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-rw-r--r--src/Attrib.c7
-rw-r--r--src/CrDatFrI.c2
-rw-r--r--src/WrFFrI.c2
-rw-r--r--src/XpmI.h18
-rw-r--r--src/create.c15
-rw-r--r--src/data.c2
-rw-r--r--src/hashtab.c6
-rw-r--r--src/parse.c67
-rw-r--r--src/scan.c18
9 files changed, 113 insertions, 24 deletions
diff --git a/src/Attrib.c b/src/Attrib.c
index 04b843b..cf7081c 100644
--- a/src/Attrib.c
+++ b/src/Attrib.c
@@ -35,7 +35,7 @@
#include "XpmI.h"
/* 3.2 backward compatibility code */
-LFUNC(CreateOldColorTable, int, (XpmColor *ct, int ncolors,
+LFUNC(CreateOldColorTable, int, (XpmColor *ct, unsigned int ncolors,
XpmColor ***oldct));
LFUNC(FreeOldColorTable, void, (XpmColor **colorTable, int ncolors));
@@ -46,12 +46,15 @@ LFUNC(FreeOldColorTable, void, (XpmColor **colorTable, int ncolors));
static int
CreateOldColorTable(ct, ncolors, oldct)
XpmColor *ct;
- int ncolors;
+ unsigned int ncolors;
XpmColor ***oldct;
{
XpmColor **colorTable, **color;
int a;
+ if (ncolors >= SIZE_MAX / sizeof(XpmColor *))
+ return XpmNoMemory;
+
colorTable = (XpmColor **) XpmMalloc(ncolors * sizeof(XpmColor *));
if (!colorTable) {
*oldct = NULL;
diff --git a/src/CrDatFrI.c b/src/CrDatFrI.c
index 55f8b06..8bec109 100644
--- a/src/CrDatFrI.c
+++ b/src/CrDatFrI.c
@@ -124,6 +124,8 @@ XpmCreateDataFromXpmImage(data_return, image, info)
*/
header_nlines = 1 + image->ncolors;
header_size = sizeof(char *) * header_nlines;
+ if (header_size >= SIZE_MAX / sizeof(char *))
+ return (XpmNoMemory);
header = (char **) XpmCalloc(header_size, sizeof(char *));
if (!header)
return (XpmNoMemory);
diff --git a/src/WrFFrI.c b/src/WrFFrI.c
index 41b4c0d..5ef5814 100644
--- a/src/WrFFrI.c
+++ b/src/WrFFrI.c
@@ -248,6 +248,8 @@ WritePixels(file, width, height, cpp, pixels, colors)
unsigned int x, y, h;
h = height - 1;
+ if (cpp != 0 && width >= (SIZE_MAX - 3)/cpp)
+ return XpmNoMemory;
p = buf = (char *) XpmMalloc(width * cpp + 3);
if (!buf)
return (XpmNoMemory);
diff --git a/src/XpmI.h b/src/XpmI.h
index 91f6cd9..5c5b900 100644
--- a/src/XpmI.h
+++ b/src/XpmI.h
@@ -86,6 +86,18 @@ extern FILE *popen();
boundCheckingCalloc((long)(nelem),(long) (elsize))
#endif
+#if defined(SCO) || defined(__USLC__)
+#include <stdint.h> /* For SIZE_MAX */
+#endif
+#include <limits.h>
+#ifndef SIZE_MAX
+# ifdef ULONG_MAX
+# define SIZE_MAX ULONG_MAX
+# else
+# define SIZE_MAX UINT_MAX
+# endif
+#endif
+
#define XPMMAXCMTLEN BUFSIZ
typedef struct {
unsigned int type;
@@ -187,9 +199,9 @@ typedef struct _xpmHashAtom {
} *xpmHashAtom;
typedef struct {
- int size;
- int limit;
- int used;
+ unsigned int size;
+ unsigned int limit;
+ unsigned int used;
xpmHashAtom *atomTable;
} xpmHashTable;
diff --git a/src/create.c b/src/create.c
index 790e23e..aa0f140 100644
--- a/src/create.c
+++ b/src/create.c
@@ -1,3 +1,4 @@
+/* $XdotOrg$ */
/*
* Copyright (C) 1989-95 GROUPE BULL
*
@@ -816,6 +817,9 @@ XpmCreateImageFromXpmImage(display, image,
ErrorStatus = XpmSuccess;
+ if (image->ncolors >= SIZE_MAX / sizeof(Pixel))
+ return (XpmNoMemory);
+
/* malloc pixels index tables */
image_pixels = (Pixel *) XpmMalloc(sizeof(Pixel) * image->ncolors);
if (!image_pixels)
@@ -988,6 +992,8 @@ CreateXImage(display, visual, depth, format, width, height, image_return)
return (XpmNoMemory);
#if !defined(FOR_MSW) && !defined(AMIGA)
+ if (height != 0 && (*image_return)->bytes_per_line >= SIZE_MAX / height)
+ return XpmNoMemory;
/* now that bytes_per_line must have been set properly alloc data */
(*image_return)->data =
(char *) XpmMalloc((*image_return)->bytes_per_line * height);
@@ -2055,6 +2061,9 @@ xpmParseDataAndCreate(display, data, image_return, shapeimage_return,
xpmGetCmt(data, &colors_cmt);
/* malloc pixels index tables */
+ if (ncolors >= SIZE_MAX / sizeof(Pixel))
+ return XpmNoMemory;
+
image_pixels = (Pixel *) XpmMalloc(sizeof(Pixel) * ncolors);
if (!image_pixels)
RETURN(XpmNoMemory);
@@ -2309,7 +2318,8 @@ ParseAndPutPixels(
}
obm = SelectObject(*dc, image->bitmap);
#endif
-
+ if (ncolors > 256)
+ return (XpmFileInvalid);
bzero((char *)colidx, 256 * sizeof(short));
for (a = 0; a < ncolors; a++)
@@ -2415,6 +2425,9 @@ if (cidx[f]) XpmFree(cidx[f]);}
char *s;
char buf[BUFSIZ];
+ if (cpp >= sizeof(buf))
+ return (XpmFileInvalid);
+
buf[cpp] = '\0';
if (USE_HASHTABLE) {
xpmHashAtom *slot;
diff --git a/src/data.c b/src/data.c
index 8f4dc69..ccd98ed 100644
--- a/src/data.c
+++ b/src/data.c
@@ -375,7 +375,7 @@ xpmGetCmt(data, cmt)
{
if (!data->type)
*cmt = NULL;
- else if (data->CommentLength) {
+ else if (data->CommentLength != 0 && data->CommentLength < SIZE_MAX - 1) {
*cmt = (char *) XpmMalloc(data->CommentLength + 1);
strncpy(*cmt, data->Comment, data->CommentLength);
(*cmt)[data->CommentLength] = '\0';
diff --git a/src/hashtab.c b/src/hashtab.c
index 7d596ec..f07cb6d 100644
--- a/src/hashtab.c
+++ b/src/hashtab.c
@@ -135,7 +135,7 @@ HashTableGrows(table)
xpmHashTable *table;
{
xpmHashAtom *atomTable = table->atomTable;
- int size = table->size;
+ unsigned int size = table->size;
xpmHashAtom *t, *p;
int i;
int oldSize = size;
@@ -144,6 +144,8 @@ HashTableGrows(table)
HASH_TABLE_GROWS
table->size = size;
table->limit = size / 3;
+ if (size >= SIZE_MAX / sizeof(*atomTable))
+ return (XpmNoMemory);
atomTable = (xpmHashAtom *) XpmMalloc(size * sizeof(*atomTable));
if (!atomTable)
return (XpmNoMemory);
@@ -204,6 +206,8 @@ xpmHashTableInit(table)
table->size = INITIAL_HASH_SIZE;
table->limit = table->size / 3;
table->used = 0;
+ if (table->size >= SIZE_MAX / sizeof(*atomTable))
+ return (XpmNoMemory);
atomTable = (xpmHashAtom *) XpmMalloc(table->size * sizeof(*atomTable));
if (!atomTable)
return (XpmNoMemory);
diff --git a/src/parse.c b/src/parse.c
index 3c819a2..2dae237 100644
--- a/src/parse.c
+++ b/src/parse.c
@@ -1,3 +1,4 @@
+/* $XdotOrg$ */
/*
* Copyright (C) 1989-95 GROUPE BULL
*
@@ -44,6 +45,24 @@
#include <ctype.h>
#include <string.h>
+#ifdef HAS_STRLCAT
+# define STRLCAT(dst, src, dstsize) { \
+ if (strlcat(dst, src, dstsize) >= (dstsize)) \
+ return (XpmFileInvalid); }
+# define STRLCPY(dst, src, dstsize) { \
+ if (strlcpy(dst, src, dstsize) >= (dstsize)) \
+ return (XpmFileInvalid); }
+#else
+# define STRLCAT(dst, src, dstsize) { \
+ if ((strlen(dst) + strlen(src)) < (dstsize)) \
+ strcat(dst, src); \
+ else return (XpmFileInvalid); }
+# define STRLCPY(dst, src, dstsize) { \
+ if (strlen(src) < (dstsize)) \
+ strcpy(dst, src); \
+ else return (XpmFileInvalid); }
+#endif
+
LFUNC(ParsePixels, int, (xpmData *data, unsigned int width,
unsigned int height, unsigned int ncolors,
unsigned int cpp, XpmColor *colorTable,
@@ -66,7 +85,7 @@ xpmParseValues(data, width, height, ncolors, cpp,
unsigned int *extensions;
{
unsigned int l;
- char buf[BUFSIZ];
+ char buf[BUFSIZ + 1];
if (!data->format) { /* XPM 2 or 3 */
@@ -175,10 +194,10 @@ xpmParseColors(data, ncolors, cpp, colorTablePtr, hashtable)
XpmColor **colorTablePtr;
xpmHashTable *hashtable;
{
- unsigned int key = 0, l, a, b;
+ unsigned int key = 0, l, a, b, len;
unsigned int curkey; /* current color key */
unsigned int lastwaskey; /* key read */
- char buf[BUFSIZ];
+ char buf[BUFSIZ+1];
char curbuf[BUFSIZ]; /* current buffer */
char **sptr, *s;
XpmColor *color;
@@ -186,6 +205,8 @@ xpmParseColors(data, ncolors, cpp, colorTablePtr, hashtable)
char **defaults;
int ErrorStatus;
+ if (ncolors >= SIZE_MAX / sizeof(XpmColor))
+ return (XpmNoMemory);
colorTable = (XpmColor *) XpmCalloc(ncolors, sizeof(XpmColor));
if (!colorTable)
return (XpmNoMemory);
@@ -197,6 +218,10 @@ xpmParseColors(data, ncolors, cpp, colorTablePtr, hashtable)
/*
* read pixel value
*/
+ if (cpp >= SIZE_MAX - 1) {
+ xpmFreeColorTable(colorTable, ncolors);
+ return (XpmNoMemory);
+ }
color->string = (char *) XpmMalloc(cpp + 1);
if (!color->string) {
xpmFreeColorTable(colorTable, ncolors);
@@ -234,13 +259,14 @@ xpmParseColors(data, ncolors, cpp, colorTablePtr, hashtable)
}
if (!lastwaskey && key < NKEYS) { /* open new key */
if (curkey) { /* flush string */
- s = (char *) XpmMalloc(strlen(curbuf) + 1);
+ len = strlen(curbuf) + 1;
+ s = (char *) XpmMalloc(len);
if (!s) {
xpmFreeColorTable(colorTable, ncolors);
return (XpmNoMemory);
}
defaults[curkey] = s;
- strcpy(s, curbuf);
+ memcpy(s, curbuf, len);
}
curkey = key + 1; /* set new key */
*curbuf = '\0'; /* reset curbuf */
@@ -251,9 +277,9 @@ xpmParseColors(data, ncolors, cpp, colorTablePtr, hashtable)
return (XpmFileInvalid);
}
if (!lastwaskey)
- strcat(curbuf, " "); /* append space */
+ STRLCAT(curbuf, " ", sizeof(curbuf)); /* append space */
buf[l] = '\0';
- strcat(curbuf, buf);/* append buf */
+ STRLCAT(curbuf, buf, sizeof(curbuf));/* append buf */
lastwaskey = 0;
}
}
@@ -261,12 +287,13 @@ xpmParseColors(data, ncolors, cpp, colorTablePtr, hashtable)
xpmFreeColorTable(colorTable, ncolors);
return (XpmFileInvalid);
}
- s = defaults[curkey] = (char *) XpmMalloc(strlen(curbuf) + 1);
+ len = strlen(curbuf) + 1;
+ s = defaults[curkey] = (char *) XpmMalloc(len);
if (!s) {
xpmFreeColorTable(colorTable, ncolors);
return (XpmNoMemory);
}
- strcpy(s, curbuf);
+ memcpy(s, curbuf, len);
}
} else { /* XPM 1 */
/* get to the beginning of the first string */
@@ -279,6 +306,10 @@ xpmParseColors(data, ncolors, cpp, colorTablePtr, hashtable)
/*
* read pixel value
*/
+ if (cpp >= SIZE_MAX - 1) {
+ xpmFreeColorTable(colorTable, ncolors);
+ return (XpmNoMemory);
+ }
color->string = (char *) XpmMalloc(cpp + 1);
if (!color->string) {
xpmFreeColorTable(colorTable, ncolors);
@@ -307,16 +338,17 @@ xpmParseColors(data, ncolors, cpp, colorTablePtr, hashtable)
*curbuf = '\0'; /* init curbuf */
while ((l = xpmNextWord(data, buf, BUFSIZ))) {
if (*curbuf != '\0')
- strcat(curbuf, " ");/* append space */
+ STRLCAT(curbuf, " ", sizeof(curbuf));/* append space */
buf[l] = '\0';
- strcat(curbuf, buf); /* append buf */
+ STRLCAT(curbuf, buf, sizeof(curbuf)); /* append buf */
}
- s = (char *) XpmMalloc(strlen(curbuf) + 1);
+ len = strlen(curbuf) + 1;
+ s = (char *) XpmMalloc(len);
if (!s) {
xpmFreeColorTable(colorTable, ncolors);
return (XpmNoMemory);
}
- strcpy(s, curbuf);
+ memcpy(s, curbuf, len);
color->c_color = s;
*curbuf = '\0'; /* reset curbuf */
if (a < ncolors - 1)
@@ -341,6 +373,9 @@ ParsePixels(data, width, height, ncolors, cpp, colorTable, hashtable, pixels)
unsigned int *iptr, *iptr2;
unsigned int a, x, y;
+ if ((height > 0 && width >= SIZE_MAX / height) ||
+ width * height >= SIZE_MAX / sizeof(unsigned int))
+ return XpmNoMemory;
#ifndef FOR_MSW
iptr2 = (unsigned int *) XpmMalloc(sizeof(unsigned int) * width * height);
#else
@@ -364,6 +399,9 @@ ParsePixels(data, width, height, ncolors, cpp, colorTable, hashtable, pixels)
{
unsigned short colidx[256];
+ if (ncolors > 256)
+ return (XpmFileInvalid);
+
bzero((char *)colidx, 256 * sizeof(short));
for (a = 0; a < ncolors; a++)
colidx[(unsigned char)colorTable[a].string[0]] = a + 1;
@@ -442,6 +480,9 @@ if (cidx[f]) XpmFree(cidx[f]);}
char *s;
char buf[BUFSIZ];
+ if (cpp >= sizeof(buf))
+ return (XpmFileInvalid);
+
buf[cpp] = '\0';
if (USE_HASHTABLE) {
xpmHashAtom *slot;
diff --git a/src/scan.c b/src/scan.c
index 4142e7f..230c7e6 100644
--- a/src/scan.c
+++ b/src/scan.c
@@ -107,7 +107,8 @@ LFUNC(MSWGetImagePixels, int, (Display *d, XImage *image, unsigned int width,
LFUNC(ScanTransparentColor, int, (XpmColor *color, unsigned int cpp,
XpmAttributes *attributes));
-LFUNC(ScanOtherColors, int, (Display *display, XpmColor *colors, int ncolors,
+LFUNC(ScanOtherColors, int, (Display *display, XpmColor *colors,
+ unsigned int ncolors,
Pixel *pixels, unsigned int mask,
unsigned int cpp, XpmAttributes *attributes));
@@ -232,11 +233,17 @@ XpmCreateXpmImageFromImage(display, image, shapeimage,
else
cpp = 0;
+ if ((height > 0 && width >= SIZE_MAX / height) ||
+ width * height >= SIZE_MAX / sizeof(unsigned int))
+ RETURN(XpmNoMemory);
pmap.pixelindex =
(unsigned int *) XpmCalloc(width * height, sizeof(unsigned int));
if (!pmap.pixelindex)
RETURN(XpmNoMemory);
+ if (pmap.size >= SIZE_MAX / sizeof(Pixel))
+ RETURN(XpmNoMemory);
+
pmap.pixels = (Pixel *) XpmMalloc(sizeof(Pixel) * pmap.size);
if (!pmap.pixels)
RETURN(XpmNoMemory);
@@ -301,7 +308,8 @@ XpmCreateXpmImageFromImage(display, image, shapeimage,
* get rgb values and a string of char, and possibly a name for each
* color
*/
-
+ if (pmap.ncolors >= SIZE_MAX / sizeof(XpmColor))
+ RETURN(XpmNoMemory);
colorTable = (XpmColor *) XpmCalloc(pmap.ncolors, sizeof(XpmColor));
if (!colorTable)
RETURN(XpmNoMemory);
@@ -360,6 +368,8 @@ ScanTransparentColor(color, cpp, attributes)
/* first get a character string */
a = 0;
+ if (cpp >= SIZE_MAX - 1)
+ return (XpmNoMemory);
if (!(s = color->string = (char *) XpmMalloc(cpp + 1)))
return (XpmNoMemory);
*s++ = printable[c = a % MAXPRINTABLE];
@@ -407,7 +417,7 @@ static int
ScanOtherColors(display, colors, ncolors, pixels, mask, cpp, attributes)
Display *display;
XpmColor *colors;
- int ncolors;
+ unsigned int ncolors;
Pixel *pixels;
unsigned int mask;
unsigned int cpp;
@@ -451,6 +461,8 @@ ScanOtherColors(display, colors, ncolors, pixels, mask, cpp, attributes)
}
/* first get character strings and rgb values */
+ if (ncolors >= SIZE_MAX / sizeof(XColor) || cpp >= SIZE_MAX - 1)
+ return (XpmNoMemory);
xcolors = (XColor *) XpmMalloc(sizeof(XColor) * ncolors);
if (!xcolors)
return (XpmNoMemory);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 18:09:17 +0000