HANDSHAKE_RESULT *do_handshake(SSL_CTX *server_ctx, SSL_CTX *server2_ctx,
                               SSL_CTX *client_ctx, SSL_CTX *resume_server_ctx,
                               SSL_CTX *resume_client_ctx,
                               const SSL_TEST_CTX *test_ctx)
{
    HANDSHAKE_RESULT *result;
    SSL_SESSION *session = NULL;

    result = do_handshake_internal(server_ctx, server2_ctx, client_ctx,
                                   &test_ctx->extra, NULL, &session);
    if (test_ctx->handshake_mode == SSL_TEST_HANDSHAKE_SIMPLE)
        goto end;

    OPENSSL_assert(test_ctx->handshake_mode == SSL_TEST_HANDSHAKE_RESUME);

    if (result->result != SSL_TEST_SUCCESS) {
        result->result = SSL_TEST_FIRST_HANDSHAKE_FAILED;
        return result;
    }

    HANDSHAKE_RESULT_free(result);
    /* We don't support SNI on second handshake yet, so server2_ctx is NULL. */
    result = do_handshake_internal(resume_server_ctx, NULL, resume_client_ctx,
                                   &test_ctx->resume_extra, session, NULL);
 end:
    SSL_SESSION_free(session);
    return result;
}