118 lines
3.5 KiB
C#
118 lines
3.5 KiB
C#
using System.Security.Cryptography;
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using System.Text;
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using System.Text.RegularExpressions;
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using Domain.Config;
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using MediatR;
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using Microsoft.Extensions.Options;
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namespace Application.Game.Server;
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public record CertifyCommand(string? Gid, string? Mac, string? Random, string? Md5, string Host) : IRequest<string>;
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public partial class CertifyCommandHandler : IRequestHandler<CertifyCommand, string>
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{
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private readonly RelayConfig relayConfig;
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private readonly AuthConfig authConfig;
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public CertifyCommandHandler(IOptions<RelayConfig> relayOptions, IOptions<AuthConfig> authOptions)
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{
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relayConfig = relayOptions.Value;
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authConfig = authOptions.Value;
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}
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public Task<string> Handle(CertifyCommand request, CancellationToken cancellationToken)
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{
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if (request.Gid == null)
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{
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return Task.FromResult(QuitWithError(ErrorCode.ErrorNoGid));
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}
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if (request.Mac == null)
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{
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return Task.FromResult(QuitWithError(ErrorCode.ErrorNoMac));
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}
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if (request.Random == null)
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{
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return Task.FromResult(QuitWithError(ErrorCode.ErrorNoRandom));
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}
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if (request.Md5 == null)
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{
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return Task.FromResult(QuitWithError(ErrorCode.ErrorNoHash));
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}
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if (!MacValid(request.Mac) )
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{
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return Task.FromResult(QuitWithError(ErrorCode.ErrorInvalidMac));
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}
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if (!Md5Valid(request.Md5))
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{
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return Task.FromResult(QuitWithError(ErrorCode.ErrorInvalidHash));
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}
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var machine = new Machine
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{
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TenpoId = "1337",
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TenpoName = "GCLocalServer",
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Pref = "nesys",
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Location = "Local",
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Mac = request.Mac
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};
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if (authConfig.Enabled)
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{
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machine = authConfig.Machines.FirstOrDefault(m => m.Mac == request.Mac);
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if (machine is null)
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{
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return Task.FromResult(QuitWithError(ErrorCode.ErrorInvalidMac));
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}
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}
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var ticket = string.Join(string.Empty,
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MD5.HashData(Encoding.UTF8.GetBytes(request.Gid)).Select(b => b.ToString("x2")));
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var response = $"host=card_id=7020392000147361,relay_addr={relayConfig.RelayServer},relay_port={relayConfig.RelayPort}\n" +
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$"no={machine.TenpoId}\n" +
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$"name={machine.TenpoName}\n" +
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$"pref={machine.Pref}\n" +
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$"addr={machine.Location}\n" +
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"x-next-time=15\n" +
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$"x-img=http://{request.Host}/news.png\n" +
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$"x-ranking=http://{request.Host}/ranking/ranking.php\n" +
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$"ticket={ticket}";
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return Task.FromResult(response);
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}
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private static bool MacValid(string mac)
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{
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return MacRegex().IsMatch(mac);
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}
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private static bool Md5Valid(string md5)
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{
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return Md5Regex().IsMatch(md5);
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}
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private static string QuitWithError(ErrorCode errorCode)
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{
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return $"error={(int)errorCode}";
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}
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private enum ErrorCode
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{
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ErrorNoGid,
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ErrorNoMac,
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ErrorNoRandom,
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ErrorNoHash,
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ErrorInvalidMac,
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ErrorInvalidHash
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}
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[GeneratedRegex("^[a-fA-F0-9]{12}$")]
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private static partial Regex MacRegex();
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[GeneratedRegex("^[a-fA-F0-9]{32}$")]
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private static partial Regex Md5Regex();
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}
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