1 files changed, 21 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/generators/DSTU4145KeyPairGenerator.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/generators/DSTU4145KeyPairGenerator.java
new file mode 100644
index 000000000..47740485d
--- /dev/null
+++ b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/generators/DSTU4145KeyPairGenerator.java
@@ -0,0 +1,21 @@
+package org.spongycastle.crypto.generators;
+
+import org.spongycastle.crypto.AsymmetricCipherKeyPair;
+import org.spongycastle.crypto.params.ECPrivateKeyParameters;
+import org.spongycastle.crypto.params.ECPublicKeyParameters;
+
+public class DSTU4145KeyPairGenerator
+    extends ECKeyPairGenerator
+{
+    public AsymmetricCipherKeyPair generateKeyPair()
+    {
+        AsymmetricCipherKeyPair pair = super.generateKeyPair();
+
+        ECPublicKeyParameters pub = (ECPublicKeyParameters)pair.getPublic();
+        ECPrivateKeyParameters priv = (ECPrivateKeyParameters)pair.getPrivate();
+
+        pub = new ECPublicKeyParameters(pub.getQ().negate(), pub.getParameters());
+
+        return new AsymmetricCipherKeyPair(pub, priv);
+    }
+}