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.

local chilkat = require("chilkat")

local jwe = chilkat.Jwe.new()

-- Load the JWE compact serialization to be decrypted.
local jweCompact = "eyJhbGciOiJBMjU2S1ciLCJlbmMiOiJBMjU2R0NNIn0.<...>.<iv>.<ciphertext>.<tag>"
local success = jwe:load_jwe(jweCompact)
if not success then
    print(jwe.last_error_text)
    return
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.
local privKey = chilkat.PrivateKey.new()
success = privKey:load_pem_file("qa_data/recipient_privkey.pem")
if not success then
    print(privKey.last_error_text)
    return
end

-- Set the private key used to decrypt recipient 0.
success = jwe:set_private_key(0, privKey)
if not success then
    print(jwe.last_error_text)
    return
end

local content = jwe:decrypt(0, "utf-8")
if not jwe.last_method_success then
    print(jwe.last_error_text)
    return
end

print(content)