public/Convert-Base64.ps1
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function Convert-Base64 { <# .SYNOPSIS Convert string to Base64 compressed, or from Base64 compressed to ASCII .DESCRIPTION Convert string to Base64 compressed, or from Base64 compressed to ASCII .PARAMETER String Required. String value to be converted. .PARAMETER Output Required. Options are Base64 or ASCII .EXAMPLE $x = "this is a test string" | Convert-Base64 -Output Base64 returns "H4sIAAAAAAAEACvJyCxWAKJEhZLU4hKF4pKizLx0ALXWhvwVAAAA" $x | Convert-Base64 -Output Base64 Returns "this is a test string" .EXAMPLE "H4sIAAAAAAAEACvJyCxWAKJEhZLU4hKF4pKizLx0ALXWhvwVAAAA" | Convert-Base64 -Output ASCII returns "this is a test string" .LINK https://github.com/Skatterbrainz/helium/blob/master/docs/Convert-Base64.md #> [CmdletBinding()] param ( [parameter(Mandatory=$true,ValueFromPipeline=$true)][ValidateNotNullOrEmpty()]$String, [parameter(Mandatory=$true)][string][ValidateSet('Base64','ASCII')]$Output ) begin {} process { if ($Output -eq 'Base64') { $enc = [system.Text.Encoding]::UTF8 $data = $enc.GetBytes($string) $compressedStream = [System.IO.MemoryStream]::new() $zipStream = [System.IO.Compression.GZipStream]::new($compressedStream, [System.IO.Compression.CompressionMode]::Compress) $zipStream.Write($data, 0, $data.Length); $zipStream.Close(); $compressedData = $compressedStream.ToArray() [Convert]::ToBase64String($compressedData) } else { $data = [System.Convert]::FromBase64String($EncodedText) $compressedStream = [System.IO.MemoryStream]::new($data) $zipStream = [System.IO.Compression.GZipStream]::new($compressedStream, [System.IO.Compression.CompressionMode]::Decompress) $resultStream = [System.IO.MemoryStream]::new() $buffer = [System.Byte[]]::CreateInstance([System.Byte],4096) while (($read = $zipStream.Read($buffer, 0, $buffer.Length)) -gt 0){ $resultStream.Write($buffer, 0, $read) } $decompressed = $resultStream.ToArray() [System.Text.Encoding]::UTF8.GetString($decompressed, 0, $decompressed.Length) } } end {} } |