From b07b41cd435991cd254957af79055080c85b346e Mon Sep 17 00:00:00 2001 From: tanaka takashi Date: Sun, 9 Aug 2026 21:08:20 +0900 Subject: feat: AI Agent Sandbox MCP Server v1を実装 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Specifications、Design、ImplementationPlanの優先順位を整理し、単一Task実行モデル、typed option優先、設定可能なresource上限、local Ollamaを必須とするRelease Gateを文書化。 .NET 10/C# 14の5 production project、3 test project、E2E Clientを構築。typed YAML、en/ja locale、fixed/user prompt、stdioおよびloopback限定Streamable HTTP、agent_run/agent_status、Session、Ollama text/tool/Vision、TaskGraphとtoken accountingを実装。 Windows sandboxとしてfixed AppContainer、canonical/reparse検査、能力別ACL、path+SHA-256 executable approval、child-process restriction、Job Object、task journal、atomic file transaction、crash recoveryを実装。WFPのIPv4/IPv6 default denyとexact allow、dynamic session、temporary loopback exemption、管理者/BFE診断を追加。 Security/Recovery test、MCP/Ollama integration test、stdio/HTTP Operational E2E、Release Bundle生成・checksum・manifest・fresh extraction検査を追加。Requirement TraceabilityとPhase 0〜11の進捗、初回セットアップ可能なREADMEを整備。 Debug/Release/publish/objをrepository rootのbuild/へ集約し、旧project-local bin/objへの依存を除去。artifacts/とbuild/をGit管理外に設定し、clean checkoutでもsolution buildからE2E Clientまで生成可能にした。 --- src/Agent.Windows/Security/TaskAclManager.cs | 76 ++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 src/Agent.Windows/Security/TaskAclManager.cs (limited to 'src/Agent.Windows/Security/TaskAclManager.cs') diff --git a/src/Agent.Windows/Security/TaskAclManager.cs b/src/Agent.Windows/Security/TaskAclManager.cs new file mode 100644 index 0000000..f01e859 --- /dev/null +++ b/src/Agent.Windows/Security/TaskAclManager.cs @@ -0,0 +1,76 @@ +using System.Security.AccessControl; +using System.Security.Principal; +using Agent.Windows.Recovery; + +namespace Agent.Windows.Security; + +public sealed record AclSnapshot(string Path, byte[] SecurityDescriptor, Guid? JournalEntryId = null); + +public sealed class TaskAclManager(SecurityIdentifier appContainerSid, ISecurityAuditSink audit, TaskResourceJournal? journal = null) +{ + public AclSnapshot Grant(Guid taskId, string path, FileCapability capabilities) + { + string canonical = CanonicalPath.Resolve(path); + FileSystemSecurity security = ReadSecurity(canonical); + byte[] original = security.GetSecurityDescriptorBinaryForm(); + Guid? journalEntry = journal?.Prepare("acl", canonical, new Dictionary + { + ["security_descriptor"] = Convert.ToBase64String(original) + }); + FileSystemRights rights = ToRights(capabilities); + if (rights == 0) throw new ArgumentOutOfRangeException(nameof(capabilities)); + bool directory = Directory.Exists(canonical); + var rule = new FileSystemAccessRule(appContainerSid, rights, + directory ? InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit : InheritanceFlags.None, + PropagationFlags.None, AccessControlType.Allow); + security.AddAccessRule(rule); + WriteSecurity(canonical, security); + if (journalEntry is not null) journal!.MarkApplied(journalEntry.Value); + audit.Write(new(DateTimeOffset.UtcNow, taskId, "acl.apply", "applied", new Dictionary { ["path"] = canonical, ["sid"] = appContainerSid.Value, ["rights"] = rights.ToString() })); + return new(canonical, original, journalEntry); + } + + public void Restore(Guid taskId, AclSnapshot snapshot) + { + FileSystemSecurity security = Directory.Exists(snapshot.Path) ? new DirectorySecurity() : new FileSecurity(); + security.SetSecurityDescriptorBinaryForm(snapshot.SecurityDescriptor, AccessControlSections.Access); + WriteSecurity(snapshot.Path, security); + if (snapshot.JournalEntryId is not null) journal!.MarkCleaned(snapshot.JournalEntryId.Value); + audit.Write(new(DateTimeOffset.UtcNow, taskId, "acl.restore", "restored", new Dictionary { ["path"] = snapshot.Path })); + } + + public void NormalizeNewEntry(Guid taskId, string path) + { + string canonical = CanonicalPath.Resolve(path); + FileSystemSecurity security = ReadSecurity(canonical); + security.SetAccessRuleProtection(isProtected: true, preserveInheritance: false); + foreach (FileSystemAccessRule rule in security.GetAccessRules(includeExplicit: true, includeInherited: false, typeof(SecurityIdentifier)) + .OfType() + .Where(rule => rule.IdentityReference == appContainerSid) + .ToArray()) + security.RemoveAccessRuleSpecific(rule); + security.SetAccessRuleProtection(isProtected: false, preserveInheritance: false); + WriteSecurity(canonical, security); + audit.Write(new(DateTimeOffset.UtcNow, taskId, "acl.normalize", "normalized", new Dictionary { ["path"] = canonical })); + } + + private static FileSystemSecurity ReadSecurity(string path) => Directory.Exists(path) + ? FileSystemAclExtensions.GetAccessControl(new DirectoryInfo(path), AccessControlSections.Access) + : FileSystemAclExtensions.GetAccessControl(new FileInfo(path), AccessControlSections.Access); + + private static void WriteSecurity(string path, FileSystemSecurity security) + { + if (security is DirectorySecurity directorySecurity) FileSystemAclExtensions.SetAccessControl(new DirectoryInfo(path), directorySecurity); + else FileSystemAclExtensions.SetAccessControl(new FileInfo(path), (FileSecurity)security); + } + + private static FileSystemRights ToRights(FileCapability capabilities) + { + FileSystemRights rights = 0; + if ((capabilities & FileCapability.Read) != 0) rights |= FileSystemRights.ReadAndExecute | FileSystemRights.ListDirectory; + if ((capabilities & FileCapability.Write) != 0) rights |= FileSystemRights.Write; + if ((capabilities & FileCapability.Execute) != 0) rights |= FileSystemRights.ReadAndExecute; + if ((capabilities & FileCapability.Delete) != 0) rights |= FileSystemRights.Delete | FileSystemRights.DeleteSubdirectoriesAndFiles; + return rights; + } +} -- cgit v1.2.3