1 files changed, 0 insertions, 94 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/agreement/DHAgreement.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/agreement/DHAgreement.java
deleted file mode 100644
index 9dd5d0400..000000000
--- a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/agreement/DHAgreement.java
+++ /dev/null
@@ -1,94 +0,0 @@
-package org.spongycastle.crypto.agreement;
-
-import java.math.BigInteger;
-import java.security.SecureRandom;
-
-import org.spongycastle.crypto.AsymmetricCipherKeyPair;
-import org.spongycastle.crypto.CipherParameters;
-import org.spongycastle.crypto.generators.DHKeyPairGenerator;
-import org.spongycastle.crypto.params.DHKeyGenerationParameters;
-import org.spongycastle.crypto.params.DHParameters;
-import org.spongycastle.crypto.params.DHPublicKeyParameters;
-import org.spongycastle.crypto.params.DHPrivateKeyParameters;
-import org.spongycastle.crypto.params.AsymmetricKeyParameter;
-import org.spongycastle.crypto.params.ParametersWithRandom;
-
-/**
- * a Diffie-Hellman key exchange engine.
- * <p>
- * note: This uses MTI/A0 key agreement in order to make the key agreement
- * secure against passive attacks. If you're doing Diffie-Hellman and both
- * parties have long term public keys you should look at using this. For
- * further information have a look at RFC 2631.
- * <p>
- * It's possible to extend this to more than two parties as well, for the moment
- * that is left as an exercise for the reader.
- */
-public class DHAgreement
-{
-    private DHPrivateKeyParameters  key;
-    private DHParameters            dhParams;
-    private BigInteger              privateValue;
-    private SecureRandom            random;
-
-    public void init(
-        CipherParameters    param)
-    {
-        AsymmetricKeyParameter  kParam;
-
-        if (param instanceof ParametersWithRandom)
-        {
-            ParametersWithRandom    rParam = (ParametersWithRandom)param;
-
-            this.random = rParam.getRandom();
-            kParam = (AsymmetricKeyParameter)rParam.getParameters();
-        }
-        else
-        {
-            this.random = new SecureRandom();
-            kParam = (AsymmetricKeyParameter)param;
-        }
-
-        
-        if (!(kParam instanceof DHPrivateKeyParameters))
-        {
-            throw new IllegalArgumentException("DHEngine expects DHPrivateKeyParameters");
-        }
-
-        this.key = (DHPrivateKeyParameters)kParam;
-        this.dhParams = key.getParameters();
-    }
-
-    /**
-     * calculate our initial message.
-     */
-    public BigInteger calculateMessage()
-    {
-        DHKeyPairGenerator dhGen = new DHKeyPairGenerator();
-        dhGen.init(new DHKeyGenerationParameters(random, dhParams));
-        AsymmetricCipherKeyPair dhPair = dhGen.generateKeyPair();
-
-        this.privateValue = ((DHPrivateKeyParameters)dhPair.getPrivate()).getX();
-
-        return ((DHPublicKeyParameters)dhPair.getPublic()).getY();
-    }
-
-    /**
-     * given a message from a given party and the corresponding public key,
-     * calculate the next message in the agreement sequence. In this case
-     * this will represent the shared secret.
-     */
-    public BigInteger calculateAgreement(
-        DHPublicKeyParameters   pub,
-        BigInteger              message)
-    {
-        if (!pub.getParameters().equals(dhParams))
-        {
-            throw new IllegalArgumentException("Diffie-Hellman public key has wrong parameters.");
-        }
-
-        BigInteger p = dhParams.getP();
-
-        return message.modPow(key.getX(), p).multiply(pub.getY().modPow(privateValue, p)).mod(p);
-    }
-}