Beispiel #1
0
  static void
  gxv_kern_subtable_fmt2_validate( FT_Bytes       table,
                                   FT_Bytes       limit,
                                   GXV_Validator  gxvalid )
  {
    GXV_ODTECT( 3, odtect );
    GXV_kern_subtable_fmt2_DataRec  fmt2_rec =
      { 0, 0, { 0, 0 }, { 0, 0 }, { "leftClass", "rightClass" }, NULL };

    FT_Bytes   p = table + GXV_KERN_SUBTABLE_HEADER_SIZE;
    FT_UShort  leftOffsetTable;
    FT_UShort  rightOffsetTable;


    GXV_NAME_ENTER( "kern subtable format 2" );

    GXV_ODTECT_INIT( odtect );
    fmt2_rec.odtect = odtect;
    GXV_KERN_DATA( subtable_data ) = &fmt2_rec;

    GXV_LIMIT_CHECK( 2 + 2 + 2 + 2 );
    GXV_KERN_FMT2_DATA( rowWidth ) = FT_NEXT_USHORT( p );
    leftOffsetTable                = FT_NEXT_USHORT( p );
    rightOffsetTable               = FT_NEXT_USHORT( p );
    GXV_KERN_FMT2_DATA( array )    = FT_NEXT_USHORT( p );

    GXV_TRACE(( "rowWidth = %d\n", GXV_KERN_FMT2_DATA( rowWidth ) ));


    GXV_LIMIT_CHECK( leftOffsetTable );
    GXV_LIMIT_CHECK( rightOffsetTable );
    GXV_LIMIT_CHECK( GXV_KERN_FMT2_DATA( array ) );

    gxv_kern_subtable_fmt2_clstbl_validate( table + leftOffsetTable, limit,
                                            GXV_KERN_CLS_L, gxvalid );

    gxv_kern_subtable_fmt2_clstbl_validate( table + rightOffsetTable, limit,
                                            GXV_KERN_CLS_R, gxvalid );

    if ( GXV_KERN_FMT2_DATA( offset_min[GXV_KERN_CLS_L] ) +
           GXV_KERN_FMT2_DATA( offset_min[GXV_KERN_CLS_R] )
         < GXV_KERN_FMT2_DATA( array )                      )
      FT_INVALID_OFFSET;

    gxv_odtect_add_range( table + GXV_KERN_FMT2_DATA( array ),
                          GXV_KERN_FMT2_DATA( offset_max[GXV_KERN_CLS_L] )
                            + GXV_KERN_FMT2_DATA( offset_max[GXV_KERN_CLS_R] )
                            - GXV_KERN_FMT2_DATA( array ),
                          "array", odtect );

    gxv_odtect_validate( odtect, gxvalid );

    GXV_EXIT;
  }
Beispiel #2
0
  static void
  gxv_trak_trackData_validate( FT_Bytes       table,
                               FT_Bytes       limit,
                               GXV_Validator  gxvalid )
  {
    FT_Bytes   p = table;
    FT_UShort  nTracks;
    FT_UShort  nSizes;
    FT_ULong   sizeTableOffset;

    GXV_ODTECT( 4, odtect );


    GXV_ODTECT_INIT( odtect );
    GXV_NAME_ENTER( "trackData" );

    /* read the header of trackData */
    GXV_LIMIT_CHECK( 2 + 2 + 4 );
    nTracks         = FT_NEXT_USHORT( p );
    nSizes          = FT_NEXT_USHORT( p );
    sizeTableOffset = FT_NEXT_ULONG( p );

    gxv_odtect_add_range( table, (FT_ULong)( p - table ),
                          "trackData header", odtect );

    /* validate trackTable */
    gxv_trak_trackTable_validate( p, limit, nTracks, gxvalid );
    gxv_odtect_add_range( p, gxvalid->subtable_length,
                          "trackTable", odtect );

    /* sizeTable is array of FT_Fixed, don't check contents */
    p = gxvalid->root->base + sizeTableOffset;
    GXV_LIMIT_CHECK( nSizes * 4 );
    gxv_odtect_add_range( p, nSizes * 4, "sizeTable", odtect );

    /* validate trackValueOffet */
    p = gxvalid->root->base + GXV_TRAK_DATA( trackValueOffset_min );
    if ( limit - p < nTracks * nSizes * 2 )
      GXV_TRACE(( "too short trackValue array\n" ));

    p = gxvalid->root->base + GXV_TRAK_DATA( trackValueOffset_max );
    GXV_LIMIT_CHECK( nSizes * 2 );

    gxv_odtect_add_range( gxvalid->root->base
                            + GXV_TRAK_DATA( trackValueOffset_min ),
                          GXV_TRAK_DATA( trackValueOffset_max )
                            - GXV_TRAK_DATA( trackValueOffset_min )
                            + nSizes * 2,
                          "trackValue array", odtect );

    gxv_odtect_validate( odtect, gxvalid );

    GXV_EXIT;
  }
Beispiel #3
0
  gxv_just_validate( FT_Bytes      table,
                     FT_Face       face,
                     FT_Validator  ftvalid )
  {
    FT_Bytes           p     = table;
    FT_Bytes           limit = 0;
    FT_UInt            table_size;

    GXV_ValidatorRec   validrec;
    GXV_Validator      valid = &validrec;
    GXV_just_DataRec   justrec;
    GXV_just_Data      just = &justrec;

    FT_ULong           version;
    FT_UShort          format;
    FT_UShort          horizOffset;
    FT_UShort          vertOffset;

    GXV_ODTECT( 3, odtect );


    GXV_ODTECT_INIT( odtect );

    valid->root       = ftvalid;
    valid->table_data = just;
    valid->face       = face;

    FT_TRACE3(( "validating `just' table\n" ));
    GXV_INIT;

    limit      = valid->root->limit;
    table_size = limit - table;

    GXV_LIMIT_CHECK( 4 + 2 + 2 + 2 );
    version     = FT_NEXT_ULONG( p );
    format      = FT_NEXT_USHORT( p );
    horizOffset = FT_NEXT_USHORT( p );
    vertOffset  = FT_NEXT_USHORT( p );
    gxv_odtect_add_range( table, p - table, "just header", odtect );


    /* Version 1.0 (always:2000) */
    GXV_TRACE(( " (version = 0x%08x)\n", version ));
    if ( version != 0x00010000UL )
      FT_INVALID_FORMAT;

    /* format 0 (always:2000) */
    GXV_TRACE(( " (format = 0x%04x)\n", format ));
    if ( format != 0x0000 )
        FT_INVALID_FORMAT;

    GXV_TRACE(( " (horizOffset = %d)\n", horizOffset  ));
    GXV_TRACE(( " (vertOffset = %d)\n", vertOffset  ));


    /* validate justData */
    if ( 0 < horizOffset )
    {
      gxv_just_justData_validate( table + horizOffset, limit, valid );
      gxv_odtect_add_range( table + horizOffset, valid->subtable_length,
                            "horizJustData", odtect );
    }

    if ( 0 < vertOffset )
    {
      gxv_just_justData_validate( table + vertOffset, limit, valid );
      gxv_odtect_add_range( table + vertOffset, valid->subtable_length,
                            "vertJustData", odtect );
    }

    gxv_odtect_validate( odtect, valid );

    FT_TRACE4(( "\n" ));
  }
Beispiel #4
0
  /*
   * gxv_just_justData_validate() parses and validates horizData, vertData.
   */
  static void
  gxv_just_justData_validate( FT_Bytes       table,
                              FT_Bytes       limit,
                              GXV_Validator  valid )
  {
    /*
     * following 3 offsets are measured from the start of `just'
     * (which table points to), not justData
     */
    FT_UShort  justClassTableOffset;
    FT_UShort  wdcTableOffset;
    FT_UShort  pcTableOffset;
    FT_Bytes   p = table;

    GXV_ODTECT( 4, odtect );


    GXV_NAME_ENTER( "just justData" );

    GXV_ODTECT_INIT( odtect );
    GXV_LIMIT_CHECK( 2 + 2 + 2 );
    justClassTableOffset = FT_NEXT_USHORT( p );
    wdcTableOffset       = FT_NEXT_USHORT( p );
    pcTableOffset        = FT_NEXT_USHORT( p );

    GXV_TRACE(( " (justClassTableOffset = 0x%04x)\n", justClassTableOffset ));
    GXV_TRACE(( " (wdcTableOffset = 0x%04x)\n", wdcTableOffset ));
    GXV_TRACE(( " (pcTableOffset = 0x%04x)\n", pcTableOffset ));

    gxv_just_justData_lookuptable_validate( p, limit, valid );
    gxv_odtect_add_range( p, valid->subtable_length,
                          "just_LookupTable", odtect );

    if ( wdcTableOffset )
    {
      gxv_just_widthDeltaClusters_validate(
        valid->root->base + wdcTableOffset, limit, valid );
      gxv_odtect_add_range( valid->root->base + wdcTableOffset,
                            valid->subtable_length, "just_wdcTable", odtect );
    }

    if ( pcTableOffset )
    {
      gxv_just_postcompTable_validate( valid->root->base + pcTableOffset,
                                       limit, valid );
      gxv_odtect_add_range( valid->root->base + pcTableOffset,
                            valid->subtable_length, "just_pcTable", odtect );
    }

    if ( justClassTableOffset )
    {
      gxv_just_justClassTable_validate(
        valid->root->base + justClassTableOffset, limit, valid );
      gxv_odtect_add_range( valid->root->base + justClassTableOffset,
                            valid->subtable_length, "just_justClassTable",
                            odtect );
    }

    gxv_odtect_validate( odtect, valid );

    GXV_EXIT;
  }
Beispiel #5
0
  gxv_trak_validate( FT_Bytes      table,
                     FT_Face       face,
                     FT_Validator  ftvalid )
  {
    FT_Bytes          p = table;
    FT_Bytes          limit = 0;

    GXV_ValidatorRec  gxvalidrec;
    GXV_Validator     gxvalid = &gxvalidrec;
    GXV_trak_DataRec  trakrec;
    GXV_trak_Data     trak = &trakrec;

    FT_ULong   version;
    FT_UShort  format;
    FT_UShort  horizOffset;
    FT_UShort  vertOffset;
    FT_UShort  reserved;


    GXV_ODTECT( 3, odtect );

    GXV_ODTECT_INIT( odtect );
    gxvalid->root       = ftvalid;
    gxvalid->table_data = trak;
    gxvalid->face       = face;

    limit      = gxvalid->root->limit;

    FT_TRACE3(( "validating `trak' table\n" ));
    GXV_INIT;

    GXV_LIMIT_CHECK( 4 + 2 + 2 + 2 + 2 );
    version     = FT_NEXT_ULONG( p );
    format      = FT_NEXT_USHORT( p );
    horizOffset = FT_NEXT_USHORT( p );
    vertOffset  = FT_NEXT_USHORT( p );
    reserved    = FT_NEXT_USHORT( p );

    GXV_TRACE(( " (version = 0x%08x)\n", version ));
    GXV_TRACE(( " (format = 0x%04x)\n", format ));
    GXV_TRACE(( " (horizOffset = 0x%04x)\n", horizOffset ));
    GXV_TRACE(( " (vertOffset = 0x%04x)\n", vertOffset ));
    GXV_TRACE(( " (reserved = 0x%04x)\n", reserved ));

    /* Version 1.0 (always:1996) */
    if ( version != 0x00010000UL )
      FT_INVALID_FORMAT;

    /* format 0 (always:1996) */
    if ( format != 0x0000 )
      FT_INVALID_FORMAT;

    GXV_32BIT_ALIGNMENT_VALIDATE( horizOffset );
    GXV_32BIT_ALIGNMENT_VALIDATE( vertOffset );

    /* Reserved Fixed Value (always) */
    if ( reserved != 0x0000 )
      FT_INVALID_DATA;

    /* validate trackData */
    if ( 0 < horizOffset )
    {
      gxv_trak_trackData_validate( table + horizOffset, limit, gxvalid );
      gxv_odtect_add_range( table + horizOffset, gxvalid->subtable_length,
                            "horizJustData", odtect );
    }

    if ( 0 < vertOffset )
    {
      gxv_trak_trackData_validate( table + vertOffset, limit, gxvalid );
      gxv_odtect_add_range( table + vertOffset, gxvalid->subtable_length,
                            "vertJustData", odtect );
    }

    gxv_odtect_validate( odtect, gxvalid );

    FT_TRACE4(( "\n" ));
  }