95 lines
2.6 KiB
C#
95 lines
2.6 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 System.Security.Cryptography;
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Prng
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{
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/// <summary>
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/// Uses RandomNumberGenerator.Create() to get randomness generator
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/// </summary>
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public sealed class CryptoApiRandomGenerator
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: IRandomGenerator, IDisposable
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{
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private readonly RandomNumberGenerator m_randomNumberGenerator;
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public CryptoApiRandomGenerator()
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: this(RandomNumberGenerator.Create())
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{
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}
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public CryptoApiRandomGenerator(RandomNumberGenerator randomNumberGenerator)
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{
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m_randomNumberGenerator = randomNumberGenerator ??
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throw new ArgumentNullException(nameof(randomNumberGenerator));
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}
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#region IRandomGenerator Members
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public void AddSeedMaterial(byte[] seed)
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{
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// We don't care about the seed
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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 void AddSeedMaterial(ReadOnlySpan<byte> inSeed)
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{
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// We don't care about the seed
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}
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#endif
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public void AddSeedMaterial(long seed)
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{
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// We don't care about the seed
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}
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public void NextBytes(byte[] bytes)
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{
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m_randomNumberGenerator.GetBytes(bytes);
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}
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public void NextBytes(byte[] bytes, int start, int len)
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{
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#if NETCOREAPP2_0_OR_GREATER || NETSTANDARD2_0_OR_GREATER
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m_randomNumberGenerator.GetBytes(bytes, start, len);
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#else
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if (start < 0)
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throw new ArgumentException("Start offset cannot be negative", "start");
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if (bytes.Length < (start + len))
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throw new ArgumentException("Byte array too small for requested offset and length");
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if (bytes.Length == len && start == 0)
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{
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NextBytes(bytes);
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}
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else
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{
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byte[] tmpBuf = new byte[len];
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NextBytes(tmpBuf);
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Array.Copy(tmpBuf, 0, bytes, start, len);
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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 void NextBytes(Span<byte> bytes)
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{
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m_randomNumberGenerator.GetBytes(bytes);
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}
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#endif
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#endregion
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#region IDisposable Members
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public void Dispose()
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{
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m_randomNumberGenerator.Dispose();
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}
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#endregion
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}
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}
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#pragma warning restore
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#endif
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