105 lines
3.0 KiB
C#
105 lines
3.0 KiB
C#
#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
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#pragma warning disable
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using System;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Security;
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Prng
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{
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public class X931SecureRandom
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: SecureRandom
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{
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private readonly bool mPredictionResistant;
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private readonly SecureRandom mRandomSource;
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private readonly X931Rng mDrbg;
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internal X931SecureRandom(SecureRandom randomSource, X931Rng drbg, bool predictionResistant)
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: base(null)
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{
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this.mRandomSource = randomSource;
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this.mDrbg = drbg;
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this.mPredictionResistant = predictionResistant;
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}
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public override void SetSeed(byte[] seed)
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{
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lock (this)
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{
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if (mRandomSource != null)
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{
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this.mRandomSource.SetSeed(seed);
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}
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}
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}
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#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || _UNITY_2021_2_OR_NEWER_
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public override void SetSeed(Span<byte> seed)
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{
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lock (this)
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{
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if (mRandomSource != null)
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{
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this.mRandomSource.SetSeed(seed);
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}
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}
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}
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#endif
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public override void SetSeed(long seed)
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{
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lock (this)
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{
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// this will happen when SecureRandom() is created
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if (mRandomSource != null)
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{
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this.mRandomSource.SetSeed(seed);
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}
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}
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}
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public override void NextBytes(byte[] bytes)
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{
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NextBytes(bytes, 0, bytes.Length);
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}
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public override void NextBytes(byte[] buf, int off, int len)
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{
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#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || _UNITY_2021_2_OR_NEWER_
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NextBytes(buf.AsSpan(off, len));
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#else
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lock (this)
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{
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// check if a reseed is required...
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if (mDrbg.Generate(buf, off, len, mPredictionResistant) < 0)
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{
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mDrbg.Reseed();
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mDrbg.Generate(buf, off, len, mPredictionResistant);
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}
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}
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#endif
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}
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#if NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1_OR_GREATER || _UNITY_2021_2_OR_NEWER_
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public override void NextBytes(Span<byte> buffer)
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{
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lock (this)
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{
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// check if a reseed is required...
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if (mDrbg.Generate(buffer, mPredictionResistant) < 0)
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{
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mDrbg.Reseed();
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mDrbg.Generate(buffer, mPredictionResistant);
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}
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}
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}
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#endif
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public override byte[] GenerateSeed(int numBytes)
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{
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return EntropyUtilities.GenerateSeed(mDrbg.EntropySource, numBytes);
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}
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}
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}
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#pragma warning restore
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#endif
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