Decrypt a JWE with a Private Key

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.SetPrivateKey, which sets the private key used to decrypt a recipient of a loaded JWE.

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

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 file path is relative to the application's current working directory.  An absolute path
#  may also be used.  Supply the path appropriate to your own environment.
#  Load the recipient's private key.
$privKey = New-Object Chilkat.PrivateKey
$success = $privKey.LoadPemFile("qa_data/recipient_privkey.pem")
if ($success -eq $false) {
    $($privKey.LastErrorText)
    exit
}

#  Set the private key used to decrypt recipient 0.
$success = $jwe.SetPrivateKey(0,$privKey)
if ($success -eq $false) {
    $($jwe.LastErrorText)
    exit
}

$content = $jwe.Decrypt(0,"utf-8")
if ($jwe.LastMethodSuccess -eq $false) {
    $($jwe.LastErrorText)
    exit
}

$($content)