mirror of
https://github.com/Yamato-Security/WELA.git
synced 2026-10-02 04:24:44 +02:00
田中ザック Isaac Mathis
9d03a19082
* Add explicit native SMB runtime audit activation * Select explicit PowerShell workflow shells and link PR changelog * Clear expected refusal child exit codes after assertions * Retain native SMB command provenance in capability diagnostics * Bind SMB command guards to observed native CDXML module identities
194 lines
14 KiB
PowerShell
194 lines
14 KiB
PowerShell
# Explicit native audit-switch activation. No registry policy, security, share or service writes.
|
|
function Get-WelaSmbRuntimeKey { param($Value) ConvertTo-Json -InputObject $Value -Depth 24 -Compress }
|
|
|
|
function Get-WelaSmbRuntimeSources {
|
|
$result=[ordered]@{}
|
|
foreach($name in @('WELA.ps1','scripts/SmbRuntimeActivation.ps1','scripts/SmbAuditing.ps1','scripts/Configuration.ps1','scripts/WefArrival.ps1')) {
|
|
$result[$name]=(Get-FileHash -LiteralPath (Join-Path $script:ScriptRoot $name) -Algorithm SHA256 -ErrorAction Stop).Hash
|
|
}
|
|
[pscustomobject]$result
|
|
}
|
|
|
|
function Assert-WelaSmbRuntimeCommand {
|
|
param($Command,[ValidateSet('Server','Client')][string]$Side,[ValidateSet('Get','Set')][string]$Verb,[string]$ModuleBase)
|
|
# SmbShare exports functions from these native nested CDXML modules.
|
|
if($Command.Name -cne "$Verb-Smb${Side}Configuration" -or $Command.ModuleName -cne "Smb${Side}Configuration" -or
|
|
[string]$Command.CommandType -cne 'Function' -or [IO.Path]::GetFullPath($Command.Module.ModuleBase) -ine $ModuleBase){
|
|
$observed=[pscustomobject]@{Name=$Command.Name;ModuleName=$Command.ModuleName;ModuleBase=$Command.Module.ModuleBase;Type=[string]$Command.CommandType}
|
|
throw "SMB commands must resolve to the reviewed native SmbShare CDXML module. Expected $ModuleBase; observed $(Get-WelaSmbRuntimeKey $observed)"
|
|
}
|
|
if($Verb -eq 'Set') {
|
|
$component=if($Side -eq 'Server'){'LanmanServer'}else{'LanmanWorkstation'}
|
|
foreach($definition in @(Get-WelaSmbAuditDefinitions | Where-Object Component -eq $component)) {
|
|
if(-not $Command.Parameters.ContainsKey($definition.Name) -or $Command.Parameters[$definition.Name].ParameterType -ne [bool]) {
|
|
throw "Native setter lacks the exact Boolean parameter $($definition.Name)."
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
function Get-WelaSmbRuntimeCommands {
|
|
$base=[IO.Path]::GetFullPath((Join-Path ([Environment]::SystemDirectory) 'WindowsPowerShell/v1.0/Modules/SmbShare'))
|
|
$commands=[ordered]@{}
|
|
foreach($side in @('Server','Client')) {
|
|
foreach($verb in @('Get','Set')) {
|
|
$name="SmbShare\$verb-Smb${side}Configuration"
|
|
$found=@(Get-Command -Name $name -ErrorAction Stop)
|
|
if($found.Count -ne 1){throw 'Expected exactly one native module-qualified SMB command.'}
|
|
Assert-WelaSmbRuntimeCommand -Command $found[0] -Side $side -Verb $verb -ModuleBase $base
|
|
$commands[$name]=[pscustomobject]@{ModuleName=$found[0].ModuleName;ModuleBase=$base;ModuleVersion=$found[0].Module.Version.ToString();CommandType=$found[0].CommandType.ToString()}
|
|
}
|
|
}
|
|
$files=@(Get-ChildItem -LiteralPath $base -File -Recurse -ErrorAction Stop | Where-Object Extension -in @('.psd1','.psm1','.cdxml','.dll','.ps1xml') | Sort-Object FullName)
|
|
if($files.Count -lt 1 -or $files.Count -gt 100){throw 'Unexpected native SMB module inventory.'}
|
|
$hashes=[ordered]@{}
|
|
foreach($file in $files){
|
|
if($file.Length -gt 16MB -or ($file.Attributes -band [IO.FileAttributes]::ReparsePoint)){throw 'Unsupported SMB module source.'}
|
|
$hashes[$file.FullName]=(Get-FileHash -LiteralPath $file.FullName -Algorithm SHA256 -ErrorAction Stop).Hash
|
|
}
|
|
[pscustomobject]@{Commands=[pscustomobject]$commands;Files=[pscustomobject]$hashes}
|
|
}
|
|
|
|
function ConvertTo-WelaSmbRuntimeConfiguration {
|
|
param($Configuration,[ValidateSet('Server','Client')][string]$Side)
|
|
if($Configuration.CimClass.CimClassName -cne "MSFT_Smb${Side}Configuration"){throw 'Expected one actual native SMB configuration CIM instance.'}
|
|
$properties=@($Configuration.CimInstanceProperties | Sort-Object Name)
|
|
if($properties.Count -lt 3 -or $properties.Count -gt 160){throw 'Unexpected SMB configuration property count.'}
|
|
$result=[ordered]@{}
|
|
foreach($property in $properties) {
|
|
if($result.Contains($property.Name)){throw 'Duplicate SMB configuration property.'}
|
|
$value=$property.Value
|
|
foreach($item in @($value)) {
|
|
if($null -ne $item -and $item -isnot [bool] -and $item -isnot [string] -and
|
|
$item -isnot [byte] -and $item -isnot [uint16] -and $item -isnot [uint32] -and $item -isnot [uint64] -and
|
|
$item -isnot [int16] -and $item -isnot [int32] -and $item -isnot [int64]){throw "Unsupported native configuration value: $($property.Name)"}
|
|
if($item -is [string] -and $item.Length -gt 8192){throw 'Native configuration string exceeds bound.'}
|
|
}
|
|
if(@($value).Count -gt 128){throw 'Native configuration array exceeds bound.'}
|
|
$result[$property.Name]=[pscustomobject]@{CimType=$property.CimType.ToString();Value=$value}
|
|
}
|
|
$component=if($Side -eq 'Server'){'LanmanServer'}else{'LanmanWorkstation'}
|
|
foreach($definition in @(Get-WelaSmbAuditDefinitions | Where-Object Component -eq $component)) {
|
|
if(-not $result.Contains($definition.Name) -or $result[$definition.Name].Value -isnot [bool] -or $result[$definition.Name].CimType -cne 'Boolean') {
|
|
throw "Native getter lacks the exact Boolean property $($definition.Name)."
|
|
}
|
|
}
|
|
[pscustomobject]$result
|
|
}
|
|
|
|
function Get-WelaSmbRuntimeState {
|
|
$hostState=Get-WelaSmbAuditHost
|
|
if($hostState.Status -ne 'Candidate'){throw "SMB runtime activation is $($hostState.Status): $($hostState.Diagnostic)"}
|
|
$commands=Get-WelaSmbRuntimeCommands
|
|
$policies=[ordered]@{}
|
|
foreach($definition in Get-WelaSmbAuditDefinitions) {
|
|
$capability=Get-WelaSmbAuditCapability -Definition $definition -HostState $hostState
|
|
if($capability.Status -ne 'Supported'){throw "Unverified $($definition.Component)/$($definition.Name): $($capability.Diagnostic)"}
|
|
$policies["$($definition.Component)/$($definition.Name)"]=[pscustomobject]@{
|
|
Path=$definition.Path;Name=$definition.Name;AdmxSha256=$capability.AdmxSha256
|
|
Policy=Get-WelaRegistryState -Path $definition.Path -Name $definition.Name
|
|
}
|
|
}
|
|
$configurations=[ordered]@{}
|
|
foreach($side in @('Server','Client')) {
|
|
$command="SmbShare\Get-Smb${side}Configuration"
|
|
$native=@(& $command -ErrorAction Stop)
|
|
if($native.Count -ne 1){throw 'Expected exactly one native SMB configuration.'}
|
|
$configurations[$side]=ConvertTo-WelaSmbRuntimeConfiguration -Configuration $native[0] -Side $side
|
|
}
|
|
[pscustomobject][ordered]@{Computer=[Environment]::MachineName;Host=$hostState;Commands=$commands;Sources=Get-WelaSmbRuntimeSources;Policies=[pscustomobject]$policies;Configurations=[pscustomobject]$configurations}
|
|
}
|
|
|
|
function Get-WelaSmbRuntimePlan {
|
|
param($State)
|
|
foreach($definition in Get-WelaSmbAuditDefinitions) {
|
|
$id="$($definition.Component)/$($definition.Name)"
|
|
$policy=$State.Policies.$id.Policy
|
|
$side=if($definition.Component -eq 'LanmanServer'){'Server'}else{'Client'}
|
|
$value=$State.Configurations.$side.($definition.Name).Value
|
|
$compatible=($policy.ValueExists -is [bool] -and -not $policy.ValueExists) -or
|
|
($policy.ValueExists -eq $true -and $policy.Type -ceq 'DWord' -and
|
|
($policy.Value -is [int] -or $policy.Value -is [long] -or $policy.Value -is [uint32]) -and $policy.Value -eq 1)
|
|
[pscustomobject][ordered]@{Id=$id;Side=$side;Name=$definition.Name;Before=$value;Desired=$true;Policy=$policy
|
|
Status=$(if(-not $compatible){'BlockedPolicy'}elseif($value){'AlreadyActive'}else{'ActivationRequired'})
|
|
Diagnostic=$(if(-not $compatible){'Existing policy is not absent or DWORD 1; review its authority. It will not be overwritten.'}elseif($policy.ValueExists){'Policy DWORD 1 and runtime Boolean are separate observations.'}else{'Policy value is absent; explicit activation changes native local configuration only.'})}
|
|
}
|
|
}
|
|
|
|
function Set-WelaSmbRuntimeFlag {
|
|
param([string]$Id)
|
|
$matches=@(Get-WelaSmbAuditDefinitions | Where-Object {"$($_.Component)/$($_.Name)" -ceq $Id})
|
|
if($matches.Count -ne 1){throw 'Unknown SMB audit switch.'}
|
|
$definition=$matches[0]
|
|
$side=if($definition.Component -eq 'LanmanServer'){'Server'}else{'Client'}
|
|
$command="SmbShare\Set-Smb${side}Configuration"
|
|
$parameters=@{Confirm=$false;Force=$true;ErrorAction='Stop'}
|
|
$parameters[$definition.Name]=$true
|
|
$null=& $command @parameters
|
|
}
|
|
|
|
function Write-WelaSmbRuntimeReceipt {
|
|
param([string]$Root,[string]$Name,$Value)
|
|
if($Name -notmatch '^(plan|result|[1-6]-(pending|confirmed))\.json$'){throw 'Unexpected receipt filename.'}
|
|
$null=Resolve-WelaArrivalPath $Root
|
|
$path=Join-Path $Root $Name
|
|
$bytes=[Text.UTF8Encoding]::new($false).GetBytes((Get-WelaSmbRuntimeKey $Value))
|
|
if($bytes.Length -gt 4MB){throw 'SMB activation receipt exceeds bound.'}
|
|
$stream=[IO.File]::Open($path,[IO.FileMode]::CreateNew,[IO.FileAccess]::Write,[IO.FileShare]::None)
|
|
try {$stream.Write($bytes,0,$bytes.Length);$stream.Flush($true)}finally{$stream.Dispose()}
|
|
$expected=Get-WelaArrivalHash $bytes
|
|
if((Get-FileHash -LiteralPath $path -Algorithm SHA256 -ErrorAction Stop).Hash.ToLowerInvariant() -cne $expected){throw 'SMB receipt readback differs.'}
|
|
[pscustomobject]@{Name=$Name;Bytes=$bytes.Length;Sha256=$expected}
|
|
}
|
|
|
|
function Invoke-WelaSmbRuntimeActivation {
|
|
param([ValidateSet('Plan','Activate')][string]$Action='Plan',[string]$OutputPath,[switch]$Auto,[switch]$DryRun)
|
|
if($DryRun -and $Action -ne 'Activate'){throw 'DryRun requires SmbRuntimeAction Activate.'}
|
|
if($Action -eq 'Plan' -and ($Auto -or $OutputPath)){throw 'Plan reads only; Auto and OutputPath apply to Activate.'}
|
|
$report=[pscustomobject][ordered]@{SchemaVersion=1;Kind='WelaSmbRuntimeActivation';Action=$Action;DryRun=[bool]$DryRun;RecordedUtc=[DateTime]::UtcNow.ToString('o')
|
|
Status='Unverified';ExitCode=1;Before=$null;After=$null;Controls=@();Results=@();Artifacts=@();OutputPath=$null;Diagnostic=''
|
|
VerificationScope='Native local audit switches at the recorded observations; policy authority and persistence are unknown';ReadyRuleCredit=0;EventGeneration='Not tested';Forwarding='Not tested'}
|
|
try {
|
|
$state=Get-WelaSmbRuntimeState;$report.Before=$state
|
|
$report.Controls=@(Get-WelaSmbRuntimePlan $state)
|
|
if(@($report.Controls | Where-Object Status -eq BlockedPolicy).Count){throw 'One or more policy values conflict or are malformed. No audit flags were changed.'}
|
|
if($Action -eq 'Plan' -or $DryRun){$report.Status=if($DryRun){'DryRun'}else{'Planned'};$report.ExitCode=0;return $report}
|
|
if(-not $OutputPath){throw 'Activate requires a new SmbRuntimeOutputPath on a local fixed drive.'}
|
|
$output=New-WelaArrivalOutput -Path $OutputPath -SourcePath $script:ScriptRoot;$report.OutputPath=$output
|
|
$report.Artifacts+=Write-WelaSmbRuntimeReceipt $output 'plan.json' ([pscustomobject]@{State=$state;Controls=$report.Controls})
|
|
$expectedKey=Get-WelaSmbRuntimeKey $state
|
|
$index=0;$stopped=$false
|
|
foreach($control in $report.Controls) {
|
|
$index++
|
|
$row=[pscustomobject][ordered]@{Id=$control.Id;Before=$control.Before;After=$null;Status='Skipped';Diagnostic='';PendingReceipt=$null;ConfirmedReceipt=$null}
|
|
$report.Results+= $row
|
|
if($stopped){$row.Diagnostic='A prior activation failed; no further changes were attempted.';continue}
|
|
try {
|
|
$fresh=Get-WelaSmbRuntimeState
|
|
if((Get-WelaSmbRuntimeKey $fresh) -cne $expectedKey){throw 'Host, source, policy or native configuration drifted after the snapshot.'}
|
|
if($control.Before){$row.After=$true;$row.Status='AlreadyActive';continue}
|
|
if(-not $Auto -and (Read-Host "Activate only SMB audit flag $($control.Id)? (y/N)") -cnotin @('y','Y')){$row.Diagnostic='Declined by operator.';continue}
|
|
$row.PendingReceipt=Write-WelaSmbRuntimeReceipt $output "$index-pending.json" ([pscustomobject]@{Kind='Pending';Id=$control.Id;Before=$fresh;Desired=$true;RecordedUtc=[DateTime]::UtcNow.ToString('o')})
|
|
# Re-read after interaction and durable intent, immediately before the setter.
|
|
if((Get-WelaSmbRuntimeKey (Get-WelaSmbRuntimeState)) -cne $expectedKey){throw 'Context drifted before the native setter; activation refused.'}
|
|
Set-WelaSmbRuntimeFlag -Id $control.Id
|
|
$after=Get-WelaSmbRuntimeState;$row.After=$after.Configurations.($control.Side).($control.Name).Value
|
|
# The only permitted delta is this one Boolean. All policies and every
|
|
# other native configuration property (including security) must match.
|
|
$next=Get-WelaSmbRuntimeKey $fresh | ConvertFrom-Json
|
|
$next.Configurations.($control.Side).($control.Name).Value=$true
|
|
if((Get-WelaSmbRuntimeKey $after) -cne (Get-WelaSmbRuntimeKey $next)){throw 'Native readback did not show exactly the requested audit-only delta.'}
|
|
$row.ConfirmedReceipt=Write-WelaSmbRuntimeReceipt $output "$index-confirmed.json" ([pscustomobject]@{Kind='Confirmed';Id=$control.Id;Pending=$row.PendingReceipt;After=$after;RecordedUtc=[DateTime]::UtcNow.ToString('o')})
|
|
$state=$after;$expectedKey=Get-WelaSmbRuntimeKey $state
|
|
$row.Status='Activated';$row.Diagnostic='Native Boolean True observed; policy tuple and all other configuration properties preserved.'
|
|
}catch{$row.Status='Failed';$row.Diagnostic=$_.Exception.Message;$stopped=$true}
|
|
}
|
|
$report.After=Get-WelaSmbRuntimeState
|
|
if((Get-WelaSmbRuntimeKey $report.After) -cne $expectedKey){throw 'Final context differs from the last verified configuration. Review partial receipts; no automatic rollback is attempted.'}
|
|
if(@($report.Results | Where-Object Status -notin @('Activated','AlreadyActive')).Count){throw 'Some flags were not activated. Inspect per-control results and receipts.'}
|
|
$report.Status='RuntimeAuditingActive';$report.ExitCode=0
|
|
}catch{$report.Diagnostic=$_.Exception.Message}
|
|
if($report.OutputPath){$null=Write-WelaSmbRuntimeReceipt $report.OutputPath 'result.json' $report}
|
|
$report
|
|
}
|