1 files changed, 323 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/ASN1Sequence.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/ASN1Sequence.java
new file mode 100644
index 000000000..b2942fb1b
--- /dev/null
+++ b/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/ASN1Sequence.java
@@ -0,0 +1,323 @@
+package org.spongycastle.asn1;
+
+import java.io.IOException;
+import java.util.Enumeration;
+import java.util.Vector;
+
+public abstract class ASN1Sequence
+    extends ASN1Primitive
+{
+    protected Vector seq = new Vector();
+
+    /**
+     * return an ASN1Sequence from the given object.
+     *
+     * @param obj the object we want converted.
+     * @exception IllegalArgumentException if the object cannot be converted.
+     */
+    public static ASN1Sequence getInstance(
+        Object  obj)
+    {
+        if (obj == null || obj instanceof ASN1Sequence)
+        {
+            return (ASN1Sequence)obj;
+        }
+        else if (obj instanceof ASN1SequenceParser)
+        {
+            return ASN1Sequence.getInstance(((ASN1SequenceParser)obj).toASN1Primitive());
+        }
+        else if (obj instanceof byte[])
+        {
+            try
+            {
+                return ASN1Sequence.getInstance(fromByteArray((byte[])obj));
+            }
+            catch (IOException e)
+            {
+                throw new IllegalArgumentException("failed to construct sequence from byte[]: " + e.getMessage());
+            }
+        }
+        else if (obj instanceof ASN1Encodable)
+        {
+            ASN1Primitive primitive = ((ASN1Encodable)obj).toASN1Primitive();
+
+            if (primitive instanceof ASN1Sequence)
+            {
+                return (ASN1Sequence)primitive;
+            }
+        }
+
+        throw new IllegalArgumentException("unknown object in getInstance: " + obj.getClass().getName());
+    }
+
+    /**
+     * Return an ASN1 sequence from a tagged object. There is a special
+     * case here, if an object appears to have been explicitly tagged on 
+     * reading but we were expecting it to be implicitly tagged in the 
+     * normal course of events it indicates that we lost the surrounding
+     * sequence - so we need to add it back (this will happen if the tagged
+     * object is a sequence that contains other sequences). If you are
+     * dealing with implicitly tagged sequences you really <b>should</b>
+     * be using this method.
+     *
+     * @param obj the tagged object.
+     * @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 ASN1Sequence getInstance(
+        ASN1TaggedObject    obj,
+        boolean             explicit)
+    {
+        if (explicit)
+        {
+            if (!obj.isExplicit())
+            {
+                throw new IllegalArgumentException("object implicit - explicit expected.");
+            }
+
+            return ASN1Sequence.getInstance(obj.getObject().toASN1Primitive());
+        }
+        else
+        {
+            //
+            // constructed object which appears to be explicitly tagged
+            // when it should be implicit means we have to add the
+            // surrounding sequence.
+            //
+            if (obj.isExplicit())
+            {
+                if (obj instanceof BERTaggedObject)
+                {
+                    return new BERSequence(obj.getObject());
+                }
+                else
+                {
+                    return new DLSequence(obj.getObject());
+                }
+            }
+            else
+            {
+                if (obj.getObject() instanceof ASN1Sequence)
+                {
+                    return (ASN1Sequence)obj.getObject();
+                }
+            }
+        }
+
+        throw new IllegalArgumentException("unknown object in getInstance: " + obj.getClass().getName());
+    }
+
+    /**
+     * create an empty sequence
+     */
+    protected ASN1Sequence()
+    {
+    }
+
+    /**
+     * create a sequence containing one object
+     */
+    protected ASN1Sequence(
+        ASN1Encodable obj)
+    {
+        seq.addElement(obj);
+    }
+
+    /**
+     * create a sequence containing a vector of objects.
+     */
+    protected ASN1Sequence(
+        ASN1EncodableVector v)
+    {
+        for (int i = 0; i != v.size(); i++)
+        {
+            seq.addElement(v.get(i));
+        }
+    }
+
+    /**
+     * create a sequence containing a vector of objects.
+     */
+    protected ASN1Sequence(
+        ASN1Encodable[]   array)
+    {
+        for (int i = 0; i != array.length; i++)
+        {
+            seq.addElement(array[i]);
+        }
+    }
+
+    public ASN1Encodable[] toArray()
+    {
+        ASN1Encodable[] values = new ASN1Encodable[this.size()];
+
+        for (int i = 0; i != this.size(); i++)
+        {
+            values[i] = this.getObjectAt(i);
+        }
+
+        return values;
+    }
+
+    public Enumeration getObjects()
+    {
+        return seq.elements();
+    }
+
+    public ASN1SequenceParser parser()
+    {
+        final ASN1Sequence outer = this;
+
+        return new ASN1SequenceParser()
+        {
+            private final int max = size();
+
+            private int index;
+
+            public ASN1Encodable readObject() throws IOException
+            {
+                if (index == max)
+                {
+                    return null;
+                }
+                
+                ASN1Encodable obj = getObjectAt(index++);
+                if (obj instanceof ASN1Sequence)
+                {
+                    return ((ASN1Sequence)obj).parser();
+                }
+                if (obj instanceof ASN1Set)
+                {
+                    return ((ASN1Set)obj).parser();
+                }
+
+                return obj;
+            }
+
+            public ASN1Primitive getLoadedObject()
+            {
+                return outer;
+            }
+            
+            public ASN1Primitive toASN1Primitive()
+            {
+                return outer;
+            }
+        };
+    }
+
+    /**
+     * return the object at the sequence position indicated by index.
+     *
+     * @param index the sequence number (starting at zero) of the object
+     * @return the object at the sequence position indicated by index.
+     */
+    public ASN1Encodable getObjectAt(
+        int index)
+    {
+        return (ASN1Encodable)seq.elementAt(index);
+    }
+
+    /**
+     * return the number of objects in this sequence.
+     *
+     * @return the number of objects in this sequence.
+     */
+    public int size()
+    {
+        return seq.size();
+    }
+
+    public int hashCode()
+    {
+        Enumeration             e = this.getObjects();
+        int                     hashCode = size();
+
+        while (e.hasMoreElements())
+        {
+            Object o = getNext(e);
+            hashCode *= 17;
+
+            hashCode ^= o.hashCode();
+        }
+
+        return hashCode;
+    }
+
+    boolean asn1Equals(
+        ASN1Primitive o)
+    {
+        if (!(o instanceof ASN1Sequence))
+        {
+            return false;
+        }
+        
+        ASN1Sequence   other = (ASN1Sequence)o;
+
+        if (this.size() != other.size())
+        {
+            return false;
+        }
+
+        Enumeration s1 = this.getObjects();
+        Enumeration s2 = other.getObjects();
+
+        while (s1.hasMoreElements())
+        {
+            ASN1Encodable obj1 = getNext(s1);
+            ASN1Encodable obj2 = getNext(s2);
+
+            ASN1Primitive o1 = obj1.toASN1Primitive();
+            ASN1Primitive o2 = obj2.toASN1Primitive();
+
+            if (o1 == o2 || o1.equals(o2))
+            {
+                continue;
+            }
+
+            return false;
+        }
+
+        return true;
+    }
+
+    private ASN1Encodable getNext(Enumeration e)
+    {
+        ASN1Encodable encObj = (ASN1Encodable)e.nextElement();
+
+        return encObj;
+    }
+
+    ASN1Primitive toDERObject()
+    {
+        ASN1Sequence derSeq = new DERSequence();
+
+        derSeq.seq = this.seq;
+
+        return derSeq;
+    }
+
+    ASN1Primitive toDLObject()
+    {
+        ASN1Sequence dlSeq = new DLSequence();
+
+        dlSeq.seq = this.seq;
+
+        return dlSeq;
+    }
+
+    boolean isConstructed()
+    {
+        return true;
+    }
+
+    abstract void encode(ASN1OutputStream out)
+        throws IOException;
+
+    public String toString() 
+    {
+        return seq.toString();
+    }
+}