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Check for shape table

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This commit is contained in:
Denis Molony 2016-12-17 21:02:38 +11:00
parent 343d460679
commit 871fb79913
1 changed files with 6 additions and 0 deletions
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6
src/com/bytezone/diskbrowser/applefile/ShapeTable.java
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@ -134,6 +134,11 @@ public class ShapeTable extends AbstractFile
if (totalShapes == 0) if (totalShapes == 0)
return false; return false;
// this prevents large files that start with a very small value
// System.out.printf ("Average shape length: %d%n", buffer.length / totalShapes);
if (totalShapes * 500 < buffer.length)
return false;
for (int i = 0; i < totalShapes; i++) for (int i = 0; i < totalShapes; i++)
{ {
// check index table entry is inside the file // check index table entry is inside the file
@ -149,6 +154,7 @@ public class ShapeTable extends AbstractFile
// check offset is unique // check offset is unique
if (offsets.contains (offset)) if (offsets.contains (offset))
return false; return false;
offsets.add (offset); offsets.add (offset);
} }