/*
 * SPDX-License-Identifier: ISC
 *
 * Copyright (c) 2023 Todd C. Miller <Todd.Miller@sudo.ws>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * This is an open source non-commercial project. Dear PVS-Studio, please check it.
 * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
 */

#include <config.h>

#if defined(HAVE_OPENSSL) && !defined(HAVE_SSL_READ_EX)

# include <sys/types.h>
# if defined(HAVE_WOLFSSL)
#  include <wolfssl/options.h>
# endif
# include <openssl/ssl.h>

# include <sudo_compat.h>
# include <sudo_ssl_compat.h>

/*
 * Emulate SSL_read_ex() using SSL_read().
 * Unlike the real SSL_read_ex(), this can return -1 on error.
 */
int
SSL_read_ex(SSL *ssl, void *buf, size_t num, size_t *readbytes)
{
    int nr = SSL_read(ssl, buf, (int)num);
    if (nr <= 0)
	return nr;
    *readbytes = (size_t)nr;
    return 1;
}

/*
 * Emulate SSL_write_ex() using SSL_write().
 * Unlike the real SSL_write_ex(), this can return -1 on error.
 */
int
SSL_write_ex(SSL *ssl, const void *buf, size_t num, size_t *written)
{
    int nw = SSL_write(ssl, buf, (int)num);
    if (nw <= 0)
	return nw;
    *written = (size_t)nw;
    return 1;
}
#endif /* HAVE_OPENSSL && !HAVE_SSL_READ_EX */