1 files changed, 157 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/asn1/DERBMPString.java b/core/src/main/java/org/spongycastle/asn1/DERBMPString.java
new file mode 100644
index 00000000..ad752583
--- /dev/null
+++ b/core/src/main/java/org/spongycastle/asn1/DERBMPString.java
@@ -0,0 +1,157 @@
+package org.spongycastle.asn1;
+
+import java.io.IOException;
+
+import org.spongycastle.util.Arrays;
+
+/**
+ * DER BMPString object.
+ */
+public class DERBMPString
+    extends ASN1Primitive
+    implements ASN1String
+{
+    private char[]  string;
+
+    /**
+     * return a BMP String from the given object.
+     *
+     * @param obj the object we want converted.
+     * @exception IllegalArgumentException if the object cannot be converted.
+     * @return a DERBMPString instance, or null.
+     */
+    public static DERBMPString getInstance(
+        Object  obj)
+    {
+        if (obj == null || obj instanceof DERBMPString)
+        {
+            return (DERBMPString)obj;
+        }
+
+        if (obj instanceof byte[])
+        {
+            try
+            {
+                return (DERBMPString)fromByteArray((byte[])obj);
+            }
+            catch (Exception e)
+            {
+                throw new IllegalArgumentException("encoding error in getInstance: " + e.toString());
+            }
+        }
+
+        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.
+     * @return a DERBMPString instance.
+     */
+    public static DERBMPString getInstance(
+        ASN1TaggedObject obj,
+        boolean          explicit)
+    {
+        ASN1Primitive o = obj.getObject();
+
+        if (explicit || o instanceof DERBMPString)
+        {
+            return getInstance(o);
+        }
+        else
+        {
+            return new DERBMPString(ASN1OctetString.getInstance(o).getOctets());
+        }
+    }
+
+    /**
+     * basic constructor - byte encoded string.
+     * @param string the encoded BMP STRING to wrap.
+     */
+    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 = cs;
+    }
+
+    DERBMPString(char[] string)
+    {
+        this.string = string;
+    }
+
+    /**
+     * basic constructor
+     * @param string a String to wrap as a BMP STRING.
+     */
+    public DERBMPString(
+        String   string)
+    {
+        this.string = string.toCharArray();
+    }
+
+    public String getString()
+    {
+        return new String(string);
+    }
+
+    public String toString()
+    {
+        return getString();
+    }
+
+    public int hashCode()
+    {
+        return Arrays.hashCode(string);
+    }
+
+    protected boolean asn1Equals(
+        ASN1Primitive o)
+    {
+        if (!(o instanceof DERBMPString))
+        {
+            return false;
+        }
+
+        DERBMPString  s = (DERBMPString)o;
+
+        return Arrays.areEqual(string, s.string);
+    }
+
+    boolean isConstructed()
+    {
+        return false;
+    }
+
+    int encodedLength()
+    {
+        return 1 + StreamUtil.calculateBodyLength(string.length * 2) + (string.length * 2);
+    }
+
+    void encode(
+        ASN1OutputStream out)
+        throws IOException
+    {
+        out.write(BERTags.BMP_STRING);
+        out.writeLength(string.length * 2);
+
+        for (int i = 0; i != string.length; i++)
+        {
+            char c = string[i];
+
+            out.write((byte)(c >> 8));
+            out.write((byte)c);
+        }
+    }
+}