diff options
Diffstat (limited to 'plugins/updater/bzip2-1.0.3/unzcrash.c')
-rw-r--r-- | plugins/updater/bzip2-1.0.3/unzcrash.c | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/plugins/updater/bzip2-1.0.3/unzcrash.c b/plugins/updater/bzip2-1.0.3/unzcrash.c deleted file mode 100644 index 7041da51c9..0000000000 --- a/plugins/updater/bzip2-1.0.3/unzcrash.c +++ /dev/null @@ -1,141 +0,0 @@ - -/* A test program written to test robustness to decompression of - corrupted data. Usage is - unzcrash filename - and the program will read the specified file, compress it (in memory), - and then repeatedly decompress it, each time with a different bit of - the compressed data inverted, so as to test all possible one-bit errors. - This should not cause any invalid memory accesses. If it does, - I want to know about it! - - PS. As you can see from the above description, the process is - incredibly slow. A file of size eg 5KB will cause it to run for - many hours. -*/ - -/* ------------------------------------------------------------------ - This file is part of bzip2/libbzip2, a program and library for - lossless, block-sorting data compression. - - bzip2/libbzip2 version 1.0.6 of 6 September 2010 - Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org> - - Please read the WARNING, DISCLAIMER and PATENTS sections in the - README file. - - This program is released under the terms of the license contained - in the file LICENSE. - ------------------------------------------------------------------ */ - - -#include <stdio.h> -#include <assert.h> -#include "bzlib.h" - -#define M_BLOCK 1000000 - -typedef unsigned char uchar; - -#define M_BLOCK_OUT (M_BLOCK + 1000000) -uchar inbuf[M_BLOCK]; -uchar outbuf[M_BLOCK_OUT]; -uchar zbuf[M_BLOCK + 600 + (M_BLOCK / 100)]; - -int nIn, nOut, nZ; - -static char *bzerrorstrings[] = { - "OK" - ,"SEQUENCE_ERROR" - ,"PARAM_ERROR" - ,"MEM_ERROR" - ,"DATA_ERROR" - ,"DATA_ERROR_MAGIC" - ,"IO_ERROR" - ,"UNEXPECTED_EOF" - ,"OUTBUFF_FULL" - ,"???" /* for future */ - ,"???" /* for future */ - ,"???" /* for future */ - ,"???" /* for future */ - ,"???" /* for future */ - ,"???" /* for future */ -}; - -void flip_bit ( int bit ) -{ - int byteno = bit / 8; - int bitno = bit % 8; - uchar mask = 1 << bitno; - //fprintf ( stderr, "(byte %d bit %d mask %d)", - // byteno, bitno, (int)mask ); - zbuf[byteno] ^= mask; -} - -int main ( int argc, char** argv ) -{ - FILE* f; - int r; - int bit; - int i; - - if (argc != 2) { - fprintf ( stderr, "usage: unzcrash filename\n" ); - return 1; - } - - f = fopen ( argv[1], "r" ); - if (!f) { - fprintf ( stderr, "unzcrash: can't open %s\n", argv[1] ); - return 1; - } - - nIn = fread ( inbuf, 1, M_BLOCK, f ); - fprintf ( stderr, "%d bytes read\n", nIn ); - - nZ = M_BLOCK; - r = BZ2_bzBuffToBuffCompress ( - zbuf, &nZ, inbuf, nIn, 9, 0, 30 ); - - assert (r == BZ_OK); - fprintf ( stderr, "%d after compression\n", nZ ); - - for (bit = 0; bit < nZ*8; bit++) { - fprintf ( stderr, "bit %d ", bit ); - flip_bit ( bit ); - nOut = M_BLOCK_OUT; - r = BZ2_bzBuffToBuffDecompress ( - outbuf, &nOut, zbuf, nZ, 0, 0 ); - fprintf ( stderr, " %d %s ", r, bzerrorstrings[-r] ); - - if (r != BZ_OK) { - fprintf ( stderr, "\n" ); - } else { - if (nOut != nIn) { - fprintf(stderr, "nIn/nOut mismatch %d %d\n", nIn, nOut ); - return 1; - } else { - for (i = 0; i < nOut; i++) - if (inbuf[i] != outbuf[i]) { - fprintf(stderr, "mismatch at %d\n", i ); - return 1; - } - if (i == nOut) fprintf(stderr, "really ok!\n" ); - } - } - - flip_bit ( bit ); - } - -#if 0 - assert (nOut == nIn); - for (i = 0; i < nOut; i++) { - if (inbuf[i] != outbuf[i]) { - fprintf ( stderr, "difference at %d !\n", i ); - return 1; - } - } -#endif - - fprintf ( stderr, "all ok\n" ); - return 0; -} |