87 lines
3.2 KiB
C#
87 lines
3.2 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.Utilities;
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Tls.Crypto.Impl
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{
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/// <summary>Useful utility methods.</summary>
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public abstract class TlsImplUtilities
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{
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public static bool IsSsl(TlsCryptoParameters cryptoParams)
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{
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return cryptoParams.ServerVersion.IsSsl;
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}
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public static bool IsTlsV10(ProtocolVersion version)
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{
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return ProtocolVersion.TLSv10.IsEqualOrEarlierVersionOf(version.GetEquivalentTlsVersion());
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}
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public static bool IsTlsV10(TlsCryptoParameters cryptoParams)
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{
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return IsTlsV10(cryptoParams.ServerVersion);
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}
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public static bool IsTlsV11(ProtocolVersion version)
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{
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return ProtocolVersion.TLSv11.IsEqualOrEarlierVersionOf(version.GetEquivalentTlsVersion());
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}
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public static bool IsTlsV11(TlsCryptoParameters cryptoParams)
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{
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return IsTlsV11(cryptoParams.ServerVersion);
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}
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public static bool IsTlsV12(ProtocolVersion version)
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{
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return ProtocolVersion.TLSv12.IsEqualOrEarlierVersionOf(version.GetEquivalentTlsVersion());
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}
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public static bool IsTlsV12(TlsCryptoParameters cryptoParams)
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{
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return IsTlsV12(cryptoParams.ServerVersion);
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}
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public static bool IsTlsV13(ProtocolVersion version)
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{
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return ProtocolVersion.TLSv13.IsEqualOrEarlierVersionOf(version.GetEquivalentTlsVersion());
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}
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public static bool IsTlsV13(TlsCryptoParameters cryptoParams)
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{
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return IsTlsV13(cryptoParams.ServerVersion);
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}
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public static byte[] CalculateKeyBlock(TlsCryptoParameters cryptoParams, int length)
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{
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SecurityParameters securityParameters = cryptoParams.SecurityParameters;
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TlsSecret master_secret = securityParameters.MasterSecret;
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int prfAlgorithm = securityParameters.PrfAlgorithm;
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byte[] seed = Arrays.Concatenate(securityParameters.ServerRandom, securityParameters.ClientRandom);
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return master_secret.DeriveUsingPrf(prfAlgorithm, ExporterLabel.key_expansion, seed, length).Extract();
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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 static void CalculateKeyBlock(TlsCryptoParameters cryptoParams, Span<byte> keyBlock)
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{
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SecurityParameters securityParameters = cryptoParams.SecurityParameters;
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TlsSecret master_secret = securityParameters.MasterSecret;
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int prfAlgorithm = securityParameters.PrfAlgorithm;
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Span<byte> cr = securityParameters.ClientRandom, sr = securityParameters.ServerRandom;
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Span<byte> seed = stackalloc byte[sr.Length + cr.Length];
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sr.CopyTo(seed);
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cr.CopyTo(seed[sr.Length..]);
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TlsSecret derived = master_secret.DeriveUsingPrf(prfAlgorithm, ExporterLabel.key_expansion, seed,
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keyBlock.Length);
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derived.ExtractTo(keyBlock);
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}
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#endif
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}
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}
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#pragma warning restore
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#endif
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