2003/02/12 06:21:04

[org.ibex.core.git] / src / org / bouncycastle / asn1 / ASN1OctetString.java

diff --git a/src/org/bouncycastle/asn1/ASN1OctetString.java b/src/org/bouncycastle/asn1/ASN1OctetString.java
new file mode 100644 (file)
index 0000000..7daf025
--- /dev/null
+++ b/src/org/bouncycastle/asn1/ASN1OctetString.java
@@ -0,0 +1,139 @@
+package org.bouncycastle.asn1;
+
+import java.io.*;
+import java.util.*;
+
+public abstract class ASN1OctetString
+    extends DERObject
+{
+    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)
+    {
+        this.string = string;
+    }
+
+    public ASN1OctetString(
+        DEREncodable obj)
+    {
+        try
+        {
+            ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
+            DEROutputStream         dOut = new DEROutputStream(bOut);
+
+            dOut.writeObject(obj);
+            dOut.close();
+
+            this.string = bOut.toByteArray();
+        }
+        catch (IOException e)
+        {
+            throw new IllegalArgumentException("Error processing object : " + e.toString());
+        }
+    }
+
+    public byte[] getOctets()
+    {
+        return string;
+    }
+
+    public int hashCode()
+    {
+        byte[]  b = this.getOctets();
+        int     value = 0;
+
+        for (int i = 0; i != b.length; i++)
+        {
+            value ^= (b[i] & 0xff) << (i % 4);
+        }
+
+        return value;
+    }
+
+    public boolean equals(
+        Object  o)
+    {
+        if (o == null || !(o instanceof DEROctetString))
+        {
+            return false;
+        }
+
+        DEROctetString  other = (DEROctetString)o;
+
+        byte[] b1 = other.getOctets();
+        byte[] b2 = this.getOctets();
+
+        if (b1.length != b2.length)
+        {
+            return false;
+        }
+
+        for (int i = 0; i != b1.length; i++)
+        {
+            if (b1[i] != b2[i])
+            {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    abstract void encode(DEROutputStream out)
+        throws IOException;
+}