Add Subsystem and SubsystemList Resources

dsc/tests/dsc_sshdconfig.tests.ps1

@@ -177,4 +177,197 @@ resources:
             $out.results.result.afterState.authorizedkeysfile | Should -Be @('./.ssh/authorized_keys', './.ssh/authorized_keys2')
         }
     }
+
+    Context 'Subsystem and SubsystemList Tests' {
+        BeforeAll {
+            # Create a temporary test directory for sshd_config files
+            $TestDir = Join-Path $TestDrive "sshd_test"
+            New-Item -Path $TestDir -ItemType Directory -Force | Out-Null
+            $script:TestConfigPath = Join-Path $TestDir "sshd_config"
+
+            # Define OS-specific paths with spaces
+            if ($IsWindows) {
+                $script:PathWithSpaces = "C:\Program Files\OpenSSH\sftp-server.exe"
+                $script:DefaultSftpPath = "sftp-server.exe"
+                $script:AlternatePath = "C:\OpenSSH\bin\sftp.exe"
+            }
+            else {
+                $script:PathWithSpaces = "/usr/local/lib/openssh server/sftp-server"
+                $script:DefaultSftpPath = "/usr/lib/openssh/sftp-server"
+                $script:AlternatePath = "/usr/libexec/sftp-server"
+            }
+        }
+
+        BeforeEach {
+            # Create test config with existing subsystems
+            $initialContent = @"
+Port 22
+subsystem sftp $script:DefaultSftpPath
+Subsystem test2 /path/to/test2
+PasswordAuthentication yes
+"@
+            Set-Content -Path $script:TestConfigPath -Value $initialContent
+        }
+
+        AfterEach {
+            # Clean up test config file after each test
+            if (Test-Path $script:TestConfigPath) {
+                Remove-Item -Path $script:TestConfigPath -Force -ErrorAction SilentlyContinue
+            }
+            if (Test-Path "$script:TestConfigPath.bak") {
+                Remove-Item -Path "$script:TestConfigPath.bak" -Force -ErrorAction SilentlyContinue
+            }
+        }
+
+        It 'Should add a new subsystem that does not already exist' -Skip:($script:skipSubsystemTests) {
+            $config_yaml = @"
+`$schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
+metadata:
+  Microsoft.DSC:
+    securityContext: elevated
+resources:
+- name: newsub
+  type: Microsoft.OpenSSH.SSHD/Subsystem
+  metadata:
+    filepath: $($script:TestConfigPath -replace '\\', '/')
+  properties:
+    _exist: true
+    subsystem:
+      name: newsubsystem
+      value: /path/to/newsubsystem
+"@
+            $out = dsc config set -i "$config_yaml" | ConvertFrom-Json -Depth 10
+            $LASTEXITCODE | Should -Be 0
+            $out.hadErrors | Should -BeFalse
+            $out.results.Count | Should -Be 1
+            $out.results[0].type | Should -BeExactly 'Microsoft.OpenSSH.SSHD/Subsystem'
+            $out.results[0].result.afterState._exist | Should -Be $true
+            $out.results[0].result.afterState.subsystem.name | Should -Be 'newsubsystem'
+
+            # Verify file contains the new subsystem
+            $subsystems = Get-Content $script:TestConfigPath | Where-Object { $_ -match '^\s*subsystem\s+' }
+            $subsystems.Count | Should -Be 3
+            $subsystems | Should -Contain "subsystem newsubsystem /path/to/newsubsystem"
+        }
+
+        It 'Should remove a subsystem when _exist is false' -Skip:($script:skipSubsystemTests) {
+            $config_yaml = @"
+`$schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
+metadata:
+  Microsoft.DSC:
+    securityContext: elevated
+resources:
+- name: removesub
+  type: Microsoft.OpenSSH.SSHD/Subsystem
+  metadata:
+    filepath: $($script:TestConfigPath -replace '\\', '/')
+  properties:
+    _exist: false
+    subsystem:
+      name: sftp
+"@
+            $out = dsc config set -i "$config_yaml" | ConvertFrom-Json -Depth 10
+            $LASTEXITCODE | Should -Be 0
+            $out.hadErrors | Should -BeFalse
+            $out.results[0].result.afterState._exist | Should -Be $false
+
+            # Verify subsystem was removed
+            $subsystems = Get-Content $script:TestConfigPath | Where-Object { $_ -match '^\s*subsystem\s+' }
+            $subsystems.Count | Should -Be 1
+            $subsystems | Should -Not -Match 'sftp'
+        }
+
+        It 'Should add multiple new subsystems with SubsystemList' -Skip:($script:skipSubsystemTests) {
+            $config_yaml = @"
+`$schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
+metadata:
+  Microsoft.DSC:
+    securityContext: elevated
+resources:
+- name: multisubsystem
+  type: Microsoft.OpenSSH.SSHD/SubsystemList
+  metadata:
+    filepath: $($script:TestConfigPath -replace '\\', '/')
+  properties:
+    _purge: false
+    subsystem:
+    - name: newsub1
+      value: /path/to/newsub1
+    - name: newsub2
+      value: /path/to/newsub2
+"@
+            $out = dsc config set -i "$config_yaml" | ConvertFrom-Json -Depth 10
+            $LASTEXITCODE | Should -Be 0
+            $out.hadErrors | Should -BeFalse
+            $out.results[0].type | Should -BeExactly 'Microsoft.OpenSSH.SSHD/SubsystemList'
+            $out.results[0].result.afterState.subsystem.Count | Should -Be 2
+
+            # Verify all subsystems are present (old + new)
+            $subsystems = Get-Content $script:TestConfigPath | Where-Object { $_ -match '^\s*subsystem\s+' }
+            $subsystems.Count | Should -Be 4
+            $subsystems | Should -Contain "subsystem newsub1 /path/to/newsub1"
+            $subsystems | Should -Contain "subsystem newsub2 /path/to/newsub2"
+        }
+
+        It 'Should preserve unlisted subsystems when _purge is false' {
+            $config_yaml = @"
+`$schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
+metadata:
+  Microsoft.DSC:
+    securityContext: elevated
+resources:
+- name: preservesubsystem
+  type: Microsoft.OpenSSH.SSHD/SubsystemList
+  metadata:
+    filepath: $($script:TestConfigPath -replace '\\', '/')
+  properties:
+    _purge: false
+    subsystem:
+    - name: onlythisone
+      value: /path/to/this
+"@
+            $out = dsc config set -i "$config_yaml" | ConvertFrom-Json -Depth 10
+            $LASTEXITCODE | Should -Be 0
+            $out.hadErrors | Should -BeFalse
+
+            # Verify all existing subsystems are still present plus the new one
+            $subsystems = Get-Content $script:TestConfigPath | Where-Object { $_ -match '^\s*subsystem\s+' }
+            $subsystems.Count | Should -Be 3
+            $subsystems | Should -Contain "subsystem onlythisone /path/to/this"
+            $subsystems | Should -Contain "subsystem sftp $script:DefaultSftpPath"
+            $subsystems | Should -Contain "Subsystem test2 /path/to/test2"
+        }
+
+        It 'Should remove unlisted subsystems when _purge is true' {
+            $config_yaml = @"
+`$schema: https://aka.ms/dsc/schemas/v3/bundled/config/document.json
+metadata:
+  Microsoft.DSC:
+    securityContext: elevated
+resources:
+- name: purgesubsystem
+  type: Microsoft.OpenSSH.SSHD/SubsystemList
+  metadata:
+    filepath: $($script:TestConfigPath -replace '\\', '/')
+  properties:
+    _purge: true
+    subsystem:
+    - name: sftp
+      value: $($script:AlternatePath -replace '\\', '/')
+    - name: newsub
+      value: /path/to/newsub
+"@
+            $out = dsc config set -i "$config_yaml" | ConvertFrom-Json -Depth 10
+            $LASTEXITCODE | Should -Be 0
+            $out.hadErrors | Should -BeFalse
+
+            # Verify only specified subsystems remain
+            $subsystems = Get-Content $script:TestConfigPath | Where-Object { $_ -match '^\s*subsystem\s+' }
+            $subsystems.Count | Should -Be 2
+            $sftpLine = $subsystems | Where-Object { $_ -match 'sftp' }
+            $sftpLine | Should -Match ([regex]::Escape($script:AlternatePath))
+            $subsystems | Should -Contain "subsystem newsub /path/to/newsub"
+            $subsystems | Should -Not -Match 'test2'
+        }
+    }
 }

resources/sshdconfig/.project.data.json

@@ -7,7 +7,9 @@
     ],
     "CopyFiles": {
         "All": [
-            "sshd_config.dsc.resource.json"
+            "sshd_config.dsc.resource.json",
+            "sshd-subsystem.dsc.resource.json",
+            "sshd-subsystemList.dsc.resource.json"
         ],
         "Windows": [
             "sshd-windows.dsc.resource.json"

resources/sshdconfig/locales/en-us.toml

@@ -33,6 +33,7 @@ defaultShellEscapeArgsMustBe0Or1 = "'%{input}' must be a 0 or 1"
 defaultShellEscapeArgsMustBeDWord = "escapeArguments must be a DWord"
 defaultShellMustBeString = "shell must be a string"
 includeWarning = "Include directive found in sshd_config. This resource uses 'sshd -T' to process the overall configuration state, which merges all included files but does not return the Include directive itself"
+invalidSetting = "Invalid setting: %{setting}"
 traceInput = "Get input:"
 windowsOnly = "Microsoft.OpenSSH.SSHD/Windows is only applicable to Windows"
 
@@ -57,6 +58,8 @@ missingKeyInCriteria = "missing key in criteria node: '%{input}'"
 missingValueInCriteria = "missing value in criteria node: '%{input}'"
 missingValueInChildNode = "missing value in child node: '%{input}'"
 noArgumentsFound = "no arguments found in node: '%{input}'"
+structuredKeywordCannotUseOperator = "structured keyword '%{keyword}' cannot use operator syntax"
+structuredKeywordRequiresMinArgs = "structured keyword '%{keyword}' requires at least a name and a value"
 valueDebug = "Parsed argument value:"
 unknownNode = "unknown node: '%{kind}'"
 unknownNodeType = "unknown node type: '%{node}'"
@@ -67,9 +70,15 @@ backupCreated = "Backup created at: %{path}"
 cleanupFailed = "Failed to clean up temporary file %{path}: %{error}"
 configDoesNotExist = "sshd_config file does not exist, no backup created"
 defaultShellDebug = "default_shell: %{shell}"
+entryNameRequired = "Entry 'name' field is required and cannot be empty"
+entryValueRequired = "Entry '%{name}' requires a 'value' field"
+expectedArrayForKeyword = "Expected array for keyword '%{keyword}'"
+failedToParse = "failed to parse: '%{input}'"
 failedToParseDefaultShell = "failed to parse input for DefaultShell with error: '%{error}'"
+multipleKeywordsNotAllowed = "Multiple keywords not allowed in input (found %{count} keywords)"
+nameValueEntryRequiresValue = "Name-value keyword entry requires 'value' field when _exist is true"
+noKeywordFoundInInput = "No keyword found in input (expected one keyword like 'subsystem')"
 purgeFalseRequiresExistingFile = "_purge=false requires an existing sshd_config file. Use _purge=true to create a new configuration file."
-purgeFalseUnsupported = "_purge=false is not supported for keywords that can have multiple values"
 settingDefaultShell = "Setting default shell"
 settingSshdConfig = "Setting sshd_config"
 shellPathDoesNotExist = "shell path does not exist: '%{shell}'"

resources/sshdconfig/src/args.rs

@@ -73,5 +73,7 @@ pub struct DefaultShell {
 #[derive(Clone, Debug, Eq, PartialEq, ValueEnum)]
 pub enum Setting {
     SshdConfig,
-    WindowsGlobal
-}
+    SshdConfigRepeat,
+    SshdConfigRepeatList,
+    WindowsGlobal,
+}