diff --git a/Crypto/src/asn1/cryptopro/ECGOST3410ParamSetParameters.cs b/Crypto/src/asn1/cryptopro/ECGOST3410ParamSetParameters.cs
new file mode 100644
index 000000000..6f4435d7b
--- /dev/null
+++ b/Crypto/src/asn1/cryptopro/ECGOST3410ParamSetParameters.cs
@@ -0,0 +1,86 @@
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Asn1.CryptoPro
+{
+ public class ECGost3410ParamSetParameters
+ : Asn1Encodable
+ {
+ internal readonly DerInteger p, q, a, b, x, y;
+
+ public static ECGost3410ParamSetParameters GetInstance(
+ Asn1TaggedObject obj,
+ bool explicitly)
+ {
+ return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+ }
+
+ public static ECGost3410ParamSetParameters GetInstance(
+ object obj)
+ {
+ if (obj == null || obj is ECGost3410ParamSetParameters)
+ {
+ return (ECGost3410ParamSetParameters) obj;
+ }
+
+ if (obj is Asn1Sequence)
+ {
+ return new ECGost3410ParamSetParameters((Asn1Sequence) obj);
+ }
+
+ throw new ArgumentException("Invalid GOST3410Parameter: " + obj.GetType().Name);
+ }
+
+ public ECGost3410ParamSetParameters(
+ BigInteger a,
+ BigInteger b,
+ BigInteger p,
+ BigInteger q,
+ int x,
+ BigInteger y)
+ {
+ this.a = new DerInteger(a);
+ this.b = new DerInteger(b);
+ this.p = new DerInteger(p);
+ this.q = new DerInteger(q);
+ this.x = new DerInteger(x);
+ this.y = new DerInteger(y);
+ }
+
+ public ECGost3410ParamSetParameters(
+ Asn1Sequence seq)
+ {
+ if (seq.Count != 6)
+ throw new ArgumentException("Wrong number of elements in sequence", "seq");
+
+ this.a = DerInteger.GetInstance(seq[0]);
+ this.b = DerInteger.GetInstance(seq[1]);
+ this.p = DerInteger.GetInstance(seq[2]);
+ this.q = DerInteger.GetInstance(seq[3]);
+ this.x = DerInteger.GetInstance(seq[4]);
+ this.y = DerInteger.GetInstance(seq[5]);
+ }
+
+ public BigInteger P
+ {
+ get { return p.PositiveValue; }
+ }
+
+ public BigInteger Q
+ {
+ get { return q.PositiveValue; }
+ }
+
+ public BigInteger A
+ {
+ get { return a.PositiveValue; }
+ }
+
+ public override Asn1Object ToAsn1Object()
+ {
+ return new DerSequence(a, b, p, q, x, y);
+ }
+ }
+}
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