1 files changed, 0 insertions, 255 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/kems/ECIESKeyEncapsulation.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/kems/ECIESKeyEncapsulation.java
deleted file mode 100755
index bfe8c1077..000000000
--- a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/kems/ECIESKeyEncapsulation.java
+++ /dev/null
@@ -1,255 +0,0 @@
-package org.spongycastle.crypto.kems;
-
-import java.math.BigInteger;
-import java.security.SecureRandom;
-
-import org.spongycastle.crypto.CipherParameters;
-import org.spongycastle.crypto.DerivationFunction;
-import org.spongycastle.crypto.KeyEncapsulation;
-import org.spongycastle.crypto.params.ECDomainParameters;
-import org.spongycastle.crypto.params.ECKeyParameters;
-import org.spongycastle.crypto.params.ECPrivateKeyParameters;
-import org.spongycastle.crypto.params.ECPublicKeyParameters;
-import org.spongycastle.crypto.params.KDFParameters;
-import org.spongycastle.crypto.params.KeyParameter;
-import org.spongycastle.math.ec.ECCurve;
-import org.spongycastle.math.ec.ECPoint;
-import org.spongycastle.util.BigIntegers;
-
-/**
- * The ECIES Key Encapsulation Mechanism (ECIES-KEM) from ISO 18033-2.
- */
-public class ECIESKeyEncapsulation
-    implements KeyEncapsulation
-{
-    private static final BigInteger ONE = BigInteger.valueOf(1);
-
-    private DerivationFunction kdf;
-    private SecureRandom rnd;
-    private ECKeyParameters key;
-    private boolean CofactorMode;
-    private boolean OldCofactorMode;
-    private boolean SingleHashMode;
-
-    /**
-     * Set up the ECIES-KEM.
-     *
-     * @param kdf the key derivation function to be used.
-     * @param rnd the random source for the session key.
-     */
-    public ECIESKeyEncapsulation(
-        DerivationFunction kdf,
-        SecureRandom rnd)
-    {
-        this.kdf = kdf;
-        this.rnd = rnd;
-        this.CofactorMode = false;
-        this.OldCofactorMode = false;
-        this.SingleHashMode = false;
-    }
-
-    /**
-     * Set up the ECIES-KEM.
-     *
-     * @param kdf             the key derivation function to be used.
-     * @param rnd             the random source for the session key.
-     * @param cofactorMode    true to use the new cofactor ECDH.
-     * @param oldCofactorMode true to use the old cofactor ECDH.
-     * @param singleHashMode  true to use single hash mode.
-     */
-    public ECIESKeyEncapsulation(
-        DerivationFunction kdf,
-        SecureRandom rnd,
-        boolean cofactorMode,
-        boolean oldCofactorMode,
-        boolean singleHashMode)
-    {
-        this.kdf = kdf;
-        this.rnd = rnd;
-
-        // If both cofactorMode and oldCofactorMode are set to true
-        // then the implementation will use the new cofactor ECDH 
-        this.CofactorMode = cofactorMode;
-        this.OldCofactorMode = oldCofactorMode;
-        this.SingleHashMode = singleHashMode;
-    }
-
-    /**
-     * Initialise the ECIES-KEM.
-     *
-     * @param key the recipient's public (for encryption) or private (for decryption) key.
-     */
-    public void init(CipherParameters key)
-        throws IllegalArgumentException
-    {
-        if (!(key instanceof ECKeyParameters))
-        {
-            throw new IllegalArgumentException("EC key required");
-        }
-        else
-        {
-            this.key = (ECKeyParameters)key;
-        }
-    }
-
-    /**
-     * Generate and encapsulate a random session key.
-     *
-     * @param out    the output buffer for the encapsulated key.
-     * @param outOff the offset for the output buffer.
-     * @param keyLen the length of the session key.
-     * @return the random session key.
-     */
-    public CipherParameters encrypt(byte[] out, int outOff, int keyLen)
-        throws IllegalArgumentException
-    {
-        if (!(key instanceof ECPublicKeyParameters))
-        {
-            throw new IllegalArgumentException("Public key required for encryption");
-        }
-
-        ECPublicKeyParameters ecPubKey = (ECPublicKeyParameters)key;
-        ECDomainParameters ecParams = ecPubKey.getParameters();
-        ECCurve curve = ecParams.getCurve();
-        BigInteger n = ecParams.getN();
-        BigInteger h = ecParams.getH();
-
-        // Generate the ephemeral key pair    
-        BigInteger r = BigIntegers.createRandomInRange(ONE, n, rnd);
-
-        // Compute the static-ephemeral key agreement
-        BigInteger rPrime = CofactorMode ? r.multiply(h).mod(n) : r;
-
-        ECPoint[] ghTilde = new ECPoint[]{ 
-            ecParams.getG().multiply(r),
-            ecPubKey.getQ().multiply(rPrime)
-        };
-
-        // NOTE: More efficient than normalizing each individually
-        curve.normalizeAll(ghTilde);
-
-        ECPoint gTilde = ghTilde[0], hTilde = ghTilde[1];
-
-        // Encode the ephemeral public key
-        byte[] C = gTilde.getEncoded();
-        System.arraycopy(C, 0, out, outOff, C.length);
-
-        // Encode the shared secret value
-        byte[] PEH = hTilde.getAffineXCoord().getEncoded();
-
-        // Initialise the KDF
-        byte[] kdfInput;
-        if (SingleHashMode)
-        {
-            kdfInput = new byte[C.length + PEH.length];
-            System.arraycopy(C, 0, kdfInput, 0, C.length);
-            System.arraycopy(PEH, 0, kdfInput, C.length, PEH.length);
-        }
-        else
-        {
-            kdfInput = PEH;
-        }
-
-        kdf.init(new KDFParameters(kdfInput, null));
-
-        // Generate the secret key
-        byte[] K = new byte[keyLen];
-        kdf.generateBytes(K, 0, K.length);
-
-        // Return the ciphertext
-        return new KeyParameter(K);
-    }
-
-    /**
-     * Generate and encapsulate a random session key.
-     *
-     * @param out    the output buffer for the encapsulated key.
-     * @param keyLen the length of the session key.
-     * @return the random session key.
-     */
-    public CipherParameters encrypt(byte[] out, int keyLen)
-    {
-        return encrypt(out, 0, keyLen);
-    }
-
-    /**
-     * Decrypt an encapsulated session key.
-     *
-     * @param in     the input buffer for the encapsulated key.
-     * @param inOff  the offset for the input buffer.
-     * @param inLen  the length of the encapsulated key.
-     * @param keyLen the length of the session key.
-     * @return the session key.
-     */
-    public CipherParameters decrypt(byte[] in, int inOff, int inLen, int keyLen)
-        throws IllegalArgumentException
-    {
-        if (!(key instanceof ECPrivateKeyParameters))
-        {
-            throw new IllegalArgumentException("Private key required for encryption");
-        }
-
-        ECPrivateKeyParameters ecPrivKey = (ECPrivateKeyParameters)key;
-        ECDomainParameters ecParams = ecPrivKey.getParameters();
-        ECCurve curve = ecParams.getCurve();
-        BigInteger n = ecParams.getN();
-        BigInteger h = ecParams.getH();
-
-        // Decode the ephemeral public key
-        byte[] C = new byte[inLen];
-        System.arraycopy(in, inOff, C, 0, inLen);
-
-        // NOTE: Decoded points are already normalized (i.e in affine form)
-        ECPoint gTilde = curve.decodePoint(C);
-
-        // Compute the static-ephemeral key agreement
-        ECPoint gHat = gTilde;
-        if ((CofactorMode) || (OldCofactorMode))
-        {
-            gHat = gHat.multiply(h);
-        }
-
-        BigInteger xHat = ecPrivKey.getD();
-        if (CofactorMode)
-        {
-            xHat = xHat.multiply(h.modInverse(n)).mod(n);
-        }
-
-        ECPoint hTilde = gHat.multiply(xHat).normalize();
-
-        // Encode the shared secret value
-        byte[] PEH = hTilde.getAffineXCoord().getEncoded();
-
-        // Initialise the KDF
-        byte[] kdfInput;
-        if (SingleHashMode)
-        {
-            kdfInput = new byte[C.length + PEH.length];
-            System.arraycopy(C, 0, kdfInput, 0, C.length);
-            System.arraycopy(PEH, 0, kdfInput, C.length, PEH.length);
-        }
-        else
-        {
-            kdfInput = PEH;
-        }
-        kdf.init(new KDFParameters(kdfInput, null));
-
-        // Generate the secret key
-        byte[] K = new byte[keyLen];
-        kdf.generateBytes(K, 0, K.length);
-
-        return new KeyParameter(K);
-    }
-
-    /**
-     * Decrypt an encapsulated session key.
-     *
-     * @param in     the input buffer for the encapsulated key.
-     * @param keyLen the length of the session key.
-     * @return the session key.
-     */
-    public CipherParameters decrypt(byte[] in, int keyLen)
-    {
-        return decrypt(in, 0, in.length, keyLen);
-    }
-}