Example usage for org.bouncycastle.crypto.prng EntropySource EntropySource

Introduction

In this page you can find the example usage for org.bouncycastle.crypto.prng EntropySource EntropySource.

Prototype

EntropySource

Source Link

Usage

From source file:org.cryptacular.generator.sp80038d.RBGNonce.java

License:Open Source License

/**
 * Creates a new DRBG instance.//w  w w . j  a  va 2s .  c  o m
 *
 * @param  length  Length in bits of values produced by DRBG.
 * @param  domain  Domain qualifier.
 *
 * @return  New DRBG instance.
 */
private static SP80090DRBG newRBG(final int length, final byte[] domain) {
    return new HashSP800DRBG(new SHA256Digest(), length, new EntropySource() {
        @Override
        public boolean isPredictionResistant() {
            return false;
        }

        @Override
        public byte[] getEntropy() {
            return NonceUtil.timestampNonce(length);
        }

        @Override
        public int entropySize() {
            return length;
        }
    }, domain, NonceUtil.timestampNonce(8));
}

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From source file:org.cryptacular.util.NonceUtil.java

License:Open Source License

/**
 * Creates a new hash-based DRBG instance that uses the given digest as the
 * pseudorandom source./*from   ww  w .  j  a va  2 s  .co m*/
 *
 * @param  digest  Digest algorithm.
 * @param  length  Length in bits of values to be produced by DRBG instance.
 *
 * @return  New DRGB instance.
 */
public static SP80090DRBG newRBG(final Digest digest, final int length) {
    return new HashSP800DRBG(digest, length, new EntropySource() {
        @Override
        public boolean isPredictionResistant() {
            return false;
        }

        @Override
        public byte[] getEntropy() {
            return NonceUtil.timestampNonce(length);
        }

        @Override
        public int entropySize() {
            return length;
        }
    }, null, NonceUtil.timestampNonce(8));
}

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