/*
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* External password backend
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* Copyright (c) 2012, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "includes.h"
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#ifdef __linux__
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#include <sys/mman.h>
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#endif /* __linux__ */
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#include "common.h"
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#include "ext_password_i.h"
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static const struct ext_password_backend *backends[] = {
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#ifdef CONFIG_EXT_PASSWORD_TEST
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&ext_password_test,
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#endif /* CONFIG_EXT_PASSWORD_TEST */
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NULL
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};
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struct ext_password_data {
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const struct ext_password_backend *backend;
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void *priv;
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};
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struct ext_password_data * ext_password_init(const char *backend,
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const char *params)
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{
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struct ext_password_data *data;
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int i;
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data = os_zalloc(sizeof(*data));
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if (data == NULL)
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return NULL;
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for (i = 0; backends[i]; i++) {
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if (os_strcmp(backends[i]->name, backend) == 0) {
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data->backend = backends[i];
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break;
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}
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}
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if (!data->backend) {
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os_free(data);
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return NULL;
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}
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data->priv = data->backend->init(params);
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if (data->priv == NULL) {
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os_free(data);
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return NULL;
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}
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return data;
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}
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void ext_password_deinit(struct ext_password_data *data)
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{
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if (data && data->backend && data->priv)
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data->backend->deinit(data->priv);
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os_free(data);
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}
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struct wpabuf * ext_password_get(struct ext_password_data *data,
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const char *name)
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{
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if (data == NULL)
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return NULL;
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return data->backend->get(data->priv, name);
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}
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struct wpabuf * ext_password_alloc(size_t len)
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{
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struct wpabuf *buf;
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buf = wpabuf_alloc(len);
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if (buf == NULL)
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return NULL;
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#ifdef __linux__
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if (mlock(wpabuf_head(buf), wpabuf_len(buf)) < 0) {
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wpa_printf(MSG_ERROR, "EXT PW: mlock failed: %s",
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strerror(errno));
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}
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#endif /* __linux__ */
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return buf;
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}
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void ext_password_free(struct wpabuf *pw)
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{
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if (pw == NULL)
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return;
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os_memset(wpabuf_mhead(pw), 0, wpabuf_len(pw));
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#ifdef __linux__
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if (munlock(wpabuf_head(pw), wpabuf_len(pw)) < 0) {
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wpa_printf(MSG_ERROR, "EXT PW: munlock failed: %s",
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strerror(errno));
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}
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#endif /* __linux__ */
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wpabuf_free(pw);
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}
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