1 files changed, 96 insertions, 0 deletions
diff --git a/Crypto/src/asn1/pkcs/MacData.cs b/Crypto/src/asn1/pkcs/MacData.cs
new file mode 100644
index 000000000..780b24153
--- /dev/null
+++ b/Crypto/src/asn1/pkcs/MacData.cs
@@ -0,0 +1,96 @@
+using System;
+
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Math;
+
+namespace Org.BouncyCastle.Asn1.Pkcs
+{
+ public class MacData
+ : Asn1Encodable
+ {
+ internal DigestInfo digInfo;
+ internal byte[] salt;
+ internal BigInteger iterationCount;
+
+ public static MacData GetInstance(
+ object obj)
+ {
+ if (obj is MacData)
+ {
+ return (MacData) obj;
+ }
+
+ if (obj is Asn1Sequence)
+ {
+ return new MacData((Asn1Sequence) obj);
+ }
+
+ throw new ArgumentException("Unknown object in factory: " + obj.GetType().FullName, "obj");
+ }
+
+ private MacData(
+ Asn1Sequence seq)
+ {
+ this.digInfo = DigestInfo.GetInstance(seq[0]);
+ this.salt = ((Asn1OctetString) seq[1]).GetOctets();
+
+ if (seq.Count == 3)
+ {
+ this.iterationCount = ((DerInteger) seq[2]).Value;
+ }
+ else
+ {
+ this.iterationCount = BigInteger.One;
+ }
+ }
+
+ public MacData(
+ DigestInfo digInfo,
+ byte[] salt,
+ int iterationCount)
+ {
+ this.digInfo = digInfo;
+ this.salt = (byte[]) salt.Clone();
+ this.iterationCount = BigInteger.ValueOf(iterationCount);
+ }
+
+ public DigestInfo Mac
+ {
+ get { return digInfo; }
+ }
+
+ public byte[] GetSalt()
+ {
+ return (byte[]) salt.Clone();
+ }
+
+ public BigInteger IterationCount
+ {
+ get { return iterationCount; }
+ }
+
+ /**
+ * <pre>
+ * MacData ::= SEQUENCE {
+ * mac DigestInfo,
+ * macSalt OCTET STRING,
+ * iterations INTEGER DEFAULT 1
+ * -- Note: The default is for historic reasons and its use is deprecated. A
+ * -- higher value, like 1024 is recommended.
+ * </pre>
+ * @return the basic DERObject construction.
+ */
+ public override Asn1Object ToAsn1Object()
+ {
+ Asn1EncodableVector v = new Asn1EncodableVector(digInfo, new DerOctetString(salt));
+
+ if (!iterationCount.Equals(BigInteger.One))
+ {
+ v.Add(new DerInteger(iterationCount));
+ }
+
+ return new DerSequence(v);
+ }
+ }
+}
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