1 files changed, 76 insertions, 0 deletions
diff --git a/crypto/src/asn1/cmp/KemBMParameter.cs b/crypto/src/asn1/cmp/KemBMParameter.cs
new file mode 100644
index 000000000..846233054
--- /dev/null
+++ b/crypto/src/asn1/cmp/KemBMParameter.cs
@@ -0,0 +1,76 @@
+using System;
+
+using Org.BouncyCastle.Asn1.X509;
+
+namespace Org.BouncyCastle.Asn1.Cmp
+{
+    /**
+     * <pre>
+     *  KemBMParameter ::= SEQUENCE {
+     *      kdf              AlgorithmIdentifier{KEY-DERIVATION, {...}},
+     *      len              INTEGER (1..MAX),
+     *      mac              AlgorithmIdentifier{MAC-ALGORITHM, {...}}
+     *   }
+     * </pre>
+     */
+    public class KemBMParameter
+        : Asn1Encodable
+    {
+        public static KemBMParameter GetInstance(object obj)
+        {
+            if (obj == null)
+                return null;
+            if (obj is KemBMParameter kemBMParameter)
+                return kemBMParameter;
+            return new KemBMParameter(Asn1Sequence.GetInstance(obj));
+        }
+
+        public static KemBMParameter GetInstance(Asn1TaggedObject taggedObject, bool declaredExplicit) =>
+            new KemBMParameter(Asn1Sequence.GetInstance(taggedObject, declaredExplicit));
+
+        private readonly AlgorithmIdentifier m_kdf;
+        private readonly DerInteger m_len;
+        private readonly AlgorithmIdentifier m_mac;
+
+        private KemBMParameter(Asn1Sequence seq)
+        {
+            if (seq.Count != 3)
+                throw new ArgumentException("sequence size should 3", nameof(seq));
+
+            m_kdf = AlgorithmIdentifier.GetInstance(seq[0]);
+            m_len = DerInteger.GetInstance(seq[1]);
+            m_mac = AlgorithmIdentifier.GetInstance(seq[2]);
+        }
+
+        public KemBMParameter(AlgorithmIdentifier kdf, DerInteger len, AlgorithmIdentifier mac)
+        {
+            m_kdf = kdf;
+            m_len = len;
+            m_mac = mac;
+        }
+
+        public KemBMParameter(AlgorithmIdentifier kdf, long len, AlgorithmIdentifier mac)
+            : this(kdf, new DerInteger(len), mac)
+        {
+        }
+
+        public virtual AlgorithmIdentifier Kdf => m_kdf;
+
+        public virtual DerInteger Len => m_len;
+
+        public virtual AlgorithmIdentifier Mac => m_mac;
+
+        /**
+         * <pre>
+         *  KemBMParameter ::= SEQUENCE {
+         *      kdf              AlgorithmIdentifier{KEY-DERIVATION, {...}},
+         *      len              INTEGER (1..MAX),
+         *      mac              AlgorithmIdentifier{MAC-ALGORITHM, {...}}
+         *    }
+         * </pre>
+         *
+         * @return a basic ASN.1 object representation.
+         */
+        public override Asn1Object ToAsn1Object() => new DerSequence(m_kdf, m_len, m_mac);
+    }
+}