I often need to get a hash with a random salt (usually for passwords) for the projects I work on. This is the PS script I use.

Get-SaltedHash.ps1

function Get-SaltedHash {
    param($text)
    
    $csp = new-object System.Security.Cryptography.RNGCryptoServiceProvider
    $hashAlgorithm = new-object System.Security.Cryptography.SHA256Managed

    $saltBytes = new-object byte[] 8
    $csp.GetNonZeroBytes($saltBytes)

    $textBytes = [System.Text.Encoding]::UTF8.GetBytes($text)
    
    $saltedTextBytes = new-object byte[] ($saltBytes.Length + $textBytes.Length)
    [Array]::Copy($saltBytes, $saltedTextBytes, $saltBytes.Length)
    [Array]::Copy($textBytes, 0, $saltedTextBytes, $saltBytes.Length, $textBytes.Length)

    $hashBytes =  $hashAlgorithm.ComputeHash($saltedTextBytes);

    $saltPlusHashBytes = new-object byte[] ($saltBytes.Length + $hashBytes.Length)
    [Array]::Copy($saltBytes, $saltPlusHashBytes, $saltBytes.Length)
    [Array]::Copy($hashBytes, 0, $saltPlusHashBytes, $saltBytes.Length, $hashBytes.Length)

    $saltedHash = [Convert]::ToBase64String($saltPlusHashBytes)
    
    return $saltedHash
}

Verify-SaltedHash.ps1

function Verify-SaltedHash {
    param($hash, $text)
    
    $hashAlgorithm = new-object System.Security.Cryptography.SHA256Managed

    $saltPlusHashBytes = [Convert]::FromBase64String($hash);
            
    $saltBytes = new-object byte[] 8
    $hashToValidateBytes = new-object byte[] ($saltPlusHashBytes.Length - 8)
    
    [Array]::Copy($saltPlusHashBytes, $saltBytes, 8)
    [Array]::Copy($saltPlusHashBytes, 8, $hashToValidateBytes, 0, $hashToValidateBytes.Length)
    
    $textBytes = [System.Text.Encoding]::UTF8.GetBytes($text);
    
    $saltedTextBytes = new-object byte[] ($saltBytes.Length + $textBytes.Length)
    [Array]::Copy($saltBytes, $saltedTextBytes, $saltBytes.Length)
    [Array]::Copy($textBytes, 0, $saltedTextBytes, $saltBytes.Length, $textBytes.Length)

    $hashBytes = $hashAlgorithm.ComputeHash($saltedTextBytes);

    for ($i = 0; $i -lt $hashBytes.Length; $i++) {
        if ($hashBytes[$i].Equals($hashToValidateBytes[$i]) -ne $true) {
            return $false
        }
    }

    return $true
}