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
 */

#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 n = new_mount_list (drive, devnum);
                if (!mounted)
                    mounted = n;
                else
                    add_mount_list (mounted, n);
                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	twoaday	2	/* 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
21			#include <windows.h>
22			#include <winioctl.h>
23			#include <stdio.h>
24			#include <ctype.h>
25
26			#include "../resource.h"
27			#include "wptCryptdisk.h"
28			#include "wptTypes.h"
29			#include "wptW32API.h"
30			#include "wptNLS.h"
31			#include "wptErrors.h"
32
33			/DWORD SHFormatDrive(HWND hwnd, UINT drive, UINT fmtID, UINT options);/
34			typedef DWORD (WINAPI *sh_format_drive_p) (HWND, UINT, UINT, UINT);
35
36			static mount_list_t mounted=NULL;
37			static HMODULE shell32=NULL;
38			static sh_format_drive_p shfmt=NULL;
39
40
41			static int
42			is_nt4 (void)
43			{
44			static int nt_flag = -1;
45			OSVERSIONINFO osinf;
46
47			if (nt_flag != -1)
48			return nt_flag;
49
50			memset (&osinf, 0, sizeof osinf);
51			osinf.dwOSVersionInfoSize = sizeof osinf;
52			GetVersionEx (&osinf);
53			if (osinf.dwPlatformId == VER_PLATFORM_WIN32_NT) {
54			nt_flag = 1;
55			shell32 = LoadLibrary ("SHELL32.DLL");
56			shfmt = (sh_format_drive_p)GetProcAddress (shell32, "SHFormatDrive");
57			if (!shfmt)
58			BUG (0);
59			}
60			else
61			nt_flag = 0;
62			return nt_flag;
63			}
64
65			static int
66			check_filedisk (void)
67			{
68			HKEY hk;
69			int rc = -1;
70
71			rc = RegOpenKeyEx (HKEY_LOCAL_MACHINE,
72			"SYSTEM\\CurrentControlSet\\Services\\FileDisk",
73			0, KEY_READ, &hk);
74			if (rc == ERROR_SUCCESS) {
75			RegCloseKey (hk);
76			rc = 0;
77			}
78			return rc;
79			}
80
81
82			int
83			cryptdisk_available (void)
84			{
85			return (is_nt4 () == 1 && check_filedisk () == 0)? 1 : 0;
86			}
87
88
89			void
90			cryptdisk_cleanup (void)
91			{
92			if (shell32)
93			FreeLibrary (shell32);
94			shell32 = NULL;
95			}
96
97
98			static int
99			num_of_devices (void)
100			{
101			HKEY hk;
102			BYTE buf[32];
103			DWORD n=0, type=0;
104			int rc;
105
106			rc = RegOpenKeyEx (HKEY_LOCAL_MACHINE,
107			"SYSTEM\\CurrentControlSet\\Services\\FileDisk\\Parameters",
108			0, KEY_READ, &hk);
109			if (rc != ERROR_SUCCESS)
110			return -1;
111
112			n = sizeof buf-1;
113			memset (buf, 0, sizeof buf);
114			rc = RegQueryValueEx (hk, "NumberOfDevices", 0, &type, buf, &n);
115			if (rc != ERROR_SUCCESS \|\| type != REG_DWORD)
116			n=0;
117			else
118			n = *buf;
119			RegCloseKey (hk);
120			return n;
121			}
122
123
124			static HWND
125			start_cryptdisk_server (HANDLE * r_proc)
126			{
127			STARTUPINFO si;
128			PROCESS_INFORMATION pi;
129
130			memset (&si, 0, sizeof si);
131			memset (&pi, 0, sizeof pi);
132			si.cb = sizeof si;
133
134			if (CreateProcess (NULL, "CryptdiskSrv", NULL, NULL, FALSE, 0,
135			NULL, NULL, &si, &pi) == FALSE) {
136			msg_box (NULL, _("Could not execute Cryptdisk Server."),
137			_("Cryptdisk Error"), MB_ERR);
138			return NULL;
139			}
140			*r_proc = pi.hProcess;
141			Sleep (300);
142			return FindWindow ("CryptdiskSrv", NULL);
143			}
144
145
146			static int
147			cryptdisk_mount (int devnum,
148			const char * imgfile,
149			u32 size,
150			const char * hdlet)
151			{
152			HWND h;
153			HANDLE proc, wait_ev;
154			COPYDATASTRUCT cds;
155			struct private_ofi_s ofi;
156
157			h = start_cryptdisk_server (&proc);
158			if (!h)
159			return WPTERR_GENERAL;
160			memset (&ofi, 0, sizeof ofi);
161			ofi.cmd = CMD_MOUNT;
162			ofi.devnum = devnum;
163			ofi.filesize.LowPart = size;
164			ofi.drvlet = *hdlet;
165			ofi.readonly = 0;
166			strcpy ((char *)ofi.fname, imgfile);
167			ofi.flen = strlen (imgfile);
168
169			wait_ev = OpenEvent (SYNCHRONIZE, FALSE, "cryptdisksrv.wait");
170			if (!wait_ev)
171			BUG (0);
172			memset (&cds, 0, sizeof cds);
173			cds.cbData = sizeof ofi;
174			cds.lpData = &ofi;
175			SendMessage (h, WM_COPYDATA, (WPARAM)GetDesktopWindow (), (LPARAM)&cds);
176			WaitForSingleObject (wait_ev, INFINITE);
177			CloseHandle (wait_ev);
178			CloseHandle (proc);
179			return 0;
180			}
181
182
183
184			int
185			cryptdisk_unmount (char drivelet, int forced)
186			{
187			HWND h;
188			HANDLE proc;
189			COPYDATASTRUCT cds;
190			struct private_ofi_s ofi;
191
192			h = start_cryptdisk_server (&proc);
193			if (!h)
194			return WPTERR_GENERAL;
195
196			memset (&ofi, 0, sizeof ofi);
197			ofi.cmd = CMD_UMOUNT;
198			ofi.drvlet = drivelet;
199			ofi.forced = forced;
200
201			memset (&cds, 0, sizeof cds);
202			cds.lpData = &ofi;
203			cds.cbData = sizeof ofi;
204			SendMessage (h, WM_COPYDATA, (WPARAM)GetDesktopWindow (), (LPARAM)&cds);
205			CloseHandle (proc);
206
207			return 0;
208			}
209
210			static void
211			print_lasterr (char * prefix)
212			{
213			LPVOID msg;
214
215			FormatMessage(
216			FORMAT_MESSAGE_ALLOCATE_BUFFER \|
217			FORMAT_MESSAGE_FROM_SYSTEM \|
218			FORMAT_MESSAGE_IGNORE_INSERTS,
219			NULL,
220			GetLastError(),
221			0,
222			(LPTSTR) &msg,
223			0,
224			NULL
225			);
226			MessageBox (NULL, (LPTSTR)msg, prefix, MB_ICONERROR\|MB_OK);
227			LocalFree (msg);
228			}
229
230
231			static int
232			filedisk_status (char drivelet, LARGE_INTEGER * size, int * rdonly)
233			{
234			char VolumeName[] = "\\\\.\\ :";
235			HANDLE Device;
236			POPEN_FILE_INFORMATION ofi;
237			DWORD BytesReturned;
238			int n= sizeof (OPEN_FILE_INFORMATION)+ MAX_PATH;
239
240			VolumeName[4] = drivelet;
241
242			Device = CreateFile (VolumeName,
243			GENERIC_READ,
244			FILE_SHARE_READ \| FILE_SHARE_WRITE,
245			NULL,
246			OPEN_EXISTING,
247			FILE_FLAG_NO_BUFFERING,
248			NULL);
249
250			if (Device == INVALID_HANDLE_VALUE) {
251			print_lasterr(&VolumeName[4]);
252			return WPTERR_CDISK_OPEN;
253			}
254
255			ofi = (POPEN_FILE_INFORMATION)malloc (n);
256
257			if (!DeviceIoControl (Device,
258			IOCTL_FILE_DISK_QUERY_FILE,
259			NULL,
260			0,
261			ofi,
262			sizeof(OPEN_FILE_INFORMATION) + MAX_PATH,
263			&BytesReturned, NULL)) {
264			print_lasterr (&VolumeName[4]);
265			return WPTERR_CDISK_QUERY;
266			}
267
268			if (BytesReturned < sizeof(OPEN_FILE_INFORMATION)) {
269			SetLastError (ERROR_INSUFFICIENT_BUFFER);
270			print_lasterr (&VolumeName[4]);
271			return WPTERR_CDISK_QUERY;
272			}
273
274			if (size)
275			*size = ofi->FileSize;
276			if (rdonly)
277			*rdonly = ofi->ReadOnly;
278
279			return 0;
280			}
281
282
283			static mount_list_t
284			new_mount_list (const char * drive, int devnum)
285			{
286			mount_list_t n;
287
288			n = (mount_list_t)calloc (1, sizeof *n);
289			if (n) {
290			strcpy (n->drive, drive);
291			n->devnum = devnum;
292			n->ttl = 1;
293			filedisk_status (*drive, &n->size, &n->rdonly);
294			}
295			return n;
296			}
297
298
299			static mount_list_t
300			find_mount_list (mount_list_t root, const char * drive)
301			{
302			mount_list_t n;
303
304			for (n=root; n; n=n->next) {
305			if (n->ttl == 0)
306			continue;
307			if (!strncmp (n->drive, drive, strlen (drive)))
308			return n;
309			}
310			return NULL;
311			}
312
313
314			static void
315			add_mount_list (mount_list_t root, mount_list_t node)
316			{
317			mount_list_t n;
318
319			if (find_mount_list (root, node->drive))
320			return;
321
322			for (n=root; n->next; n=n->next)
323			;
324			n->next = node;
325			}
326
327
328			static void
329			remove_mount_list (mount_list_t root, mount_list_t node)
330			{
331			mount_list_t n;
332
333			n = find_mount_list (root, node->drive);
334			if (n)
335			n->ttl = 0;
336			}
337
338
339			static void
340			free_mount_list (mount_list_t root)
341			{
342			mount_list_t n;
343
344			while (root) {
345			n = root->next;
346			free (root);
347			root = n;
348			}
349			}
350
351
352			static int
353			last_devnum (mount_list_t root)
354			{
355			mount_list_t n;
356			int devnum=0;
357
358			if (!root)
359			return 0;
360
361			for (n=root; n; n=n->next) {
362			if (devnum < n->devnum)
363			devnum=n->devnum;
364			}
365			return devnum+1;
366			}
367
368
369			static char
370			init_drives (HWND dlg, int ctlid)
371			{
372			char buf[512], drv[5];
373			DWORD n=0, i=0;
374
375			n=GetLogicalDriveStrings (sizeof buf-1, buf);
376			for (i=0; i < n; i++) {
377			memcpy (drv, buf+i, 3); drv[3]=0;
378			i += 3;
379			}
380			if (!dlg && ctlid == -1)
381			return ++drv[0];
382
383			for (++drv[0]; drv[0] < 'Z'; drv[0]++)
384			SendDlgItemMessage (dlg, ctlid, CB_ADDSTRING, 0,
385			(LPARAM)(const char *)drv);
386			SendDlgItemMessage (dlg, ctlid, CB_SETCURSEL, 0, 0);
387			return 0;
388			}
389
390
391			static int
392			check_freespace (const char * imgfile, u32 size)
393			{
394			ULARGE_INTEGER tocaller, total, totfree;
395			char buf[128] = {0};
396
397			if (!strchr (imgfile, ':'))
398			GetCurrentDirectory (sizeof buf-1, buf);
399			else
400			strncpy (buf, imgfile, sizeof buf-1);
401			buf[3] = '\0';
402			GetDiskFreeSpaceEx (buf, &tocaller, &total, &totfree);
403			if (size > tocaller.LowPart)
404			return -1;
405			return 0;
406			}
407
408
409			static void
410			do_check (HWND dlg)
411			{
412			if (!cryptdisk_serv_run ()) { /* xxx */
413			msg_box (dlg, _("The Cryptdisk service seems to be available but "
414			"it is not started yet.\nPlease start the service "
415			"and try again."), _("Cryptdisk Error"), MB_ERR);
416			EndDialog (dlg, TRUE);
417			}
418			}
419
420
421			BOOL CALLBACK
422			cryptdisk_new_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
423			{
424			const char * ciphers [] = {
425			"twofish",
426			NULL
427			};
428			const char * s;
429			char imgfile[128], key[128], drv[3];
430			int i;
431			u32 size=0;
432
433			switch (msg) {
434			case WM_INITDIALOG:
435			do_check (dlg);
436			SetDlgItemInt (dlg, IDC_CDNEW_SIZE, DISK_DEFSIZE, FALSE);
437			for (i=0; (s=ciphers[i]); i++)
438			SendDlgItemMessage (dlg, IDC_CDNEW_CIPHERS, CB_ADDSTRING,
439			0, (LPARAM)(const char *) s);
440			SendDlgItemMessage (dlg, IDC_CDNEW_CIPHERS, CB_SETCURSEL, 0, 0);
441	twoaday	23	center_window (dlg, NULL);
442	twoaday	2	SetForegroundWindow (dlg);
443			break;
444
445			case WM_COMMAND:
446			switch (LOWORD (wparam)) {
447			case IDOK:
448			i = GetDlgItemText (dlg, IDC_CDNEW_IMGFILE, imgfile, sizeof imgfile-1);
449			if (!i) {
450			msg_box (dlg, _("Please enter a name for the image file."),
451			_("Cryptdisk"), MB_ERR);
452			return FALSE;
453			}
454			if (file_exist_check (imgfile) == 0) {
455			i = msg_box (dlg, _("This volume file already exists.\n"
456			"Do you want to overwrite it?"),
457			_("Cryptdisk Warning"), MB_YESNO\|MB_WARN);
458			if (i == IDNO)
459			return FALSE;
460			}
461			for (i=0; i < (int)strlen (imgfile); i++)
462			imgfile[i] = toupper (imgfile[i]);
463			size = GetDlgItemInt (dlg, IDC_CDNEW_SIZE, NULL, FALSE);
464			if (!size) {
465			msg_box (dlg, _("Please enter the size for the volume"),
466			_("Cryptdisk"), MB_INFO);
467			return FALSE;
468			}
469			size = 1024; /KB*/
470			if (check_freespace (imgfile, (size*1024))) {
471			msg_box (dlg, _("There is not enough free disk space to "
472			"store the volume."), _("Cryptdisk"), MB_ERR);
473			return FALSE;
474			}
475			i = GetDlgItemText (dlg, IDC_CDNEW_PASS, key, sizeof key-1);
476			if (!i) {
477			msg_box (dlg, _("Please enter a passphrase for the volume."),
478			_("Cryptdisk"), MB_ERR);
479			return FALSE;
480			}
481			strcpy (drv, "?:\\");
482			drv[0] = init_drives (NULL, -1);
483			i = cryptdisk_mount (last_devnum (mounted), imgfile, size, drv);
484			if (!i)
485			shfmt (dlg, drv[0] - 65, 0, 0);
486			break;
487			case IDCANCEL:
488			EndDialog (dlg, FALSE);
489			break;
490			}
491			break;
492
493			}
494
495			return FALSE;
496			}
497
498
499			BOOL CALLBACK
500			cryptdisk_mount_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
501			{
502			const char * s_imgfile;
503			char buf[8], drive[8], passwd[64], imgfile[128];
504			int n, i, devnum=0;
505			int rc;
506
507			switch (msg) {
508			case WM_INITDIALOG:
509			do_check (dlg);
510			s_imgfile = (const char *)lparam;
511			if (s_imgfile)
512			SetDlgItemText (dlg, IDC_CDMOUNT_IMGFILE, s_imgfile);
513			init_drives (dlg, IDC_CDMOUNT_DRV);
514			n = num_of_devices ();
515			if (n == -1) {
516			msg_box (dlg, _("Cannot determine the number of drives."),
517			_("Cryptdisk Error"), MB_ERR);
518			EndDialog (dlg, FALSE);
519			}
520			for (i=last_devnum (mounted); i < n; i++) {
521			sprintf (buf, "%d", i);
522			SendDlgItemMessage (dlg, IDC_CDMOUNT_ID, CB_ADDSTRING, 0,
523			(LPARAM)(const char *)buf);
524			}
525			SendDlgItemMessage (dlg, IDC_CDMOUNT_ID, CB_SETCURSEL, 0, 0);
526	twoaday	23	center_window (dlg, NULL);
527	twoaday	2	SetForegroundWindow (dlg);
528			break;
529
530			case WM_COMMAND:
531			switch (LOWORD (wparam)) {
532			case IDC_CDMOUNT_SELFILE:
533	twoaday	25	s_imgfile = get_fileopen_dlg (dlg, _("Select Crypdisk Volume"),
534	twoaday	2	NULL, NULL);
535	twoaday	23	if (s_imgfile != NULL)
536	twoaday	2	SetDlgItemText (dlg, IDC_CDMOUNT_IMGFILE, s_imgfile);
537			break;
538
539			case IDOK:
540			n = item_get_text_length (dlg, IDC_CDMOUNT_IMGFILE);
541			if (!n) {
542			msg_box (dlg, _("Please enter the name of the image file."),
543			_("Cryptdisk Error"), MB_ERR);
544			return FALSE;
545			}
546			n = item_get_text_length (dlg, IDC_CDMOUNT_PASS);
547			if (!n) {
548			msg_box (dlg, _("Please enter a password."),
549			_("Cryptdisk Error"), MB_ERR);
550			return FALSE;
551			}
552			devnum = GetDlgItemInt (dlg, IDC_CDMOUNT_ID, NULL, FALSE);
553			GetDlgItemText (dlg, IDC_CDMOUNT_DRV, drive, sizeof drive-1);
554			GetDlgItemText (dlg, IDC_CDMOUNT_PASS, passwd, sizeof passwd-1);
555			GetDlgItemText (dlg, IDC_CDMOUNT_IMGFILE, imgfile, sizeof imgfile-1);
556			if (file_exist_check (imgfile)) {
557			msg_box (dlg, _("Image file does not exist or could not be accessed."),
558			_("Cryptdisk Error"), MB_ERR);
559			return FALSE;
560			}
561			rc = cryptdisk_mount (devnum, imgfile, 0, drive);
562			if (!rc) {
563			mount_list_t n = new_mount_list (drive, devnum);
564			if (!mounted)
565			mounted = n;
566			else
567			add_mount_list (mounted, n);
568			EndDialog (dlg, TRUE);
569			}
570			else
571			msg_box (dlg, winpt_strerror (rc), _("Cryptdisk Error"), MB_ERR);
572			break;
573
574			case IDCANCEL:
575			EndDialog (dlg, FALSE);
576			break;
577			}
578			break;
579			}
580			return FALSE;
581			}
582
583
584			static void
585			load_devs_from_mountlist (HWND dlg, int ctlid)
586			{
587			mount_list_t n;
588			char buf[128];
589
590			if (!mounted)
591			return;
592
593			for (n=mounted; n; n=n->next) {
594			if (n->ttl == 0)
595			continue;
596			_snprintf (buf, sizeof buf-1, _("Drive %s (ID %d); Size %d MB, Readonly=%s"),
597			n->drive, n->devnum, n->size.LowPart/1024/1024,
598			n->rdonly? "true" : "false");
599			SendDlgItemMessage (dlg, ctlid, LB_ADDSTRING, 0, (LPARAM)(const char *)buf);
600			}
601
602			}
603
604
605			static void
606			do_reaping (void)
607			{
608			mount_list_t n;
609			int ndevs=0, numount=0;
610
611			for (n=mounted; n; n=n->next) {
612			if (n->ttl == 0)
613			numount++;
614			ndevs++;
615			}
616			if (ndevs == numount) {
617			free_mount_list (mounted);
618			mounted = NULL;
619			}
620			}
621
622
623			BOOL CALLBACK
624			cryptdisk_umount_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
625			{
626			mount_list_t vol;
627			char buf[128];
628			int n, rc=0;
629
630			switch (msg) {
631			case WM_INITDIALOG:
632			do_check (dlg);
633			load_devs_from_mountlist (dlg, IDC_CDUMOUNT_LIST);
634	twoaday	23	center_window (dlg, NULL);
635	twoaday	2	SetForegroundWindow (dlg);
636			break;
637
638			case WM_DESTROY:
639			do_reaping ();
640			break;
641
642			case WM_COMMAND:
643			switch (LOWORD (wparam)) {
644			case IDOK:
645			n = SendDlgItemMessage (dlg, IDC_CDUMOUNT_LIST, LB_GETCURSEL, 0, 0);
646			if (n == LB_ERR) {
647			msg_box (dlg, _("Please select one drive to umount."), _("Cryptdisk"), MB_INFO);
648			return FALSE;
649			}
650			SendDlgItemMessage (dlg, IDC_CDUMOUNT_LIST, LB_GETTEXT, n,
651			(LPARAM)(char *)buf);
652			strcpy (buf, buf+6);
653			buf[2] = '\0';
654			vol = find_mount_list (mounted, buf);
655			if (!vol)
656			BUG (0);
657			rc = cryptdisk_unmount (buf[0], 0);
658			//if (rc == WPTERR_CDISK_LOCK)
659			// rc = cryptdisk_unmount (buf[0], 0);
660			if (!rc) {
661			SendDlgItemMessage (dlg, IDC_CDUMOUNT_LIST, LB_DELETESTRING, (WPARAM)n, 0);
662			remove_mount_list (mounted, vol);
663			}
664			else
665			msg_box (dlg, winpt_strerror (rc), _("Cryptdisk Error"), MB_ERR);
666			break;
667			case IDCANCEL:
668			EndDialog (dlg, FALSE);
669			break;
670			}
671			break;
672			}
673
674			return FALSE;
675			}
676
677
678			int
679			cryptdisk_serv_run (void)
680			{
681			SC_HANDLE hd;
682			ENUM_SERVICE_STATUS ess[4096];
683			DWORD nservs=0, dummy=0;
684			DWORD i;
685			int rc=0;
686
687			hd = OpenSCManager (NULL, NULL, SC_MANAGER_ENUMERATE_SERVICE);
688			if (!hd)
689			return 0;
690
691			EnumServicesStatus (hd, SERVICE_DRIVER, SERVICE_ACTIVE,
692			(LPENUM_SERVICE_STATUS)&ess,
693			sizeof ess-1, &dummy, &nservs, &dummy);
694
695			for (i=0; i < nservs; i++) {
696			if (!strnicmp ("FileDisk", ess[i].lpDisplayName, 8)) {
697			rc = 1;
698			break;
699			}
700			}
701
702			CloseServiceHandle (hd);
703			return rc;
704			}