1 files changed, 77 insertions, 0 deletions
diff --git a/Crypto/src/asn1/x509/DSAParameter.cs b/Crypto/src/asn1/x509/DSAParameter.cs
new file mode 100644
index 000000000..b2b325f4d
--- /dev/null
+++ b/Crypto/src/asn1/x509/DSAParameter.cs
@@ -0,0 +1,77 @@
+using System;
+using System.Collections;
+
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Asn1.X509
+{
+ public class DsaParameter
+ : Asn1Encodable
+ {
+ internal readonly DerInteger p, q, g;
+
+ public static DsaParameter GetInstance(
+ Asn1TaggedObject obj,
+ bool explicitly)
+ {
+ return GetInstance(Asn1Sequence.GetInstance(obj, explicitly));
+ }
+
+ public static DsaParameter GetInstance(
+ object obj)
+ {
+ if(obj == null || obj is DsaParameter)
+ {
+ return (DsaParameter) obj;
+ }
+
+ if(obj is Asn1Sequence)
+ {
+ return new DsaParameter((Asn1Sequence) obj);
+ }
+
+ throw new ArgumentException("Invalid DsaParameter: " + obj.GetType().Name);
+ }
+
+ public DsaParameter(
+ BigInteger p,
+ BigInteger q,
+ BigInteger g)
+ {
+ this.p = new DerInteger(p);
+ this.q = new DerInteger(q);
+ this.g = new DerInteger(g);
+ }
+
+ private DsaParameter(
+ Asn1Sequence seq)
+ {
+ if (seq.Count != 3)
+ throw new ArgumentException("Bad sequence size: " + seq.Count, "seq");
+
+ this.p = DerInteger.GetInstance(seq[0]);
+ this.q = DerInteger.GetInstance(seq[1]);
+ this.g = DerInteger.GetInstance(seq[2]);
+ }
+
+ public BigInteger P
+ {
+ get { return p.PositiveValue; }
+ }
+
+ public BigInteger Q
+ {
+ get { return q.PositiveValue; }
+ }
+
+ public BigInteger G
+ {
+ get { return g.PositiveValue; }
+ }
+
+ public override Asn1Object ToAsn1Object()
+ {
+ return new DerSequence(p, q, g);
+ }
+ }
+}
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