1 files changed, 87 insertions, 0 deletions
diff --git a/crypto/src/asn1/cmp/OobCertHash.cs b/crypto/src/asn1/cmp/OobCertHash.cs
new file mode 100644
index 000000000..63ddff7c4
--- /dev/null
+++ b/crypto/src/asn1/cmp/OobCertHash.cs
@@ -0,0 +1,87 @@
+using System;
+
+using Org.BouncyCastle.Asn1.Crmf;
+using Org.BouncyCastle.Asn1.X509;
+
+namespace Org.BouncyCastle.Asn1.Cmp
+{
+	public class OobCertHash
+		: Asn1Encodable
+	{
+		private readonly AlgorithmIdentifier hashAlg;
+		private readonly CertId certId;
+		private readonly DerBitString  hashVal;
+
+		private OobCertHash(Asn1Sequence seq)
+		{
+			int index = seq.Count - 1;
+
+			hashVal = DerBitString.GetInstance(seq[index--]);
+
+			for (int i = index; i >= 0; i--)
+			{
+				Asn1TaggedObject tObj = (Asn1TaggedObject)seq[i];
+
+				if (tObj.TagNo == 0)
+				{
+					hashAlg = AlgorithmIdentifier.GetInstance(tObj, true);
+				}
+				else
+				{
+					certId = CertId.GetInstance(tObj, true);
+				}
+			}
+		}
+
+		public static OobCertHash GetInstance(object obj)
+		{
+			if (obj is OobCertHash)
+				return (OobCertHash)obj;
+
+			if (obj is Asn1Sequence)
+				return new OobCertHash((Asn1Sequence)obj);
+
+            throw new ArgumentException("Invalid object: " + obj.GetType().Name, "obj");
+		}
+		
+		public virtual AlgorithmIdentifier HashAlg
+		{
+			get { return hashAlg; }
+		}
+		
+		public virtual CertId CertID
+		{
+			get { return certId; }
+		}
+		
+		/**
+		 * <pre>
+		 * OobCertHash ::= SEQUENCE {
+		 *                      hashAlg     [0] AlgorithmIdentifier     OPTIONAL,
+		 *                      certId      [1] CertId                  OPTIONAL,
+		 *                      hashVal         BIT STRING
+		 *                      -- hashVal is calculated over the Der encoding of the
+		 *                      -- self-signed certificate with the identifier certID.
+		 *       }
+		 * </pre>
+		 * @return a basic ASN.1 object representation.
+		 */
+		public override Asn1Object ToAsn1Object()
+		{
+			Asn1EncodableVector v = new Asn1EncodableVector();
+			AddOptional(v, 0, hashAlg);
+			AddOptional(v, 1, certId);
+			v.Add(hashVal);
+			return new DerSequence(v);
+		}
+
+		private void AddOptional(Asn1EncodableVector v, int tagNo, Asn1Encodable obj)
+		{
+			if (obj != null)
+			{
+				v.Add(new DerTaggedObject(true, tagNo, obj));
+			}
+		}
+	}
+}
+