1 files changed, 86 insertions, 0 deletions
diff --git a/Crypto/src/asn1/pkcs/PBKDF2Params.cs b/Crypto/src/asn1/pkcs/PBKDF2Params.cs
new file mode 100644
index 000000000..1351b94cf
--- /dev/null
+++ b/Crypto/src/asn1/pkcs/PBKDF2Params.cs
@@ -0,0 +1,86 @@
+using System;
+
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Asn1.Pkcs
+{
+ public class Pbkdf2Params
+ : Asn1Encodable
+ {
+ private readonly Asn1OctetString octStr;
+ private readonly DerInteger iterationCount;
+ private readonly DerInteger keyLength;
+
+ public static Pbkdf2Params GetInstance(
+ object obj)
+ {
+ if (obj == null || obj is Pbkdf2Params)
+ return (Pbkdf2Params)obj;
+
+ if (obj is Asn1Sequence)
+ return new Pbkdf2Params((Asn1Sequence)obj);
+
+ throw new ArgumentException("Unknown object in factory: " + obj.GetType().FullName, "obj");
+ }
+
+ public Pbkdf2Params(
+ Asn1Sequence seq)
+ {
+ if (seq.Count < 2 || seq.Count > 3)
+ throw new ArgumentException("Wrong number of elements in sequence", "seq");
+
+ octStr = (Asn1OctetString)seq[0];
+ iterationCount = (DerInteger)seq[1];
+
+ if (seq.Count > 2)
+ {
+ keyLength = (DerInteger)seq[2];
+ }
+ }
+
+ public Pbkdf2Params(
+ byte[] salt,
+ int iterationCount)
+ {
+ this.octStr = new DerOctetString(salt);
+ this.iterationCount = new DerInteger(iterationCount);
+ }
+
+ public Pbkdf2Params(
+ byte[] salt,
+ int iterationCount,
+ int keyLength)
+ : this(salt, iterationCount)
+ {
+ this.keyLength = new DerInteger(keyLength);
+ }
+
+ public byte[] GetSalt()
+ {
+ return octStr.GetOctets();
+ }
+
+ public BigInteger IterationCount
+ {
+ get { return iterationCount.Value; }
+ }
+
+ public BigInteger KeyLength
+ {
+ get { return keyLength == null ? null : keyLength.Value; }
+ }
+
+ public override Asn1Object ToAsn1Object()
+ {
+ Asn1EncodableVector v = new Asn1EncodableVector(
+ octStr, iterationCount);
+
+ if (keyLength != null)
+ {
+ v.Add(keyLength);
+ }
+
+ return new DerSequence(v);
+ }
+ }
+}
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