1 files changed, 88 insertions, 0 deletions
diff --git a/src/main/java/com/lowagie/bc/asn1/DERTaggedObject.java b/src/main/java/com/lowagie/bc/asn1/DERTaggedObject.java
new file mode 100644
index 0000000..dbc9e36
--- /dev/null
+++ b/src/main/java/com/lowagie/bc/asn1/DERTaggedObject.java
@@ -0,0 +1,88 @@
+package com.lowagie.bc.asn1;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+/**
+ * DER TaggedObject - in ASN.1 nottation this is any object proceeded by
+ * a [n] where n is some number - these are assume to follow the construction
+ * rules (as with sequences).
+ */
+public class DERTaggedObject
+    extends ASN1TaggedObject
+{
+    /**
+     * @param tagNo the tag number for this object.
+     * @param obj the tagged object.
+     */
+    public DERTaggedObject(
+        int             tagNo,
+        DEREncodable    obj)
+    {
+		super(tagNo, obj);
+    }
+
+    /**
+     * @param explicit true if an explicitly tagged object.
+     * @param tagNo the tag number for this object.
+     * @param obj the tagged object.
+     */
+    public DERTaggedObject(
+        boolean         explicit,
+        int             tagNo,
+        DEREncodable    obj)
+    {
+		super(explicit, tagNo, obj);
+    }
+
+    /**
+     * create an implicitly tagged object that contains a zero
+     * length sequence.
+     */
+    public DERTaggedObject(
+        int             tagNo)
+    {
+        super(false, tagNo, new DERSequence());
+    }
+
+    void encode(
+        DEROutputStream  out)
+        throws IOException
+    {
+        if (!empty)
+        {
+            ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
+            DEROutputStream         dOut = new DEROutputStream(bOut);
+
+            dOut.writeObject(obj);
+            dOut.close();
+
+            byte[]  bytes = bOut.toByteArray();
+
+            if (explicit)
+            {
+                out.writeEncoded(CONSTRUCTED | TAGGED | tagNo, bytes);
+            }
+            else
+            {
+                //
+                // need to mark constructed types...
+                //
+                if ((bytes[0] & CONSTRUCTED) != 0)
+                {
+                    bytes[0] = (byte)(CONSTRUCTED | TAGGED | tagNo);
+                }
+                else
+                {
+                    bytes[0] = (byte)(TAGGED | tagNo);
+                }
+
+                out.write(bytes);
+            }
+        }
+        else
+        {
+            out.writeEncoded(CONSTRUCTED | TAGGED | tagNo, new byte[0]);
+        }
+    }
+}