[libpng17] Changed bad CRC from 0x00000000 to 0xabadcc32 and bad ADLER32

from 0x00000000 to 0xabadad32 in badcrc.png and badadler.png, to make them recognizable in hex dumps.
2025-07-10 18:04:09 +02:00 · 2016-09-26 07:33:19 -05:00 · 2016-09-26 07:33:19 -05:00 · 517fe770e2
commit 517fe770e2
parent f911c1146a
4 changed files with 2 additions and 2 deletions
--- a/2
+++ b/2
@ -1405,7 +1405,7 @@ Version 1.7.0beta84 [September 26, 2016]
  Changed PNG_ZLIB_VERNUM to ZLIB_VERNUM in pngrutil.c.
  If CRC handling of critical chunks has been set to PNG_CRC_QUIET_USE,
    ignore the ADLER32 checksum in the IDAT chunk as well as the chunk CRCs.
-  Warn about ADLER32 checksum mismatch instead of issuing a png_error().
+  Issue png_benign_error() on ADLER32 checksum mismatch instead of png_error().
  Add tests/badcrc.png and tests/badadler.png to tests/pngtest.

 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
--- a/2
+++ b/2
@ -5705,7 +5705,7 @@ Version 1.7.0beta84 [September 26, 2016]
  Changed PNG_ZLIB_VERNUM to ZLIB_VERNUM in pngrutil.c.
  If CRC handling of critical chunks has been set to PNG_CRC_QUIET_USE,
    ignore the ADLER32 checksum in the IDAT chunk as well as the chunk CRCs.
-  Warn about ADLER32 checksum mismatch instead of issuing a png_error().
+  Issue png_benign_error() on ADLER32 checksum mismatch instead of png_error().
  Add tests/badcrc.png and tests/badadler.png to tests/pngtest.

 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
--- a/tests/badadler.png
+++ b/tests/badadler.png
--- a/tests/badcrc.png
+++ b/tests/badcrc.png