1 files changed, 56 insertions, 0 deletions
diff --git a/crypto/src/asn1/cmp/DhbmParameter.cs b/crypto/src/asn1/cmp/DhbmParameter.cs
new file mode 100644
index 000000000..aaf71f70e
--- /dev/null
+++ b/crypto/src/asn1/cmp/DhbmParameter.cs
@@ -0,0 +1,56 @@
+using System;
+
+using Org.BouncyCastle.Asn1.X509;
+
+namespace Org.BouncyCastle.Asn1.Cmp
+{
+    /**
+     * DHBMParameter ::= SEQUENCE {
+     * owf                 AlgorithmIdentifier,
+     * -- AlgId for a One-Way Function (SHA-1 recommended)
+     * mac                 AlgorithmIdentifier
+     * -- the MAC AlgId (e.g., DES-MAC, Triple-DES-MAC [PKCS11],
+     * }   -- or HMAC [RFC2104, RFC2202])
+     */
+    public class DhbmParameter
+        : Asn1Encodable
+    {
+        public static DhbmParameter GetInstance(object obj)
+        {
+            if (obj is DhbmParameter dhbmParameter)
+                return dhbmParameter;
+
+            if (obj != null)
+                return new DhbmParameter(Asn1Sequence.GetInstance(obj));
+
+            return null;
+        }
+
+        private readonly AlgorithmIdentifier m_owf;
+        private readonly AlgorithmIdentifier m_mac;
+
+        private DhbmParameter(Asn1Sequence sequence)
+        {
+            if (sequence.Count != 2)
+                throw new ArgumentException("expecting sequence size of 2");
+
+            m_owf = AlgorithmIdentifier.GetInstance(sequence[0]);
+            m_mac = AlgorithmIdentifier.GetInstance(sequence[1]);
+        }
+
+        public DhbmParameter(AlgorithmIdentifier owf, AlgorithmIdentifier mac)
+        {
+            m_owf = owf;
+            m_mac = mac;
+        }
+
+        public virtual AlgorithmIdentifier Owf => m_owf;
+
+        public virtual AlgorithmIdentifier Mac => m_mac;
+
+        public override Asn1Object ToAsn1Object()
+        {
+            return new DerSequence(m_owf, m_mac);
+        }
+    }
+}