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/*
* Copyright (c) 2023 Vaughn Nugent
*
* Library: VNLib
* Package: VNLib.Data.Caching.Extensions
* File: ListServerRequest.cs
*
* ListServerRequest.cs is part of VNLib.Data.Caching.Extensions which is part of the larger
* VNLib collection of libraries and utilities.
*
* VNLib.Data.Caching.Extensions is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* VNLib.Data.Caching.Extensions is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see https://www.gnu.org/licenses/.
*/
using System;
using System.Collections.Generic;
using VNLib.Utils;
using VNLib.Hashing.IdentityUtility;
namespace VNLib.Data.Caching.Extensions
{
/// <summary>
/// A request container for a ListServer request
/// </summary>
public sealed class ListServerRequest : VnDisposeable
{
private readonly bool _ownsKeys;
private ReadOnlyJsonWebKey? VerificationKey;
private ReadOnlyJsonWebKey? SigningAlg;
/// <summary>
/// The address of the broker server to connect to
/// </summary>
public Uri BrokerAddress { get; }
public ListServerRequest(Uri brokerAddress)
{
BrokerAddress = brokerAddress;
_ownsKeys = true;
}
private ListServerRequest(ClientCacheConfiguration conf)
{
//Broker verification key is required
VerificationKey = conf.BrokerVerificationKey;
SigningAlg = conf.SigningKey;
BrokerAddress = conf.BrokerAddress ?? throw new ArgumentException("Broker address must be specified");
_ownsKeys = false;
}
internal static ListServerRequest FromConfig(ClientCacheConfiguration conf) => new (conf);
/// <summary>
/// Sets the public key used to verify the signature of the response.
/// </summary>
/// <param name="jwk">The key used to verify messages </param>
public ListServerRequest WithVerificationKey(ReadOnlyJsonWebKey jwk)
{
VerificationKey = jwk ?? throw new ArgumentNullException(nameof(jwk));
return this;
}
/// <summary>
/// Sets the private key used to sign the request.
/// </summary>
/// <param name="jwk">The <see cref="ReadOnlyJsonWebKey"/> containing the private key used to sign the message</param>
/// <exception cref="ArgumentNullException"></exception>
public ListServerRequest WithSigningKey(ReadOnlyJsonWebKey jwk)
{
SigningAlg = jwk ?? throw new ArgumentNullException(nameof(jwk));
return this;
}
/// <summary>
/// Signs the <see cref="JsonWebToken"/> using the private key.
/// </summary>
/// <param name="jwt">The message to sign</param>
internal void SignJwt(JsonWebToken jwt)
{
jwt.SignFromJwk(SigningAlg);
}
/// <summary>
/// Verifies the signature of the <see cref="JsonWebToken"/>
/// </summary>
/// <param name="jwt"></param>
/// <returns>A value that indicates if the signature is verified</returns>
internal bool VerifyJwt(JsonWebToken jwt)
{
return jwt.VerifyFromJwk(VerificationKey);
}
internal IReadOnlyDictionary<string, string?> JwtHeader => SigningAlg!.JwtHeader;
///<inheritdoc/>
protected override void Free()
{
if (_ownsKeys)
{
VerificationKey?.Dispose();
SigningAlg?.Dispose();
}
}
}
}
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