1 files changed, 141 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/asn1/DERVisibleString.java b/core/src/main/java/org/spongycastle/asn1/DERVisibleString.java
new file mode 100644
index 00000000..b44ddb79
--- /dev/null
+++ b/core/src/main/java/org/spongycastle/asn1/DERVisibleString.java
@@ -0,0 +1,141 @@
+package org.spongycastle.asn1;
+
+import java.io.IOException;
+
+import org.spongycastle.util.Arrays;
+import org.spongycastle.util.Strings;
+
+/**
+ * DER VisibleString object encoding ISO 646 (ASCII) character code points 32 to 126.
+ * <p>
+ * Explicit character set escape sequences are not allowed.
+ * </p>
+ */
+public class DERVisibleString
+    extends ASN1Primitive
+    implements ASN1String
+{
+    private byte[]  string;
+
+    /**
+     * Return a Visible String from the passed in object.
+     *
+     * @param obj a DERVisibleString or an object that can be converted into one.
+     * @exception IllegalArgumentException if the object cannot be converted.
+     * @return a DERVisibleString instance, or null
+     */
+    public static DERVisibleString getInstance(
+        Object  obj)
+    {
+        if (obj == null || obj instanceof DERVisibleString)
+        {
+            return (DERVisibleString)obj;
+        }
+
+        if (obj instanceof byte[])
+        {
+            try
+            {
+                return (DERVisibleString)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 Visible 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 DERVisibleString instance, or null
+     */
+    public static DERVisibleString getInstance(
+        ASN1TaggedObject obj,
+        boolean          explicit)
+    {
+        ASN1Primitive o = obj.getObject();
+
+        if (explicit || o instanceof DERVisibleString)
+        {
+            return getInstance(o);
+        }
+        else
+        {
+            return new DERVisibleString(ASN1OctetString.getInstance(o).getOctets());
+        }
+    }
+
+    /**
+     * Basic constructor - byte encoded string.
+     */
+    DERVisibleString(
+        byte[]   string)
+    {
+        this.string = string;
+    }
+
+    /**
+     * Basic constructor
+     */
+    public DERVisibleString(
+        String   string)
+    {
+        this.string = Strings.toByteArray(string);
+    }
+
+    public String getString()
+    {
+        return Strings.fromByteArray(string);
+    }
+
+    public String toString()
+    {
+        return getString();
+    }
+
+    public byte[] getOctets()
+    {
+        return Arrays.clone(string);
+    }
+
+    boolean isConstructed()
+    {
+        return false;
+    }
+
+    int encodedLength()
+    {
+        return 1 + StreamUtil.calculateBodyLength(string.length) + string.length;
+    }
+
+    void encode(
+        ASN1OutputStream out)
+        throws IOException
+    {
+        out.writeEncoded(BERTags.VISIBLE_STRING, this.string);
+    }
+    
+    boolean asn1Equals(
+        ASN1Primitive o)
+    {
+        if (!(o instanceof DERVisibleString))
+        {
+            return false;
+        }
+
+        return Arrays.areEqual(string, ((DERVisibleString)o).string);
+    }
+    
+    public int hashCode()
+    {
+        return Arrays.hashCode(string);
+    }
+}