1 files changed, 111 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/asn1/ASN1Object.java b/core/src/main/java/org/spongycastle/asn1/ASN1Object.java
new file mode 100644
index 00000000..1dbfd26a
--- /dev/null
+++ b/core/src/main/java/org/spongycastle/asn1/ASN1Object.java
@@ -0,0 +1,111 @@
+package org.spongycastle.asn1;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+/**
+ * Base class for defining an ASN.1 object.
+ */
+public abstract class ASN1Object
+    implements ASN1Encodable
+{
+    /**
+     * Return the default BER or DER encoding for this object.
+     *
+     * @return BER/DER byte encoded object.
+     * @throws java.io.IOException on encoding error.
+     */
+    public byte[] getEncoded()
+        throws IOException
+    {
+        ByteArrayOutputStream bOut = new ByteArrayOutputStream();
+        ASN1OutputStream      aOut = new ASN1OutputStream(bOut);
+
+        aOut.writeObject(this);
+
+        return bOut.toByteArray();
+    }
+
+    /**
+     * Return either the default for "BER" or a DER encoding if "DER" is specified.
+     *
+     * @param encoding name of encoding to use.
+     * @return byte encoded object.
+     * @throws IOException on encoding error.
+     */
+    public byte[] getEncoded(
+        String encoding)
+        throws IOException
+    {
+        if (encoding.equals(ASN1Encoding.DER))
+        {
+            ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
+            DEROutputStream         dOut = new DEROutputStream(bOut);
+
+            dOut.writeObject(this);
+
+            return bOut.toByteArray();
+        }
+        else if (encoding.equals(ASN1Encoding.DL))
+        {
+            ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
+            DLOutputStream          dOut = new DLOutputStream(bOut);
+
+            dOut.writeObject(this);
+
+            return bOut.toByteArray();
+        }
+
+        return this.getEncoded();
+    }
+
+    public int hashCode()
+    {
+        return this.toASN1Primitive().hashCode();
+    }
+
+    public boolean equals(
+        Object  o)
+    {
+        if (this == o)
+        {
+            return true;
+        }
+
+        if (!(o instanceof ASN1Encodable))
+        {
+            return false;
+        }
+
+        ASN1Encodable other = (ASN1Encodable)o;
+
+        return this.toASN1Primitive().equals(other.toASN1Primitive());
+    }
+
+    /**
+     * @deprecated use toASN1Primitive()
+     * @return the underlying primitive type.
+     */
+    public ASN1Primitive toASN1Object()
+    {
+        return this.toASN1Primitive();
+    }
+
+    /**
+     * Return true if obj is a byte array and represents an object with the given tag value.
+     *
+     * @param obj object of interest.
+     * @param tagValue tag value to check for.
+     * @return  true if obj is a byte encoding starting with the given tag value, false otherwise.
+     */
+    protected static boolean hasEncodedTagValue(Object obj, int tagValue)
+    {
+        return (obj instanceof byte[]) && ((byte[])obj)[0] == tagValue;
+    }
+
+    /**
+     * Method providing a primitive representation of this object suitable for encoding.
+     * @return a primitive representation of this object.
+     */
+    public abstract ASN1Primitive toASN1Primitive();
+}