1 files changed, 47 insertions, 0 deletions
diff --git a/libraries/spongycastle/prov/src/main/java/org/spongycastle/pqc/jcajce/provider/mceliece/McElieceKeysToParams.java b/libraries/spongycastle/prov/src/main/java/org/spongycastle/pqc/jcajce/provider/mceliece/McElieceKeysToParams.java
new file mode 100644
index 000000000..649d1d458
--- /dev/null
+++ b/libraries/spongycastle/prov/src/main/java/org/spongycastle/pqc/jcajce/provider/mceliece/McElieceKeysToParams.java
@@ -0,0 +1,47 @@
+package org.spongycastle.pqc.jcajce.provider.mceliece;
+
+import java.security.InvalidKeyException;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+
+import org.spongycastle.crypto.params.AsymmetricKeyParameter;
+import org.spongycastle.pqc.crypto.mceliece.McEliecePrivateKeyParameters;
+import org.spongycastle.pqc.crypto.mceliece.McEliecePublicKeyParameters;
+
+/**
+ * utility class for converting jce/jca McEliece objects
+ * objects into their org.spongycastle.crypto counterparts.
+ */
+public class McElieceKeysToParams
+{
+
+
+    static public AsymmetricKeyParameter generatePublicKeyParameter(
+        PublicKey key)
+        throws InvalidKeyException
+    {
+        if (key instanceof BCMcEliecePublicKey)
+        {
+            BCMcEliecePublicKey k = (BCMcEliecePublicKey)key;
+
+            return new McEliecePublicKeyParameters(k.getOIDString(), k.getN(), k.getT(), k.getG(), k.getMcElieceParameters());
+        }
+
+        throw new InvalidKeyException("can't identify McEliece public key: " + key.getClass().getName());
+    }
+
+
+    static public AsymmetricKeyParameter generatePrivateKeyParameter(
+        PrivateKey key)
+        throws InvalidKeyException
+    {
+        if (key instanceof BCMcEliecePrivateKey)
+        {
+            BCMcEliecePrivateKey k = (BCMcEliecePrivateKey)key;
+            return new McEliecePrivateKeyParameters(k.getOIDString(), k.getN(), k.getK(), k.getField(), k.getGoppaPoly(),
+                k.getSInv(), k.getP1(), k.getP2(), k.getH(), k.getQInv(), k.getMcElieceParameters());
+        }
+
+        throw new InvalidKeyException("can't identify McEliece private key.");
+    }
+}