ConvertFrom-HexString.ps1
|
<#
.SYNOPSIS Convert from Hex String .DESCRIPTION .EXAMPLE PS C:\>ConvertFrom-HexString "57 68 61 74 20 69 73 20 61 20 68 65 78 20 73 74 72 69 6E 67 3F" Convert string to hex byte string seperated by spaces. .EXAMPLE PS C:\>"415343494920737472696E6720746F2068657820737472696E67" | ConvertFrom-HexString -Delimiter "" -Encoding Ascii Convert ASCII string to hex byte string with no seperation. .INPUTS System.String #> function ConvertFrom-HexString { [CmdletBinding()] param ( # Value to convert [Parameter(Mandatory=$true, Position=0, ValueFromPipeline=$true)] [string[]] $InputObject, # Delimiter between Hex pairs [Parameter (Mandatory=$false)] [string] $Delimiter = ' ', # Output raw byte array [Parameter (Mandatory=$false)] [switch] $RawBytes, # Encoding to use for text strings [Parameter (Mandatory=$false)] [ValidateSet('Ascii', 'UTF32', 'UTF7', 'UTF8', 'BigEndianUnicode', 'Unicode')] [string] $Encoding = 'Default' ) process { $listBytes = New-Object object[] $InputObject.Count for ($iString = 0; $iString -lt $InputObject.Count; $iString++) { [string] $strHex = $InputObject[$iString] if ($strHex.Substring(2,1) -eq $Delimiter) { [string[]] $listHex = $strHex -split $Delimiter } else { [string[]] $listHex = New-Object string[] ($strHex.Length/2) for ($iByte = 0; $iByte -lt $strHex.Length; $iByte += 2) { $listHex[[System.Math]::Truncate($iByte/2)] = $strHex.Substring($iByte, 2) } } [byte[]] $outBytes = New-Object byte[] $listHex.Count for ($iByte = 0; $iByte -lt $listHex.Count; $iByte++) { $outBytes[$iByte] = [byte]::Parse($listHex[$iByte],[System.Globalization.NumberStyles]::HexNumber) } if ($RawBytes) { $listBytes[$iString] = $outBytes } else { $outString = ([Text.Encoding]::$Encoding.GetString($outBytes)) Write-Output $outString } } if ($RawBytes) { return $listBytes } } } |