		char filename[FILENAME_MAX];
		char passphrase[PASSPHRASE_MAXLEN];
		char passphrase2[PASSPHRASE_MAXLEN];
                int type, realtype;

                if (state->ssh2)
                    realtype = SSH_KEYTYPE_SSH2;
                else
                    realtype = SSH_KEYTYPE_SSH1;

                if (LOWORD(wParam) == IDC_EXPORT_OPENSSH)
                    type = SSH_KEYTYPE_OPENSSH;
                else if (LOWORD(wParam) == IDC_EXPORT_SSHCOM)
                    type = SSH_KEYTYPE_SSHCOM;
                else
                    type = realtype;

                if (type != realtype &&
                    import_target_type(type) != realtype) {
                    char msg[256];
                    sprintf(msg, "Cannot export an SSH%d key in an SSH%d"
                            " format", (state->ssh2 ? 2 : 1),
                            (state->ssh2 ? 1 : 2));
		    MessageBox(hwnd, msg,
                               "PuTTYgen Error", MB_OK | MB_ICONERROR);
		    break;
                }

		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, (type == realtype))) {
		    int ret;
		    FILE *fp = fopen(filename, "r");
		    if (fp) {
			char *buffer;
			fclose(fp);
			buffer = dupprintf("Overwrite existing file\n%s?",
					   filename);
			ret = MessageBox(hwnd, buffer, "PuTTYgen Warning",
					 MB_YESNO | MB_ICONWARNING);
			sfree(buffer);
			if (ret != IDYES)
			    break;
		    }

		    if (state->ssh2) {
			Filename fn = filename_from_str(filename);
                        if (type != realtype)
                            ret = export_ssh2(&fn, type, &state->ssh2key,
                                              *passphrase ? passphrase : NULL);
                        else
                            ret = ssh2_save_userkey(&fn, &state->ssh2key,
                                                    *passphrase ? passphrase :
                                                    NULL);
		    } else {
			Filename fn = filename_from_str(filename);
                        if (type != realtype)
                            ret = export_ssh1(&fn, type, &state->key,
                                              *passphrase ? passphrase : NULL);
                        else
                            ret = saversakey(&fn, &state->key,
                                             *passphrase ? passphrase : NULL);
		    }
		    if (ret <= 0) {
			MessageBox(hwnd, "Unable to save key file",
				   "PuTTYgen Error", MB_OK | MB_ICONERROR);
		    }
		}
	    }
	    break;
	  case IDC_SAVEPUB:
	    if (HIWORD(wParam) != BN_CLICKED)
		break;
	    state =
		(struct MainDlgState *) GetWindowLong(hwnd, GWL_USERDATA);
	    if (state->key_exists) {
		char filename[FILENAME_MAX];
		if (prompt_keyfile(hwnd, "Save public key as:",
				   filename, 1, 0)) {
		    int ret;
		    FILE *fp = fopen(filename, "r");
		    if (fp) {
			char *buffer;
			fclose(fp);
			buffer = dupprintf("Overwrite existing file\n%s?",
					   filename);
			ret = MessageBox(hwnd, buffer, "PuTTYgen Warning",
					 MB_YESNO | MB_ICONWARNING);
			sfree(buffer);
			if (ret != IDYES)
			    break;
		    }
		    if (state->ssh2) {
			ret = save_ssh2_pubkey(filename, &state->ssh2key);
		    } else {
			ret = save_ssh1_pubkey(filename, &state->key);
		    }
		    if (ret <= 0) {
			MessageBox(hwnd, "Unable to save key file",
				   "PuTTYgen Error", MB_OK | MB_ICONERROR);
		    }
		}
	    }
	    break;
	  case IDC_LOAD:
	  case IDC_IMPORT:
	    if (HIWORD(wParam) != BN_CLICKED)
		break;
	    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, LOWORD(wParam)==IDC_LOAD))
		    load_key_file(hwnd, state, filename_from_str(filename),
				  LOWORD(wParam) != IDC_LOAD);
	    }
	    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_SETRANGE, 0,
			   MAKELPARAM(0, PROGRESSRANGE));
	SendDlgItemMessage(hwnd, IDC_PROGRESS, PBM_SETPOS, PROGRESSRANGE, 0);
	if (state->ssh2) {
	    if (state->is_dsa) {
		state->ssh2key.data = &state->dsskey;
		state->ssh2key.alg = &ssh_dss;
	    } else {
		state->ssh2key.data = &state->key;
		state->ssh2key.alg = &ssh_rsa;
	    }
	    state->commentptr = &state->ssh2key.comment;
	} else {
	    state->commentptr = &state->key.comment;
	}
	/*
	 * 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->commentptr = snewn(30, char);
	{
	    time_t t;
	    struct tm *tm;
	    time(&t);
	    tm = localtime(&t);
	    if (state->is_dsa)
		strftime(*state->commentptr, 30, "dsa-key-%Y%m%d", tm);
	    else
		strftime(*state->commentptr, 30, "rsa-key-%Y%m%d", tm);
	}

	/*
	 * Now update the key controls with all the key data.
	 */
	{
	    char *savecomment;
	    /*
	     * 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->commentptr);
	    /*
	     * Set the key fingerprint.
	     */
	    savecomment = *state->commentptr;
	    *state->commentptr = NULL;
	    if (state->ssh2) {
		char *fp;
		fp = state->ssh2key.alg->fingerprint(state->ssh2key.data);
		SetDlgItemText(hwnd, IDC_FINGERPRINT, fp);
		sfree(fp);
	    } else {
		char buf[128];
		rsa_fingerprint(buf, sizeof(buf), &state->key);
		SetDlgItemText(hwnd, IDC_FINGERPRINT, buf);
	    }
	    *state->commentptr = savecomment;
	    /*
	     * Construct a decimal representation of the key, for
	     * pasting into .ssh/authorized_keys or
	     * .ssh/authorized_keys2 on a Unix box.
	     */
	    if (state->ssh2) {
		setupbigedit2(hwnd, IDC_KEYDISPLAY,
			      IDC_PKSTATIC, &state->ssh2key);
	    } else {
		setupbigedit1(hwnd, IDC_KEYDISPLAY,
			      IDC_PKSTATIC, &state->key);
	    }
	}
	/*
	 * Finally, hide the progress bar and show the key data.
	 */
	ui_set_state(hwnd, state, 2);
	break;
      case WM_HELP:
        if (help_path) {
            int id = ((LPHELPINFO)lParam)->iCtrlId;
            char *cmd = NULL;
            switch (id) {
              case IDC_GENERATING:
              case IDC_PROGRESS:
              case IDC_GENSTATIC:
              case IDC_GENERATE:
                cmd = "JI(`',`puttygen.generate')"; break;
              case IDC_PKSTATIC:
              case IDC_KEYDISPLAY:
                cmd = "JI(`',`puttygen.pastekey')"; break;
              case IDC_FPSTATIC:
              case IDC_FINGERPRINT:
                cmd = "JI(`',`puttygen.fingerprint')"; break;
              case IDC_COMMENTSTATIC:
              case IDC_COMMENTEDIT:
                cmd = "JI(`',`puttygen.comment')"; break;
              case IDC_PASSPHRASE1STATIC:
              case IDC_PASSPHRASE1EDIT:
              case IDC_PASSPHRASE2STATIC:
              case IDC_PASSPHRASE2EDIT:
                cmd = "JI(`',`puttygen.passphrase')"; break;
              case IDC_LOADSTATIC:
              case IDC_LOAD:
                cmd = "JI(`',`puttygen.load')"; break;
              case IDC_SAVESTATIC:
              case IDC_SAVE:
                cmd = "JI(`',`puttygen.savepriv')"; break;
              case IDC_SAVEPUB:
                cmd = "JI(`',`puttygen.savepub')"; break;
              case IDC_TYPESTATIC:
              case IDC_KEYSSH1:
              case IDC_KEYSSH2RSA:
              case IDC_KEYSSH2DSA:
                cmd = "JI(`',`puttygen.keytype')"; break;
              case IDC_BITSSTATIC:
              case IDC_BITS:
                cmd = "JI(`',`puttygen.bits')"; break;
              case IDC_IMPORT:
              case IDC_EXPORT_OPENSSH:
              case IDC_EXPORT_SSHCOM:
                cmd = "JI(`',`puttygen.conversions')"; break;
            }
            if (cmd) {
                WinHelp(hwnd, help_path, HELP_COMMAND, (DWORD)cmd);
                requested_help = TRUE;
            } else {
                MessageBeep(0);
            }
        }
        break;
      case WM_CLOSE:
	state = (struct MainDlgState *) GetWindowLong(hwnd, GWL_USERDATA);
	sfree(state);
        if (requested_help) {
            WinHelp(hwnd, help_path, HELP_QUIT, 0);
            requested_help = FALSE;
        }
	EndDialog(hwnd, 1);
	return 0;
    }
    return 0;
}

void cleanup_exit(int code) { exit(code); }

int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show)
{
    int argc;
    char **argv;

    split_into_argv(cmdline, &argc, &argv, NULL);

    if (argc > 0) {
	/*
	 * Assume the first argument to be a private key file, and
	 * attempt to load it.
	 */
	cmdline_keyfile = argv[0];
    }

    InitCommonControls();
    hinst = inst;

    /*
     * See if we can find our Help file.
     */
    {
        char b[2048], *p, *q, *r;
        FILE *fp;
        GetModuleFileName(NULL, b, sizeof(b) - 1);
        r = b;
        p = strrchr(b, '\\');
        if (p && p >= r) r = p+1;
        q = strrchr(b, ':');
        if (q && q >= r) r = q+1;
        strcpy(r, "putty.hlp");
        if ( (fp = fopen(b, "r")) != NULL) {
            help_path = dupstr(b);
            fclose(fp);
        } else
            help_path = NULL;
    }

    random_init();
    return DialogBox(hinst, MAKEINTRESOURCE(201), NULL,
		     MainDlgProc) != IDOK;
}