1 files changed, 0 insertions, 158 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/signers/ECGOST3410Signer.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/signers/ECGOST3410Signer.java
deleted file mode 100644
index b565e6806..000000000
--- a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/signers/ECGOST3410Signer.java
+++ /dev/null
@@ -1,158 +0,0 @@
-package org.spongycastle.crypto.signers;
-
-import org.spongycastle.crypto.CipherParameters;
-import org.spongycastle.crypto.DSA;
-import org.spongycastle.crypto.params.ECKeyParameters;
-import org.spongycastle.crypto.params.ECPrivateKeyParameters;
-import org.spongycastle.crypto.params.ECPublicKeyParameters;
-import org.spongycastle.crypto.params.ParametersWithRandom;
-import org.spongycastle.math.ec.ECAlgorithms;
-import org.spongycastle.math.ec.ECConstants;
-import org.spongycastle.math.ec.ECPoint;
-
-import java.math.BigInteger;
-import java.security.SecureRandom;
-
-/**
- * GOST R 34.10-2001 Signature Algorithm
- */
-public class ECGOST3410Signer
-    implements DSA
-{
-    ECKeyParameters key;
-
-    SecureRandom    random;
-
-    public void init(
-        boolean                 forSigning,
-        CipherParameters        param)
-    {
-        if (forSigning)
-        {
-            if (param instanceof ParametersWithRandom)
-            {
-                ParametersWithRandom    rParam = (ParametersWithRandom)param;
-
-                this.random = rParam.getRandom();
-                this.key = (ECPrivateKeyParameters)rParam.getParameters();
-            }
-            else
-            {
-                this.random = new SecureRandom();
-                this.key = (ECPrivateKeyParameters)param;
-            }
-        }
-        else
-        {
-            this.key = (ECPublicKeyParameters)param;
-        }
-    }
-
-    /**
-     * generate a signature for the given message using the key we were
-     * initialised with. For conventional GOST3410 the message should be a GOST3411
-     * hash of the message of interest.
-     *
-     * @param message the message that will be verified later.
-     */
-    public BigInteger[] generateSignature(
-        byte[] message)
-    {
-        byte[] mRev = new byte[message.length]; // conversion is little-endian
-        for (int i = 0; i != mRev.length; i++)
-        {
-            mRev[i] = message[mRev.length - 1 - i];
-        }
-        
-        BigInteger e = new BigInteger(1, mRev);
-        BigInteger n = key.getParameters().getN();
-
-        BigInteger r = null;
-        BigInteger s = null;
-
-        do // generate s
-        {
-            BigInteger k = null;
-
-            do // generate r
-            {
-                do
-                {
-                    k = new BigInteger(n.bitLength(), random);
-                }
-                while (k.equals(ECConstants.ZERO));
-
-                ECPoint p = key.getParameters().getG().multiply(k).normalize();
-
-                BigInteger x = p.getAffineXCoord().toBigInteger();
-
-                r = x.mod(n);
-            }
-            while (r.equals(ECConstants.ZERO));
-
-            BigInteger d = ((ECPrivateKeyParameters)key).getD();
-
-            s = (k.multiply(e)).add(d.multiply(r)).mod(n);
-        }
-        while (s.equals(ECConstants.ZERO));
-
-        BigInteger[]  res = new BigInteger[2];
-
-        res[0] = r;
-        res[1] = s;
-
-        return res;
-    }
-
-    /**
-     * return true if the value r and s represent a GOST3410 signature for
-     * the passed in message (for standard GOST3410 the message should be
-     * a GOST3411 hash of the real message to be verified).
-     */
-    public boolean verifySignature(
-        byte[]      message,
-        BigInteger  r,
-        BigInteger  s)
-    {
-        byte[] mRev = new byte[message.length]; // conversion is little-endian
-        for (int i = 0; i != mRev.length; i++)
-        {
-            mRev[i] = message[mRev.length - 1 - i];
-        }
-        
-        BigInteger e = new BigInteger(1, mRev);
-        BigInteger n = key.getParameters().getN();
-
-        // r in the range [1,n-1]
-        if (r.compareTo(ECConstants.ONE) < 0 || r.compareTo(n) >= 0)
-        {
-            return false;
-        }
-
-        // s in the range [1,n-1]
-        if (s.compareTo(ECConstants.ONE) < 0 || s.compareTo(n) >= 0)
-        {
-            return false;
-        }
-
-        BigInteger v = e.modInverse(n);
-
-        BigInteger z1 = s.multiply(v).mod(n);
-        BigInteger z2 = (n.subtract(r)).multiply(v).mod(n);
-
-        ECPoint G = key.getParameters().getG(); // P
-        ECPoint Q = ((ECPublicKeyParameters)key).getQ();
-
-        ECPoint point = ECAlgorithms.sumOfTwoMultiplies(G, z1, Q, z2).normalize();
-
-        // components must be bogus.
-        if (point.isInfinity())
-        {
-            return false;
-        }
-
-        BigInteger R = point.getAffineXCoord().toBigInteger().mod(n);
-
-        return R.equals(r);
-    }
-}