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* src/winfonts/winfnt.c (fnt_face_get_dll_font): Do a rough check of 

`font_count'.


* src/type1/t1load.c (parse_font_matrix): Check `temp_scale'.


* src/cff/cffgload.c (cff_decoder_prepare): Change return type to
`FT_Error'.
Check `fd_index'.
(cff_slot_load): Updated.
* src/cff/cffgload.h: Updated.
This commit is contained in:
Werner Lemberg 2007-06-06 10:05:49 +00:00
parent a8d65494cb
commit 470210b73c
5 changed files with 98 additions and 49 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
ChangeLog
View File

@ -6,6 +6,20 @@
* src/pfr/pfrcmap.c (pfr_cmap_init): Convert assertion into normal
FreeType error.
* src/winfonts/winfnt.c (fnt_face_get_dll_font): Do a rough check of
`font_count'.
* src/type1/t1load.c (parse_font_matrix): Check `temp_scale'.
* src/cff/cffgload.c (cff_decoder_prepare): Change return type to
`FT_Error'.
Check `fd_index'.
(cff_slot_load): Updated.
* src/cff/cffgload.h: Updated.
2007-06-05 Werner Lemberg <wl@gnu.org>
* src/pfr/pfrgload.c (pfr_glyph_done): Comment out unused code.
@ -18,7 +32,7 @@
* src/pfr/pfrtypes.h (PFR_GlyphRec): Comment out unused code.
* src/winfnt/winfnt.c (FNT_Face_Init): Check `family_size'.
* src/winfonts/winfnt.c (FNT_Face_Init): Check `family_size'.
* src/psaux/psobjs.c (ps_tocoordarray, ps_tofixedarray): Return -1

111
src/cff/cffgload.c
View File

@ -372,12 +372,13 @@
/* this function is used to select the locals subrs array */
FT_LOCAL_DEF( void )
FT_LOCAL_DEF( FT_Error )
cff_decoder_prepare( CFF_Decoder* decoder,
FT_UInt glyph_index )
{
CFF_Font cff = (CFF_Font)decoder->builder.face->extra.data;
CFF_SubFont sub = &cff->top_font;
CFF_Font cff = (CFF_Font)decoder->builder.face->extra.data;
CFF_SubFont sub = &cff->top_font;
FT_Error error = CFF_Err_Ok;
/* manage CID fonts */
@ -386,6 +387,13 @@
FT_Byte fd_index = cff_fd_select_get( &cff->fd_select, glyph_index );
if ( fd_index > CFF_MAX_CID_FONTS )
{
FT_TRACE4(( "cff_decoder_prepare: invalid CID subfont index\n" ));
error = CFF_Err_Invalid_File_Format;
goto Exit;
}
sub = cff->subfonts[fd_index];
}
@ -395,6 +403,9 @@
decoder->glyph_width = sub->private_dict.default_width;
decoder->nominal_width = sub->private_dict.nominal_width;
Exit:
return error;
}
@ -2249,9 +2260,11 @@
&charstring, &charstring_len );
if ( !error )
{
cff_decoder_prepare( &decoder, glyph_index );
error = cff_decoder_parse_charstrings( &decoder,
charstring, charstring_len );
error = cff_decoder_prepare( &decoder, glyph_index );
if ( !error )
error = cff_decoder_parse_charstrings( &decoder,
charstring,
charstring_len );
cff_free_glyph_data( face, &charstring, &charstring_len );
}
@ -2400,36 +2413,40 @@
&charstring, &charstring_len );
if ( !error )
{
cff_decoder_prepare( &decoder, glyph_index );
error = cff_decoder_parse_charstrings( &decoder,
charstring, charstring_len );
error = cff_decoder_prepare( &decoder, glyph_index );
if ( !error )
{
error = cff_decoder_parse_charstrings( &decoder,
charstring,
charstring_len );
cff_free_glyph_data( face, &charstring, charstring_len );
cff_free_glyph_data( face, &charstring, charstring_len );
#ifdef FT_CONFIG_OPTION_INCREMENTAL
/* Control data and length may not be available for incremental */
/* fonts. */
if ( face->root.internal->incremental_interface )
{
glyph->root.control_data = 0;
glyph->root.control_len = 0;
}
else
/* Control data and length may not be available for incremental */
/* fonts. */
if ( face->root.internal->incremental_interface )
{
glyph->root.control_data = 0;
glyph->root.control_len = 0;
}
else
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
/* We set control_data and control_len if charstrings is loaded. */
/* See how charstring loads at cff_index_access_element() in */
/* cffload.c. */
{
CFF_Index csindex = &cff->charstrings_index;
if ( csindex->offsets )
/* We set control_data and control_len if charstrings is loaded. */
/* See how charstring loads at cff_index_access_element() in */
/* cffload.c. */
{
glyph->root.control_data = csindex->bytes +
csindex->offsets[glyph_index] - 1;
glyph->root.control_len = charstring_len;
CFF_Index csindex = &cff->charstrings_index;
if ( csindex->offsets )
{
glyph->root.control_data = csindex->bytes +
csindex->offsets[glyph_index] - 1;
glyph->root.control_len = charstring_len;
}
}
}
}
@ -2462,25 +2479,27 @@
#endif /* FT_CONFIG_OPTION_INCREMENTAL */
if ( cff->num_subfonts >= 1 )
{
FT_Byte fd_index = cff_fd_select_get( &cff->fd_select, glyph_index );
font_matrix = cff->subfonts[fd_index]->font_dict.font_matrix;
font_offset = cff->subfonts[fd_index]->font_dict.font_offset;
}
else
{
font_matrix = cff->top_font.font_dict.font_matrix;
font_offset = cff->top_font.font_dict.font_offset;
}
/* Now, set the metrics -- this is rather simple, as */
/* the left side bearing is the xMin, and the top side */
/* bearing the yMax. */
if ( !error )
{
if ( cff->num_subfonts >= 1 )
{
FT_Byte fd_index = cff_fd_select_get( &cff->fd_select,
glyph_index );
font_matrix = cff->subfonts[fd_index]->font_dict.font_matrix;
font_offset = cff->subfonts[fd_index]->font_dict.font_offset;
}
else
{
font_matrix = cff->top_font.font_dict.font_matrix;
font_offset = cff->top_font.font_dict.font_offset;
}
/* Now, set the metrics -- this is rather simple, as */
/* the left side bearing is the xMin, and the top side */
/* bearing the yMax. */
/* For composite glyphs, return only left side bearing and */
/* advance width. */
if ( load_flags & FT_LOAD_NO_RECURSE )

4
src/cff/cffgload.h
View File

@ -4,7 +4,7 @@
/* */
/* OpenType Glyph Loader (specification). */
/* */
/* Copyright 1996-2001, 2002, 2003, 2004, 2006 by */
/* Copyright 1996-2001, 2002, 2003, 2004, 2006, 2007 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@ -175,7 +175,7 @@ FT_BEGIN_HEADER
FT_Bool hinting,
FT_Render_Mode hint_mode );
FT_LOCAL( void )
FT_LOCAL( FT_Error )
cff_decoder_prepare( CFF_Decoder* decoder,
FT_UInt glyph_index );

7
src/type1/t1load.c
View File

@ -1079,6 +1079,13 @@
temp_scale = FT_ABS( temp[3] );
if ( temp_scale == 0 )
{
FT_ERROR(( "parse_font_matrix: invalid font matrix\n" ));
parser->root.error = T1_Err_Invalid_File_Format;
return;
}
/* Set Units per EM based on FontMatrix values. We set the value to */
/* 1000 / temp_scale, because temp_scale was already multiplied by */
/* 1000 (in t1_tofixed, from psobjs.c). */

9
src/winfonts/winfnt.c
View File

@ -267,6 +267,15 @@
goto Exit;
}
/* loading `winfnt_header_fields' needs at least 118 bytes; */
/* use this as a rough measure to check the expected font size */
if ( font_count * 118UL > stream->size )
{
FT_TRACE2(( "invalid number of faces\n" ));
error = FNT_Err_Invalid_File_Format;
goto Exit;
}
face->root.num_faces = font_count;
if ( face_index >= font_count )