1 files changed, 79 insertions, 0 deletions
diff --git a/Crypto/src/asn1/cmp/Challenge.cs b/Crypto/src/asn1/cmp/Challenge.cs
new file mode 100644
index 000000000..bee5f96f5
--- /dev/null
+++ b/Crypto/src/asn1/cmp/Challenge.cs
@@ -0,0 +1,79 @@
+using System;
+
+using Org.BouncyCastle.Asn1.X509;
+
+namespace Org.BouncyCastle.Asn1.Cmp
+{
+ public class Challenge
+ : Asn1Encodable
+ {
+ private readonly AlgorithmIdentifier owf;
+ private readonly Asn1OctetString witness;
+ private readonly Asn1OctetString challenge;
+
+ private Challenge(Asn1Sequence seq)
+ {
+ int index = 0;
+
+ if (seq.Count == 3)
+ {
+ owf = AlgorithmIdentifier.GetInstance(seq[index++]);
+ }
+
+ witness = Asn1OctetString.GetInstance(seq[index++]);
+ challenge = Asn1OctetString.GetInstance(seq[index]);
+ }
+
+ public static Challenge GetInstance(object obj)
+ {
+ if (obj is Challenge)
+ return (Challenge)obj;
+
+ if (obj is Asn1Sequence)
+ return new Challenge((Asn1Sequence)obj);
+
+ throw new ArgumentException("Invalid object: " + obj.GetType().Name, "obj");
+ }
+
+ public virtual AlgorithmIdentifier Owf
+ {
+ get { return owf; }
+ }
+
+ /**
+ * <pre>
+ * Challenge ::= SEQUENCE {
+ * owf AlgorithmIdentifier OPTIONAL,
+ *
+ * -- MUST be present in the first Challenge; MAY be omitted in
+ * -- any subsequent Challenge in POPODecKeyChallContent (if
+ * -- omitted, then the owf used in the immediately preceding
+ * -- Challenge is to be used).
+ *
+ * witness OCTET STRING,
+ * -- the result of applying the one-way function (owf) to a
+ * -- randomly-generated INTEGER, A. [Note that a different
+ * -- INTEGER MUST be used for each Challenge.]
+ * challenge OCTET STRING
+ * -- the encryption (under the public key for which the cert.
+ * -- request is being made) of Rand, where Rand is specified as
+ * -- Rand ::= SEQUENCE {
+ * -- int INTEGER,
+ * -- - the randomly-generated INTEGER A (above)
+ * -- sender GeneralName
+ * -- - the sender's name (as included in PKIHeader)
+ * -- }
+ * }
+ * </pre>
+ * @return a basic ASN.1 object representation.
+ */
+ public override Asn1Object ToAsn1Object()
+ {
+ Asn1EncodableVector v = new Asn1EncodableVector();
+ v.AddOptional(owf);
+ v.Add(witness);
+ v.Add(challenge);
+ return new DerSequence(v);
+ }
+ }
+}
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