Reapply "Install and use Microsoft provide OpenSSH"

This reverts commit 65151ca.

Author: aramprice

lib/packer/config/templates/provision_windows2019.json.erb

@@ -147,7 +147,7 @@
     "inline": [
       "$ErrorActionPreference = \"Stop\";",
       "trap { $host.SetShouldExit(1) }",
-      "Install-SSHD -SSHZipFile 'C:\\provision\\OpenSSH-Win64.zip'"
+      "Install-SSHD"
     ]
   },
   {

modules/BOSH.SSH/BOSH.SSH.psd1

@@ -6,9 +6,8 @@
     Copyright = '(c) 2017 BOSH'
     Description = 'Install Microsoft SSHD'
     PowerShellVersion = '4.0'
-    FunctionsToExport = @('Install-SSHD',
-    'Enable-SSHD',
-    'Remove-SSHKeys')
+    RequiredModules = @('BOSH.Utils')
+    FunctionsToExport = @('Install-SSHD', 'Enable-SSHD', 'Remove-SSHKeys')
     CmdletsToExport = @()
     VariablesToExport = '*'
     AliasesToExport = @()

modules/BOSH.Utils/BOSH.Utils.Tests.ps1

@@ -1,6 +1,8 @@
 BeforeAll {
     Import-Module ./BOSH.Utils.psm1
 
+    $osVersion = "windows2019"
+
     # As of now, this function only supports DWords and Strings.
     function Restore-RegistryState
     {
@@ -328,7 +330,7 @@ Describe "BOSH.Utils" {
             $actualOSVersion = $null
 
             { Get-OSVersion | Set-Variable -Name "actualOSVersion" -Scope 1 } | Should -Not -Throw
-            $actualOsVersion | Should -eq "windows2019"
+            $actualOsVersion | Should -eq $osVersion
 
             Assert-MockCalled Write-Log -Times 1 -Scope It -ParameterFilter { $Message -eq "Found OS version: Windows 2019" } -ModuleName BOSH.Utils
             Assert-MockCalled Get-OSVersionString -Times 1 -Scope It -ModuleName BOSH.Utils

stembuild/README.md

@@ -240,7 +240,6 @@ You will need to construct `assets/StemcellAutomation.zip`. This file represents
 **assets/StemcellAutomation.zip files:**
 | File | Source / Description |
 |-|-|
-| OpenSSH-Win64.zip     | https://github.com/PowerShell/Win32-OpenSSH/releases |
 | bosh-psmodules.zip    | https://github.com/cloudfoundry/bosh-psmodules/tree/master/modules |
 | agent.zip             | A zip constructed using various BOSH executables. See list of necessary files below. |
 | deps.json             | A JSON file with the SHA256 checksums and optionally the version for each component in this zip. See format below. |
@@ -262,9 +261,6 @@ You will need to construct `assets/StemcellAutomation.zip`. This file represents
 **deps.json format:**
 ```json
 {
-  "OpenSSH-Win64.zip": {
-    "sha": "SOME-SHA256"
-  },
   "bosh-psmodules.zip": {
     "sha": "SOME-SHA256"
   },
@@ -280,7 +276,6 @@ You will need to construct `assets/StemcellAutomation.zip`. This file represents
 
 Once you have these files, run:
 ```bash
-OPENSSH_ZIP="OpenSSH-Win64.zip" \
 BOSH_PSMODULES_ZIP="bosh-psmodules.zip" \
 AGENT_ZIP="agent.zip" \
 DEPS_JSON="deps.json" \