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[libpng17] Eliminated the PNG_SAFE_LIMITS macro and set default limits in

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pnglibconf.dfa, that can be reset by the user at build time or run time.
This provides a more robust defense against DOS and as-yet undiscovered
overflows.
This commit is contained in:
Glenn Randers-Pehrson
2014-12-23 22:13:40 -06:00
parent 38d22ef928
commit eeab1cfefc
6 changed files with 38 additions and 61 deletions
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9
scripts/pnglibconf.h.prebuilt
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@@ -2,7 +2,7 @@
/* pnglibconf.h - library build configuration */
/* Libpng version 1.7.0beta45 - December 23, 2014 */
/* Libpng version 1.7.0beta45 - December 24, 2014 */
/* Copyright (c) 1998-2014 Glenn Randers-Pehrson */
@@ -97,7 +97,6 @@
#define PNG_READ_tIME_SUPPORTED
#define PNG_READ_tRNS_SUPPORTED
#define PNG_READ_zTXt_SUPPORTED
/*#undef PNG_SAFE_LIMITS_SUPPORTED*/
#define PNG_SAVE_INT_32_SUPPORTED
#define PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
#define PNG_SEQUENTIAL_READ_SUPPORTED
@@ -197,10 +196,14 @@
#define PNG_QUANTIZE_RED_BITS 5
#define PNG_TEXT_Z_DEFAULT_COMPRESSION (-1)
#define PNG_TEXT_Z_DEFAULT_STRATEGY 0
#define PNG_USER_CHUNK_CACHE_MAX 128 /* Use 0 for unlimited */
#define PNG_USER_CHUNK_MALLOC_MAX 8000000 /* Use 0 for unlimited */
#define PNG_USER_HEIGHT_MAX 640000 /* PNG max is 0x7fffffff */
#define PNG_USER_WIDTH_MAX 640000 /* PNG max is 0x7fffffff */
#define PNG_WEIGHT_SHIFT 8
#define PNG_ZLIB_VERNUM 0 /* unknown */
#define PNG_ZBUF_SIZE 8192
#define PNG_ZLIB_HEADER <zlib.h>
#define PNG_ZLIB_VERNUM 0 /* unknown */
#define PNG_Z_DEFAULT_COMPRESSION (-1)
#define PNG_Z_DEFAULT_NOFILTER_STRATEGY 0
#define PNG_Z_DEFAULT_STRATEGY 1