Initial checkin of BitCoinJ

src/com/google/bitcoin/bouncycastle/asn1/ASN1OctetString.java

@@ -0,0 +1,135 @@
+package com.google.bitcoin.bouncycastle.asn1;
+
+import com.google.bitcoin.bouncycastle.util.Arrays;
+import com.google.bitcoin.bouncycastle.util.encoders.Hex;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Enumeration;
+import java.util.Vector;
+
+public abstract class ASN1OctetString
+    extends ASN1Object
+    implements ASN1OctetStringParser
+{
+    byte[]  string;
+
+    /**
+     * return an Octet String from a tagged object.
+     *
+     * @param obj the tagged object holding the object we want.
+     * @param explicit true if the object is meant to be explicitly
+     *              tagged false otherwise.
+     * @exception IllegalArgumentException if the tagged object cannot
+     *              be converted.
+     */
+    public static ASN1OctetString getInstance(
+        ASN1TaggedObject    obj,
+        boolean             explicit)
+    {
+        return getInstance(obj.getObject());
+    }
+    
+    /**
+     * return an Octet String from the given object.
+     *
+     * @param obj the object we want converted.
+     * @exception IllegalArgumentException if the object cannot be converted.
+     */
+    public static ASN1OctetString getInstance(
+        Object  obj)
+    {
+        if (obj == null || obj instanceof ASN1OctetString)
+        {
+            return (ASN1OctetString)obj;
+        }
+
+        if (obj instanceof ASN1TaggedObject)
+        {
+            return getInstance(((ASN1TaggedObject)obj).getObject());
+        }
+
+        if (obj instanceof ASN1Sequence)
+        {
+            Vector      v = new Vector();
+            Enumeration e = ((ASN1Sequence)obj).getObjects();
+
+            while (e.hasMoreElements())
+            {
+                v.addElement(e.nextElement());
+            }
+
+            return new BERConstructedOctetString(v);
+        }
+
+        throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
+    }
+
+    /**
+     * @param string the octets making up the octet string.
+     */
+    public ASN1OctetString(
+        byte[]  string)
+    {
+        if (string == null)
+        {
+            throw new NullPointerException("string cannot be null");
+        }
+        this.string = string;
+    }
+
+    public ASN1OctetString(
+        DEREncodable obj)
+    {
+        try
+        {
+            this.string = obj.getDERObject().getEncoded(ASN1Encodable.DER);
+        }
+        catch (IOException e)
+        {
+            throw new IllegalArgumentException("Error processing object : " + e.toString());
+        }
+    }
+
+    public InputStream getOctetStream()
+    {
+        return new ByteArrayInputStream(string);
+    }
+
+    public ASN1OctetStringParser parser()
+    {
+        return this;
+    }
+
+    public byte[] getOctets()
+    {
+        return string;
+    }
+
+    public int hashCode()
+    {
+        return Arrays.hashCode(this.getOctets());
+    }
+
+    boolean asn1Equals(
+        DERObject  o)
+    {
+        if (!(o instanceof ASN1OctetString))
+        {
+            return false;
+        }
+
+        ASN1OctetString  other = (ASN1OctetString)o;
+
+        return Arrays.areEqual(string, other.string);
+    }
+
+    abstract void encode(DEROutputStream out)
+        throws IOException;
+
+    public String toString()
+    {
+      return "#"+new String(Hex.encode(string));
+    }
+}