1 /*
2 * External password backend
3 * Copyright (c) 2012, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #include "utils/includes.h"
10
11 #include "utils/common.h"
12 #include "ext_password_i.h"
13
14 #ifdef CONFIG_EXT_PASSWORD_TEST
15 extern struct ext_password_backend ext_password_test;
16 #endif /* CONFIG_EXT_PASSWORD_TEST */
17
18 #ifdef CONFIG_EXT_PASSWORD
19 static const struct ext_password_backend *backends[] = {
20 #ifdef CONFIG_EXT_PASSWORD_TEST
21 &ext_password_test,
22 #endif /* CONFIG_EXT_PASSWORD_TEST */
23 NULL
24 };
25 #endif
26
27 struct ext_password_data {
28 const struct ext_password_backend *backend;
29 void *priv;
30 };
31
32 #ifdef CONFIG_EXT_PASSWORD
ext_password_init(const char * backend,const char * params)33 struct ext_password_data * ext_password_init(const char *backend,
34 const char *params)
35 {
36 struct ext_password_data *data;
37 int i;
38
39 data = (struct ext_password_data *)os_zalloc(sizeof(*data));
40 if (data == NULL)
41 return NULL;
42
43 for (i = 0; backends[i]; i++) {
44 if (os_strcmp(backends[i]->name, backend) == 0) {
45 data->backend = backends[i];
46 break;
47 }
48 }
49
50 if (!data->backend) {
51 os_free(data);
52 return NULL;
53 }
54
55 data->priv = data->backend->init(params);
56 if (data->priv == NULL) {
57 os_free(data);
58 return NULL;
59 }
60
61 return data;
62 }
63
64
ext_password_deinit(struct ext_password_data * data)65 void ext_password_deinit(struct ext_password_data *data)
66 {
67 if (data && data->backend && data->priv)
68 data->backend->deinit(data->priv);
69 os_free(data);
70 }
71
72
ext_password_get(struct ext_password_data * data,const char * name)73 struct wpabuf * ext_password_get(struct ext_password_data *data,
74 const char *name)
75 {
76 if (data == NULL)
77 return NULL;
78 return data->backend->get(data->priv, name);
79 }
80 #endif /* CONFIG_EXT_PASSWORD */
81
ext_password_alloc(size_t len)82 struct wpabuf * ext_password_alloc(size_t len)
83 {
84 struct wpabuf *buf;
85
86 buf = wpabuf_alloc(len);
87 if (buf == NULL)
88 return NULL;
89
90 #ifdef __linux__
91 if (mlock(wpabuf_head(buf), wpabuf_len(buf)) < 0) {
92 wpa_printf(MSG_ERROR, "EXT PW: mlock failed: %s",
93 strerror(errno));
94 }
95 #endif /* __linux__ */
96
97 return buf;
98 }
99
100 #ifdef CONFIG_EXT_PASSWORD
ext_password_free(struct wpabuf * pw)101 void ext_password_free(struct wpabuf *pw)
102 {
103 if (pw == NULL)
104 return;
105 os_memset(wpabuf_mhead(pw), 0, wpabuf_len(pw));
106 #ifdef __linux__
107 if (munlock(wpabuf_head(pw), wpabuf_len(pw)) < 0) {
108 wpa_printf(MSG_ERROR, "EXT PW: munlock failed: %s",
109 strerror(errno));
110 }
111 #endif /* __linux__ */
112 wpabuf_free(pw);
113 }
114 #endif /* CONFIG_EXT_PASSWORD */
115
