1 files changed, 65 insertions, 0 deletions
diff --git a/crypto/src/asn1/ess/ContentIdentifier.cs b/crypto/src/asn1/ess/ContentIdentifier.cs
new file mode 100644
index 000000000..8058dcc53
--- /dev/null
+++ b/crypto/src/asn1/ess/ContentIdentifier.cs
@@ -0,0 +1,65 @@
+using System;
+
+namespace Org.BouncyCastle.Asn1.Ess
+{
+	public class ContentIdentifier
+		: Asn1Encodable
+	{
+		private Asn1OctetString value;
+
+		public static ContentIdentifier GetInstance(
+			object o)
+		{
+			if (o == null || o is ContentIdentifier)
+			{
+				return (ContentIdentifier) o;
+			}
+
+			if (o is Asn1OctetString)
+			{
+				return new ContentIdentifier((Asn1OctetString) o);
+			}
+
+			throw new ArgumentException(
+				"unknown object in 'ContentIdentifier' factory : "
+				+ o.GetType().Name + ".");
+		}
+
+		/**
+		 * Create from OCTET STRING whose octets represent the identifier.
+		 */
+		public ContentIdentifier(
+			Asn1OctetString value)
+		{
+			this.value = value;
+		}
+
+		/**
+		 * Create from byte array representing the identifier.
+		 */
+		public ContentIdentifier(
+			byte[] value)
+			: this(new DerOctetString(value))
+		{
+		}
+
+		public Asn1OctetString Value
+		{
+			get { return value; }
+		}
+
+		/**
+		 * The definition of ContentIdentifier is
+		 * <pre>
+		 * ContentIdentifier ::=  OCTET STRING
+		 * </pre>
+		 * id-aa-contentIdentifier OBJECT IDENTIFIER ::= { iso(1)
+		 *  member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs9(9)
+		 *  smime(16) id-aa(2) 7 }
+		 */
+		public override Asn1Object ToAsn1Object()
+		{
+			return value;
+		}
+	}
+}