1 files changed, 98 insertions, 0 deletions
diff --git a/Crypto/src/asn1/crmf/ProofOfPossession.cs b/Crypto/src/asn1/crmf/ProofOfPossession.cs
new file mode 100644
index 000000000..fc00edb32
--- /dev/null
+++ b/Crypto/src/asn1/crmf/ProofOfPossession.cs
@@ -0,0 +1,98 @@
+using System;
+
+namespace Org.BouncyCastle.Asn1.Crmf
+{
+ public class ProofOfPossession
+ : Asn1Encodable, IAsn1Choice
+ {
+ public const int TYPE_RA_VERIFIED = 0;
+ public const int TYPE_SIGNING_KEY = 1;
+ public const int TYPE_KEY_ENCIPHERMENT = 2;
+ public const int TYPE_KEY_AGREEMENT = 3;
+
+ private readonly int tagNo;
+ private readonly Asn1Encodable obj;
+
+ private ProofOfPossession(Asn1TaggedObject tagged)
+ {
+ tagNo = tagged.TagNo;
+ switch (tagNo)
+ {
+ case 0:
+ obj = DerNull.Instance;
+ break;
+ case 1:
+ obj = PopoSigningKey.GetInstance(tagged, false);
+ break;
+ case 2:
+ case 3:
+ obj = PopoPrivKey.GetInstance(tagged, false);
+ break;
+ default:
+ throw new ArgumentException("unknown tag: " + tagNo, "tagged");
+ }
+ }
+
+ public static ProofOfPossession GetInstance(object obj)
+ {
+ if (obj is ProofOfPossession)
+ return (ProofOfPossession)obj;
+
+ if (obj is Asn1TaggedObject)
+ return new ProofOfPossession((Asn1TaggedObject)obj);
+
+ throw new ArgumentException("Invalid object: " + obj.GetType().Name, "obj");
+ }
+
+ /** Creates a ProofOfPossession with type raVerified. */
+ public ProofOfPossession()
+ {
+ tagNo = TYPE_RA_VERIFIED;
+ obj = DerNull.Instance;
+ }
+
+ /** Creates a ProofOfPossession for a signing key. */
+ public ProofOfPossession(PopoSigningKey Poposk)
+ {
+ tagNo = TYPE_SIGNING_KEY;
+ obj = Poposk;
+ }
+
+ /**
+ * Creates a ProofOfPossession for key encipherment or agreement.
+ * @param type one of TYPE_KEY_ENCIPHERMENT or TYPE_KEY_AGREEMENT
+ */
+ public ProofOfPossession(int type, PopoPrivKey privkey)
+ {
+ tagNo = type;
+ obj = privkey;
+ }
+
+ public virtual int Type
+ {
+ get { return tagNo; }
+ }
+
+ public virtual Asn1Encodable Object
+ {
+ get { return obj; }
+ }
+
+ /**
+ * <pre>
+ * ProofOfPossession ::= CHOICE {
+ * raVerified [0] NULL,
+ * -- used if the RA has already verified that the requester is in
+ * -- possession of the private key
+ * signature [1] PopoSigningKey,
+ * keyEncipherment [2] PopoPrivKey,
+ * keyAgreement [3] PopoPrivKey }
+ * </pre>
+ * @return a basic ASN.1 object representation.
+ */
+ public override Asn1Object ToAsn1Object()
+ {
+ return new DerTaggedObject(false, tagNo, obj);
+ }
+ }
+}
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