trunk/Src/wptCryptdisk.cpp

/* wptCryptdisk.cpp
 *      Copyright (C) 2004, 2006 Timo Schulz
 *
 * This file is part of WinPT.
 *
 * WinPT is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * WinPT is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with WinPT; if not, write to the Free Software Foundation, 
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#if 0 /* disabled until the code really works on all systems. */
#include <windows.h>
#include <winioctl.h>
#include <stdio.h>
#include <ctype.h>

#include "resource.h"
#include "wptCryptdisk.h"
#include "wptTypes.h"
#include "wptW32API.h"
#include "wptNLS.h"
#include "wptErrors.h"

/*DWORD SHFormatDrive(HWND hwnd, UINT drive, UINT fmtID, UINT options);*/
typedef DWORD (WINAPI *sh_format_drive_p) (HWND, UINT, UINT, UINT);

static mount_list_t mounted=NULL;
static HMODULE shell32=NULL;
static sh_format_drive_p shfmt=NULL;


static int 
is_nt4 (void)
{
    static int nt_flag = -1;
    OSVERSIONINFO osinf;

    if (nt_flag != -1)
        return nt_flag;
    
    memset (&osinf, 0, sizeof osinf);
    osinf.dwOSVersionInfoSize = sizeof osinf;
    GetVersionEx (&osinf);
    if (osinf.dwPlatformId == VER_PLATFORM_WIN32_NT) {
        nt_flag = 1;
        shell32 = LoadLibrary ("SHELL32.DLL");
        shfmt = (sh_format_drive_p)GetProcAddress (shell32, "SHFormatDrive");
        if (!shfmt) 
            BUG (0);
    }
    else
        nt_flag = 0;
    return nt_flag;
}

static int
check_filedisk (void)
{
    HKEY hk;
    int rc = -1;

    rc = RegOpenKeyEx (HKEY_LOCAL_MACHINE, 
                       "SYSTEM\\CurrentControlSet\\Services\\FileDisk",
                       0, KEY_READ, &hk);
    if (rc == ERROR_SUCCESS) {
        RegCloseKey (hk);
        rc = 0;
    }
    return rc;
}


int
cryptdisk_available (void)
{
    return (is_nt4 () == 1 && check_filedisk () == 0)? 1 : 0;
}


void
cryptdisk_cleanup (void)
{
    if (shell32)
        FreeLibrary (shell32);
    shell32 = NULL;
}


static int
num_of_devices (void)
{
    HKEY hk;
    BYTE buf[32];
    DWORD n=0, type=0;
    int rc;

    rc = RegOpenKeyEx (HKEY_LOCAL_MACHINE,
                       "SYSTEM\\CurrentControlSet\\Services\\FileDisk\\Parameters",
                       0, KEY_READ, &hk);
    if (rc != ERROR_SUCCESS)
        return -1;

    n = sizeof buf-1;
    memset (buf, 0, sizeof buf);
    rc = RegQueryValueEx (hk, "NumberOfDevices", 0, &type, buf, &n);
    if (rc != ERROR_SUCCESS || type != REG_DWORD)
        n=0;
    else
        n = *buf;
    RegCloseKey (hk);
    return n;
}


static HWND
start_cryptdisk_server (HANDLE * r_proc)
{
    STARTUPINFO si;
    PROCESS_INFORMATION pi;

    memset (&si, 0, sizeof si);
    memset (&pi, 0, sizeof pi);
    si.cb = sizeof si;
    
    if (CreateProcess (NULL, "CryptdiskSrv", NULL, NULL, FALSE, 0,
                       NULL, NULL, &si, &pi) == FALSE) {
        msg_box (NULL, _("Could not execute Cryptdisk Server."),
                 _("Cryptdisk Error"), MB_ERR);
        return NULL;
    }
    *r_proc = pi.hProcess;
    Sleep (300);
    return FindWindow ("CryptdiskSrv", NULL);
}


static int
cryptdisk_mount (int devnum,
                 const char * imgfile,
                 DWORD size,
                 const char * hdlet)
{
    HWND h;
    HANDLE proc, wait_ev;
    COPYDATASTRUCT cds;
    struct private_ofi_s ofi;

    h = start_cryptdisk_server (&proc);
    if (!h)
        return WPTERR_GENERAL;
    memset (&ofi, 0, sizeof ofi);
    ofi.cmd = CMD_MOUNT;
    ofi.devnum = devnum;
    ofi.filesize.LowPart = size;
    ofi.drvlet = *hdlet;
    ofi.readonly = 0;
    strcpy ((char *)ofi.fname, imgfile);
    ofi.flen = strlen (imgfile);

    wait_ev = OpenEvent (SYNCHRONIZE, FALSE, "cryptdisksrv.wait");
    if (!wait_ev)
        BUG (0);
    memset (&cds, 0, sizeof cds);
    cds.cbData = sizeof ofi;
    cds.lpData = &ofi;
    SendMessage (h, WM_COPYDATA, (WPARAM)GetDesktopWindow (), (LPARAM)&cds);
    WaitForSingleObject (wait_ev, INFINITE);
    CloseHandle (wait_ev);
    CloseHandle (proc);
    return 0;
}


int
cryptdisk_unmount (char drivelet, int forced)
{
    HWND h;
    HANDLE proc;
    COPYDATASTRUCT cds;
    struct private_ofi_s ofi;

    h = start_cryptdisk_server (&proc);
    if (!h)
        return WPTERR_GENERAL;

    memset (&ofi, 0, sizeof ofi);
    ofi.cmd = CMD_UMOUNT;
    ofi.drvlet = drivelet;
    ofi.forced = forced;

    memset (&cds, 0, sizeof cds);
    cds.lpData = &ofi;
    cds.cbData = sizeof ofi;
    SendMessage (h, WM_COPYDATA, (WPARAM)GetDesktopWindow (), (LPARAM)&cds);
    CloseHandle (proc);

    return 0;
}

static void 
print_lasterr (char * prefix)
{
    LPVOID msg;

    FormatMessage(
        FORMAT_MESSAGE_ALLOCATE_BUFFER |
        FORMAT_MESSAGE_FROM_SYSTEM |
        FORMAT_MESSAGE_IGNORE_INSERTS,
        NULL,
        GetLastError(),
        0,
        (LPTSTR) &msg,
        0,
        NULL
        );
    MessageBox (NULL, (LPTSTR)msg, prefix, MB_ICONERROR|MB_OK);
    LocalFree (msg);
}


static int
filedisk_status (char drivelet, LARGE_INTEGER * size, int * rdonly)
{
    char                    VolumeName[] = "\\\\.\\ :";
    HANDLE                  Device;
    POPEN_FILE_INFORMATION  ofi;
    DWORD                   BytesReturned;
    int n= sizeof (OPEN_FILE_INFORMATION)+ MAX_PATH;

    VolumeName[4] = drivelet;

    Device = CreateFile (VolumeName,
                         GENERIC_READ,
                         FILE_SHARE_READ | FILE_SHARE_WRITE,
                         NULL,
                         OPEN_EXISTING,
                         FILE_FLAG_NO_BUFFERING,
                        NULL);

    if (Device == INVALID_HANDLE_VALUE) {
        print_lasterr(&VolumeName[4]);
        return WPTERR_CDISK_OPEN;
    }

    ofi = (POPEN_FILE_INFORMATION)malloc (n);

    if (!DeviceIoControl (Device,
                          IOCTL_FILE_DISK_QUERY_FILE,
                          NULL,
                          0,
                          ofi,
                          sizeof(OPEN_FILE_INFORMATION) + MAX_PATH,
                          &BytesReturned, NULL)) {
        print_lasterr (&VolumeName[4]);
        return WPTERR_CDISK_QUERY;
    }

    if (BytesReturned < sizeof(OPEN_FILE_INFORMATION)) {
        SetLastError (ERROR_INSUFFICIENT_BUFFER);
        print_lasterr (&VolumeName[4]);
        return WPTERR_CDISK_QUERY;
    }

    if (size)
        *size = ofi->FileSize;
    if (rdonly)
        *rdonly = ofi->ReadOnly;

    return 0;
}


static mount_list_t
new_mount_list (const char * drive, int devnum)
{
    mount_list_t n;

    n = (mount_list_t)calloc (1, sizeof *n);
    if (n) {
        strcpy (n->drive, drive);
        n->devnum = devnum;
        n->ttl = 1;
        filedisk_status (*drive, &n->size, &n->rdonly);
    }
    return n;
}


static mount_list_t
find_mount_list (mount_list_t root, const char * drive)
{
    mount_list_t n;

    for (n=root; n; n=n->next) {
        if (n->ttl == 0)
            continue;
        if (!strncmp (n->drive, drive, strlen (drive)))
            return n;
    }
    return NULL;
}


static void
add_mount_list (mount_list_t root, mount_list_t node)
{
    mount_list_t n;

    if (find_mount_list (root, node->drive))
        return;

    for (n=root; n->next; n=n->next)
        ;
    n->next = node;
}


static void
remove_mount_list (mount_list_t root, mount_list_t node)
{
    mount_list_t n;

    n = find_mount_list (root, node->drive);
    if (n)
        n->ttl = 0;
}


static void
free_mount_list (mount_list_t root)
{
    mount_list_t n;

    while (root) {
        n = root->next;
        free (root);
        root = n;
    }
}


static int
last_devnum (mount_list_t root)
{
    mount_list_t n;
    int devnum=0;

    if (!root)
        return 0;

    for (n=root; n; n=n->next) {
        if (devnum < n->devnum)
            devnum=n->devnum;
    }
    return devnum+1;
}


static char
init_drives (HWND dlg, int ctlid)
{
    char buf[512], drv[5];
    DWORD n=0, i=0;

    n=GetLogicalDriveStrings (sizeof buf-1, buf);
    for (i=0; i < n; i++) {
        memcpy (drv, buf+i, 3); drv[3]=0;
        i += 3;
    }
    if (!dlg && ctlid == -1)
        return ++drv[0];

    for (++drv[0]; drv[0] < 'Z'; drv[0]++)
        SendDlgItemMessage (dlg, ctlid, CB_ADDSTRING, 0,
                            (LPARAM)(const char *)drv);
    SendDlgItemMessage (dlg, ctlid, CB_SETCURSEL, 0, 0);
    return 0;
}


static int
check_freespace (const char * imgfile, DWORD size)
{
    ULARGE_INTEGER tocaller, total, totfree;
    char buf[128] = {0};

    if (!strchr (imgfile, ':'))
        GetCurrentDirectory (sizeof buf-1, buf);
    else
        strncpy (buf, imgfile, sizeof buf-1);
    buf[3] = '\0';
    GetDiskFreeSpaceEx (buf, &tocaller, &total, &totfree);
    if (size > tocaller.LowPart)
        return -1;
    return 0;
}


static void
do_check (HWND dlg)
{
    if (!cryptdisk_serv_run ()) { /* xxx */
        msg_box (dlg, _("The Cryptdisk service seems to be available but "
                        "it is not started yet.\nPlease start the service "
                        "and try again."), _("Cryptdisk Error"), MB_ERR);
        EndDialog (dlg, TRUE);
    }
}


BOOL CALLBACK
cryptdisk_new_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
{
    const char * ciphers [] = {
        "twofish",
        NULL
    };
    const char * s;
    char imgfile[128], key[128], drv[3];
    int i;
    DWORD size=0;

    switch (msg) {
    case WM_INITDIALOG:
        do_check (dlg);
        SetDlgItemInt (dlg, IDC_CDNEW_SIZE, DISK_DEFSIZE, FALSE);
        for (i=0; (s=ciphers[i]); i++)
            SendDlgItemMessage (dlg, IDC_CDNEW_CIPHERS, CB_ADDSTRING,
                                     0, (LPARAM)(const char *) s);
        SendDlgItemMessage (dlg, IDC_CDNEW_CIPHERS, CB_SETCURSEL, 0, 0);
        center_window (dlg, NULL);
        SetForegroundWindow (dlg);
        break;

    case WM_COMMAND:
        switch (LOWORD (wparam)) {
        case IDOK:
            i = GetDlgItemText (dlg, IDC_CDNEW_IMGFILE, imgfile, sizeof imgfile-1);
            if (!i) {
                msg_box (dlg, _("Please enter a name for the image file."),
                         _("Cryptdisk"), MB_ERR);
                return FALSE;
            }
            if (file_exist_check (imgfile) == 0) {
                i = msg_box (dlg, _("This volume file already exists.\n"
                                    "Do you want to overwrite it?"),
                            _("Cryptdisk Warning"), MB_YESNO|MB_WARN);
                if (i == IDNO)
                    return FALSE;
            }
            for (i=0; i < (int)strlen (imgfile); i++)
                imgfile[i] = toupper (imgfile[i]);
            size = GetDlgItemInt (dlg, IDC_CDNEW_SIZE, NULL, FALSE);
            if (!size) {
                msg_box (dlg, _("Please enter the size for the volume"),
                                _("Cryptdisk"), MB_INFO);
                return FALSE;
            }
            size *= 1024; /*KB*/
            if (check_freespace (imgfile, (size*1024))) {
                msg_box (dlg, _("There is not enough free disk space to "
                                "store the volume."), _("Cryptdisk"), MB_ERR);
                return FALSE;
            }
            i = GetDlgItemText (dlg, IDC_CDNEW_PASS, key, sizeof key-1);
            if (!i) {
                msg_box (dlg, _("Please enter a passphrase for the volume."),
                            _("Cryptdisk"), MB_ERR);
                return FALSE;
            }
            strcpy (drv, "?:\\");
            drv[0] = init_drives (NULL, -1); 
            i = cryptdisk_mount (last_devnum (mounted), imgfile, size, drv);
            if (!i)
                shfmt (dlg, drv[0] - 65, 0, 0);
            break;
        case IDCANCEL:
            EndDialog (dlg, FALSE);
            break;
        }
        break;

    }

    return FALSE;
}


BOOL CALLBACK
cryptdisk_mount_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
{
    const char * s_imgfile;
    char buf[8], drive[8], passwd[64], imgfile[128];
    int n, i, devnum=0;
    int rc;

    switch (msg) {
    case WM_INITDIALOG:
        do_check (dlg);
        s_imgfile = (const char *)lparam;
        if (s_imgfile)
            SetDlgItemText (dlg, IDC_CDMOUNT_IMGFILE, s_imgfile);
        init_drives (dlg, IDC_CDMOUNT_DRV);
        n = num_of_devices ();
        if (n == -1) {
            msg_box (dlg, _("Cannot determine the number of drives."),
                     _("Cryptdisk Error"), MB_ERR);
            EndDialog (dlg, FALSE);
        }
        for (i=last_devnum (mounted); i < n; i++) {
            sprintf (buf, "%d", i);
            SendDlgItemMessage (dlg, IDC_CDMOUNT_ID, CB_ADDSTRING, 0,
                                (LPARAM)(const char *)buf);
        }
        SendDlgItemMessage (dlg, IDC_CDMOUNT_ID, CB_SETCURSEL, 0, 0);
        center_window (dlg, NULL);
        SetForegroundWindow (dlg);
        break;

    case WM_COMMAND:
        switch (LOWORD (wparam)) {
        case IDC_CDMOUNT_SELFILE:
            s_imgfile = get_fileopen_dlg (dlg, _("Select Crypdisk Volume"), 
                                          NULL, NULL);
            if (s_imgfile != NULL)
                SetDlgItemText (dlg, IDC_CDMOUNT_IMGFILE, s_imgfile);
            break;

        case IDOK:
            n = item_get_text_length (dlg, IDC_CDMOUNT_IMGFILE);
            if (!n) {
                msg_box (dlg, _("Please enter the name of the image file."),
                         _("Cryptdisk Error"), MB_ERR);
                return FALSE;
            }
            n = item_get_text_length (dlg, IDC_CDMOUNT_PASS);
            if (!n) {
                msg_box (dlg, _("Please enter a password."), 
                         _("Cryptdisk Error"), MB_ERR);
                return FALSE;
            }
            devnum = GetDlgItemInt (dlg, IDC_CDMOUNT_ID, NULL, FALSE);
            GetDlgItemText (dlg, IDC_CDMOUNT_DRV, drive, sizeof drive-1);
            GetDlgItemText (dlg, IDC_CDMOUNT_PASS, passwd, sizeof passwd-1);
            GetDlgItemText (dlg, IDC_CDMOUNT_IMGFILE, imgfile, sizeof imgfile-1);
            if (file_exist_check  (imgfile)) {
                msg_box (dlg, _("Image file does not exist or could not be accessed."),
                         _("Cryptdisk Error"), MB_ERR);
                return FALSE;
            }
            rc = cryptdisk_mount (devnum, imgfile, 0, drive);
            if (!rc) {
                mount_list_t t = new_mount_list (drive, devnum);
                if (!mounted)
                    mounted = t;
                else
                    add_mount_list (mounted, t);
                EndDialog (dlg, TRUE);
            }
            else
                msg_box (dlg, winpt_strerror (rc), _("Cryptdisk Error"), MB_ERR);
            break;

        case IDCANCEL:
            EndDialog (dlg, FALSE);
            break;
        }
        break;
    }
    return FALSE;
}


static void
load_devs_from_mountlist (HWND dlg, int ctlid)
{
    mount_list_t n;
    char buf[128];

    if (!mounted)
        return;

    for (n=mounted; n; n=n->next) {
        if (n->ttl == 0)
            continue;
        _snprintf (buf, sizeof buf-1, _("Drive %s (ID %d); Size %d MB, Readonly=%s"), 
                    n->drive, n->devnum, n->size.LowPart/1024/1024, 
                    n->rdonly? "true" : "false");
        SendDlgItemMessage (dlg, ctlid, LB_ADDSTRING, 0, (LPARAM)(const char *)buf);
    }

}


static void
do_reaping (void)
{
    mount_list_t n;
    int ndevs=0, numount=0;

    for (n=mounted; n; n=n->next) {
        if (n->ttl == 0)
            numount++;
        ndevs++;
    }
    if (ndevs == numount) {
        free_mount_list (mounted);
        mounted = NULL;
    }
}


BOOL CALLBACK
cryptdisk_umount_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
{    
    mount_list_t vol;
    char buf[128];
    int n, rc=0;

    switch (msg) {
    case WM_INITDIALOG:
        do_check (dlg);
        load_devs_from_mountlist (dlg, IDC_CDUMOUNT_LIST);
        center_window (dlg, NULL);
        SetForegroundWindow (dlg);
        break;

    case WM_DESTROY:
        do_reaping ();
        break;

    case WM_COMMAND:
        switch (LOWORD (wparam)) {
        case IDOK:
            n = SendDlgItemMessage (dlg, IDC_CDUMOUNT_LIST, LB_GETCURSEL, 0, 0);
            if (n == LB_ERR) {
                msg_box (dlg, _("Please select one drive to umount."), _("Cryptdisk"), MB_INFO);
                return FALSE;
            }
            SendDlgItemMessage (dlg, IDC_CDUMOUNT_LIST, LB_GETTEXT, n, 
                                (LPARAM)(char *)buf);
            strcpy (buf, buf+6);
            buf[2] = '\0';
            vol = find_mount_list (mounted, buf);
            if (!vol)
                BUG (0);
            rc = cryptdisk_unmount (buf[0], 0);
            //if (rc == WPTERR_CDISK_LOCK)
        //      rc = cryptdisk_unmount (buf[0], 0);
            if (!rc) {
                SendDlgItemMessage (dlg, IDC_CDUMOUNT_LIST, LB_DELETESTRING, (WPARAM)n, 0);
                remove_mount_list (mounted, vol);
            }
            else
                msg_box (dlg, winpt_strerror (rc), _("Cryptdisk Error"), MB_ERR);
            break;
        case IDCANCEL:
            EndDialog (dlg, FALSE);
            break;
        }
        break;
    }

    return FALSE;
}


int
cryptdisk_serv_run (void)
{
    SC_HANDLE hd;
    ENUM_SERVICE_STATUS ess[4096];
    DWORD nservs=0, dummy=0;
    DWORD i;
    int rc=0;

    hd = OpenSCManager (NULL, NULL, SC_MANAGER_ENUMERATE_SERVICE);
    if (!hd)
        return 0;

    EnumServicesStatus (hd,  SERVICE_DRIVER, SERVICE_ACTIVE,
                        (LPENUM_SERVICE_STATUS)&ess,
                        sizeof ess-1, &dummy, &nservs, &dummy);

    for (i=0; i < nservs; i++) {
        if (!strnicmp ("FileDisk", ess[i].lpDisplayName, 8)) {
            rc = 1;
            break;
        }
    }

    CloseServiceHandle (hd);
    return rc;
}
#endif
1	werner	36	/* wptCryptdisk.cpp
2	twoaday	185	* Copyright (C) 2004, 2006 Timo Schulz
3	werner	36	*
4			* This file is part of WinPT.
5			*
6			* WinPT is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* WinPT is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with WinPT; if not, write to the Free Software Foundation,
18			* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
19			*/
20			#ifdef HAVE_CONFIG_H
21			#include <config.h>
22			#endif
23
24	twoaday	185	#if 0 /* disabled until the code really works on all systems. */
25	werner	36	#include <windows.h>
26			#include <winioctl.h>
27			#include <stdio.h>
28			#include <ctype.h>
29
30	werner	47	#include "resource.h"
31	werner	36	#include "wptCryptdisk.h"
32			#include "wptTypes.h"
33			#include "wptW32API.h"
34			#include "wptNLS.h"
35			#include "wptErrors.h"
36
37			/DWORD SHFormatDrive(HWND hwnd, UINT drive, UINT fmtID, UINT options);/
38			typedef DWORD (WINAPI *sh_format_drive_p) (HWND, UINT, UINT, UINT);
39
40			static mount_list_t mounted=NULL;
41			static HMODULE shell32=NULL;
42			static sh_format_drive_p shfmt=NULL;
43
44
45			static int
46			is_nt4 (void)
47			{
48			static int nt_flag = -1;
49			OSVERSIONINFO osinf;
50
51			if (nt_flag != -1)
52			return nt_flag;
53
54			memset (&osinf, 0, sizeof osinf);
55			osinf.dwOSVersionInfoSize = sizeof osinf;
56			GetVersionEx (&osinf);
57			if (osinf.dwPlatformId == VER_PLATFORM_WIN32_NT) {
58			nt_flag = 1;
59			shell32 = LoadLibrary ("SHELL32.DLL");
60			shfmt = (sh_format_drive_p)GetProcAddress (shell32, "SHFormatDrive");
61			if (!shfmt)
62			BUG (0);
63			}
64			else
65			nt_flag = 0;
66			return nt_flag;
67			}
68
69			static int
70			check_filedisk (void)
71			{
72			HKEY hk;
73			int rc = -1;
74
75			rc = RegOpenKeyEx (HKEY_LOCAL_MACHINE,
76			"SYSTEM\\CurrentControlSet\\Services\\FileDisk",
77			0, KEY_READ, &hk);
78			if (rc == ERROR_SUCCESS) {
79			RegCloseKey (hk);
80			rc = 0;
81			}
82			return rc;
83			}
84
85
86			int
87			cryptdisk_available (void)
88			{
89			return (is_nt4 () == 1 && check_filedisk () == 0)? 1 : 0;
90			}
91
92
93			void
94			cryptdisk_cleanup (void)
95			{
96			if (shell32)
97			FreeLibrary (shell32);
98			shell32 = NULL;
99			}
100
101
102			static int
103			num_of_devices (void)
104			{
105			HKEY hk;
106			BYTE buf[32];
107			DWORD n=0, type=0;
108			int rc;
109
110			rc = RegOpenKeyEx (HKEY_LOCAL_MACHINE,
111			"SYSTEM\\CurrentControlSet\\Services\\FileDisk\\Parameters",
112			0, KEY_READ, &hk);
113			if (rc != ERROR_SUCCESS)
114			return -1;
115
116			n = sizeof buf-1;
117			memset (buf, 0, sizeof buf);
118			rc = RegQueryValueEx (hk, "NumberOfDevices", 0, &type, buf, &n);
119			if (rc != ERROR_SUCCESS \|\| type != REG_DWORD)
120			n=0;
121			else
122			n = *buf;
123			RegCloseKey (hk);
124			return n;
125			}
126
127
128			static HWND
129			start_cryptdisk_server (HANDLE * r_proc)
130			{
131			STARTUPINFO si;
132			PROCESS_INFORMATION pi;
133
134			memset (&si, 0, sizeof si);
135			memset (&pi, 0, sizeof pi);
136			si.cb = sizeof si;
137
138			if (CreateProcess (NULL, "CryptdiskSrv", NULL, NULL, FALSE, 0,
139			NULL, NULL, &si, &pi) == FALSE) {
140			msg_box (NULL, _("Could not execute Cryptdisk Server."),
141			_("Cryptdisk Error"), MB_ERR);
142			return NULL;
143			}
144			*r_proc = pi.hProcess;
145			Sleep (300);
146			return FindWindow ("CryptdiskSrv", NULL);
147			}
148
149
150			static int
151			cryptdisk_mount (int devnum,
152			const char * imgfile,
153	twoaday	193	DWORD size,
154	werner	36	const char * hdlet)
155			{
156			HWND h;
157			HANDLE proc, wait_ev;
158			COPYDATASTRUCT cds;
159			struct private_ofi_s ofi;
160
161			h = start_cryptdisk_server (&proc);
162			if (!h)
163			return WPTERR_GENERAL;
164			memset (&ofi, 0, sizeof ofi);
165			ofi.cmd = CMD_MOUNT;
166			ofi.devnum = devnum;
167			ofi.filesize.LowPart = size;
168			ofi.drvlet = *hdlet;
169			ofi.readonly = 0;
170			strcpy ((char *)ofi.fname, imgfile);
171			ofi.flen = strlen (imgfile);
172
173			wait_ev = OpenEvent (SYNCHRONIZE, FALSE, "cryptdisksrv.wait");
174			if (!wait_ev)
175			BUG (0);
176			memset (&cds, 0, sizeof cds);
177			cds.cbData = sizeof ofi;
178			cds.lpData = &ofi;
179			SendMessage (h, WM_COPYDATA, (WPARAM)GetDesktopWindow (), (LPARAM)&cds);
180			WaitForSingleObject (wait_ev, INFINITE);
181			CloseHandle (wait_ev);
182			CloseHandle (proc);
183			return 0;
184			}
185
186
187
188			int
189			cryptdisk_unmount (char drivelet, int forced)
190			{
191			HWND h;
192			HANDLE proc;
193			COPYDATASTRUCT cds;
194			struct private_ofi_s ofi;
195
196			h = start_cryptdisk_server (&proc);
197			if (!h)
198			return WPTERR_GENERAL;
199
200			memset (&ofi, 0, sizeof ofi);
201			ofi.cmd = CMD_UMOUNT;
202			ofi.drvlet = drivelet;
203			ofi.forced = forced;
204
205			memset (&cds, 0, sizeof cds);
206			cds.lpData = &ofi;
207			cds.cbData = sizeof ofi;
208			SendMessage (h, WM_COPYDATA, (WPARAM)GetDesktopWindow (), (LPARAM)&cds);
209			CloseHandle (proc);
210
211			return 0;
212			}
213
214			static void
215			print_lasterr (char * prefix)
216			{
217			LPVOID msg;
218
219			FormatMessage(
220			FORMAT_MESSAGE_ALLOCATE_BUFFER \|
221			FORMAT_MESSAGE_FROM_SYSTEM \|
222			FORMAT_MESSAGE_IGNORE_INSERTS,
223			NULL,
224			GetLastError(),
225			0,
226			(LPTSTR) &msg,
227			0,
228			NULL
229			);
230			MessageBox (NULL, (LPTSTR)msg, prefix, MB_ICONERROR\|MB_OK);
231			LocalFree (msg);
232			}
233
234
235			static int
236			filedisk_status (char drivelet, LARGE_INTEGER * size, int * rdonly)
237			{
238			char VolumeName[] = "\\\\.\\ :";
239			HANDLE Device;
240			POPEN_FILE_INFORMATION ofi;
241			DWORD BytesReturned;
242			int n= sizeof (OPEN_FILE_INFORMATION)+ MAX_PATH;
243
244			VolumeName[4] = drivelet;
245
246			Device = CreateFile (VolumeName,
247			GENERIC_READ,
248			FILE_SHARE_READ \| FILE_SHARE_WRITE,
249			NULL,
250			OPEN_EXISTING,
251			FILE_FLAG_NO_BUFFERING,
252			NULL);
253
254			if (Device == INVALID_HANDLE_VALUE) {
255			print_lasterr(&VolumeName[4]);
256			return WPTERR_CDISK_OPEN;
257			}
258
259			ofi = (POPEN_FILE_INFORMATION)malloc (n);
260
261			if (!DeviceIoControl (Device,
262			IOCTL_FILE_DISK_QUERY_FILE,
263			NULL,
264			0,
265			ofi,
266			sizeof(OPEN_FILE_INFORMATION) + MAX_PATH,
267			&BytesReturned, NULL)) {
268			print_lasterr (&VolumeName[4]);
269			return WPTERR_CDISK_QUERY;
270			}
271
272			if (BytesReturned < sizeof(OPEN_FILE_INFORMATION)) {
273			SetLastError (ERROR_INSUFFICIENT_BUFFER);
274			print_lasterr (&VolumeName[4]);
275			return WPTERR_CDISK_QUERY;
276			}
277
278			if (size)
279			*size = ofi->FileSize;
280			if (rdonly)
281			*rdonly = ofi->ReadOnly;
282
283			return 0;
284			}
285
286
287			static mount_list_t
288			new_mount_list (const char * drive, int devnum)
289			{
290			mount_list_t n;
291
292			n = (mount_list_t)calloc (1, sizeof *n);
293			if (n) {
294			strcpy (n->drive, drive);
295			n->devnum = devnum;
296			n->ttl = 1;
297			filedisk_status (*drive, &n->size, &n->rdonly);
298			}
299			return n;
300			}
301
302
303			static mount_list_t
304			find_mount_list (mount_list_t root, const char * drive)
305			{
306			mount_list_t n;
307
308			for (n=root; n; n=n->next) {
309			if (n->ttl == 0)
310			continue;
311			if (!strncmp (n->drive, drive, strlen (drive)))
312			return n;
313			}
314			return NULL;
315			}
316
317
318			static void
319			add_mount_list (mount_list_t root, mount_list_t node)
320			{
321			mount_list_t n;
322
323			if (find_mount_list (root, node->drive))
324			return;
325
326			for (n=root; n->next; n=n->next)
327			;
328			n->next = node;
329			}
330
331
332			static void
333			remove_mount_list (mount_list_t root, mount_list_t node)
334			{
335			mount_list_t n;
336
337			n = find_mount_list (root, node->drive);
338			if (n)
339			n->ttl = 0;
340			}
341
342
343			static void
344			free_mount_list (mount_list_t root)
345			{
346			mount_list_t n;
347
348			while (root) {
349			n = root->next;
350			free (root);
351			root = n;
352			}
353			}
354
355
356			static int
357			last_devnum (mount_list_t root)
358			{
359			mount_list_t n;
360			int devnum=0;
361
362			if (!root)
363			return 0;
364
365			for (n=root; n; n=n->next) {
366			if (devnum < n->devnum)
367			devnum=n->devnum;
368			}
369			return devnum+1;
370			}
371
372
373			static char
374			init_drives (HWND dlg, int ctlid)
375			{
376			char buf[512], drv[5];
377			DWORD n=0, i=0;
378
379			n=GetLogicalDriveStrings (sizeof buf-1, buf);
380			for (i=0; i < n; i++) {
381			memcpy (drv, buf+i, 3); drv[3]=0;
382			i += 3;
383			}
384			if (!dlg && ctlid == -1)
385			return ++drv[0];
386
387			for (++drv[0]; drv[0] < 'Z'; drv[0]++)
388			SendDlgItemMessage (dlg, ctlid, CB_ADDSTRING, 0,
389			(LPARAM)(const char *)drv);
390			SendDlgItemMessage (dlg, ctlid, CB_SETCURSEL, 0, 0);
391			return 0;
392			}
393
394
395			static int
396	twoaday	193	check_freespace (const char * imgfile, DWORD size)
397	werner	36	{
398			ULARGE_INTEGER tocaller, total, totfree;
399			char buf[128] = {0};
400
401			if (!strchr (imgfile, ':'))
402			GetCurrentDirectory (sizeof buf-1, buf);
403			else
404			strncpy (buf, imgfile, sizeof buf-1);
405			buf[3] = '\0';
406			GetDiskFreeSpaceEx (buf, &tocaller, &total, &totfree);
407			if (size > tocaller.LowPart)
408			return -1;
409			return 0;
410			}
411
412
413			static void
414			do_check (HWND dlg)
415			{
416			if (!cryptdisk_serv_run ()) { /* xxx */
417			msg_box (dlg, _("The Cryptdisk service seems to be available but "
418			"it is not started yet.\nPlease start the service "
419			"and try again."), _("Cryptdisk Error"), MB_ERR);
420			EndDialog (dlg, TRUE);
421			}
422			}
423
424
425			BOOL CALLBACK
426			cryptdisk_new_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
427			{
428			const char * ciphers [] = {
429			"twofish",
430			NULL
431			};
432			const char * s;
433			char imgfile[128], key[128], drv[3];
434			int i;
435	twoaday	193	DWORD size=0;
436	werner	36
437			switch (msg) {
438			case WM_INITDIALOG:
439			do_check (dlg);
440			SetDlgItemInt (dlg, IDC_CDNEW_SIZE, DISK_DEFSIZE, FALSE);
441			for (i=0; (s=ciphers[i]); i++)
442			SendDlgItemMessage (dlg, IDC_CDNEW_CIPHERS, CB_ADDSTRING,
443			0, (LPARAM)(const char *) s);
444			SendDlgItemMessage (dlg, IDC_CDNEW_CIPHERS, CB_SETCURSEL, 0, 0);
445			center_window (dlg, NULL);
446			SetForegroundWindow (dlg);
447			break;
448
449			case WM_COMMAND:
450			switch (LOWORD (wparam)) {
451			case IDOK:
452			i = GetDlgItemText (dlg, IDC_CDNEW_IMGFILE, imgfile, sizeof imgfile-1);
453			if (!i) {
454			msg_box (dlg, _("Please enter a name for the image file."),
455			_("Cryptdisk"), MB_ERR);
456			return FALSE;
457			}
458			if (file_exist_check (imgfile) == 0) {
459			i = msg_box (dlg, _("This volume file already exists.\n"
460			"Do you want to overwrite it?"),
461			_("Cryptdisk Warning"), MB_YESNO\|MB_WARN);
462			if (i == IDNO)
463			return FALSE;
464			}
465			for (i=0; i < (int)strlen (imgfile); i++)
466			imgfile[i] = toupper (imgfile[i]);
467			size = GetDlgItemInt (dlg, IDC_CDNEW_SIZE, NULL, FALSE);
468			if (!size) {
469			msg_box (dlg, _("Please enter the size for the volume"),
470			_("Cryptdisk"), MB_INFO);
471			return FALSE;
472			}
473			size = 1024; /KB*/
474			if (check_freespace (imgfile, (size*1024))) {
475			msg_box (dlg, _("There is not enough free disk space to "
476			"store the volume."), _("Cryptdisk"), MB_ERR);
477			return FALSE;
478			}
479			i = GetDlgItemText (dlg, IDC_CDNEW_PASS, key, sizeof key-1);
480			if (!i) {
481			msg_box (dlg, _("Please enter a passphrase for the volume."),
482			_("Cryptdisk"), MB_ERR);
483			return FALSE;
484			}
485			strcpy (drv, "?:\\");
486			drv[0] = init_drives (NULL, -1);
487			i = cryptdisk_mount (last_devnum (mounted), imgfile, size, drv);
488			if (!i)
489			shfmt (dlg, drv[0] - 65, 0, 0);
490			break;
491			case IDCANCEL:
492			EndDialog (dlg, FALSE);
493			break;
494			}
495			break;
496
497			}
498
499			return FALSE;
500			}
501
502
503			BOOL CALLBACK
504			cryptdisk_mount_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
505			{
506			const char * s_imgfile;
507			char buf[8], drive[8], passwd[64], imgfile[128];
508			int n, i, devnum=0;
509			int rc;
510
511			switch (msg) {
512			case WM_INITDIALOG:
513			do_check (dlg);
514			s_imgfile = (const char *)lparam;
515			if (s_imgfile)
516			SetDlgItemText (dlg, IDC_CDMOUNT_IMGFILE, s_imgfile);
517			init_drives (dlg, IDC_CDMOUNT_DRV);
518			n = num_of_devices ();
519			if (n == -1) {
520			msg_box (dlg, _("Cannot determine the number of drives."),
521			_("Cryptdisk Error"), MB_ERR);
522			EndDialog (dlg, FALSE);
523			}
524			for (i=last_devnum (mounted); i < n; i++) {
525			sprintf (buf, "%d", i);
526			SendDlgItemMessage (dlg, IDC_CDMOUNT_ID, CB_ADDSTRING, 0,
527			(LPARAM)(const char *)buf);
528			}
529			SendDlgItemMessage (dlg, IDC_CDMOUNT_ID, CB_SETCURSEL, 0, 0);
530			center_window (dlg, NULL);
531			SetForegroundWindow (dlg);
532			break;
533
534			case WM_COMMAND:
535			switch (LOWORD (wparam)) {
536			case IDC_CDMOUNT_SELFILE:
537			s_imgfile = get_fileopen_dlg (dlg, _("Select Crypdisk Volume"),
538			NULL, NULL);
539			if (s_imgfile != NULL)
540			SetDlgItemText (dlg, IDC_CDMOUNT_IMGFILE, s_imgfile);
541			break;
542
543			case IDOK:
544			n = item_get_text_length (dlg, IDC_CDMOUNT_IMGFILE);
545			if (!n) {
546			msg_box (dlg, _("Please enter the name of the image file."),
547			_("Cryptdisk Error"), MB_ERR);
548			return FALSE;
549			}
550			n = item_get_text_length (dlg, IDC_CDMOUNT_PASS);
551			if (!n) {
552			msg_box (dlg, _("Please enter a password."),
553			_("Cryptdisk Error"), MB_ERR);
554			return FALSE;
555			}
556			devnum = GetDlgItemInt (dlg, IDC_CDMOUNT_ID, NULL, FALSE);
557			GetDlgItemText (dlg, IDC_CDMOUNT_DRV, drive, sizeof drive-1);
558			GetDlgItemText (dlg, IDC_CDMOUNT_PASS, passwd, sizeof passwd-1);
559			GetDlgItemText (dlg, IDC_CDMOUNT_IMGFILE, imgfile, sizeof imgfile-1);
560			if (file_exist_check (imgfile)) {
561			msg_box (dlg, _("Image file does not exist or could not be accessed."),
562			_("Cryptdisk Error"), MB_ERR);
563			return FALSE;
564			}
565			rc = cryptdisk_mount (devnum, imgfile, 0, drive);
566			if (!rc) {
567	twoaday	77	mount_list_t t = new_mount_list (drive, devnum);
568	werner	36	if (!mounted)
569	twoaday	77	mounted = t;
570	werner	36	else
571	twoaday	77	add_mount_list (mounted, t);
572	werner	36	EndDialog (dlg, TRUE);
573			}
574			else
575			msg_box (dlg, winpt_strerror (rc), _("Cryptdisk Error"), MB_ERR);
576			break;
577
578			case IDCANCEL:
579			EndDialog (dlg, FALSE);
580			break;
581			}
582			break;
583			}
584			return FALSE;
585			}
586
587
588			static void
589			load_devs_from_mountlist (HWND dlg, int ctlid)
590			{
591			mount_list_t n;
592			char buf[128];
593
594			if (!mounted)
595			return;
596
597			for (n=mounted; n; n=n->next) {
598			if (n->ttl == 0)
599			continue;
600			_snprintf (buf, sizeof buf-1, _("Drive %s (ID %d); Size %d MB, Readonly=%s"),
601			n->drive, n->devnum, n->size.LowPart/1024/1024,
602			n->rdonly? "true" : "false");
603			SendDlgItemMessage (dlg, ctlid, LB_ADDSTRING, 0, (LPARAM)(const char *)buf);
604			}
605
606			}
607
608
609			static void
610			do_reaping (void)
611			{
612			mount_list_t n;
613			int ndevs=0, numount=0;
614
615			for (n=mounted; n; n=n->next) {
616			if (n->ttl == 0)
617			numount++;
618			ndevs++;
619			}
620			if (ndevs == numount) {
621			free_mount_list (mounted);
622			mounted = NULL;
623			}
624			}
625
626
627			BOOL CALLBACK
628			cryptdisk_umount_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
629			{
630			mount_list_t vol;
631			char buf[128];
632			int n, rc=0;
633
634			switch (msg) {
635			case WM_INITDIALOG:
636			do_check (dlg);
637			load_devs_from_mountlist (dlg, IDC_CDUMOUNT_LIST);
638			center_window (dlg, NULL);
639			SetForegroundWindow (dlg);
640			break;
641
642			case WM_DESTROY:
643			do_reaping ();
644			break;
645
646			case WM_COMMAND:
647			switch (LOWORD (wparam)) {
648			case IDOK:
649			n = SendDlgItemMessage (dlg, IDC_CDUMOUNT_LIST, LB_GETCURSEL, 0, 0);
650			if (n == LB_ERR) {
651			msg_box (dlg, _("Please select one drive to umount."), _("Cryptdisk"), MB_INFO);
652			return FALSE;
653			}
654			SendDlgItemMessage (dlg, IDC_CDUMOUNT_LIST, LB_GETTEXT, n,
655			(LPARAM)(char *)buf);
656			strcpy (buf, buf+6);
657			buf[2] = '\0';
658			vol = find_mount_list (mounted, buf);
659			if (!vol)
660			BUG (0);
661			rc = cryptdisk_unmount (buf[0], 0);
662			//if (rc == WPTERR_CDISK_LOCK)
663			// rc = cryptdisk_unmount (buf[0], 0);
664			if (!rc) {
665			SendDlgItemMessage (dlg, IDC_CDUMOUNT_LIST, LB_DELETESTRING, (WPARAM)n, 0);
666			remove_mount_list (mounted, vol);
667			}
668			else
669			msg_box (dlg, winpt_strerror (rc), _("Cryptdisk Error"), MB_ERR);
670			break;
671			case IDCANCEL:
672			EndDialog (dlg, FALSE);
673			break;
674			}
675			break;
676			}
677
678			return FALSE;
679			}
680
681
682			int
683			cryptdisk_serv_run (void)
684			{
685			SC_HANDLE hd;
686			ENUM_SERVICE_STATUS ess[4096];
687			DWORD nservs=0, dummy=0;
688			DWORD i;
689			int rc=0;
690
691			hd = OpenSCManager (NULL, NULL, SC_MANAGER_ENUMERATE_SERVICE);
692			if (!hd)
693			return 0;
694
695			EnumServicesStatus (hd, SERVICE_DRIVER, SERVICE_ACTIVE,
696			(LPENUM_SERVICE_STATUS)&ess,
697			sizeof ess-1, &dummy, &nservs, &dummy);
698
699			for (i=0; i < nservs; i++) {
700			if (!strnicmp ("FileDisk", ess[i].lpDisplayName, 8)) {
701			rc = 1;
702			break;
703			}
704			}
705
706			CloseServiceHandle (hd);
707			return rc;
708			}
709	twoaday	185	#endif