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 "includes.h" 10 11 #ifdef __linux__ 12 #include <sys/mman.h> 13 #endif /* __linux__ */ 14 15 #include "common.h" 16 #include "ext_password_i.h" 17 18 19 #ifdef CONFIG_EXT_PASSWORD_TEST 20 extern struct ext_password_backend ext_password_test; 21 #endif /* CONFIG_EXT_PASSWORD_TEST */ 22 23 static const struct ext_password_backend *backends[] = { 24 #ifdef CONFIG_EXT_PASSWORD_TEST 25 &ext_password_test, 26 #endif /* CONFIG_EXT_PASSWORD_TEST */ 27 NULL 28 }; 29 30 struct ext_password_data { 31 const struct ext_password_backend *backend; 32 void *priv; 33 }; 34 35 36 struct ext_password_data * ext_password_init(const char *backend, 37 const char *params) 38 { 39 struct ext_password_data *data; 40 int i; 41 42 data = os_zalloc(sizeof(*data)); 43 if (data == NULL) 44 return NULL; 45 46 for (i = 0; backends[i]; i++) { 47 if (os_strcmp(backends[i]->name, backend) == 0) { 48 data->backend = backends[i]; 49 break; 50 } 51 } 52 53 if (!data->backend) { 54 os_free(data); 55 return NULL; 56 } 57 58 data->priv = data->backend->init(params); 59 if (data->priv == NULL) { 60 os_free(data); 61 return NULL; 62 } 63 64 return data; 65 } 66 67 68 void ext_password_deinit(struct ext_password_data *data) 69 { 70 if (data && data->backend && data->priv) 71 data->backend->deinit(data->priv); 72 os_free(data); 73 } 74 75 76 struct wpabuf * ext_password_get(struct ext_password_data *data, 77 const char *name) 78 { 79 if (data == NULL) 80 return NULL; 81 return data->backend->get(data->priv, name); 82 } 83 84 85 struct wpabuf * ext_password_alloc(size_t len) 86 { 87 struct wpabuf *buf; 88 89 buf = wpabuf_alloc(len); 90 if (buf == NULL) 91 return NULL; 92 93 #ifdef __linux__ 94 if (mlock(wpabuf_head(buf), wpabuf_len(buf)) < 0) { 95 wpa_printf(MSG_ERROR, "EXT PW: mlock failed: %s", 96 strerror(errno)); 97 } 98 #endif /* __linux__ */ 99 100 return buf; 101 } 102 103 104 void ext_password_free(struct wpabuf *pw) 105 { 106 if (pw == NULL) 107 return; 108 os_memset(wpabuf_mhead(pw), 0, wpabuf_len(pw)); 109 #ifdef __linux__ 110 if (munlock(wpabuf_head(pw), wpabuf_len(pw)) < 0) { 111 wpa_printf(MSG_ERROR, "EXT PW: munlock failed: %s", 112 strerror(errno)); 113 } 114 #endif /* __linux__ */ 115 wpabuf_free(pw); 116 } 117