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• ECUtil.java

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com.fitbur.bouncycastle.crypto.ec.ECUtil Maven / Gradle / Ivy

package com.fitbur.bouncycastle.crypto.ec;

import java.math.BigInteger;
import java.security.SecureRandom;

import com.fitbur.bouncycastle.math.ec.ECConstants;

class ECUtil
{
    static BigInteger generateK(BigInteger n, SecureRandom random)
    {
        int nBitLength = n.bitLength();
        BigInteger k;
        do
        {
            k = new BigInteger(nBitLength, random);
        }
        while (k.equals(ECConstants.ZERO) || (k.com.fitburpareTo(n) >= 0));
        return k;
    }
}