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cacls to icacls/powershell

Posted on 2013-01-17
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Last Modified: 2013-01-18
I can restrict access to a file like so with cacls:

echo Y|cacls "C:\Program Files\SomeProgram\SomeFile.exe" /p administrators:F
cacls "C:\Program Files\SomeProgram\SomeFile.exe" /e /g "corp\domain admins":F
cacls "C:\Program Files\SomeProgram\SomeFile.exe" /e /g "corp\dotnetdev":F

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How can I duplicate this result with icacls or powershell?
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Question by:Marketing_Insists
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8 Comments
 
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Expert Comment

by:footech
ID: 38794495
For icacls, syntax is pretty much the same as cacls.
icacls folderORfile /grant:r Administrators:F
icacls folderORfile /grant "corp\Domain Admins":F
icacls folderORfile /grant "corp\dotnetdev":F

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Author Comment

by:Marketing_Insists
ID: 38795025
This is what my original cacls command did:
what old cacls does
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Author Comment

by:Marketing_Insists
ID: 38795030
@Sunburn
I almost have it, but I can't delete the permissions in the middle part of the script,

$file = "C:\Program Files\SomeProgram\SomeFile.exe"

# Below Deletes inheritance, hurray!
$acl = get-acl $file
$isProtected = $true 
$preserveInheritance = $false
$acl.SetAccessRuleProtection($isProtected, $preserveInheritance) 
Set-Acl -Path $file -AclObject $acl 

#can't delete permissions, booo!
$acl = get-acl $file
$account = new-object system.security.principal.ntaccount("*")
$acl.purgeaccessrules($account)
set-acl -aclobject $acl -path $file

# below would be releveant if the above worked
$array = @("administrators","corp\domain admins","corp\dotnetdev")

foreach ($element in $array) {
  $permission = $element,"FullControl","Allow"
  $accessRule = New-Object System.Security.AccessControl.FileSystemAccessRule $permission
  $acl.SetAccessRule($accessRule)
  $acl | Set-Acl $file
}

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Author Comment

by:Marketing_Insists
ID: 38795040
@footech
 That grants permissions, but I can't figure out how to delete the remaining permissions.  the  /remove seems to require explicit user\group specifications, so the below wouldn't work either.
 icacls "C:\Program Files\SomeProgram\SomeFile.exe" /remove:g
 icacls "C:\Program Files\SomeProgram\SomeFile.exe" /remove:g *

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Accepted Solution

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footech earned 2000 total points
ID: 38795116
If they are explicit permissions that have to be removed, then yes you have to specify the user/group/SID.  But if they're inherited permissions then you can use "/inheritance:r" to remove them all.
icacls "C:\Program Files\SomeProgram\SomeFile.exe" /inheritance:r
This switch doesn't have to used on it's own either, you could run everything with one line.
icacls "C:\Program Files\SomeProgram\SomeFile.exe" /inheritance:r /grant Administrators:F /grant "corp\Domain Admins":F /grant "corp\dotnetdev":F

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Author Closing Comment

by:Marketing_Insists
ID: 38795156
Thanks!  this did it
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Expert Comment

by:Subsun
ID: 38795280
With PowerShell you can try something like this..
$file = "C:\Program Files\SomeProgram\SomeFile.exe"
$acl = get-acl $file

$acl.Access | % {
          $acl.purgeaccessrules($_.IdentityReference)
          Set-Acl -AclObject $acl -path $file -ErrorAction SilentlyContinue
}

$array = @("administrators","corp\domain admins","corp\dotnetdev")

foreach ($element in $array) {
  $permission = $element,"FullControl","Allow"
  $accessRule = New-Object System.Security.AccessControl.FileSystemAccessRule $permission
  $acl.SetAccessRule($accessRule)
  $acl | Set-Acl $file
}

$isProtected = $true 
$preserveInheritance = $false
$acl.SetAccessRuleProtection($isProtected, $preserveInheritance) 
Set-Acl -Path $file -AclObject $acl

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