mirror of
https://github.com/vanhoefm/fragattacks.git
synced 2024-12-04 21:28:27 -05:00
0764dd6849
This extends multi-OCSP support to verify status for intermediate CAs in the server certificate chain. Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
765 lines
18 KiB
C
765 lines
18 KiB
C
/*
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* TLS interface functions and an internal TLS implementation
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* Copyright (c) 2004-2011, 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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* This file interface functions for hostapd/wpa_supplicant to use the
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* integrated TLSv1 implementation.
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*/
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#include "includes.h"
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#include "common.h"
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#include "tls.h"
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#include "tls/tlsv1_client.h"
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#include "tls/tlsv1_server.h"
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static int tls_ref_count = 0;
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struct tls_global {
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int server;
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struct tlsv1_credentials *server_cred;
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int check_crl;
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void (*event_cb)(void *ctx, enum tls_event ev,
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union tls_event_data *data);
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void *cb_ctx;
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int cert_in_cb;
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};
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struct tls_connection {
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struct tlsv1_client *client;
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struct tlsv1_server *server;
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struct tls_global *global;
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};
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void * tls_init(const struct tls_config *conf)
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{
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struct tls_global *global;
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if (tls_ref_count == 0) {
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#ifdef CONFIG_TLS_INTERNAL_CLIENT
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if (tlsv1_client_global_init())
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return NULL;
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#endif /* CONFIG_TLS_INTERNAL_CLIENT */
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#ifdef CONFIG_TLS_INTERNAL_SERVER
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if (tlsv1_server_global_init())
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return NULL;
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#endif /* CONFIG_TLS_INTERNAL_SERVER */
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}
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tls_ref_count++;
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global = os_zalloc(sizeof(*global));
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if (global == NULL)
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return NULL;
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if (conf) {
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global->event_cb = conf->event_cb;
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global->cb_ctx = conf->cb_ctx;
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global->cert_in_cb = conf->cert_in_cb;
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}
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return global;
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}
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void tls_deinit(void *ssl_ctx)
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{
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struct tls_global *global = ssl_ctx;
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tls_ref_count--;
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if (tls_ref_count == 0) {
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#ifdef CONFIG_TLS_INTERNAL_CLIENT
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tlsv1_client_global_deinit();
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#endif /* CONFIG_TLS_INTERNAL_CLIENT */
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#ifdef CONFIG_TLS_INTERNAL_SERVER
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tlsv1_server_global_deinit();
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#endif /* CONFIG_TLS_INTERNAL_SERVER */
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}
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#ifdef CONFIG_TLS_INTERNAL_SERVER
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tlsv1_cred_free(global->server_cred);
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#endif /* CONFIG_TLS_INTERNAL_SERVER */
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os_free(global);
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}
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int tls_get_errors(void *tls_ctx)
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{
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return 0;
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}
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struct tls_connection * tls_connection_init(void *tls_ctx)
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{
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struct tls_connection *conn;
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struct tls_global *global = tls_ctx;
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conn = os_zalloc(sizeof(*conn));
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if (conn == NULL)
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return NULL;
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conn->global = global;
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#ifdef CONFIG_TLS_INTERNAL_CLIENT
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if (!global->server) {
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conn->client = tlsv1_client_init();
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if (conn->client == NULL) {
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os_free(conn);
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return NULL;
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}
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tlsv1_client_set_cb(conn->client, global->event_cb,
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global->cb_ctx, global->cert_in_cb);
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}
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#endif /* CONFIG_TLS_INTERNAL_CLIENT */
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#ifdef CONFIG_TLS_INTERNAL_SERVER
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if (global->server) {
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conn->server = tlsv1_server_init(global->server_cred);
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if (conn->server == NULL) {
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os_free(conn);
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return NULL;
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}
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}
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#endif /* CONFIG_TLS_INTERNAL_SERVER */
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return conn;
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}
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#ifdef CONFIG_TESTING_OPTIONS
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#ifdef CONFIG_TLS_INTERNAL_SERVER
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void tls_connection_set_test_flags(struct tls_connection *conn, u32 flags)
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{
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if (conn->server)
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tlsv1_server_set_test_flags(conn->server, flags);
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}
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#endif /* CONFIG_TLS_INTERNAL_SERVER */
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#endif /* CONFIG_TESTING_OPTIONS */
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void tls_connection_set_log_cb(struct tls_connection *conn,
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void (*log_cb)(void *ctx, const char *msg),
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void *ctx)
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{
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#ifdef CONFIG_TLS_INTERNAL_SERVER
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if (conn->server)
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tlsv1_server_set_log_cb(conn->server, log_cb, ctx);
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#endif /* CONFIG_TLS_INTERNAL_SERVER */
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}
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void tls_connection_deinit(void *tls_ctx, struct tls_connection *conn)
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{
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if (conn == NULL)
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return;
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#ifdef CONFIG_TLS_INTERNAL_CLIENT
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if (conn->client)
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tlsv1_client_deinit(conn->client);
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#endif /* CONFIG_TLS_INTERNAL_CLIENT */
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#ifdef CONFIG_TLS_INTERNAL_SERVER
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if (conn->server)
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tlsv1_server_deinit(conn->server);
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#endif /* CONFIG_TLS_INTERNAL_SERVER */
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os_free(conn);
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}
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int tls_connection_established(void *tls_ctx, struct tls_connection *conn)
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{
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#ifdef CONFIG_TLS_INTERNAL_CLIENT
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if (conn->client)
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return tlsv1_client_established(conn->client);
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#endif /* CONFIG_TLS_INTERNAL_CLIENT */
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#ifdef CONFIG_TLS_INTERNAL_SERVER
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if (conn->server)
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return tlsv1_server_established(conn->server);
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#endif /* CONFIG_TLS_INTERNAL_SERVER */
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return 0;
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}
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int tls_connection_shutdown(void *tls_ctx, struct tls_connection *conn)
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{
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#ifdef CONFIG_TLS_INTERNAL_CLIENT
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if (conn->client)
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return tlsv1_client_shutdown(conn->client);
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#endif /* CONFIG_TLS_INTERNAL_CLIENT */
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#ifdef CONFIG_TLS_INTERNAL_SERVER
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if (conn->server)
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return tlsv1_server_shutdown(conn->server);
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#endif /* CONFIG_TLS_INTERNAL_SERVER */
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return -1;
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}
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int tls_connection_set_params(void *tls_ctx, struct tls_connection *conn,
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const struct tls_connection_params *params)
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{
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#ifdef CONFIG_TLS_INTERNAL_CLIENT
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struct tlsv1_credentials *cred;
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if (conn->client == NULL)
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return -1;
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if (params->flags & TLS_CONN_EXT_CERT_CHECK) {
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wpa_printf(MSG_INFO,
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"TLS: tls_ext_cert_check=1 not supported");
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return -1;
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}
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cred = tlsv1_cred_alloc();
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if (cred == NULL)
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return -1;
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if (params->subject_match) {
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wpa_printf(MSG_INFO, "TLS: subject_match not supported");
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tlsv1_cred_free(cred);
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return -1;
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}
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if (params->altsubject_match) {
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wpa_printf(MSG_INFO, "TLS: altsubject_match not supported");
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tlsv1_cred_free(cred);
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return -1;
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}
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if (params->suffix_match) {
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wpa_printf(MSG_INFO, "TLS: suffix_match not supported");
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tlsv1_cred_free(cred);
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return -1;
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}
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if (params->domain_match) {
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wpa_printf(MSG_INFO, "TLS: domain_match not supported");
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tlsv1_cred_free(cred);
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return -1;
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}
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if (params->openssl_ciphers) {
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wpa_printf(MSG_INFO, "TLS: openssl_ciphers not supported");
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tlsv1_cred_free(cred);
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return -1;
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}
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if (tlsv1_set_ca_cert(cred, params->ca_cert,
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params->ca_cert_blob, params->ca_cert_blob_len,
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params->ca_path)) {
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wpa_printf(MSG_INFO, "TLS: Failed to configure trusted CA "
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"certificates");
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tlsv1_cred_free(cred);
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return -1;
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}
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if (tlsv1_set_cert(cred, params->client_cert,
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params->client_cert_blob,
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params->client_cert_blob_len)) {
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wpa_printf(MSG_INFO, "TLS: Failed to configure client "
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"certificate");
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tlsv1_cred_free(cred);
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return -1;
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}
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if (tlsv1_set_private_key(cred, params->private_key,
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params->private_key_passwd,
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params->private_key_blob,
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params->private_key_blob_len)) {
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wpa_printf(MSG_INFO, "TLS: Failed to load private key");
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tlsv1_cred_free(cred);
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return -1;
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}
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if (tlsv1_set_dhparams(cred, params->dh_file, params->dh_blob,
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params->dh_blob_len)) {
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wpa_printf(MSG_INFO, "TLS: Failed to load DH parameters");
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tlsv1_cred_free(cred);
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return -1;
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}
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if (tlsv1_client_set_cred(conn->client, cred) < 0) {
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tlsv1_cred_free(cred);
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return -1;
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}
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tlsv1_client_set_flags(conn->client, params->flags);
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return 0;
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#else /* CONFIG_TLS_INTERNAL_CLIENT */
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return -1;
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#endif /* CONFIG_TLS_INTERNAL_CLIENT */
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}
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int tls_global_set_params(void *tls_ctx,
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const struct tls_connection_params *params)
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{
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#ifdef CONFIG_TLS_INTERNAL_SERVER
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struct tls_global *global = tls_ctx;
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struct tlsv1_credentials *cred;
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/* Currently, global parameters are only set when running in server
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* mode. */
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global->server = 1;
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tlsv1_cred_free(global->server_cred);
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global->server_cred = cred = tlsv1_cred_alloc();
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if (cred == NULL)
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return -1;
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if (tlsv1_set_ca_cert(cred, params->ca_cert, params->ca_cert_blob,
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params->ca_cert_blob_len, params->ca_path)) {
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wpa_printf(MSG_INFO, "TLS: Failed to configure trusted CA "
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"certificates");
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return -1;
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}
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if (tlsv1_set_cert(cred, params->client_cert, params->client_cert_blob,
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params->client_cert_blob_len)) {
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wpa_printf(MSG_INFO, "TLS: Failed to configure server "
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"certificate");
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return -1;
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}
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if (tlsv1_set_private_key(cred, params->private_key,
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params->private_key_passwd,
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params->private_key_blob,
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params->private_key_blob_len)) {
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wpa_printf(MSG_INFO, "TLS: Failed to load private key");
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return -1;
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}
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if (tlsv1_set_dhparams(cred, params->dh_file, params->dh_blob,
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params->dh_blob_len)) {
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wpa_printf(MSG_INFO, "TLS: Failed to load DH parameters");
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return -1;
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}
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if (params->ocsp_stapling_response)
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cred->ocsp_stapling_response =
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os_strdup(params->ocsp_stapling_response);
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if (params->ocsp_stapling_response_multi)
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cred->ocsp_stapling_response_multi =
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os_strdup(params->ocsp_stapling_response_multi);
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return 0;
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#else /* CONFIG_TLS_INTERNAL_SERVER */
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return -1;
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#endif /* CONFIG_TLS_INTERNAL_SERVER */
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}
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int tls_global_set_verify(void *tls_ctx, int check_crl)
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{
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struct tls_global *global = tls_ctx;
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global->check_crl = check_crl;
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return 0;
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}
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int tls_connection_set_verify(void *tls_ctx, struct tls_connection *conn,
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int verify_peer, unsigned int flags,
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const u8 *session_ctx, size_t session_ctx_len)
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{
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#ifdef CONFIG_TLS_INTERNAL_SERVER
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if (conn->server)
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return tlsv1_server_set_verify(conn->server, verify_peer);
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#endif /* CONFIG_TLS_INTERNAL_SERVER */
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return -1;
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}
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int tls_connection_get_random(void *tls_ctx, struct tls_connection *conn,
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struct tls_random *data)
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{
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#ifdef CONFIG_TLS_INTERNAL_CLIENT
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if (conn->client)
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return tlsv1_client_get_random(conn->client, data);
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#endif /* CONFIG_TLS_INTERNAL_CLIENT */
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#ifdef CONFIG_TLS_INTERNAL_SERVER
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if (conn->server)
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return tlsv1_server_get_random(conn->server, data);
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#endif /* CONFIG_TLS_INTERNAL_SERVER */
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return -1;
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}
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static int tls_get_keyblock_size(struct tls_connection *conn)
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{
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#ifdef CONFIG_TLS_INTERNAL_CLIENT
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if (conn->client)
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return tlsv1_client_get_keyblock_size(conn->client);
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#endif /* CONFIG_TLS_INTERNAL_CLIENT */
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#ifdef CONFIG_TLS_INTERNAL_SERVER
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if (conn->server)
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return tlsv1_server_get_keyblock_size(conn->server);
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#endif /* CONFIG_TLS_INTERNAL_SERVER */
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return -1;
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}
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int tls_connection_prf(void *tls_ctx, struct tls_connection *conn,
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const char *label, int server_random_first,
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int skip_keyblock, u8 *out, size_t out_len)
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{
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int ret = -1, skip = 0;
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u8 *tmp_out = NULL;
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u8 *_out = out;
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if (skip_keyblock) {
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skip = tls_get_keyblock_size(conn);
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if (skip < 0)
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return -1;
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tmp_out = os_malloc(skip + out_len);
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if (!tmp_out)
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return -1;
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_out = tmp_out;
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}
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#ifdef CONFIG_TLS_INTERNAL_CLIENT
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if (conn->client) {
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ret = tlsv1_client_prf(conn->client, label,
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server_random_first,
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_out, skip + out_len);
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}
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#endif /* CONFIG_TLS_INTERNAL_CLIENT */
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#ifdef CONFIG_TLS_INTERNAL_SERVER
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if (conn->server) {
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ret = tlsv1_server_prf(conn->server, label,
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server_random_first,
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_out, skip + out_len);
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}
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#endif /* CONFIG_TLS_INTERNAL_SERVER */
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if (ret == 0 && skip_keyblock)
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os_memcpy(out, _out + skip, out_len);
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bin_clear_free(tmp_out, skip);
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return ret;
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}
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struct wpabuf * tls_connection_handshake(void *tls_ctx,
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struct tls_connection *conn,
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const struct wpabuf *in_data,
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struct wpabuf **appl_data)
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{
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return tls_connection_handshake2(tls_ctx, conn, in_data, appl_data,
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NULL);
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}
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struct wpabuf * tls_connection_handshake2(void *tls_ctx,
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struct tls_connection *conn,
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const struct wpabuf *in_data,
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struct wpabuf **appl_data,
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int *need_more_data)
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{
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#ifdef CONFIG_TLS_INTERNAL_CLIENT
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u8 *res, *ad;
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size_t res_len, ad_len;
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struct wpabuf *out;
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if (conn->client == NULL)
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return NULL;
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ad = NULL;
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res = tlsv1_client_handshake(conn->client,
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in_data ? wpabuf_head(in_data) : NULL,
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in_data ? wpabuf_len(in_data) : 0,
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&res_len, &ad, &ad_len, need_more_data);
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if (res == NULL)
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return NULL;
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out = wpabuf_alloc_ext_data(res, res_len);
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if (out == NULL) {
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os_free(res);
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os_free(ad);
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return NULL;
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}
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if (appl_data) {
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if (ad) {
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*appl_data = wpabuf_alloc_ext_data(ad, ad_len);
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if (*appl_data == NULL)
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os_free(ad);
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} else
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*appl_data = NULL;
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} else
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os_free(ad);
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return out;
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#else /* CONFIG_TLS_INTERNAL_CLIENT */
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return NULL;
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#endif /* CONFIG_TLS_INTERNAL_CLIENT */
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}
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struct wpabuf * tls_connection_server_handshake(void *tls_ctx,
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struct tls_connection *conn,
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const struct wpabuf *in_data,
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struct wpabuf **appl_data)
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{
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#ifdef CONFIG_TLS_INTERNAL_SERVER
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u8 *res;
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size_t res_len;
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struct wpabuf *out;
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if (conn->server == NULL)
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return NULL;
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if (appl_data)
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*appl_data = NULL;
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res = tlsv1_server_handshake(conn->server, wpabuf_head(in_data),
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wpabuf_len(in_data), &res_len);
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if (res == NULL && tlsv1_server_established(conn->server))
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return wpabuf_alloc(0);
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if (res == NULL)
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return NULL;
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out = wpabuf_alloc_ext_data(res, res_len);
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if (out == NULL) {
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os_free(res);
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return NULL;
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}
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return out;
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#else /* CONFIG_TLS_INTERNAL_SERVER */
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return NULL;
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#endif /* CONFIG_TLS_INTERNAL_SERVER */
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}
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struct wpabuf * tls_connection_encrypt(void *tls_ctx,
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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)
|
|
{
|
|
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_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)
|
|
{
|
|
}
|
|
|
|
|
|
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)
|
|
{
|
|
}
|