Initial

MareSynchronosServer/MareSynchronosShared/Utils/ServerTokenGenerator.cs

@@ -0,0 +1,61 @@
+using MareSynchronosShared.Utils.Configuration;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using Microsoft.IdentityModel.Tokens;
+using System.IdentityModel.Tokens.Jwt;
+using System.Security.Claims;
+using System.Text;
+
+namespace MareSynchronosShared.Utils;
+
+public class ServerTokenGenerator
+{
+    private readonly IOptionsMonitor<MareConfigurationBase> _configuration;
+    private readonly ILogger<ServerTokenGenerator> _logger;
+
+    private Dictionary<string, string> _tokenDictionary { get; set; } = new(StringComparer.Ordinal);
+    public string Token
+    {
+        get
+        {
+            var currentJwt = _configuration.CurrentValue.Jwt;
+            if (_tokenDictionary.TryGetValue(currentJwt, out var token))
+            {
+                return token;
+            }
+
+            return GenerateToken();
+        }
+    }
+
+    public ServerTokenGenerator(IOptionsMonitor<MareConfigurationBase> configuration, ILogger<ServerTokenGenerator> logger)
+    {
+        _configuration = configuration;
+        _logger = logger;
+    }
+
+    private string GenerateToken()
+    {
+        var signingKey = _configuration.CurrentValue.Jwt;
+        var authSigningKey = new SymmetricSecurityKey(Encoding.ASCII.GetBytes(signingKey));
+
+        var token = new SecurityTokenDescriptor()
+        {
+            Subject = new ClaimsIdentity(new List<Claim>()
+            {
+                new Claim(MareClaimTypes.Uid, _configuration.CurrentValue.ShardName),
+                new Claim(MareClaimTypes.Internal, "true"),
+            }),
+            SigningCredentials = new SigningCredentials(authSigningKey, SecurityAlgorithms.HmacSha256Signature),
+        };
+
+        var handler = new JwtSecurityTokenHandler();
+        var rawData = handler.CreateJwtSecurityToken(token).RawData;
+
+        _tokenDictionary[signingKey] = rawData;
+
+        _logger.LogInformation("Generated Token: {data}", rawData);
+
+        return rawData;
+    }
+}