Decrypt a JWE into a StringBuilder

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.DecryptSb, which decrypts a recipient of a loaded JWE and writes the plaintext into a StringBuilder.

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

$success = $false

$jwe = New-Object Chilkat.Jwe

#  Load the JWE compact serialization to be decrypted.
$jweCompact = "eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMjU2R0NNIn0.<...>.<iv>.<ciphertext>.<tag>"
$success = $jwe.LoadJwe($jweCompact)
if ($success -eq $false) {
    $($jwe.LastErrorText)
    exit
}

#  The 256-bit key-wrapping key (base64) for recipient index 0.  In production, obtain the key
#  from a secure source rather than hard-coding it.
$base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
$success = $jwe.SetWrappingKey(0,$base64Key,"base64")
if ($success -eq $false) {
    $($jwe.LastErrorText)
    exit
}

#  Decrypt recipient index 0, writing the plaintext into a StringBuilder.
$sbContent = New-Object Chilkat.StringBuilder
$success = $jwe.DecryptSb(0,"utf-8",$sbContent)
if ($success -eq $false) {
    $($jwe.LastErrorText)
    exit
}

$($sbContent.GetAsString())