1 files changed, 0 insertions, 54 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/agreement/ECDHBasicAgreement.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/agreement/ECDHBasicAgreement.java
deleted file mode 100644
index 535597603..000000000
--- a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/agreement/ECDHBasicAgreement.java
+++ /dev/null
@@ -1,54 +0,0 @@
-package org.spongycastle.crypto.agreement;
-
-import java.math.BigInteger;
-
-import org.spongycastle.crypto.BasicAgreement;
-import org.spongycastle.crypto.CipherParameters;
-import org.spongycastle.crypto.params.ECPrivateKeyParameters;
-import org.spongycastle.crypto.params.ECPublicKeyParameters;
-import org.spongycastle.math.ec.ECPoint;
-
-/**
- * P1363 7.2.1 ECSVDP-DH
- *
- * ECSVDP-DH is Elliptic Curve Secret Value Derivation Primitive,
- * Diffie-Hellman version. It is based on the work of [DH76], [Mil86],
- * and [Kob87]. This primitive derives a shared secret value from one
- * party's private key and another party's public key, where both have
- * the same set of EC domain parameters. If two parties correctly
- * execute this primitive, they will produce the same output. This
- * primitive can be invoked by a scheme to derive a shared secret key;
- * specifically, it may be used with the schemes ECKAS-DH1 and
- * DL/ECKAS-DH2. It assumes that the input keys are valid (see also
- * Section 7.2.2).
- */
-public class ECDHBasicAgreement
-    implements BasicAgreement
-{
-    private ECPrivateKeyParameters key;
-
-    public void init(
-        CipherParameters key)
-    {
-        this.key = (ECPrivateKeyParameters)key;
-    }
-
-    public int getFieldSize()
-    {
-        return (key.getParameters().getCurve().getFieldSize() + 7) / 8;
-    }
-
-    public BigInteger calculateAgreement(
-        CipherParameters pubKey)
-    {
-        ECPublicKeyParameters pub = (ECPublicKeyParameters)pubKey;
-        ECPoint P = pub.getQ().multiply(key.getD()).normalize();
-
-        if (P.isInfinity())
-        {
-            throw new IllegalStateException("Infinity is not a valid agreement value for ECDH");
-        }
-
-        return P.getAffineXCoord().toBigInteger();
-    }
-}