1 files changed, 61 insertions, 0 deletions
diff --git a/Crypto/src/asn1/pkcs/PBES2Parameters.cs b/Crypto/src/asn1/pkcs/PBES2Parameters.cs
new file mode 100644
index 000000000..645bb867c
--- /dev/null
+++ b/Crypto/src/asn1/pkcs/PBES2Parameters.cs
@@ -0,0 +1,61 @@
+using System;
+using System.Collections;
+
+namespace Org.BouncyCastle.Asn1.Pkcs
+{
+ public class PbeS2Parameters
+ : Asn1Encodable
+ {
+ private readonly KeyDerivationFunc func;
+ private readonly EncryptionScheme scheme;
+
+ public static PbeS2Parameters GetInstance(
+ object obj)
+ {
+ if (obj == null || obj is PbeS2Parameters)
+ return (PbeS2Parameters) obj;
+
+ if (obj is Asn1Sequence)
+ return new PbeS2Parameters((Asn1Sequence) obj);
+
+ throw new ArgumentException("Unknown object in factory: " + obj.GetType().FullName, "obj");
+ }
+
+ public PbeS2Parameters(
+ Asn1Sequence seq)
+ {
+ if (seq.Count != 2)
+ throw new ArgumentException("Wrong number of elements in sequence", "seq");
+
+ Asn1Sequence funcSeq = (Asn1Sequence)seq[0].ToAsn1Object();
+
+ // TODO Not sure if this special case is really necessary/appropriate
+ if (funcSeq[0].Equals(PkcsObjectIdentifiers.IdPbkdf2))
+ {
+ func = new KeyDerivationFunc(PkcsObjectIdentifiers.IdPbkdf2,
+ Pbkdf2Params.GetInstance(funcSeq[1]));
+ }
+ else
+ {
+ func = new KeyDerivationFunc(funcSeq);
+ }
+
+ scheme = EncryptionScheme.GetInstance(seq[1].ToAsn1Object());
+ }
+
+ public KeyDerivationFunc KeyDerivationFunc
+ {
+ get { return func; }
+ }
+
+ public EncryptionScheme EncryptionScheme
+ {
+ get { return scheme; }
+ }
+
+ public override Asn1Object ToAsn1Object()
+ {
+ return new DerSequence(func, scheme);
+ }
+ }
+}
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