1 files changed, 72 insertions, 0 deletions
diff --git a/bcprov/src/main/java/org/bouncycastle/jcajce/provider/asymmetric/dsa/AlgorithmParameterGeneratorSpi.java b/bcprov/src/main/java/org/bouncycastle/jcajce/provider/asymmetric/dsa/AlgorithmParameterGeneratorSpi.java
new file mode 100644
index 0000000..2e5ee56
--- /dev/null
+++ b/bcprov/src/main/java/org/bouncycastle/jcajce/provider/asymmetric/dsa/AlgorithmParameterGeneratorSpi.java
@@ -0,0 +1,72 @@
+package org.bouncycastle.jcajce.provider.asymmetric.dsa;
+
+import java.security.AlgorithmParameters;
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidParameterException;
+import java.security.SecureRandom;
+import java.security.spec.AlgorithmParameterSpec;
+import java.security.spec.DSAParameterSpec;
+
+import org.bouncycastle.crypto.generators.DSAParametersGenerator;
+import org.bouncycastle.crypto.params.DSAParameters;
+import org.bouncycastle.jce.provider.BouncyCastleProvider;
+//import org.bouncycastle.jce.spec.GOST3410ParameterSpec;
+//import org.bouncycastle.jce.spec.GOST3410PublicKeyParameterSetSpec;
+
+public class AlgorithmParameterGeneratorSpi
+    extends java.security.AlgorithmParameterGeneratorSpi
+{
+    protected SecureRandom random;
+    protected int strength = 1024;
+
+    protected void engineInit(
+        int strength,
+        SecureRandom random)
+    {
+        if (strength < 512 || strength > 1024 || strength % 64 != 0)
+        {
+            throw new InvalidParameterException("strength must be from 512 - 1024 and a multiple of 64");
+        }
+
+        this.strength = strength;
+        this.random = random;
+    }
+
+    protected void engineInit(
+        AlgorithmParameterSpec genParamSpec,
+        SecureRandom random)
+        throws InvalidAlgorithmParameterException
+    {
+        throw new InvalidAlgorithmParameterException("No supported AlgorithmParameterSpec for DSA parameter generation.");
+    }
+
+    protected AlgorithmParameters engineGenerateParameters()
+    {
+        DSAParametersGenerator pGen = new DSAParametersGenerator();
+
+        if (random != null)
+        {
+            pGen.init(strength, 20, random);
+        }
+        else
+        {
+            pGen.init(strength, 20, new SecureRandom());
+        }
+
+        DSAParameters p = pGen.generateParameters();
+
+        AlgorithmParameters params;
+
+        try
+        {
+            params = AlgorithmParameters.getInstance("DSA", BouncyCastleProvider.PROVIDER_NAME);
+            params.init(new DSAParameterSpec(p.getP(), p.getQ(), p.getG()));
+        }
+        catch (Exception e)
+        {
+            throw new RuntimeException(e.getMessage());
+        }
+
+        return params;
+    }
+}