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/*====================================================================*
- Copyright (C) 2001 Leptonica. 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 THE COPYRIGHT HOLDERS AND 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 ANY
- 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.
*====================================================================*/
/*
* corrupttest.c
*
* Excises or permutes a given fraction of bytes, starting from
* a specified location. The parameters @loc and @size are fractions
* of the entire file (between 0.0 and 1.0).
*
* Syntax: corrupttest <file> <deletion> [loc size]
*
* where <deletion> == 1 means that bytes are deleted
* <deletion> == 0 means that random bytes are substituted
*
* Use: "fuzz testing" jpeg, png, tiff, bmp, webp and pnm reading,
* under corruption by either random byte substitution or
* deletion of part of the compressed file.
*
* For example,
* corrupttest rabi.png 0 0.0001 0.0001
* which tests read functions on rabi.png after 23 bytes (0.01%)
* starting at byte 23 have been randomly permuted, emits the following:
* > Info in fileCorruptByMutation: Randomizing 23 bytes at location 23
* > libpng error: IHDR: CRC error
* > Error in pixReadMemPng: internal png error
* > Error in pixReadStream: png: no pix returned
* > Error in pixRead: pix not read
* > libpng error: IHDR: CRC error
* > Error in fgetPngResolution: internal png error
*/
#ifdef HAVE_CONFIG_H
#include <config_auto.h>
#endif /* HAVE_CONFIG_H */
#include "string.h"
#include "allheaders.h"
static const char *corruptfile = "/tmp/lept/corrupt/badfile";
int main(int argc,
char **argv)
{
size_t filesize;
l_float32 loc, size;
l_float32 coeff1[15], coeff2[25];
l_int32 i, j, w, xres, yres, format, ret, nwarn, hint, deletion, show;
l_uint8 *comment, *filedata;
char *filein;
size_t nbytes;
FILE *fp;
PIX *pix;
if (argc != 3 && argc != 5)
return ERROR_INT("syntax: corrupttest filein deletion [loc size]",
__func__, 1);
filein = argv[1];
deletion = atoi(argv[2]);
findFileFormat(filein, &format);
nbytes = nbytesInFile(filein);
lept_stderr("file size: %lu bytes\n", (unsigned long)nbytes);
setLeptDebugOK(1);
lept_mkdir("lept/corrupt");
hint = 0;
if (argc == 5) { /* Single test */
loc = atof(argv[3]);
size = atof(argv[4]);
if (deletion == TRUE) {
fileCorruptByDeletion(filein, loc, size, corruptfile);
} else { /* mutation */
fileCorruptByMutation(filein, loc, size, corruptfile);
}
if ((fp = fopenReadStream(corruptfile)) == NULL)
return ERROR_INT_1("stream not opened", corruptfile, __func__, 1);
if (format == IFF_JFIF_JPEG) {
if ((pix = pixReadJpeg(corruptfile, 0, 1, &nwarn, hint)) != NULL) {
pixDisplay(pix, 100, 100);
pixDestroy(&pix);
}
freadHeaderJpeg(fp, &w, NULL, NULL, NULL, NULL);
fgetJpegResolution(fp, &xres, &yres);
ret = fgetJpegComment(fp, &comment);
if (!ret && comment) {
lept_stderr("comment: %s\n", comment);
lept_free(comment);
}
} else if (format == IFF_PNG) {
if ((pix = pixRead(corruptfile)) != NULL) {
pixDisplay(pix, 100, 100);
pixDestroy(&pix);
}
freadHeaderPng(fp, &w, NULL, NULL, NULL, NULL);
fgetPngResolution(fp, &xres, &yres);
} else if (format == IFF_WEBP) {
if ((pix = pixRead(corruptfile)) != NULL) {
pixDisplay(pix, 100, 100);
pixDestroy(&pix);
}
readHeaderWebP(corruptfile, &w, NULL, NULL);
} else if (format == IFF_PNM) {
if ((pix = pixRead(corruptfile)) != NULL) {
pixDisplay(pix, 100, 100);
pixDestroy(&pix);
}
freadHeaderPnm(fp, &w, NULL, NULL, NULL, NULL, NULL);
}
fclose(fp);
return 0;
}
/* Generate coefficients so that the size of the mangled
* or deleted data can range from 0.001% to 1% of the file,
* and the location of deleted data ranges from 0.001%
* to 90% of the file. */
for (i = 0; i < 15; i++) {
if (i < 5) coeff1[i] = 0.00001;
else if (i < 10) coeff1[i] = 0.0001;
else coeff1[i] = 0.001;
}
for (i = 0; i < 25; i++) {
if (i < 5) coeff2[i] = 0.00001;
else if (i < 10) coeff2[i] = 0.0001;
else if (i < 15) coeff2[i] = 0.001;
else if (i < 20) coeff2[i] = 0.01;
else coeff2[i] = 0.1;
}
/* Multiple test (argc == 3) */
show = TRUE;
for (i = 0; i < 25; i++) {
loc = coeff2[i] * (2 * (i % 5) + 1);
for (j = 0; j < 15; j++) {
size = coeff1[j] * (2 * (j % 5) + 1);
/* Write corrupt file */
if (deletion == TRUE) {
fileCorruptByDeletion(filein, loc, size, corruptfile);
} else {
fileCorruptByMutation(filein, loc, size, corruptfile);
}
/* Attempt to read the file */
pix = NULL;
if (format == IFF_JFIF_JPEG) {
/* The pix is usually returned as long as the header
* information is not damaged.
* We expect nwarn > 0 (typically 1) for nearly every
* corrupted image. In the situation where only a few
* bytes are removed, a corrupted image will occasionally
* have nwarn == 0 even though it's visually defective. */
pix = pixReadJpeg(corruptfile, 0, 1, &nwarn, 0);
if (pix && nwarn != 1 && deletion == TRUE) {
lept_stderr("nwarn[%d,%d] = %d\n", j, i, nwarn);
if (show) pixDisplay(pix, 20 * i, 30 * j);
show = FALSE;
}
} else if (format == IFF_PNG) {
pix = pixRead(corruptfile);
if (pix) {
lept_stderr("pix[%d,%d] is read\n", j, i);
if (show) pixDisplay(pix, 20 * i, 30 * j);
show = FALSE;
}
pixDestroy(&pix);
filedata = l_binaryRead(corruptfile, &filesize);
pix = pixReadMemPng(filedata, filesize);
lept_free(filedata);
} else if (L_FORMAT_IS_TIFF(format)) {
/* A corrupted pix is often returned, as long as the
* header is not damaged, so we do not display them. */
pix = pixRead(corruptfile);
if (pix) lept_stderr("pix[%d,%d] is read\n", j, i);
pixDestroy(&pix);
filedata = l_binaryRead(corruptfile, &filesize);
pix = pixReadMemTiff(filedata, filesize, 0);
if (!pix) lept_stderr("no pix!\n");
lept_free(filedata);
} else if (format == IFF_BMP) {
/* A corrupted pix is always returned if the header is
* not damaged, so we do not display them. */
pix = pixRead(corruptfile);
if (pix) lept_stderr("pix[%d,%d] is read\n", j, i);
pixDestroy(&pix);
filedata = l_binaryRead(corruptfile, &filesize);
pix = pixReadMemBmp(filedata, filesize);
lept_free(filedata);
} else if (format == IFF_WEBP) {
/* A corrupted pix is always returned if the header is
* not damaged, so we do not display them. */
pix = pixRead(corruptfile);
if (pix) lept_stderr("pix[%d,%d] is read\n", j, i);
pixDestroy(&pix);
filedata = l_binaryRead(corruptfile, &filesize);
pix = pixReadMemWebP(filedata, filesize);
lept_free(filedata);
} else if (format == IFF_PNM) {
/* A corrupted pix is always returned if the header is
* not damaged, so we do not display them. */
pix = pixRead(corruptfile);
if (pix) lept_stderr("pix[%d,%d] is read\n", j, i);
pixDestroy(&pix);
filedata = l_binaryRead(corruptfile, &filesize);
pix = pixReadMemPnm(filedata, filesize);
lept_free(filedata);
} else {
lept_stderr("Format %d unknown\n", format);
continue;
}
/* Effect of 1% byte mangling from interior of data stream */
if (pix && j == 14 && i == 10 && deletion == FALSE)
pixDisplay(pix, 0, 0);
pixDestroy(&pix);
/* Attempt to read the header and the resolution */
fp = fopenReadStream(corruptfile);
if (format == IFF_JFIF_JPEG) {
freadHeaderJpeg(fp, &w, NULL, NULL, NULL, NULL);
if (fgetJpegResolution(fp, &xres, &yres) == 0)
lept_stderr("w = %d, xres = %d, yres = %d\n",
w, xres, yres);
} else if (format == IFF_PNG) {
freadHeaderPng(fp, &w, NULL, NULL, NULL, NULL);
if (fgetPngResolution(fp, &xres, &yres) == 0)
lept_stderr("w = %d, xres = %d, yres = %d\n",
w, xres, yres);
} else if (L_FORMAT_IS_TIFF(format)) {
freadHeaderTiff(fp, 0, &w, NULL, NULL, NULL, NULL, NULL, NULL);
getTiffResolution(fp, &xres, &yres);
lept_stderr("w = %d, xres = %d, yres = %d\n",
w, xres, yres);
} else if (format == IFF_WEBP) {
if (readHeaderWebP(corruptfile, &w, NULL, NULL) == 0)
lept_stderr("w = %d\n", w);
} else if (format == IFF_PNM) {
if (freadHeaderPnm(fp, &w, NULL, NULL, NULL, NULL, NULL) == 0)
lept_stderr("w = %d\n", w);
}
fclose(fp);
}
}
return 0;
}
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