From 4b6460e7d564eebff7a79df475a702dbd3f009b9 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Fri, 23 Apr 2021 19:06:11 +0800
Subject: feat: Fix #51.

---
 BackEnd/Timeline/Services/UserTokenService.cs | 149 --------------------------
 1 file changed, 149 deletions(-)
 delete mode 100644 BackEnd/Timeline/Services/UserTokenService.cs

(limited to 'BackEnd/Timeline/Services/UserTokenService.cs')

diff --git a/BackEnd/Timeline/Services/UserTokenService.cs b/BackEnd/Timeline/Services/UserTokenService.cs
deleted file mode 100644
index 86f3a0f7..00000000
--- a/BackEnd/Timeline/Services/UserTokenService.cs
+++ /dev/null
@@ -1,149 +0,0 @@
-using Microsoft.Extensions.Options;
-using Microsoft.IdentityModel.Tokens;
-using System;
-using System.Globalization;
-using System.IdentityModel.Tokens.Jwt;
-using System.Linq;
-using System.Security.Claims;
-using Timeline.Configs;
-using Timeline.Entities;
-
-namespace Timeline.Services
-{
-    public class UserTokenInfo
-    {
-        public long Id { get; set; }
-        public long Version { get; set; }
-        public DateTime? ExpireAt { get; set; }
-    }
-
-    public interface IUserTokenService
-    {
-        /// <summary>
-        /// Create a token for a given token info.
-        /// </summary>
-        /// <param name="tokenInfo">The info to generate token.</param>
-        /// <returns>Return the generated token.</returns>
-        /// <exception cref="ArgumentNullException">Thrown when <paramref name="tokenInfo"/> is null.</exception>
-        string GenerateToken(UserTokenInfo tokenInfo);
-
-        /// <summary>
-        /// Verify a token and get the saved info.
-        /// </summary>
-        /// <param name="token">The token to verify.</param>
-        /// <returns>The saved info in token.</returns>
-        /// <exception cref="ArgumentNullException">Thrown when <paramref name="token"/> is null.</exception>
-        /// <exception cref="UserTokenBadFormatException">Thrown when the token is of bad format.</exception>
-        /// <remarks>
-        /// If this method throw <see cref="UserTokenBadFormatException"/>, it usually means the token is not created by this service.
-        /// </remarks>
-        UserTokenInfo VerifyToken(string token);
-    }
-
-    public class JwtUserTokenService : IUserTokenService
-    {
-        private const string VersionClaimType = "timeline_version";
-
-        private readonly IOptionsMonitor<JwtConfiguration> _jwtConfig;
-        private readonly IClock _clock;
-
-        private readonly JwtSecurityTokenHandler _tokenHandler = new JwtSecurityTokenHandler();
-        private SymmetricSecurityKey _tokenSecurityKey;
-
-        public JwtUserTokenService(IOptionsMonitor<JwtConfiguration> jwtConfig, IClock clock, DatabaseContext database)
-        {
-            _jwtConfig = jwtConfig;
-            _clock = clock;
-
-            var key = database.JwtToken.Select(t => t.Key).SingleOrDefault();
-
-            if (key == null)
-            {
-                throw new InvalidOperationException(Resources.Services.UserTokenService.JwtKeyNotExist);
-            }
-
-            _tokenSecurityKey = new SymmetricSecurityKey(key);
-        }
-
-        public string GenerateToken(UserTokenInfo tokenInfo)
-        {
-            if (tokenInfo == null)
-                throw new ArgumentNullException(nameof(tokenInfo));
-
-            var config = _jwtConfig.CurrentValue;
-
-            var identity = new ClaimsIdentity();
-            identity.AddClaim(new Claim(ClaimTypes.NameIdentifier, tokenInfo.Id.ToString(CultureInfo.InvariantCulture.NumberFormat), ClaimValueTypes.Integer64));
-            identity.AddClaim(new Claim(VersionClaimType, tokenInfo.Version.ToString(CultureInfo.InvariantCulture.NumberFormat), ClaimValueTypes.Integer64));
-
-            var tokenDescriptor = new SecurityTokenDescriptor()
-            {
-                Subject = identity,
-                Issuer = config.Issuer,
-                Audience = config.Audience,
-                SigningCredentials = new SigningCredentials(_tokenSecurityKey, SecurityAlgorithms.HmacSha384),
-                IssuedAt = _clock.GetCurrentTime(),
-                Expires = tokenInfo.ExpireAt.GetValueOrDefault(_clock.GetCurrentTime().AddSeconds(config.DefaultExpireOffset)),
-                NotBefore = _clock.GetCurrentTime() // I must explicitly set this or it will use the current time by default and mock is not work in which case test will not pass.
-            };
-
-            var token = _tokenHandler.CreateToken(tokenDescriptor);
-            var tokenString = _tokenHandler.WriteToken(token);
-
-            return tokenString;
-        }
-
-
-        public UserTokenInfo VerifyToken(string token)
-        {
-            if (token == null)
-                throw new ArgumentNullException(nameof(token));
-
-            var config = _jwtConfig.CurrentValue;
-            try
-            {
-                var principal = _tokenHandler.ValidateToken(token, new TokenValidationParameters
-                {
-                    ValidateIssuer = true,
-                    ValidateAudience = true,
-                    ValidateIssuerSigningKey = true,
-                    ValidateLifetime = false,
-                    ValidIssuer = config.Issuer,
-                    ValidAudience = config.Audience,
-                    IssuerSigningKey = _tokenSecurityKey
-                }, out var t);
-
-                var idClaim = principal.FindFirstValue(ClaimTypes.NameIdentifier);
-                if (idClaim == null)
-                    throw new JwtUserTokenBadFormatException(token, JwtUserTokenBadFormatException.ErrorKind.NoIdClaim);
-                if (!long.TryParse(idClaim, out var id))
-                    throw new JwtUserTokenBadFormatException(token, JwtUserTokenBadFormatException.ErrorKind.IdClaimBadFormat);
-
-                var versionClaim = principal.FindFirstValue(VersionClaimType);
-                if (versionClaim == null)
-                    throw new JwtUserTokenBadFormatException(token, JwtUserTokenBadFormatException.ErrorKind.NoVersionClaim);
-                if (!long.TryParse(versionClaim, out var version))
-                    throw new JwtUserTokenBadFormatException(token, JwtUserTokenBadFormatException.ErrorKind.VersionClaimBadFormat);
-
-                var decodedToken = (JwtSecurityToken)t;
-                var exp = decodedToken.Payload.Exp;
-                DateTime? expireAt = null;
-                if (exp.HasValue)
-                {
-                    expireAt = EpochTime.DateTime(exp.Value);
-                }
-
-                return new UserTokenInfo
-                {
-                    Id = id,
-                    Version = version,
-                    ExpireAt = expireAt
-                };
-            }
-            catch (Exception e) when (e is SecurityTokenException || e is ArgumentException)
-            {
-                throw new JwtUserTokenBadFormatException(token, JwtUserTokenBadFormatException.ErrorKind.Other, e);
-            }
-        }
-    }
-}
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