1 files changed, 56 insertions, 0 deletions
diff --git a/libraries/spongycastle/jce/src/main/java/javax/crypto/spec/DHGenParameterSpec.java b/libraries/spongycastle/jce/src/main/java/javax/crypto/spec/DHGenParameterSpec.java
new file mode 100644
index 000000000..56645d135
--- /dev/null
+++ b/libraries/spongycastle/jce/src/main/java/javax/crypto/spec/DHGenParameterSpec.java
@@ -0,0 +1,56 @@
+package javax.crypto.spec;
+
+import java.security.spec.AlgorithmParameterSpec;
+
+/**
+ * This class specifies the set of parameters used for generating
+ * Diffie-Hellman (system) parameters for use in Diffie-Hellman key
+ * agreement. This is typically done by a central
+ * authority.
+ * <p>
+ * The central authority, after computing the parameters, must send this
+ * information to the parties looking to agree on a secret key.
+ */
+public class DHGenParameterSpec
+    implements AlgorithmParameterSpec
+{
+    private int primeSize;
+    private int exponentSize;
+
+    /**
+     * Constructs a parameter set for the generation of Diffie-Hellman
+     * (system) parameters. The constructed parameter set can be used to
+     * initialize an <a href="http://java.sun.com/products/jdk/1.2/docs/api/java.security.AlgorithmParameterGenerator.html"><code>AlgorithmParameterGenerator</code></a>
+     * object for the generation of Diffie-Hellman parameters.
+     *
+     * @param primeSize the size (in bits) of the prime modulus.
+     * @param exponentSize the size (in bits) of the random exponent.
+     */
+    public DHGenParameterSpec(
+        int     primeSize,
+        int     exponentSize)
+    {
+        this.primeSize = primeSize;
+        this.exponentSize = exponentSize;
+    }
+
+    /**
+     * Returns the size in bits of the prime modulus.
+     *
+     * @return the size in bits of the prime modulus
+     */
+    public int getPrimeSize()
+    {
+        return primeSize;
+    }
+
+    /**
+     * Returns the size in bits of the random exponent (private value).
+     *
+     * @return the size in bits of the random exponent (private value)
+     */
+    public int getExponentSize()
+    {
+        return exponentSize;
+    }
+}