149 lines
5.5 KiB
C#
149 lines
5.5 KiB
C#
// (c) Copyright Ascensio System SIA 2010-2022
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//
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// This program is a free software product.
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// You can redistribute it and/or modify it under the terms
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// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
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// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
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// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
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// any third-party rights.
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//
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// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
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// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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//
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// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
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//
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// The interactive user interfaces in modified source and object code versions of the Program must
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// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
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//
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// Pursuant to Section 7(b) of the License you must retain the original Product logo when
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// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
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// trademark law for use of our trademarks.
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//
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
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// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
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// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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namespace ASC.Common.Security.Authorizing;
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[Scope]
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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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public AzManager(IRoleProvider roleProvider, IPermissionProvider permissionProvider)
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: this()
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{
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_roleProvider = roleProvider ?? throw new ArgumentNullException(nameof(roleProvider));
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_permissionProvider = permissionProvider ?? throw new ArgumentNullException(nameof(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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ArgumentNullException.ThrowIfNull(action);
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ArgumentNullException.ThrowIfNull(subject);
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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)
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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)
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{
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break;
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}
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}
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if (exit)
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{
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break;
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}
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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)
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{
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continue;
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}
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foreach (var role in secObjProviderHelper.GetObjectRoles(subject))
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{
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if (!subjects.Contains(role))
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{
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subjects.Add(role);
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}
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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 { get; set; }
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public ISubject DenySubject { get; set; }
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public bool IsAllow { get; set; }
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public static AzManagerAcl Allow => new AzManagerAcl { IsAllow = true };
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public static AzManagerAcl Default => new AzManagerAcl { IsAllow = false };
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}
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#endregion
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}
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