1 files changed, 32 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/asn1/LimitedInputStream.java b/core/src/main/java/org/spongycastle/asn1/LimitedInputStream.java
new file mode 100644
index 00000000..cc3273bf
--- /dev/null
+++ b/core/src/main/java/org/spongycastle/asn1/LimitedInputStream.java
@@ -0,0 +1,32 @@
+package org.spongycastle.asn1;
+
+import java.io.InputStream;
+
+abstract class LimitedInputStream
+        extends InputStream
+{
+    protected final InputStream _in;
+    private int _limit;
+
+    LimitedInputStream(
+        InputStream in,
+        int         limit)
+    {
+        this._in = in;
+        this._limit = limit;
+    }
+
+    int getRemaining()
+    {
+        // TODO: maybe one day this can become more accurate
+        return _limit;
+    }
+    
+    protected void setParentEofDetect(boolean on)
+    {
+        if (_in instanceof IndefiniteLengthInputStream)
+        {
+            ((IndefiniteLengthInputStream)_in).setEofOn00(on);
+        }
+    }
+}