trunk/src/OEPassphraseCBDlg.c

/* OEPassphraseDLG.cpp - GPGME Passphrase Callback 
 *      Copyright (C) 2001, 2002, 2006 Timo Schulz
 *
 * This file is part of GPGOE.
 *
 * GPGOE is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 * 
 * GPGOE 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 Lesser General Public License
 * along with GPGOE; if not, write to the Free Software Foundation, 
 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA7 USA 
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <windows.h>
#include <assert.h>
#include "resource.h"
#include "gpgme.h"
#include "GPGOE.h"

/* Structure for the passphrase callback. */
struct pass_cb_s {
    const char *uid_hint;
    const char *passphrase_info;
    char *pass;
    HWND main_hwnd;
    int cancel;
    int prev_was_bad;
};


/* Extract public key algorithm from passwd info. */
const char*
get_pubkey_algo (const char *passphrase_info)
{    
    size_t pos = 16+1+16+1;

    /* AA6F7AB7DD3B4A21 E71D9BC8C93A8529 1 0 */
    assert (strlen (passphrase_info) > pos);
    switch (atol (passphrase_info+pos)) {
    case 1: return "RSA";
    case 17: return "DSA";
    case 16: return "ELG";
    }
    return "???";
}


/* Passphrase callback dialog box procedure. */
BOOL CALLBACK
pass_cb_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
{
    static pass_cb_t ctx;
    char *info, keyid[8+2] = {0};
    int n;
    
    switch (msg) {
    case WM_INITDIALOG:
        ctx = (pass_cb_t)lparam;
        assert (ctx);
        if (ctx->uid_hint && ctx->passphrase_info) {
            char *utf8_uid = utf8_to_native (ctx->uid_hint+17);
            memcpy (keyid, ctx->passphrase_info+8, 8);
            info = xcalloc (1, strlen (utf8_uid) +  strlen (keyid) + 32);
            sprintf (info, _("%s\n%s key, ID %s"), utf8_uid, 
                            get_pubkey_algo (ctx->passphrase_info), keyid);
            SetDlgItemText (dlg, IDC_DECRYPT_MSG, info);
            free_if_alloc (utf8_uid);
            free_if_alloc (info);
        }
        SendDlgItemMessage (dlg, IDC_DECRYPT_PWD, EM_SETPASSWORDCHAR, 
                            (WPARAM)(UINT)'*', 0);
        SetForegroundWindow (dlg);
        break;

    case WM_COMMAND:
        switch (LOWORD (wparam)) {
        case IDCANCEL:
            ctx->cancel = 1;
            free_if_alloc (ctx->pass);
            EndDialog (dlg, FALSE);
            break;

        case IDOK:
            if (ctx->prev_was_bad)
                SetDlgItemText (dlg, IDC_DECRYPT_PWDINFO,
                                _("Invalid passphrase; please enter your passphrase again"));
            else
                SetDlgItemText (dlg, IDC_DECRYPT_PWDINFO,
                                _("Please enter your passphrase"));
            n = SendDlgItemMessage (dlg, IDC_DECRYPT_PWD, 
                                    WM_GETTEXTLENGTH, 0, 0);
            if (n < 1) {
                MessageBox (dlg, _("Please enter your passphrase"),
                            _("GPG Plug-in Info"), MB_ICONINFORMATION|MB_OK);
                return FALSE;
            }
            ctx->cancel = 0;
            ctx->pass = xcalloc (1, n+2);
            GetDlgItemText (dlg, IDC_DECRYPT_PWD, ctx->pass, n+1);
            EndDialog (dlg, TRUE);
            break;
        }
        break;
    }
    return FALSE;
}


/* GPGME compatible passphrase callback. */
gpgme_error_t
passphrase_cb (void *hook,
               const char *uid_hint,
               const char *passphrase_info,
               int prev_was_bad, int fd)
{
    pass_cb_t cb = (pass_cb_t)hook;
    HANDLE fp = (HANDLE)fd;
    DWORD nwritten = 0;
    
    cb->prev_was_bad = prev_was_bad;
    if (prev_was_bad && !cb->cancel) {
        wipememory (cb->pass, strlen (cb->pass));
        free_if_alloc (cb->pass);
    }
    if (!cb->pass && !cb->cancel) {
        cb->uid_hint = uid_hint;
        cb->passphrase_info = passphrase_info;
        DialogBoxParam (mod_hinst_dll, (LPCTSTR)IDD_DECRYPT,
                        cb->main_hwnd, pass_cb_dlg_proc, (LPARAM)cb);
    }

    if (cb->cancel)
        WriteFile (fp, "\n", 1, &nwritten, NULL);
    else if (cb->pass != NULL) {
        WriteFile (fp, cb->pass, strlen (cb->pass), &nwritten, NULL);
        WriteFile (fp, "\n", 1, &nwritten, NULL);
    }
    return 0;
}


/* Allocate new passphrase callback context. */
pass_cb_t
new_pass_cb (HWND main)
{
    pass_cb_t cb_val;

    cb_val = xcalloc (1, sizeof *cb_val);
    cb_val->main_hwnd = main;
    return cb_val;
}


/* Free passphrase callback context. */
void
free_pass_cb (pass_cb_t cb)
{
    if (!cb)
        return;
    if (cb->pass) {
        wipememory (cb->pass, strlen (cb->pass));
        free_if_alloc (cb->pass);
    }
    free_if_alloc (cb);
}
1	twoaday	1	/* OEPassphraseDLG.cpp - GPGME Passphrase Callback
2			* Copyright (C) 2001, 2002, 2006 Timo Schulz
3			*
4			* This file is part of GPGOE.
5			*
6			* GPGOE is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU Lesser General Public License as published by
8			* the Free Software Foundation; either version 2.1 of the License, or
9			* (at your option) any later version.
10			*
11			* GPGOE 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 Lesser General Public License
17			* along with GPGOE; if not, write to the Free Software Foundation,
18			* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA7 USA
19			*/
20
21			#ifdef HAVE_CONFIG_H
22			#include <config.h>
23			#endif
24			#include <windows.h>
25			#include <assert.h>
26			#include "resource.h"
27			#include "gpgme.h"
28			#include "GPGOE.h"
29
30			/* Structure for the passphrase callback. */
31			struct pass_cb_s {
32			const char *uid_hint;
33			const char *passphrase_info;
34			char *pass;
35			HWND main_hwnd;
36			int cancel;
37			int prev_was_bad;
38			};
39
40
41			/* Extract public key algorithm from passwd info. */
42			const char*
43			get_pubkey_algo (const char *passphrase_info)
44			{
45			size_t pos = 16+1+16+1;
46
47			/* AA6F7AB7DD3B4A21 E71D9BC8C93A8529 1 0 */
48			assert (strlen (passphrase_info) > pos);
49			switch (atol (passphrase_info+pos)) {
50			case 1: return "RSA";
51			case 17: return "DSA";
52			case 16: return "ELG";
53			}
54			return "???";
55			}
56
57
58			/* Passphrase callback dialog box procedure. */
59			BOOL CALLBACK
60			pass_cb_dlg_proc (HWND dlg, UINT msg, WPARAM wparam, LPARAM lparam)
61			{
62			static pass_cb_t ctx;
63			char *info, keyid[8+2] = {0};
64			int n;
65
66			switch (msg) {
67			case WM_INITDIALOG:
68			ctx = (pass_cb_t)lparam;
69			assert (ctx);
70			if (ctx->uid_hint && ctx->passphrase_info) {
71			char *utf8_uid = utf8_to_native (ctx->uid_hint+17);
72			memcpy (keyid, ctx->passphrase_info+8, 8);
73			info = xcalloc (1, strlen (utf8_uid) + strlen (keyid) + 32);
74			sprintf (info, _("%s\n%s key, ID %s"), utf8_uid,
75			get_pubkey_algo (ctx->passphrase_info), keyid);
76			SetDlgItemText (dlg, IDC_DECRYPT_MSG, info);
77			free_if_alloc (utf8_uid);
78			free_if_alloc (info);
79			}
80			SendDlgItemMessage (dlg, IDC_DECRYPT_PWD, EM_SETPASSWORDCHAR,
81			(WPARAM)(UINT)'*', 0);
82			SetForegroundWindow (dlg);
83			break;
84
85			case WM_COMMAND:
86			switch (LOWORD (wparam)) {
87			case IDCANCEL:
88			ctx->cancel = 1;
89			free_if_alloc (ctx->pass);
90			EndDialog (dlg, FALSE);
91			break;
92
93			case IDOK:
94			if (ctx->prev_was_bad)
95			SetDlgItemText (dlg, IDC_DECRYPT_PWDINFO,
96			_("Invalid passphrase; please enter your passphrase again"));
97			else
98			SetDlgItemText (dlg, IDC_DECRYPT_PWDINFO,
99			_("Please enter your passphrase"));
100			n = SendDlgItemMessage (dlg, IDC_DECRYPT_PWD,
101			WM_GETTEXTLENGTH, 0, 0);
102			if (n < 1) {
103			MessageBox (dlg, _("Please enter your passphrase"),
104			_("GPG Plug-in Info"), MB_ICONINFORMATION\|MB_OK);
105			return FALSE;
106			}
107			ctx->cancel = 0;
108			ctx->pass = xcalloc (1, n+2);
109			GetDlgItemText (dlg, IDC_DECRYPT_PWD, ctx->pass, n+1);
110			EndDialog (dlg, TRUE);
111			break;
112			}
113			break;
114			}
115			return FALSE;
116			}
117
118
119			/* GPGME compatible passphrase callback. */
120			gpgme_error_t
121			passphrase_cb (void *hook,
122			const char *uid_hint,
123			const char *passphrase_info,
124			int prev_was_bad, int fd)
125			{
126			pass_cb_t cb = (pass_cb_t)hook;
127			HANDLE fp = (HANDLE)fd;
128			DWORD nwritten = 0;
129
130			cb->prev_was_bad = prev_was_bad;
131			if (prev_was_bad && !cb->cancel) {
132			wipememory (cb->pass, strlen (cb->pass));
133			free_if_alloc (cb->pass);
134			}
135			if (!cb->pass && !cb->cancel) {
136			cb->uid_hint = uid_hint;
137			cb->passphrase_info = passphrase_info;
138			DialogBoxParam (mod_hinst_dll, (LPCTSTR)IDD_DECRYPT,
139			cb->main_hwnd, pass_cb_dlg_proc, (LPARAM)cb);
140			}
141
142			if (cb->cancel)
143			WriteFile (fp, "\n", 1, &nwritten, NULL);
144			else if (cb->pass != NULL) {
145			WriteFile (fp, cb->pass, strlen (cb->pass), &nwritten, NULL);
146			WriteFile (fp, "\n", 1, &nwritten, NULL);
147			}
148			return 0;
149			}
150
151
152			/* Allocate new passphrase callback context. */
153			pass_cb_t
154			new_pass_cb (HWND main)
155			{
156			pass_cb_t cb_val;
157
158			cb_val = xcalloc (1, sizeof *cb_val);
159			cb_val->main_hwnd = main;
160			return cb_val;
161			}
162
163
164
165			/* Free passphrase callback context. */
166			void
167			free_pass_cb (pass_cb_t cb)
168			{
169			if (!cb)
170			return;
171			if (cb->pass) {
172			wipememory (cb->pass, strlen (cb->pass));
173			free_if_alloc (cb->pass);
174			}
175			free_if_alloc (cb);
176			}