projects / thirdparty / hostap.git / blame
| Commit | Line | Data |
|---|---|---|
| 306ae225 JM |
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 | ||
| 306ae225 JM |
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 | ||
| 26 | struct ext_password_data { | |
| 27 | const struct ext_password_backend *backend; | |
| 28 | void *priv; | |
| 29 | }; | |
| 30 | ||
| 31 | ||
| 32 | struct ext_password_data * ext_password_init(const char *backend, | |
| 33 | const char *params) | |
| 34 | { | |
| 35 | struct ext_password_data *data; | |
| 36 | int i; | |
| 37 | ||
| 38 | data = os_zalloc(sizeof(*data)); | |
| 39 | if (data == NULL) | |
| 40 | return NULL; | |
| 41 | ||
| 42 | for (i = 0; backends[i]; i++) { | |
| 43 | if (os_strcmp(backends[i]->name, backend) == 0) { | |
| 44 | data->backend = backends[i]; | |
| 45 | break; | |
| 46 | } | |
| 47 | } | |
| 48 | ||
| 49 | if (!data->backend) { | |
| 50 | os_free(data); | |
| 51 | return NULL; | |
| 52 | } | |
| 53 | ||
| 54 | data->priv = data->backend->init(params); | |
| 55 | if (data->priv == NULL) { | |
| 56 | os_free(data); | |
| 57 | return NULL; | |
| 58 | } | |
| 59 | ||
| 60 | return data; | |
| 61 | } | |
| 62 | ||
| 63 | ||
| 64 | void ext_password_deinit(struct ext_password_data *data) | |
| 65 | { | |
| 66 | if (data && data->backend && data->priv) | |
| 67 | data->backend->deinit(data->priv); | |
| 68 | os_free(data); | |
| 69 | } | |
| 70 | ||
| 71 | ||
| 72 | struct wpabuf * ext_password_get(struct ext_password_data *data, | |
| 73 | const char *name) | |
| 74 | { | |
| 75 | if (data == NULL) | |
| 76 | return NULL; | |
| 77 | return data->backend->get(data->priv, name); | |
| 78 | } | |
| 79 | ||
| 80 | ||
| 81 | struct wpabuf * ext_password_alloc(size_t len) | |
| 82 | { | |
| 83 | struct wpabuf *buf; | |
| 84 | ||
| 85 | buf = wpabuf_alloc(len); | |
| 86 | if (buf == NULL) | |
| 87 | return NULL; | |
| 88 | ||
| 89 | #ifdef __linux__ | |
| 90 | if (mlock(wpabuf_head(buf), wpabuf_len(buf)) < 0) { | |
| 91 | wpa_printf(MSG_ERROR, "EXT PW: mlock failed: %s", | |
| 92 | strerror(errno)); | |
| 93 | } | |
| 94 | #endif /* __linux__ */ | |
| 95 | ||
| 96 | return buf; | |
| 97 | } | |
| 98 | ||
| 99 | ||
| 100 | void ext_password_free(struct wpabuf *pw) | |
| 101 | { | |
| 102 | if (pw == NULL) | |
| 103 | return; | |
| 104 | os_memset(wpabuf_mhead(pw), 0, wpabuf_len(pw)); | |
| 105 | #ifdef __linux__ | |
| 106 | if (munlock(wpabuf_head(pw), wpabuf_len(pw)) < 0) { | |
| 107 | wpa_printf(MSG_ERROR, "EXT PW: munlock failed: %s", | |
| 108 | strerror(errno)); | |
| 109 | } | |
| 110 | #endif /* __linux__ */ | |
| 111 | wpabuf_free(pw); | |
| 112 | } |