2003/02/12 06:21:04

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

diff --git a/src/org/bouncycastle/asn1/DERUniversalString.java b/src/org/bouncycastle/asn1/DERUniversalString.java
new file mode 100644 (file)
index 0000000..ec12385
--- /dev/null
+++ b/src/org/bouncycastle/asn1/DERUniversalString.java
@@ -0,0 +1,100 @@
+package org.bouncycastle.asn1;
+
+import java.io.*;
+
+/**
+ * DER UniversalString object.
+ */
+public class DERUniversalString
+    extends DERObject
+    implements DERString
+{
+    byte[]  string;
+    char[]  table = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
+
+    /**
+     * return a Universal String from the passed in object.
+     *
+     * @exception IllegalArgumentException if the object cannot be converted.
+     */
+    public static DERUniversalString getInstance(
+        Object  obj)
+    {
+        if (obj == null || obj instanceof DERUniversalString)
+        {
+            return (DERUniversalString)obj;
+        }
+
+        if (obj instanceof ASN1OctetString)
+        {
+            return new DERUniversalString(((ASN1OctetString)obj).getOctets());
+        }
+
+        throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
+    }
+
+    /**
+     * return a Universal 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 DERUniversalString getInstance(
+        ASN1TaggedObject obj,
+        boolean          explicit)
+    {
+        return getInstance(obj.getObject());
+    }
+
+    /**
+     * basic constructor - byte encoded string.
+     */
+    public DERUniversalString(
+        byte[]   string)
+    {
+        this.string = string;
+    }
+
+    /**
+     * UniversalStrings have characters which are 4 bytes long - for the
+     * moment we just return them in Hex...
+     */
+    public String getString()
+    {
+        StringBuffer    buf = new StringBuffer();
+
+        for (int i = 0; i != string.length; i++)
+        {
+            buf.append(table[(string[i] >>> 4) % 0xf]);
+            buf.append(table[string[i] & 0xf]);
+        }
+
+        return buf.toString();
+    }
+
+    public byte[] getOctets()
+    {
+        return string;
+    }
+
+    void encode(
+        DEROutputStream  out)
+        throws IOException
+    {
+        out.writeEncoded(UNIVERSAL_STRING, this.getOctets());
+    }
+    
+    public boolean equals(
+        Object  o)
+    {
+        if ((o == null) || !(o instanceof DERUniversalString))
+        {
+            return false;
+        }
+
+        return this.getString().equals(((DERUniversalString)o).getString());
+    }
+}