PowerShell

Load a JWE from a String

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.LoadJwe, which loads a JWE from its compact serialization string so it can be decrypted.

Background. JWE (JSON Web Encryption) protects content with a content-encryption algorithm (the header enc value) while the content-encryption key is managed by the key-management algorithm (the header alg value). This example uses AES key wrapping with a symmetric wrapping key.

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

$success = $false

$jwe = New-Object Chilkat.Jwe

#  Load a JWE from its compact serialization string.
$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
}

#  The loaded JWE can now be decrypted.
$content = $jwe.Decrypt(0,"utf-8")
if ($jwe.LastMethodSuccess -eq $false) {
    $($jwe.LastErrorText)
    exit
}

$($content)