1 files changed, 50 insertions, 0 deletions
diff --git a/core/src/main/java/org/spongycastle/crypto/params/NaccacheSternPrivateKeyParameters.java b/core/src/main/java/org/spongycastle/crypto/params/NaccacheSternPrivateKeyParameters.java
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--- /dev/null
+++ b/core/src/main/java/org/spongycastle/crypto/params/NaccacheSternPrivateKeyParameters.java
@@ -0,0 +1,50 @@
+package org.spongycastle.crypto.params;
+
+import java.math.BigInteger;
+import java.util.Vector;
+
+/**
+ * Private key parameters for NaccacheStern cipher. For details on this cipher,
+ * please see
+ * 
+ * http://www.gemplus.com/smart/rd/publications/pdf/NS98pkcs.pdf
+ */
+public class NaccacheSternPrivateKeyParameters extends NaccacheSternKeyParameters 
+{
+    private BigInteger phi_n;
+    private Vector     smallPrimes;
+
+    /**
+     * Constructs a NaccacheSternPrivateKey
+     * 
+     * @param g
+     *            the public enryption parameter g
+     * @param n
+     *            the public modulus n = p*q
+     * @param lowerSigmaBound
+     *            the public lower sigma bound up to which data can be encrypted
+     * @param smallPrimes
+     *            the small primes, of which sigma is constructed in the right
+     *            order
+     * @param phi_n
+     *            the private modulus phi(n) = (p-1)(q-1)
+     */
+    public NaccacheSternPrivateKeyParameters(BigInteger g, BigInteger n,
+            int lowerSigmaBound, Vector smallPrimes,
+            BigInteger phi_n)
+    {
+        super(true, g, n, lowerSigmaBound);
+        this.smallPrimes = smallPrimes;
+        this.phi_n = phi_n;
+    }
+
+    public BigInteger getPhi_n()
+    {
+        return phi_n;
+    }
+
+    public Vector getSmallPrimes()
+    {
+        return smallPrimes;
+    }
+}