1 files changed, 0 insertions, 71 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/agreement/DHBasicAgreement.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/agreement/DHBasicAgreement.java
deleted file mode 100644
index 6359ecdbd..000000000
--- a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/agreement/DHBasicAgreement.java
+++ /dev/null
@@ -1,71 +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.AsymmetricKeyParameter;
-import org.spongycastle.crypto.params.DHParameters;
-import org.spongycastle.crypto.params.DHPrivateKeyParameters;
-import org.spongycastle.crypto.params.DHPublicKeyParameters;
-import org.spongycastle.crypto.params.ParametersWithRandom;
-
-/**
- * a Diffie-Hellman key agreement class.
- * <p>
- * note: This is only the basic algorithm, it doesn't take advantage of
- * long term public keys if they are available. See the DHAgreement class
- * for a "better" implementation.
- */
-public class DHBasicAgreement
-    implements BasicAgreement
-{
-    private DHPrivateKeyParameters  key;
-    private DHParameters            dhParams;
-
-    public void init(
-        CipherParameters    param)
-    {
-        AsymmetricKeyParameter  kParam;
-
-        if (param instanceof ParametersWithRandom)
-        {
-            ParametersWithRandom rParam = (ParametersWithRandom)param;
-            kParam = (AsymmetricKeyParameter)rParam.getParameters();
-        }
-        else
-        {
-            kParam = (AsymmetricKeyParameter)param;
-        }
-
-        if (!(kParam instanceof DHPrivateKeyParameters))
-        {
-            throw new IllegalArgumentException("DHEngine expects DHPrivateKeyParameters");
-        }
-
-        this.key = (DHPrivateKeyParameters)kParam;
-        this.dhParams = key.getParameters();
-    }
-
-    public int getFieldSize()
-    {
-        return (key.getParameters().getP().bitLength() + 7) / 8;
-    }
-
-    /**
-     * given a short term public key from a given party calculate the next
-     * message in the agreement sequence. 
-     */
-    public BigInteger calculateAgreement(
-        CipherParameters   pubKey)
-    {
-        DHPublicKeyParameters   pub = (DHPublicKeyParameters)pubKey;
-
-        if (!pub.getParameters().equals(dhParams))
-        {
-            throw new IllegalArgumentException("Diffie-Hellman public key has wrong parameters.");
-        }
-
-        return pub.getY().modPow(key.getX(), dhParams.getP());
-    }
-}