1 |
/* wptPassphraseCB.cpp - GPGME Passphrase Callback |
/* wptPassphraseCB.cpp - GPGME Passphrase Callback |
2 |
* Copyright (C) 2001, 2002, 2003, 2005 Timo Schulz |
* Copyright (C) 2001, 2002-2006 Timo Schulz |
3 |
* Copyright (C) 2005 g10 Code GmbH |
* Copyright (C) 2005 g10 Code GmbH |
4 |
* |
* |
5 |
* This file is part of WinPT. |
* This file is part of WinPT. |
34 |
#include "wptCommonCtl.h" |
#include "wptCommonCtl.h" |
35 |
#include "wptContext.h" |
#include "wptContext.h" |
36 |
#include "wptDlgs.h" |
#include "wptDlgs.h" |
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#include "wptUTF8.h" |
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37 |
#include "wptErrors.h" |
#include "wptErrors.h" |
38 |
#include "wptTypes.h" |
#include "wptTypes.h" |
39 |
#include "wptKeylist.h" |
#include "wptKeylist.h" |
40 |
#include "wptAgent.h" |
#include "wptAgent.h" |
41 |
#include "wptRegistry.h" |
#include "wptRegistry.h" |
42 |
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#include "wptUTF8.h" |
43 |
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const char* get_symkey_algo (int algo); |
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44 |
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45 |
#define item_ctrl_id( cmd ) \ |
/* Return the control ID dependent on the mode (sign or decrypt). */ |
46 |
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#define item_ctrl_id(cmd) \ |
47 |
((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_PWD : IDC_DECRYPT_SIGN_PWD) |
((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_PWD : IDC_DECRYPT_SIGN_PWD) |
48 |
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|
49 |
#define item_ctrl_id2(cmd) \ |
#define item_ctrl_id2(cmd) \ |
50 |
((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_HIDE : IDC_DECRYPT_SIGN_HIDE) |
((cmd) == GPG_CMD_DECRYPT? IDC_DECRYPT_HIDE : IDC_DECRYPT_SIGN_HIDE) |
51 |
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52 |
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const char* get_symkey_algo (int algo); |
53 |
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void ListBox_AddString_utf8 (HWND lb, const char *txt); |
54 |
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55 |
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56 |
/* Overwrite passphrase and free memory. */ |
/* Overwrite passphrase and free memory. */ |
57 |
static void |
static void |
58 |
burn_passphrase (char **pwd) |
burn_passphrase (char **pwd) |
59 |
{ |
{ |
60 |
char *pass = *pwd; |
char *pass = *pwd; |
61 |
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|
62 |
wipememory (pass, strlen (pass)); |
wipememory (pass, strlen (pass)); |
63 |
delete []pass; |
delete []pass; |
64 |
*pwd = NULL; |
*pwd = NULL; |
72 |
static passphrase_cb_s *c; |
static passphrase_cb_s *c; |
73 |
gpgme_decrypt_result_t res=NULL; |
gpgme_decrypt_result_t res=NULL; |
74 |
gpgme_sign_result_t res_sig=NULL; |
gpgme_sign_result_t res_sig=NULL; |
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gpgme_key_t key; |
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75 |
gpgme_recipient_t recip=NULL, r; |
gpgme_recipient_t recip=NULL, r; |
76 |
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winpt_key_s key; |
77 |
void *item; |
void *item; |
78 |
const char *id; |
const char *id; |
79 |
char *info; |
char *info; |
80 |
int n; |
int n; |
81 |
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82 |
switch (msg) { |
switch (msg) { |
83 |
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case WM_ACTIVATE: |
84 |
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safe_edit_control_init (dlg, item_ctrl_id (c->gpg_cmd)); |
85 |
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break; |
86 |
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87 |
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case WM_DESTROY: |
88 |
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safe_edit_control_free (dlg, item_ctrl_id (c->gpg_cmd)); |
89 |
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break; |
90 |
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91 |
case WM_INITDIALOG: |
case WM_INITDIALOG: |
92 |
c = (passphrase_cb_s *)lparam; |
c = (passphrase_cb_s *)lparam; |
93 |
if (!c) |
if (!c) |
94 |
BUG (0); |
BUG (0); |
95 |
SetDlgItemText (dlg, IDCANCEL, _("&Cancel")); |
SetDlgItemText (dlg, IDCANCEL, _("&Cancel")); |
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SetDlgItemText (dlg, IDC_DECRYPT_HIDE, _("&Hide Typing")); |
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96 |
SetWindowText (dlg, c->title); |
SetWindowText (dlg, c->title); |
97 |
if (c->gpg_cmd == GPG_CMD_DECRYPT) { |
if (c->gpg_cmd == GPG_CMD_DECRYPT) { |
98 |
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SetDlgItemText (dlg, IDC_DECRYPT_HIDE, _("&Hide Typing")); |
99 |
SetDlgItemText (dlg, IDC_DECRYPT_LISTINF, |
SetDlgItemText (dlg, IDC_DECRYPT_LISTINF, |
100 |
_("Encrypted with the following public key(s)")); |
_("Encrypted with the following public key(s)")); |
101 |
CheckDlgButton (dlg, IDC_DECRYPT_HIDE, BST_CHECKED); |
CheckDlgButton (dlg, IDC_DECRYPT_HIDE, BST_CHECKED); |
104 |
SetDlgItemText (dlg, IDC_DECRYPT_SIGN_HIDE, _("&Hide Typing")); |
SetDlgItemText (dlg, IDC_DECRYPT_SIGN_HIDE, _("&Hide Typing")); |
105 |
CheckDlgButton (dlg, IDC_DECRYPT_SIGN_HIDE, BST_CHECKED); |
CheckDlgButton (dlg, IDC_DECRYPT_SIGN_HIDE, BST_CHECKED); |
106 |
} |
} |
107 |
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/* Because it depends on the order the keys are stored in the |
108 |
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keyring whether res->recipients is complete or not, we also |
109 |
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support that the recipients were externally extracted and then |
110 |
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we use this list. */ |
111 |
if (c->recipients) |
if (c->recipients) |
112 |
recip = c->recipients; /* recipients were already extracted. */ |
recip = c->recipients; /* recipients were already extracted. */ |
113 |
else { |
else { |
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/* XXX: not all ENCRYPT_TO entries are listed here. */ |
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114 |
res = gpgme_op_decrypt_result (c->gpg); |
res = gpgme_op_decrypt_result (c->gpg); |
115 |
if (res && res->recipients) |
if (res && res->recipients) |
116 |
recip = res->recipients; |
recip = res->recipients; |
117 |
} |
} |
118 |
if (recip != NULL && c->gpg_cmd == GPG_CMD_DECRYPT) { |
if (recip != NULL && c->gpg_cmd == GPG_CMD_DECRYPT) { |
119 |
for (r = res->recipients; r; r = r->next) { |
for (r = recip; r; r = r->next) { |
120 |
get_pubkey (r->keyid, &key); |
memset (&key, 0, sizeof (key)); |
121 |
if (key) { |
if (!winpt_get_pubkey (r->keyid, &key)) { |
122 |
gpgme_user_id_t u = key->uids; |
gpgme_user_id_t u = key.ctx->uids; |
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char *uid; |
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123 |
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124 |
id = u->name; |
id = u->name; |
125 |
if (!id) |
if (!id) |
126 |
id = _("Invalid User ID"); |
id = _("Invalid User ID"); |
127 |
uid = utf8_to_wincp (id, strlen (id)); |
n = 32+strlen (id)+1+4+strlen (r->keyid)+1; |
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n = 32+strlen (uid)+1+4+strlen (r->keyid)+1; |
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128 |
if (u->email) |
if (u->email) |
129 |
n += strlen (u->email)+1; |
n += strlen (u->email)+1; |
130 |
info = new char [n+1]; |
info = new char [n+1]; |
131 |
if (!info) |
if (!info) |
132 |
BUG (NULL); |
BUG (NULL); |
133 |
if (!u->email || strlen (u->email) < 1) |
if (!u->email || strlen (u->email) < 1) |
134 |
sprintf (info, "%s (%s, 0x%s)", uid, |
sprintf (info, "%s (%s, 0x%s)", id, |
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get_key_pubalgo (r->pubkey_algo), r->keyid+8); |
get_key_pubalgo (r->pubkey_algo), r->keyid+8); |
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else |
else |
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sprintf (info, "%s <%s> (%s, 0x%s)", uid, u->email, |
sprintf (info, "%s <%s> (%s, 0x%s)", id, u->email, |
138 |
get_key_pubalgo (r->pubkey_algo), r->keyid+8); |
get_key_pubalgo (r->pubkey_algo), r->keyid+8); |
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free (uid); |
|
139 |
} |
} |
140 |
else { |
else { |
141 |
info = new char [32 + strlen (r->keyid)+1 + 4]; |
info = new char [32 + strlen (r->keyid)+1 + 4]; |
144 |
sprintf (info, _("Unknown key ID (%s, 0x%s)"), |
sprintf (info, _("Unknown key ID (%s, 0x%s)"), |
145 |
get_key_pubalgo (r->pubkey_algo), r->keyid+8); |
get_key_pubalgo (r->pubkey_algo), r->keyid+8); |
146 |
} |
} |
147 |
listbox_add_string (GetDlgItem (dlg, IDC_DECRYPT_LIST), info); |
ListBox_AddString_utf8 (GetDlgItem (dlg, IDC_DECRYPT_LIST), info); |
148 |
free_if_alloc (info); |
free_if_alloc (info); |
149 |
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winpt_release_pubkey (&key); |
150 |
} |
} |
151 |
} |
} |
152 |
else if (c->gpg_cmd == GPG_CMD_DECRYPT) |
else if (c->gpg_cmd == GPG_CMD_DECRYPT) |
172 |
SetDlgItemText (dlg, IDC_DECRYPT_MSG, c->info); |
SetDlgItemText (dlg, IDC_DECRYPT_MSG, c->info); |
173 |
} |
} |
174 |
else { |
else { |
175 |
SetFocus( GetDlgItem (dlg, IDC_DECRYPT_SIGN_PWD)); |
SetFocus (GetDlgItem (dlg, IDC_DECRYPT_SIGN_PWD)); |
176 |
SetDlgItemText (dlg, IDC_DECRYPT_SIGN_MSG, c->info); |
SetDlgItemText (dlg, IDC_DECRYPT_SIGN_MSG, c->info); |
177 |
} |
} |
178 |
center_window (dlg, NULL); |
center_window (dlg, NULL); |
179 |
SetForegroundWindow (dlg); |
SetForegroundWindow (dlg); |
180 |
return FALSE; |
return FALSE; |
181 |
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case WM_SYSCOMMAND: |
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if (LOWORD (wparam) == SC_CLOSE) { |
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SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), ""); |
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c->cancel = 1; |
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EndDialog (dlg, TRUE); |
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} |
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break; |
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182 |
case WM_COMMAND: |
case WM_COMMAND: |
183 |
switch (HIWORD (wparam)) { |
switch (HIWORD (wparam)) { |
184 |
case BN_CLICKED: |
case BN_CLICKED: |
207 |
strcpy (c->pwd, ""); |
strcpy (c->pwd, ""); |
208 |
} |
} |
209 |
else { |
else { |
210 |
c->pwd = new char[n+2]; |
char *p = new char[n+2]; |
211 |
if (!c->pwd) |
if (!p) |
212 |
BUG (NULL); |
BUG (NULL); |
213 |
GetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), c->pwd, n+1); |
/* Get the passphrase and convert it utf8. |
214 |
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This does not just the us-ascii charset. */ |
215 |
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SafeGetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), p, n+1); |
216 |
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c->pwd = native_to_utf8 (p); |
217 |
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sfree_if_alloc (p); |
218 |
} |
} |
219 |
res = gpgme_op_decrypt_result (c->gpg); |
res = gpgme_op_decrypt_result (c->gpg); |
220 |
if (!res) |
if (!res) |
221 |
res_sig = gpgme_op_sign_result (c->gpg); |
res_sig = gpgme_op_sign_result (c->gpg); |
222 |
if (reg_prefs.cache_time > 0 && !c->is_card && |
if (!c->is_card && reg_prefs.cache_time > 0 && |
223 |
(res || res_sig)) { |
(res || res_sig)) { |
224 |
if (agent_get_cache (c->keyid, &item)) |
if (agent_get_cache (c->keyid, &item)) |
225 |
agent_unlock_cache_entry (&item); |
agent_unlock_cache_entry (&item); |
226 |
else |
else |
227 |
agent_put_cache (c->keyid, c->pwd, reg_prefs.cache_time); |
agent_put_cache (c->keyid, c->pwd, reg_prefs.cache_time); |
234 |
SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), ""); |
SetDlgItemText (dlg, item_ctrl_id (c->gpg_cmd), ""); |
235 |
c->cancel = 1; |
c->cancel = 1; |
236 |
EndDialog (dlg, FALSE); |
EndDialog (dlg, FALSE); |
237 |
return FALSE; |
return TRUE; |
238 |
} |
} |
239 |
break; |
break; |
240 |
} |
} |
273 |
gpgme_pubkey_algo_t algo; |
gpgme_pubkey_algo_t algo; |
274 |
char usedkey[16+1]; |
char usedkey[16+1]; |
275 |
char mainkey[16+1]; |
char mainkey[16+1]; |
276 |
char *uid, *p; |
char *p, *uid; |
277 |
int n=0; |
int n=0; |
278 |
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|
279 |
algo = (gpgme_pubkey_algo_t)0; |
algo = (gpgme_pubkey_algo_t)0; |
294 |
uid_hint += 16; /* skip keyid */ |
uid_hint += 16; /* skip keyid */ |
295 |
uid_hint += 1; /* space */ |
uid_hint += 1; /* space */ |
296 |
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297 |
uid = utf8_to_wincp (uid_hint, strlen (uid_hint)); |
uid = utf8_to_native (uid_hint); |
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298 |
if (strcmp (usedkey, mainkey)) |
if (strcmp (usedkey, mainkey)) |
299 |
_snprintf (desc, size-1, |
_snprintf (desc, size-1, |
300 |
_("You need a passphrase to unlock the secret key for\n" |
_("You need a passphrase to unlock the secret key for user:\n" |
301 |
"user: \"%s\"\n" |
"\"%s\"\n" |
302 |
"%s key, ID %s (main key ID %s)\n"), |
"%s key, ID 0x%s (main key ID 0x%s)\n"), |
303 |
uid, get_key_pubalgo (algo), usedkey+8, mainkey+8); |
uid, get_key_pubalgo (algo), usedkey+8, mainkey+8); |
304 |
else if (!strcmp (usedkey, mainkey)) |
else if (!strcmp (usedkey, mainkey)) |
305 |
_snprintf (desc, size-1, |
_snprintf (desc, size-1, |
306 |
_("You need a passphrase to unlock the secret key for\n" |
_("You need a passphrase to unlock the secret key for user:\n" |
307 |
"user: \"%s\"\n" |
"\"%s\"\n" |
308 |
"%s key, ID %s\n"), |
"%s key, ID 0x%s\n"), |
309 |
uid, get_key_pubalgo (algo), usedkey+8); |
uid, get_key_pubalgo (algo), usedkey+8); |
310 |
free (uid); |
safe_free (uid); |
311 |
return 0; |
return 0; |
312 |
} |
} |
313 |
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|
322 |
p = strchr (id, '/'); |
p = strchr (id, '/'); |
323 |
if (!p) { |
if (!p) { |
324 |
log_debug ("extract_serial_no: error '%s'\r\n", id); |
log_debug ("extract_serial_no: error '%s'\r\n", id); |
325 |
return NULL; |
return ""; |
326 |
} |
} |
327 |
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memset (buf, 0, sizeof (buf)); |
328 |
strncpy (buf, id+(p-id)-6, 6); |
strncpy (buf, id+(p-id)-6, 6); |
329 |
return buf; |
return buf; |
330 |
} |
} |
344 |
int rc = 0; |
int rc = 0; |
345 |
|
|
346 |
if (!c) { |
if (!c) { |
347 |
log_debug ("passphrase_cb: error '!c'\r\n"); |
log_debug ("passphrase_cb: error no valid callback\r\n"); |
348 |
return gpg_error (GPG_ERR_INV_ARG); |
return gpg_error (GPG_ERR_INV_ARG); |
349 |
} |
} |
350 |
c->bad_pwd = prev_was_bad? 1 : 0; |
c->bad_pwd = prev_was_bad? 1 : 0; |
398 |
} |
} |
399 |
else if (uid_hint) |
else if (uid_hint) |
400 |
parse_gpg_description (uid_hint, passphrase_info, |
parse_gpg_description (uid_hint, passphrase_info, |
401 |
c->info, sizeof c->info - 1); |
c->info, sizeof (c->info) - 1); |
402 |
if (c->gpg_cmd == GPG_CMD_DECRYPT) { |
if (c->gpg_cmd == GPG_CMD_DECRYPT) { |
403 |
rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT, |
rc = DialogBoxParam (glob_hinst, (LPCSTR)IDD_WINPT_DECRYPT, |
404 |
(HWND)c->hwnd, passphrase_callback_proc, |
(HWND)c->hwnd, passphrase_callback_proc, |
412 |
if (rc == -1) { |
if (rc == -1) { |
413 |
if (!WriteFile (hd, "\n", 1, &n, NULL)) |
if (!WriteFile (hd, "\n", 1, &n, NULL)) |
414 |
log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno); |
log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno); |
415 |
|
log_debug ("passphrase_cb: could not create dialog box\n"); |
416 |
return 0; |
return 0; |
417 |
} |
} |
418 |
c->pwd_init = 0; |
c->pwd_init = 0; |
419 |
} |
} |
420 |
if (c->cancel) { |
if (c->cancel || !c->pwd) { |
421 |
if (!WriteFile (hd, "\n", 1, &n, NULL)) |
if (!WriteFile (hd, "\n", 1, &n, NULL)) |
422 |
log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno); |
log_debug ("passphrase_cb: WriteFile() failed ec=%d\n", w32_errno); |
423 |
return 0; |
return 0; |
447 |
cb->pwd_init = 1; |
cb->pwd_init = 1; |
448 |
free_if_alloc (cb->title); |
free_if_alloc (cb->title); |
449 |
cb->title = m_strdup (title); |
cb->title = m_strdup (title); |
|
if (!cb->title) |
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BUG (NULL); |
|
450 |
gpgme_set_passphrase_cb (ctx, passphrase_cb, cb); |
gpgme_set_passphrase_cb (ctx, passphrase_cb, cb); |
451 |
cb->gpg = ctx; |
cb->gpg = ctx; |
452 |
} |
} |
453 |
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454 |
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455 |
/* Release a passphrase callback @ctx. */ |
/* Release the gpg recipient list. */ |
456 |
void |
void |
457 |
release_gpg_passphrase_cb (passphrase_cb_s *ctx) |
release_gpg_recipients (gpgme_recipient_t *recipients) |
458 |
{ |
{ |
459 |
gpgme_recipient_t r, n; |
gpgme_recipient_t r, n; |
460 |
|
|
461 |
if (!ctx) |
r = *recipients; |
462 |
return; |
while (r != NULL) { |
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sfree_if_alloc (ctx->pwd); |
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free_if_alloc (ctx->title); |
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r = ctx->recipients; |
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while (r) { |
|
463 |
n = r->next; |
n = r->next; |
464 |
safe_free (r->keyid); |
safe_free (r->keyid); |
465 |
safe_free (r); |
safe_free (r); |
466 |
r = n; |
r = n; |
467 |
} |
} |
468 |
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*recipients = NULL; |
469 |
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} |
470 |
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471 |
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472 |
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473 |
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/* Release a passphrase callback @ctx. */ |
474 |
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void |
475 |
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release_gpg_passphrase_cb (passphrase_cb_s *ctx) |
476 |
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{ |
477 |
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if (!ctx) |
478 |
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return; |
479 |
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sfree_if_alloc (ctx->pwd); |
480 |
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free_if_alloc (ctx->title); |
481 |
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release_gpg_recipients (&ctx->recipients); |
482 |
} |
} |
483 |
|
|
484 |
|
|
485 |
/* Simple check to measure passphrase (@pass) quality. |
/* _Simple_ check to measure passphrase (@pass) quality. |
486 |
Return value: 0 on success. */ |
Return value: 0 on success. */ |
487 |
int |
int |
488 |
check_passwd_quality (const char *pass, int strict) |
check_passwd_quality (const char *pass, int strict) |
489 |
{ |
{ |
490 |
int i, nd=0, nc=0, n; |
int i, nd=0, nc=0, n; |
491 |
|
|
492 |
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/* A good passphrase should be at least 8 characters. */ |
493 |
n = strlen (pass); |
n = strlen (pass); |
494 |
if (n < 8) |
if (n < 8) |
495 |
return -1; |
return -1; |
496 |
|
|
497 |
for (i=0; i < n; i++) { |
for (i=0; i < n; i++) { |
498 |
if (isdigit (pass[i])) |
if (isdigit (pass[i])) |
499 |
nd++; |
nd++; |
500 |
if (isalpha (pass[i])) |
if (isalpha (pass[i])) |
501 |
nc++; |
nc++; |
502 |
} |
} |
503 |
|
|
504 |
/* check that the passphrase contains letters and numbers. */ |
/* Check that the passphrase contains letters and numbers. */ |
505 |
if (nd == n || nc == n) |
if (nd == n || nc == n) |
506 |
return -1; |
return -1; |
507 |
|
|