如何从powershell中的一行获取特定值

Question

I'm trying to get a specific value out of the manage-bde -status C: command, which returns the following: BitLocker Drive Encryption: Configuration Tool version 10.0.18362 Copyright (C) 2013 Microsoft Corporation. All rights reserved.

Volume C: [] [OS Volume]

Size:                 237.29 GB
BitLocker Version:    None
Conversion Status:    Fully Decrypted
Percentage Encrypted: 0.0%
Encryption Method:    None
Protection Status:    Protection Off
Lock Status:          Unlocked
Identification Field: None
Key Protectors:       None Found

I'm trying to get the end of the line labelled Protection Status and return Off

Answer 1

根据我的评论，我会改用Get-BitLockerVolume因为它返回一个更容易查询的对象：

Get-BitLockerVolume -MountPoint C: | Select-Object -ExpandProperty ProtectionStatus

Answer 2

If I understand correctly, you would like to check if it matches Off under Protection Status? If so, here is an ugly piece of code I did it fast, but can get you what you want:

$status = manage-bde -status C: | Select-String 'Protection'
if ($status -match 'Off'){
Write-Output $true
} else {
Write-Host $false
}

Answer 3

I used something similar to the post above to determine if BitLocker had been enabled over a drive from the manufacture which will always have unknown or none in the identification field.

# Check for OEM configuration of BitLocker

$blidfield = manage-bde -status C: | Select-String 'Identification Field'
$bloemencrypted = manage-bde -status C: | Select-String 'Conversion Status'
if ($blidfield -match 'None' -or $blidfield -match 'Unknown' -and ($bloemencrypted -match 'Fully Encrypted' -or $bloemencrypted -match 'Used Space Only Encrypted')){
    Write-Log "BitLocker appears to be configured with OEM configuration, Starting to decrypt."
    manage-bde -off C:
    exit
} else {
    Write-Log "BitLocker doesn't appear to be configured with OEM configuration"
}

Please note that the line 'manage-bde -off C:' will decrypt the OS drive.