/*
 * Copyright (c) 2015 Carsten Larsen
 * All rights reserved.
 *
 * 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 ``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 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.
 *
 */

#define ARGSFORMAT "FILES/M/A"
#define VERSION_PROG "sha512"
#include "platform.h"
#include "sha512.h"

const char *vers = VERSION_STRING_AMIGA;

struct shaargs {
    char **files;
};

int main(int argc, char **argv)
{
    int i;
    FILE *f;
    int failure = 0;
    struct shaargs args = { NULL };

    atexit(clean_exit);
    alloc_buffer();

    rdargs = ReadArgs(ARGS_FORMAT, (APTR)&args, NULL);
    if (!rdargs)
    {
        args_error(argv[0]);
        exit(5);
    }

    for (i = 0; args.files[i]; i++) {
        if ((f = fopen(args.files[i], "rb"))) {
            if (!shaFile(args.files[i], f, 0))
                failure = 1;
            fclose(f);
        }
        else {
            fprintf(stderr, "%s: %s\n",args.files[i], "No such file or directory");
            failure = 1;
        }
    }

    exit(failure);
}

int shaFile (char *name, FILE *f, int which)
{
    SHA512Context s;
    size_t len;
    uint8_t hash[SHA512_HASH_SIZE];
    int hashLen, i;
    int success = 1;

    SHA512Init (&s);

    while ((len = fread (buffer, 1, SHA_BUFFER_SIZE, f)) > 0) {
        SHA512Update (&s, buffer, len);
    }

    if (ferror (f)) {
        fprintf (stderr, "%s: %s\n", name, "Read error");
        success = 0;
    }
    else {
        SHA512Final (&s, hash);
        hashLen = SHA512_HASH_SIZE;

        for (i = 0; i < hashLen; i++)
            printf ("%02x", hash[i]);

        if (name)
            printf (" %s\n", name);
        else
            printf ("\n");
    }

    memset(&s, 0, sizeof(s));

    return success;
}