1 files changed, 121 insertions, 0 deletions
diff --git a/src/main/java/com/lowagie/bc/asn1/DERBMPString.java b/src/main/java/com/lowagie/bc/asn1/DERBMPString.java
new file mode 100644
index 0000000..2e712e8
--- /dev/null
+++ b/src/main/java/com/lowagie/bc/asn1/DERBMPString.java
@@ -0,0 +1,121 @@
+package com.lowagie.bc.asn1;
+
+import java.io.IOException;
+
+/**
+ * DER BMPString object.
+ */
+public class DERBMPString
+    extends DERObject
+    implements DERString
+{
+    String  string;
+
+    /**
+     * return a BMP String from the given object.
+     *
+     * @param obj the object we want converted.
+     * @exception IllegalArgumentException if the object cannot be converted.
+     */
+    public static DERBMPString getInstance(
+        Object  obj)
+    {
+        if (obj == null || obj instanceof DERBMPString)
+        {
+            return (DERBMPString)obj;
+        }
+
+        if (obj instanceof ASN1OctetString)
+        {
+            return new DERBMPString(((ASN1OctetString)obj).getOctets());
+        }
+
+        if (obj instanceof ASN1TaggedObject)
+        {
+            return getInstance(((ASN1TaggedObject)obj).getObject());
+        }
+
+        throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
+    }
+
+    /**
+     * return a BMP 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 DERBMPString getInstance(
+        ASN1TaggedObject obj,
+        boolean          explicit)
+    {
+        return getInstance(obj.getObject());
+    }
+    
+
+    /**
+     * basic constructor - byte encoded string.
+     */
+    public DERBMPString(
+        byte[]   string)
+    {
+        char[]  cs = new char[string.length / 2];
+
+        for (int i = 0; i != cs.length; i++)
+        {
+            cs[i] = (char)((string[2 * i] << 8) | (string[2 * i + 1] & 0xff));
+        }
+
+        this.string = new String(cs);
+    }
+
+    /**
+     * basic constructor
+     */
+    public DERBMPString(
+        String   string)
+    {
+        this.string = string;
+    }
+
+    public String getString()
+    {
+        return string;
+    }
+
+    public int hashCode()
+    {
+        return this.getString().hashCode();
+    }
+
+    public boolean equals(
+        Object  o)
+    {
+        if (!(o instanceof DERBMPString))
+        {
+            return false;
+        }
+
+        DERBMPString  s = (DERBMPString)o;
+
+        return this.getString().equals(s.getString());
+    }
+
+    void encode(
+        DEROutputStream  out)
+        throws IOException
+    {
+        char[]  c = string.toCharArray();
+        byte[]  b = new byte[c.length * 2];
+
+        for (int i = 0; i != c.length; i++)
+        {
+            b[2 * i] = (byte)(c[i] >> 8);
+            b[2 * i + 1] = (byte)c[i];
+        }
+
+        out.writeEncoded(BMP_STRING, b);
+    }
+}