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[cff] Emit better error code for invalid private dict size. 

* src/cff/cffparse.c (cff_parse_private_dict): Reject negative
values for size and offset.
This commit is contained in:
Werner Lemberg 2015-02-19 14:11:16 +01:00
parent b57bb11ad0
commit 93a884c6cd
2 changed files with 29 additions and 2 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2015-02-19 Werner Lemberg <wl@gnu.org>
[cff] Emit better error code for invalid private dict size.
* src/cff/cffparse.c (cff_parse_private_dict): Reject negative
values for size and offset.
2015-02-19 Werner Lemberg <wl@gnu.org> 2015-02-19 Werner Lemberg <wl@gnu.org>
[autofit] Fix signedness issues. [autofit] Fix signedness issues.

24
src/cff/cffparse.c
View File

@ -617,14 +617,34 @@
if ( parser->top >= parser->stack + 2 ) if ( parser->top >= parser->stack + 2 )
{ {
dict->private_size = cff_parse_num( data++ ); FT_Long tmp;
dict->private_offset = cff_parse_num( data );
tmp = cff_parse_num( data++ );
if ( tmp < 0 )
{
FT_ERROR(( "cff_parse_private_dict: Invalid dictionary size\n" ));
error = FT_THROW( Invalid_File_Format );
goto Fail;
}
dict->private_size = (FT_ULong)tmp;
tmp = cff_parse_num( data );
if ( tmp < 0 )
{
FT_ERROR(( "cff_parse_private_dict: Invalid dictionary offset\n" ));
error = FT_THROW( Invalid_File_Format );
goto Fail;
}
dict->private_offset = (FT_ULong)tmp;
FT_TRACE4(( " %lu %lu\n", FT_TRACE4(( " %lu %lu\n",
dict->private_size, dict->private_offset )); dict->private_size, dict->private_offset ));
error = FT_Err_Ok; error = FT_Err_Ok;
} }
Fail:
return error; return error;
} }