mirror of
https://github.com/jellyfin/jellyfin.git
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207 lines
8.2 KiB
C#
207 lines
8.2 KiB
C#
using System;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using MediaBrowser.Controller.Authentication;
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using MediaBrowser.Controller.Entities;
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using MediaBrowser.Model.Cryptography;
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namespace Emby.Server.Implementations.Library
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{
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public class DefaultAuthenticationProvider : IAuthenticationProvider, IRequiresResolvedUser
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{
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private readonly ICryptoProvider _cryptographyProvider;
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public DefaultAuthenticationProvider(ICryptoProvider crypto)
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{
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_cryptographyProvider = crypto;
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}
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public string Name => "Default";
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public bool IsEnabled => true;
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//This is dumb and an artifact of the backwards way auth providers were designed.
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//This version of authenticate was never meant to be called, but needs to be here for interface compat
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//Only the providers that don't provide local user support use this
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public Task<ProviderAuthenticationResult> Authenticate(string username, string password)
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{
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throw new NotImplementedException();
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}
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//This is the verson that we need to use for local users. Because reasons.
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public Task<ProviderAuthenticationResult> Authenticate(string username, string password, User resolvedUser)
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{
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bool success = false;
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if (resolvedUser == null)
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{
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throw new Exception("Invalid username or password");
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}
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//As long as jellyfin supports passwordless users, we need this little block here to accomodate
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if (IsPasswordEmpty(resolvedUser, password))
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{
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return Task.FromResult(new ProviderAuthenticationResult
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{
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Username = username
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});
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}
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ConvertPasswordFormat(resolvedUser);
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byte[] passwordbytes = Encoding.UTF8.GetBytes(password);
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PasswordHash readyHash = new PasswordHash(resolvedUser.Password);
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byte[] CalculatedHash;
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string CalculatedHashString;
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if (_cryptographyProvider.GetSupportedHashMethods().Contains(readyHash.Id))
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{
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if (String.IsNullOrEmpty(readyHash.Salt))
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{
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CalculatedHash = _cryptographyProvider.ComputeHash(readyHash.Id, passwordbytes);
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CalculatedHashString = BitConverter.ToString(CalculatedHash).Replace("-", string.Empty);
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}
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else
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{
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CalculatedHash = _cryptographyProvider.ComputeHash(readyHash.Id, passwordbytes, readyHash.SaltBytes);
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CalculatedHashString = BitConverter.ToString(CalculatedHash).Replace("-", string.Empty);
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}
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if (CalculatedHashString == readyHash.Hash)
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{
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success = true;
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//throw new Exception("Invalid username or password");
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}
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}
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else
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{
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throw new Exception(String.Format($"Requested crypto method not available in provider: {readyHash.Id}"));
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}
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//var success = string.Equals(GetPasswordHash(resolvedUser), GetHashedString(resolvedUser, password), StringComparison.OrdinalIgnoreCase);
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if (!success)
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{
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throw new Exception("Invalid username or password");
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}
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return Task.FromResult(new ProviderAuthenticationResult
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{
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Username = username
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});
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}
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//This allows us to move passwords forward to the newformat without breaking. They are still insecure, unsalted, and dumb before a password change
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//but at least they are in the new format.
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private void ConvertPasswordFormat(User user)
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{
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if (!string.IsNullOrEmpty(user.Password))
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{
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if (!user.Password.Contains("$"))
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{
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string hash = user.Password;
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user.Password = String.Format("$SHA1${0}", hash);
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}
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if (user.EasyPassword != null && !user.EasyPassword.Contains("$"))
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{
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string hash = user.EasyPassword;
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user.EasyPassword = string.Format("$SHA1${0}", hash);
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}
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}
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}
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public Task<bool> HasPassword(User user)
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{
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var hasConfiguredPassword = !IsPasswordEmpty(user, GetPasswordHash(user));
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return Task.FromResult(hasConfiguredPassword);
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}
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private bool IsPasswordEmpty(User user, string password)
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{
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if (string.IsNullOrEmpty(user.Password))
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{
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return string.IsNullOrEmpty(password);
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}
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return false;
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}
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public Task ChangePassword(User user, string newPassword)
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{
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ConvertPasswordFormat(user);
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//This is needed to support changing a no password user to a password user
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if (string.IsNullOrEmpty(user.Password))
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{
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PasswordHash newPasswordHash = new PasswordHash(_cryptographyProvider);
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newPasswordHash.SaltBytes = _cryptographyProvider.GenerateSalt();
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newPasswordHash.Salt = PasswordHash.ConvertToByteString(newPasswordHash.SaltBytes);
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newPasswordHash.Id = _cryptographyProvider.DefaultHashMethod;
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newPasswordHash.Hash = GetHashedStringChangeAuth(newPassword, newPasswordHash);
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user.Password = newPasswordHash.ToString();
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return Task.CompletedTask;
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}
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PasswordHash passwordHash = new PasswordHash(user.Password);
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if (passwordHash.Id == "SHA1" && string.IsNullOrEmpty(passwordHash.Salt))
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{
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passwordHash.SaltBytes = _cryptographyProvider.GenerateSalt();
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passwordHash.Salt = PasswordHash.ConvertToByteString(passwordHash.SaltBytes);
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passwordHash.Id = _cryptographyProvider.DefaultHashMethod;
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passwordHash.Hash = GetHashedStringChangeAuth(newPassword, passwordHash);
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}
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else if (newPassword != null)
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{
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passwordHash.Hash = GetHashedString(user, newPassword);
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}
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if (string.IsNullOrWhiteSpace(passwordHash.Hash))
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{
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throw new ArgumentNullException(nameof(passwordHash.Hash));
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}
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user.Password = passwordHash.ToString();
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return Task.CompletedTask;
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}
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public string GetPasswordHash(User user)
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{
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return user.Password;
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}
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public string GetHashedStringChangeAuth(string newPassword, PasswordHash passwordHash)
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{
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passwordHash.HashBytes = Encoding.UTF8.GetBytes(newPassword);
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return PasswordHash.ConvertToByteString(_cryptographyProvider.ComputeHash(passwordHash));
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}
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/// <summary>
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/// Gets the hashed string.
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/// </summary>
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public string GetHashedString(User user, string str)
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{
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PasswordHash passwordHash;
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if (String.IsNullOrEmpty(user.Password))
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{
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passwordHash = new PasswordHash(_cryptographyProvider);
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}
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else
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{
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ConvertPasswordFormat(user);
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passwordHash = new PasswordHash(user.Password);
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}
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if (passwordHash.SaltBytes != null)
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{
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//the password is modern format with PBKDF and we should take advantage of that
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passwordHash.HashBytes = Encoding.UTF8.GetBytes(str);
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return PasswordHash.ConvertToByteString(_cryptographyProvider.ComputeHash(passwordHash));
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}
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else
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{
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//the password has no salt and should be called with the older method for safety
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return PasswordHash.ConvertToByteString(_cryptographyProvider.ComputeHash(passwordHash.Id, Encoding.UTF8.GetBytes(str)));
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}
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}
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}
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}
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