1 files changed, 80 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/cms/Evidence.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/cms/Evidence.java
new file mode 100644
index 000000000..a8b173f90
--- /dev/null
+++ b/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/cms/Evidence.java
@@ -0,0 +1,80 @@
+package org.spongycastle.asn1.cms;
+
+import org.spongycastle.asn1.ASN1Choice;
+import org.spongycastle.asn1.ASN1Object;
+import org.spongycastle.asn1.ASN1Primitive;
+import org.spongycastle.asn1.ASN1TaggedObject;
+import org.spongycastle.asn1.DERTaggedObject;
+
+/**
+ * <a href="http://tools.ietf.org/html/rfc5544">RFC 5544</a>:
+ * Binding Documents with Time-Stamps; Evidence object.
+ * <p>
+ * <pre>
+ * Evidence ::= CHOICE {
+ *     tstEvidence    [0] TimeStampTokenEvidence,   -- see RFC 3161
+ *     ersEvidence    [1] EvidenceRecord,           -- see RFC 4998
+ *     otherEvidence  [2] OtherEvidence
+ * }
+ * </pre>
+ */
+public class Evidence
+    extends ASN1Object
+    implements ASN1Choice
+{
+    private TimeStampTokenEvidence tstEvidence;
+
+    public Evidence(TimeStampTokenEvidence tstEvidence)
+    {
+        this.tstEvidence = tstEvidence;
+    }
+
+    private Evidence(ASN1TaggedObject tagged)
+    {
+        if (tagged.getTagNo() == 0)
+        {
+            this.tstEvidence = TimeStampTokenEvidence.getInstance(tagged, false);
+        }
+    }
+
+    /**
+     * Return an Evidence object from the given object.
+     * <p>
+     * Accepted inputs:
+     * <ul>
+     * <li> {@link Evidence} object
+     * <li> {@link org.spongycastle.asn1.ASN1TaggedObject#getInstance(java.lang.Object) ASN1TaggedObject} input formats with Evidence data inside
+     * </ul>
+     *
+     * @param obj the object we want converted.
+     * @exception IllegalArgumentException if the object cannot be converted.
+     */
+    public static Evidence getInstance(Object obj)
+    {
+        if (obj == null || obj instanceof Evidence)
+        {
+            return (Evidence)obj;
+        }
+        else if (obj instanceof ASN1TaggedObject)
+        {
+            return new Evidence(ASN1TaggedObject.getInstance(obj));
+        }
+
+        throw new IllegalArgumentException("unknown object in getInstance");
+    }
+
+    public TimeStampTokenEvidence getTstEvidence()
+    {
+        return tstEvidence;
+    }
+
+    public ASN1Primitive toASN1Primitive()
+    {
+       if (tstEvidence != null)
+       {
+           return new DERTaggedObject(false, 0, tstEvidence);
+       }
+
+       return null;
+    }
+}