/*-
 * Copyright (c) 2014-2015 Carsten Larsen
 * Copyright (c) 2001-2003 Allan Saddi <allan@saddi.com>
 * 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 ALLAN SADDI AND HIS 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 ALLAN SADDI OR HIS 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.
 *
 */

#include "platform.h"
#include "sha1.h"
#include "sha256.h"
#include "sha384.h"
#include "sha512.h"

int shaFile (char *name, FILE *f, int which)
{
    union {
        SHA1Context sha1;
        SHA256Context sha256;
        SHA384Context sha384;
        SHA512Context sha512;
    } s;
    size_t len;
    uint8_t hash[SHA512_HASH_SIZE];
    int hashLen, i;
    int success = 1;

    switch (which) {
    case 1:
        SHA1Init (&s.sha1);
        break;
    case 2:
        SHA256Init (&s.sha256);
        break;
    case 3:
        SHA384Init (&s.sha384);
        break;
    case 5:
        SHA512Init (&s.sha512);
        break;
    default:
        abort ();
    }

    while ((len = fread (buffer, 1, SHA_BUFFER_SIZE, f)) > 0) {
        switch (which) {
        case 1:
            SHA1Update (&s.sha1, buffer, len);
            break;
        case 2:
            SHA256Update (&s.sha256, buffer, len);
            break;
        case 3:
            SHA384Update (&s.sha384, buffer, len);
            break;
        case 5:
            SHA512Update (&s.sha512, buffer, len);
            break;
        default:
            abort ();
        }
    }

    if (ferror (f)) {
        fprintf (stderr, "%s: %s\n", name, "Read error");
        success = 0;
    }
    else {
        switch (which) {
        case 1:
            SHA1Final (&s.sha1, hash);
            hashLen = SHA1_HASH_SIZE;
            break;
        case 2:
            SHA256Final (&s.sha256, hash);
            hashLen = SHA256_HASH_SIZE;
            break;
        case 3:
            SHA384Final (&s.sha384, hash);
            hashLen = SHA384_HASH_SIZE;
            break;
        case 5:
            SHA512Final (&s.sha512, hash);
            hashLen = SHA512_HASH_SIZE;
            break;
        default:
            abort ();
        }

        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;
}