Hash a Password with Argon2 (Tuned Options)

Demonstrates Crypt2.Argon2HashPassword with explicit options: the cost parameters, saltLen (how many random salt bytes to generate when no salt is given), and an optional secret (pepper).

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$crypt = New-Object Chilkat.Crypt2

#  The password should come from a secure source rather than being hard-coded.
$password = "correct horse battery staple"

#  The Argon2 options are the same members as Argon2DeriveKey, except the salt is optional for
#  hashing.  When no "salt" is given, a random salt is generated; "saltLen" (default 16, range 8..1024)
#  sets how many random bytes to use.
$json = New-Object Chilkat.JsonObject
$json.UpdateString("variant","argon2id")
$json.UpdateInt("memoryCostKb",131072)
$json.UpdateInt("iterations",4)
$json.UpdateInt("parallelism",2)
$json.UpdateInt("saltLen",16)

#  A secret (pepper) and/or ad may be used, but neither is stored in the returned PHC string.  The
#  same values must be supplied to Argon2VerifyPassword for the password to verify.
$json.UpdateString("secret","application-wide-pepper")
$json.UpdateString("secretEncoding","utf-8")

$phcHash = $crypt.Argon2HashPassword($password,$json.Emit())
if ($crypt.LastMethodSuccess -eq $false) {
    $($crypt.LastErrorText)
    exit
}

$($phcHash)