X931SecureRandom
using Org.BouncyCastle.Security;
using System;
namespace Org.BouncyCastle.Crypto.Prng
{
public class X931SecureRandom : SecureRandom
{
private readonly bool mPredictionResistant;
private readonly SecureRandom mRandomSource;
private readonly X931Rng mDrbg;
internal X931SecureRandom(SecureRandom randomSource, X931Rng drbg, bool predictionResistant)
: base(null)
{
mRandomSource = randomSource;
mDrbg = drbg;
mPredictionResistant = predictionResistant;
}
public override void SetSeed(byte[] seed)
{
lock (this) {
if (mRandomSource != null)
mRandomSource.SetSeed(seed);
}
}
public override void SetSeed(Span<byte> seed)
{
lock (this) {
if (mRandomSource != null)
mRandomSource.SetSeed(seed);
}
}
public override void SetSeed(long seed)
{
lock (this) {
if (mRandomSource != null)
mRandomSource.SetSeed(seed);
}
}
public override void NextBytes(byte[] bytes)
{
NextBytes(bytes, 0, bytes.Length);
}
public override void NextBytes(byte[] buf, int off, int len)
{
NextBytes(buf.AsSpan(off, len));
}
public override void NextBytes(Span<byte> buffer)
{
lock (this) {
if (mDrbg.Generate(buffer, mPredictionResistant) < 0) {
mDrbg.Reseed();
mDrbg.Generate(buffer, mPredictionResistant);
}
}
}
public override byte[] GenerateSeed(int numBytes)
{
return EntropyUtilities.GenerateSeed(mDrbg.EntropySource, numBytes);
}
public override void GenerateSeed(Span<byte> seed)
{
EntropyUtilities.GenerateSeed(mDrbg.EntropySource, seed);
}
}
}