2003/02/12 06:21:04

[org.ibex.core.git] / src / org / bouncycastle / asn1 / DERSequence.java

diff --git a/src/org/bouncycastle/asn1/DERSequence.java b/src/org/bouncycastle/asn1/DERSequence.java
new file mode 100644 (file)
index 0000000..b440858
--- /dev/null
+++ b/src/org/bouncycastle/asn1/DERSequence.java
@@ -0,0 +1,66 @@
+package org.bouncycastle.asn1;
+
+import java.io.*;
+import java.util.*;
+
+public class DERSequence
+    extends ASN1Sequence
+{
+    /**
+     * create an empty sequence
+     */
+    public DERSequence()
+    {
+    }
+
+    /**
+     * create a sequence containing one object
+     */
+    public DERSequence(
+        DEREncodable    obj)
+    {
+        this.addObject(obj);
+    }
+
+    /**
+     * create a sequence containing a vector of objects.
+     */
+    public DERSequence(
+        DEREncodableVector   v)
+    {
+        for (int i = 0; i != v.size(); i++)
+        {
+            this.addObject(v.get(i));
+        }
+    }
+
+    /*
+     * A note on the implementation:
+     * <p>
+     * As DER requires the constructed, definite-length model to
+     * be used for structured types, this varies slightly from the
+     * ASN.1 descriptions given. Rather than just outputing SEQUENCE,
+     * we also have to specify CONSTRUCTED, and the objects length.
+     */
+    void encode(
+        DEROutputStream out)
+        throws IOException
+    {
+        ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
+        DEROutputStream         dOut = new DEROutputStream(bOut);
+        Enumeration             e = this.getObjects();
+
+        while (e.hasMoreElements())
+        {
+            Object    obj = e.nextElement();
+
+            dOut.writeObject(obj);
+        }
+
+        dOut.close();
+
+        byte[]  bytes = bOut.toByteArray();
+
+        out.writeEncoded(SEQUENCE | CONSTRUCTED, bytes);
+    }
+}