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.

func chilkatTest() {
    var success: Bool = false

    let jwe = CkoJwe()!

    //  Load the JWE compact serialization to be decrypted.
    var jweCompact: String? = "eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMjU2R0NNIn0.<...>.<iv>.<ciphertext>.<tag>"
    success = jwe.load(jwe: jweCompact)
    if success == false {
        print("\(jwe.lastErrorText!)")
        return
    }

    //  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.
    let privKey = CkoPrivateKey()!
    success = privKey.loadPemFile(path: "qa_data/recipient_privkey.pem")
    if success == false {
        print("\(privKey.lastErrorText!)")
        return
    }

    //  Set the private key used to decrypt recipient 0.
    success = jwe.setPrivateKey(index: 0, privKey: privKey)
    if success == false {
        print("\(jwe.lastErrorText!)")
        return
    }

    var content: String? = jwe.decrypt(index: 0, charset: "utf-8")
    if jwe.lastMethodSuccess == false {
        print("\(jwe.lastErrorText!)")
        return
    }

    print("\(content!)")

}