Add Java rehoming; fix cert filtering

Find-Certificate.ps1

@@ -6,17 +6,17 @@
     The value to search for, usually a string.
 
     For a FindType of FindByTimeValid, FindByTimeNotYetValid, or FindByTimeExpired, the FindValue must be a datetime.
-    For a FindType of FindByApplicationPolicy or FindByCertificatePolicy, the FindValue can be a string or a 
-    System.Security.Cryptography.Oid. 
+    For a FindType of FindByApplicationPolicy or FindByCertificatePolicy, the FindValue can be a string or a
+    System.Security.Cryptography.Oid.
     For a FindType of FindByKeyUsage, the FindValue can be a string or an int bitmask.
 
 .Parameter FindType
     The field of the certificate to compare to FindValue.
     e.g. FindBySubjectName, FindByKeyUsage, FindByIssuerDistinguishedName
 
     For a FindType of FindByTimeValid, FindByTimeNotYetValid, or FindByTimeExpired, the FindValue should be a datetime.
-    For a FindType of FindByApplicationPolicy or FindByCertificatePolicy, the FindValue can be a string or a 
-    System.Security.Cryptography.Oid. 
+    For a FindType of FindByApplicationPolicy or FindByCertificatePolicy, the FindValue can be a string or a
+    System.Security.Cryptography.Oid.
     For a FindType of FindByKeyUsage, the FindValue can be a string or an int bitmask.
 
     Omitting a FindType or StoreName will search all stores and common fields.
@@ -72,9 +72,11 @@ $cert =
     if(!($StoreName -and $FindType))
     {
         Write-Verbose "Find '$FindValue'"
+        $now = Get-Date
         ls Cert:\CurrentUser,Cert:\LocalMachine |
             % {ls "Cert:\$($_.Location)\$($_.Name)"} |
-            ? {$_.Subject,$_.Issuer,$_.Thumbprint |? {$_ -like "*$FindValue*"}}
+            ? {$_.Subject,$_.Issuer,$_.Thumbprint |? {$_ -like "*$FindValue*"}} |
+            ? {!$Valid -or ($now -ge $_.NotBefore -and $now -le $_.NotAfter)}
     }
     else
     {

Use-Java.ps1

@@ -0,0 +1,41 @@
+<#
+.Synopsis
+    Switch the Java version for the current process by modifying environment variables.
+
+.Parameter Path
+    The path to the JRE/JDK to use, which must contain bin\java.exe.
+
+.Inputs
+    System.String path to use as the new JAVA_HOME environment variable.
+
+.Example
+    Use-Java.ps1 "$env:ProgramFiles\OpenJDK\jdk-11.0.1"
+#>
+
+[CmdletBinding()] Param(
+[Parameter(Position=0,Mandatory=$true,ValueFromPipelineByPropertyName)]
+[ValidateScript({(Test-Path $_ -PathType Container) -and (Test-Path "$_\bin\java.exe" -PathType Leaf)})]
+[Alias('FullName')][string]$Path
+)
+
+$env:JAVA_HOME = $Path
+Write-Verbose "JAVA_HOME=$env:JAVA_HOME"
+if($env:JDK_HOME)
+{
+    $env:JDK_HOME = $env:JAVA_HOME
+    Write-Verbose "JDK_HOME=$env:JDK_HOME"
+}
+if($env:JRE_HOME -and (Test-Path "$env:JAVA_HOME\jre" -PathType Container))
+{
+    $env:JRE_HOME = "$env:JAVA_HOME\jre"
+    Write-Verbose "JRE_HOME=$env:JRE_HOME"
+}
+if($env:CLASSPATH)
+{
+    $env:CLASSPATH = ".;$env:JAVA_HOME\lib;$env:JAVA_HOME\jre\lib"
+    Write-Verbose "CLASSPATH=$env:CLASSPATH"
+}
+$env:Path = ($env:Path -split ';' |% {if($_ -match 'Java|JDK'){"$Path\bin"}else{$_}}) -join ';'
+Write-Verbose "Path=$($env:Path -replace ';',([Environment]::NewLine))"
+${java.exe} = (Get-Command java.exe -CommandType Application).Path
+Write-Verbose "Using Java ${java.exe} ($((Get-Item ${java.exe}).VersionInfo.ProductVersion))"