Decrypt S/MIME using a Certificate with Private Key Access

See more MIME Examples

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

DecryptUsingCert takes a single certificate that already has access to its associated private key, for example a certificate loaded from a PFX.

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 a certificate that already provides access to its private key (for example loaded
-- from a PFX).  The only argument is the certificate.
local pfxPassword = "myPfxPassword"
local cert = chilkat.Cert.new()
success = cert:load_pfx_file("qa_data/recipient.pfx", pfxPassword)
if not success then
    print(cert.last_error_text)
    return
end

success = mime:decrypt_using_cert(cert)
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)