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Marc Schier 296a904f34 Add full OPC UA Part 18 (Role management) support (#3778)
* role management compliant with OPC UA Part 18

Server-side:
- New IRoleManager / RoleManager with spec-correct status codes
  (Bad_AlreadyExists, Bad_NodeIdUnknown, Bad_RequestNotAllowed,
  Bad_NotFound) for every mutator per Part 18 4.2 / 4.4.
- Pre-populate default identities for the three reserved well-known
  roles per Part 18 4.3 (Anonymous, AuthenticatedUser,
  TrustedApplication).
- Reject mutations on reserved roles with Bad_RequestNotAllowed.
- Validate IdentityMappingRuleType per Part 18 4.4.3 (empty criteria
  for Anonymous/AuthenticatedUser/TrustedApplication; upper-case hex
  for Thumbprint; Name=Value grammar for X509Subject).
- Honour Part 18 4.4.2 default-field-as-wildcard EndpointType
  comparisons; tighten TrustedApplication/Application rules to
  require trusted certificate + signed channel.
- Introduce CustomConfiguration flag per Part 18 4.4.1.
- Add IRoleManager.RoleConfigurationChanged event raised after every
  successful mutation per Part 18 4.4.1.
- Make RoleEntry an immutable snapshot.

Address-space binding (typed proxies):
- RoleStateBinding switched from stringly-typed OnCallMethod2 plumbing
  to the source-generated typed proxies (RoleSetState, RoleState,
  AddRoleMethodState, AddIdentityMethodState, ...).
- DiagnosticsNodeManager.AddBehaviourToPredefinedNodeAsync upgrades
  passive BaseObjectState nodes of RoleSetType / RoleType to the
  typed RoleSetState / RoleState proxies at predefined-node load time.
- New RoleAuthorizationGate.CheckAdmin centralizes SecurityAdmin role
  plus SignAndEncrypt enforcement per Part 18 4.2 / 4.4 / 5.2.
- Bound writable ApplicationsExclude / EndpointsExclude /
  CustomConfiguration with the same auth gate.
- Raise RoleMappingRuleChangedAuditEventType from every successful
  mutator (Part 18 4.5) via the existing AuditEvents helper.

Client library:
- New Opc.Ua.Client.Roles.RoleManagementClient + IRoleManagementClient
  + RoleInfo + SessionRoleExtensions.OpenRoleManagementClient.
- Covers list / read / add / remove role, identity, application,
  endpoint operations plus Set*Exclude via Write Service.

Tests:
- New RoleManagerTests.cs - 37 NUnit tests for pre-populated roles,
  reserved-role immutability, spec-correct status codes, criteria
  validation, ResolveGrantedRoles, exclude semantics,
  CustomConfiguration, AddRole well-known NodeId reuse, and
  RoleConfigurationChanged event.

Documentation:
- Rewrite Docs/RoleBasedUserManagement.md as a Part 18 compliance
  reference (status-code matrix, client examples, known limitations).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add Part 18 5 UserManagement implementation

Server-side:
- New IUserManagement interface (Opc.Ua.Server.UserManagement) modelling
  Part 18 5.2.1 surface: PasswordLength, PasswordOptions, PasswordRestrictions,
  SnapshotUsers, AddUser, ModifyUser, RemoveUser, ChangePassword,
  MustChangePassword, IsUserActive, UserDeactivated event.
- Default UserManagement implementation wraps the existing IUserDatabase
  and stores per-user UserConfigurationMask + description in memory.
  Validates passwords against PasswordLength + character-class flags
  from PasswordOptions; honours Part 18 5.2 result codes
  (Bad_AlreadyExists, Bad_NotFound, Bad_OutOfRange, Bad_NotSupported,
  Bad_ConfigurationError, Bad_InvalidSelfReference,
  Bad_IdentityTokenInvalid).
- ChangePassword clears the MustChangePassword bit on success.
- New UserManagementBinding wires the typed source-generated proxies
  (UserManagementState, AddUserMethodState, ModifyUserMethodState,
  RemoveUserMethodState, ChangePasswordMethodState) - typed OnCallAsync
  delegates everywhere; admin gate via RoleAuthorizationGate.CheckAdmin;
  ChangePassword gated via RoleAuthorizationGate.CheckSelfUserName;
  closes active sessions for deactivated users via ISessionManager.
- ConfigurationNodeManager.AddBehaviourToPredefinedNodeAsync upgrades
  the passive UserManagement object to the typed UserManagementState
  proxy at predefined-node load time; CreateServerConfiguration invokes
  UserManagementBinding.Bind when an IUserManagement was injected.
- IServerInternal gains UserManagement getter + SetUserManagement
  injector.

Tests:
- New Tests/Opc.Ua.Server.Tests/UserManagementTests.cs - 18 NUnit tests
  covering AddUser happy path, duplicate / password-length / config-flag
  validation, RemoveUser non-existent / self-reference / NoDelete,
  ModifyUser self-disable / disable-other UserDeactivated event,
  ChangePassword happy path / same-as-old / wrong-old /
  MustChangePassword bit clearing / NoChangeByUser rejection,
  IsUserActive on disabled vs active users.

Documentation:
- Update Docs/RoleBasedUserManagement.md with a User Management section
  including the spec result-code matrix, example wiring code, and
  reduce known limitations - UserManagement is no longer a limitation.
2026-05-20 05:51:17 +02:00

105 lines
3.9 KiB
C#

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using System;
namespace Opc.Ua.Server
{
/// <summary>
/// Identifies the kind of role-configuration change that occurred.
/// </summary>
public enum RoleConfigurationChangeKind
{
/// <summary>An identity-mapping rule was added.</summary>
IdentityAdded,
/// <summary>An identity-mapping rule was removed.</summary>
IdentityRemoved,
/// <summary>An application URI was added.</summary>
ApplicationAdded,
/// <summary>An application URI was removed.</summary>
ApplicationRemoved,
/// <summary>An endpoint was added.</summary>
EndpointAdded,
/// <summary>An endpoint was removed.</summary>
EndpointRemoved,
/// <summary>The <c>ApplicationsExclude</c> flag was changed.</summary>
ApplicationsExcludeChanged,
/// <summary>The <c>EndpointsExclude</c> flag was changed.</summary>
EndpointsExcludeChanged,
/// <summary>The <c>CustomConfiguration</c> flag was changed.</summary>
CustomConfigurationChanged,
/// <summary>A new role was created via <c>AddRole</c>.</summary>
RoleAdded,
/// <summary>A role was removed via <c>RemoveRole</c>.</summary>
RoleRemoved
}
/// <summary>
/// Event payload raised by <see cref="IRoleManager.RoleConfigurationChanged"/>
/// after any successful mutation. The Part 18 §4.4.1 contract is:
/// "If the configuration of a Role is changed, the Role assignment to
/// active Session shall be re-evaluated and applied." — the session
/// manager subscribes to this event to honour that requirement.
/// </summary>
public sealed class RoleConfigurationChangedEventArgs : EventArgs
{
/// <summary>
/// Initializes the event payload.
/// </summary>
/// <param name="roleId">The role that was changed.</param>
/// <param name="kind">The kind of change that occurred.</param>
public RoleConfigurationChangedEventArgs(NodeId roleId, RoleConfigurationChangeKind kind)
{
RoleId = roleId;
Kind = kind;
}
/// <summary>
/// The role whose configuration changed. For <see cref="RoleConfigurationChangeKind.RoleRemoved"/>
/// this is the NodeId of the removed role; the role is no longer in the manager.
/// </summary>
public NodeId RoleId { get; }
/// <summary>
/// The kind of change that occurred.
/// </summary>
public RoleConfigurationChangeKind Kind { get; }
}
}