1 files changed, 103 insertions, 0 deletions
diff --git a/src/main/java/com/lowagie/bc/asn1/DERBoolean.java b/src/main/java/com/lowagie/bc/asn1/DERBoolean.java
new file mode 100644
index 0000000..5b6d1bf
--- /dev/null
+++ b/src/main/java/com/lowagie/bc/asn1/DERBoolean.java
@@ -0,0 +1,103 @@
+package com.lowagie.bc.asn1;
+
+import java.io.IOException;
+
+public class DERBoolean
+    extends DERObject
+{
+    byte         value;
+
+	public static final DERBoolean FALSE = new DERBoolean(false);
+	public static final DERBoolean TRUE  = new DERBoolean(true);
+
+    /**
+     * return a boolean from the passed in object.
+     *
+     * @exception IllegalArgumentException if the object cannot be converted.
+     */
+    public static DERBoolean getInstance(
+        Object  obj)
+    {
+        if (obj == null || obj instanceof DERBoolean)
+        {
+            return (DERBoolean)obj;
+        }
+
+        if (obj instanceof ASN1OctetString)
+        {
+            return new DERBoolean(((ASN1OctetString)obj).getOctets());
+        }
+
+        if (obj instanceof ASN1TaggedObject)
+        {
+            return getInstance(((ASN1TaggedObject)obj).getObject());
+        }
+
+        throw new IllegalArgumentException("illegal object in getInstance: " + obj.getClass().getName());
+    }
+
+    /**
+     * return a DERBoolean from the passed in boolean.
+     */
+    public static DERBoolean getInstance(
+        boolean  value)
+    {
+        return (value ? TRUE : FALSE);
+    }
+
+    /**
+     * return a Boolean 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 DERBoolean getInstance(
+        ASN1TaggedObject obj,
+        boolean          explicit)
+    {
+        return getInstance(obj.getObject());
+    }
+    
+    public DERBoolean(
+        byte[]       value)
+    {
+        this.value = value[0];
+    }
+
+    public DERBoolean(
+        boolean     value)
+    {
+        this.value = (value) ? (byte)0xff : (byte)0;
+    }
+
+    public boolean isTrue()
+    {
+        return (value != 0);
+    }
+
+    void encode(
+        DEROutputStream out)
+        throws IOException
+    {
+        byte[]  bytes = new byte[1];
+
+        bytes[0] = value;
+
+        out.writeEncoded(BOOLEAN, bytes);
+    }
+    
+    public boolean equals(
+        Object  o)
+    {
+        if ((o == null) || !(o instanceof DERBoolean))
+        {
+            return false;
+        }
+
+        return (value == ((DERBoolean)o).value);
+    }
+
+}