1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/* w32-reg.c - MS-Windows Registry access
* Copyright (C) 1999, 2002, 2007 Free Software Foundation, Inc.
*
* This file is part of JNLIB, which is a subsystem of GnuPG.
*
* JNLIB is free software; you can redistribute it and/or modify it
* under the terms of either
*
* - the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* or
*
* - 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.
*
* or both in parallel, as here.
*
* JNLIB 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 copies of the GNU General Public License
* and the GNU Lesser General Public License along with this program;
* if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#ifdef HAVE_W32_SYSTEM
/* This module is only used in this environment */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#ifdef HAVE_WINSOCK2_H
# include <winsock2.h>
#endif
#include <windows.h>
#include "libjnlib-config.h"
#include "utf8conv.h"
#include "w32help.h"
static HKEY
get_root_key(const char *root)
{
HKEY root_key;
if (!root)
root_key = HKEY_CURRENT_USER;
else if (!strcmp( root, "HKEY_CLASSES_ROOT" ) )
root_key = HKEY_CLASSES_ROOT;
else if (!strcmp( root, "HKEY_CURRENT_USER" ) )
root_key = HKEY_CURRENT_USER;
else if (!strcmp( root, "HKEY_LOCAL_MACHINE" ) )
root_key = HKEY_LOCAL_MACHINE;
else if (!strcmp( root, "HKEY_USERS" ) )
root_key = HKEY_USERS;
else if (!strcmp( root, "HKEY_PERFORMANCE_DATA" ) )
root_key = HKEY_PERFORMANCE_DATA;
else if (!strcmp( root, "HKEY_CURRENT_CONFIG" ) )
root_key = HKEY_CURRENT_CONFIG;
else
return NULL;
return root_key;
}
/* Return a string from the Win32 Registry or NULL in case of error.
Caller must release the return value. A NULL for root is an alias
for HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE in turn. */
char *
read_w32_registry_string (const char *root, const char *dir, const char *name)
{
#ifdef HAVE_W32CE_SYSTEM
HKEY root_key, key_handle;
DWORD n1, nbytes, type;
char *result = NULL;
wchar_t *wdir, *wname;
if ( !(root_key = get_root_key(root) ) )
return NULL;
wdir = utf8_to_wchar (dir);
if (!wdir)
return NULL;
if (RegOpenKeyEx (root_key, wdir, 0, KEY_READ, &key_handle) )
{
if (root)
{
jnlib_free (wdir);
return NULL; /* No need for a RegClose, so return immediately. */
}
/* It seems to be common practise to fall back to HKLM. */
if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, wdir, 0, KEY_READ, &key_handle) )
{
jnlib_free (wdir);
return NULL; /* Still no need for a RegClose. */
}
}
jnlib_free (wdir);
if (name)
{
wname = utf8_to_wchar (name);
if (!wname)
goto leave;
}
else
wname = NULL;
nbytes = 2;
if (RegQueryValueEx (key_handle, wname, 0, NULL, NULL, &nbytes))
goto leave;
result = jnlib_malloc ((n1=nbytes+2));
if (!result)
goto leave;
if (RegQueryValueEx (key_handle, wname, 0, &type, result, &n1))
{
jnlib_free (result);
result = NULL;
goto leave;
}
result[nbytes] = 0; /* Make sure it is a string. */
result[nbytes+1] = 0;
if (type == REG_SZ || type == REG_EXPAND_SZ)
{
wchar_t *tmp = (void*)result;
result = wchar_to_utf8 (tmp);
jnlib_free (tmp);
}
leave:
jnlib_free (wname);
RegCloseKey (key_handle);
return result;
#else /*!HAVE_W32CE_SYSTEM*/
HKEY root_key, key_handle;
DWORD n1, nbytes, type;
char *result = NULL;
if ( !(root_key = get_root_key(root) ) )
return NULL;
if (RegOpenKeyEx (root_key, dir, 0, KEY_READ, &key_handle) )
{
if (root)
return NULL; /* No need for a RegClose, so return immediately. */
/* It seems to be common practise to fall back to HKLM. */
if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, dir, 0, KEY_READ, &key_handle) )
return NULL; /* Still no need for a RegClose. */
}
nbytes = 1;
if (RegQueryValueEx( key_handle, name, 0, NULL, NULL, &nbytes ) )
goto leave;
result = jnlib_malloc ((n1=nbytes+1));
if (!result)
goto leave;
if (RegQueryValueEx( key_handle, name, 0, &type, result, &n1 ))
{
jnlib_free (result);
result = NULL;
goto leave;
}
result[nbytes] = 0; /* Make sure it is a string. */
if (type == REG_EXPAND_SZ && strchr (result, '%'))
{
char *tmp;
n1 += 1000;
tmp = jnlib_malloc (n1+1);
if (!tmp)
goto leave;
nbytes = ExpandEnvironmentStrings (result, tmp, n1);
if (nbytes && nbytes > n1)
{
jnlib_free (tmp);
n1 = nbytes;
tmp = jnlib_malloc (n1 + 1);
if (!tmp)
goto leave;
nbytes = ExpandEnvironmentStrings (result, tmp, n1);
if (nbytes && nbytes > n1)
{
/* Oops - truncated, better don't expand at all. */
jnlib_free (tmp);
goto leave;
}
tmp[nbytes] = 0;
jnlib_free (result);
result = tmp;
}
else if (nbytes)
{
/* Okay, reduce the length. */
tmp[nbytes] = 0;
jnlib_free (result);
result = jnlib_malloc (strlen (tmp)+1);
if (!result)
result = tmp;
else
{
strcpy (result, tmp);
jnlib_free (tmp);
}
}
else
{
/* Error - don't expand. */
jnlib_free (tmp);
}
}
leave:
RegCloseKey (key_handle);
return result;
#endif /*!HAVE_W32CE_SYSTEM*/
}
#endif /*HAVE_W32_SYSTEM*/
|
