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/*
* TLS interface functions and an internal TLS implementation
* Copyright (c) 2004-2019, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README 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;
void (*event_cb)(void *ctx, enum tls_event ev,
union tls_event_data *data);
void *cb_ctx;
int cert_in_cb;
};
struct tls_connection {
struct tlsv1_client *client;
struct tlsv1_server *server;
struct tls_global *global;
};
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;
if (conf) {
global->event_cb = conf->event_cb;
global->cb_ctx = conf->cb_ctx;
global->cert_in_cb = conf->cert_in_cb;
}
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_server_global_deinit();
#endif /* CONFIG_TLS_INTERNAL_SERVER */
}
#ifdef CONFIG_TLS_INTERNAL_SERVER
tlsv1_cred_free(global->server_cred);
#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;
conn->global = global;
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (!global->server) {
conn->client = tlsv1_client_init();
if (conn->client == NULL) {
os_free(conn);
return NULL;
}
tlsv1_client_set_cb(conn->client, global->event_cb,
global->cb_ctx, global->cert_in_cb);
}
#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;
}
#ifdef CONFIG_TESTING_OPTIONS
#ifdef CONFIG_TLS_INTERNAL_SERVER
void tls_connection_set_test_flags(struct tls_connection *conn, u32 flags)
{
if (conn->server)
tlsv1_server_set_test_flags(conn->server, flags);
}
#endif /* CONFIG_TLS_INTERNAL_SERVER */
#endif /* CONFIG_TESTING_OPTIONS */
void tls_connection_set_log_cb(struct tls_connection *conn,
void (*log_cb)(void *ctx, const char *msg),
void *ctx)
{
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server)
tlsv1_server_set_log_cb(conn->server, log_cb, ctx);
#endif /* CONFIG_TLS_INTERNAL_SERVER */
}
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;
}
char * tls_connection_peer_serial_num(void *tls_ctx,
struct tls_connection *conn)
{
/* TODO */
return NULL;
}
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;
if (params->flags & TLS_CONN_EXT_CERT_CHECK) {
wpa_printf(MSG_INFO,
"TLS: tls_ext_cert_check=1 not supported");
return -1;
}
cred = tlsv1_cred_alloc();
if (cred == NULL)
return -1;
if (params->subject_match) {
wpa_printf(MSG_INFO, "TLS: subject_match not supported");
tlsv1_cred_free(cred);
return -1;
}
if (params->altsubject_match) {
wpa_printf(MSG_INFO, "TLS: altsubject_match not supported");
tlsv1_cred_free(cred);
return -1;
}
if (params->suffix_match) {
wpa_printf(MSG_INFO, "TLS: suffix_match not supported");
tlsv1_cred_free(cred);
return -1;
}
if (params->domain_match) {
wpa_printf(MSG_INFO, "TLS: domain_match not supported");
tlsv1_cred_free(cred);
return -1;
}
if (params->openssl_ciphers) {
wpa_printf(MSG_INFO, "TLS: openssl_ciphers not supported");
tlsv1_cred_free(cred);
return -1;
}
if (params->openssl_ecdh_curves) {
wpa_printf(MSG_INFO, "TLS: openssl_ecdh_curves not supported");
tlsv1_cred_free(cred);
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_client_set_cred(conn->client, cred) < 0) {
tlsv1_cred_free(cred);
return -1;
}
tlsv1_client_set_flags(conn->client, params->flags);
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;
if (params->check_cert_subject)
return -1; /* not yet supported */
/* 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;
}
if (params->ocsp_stapling_response)
cred->ocsp_stapling_response =
os_strdup(params->ocsp_stapling_response);
if (params->ocsp_stapling_response_multi)
cred->ocsp_stapling_response_multi =
os_strdup(params->ocsp_stapling_response_multi);
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, int strict)
{
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, unsigned int flags,
const u8 *session_ctx, size_t session_ctx_len)
{
#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_random(void *tls_ctx, struct tls_connection *conn,
struct tls_random *data)
{
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (conn->client)
return tlsv1_client_get_random(conn->client, data);
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server)
return tlsv1_server_get_random(conn->server, data);
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return -1;
}
static int tls_get_keyblock_size(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;
}
static int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
const char *label, const u8 *context,
size_t context_len, int server_random_first,
int skip_keyblock, u8 *out, size_t out_len)
{
int ret = -1, skip = 0;
u8 *tmp_out = NULL;
u8 *_out = out;
if (skip_keyblock) {
skip = tls_get_keyblock_size(conn);
if (skip < 0)
return -1;
tmp_out = os_malloc(skip + out_len);
if (!tmp_out)
return -1;
_out = tmp_out;
}
#ifdef CONFIG_TLS_INTERNAL_CLIENT
if (conn->client) {
ret = tlsv1_client_prf(conn->client, label, context,
context_len, server_random_first,
_out, skip + out_len);
}
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server) {
ret = tlsv1_server_prf(conn->server, label, context,
context_len, server_random_first,
_out, skip + out_len);
}
#endif /* CONFIG_TLS_INTERNAL_SERVER */
if (ret == 0 && skip_keyblock)
os_memcpy(out, _out + skip, out_len);
bin_clear_free(tmp_out, skip);
return ret;
}
int tls_connection_export_key(void *tls_ctx, struct tls_connection *conn,
const char *label, const u8 *context,
size_t context_len, u8 *out, size_t out_len)
{
return tls_connection_prf(tls_ctx, conn, label, context, context_len,
0, 0, out, out_len);
}
int tls_connection_get_eap_fast_key(void *tls_ctx, struct tls_connection *conn,
u8 *out, size_t out_len)
{
return tls_connection_prf(tls_ctx, conn, "key expansion", NULL, 0,
1, 1, out, out_len);
}
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_version(void *ssl_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_version(conn->client, buf, buflen);
#endif /* CONFIG_TLS_INTERNAL_CLIENT */
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)
{
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server)
return tlsv1_server_get_failed(conn->server);
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return 0;
}
int tls_connection_get_read_alerts(void *tls_ctx, struct tls_connection *conn)
{
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server)
return tlsv1_server_get_read_alerts(conn->server);
#endif /* CONFIG_TLS_INTERNAL_SERVER */
return 0;
}
int tls_connection_get_write_alerts(void *tls_ctx,
struct tls_connection *conn)
{
#ifdef CONFIG_TLS_INTERNAL_SERVER
if (conn->server)
return tlsv1_server_get_write_alerts(conn->server);
#endif /* CONFIG_TLS_INTERNAL_SERVER */
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;
}
int tls_get_library_version(char *buf, size_t buf_len)
{
return os_snprintf(buf, buf_len, "internal");
}
void tls_connection_set_success_data(struct tls_connection *conn,
struct wpabuf *data)
{
wpabuf_free(data);
}
void tls_connection_set_success_data_resumed(struct tls_connection *conn)
{
}
const struct wpabuf *
tls_connection_get_success_data(struct tls_connection *conn)
{
return NULL;
}
void tls_connection_remove_session(struct tls_connection *conn)
{
}
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