diff options
Diffstat (limited to 'lzlib.c')
| -rw-r--r-- | lzlib.c | 46 |
1 files changed, 23 insertions, 23 deletions
@@ -1,28 +1,20 @@ /* Lzlib - Compression library for the lzip format - Copyright (C) 2009-2016 Antonio Diaz Diaz. + Copyright (C) 2009-2017 Antonio Diaz Diaz. - This library is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation, either version 2 of the License, or - (at your option) any later version. + This library is free software. 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 library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this library. If not, see <http://www.gnu.org/licenses/>. - - As a special exception, you may use this file as part of a free - software library without restriction. Specifically, if other files - instantiate templates or use macros or inline functions from this - file, or you compile this file and link it with other files to - produce an executable, this file does not by itself cause the - resulting executable to be covered by the GNU General Public - License. This exception does not however invalidate any other - reasons why the executable file might be covered by the GNU General - Public License. + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. */ #include <stdbool.h> @@ -387,7 +379,7 @@ int LZ_decompress_reset( struct LZ_Decoder * const d ) int LZ_decompress_sync_to_member( struct LZ_Decoder * const d ) { - int skipped = 0; + unsigned skipped = 0; if( !verify_decoder( d ) ) return -1; if( d->lz_decoder ) { LZd_free( d->lz_decoder ); free( d->lz_decoder ); d->lz_decoder = 0; } @@ -434,7 +426,7 @@ int LZ_decompress_read( struct LZ_Decoder * const d, d->fatal = true; return -1; } - if( !Fh_verify( d->member_header ) ) + if( !Fh_verify_magic( d->member_header ) ) { /* unreading the header prevents sync_to_member from skipping a member if leading garbage is shorter than a full header; "lgLZIP\x01\x0C" */ @@ -445,6 +437,13 @@ int LZ_decompress_read( struct LZ_Decoder * const d, d->fatal = true; return -1; } + if( !Fh_verify_version( d->member_header ) || + !isvalid_ds( Fh_get_dictionary_size( d->member_header ) ) ) + { + d->lz_errno = LZ_data_error; /* bad version or bad dict size */ + d->fatal = true; + return -1; + } d->first_header = false; if( Rd_available_bytes( d->rdec ) < 5 ) { @@ -493,7 +492,8 @@ int LZ_decompress_write( struct LZ_Decoder * const d, result = Rd_write_data( d->rdec, buffer, size ); while( d->seeking ) { - int size2, skipped = 0; + int size2; + unsigned skipped = 0; if( Rd_find_header( d->rdec, &skipped ) ) d->seeking = false; d->partial_in_size += skipped; if( result >= size ) break; |