1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283 |
- /* $MirOS: contrib/hosted/fwcf/header.c,v 1.7 2006/09/26 10:25:03 tg Exp $ */
- /*-
- * Copyright (c) 2006
- * Thorsten Glaser <tg@mirbsd.de>
- *
- * Licensee is hereby permitted to deal in this work without restric-
- * tion, including unlimited rights to use, publicly perform, modify,
- * merge, distribute, sell, give away or sublicence, provided all co-
- * pyright notices above, these terms and the disclaimer are retained
- * in all redistributions or reproduced in accompanying documentation
- * or other materials provided with binary redistributions.
- *
- * Licensor offers the work "AS IS" and WITHOUT WARRANTY of any kind,
- * express, or implied, to the maximum extent permitted by applicable
- * law, without malicious intent or gross negligence; in no event may
- * licensor, an author or contributor be held liable for any indirect
- * or other damage, or direct damage except proven a consequence of a
- * direct error of said person and intended use of this work, loss or
- * other issues arising in any way out of its use, even if advised of
- * the possibility of such damage or existence of a defect.
- */
- #include <sys/param.h>
- #include <err.h>
- #include <stdio.h>
- #include <stdlib.h>
- #ifdef DEBUG_ADLER
- #include <zlib.h>
- #endif
- #include "defs.h"
- #include "adler.h"
- #include "pack.h"
- __RCSID("$MirOS: contrib/hosted/fwcf/header.c,v 1.7 2006/09/26 10:25:03 tg Exp $"
- "\t" ADLER_H);
- char *
- mkheader(char *f_header, size_t hdrsize, uint32_t outer_len,
- uint32_t inner_len, uint8_t algo)
- {
- char *hdrptr = f_header;
- size_t hdrleft = hdrsize;
- #ifdef DEBUG
- fprintf(stderr, "header: inner=%d outer=%d\n", inner_len & 0xFFFFFF,
- outer_len & 0xFFFFFF);
- #endif
- STOREB('F');
- STOREB('W');
- STOREB('C');
- STOREB('F');
- outer_len = (outer_len & 0xFFFFFF) | (FWCF_VER << 24);
- STORED(outer_len);
- inner_len = (inner_len & 0xFFFFFF) | (algo << 24);
- STORED(inner_len);
- return (hdrptr);
- }
- char *
- mktrailer(char *data, size_t len)
- {
- char *hdrptr = data + len;
- size_t hdrleft = 4;
- ADLER_DECL;
- #ifdef DEBUG_ADLER
- uint32_t adler = adler32(1, (uint8_t *)data, len);
- #endif
- ADLER_CALC(data);
- #ifdef DEBUG_ADLER
- if ((s1 != (adler & 0xFFFF)) || (s2 != (adler >> 16)))
- errx(255, "adler32 implementation error: %04X%04X vs %08X",
- s2, s1, adler);
- #endif
- STOREW(s1);
- STOREW(s2);
- return (data);
- }
|