Decrypt S/MIME with an Explicit Certificate and Private Key

See more MIME Examples

Loads a CMS/PKCS #7 encrypted S/MIME message and decrypts it back to the original MIME content.

Decrypt2 accepts the certificate and its private key directly as arguments.

The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

local chilkat = require("chilkat")

local mime = chilkat.Mime.new()
local success = mime:load_mime_file("qa_data/encrypted.eml")
if not success then
    print(mime.last_error_text)
    return
end

-- Decrypt using an explicitly supplied certificate and private key.  The 1st argument is the
-- certificate and the 2nd is its private key.
local cert = chilkat.Cert.new()
success = cert:load_from_file("qa_data/recipient.cer")
if not success then
    print(cert.last_error_text)
    return
end

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

success = mime:decrypt2(cert, privKey)
if not success then
    print(mime.last_error_text)
    return
end

local body = mime:get_body_decoded()
if not mime.last_method_success then
    print(mime.last_error_text)
    return
end

print(body)