/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2014 The FreeBSD Foundation
 *
 * This software was developed by Edward Tomasz Napierala under sponsorship
 * from the FreeBSD Foundation.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef EFISIGN_H
#define EFISIGN_H

#include <stdbool.h>
#include <openssl/evp.h>

#define DIGEST          "SHA256"
#define MAX_SECTIONS    128

struct executable {
        const char      *x_path;
        FILE            *x_fp;

        char            *x_buf;
        size_t          x_len;

        /*
         * Set by pe_parse(), used by digest().
         */
        size_t          x_headers_len;

        off_t           x_checksum_off;
        size_t          x_checksum_len;

        off_t           x_certificate_entry_off;
        size_t          x_certificate_entry_len;

        int             x_nsections;
        off_t           x_section_off[MAX_SECTIONS];
        size_t          x_section_len[MAX_SECTIONS];

        /*
         * Computed by digest().
         */
        unsigned char   x_digest[EVP_MAX_MD_SIZE];
        unsigned int    x_digest_len;

        /*
         * Received from the parent process, which computes it in sign().
         */
        void            *x_signature;
        size_t          x_signature_len;
};


FILE    *checked_fopen(const char *path, const char *mode);
void    send_chunk(const void *buf, size_t len, int pipefd);
void    receive_chunk(void **bufp, size_t *lenp, int pipefd);

int     child(const char *inpath, const char *outpath, int pipefd,
            bool Vflag, bool vflag);

void    parse(struct executable *x);
void    update(struct executable *x);
size_t  signature_size(const struct executable *x);
void    show_certificate(const struct executable *x);
void    range_check(const struct executable *x,
            off_t off, size_t len, const char *name);

#endif /* !EFISIGN_H */