91 lines
2.2 KiB
C#
91 lines
2.2 KiB
C#
using System;
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using System.IO;
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using Org.BouncyCastle.Math.EC.Rfc8032;
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using Org.BouncyCastle.Security;
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using Org.BouncyCastle.Utilities;
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using Org.BouncyCastle.Utilities.IO;
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namespace Org.BouncyCastle.Crypto.Parameters;
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public sealed class Ed25519PrivateKeyParameters : AsymmetricKeyParameter
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{
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public static readonly int KeySize = Ed25519.SecretKeySize;
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public static readonly int SignatureSize = Ed25519.SignatureSize;
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private readonly byte[] data = new byte[KeySize];
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public Ed25519PrivateKeyParameters(SecureRandom random)
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: base(privateKey: true)
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{
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Ed25519.GeneratePrivateKey(random, data);
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}
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public Ed25519PrivateKeyParameters(byte[] buf, int off)
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: base(privateKey: true)
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{
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Array.Copy(buf, off, data, 0, KeySize);
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}
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public Ed25519PrivateKeyParameters(Stream input)
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: base(privateKey: true)
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{
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if (KeySize != Streams.ReadFully(input, data))
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{
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throw new EndOfStreamException("EOF encountered in middle of Ed25519 private key");
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}
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}
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public void Encode(byte[] buf, int off)
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{
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Array.Copy(data, 0, buf, off, KeySize);
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}
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public byte[] GetEncoded()
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{
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return Arrays.Clone(data);
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}
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public Ed25519PublicKeyParameters GeneratePublicKey()
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{
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byte[] array = new byte[Ed25519.PublicKeySize];
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Ed25519.GeneratePublicKey(data, 0, array, 0);
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return new Ed25519PublicKeyParameters(array, 0);
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}
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public void Sign(Ed25519.Algorithm algorithm, Ed25519PublicKeyParameters publicKey, byte[] ctx, byte[] msg, int msgOff, int msgLen, byte[] sig, int sigOff)
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{
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byte[] array = new byte[Ed25519.PublicKeySize];
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if (publicKey == null)
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{
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Ed25519.GeneratePublicKey(data, 0, array, 0);
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}
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else
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{
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publicKey.Encode(array, 0);
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}
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switch (algorithm)
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{
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case Ed25519.Algorithm.Ed25519:
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if (ctx != null)
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{
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throw new ArgumentException("ctx");
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}
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Ed25519.Sign(data, 0, array, 0, msg, msgOff, msgLen, sig, sigOff);
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break;
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case Ed25519.Algorithm.Ed25519ctx:
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Ed25519.Sign(data, 0, array, 0, ctx, msg, msgOff, msgLen, sig, sigOff);
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break;
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case Ed25519.Algorithm.Ed25519ph:
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if (Ed25519.PrehashSize != msgLen)
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{
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throw new ArgumentException("msgLen");
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}
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Ed25519.SignPrehash(data, 0, array, 0, ctx, msg, msgOff, sig, sigOff);
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break;
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default:
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throw new ArgumentException("algorithm");
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}
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}
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}
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