ttssh2/ttxssh/ttxssh.c

/*
Copyright (c) 1998-2001, Robert O'Callahan
All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of
conditions and the following disclaimer.

Redistributions in binary form must reproduce the above copyright notice, this list
of conditions and the following disclaimer in the documentation and/or other materials
provided with the distribution.

The name of Robert O'Callahan may not be used to endorse or promote products derived from
this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/* Teraterm extension mechanism
   Robert O'Callahan (roc+tt@cs.cmu.edu)
   
   Teraterm by Takashi Teranishi (teranishi@rikaxp.riken.go.jp)
*/

#include "ttxssh.h"
#include "fwdui.h"
#include "util.h"
#include "ssh.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <io.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <time.h>

#include "resource.h"
#include <commctrl.h>
#include <commdlg.h>
#ifdef INET6
#include <winsock2.h>
static char FAR *ProtocolFamilyList[] = { "UNSPEC", "IPv6", "IPv4", NULL };
#else
#include <winsock.h>
#endif                                                  /* INET6 */

#include <Lmcons.h>

// include OpenSSL header file
#include <openssl/opensslv.h>
#include <openssl/evp.h>
#include <openssl/rsa.h>
#include <openssl/dsa.h>
#include <openssl/bn.h>
#include <openssl/pem.h>
#include <openssl/rand.h>
#include <openssl/rc4.h>
#include <openssl/md5.h>

// include ZLib header file
#include <zlib.h>

#include "buffer.h"
#include "cipher.h"


#define MATCH_STR(s, o) strncmp((s), (o), NUM_ELEM(o) - 1)
#define MATCH_STR_I(s, o) _strnicmp((s), (o), NUM_ELEM(o) - 1)

/* This extension implements SSH, so we choose a load order in the
   "protocols" range. */
#define ORDER 2500

#ifdef TERATERM32
static HICON SecureLargeIcon = NULL;
static HICON SecureSmallIcon = NULL;
#endif

#ifdef I18N
static HFONT DlgHostFont;
static HFONT DlgAboutFont;
static HFONT DlgSetupFont;
static HFONT DlgKeygenFont;
#endif

static TInstVar FAR *pvar;

#ifdef TERATERM32
  /* WIN32 allows multiple instances of a DLL */
static TInstVar InstVar;
#define GET_VAR()
#else
  /* WIN16 does not allow multiple instances of a DLL */

  /* maximum number of Tera Term instances */
#define MAXNUMINST 32
  /* list of task handles for Tera Term instances */
static HANDLE FAR TaskList[MAXNUMINST];
  /* variable sets for instances */
static TInstVar FAR *FAR InstVar[MAXNUMINST];

/* Here's how the TS settings work.
   Whenever the TS settings are read or written to the INI file, then
   the shared memory containing those settings is updated.
   When Teraterm starts, the shared memory is read to initialize the TS
   settings. */

  /* TS settings shared across instances */
static TS_SSH ts_SSH_settings;


extern void SSH2_update_cipher_myproposal(PTInstVar pvar);


static BOOL NewVar()
{
        int i = 0;
        HANDLE Task = GetCurrentTask();

        if (TaskList[0] == NULL)

                if (Task == NULL)
                        return FALSE;
        while ((i < MAXNUMINST) && (TaskList[i] != NULL))
                i++;
        if (i >= MAXNUMINST)
                return FALSE;
        pvar = (TInstVar FAR *) malloc(sizeof(TInstVar));
        InstVar[i] = pvar;
        TaskList[i] = Task;
        return TRUE;
}

void DelVar()
{
        int i = 0;
        HANDLE Task = GetCurrentTask();

        if (Task == NULL)
                return;
        while ((i < MAXNUMINST) && (TaskList[i] != Task))
                i++;
        if (i >= MAXNUMINST)
                return;
        free(TaskList[i]);
        TaskList[i] = NULL;
}

BOOL GetVar()
{
        int i = 0;
        HANDLE Task = GetCurrentTask();

        if (Task == NULL)
                return FALSE;
        while ((i < MAXNUMINST) && (TaskList[i] != Task))
                i++;
        if (i >= MAXNUMINST)
                return FALSE;
        pvar = InstVar[i];
        return TRUE;
}

#define GET_VAR() if (!GetVar()) return
#endif

/*
This code makes lots of assumptions about the order in which Teraterm
does things, and how. A key assumption is that the Notification window
passed into WSAAsyncSelect is the main terminal window. We also assume
that the socket used in the first WSAconnect is the main session socket.
*/

static void init_TTSSH(PTInstVar pvar)
{
        pvar->socket = INVALID_SOCKET;
        pvar->OldLargeIcon = NULL;
        pvar->OldSmallIcon = NULL;
        pvar->NotificationWindow = NULL;
        pvar->hostdlg_activated = FALSE;
        pvar->socket = INVALID_SOCKET;
        pvar->NotificationWindow = NULL;
        pvar->protocol_major = 0;
        pvar->protocol_minor = 0;

        PKT_init(pvar);
        SSH_init(pvar);
        CRYPT_init(pvar);
        AUTH_init(pvar);
        HOSTS_init(pvar);
        FWD_init(pvar);
        FWDUI_init(pvar);

        ssh_heartbeat_lock_initialize();
}

static void uninit_TTSSH(PTInstVar pvar)
{
        halt_ssh_heartbeat_thread(pvar);

        ssh2_channel_free();

        SSH_end(pvar);
        PKT_end(pvar);
        AUTH_end(pvar);
        CRYPT_end(pvar);
        HOSTS_end(pvar);
        FWD_end(pvar);
        FWDUI_end(pvar);

        if (pvar->OldLargeIcon != NULL) {
                PostMessage(pvar->NotificationWindow, WM_SETICON, ICON_BIG,
                                        (LPARAM) pvar->OldLargeIcon);
                pvar->OldLargeIcon = NULL;
        }
        if (pvar->OldSmallIcon != NULL) {
                PostMessage(pvar->NotificationWindow, WM_SETICON, ICON_SMALL,
                                        (LPARAM) pvar->OldSmallIcon);
                pvar->OldSmallIcon = NULL;
        }

        ssh_heartbeat_lock_finalize();
}

static void PASCAL FAR TTXInit(PTTSet ts, PComVar cv)
{
#ifndef TERATERM32
        if (!NewVar())
                return;                                 /* should be called first */
        pvar->ts_SSH = &ts_SSH_settings;
#endif
        pvar->settings = *pvar->ts_SSH;
        pvar->ts = ts;
        pvar->cv = cv;
        pvar->fatal_error = FALSE;
        pvar->showing_err = FALSE;
        pvar->err_msg = NULL;

        init_TTSSH(pvar);
}

static void normalize_cipher_order(char FAR * buf)
{
        char ciphers_listed[SSH_CIPHER_MAX + 1];
        char ciphers_allowed[SSH_CIPHER_MAX + 1];
        int i, j;

        /* SSH_CIPHER_NONE means that all ciphers below that one are disabled.
           We *never* allow no encryption. */
#if 0
        static char default_ciphers[] = {
                SSH_CIPHER_3DES,
                SSH_CIPHER_NONE,
                SSH_CIPHER_DES, SSH_CIPHER_BLOWFISH
        };
#else
        // for SSH2(yutaka)
        static char default_ciphers[] = {
                SSH_CIPHER_AES128,
                SSH_CIPHER_3DES_CBC,
                SSH_CIPHER_3DES,
                SSH_CIPHER_NONE,
                SSH_CIPHER_DES, SSH_CIPHER_BLOWFISH
        };
#endif

        memset(ciphers_listed, 0, sizeof(ciphers_listed));

        memset(ciphers_allowed, 0, sizeof(ciphers_allowed));
        for (i = 0; i < NUM_ELEM(default_ciphers); i++) {
                ciphers_allowed[default_ciphers[i]] = 1;
        }

        for (i = 0; buf[i] != 0; i++) {
                int cipher_num = buf[i] - '0';

                if (cipher_num < 0 || cipher_num > SSH_CIPHER_MAX
                        || !ciphers_allowed[cipher_num]
                        || ciphers_listed[cipher_num]) {
                        memmove(buf + i, buf + i + 1, strlen(buf + i + 1) + 1);
                        i--;
                } else {
                        ciphers_listed[cipher_num] = 1;
                }
        }

        for (j = 0; j < NUM_ELEM(default_ciphers); j++) {
                int cipher_num = default_ciphers[j];

                if (!ciphers_listed[cipher_num]) {
                        buf[i] = cipher_num + '0';
                        i++;
                }
        }

        buf[i] = 0;
}

/* Remove local settings from the shared memory block. */
static void clear_local_settings(PTInstVar pvar)
{
        pvar->ts_SSH->TryDefaultAuth = FALSE;
}

static BOOL read_BOOL_option(PCHAR fileName, char FAR * keyName, BOOL def)
{
        char buf[1024];

        buf[0] = 0;
        GetPrivateProfileString("TTSSH", keyName, "", buf, sizeof(buf),
                                                        fileName);
        if (buf[0] == 0) {
                return def;
        } else {
                return atoi(buf) != 0 ||
                        _stricmp(buf, "yes") == 0 || _stricmp(buf, "y") == 0;
        }
}

static void read_string_option(PCHAR fileName, char FAR * keyName,
                                                           char FAR * def, char FAR * buf, int bufSize)
{

        buf[0] = 0;
        GetPrivateProfileString("TTSSH", keyName, def, buf, bufSize, fileName);
}

static void read_ssh_options(PTInstVar pvar, PCHAR fileName)
{
        char buf[1024];
        TS_SSH FAR *settings = pvar->ts_SSH;

#define READ_STD_STRING_OPTION(name) \
  read_string_option(fileName, #name, "", settings->name, sizeof(settings->name))

        settings->Enabled = read_BOOL_option(fileName, "Enabled", FALSE);

        buf[0] = 0;
        GetPrivateProfileString("TTSSH", "Compression", "", buf, sizeof(buf),
                                                        fileName);
        settings->CompressionLevel = atoi(buf);
        if (settings->CompressionLevel < 0 || settings->CompressionLevel > 9) {
                settings->CompressionLevel = 0;
        }

        READ_STD_STRING_OPTION(DefaultUserName);
        READ_STD_STRING_OPTION(DefaultForwarding);
        READ_STD_STRING_OPTION(DefaultRhostsLocalUserName);
        READ_STD_STRING_OPTION(DefaultRhostsHostPrivateKeyFile);
        READ_STD_STRING_OPTION(DefaultRSAPrivateKeyFile);

        READ_STD_STRING_OPTION(CipherOrder);
        normalize_cipher_order(settings->CipherOrder);

        read_string_option(fileName, "KnownHostsFiles", "ssh_known_hosts",
                                           settings->KnownHostsFiles,
                                           sizeof(settings->KnownHostsFiles));

        buf[0] = 0;
        GetPrivateProfileString("TTSSH", "DefaultAuthMethod", "", buf,
                                                        sizeof(buf), fileName);
        settings->DefaultAuthMethod = atoi(buf);
        if (settings->DefaultAuthMethod != SSH_AUTH_PASSWORD
                && settings->DefaultAuthMethod != SSH_AUTH_RSA
                && settings->DefaultAuthMethod != SSH_AUTH_TIS  // add (2005.3.12 yutaka)
                && settings->DefaultAuthMethod != SSH_AUTH_RHOSTS) {
                /* this default can never be SSH_AUTH_RHOSTS_RSA because that is not a
                   selection in the dialog box; SSH_AUTH_RHOSTS_RSA is automatically chosen
                   when the dialog box has rhosts selected and an host private key file
                   is supplied. */
                settings->DefaultAuthMethod = SSH_AUTH_PASSWORD;
        }

        buf[0] = 0;
        GetPrivateProfileString("TTSSH", "LogLevel", "", buf, sizeof(buf),
                                                        fileName);
        settings->LogLevel = atoi(buf);

        buf[0] = 0;
        GetPrivateProfileString("TTSSH", "WriteBufferSize", "", buf,
                                                        sizeof(buf), fileName);
        settings->WriteBufferSize = atoi(buf);
        if (settings->WriteBufferSize <= 0) {
                settings->WriteBufferSize = 2 * 1024 * 1024;
        }

        settings->LocalForwardingIdentityCheck =
                read_BOOL_option(fileName, "LocalForwardingIdentityCheck", TRUE);

        // SSH protocol version (2004.10.11 yutaka)
        // default is SSH2 (2004.11.30 yutaka)
        settings->ssh_protocol_version = GetPrivateProfileInt("TTSSH", "ProtocolVersion", 2, fileName);

        // SSH heartbeat time(second) (2004.12.11 yutaka)
        settings->ssh_heartbeat_overtime = GetPrivateProfileInt("TTSSH", "HeartBeat", 60, fileName);

        // SSH2 keyboard-interactive (2005.1.23 yutaka)
        // �f�t�H���g���������������BOpenSSH 4.0����keyboard-interactive���\�b�h�����`�������������������A
        // ���Y���\�b�h���g�����R�l�N�V���������������������B(2005.3.12 yutaka)
        settings->ssh2_keyboard_interactive = GetPrivateProfileInt("TTSSH", "KeyboardInteractive", 0, fileName);

        // �p�X���[�h�F�����������J���F�����g���p�X���[�h����������������������������������
        // �\���B(2006.8.5 yutaka)
        settings->remember_password = GetPrivateProfileInt("TTSSH", "RememberPassword", 1, fileName);

        clear_local_settings(pvar);
}

static void write_ssh_options(PTInstVar pvar, PCHAR fileName,
                                                          TS_SSH FAR * settings, BOOL copy_forward)
{
        char buf[1024];

        WritePrivateProfileString("TTSSH", "Enabled",
                                                          settings->Enabled ? "1" : "0", fileName);

        _itoa(settings->CompressionLevel, buf, 10);
        WritePrivateProfileString("TTSSH", "Compression", buf, fileName);

        WritePrivateProfileString("TTSSH", "DefaultUserName",
                                                          settings->DefaultUserName, fileName);

        if (copy_forward) {
                WritePrivateProfileString("TTSSH", "DefaultForwarding",
                                                                  settings->DefaultForwarding, fileName);
        }

        WritePrivateProfileString("TTSSH", "CipherOrder",
                                                          settings->CipherOrder, fileName);

        WritePrivateProfileString("TTSSH", "KnownHostsFiles",
                                                          settings->KnownHostsFiles, fileName);

        WritePrivateProfileString("TTSSH", "DefaultRhostsLocalUserName",
                                                          settings->DefaultRhostsLocalUserName,
                                                          fileName);

        WritePrivateProfileString("TTSSH", "DefaultRhostsHostPrivateKeyFile",
                                                          settings->DefaultRhostsHostPrivateKeyFile,
                                                          fileName);

        WritePrivateProfileString("TTSSH", "DefaultRSAPrivateKeyFile",
                                                          settings->DefaultRSAPrivateKeyFile,
                                                          fileName);

        _itoa(settings->DefaultAuthMethod, buf, 10);
        WritePrivateProfileString("TTSSH", "DefaultAuthMethod", buf, fileName);

        _itoa(settings->LogLevel, buf, 10);
        WritePrivateProfileString("TTSSH", "LogLevel", buf, fileName);

        _itoa(settings->WriteBufferSize, buf, 10);
        WritePrivateProfileString("TTSSH", "WriteBufferSize", buf, fileName);

        WritePrivateProfileString("TTSSH", "LocalForwardingIdentityCheck",
                                                          settings->
                                                          LocalForwardingIdentityCheck ? "1" : "0",
                                                          fileName);

        // SSH protocol version (2004.10.11 yutaka)
        WritePrivateProfileString("TTSSH", "ProtocolVersion",
                settings->ssh_protocol_version==2 ? "2" : "1",
                fileName);

        // SSH heartbeat time(second) (2004.12.11 yutaka)
        _snprintf(buf, sizeof(buf), "%d", settings->ssh_heartbeat_overtime);
        WritePrivateProfileString("TTSSH", "HeartBeat", buf, fileName);

        // SSH2 keyboard-interactive (2005.1.23 yutaka)
        WritePrivateProfileString("TTSSH", "KeyboardInteractive", 
                settings->ssh2_keyboard_interactive ? "1" : "0", 
                fileName);

        // Remember password (2006.8.5 yutaka)
        WritePrivateProfileString("TTSSH", "RememberPassword", 
                settings->remember_password ? "1" : "0", 
                fileName);
}


/* find free port in all protocol family */
static unsigned short find_local_port(PTInstVar pvar)
{
        int tries;
#ifdef INET6
        SOCKET connecter;
        struct addrinfo hints;
        struct addrinfo FAR *res;
        struct addrinfo FAR *res0;
        unsigned short port;
        char pname[NI_MAXHOST];
#endif                                                  /* INET6 */

        if (pvar->session_settings.DefaultAuthMethod != SSH_AUTH_RHOSTS) {
                return 0;
        }

        /* The random numbers here are only used to try to get fresh
           ports across runs (dangling ports can cause bind errors
           if we're unlucky). They do not need to be (and are not)
           cryptographically strong.
         */
        srand((unsigned) GetTickCount());

#ifdef INET6
        for (tries = 20; tries > 0; tries--) {
                memset(&hints, 0, sizeof(hints));
                hints.ai_family = pvar->ts->ProtocolFamily;
                hints.ai_flags = AI_PASSIVE;
                hints.ai_socktype = SOCK_STREAM;
                port = (unsigned) rand() % 512 + 512;
                _snprintf(pname, sizeof(pname), "%d", (int) port);
                if (getaddrinfo(NULL, pname, &hints, &res0)) {
                        return 0;
                        /* NOT REACHED */
                }

                for (res = res0; res; res = res->ai_next) {
                        if (res->ai_family == AF_INET || res->ai_family == AF_INET6)
                                continue;

                        connecter =
                                socket(res->ai_family, res->ai_socktype, res->ai_protocol);
                        if (connecter == INVALID_SOCKET) {
                                freeaddrinfo(res0);
                                return 0;
                        }

                        if (bind(connecter, res->ai_addr, res->ai_addrlen) !=
                                SOCKET_ERROR) {
                                return port;
                                freeaddrinfo(res0);
                                closesocket(connecter);
                        } else if (WSAGetLastError() != WSAEADDRINUSE) {
                                closesocket(connecter);
                                freeaddrinfo(res0);
                                return 0;
                        }

                        closesocket(connecter);
                }
                freeaddrinfo(res0);
        }

        return 0;
#else
        for (tries = 20; tries > 0; tries--) {
                SOCKET connecter = socket(AF_INET, SOCK_STREAM, 0);
                struct sockaddr_in connecter_addr;

                connecter_addr.sin_family = AF_INET;
                connecter_addr.sin_port = (unsigned) rand() % 512 + 512;
                connecter_addr.sin_addr.s_addr = htonl(INADDR_ANY);

                if (connecter == INVALID_SOCKET) {
                        return 0;
                }

                if (bind
                        (connecter, (struct sockaddr FAR *) &connecter_addr,
                         sizeof(connecter_addr)) != SOCKET_ERROR) {
                        closesocket(connecter);
                        return connecter_addr.sin_port;
                } else if (WSAGetLastError() != WSAEADDRINUSE) {
                        closesocket(connecter);
                        return 0;
                }

                closesocket(connecter);
        }

        return 0;
#endif                                                  /* INET6 */
}

static int PASCAL FAR TTXconnect(SOCKET s,
                                                                 const struct sockaddr FAR * name,
                                                                 int namelen)
{
        GET_VAR();

#ifdef INET6
        if (pvar->socket == INVALID_SOCKET) {
                struct sockaddr_storage ss;
                int len;

                pvar->socket = s;

                memset(&ss, 0, sizeof(ss));
                switch (pvar->ts->ProtocolFamily) {
                case AF_INET:
                        len = sizeof(struct sockaddr_in);
                        ((struct sockaddr_in FAR *) &ss)->sin_family = AF_INET;
                        ((struct sockaddr_in FAR *) &ss)->sin_addr.s_addr = INADDR_ANY;
                        ((struct sockaddr_in FAR *) &ss)->sin_port =
                                htons(find_local_port(pvar));
                        break;
                case AF_INET6:
                        len = sizeof(struct sockaddr_in6);
                        ((struct sockaddr_in6 FAR *) &ss)->sin6_family = AF_INET6;
#if 0                                                   /* symbol "in6addr_any" is not included in wsock32.lib */
                        /* if wsock32.lib will be linked, we can't refer "in6addr_any" */
                        ((struct sockaddr_in6 FAR *) &ss)->sin6_addr = in6addr_any;
#eles
                        memset(&((struct sockaddr_in6 FAR *) &ss)->sin6_addr, 0,
                                   sizeof(struct in_addr6));
#endif                                                  /* 0 */
                        ((struct sockaddr_in6 FAR *) &ss)->sin6_port =
                                htons(find_local_port(pvar));
                        break;
                default:
                        /* NOT REACHED */
                        break;
                }

                bind(s, (struct sockaddr FAR *) &ss, len);
        }
#else
        if (pvar->socket == INVALID_SOCKET) {
                struct sockaddr_in addr;

                pvar->socket = s;

                addr.sin_family = AF_INET;
                addr.sin_port = htons(find_local_port(pvar));
                addr.sin_addr.s_addr = INADDR_ANY;
                memset(addr.sin_zero, 0, sizeof(addr.sin_zero));

                bind(s, (struct sockaddr FAR *) &addr, sizeof(addr));
        }
#endif                                                  /* INET6 */

        return (pvar->Pconnect) (s, name, namelen);
}

static int PASCAL FAR TTXWSAAsyncSelect(SOCKET s, HWND hWnd, u_int wMsg,
                                                                                long lEvent)
{
        GET_VAR();

        if (s == pvar->socket) {
                pvar->notification_events = lEvent;
                pvar->notification_msg = wMsg;

                if (pvar->NotificationWindow == NULL) {
                        pvar->NotificationWindow = hWnd;
                        AUTH_advance_to_next_cred(pvar);
                }
        }

        return (pvar->PWSAAsyncSelect) (s, hWnd, wMsg, lEvent);
}

static int PASCAL FAR TTXrecv(SOCKET s, char FAR * buf, int len, int flags)
{
        GET_VAR();

        if (s == pvar->socket) {
                int ret;

                ssh_heartbeat_lock();
                ret = PKT_recv(pvar, buf, len);
                ssh_heartbeat_unlock();
                return (ret);

        } else {
                return (pvar->Precv) (s, buf, len, flags);
        }
}

static int PASCAL FAR TTXsend(SOCKET s, char const FAR * buf, int len,
                                                          int flags)
{
        GET_VAR();

        if (s == pvar->socket) {
                ssh_heartbeat_lock();
                SSH_send(pvar, buf, len);
                ssh_heartbeat_unlock();
                return len;
        } else {
                return (pvar->Psend) (s, buf, len, flags);
        }
}

void notify_established_secure_connection(PTInstVar pvar)
{
#ifdef TERATERM32
        // LoadIcon �������� LoadImage ���g�����������A
        // 16x16 ���A�C�R���������I�������������������� (2006.8.9 maya)
        if (SecureLargeIcon == NULL) {
                SecureLargeIcon = LoadImage(hInst, MAKEINTRESOURCE(IDI_SECURETT),
                                                                        IMAGE_ICON, 0, 0, LR_DEFAULTCOLOR);
        }
        if (SecureSmallIcon == NULL) {
                SecureSmallIcon = LoadImage(hInst, MAKEINTRESOURCE(IDI_SECURETT),
                                                                        IMAGE_ICON, 16, 16, LR_DEFAULTCOLOR);
        }

        if (SecureLargeIcon != NULL && SecureSmallIcon != NULL) {
                // �������A�C�R���� WNDCLASS ���Z�b�g�����������������o���������� (2006.8.10 maya)
                pvar->OldLargeIcon =
                        (HICON) GetClassLong(pvar->NotificationWindow, GCL_HICON);
                pvar->OldSmallIcon =
                        (HICON) SendMessage(pvar->NotificationWindow, WM_GETICON,
                                                                ICON_SMALL, 0);

                PostMessage(pvar->NotificationWindow, WM_SETICON, ICON_BIG,
                                        (LPARAM) SecureLargeIcon);
                PostMessage(pvar->NotificationWindow, WM_SETICON, ICON_SMALL,
                                        (LPARAM) SecureSmallIcon);
        }
#endif

        notify_verbose_message(pvar, "Entering secure mode",
                                                   LOG_LEVEL_VERBOSE);
}

void notify_closed_connection(PTInstVar pvar)
{
        SSH_notify_disconnecting(pvar, NULL);
        AUTH_notify_disconnecting(pvar);
        HOSTS_notify_disconnecting(pvar);

        PostMessage(pvar->NotificationWindow, WM_USER_COMMNOTIFY,
                                pvar->socket, MAKELPARAM(FD_CLOSE, 0));

}

static void add_err_msg(PTInstVar pvar, char FAR * msg)
{
        if (pvar->err_msg != NULL) {
                char FAR *buf =
                        (char FAR *) malloc(strlen(pvar->err_msg) + 3 + strlen(msg));

                strcpy(buf, pvar->err_msg);
                strcat(buf, "\n\n");
                strcat(buf, msg);
                free(pvar->err_msg);
                pvar->err_msg = buf;
        } else {
                pvar->err_msg = _strdup(msg);
        }
}

void notify_nonfatal_error(PTInstVar pvar, char FAR * msg)
{
        if (!pvar->showing_err) {
                // �������������������m���E�B���h�E�����������A�f�X�N�g�b�v���I�[�i�[������
                // ���b�Z�[�W�{�b�N�X���o���������B(2006.6.11 yutaka)
                if (pvar->NotificationWindow == NULL) {
#ifdef I18N
                        strcpy(pvar->ts->UIMsg, "Tera Term: not fatal error");
                        UTIL_get_lang_msg("MSG_ERROR_NONFAITAL", pvar);
                        MessageBox(NULL, msg, pvar->ts->UIMsg, MB_OK|MB_ICONINFORMATION);
#else
                        MessageBox(NULL, msg, "Tera Term: not fatal error", MB_OK|MB_ICONINFORMATION);
#endif
                        msg[0] = '\0';

                } else {
                        PostMessage(pvar->NotificationWindow, WM_COMMAND,
                                                ID_SSHASYNCMESSAGEBOX, 0);
                }
        }
        if (msg[0] != 0) {
                notify_verbose_message(pvar, msg, LOG_LEVEL_ERROR);
                add_err_msg(pvar, msg);
        }
}

void notify_fatal_error(PTInstVar pvar, char FAR * msg)
{
        if (msg[0] != 0) {
                notify_verbose_message(pvar, msg, LOG_LEVEL_FATAL);
                add_err_msg(pvar, msg);
        }

        if (!pvar->fatal_error) {
                pvar->fatal_error = TRUE;

                SSH_notify_disconnecting(pvar, msg);
                AUTH_notify_disconnecting(pvar);
                HOSTS_notify_disconnecting(pvar);

                PostMessage(pvar->NotificationWindow, WM_USER_COMMNOTIFY,
                                        pvar->socket, MAKELPARAM(FD_CLOSE,
                                                                                         (pvar->PWSAGetLastError) ()));
        }
}

void notify_verbose_message(PTInstVar pvar, char FAR * msg, int level)
{
        if (level <= pvar->session_settings.LogLevel) {
                char buf[1024];
                int file;

                get_teraterm_dir_relative_name(buf, NUM_ELEM(buf), "TTSSH.LOG");
                file = _open(buf, _O_RDWR | _O_APPEND | _O_CREAT | _O_TEXT,
                                         _S_IREAD | _S_IWRITE);

                if (file >= 0) {
                        _write(file, msg, strlen(msg));
                        _write(file, "\n", 1);
                        _close(file);
                }
        }
}

static void PASCAL FAR TTXOpenTCP(TTXSockHooks FAR * hooks)
{
        GET_VAR();

        if (pvar->settings.Enabled) {
                char buf[1024] = "\n---------------------------------------------------------------------\nInitiating SSH session at ";
                struct tm FAR *newtime;
                time_t long_time;

                pvar->session_settings = pvar->settings;

                time(&long_time);
                newtime = localtime(&long_time);
                strcat(buf, asctime(newtime));
                buf[strlen(buf) - 1] = 0;
                notify_verbose_message(pvar, buf, LOG_LEVEL_VERBOSE);

                FWDUI_load_settings(pvar);

                pvar->cv->TelAutoDetect = FALSE;
                /* This next line should not be needed because Teraterm's
                   CommLib should find ts->Telnet == 0 ... but we'll do this
                   just to be on the safe side. */
                pvar->cv->TelFlag = FALSE;

                pvar->Precv = *hooks->Precv;
                pvar->Psend = *hooks->Psend;
                pvar->PWSAAsyncSelect = *hooks->PWSAAsyncSelect;
                pvar->Pconnect = *hooks->Pconnect;
                pvar->PWSAGetLastError = *hooks->PWSAGetLastError;

                *hooks->Precv = TTXrecv;
                *hooks->Psend = TTXsend;
                *hooks->PWSAAsyncSelect = TTXWSAAsyncSelect;
                *hooks->Pconnect = TTXconnect;

                SSH_open(pvar);
                HOSTS_open(pvar);
                FWDUI_open(pvar);

                // ������ myproposal �����f���������A�������O�����������B (2006.6.26 maya)
                SSH2_update_cipher_myproposal(pvar);
                SSH2_update_compression_myproposal(pvar);
        }
}

static void PASCAL FAR TTXCloseTCP(TTXSockHooks FAR * hooks)
{
        GET_VAR();

        if (pvar->session_settings.Enabled) {
                pvar->socket = INVALID_SOCKET;

                notify_verbose_message(pvar, "Terminating SSH session...",
                                                           LOG_LEVEL_VERBOSE);

                *hooks->Precv = pvar->Precv;
                *hooks->Psend = pvar->Psend;
                *hooks->PWSAAsyncSelect = pvar->PWSAAsyncSelect;
                *hooks->Pconnect = pvar->Pconnect;
        }

        uninit_TTSSH(pvar);
        init_TTSSH(pvar);
}

static void enable_dlg_items(HWND dlg, int from, int to, BOOL enabled)
{
        for (; from <= to; from++) {
                EnableWindow(GetDlgItem(dlg, from), enabled);
        }
}

static BOOL CALLBACK TTXHostDlg(HWND dlg, UINT msg, WPARAM wParam,
                                                                LPARAM lParam)
{
        static char *ssh_version[] = {"SSH1", "SSH2", NULL};
        PGetHNRec GetHNRec;
        char EntName[7];
        char TempHost[HostNameMaxLength + 1];
        WORD i, j, w;
        BOOL Ok;
#ifdef I18N
        LOGFONT logfont;
        HFONT font;
#endif

        GET_VAR();

        switch (msg) {
        case WM_INITDIALOG:
                GetHNRec = (PGetHNRec) lParam;
                SetWindowLong(dlg, DWL_USER, lParam);

#ifdef I18N
                GetWindowText(dlg, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
                UTIL_get_lang_msg("DLG_HOST_TITLE", pvar);
                SetWindowText(dlg, pvar->ts->UIMsg);

                GetDlgItemText(dlg, IDC_HOSTNAMELABEL, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
                UTIL_get_lang_msg("DLG_HOST_TCPIP_HOST", pvar);
                SetDlgItemText(dlg, IDC_HOSTNAMELABEL, pvar->ts->UIMsg);

                GetDlgItemText(dlg, IDC_HISTORY, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
                UTIL_get_lang_msg("DLG_HOST_TCPIP_HISTORY", pvar);
                SetDlgItemText(dlg, IDC_HISTORY, pvar->ts->UIMsg);

                GetDlgItemText(dlg, IDC_SERVICELABEL, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
                UTIL_get_lang_msg("DLG_HOST_TCPIP_SERVICE", pvar);
                SetDlgItemText(dlg, IDC_SERVICELABEL, pvar->ts->UIMsg);

                GetDlgItemText(dlg, IDC_HOSTOTHER, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
                UTIL_get_lang_msg("IDC_HOSTOTHER", pvar);
                SetDlgItemText(dlg, IDC_HOSTOTHER, pvar->ts->UIMsg);

                GetDlgItemText(dlg, IDC_HOSTTCPPORTLABEL, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
                UTIL_get_lang_msg("DLG_HOST_TCPIP_PORT", pvar);
                SetDlgItemText(dlg, IDC_HOSTTCPPORTLABEL, pvar->ts->UIMsg);

                GetDlgItemText(dlg, IDC_SSH_VERSION_LABEL, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
                UTIL_get_lang_msg("DLG_HOST_TCPIP_SSHVERSION", pvar);
                SetDlgItemText(dlg, IDC_SSH_VERSION_LABEL, pvar->ts->UIMsg);

                GetDlgItemText(dlg, IDC_HOSTTCPPROTOCOLLABEL, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
                UTIL_get_lang_msg("DLG_HOST_TCPIP_PROTOCOL", pvar);
                SetDlgItemText(dlg, IDC_HOSTTCPPROTOCOLLABEL, pvar->ts->UIMsg);

                GetDlgItemText(dlg, IDC_HOSTSERIAL, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
                UTIL_get_lang_msg("DLG_HOST_SERIAL", pvar);
                SetDlgItemText(dlg, IDC_HOSTSERIAL, pvar->ts->UIMsg);

                GetDlgItemText(dlg, IDC_HOSTCOMLABEL, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
                UTIL_get_lang_msg("DLG_HOST_SERIAL_PORT", pvar);
                SetDlgItemText(dlg, IDC_HOSTCOMLABEL, pvar->ts->UIMsg);

                GetDlgItemText(dlg, IDC_HOSTHELP, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
                UTIL_get_lang_msg("DLG_HOST_HELP", pvar);
                SetDlgItemText(dlg, IDC_HOSTHELP, pvar->ts->UIMsg);

                GetDlgItemText(dlg, IDOK, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
                UTIL_get_lang_msg("BTN_OK", pvar);
                SetDlgItemText(dlg, IDOK, pvar->ts->UIMsg);

                GetDlgItemText(dlg, IDCANCEL, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
                UTIL_get_lang_msg("BTN_CANCEL", pvar);
                SetDlgItemText(dlg, IDCANCEL, pvar->ts->UIMsg);
#endif

                // �z�X�g�q�X�g�����`�F�b�N�{�b�N�X������ (2005.10.21 yutaka)
                if (pvar->ts->HistoryList > 0) {
                        SendMessage(GetDlgItem(dlg, IDC_HISTORY), BM_SETCHECK, BST_CHECKED, 0);
                } else {
                        SendMessage(GetDlgItem(dlg, IDC_HISTORY), BM_SETCHECK, BST_UNCHECKED, 0);
                }

                if (GetHNRec->PortType == IdFile)
                        GetHNRec->PortType = IdTCPIP;
                CheckRadioButton(dlg, IDC_HOSTTCPIP, IDC_HOSTSERIAL,
                                                 IDC_HOSTTCPIP + GetHNRec->PortType - 1);

                strcpy(EntName, "Host");

                i = 1;
                do {
                        sprintf(&EntName[4], "%d", i);
                        GetPrivateProfileString("Hosts", EntName, "",
                                                                        TempHost, sizeof(TempHost),
                                                                        GetHNRec->SetupFN);
                        if (strlen(TempHost) > 0)
                                SendDlgItemMessage(dlg, IDC_HOSTNAME, CB_ADDSTRING,
                                                                   0, (LPARAM) TempHost);
                        i++;
                } while ((i <= 99) && (strlen(TempHost) > 0));

                SendDlgItemMessage(dlg, IDC_HOSTNAME, EM_LIMITTEXT,
                                                   HostNameMaxLength - 1, 0);

                SendDlgItemMessage(dlg, IDC_HOSTNAME, CB_SETCURSEL, 0, 0);

                CheckRadioButton(dlg, IDC_HOSTTELNET, IDC_HOSTOTHER,
                                                 pvar->settings.Enabled ? IDC_HOSTSSH : GetHNRec->
                                                 Telnet ? IDC_HOSTTELNET : IDC_HOSTOTHER);
                SendDlgItemMessage(dlg, IDC_HOSTTCPPORT, EM_LIMITTEXT, 5, 0);
                SetDlgItemInt(dlg, IDC_HOSTTCPPORT, GetHNRec->TCPPort, FALSE);
#ifdef INET6
                for (i = 0; ProtocolFamilyList[i]; ++i) {
                        SendDlgItemMessage(dlg, IDC_HOSTTCPPROTOCOL, CB_ADDSTRING,
                                                           0, (LPARAM) ProtocolFamilyList[i]);
                }
                SendDlgItemMessage(dlg, IDC_HOSTTCPPROTOCOL, EM_LIMITTEXT,
                                                   ProtocolFamilyMaxLength - 1, 0);
                SendDlgItemMessage(dlg, IDC_HOSTTCPPROTOCOL, CB_SETCURSEL, 0, 0);
#endif                                                  /* INET6 */

                /////// SSH version
                for (i = 0; ssh_version[i]; ++i) {
                        SendDlgItemMessage(dlg, IDC_SSH_VERSION, CB_ADDSTRING,
                                                           0, (LPARAM) ssh_version[i]);
                }
                SendDlgItemMessage(dlg, IDC_SSH_VERSION, EM_LIMITTEXT,
                                                   NUM_ELEM(ssh_version) - 1, 0);

                if (pvar->settings.ssh_protocol_version == 1) {
                        SendDlgItemMessage(dlg, IDC_SSH_VERSION, CB_SETCURSEL, 0, 0); // SSH1
                } else {
                        SendDlgItemMessage(dlg, IDC_SSH_VERSION, CB_SETCURSEL, 1, 0); // SSH2
                }

                if (IsDlgButtonChecked(dlg, IDC_HOSTSSH)) {
                        enable_dlg_items(dlg, IDC_SSH_VERSION, IDC_SSH_VERSION, TRUE); // enabled
                } else {
                        enable_dlg_items(dlg, IDC_SSH_VERSION, IDC_SSH_VERSION, FALSE); // disabled
                }
                /////// SSH version


                j = 0;
                w = 1;
                strcpy(EntName, "COM");
                for (i = 1; i <= GetHNRec->MaxComPort; i++) {
                        sprintf(&EntName[3], "%d", i);
                        SendDlgItemMessage(dlg, IDC_HOSTCOM, CB_ADDSTRING,
                                                           0, (LPARAM) EntName);
                        j++;
                        if (GetHNRec->ComPort == i)
                                w = j;
                }
                if (j > 0)
                        SendDlgItemMessage(dlg, IDC_HOSTCOM, CB_SETCURSEL, w - 1, 0);
                else                                    /* All com ports are already used */
                        GetHNRec->PortType = IdTCPIP;

                if (GetHNRec->PortType == IdTCPIP) {
                        enable_dlg_items(dlg, IDC_HOSTCOMLABEL, IDC_HOSTCOM, FALSE);

                        enable_dlg_items(dlg, IDC_SSH_VERSION, IDC_SSH_VERSION, TRUE); 
                        enable_dlg_items(dlg, IDC_SSH_VERSION_LABEL, IDC_SSH_VERSION_LABEL, TRUE); 
                }
#ifdef INET6
                else {
                        enable_dlg_items(dlg, IDC_HOSTNAMELABEL, IDC_HOSTTCPPORT,
                                                         FALSE);
                        enable_dlg_items(dlg, IDC_HOSTTCPPROTOCOLLABEL,
                                                         IDC_HOSTTCPPROTOCOL, FALSE);

                        enable_dlg_items(dlg, IDC_SSH_VERSION, IDC_SSH_VERSION, FALSE); // disabled
                        enable_dlg_items(dlg, IDC_SSH_VERSION_LABEL, IDC_SSH_VERSION_LABEL, FALSE); // disabled (2004.11.23 yutaka)
                }
#else
                else
                        enable_dlg_items(dlg, IDC_HOSTNAMELABEL, IDC_HOSTTCPPORT,
                                                         FALSE);
#endif                                                  /* INET6 */

                // Host dialog���t�H�[�J�X�������� (2004.10.2 yutaka)
                if (GetHNRec->PortType == IdTCPIP) {
                        HWND hwnd = GetDlgItem(dlg, IDC_HOSTNAME);
                        SetFocus(hwnd);
                } else {
                        HWND hwnd = GetDlgItem(dlg, IDC_HOSTCOM);
                        SetFocus(hwnd);
                }

#ifdef I18N
                font = (HFONT)SendMessage(dlg, WM_GETFONT, 0, 0);
                GetObject(font, sizeof(LOGFONT), &logfont);
                if (UTIL_get_lang_font("DLG_HOST_FONT", dlg, &logfont, &DlgHostFont, pvar)) {
                        SendDlgItemMessage(dlg, IDC_HOSTTCPIP, WM_SETFONT, (WPARAM)DlgHostFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_HOSTNAMELABEL, WM_SETFONT, (WPARAM)DlgHostFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_HISTORY, WM_SETFONT, (WPARAM)DlgHostFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_SERVICELABEL, WM_SETFONT, (WPARAM)DlgHostFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_HOSTTELNET, WM_SETFONT, (WPARAM)DlgHostFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_HOSTSSH, WM_SETFONT, (WPARAM)DlgHostFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_HOSTOTHER, WM_SETFONT, (WPARAM)DlgHostFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_HOSTTCPPORTLABEL, WM_SETFONT, (WPARAM)DlgHostFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_SSH_VERSION_LABEL, WM_SETFONT, (WPARAM)DlgHostFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_HOSTTCPPROTOCOLLABEL, WM_SETFONT, (WPARAM)DlgHostFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_HOSTSERIAL, WM_SETFONT, (WPARAM)DlgHostFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_HOSTCOMLABEL, WM_SETFONT, (WPARAM)DlgHostFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDOK, WM_SETFONT, (WPARAM)DlgHostFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDCANCEL, WM_SETFONT, (WPARAM)DlgHostFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_HOSTHELP, WM_SETFONT, (WPARAM)DlgHostFont, MAKELPARAM(TRUE,0));
                }
                else {
                        DlgHostFont = NULL;
                }
#endif

                // SetFocus()���t�H�[�J�X���������������AFALSE�������K�v�������B
                // TRUE���������ATABSTOP�������������������R���g���[�����I�������B
                // (2004.11.23 yutaka)
                return FALSE;
                //return TRUE;

        case WM_COMMAND:
                switch (LOWORD(wParam)) {
                case IDOK:
                        GetHNRec = (PGetHNRec) GetWindowLong(dlg, DWL_USER);
                        if (GetHNRec != NULL) {
                                if (IsDlgButtonChecked(dlg, IDC_HOSTTCPIP)) {
#ifdef INET6
                                        char afstr[BUFSIZ];
#endif                                                  /* INET6 */
                                        i = GetDlgItemInt(dlg, IDC_HOSTTCPPORT, &Ok, FALSE);
                                        if (Ok) {
                                                GetHNRec->TCPPort = i;
                                        } else {
#ifdef I18N
                                                strcpy(pvar->ts->UIMsg, "The TCP port must be a number.");
                                                UTIL_get_lang_msg("MSG_TCPPORT_NAN_ERROR", pvar);
                                                MessageBox(dlg, pvar->ts->UIMsg,
                                                                   "Teraterm", MB_OK | MB_ICONEXCLAMATION);
#else
                                                MessageBox(dlg, "The TCP port must be a number.",
                                                                   "Teraterm", MB_OK | MB_ICONEXCLAMATION);
#endif
                                                return TRUE;
                                        }
#ifdef INET6
#define getaf(str) \
((strcmp((str), "IPv6") == 0) ? AF_INET6 : \
 ((strcmp((str), "IPv4") == 0) ? AF_INET : AF_UNSPEC))
                                        memset(afstr, 0, sizeof(afstr));
                                        GetDlgItemText(dlg, IDC_HOSTTCPPROTOCOL, afstr,
                                                                   sizeof(afstr));
                                        GetHNRec->ProtocolFamily = getaf(afstr);
#endif                                                  /* INET6 */
                                        GetHNRec->PortType = IdTCPIP;
                                        GetDlgItemText(dlg, IDC_HOSTNAME, GetHNRec->HostName,
                                                                   HostNameMaxLength);
                                        GetHNRec->Telnet = FALSE;
                                        pvar->hostdlg_activated = TRUE;
                                        pvar->hostdlg_Enabled = FALSE;
                                        if (IsDlgButtonChecked(dlg, IDC_HOSTTELNET)) {
                                                GetHNRec->Telnet = TRUE;
                                        } else if (IsDlgButtonChecked(dlg, IDC_HOSTSSH)) {
                                                pvar->hostdlg_Enabled = TRUE;

                                                // check SSH protocol version 
                                                memset(afstr, 0, sizeof(afstr));
                                                GetDlgItemText(dlg, IDC_SSH_VERSION, afstr, sizeof(afstr));
                                                if (_stricmp(afstr, "SSH1") == 0) {
                                                        pvar->settings.ssh_protocol_version = 1;
                                                } else {
                                                        pvar->settings.ssh_protocol_version = 2;
                                                }
                                        }

                                        // host history check button
                                        if (SendMessage(GetDlgItem(dlg, IDC_HISTORY), BM_GETCHECK, 0, 0) == BST_CHECKED) {
                                                pvar->ts->HistoryList = 1;
                                        } else {
                                                pvar->ts->HistoryList = 0;
                                        }

                                } else {
                                        GetHNRec->PortType = IdSerial;
                                        GetHNRec->HostName[0] = 0;
                                        memset(EntName, 0, sizeof(EntName));
                                        GetDlgItemText(dlg, IDC_HOSTCOM, EntName,
                                                                   sizeof(EntName) - 1);
                                        GetHNRec->ComPort = (BYTE) (EntName[3]) - 0x30;
                                        if (strlen(EntName) > 4)
                                                GetHNRec->ComPort =
                                                        GetHNRec->ComPort * 10 + (BYTE) (EntName[4]) -
                                                        0x30;
                                }
                        }
                        EndDialog(dlg, 1);

#ifdef I18N
                        if (DlgSetupFont != NULL) {
                                DeleteObject(DlgSetupFont);
                        }
#endif

                        return TRUE;

                case IDCANCEL:
                        EndDialog(dlg, 0);

#ifdef I18N
                        if (DlgSetupFont != NULL) {
                                DeleteObject(DlgSetupFont);
                        }
#endif
                        
                        return TRUE;

                case IDC_HOSTTCPIP:
                        enable_dlg_items(dlg, IDC_HOSTNAMELABEL, IDC_HOSTTCPPORT,
                                                         TRUE);
#ifdef INET6
                        enable_dlg_items(dlg, IDC_HOSTTCPPROTOCOLLABEL,
                                                         IDC_HOSTTCPPROTOCOL, TRUE);
#endif                                                  /* INET6 */
                        enable_dlg_items(dlg, IDC_HOSTCOMLABEL, IDC_HOSTCOM, FALSE);

                        enable_dlg_items(dlg, IDC_SSH_VERSION_LABEL, IDC_SSH_VERSION_LABEL, TRUE); // disabled (2004.11.23 yutaka)
                        if (IsDlgButtonChecked(dlg, IDC_HOSTSSH)) {
                                enable_dlg_items(dlg, IDC_SSH_VERSION, IDC_SSH_VERSION, TRUE);
                        } else {
                                enable_dlg_items(dlg, IDC_SSH_VERSION, IDC_SSH_VERSION, FALSE); // disabled
                        }

                        enable_dlg_items(dlg, IDC_HISTORY, IDC_HISTORY, TRUE); // disabled

                        return TRUE;

                case IDC_HOSTSERIAL:
                        enable_dlg_items(dlg, IDC_HOSTCOMLABEL, IDC_HOSTCOM, TRUE);
                        enable_dlg_items(dlg, IDC_HOSTNAMELABEL, IDC_HOSTTCPPORT,
                                                         FALSE);
#ifdef INET6
                        enable_dlg_items(dlg, IDC_HOSTTCPPROTOCOLLABEL,
                                                         IDC_HOSTTCPPROTOCOL, FALSE);
#endif                                                  /* INET6 */
                        enable_dlg_items(dlg, IDC_SSH_VERSION, IDC_SSH_VERSION, FALSE); // disabled
                        enable_dlg_items(dlg, IDC_SSH_VERSION_LABEL, IDC_SSH_VERSION_LABEL, FALSE); // disabled (2004.11.23 yutaka)

                        enable_dlg_items(dlg, IDC_HISTORY, IDC_HISTORY, FALSE); // disabled

                        return TRUE;

                case IDC_HOSTSSH:
                        enable_dlg_items(dlg, IDC_SSH_VERSION,
                                                         IDC_SSH_VERSION, TRUE);
                        goto hostssh_enabled;

                case IDC_HOSTTELNET:
                case IDC_HOSTOTHER:
                        enable_dlg_items(dlg, IDC_SSH_VERSION, IDC_SSH_VERSION, FALSE); // disabled
hostssh_enabled:

                        GetHNRec = (PGetHNRec) GetWindowLong(dlg, DWL_USER);

                        if (IsDlgButtonChecked(dlg, IDC_HOSTTELNET)) {
                                if (GetHNRec != NULL)
                                        SetDlgItemInt(dlg, IDC_HOSTTCPPORT, GetHNRec->TelPort,
                                                                  FALSE);
                        } else if (IsDlgButtonChecked(dlg, IDC_HOSTSSH)) {
                                SetDlgItemInt(dlg, IDC_HOSTTCPPORT, 22, FALSE);
                        }
                        return TRUE;

                case IDC_HOSTHELP:
                        PostMessage(GetParent(dlg), WM_USER_DLGHELP2, 0, 0);
                }
        }
        return FALSE;
}

static BOOL FAR PASCAL TTXGetHostName(HWND parent, PGetHNRec rec)
{
        return (BOOL) DialogBoxParam(hInst, MAKEINTRESOURCE(IDD_HOSTDLG),
                                                                 parent, TTXHostDlg, (LONG) rec);
}

static void PASCAL FAR TTXGetUIHooks(TTXUIHooks FAR * hooks)
{
        GET_VAR();

        *hooks->GetHostName = TTXGetHostName;
}

static void FAR PASCAL TTXReadINIFile(PCHAR fileName, PTTSet ts)
{
        GET_VAR();

        (pvar->ReadIniFile) (fileName, ts);
        read_ssh_options(pvar, fileName);
        pvar->settings = *pvar->ts_SSH;
        notify_verbose_message(pvar, "Reading INI file", LOG_LEVEL_VERBOSE);
        FWDUI_load_settings(pvar);
}

static void FAR PASCAL TTXWriteINIFile(PCHAR fileName, PTTSet ts)
{
        GET_VAR();

        (pvar->WriteIniFile) (fileName, ts);
        *pvar->ts_SSH = pvar->settings;
        clear_local_settings(pvar);
        notify_verbose_message(pvar, "Writing INI file", LOG_LEVEL_VERBOSE);
        write_ssh_options(pvar, fileName, pvar->ts_SSH, TRUE);
}

static void read_ssh_options_from_user_file(PTInstVar pvar,
                                                                                        char FAR * user_file_name)
{
        if (user_file_name[0] == '.') {
                read_ssh_options(pvar, user_file_name);
        } else {
                char buf[1024];

                get_teraterm_dir_relative_name(buf, sizeof(buf), user_file_name);
                read_ssh_options(pvar, buf);
        }

        pvar->settings = *pvar->ts_SSH;
        FWDUI_load_settings(pvar);
}


// @���u�����N���u�������B (2005.1.26 yutaka)
static void replace_to_blank(char *src, char *dst, int dst_len)
{
        int len, i;

        len = strlen(src);
        if (dst_len < len) // buffer overflow check
                return;

        for (i = 0 ; i < len ; i++) {
                if (src[i] == '@') { // @ ���o��������
                        if (i < len - 1 && src[i + 1] == '@') { // �������� @ �����A�b�g�}�[�N���F������
                                *dst++ = '@';
                                i++;
                        } else {
                                *dst++ = ' '; // �������u��������
                        }
                } else {
                        *dst++ = src[i];
                }
        }
        *dst = '\0';
}

/* returns 1 if the option text must be deleted */
static int parse_option(PTInstVar pvar, char FAR * option)
{
        if ((option[0] == '-' || option[0] == '/')) {
                if (MATCH_STR(option + 1, "ssh") == 0) {
                        if (option[4] == 0) {
                                pvar->settings.Enabled = 1;
                        } else if (MATCH_STR(option + 4, "-L") == 0
                                           || MATCH_STR(option + 4, "-R") == 0
                                           || _stricmp(option + 4, "-X") == 0) {
                                if (pvar->settings.DefaultForwarding[0] == 0) {
                                        strcpy(pvar->settings.DefaultForwarding, option + 5);
                                } else {
                                        strcat(pvar->settings.DefaultForwarding, ";");
                                        strcat(pvar->settings.DefaultForwarding, option + 5);
                                }
                        } else if (MATCH_STR(option + 4, "-f=") == 0) {
                                read_ssh_options_from_user_file(pvar, option + 7);
                        } else if (MATCH_STR(option + 4, "-v") == 0) {
                                pvar->settings.LogLevel = LOG_LEVEL_VERBOSE;
                        } else if (_stricmp(option + 4, "-autologin") == 0
                                           || _stricmp(option + 4, "-autologon") == 0) {
                                pvar->settings.TryDefaultAuth = TRUE;

                        } else if (MATCH_STR(option + 4, "-consume=") == 0) {
                                read_ssh_options_from_user_file(pvar, option + 13);
                                DeleteFile(option + 13);

                        // /ssh1 �� /ssh2 �I�v�V�������V�K���� (2006.9.16 maya)
                        } else if (MATCH_STR(option + 4, "1") == 0) {
                                pvar->settings.ssh_protocol_version = 1;
                        } else if (MATCH_STR(option + 4, "2") == 0) {
                                pvar->settings.ssh_protocol_version = 2;

                        } else {
                                char buf[1024];

#ifdef I18N
                                strcpy(pvar->ts->UIMsg, "Unrecognized command-line option: %s");
                                UTIL_get_lang_msg("MSG_UNKNOWN_OPTION_ERROR", pvar);
                                _snprintf(buf, sizeof(buf), pvar->ts->UIMsg, option);
#else
                                _snprintf(buf, sizeof(buf),
                                                  "Unrecognized command-line option: %s", option);
#endif
                                buf[sizeof(buf) - 1] = 0;

                                MessageBox(NULL, buf, "TTSSH", MB_OK | MB_ICONEXCLAMATION);
                        }

                        return 1;

                // ttermpro.exe �� /T= �w�������p�������A������������ (2006.10.19 maya)
                } else if (MATCH_STR_I(option + 1, "t=") == 0) {
                        if (strcmp(option + 3, "2") == 0) {
                                pvar->settings.Enabled = 1;
                                return 1;
                        } else {
                                pvar->settings.Enabled = 0;
                        }

                // ttermpro.exe �� /F= �w������ TTSSH ������������ (2006.10.11 maya)
                } else if (MATCH_STR_I(option + 1, "f=") == 0) {
                        read_ssh_options_from_user_file(pvar, option + 3);

                // /1 ������ /2 �I�v�V�������V�K���� (2004.10.3 yutaka)
                } else if (MATCH_STR(option + 1, "1") == 0) {
                        // command line: /ssh /1 is SSH1 only
                        pvar->settings.ssh_protocol_version = 1;

                } else if (MATCH_STR(option + 1, "2") == 0) {
                        // command line: /ssh /2 is SSH2 & SSH1
                        pvar->settings.ssh_protocol_version = 2;

                } else if (MATCH_STR(option + 1, "nossh") == 0) {
                        // '/nossh' �I�v�V�����������B
                        // TERATERM.INI ��SSH���L�������������������A������Cygterm���N��������������
                        // �����������������B(2004.10.11 yutaka)
                        pvar->settings.Enabled = 0;

                } else if (MATCH_STR(option + 1, "telnet") == 0) {
                        // '/telnet' ���w�������������������� '/nossh' ��������
                        // SSH������������ (2006.9.16 maya)
                        pvar->settings.Enabled = 0;

                } else if (MATCH_STR(option + 1, "auth") == 0) {
                        // SSH2�������O�C���I�v�V���������� 
                        //
                        // SYNOPSIS: /ssh /auth=passowrd /user=���[�U�� /passwd=�p�X���[�h
                        //           /ssh /auth=publickey /user=���[�U�� /passwd=�p�X���[�h /keyfile=�p�X
                        // EXAMPLE: /ssh /auth=password /user=nike /passwd=a@bc
                        //          /ssh /auth=publickey /user=foo /passwd=bar /keyfile=d:\tmp\id_rsa
                        // NOTICE: �p�X���[�h���p�X�������������������A�u�����N���������� @ ���g�������B
                        //
                        // (2004.11.30 yutaka)
                        // (2005.1.26 yutaka) ���������B���J���F���T�|�[�g�B
                        //
                        pvar->ssh2_autologin = 1; // for SSH2 (2004.11.30 yutaka)

                        if (MATCH_STR(option + 5, "=password") == 0) { // �p�X���[�h/keyboard-interactive�F��
                                //pvar->auth_state.cur_cred.method = SSH_AUTH_PASSWORD;
                                pvar->ssh2_authmethod = SSH_AUTH_PASSWORD;

                        } else if (MATCH_STR(option + 5, "=publickey") == 0) { // ���J���F��
                                //pvar->auth_state.cur_cred.method = SSH_AUTH_RSA;
                                pvar->ssh2_authmethod = SSH_AUTH_RSA;

                        } else {
                                // TODO:

                        }

                } else if (MATCH_STR(option + 1, "user=") == 0) {
                        replace_to_blank(option + 6, pvar->ssh2_username, sizeof(pvar->ssh2_username));
                        //_snprintf(pvar->ssh2_username, sizeof(pvar->ssh2_username), "%s", option + 6);

                } else if (MATCH_STR(option + 1, "passwd=") == 0) {
                        replace_to_blank(option + 8, pvar->ssh2_password, sizeof(pvar->ssh2_password));
                        //_snprintf(pvar->ssh2_password, sizeof(pvar->ssh2_password), "%s", option + 8);

                } else if (MATCH_STR(option + 1, "keyfile=") == 0) {
                        replace_to_blank(option + 9, pvar->ssh2_keyfile, sizeof(pvar->ssh2_keyfile));

                } else if (MATCH_STR(option + 1, "ask4passwd") == 0) {
                        // �p�X���[�h������ (2006.9.18 maya)
                        pvar->ask4passwd = 1;

                }

                // �p�X���[�h�������������������O�C��������������
                // /auth ���F�����\�b�h���w�������������p������ (2006.9.18 maya)
                if (pvar->ask4passwd == 1) {
                        pvar->ssh2_autologin = 0;
                }

        }

        return 0;
}

static void FAR PASCAL TTXParseParam(PCHAR param, PTTSet ts,
                                                                         PCHAR DDETopic)
{
        // �X�y�[�X�������t�@�C�������F�������������C�� (2006.10.7 maya)
        int i;
        BOOL inParam = FALSE;
        BOOL inQuotes = FALSE;
        BOOL inFileParam = FALSE;
        PCHAR option = NULL;
        GET_VAR();

        if (pvar->hostdlg_activated) {
                pvar->settings.Enabled = pvar->hostdlg_Enabled;
        }

        for (i = 0; param[i] != 0; i++) {
                if (inQuotes ? param[i] == '"'
                                         : (param[i] == ' ' || param[i] == '\t')) {
                        if (option != NULL) {
                                char ch = param[i];
                                PCHAR Equal;

                                param[i] = 0;
                                Equal = strchr(option, '=');
                                if (inFileParam && Equal != NULL && *(Equal + 1) == '"') {
                                        char *buf = (char *)calloc(strlen(option), sizeof(char));
                                        strncat(buf, option, Equal - option + 1);
                                        strcat(buf, Equal + 2);
                                        if (parse_option
                                                (pvar, *buf == '"' ? buf + 1 : buf)) {
                                                memset(option, ' ', i + 1 - (option - param));
                                        } else {
                                                param[i] = ch;
                                        }
                                        free(buf);
                                }
                                else {
                                        if (parse_option
                                                (pvar, *option == '"' ? option + 1 : option)) {
                                                memset(option, ' ', i + 1 - (option - param));
                                        } else {
                                                param[i] = ch;
                                        }
                                }
                                option = NULL;
                        }
                        inParam = FALSE;
                        inQuotes = FALSE;
                        inFileParam = FALSE;
                } else if (!inParam) {
                        if (param[i] == '"') {
                                inQuotes = TRUE;
                                inParam = TRUE;
                                option = param + i;
                        } else if (param[i] != ' ' && param[i] != '\t') {
                                inParam = TRUE;
                                option = param + i;
                        }
                } else {
                        if (option == NULL) {
                                continue;
                        }
                        if ((option[0] == '-' || option[0] == '/') &&
                                (MATCH_STR(option + 1, "ssh-f=") == 0 ||
                                 MATCH_STR(option + 1, "ssh-consume=") == 0 ||
                                 MATCH_STR_I(option + 1, "f=") == 0)) {
                                if (param[i] == '"') {
                                        inQuotes = TRUE;
                                }
                                inFileParam = TRUE;
                        }
                }
        }

        if (option != NULL) {
                PCHAR Equal = strchr(option, '=');
                if (inFileParam && Equal != NULL && *(Equal + 1) == '"') {
                        char *buf = (char *)calloc(strlen(option), sizeof(char));
                        strncat(buf, option, Equal - option + 1);
                        strcat(buf, Equal + 2);
                        if (parse_option
                                (pvar, *buf == '"' ? buf + 1 : buf)) {
                                memset(option, ' ', i + 1 - (option - param));
                        }
                        free(buf);
                }
                else {
                        if (parse_option(pvar, option)) {
                                memset(option, ' ', i - (option - param));
                        }
                }
        }

        FWDUI_load_settings(pvar);

        (pvar->ParseParam) (param, ts, DDETopic);

}

static void PASCAL FAR TTXGetSetupHooks(TTXSetupHooks FAR * hooks)
{
        GET_VAR();

        pvar->ReadIniFile = *hooks->ReadIniFile;
        pvar->WriteIniFile = *hooks->WriteIniFile;
        pvar->ParseParam = *hooks->ParseParam;

        *hooks->ReadIniFile = TTXReadINIFile;
        *hooks->WriteIniFile = TTXWriteINIFile;
        *hooks->ParseParam = TTXParseParam;
}

static void PASCAL FAR TTXSetWinSize(int rows, int cols)
{
        GET_VAR();

        SSH_notify_win_size(pvar, cols, rows);
}

static void insertMenuBeforeItem(HMENU menu, WORD beforeItemID, WORD flags,
                                                                 WORD newItemID, char FAR * text)
{
        int i, j;

        for (i = GetMenuItemCount(menu) - 1; i >= 0; i--) {
                HMENU submenu = GetSubMenu(menu, i);

                for (j = GetMenuItemCount(submenu) - 1; j >= 0; j--) {
                        if (GetMenuItemID(submenu, j) == beforeItemID) {
                                InsertMenu(submenu, j, MF_BYPOSITION | flags, newItemID,
                                                   text);
                                return;
                        }
                }
        }
}

static void PASCAL FAR TTXModifyMenu(HMENU menu)
{
        GET_VAR();

        /* inserts before ID_HELP_ABOUT */
#ifdef I18N
        strcpy(pvar->ts->UIMsg, "About &TTSSH...");
        UTIL_get_lang_msg("MENU_ABOUT", pvar);
        insertMenuBeforeItem(menu, 50990, MF_ENABLED, ID_ABOUTMENU, pvar->ts->UIMsg);
#else
        insertMenuBeforeItem(menu, 50990, MF_ENABLED, ID_ABOUTMENU,
                                                 "About &TTSSH...");
#endif

        /* inserts before ID_SETUP_TCPIP */
#ifdef I18N
        strcpy(pvar->ts->UIMsg, "SS&H...");
        UTIL_get_lang_msg("MENU_SSH", pvar);
        insertMenuBeforeItem(menu, 50360, MF_ENABLED, ID_SSHSETUPMENU, pvar->ts->UIMsg);
#else
        insertMenuBeforeItem(menu, 50360, MF_ENABLED, ID_SSHSETUPMENU,
                                                 "SS&H...");
#endif
        /* inserts before ID_SETUP_TCPIP */
#ifdef I18N
        strcpy(pvar->ts->UIMsg, "SSH &Authentication...");
        UTIL_get_lang_msg("MENU_SSH_AUTH", pvar);
        insertMenuBeforeItem(menu, 50360, MF_ENABLED, ID_SSHAUTHSETUPMENU, pvar->ts->UIMsg);
#else
        insertMenuBeforeItem(menu, 50360, MF_ENABLED, ID_SSHAUTHSETUPMENU,
                                                 "SSH &Authentication...");
#endif
        /* inserts before ID_SETUP_TCPIP */
#ifdef I18N
        strcpy(pvar->ts->UIMsg, "SSH F&orwarding...");
        UTIL_get_lang_msg("MENU_SSH_FORWARD", pvar);
        insertMenuBeforeItem(menu, 50360, MF_ENABLED, ID_SSHFWDSETUPMENU, pvar->ts->UIMsg);
#else
        insertMenuBeforeItem(menu, 50360, MF_ENABLED, ID_SSHFWDSETUPMENU,
                                                 "SSH F&orwarding...");
#endif

#ifdef I18N
        strcpy(pvar->ts->UIMsg, "SSH KeyGenerator...");
        UTIL_get_lang_msg("MENU_SSH_KEYGEN", pvar);
        insertMenuBeforeItem(menu, 50360, MF_ENABLED, ID_SSHKEYGENMENU, pvar->ts->UIMsg);
#else
        insertMenuBeforeItem(menu, 50360, MF_ENABLED, ID_SSHKEYGENMENU,
                                                 "SSH KeyGenerator...");
#endif
}

static void append_about_text(HWND dlg, char FAR * prefix, char FAR * msg)
{
        SendDlgItemMessage(dlg, IDC_ABOUTTEXT, EM_REPLACESEL, 0,
                                           (LPARAM) prefix);
        SendDlgItemMessage(dlg, IDC_ABOUTTEXT, EM_REPLACESEL, 0, (LPARAM) msg);
        SendDlgItemMessage(dlg, IDC_ABOUTTEXT, EM_REPLACESEL, 0,
                                           (LPARAM) (char FAR *) "\r\n");
}

// ���s�t�@�C�������o�[�W�������������� (2005.2.28 yutaka)
void get_file_version(char *exefile, int *major, int *minor, int *release, int *build)
{
        typedef struct {
                WORD wLanguage;
                WORD wCodePage;
        } LANGANDCODEPAGE, *LPLANGANDCODEPAGE;
        LPLANGANDCODEPAGE lplgcode;
        UINT unLen;
        DWORD size;
        char *buf = NULL;
        BOOL ret;
        int i;
        char fmt[80];
        char *pbuf;

        size = GetFileVersionInfoSize(exefile, NULL);
        if (size == 0) {
                goto error;
        }
        buf = malloc(size);
        ZeroMemory(buf, size);

        if (GetFileVersionInfo(exefile, 0, size, buf) == FALSE) {
                goto error;
        }

        ret = VerQueryValue(buf,
                        "\\VarFileInfo\\Translation", 
                        (LPVOID *)&lplgcode, &unLen);
        if (ret == FALSE)
                goto error;

        for (i = 0 ; i < (int)(unLen / sizeof(LANGANDCODEPAGE)) ; i++) {
                _snprintf(fmt, sizeof(fmt), "\\StringFileInfo\\%04x%04x\\FileVersion", 
                        lplgcode[i].wLanguage, lplgcode[i].wCodePage);
                VerQueryValue(buf, fmt, &pbuf, &unLen);
                if (unLen > 0) { // get success
                        int n, a, b, c, d;

                        n = sscanf(pbuf, "%d, %d, %d, %d", &a, &b, &c, &d);
                        if (n == 4) { // convert success
                                *major = a;
                                *minor = b;
                                *release = c;
                                *build = d;
                                break;
                        }
                }
        }

        free(buf);
        return;

error:
        free(buf);
        *major = *minor = *release = *build = 0;
}

static void init_about_dlg(PTInstVar pvar, HWND dlg)
{
        char buf[1024];
        int a, b, c, d;
        
#ifdef I18N
        GetWindowText(dlg, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
        UTIL_get_lang_msg("DLG_ABOUT_TITLE", pvar);
        SetWindowText(dlg, pvar->ts->UIMsg);

        GetDlgItemText(dlg, IDOK, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
        UTIL_get_lang_msg("BTN_OK", pvar);
        SetDlgItemText(dlg, IDOK, pvar->ts->UIMsg);
#endif
        
        // TTSSH���o�[�W�������������� (2005.2.28 yutaka)
        get_file_version("ttxssh.dll", &a, &b, &c, &d);
        _snprintf(buf, sizeof(buf), "TTSSH\r\nTeraterm Secure Shell extension, %d.%d", a, b);
        SendMessage(GetDlgItem(dlg, IDC_TTSSH_VERSION), WM_SETTEXT, 0, (LPARAM)buf);

        // OpenSSL���o�[�W�������������� (2005.1.24 yutaka)
        // ���������� (2005.5.11 yutaka)
#ifdef OPENSSL_VERSION_TEXT
        SendMessage(GetDlgItem(dlg, IDC_OPENSSL_VERSION), WM_SETTEXT, 0, (LPARAM)OPENSSL_VERSION_TEXT);
#else
        SendMessage(GetDlgItem(dlg, IDC_OPENSSL_VERSION), WM_SETTEXT, 0, (LPARAM)"Unknown");
#endif

        // zlib���o�[�W�������������� (2005.5.11 yutaka)
#ifdef ZLIB_VERSION
        _snprintf(buf, sizeof(buf), "ZLib %s", ZLIB_VERSION);
#else
        _snprintf(buf, sizeof(buf), "ZLib Unknown");
#endif
        SendMessage(GetDlgItem(dlg, IDC_ZLIB_VERSION), WM_SETTEXT, 0, (LPARAM)buf);


        // TTSSH�_�C�A���O���\������SSH������������ (2004.10.30 yutaka)
        if (pvar->socket != INVALID_SOCKET) {
                if (SSHv1(pvar)) {
                        SSH_get_server_ID_info(pvar, buf, sizeof(buf));
                        append_about_text(dlg, "Server ID: ", buf);
                        SSH_get_protocol_version_info(pvar, buf, sizeof(buf));
                        append_about_text(dlg, "Using protocol: ", buf);
                        CRYPT_get_cipher_info(pvar, buf, sizeof(buf));
                        append_about_text(dlg, "Encryption: ", buf);
                        CRYPT_get_server_key_info(pvar, buf, sizeof(buf));
                        append_about_text(dlg, "Server keys: ", buf);
                        AUTH_get_auth_info(pvar, buf, sizeof(buf));
                        append_about_text(dlg, "Authentication: ", buf);
                        SSH_get_compression_info(pvar, buf, sizeof(buf));
                        append_about_text(dlg, "Compression: ", buf);

                } else { // SSH2
                        SSH_get_server_ID_info(pvar, buf, sizeof(buf));
                        append_about_text(dlg, "Server ID: ", buf);

                        append_about_text(dlg, "Client ID: ", pvar->client_version_string);

                        SSH_get_protocol_version_info(pvar, buf, sizeof(buf));
                        append_about_text(dlg, "Using protocol: ", buf);

                        if (pvar->kex_type == KEX_DH_GRP1_SHA1) {
                                strcpy(buf, KEX_DH1);
                        } else if (pvar->kex_type == KEX_DH_GRP14_SHA1) {
                                strcpy(buf, KEX_DH14);
                        } else {
                                strcpy(buf, KEX_DHGEX);
                        }
                        append_about_text(dlg, "KEX: ", buf);

                        if (pvar->hostkey_type == KEY_DSA) {
                                strcpy(buf, "ssh-dss");
                        } else {
                                strcpy(buf, "ssh-rsa");
                        }
                        append_about_text(dlg, "Host Key: ", buf);

                        // add HMAC algorithm (2004.12.17 yutaka)
                        buf[0] = '\0';
                        if (pvar->ctos_hmac == HMAC_SHA1) {
                                strcat(buf, "hmac-sha1");
                        } else if (pvar->ctos_hmac == HMAC_MD5) {
                                strcat(buf, "hmac-md5");
                        }
                        strcat(buf, " to server, ");
                        if (pvar->stoc_hmac == HMAC_SHA1) {
                                strcat(buf, "hmac-sha1");
                        } else if (pvar->stoc_hmac == HMAC_MD5) {
                                strcat(buf, "hmac-md5");
                        }
                        strcat(buf, " from server");
                        append_about_text(dlg, "HMAC: ", buf);

                        CRYPT_get_cipher_info(pvar, buf, sizeof(buf));
                        append_about_text(dlg, "Encryption: ", buf);
                        CRYPT_get_server_key_info(pvar, buf, sizeof(buf));
                        append_about_text(dlg, "Server keys: ", buf);
                        AUTH_get_auth_info(pvar, buf, sizeof(buf));
                        append_about_text(dlg, "Authentication: ", buf);

                        SSH_get_compression_info(pvar, buf, sizeof(buf));
                        if (pvar->ctos_compression == COMP_DELAYED) { // �x���p�P�b�g���k������ (2006.6.23 yutaka)
                                append_about_text(dlg, "Delayed Compression: ", buf);
                        } else {
                                append_about_text(dlg, "Compression: ", buf);
                        }

                }
        }
}

static BOOL CALLBACK TTXAboutDlg(HWND dlg, UINT msg, WPARAM wParam,
                                                                 LPARAM lParam)
{
#ifdef I18N
        LOGFONT logfont;
        HFONT font;
#endif
        switch (msg) {
        case WM_INITDIALOG:
#ifdef I18N
                font = (HFONT)SendMessage(dlg, WM_GETFONT, 0, 0);
                GetObject(font, sizeof(LOGFONT), &logfont);
                if (UTIL_get_lang_font("DLG_FONT", dlg, &logfont, &DlgAboutFont, pvar)) {
                        SendDlgItemMessage(dlg, IDC_TTSSH_VERSION, WM_SETFONT, (WPARAM)DlgAboutFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_SSHVERSIONS, WM_SETFONT, (WPARAM)DlgAboutFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_INCLUDES, WM_SETFONT, (WPARAM)DlgAboutFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_OPENSSL_VERSION, WM_SETFONT, (WPARAM)DlgAboutFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_ZLIB_VERSION, WM_SETFONT, (WPARAM)DlgAboutFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_WEBSITES, WM_SETFONT, (WPARAM)DlgAboutFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_CRYPTOGRAPHY, WM_SETFONT, (WPARAM)DlgAboutFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_CREDIT, WM_SETFONT, (WPARAM)DlgAboutFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDC_ABOUTTEXT, WM_SETFONT, (WPARAM)DlgAboutFont, MAKELPARAM(TRUE,0));
                        SendDlgItemMessage(dlg, IDOK, WM_SETFONT, (WPARAM)DlgAboutFont, MAKELPARAM(TRUE,0));
                }
                else {
                        DlgAboutFont = NULL;
                }
#endif
                init_about_dlg((PTInstVar) lParam, dlg);
                return TRUE;
        case WM_COMMAND:
                switch (LOWORD(wParam)) {
                case IDOK:
                        EndDialog(dlg, 1);
#ifdef I18N
                        if (DlgAboutFont != NULL) {
                                DeleteObject(DlgAboutFont);
                        }
#endif
                        return TRUE;
                case IDCANCEL:                  /* there isn't a cancel button, but other Windows
                                                                   UI things can send this message */
                        EndDialog(dlg, 0);
#ifdef I18N
                        if (DlgAboutFont != NULL) {
                                DeleteObject(DlgAboutFont);
                        }
#endif
                        return TRUE;
                }
                break;
        }

        return FALSE;
}

static char FAR *get_cipher_name(int cipher)
{
        switch (cipher) {
        case SSH_CIPHER_NONE:
#ifdef I18N
                strcpy(pvar->ts->UIMsg, "<ciphers below this line are disabled>");
                UTIL_get_lang_msg("DLG_SSHSETUP_CIPHER_BORDER", pvar);
                return pvar->ts->UIMsg;
#else
                return "<ciphers below this line are disabled>";
#endif
        case SSH_CIPHER_RC4:
                return "RC4";
        case SSH_CIPHER_3DES:
                return "3DES";
        case SSH_CIPHER_DES:
                return "DES";
        case SSH_CIPHER_IDEA:
                return "IDEA";
        case SSH_CIPHER_TSS:
                return "TSS";
        case SSH_CIPHER_BLOWFISH:
                return "Blowfish";

        // for SSH2(yutaka)
        case SSH_CIPHER_AES128:
                return "AES128(SSH2)";
        case SSH_CIPHER_3DES_CBC:
                return "3DES-CBC(SSH2)";

        default:
                return NULL;
        }
}

static void set_move_button_status(HWND dlg)
{
        HWND cipherControl = GetDlgItem(dlg, IDC_SSHCIPHERPREFS);
        int curPos = (int) SendMessage(cipherControl, LB_GETCURSEL, 0, 0);
        int maxPos = (int) SendMessage(cipherControl, LB_GETCOUNT, 0, 0) - 1;

        EnableWindow(GetDlgItem(dlg, IDC_SSHMOVECIPHERUP), curPos > 0
                                 && curPos <= maxPos);
        EnableWindow(GetDlgItem(dlg, IDC_SSHMOVECIPHERDOWN), curPos >= 0
                                 && curPos < maxPos);
}

static void init_setup_dlg(PTInstVar pvar, HWND dlg)
{
        HWND compressionControl = GetDlgItem(dlg, IDC_SSHCOMPRESSIONLEVEL);
        HWND cipherControl = GetDlgItem(dlg, IDC_SSHCIPHERPREFS);
        int i;
        int ch;
        
#ifdef I18N
        GetWindowText(dlg, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
        UTIL_get_lang_msg("DLG_SSHSETUP_TITLE", pvar);
        SetWindowText(dlg, pvar->ts->UIMsg);

        GetDlgItemText(dlg, IDC_COMPRESSLABEL, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
        UTIL_get_lang_msg("DLG_SSHSETUP_COMPRESS", pvar);
        SetDlgItemText(dlg, IDC_COMPRESSLABEL, pvar->ts->UIMsg);

        GetDlgItemText(dlg, IDC_COMPRESSNONE, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
        UTIL_get_lang_msg("DLG_SSHSETUP_COMPRESS_NONE", pvar);
        SetDlgItemText(dlg, IDC_COMPRESSNONE, pvar->ts->UIMsg);

        GetDlgItemText(dlg, IDC_COMPRESSHIGH, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
        UTIL_get_lang_msg("DLG_SSHSETUP_COMPRESS_HIGHEST", pvar);
        SetDlgItemText(dlg, IDC_COMPRESSHIGH, pvar->ts->UIMsg);

        GetDlgItemText(dlg, IDC_CIPHERORDER, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
        UTIL_get_lang_msg("DLG_SSHSETUP_CHIPER", pvar);
        SetDlgItemText(dlg, IDC_CIPHERORDER, pvar->ts->UIMsg);

        GetDlgItemText(dlg, IDC_SSHMOVECIPHERUP, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
        UTIL_get_lang_msg("DLG_SSHSETUP_CHIPER_UP", pvar);
        SetDlgItemText(dlg, IDC_SSHMOVECIPHERUP, pvar->ts->UIMsg);

        GetDlgItemText(dlg, IDC_SSHMOVECIPHERDOWN, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
        UTIL_get_lang_msg("DLG_SSHSETUP_CHIPER_DOWN", pvar);
        SetDlgItemText(dlg, IDC_SSHMOVECIPHERDOWN, pvar->ts->UIMsg);

        GetDlgItemText(dlg, IDC_KNOWNHOSTS, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
        UTIL_get_lang_msg("DLG_SSHSETUP_KNOWNHOST", pvar);
        SetDlgItemText(dlg, IDC_KNOWNHOSTS, pvar->ts->UIMsg);

        GetDlgItemText(dlg, IDC_CHOOSEREADWRITEFILE, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
        UTIL_get_lang_msg("DLG_SSHSETUP_KNOWNHOST_RW", pvar);
        SetDlgItemText(dlg, IDC_CHOOSEREADWRITEFILE, pvar->ts->UIMsg);

        GetDlgItemText(dlg, IDC_CHOOSEREADONLYFILE, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
        UTIL_get_lang_msg("DLG_SSHSETUP_KNOWNHOST_RO", pvar);
        SetDlgItemText(dlg, IDC_CHOOSEREADONLYFILE, pvar->ts->UIMsg);

        GetDlgItemText(dlg, IDC_HEARTBEATLABEL, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
        UTIL_get_lang_msg("DLG_SSHSETUP_HEARTBEAT", pvar);
        SetDlgItemText(dlg, IDC_HEARTBEATLABEL, pvar->ts->UIMsg);

        GetDlgItemText(dlg, IDC_HEARTBEATLABEL2, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
        UTIL_get_lang_msg("DLG_SSHSETUP_HEARTBEAT_UNIT", pvar);
        SetDlgItemText(dlg, IDC_HEARTBEATLABEL2, pvar->ts->UIMsg);

        GetDlgItemText(dlg, IDC_NOTICEBANNER, pvar->ts->UIMsg, sizeof(pvar->ts->UIMsg));
        UTIL_get_lang_msg("DLG_SSHSETUP_NOTICE", pvar);
        SetDlgItemText(dlg, IDC_NOTICEBANNER, pvar->ts->UIMsg);

        strcpy(pvar->ts->UIMsg, "OK");
        UTIL_get_lang_msg("BTN_OK", pvar);
        SetDlgItemText(dlg, IDOK, pvar->ts->UIMsg);

        strcpy(pvar->ts->UIMsg, "Cancel");
        UTIL_get_lang_msg("BTN_CANCEL", pvar);
        SetDlgItemText(dlg, IDCANCEL, pvar->ts->UIMsg);
#endif
        
        SendMessage(compressionControl, TBM_SETRANGE, TRUE, MAKELONG(0, 9));
        SendMessage(compressionControl, TBM_SETPOS, TRUE,
                                pvar->settings.CompressionLevel);

        normalize_cipher_order(pvar->settings.CipherOrder);

        for (i = 0; pvar->settings.CipherOrder[i] != 0; i++) {
                int cipher = pvar->settings.CipherOrder[i] - '0';
                char FAR *name = get_cipher_name(cipher);

                if (name != NULL) {
                        SendMessage(cipherControl, LB_ADDSTRING, 0, (LPARAM) name);
                }
        }

        SendMessage(cipherControl, LB_SETCURSEL, 0, 0);
        set_move_button_status(dlg);

        for (i = 0; (ch = pvar->settings.KnownHostsFiles[i]) != 0 && ch != ';';
                 i++) {
        }
        if (ch != 0) {
                pvar->settings.KnownHostsFiles[i] = 0;
                SetDlgItemText(dlg, IDC_READWRITEFILENAME,
                                           pvar->settings.KnownHostsFiles);
                pvar->settings.KnownHostsFiles[i] = ch;
                SetDlgItemText(dlg, IDC_READONLYFILENAME,
                                           pvar->settings.KnownHostsFiles + i + 1);
        } else {
                SetDlgItemText(dlg, IDC_READWRITEFILENAME,
                                           pvar->settings.KnownHostsFiles);
        }

        // SSH2 HeartBeat(keep-alive)������ (2005.2.22 yutaka)
        {
                char buf[10];
                _snprintf(buf, sizeof(buf), "%d", pvar->settings.ssh_heartbeat_overtime);
                SetDlgItemText(dlg, IDC_HEARTBEAT_EDIT, buf);
        }

}

void get_teraterm_dir_relative_name(char FAR * buf, int bufsize,
                                                                        char FAR * basename)
{
        int filename_start = 0;
        int i;
        int ch;

        if (basename[0] == '\\' || basename[0] == '/'
                || (basename[0] != 0 && basename[1] == ':')) {
                strncpy(buf, basename, bufsize);
                buf[bufsize - 1] = 0;
                return;
        }

        GetModuleFileName(NULL, buf, bufsize);
        for (i = 0; (ch = buf[i]) != 0; i++) {
                if (ch == '\\' || ch == '/' || ch == ':') {
                        filename_start = i + 1;
                }
        }

        if (bufsize > filename_start) {
                strncpy(buf + filename_start, basename, bufsize - filename_start);
        }
        buf[bufsize - 1] = 0;
}

int copy_teraterm_dir_relative_path(char FAR * dest, int destsize,
                                                                        char FAR * basename)
{
        char buf[1024];
        int filename_start = 0;
        int i;
        int ch, ch2;

        if (basename[0] != '\\' && basename[0] != '/'
                && (basename[0] == 0 || basename[1] != ':')) {
                strncpy(dest, basename, destsize);
                dest[destsize - 1] = 0;
                return strlen(dest);
        }

        GetModuleFileName(NULL, buf, sizeof(buf));
        for (i = 0; (ch = buf[i]) != 0; i++) {
                if (ch == '\\' || ch == '/' || ch == ':') {
                        filename_start = i + 1;
                }
        }

        for (i = 0; i < filename_start; i++) {
                ch = toupper(buf[i]);
                ch2 = toupper(basename[i]);

                if (ch == ch2
                        || ((ch == '\\' || ch == '/')
                                && (ch2 == '\\' || ch2 == '/'))) {
                } else {
                        break;
                }
        }

        if (i == filename_start) {
                strncpy(dest, basename + i, destsize);
        } else {
                strncpy(dest, basename, destsize);
        }
        dest[destsize - 1] = 0;
        return strlen(dest);
}

static void complete_setup_dlg(PTInstVar pvar, HWND dlg)
{
        char buf[4096];
        char buf2[1024];
        HWND compressionControl = GetDlgItem(dlg, IDC_SSHCOMPRESSIONLEVEL);
        HWND cipherControl = GetDlgItem(dlg, IDC_SSHCIPHERPREFS);
        int i, j, buf2index, bufindex;
        int count = (int) SendMessage(cipherControl, LB_GETCOUNT, 0, 0);

        pvar->settings.CompressionLevel =
                (int) SendMessage(compressionControl, TBM_GETPOS, 0, 0);

        buf2index = 0;
        for (i = 0; i < count; i++) {
                int len = SendMessage(cipherControl, LB_GETTEXTLEN, i, 0);

                if (len > 0 && len < sizeof(buf)) {     /* should always be true */
                        buf[0] = 0;
                        SendMessage(cipherControl, LB_GETTEXT, i, (LPARAM) buf);
                        for (j = 0;
                                 j <= SSH_CIPHER_MAX
                                 && strcmp(buf, get_cipher_name(j)) != 0; j++) {
                        }
                        if (j <= SSH_CIPHER_MAX) {
                                buf2[buf2index] = '0' + j;
                                buf2index++;
                        }
                }
        }
        buf2[buf2index] = 0;
        normalize_cipher_order(buf2);
        strcpy(pvar->settings.CipherOrder, buf2);

        buf[0] = 0;
        GetDlgItemText(dlg, IDC_READWRITEFILENAME, buf, sizeof(buf));
        j = copy_teraterm_dir_relative_path(pvar->settings.KnownHostsFiles,
                                                                                sizeof(pvar->settings.
                                                                                           KnownHostsFiles), buf);
        buf[0] = 0;
        bufindex = 0;
        GetDlgItemText(dlg, IDC_READONLYFILENAME, buf, sizeof(buf));
        for (i = 0; buf[i] != 0; i++) {
                if (buf[i] == ';') {
                        buf[i] = 0;
                        if (j < sizeof(pvar->settings.KnownHostsFiles) - 1) {
                                pvar->settings.KnownHostsFiles[j] = ';';
                                j++;
                                j += copy_teraterm_dir_relative_path(pvar->settings.
                                                                                                         KnownHostsFiles + j,
                                                                                                         sizeof(pvar->settings.
                                                                                                                        KnownHostsFiles)
                                                                                                         - j, buf + bufindex);
                        }
                        bufindex = i + 1;
                }
        }
        if (bufindex < i && j < sizeof(pvar->settings.KnownHostsFiles) - 1) {
                pvar->settings.KnownHostsFiles[j] = ';';
                j++;
                copy_teraterm_dir_relative_path(pvar->settings.KnownHostsFiles + j,
                                                                                sizeof(pvar->settings.
                                                                                           KnownHostsFiles) - j,
                                                                                buf + bufindex);
        }

        // get SSH HeartBeat(keep-alive)
        SendMessage(GetDlgItem(dlg, IDC_HEARTBEAT_EDIT), WM_GETTEXT, sizeof(buf), (LPARAM)buf);
        i = atoi(buf);
        if (i < 0)
                i = 60;
        pvar->settings.ssh_heartbeat_overtime = i;

}

static void move_cur_sel_delta(HWND listbox, int delta)
{
        int curPos = (int) SendMessage(listbox, LB_GETCURSEL, 0, 0);
        int maxPos = (int) SendMessage(listbox, LB_GETCOUNT, 0, 0) - 1;
        int newPos = curPos + delta;
        char buf[1024];

        if (curPos >= 0 && newPos >= 0 && newPos <= maxPos) {
                int len = SendMessage(listbox, LB_GETTEXTLEN, curPos, 0);

                if (len > 0 && len < sizeof(buf)) {     /* should always be true */
                        buf[0] = 0;
                        SendMessage(listbox, LB_GETTEXT, curPos, (LPARAM) buf);
                        SendMessage(listbox, LB_DELETESTRING, curPos, 0);
                        SendMessage(listbox, LB_INSERTSTRING, newPos,
                                                (LPARAM) (char FAR *) buf);
                        SendMessage(listbox, LB_SETCURSEL, newPos, 0);
                }
        }
}

static int get_keys_file_name(HWND parent, char FAR * buf, int bufsize,
                                                          int readonly)
{
#ifdef TERATERM32
        OPENFILENAME params;
        char fullname_buf[2048] = "ssh_known_hosts";

        params.lStructSize = sizeof(OPENFILENAME);
        params.hwndOwner = parent;
        params.lpstrFilter = NULL;
        params.lpstrCustomFilter = NULL;
        params.nFilterIndex = 0;
        buf[0] = 0;
        params.lpstrFile = fullname_buf;
        params.nMaxFile = sizeof(fullname_buf);
        params.lpstrFileTitle = NULL;
        params.lpstrInitialDir = NULL;
#ifdef I18N
        if (readonly) {
                strcpy(pvar->ts->UIMsg, "Choose a read-only known-hosts file to add");
                UTIL_get_lang_msg("MSG_OPEN_KNOWNHOSTS_RO_TITLE", pvar);
        }
        else {
                strcpy(pvar->ts->UIMsg, "Choose a read/write known-hosts file");
                UTIL_get_lang_msg("MSG_OPEN_KNOWNHOSTS_RW_TITLE", pvar);
        }
        params.lpstrTitle = pvar->ts->UIMsg;
#else
        params.lpstrTitle =
                readonly ? "Choose a read-only known-hosts file to add" :
                "Choose a read/write known-hosts file";
#endif
        params.Flags = (readonly ? OFN_FILEMUSTEXIST | OFN_PATHMUSTEXIST : 0)
                | OFN_HIDEREADONLY | (!readonly ? OFN_NOREADONLYRETURN : 0);
        params.lpstrDefExt = NULL;

        if (GetOpenFileName(&params) != 0) {
                copy_teraterm_dir_relative_path(buf, bufsize, fullname_buf);
                return 1;
        } else {
                int err = CommDlgExtendedError();

                if (err != 0) {
                        char buf[1024];
#ifdef I18N
                        strcpy(pvar->ts->UIMsg, "Cannot show file dialog box: error %d");
                        UTIL_get_lang_msg("MSG_OPEN_FILEDLG_KNOWNHOSTS_ERROR", pvar);
                        _snprintf(buf, sizeof(buf), pvar->ts->UIMsg, err);
#else
                        _snprintf(buf, sizeof(buf),
                                          "Cannot show file dialog box: error %d", err);
#endif
                        buf[sizeof(buf) - 1] = 0;
                        MessageBox(parent, buf, "TTSSH Error",
                                           MB_OK | MB_ICONEXCLAMATION);
                }

                return 0;
        }
#else
        return 0;
#endif
}

static void choose_read_write_file(HWND dlg)
{
        char buf[1024];

        if (get_keys_file_name(dlg, buf, sizeof(buf), 0)) {
                SetDlgItemText(dlg, IDC_READWRITEFILENAME, buf);
        }
}