1 files changed, 0 insertions, 105 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/tls/TlsDHUtils.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/tls/TlsDHUtils.java
deleted file mode 100644
index 9a7a22184..000000000
--- a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/tls/TlsDHUtils.java
+++ /dev/null
@@ -1,105 +0,0 @@
-package org.spongycastle.crypto.tls;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.math.BigInteger;
-import java.security.SecureRandom;
-
-import org.spongycastle.crypto.AsymmetricCipherKeyPair;
-import org.spongycastle.crypto.agreement.DHBasicAgreement;
-import org.spongycastle.crypto.generators.DHBasicKeyPairGenerator;
-import org.spongycastle.crypto.params.DHKeyGenerationParameters;
-import org.spongycastle.crypto.params.DHParameters;
-import org.spongycastle.crypto.params.DHPrivateKeyParameters;
-import org.spongycastle.crypto.params.DHPublicKeyParameters;
-import org.spongycastle.util.BigIntegers;
-
-public class TlsDHUtils
-{
-    static final BigInteger ONE = BigInteger.valueOf(1);
-    static final BigInteger TWO = BigInteger.valueOf(2);
-
-    public static boolean areCompatibleParameters(DHParameters a, DHParameters b)
-    {
-        return a.getP().equals(b.getP()) && a.getG().equals(b.getG());
-    }
-
-    public static byte[] calculateDHBasicAgreement(DHPublicKeyParameters publicKey, DHPrivateKeyParameters privateKey)
-    {
-        DHBasicAgreement basicAgreement = new DHBasicAgreement();
-        basicAgreement.init(privateKey);
-        BigInteger agreementValue = basicAgreement.calculateAgreement(publicKey);
-
-        /*
-         * RFC 5246 8.1.2. Leading bytes of Z that contain all zero bits are stripped before it is
-         * used as the pre_master_secret.
-         */
-        return BigIntegers.asUnsignedByteArray(agreementValue);
-    }
-
-    public static AsymmetricCipherKeyPair generateDHKeyPair(SecureRandom random, DHParameters dhParams)
-    {
-        DHBasicKeyPairGenerator dhGen = new DHBasicKeyPairGenerator();
-        dhGen.init(new DHKeyGenerationParameters(random, dhParams));
-        return dhGen.generateKeyPair();
-    }
-
-    public static DHPrivateKeyParameters generateEphemeralClientKeyExchange(SecureRandom random, DHParameters dhParams,
-        OutputStream output) throws IOException
-    {
-        AsymmetricCipherKeyPair kp = generateDHKeyPair(random, dhParams);
-
-        DHPublicKeyParameters dh_public = (DHPublicKeyParameters) kp.getPublic();
-        writeDHParameter(dh_public.getY(), output);
-
-        return (DHPrivateKeyParameters) kp.getPrivate();
-    }
-
-    public static DHPrivateKeyParameters generateEphemeralServerKeyExchange(SecureRandom random, DHParameters dhParams,
-        OutputStream output) throws IOException
-    {
-        AsymmetricCipherKeyPair kp = TlsDHUtils.generateDHKeyPair(random, dhParams);
-
-        DHPublicKeyParameters dhPublicKey = (DHPublicKeyParameters)kp.getPublic();
-        ServerDHParams params = new ServerDHParams(dhPublicKey);
-        params.encode(output);
-
-        return (DHPrivateKeyParameters)kp.getPrivate();
-    }
-
-    public static DHPublicKeyParameters validateDHPublicKey(DHPublicKeyParameters key) throws IOException
-    {
-        BigInteger Y = key.getY();
-        DHParameters params = key.getParameters();
-        BigInteger p = params.getP();
-        BigInteger g = params.getG();
-
-        if (!p.isProbablePrime(2))
-        {
-            throw new TlsFatalAlert(AlertDescription.illegal_parameter);
-        }
-        if (g.compareTo(TWO) < 0 || g.compareTo(p.subtract(TWO)) > 0)
-        {
-            throw new TlsFatalAlert(AlertDescription.illegal_parameter);
-        }
-        if (Y.compareTo(TWO) < 0 || Y.compareTo(p.subtract(ONE)) > 0)
-        {
-            throw new TlsFatalAlert(AlertDescription.illegal_parameter);
-        }
-
-        // TODO See RFC 2631 for more discussion of Diffie-Hellman validation
-
-        return key;
-    }
-
-    public static BigInteger readDHParameter(InputStream input) throws IOException
-    {
-        return new BigInteger(1, TlsUtils.readOpaque16(input));
-    }
-
-    public static void writeDHParameter(BigInteger x, OutputStream output) throws IOException
-    {
-        TlsUtils.writeOpaque16(BigIntegers.asUnsignedByteArray(x), output);
-    }
-}