Hex Conversions (from/to Hex)

Hex_Conversions.ps1

# Convert to/from Hex


### From Byte array to Hex String
$bytes = [byte[]](10,20,30,40)


# a) via .ToString() method
$bytes.ForEach({$_.ToString('x2')}) -join ''

# b) via the string format operator
$bytes.ForEach({'{0:x2}' -f $_}) -join ''

# c) via BitConverter class
[System.BitConverter]::ToString($bytes).Replace('-',$null)

# d) via the Convert class
[System.Convert]::ToHexString($bytes)
# NOTE: this is not available on PS v5
#       this is only available on PS v7+

# e) via Format-Hex
(Format-Hex -InputObject $bytes).HexBytes.Replace(' ',$null)


### From Hex to Int
$Hex = '1e'

# a) via .Parse() method from Int type
[int]::Parse($Hex,'AllowHexSpecifier')
# NOTE: the "AllowHexSpecifier", is from the enum [System.Globalization.NumberStyles]

# b) interactively on the console
0x1e

# c) via Invoke-Expression
Invoke-Expression -Command "0x$Hex"


### From Hex String to Byte Array
$Hex = '0A141E28'

# a) via Convert class
[System.Convert]::FromHexString($Hex)
# NOTE: this is not available on PS v5
#       this is only available on PS v7+

# b) via .Parse() method from Int type
[regex]::Matches($Hex,'.{2}').Value | foreach {[int]::Parse($_,'AllowHexSpecifier') -as [byte]}