1 files changed, 61 insertions, 0 deletions
diff --git a/libraries/spongycastle/prov/src/main/java/org/spongycastle/jce/ECGOST3410NamedCurveTable.java b/libraries/spongycastle/prov/src/main/java/org/spongycastle/jce/ECGOST3410NamedCurveTable.java
new file mode 100644
index 000000000..49c525ad7
--- /dev/null
+++ b/libraries/spongycastle/prov/src/main/java/org/spongycastle/jce/ECGOST3410NamedCurveTable.java
@@ -0,0 +1,61 @@
+package org.spongycastle.jce;
+
+import java.util.Enumeration;
+
+import org.spongycastle.asn1.ASN1ObjectIdentifier;
+import org.spongycastle.asn1.cryptopro.ECGOST3410NamedCurves;
+import org.spongycastle.crypto.params.ECDomainParameters;
+import org.spongycastle.jce.spec.ECNamedCurveParameterSpec;
+
+/**
+ * a table of locally supported named curves.
+ */
+public class ECGOST3410NamedCurveTable
+{
+    /**
+     * return a parameter spec representing the passed in named
+     * curve. The routine returns null if the curve is not present.
+     * 
+     * @param name the name of the curve requested
+     * @return a parameter spec for the curve, null if it is not available.
+     */
+    public static ECNamedCurveParameterSpec getParameterSpec(
+        String  name)
+    {
+        ECDomainParameters  ecP = ECGOST3410NamedCurves.getByName(name);
+        if (ecP == null)
+        {
+            try
+            {
+                ecP = ECGOST3410NamedCurves.getByOID(new ASN1ObjectIdentifier(name));
+            }
+            catch (IllegalArgumentException e)
+            {
+                return null; // not an oid.
+            }
+        }
+        
+        if (ecP == null)
+        {
+            return null;
+        }
+
+        return new ECNamedCurveParameterSpec(
+                                        name,
+                                        ecP.getCurve(),
+                                        ecP.getG(),
+                                        ecP.getN(),
+                                        ecP.getH(),
+                                        ecP.getSeed());
+    }
+
+    /**
+     * return an enumeration of the names of the available curves.
+     *
+     * @return an enumeration of the names of the available curves.
+     */
+    public static Enumeration getNames()
+    {
+        return ECGOST3410NamedCurves.getNames();
+    }
+}