1 files changed, 0 insertions, 171 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/prng/drbg/HMacSP800DRBG.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/prng/drbg/HMacSP800DRBG.java
deleted file mode 100644
index ad93896cc..000000000
--- a/libraries/spongycastle/core/src/main/java/org/spongycastle/crypto/prng/drbg/HMacSP800DRBG.java
+++ /dev/null
@@ -1,171 +0,0 @@
-package org.spongycastle.crypto.prng.drbg;
-
-import org.spongycastle.crypto.Mac;
-import org.spongycastle.crypto.params.KeyParameter;
-import org.spongycastle.crypto.prng.EntropySource;
-import org.spongycastle.util.Arrays;
-
-/**
- * A SP800-90A HMAC DRBG.
- */
-public class HMacSP800DRBG
-    implements SP80090DRBG
-{
-    private final static long       RESEED_MAX = 1L << (48 - 1);
-    private final static int        MAX_BITS_REQUEST = 1 << (19 - 1);
-
-    private byte[] _K;
-    private byte[] _V;
-    private long   _reseedCounter;
-    private EntropySource _entropySource;
-    private Mac _hMac;
-
-    /**
-     * Construct a SP800-90A Hash DRBG.
-     * <p>
-     * Minimum entropy requirement is the security strength requested.
-     * </p>
-     * @param hMac Hash MAC to base the DRBG on.
-     * @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 HMacSP800DRBG(Mac hMac, int securityStrength, EntropySource entropySource, byte[] personalizationString, byte[] nonce)
-    {
-        if (securityStrength > Utils.getMaxSecurityStrength(hMac))
-        {
-            throw new IllegalArgumentException("Requested security strength is not supported by the derivation function");
-        }
-
-        if (entropySource.entropySize() < securityStrength)
-        {
-            throw new IllegalArgumentException("Not enough entropy for security strength required");
-        }
-
-        _entropySource = entropySource;
-        _hMac = hMac;
-
-        byte[] entropy = entropySource.getEntropy();
-        byte[] seedMaterial = Arrays.concatenate(entropy, nonce, personalizationString);
-
-        _K = new byte[hMac.getMacSize()];
-        _V = new byte[_K.length];
-        Arrays.fill(_V, (byte)1);
-
-        hmac_DRBG_Update(seedMaterial);
-
-        _reseedCounter = 1;
-    }
-
-    private void hmac_DRBG_Update(byte[] seedMaterial)
-    {
-        hmac_DRBG_Update_Func(seedMaterial, (byte)0x00);
-        if (seedMaterial != null)
-        {
-            hmac_DRBG_Update_Func(seedMaterial, (byte)0x01);
-        }
-    }
-
-    private void hmac_DRBG_Update_Func(byte[] seedMaterial, byte vValue)
-    {
-        _hMac.init(new KeyParameter(_K));
-
-        _hMac.update(_V, 0, _V.length);
-        _hMac.update(vValue);
-
-        if (seedMaterial != null)
-        {
-            _hMac.update(seedMaterial, 0, seedMaterial.length);
-        }
-
-        _hMac.doFinal(_K, 0);
-
-        _hMac.init(new KeyParameter(_K));
-        _hMac.update(_V, 0, _V.length);
-
-        _hMac.doFinal(_V, 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;
-
-        if (numberOfBits > MAX_BITS_REQUEST)
-        {
-            throw new IllegalArgumentException("Number of bits per request limited to " + MAX_BITS_REQUEST);
-        }
-
-        if (_reseedCounter > RESEED_MAX)
-        {
-            return -1;
-        }
-
-        if (predictionResistant)
-        {
-            reseed(additionalInput);
-            additionalInput = null;
-        }
-
-        // 2.
-        if (additionalInput != null)
-        {
-            hmac_DRBG_Update(additionalInput);
-        }
-
-        // 3.
-        byte[] rv = new byte[output.length];
-
-        int m = output.length / _V.length;
-
-        _hMac.init(new KeyParameter(_K));
-
-        for (int i = 0; i < m; i++)
-        {
-            _hMac.update(_V, 0, _V.length);
-            _hMac.doFinal(_V, 0);
-
-            System.arraycopy(_V, 0, rv, i * _V.length, _V.length);
-        }
-
-        if (m * _V.length < rv.length)
-        {
-            _hMac.update(_V, 0, _V.length);
-            _hMac.doFinal(_V, 0);
-
-            System.arraycopy(_V, 0, rv, m * _V.length, rv.length - (m * _V.length));
-        }
-
-        hmac_DRBG_Update(additionalInput);
-
-        _reseedCounter++;
-
-        System.arraycopy(rv, 0, output, 0, output.length);
-
-        return numberOfBits;
-    }
-
-    /**
-      * Reseed the DRBG.
-      *
-      * @param additionalInput additional input to be added to the DRBG in this step.
-      */
-    public void reseed(byte[] additionalInput)
-    {
-        byte[] entropy = _entropySource.getEntropy();
-        byte[] seedMaterial = Arrays.concatenate(entropy, additionalInput);
-
-        hmac_DRBG_Update(seedMaterial);
-
-        _reseedCounter = 1;
-    }
-}