trunk/Src/wptCryptdisk.cpp

/* wptCryptdisk.cpp
 *      Copyright (C) 2004 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

#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,
                 u32 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, u32 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;
    u32 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;
}

1	werner	36	/* wptCryptdisk.cpp
2			* Copyright (C) 2004 Timo Schulz
3			*
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			#include <windows.h>
25			#include <winioctl.h>
26			#include <stdio.h>
27			#include <ctype.h>
28
29	werner	47	#include "resource.h"
30	werner	36	#include "wptCryptdisk.h"
31			#include "wptTypes.h"
32			#include "wptW32API.h"
33			#include "wptNLS.h"
34			#include "wptErrors.h"
35
36			/DWORD SHFormatDrive(HWND hwnd, UINT drive, UINT fmtID, UINT options);/
37			typedef DWORD (WINAPI *sh_format_drive_p) (HWND, UINT, UINT, UINT);
38
39			static mount_list_t mounted=NULL;
40			static HMODULE shell32=NULL;
41			static sh_format_drive_p shfmt=NULL;
42
43
44			static int
45			is_nt4 (void)
46			{
47			static int nt_flag = -1;
48			OSVERSIONINFO osinf;
49
50			if (nt_flag != -1)
51			return nt_flag;
52
53			memset (&osinf, 0, sizeof osinf);
54			osinf.dwOSVersionInfoSize = sizeof osinf;
55			GetVersionEx (&osinf);
56			if (osinf.dwPlatformId == VER_PLATFORM_WIN32_NT) {
57			nt_flag = 1;
58			shell32 = LoadLibrary ("SHELL32.DLL");
59			shfmt = (sh_format_drive_p)GetProcAddress (shell32, "SHFormatDrive");
60			if (!shfmt)
61			BUG (0);
62			}
63			else
64			nt_flag = 0;
65			return nt_flag;
66			}
67
68			static int
69			check_filedisk (void)
70			{
71			HKEY hk;
72			int rc = -1;
73
74			rc = RegOpenKeyEx (HKEY_LOCAL_MACHINE,
75			"SYSTEM\\CurrentControlSet\\Services\\FileDisk",
76			0, KEY_READ, &hk);
77			if (rc == ERROR_SUCCESS) {
78			RegCloseKey (hk);
79			rc = 0;
80			}
81			return rc;
82			}
83
84
85			int
86			cryptdisk_available (void)
87			{
88			return (is_nt4 () == 1 && check_filedisk () == 0)? 1 : 0;
89			}
90
91
92			void
93			cryptdisk_cleanup (void)
94			{
95			if (shell32)
96			FreeLibrary (shell32);
97			shell32 = NULL;
98			}
99
100
101			static int
102			num_of_devices (void)
103			{
104			HKEY hk;
105			BYTE buf[32];
106			DWORD n=0, type=0;
107			int rc;
108
109			rc = RegOpenKeyEx (HKEY_LOCAL_MACHINE,
110			"SYSTEM\\CurrentControlSet\\Services\\FileDisk\\Parameters",
111			0, KEY_READ, &hk);
112			if (rc != ERROR_SUCCESS)
113			return -1;
114
115			n = sizeof buf-1;
116			memset (buf, 0, sizeof buf);
117			rc = RegQueryValueEx (hk, "NumberOfDevices", 0, &type, buf, &n);
118			if (rc != ERROR_SUCCESS \|\| type != REG_DWORD)
119			n=0;
120			else
121			n = *buf;
122			RegCloseKey (hk);
123			return n;
124			}
125
126
127			static HWND
128			start_cryptdisk_server (HANDLE * r_proc)
129			{
130			STARTUPINFO si;
131			PROCESS_INFORMATION pi;
132
133			memset (&si, 0, sizeof si);
134			memset (&pi, 0, sizeof pi);
135			si.cb = sizeof si;
136
137			if (CreateProcess (NULL, "CryptdiskSrv", NULL, NULL, FALSE, 0,
138			NULL, NULL, &si, &pi) == FALSE) {
139			msg_box (NULL, _("Could not execute Cryptdisk Server."),
140			_("Cryptdisk Error"), MB_ERR);
141			return NULL;
142			}
143			*r_proc = pi.hProcess;
144			Sleep (300);
145			return FindWindow ("CryptdiskSrv", NULL);
146			}
147
148
149			static int
150			cryptdisk_mount (int devnum,
151			const char * imgfile,
152			u32 size,
153			const char * hdlet)
154			{
155			HWND h;
156			HANDLE proc, wait_ev;
157			COPYDATASTRUCT cds;
158			struct private_ofi_s ofi;
159
160			h = start_cryptdisk_server (&proc);
161			if (!h)
162			return WPTERR_GENERAL;
163			memset (&ofi, 0, sizeof ofi);
164			ofi.cmd = CMD_MOUNT;
165			ofi.devnum = devnum;
166			ofi.filesize.LowPart = size;
167			ofi.drvlet = *hdlet;
168			ofi.readonly = 0;
169			strcpy ((char *)ofi.fname, imgfile);
170			ofi.flen = strlen (imgfile);
171
172			wait_ev = OpenEvent (SYNCHRONIZE, FALSE, "cryptdisksrv.wait");
173			if (!wait_ev)
174			BUG (0);
175			memset (&cds, 0, sizeof cds);
176			cds.cbData = sizeof ofi;
177			cds.lpData = &ofi;
178			SendMessage (h, WM_COPYDATA, (WPARAM)GetDesktopWindow (), (LPARAM)&cds);
179			WaitForSingleObject (wait_ev, INFINITE);
180			CloseHandle (wait_ev);
181			CloseHandle (proc);
182			return 0;
183			}
184
185
186
187			int
188			cryptdisk_unmount (char drivelet, int forced)
189			{
190			HWND h;
191			HANDLE proc;
192			COPYDATASTRUCT cds;
193			struct private_ofi_s ofi;
194
195			h = start_cryptdisk_server (&proc);
196			if (!h)
197			return WPTERR_GENERAL;
198
199			memset (&ofi, 0, sizeof ofi);
200			ofi.cmd = CMD_UMOUNT;
201			ofi.drvlet = drivelet;
202			ofi.forced = forced;
203
204			memset (&cds, 0, sizeof cds);
205			cds.lpData = &ofi;
206			cds.cbData = sizeof ofi;
207			SendMessage (h, WM_COPYDATA, (WPARAM)GetDesktopWindow (), (LPARAM)&cds);
208			CloseHandle (proc);
209
210			return 0;
211			}
212
213			static void
214			print_lasterr (char * prefix)
215			{
216			LPVOID msg;
217
218			FormatMessage(
219			FORMAT_MESSAGE_ALLOCATE_BUFFER \|
220			FORMAT_MESSAGE_FROM_SYSTEM \|
221			FORMAT_MESSAGE_IGNORE_INSERTS,
222			NULL,
223			GetLastError(),
224			0,
225			(LPTSTR) &msg,
226			0,
227			NULL
228			);
229			MessageBox (NULL, (LPTSTR)msg, prefix, MB_ICONERROR\|MB_OK);
230			LocalFree (msg);
231			}
232
233
234			static int
235			filedisk_status (char drivelet, LARGE_INTEGER * size, int * rdonly)
236			{
237			char VolumeName[] = "\\\\.\\ :";
238			HANDLE Device;
239			POPEN_FILE_INFORMATION ofi;
240			DWORD BytesReturned;
241			int n= sizeof (OPEN_FILE_INFORMATION)+ MAX_PATH;
242
243			VolumeName[4] = drivelet;
244
245			Device = CreateFile (VolumeName,
246			GENERIC_READ,
247			FILE_SHARE_READ \| FILE_SHARE_WRITE,
248			NULL,
249			OPEN_EXISTING,
250			FILE_FLAG_NO_BUFFERING,
251			NULL);
252
253			if (Device == INVALID_HANDLE_VALUE) {
254			print_lasterr(&VolumeName[4]);
255			return WPTERR_CDISK_OPEN;
256			}
257
258			ofi = (POPEN_FILE_INFORMATION)malloc (n);
259
260			if (!DeviceIoControl (Device,
261			IOCTL_FILE_DISK_QUERY_FILE,
262			NULL,
263			0,
264			ofi,
265			sizeof(OPEN_FILE_INFORMATION) + MAX_PATH,
266			&BytesReturned, NULL)) {
267			print_lasterr (&VolumeName[4]);
268			return WPTERR_CDISK_QUERY;
269			}
270
271			if (BytesReturned < sizeof(OPEN_FILE_INFORMATION)) {
272			SetLastError (ERROR_INSUFFICIENT_BUFFER);
273			print_lasterr (&VolumeName[4]);
274			return WPTERR_CDISK_QUERY;
275			}
276
277			if (size)
278			*size = ofi->FileSize;
279			if (rdonly)
280			*rdonly = ofi->ReadOnly;
281
282			return 0;
283			}
284
285
286			static mount_list_t
287			new_mount_list (const char * drive, int devnum)
288			{
289			mount_list_t n;
290
291			n = (mount_list_t)calloc (1, sizeof *n);
292			if (n) {
293			strcpy (n->drive, drive);
294			n->devnum = devnum;
295			n->ttl = 1;
296			filedisk_status (*drive, &n->size, &n->rdonly);
297			}
298			return n;
299			}
300
301
302			static mount_list_t
303			find_mount_list (mount_list_t root, const char * drive)
304			{
305			mount_list_t n;
306
307			for (n=root; n; n=n->next) {
308			if (n->ttl == 0)
309			continue;
310			if (!strncmp (n->drive, drive, strlen (drive)))
311			return n;
312			}
313			return NULL;
314			}
315
316
317			static void
318			add_mount_list (mount_list_t root, mount_list_t node)
319			{
320			mount_list_t n;
321
322			if (find_mount_list (root, node->drive))
323			return;
324
325			for (n=root; n->next; n=n->next)
326			;
327			n->next = node;
328			}
329
330
331			static void
332			remove_mount_list (mount_list_t root, mount_list_t node)
333			{
334			mount_list_t n;
335
336			n = find_mount_list (root, node->drive);
337			if (n)
338			n->ttl = 0;
339			}
340
341
342			static void
343			free_mount_list (mount_list_t root)
344			{
345			mount_list_t n;
346
347			while (root) {
348			n = root->next;
349			free (root);
350			root = n;
351			}
352			}
353
354
355			static int
356			last_devnum (mount_list_t root)
357			{
358			mount_list_t n;
359			int devnum=0;
360
361			if (!root)
362			return 0;
363
364			for (n=root; n; n=n->next) {
365			if (devnum < n->devnum)
366			devnum=n->devnum;
367			}
368			return devnum+1;
369			}
370
371
372			static char
373			init_drives (HWND dlg, int ctlid)
374			{
375			char buf[512], drv[5];
376			DWORD n=0, i=0;
377
378			n=GetLogicalDriveStrings (sizeof buf-1, buf);
379			for (i=0; i < n; i++) {
380			memcpy (drv, buf+i, 3); drv[3]=0;
381			i += 3;
382			}
383			if (!dlg && ctlid == -1)
384			return ++drv[0];
385
386			for (++drv[0]; drv[0] < 'Z'; drv[0]++)
387			SendDlgItemMessage (dlg, ctlid, CB_ADDSTRING, 0,
388			(LPARAM)(const char *)drv);
389			SendDlgItemMessage (dlg, ctlid, CB_SETCURSEL, 0, 0);
390			return 0;
391			}
392
393
394			static int
395			check_freespace (const char * imgfile, u32 size)
396			{
397			ULARGE_INTEGER tocaller, total, totfree;
398			char buf[128] = {0};
399
400			if (!strchr (imgfile, ':'))
401			GetCurrentDirectory (sizeof buf-1, buf);
402			else
403			strncpy (buf, imgfile, sizeof buf-1);
404			buf[3] = '\0';
405			GetDiskFreeSpaceEx (buf, &tocaller, &total, &totfree);
406			if (size > tocaller.LowPart)
407			return -1;
408			return 0;
409			}
410
411
412			static void
413			do_check (HWND dlg)
414			{
415			if (!cryptdisk_serv_run ()) { /* xxx */
416			msg_box (dlg, _("The Cryptdisk service seems to be available but "
417			"it is not started yet.\nPlease start the service "
418			"and try again."), _("Cryptdisk Error"), MB_ERR);
419			EndDialog (dlg, TRUE);
420			}
421			}
422
423
424			BOOL CALLBACK
425			cryptdisk_new_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
426			{
427			const char * ciphers [] = {
428			"twofish",
429			NULL
430			};
431			const char * s;
432			char imgfile[128], key[128], drv[3];
433			int i;
434			u32 size=0;
435
436			switch (msg) {
437			case WM_INITDIALOG:
438			do_check (dlg);
439			SetDlgItemInt (dlg, IDC_CDNEW_SIZE, DISK_DEFSIZE, FALSE);
440			for (i=0; (s=ciphers[i]); i++)
441			SendDlgItemMessage (dlg, IDC_CDNEW_CIPHERS, CB_ADDSTRING,
442			0, (LPARAM)(const char *) s);
443			SendDlgItemMessage (dlg, IDC_CDNEW_CIPHERS, CB_SETCURSEL, 0, 0);
444			center_window (dlg, NULL);
445			SetForegroundWindow (dlg);
446			break;
447
448			case WM_COMMAND:
449			switch (LOWORD (wparam)) {
450			case IDOK:
451			i = GetDlgItemText (dlg, IDC_CDNEW_IMGFILE, imgfile, sizeof imgfile-1);
452			if (!i) {
453			msg_box (dlg, _("Please enter a name for the image file."),
454			_("Cryptdisk"), MB_ERR);
455			return FALSE;
456			}
457			if (file_exist_check (imgfile) == 0) {
458			i = msg_box (dlg, _("This volume file already exists.\n"
459			"Do you want to overwrite it?"),
460			_("Cryptdisk Warning"), MB_YESNO\|MB_WARN);
461			if (i == IDNO)
462			return FALSE;
463			}
464			for (i=0; i < (int)strlen (imgfile); i++)
465			imgfile[i] = toupper (imgfile[i]);
466			size = GetDlgItemInt (dlg, IDC_CDNEW_SIZE, NULL, FALSE);
467			if (!size) {
468			msg_box (dlg, _("Please enter the size for the volume"),
469			_("Cryptdisk"), MB_INFO);
470			return FALSE;
471			}
472			size = 1024; /KB*/
473			if (check_freespace (imgfile, (size*1024))) {
474			msg_box (dlg, _("There is not enough free disk space to "
475			"store the volume."), _("Cryptdisk"), MB_ERR);
476			return FALSE;
477			}
478			i = GetDlgItemText (dlg, IDC_CDNEW_PASS, key, sizeof key-1);
479			if (!i) {
480			msg_box (dlg, _("Please enter a passphrase for the volume."),
481			_("Cryptdisk"), MB_ERR);
482			return FALSE;
483			}
484			strcpy (drv, "?:\\");
485			drv[0] = init_drives (NULL, -1);
486			i = cryptdisk_mount (last_devnum (mounted), imgfile, size, drv);
487			if (!i)
488			shfmt (dlg, drv[0] - 65, 0, 0);
489			break;
490			case IDCANCEL:
491			EndDialog (dlg, FALSE);
492			break;
493			}
494			break;
495
496			}
497
498			return FALSE;
499			}
500
501
502			BOOL CALLBACK
503			cryptdisk_mount_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
504			{
505			const char * s_imgfile;
506			char buf[8], drive[8], passwd[64], imgfile[128];
507			int n, i, devnum=0;
508			int rc;
509
510			switch (msg) {
511			case WM_INITDIALOG:
512			do_check (dlg);
513			s_imgfile = (const char *)lparam;
514			if (s_imgfile)
515			SetDlgItemText (dlg, IDC_CDMOUNT_IMGFILE, s_imgfile);
516			init_drives (dlg, IDC_CDMOUNT_DRV);
517			n = num_of_devices ();
518			if (n == -1) {
519			msg_box (dlg, _("Cannot determine the number of drives."),
520			_("Cryptdisk Error"), MB_ERR);
521			EndDialog (dlg, FALSE);
522			}
523			for (i=last_devnum (mounted); i < n; i++) {
524			sprintf (buf, "%d", i);
525			SendDlgItemMessage (dlg, IDC_CDMOUNT_ID, CB_ADDSTRING, 0,
526			(LPARAM)(const char *)buf);
527			}
528			SendDlgItemMessage (dlg, IDC_CDMOUNT_ID, CB_SETCURSEL, 0, 0);
529			center_window (dlg, NULL);
530			SetForegroundWindow (dlg);
531			break;
532
533			case WM_COMMAND:
534			switch (LOWORD (wparam)) {
535			case IDC_CDMOUNT_SELFILE:
536			s_imgfile = get_fileopen_dlg (dlg, _("Select Crypdisk Volume"),
537			NULL, NULL);
538			if (s_imgfile != NULL)
539			SetDlgItemText (dlg, IDC_CDMOUNT_IMGFILE, s_imgfile);
540			break;
541
542			case IDOK:
543			n = item_get_text_length (dlg, IDC_CDMOUNT_IMGFILE);
544			if (!n) {
545			msg_box (dlg, _("Please enter the name of the image file."),
546			_("Cryptdisk Error"), MB_ERR);
547			return FALSE;
548			}
549			n = item_get_text_length (dlg, IDC_CDMOUNT_PASS);
550			if (!n) {
551			msg_box (dlg, _("Please enter a password."),
552			_("Cryptdisk Error"), MB_ERR);
553			return FALSE;
554			}
555			devnum = GetDlgItemInt (dlg, IDC_CDMOUNT_ID, NULL, FALSE);
556			GetDlgItemText (dlg, IDC_CDMOUNT_DRV, drive, sizeof drive-1);
557			GetDlgItemText (dlg, IDC_CDMOUNT_PASS, passwd, sizeof passwd-1);
558			GetDlgItemText (dlg, IDC_CDMOUNT_IMGFILE, imgfile, sizeof imgfile-1);
559			if (file_exist_check (imgfile)) {
560			msg_box (dlg, _("Image file does not exist or could not be accessed."),
561			_("Cryptdisk Error"), MB_ERR);
562			return FALSE;
563			}
564			rc = cryptdisk_mount (devnum, imgfile, 0, drive);
565			if (!rc) {
566	twoaday	77	mount_list_t t = new_mount_list (drive, devnum);
567	werner	36	if (!mounted)
568	twoaday	77	mounted = t;
569	werner	36	else
570	twoaday	77	add_mount_list (mounted, t);
571	werner	36	EndDialog (dlg, TRUE);
572			}
573			else
574			msg_box (dlg, winpt_strerror (rc), _("Cryptdisk Error"), MB_ERR);
575			break;
576
577			case IDCANCEL:
578			EndDialog (dlg, FALSE);
579			break;
580			}
581			break;
582			}
583			return FALSE;
584			}
585
586
587			static void
588			load_devs_from_mountlist (HWND dlg, int ctlid)
589			{
590			mount_list_t n;
591			char buf[128];
592
593			if (!mounted)
594			return;
595
596			for (n=mounted; n; n=n->next) {
597			if (n->ttl == 0)
598			continue;
599			_snprintf (buf, sizeof buf-1, _("Drive %s (ID %d); Size %d MB, Readonly=%s"),
600			n->drive, n->devnum, n->size.LowPart/1024/1024,
601			n->rdonly? "true" : "false");
602			SendDlgItemMessage (dlg, ctlid, LB_ADDSTRING, 0, (LPARAM)(const char *)buf);
603			}
604
605			}
606
607
608			static void
609			do_reaping (void)
610			{
611			mount_list_t n;
612			int ndevs=0, numount=0;
613
614			for (n=mounted; n; n=n->next) {
615			if (n->ttl == 0)
616			numount++;
617			ndevs++;
618			}
619			if (ndevs == numount) {
620			free_mount_list (mounted);
621			mounted = NULL;
622			}
623			}
624
625
626			BOOL CALLBACK
627			cryptdisk_umount_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
628			{
629			mount_list_t vol;
630			char buf[128];
631			int n, rc=0;
632
633			switch (msg) {
634			case WM_INITDIALOG:
635			do_check (dlg);
636			load_devs_from_mountlist (dlg, IDC_CDUMOUNT_LIST);
637			center_window (dlg, NULL);
638			SetForegroundWindow (dlg);
639			break;
640
641			case WM_DESTROY:
642			do_reaping ();
643			break;
644
645			case WM_COMMAND:
646			switch (LOWORD (wparam)) {
647			case IDOK:
648			n = SendDlgItemMessage (dlg, IDC_CDUMOUNT_LIST, LB_GETCURSEL, 0, 0);
649			if (n == LB_ERR) {
650			msg_box (dlg, _("Please select one drive to umount."), _("Cryptdisk"), MB_INFO);
651			return FALSE;
652			}
653			SendDlgItemMessage (dlg, IDC_CDUMOUNT_LIST, LB_GETTEXT, n,
654			(LPARAM)(char *)buf);
655			strcpy (buf, buf+6);
656			buf[2] = '\0';
657			vol = find_mount_list (mounted, buf);
658			if (!vol)
659			BUG (0);
660			rc = cryptdisk_unmount (buf[0], 0);
661			//if (rc == WPTERR_CDISK_LOCK)
662			// rc = cryptdisk_unmount (buf[0], 0);
663			if (!rc) {
664			SendDlgItemMessage (dlg, IDC_CDUMOUNT_LIST, LB_DELETESTRING, (WPARAM)n, 0);
665			remove_mount_list (mounted, vol);
666			}
667			else
668			msg_box (dlg, winpt_strerror (rc), _("Cryptdisk Error"), MB_ERR);
669			break;
670			case IDCANCEL:
671			EndDialog (dlg, FALSE);
672			break;
673			}
674			break;
675			}
676
677			return FALSE;
678			}
679
680
681			int
682			cryptdisk_serv_run (void)
683			{
684			SC_HANDLE hd;
685			ENUM_SERVICE_STATUS ess[4096];
686			DWORD nservs=0, dummy=0;
687			DWORD i;
688			int rc=0;
689
690			hd = OpenSCManager (NULL, NULL, SC_MANAGER_ENUMERATE_SERVICE);
691			if (!hd)
692			return 0;
693
694			EnumServicesStatus (hd, SERVICE_DRIVER, SERVICE_ACTIVE,
695			(LPENUM_SERVICE_STATUS)&ess,
696			sizeof ess-1, &dummy, &nservs, &dummy);
697
698			for (i=0; i < nservs; i++) {
699			if (!strnicmp ("FileDisk", ess[i].lpDisplayName, 8)) {
700			rc = 1;
701			break;
702			}
703			}
704
705			CloseServiceHandle (hd);
706			return rc;
707			}
708	twoaday	77