1 files changed, 65 insertions, 0 deletions
diff --git a/libraries/spongycastle/prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/gost/AlgorithmParameterGeneratorSpi.java b/libraries/spongycastle/prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/gost/AlgorithmParameterGeneratorSpi.java
new file mode 100644
index 000000000..0cf5908ac
--- /dev/null
+++ b/libraries/spongycastle/prov/src/main/java/org/spongycastle/jcajce/provider/asymmetric/gost/AlgorithmParameterGeneratorSpi.java
@@ -0,0 +1,65 @@
+package org.spongycastle.jcajce.provider.asymmetric.gost;
+
+import java.security.AlgorithmParameters;
+import java.security.InvalidAlgorithmParameterException;
+import java.security.SecureRandom;
+import java.security.spec.AlgorithmParameterSpec;
+
+import org.spongycastle.crypto.generators.GOST3410ParametersGenerator;
+import org.spongycastle.crypto.params.GOST3410Parameters;
+import org.spongycastle.jce.provider.BouncyCastleProvider;
+import org.spongycastle.jce.spec.GOST3410ParameterSpec;
+import org.spongycastle.jce.spec.GOST3410PublicKeyParameterSetSpec;
+
+public abstract class AlgorithmParameterGeneratorSpi
+    extends java.security.AlgorithmParameterGeneratorSpi
+{
+    protected SecureRandom random;
+    protected int strength = 1024;
+
+    protected void engineInit(
+        int strength,
+        SecureRandom random)
+    {
+        this.strength = strength;
+        this.random = random;
+    }
+
+    protected void engineInit(
+        AlgorithmParameterSpec genParamSpec,
+        SecureRandom random)
+        throws InvalidAlgorithmParameterException
+    {
+        throw new InvalidAlgorithmParameterException("No supported AlgorithmParameterSpec for GOST3410 parameter generation.");
+    }
+
+    protected AlgorithmParameters engineGenerateParameters()
+    {
+        GOST3410ParametersGenerator pGen = new GOST3410ParametersGenerator();
+
+        if (random != null)
+        {
+            pGen.init(strength, 2, random);
+        }
+        else
+        {
+            pGen.init(strength, 2, new SecureRandom());
+        }
+
+        GOST3410Parameters p = pGen.generateParameters();
+
+        AlgorithmParameters params;
+
+        try
+        {
+            params = AlgorithmParameters.getInstance("GOST3410", BouncyCastleProvider.PROVIDER_NAME);
+            params.init(new GOST3410ParameterSpec(new GOST3410PublicKeyParameterSetSpec(p.getP(), p.getQ(), p.getA())));
+        }
+        catch (Exception e)
+        {
+            throw new RuntimeException(e.getMessage());
+        }
+
+        return params;
+    }
+}