Initial commit

2022-09-04 12:03:44 +02:00
commit 15f48d259f
91 changed files with 22716 additions and 0 deletions
--- a/Backend/Repositorys/TokenRepository.cs
+++ b/Backend/Repositorys/TokenRepository.cs
@@ -0,0 +1,92 @@
+using System.Text;
+using Backend.Entitys;
+using Backend.Security.Authentication;
+using Microsoft.AspNetCore.Cryptography.KeyDerivation;
+using Microsoft.Extensions.Options;
+
+namespace Backend.Repositorys;
+
+public class TokenRepository {
+    private readonly JwtTokenAuthenticationOptions _options;
+    private readonly DatabaseContext _context;
+
+    public TokenRepository(IOptions<JwtTokenAuthenticationOptions> options, DatabaseContext context) {
+        _options = options.Value;
+        _context = context;
+    }
+
+    public RefreshToken GetRefreshToken(Guid refreshTokenId) {
+        if (string.IsNullOrEmpty(refreshTokenId.ToString())) return null;
+        return _context.RefreshTokens.SingleOrDefault(token => token.Id == refreshTokenId);
+    }
+
+    public AccessToken GetAccessToken(Guid accessTokenId) {
+        if (string.IsNullOrEmpty(accessTokenId.ToString())) return null;
+        return _context.AccessTokens.SingleOrDefault(token => token.Id == accessTokenId);
+    }
+
+    public IEnumerable<AccessToken> GetAccessTokens(Guid refreshTokenId) {
+        if (string.IsNullOrEmpty(refreshTokenId.ToString())) return ArraySegment<AccessToken>.Empty;
+        return _context.AccessTokens.Where(token => token.RefreshTokenId == refreshTokenId);
+    }
+
+    public bool ValidateAccessToken(Guid accessTokenId) {
+        AccessToken token = GetAccessToken(accessTokenId);
+        if (token == null) return false;
+        TimeSpan span = token.ExpirationDate - DateTime.Now;
+        return span.TotalMilliseconds > 0;
+    }
+
+    public bool ValidateRefreshToken(Guid refreshTokenId) {
+        RefreshToken token = GetRefreshToken(refreshTokenId);
+        if (token == null) return false;
+        TimeSpan span = token.ExpirationDate - DateTime.Now;
+        return span.TotalMilliseconds > 0;
+    }
+
+    public RefreshToken CreateRefreshToken(Guid userId) {
+        RefreshToken token = new RefreshToken {
+            UserId = userId, Id = Guid.NewGuid(),
+            ExpirationDate = DateTime.Now.Add(new TimeSpan(int.Parse(_options.RefreshTokenExpirationTimeInHours), 0, 0))
+        };
+        _context.RefreshTokens.Add(token);
+        _context.SaveChanges();
+        return token;
+    }
+
+    public AccessToken CreateAccessToken(Guid refreshTokenId) {
+        AccessToken token = new AccessToken {
+            RefreshTokenId = refreshTokenId, Id = Guid.NewGuid(),
+            ExpirationDate = DateTime.Now
+                .Add(new TimeSpan(0, int.Parse(_options.AccessTokenExpirationTimeInMinutes), 0))
+        };
+        _context.AccessTokens.Add(token);
+        _context.SaveChanges();
+        return token;
+    }
+
+    public void DeleteUserTokens(Guid userId) {
+        List<RefreshToken> refreshTokens = _context.RefreshTokens.Where(token => token.UserId == userId).ToList();
+        refreshTokens.ForEach(token => DeleteRefreshToken(token.Id));
+        _context.SaveChanges();
+    }
+
+    public void DeleteRefreshToken(Guid refreshTokenId) {
+        _context.RefreshTokens.RemoveRange(_context.RefreshTokens.Where(token => token.Id == refreshTokenId));
+        _context.AccessTokens.RemoveRange(_context.AccessTokens.Where(token => token.RefreshTokenId == refreshTokenId));
+    }
+    
+    public static string Hash128(string plainText, string salt) {
+        try {
+            string hashed = Convert.ToBase64String(KeyDerivation.Pbkdf2(
+                password: plainText,
+                salt: Encoding.Default.GetBytes(salt),
+                prf: KeyDerivationPrf.HMACSHA256,
+                iterationCount: 100000,
+                numBytesRequested: 256 / 8
+            ));
+
+            return hashed;
+        } catch (Exception) { return ""; }
+    }
+}