1 files changed, 171 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/cms/RecipientKeyIdentifier.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/cms/RecipientKeyIdentifier.java
new file mode 100644
index 000000000..92377c41b
--- /dev/null
+++ b/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/cms/RecipientKeyIdentifier.java
@@ -0,0 +1,171 @@
+package org.spongycastle.asn1.cms;
+
+import org.spongycastle.asn1.ASN1EncodableVector;
+import org.spongycastle.asn1.ASN1Object;
+import org.spongycastle.asn1.ASN1OctetString;
+import org.spongycastle.asn1.ASN1Primitive;
+import org.spongycastle.asn1.ASN1Sequence;
+import org.spongycastle.asn1.ASN1TaggedObject;
+import org.spongycastle.asn1.DERGeneralizedTime;
+import org.spongycastle.asn1.DEROctetString;
+import org.spongycastle.asn1.DERSequence;
+
+/**
+ * <a href="http://tools.ietf.org/html/rfc5652#section-6.2.2">RFC 5652</a>:
+ * Content encryption key delivery mechanisms.
+ * <p>
+ * <pre>
+ * RecipientKeyIdentifier ::= SEQUENCE {
+ *     subjectKeyIdentifier SubjectKeyIdentifier,
+ *     date GeneralizedTime OPTIONAL,
+ *     other OtherKeyAttribute OPTIONAL 
+ * }
+ *
+ * SubjectKeyIdentifier ::= OCTET STRING
+ * </pre>
+ */
+public class RecipientKeyIdentifier
+    extends ASN1Object
+{
+    private ASN1OctetString      subjectKeyIdentifier;
+    private DERGeneralizedTime   date;
+    private OtherKeyAttribute    other;
+
+    public RecipientKeyIdentifier(
+        ASN1OctetString         subjectKeyIdentifier,
+        DERGeneralizedTime      date,
+        OtherKeyAttribute       other)
+    {
+        this.subjectKeyIdentifier = subjectKeyIdentifier;
+        this.date = date;
+        this.other = other;
+    }
+
+    public RecipientKeyIdentifier(
+        byte[]                  subjectKeyIdentifier,
+        DERGeneralizedTime      date,
+        OtherKeyAttribute       other)
+    {
+        this.subjectKeyIdentifier = new DEROctetString(subjectKeyIdentifier);
+        this.date = date;
+        this.other = other;
+    }
+
+    public RecipientKeyIdentifier(
+        byte[]         subjectKeyIdentifier)
+    {
+        this(subjectKeyIdentifier, null, null);
+    }
+
+    /**
+     * @deprecated use getInstance()
+     */
+    public RecipientKeyIdentifier(
+        ASN1Sequence seq)
+    {
+        subjectKeyIdentifier = ASN1OctetString.getInstance(
+                                                    seq.getObjectAt(0));
+        
+        switch(seq.size())
+        {
+        case 1:
+            break;
+        case 2:
+            if (seq.getObjectAt(1) instanceof DERGeneralizedTime)
+            {
+                date = (DERGeneralizedTime)seq.getObjectAt(1); 
+            }
+            else
+            {
+                other = OtherKeyAttribute.getInstance(seq.getObjectAt(2));
+            }
+            break;
+        case 3:
+            date  = (DERGeneralizedTime)seq.getObjectAt(1);
+            other = OtherKeyAttribute.getInstance(seq.getObjectAt(2));
+            break;
+        default:
+            throw new IllegalArgumentException("Invalid RecipientKeyIdentifier");
+        }
+    }
+
+    /**
+     * Return a RecipientKeyIdentifier object from a tagged object.
+     *
+     * @param ato the tagged object holding the object we want.
+     * @param isExplicit true if the object is meant to be explicitly
+     *              tagged false otherwise.
+     * @exception IllegalArgumentException if the object held by the
+     *          tagged object cannot be converted.
+     */
+    public static RecipientKeyIdentifier getInstance(ASN1TaggedObject ato, boolean isExplicit)
+    {
+        return getInstance(ASN1Sequence.getInstance(ato, isExplicit));
+    }
+    
+    /**
+     * Return a RecipientKeyIdentifier object from the given object.
+     * <p>
+     * Accepted inputs:
+     * <ul>
+     * <li> null &rarr; null
+     * <li> {@link RecipientKeyIdentifier} object
+     * <li> {@link org.spongycastle.asn1.ASN1Sequence#getInstance(java.lang.Object) ASN1Sequence} input formats with RecipientKeyIdentifier structure inside
+     * </ul>
+     *
+     * @param obj the object we want converted.
+     * @exception IllegalArgumentException if the object cannot be converted.
+     */
+    public static RecipientKeyIdentifier getInstance(Object obj)
+    {
+        if (obj instanceof RecipientKeyIdentifier)
+        {
+            return (RecipientKeyIdentifier)obj;
+        }
+        
+        if(obj != null)
+        {
+            return new RecipientKeyIdentifier(ASN1Sequence.getInstance(obj));
+        }
+        
+        return null;
+    } 
+
+    public ASN1OctetString getSubjectKeyIdentifier()
+    {
+        return subjectKeyIdentifier;
+    }
+
+    public DERGeneralizedTime getDate()
+    {
+        return date;
+    }
+
+    public OtherKeyAttribute getOtherKeyAttribute()
+    {
+        return other;
+    }
+
+
+    /** 
+     * Produce an object suitable for an ASN1OutputStream.
+     */
+    public ASN1Primitive toASN1Primitive()
+    {
+        ASN1EncodableVector  v = new ASN1EncodableVector();
+
+        v.add(subjectKeyIdentifier);
+        
+        if (date != null)
+        {
+            v.add(date);
+        }
+
+        if (other != null)
+        {
+            v.add(other);
+        }
+        
+        return new DERSequence(v);
+    }
+}