Endpoint authorization

Tokens are validated for some of the endpoints. Need to add other measures to rule out bogus tokens.

Controllers/Managers/SongManager.cs

@@ -220,8 +220,9 @@ namespace Icarus.Controllers.Managers
 
             song.SongDirectory = _tempDirectoryRoot;
             song.DateCreated = DateTime.Now;
+            var tempPath = song.SongPath();
 
-            using (var filestream = new FileStream(song.SongPath(), FileMode.Create))
+            using (var filestream = new FileStream(tempPath, FileMode.Create))
             {
                 _logger.Info("Saving song to temporary directory");
                 await songFile.CopyToAsync(filestream);
@@ -246,11 +247,22 @@ namespace Icarus.Controllers.Managers
 
             using (var fileStream = new FileStream(filePath, FileMode.Create))
             {
-                var songBytes = await System.IO.File.ReadAllBytesAsync(song.SongPath());
+                var songBytes = await System.IO.File.ReadAllBytesAsync(tempPath);
 
+                try
+                {
+                    if (!System.IO.File.Exists(filePath))
+                    {
                         await System.IO.File.WriteAllBytesAsync(filePath, songBytes);
-                System.IO.File.Delete(song.SongPath());
+                        System.IO.File.Delete(tempPath);
-                song.SongDirectory = dirMgr.SongDirectory;
+                    }
+                }
+                catch (Exception ex)
+                {
+                    var msg = ex.Message;
+                    _logger.Error($"An error occurred: {msg}");
+                }
+                // song.SongDirectory = dirMgr.SongDirectory;
 
                 _logger.Info("Song successfully saved to filesystem");
             }

Controllers/Managers/TokenManager.cs

@@ -20,13 +20,26 @@ using Icarus.Models;
 
 namespace Icarus.Controllers.Managers
 {
+    #region Classes
+    /**
+    {
+  "scope":"download:songs read:song_details upload:songs delete:songs read:albums read:artists update:songs stream:songs read:genre read:year download:cover_art",
+  "exp":1661616071,
+  "aud":"http://localhost:5002",
+  "iss":"http://localhost:5002",
+  "iat":1661529671
+}
+    */
+
     public class TokenManager : BaseManager
     {
         #region Fields
         private string _clientId;
         private string _clientSecret;
         private string _privateKeyPath;
+        private string _privateKey;
         private string _publicKeyPath;
+        private string _publicKey;
         private string _audience;
         private string _grantType;
         private string _url;
@@ -70,7 +83,7 @@ namespace Icarus.Controllers.Managers
 
             _logger.Info("Deserializing response");
             var tokenResult = JsonConvert
-                .DeserializeObject<Token>(response.Content);
+                .DeserializeObject<TokenTierOne>(response.Content);
             _logger.Info("Response deserialized");
 
             return new LoginResult
@@ -84,7 +97,7 @@ namespace Icarus.Controllers.Managers
 
         public LoginResult LogIn(User user)
         {
-            var tokenResult = new Token();
+            var tokenResult = new TokenTierOne();
             tokenResult.TokenType = "Jwt";
 
             var privateKey = ReadKeyContent(_privateKeyPath).Result;
@@ -110,6 +123,50 @@ namespace Icarus.Controllers.Managers
             };
         }
 
+        public bool IsTokenValid(string scope, string accessToken)
+        {
+            var result = false;
+            var token = DecodeToken(accessToken);
+
+            if (token == null)
+            {
+                return result;
+            }
+
+            result = (!token.TokenExpired() && token.ContainsScope(scope)) ? true : false;
+
+            // What would make a token valid?
+            // 1. The expiration date must be before the current date
+            // 2. The desired scope must be part of the scopes within the access token
+            // 3. Must be able to be decoded
+
+            return result;
+        }
+
+        public Token? DecodeToken(string accessToken)
+        {
+            var rsaParams = GetRSAPublic(_publicKey);
+            Token tok = null;
+
+            using (var rsa = new RSACryptoServiceProvider())
+            {
+                rsa.ImportParameters(rsaParams);
+
+                IJsonSerializer serializer = new JsonNetSerializer();
+                IDateTimeProvider provider = new UtcDateTimeProvider();
+                IJwtValidator validator = new JwtValidator(serializer, provider);
+                IBase64UrlEncoder urlEncoder = new JwtBase64UrlEncoder();
+                var algorithm = new JWT.Algorithms.RS256Algorithm(rsa);
+                IJwtDecoder decoder = new JwtDecoder(serializer, validator, urlEncoder, algorithm);
+                
+                var json = decoder.Decode(accessToken);
+                tok = JsonConvert.DeserializeObject<Token>(json);
+            }
+
+
+            return tok;
+        }
+
 
         private string AllScopes()
         {
@@ -269,6 +326,8 @@ namespace Icarus.Controllers.Managers
             _url = $"https://{_config["Auth0:Domain"]}";
             _privateKeyPath = _config["RSAKeys:PrivateKeyPath"];
             _publicKeyPath = _config["RSAKeys:PublicKeyPath"];
+            _privateKey = System.IO.File.ReadAllText(_privateKeyPath);
+            _publicKey = System.IO.File.ReadAllText(_publicKeyPath);
 
             PrintCredentials();
         }
@@ -299,7 +358,7 @@ namespace Icarus.Controllers.Managers
             [JsonProperty("grant_type")]
             public string GrantType { get; set; }
         }
-        private class Token
+        private class TokenTierOne
         {
             [JsonProperty("access_token")]
             public string AccessToken { get; set; }
@@ -310,4 +369,5 @@ namespace Icarus.Controllers.Managers
         }
         #endregion
     }
+    #endregion
 }

Controllers/v1/SongController.cs

@@ -43,10 +43,40 @@ namespace Icarus.Controllers.V1
         #endregion
 
 
+        #region Methods
+        private string ParseBearerTokenFromHeader()
+        {
+            var token = string.Empty;
+            const string tokenType = "Bearer";
+
+            var req = Request;
+            var auth = req.Headers.Authorization; 
+            var val = auth.ToString();
+
+            if (val.Contains(tokenType) && val.Split(" ").Count() > 1)
+            {
+                var split = val.Split(" ");
+                token = split[1];
+            }
+
+
+            return token;
+        }
+        #region HTTP Endpoints
+
+
         [HttpGet]
-        [Authorize("read:song_details")]
+        // [Authorize("read:song_details")]
         public IActionResult Get()
         {
+            var token = ParseBearerTokenFromHeader();
+            var tokMgr = new TokenManager(_config);
+
+            if (!tokMgr.IsTokenValid("read:song_details", token))
+            {
+                return StatusCode(401, "Not allowed");
+            }
+
             List<Song> songs = new List<Song>();
             Console.WriteLine("Attemtping to retrieve songs");
             _logger.LogInformation("Attempting to retrieve songs");
@@ -100,5 +130,7 @@ namespace Icarus.Controllers.V1
 
             return Ok(songRes);
         }
+        #endregion
+        #endregion
     }
 }

Controllers/v1/SongDataController.cs

@@ -47,6 +47,27 @@ namespace Icarus.Controllers.V1
         #endregion
 
 
+        private string ParseBearerTokenFromHeader()
+        {
+            var token = string.Empty;
+            const string tokenType = "Bearer";
+            const string otherTokenType = "Jwt";
+
+            var req = Request;
+            var auth = req.Headers.Authorization; 
+            var val = auth.ToString();
+
+            if (val.Contains(tokenType) && val.Split(" ").Count() > 1 ||
+                val.Contains(otherTokenType) && val.Split(" ").Count() > 1)
+            {
+                var split = val.Split(" ");
+                token = split[1];
+            }
+
+
+            return token;
+        }
+
 
         [HttpGet("download/{id}")]
         [Route("private-scoped")]
@@ -112,9 +133,17 @@ namespace Icarus.Controllers.V1
         //
         [HttpPost("upload/with/data")]
         [Route("private-scoped")]
-        [Authorize("upload:songs")]
+        // [Authorize("upload:songs")]
         public async Task<IActionResult> Post ([FromForm] UploadSongWithDataForm up)
         {
+            var token = ParseBearerTokenFromHeader();
+            var tokMgr = new TokenManager(_config);
+
+            if (!tokMgr.IsTokenValid("upload:songs", token))
+            {
+                return StatusCode(401, "Not allowed");
+            }
+
             try
             {
                 if (up.SongData.Length > 0 && up.CoverArtData.Length > 0 && !string.IsNullOrEmpty(up.SongFile))

Controllers/v1/SongStreamController.cs

@@ -13,6 +13,7 @@ using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Logging;
 
 using Icarus.Models;
+using Icarus.Controllers.Managers;
 using Icarus.Database.Contexts;
 
 namespace Icarus.Controllers.V1
@@ -42,11 +43,40 @@ namespace Icarus.Controllers.V1
         #endregion
 
 
+        private string ParseBearerTokenFromHeader()
+        {
+            var token = string.Empty;
+            const string tokenType = "Bearer";
+
+            var req = Request;
+            var auth = req.Headers.Authorization; 
+            var val = auth.ToString();
+
+            if (val.Contains(tokenType) && val.Split(" ").Count() > 1)
+            {
+                var split = val.Split(" ");
+                token = split[1];
+            }
+
+
+            return token;
+        }
+
         #region HTTP endpoints
         [HttpGet("{id}")]
-        [Authorize("stream:songs")]
+        // [Authorize("stream:songs")]
         public async Task<IActionResult> Get(int id)
         {
+            var token = ParseBearerTokenFromHeader();
+            var tokMgr = new TokenManager(_config);
+
+            /**
+            if (!tokMgr.IsTokenValid("stream:songs", token))
+            {
+                return StatusCode(401, "Not allowed");
+            }
+            */
+
             var context = new SongContext(_config.GetConnectionString("DefaultConnection"));
 
             var song = context.Songs.FirstOrDefault(sng => sng.SongID == id);

Models/Token.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Linq;
+
+using Newtonsoft.Json;
+
+
+namespace Icarus.Models
+{
+    public class Token
+    {
+        #region Properties
+        [JsonProperty("scope")]
+        public string Scope { get; set; }
+        [JsonProperty("exp")]
+        public int Expiration { get; set; }
+        [JsonProperty("aud")]
+        public string Audience { get; set; }
+        [JsonProperty("iss")]
+        public string Issuer { get; set; }
+        [JsonProperty("iat")]
+        public int Issued { get; set; }
+        #endregion
+    
+        #region Methods
+        public bool TokenExpired()
+        {
+            var result = false;
+            var currentDate = DateTime.Now;
+
+            var currentDateInSeconds = Math.Floor((currentDate - DateTime.UnixEpoch).TotalSeconds);
+
+            result = (currentDateInSeconds >= Expiration) ? true : false;
+
+            return result;
+        }
+
+        public bool ContainsScope(string desiredScope)
+        {
+            var result = false;
+            result = Scope.Contains(desiredScope);
+
+            return result;
+        }
+        #endregion
+    }
+}

Startup.cs

@@ -151,6 +151,7 @@ namespace Icarus
             var domain = $"https://{auth_id}/";
             var audience = Configuration["Auth0:ApiIdentifier"];
 
+            /**
             services
                 .AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
                 .AddJwtBearer(options => 
@@ -159,7 +160,6 @@ namespace Icarus
                     options.Audience = audience;
                 });
 
-            /**
             services.AddAuthorization(options =>
             {
                 options.AddPolicy("download:songs", policy =>