1 files changed, 51 insertions, 0 deletions
diff --git a/crypto/src/crypto/tls/DtlsEpoch.cs b/crypto/src/crypto/tls/DtlsEpoch.cs
new file mode 100644
index 000000000..91fffa5e1
--- /dev/null
+++ b/crypto/src/crypto/tls/DtlsEpoch.cs
@@ -0,0 +1,51 @@
+using System;
+
+namespace Org.BouncyCastle.Crypto.Tls
+{
+ internal class DtlsEpoch
+ {
+ private readonly DtlsReplayWindow mReplayWindow = new DtlsReplayWindow();
+
+ private readonly int mEpoch;
+ private readonly TlsCipher mCipher;
+
+ private long mSequenceNumber = 0;
+
+ internal DtlsEpoch(int epoch, TlsCipher cipher)
+ {
+ if (epoch < 0)
+ throw new ArgumentException("must be >= 0", "epoch");
+ if (cipher == null)
+ throw new ArgumentNullException("cipher");
+
+ this.mEpoch = epoch;
+ this.mCipher = cipher;
+ }
+
+ internal long AllocateSequenceNumber()
+ {
+ // TODO Check for overflow
+ return mSequenceNumber++;
+ }
+
+ internal TlsCipher Cipher
+ {
+ get { return mCipher; }
+ }
+
+ internal int Epoch
+ {
+ get { return mEpoch; }
+ }
+
+ internal DtlsReplayWindow ReplayWindow
+ {
+ get { return mReplayWindow; }
+ }
+
+ internal long SequenceNumber
+ {
+ get { return mSequenceNumber; }
+ }
+ }
+}
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