+++ /dev/null
-/*
- * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the OpenSSL license (the "License"). You may not use
- * this file except in compliance with the License. You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
-
-#include <string.h>
-
-#include <openssl/bio.h>
-#include <openssl/x509_vfy.h>
-#include <openssl/ssl.h>
-
-#include "handshake_helper.h"
-
-/*
- * Since there appears to be no way to extract the sent/received alert
- * from the SSL object directly, we use the info callback and stash
- * the result in ex_data.
- */
-typedef struct handshake_ex_data {
- int alert_sent;
- int alert_received;
- int session_ticket_do_not_call;
-} HANDSHAKE_EX_DATA;
-
-static int ex_data_idx;
-
-static void info_callback(const SSL *s, int where, int ret)
-{
- if (where & SSL_CB_ALERT) {
- HANDSHAKE_EX_DATA *ex_data =
- (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
- if (where & SSL_CB_WRITE) {
- ex_data->alert_sent = ret;
- } else {
- ex_data->alert_received = ret;
- }
- }
-}
-
-static int verify_reject_callback(X509_STORE_CTX *ctx, void *arg) {
- X509_STORE_CTX_set_error(ctx, X509_V_ERR_APPLICATION_VERIFICATION);
- return 0;
-}
-
-static int verify_accept_callback(X509_STORE_CTX *ctx, void *arg) {
- return 1;
-}
-
-static int broken_session_ticket_callback(SSL* s, unsigned char* key_name, unsigned char *iv,
- EVP_CIPHER_CTX *ctx, HMAC_CTX *hctx, int enc)
-{
- return 0;
-}
-
-int do_not_call_session_ticket_callback(SSL* s, unsigned char* key_name, unsigned char *iv,
- EVP_CIPHER_CTX *ctx, HMAC_CTX *hctx, int enc)
-{
- HANDSHAKE_EX_DATA *ex_data =
- (HANDSHAKE_EX_DATA*)(SSL_get_ex_data(s, ex_data_idx));
- ex_data->session_ticket_do_not_call = 1;
- return 0;
-}
-
-/*
- * Configure callbacks and other properties that can't be set directly
- * in the server/client CONF.
- */
-static void configure_handshake_ctx(SSL_CTX *server_ctx, SSL_CTX *client_ctx,
- const SSL_TEST_CTX *test_ctx)
-{
- switch (test_ctx->client_verify_callback) {
- case SSL_TEST_VERIFY_ACCEPT_ALL:
- SSL_CTX_set_cert_verify_callback(client_ctx, &verify_accept_callback,
- NULL);
- break;
- case SSL_TEST_VERIFY_REJECT_ALL:
- SSL_CTX_set_cert_verify_callback(client_ctx, &verify_reject_callback,
- NULL);
- break;
- default:
- break;
- }
- if (test_ctx->session_ticket_expected == SSL_TEST_SESSION_TICKET_BROKEN) {
- SSL_CTX_set_tlsext_ticket_key_cb(server_ctx, broken_session_ticket_callback);
- }
-}
-
-/*
- * Configure callbacks and other properties that can't be set directly
- * in the server/client CONF.
- */
-static void configure_handshake_ssl(SSL *server, SSL *client,
- const SSL_TEST_CTX *test_ctx)
-{
- SSL_set_tlsext_host_name(client, ssl_servername_name(test_ctx->servername));
-}
-
-
-typedef enum {
- PEER_SUCCESS,
- PEER_RETRY,
- PEER_ERROR
-} peer_status_t;
-
-static peer_status_t do_handshake_step(SSL *ssl)
-{
- int ret;
-
- ret = SSL_do_handshake(ssl);
-
- if (ret == 1) {
- return PEER_SUCCESS;
- } else if (ret == 0) {
- return PEER_ERROR;
- } else {
- int error = SSL_get_error(ssl, ret);
- /* Memory bios should never block with SSL_ERROR_WANT_WRITE. */
- if (error == SSL_ERROR_WANT_READ)
- return PEER_RETRY;
- else
- return PEER_ERROR;
- }
-}
-
-typedef enum {
- /* Both parties succeeded. */
- HANDSHAKE_SUCCESS,
- /* Client errored. */
- CLIENT_ERROR,
- /* Server errored. */
- SERVER_ERROR,
- /* Peers are in inconsistent state. */
- INTERNAL_ERROR,
- /* One or both peers not done. */
- HANDSHAKE_RETRY
-} handshake_status_t;
-
-/*
- * Determine the handshake outcome.
- * last_status: the status of the peer to have acted last.
- * previous_status: the status of the peer that didn't act last.
- * client_spoke_last: 1 if the client went last.
- */
-static handshake_status_t handshake_status(peer_status_t last_status,
- peer_status_t previous_status,
- int client_spoke_last)
-{
- switch (last_status) {
- case PEER_SUCCESS:
- switch (previous_status) {
- case PEER_SUCCESS:
- /* Both succeeded. */
- return HANDSHAKE_SUCCESS;
- case PEER_RETRY:
- /* Let the first peer finish. */
- return HANDSHAKE_RETRY;
- case PEER_ERROR:
- /*
- * Second peer succeeded despite the fact that the first peer
- * already errored. This shouldn't happen.
- */
- return INTERNAL_ERROR;
- }
-
- case PEER_RETRY:
- if (previous_status == PEER_RETRY) {
- /* Neither peer is done. */
- return HANDSHAKE_RETRY;
- } else {
- /*
- * Deadlock: second peer is waiting for more input while first
- * peer thinks they're done (no more input is coming).
- */
- return INTERNAL_ERROR;
- }
- case PEER_ERROR:
- switch (previous_status) {
- case PEER_SUCCESS:
- /*
- * First peer succeeded but second peer errored.
- * TODO(emilia): we should be able to continue here (with some
- * application data?) to ensure the first peer receives the
- * alert / close_notify.
- */
- return client_spoke_last ? CLIENT_ERROR : SERVER_ERROR;
- case PEER_RETRY:
- /* We errored; let the peer finish. */
- return HANDSHAKE_RETRY;
- case PEER_ERROR:
- /* Both peers errored. Return the one that errored first. */
- return client_spoke_last ? SERVER_ERROR : CLIENT_ERROR;
- }
- }
- /* Control should never reach here. */
- return INTERNAL_ERROR;
-}
-
-HANDSHAKE_RESULT do_handshake(SSL_CTX *server_ctx, SSL_CTX *client_ctx,
- const SSL_TEST_CTX *test_ctx)
-{
- SSL *server, *client;
- BIO *client_to_server, *server_to_client;
- HANDSHAKE_EX_DATA server_ex_data, client_ex_data;
- HANDSHAKE_RESULT ret;
- int client_turn = 1;
- peer_status_t client_status = PEER_RETRY, server_status = PEER_RETRY;
- handshake_status_t status = HANDSHAKE_RETRY;
- unsigned char* tick = NULL;
- size_t len = 0;
- SSL_SESSION* sess = NULL;
-
- configure_handshake_ctx(server_ctx, client_ctx, test_ctx);
-
- server = SSL_new(server_ctx);
- client = SSL_new(client_ctx);
- OPENSSL_assert(server != NULL && client != NULL);
-
- configure_handshake_ssl(server, client, test_ctx);
-
- memset(&server_ex_data, 0, sizeof(server_ex_data));
- memset(&client_ex_data, 0, sizeof(client_ex_data));
- memset(&ret, 0, sizeof(ret));
- ret.result = SSL_TEST_INTERNAL_ERROR;
-
- client_to_server = BIO_new(BIO_s_mem());
- server_to_client = BIO_new(BIO_s_mem());
-
- OPENSSL_assert(client_to_server != NULL && server_to_client != NULL);
-
- /* Non-blocking bio. */
- BIO_set_nbio(client_to_server, 1);
- BIO_set_nbio(server_to_client, 1);
-
- SSL_set_connect_state(client);
- SSL_set_accept_state(server);
-
- /* The bios are now owned by the SSL object. */
- SSL_set_bio(client, server_to_client, client_to_server);
- OPENSSL_assert(BIO_up_ref(server_to_client) > 0);
- OPENSSL_assert(BIO_up_ref(client_to_server) > 0);
- SSL_set_bio(server, client_to_server, server_to_client);
-
- ex_data_idx = SSL_get_ex_new_index(0, "ex data", NULL, NULL, NULL);
- OPENSSL_assert(ex_data_idx >= 0);
-
- OPENSSL_assert(SSL_set_ex_data(server, ex_data_idx,
- &server_ex_data) == 1);
- OPENSSL_assert(SSL_set_ex_data(client, ex_data_idx,
- &client_ex_data) == 1);
-
- SSL_set_info_callback(server, &info_callback);
- SSL_set_info_callback(client, &info_callback);
-
- /*
- * Half-duplex handshake loop.
- * Client and server speak to each other synchronously in the same process.
- * We use non-blocking BIOs, so whenever one peer blocks for read, it
- * returns PEER_RETRY to indicate that it's the other peer's turn to write.
- * The handshake succeeds once both peers have succeeded. If one peer
- * errors out, we also let the other peer retry (and presumably fail).
- */
- for(;;) {
- if (client_turn) {
- client_status = do_handshake_step(client);
- status = handshake_status(client_status, server_status,
- 1 /* client went last */);
- } else {
- server_status = do_handshake_step(server);
- status = handshake_status(server_status, client_status,
- 0 /* server went last */);
- }
-
- switch (status) {
- case HANDSHAKE_SUCCESS:
- ret.result = SSL_TEST_SUCCESS;
- goto err;
- case CLIENT_ERROR:
- ret.result = SSL_TEST_CLIENT_FAIL;
- goto err;
- case SERVER_ERROR:
- ret.result = SSL_TEST_SERVER_FAIL;
- goto err;
- case INTERNAL_ERROR:
- ret.result = SSL_TEST_INTERNAL_ERROR;
- goto err;
- case HANDSHAKE_RETRY:
- /* Continue. */
- client_turn ^= 1;
- break;
- }
- }
- err:
- ret.server_alert_sent = server_ex_data.alert_sent;
- ret.server_alert_received = client_ex_data.alert_received;
- ret.client_alert_sent = client_ex_data.alert_sent;
- ret.client_alert_received = server_ex_data.alert_received;
- ret.server_protocol = SSL_version(server);
- ret.client_protocol = SSL_version(client);
- ret.servername = ((SSL_get_SSL_CTX(server) == server_ctx)
- ? SSL_TEST_SERVERNAME_SERVER1
- : SSL_TEST_SERVERNAME_SERVER2);
- if ((sess = SSL_get0_session(client)) != NULL)
- SSL_SESSION_get0_ticket(sess, &tick, &len);
- if (tick == NULL || len == 0)
- ret.session_ticket = SSL_TEST_SESSION_TICKET_NO;
- else
- ret.session_ticket = SSL_TEST_SESSION_TICKET_YES;
- ret.session_ticket_do_not_call = server_ex_data.session_ticket_do_not_call;
-
- SSL_free(server);
- SSL_free(client);
- return ret;
-}
projects / openssl.git / blobdiff