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throw exceptions when pointers get too large

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This commit is contained in:
Andreas Schildbach 2012-08-16 17:13:58 +02:00
parent ad6d8b19cd
commit d75358989e
1 changed files with 6 additions and 0 deletions
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6
enabler/src/de/schildbach/pte/AbstractHafasProvider.java
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@ -1935,6 +1935,8 @@ public abstract class AbstractHafasProvider extends AbstractNetworkProvider
final short pointer = is.readShortReverse();
if (pointer == 0)
return null;
if (pointer >= table.length)
throw new IllegalStateException("pointer " + pointer + " cannot exceed strings table size " + table.length);
final InputStreamReader reader = new InputStreamReader(new ByteArrayInputStream(table, pointer, table.length - pointer), encoding);
@ -1973,6 +1975,8 @@ public abstract class AbstractHafasProvider extends AbstractNetworkProvider
public String[] read(final LittleEndianDataInputStream is) throws IOException
{
final short pointer = is.readShortReverse();
if (pointer >= table.length)
throw new IllegalStateException("pointer " + pointer + " cannot exceed comments table size " + table.length);
final LittleEndianDataInputStream commentsInputStream = new LittleEndianDataInputStream(new ByteArrayInputStream(table, pointer,
table.length - pointer));
@ -2013,6 +2017,8 @@ public abstract class AbstractHafasProvider extends AbstractNetworkProvider
{
final short index = is.readShortReverse();
final int ptr = index * 14;
if (ptr >= table.length)
throw new IllegalStateException("pointer " + ptr + " cannot exceed stations table size " + table.length);
final LittleEndianDataInputStream stationInputStream = new LittleEndianDataInputStream(new ByteArrayInputStream(table, ptr, 14));