1 files changed, 52 insertions, 0 deletions
diff --git a/bcprov/src/main/java/org/bouncycastle/crypto/params/KDFCounterParameters.java b/bcprov/src/main/java/org/bouncycastle/crypto/params/KDFCounterParameters.java
new file mode 100644
index 0000000..0eb6cb7
--- /dev/null
+++ b/bcprov/src/main/java/org/bouncycastle/crypto/params/KDFCounterParameters.java
@@ -0,0 +1,52 @@
+package org.bouncycastle.crypto.params;
+
+import org.bouncycastle.crypto.DerivationParameters;
+import org.bouncycastle.util.Arrays;
+
+public final class KDFCounterParameters
+    implements DerivationParameters
+{
+
+    private final byte[] ki;
+    private final byte[] fixedInputData;
+    private final int r;
+
+    public KDFCounterParameters(byte[] ki, byte[] fixedInputData, int r)
+    {
+        if (ki == null)
+        {
+            throw new IllegalArgumentException("A KDF requires Ki (a seed) as input");
+        }
+        this.ki = Arrays.clone(ki);
+
+        if (fixedInputData == null)
+        {
+            this.fixedInputData = new byte[0];
+        }
+        else
+        {
+            this.fixedInputData = Arrays.clone(fixedInputData);
+        }
+
+        if (r != 8 && r != 16 && r != 24 && r != 32)
+        {
+            throw new IllegalArgumentException("Length of counter should be 8, 16, 24 or 32");
+        }
+        this.r = r;
+    }
+
+    public byte[] getKI()
+    {
+        return ki;
+    }
+
+    public byte[] getFixedInputData()
+    {
+        return Arrays.clone(fixedInputData);
+    }
+
+    public int getR()
+    {
+        return r;
+    }
+}