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5de785e23b
LAR archive, the LAR utility will segfault. This is reproduced easily by zerofilling the LAR, then adding anything to it. Looking at the code, the reason is obvious: lar_empty_offset() can return an error code (-1). None of the callers check for an error code, they simply assume the return value is valid. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Peter Stuge <peter@stuge.se> git-svn-id: svn://coreboot.org/repository/coreboot-v3@647 f3766cd6-281f-0410-b1cd-43a5c92072e9
142 lines
5 KiB
C
142 lines
5 KiB
C
/*
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* lar - lightweight archiver
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*
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* Copyright (C) 2006 coresystems GmbH
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* (Written by Stefan Reinauer <stepan@coresystems.de> for coresystems GmbH)
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* Copyright (C) 2007 Patrick Georgi <patrick@georgi-clan.de>
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*
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* This file is dual-licensed. You can choose between:
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* - The GNU GPL, version 2, as published by the Free Software Foundation
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* - The revised BSD license (without advertising clause)
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*
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* ---------------------------------------------------------------------------
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
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* ---------------------------------------------------------------------------
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* ---------------------------------------------------------------------------
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*/
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#include <stdint.h>
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#define MAGIC "LARCHIVE"
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#define MAX_PATHLEN 1024
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#define BOOTBLOCK_SIZE 20480
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#define BOOTBLOCK_NAME "bootblock"
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#define BOOTBLOCK_NAME_LEN 16
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typedef uint64_t u64;
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typedef int64_t s64;
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typedef uint32_t u32;
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typedef int32_t s32;
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typedef uint8_t u8;
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/* NOTE -- This and the coreboot lar.h may NOT be in sync. Be careful. */
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struct lar_header {
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char magic[8];
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u32 len;
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u32 reallen;
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u32 checksum;
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u32 compchecksum;
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/* Filenames are limited to 2^31-1-sizeof(lar_header)-1 bytes.
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* "Nobody will ever need more than 640k" */
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u32 offset;
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/* Compression:
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* 0 = no compression
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* 1 = lzma
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* 2 = nrv2b
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* 3 = zeroes
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*/
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u32 compression;
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u64 entry;
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u64 loadaddress;
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};
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/**\struct
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* A structure containing information about a currently open and mapped
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* LAR archive
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*/
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struct lar {
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int fd; /**< The file descriptor of the open archive */
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u8 *map; /**< A pointer to the mmap()ed file */
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u32 size; /**< Size of the mmaped file */
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};
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enum compalgo {
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ALGO_NONE = 0,
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ALGO_LZMA = 1,
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ALGO_NRV2B = 2,
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ALGO_ZEROES = 3,
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/* invalid should always be the last entry. */
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ALGO_INVALID
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};
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typedef void (*compress_func) (char *, int, char *, int *);
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typedef void (*uncompress_func) (char *, int, char *, int);
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void compress_impossible(char *in, int in_len, char *out, int *out_len);
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void do_no_compress(char *in, int in_len, char *out, int *out_len);
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void do_lzma_compress(char *in, int in_len, char *out, int *out_len);
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void do_nrv2b_compress(char *in, int in_len, char *out, int *out_len);
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void do_zeroes_compress(char *in, int in_len, char *out, int *out_len);
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void uncompress_impossible(char *dst, int dst_len, char *src, int src_len);
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void do_no_uncompress(char *dst, int dst_len, char *src, int src_len);
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void do_lzma_uncompress(char *dst, int dst_len, char *src, int src_len);
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void do_nrv2b_uncompress(char *dst, int dst_len, char *src, int src_len);
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void do_zeroes_uncompress(char *dst, int dst_len, char *src, int src_len);
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static compress_func compress_functions[] = {
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do_no_compress,
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do_lzma_compress,
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do_nrv2b_compress,
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do_zeroes_compress,
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};
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static uncompress_func uncompress_functions[] = {
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do_no_uncompress,
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do_lzma_uncompress,
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do_nrv2b_uncompress,
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do_zeroes_uncompress,
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};
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static const char *algo_name[] = {
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"none",
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"lzma",
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"nrv2b",
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"zeroes",
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/* invalid should always be the last entry. */
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"invalid"
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};
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