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Copilot
ce9b2b4bff
**User Management Improvements:** * The `UserManagement` class now loads existing users from the user database during initialization, ensuring that the in-memory user list reflects the database state through the abstraction boundary. * The `IUserDatabase` interface now exposes `GetUsers()`, returning `UserManagementDataType` records instead of only user names. * `UserManagement.LoadUsersFromDatabase()` now consumes `IUserDatabase.GetUsers()` so custom user database implementations can provide persisted user metadata such as `UserConfiguration` and `Description`. * `LinqUserDatabase` implements `GetUsers()` and returns user records with the stored user name and default user-management metadata. `JsonUserDatabase` inherits this behavior through `LinqUserDatabase`. **Address Space Management:** * The server now properly removes the UserManagement node from the address space when user management is not enabled, preventing stale or orphaned nodes. **Test Coverage Enhancements:** * Added tests to verify that the UserManagement node is removed when user management is not present. * Added tests to confirm that `LinqUserDatabase.GetUsers()` returns the correct users. * Added tests to confirm that `UserManagement` starts with all users from the database, including custom `IUserDatabase` implementations that return full `UserManagementDataType` metadata. These changes keep user discovery on the `IUserDatabase` abstraction, remove the concrete-type dependency from startup, and allow existing users to be loaded with their associated management metadata.
584 lines
23 KiB
C#
584 lines
23 KiB
C#
/* ========================================================================
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* Copyright (c) 2005-2025 The OPC Foundation, Inc. All rights reserved.
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*
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* OPC Foundation MIT License 1.00
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* The complete license agreement can be found here:
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* http://opcfoundation.org/License/MIT/1.00/
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* ======================================================================*/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading;
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using Opc.Ua.Server.UserDatabase;
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namespace Opc.Ua.Server.UserManagement
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{
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/// <summary>
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/// Default in-memory <see cref="IUserManagement"/> implementation. Wraps
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/// an <see cref="IUserDatabase"/> for credential persistence and keeps
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/// the per-user <see cref="UserConfigurationMask"/> and description in
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/// memory.
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/// </summary>
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/// <remarks>
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/// Per Part 18 §6.4 "the management of these Users is server-specific" —
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/// this default keeps the metadata in memory across the server lifetime.
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/// Integrators that need persistence of the metadata implement
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/// <see cref="IUserManagement"/> directly and inject the instance via
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/// <see cref="IServerInternal.SetUserManagement"/>.
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/// </remarks>
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public sealed class UserManagement : IUserManagement, IDisposable
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{
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private readonly IUserDatabase m_userDatabase;
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private readonly Dictionary<string, UserMetadata> m_metadata
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= new(StringComparer.Ordinal);
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private readonly ReaderWriterLockSlim m_lock = new(LockRecursionPolicy.NoRecursion);
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private bool m_disposed;
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/// <summary>
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/// Creates a new <see cref="UserManagement"/> backed by
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/// <paramref name="userDatabase"/>.
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/// </summary>
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/// <param name="userDatabase">The user-credential persistence store.</param>
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/// <param name="passwordLength">
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/// Allowed password length range; defaults to {Low = 8, High = 256}.
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/// </param>
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/// <param name="passwordOptions">
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/// Password requirements / supported features advertised to clients.
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/// Defaults to <see cref="PasswordOptionsMask.SupportDisableUser"/>
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/// plus <see cref="PasswordOptionsMask.SupportInitialPasswordChange"/>
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/// plus <see cref="PasswordOptionsMask.SupportDescriptionForUser"/>.
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/// </param>
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/// <param name="passwordRestrictions">
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/// Optional human-readable description of password restrictions.
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/// </param>
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public UserManagement(
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IUserDatabase userDatabase,
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Range? passwordLength = null,
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PasswordOptionsMask? passwordOptions = null,
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LocalizedText? passwordRestrictions = null)
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{
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m_userDatabase = userDatabase ?? throw new ArgumentNullException(nameof(userDatabase));
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PasswordLength = passwordLength ?? new Range { Low = 8, High = 256 };
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PasswordOptions = passwordOptions
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?? (PasswordOptionsMask.SupportDisableUser |
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PasswordOptionsMask.SupportInitialPasswordChange |
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PasswordOptionsMask.SupportDescriptionForUser);
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PasswordRestrictions = passwordRestrictions;
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LoadUsersFromDatabase();
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}
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/// <inheritdoc/>
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public Range PasswordLength { get; }
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/// <inheritdoc/>
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public PasswordOptionsMask PasswordOptions { get; }
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/// <inheritdoc/>
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public LocalizedText? PasswordRestrictions { get; }
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/// <inheritdoc/>
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public event EventHandler<UserDeactivatedEventArgs>? UserDeactivated;
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/// <inheritdoc/>
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public IReadOnlyList<UserManagementDataType> SnapshotUsers()
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{
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m_lock.EnterReadLock();
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try
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{
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var list = new List<UserManagementDataType>(m_metadata.Count);
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foreach (KeyValuePair<string, UserMetadata> kv in m_metadata)
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{
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list.Add(new UserManagementDataType
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{
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UserName = kv.Key,
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UserConfiguration = (uint)kv.Value.Configuration,
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Description = kv.Value.Description
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});
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}
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return list;
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}
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finally
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{
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m_lock.ExitReadLock();
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}
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}
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/// <inheritdoc/>
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public ServiceResult AddUser(
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string userName,
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string password,
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UserConfigurationMask userConfiguration,
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string description)
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{
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if (string.IsNullOrEmpty(userName))
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{
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return new ServiceResult(StatusCodes.BadInvalidArgument,
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new LocalizedText("UserName must be non-empty."));
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}
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ServiceResult configValidation = ValidateConfigurationFlags(userConfiguration);
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if (ServiceResult.IsBad(configValidation))
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{
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return configValidation;
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}
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ServiceResult passwordValidation = ValidatePassword(password);
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if (ServiceResult.IsBad(passwordValidation))
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{
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return passwordValidation;
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}
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m_lock.EnterWriteLock();
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try
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{
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if (m_metadata.ContainsKey(userName))
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{
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return new ServiceResult(StatusCodes.BadAlreadyExists,
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new LocalizedText($"User '{userName}' already exists."));
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}
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if (!m_userDatabase.CreateUser(userName, GetPasswordBytes(password), []))
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{
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return new ServiceResult(StatusCodes.BadResourceUnavailable,
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new LocalizedText("User-database rejected the create operation."));
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}
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m_metadata[userName] = new UserMetadata(userConfiguration, description ?? string.Empty);
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}
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finally
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{
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m_lock.ExitWriteLock();
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}
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return ServiceResult.Good;
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}
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/// <inheritdoc/>
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public ServiceResult ModifyUser(
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string userName,
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bool modifyPassword,
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string password,
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bool modifyUserConfiguration,
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UserConfigurationMask userConfiguration,
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bool modifyDescription,
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string description,
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string? callingUserName)
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{
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if (string.IsNullOrEmpty(userName))
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{
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return new ServiceResult(StatusCodes.BadInvalidArgument);
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}
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bool willDisable = false;
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bool disabled;
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m_lock.EnterWriteLock();
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try
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{
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if (!m_metadata.TryGetValue(userName, out UserMetadata? existing))
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{
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return new ServiceResult(StatusCodes.BadNotFound,
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new LocalizedText($"User '{userName}' not found."));
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}
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UserConfigurationMask effectiveConfig = modifyUserConfiguration
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? userConfiguration
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: existing.Configuration;
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if (modifyUserConfiguration)
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{
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ServiceResult configValidation = ValidateConfigurationFlags(userConfiguration);
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if (ServiceResult.IsBad(configValidation))
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{
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return configValidation;
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}
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willDisable = (existing.Configuration & UserConfigurationMask.Disabled) == 0 &&
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(userConfiguration & UserConfigurationMask.Disabled) != 0;
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if (willDisable &&
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callingUserName != null &&
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string.Equals(callingUserName, userName, StringComparison.Ordinal))
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{
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return new ServiceResult(StatusCodes.BadInvalidSelfReference,
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new LocalizedText("The user to disable is the calling session's user."));
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}
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}
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if (modifyPassword)
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{
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ServiceResult passwordValidation = ValidatePassword(password);
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if (ServiceResult.IsBad(passwordValidation))
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{
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return passwordValidation;
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}
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// The IUserDatabase API only exposes ChangePassword which
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// requires the old password — admin password resets are
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// emulated by delete + recreate to keep the abstraction
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// stable. The previously assigned roles are snapshotted
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// and re-applied to preserve role assignments across the
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// reset (Part 18 §5.2.6 does not mandate role removal on
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// password change).
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//
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// KNOWN LIMITATION (see Docs/RoleBasedUserManagement.md):
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// this two-step is not atomic — if CreateUser fails after
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// DeleteUser succeeds, the user account is lost. The
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// built-in LinqUserDatabase / JsonUserDatabase delete and
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// create operations succeed unconditionally so this is
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// only a concern for custom IUserDatabase implementations
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// that may fail mid-reset.
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ICollection<Role> preservedRoles = SnapshotUserRolesSafe(userName);
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if (!m_userDatabase.DeleteUser(userName))
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{
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return new ServiceResult(StatusCodes.BadResourceUnavailable,
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new LocalizedText("User-database rejected the delete during password reset."));
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}
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if (!m_userDatabase.CreateUser(userName, GetPasswordBytes(password), preservedRoles))
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{
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// User has been deleted but recreate failed — surface
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// a clear error. There is no way to recover the
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// original password from IUserDatabase.
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m_metadata.Remove(userName);
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return new ServiceResult(StatusCodes.BadResourceUnavailable,
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new LocalizedText(
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"User-database rejected the create during password reset; " +
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"the user account has been removed."));
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}
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}
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disabled = (effectiveConfig & UserConfigurationMask.Disabled) != 0;
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m_metadata[userName] = new UserMetadata(
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effectiveConfig,
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modifyDescription ? description ?? string.Empty : existing.Description);
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}
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finally
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{
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m_lock.ExitWriteLock();
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}
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if (willDisable && disabled)
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{
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RaiseUserDeactivated(userName);
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}
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return ServiceResult.Good;
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}
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/// <inheritdoc/>
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public ServiceResult RemoveUser(string userName, string? callingUserName)
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{
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if (string.IsNullOrEmpty(userName))
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{
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return new ServiceResult(StatusCodes.BadInvalidArgument);
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}
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if (callingUserName != null &&
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string.Equals(callingUserName, userName, StringComparison.Ordinal))
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{
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return new ServiceResult(StatusCodes.BadInvalidSelfReference,
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new LocalizedText("The user to remove is the calling session's user."));
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}
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m_lock.EnterWriteLock();
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try
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{
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if (!m_metadata.TryGetValue(userName, out UserMetadata? existing))
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{
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return new ServiceResult(StatusCodes.BadNotFound);
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}
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if ((existing.Configuration & UserConfigurationMask.NoDelete) != 0)
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{
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return new ServiceResult(StatusCodes.BadNotSupported,
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new LocalizedText($"User '{userName}' is marked NoDelete."));
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}
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if (!m_userDatabase.DeleteUser(userName))
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{
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return new ServiceResult(StatusCodes.BadResourceUnavailable);
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}
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m_metadata.Remove(userName);
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}
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finally
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{
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m_lock.ExitWriteLock();
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}
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RaiseUserDeactivated(userName);
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return ServiceResult.Good;
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}
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/// <inheritdoc/>
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public ServiceResult ChangePassword(string userName, string oldPassword, string newPassword)
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{
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if (string.IsNullOrEmpty(userName))
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{
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return new ServiceResult(StatusCodes.BadInvalidArgument);
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}
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ServiceResult passwordValidation = ValidatePassword(newPassword);
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if (ServiceResult.IsBad(passwordValidation))
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{
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return passwordValidation;
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}
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if (string.Equals(oldPassword, newPassword, StringComparison.Ordinal))
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{
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return new ServiceResult(StatusCodes.BadAlreadyExists,
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new LocalizedText("New password matches the old password."));
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}
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m_lock.EnterReadLock();
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try
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{
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if (!m_metadata.TryGetValue(userName, out UserMetadata? metadata))
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{
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return new ServiceResult(StatusCodes.BadNotFound);
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}
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if ((metadata.Configuration & UserConfigurationMask.NoChangeByUser) != 0)
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{
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return new ServiceResult(StatusCodes.BadNotSupported,
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new LocalizedText($"User '{userName}' is marked NoChangeByUser."));
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}
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}
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finally
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{
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m_lock.ExitReadLock();
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}
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if (!m_userDatabase.ChangePassword(userName,
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GetPasswordBytes(oldPassword), GetPasswordBytes(newPassword)))
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{
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return new ServiceResult(StatusCodes.BadIdentityTokenInvalid,
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new LocalizedText("Old password does not match."));
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}
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m_lock.EnterWriteLock();
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try
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{
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if (m_metadata.TryGetValue(userName, out UserMetadata? current))
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{
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// Successful change clears the MustChangePassword bit.
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m_metadata[userName] = new UserMetadata(
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current.Configuration & ~UserConfigurationMask.MustChangePassword,
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current.Description);
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}
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}
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finally
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{
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m_lock.ExitWriteLock();
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}
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return ServiceResult.Good;
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}
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/// <inheritdoc/>
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public bool MustChangePassword(string userName)
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{
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if (string.IsNullOrEmpty(userName))
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{
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return false;
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}
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m_lock.EnterReadLock();
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try
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{
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return m_metadata.TryGetValue(userName, out UserMetadata? meta) &&
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(meta.Configuration & UserConfigurationMask.MustChangePassword) != 0;
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}
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finally
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{
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m_lock.ExitReadLock();
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}
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}
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/// <inheritdoc/>
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public bool IsUserActive(string userName)
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{
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if (string.IsNullOrEmpty(userName))
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{
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return false;
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}
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m_lock.EnterReadLock();
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try
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{
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return m_metadata.TryGetValue(userName, out UserMetadata? meta) &&
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(meta.Configuration & UserConfigurationMask.Disabled) == 0;
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}
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finally
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{
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m_lock.ExitReadLock();
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}
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}
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private void LoadUsersFromDatabase()
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{
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foreach (UserManagementDataType user in m_userDatabase.GetUsers())
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{
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if (string.IsNullOrEmpty(user.UserName))
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{
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continue;
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}
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m_metadata[user.UserName] = new UserMetadata(
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(UserConfigurationMask)user.UserConfiguration,
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user.Description ?? string.Empty);
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}
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}
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private ServiceResult ValidatePassword(string password)
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{
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password ??= string.Empty;
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int low = (int)PasswordLength.Low;
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int high = (int)PasswordLength.High;
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if (low > 0 && password.Length < low)
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{
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return new ServiceResult(StatusCodes.BadOutOfRange,
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new LocalizedText($"Password must be at least {low} characters long."));
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}
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if (high > 0 && password.Length > high)
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{
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return new ServiceResult(StatusCodes.BadOutOfRange,
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new LocalizedText($"Password must be at most {high} characters long."));
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}
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if ((PasswordOptions & PasswordOptionsMask.RequiresUpperCaseCharacters) != 0 &&
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!password.Any(char.IsUpper))
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{
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return new ServiceResult(StatusCodes.BadOutOfRange,
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new LocalizedText("Password must contain at least one upper-case character."));
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}
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if ((PasswordOptions & PasswordOptionsMask.RequiresLowerCaseCharacters) != 0 &&
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!password.Any(char.IsLower))
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{
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return new ServiceResult(StatusCodes.BadOutOfRange,
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new LocalizedText("Password must contain at least one lower-case character."));
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}
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if ((PasswordOptions & PasswordOptionsMask.RequiresDigitCharacters) != 0 &&
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!password.Any(char.IsDigit))
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{
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return new ServiceResult(StatusCodes.BadOutOfRange,
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new LocalizedText("Password must contain at least one digit."));
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}
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if ((PasswordOptions & PasswordOptionsMask.RequiresSpecialCharacters) != 0 &&
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password.All(char.IsLetterOrDigit))
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{
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return new ServiceResult(StatusCodes.BadOutOfRange,
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new LocalizedText("Password must contain at least one special character."));
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}
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return ServiceResult.Good;
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}
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private ServiceResult ValidateConfigurationFlags(UserConfigurationMask config)
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{
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if ((config & UserConfigurationMask.MustChangePassword) != 0 &&
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(config & UserConfigurationMask.NoChangeByUser) != 0)
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{
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return new ServiceResult(StatusCodes.BadConfigurationError,
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new LocalizedText("MustChangePassword and NoChangeByUser are mutually exclusive."));
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}
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const UserConfigurationMask supported =
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UserConfigurationMask.NoDelete |
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UserConfigurationMask.Disabled |
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UserConfigurationMask.NoChangeByUser |
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UserConfigurationMask.MustChangePassword;
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UserConfigurationMask unsupported = config & ~supported;
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if (unsupported != 0)
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{
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return new ServiceResult(StatusCodes.BadNotSupported,
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new LocalizedText($"User configuration has unsupported flags: {unsupported}."));
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}
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// Check against this manager's PasswordOptions advertisement.
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if ((config & UserConfigurationMask.MustChangePassword) != 0 &&
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(PasswordOptions & PasswordOptionsMask.SupportInitialPasswordChange) == 0)
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{
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return new ServiceResult(StatusCodes.BadNotSupported,
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new LocalizedText("Server does not support MustChangePassword."));
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}
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if ((config & UserConfigurationMask.Disabled) != 0 &&
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(PasswordOptions & PasswordOptionsMask.SupportDisableUser) == 0)
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{
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return new ServiceResult(StatusCodes.BadNotSupported,
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new LocalizedText("Server does not support disabling users."));
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}
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if ((config & UserConfigurationMask.NoDelete) != 0 &&
|
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(PasswordOptions & PasswordOptionsMask.SupportDisableDeleteForUser) == 0)
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|
{
|
|
return new ServiceResult(StatusCodes.BadNotSupported,
|
|
new LocalizedText("Server does not support NoDelete."));
|
|
}
|
|
if ((config & UserConfigurationMask.NoChangeByUser) != 0 &&
|
|
(PasswordOptions & PasswordOptionsMask.SupportNoChangeForUser) == 0)
|
|
{
|
|
return new ServiceResult(StatusCodes.BadNotSupported,
|
|
new LocalizedText("Server does not support NoChangeByUser."));
|
|
}
|
|
return ServiceResult.Good;
|
|
}
|
|
|
|
private void RaiseUserDeactivated(string userName)
|
|
{
|
|
UserDeactivated?.Invoke(this, new UserDeactivatedEventArgs(userName));
|
|
}
|
|
|
|
private static byte[] GetPasswordBytes(string password)
|
|
{
|
|
return Encoding.UTF8.GetBytes(password ?? string.Empty);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Reads the current set of roles for <paramref name="userName"/>
|
|
/// from the user database, swallowing the <see cref="ArgumentException"/>
|
|
/// some implementations throw when the user is unknown and returning
|
|
/// an empty collection in that case. Used to preserve roles across
|
|
/// admin password resets (see <see cref="ModifyUser"/>).
|
|
/// </summary>
|
|
private ICollection<Role> SnapshotUserRolesSafe(string userName)
|
|
{
|
|
try
|
|
{
|
|
return m_userDatabase.GetUserRoles(userName) ?? [];
|
|
}
|
|
catch (ArgumentException)
|
|
{
|
|
return [];
|
|
}
|
|
}
|
|
|
|
private sealed record UserMetadata(UserConfigurationMask Configuration, string Description);
|
|
|
|
/// <inheritdoc/>
|
|
public void Dispose()
|
|
{
|
|
if (m_disposed)
|
|
{
|
|
return;
|
|
}
|
|
m_disposed = true;
|
|
m_lock.Dispose();
|
|
}
|
|
}
|
|
}
|