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	/* 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	#include "resource.h"
30	#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	mount_list_t t = new_mount_list (drive, devnum);
567	if (!mounted)
568	mounted = t;
569	else
570	add_mount_list (mounted, t);
571	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