hostap/src/crypto/tls_internal.c

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/*
* TLS interface functions and an internal TLS implementation
* Copyright (c) 2004-2011, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*
* This file interface functions for hostapd/wpa_supplicant to use the
* integrated TLSv1 implementation.
*/
#include "includes.h"
#include "common.h"
#include "tls.h"
#include "tls/tlsv1_client.h"
#include "tls/tlsv1_server.h"
static int tls_ref_count = 0;
struct tls_global {
int server;
struct tlsv1_credentials *server_cred;
int check_crl;
};
struct tls_connection {
struct tlsv1_client *client;
struct tlsv1_server *server;
};
void * tls_init(const struct tls_config *conf)
{
struct tls_global *global;
if (tls_ref_count == 0) {
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (tlsv1_client_global_init())
return NULL;
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (tlsv1_server_global_init())
return NULL;
#endif /* CONFIG_TLS_INTERNAL_SERVER */
}
tls_ref_count++;
global = os_zalloc(sizeof(*global));
if (global == NULL)
return NULL;
return global;
}
void tls_deinit(void *ssl_ctx)
{
struct tls_global *global = ssl_ctx;
tls_ref_count--;
if (tls_ref_count == 0) {
#ifdef CONFIG_TLS_INTERNAL_CLIENT
tlsv1_client_global_deinit();
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
tlsv1_cred_free(global->server_cred);
tlsv1_server_global_deinit();
#endif /* CONFIG_TLS_INTERNAL_SERVER */
}
os_free(global);
}
int tls_get_errors(void *tls_ctx)
{
return 0;
}
struct tls_connection * tls_connection_init(void *tls_ctx)
{
struct tls_connection *conn;
struct tls_global *global = tls_ctx;
conn = os_zalloc(sizeof(*conn));
if (conn == NULL)
return NULL;
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (!global->server) {
conn->client = tlsv1_client_init();
if (conn->client == NULL) {
os_free(conn);
return NULL;
}
}
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (global->server) {
conn->server = tlsv1_server_init(global->server_cred);
if (conn->server == NULL) {
os_free(conn);
return NULL;
}
}
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return conn;
}
void tls_connection_deinit(void *tls_ctx, struct tls_connection *conn)
{
if (conn == NULL)
return;
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (conn->client)
tlsv1_client_deinit(conn->client);
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server)
tlsv1_server_deinit(conn->server);
#endif /* CONFIG_TLS_INTERNAL_SERVER */
os_free(conn);
}
int tls_connection_established(void *tls_ctx, struct tls_connection *conn)
{
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (conn->client)
return tlsv1_client_established(conn->client);
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server)
return tlsv1_server_established(conn->server);
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return 0;
}
int tls_connection_shutdown(void *tls_ctx, struct tls_connection *conn)
{
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (conn->client)
return tlsv1_client_shutdown(conn->client);
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server)
return tlsv1_server_shutdown(conn->server);
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return -1;
}
int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
const struct tls_connection_params *params)
{
#ifdef CONFIG_TLS_INTERNAL_CLIENT
struct tlsv1_credentials *cred;
if (conn->client == NULL)
return -1;
cred = tlsv1_cred_alloc();
if (cred == NULL)
return -1;
if (tlsv1_set_ca_cert(cred, params->ca_cert,
params->ca_cert_blob, params->ca_cert_blob_len,
params->ca_path)) {
wpa_printf(MSG_INFO, "TLS: Failed to configure trusted CA "
"certificates");
tlsv1_cred_free(cred);
return -1;
}
if (tlsv1_set_cert(cred, params->client_cert,
params->client_cert_blob,
params->client_cert_blob_len)) {
wpa_printf(MSG_INFO, "TLS: Failed to configure client "
"certificate");
tlsv1_cred_free(cred);
return -1;
}
if (tlsv1_set_private_key(cred, params->private_key,
params->private_key_passwd,
params->private_key_blob,
params->private_key_blob_len)) {
wpa_printf(MSG_INFO, "TLS: Failed to load private key");
tlsv1_cred_free(cred);
return -1;
}
if (tlsv1_set_dhparams(cred, params->dh_file, params->dh_blob,
params->dh_blob_len)) {
wpa_printf(MSG_INFO, "TLS: Failed to load DH parameters");
tlsv1_cred_free(cred);
return -1;
}
if (tlsv1_client_set_cred(conn->client, cred) < 0) {
tlsv1_cred_free(cred);
return -1;
}
tlsv1_client_set_time_checks(
conn->client, !(params->flags & TLS_CONN_DISABLE_TIME_CHECKS));
return 0;
#else /* CONFIG_TLS_INTERNAL_CLIENT */
return -1;
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
}
int tls_global_set_params(void *tls_ctx,
const struct tls_connection_params *params)
{
#ifdef CONFIG_TLS_INTERNAL_SERVER
struct tls_global *global = tls_ctx;
struct tlsv1_credentials *cred;
/* Currently, global parameters are only set when running in server
* mode. */
global->server = 1;
tlsv1_cred_free(global->server_cred);
global->server_cred = cred = tlsv1_cred_alloc();
if (cred == NULL)
return -1;
if (tlsv1_set_ca_cert(cred, params->ca_cert, params->ca_cert_blob,
params->ca_cert_blob_len, params->ca_path)) {
wpa_printf(MSG_INFO, "TLS: Failed to configure trusted CA "
"certificates");
return -1;
}
if (tlsv1_set_cert(cred, params->client_cert, params->client_cert_blob,
params->client_cert_blob_len)) {
wpa_printf(MSG_INFO, "TLS: Failed to configure server "
"certificate");
return -1;
}
if (tlsv1_set_private_key(cred, params->private_key,
params->private_key_passwd,
params->private_key_blob,
params->private_key_blob_len)) {
wpa_printf(MSG_INFO, "TLS: Failed to load private key");
return -1;
}
if (tlsv1_set_dhparams(cred, params->dh_file, params->dh_blob,
params->dh_blob_len)) {
wpa_printf(MSG_INFO, "TLS: Failed to load DH parameters");
return -1;
}
return 0;
#else /* CONFIG_TLS_INTERNAL_SERVER */
return -1;
#endif /* CONFIG_TLS_INTERNAL_SERVER */
}
int tls_global_set_verify(void *tls_ctx, int check_crl)
{
struct tls_global *global = tls_ctx;
global->check_crl = check_crl;
return 0;
}
int tls_connection_set_verify(void *tls_ctx, struct tls_connection *conn,
int verify_peer)
{
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server)
return tlsv1_server_set_verify(conn->server, verify_peer);
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return -1;
}
int tls_connection_get_keys(void *tls_ctx, struct tls_connection *conn,
struct tls_keys *keys)
{
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (conn->client)
return tlsv1_client_get_keys(conn->client, keys);
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server)
return tlsv1_server_get_keys(conn->server, keys);
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return -1;
}
int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
const char *label, int server_random_first,
u8 *out, size_t out_len)
{
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (conn->client) {
return tlsv1_client_prf(conn->client, label,
server_random_first,
out, out_len);
}
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server) {
return tlsv1_server_prf(conn->server, label,
server_random_first,
out, out_len);
}
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return -1;
}
struct wpabuf * tls_connection_handshake(void *tls_ctx,
struct tls_connection *conn,
const struct wpabuf *in_data,
struct wpabuf **appl_data)
{
return tls_connection_handshake2(tls_ctx, conn, in_data, appl_data,
NULL);
}
struct wpabuf * tls_connection_handshake2(void *tls_ctx,
struct tls_connection *conn,
const struct wpabuf *in_data,
struct wpabuf **appl_data,
int *need_more_data)
{
#ifdef CONFIG_TLS_INTERNAL_CLIENT
u8 *res, *ad;
size_t res_len, ad_len;
struct wpabuf *out;
if (conn->client == NULL)
return NULL;
ad = NULL;
res = tlsv1_client_handshake(conn->client,
in_data ? wpabuf_head(in_data) : NULL,
in_data ? wpabuf_len(in_data) : 0,
&res_len, &ad, &ad_len, need_more_data);
if (res == NULL)
return NULL;
out = wpabuf_alloc_ext_data(res, res_len);
if (out == NULL) {
os_free(res);
os_free(ad);
return NULL;
}
if (appl_data) {
if (ad) {
*appl_data = wpabuf_alloc_ext_data(ad, ad_len);
if (*appl_data == NULL)
os_free(ad);
} else
*appl_data = NULL;
} else
os_free(ad);
return out;
#else /* CONFIG_TLS_INTERNAL_CLIENT */
return NULL;
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
}
struct wpabuf * tls_connection_server_handshake(void *tls_ctx,
struct tls_connection *conn,
const struct wpabuf *in_data,
struct wpabuf **appl_data)
{
#ifdef CONFIG_TLS_INTERNAL_SERVER
u8 *res;
size_t res_len;
struct wpabuf *out;
if (conn->server == NULL)
return NULL;
if (appl_data)
*appl_data = NULL;
res = tlsv1_server_handshake(conn->server, wpabuf_head(in_data),
wpabuf_len(in_data), &res_len);
if (res == NULL && tlsv1_server_established(conn->server))
return wpabuf_alloc(0);
if (res == NULL)
return NULL;
out = wpabuf_alloc_ext_data(res, res_len);
if (out == NULL) {
os_free(res);
return NULL;
}
return out;
#else /* CONFIG_TLS_INTERNAL_SERVER */
return NULL;
#endif /* CONFIG_TLS_INTERNAL_SERVER */
}
struct wpabuf * tls_connection_encrypt(void *tls_ctx,
struct tls_connection *conn,
const struct wpabuf *in_data)
{
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (conn->client) {
struct wpabuf *buf;
int res;
buf = wpabuf_alloc(wpabuf_len(in_data) + 300);
if (buf == NULL)
return NULL;
res = tlsv1_client_encrypt(conn->client, wpabuf_head(in_data),
wpabuf_len(in_data),
wpabuf_mhead(buf),
wpabuf_size(buf));
if (res < 0) {
wpabuf_free(buf);
return NULL;
}
wpabuf_put(buf, res);
return buf;
}
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server) {
struct wpabuf *buf;
int res;
buf = wpabuf_alloc(wpabuf_len(in_data) + 300);
if (buf == NULL)
return NULL;
res = tlsv1_server_encrypt(conn->server, wpabuf_head(in_data),
wpabuf_len(in_data),
wpabuf_mhead(buf),
wpabuf_size(buf));
if (res < 0) {
wpabuf_free(buf);
return NULL;
}
wpabuf_put(buf, res);
return buf;
}
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return NULL;
}
struct wpabuf * tls_connection_decrypt(void *tls_ctx,
struct tls_connection *conn,
const struct wpabuf *in_data)
{
return tls_connection_decrypt2(tls_ctx, conn, in_data, NULL);
}
struct wpabuf * tls_connection_decrypt2(void *tls_ctx,
struct tls_connection *conn,
const struct wpabuf *in_data,
int *need_more_data)
{
if (need_more_data)
*need_more_data = 0;
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (conn->client) {
return tlsv1_client_decrypt(conn->client, wpabuf_head(in_data),
wpabuf_len(in_data),
need_more_data);
}
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server) {
struct wpabuf *buf;
int res;
buf = wpabuf_alloc((wpabuf_len(in_data) + 500) * 3);
if (buf == NULL)
return NULL;
res = tlsv1_server_decrypt(conn->server, wpabuf_head(in_data),
wpabuf_len(in_data),
wpabuf_mhead(buf),
wpabuf_size(buf));
if (res < 0) {
wpabuf_free(buf);
return NULL;
}
wpabuf_put(buf, res);
return buf;
}
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return NULL;
}
int tls_connection_resumed(void *tls_ctx, struct tls_connection *conn)
{
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (conn->client)
return tlsv1_client_resumed(conn->client);
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server)
return tlsv1_server_resumed(conn->server);
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return -1;
}
int tls_connection_set_cipher_list(void *tls_ctx, struct tls_connection *conn,
u8 *ciphers)
{
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (conn->client)
return tlsv1_client_set_cipher_list(conn->client, ciphers);
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server)
return tlsv1_server_set_cipher_list(conn->server, ciphers);
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return -1;
}
int tls_get_cipher(void *tls_ctx, struct tls_connection *conn,
char *buf, size_t buflen)
{
if (conn == NULL)
return -1;
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (conn->client)
return tlsv1_client_get_cipher(conn->client, buf, buflen);
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server)
return tlsv1_server_get_cipher(conn->server, buf, buflen);
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return -1;
}
int tls_connection_enable_workaround(void *tls_ctx,
struct tls_connection *conn)
{
return -1;
}
int tls_connection_client_hello_ext(void *tls_ctx, struct tls_connection *conn,
int ext_type, const u8 *data,
size_t data_len)
{
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (conn->client) {
return tlsv1_client_hello_ext(conn->client, ext_type,
data, data_len);
}
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
return -1;
}
int tls_connection_get_failed(void *tls_ctx, struct tls_connection *conn)
{
return 0;
}
int tls_connection_get_read_alerts(void *tls_ctx, struct tls_connection *conn)
{
return 0;
}
int tls_connection_get_write_alerts(void *tls_ctx,
struct tls_connection *conn)
{
return 0;
}
int tls_connection_get_keyblock_size(void *tls_ctx,
struct tls_connection *conn)
{
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (conn->client)
return tlsv1_client_get_keyblock_size(conn->client);
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server)
return tlsv1_server_get_keyblock_size(conn->server);
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return -1;
}
unsigned int tls_capabilities(void *tls_ctx)
{
return 0;
}
int tls_connection_set_session_ticket_cb(void *tls_ctx,
struct tls_connection *conn,
tls_session_ticket_cb cb,
void *ctx)
{
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (conn->client) {
tlsv1_client_set_session_ticket_cb(conn->client, cb, ctx);
return 0;
}
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server) {
tlsv1_server_set_session_ticket_cb(conn->server, cb, ctx);
return 0;
}
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return -1;
}