135 lines
3.8 KiB
C#
135 lines
3.8 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.IO;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters;
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using BestHTTP.SecureProtocol.Org.BouncyCastle.Math.EC.Rfc8032;
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namespace BestHTTP.SecureProtocol.Org.BouncyCastle.Crypto.Signers
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{
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public class Ed25519Signer
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: ISigner
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{
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private readonly Buffer buffer = new Buffer();
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private bool forSigning;
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private Ed25519PrivateKeyParameters privateKey;
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private Ed25519PublicKeyParameters publicKey;
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public Ed25519Signer()
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{
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}
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public virtual string AlgorithmName
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{
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get { return "Ed25519"; }
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}
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public virtual void Init(bool forSigning, ICipherParameters parameters)
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{
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this.forSigning = forSigning;
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if (forSigning)
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{
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this.privateKey = (Ed25519PrivateKeyParameters)parameters;
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this.publicKey = null;
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}
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else
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{
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this.privateKey = null;
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this.publicKey = (Ed25519PublicKeyParameters)parameters;
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}
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Reset();
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}
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public virtual void Update(byte b)
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{
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buffer.WriteByte(b);
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}
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public virtual void BlockUpdate(byte[] buf, int off, int len)
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{
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buffer.Write(buf, off, 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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public virtual void BlockUpdate(ReadOnlySpan<byte> input)
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{
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buffer.Write(input);
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}
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#endif
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public virtual byte[] GenerateSignature()
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{
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if (!forSigning || null == privateKey)
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throw new InvalidOperationException("Ed25519Signer not initialised for signature generation.");
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return buffer.GenerateSignature(privateKey);
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}
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public virtual bool VerifySignature(byte[] signature)
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{
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if (forSigning || null == publicKey)
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throw new InvalidOperationException("Ed25519Signer not initialised for verification");
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return buffer.VerifySignature(publicKey, signature);
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}
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public virtual void Reset()
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{
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buffer.Reset();
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}
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private class Buffer : MemoryStream
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{
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internal byte[] GenerateSignature(Ed25519PrivateKeyParameters privateKey)
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{
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lock (this)
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{
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byte[] buf = GetBuffer();
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int count = Convert.ToInt32(Length);
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byte[] signature = new byte[Ed25519PrivateKeyParameters.SignatureSize];
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privateKey.Sign(Ed25519.Algorithm.Ed25519, null, buf, 0, count, signature, 0);
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Reset();
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return signature;
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}
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}
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internal bool VerifySignature(Ed25519PublicKeyParameters publicKey, byte[] signature)
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{
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if (Ed25519.SignatureSize != signature.Length)
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{
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Reset();
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return false;
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}
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lock (this)
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{
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byte[] buf = GetBuffer();
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int count = Convert.ToInt32(Length);
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byte[] pk = publicKey.GetEncoded();
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bool result = Ed25519.Verify(signature, 0, pk, 0, buf, 0, count);
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Reset();
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return result;
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}
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}
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internal void Reset()
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{
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lock (this)
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{
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int count = Convert.ToInt32(Length);
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Array.Clear(GetBuffer(), 0, count);
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SetLength(0);
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}
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}
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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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