functions/Sync-SqlLoginPermissions.ps1

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Function Sync-SqlLoginPermissions
{
<#
.SYNOPSIS
Copies SQL login permission from one server to another.
 
.DESCRIPTION
Syncs only SQL Server login permissions, roles, etc. Does not add or drop logins. If a matching login does not exist on the destination, the login will be skipped.
Credential removal not currently supported for Syncs. TODO: Application role sync
 
THIS CODE IS PROVIDED "AS IS", WITH NO WARRANTIES.
 
.PARAMETER Source
Source SQL Server.You must have sysadmin access and server version must be SQL Server version 2000 or greater.
 
.PARAMETER Destination
Destination SQL Server. You must have sysadmin access and server version must be SQL Server version 2000 or greater.
 
.PARAMETER SourceSqlCredential
Allows you to login to servers using SQL Logins as opposed to Windows Auth/Integrated/Trusted. To use:
 
$scred = Get-Credential, then pass $scred object to the -SourceSqlCredential parameter.
 
Windows Authentication will be used if DestinationSqlCredential is not specified. SQL Server does not accept Windows credentials being passed as credentials.
To connect as a different Windows user, run PowerShell as that user.
 
.PARAMETER DestinationSqlCredential
Allows you to login to servers using SQL Logins as opposed to Windows Auth/Integrated/Trusted. To use:
 
$dcred = Get-Credential, then pass this $dcred to the -DestinationSqlCredential parameter.
 
Windows Authentication will be used if DestinationSqlCredential is not specified. SQL Server does not accept Windows credentials being passed as credentials.
To connect as a different Windows user, run PowerShell as that user.
 
.PARAMETER Exclude
Excludes specified logins. This list is auto-populated for tab completion.
 
.PARAMETER Login
Migrates ONLY specified logins. This list is auto-populated for tab completion. Multiple logins allowed.
 
.PARAMETER WhatIf
Shows what would happen if the command were to run. No actions are actually performed.
 
.PARAMETER Confirm
Prompts you for confirmation before executing any changing operations within the command.
 
.NOTES
Tags: Migration
Author: Chrissy LeMaire (@cl), netnerds.net
Requires: sysadmin access on SQL Servers
 
dbatools PowerShell module (https://dbatools.io, clemaire@gmail.com)
Copyright (C) 2016 Chrissy LeMaire
 
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
 
.LINK
https://dbatools.io/Sync-SqlLoginPermissions
 
.EXAMPLE
Sync-SqlLoginPermissions -Source sqlserver2014a -Destination sqlcluster
 
Syncs only SQL Server login permissions, roles, etc. Does not add or drop logins or users. To copy logins and their permissions, use Copy-SqlLogin.
 
.EXAMPLE
Sync-SqlLoginPermissions -Source sqlserver2014a -Destination sqlcluster -Exclude realcajun -SourceSqlCredential $scred -DestinationSqlCredential $dcred
 
Authenticates to SQL Servers using SQL Authentication.
 
Copies all login permissions except for realcajun. If a login already exists on the destination, the permissions will not be migrated.
 
.EXAMPLE
Sync-SqlLoginPermissions -Source sqlserver2014a -Destination sqlcluster -Login realcajun, netnerds
 
Copies permissions ONLY for logins netnerds and realcajun.
 
.NOTES
Tags: Migration
Author: Chrissy LeMaire (@cl), netnerds.net
Requires: sysadmin access on SQL Servers
Limitations: Does not support Application Roles yet
 
.LINK
https://dbatools.io/Sync-SqlLoginPermissions
 
#>


[CmdletBinding(SupportsShouldProcess = $true)]
Param (
[parameter(Mandatory = $true, ValueFromPipeline = $true)]
[object]$Source,
[parameter(Mandatory = $true)]
[object]$Destination,
[object]$SourceSqlCredential,
[object]$DestinationSqlCredential
)

DynamicParam { if ($source) { return Get-ParamSqlLogins -SqlServer $source -SqlCredential $SourceSqlCredential } }

BEGIN
{

Function Update-SqlPermissions
{
[CmdletBinding()]
param (
[Parameter(Mandatory = $true)]
[ValidateNotNullOrEmpty()]
[object]$sourceserver,
[Parameter(Mandatory = $true)]
[ValidateNotNullOrEmpty()]
[object]$sourcelogin,
[Parameter(Mandatory = $true)]
[ValidateNotNullOrEmpty()]
[object]$destserver,
[Parameter(Mandatory = $true)]
[ValidateNotNullOrEmpty()]
[object]$destlogin
)

$destination = $destserver.DomainInstanceName
$source = $sourceserver.DomainInstanceName
$username = $sourcelogin.name

# Server Roles: sysadmin, bulklogin, etc
foreach ($role in $sourceserver.roles)
{
$rolename = $role.name
$destrole = $destserver.roles[$rolename]
if ($destrole -ne $null)
{
try { $destrolemembers = $destrole.EnumMemberNames() }
catch { $destrolemembers = $destrole.EnumServerRoleMembers() }
}
try { $rolemembers = $role.EnumMemberNames() }
catch { $rolemembers = $role.EnumServerRoleMembers() }
if ($rolemembers -contains $username)
{
if ($destrole -ne $null)
{
If ($Pscmdlet.ShouldProcess($destination, "Adding $username to $rolename server role"))
{
try
{
$destrole.AddMember($username)
Write-Output "Added $username to $rolename server role."
}
catch
{
Write-Warning "Failed to add $username to $rolename server role."
Write-Exception $_
}
}
}
}

# Remove for Syncs
if ($rolemembers -notcontains $username -and $destrolemembers -contains $username -and $destrole -ne $null)
{
If ($Pscmdlet.ShouldProcess($destination, "Removing $username from $rolename server role"))
{
try
{
$destrole.DropMember($username)
Write-Output "Removed $username from $rolename server role on $($destserver.name)."
}
catch
{
Write-Warning "Failed to remove $username from $rolename server role on $($destserver.name)."
Write-Exception $_
}
}
}
}

$ownedjobs = $sourceserver.JobServer.Jobs | Where { $_.OwnerLoginName -eq $username }
foreach ($ownedjob in $ownedjobs)
{
if ($destserver.JobServer.Jobs[$ownedjob.name] -ne $null)
{
If ($Pscmdlet.ShouldProcess($destination, "Changing job owner to $username for $($ownedjob.name)"))
{
try
{
Write-Output "Changing job owner to $username for $($ownedjob.name)"
$destownedjob = $destserver.JobServer.Jobs | Where { $_.name -eq $ownedjobs.name }
$destownedjob.set_OwnerLoginName($username)
$destownedjob.Alter()
}
catch
{
Write-Warning "Could not change job owner for $($ownedjob.name)"
Write-Exception $_
}
}
}
}

if ($sourceserver.versionMajor -ge 9 -and $destserver.versionMajor -ge 9)
{
# These operations are only supported by SQL Server 2005 and above.
# Securables: Connect SQL, View any database, Administer Bulk Operations, etc.

$perms = $sourceserver.EnumServerPermissions($username)
foreach ($perm in $perms)
{
$permstate = $perm.permissionstate
if ($permstate -eq "GrantWithGrant") { $grantwithgrant = $true; $permstate = "grant" }
else { $grantwithgrant = $false }
$permset = New-Object Microsoft.SqlServer.Management.Smo.ServerPermissionSet($perm.permissiontype)
If ($Pscmdlet.ShouldProcess($destination, "Performing $permstate on $($perm.permissiontype) for $username"))
{
try
{
$destserver.PSObject.Methods[$permstate].Invoke($permset, $username, $grantwithgrant)
Write-Output "Successfully performed $permstate $($perm.permissiontype) to $username"
}
catch
{
Write-Warning "Failed to $permstate $($perm.permissiontype) to $username"
Write-Exception $_
}
}

# for Syncs
$destperms = $destserver.EnumServerPermissions($username)
foreach ($perm in $destperms)
{
$permstate = $perm.permissionstate
$sourceperm = $perms | Where-Object { $_.PermissionType -eq $perm.Permissiontype -and $_.PermissionState -eq $permstate }
if ($sourceperm -eq $null)
{
If ($Pscmdlet.ShouldProcess($destination, "Performing Revoke on $($perm.permissiontype) for $username"))
{
try
{
$permset = New-Object Microsoft.SqlServer.Management.Smo.ServerPermissionSet($perm.permissiontype)
if ($permstate -eq "GrantWithGrant") { $grantwithgrant = $true; $permstate = "grant" }
else { $grantwithgrant = $false }
$destserver.PSObject.Methods["Revoke"].Invoke($permset, $username, $false, $grantwithgrant)
Write-Output "Successfully revoked $($perm.permissiontype) from $username"
}
catch
{
Write-Warning "Failed to revoke $($perm.permissiontype) from $username"
Write-Exception $_
}
}
}
}
}

# Credential mapping. Credential removal not currently supported for Syncs.
$logincredentials = $sourceserver.credentials | Where-Object { $_.Identity -eq $sourcelogin.name }
foreach ($credential in $logincredentials)
{
if ($destserver.Credentials[$credential.name] -eq $null)
{
If ($Pscmdlet.ShouldProcess($destination, "Adding $($credential.name) to $username"))
{
try
{
$newcred = New-Object Microsoft.SqlServer.Management.Smo.Credential($destserver, $credential.name)
$newcred.identity = $sourcelogin.name
$newcred.Create()
Write-Output "Successfully created credential for $username"
}
catch
{
Write-Warning "Failed to create credential for $username"
Write-Exception $_
}
}
}
}
}

if ($destserver.versionMajor -lt 9) { Write-Warning "Database mappings skipped when destination is SQL Server 2000"; continue }

# For Sync, if info doesn't exist in EnumDatabaseMappings, then no big deal.
foreach ($db in $destlogin.EnumDatabaseMappings())
{
$dbname = $db.dbname
$destdb = $destserver.databases[$dbname]
$sourcedb = $sourceserver.databases[$dbname]
$dbusername = $db.username
$dblogin = $db.loginName

if ($sourcedb -ne $null -and $sourcedb.IsAccessible)
{
if ($sourcedb.users[$dbusername] -eq $null -and $destdb.users[$dbusername] -ne $null)
{
If ($Pscmdlet.ShouldProcess($destination, "Dropping $dbusername from $dbname on destination."))
{
try
{
if ($destdb.schemas.owner -contains $dbusername)
{
Write-Output "$dbusername (login: $dblogin) in $dbname owns a schema. Drop skipped."
}
else
{
$destdb.users[$dbusername].Drop()
Write-Output "Dropped user $dbusername (login: $dblogin) from $dbname on destination."
Write-Exception $_
}
}
catch
{
Write-Warning "Failed to drop $dbusername ($dblogin) from $dbname on destination."
Write-Exception $_
}
}
}

# Remove user from role. Role removal not currently supported for Syncs.
# TODO: reassign if dbo, application roles
foreach ($destrole in $destdb.roles)
{
$destrolename = $destrole.name
$sourcerole = $sourcedb.roles[$destrolename]
if ($sourcerole -ne $null)
{
if ($sourcerole.EnumMembers() -notcontains $dbusername -and $destrole.EnumMembers() -contains $dbusername)
{
if ($dbusername -ne "dbo")
{
If ($Pscmdlet.ShouldProcess($destination, "Dropping $username from $destrolename database role on $dbname"))
{
try
{
$destrole.DropMember($dbusername)
$destdb.Alter()
Write-Output "Dropped username $dbusername (login: $dblogin) from $destrolename on $destination"
}
catch
{
Write-Warning "Failed to remove $dbusername from $destrolename database role on $dbname."
Write-Exception $_
}
}
}
}
}
}

# Remove Connect, Alter Any Assembly, etc
$destperms = $destdb.EnumDatabasePermissions($username)
$perms = $sourcedb.EnumDatabasePermissions($username)
# for Syncs
foreach ($perm in $destperms)
{
$permstate = $perm.permissionstate
$sourceperm = $perms | Where-Object { $_.PermissionType -eq $perm.Permissiontype -and $_.PermissionState -eq $permstate }
if ($sourceperm -eq $null)
{
If ($Pscmdlet.ShouldProcess($destination, "Performing Revoke on $($perm.permissiontype) for $username on $dbname on $destination"))
{
try
{
$permset = New-Object Microsoft.SqlServer.Management.Smo.DatabasePermissionSet($perm.permissiontype)
if ($permstate -eq "GrantWithGrant")
{
$grantwithgrant = $true
$permstate = "grant"
}
else
{
$grantwithgrant = $false
}
$destdb.PSObject.Methods["Revoke"].Invoke($permset, $username, $false, $grantwithgrant)
Write-Output "Successfully revoked $($perm.permissiontype) from $username on $dbname on $destination"
}
catch
{
Write-Warning "Failed to revoke $($perm.permissiontype) from $username on $dbname on $destination"
Write-Exception $_
}
}
}
}
}
}

# Adding database mappings and securables
foreach ($db in $sourcelogin.EnumDatabaseMappings())
{
$dbname = $db.dbname
$destdb = $destserver.databases[$dbname]
$sourcedb = $sourceserver.databases[$dbname]
$dbusername = $db.username; $dblogin = $db.loginName

if ($destdb -ne $null)
{
if (!$destdb.IsAccessible)
{
    Write-Output "Database [$($destdb.Name)] is not accessible. Skipping"
    Continue
}

if ($destdb.users[$dbusername] -eq $null)
{
If ($Pscmdlet.ShouldProcess($destination, "Adding $dbusername to $dbname"))
{
$sql = $sourceserver.databases[$dbname].users[$dbusername].script() | Out-String
$sql = $sql -replace [Regex]::Escape("'$source'"), [Regex]::Escape("'$destination'")
try
{
$destdb.ExecuteNonQuery($sql)
Write-Output "Added user $dbusername (login: $dblogin) to $dbname"
}
catch
{
Write-Warning "Failed to add $dbusername ($dblogin) to $dbname on $destination."
Write-Exception $_
}
}
}

# Db owner
If ($sourcedb.owner -eq $username -and $destdb.owner -ne $username)
{
If ($Pscmdlet.ShouldProcess($destination, "Changing $dbname dbowner to $username"))
{
try
{
$result = Update-SqlDbOwner $sourceserver $destserver -dbname $dbname
Write-Output "Changed $($destdb.name) owner to $($sourcedb.owner)."
}
catch
{
Write-Warning "Failed to update $($destdb.name) owner to $($sourcedb.owner)."
}
}
}

# Database Roles: db_owner, db_datareader, etc
foreach ($role in $sourcedb.roles)
{
if ($role.EnumMembers() -contains $username)
{
$rolename = $role.name
$destdbrole = $destdb.roles[$rolename]
if ($destdbrole -ne $null -and $dbusername -ne "dbo" -and $destdbrole.EnumMembers() -notcontains $username)
{
If ($Pscmdlet.ShouldProcess($destination, "Adding $username to $rolename database role on $dbname"))
{
try
{
$destdbrole.AddMember($username)
$destdb.Alter()
Write-Output "Added $username to $rolename database role on $dbname."

}
catch
{
Write-Warning "Failed to add $username to $rolename database role on $dbname."
Write-Exception $_
}
}
}
}
}

# Connect, Alter Any Assembly, etc
$perms = $sourcedb.EnumDatabasePermissions($username)
foreach ($perm in $perms)
{
$permstate = $perm.permissionstate
if ($permstate -eq "GrantWithGrant")
{
$grantwithgrant = $true
$permstate = "grant"
}
else
{
$grantwithgrant = $false
}

$permset = New-Object Microsoft.SqlServer.Management.Smo.DatabasePermissionSet($perm.permissiontype)
If ($Pscmdlet.ShouldProcess($destination, "Performing $permstate on $($perm.permissiontype) for $username on $dbname"))
{
try
{
$destdb.PSObject.Methods[$permstate].Invoke($permset, $username, $grantwithgrant)
Write-Output "Successfully performed $permstate $($perm.permissiontype) to $username on $dbname"
}
catch
{
Write-Warning "Failed to perform $permstate on $($perm.permissiontype) for $username on $dbname."
Write-Exception $_
}
}
}
}
}
}

Function Sync-Only
{
[CmdletBinding()]
param (
[Parameter(Mandatory = $true)]
[ValidateNotNullOrEmpty()]
[object]$sourceserver,
[object]$destserver,
[array]$Logins,
[array]$Exclude
)

$source = $sourceserver.DomainInstanceName; $destination = $destserver.DomainInstanceName

try
{
$sa = ($destserver.logins | Where-Object { $_.id -eq 1 }).Name
}
catch
{
$sa = "sa"
}

foreach ($sourcelogin in $sourceserver.logins)
{

$username = $sourcelogin.name
$currentlogin = $sourceserver.ConnectionContext.truelogin
if ($Logins -ne $null -and $Logins -notcontains $username) { continue }
if ($exclude -contains $username -or $username.StartsWith("##") -or $username -eq $sa) { continue }

if ($currentlogin -eq $username)
{
Write-Warning "Sync does not modify the permissions of the current user. Skipping."
continue
}

$servername = Resolve-NetBiosName $sourceserver
$userbase = ($username.Split("\")[0]).ToLower()
if ($servername -eq $userbase -or $username.StartsWith("NT ")) { continue }
if (($destlogin = $destserver.Logins.Item($username)) -eq $null) { continue }

Update-SqlPermissions -sourceserver $sourceserver -sourcelogin $sourcelogin -destserver $destserver -destlogin $destlogin
}
}

if ($source -eq $destination) { throw "Source and Destination SQL Servers are the same. Quitting." }

Write-Output "Attempting to connect to SQL Servers.."
$sourceserver = Connect-SqlServer -SqlServer $Source -SqlCredential $SourceSqlCredential
$destserver = Connect-SqlServer -SqlServer $Destination -SqlCredential $DestinationSqlCredential

$source = $sourceserver.DomainInstanceName
$destination = $destserver.DomainInstanceName

if ($sourceserver.versionMajor -lt 8 -or $destserver.versionMajor -lt 8) { throw "SQL Server 7 and below not supported. Quitting." }

# Convert from RuntimeDefinedParameter object to regular array
$Logins = $psboundparameters.Logins
$Exclude = $psboundparameters.Exclude

if ($Logins.length -eq 0)
{
$Logins = $sourceserver.logins.name
}

If ($Pscmdlet.ShouldProcess("console", "Showing sync start message"))
{
Write-Output "Syncing Login Permissions"
}
}


PROCESS
{
if ($pipelinevariable.Length -gt 0)
{
$Source = $pipelinevariable[0].parent.name
$logins = $pipelinevariable.name
}

Sync-Only -sourceserver $sourceserver -destserver $destserver -Logins $Logins -Exclude $Exclude

}

END
{

If ($Pscmdlet.ShouldProcess("console", "Showing final message"))
{
Write-Output "Permission sync complete."
$sourceserver.ConnectionContext.Disconnect()
$destserver.ConnectionContext.Disconnect()
}
}
}