164 lines
6.1 KiB
C#
164 lines
6.1 KiB
C#
/*
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*
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* (c) Copyright Ascensio System Limited 2010-2018
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*
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* This program is freeware. You can redistribute it and/or modify it under the terms of the GNU
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* General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html).
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* In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that
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* Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
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*
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* THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
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*
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* You can contact Ascensio System SIA by email at sales@onlyoffice.com
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*
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* The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display
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* Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
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*
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* Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains
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* relevant author attributions when distributing the software. If the display of the logo in its graphic
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* form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE"
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* in every copy of the program you distribute.
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* Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
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*
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*/
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using System;
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using System.Collections.Generic;
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using ASC.Core.Security.Authorizing;
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namespace ASC.Common.Security.Authorizing
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{
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public class AzManager
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{
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private readonly IPermissionProvider permissionProvider;
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private readonly IRoleProvider roleProvider;
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internal AzManager()
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{
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}
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public AzManager(IRoleProvider roleProvider, IPermissionProvider permissionProvider)
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: this()
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{
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this.roleProvider = roleProvider ?? throw new ArgumentNullException("roleProvider");
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this.permissionProvider = permissionProvider ?? throw new ArgumentNullException("permissionProvider");
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}
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public bool CheckPermission(ISubject subject, IAction action, ISecurityObjectId objectId,
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ISecurityObjectProvider securityObjProvider, out ISubject denySubject,
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out IAction denyAction)
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{
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if (subject == null) throw new ArgumentNullException("subject");
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if (action == null) throw new ArgumentNullException("action");
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var acl = GetAzManagerAcl(subject, action, objectId, securityObjProvider);
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denySubject = acl.DenySubject;
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denyAction = acl.DenyAction;
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return acl.IsAllow;
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}
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internal AzManagerAcl GetAzManagerAcl(ISubject subject, IAction action, ISecurityObjectId objectId, ISecurityObjectProvider securityObjProvider)
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{
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if (action.AdministratorAlwaysAllow && (Constants.Admin.ID == subject.ID || roleProvider.IsSubjectInRole(subject, Constants.Admin)))
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{
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return AzManagerAcl.Allow;
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}
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var acl = AzManagerAcl.Default;
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var exit = false;
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foreach (var s in GetSubjects(subject, objectId, securityObjProvider))
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{
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var aceList = permissionProvider.GetAcl(s, action, objectId, securityObjProvider);
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foreach (var ace in aceList)
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{
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if (ace.Reaction == AceType.Deny && !exit)
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{
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acl.IsAllow = false;
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acl.DenySubject = s;
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acl.DenyAction = action;
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exit = true;
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}
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if (ace.Reaction == AceType.Allow && !exit)
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{
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acl.IsAllow = true;
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if (!action.Conjunction)
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{
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// disjunction: first allow and exit
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exit = true;
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}
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}
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if (exit) break;
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}
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if (exit) break;
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}
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return acl;
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}
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internal IEnumerable<ISubject> GetSubjects(ISubject subject, ISecurityObjectId objectId, ISecurityObjectProvider securityObjProvider)
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{
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var subjects = new List<ISubject>
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{
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subject
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};
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subjects.AddRange(
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roleProvider.GetRoles(subject)
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.ConvertAll(r => { return (ISubject)r; })
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);
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if (objectId != null)
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{
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var secObjProviderHelper = new AzObjectSecurityProviderHelper(objectId, securityObjProvider);
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do
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{
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if (!secObjProviderHelper.ObjectRolesSupported) continue;
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foreach (var role in secObjProviderHelper.GetObjectRoles(subject))
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{
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if (!subjects.Contains(role)) subjects.Add(role);
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}
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} while (secObjProviderHelper.NextInherit());
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}
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return subjects;
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}
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#region Nested type: AzManagerAcl
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internal class AzManagerAcl
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{
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public IAction DenyAction;
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public ISubject DenySubject;
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public bool IsAllow;
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public static AzManagerAcl Allow
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{
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get { return new AzManagerAcl { IsAllow = true }; }
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}
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public static AzManagerAcl Default
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{
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get { return new AzManagerAcl { IsAllow = false }; }
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}
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}
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#endregion
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}
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public static class AzManagerConfigExtension
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{
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public static DIHelper AddAzManagerService(this DIHelper services)
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{
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if (services.TryAddScoped<AzManager>())
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{
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return services
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.AddPermissionProviderService()
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.AddRoleProviderService();
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}
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return services;
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}
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}
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} |