1 files changed, 0 insertions, 307 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/prng/drbg/DualECSP800DRBG.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/prng/drbg/DualECSP800DRBG.java
deleted file mode 100644
index 13765bf2c..000000000
--- a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/prng/drbg/DualECSP800DRBG.java
+++ /dev/null
@@ -1,307 +0,0 @@
-package org.spongycastle.crypto.prng.drbg;
-
-import java.math.BigInteger;
-
-import org.spongycastle.asn1.nist.NISTNamedCurves;
-import org.spongycastle.crypto.Digest;
-import org.spongycastle.crypto.prng.EntropySource;
-import org.spongycastle.math.ec.ECCurve;
-import org.spongycastle.math.ec.ECPoint;
-import org.spongycastle.util.Arrays;
-import org.spongycastle.util.BigIntegers;
-
-/**
- * A SP800-90A Dual EC DRBG.
- */
-public class DualECSP800DRBG
-    implements SP80090DRBG
-{
-    /*
-     * Default P, Q values for each curve
-     */
-    private static final BigInteger p256_Px = new BigInteger("6b17d1f2e12c4247f8bce6e563a440f277037d812deb33a0f4a13945d898c296", 16);
-    private static final BigInteger p256_Py = new BigInteger("4fe342e2fe1a7f9b8ee7eb4a7c0f9e162bce33576b315ececbb6406837bf51f5", 16);
-    private static final BigInteger p256_Qx = new BigInteger("c97445f45cdef9f0d3e05e1e585fc297235b82b5be8ff3efca67c59852018192", 16);
-    private static final BigInteger p256_Qy = new BigInteger("b28ef557ba31dfcbdd21ac46e2a91e3c304f44cb87058ada2cb815151e610046", 16);
-
-    private static final BigInteger p384_Px = new BigInteger("aa87ca22be8b05378eb1c71ef320ad746e1d3b628ba79b9859f741e082542a385502f25dbf55296c3a545e3872760ab7", 16);
-    private static final BigInteger p384_Py = new BigInteger("3617de4a96262c6f5d9e98bf9292dc29f8f41dbd289a147ce9da3113b5f0b8c00a60b1ce1d7e819d7a431d7c90ea0e5f", 16);
-    private static final BigInteger p384_Qx = new BigInteger("8e722de3125bddb05580164bfe20b8b432216a62926c57502ceede31c47816edd1e89769124179d0b695106428815065", 16);
-    private static final BigInteger p384_Qy = new BigInteger("023b1660dd701d0839fd45eec36f9ee7b32e13b315dc02610aa1b636e346df671f790f84c5e09b05674dbb7e45c803dd", 16);
-
-    private static final BigInteger p521_Px = new BigInteger("c6858e06b70404e9cd9e3ecb662395b4429c648139053fb521f828af606b4d3dbaa14b5e77efe75928fe1dc127a2ffa8de3348b3c1856a429bf97e7e31c2e5bd66", 16);
-    private static final BigInteger p521_Py = new BigInteger("11839296a789a3bc0045c8a5fb42c7d1bd998f54449579b446817afbd17273e662c97ee72995ef42640c550b9013fad0761353c7086a272c24088be94769fd16650", 16);
-    private static final BigInteger p521_Qx = new BigInteger("1b9fa3e518d683c6b65763694ac8efbaec6fab44f2276171a42726507dd08add4c3b3f4c1ebc5b1222ddba077f722943b24c3edfa0f85fe24d0c8c01591f0be6f63", 16);
-    private static final BigInteger p521_Qy = new BigInteger("1f3bdba585295d9a1110d1df1f9430ef8442c5018976ff3437ef91b81dc0b8132c8d5c39c32d0e004a3092b7d327c0e7a4d26d2c7b69b58f9066652911e457779de", 16);
-
-    private static final DualECPoints[] nistPoints;
-
-    static
-    {
-        nistPoints = new DualECPoints[3];
-
-        ECCurve.Fp curve = (ECCurve.Fp)NISTNamedCurves.getByName("P-256").getCurve();
-
-        nistPoints[0] = new DualECPoints(128, curve.createPoint(p256_Px, p256_Py), curve.createPoint(p256_Qx, p256_Qy), 1);
-
-        curve = (ECCurve.Fp)NISTNamedCurves.getByName("P-384").getCurve();
-
-        nistPoints[1] = new DualECPoints(192, curve.createPoint(p384_Px, p384_Py), curve.createPoint(p384_Qx, p384_Qy), 1);
-
-        curve = (ECCurve.Fp)NISTNamedCurves.getByName("P-521").getCurve();
-
-        nistPoints[2] = new DualECPoints(256, curve.createPoint(p521_Px, p521_Py), curve.createPoint(p521_Qx, p521_Qy), 1);
-    }
-
-
-    private static final long       RESEED_MAX = 1L << (32 - 1);
-    private static final int        MAX_ADDITIONAL_INPUT = 1 << (13 - 1);
-    private static final int        MAX_ENTROPY_LENGTH = 1 << (13 - 1);
-    private static final int        MAX_PERSONALIZATION_STRING = 1 << (13 -1);
-
-    private Digest                 _digest;
-    private long                   _reseedCounter;
-    private EntropySource          _entropySource;
-    private int                    _securityStrength;
-    private int                    _seedlen;
-    private int                    _outlen;
-    private ECCurve.Fp             _curve;
-    private ECPoint                _P;
-    private ECPoint                _Q;
-    private byte[]                 _s;
-    private int                    _sLength;
-
-    /**
-     * Construct a SP800-90A Dual EC DRBG.
-     * <p>
-     * Minimum entropy requirement is the security strength requested.
-     * </p>
-     * @param digest source digest to use with the DRB stream.
-     * @param securityStrength security strength required (in bits)
-     * @param entropySource source of entropy to use for seeding/reseeding.
-     * @param personalizationString personalization string to distinguish this DRBG (may be null).
-     * @param nonce nonce to further distinguish this DRBG (may be null).
-     */
-    public DualECSP800DRBG(Digest digest, int securityStrength, EntropySource entropySource, byte[] personalizationString, byte[] nonce)
-    {
-        this(nistPoints, digest, securityStrength, entropySource, personalizationString, nonce);
-    }
-
-    /**
-     * Construct a SP800-90A Dual EC DRBG.
-     * <p>
-     * Minimum entropy requirement is the security strength requested.
-     * </p>
-     * @param pointSet an array of points to choose from, in order of increasing security strength
-     * @param digest source digest to use with the DRB stream.
-     * @param securityStrength security strength required (in bits)
-     * @param entropySource source of entropy to use for seeding/reseeding.
-     * @param personalizationString personalization string to distinguish this DRBG (may be null).
-     * @param nonce nonce to further distinguish this DRBG (may be null).
-     */
-    public DualECSP800DRBG(DualECPoints[] pointSet, Digest digest, int securityStrength, EntropySource entropySource, byte[] personalizationString, byte[] nonce)
-    {
-        _digest = digest;
-        _entropySource = entropySource;
-        _securityStrength = securityStrength;
-
-        if (Utils.isTooLarge(personalizationString, MAX_PERSONALIZATION_STRING / 8))
-        {
-            throw new IllegalArgumentException("Personalization string too large");
-        }
-
-        if (entropySource.entropySize() < securityStrength || entropySource.entropySize() > MAX_ENTROPY_LENGTH)
-        {
-            throw new IllegalArgumentException("EntropySource must provide between " + securityStrength + " and " + MAX_ENTROPY_LENGTH + " bits");
-        }
-
-        byte[] entropy = entropySource.getEntropy();
-        byte[] seedMaterial = Arrays.concatenate(entropy, nonce, personalizationString);
-
-        for (int i = 0; i != pointSet.length; i++)
-        {
-            if (securityStrength <= pointSet[i].getSecurityStrength())
-            {
-                if (Utils.getMaxSecurityStrength(digest) < pointSet[i].getSecurityStrength())
-                {
-                    throw new IllegalArgumentException("Requested security strength is not supported by digest");
-                }
-                _seedlen = pointSet[i].getSeedLen();
-                _outlen =  pointSet[i].getMaxOutlen() / 8;
-                _P = pointSet[i].getP();
-                _Q = pointSet[i].getQ();
-                break;
-            }
-        }
-
-        if (_P == null)
-        {
-            throw new IllegalArgumentException("security strength cannot be greater than 256 bits");
-        }
-
-        _s = Utils.hash_df(_digest, seedMaterial, _seedlen);
-        _sLength = _s.length;
-
-        _reseedCounter = 0;
-    }
-
-    /**
-     * Populate a passed in array with random data.
-     *
-     * @param output output array for generated bits.
-     * @param additionalInput additional input to be added to the DRBG in this step.
-     * @param predictionResistant true if a reseed should be forced, false otherwise.
-     *
-     * @return number of bits generated, -1 if a reseed required.
-     */
-    public int generate(byte[] output, byte[] additionalInput, boolean predictionResistant)
-    {
-        int numberOfBits = output.length*8;
-        int m = output.length / _outlen;
-
-        if (Utils.isTooLarge(additionalInput, MAX_ADDITIONAL_INPUT / 8))
-        {
-            throw new IllegalArgumentException("Additional input too large");
-        }
-
-        if (_reseedCounter + m > RESEED_MAX)
-        {
-            return -1;
-        }
-
-        if (predictionResistant)
-        {   
-            reseed(additionalInput);
-            additionalInput = null;
-        }
-
-        BigInteger s;
-
-        if (additionalInput != null)
-        {
-            // Note: we ignore the use of pad8 on the additional input as we mandate byte arrays for it.
-            additionalInput = Utils.hash_df(_digest, additionalInput, _seedlen);
-            s = new BigInteger(1, xor(_s, additionalInput));
-        }
-        else
-        {
-            s = new BigInteger(1, _s);
-        }
-
-        // make sure we start with a clean output array.
-        Arrays.fill(output, (byte)0);
-
-        int outOffset = 0;
-
-        for (int i = 0; i < m; i++)
-        {
-            s = getScalarMultipleXCoord(_P, s);
-
-            //System.err.println("S: " + new String(Hex.encode(_s)));
-
-            byte[] r = _Q.multiply(s).normalize().getAffineXCoord().toBigInteger().toByteArray();
-
-            if (r.length > _outlen)
-            {
-                System.arraycopy(r, r.length - _outlen, output, outOffset, _outlen);
-            }
-            else
-            {
-                System.arraycopy(r, 0, output, outOffset + (_outlen - r.length), r.length);
-            }
-
-            //System.err.println("R: " + new String(Hex.encode(r)));
-            outOffset += _outlen;
-
-            _reseedCounter++;
-        }
-
-        if (outOffset < output.length)
-        {
-            s = getScalarMultipleXCoord(_P, s);
-
-            byte[] r = _Q.multiply(s).normalize().getAffineXCoord().toBigInteger().toByteArray();
-
-            int required = output.length - outOffset;
-
-            if (r.length > _outlen)
-            {
-                System.arraycopy(r, r.length - _outlen, output, outOffset, required);
-            }
-            else
-            {
-                System.arraycopy(r, 0, output, outOffset + (_outlen - r.length), required);
-            }
-
-            _reseedCounter++;
-        }
-
-        // Need to preserve length of S as unsigned int.
-        _s = BigIntegers.asUnsignedByteArray(_sLength, _P.multiply(s).normalize().getAffineXCoord().toBigInteger());
-
-        return numberOfBits;
-    }
-
-    /**
-      * Reseed the DRBG.
-      *
-      * @param additionalInput additional input to be added to the DRBG in this step.
-      */
-    public void reseed(byte[] additionalInput)
-    {
-        if (Utils.isTooLarge(additionalInput, MAX_ADDITIONAL_INPUT / 8))
-        {
-            throw new IllegalArgumentException("Additional input string too large");
-        }
-
-        byte[] entropy = _entropySource.getEntropy();
-        byte[] seedMaterial = Arrays.concatenate(pad8(_s, _seedlen), entropy, additionalInput);
-
-        _s = Utils.hash_df(_digest, seedMaterial, _seedlen);
-
-        _reseedCounter = 0;
-    }
-
-    private byte[] xor(byte[] a, byte[] b)
-    {
-        if (b == null)
-        {
-            return a;
-        }
-
-        byte[] rv = new byte[a.length];
-
-        for (int i = 0; i != rv.length; i++)
-        {
-            rv[i] = (byte)(a[i] ^ b[i]);
-        }
-
-        return rv;
-    }
-
-    // Note: works in place
-    private byte[] pad8(byte[] s, int seedlen)
-    {
-        if (seedlen % 8 == 0)
-        {
-            return s;
-        }
-
-        int shift = 8 - (seedlen % 8);
-        int carry = 0;
-
-        for (int i = s.length - 1; i >= 0; i--)
-        {
-            int b = s[i] & 0xff;
-            s[i] = (byte)((b << shift) | (carry >> (8 - shift)));
-            carry = b;
-        }
-
-        return s;
-    }
-
-    private BigInteger getScalarMultipleXCoord(ECPoint p, BigInteger s)
-    {
-        return p.multiply(s).normalize().getAffineXCoord().toBigInteger();
-    }
-}