1 files changed, 43 insertions, 0 deletions
diff --git a/core/src/main/java/org/bouncycastle/asn1/LazyConstructionEnumeration.java b/core/src/main/java/org/bouncycastle/asn1/LazyConstructionEnumeration.java
new file mode 100644
index 00000000..31d988d4
--- /dev/null
+++ b/core/src/main/java/org/bouncycastle/asn1/LazyConstructionEnumeration.java
@@ -0,0 +1,43 @@
+package org.bouncycastle.asn1;
+
+import java.io.IOException;
+import java.util.Enumeration;
+
+class LazyConstructionEnumeration
+    implements Enumeration
+{
+    private ASN1InputStream aIn;
+    private Object          nextObj;
+
+    public LazyConstructionEnumeration(byte[] encoded)
+    {
+        aIn = new ASN1InputStream(encoded, true);
+        nextObj = readObject();
+    }
+
+    public boolean hasMoreElements()
+    {
+        return nextObj != null;
+    }
+
+    public Object nextElement()
+    {
+        Object o = nextObj;
+
+        nextObj = readObject();
+
+        return o;
+    }
+
+    private Object readObject()
+    {
+        try
+        {
+            return aIn.readObject();
+        }
+        catch (IOException e)
+        {
+            throw new ASN1ParsingException("malformed DER construction: " + e, e);
+        }
+    }
+}