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.

require 'chilkat'

success = false

jwe = Chilkat::CkJwe.new()

#  Load the JWE compact serialization to be decrypted.
jweCompact = "eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMjU2R0NNIn0.<...>.<iv>.<ciphertext>.<tag>"
success = jwe.LoadJwe(jweCompact)
if (success == false)
    print jwe.lastErrorText() + "\n";
    exit
end

#  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 = Chilkat::CkPrivateKey.new()
success = privKey.LoadPemFile("qa_data/recipient_privkey.pem")
if (success == false)
    print privKey.lastErrorText() + "\n";
    exit
end

#  Set the private key used to decrypt recipient 0.
success = jwe.SetPrivateKey(0,privKey)
if (success == false)
    print jwe.lastErrorText() + "\n";
    exit
end

content = jwe.decrypt(0,"utf-8")
if (jwe.get_LastMethodSuccess() == false)
    print jwe.lastErrorText() + "\n";
    exit
end

print content + "\n";